[Clang] Extend -Wbool-operation to warn about bitwise and of bools with side effects

[xbolva00]

Summary

Motivation: https://arstechnica.com/gadgets/2021/07/google-pushed-a-one-character-typo-to-production-bricking-chrome-os-devices/

Warn for pattern boolA & boolB or boolA | boolB where boolA and boolB has possible side effects.

Casting one operand to int is enough to silence this warning: for example (int)boolA & boolB or boolA| (int)boolB

Fixes https://bugs.llvm.org/show_bug.cgi?id=51216

[xbolva00]

Open questions:
1, warn for pattern boolA & boolB always? I think that we will have some false positives.
2, restrict this warning even more? RHS must be a call?
3, something similar for bitwise or?

@hans @nickdesaulniers maybe you want to try this new warning on Chrome/Linux kernel?

[• Quuxplusone]

clang/include/clang/Basic/DiagnosticSemaKinds.td

7436–7438

I suggest that the name and wording of this diagnostic should match warn_logical_instead_of_bitwise, currently "use of logical '%0' with constant operand". So:

def warn_bitwise_instead_of_logical : Warning<
  "use of bitwise '%0' with boolean operand">,

This neatly sidesteps the problem of what to call the & operator: I was not thrilled with the phrase bitwise and of, but have no problem with use of bitwise '&'.

clang/test/Sema/warn-bitwise-and-bool.c

22–23

So the warning triggers only when the RHS has side-effects? I'd like tests for

foo() & a;  // should not trigger, by that logic, because && wouldn't short-circuit anything?
(p != nullptr) & (*p == 42);  // should certainly trigger: deref is a side effect, and of course obviously this is a bug

32

Why is this assigning to i instead of b?
Actually, the assignment shouldn't matter to the diagnostic at all, right? Perhaps each test case should be written as, like,

void sink(bool);

   sink(a & b);
   sink(a & foo());
   sink(foo() & bar());

etc.

35

I'd also like a negative test for @mclow.lists' example of int n = ...; b = (n & (n-1)); (where the result is being used as a boolean, but the bitwise op is correct and the logical op would be 100% wrong).

37

I assume you meant bitand and expect a warning?

[xbolva00]

Added new tests.

Thanks for recommendations.

[mclow.lists]

I suggest you take all the techniques at http://graphics.stanford.edu/~seander/bithacks.html and make sure they don't cause a warning.

[xbolva00]

clang/include/clang/Basic/DiagnosticSemaKinds.td

7436–7438

I see the point but then I will not be able to provide -Wbool-operation-and flag to enable/disable this warning.

For example I know that Google prefers a new flag for every new warning so they dont have to disable eg. -Wbool-operation, but just this new warning while there are working on fixes for new warnings.

@hans what do you think?

[xbolva00]

clang/test/Sema/warn-bitwise-and-bool.c

22–23

Yes, but oh.

This is weird, HasSideEffects is false for this case. Works fine for volatile int.

@rsmith?

[xbolva00]

New test with volatile int.

[nathanchance]

With several Linux kernel defconfig builds, I see the following instances of the warning:

drivers/net/wireless/intel/iwlwifi/mvm/scan.c:835:3: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
drivers/staging/rtl8192u/r8192U_core.c:4268:20: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1043:7: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1075:30: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1294:7: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1353:30: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1932:7: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1956:22: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:1977:23: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]
lib/zstd/compress.c:2024:29: warning: bitwise and of boolean expressions; did you mean logical and? [-Wbool-operation-and]

Which correspond to:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/wireless/intel/iwlwifi/mvm/scan.c#n830

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/staging/rtl8192u/r8192U_core.c#n4268

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/zstd/compress.c#n1294

I can do allmodconfig builds later today.

[xbolva00]

Thanks!

Well, for those cases, && instead of & looks like a better choice. WDYT?

Or is it a very noisy? Restrict more so both sides must have side effects?

Maybe we could suggest to use cast - (int)boolRHS - as a way how to silence this warning.. Or any better suggestion?

[aeubanks]

I ran this over Chrome and ran into a use case that looks legitimate. It seems like the pattern in LLVM where we want to run a bunch of transformations and get if any of them changed anything.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/api/audio/echo_canceller3_config.cc;drc=cbdbb8c1666fd08a094422905e73391706a05b03;l=111

[• Quuxplusone]

FWIW, all three of @nathanchance's detected lines look like good true positives to me: even if they're not bugs, they all look like places the programmer meant to write && and only wrote & by accident. The third one might even be a bug bug, since it's doing essentially (bounds-check offset_1) & (pointer-math-on offset_1).
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/wireless/intel/iwlwifi/mvm/scan.c#n830
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/staging/rtl8192u/r8192U_core.c#n4268
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/zstd/compress.c#n1294

Data point: I've run this patch over my employer's medium-sized mostly-modern codebase and found no (true or false) positives at all.

[• Quuxplusone]

clang/include/clang/Basic/DiagnosticSemaKinds.td

7436–7438

I don't understand your comment. My guess is that you didn't notice that -Wbitwise-instead-of-logical would still be a different flag from -Wlogical-instead-of-bitwise. I'm not suggesting putting them under the same flag; just making the newly added flag a little more consistent and (heh) logical, based on what's already there.

[nathanchance]

In D108003#2944413, @Quuxplusone wrote:

FWIW, all three of @nathanchance's detected lines look like good true positives to me: even if they're not bugs, they all look like places the programmer meant to write && and only wrote & by accident. The third one might even be a bug bug, since it's doing essentially (bounds-check offset_1) & (pointer-math-on offset_1).

Agreed, I do plan to send patches to fix these up. I will test the warning against a wider range of code later to help evaluate how noisy it is and look for false positives.

[xbolva00]

In D108003#2944178, @aeubanks wrote:

I ran this over Chrome and ran into a use case that looks legitimate. It seems like the pattern in LLVM where we want to run a bunch of transformations and get if any of them changed anything.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/api/audio/echo_canceller3_config.cc;drc=cbdbb8c1666fd08a094422905e73391706a05b03;l=111

Maybe “res &= foo ();” would be better? “Changed |= foo();” is very typical for LLVM.

[nathanchance]

I have sent the following patches for the Linux kernel. These were the only instances of the warning that I found across the code base in all of the configurations that we usually test so thank you for the heads up so I could send fixes before this lands.

https://lore.kernel.org/r/[e-mail]/
https://lore.kernel.org/r/[e-mail]/
https://lore.kernel.org/r/[e-mail]/

Is there a reason -Wbool-operation is not in -Wall? It is with GCC (although now, their -Wbool-operation is equivalent to just Wbool-operation-negation. I know that is tangential to this patch but if we want to take advantage of this new warning, we will have to explicitly enable -Wbool-operation in the kernel's Makefile.

[xbolva00]

-Wbool-operation is basically enabled even without -Wall, but yeah, gcc only warns with -Wall specified.

I will change it as well.

[xbolva00]

Rebased.
Changed the warning text.

[aeubanks]

In D108003#2944714, @xbolva00 wrote:

In D108003#2944178, @aeubanks wrote:

I ran this over Chrome and ran into a use case that looks legitimate. It seems like the pattern in LLVM where we want to run a bunch of transformations and get if any of them changed anything.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/api/audio/echo_canceller3_config.cc;drc=cbdbb8c1666fd08a094422905e73391706a05b03;l=111

Maybe “res &= foo ();” would be better? “Changed |= foo();” is very typical for LLVM.

Can we either emit that as a suggestion if the code looks like a = a & foo()? Or simply not emit a warning?

[• Quuxplusone]

Can we either emit that [a &= foo()] as a suggestion if the code looks like a = a & foo()? Or simply not emit a warning?

The problem is that if a is boolean, then a = a & something is 99% for sure a typo — 99% of the time, the programmer meant a = a && something. So any compiler suggestion or fixit that blindly "doubles down" on the non-short-circuiting behavior is a bad idea. https://quuxplusone.github.io/blog/2020/09/02/wparentheses/ is relevant.

One proper way to silence the warning without short-circuiting would be a = int(a) & something — this indicates that you really do want integer bitwise-ANDing, not boolean. Alternatively, and probably best, just declare a as an integer variable to begin with. Of course the compiler cannot recommend this if something isn't strictly zero or one. But in that case you might already have a bug:

int error_returning_func() { return 2; }
int main() {
    bool t = true;
    t = t && error_returning_func();
    assert(t);  // still true
    t = t & error_returning_func();
    assert(!t);  // now it's false
}

So typo'ing & for && doesn't just turn off short-circuiting — it can also mess up the runtime value stored in the bool.

[aeubanks]

In D108003#2944178, @aeubanks wrote:

I ran this over Chrome and ran into a use case that looks legitimate. It seems like the pattern in LLVM where we want to run a bunch of transformations and get if any of them changed anything.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/api/audio/echo_canceller3_config.cc;drc=cbdbb8c1666fd08a094422905e73391706a05b03;l=111

The remaining places where this fired looked like places where && would be better than &, except for one where the code was treating bools as one bit integers and doing various bitwise operations on them
https://source.chromium.org/chromium/chromium/src/+/main:third_party/distributed_point_functions/src/dpf/distributed_point_function.cc;drc=87b84b3834343e141ec94e3321f4d1c7be8a7a9d;l=230

[rpbeltran]

This patch seems like a great contribution! Really glad to see this being added. I did have a question though on why this only appears to catch "&" vs "&&" instead of doing the same for "|" vs "||". It seems like both operators have roughly the same potential for confusion. Could we add support for bitwise vs logical or in this?

[xbolva00]

In D108003#2955058, @rpbeltran wrote:

This patch seems like a great contribution! Really glad to see this being added. I did have a question though on why this only appears to catch "&" vs "&&" instead of doing the same for "|" vs "||". It seems like both operators have roughly the same potential for confusion. Could we add support for bitwise vs logical or in this?

Yeah, I mentioned in the first comment as part of “open questions”. Basically at first we need to find out some reasonable “heuristics” when to warn and then support for | should be added.

[xbolva00]

• Only warn when both sides have potentional side effects (conversative, but covers motivating case, reduces useless noise - which may hide real bug - caused by this warning)
• Added support for bitwise | + tests.

[xbolva00]

In D108003#2955009, @aeubanks wrote:

In D108003#2944178, @aeubanks wrote:

I ran this over Chrome and ran into a use case that looks legitimate. It seems like the pattern in LLVM where we want to run a bunch of transformations and get if any of them changed anything.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/webrtc/api/audio/echo_canceller3_config.cc;drc=cbdbb8c1666fd08a094422905e73391706a05b03;l=111

The remaining places where this fired looked like places where && would be better than &, except for one where the code was treating bools as one bit integers and doing various bitwise operations on them
https://source.chromium.org/chromium/chromium/src/+/main:third_party/distributed_point_functions/src/dpf/distributed_point_function.cc;drc=87b84b3834343e141ec94e3321f4d1c7be8a7a9d;l=230

New revision should be more conversative to avoid warning on cases you mentioned.

[xbolva00]

@rpbeltran please check new revision, I added support for bitwise OR.

[rpbeltran]

Thanks! And sorry for missing that point in your first comment.

[nathanchance]

I am still running a series of builds against the Linux kernel but I already see one instance of this warning where the suggestion would change the meaning of the code in an incorrect way:

drivers/input/touchscreen.c:81:17: warning: use of bitwise '|' with boolean operands [-Wbool-operation]
        data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x",
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/touchscreen.c:81:17: warning: use of bitwise '|' with boolean operands [-Wbool-operation]
        data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x",
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/touchscreen.c:94:17: warning: use of bitwise '|' with boolean operands [-Wbool-operation]
        data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y",
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/touchscreen.c:94:17: warning: use of bitwise '|' with boolean operands [-Wbool-operation]
        data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y",
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/touchscreen.c:108:17: warning: use of bitwise '|' with boolean operands [-Wbool-operation]
        data_present = touchscreen_get_prop_u32(dev,
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 warnings generated.

Which corresponds to this file: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/input/touchscreen.c?h=v5.14-rc6

If the calls to touchscreen_get_prop_u32 short circuit, we could use maximum or fuzz uninitialized. There might be a cleaner way to rewrite that block to avoid the warning but based on the other instances of this warning I see, I am not sure | vs. || is worth warning about (but I am happy to hear examples of how it could be a bug). Most people realize && short circuits (as if (a && foo(a->...)) is relatively common) but most probably are not thinking about || short circuiting (and it would be more of an optimization than correctness issue as far as I understand it).

Additionally, I have not caught any instances of & being used instead of &&, including the ones I notated previously; those were caught because only the right side had side effects. As was pointed out here and on the mailing list, the lib/zstd/ warning is probably a bug, as the short circuit should happen if offset_1 is zero, otherwise there is unnecessary work done.

[xbolva00]

and it would be more of an optimization than correctness issue as far as I understand

Yeah, this is right, indeed.

Maybe @rpbeltran has some idea or motivating cases for OR pattern?

[rpbeltran]

In D108003#2956332, @xbolva00 wrote:

and it would be more of an optimization than correctness issue as far as I understand

Yeah, this is right, indeed.

Maybe @rpbeltran has some idea or motivating cases for OR pattern?

I don't actually have a case off-hand that I've spotted from the real world, but this example snippet seems plausible enough:

if (queue.empty() || queue.pop() == STOP_TOKEN) {
  break;
}

Consider that in this scenario, we only consider queue.pop() if the queue is not empty due to short circuiting.

if (queue.empty() | queue.pop() == STOP_TOKEN) {
  break;
}

While this scenario calls pop() regardless, likely causing a runtime error if the queue is empty.

I'll run this warning against ChromeOS and see if I spot any interesting results.

[xbolva00]

I'll run this warning against ChromeOS and see if I spot any interesting results.

Thanks!

[xbolva00]

Ping

I think I will start with AND only as this is more error prone pattern.

[• Quuxplusone]

In D108003#2983609, @xbolva00 wrote:

I think I will start with AND only as this is more error prone pattern.

FWIW, I still see no reason not to warn on |-for-||. Again per https://quuxplusone.github.io/blog/2020/09/02/wparentheses/ : if we see the programmer writing somebool | foo, we know they've messed up — they might have meant either int(somebool) | foo or somebool || foo, we're not sure which, but we know they've messed up somehow. So it makes sense to tell them about it. The codepaths for &&/& and ||/| are going to be shared, right? So I see no reason to special-case-not-warn on |.
I do agree that it seems reasonable for people to screw up & more frequently than |. It's very common in C and C++ to type just a single & (e.g. for address-of); it's very uncommon to ever type a single |, so the muscle memory won't be there to typo it. Also, | is way off on the side of the keyboard where the typist is probably paying a little more attention; & is right in the hot path where our fingers are likely moving quickly. But from the compiler's POV, we might be surprised to see the rare |-for-|| typo ("whoa! I hardly ever see one of those!") but that's no reason to keep it a secret from the user.

clang/test/Sema/warn-bitwise-or-bool.c

39

Arguably, foo() bitor bar() is a sufficiently high "degree of ornamentation" to unambiguously signal the programmer's intent here. What are the chances that the programmer wrote bitor instead of or by accident? But it's not worth adding any code just to special-case-not-warn here.
(The reverse — writing or when you meant bitor — strikes me as a more likely error.)
D107294 is related.

[hans]

clang/include/clang/Basic/DiagnosticSemaKinds.td

7436–7438

@hans what do you think?

I think we're all in agreement here. Putting this behind a separate -Wbitwise-instead-of-logical flag sounds good to me.

clang/test/Sema/warn-bitwise-and-bool.c

22–23

I don't think a non-volatile pointer deref actually has any side effect. I think what we'd want to check here is if the expression could be reordered with the LHS. But I don't know how we'd check that.

[rpbeltran]

Sorry for the late reply on this. I ran the warning against ChromeOS and actually found very few false positives and a couple interesting findings to file bugs for. I actually saw about an equal number of cases caught for & and |.

https://source.chromium.org/chromium/chromium/src/+/main:third_party/perfetto/src/perfetto_cmd/perfetto_cmd.cc;l=492?q=%22(is_attach()%20%7C%20is_detach()%20%7C%7C%20query_service_%20%7C%7C%20has_config_options))%22

https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/third_party/kernel/v4.4/drivers/gpu/drm/i915/i915_drv.h?q=%22i915_reset_in_progress(error)%20%7C%20i915_terminally_wedged(error)%22

https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/platform2/power_manager/powerd/policy/charge_controller.cc?q=%22ApplyPeakShiftChange(policy)%20%26%20ApplyBootOnAcChange(policy)%20%26%22

https://source.chromium.org/chromium/chromium/src/+/main:third_party/angle/src/libANGLE/renderer/gl/VertexArrayGL.cpp?q=%22const%20bool%20enabled%20%3D%20mState.getVertexAttribute(attribIndex).enabled%20%26%22

https://source.chromium.org/chromium/chromium/src/+/main:third_party/harfbuzz-ng/src/src/hb-ot-layout-gpos-table.hh?q=%22if%20(valueFormats%5B0%5D.apply_value%20(c,%20this,%20%26record-%3Evalues%5B0%5D,%20buffer-%3Ecur_pos())%20%7C%22

https://source.chromium.org/chromium/chromium/src/+/main:third_party/harfbuzz-ng/src/src/hb-ot-layout-gpos-table.hh?q=%22if%20(valueFormat1.apply_value%20(c,%20this,%20v,%20buffer-%3Ecur_pos())%20%7C%22

[xbolva00]

Introduced -Wbitwise-instead-of-logical flag.

[xbolva00]

Looks OK now? or something more to be done?

[• Quuxplusone]

LGTM % comments, FWIW.

clang/test/Sema/warn-bitwise-and-bool.c

27

Perhaps add a TODO FIXME comment here? I still think this should be fixed, but I'm willing to believe that it's unduly difficult and defer it to later. :)

28

For each warning case (or at least for one or two of them), could we also test (my suggested) suppression mechanism? I think it "obviously" just works, but it'd be good to test explicitly that it works.

b = foo() & (int)(*q == 42);  // OK, no warning expected

[xbolva00]

Addressed comments.

[xbolva00]

Maybe we should emit note like “insert explicit cast of one or both operands to int to silence this warning” (any idea for better note text?)? I think it could be useful.

[xbolva00]

Emit note to explain a user how to silence this warning.

[• Quuxplusone]

clang/include/clang/Basic/DiagnosticSemaKinds.td

69

LGTM, based on the precedent set on line 68. If I were writing all these notes from scratch, I'd say "to silence this warning"; but that can be done in a separate PR, if ever.

[xbolva00]

clang/include/clang/Basic/DiagnosticSemaKinds.td

69

Yeah, silence this warning is better and also used (well, more often) in this file. I will change it to this form.

[xbolva00]

@rpbeltran @nathanchance @aaron.ballman Are you OK with the current state of this patch? Well, it is clear that some code in linux kernel/Chromium/etc needs to adjusted, but I think in many cases it would (atleast) improve readability.

[nathanchance]

As far as I am aware, this iteration of the patch has no instances in the Linux kernel now. The instances I found with the first iteration of the patch only had a right hand side with side effects, not both sides, so this warning is effectively a no-op now (not that there won't be instances in the future). If any happen to show up, I will send fixes for them at that time. In other words, LGTM.

[xbolva00]

Updated warning-wall.c test.

[sylvestre.ledru]

It found a few issues on Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1734285

I think it should be added it in the release notes:
https://reviews.llvm.org/D111215

[xbolva00]

In D108003#3044853, @sylvestre.ledru wrote:

It found a few issues on Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1734285

I think it should be added it in the release notes:
https://reviews.llvm.org/D111215

Thanks, all found cases are not “security/memory” issues but they should use logical op to improve code readability (no reason for bitwise op).

[thakis]

Thanks for this warning! I just finished turning it on in Chromium. Here's a short report on the things it fired on in case it's interesting to anyone. (I'm not suggesting any changes to the warning, I think it works very well as-is).

The warning fired in 21 different files. In 16 cases, using && instead of & and || instead of | was possible, but the change was inconsequential [1]. In 6 cases, & and | were used intentionally to prevent short-circuiting, but it wasn't always obvious that that was the case. I usually rewrote the code to make it more obvious [2]. In addition to these, there was of course the true positive that motivated this warning :)

Apparently we build a (small) subset of LLVM 10 as part of some dependency of chrome. The warning fired a few times there, so I turned it off for those files (in trunk LLVM it's fixed). I also found a quality-of-implementation bug with the warning which I reported as https://bugs.llvm.org/show_bug.cgi?id=52226

1:
https://chromium-review.googlesource.com/c/angle/angle/+/3212889/2/src/libANGLE/renderer/gl/VertexArrayGL.cpp
https://chromium-review.googlesource.com/c/angle/angle/+/3212889/2/src/tests/gl_tests/CopyTexImageTest.cpp
https://chromium-review.googlesource.com/c/chromium/src/+/3212300/2/content/browser/payments/payment_app_database.cc
https://chromium-review.googlesource.com/c/chromium/src/+/3212300/2/gin/v8_initializer.cc
https://chromium-review.googlesource.com/c/chromium/src/+/3212300/2/net/spdy/spdy_http_stream.cc
https://chromium-review.googlesource.com/c/chromium/src/+/3212300/2/services/network/url_loader.cc
https://chromium-review.googlesource.com/c/chromium/src/+/3212300/2/third_party/blink/renderer/core/intersection_observer/intersection_observation.cc
https://chromium-review.googlesource.com/c/chromium/src/+/3229610/2/chromecast/cast_core/url_rewrite_rules_adapter.cc
https://chromium-review.googlesource.com/c/v8/v8/+/3212891/2/src/objects/feedback-vector.cc
https://chromium-review.googlesource.com/c/v8/v8/+/3231077/2/src/codegen/arm64/assembler-arm64.cc
https://chromium.googlesource.com/external/github.com/google/distributed_point_functions/+/61ff31aecab6955ad9ed2dac8684375f999eb9f8%5E%21/#F0
https://dawn-review.googlesource.com/c/dawn/+/66200/2/src/tests/end2end/QueryTests.cpp
https://github.com/KhronosGroup/Vulkan-ValidationLayers/commit/51279399eaecf651d176544d8197f91f48637b2f
https://github.com/netwide-assembler/nasm/pull/17
https://skia-review.googlesource.com/c/skia/+/459456/3/src/core/SkColorFilter.cpp
https://webrtc-review.googlesource.com/c/src/+/234600/2/media/engine/simulcast_encoder_adapter.cc

2:
https://bugs.chromium.org/p/chromium/issues/detail?id=1261591 (still undecided)
https://chromium-review.googlesource.com/c/v8/v8/+/3212891/2/src/compiler/branch-elimination.cc
https://github.com/harfbuzz/harfbuzz/pull/3256
https://skia-review.googlesource.com/c/skia/+/459456/3/modules/skottie/src/animator/Vec2KeyframeAnimator.cpp
https://skia-review.googlesource.com/c/skia/+/459456/3/modules/skottie/src/animator/VectorKeyframeAnimator.cpp
https://skia-review.googlesource.com/c/skia/+/459456/3/src/core/SkPathEffect.cpp

clang/include/clang/Basic/DiagnosticGroups.td

 def ConstantConversion : DiagGroup<"constant-conversion",
                                    [BitFieldConstantConversion,
                                     ObjCBoolConstantConversion]>;
 def LiteralConversion : DiagGroup<"literal-conversion">;
 def StringConversion : DiagGroup<"string-conversion">;
 def SignConversion : DiagGroup<"sign-conversion">;
 def PointerBoolConversion : DiagGroup<"pointer-bool-conversion">;
 def UndefinedBoolConversion : DiagGroup<"undefined-bool-conversion">;
-def BoolOperation : DiagGroup<"bool-operation">;
+def BitwiseInsteadOfLogical : DiagGroup<"bitwise-instead-of-logical">;
+def BoolOperation : DiagGroup<"bool-operation", [BitwiseInsteadOfLogical]>;
 def BoolConversion : DiagGroup<"bool-conversion", [PointerBoolConversion,
                                                    UndefinedBoolConversion]>;
 def IntConversion : DiagGroup<"int-conversion">;
 def ClassConversion: DiagGroup<"class-conversion">;
 def DeprecatedEnumCompareConditional :
   DiagGroup<"deprecated-enum-compare-conditional">;
 def EnumCompareConditional : DiagGroup<"enum-compare-conditional",
                                        [DeprecatedEnumCompareConditional]>;

clang/include/clang/Basic/DiagnosticSemaKinds.td

 
 def warn_infinite_recursive_function : Warning<
   "all paths through this function will call itself">,
   InGroup<InfiniteRecursion>, DefaultIgnore;
 
 def warn_comma_operator : Warning<"possible misuse of comma operator here">,
   InGroup<DiagGroup<"comma">>, DefaultIgnore;
 def note_cast_to_void : Note<"cast expression to void to silence warning">;
+def note_cast_operand_to_int : Note<"cast one or both operands to int to silence this warning">;
 
 // Constant expressions
 def err_expr_not_ice : Error<
   "expression is not an %select{integer|integral}0 constant expression">;
 def ext_expr_not_ice : Extension<
   "expression is not an %select{integer|integral}0 constant expression; "
   "folding it to a constant is a GNU extension">, InGroup<GNUFoldingConstant>;
 def err_typecheck_converted_constant_expression : Error<

 def warn_ambiguous_suitable_delete_function_found : Warning<
   "multiple suitable %0 functions for %1; no 'operator delete' function "
   "will be invoked if initialization throws an exception">,
   InGroup<DiagGroup<"ambiguous-delete">>;
 def note_member_declared_here : Note<
   "member %0 declared here">;
 def note_member_first_declared_here : Note<
   "member %0 first declared here">;
+def warn_bitwise_instead_of_logical : Warning<
+  "use of bitwise '%0' with boolean operands">,
+  InGroup<BitwiseInsteadOfLogical>, DefaultIgnore;
 def warn_bitwise_negation_bool : Warning<
   "bitwise negation of a boolean expression%select{;| always evaluates to 'true';}0 "
   "did you mean logical negation?">,
   InGroup<BoolOperation>, DefaultIgnore;
 def err_decrement_bool : Error<"cannot decrement expression of type bool">;
 def warn_increment_bool : Warning<
   "incrementing expression of type bool is deprecated and "
   "incompatible with C++17">, InGroup<DeprecatedIncrementBool>;
 def ext_increment_bool : ExtWarn<
   "ISO C++17 does not allow incrementing expression of type bool">,
   DefaultError, InGroup<IncrementBool>;
 def err_increment_decrement_enum : Error<
   "cannot %select{decrement|increment}0 expression of enum type %1">;
 
 def warn_deprecated_increment_decrement_volatile : Warning<

clang/lib/Sema/SemaChecking.cpp

 
   if (const auto *UO = dyn_cast<UnaryOperator>(SourceExpr))
     if (UO->getOpcode() == UO_Not &&
         UO->getSubExpr()->isKnownToHaveBooleanValue())
       S.Diag(UO->getBeginLoc(), diag::warn_bitwise_negation_bool)
           << OrigE->getSourceRange() << T->isBooleanType()
           << FixItHint::CreateReplacement(UO->getBeginLoc(), "!");
 
+  if (const auto *BO = dyn_cast<BinaryOperator>(SourceExpr))
+    if ((BO->getOpcode() == BO_And || BO->getOpcode() == BO_Or) &&
+        BO->getLHS()->isKnownToHaveBooleanValue() &&
+        BO->getRHS()->isKnownToHaveBooleanValue() &&
+        BO->getLHS()->HasSideEffects(S.Context) &&
+        BO->getRHS()->HasSideEffects(S.Context)) {
+      S.Diag(BO->getBeginLoc(), diag::warn_bitwise_instead_of_logical)
+          << (BO->getOpcode() == BO_And ? "&" : "|") << OrigE->getSourceRange()
+          << FixItHint::CreateReplacement(
+                 BO->getOperatorLoc(),
+                 (BO->getOpcode() == BO_And ? "&&" : "||"));
+      S.Diag(BO->getBeginLoc(), diag::note_cast_operand_to_int);
+    }
+
   // For conditional operators, we analyze the arguments as if they
   // were being fed directly into the output.
   if (auto *CO = dyn_cast<AbstractConditionalOperator>(SourceExpr)) {
     CheckConditionalOperator(S, CO, CC, T);
     return;
   }
 
   // Check implicit argument conversions for function calls.

clang/p.patch

+commit adf60359516a9600ccea36ced7240fa5a6242740
+Author: Dávid Bolvanský <[e-mail]>
+Date:   Sun Sep 26 16:41:33 2021 +0200
+
+    [Clang] Extend -Wbool-operation to warn about bitwise and of bools with side effects
+    
+    Motivation: https://arstechnica.com/gadgets/2021/07/google-pushed-a-one-character-typo-to-production-bricking-chrome-os-devices/
+    
+    Warn for pattern boolA & boolB or boolA | boolB where boolA and boolB has possible side effects.
+    
+    Fixes https://bugs.llvm.org/show_bug.cgi?id=51216
+    
+    Differential Revision: https://reviews.llvm.org/D108003
+
+diff --git a/clang/include/clang/Basic/DiagnosticGroups.td b/clang/include/clang/Basic/DiagnosticGroups.td
+index f48598eec326..3fbcd77f4619 100644
+--- a/clang/include/clang/Basic/DiagnosticGroups.td
++++ b/clang/include/clang/Basic/DiagnosticGroups.td
+@@ -1,1066 +1,1067 @@
+ //==--- DiagnosticGroups.td - Diagnostic Group Definitions ----------------===//
+ //
+ // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+ // See https://llvm.org/LICENSE.txt for license information.
+ // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ def ImplicitFunctionDeclare : DiagGroup<"implicit-function-declaration">;
+ def ImplicitInt : DiagGroup<"implicit-int">;
+ 
+ // Aggregation warning settings.
+ def Implicit : DiagGroup<"implicit", [
+     ImplicitFunctionDeclare,
+     ImplicitInt
+ ]>;
+ 
+ // Empty DiagGroups are recognized by clang but ignored.
+ def ODR : DiagGroup<"odr">;
+ def : DiagGroup<"abi">;
+ def AbsoluteValue : DiagGroup<"absolute-value">;
+ def MisspelledAssumption : DiagGroup<"misspelled-assumption">;
+ def UnknownAssumption : DiagGroup<"unknown-assumption">;
+ def AddressOfTemporary : DiagGroup<"address-of-temporary">;
+ def : DiagGroup<"aggregate-return">;
+ def GNUAlignofExpression : DiagGroup<"gnu-alignof-expression">;
+ def AmbigMemberTemplate : DiagGroup<"ambiguous-member-template">;
+ def GNUAnonymousStruct : DiagGroup<"gnu-anonymous-struct">;
+ def GNUAutoType : DiagGroup<"gnu-auto-type">;
+ def ArrayBounds : DiagGroup<"array-bounds">;
+ def ArrayBoundsPointerArithmetic : DiagGroup<"array-bounds-pointer-arithmetic">;
+ def AutoDisableVptrSanitizer : DiagGroup<"auto-disable-vptr-sanitizer">;
+ def Availability : DiagGroup<"availability">;
+ def Section : DiagGroup<"section">;
+ def AutoImport : DiagGroup<"auto-import">;
+ def FrameworkHdrQuotedInclude : DiagGroup<"quoted-include-in-framework-header">;
+ def FrameworkIncludePrivateFromPublic :
+   DiagGroup<"framework-include-private-from-public">;
+ def FrameworkHdrAtImport : DiagGroup<"atimport-in-framework-header">;
+ def CXX14BinaryLiteral : DiagGroup<"c++14-binary-literal">;
+ def CXXPre14CompatBinaryLiteral : DiagGroup<"c++98-c++11-compat-binary-literal">;
+ def GNUBinaryLiteral : DiagGroup<"gnu-binary-literal">;
+ def BinaryLiteral : DiagGroup<"binary-literal", [CXX14BinaryLiteral,
+                                                  CXXPre14CompatBinaryLiteral,
+                                                  GNUBinaryLiteral]>;
+ def GNUCompoundLiteralInitializer : DiagGroup<"gnu-compound-literal-initializer">;
+ def BitFieldConstantConversion : DiagGroup<"bitfield-constant-conversion">;
+ def BitFieldEnumConversion : DiagGroup<"bitfield-enum-conversion">;
+ def BitFieldWidth : DiagGroup<"bitfield-width">;
+ def CompoundTokenSplitByMacro : DiagGroup<"compound-token-split-by-macro">;
+ def CompoundTokenSplitBySpace : DiagGroup<"compound-token-split-by-space">;
+ def CompoundTokenSplit : DiagGroup<"compound-token-split",
+                                    [CompoundTokenSplitByMacro,
+                                     CompoundTokenSplitBySpace]>;
+ def CoroutineMissingUnhandledException :
+   DiagGroup<"coroutine-missing-unhandled-exception">;
+ def Coroutine : DiagGroup<"coroutine", [CoroutineMissingUnhandledException]>;
+ def ObjCBoolConstantConversion : DiagGroup<"objc-bool-constant-conversion">;
+ def ConstantConversion : DiagGroup<"constant-conversion",
+                                    [BitFieldConstantConversion,
+                                     ObjCBoolConstantConversion]>;
+ def LiteralConversion : DiagGroup<"literal-conversion">;
+ def StringConversion : DiagGroup<"string-conversion">;
+ def SignConversion : DiagGroup<"sign-conversion">;
+ def PointerBoolConversion : DiagGroup<"pointer-bool-conversion">;
+ def UndefinedBoolConversion : DiagGroup<"undefined-bool-conversion">;
+-def BoolOperation : DiagGroup<"bool-operation">;
++def BitwiseInsteadOfLogical : DiagGroup<"bitwise-instead-of-logical">;
++def BoolOperation : DiagGroup<"bool-operation", [BitwiseInsteadOfLogical]>;
+ def BoolConversion : DiagGroup<"bool-conversion", [PointerBoolConversion,
+                                                    UndefinedBoolConversion]>;
+ def IntConversion : DiagGroup<"int-conversion">;
+ def ClassConversion: DiagGroup<"class-conversion">;
+ def DeprecatedEnumCompareConditional :
+   DiagGroup<"deprecated-enum-compare-conditional">;
+ def EnumCompareConditional : DiagGroup<"enum-compare-conditional",
+                                        [DeprecatedEnumCompareConditional]>;
+ def EnumCompareSwitch : DiagGroup<"enum-compare-switch">;
+ def DeprecatedEnumCompare : DiagGroup<"deprecated-enum-compare">;
+ def EnumCompare : DiagGroup<"enum-compare", [EnumCompareSwitch,
+                                              DeprecatedEnumCompare]>;
+ def DeprecatedAnonEnumEnumConversion : DiagGroup<"deprecated-anon-enum-enum-conversion">;
+ def DeprecatedEnumEnumConversion : DiagGroup<"deprecated-enum-enum-conversion">;
+ def DeprecatedEnumFloatConversion : DiagGroup<"deprecated-enum-float-conversion">;
+ def AnonEnumEnumConversion : DiagGroup<"anon-enum-enum-conversion",
+                                    [DeprecatedAnonEnumEnumConversion]>;
+ def EnumEnumConversion : DiagGroup<"enum-enum-conversion",
+                                    [DeprecatedEnumEnumConversion]>;
+ def EnumFloatConversion : DiagGroup<"enum-float-conversion",
+                                     [DeprecatedEnumFloatConversion]>;
+ def EnumConversion : DiagGroup<"enum-conversion",
+                                [EnumEnumConversion,
+                                 EnumFloatConversion,
+                                 EnumCompareConditional]>;
+ def ObjCSignedCharBoolImplicitIntConversion :
+   DiagGroup<"objc-signed-char-bool-implicit-int-conversion">;
+ def ImplicitIntConversion : DiagGroup<"implicit-int-conversion",
+                                      [ObjCSignedCharBoolImplicitIntConversion]>;
+ def ImplicitConstIntFloatConversion : DiagGroup<"implicit-const-int-float-conversion">;
+ def ImplicitIntFloatConversion : DiagGroup<"implicit-int-float-conversion",
+  [ImplicitConstIntFloatConversion]>;
+ def ObjCSignedCharBoolImplicitFloatConversion :
+   DiagGroup<"objc-signed-char-bool-implicit-float-conversion">;
+ def ImplicitFloatConversion : DiagGroup<"implicit-float-conversion",
+   [ImplicitIntFloatConversion,
+    ObjCSignedCharBoolImplicitFloatConversion]>;
+ def ImplicitFixedPointConversion : DiagGroup<"implicit-fixed-point-conversion">;
+ 
+ def FloatOverflowConversion : DiagGroup<"float-overflow-conversion">;
+ def FloatZeroConversion : DiagGroup<"float-zero-conversion">;
+ def FloatConversion :
+   DiagGroup<"float-conversion", [FloatOverflowConversion,
+                                  FloatZeroConversion]>;
+ 
+ def FrameAddress : DiagGroup<"frame-address">;
+ def FreeNonHeapObject : DiagGroup<"free-nonheap-object">;
+ def DoublePromotion : DiagGroup<"double-promotion">;
+ def EnumTooLarge : DiagGroup<"enum-too-large">;
+ def UnsupportedNan : DiagGroup<"unsupported-nan">;
+ def UnsupportedAbs : DiagGroup<"unsupported-abs">;
+ def UnsupportedFPOpt : DiagGroup<"unsupported-floating-point-opt">;
+ def UnsupportedCB : DiagGroup<"unsupported-cb">;
+ def UnsupportedGPOpt : DiagGroup<"unsupported-gpopt">;
+ def UnsupportedTargetOpt : DiagGroup<"unsupported-target-opt">;
+ def NonLiteralNullConversion : DiagGroup<"non-literal-null-conversion">;
+ def NullConversion : DiagGroup<"null-conversion">;
+ def ImplicitConversionFloatingPointToBool :
+   DiagGroup<"implicit-conversion-floating-point-to-bool">;
+ def ObjCLiteralConversion : DiagGroup<"objc-literal-conversion">;
+ def MacroRedefined : DiagGroup<"macro-redefined">;
+ def BuiltinMacroRedefined : DiagGroup<"builtin-macro-redefined">;
+ def BuiltinRequiresHeader : DiagGroup<"builtin-requires-header">;
+ def C99Compat : DiagGroup<"c99-compat">;
+ def CXXCompat: DiagGroup<"c++-compat">;
+ def ExternCCompat : DiagGroup<"extern-c-compat">;
+ def KeywordCompat : DiagGroup<"keyword-compat">;
+ def GNUCaseRange : DiagGroup<"gnu-case-range">;
+ def CastAlign : DiagGroup<"cast-align">;
+ def CastQual : DiagGroup<"cast-qual">;
+ def : DiagGroup<"char-align">;
+ def Comment : DiagGroup<"comment">;
+ def GNUComplexInteger : DiagGroup<"gnu-complex-integer">;
+ def GNUConditionalOmittedOperand : DiagGroup<"gnu-conditional-omitted-operand">;
+ def ConfigMacros : DiagGroup<"config-macros">;
+ def : DiagGroup<"ctor-dtor-privacy">;
+ def GNUStringLiteralOperatorTemplate :
+   DiagGroup<"gnu-string-literal-operator-template">;
+ def UndefinedVarTemplate : DiagGroup<"undefined-var-template">;
+ def UndefinedFuncTemplate : DiagGroup<"undefined-func-template">;
+ def MissingNoEscape : DiagGroup<"missing-noescape">;
+ 
+ def DefaultedFunctionDeleted : DiagGroup<"defaulted-function-deleted">;
+ def DeleteIncomplete : DiagGroup<"delete-incomplete">;
+ def DeleteNonAbstractNonVirtualDtor : DiagGroup<"delete-non-abstract-non-virtual-dtor">;
+ def DeleteAbstractNonVirtualDtor : DiagGroup<"delete-abstract-non-virtual-dtor">;
+ def DeleteNonVirtualDtor : DiagGroup<"delete-non-virtual-dtor",
+                                      [DeleteNonAbstractNonVirtualDtor,
+                                       DeleteAbstractNonVirtualDtor]>;
+ def AbstractFinalClass : DiagGroup<"abstract-final-class">;
+ def FinalDtorNonFinalClass : DiagGroup<"final-dtor-non-final-class">;
+ 
+ def CXX11CompatDeprecatedWritableStr :
+   DiagGroup<"c++11-compat-deprecated-writable-strings">;
+ 
+ def DeprecatedArrayCompare : DiagGroup<"deprecated-array-compare">;
+ def DeprecatedAttributes : DiagGroup<"deprecated-attributes">;
+ def DeprecatedCommaSubscript : DiagGroup<"deprecated-comma-subscript">;
+ def DeprecatedCopyWithUserProvidedCopy : DiagGroup<"deprecated-copy-with-user-provided-copy">;
+ def DeprecatedCopyWithUserProvidedDtor : DiagGroup<"deprecated-copy-with-user-provided-dtor">;
+ def DeprecatedCopy : DiagGroup<"deprecated-copy", [DeprecatedCopyWithUserProvidedCopy]>;
+ def DeprecatedCopyWithDtor : DiagGroup<"deprecated-copy-with-dtor", [DeprecatedCopyWithUserProvidedDtor]>;
+ // For compatibility with GCC.
+ def : DiagGroup<"deprecated-copy-dtor", [DeprecatedCopyWithDtor]>;
+ def DeprecatedDeclarations : DiagGroup<"deprecated-declarations">;
+ def UnavailableDeclarations : DiagGroup<"unavailable-declarations">;
+ def UnguardedAvailabilityNew : DiagGroup<"unguarded-availability-new">;
+ def UnguardedAvailability : DiagGroup<"unguarded-availability",
+                                       [UnguardedAvailabilityNew]>;
+ // partial-availability is an alias of unguarded-availability.
+ def : DiagGroup<"partial-availability", [UnguardedAvailability]>;
+ def DeprecatedDynamicExceptionSpec
+     : DiagGroup<"deprecated-dynamic-exception-spec">;
+ def DeprecatedImplementations :DiagGroup<"deprecated-implementations">;
+ def DeprecatedIncrementBool : DiagGroup<"deprecated-increment-bool">;
+ def DeprecatedRegister : DiagGroup<"deprecated-register">;
+ def DeprecatedThisCapture : DiagGroup<"deprecated-this-capture">;
+ def DeprecatedVolatile : DiagGroup<"deprecated-volatile">;
+ def DeprecatedWritableStr : DiagGroup<"deprecated-writable-strings",
+                                       [CXX11CompatDeprecatedWritableStr]>;
+ def DeprecatedPragma : DiagGroup<"deprecated-pragma">;
+ // FIXME: Why is DeprecatedImplementations not in this group?
+ def Deprecated : DiagGroup<"deprecated", [DeprecatedAnonEnumEnumConversion,
+                                           DeprecatedArrayCompare,
+                                           DeprecatedAttributes,
+                                           DeprecatedCommaSubscript,
+                                           DeprecatedCopy,
+                                           DeprecatedCopyWithDtor,
+                                           DeprecatedDeclarations,
+                                           DeprecatedDynamicExceptionSpec,
+                                           DeprecatedEnumCompare,
+                                           DeprecatedEnumCompareConditional,
+                                           DeprecatedEnumEnumConversion,
+                                           DeprecatedEnumFloatConversion,
+                                           DeprecatedIncrementBool,
+                                           DeprecatedPragma,
+                                           DeprecatedRegister,
+                                           DeprecatedThisCapture,
+                                           DeprecatedVolatile,
+                                           DeprecatedWritableStr]>,
+                  DiagCategory<"Deprecations">;
+ 
+ def CXX20Designator : DiagGroup<"c++20-designator">;
+ // Allow -Wno-c99-designator to be used to turn off all warnings on valid C99
+ // designators (including the warning controlled by -Wc++20-designator).
+ def C99Designator : DiagGroup<"c99-designator", [CXX20Designator]>;
+ def GNUDesignator : DiagGroup<"gnu-designator">;
+ def DtorName : DiagGroup<"dtor-name">;
+ 
+ def DynamicExceptionSpec
+     : DiagGroup<"dynamic-exception-spec", [DeprecatedDynamicExceptionSpec]>;
+ 
+ def LibLTO : DiagGroup<"liblto">;
+ def : DiagGroup<"disabled-optimization">;
+ def : DiagGroup<"discard-qual">;
+ def DivZero : DiagGroup<"division-by-zero">;
+ def : DiagGroup<"div-by-zero", [DivZero]>;
+ 
+ def DocumentationHTML : DiagGroup<"documentation-html">;
+ def DocumentationUnknownCommand : DiagGroup<"documentation-unknown-command">;
+ def DocumentationPedantic : DiagGroup<"documentation-pedantic",
+                                       [DocumentationUnknownCommand]>;
+ def DocumentationDeprecatedSync : DiagGroup<"documentation-deprecated-sync">;
+ def Documentation : DiagGroup<"documentation",
+                               [DocumentationHTML,
+                                DocumentationDeprecatedSync]>;
+ 
+ def EmptyBody : DiagGroup<"empty-body">;
+ def Exceptions : DiagGroup<"exceptions">;
+ 
+ def GNUEmptyInitializer : DiagGroup<"gnu-empty-initializer">;
+ def GNUEmptyStruct : DiagGroup<"gnu-empty-struct">;
+ def ExtraTokens : DiagGroup<"extra-tokens">;
+ def CXX98CompatExtraSemi : DiagGroup<"c++98-compat-extra-semi">;
+ def CXX11ExtraSemi : DiagGroup<"c++11-extra-semi">;
+ def EmptyInitStatement : DiagGroup<"empty-init-stmt">;
+ def ExportUnnamed : DiagGroup<"export-unnamed">;
+ def ExtraSemiStmt : DiagGroup<"extra-semi-stmt", [EmptyInitStatement]>;
+ def ExtraSemi : DiagGroup<"extra-semi", [CXX98CompatExtraSemi,
+                                          CXX11ExtraSemi]>;
+ 
+ def GNUFlexibleArrayInitializer : DiagGroup<"gnu-flexible-array-initializer">;
+ def GNUFlexibleArrayUnionMember : DiagGroup<"gnu-flexible-array-union-member">;
+ def GNUFoldingConstant : DiagGroup<"gnu-folding-constant">;
+ def FormatInsufficientArgs : DiagGroup<"format-insufficient-args">;
+ def FormatExtraArgs : DiagGroup<"format-extra-args">;
+ def FormatZeroLength : DiagGroup<"format-zero-length">;
+ 
+ def InvalidIOSDeploymentTarget : DiagGroup<"invalid-ios-deployment-target">;
+ 
+ def CXX17CompatMangling : DiagGroup<"c++17-compat-mangling">;
+ def : DiagGroup<"c++1z-compat-mangling", [CXX17CompatMangling]>;
+ // Name of this warning in GCC.
+ def NoexceptType : DiagGroup<"noexcept-type", [CXX17CompatMangling]>;
+ 
+ // Warnings for C code which is not compatible with previous C standards.
+ def CPre2xCompat : DiagGroup<"pre-c2x-compat">;
+ def CPre2xCompatPedantic : DiagGroup<"pre-c2x-compat-pedantic",
+                                      [CPre2xCompat]>;
+ 
+ // Warnings for C++ code which is not compatible with previous C++ standards.
+ def CXXPre14Compat : DiagGroup<"pre-c++14-compat">;
+ def : DiagGroup<"c++98-c++11-compat", [CXXPre14Compat]>;
+ def CXXPre14CompatPedantic : DiagGroup<"pre-c++14-compat-pedantic",
+                                        [CXXPre14Compat,
+                                         CXXPre14CompatBinaryLiteral]>;
+ def : DiagGroup<"c++98-c++11-compat-pedantic", [CXXPre14CompatPedantic]>;
+ def CXXPre17Compat : DiagGroup<"pre-c++17-compat">;
+ def : DiagGroup<"c++98-c++11-c++14-compat", [CXXPre17Compat]>;
+ def CXXPre17CompatPedantic : DiagGroup<"pre-c++17-compat-pedantic",
+                                        [CXXPre17Compat]>;
+ def : DiagGroup<"c++98-c++11-c++14-compat-pedantic",
+                 [CXXPre17CompatPedantic]>;
+ def CXXPre20Compat : DiagGroup<"pre-c++20-compat">;
+ def : DiagGroup<"c++98-c++11-c++14-c++17-compat", [CXXPre20Compat]>;
+ def CXXPre20CompatPedantic : DiagGroup<"pre-c++20-compat-pedantic",
+                                        [CXXPre20Compat]>;
+ def : DiagGroup<"c++98-c++11-c++14-c++17-compat-pedantic",
+                 [CXXPre20CompatPedantic]>;
+ def CXXPre2bCompat : DiagGroup<"pre-c++2b-compat">;
+ def CXXPre2bCompatPedantic :
+   DiagGroup<"pre-c++2b-compat-pedantic", [CXXPre2bCompat]>;
+ 
+ def CXX98CompatBindToTemporaryCopy :
+   DiagGroup<"c++98-compat-bind-to-temporary-copy">;
+ def CXX98CompatLocalTypeTemplateArgs :
+   DiagGroup<"c++98-compat-local-type-template-args">;
+ def CXX98CompatUnnamedTypeTemplateArgs :
+   DiagGroup<"c++98-compat-unnamed-type-template-args">;
+ 
+ def CXX98Compat : DiagGroup<"c++98-compat",
+                             [CXX98CompatLocalTypeTemplateArgs,
+                              CXX98CompatUnnamedTypeTemplateArgs,
+                              CXXPre14Compat,
+                              CXXPre17Compat,
+                              CXXPre20Compat,
+                              CXXPre2bCompat]>;
+ // Warnings for C++11 features which are Extensions in C++98 mode.
+ def CXX98CompatPedantic : DiagGroup<"c++98-compat-pedantic",
+                                     [CXX98Compat,
+                                      CXX98CompatBindToTemporaryCopy,
+                                      CXX98CompatExtraSemi,
+                                      CXXPre14CompatPedantic,
+                                      CXXPre17CompatPedantic,
+                                      CXXPre20CompatPedantic,
+                                      CXXPre2bCompatPedantic]>;
+ 
+ def CXX11Narrowing : DiagGroup<"c++11-narrowing">;
+ 
+ def CXX11WarnInconsistentOverrideDestructor :
+   DiagGroup<"inconsistent-missing-destructor-override">;
+ def CXX11WarnInconsistentOverrideMethod :
+   DiagGroup<"inconsistent-missing-override">;
+ def CXX11WarnSuggestOverrideDestructor : DiagGroup<"suggest-destructor-override">;
+ def CXX11WarnSuggestOverride : DiagGroup<"suggest-override">;
+ 
+ // Original name of this warning in Clang
+ def : DiagGroup<"c++0x-narrowing", [CXX11Narrowing]>;
+ 
+ // Name of this warning in GCC
+ def : DiagGroup<"narrowing", [CXX11Narrowing]>;
+ 
+ def CXX11CompatReservedUserDefinedLiteral :
+   DiagGroup<"c++11-compat-reserved-user-defined-literal">;
+ def ReservedUserDefinedLiteral :
+   DiagGroup<"reserved-user-defined-literal",
+             [CXX11CompatReservedUserDefinedLiteral]>;
+ 
+ def CXX11Compat : DiagGroup<"c++11-compat",
+                             [CXX11Narrowing,
+                              CXX11CompatReservedUserDefinedLiteral,
+                              CXX11CompatDeprecatedWritableStr,
+                              CXXPre14Compat,
+                              CXXPre17Compat,
+                              CXXPre20Compat,
+                              CXXPre2bCompat]>;
+ def : DiagGroup<"c++0x-compat", [CXX11Compat]>;
+ def CXX11CompatPedantic : DiagGroup<"c++11-compat-pedantic",
+                                     [CXX11Compat,
+                                      CXXPre14CompatPedantic,
+                                      CXXPre17CompatPedantic,
+                                      CXXPre20CompatPedantic,
+                                      CXXPre2bCompatPedantic]>;
+ 
+ def CXX14Compat : DiagGroup<"c++14-compat", [CXXPre17Compat,
+                                              CXXPre20Compat,
+                                              CXXPre2bCompat]>;
+ def CXX14CompatPedantic : DiagGroup<"c++14-compat-pedantic",
+                                     [CXX14Compat,
+                                      CXXPre17CompatPedantic,
+                                      CXXPre20CompatPedantic,
+                                      CXXPre2bCompatPedantic]>;
+ 
+ def CXX17Compat : DiagGroup<"c++17-compat", [DeprecatedRegister,
+                                              DeprecatedIncrementBool,
+                                              CXX17CompatMangling,
+                                              CXXPre20Compat,
+                                              CXXPre2bCompat]>;
+ def CXX17CompatPedantic : DiagGroup<"c++17-compat-pedantic",
+                                     [CXX17Compat,
+                                      CXXPre20CompatPedantic,
+                                      CXXPre2bCompatPedantic]>;
+ def : DiagGroup<"c++1z-compat", [CXX17Compat]>;
+ 
+ def CXX20Compat : DiagGroup<"c++20-compat", [CXXPre2bCompat]>;
+ def CXX20CompatPedantic : DiagGroup<"c++20-compat-pedantic",
+                                     [CXX20Compat,
+                                      CXXPre2bCompatPedantic]>;
+ def : DiagGroup<"c++2a-compat", [CXX20Compat]>;
+ def : DiagGroup<"c++2a-compat-pedantic", [CXX20CompatPedantic]>;
+ 
+ def ExitTimeDestructors : DiagGroup<"exit-time-destructors">;
+ def FlexibleArrayExtensions : DiagGroup<"flexible-array-extensions">;
+ def FourByteMultiChar : DiagGroup<"four-char-constants">;
+ def GlobalConstructors : DiagGroup<"global-constructors">;
+ def BitwiseConditionalParentheses: DiagGroup<"bitwise-conditional-parentheses">;
+ def BitwiseOpParentheses: DiagGroup<"bitwise-op-parentheses">;
+ def LogicalOpParentheses: DiagGroup<"logical-op-parentheses">;
+ def LogicalNotParentheses: DiagGroup<"logical-not-parentheses">;
+ def ShiftOpParentheses: DiagGroup<"shift-op-parentheses">;
+ def OverloadedShiftOpParentheses: DiagGroup<"overloaded-shift-op-parentheses">;
+ def DanglingElse: DiagGroup<"dangling-else">;
+ def DanglingField : DiagGroup<"dangling-field">;
+ def DanglingInitializerList : DiagGroup<"dangling-initializer-list">;
+ def DanglingGsl : DiagGroup<"dangling-gsl">;
+ def ReturnStackAddress : DiagGroup<"return-stack-address">;
+ def Dangling : DiagGroup<"dangling", [DanglingField,
+                                       DanglingInitializerList,
+                                       DanglingGsl,
+                                       ReturnStackAddress]>;
+ def DistributedObjectModifiers : DiagGroup<"distributed-object-modifiers">;
+ def ExcessInitializers : DiagGroup<"excess-initializers">;
+ def ExpansionToDefined : DiagGroup<"expansion-to-defined">;
+ def FlagEnum : DiagGroup<"flag-enum">;
+ def IncrementBool : DiagGroup<"increment-bool", [DeprecatedIncrementBool]>;
+ def InfiniteRecursion : DiagGroup<"infinite-recursion">;
+ def PureVirtualCallFromCtorDtor: DiagGroup<"call-to-pure-virtual-from-ctor-dtor">;
+ def GNUImaginaryConstant : DiagGroup<"gnu-imaginary-constant">;
+ def IgnoredReferenceQualifiers : DiagGroup<"ignored-reference-qualifiers">;
+ def IgnoredQualifiers : DiagGroup<"ignored-qualifiers", [IgnoredReferenceQualifiers]>;
+ def : DiagGroup<"import">;
+ def GNUIncludeNext : DiagGroup<"gnu-include-next">;
+ def IncompatibleMSStruct : DiagGroup<"incompatible-ms-struct">;
+ def IncompatiblePointerTypesDiscardsQualifiers
+   : DiagGroup<"incompatible-pointer-types-discards-qualifiers">;
+ def IncompatibleFunctionPointerTypes
+   : DiagGroup<"incompatible-function-pointer-types">;
+ def IncompatiblePointerTypes
+   : DiagGroup<"incompatible-pointer-types",
+     [IncompatiblePointerTypesDiscardsQualifiers,
+      IncompatibleFunctionPointerTypes]>;
+ def IncompleteUmbrella : DiagGroup<"incomplete-umbrella">;
+ def IncompleteFrameworkModuleDeclaration
+   : DiagGroup<"incomplete-framework-module-declaration">;
+ def NonModularIncludeInFrameworkModule
+   : DiagGroup<"non-modular-include-in-framework-module">;
+ def NonModularIncludeInModule : DiagGroup<"non-modular-include-in-module",
+                                           [NonModularIncludeInFrameworkModule]>;
+ def IncompleteModule : DiagGroup<"incomplete-module",
+     [IncompleteUmbrella, NonModularIncludeInModule]>;
+ def PrivateModule : DiagGroup<"private-module">;
+ 
+ def CXX11InlineNamespace : DiagGroup<"c++11-inline-namespace">;
+ def InlineNamespaceReopenedNoninline
+     : DiagGroup<"inline-namespace-reopened-noninline">;
+ def InvalidNoreturn : DiagGroup<"invalid-noreturn">;
+ def InvalidSourceEncoding : DiagGroup<"invalid-source-encoding">;
+ def KNRPromotedParameter : DiagGroup<"knr-promoted-parameter">;
+ def : DiagGroup<"init-self">;
+ def : DiagGroup<"inline">;
+ def : DiagGroup<"invalid-pch">;
+ def GNULabelsAsValue : DiagGroup<"gnu-label-as-value">;
+ def LiteralRange : DiagGroup<"literal-range">;
+ def LocalTypeTemplateArgs : DiagGroup<"local-type-template-args",
+                                       [CXX98CompatLocalTypeTemplateArgs]>;
+ def RangeLoopConstruct : DiagGroup<"range-loop-construct">;
+ def RangeLoopBindReference : DiagGroup<"range-loop-bind-reference">;
+ def RangeLoopAnalysis : DiagGroup<"range-loop-analysis",
+                                   [RangeLoopConstruct, RangeLoopBindReference]>;
+ def ForLoopAnalysis : DiagGroup<"for-loop-analysis">;
+ def LoopAnalysis : DiagGroup<"loop-analysis", [ForLoopAnalysis,
+                                                RangeLoopAnalysis]>;
+ def MalformedWarningCheck : DiagGroup<"malformed-warning-check">;
+ def Main : DiagGroup<"main">;
+ def MainReturnType : DiagGroup<"main-return-type">;
+ def MaxUnsignedZero : DiagGroup<"max-unsigned-zero">;
+ def MissingBraces : DiagGroup<"missing-braces">;
+ def MissingDeclarations: DiagGroup<"missing-declarations">;
+ def : DiagGroup<"missing-format-attribute">;
+ def : DiagGroup<"missing-include-dirs">;
+ def MissingNoreturn : DiagGroup<"missing-noreturn">;
+ def MultiChar : DiagGroup<"multichar">;
+ def : DiagGroup<"nested-externs">;
+ def CXX11LongLong : DiagGroup<"c++11-long-long">;
+ def LongLong : DiagGroup<"long-long", [CXX11LongLong]>;
+ def ImplicitlyUnsignedLiteral : DiagGroup<"implicitly-unsigned-literal">;
+ def MethodSignatures : DiagGroup<"method-signatures">;
+ def MismatchedParameterTypes : DiagGroup<"mismatched-parameter-types">;
+ def MismatchedReturnTypes : DiagGroup<"mismatched-return-types">;
+ def MismatchedTags : DiagGroup<"mismatched-tags">;
+ def MissingFieldInitializers : DiagGroup<"missing-field-initializers">;
+ def ModuleLock : DiagGroup<"module-lock">;
+ def ModuleBuild : DiagGroup<"module-build">;
+ def ModuleImport : DiagGroup<"module-import">;
+ def ModuleConflict : DiagGroup<"module-conflict">;
+ def ModuleFileExtension : DiagGroup<"module-file-extension">;
+ def RoundTripCC1Args : DiagGroup<"round-trip-cc1-args">;
+ def NewlineEOF : DiagGroup<"newline-eof">;
+ def Nullability : DiagGroup<"nullability">;
+ def NullabilityDeclSpec : DiagGroup<"nullability-declspec">;
+ def NullabilityInferredOnNestedType : DiagGroup<"nullability-inferred-on-nested-type">;
+ def NullableToNonNullConversion : DiagGroup<"nullable-to-nonnull-conversion">;
+ def NullabilityCompletenessOnArrays : DiagGroup<"nullability-completeness-on-arrays">;
+ def NullabilityCompleteness : DiagGroup<"nullability-completeness",
+                                         [NullabilityCompletenessOnArrays]>;
+ def NullArithmetic : DiagGroup<"null-arithmetic">;
+ def NullCharacter : DiagGroup<"null-character">;
+ def NullDereference : DiagGroup<"null-dereference">;
+ def InitializerOverrides : DiagGroup<"initializer-overrides">;
+ // For compatibility with GCC; -Woverride-init = -Winitializer-overrides
+ def : DiagGroup<"override-init", [InitializerOverrides]>;
+ def NonNull : DiagGroup<"nonnull">;
+ def NonPODVarargs : DiagGroup<"non-pod-varargs">;
+ def ClassVarargs : DiagGroup<"class-varargs", [NonPODVarargs]>;
+ def : DiagGroup<"nonportable-cfstrings">;
+ def NonVirtualDtor : DiagGroup<"non-virtual-dtor">;
+ def NullPointerArithmetic : DiagGroup<"null-pointer-arithmetic">;
+ def NullPointerSubtraction : DiagGroup<"null-pointer-subtraction">;
+ def : DiagGroup<"effc++", [NonVirtualDtor]>;
+ def OveralignedType : DiagGroup<"over-aligned">;
+ def OldStyleCast : DiagGroup<"old-style-cast">;
+ def : DiagGroup<"old-style-definition">;
+ def OutOfLineDeclaration : DiagGroup<"out-of-line-declaration">;
+ def : DiagGroup<"overflow">;
+ def ForwardClassReceiver : DiagGroup<"receiver-forward-class">;
+ def MethodAccess : DiagGroup<"objc-method-access">;
+ def ObjCReceiver : DiagGroup<"receiver-expr">;
+ def OperatorNewReturnsNull : DiagGroup<"new-returns-null">;
+ def OverlengthStrings : DiagGroup<"overlength-strings">;
+ def OverloadedVirtual : DiagGroup<"overloaded-virtual">;
+ def PrivateExtern : DiagGroup<"private-extern">;
+ def SelTypeCast : DiagGroup<"cast-of-sel-type">;
+ def FunctionDefInObjCContainer : DiagGroup<"function-def-in-objc-container">;
+ def BadFunctionCast : DiagGroup<"bad-function-cast">;
+ def CastFunctionType : DiagGroup<"cast-function-type">;
+ def ObjCPropertyImpl : DiagGroup<"objc-property-implementation">;
+ def ObjCPropertyNoAttribute : DiagGroup<"objc-property-no-attribute">;
+ def ObjCPropertyAssignOnObjectType : DiagGroup<"objc-property-assign-on-object-type">;
+ def ObjCProtocolQualifiers : DiagGroup<"objc-protocol-qualifiers">;
+ def ObjCMissingSuperCalls : DiagGroup<"objc-missing-super-calls">;
+ def ObjCDesignatedInit : DiagGroup<"objc-designated-initializers">;
+ def ObjCRetainBlockProperty : DiagGroup<"objc-noncopy-retain-block-property">;
+ def ObjCReadonlyPropertyHasSetter : DiagGroup<"objc-readonly-with-setter-property">;
+ def ObjCInvalidIBOutletProperty : DiagGroup<"invalid-iboutlet">;
+ def ObjCRootClass : DiagGroup<"objc-root-class">;
+ def ObjCPointerIntrospectPerformSelector : DiagGroup<"deprecated-objc-pointer-introspection-performSelector">;
+ def ObjCPointerIntrospect : DiagGroup<"deprecated-objc-pointer-introspection", [ObjCPointerIntrospectPerformSelector]>;
+ def ObjCMultipleMethodNames : DiagGroup<"objc-multiple-method-names">;
+ def ObjCFlexibleArray : DiagGroup<"objc-flexible-array">;
+ def ObjCBoxing : DiagGroup<"objc-boxing">;
+ def CompletionHandler : DiagGroup<"completion-handler">;
+ def CalledOnceParameter : DiagGroup<"called-once-parameter", [CompletionHandler]>;
+ def OpenCLUnsupportedRGBA: DiagGroup<"opencl-unsupported-rgba">;
+ def UnderalignedExceptionObject : DiagGroup<"underaligned-exception-object">;
+ def DeprecatedObjCIsaUsage : DiagGroup<"deprecated-objc-isa-usage">;
+ def ExplicitInitializeCall : DiagGroup<"explicit-initialize-call">;
+ def OrderedCompareFunctionPointers : DiagGroup<"ordered-compare-function-pointers">;
+ def Packed : DiagGroup<"packed">;
+ def Padded : DiagGroup<"padded">;
+ 
+ def PessimizingMove : DiagGroup<"pessimizing-move">;
+ def ReturnStdMove : DiagGroup<"return-std-move">;
+ 
+ def PointerArith : DiagGroup<"pointer-arith">;
+ def PoundWarning : DiagGroup<"#warnings">;
+ def PoundPragmaMessage : DiagGroup<"#pragma-messages">,
+                          DiagCategory<"#pragma message Directive">;
+ def : DiagGroup<"redundant-decls">;
+ def RedeclaredClassMember : DiagGroup<"redeclared-class-member">;
+ def GNURedeclaredEnum : DiagGroup<"gnu-redeclared-enum">;
+ def RedundantMove : DiagGroup<"redundant-move">;
+ def Register : DiagGroup<"register", [DeprecatedRegister]>;
+ def ReturnTypeCLinkage : DiagGroup<"return-type-c-linkage">;
+ def ReturnType : DiagGroup<"return-type", [ReturnTypeCLinkage]>;
+ def BindToTemporaryCopy : DiagGroup<"bind-to-temporary-copy",
+                                     [CXX98CompatBindToTemporaryCopy]>;
+ def SelfAssignmentField : DiagGroup<"self-assign-field">;
+ def SelfAssignmentOverloaded : DiagGroup<"self-assign-overloaded">;
+ def SelfAssignment : DiagGroup<"self-assign", [SelfAssignmentOverloaded, SelfAssignmentField]>;
+ def SelfMove : DiagGroup<"self-move">;
+ def SemiBeforeMethodBody : DiagGroup<"semicolon-before-method-body">;
+ def Sentinel : DiagGroup<"sentinel">;
+ def MissingMethodReturnType : DiagGroup<"missing-method-return-type">;
+ 
+ def ShadowField : DiagGroup<"shadow-field">;
+ def ShadowFieldInConstructorModified : DiagGroup<"shadow-field-in-constructor-modified">;
+ def ShadowFieldInConstructor : DiagGroup<"shadow-field-in-constructor",
+                                          [ShadowFieldInConstructorModified]>;
+ def ShadowIvar : DiagGroup<"shadow-ivar">;
+ def ShadowUncapturedLocal : DiagGroup<"shadow-uncaptured-local">;
+ 
+ // -Wshadow-all is a catch-all for all shadowing. -Wshadow is just the
+ // shadowing that we think is unsafe.
+ def Shadow : DiagGroup<"shadow", [ShadowFieldInConstructorModified,
+                                   ShadowIvar]>;
+ def ShadowAll : DiagGroup<"shadow-all", [Shadow, ShadowFieldInConstructor,
+                                          ShadowUncapturedLocal, ShadowField]>;
+ 
+ def Shorten64To32 : DiagGroup<"shorten-64-to-32">;
+ def : DiagGroup<"sign-promo">;
+ def SignCompare : DiagGroup<"sign-compare">;
+ def : DiagGroup<"switch-default">;
+ def : DiagGroup<"synth">;
+ def SizeofArrayArgument : DiagGroup<"sizeof-array-argument">;
+ def SizeofArrayDecay : DiagGroup<"sizeof-array-decay">;
+ def SizeofPointerMemaccess : DiagGroup<"sizeof-pointer-memaccess">;
+ def MemsetTransposedArgs : DiagGroup<"memset-transposed-args">;
+ def DynamicClassMemaccess : DiagGroup<"dynamic-class-memaccess">;
+ def NonTrivialMemaccess : DiagGroup<"nontrivial-memaccess">;
+ def SuspiciousBzero : DiagGroup<"suspicious-bzero">;
+ def SuspiciousMemaccess : DiagGroup<"suspicious-memaccess",
+   [SizeofPointerMemaccess, DynamicClassMemaccess,
+    NonTrivialMemaccess, MemsetTransposedArgs, SuspiciousBzero]>;
+ def StaticInInline : DiagGroup<"static-in-inline">;
+ def StaticLocalInInline : DiagGroup<"static-local-in-inline">;
+ def GNUStaticFloatInit : DiagGroup<"gnu-static-float-init">;
+ def StaticFloatInit : DiagGroup<"static-float-init", [GNUStaticFloatInit]>;
+ def GNUStatementExpression : DiagGroup<"gnu-statement-expression">;
+ def StringConcatation : DiagGroup<"string-concatenation">;
+ def StringCompare : DiagGroup<"string-compare">;
+ def StringPlusInt : DiagGroup<"string-plus-int">;
+ def StringPlusChar : DiagGroup<"string-plus-char">;
+ def StrncatSize : DiagGroup<"strncat-size">;
+ def SwiftNameAttribute : DiagGroup<"swift-name-attribute">;
+ def IntInBoolContext : DiagGroup<"int-in-bool-context">;
+ def TautologicalTypeLimitCompare : DiagGroup<"tautological-type-limit-compare">;
+ def TautologicalUnsignedZeroCompare : DiagGroup<"tautological-unsigned-zero-compare">;
+ def TautologicalUnsignedCharZeroCompare : DiagGroup<"tautological-unsigned-char-zero-compare">;
+ def TautologicalUnsignedEnumZeroCompare : DiagGroup<"tautological-unsigned-enum-zero-compare">;
+ // For compatibility with GCC. Tautological comparison warnings for constants
+ // that are an extremal value of the type.
+ def TypeLimits : DiagGroup<"type-limits", [TautologicalTypeLimitCompare,
+                                            TautologicalUnsignedZeroCompare,
+                                            TautologicalUnsignedCharZeroCompare,
+                                            TautologicalUnsignedEnumZeroCompare]>;
+ // Additional tautological comparison warnings based on the expression, not
+ // only on its type.
+ def TautologicalValueRangeCompare : DiagGroup<"tautological-value-range-compare">;
+ def TautologicalInRangeCompare : DiagGroup<"tautological-constant-in-range-compare",
+                                            [TypeLimits, TautologicalValueRangeCompare]>;
+ def TautologicalOutOfRangeCompare : DiagGroup<"tautological-constant-out-of-range-compare">;
+ def TautologicalConstantCompare : DiagGroup<"tautological-constant-compare",
+                                             [TautologicalOutOfRangeCompare]>;
+ def TautologicalPointerCompare : DiagGroup<"tautological-pointer-compare">;
+ def TautologicalOverlapCompare : DiagGroup<"tautological-overlap-compare">;
+ def TautologicalBitwiseCompare : DiagGroup<"tautological-bitwise-compare">;
+ def TautologicalUndefinedCompare : DiagGroup<"tautological-undefined-compare">;
+ def TautologicalObjCBoolCompare : DiagGroup<"tautological-objc-bool-compare">;
+ def TautologicalCompare : DiagGroup<"tautological-compare",
+                                     [TautologicalConstantCompare,
+                                      TautologicalPointerCompare,
+                                      TautologicalOverlapCompare,
+                                      TautologicalBitwiseCompare,
+                                      TautologicalUndefinedCompare,
+                                      TautologicalObjCBoolCompare]>;
+ def HeaderHygiene : DiagGroup<"header-hygiene">;
+ def DuplicateDeclSpecifier : DiagGroup<"duplicate-decl-specifier">;
+ def CompareDistinctPointerType : DiagGroup<"compare-distinct-pointer-types">;
+ def GNUUnionCast : DiagGroup<"gnu-union-cast">;
+ def GNUVariableSizedTypeNotAtEnd : DiagGroup<"gnu-variable-sized-type-not-at-end">;
+ def Varargs : DiagGroup<"varargs">;
+ def XorUsedAsPow : DiagGroup<"xor-used-as-pow">;
+ 
+ def Unsequenced : DiagGroup<"unsequenced">;
+ // GCC name for -Wunsequenced
+ def : DiagGroup<"sequence-point", [Unsequenced]>;
+ 
+ // Preprocessor warnings.
+ def AmbiguousMacro : DiagGroup<"ambiguous-macro">;
+ def KeywordAsMacro : DiagGroup<"keyword-macro">;
+ def ReservedIdAsMacro : DiagGroup<"reserved-macro-identifier">;
+ def ReservedIdAsMacroAlias : DiagGroup<"reserved-id-macro", [ReservedIdAsMacro]>;
+ def RestrictExpansionMacro : DiagGroup<"restrict-expansion">;
+ 
+ // Just silence warnings about -Wstrict-aliasing for now.
+ def : DiagGroup<"strict-aliasing=0">;
+ def : DiagGroup<"strict-aliasing=1">;
+ def : DiagGroup<"strict-aliasing=2">;
+ def : DiagGroup<"strict-aliasing">;
+ 
+ // Just silence warnings about -Wstrict-overflow for now.
+ def : DiagGroup<"strict-overflow=0">;
+ def : DiagGroup<"strict-overflow=1">;
+ def : DiagGroup<"strict-overflow=2">;
+ def : DiagGroup<"strict-overflow=3">;
+ def : DiagGroup<"strict-overflow=4">;
+ def : DiagGroup<"strict-overflow=5">;
+ def : DiagGroup<"strict-overflow">;
+ 
+ def InvalidOffsetof : DiagGroup<"invalid-offsetof">;
+ def StrictSelector : DiagGroup<"strict-selector-match">;
+ def MethodDuplicate : DiagGroup<"duplicate-method-match">;
+ def ObjCCStringFormat : DiagGroup<"cstring-format-directive">;
+ def CoveredSwitchDefault : DiagGroup<"covered-switch-default">;
+ def SwitchBool     : DiagGroup<"switch-bool">;
+ def SwitchEnum     : DiagGroup<"switch-enum">;
+ def Switch         : DiagGroup<"switch">;
+ def ImplicitFallthroughPerFunction :
+   DiagGroup<"implicit-fallthrough-per-function">;
+ def ImplicitFallthrough  : DiagGroup<"implicit-fallthrough",
+                                      [ImplicitFallthroughPerFunction]>;
+ def InvalidPPToken : DiagGroup<"invalid-pp-token">;
+ def Trigraphs      : DiagGroup<"trigraphs">;
+ 
+ def UndefinedReinterpretCast : DiagGroup<"undefined-reinterpret-cast">;
+ def ReinterpretBaseClass : DiagGroup<"reinterpret-base-class">;
+ def Unicode  : DiagGroup<"unicode">;
+ def UninitializedMaybe : DiagGroup<"conditional-uninitialized">;
+ def UninitializedSometimes : DiagGroup<"sometimes-uninitialized">;
+ def UninitializedStaticSelfInit : DiagGroup<"static-self-init">;
+ def UninitializedConstReference : DiagGroup<"uninitialized-const-reference">;
+ def Uninitialized  : DiagGroup<"uninitialized", [UninitializedSometimes,
+                                                  UninitializedStaticSelfInit,
+                                                  UninitializedConstReference]>;
+ def IgnoredPragmaIntrinsic : DiagGroup<"ignored-pragma-intrinsic">;
+ // #pragma optimize is often used to avoid to work around MSVC codegen bugs or
+ // to disable inlining. It's not completely clear what alternative to suggest
+ // (#pragma clang optimize, noinline) so suggest nothing for now.
+ def IgnoredPragmaOptimize : DiagGroup<"ignored-pragma-optimize">;
+ def UnknownPragmas : DiagGroup<"unknown-pragmas">;
+ def IgnoredPragmas : DiagGroup<"ignored-pragmas",
+     [IgnoredPragmaIntrinsic, IgnoredPragmaOptimize]>;
+ def PragmaClangAttribute : DiagGroup<"pragma-clang-attribute">;
+ def PragmaPackSuspiciousInclude : DiagGroup<"pragma-pack-suspicious-include">;
+ def PragmaPack : DiagGroup<"pragma-pack", [PragmaPackSuspiciousInclude]>;
+ def Pragmas : DiagGroup<"pragmas", [UnknownPragmas, IgnoredPragmas,
+                                     PragmaClangAttribute, PragmaPack]>;
+ def UnknownWarningOption : DiagGroup<"unknown-warning-option">;
+ def NSobjectAttribute : DiagGroup<"NSObject-attribute">;
+ def NSConsumedMismatch : DiagGroup<"nsconsumed-mismatch">;
+ def NSReturnsMismatch : DiagGroup<"nsreturns-mismatch">;
+ 
+ def IndependentClassAttribute : DiagGroup<"IndependentClass-attribute">;
+ def UnknownAttributes : DiagGroup<"unknown-attributes">;
+ def IgnoredAttributes : DiagGroup<"ignored-attributes">;
+ def Attributes : DiagGroup<"attributes", [UnknownAttributes,
+                                           IgnoredAttributes]>;
+ def UnknownSanitizers : DiagGroup<"unknown-sanitizers">;
+ def UnnamedTypeTemplateArgs : DiagGroup<"unnamed-type-template-args",
+                                         [CXX98CompatUnnamedTypeTemplateArgs]>;
+ def UnsupportedFriend : DiagGroup<"unsupported-friend">;
+ def UnusedArgument : DiagGroup<"unused-argument">;
+ def UnusedCommandLineArgument : DiagGroup<"unused-command-line-argument">;
+ def IgnoredOptimizationArgument : DiagGroup<"ignored-optimization-argument">;
+ def InvalidCommandLineArgument : DiagGroup<"invalid-command-line-argument",
+                                            [IgnoredOptimizationArgument]>;
+ def UnusedComparison : DiagGroup<"unused-comparison">;
+ def UnusedExceptionParameter : DiagGroup<"unused-exception-parameter">;
+ def UnneededInternalDecl : DiagGroup<"unneeded-internal-declaration">;
+ def UnneededMemberFunction : DiagGroup<"unneeded-member-function">;
+ def UnusedPrivateField : DiagGroup<"unused-private-field">;
+ def UnusedFunction : DiagGroup<"unused-function", [UnneededInternalDecl]>;
+ def UnusedTemplate : DiagGroup<"unused-template", [UnneededInternalDecl]>;
+ def UnusedMemberFunction : DiagGroup<"unused-member-function",
+                                      [UnneededMemberFunction]>;
+ def UnusedLabel : DiagGroup<"unused-label">;
+ def UnusedLambdaCapture : DiagGroup<"unused-lambda-capture">;
+ def UnusedParameter : DiagGroup<"unused-parameter">;
+ def UnusedButSetParameter : DiagGroup<"unused-but-set-parameter">;
+ def UnusedResult : DiagGroup<"unused-result">;
+ def PotentiallyEvaluatedExpression : DiagGroup<"potentially-evaluated-expression">;
+ def UnevaluatedExpression : DiagGroup<"unevaluated-expression",
+                                       [PotentiallyEvaluatedExpression]>;
+ def UnusedValue : DiagGroup<"unused-value", [UnusedComparison, UnusedResult,
+                                              UnevaluatedExpression]>;
+ def UnusedConstVariable : DiagGroup<"unused-const-variable">;
+ def UnusedVariable : DiagGroup<"unused-variable",
+                                [UnusedConstVariable]>;
+ def UnusedButSetVariable : DiagGroup<"unused-but-set-variable">;
+ def UnusedLocalTypedef : DiagGroup<"unused-local-typedef">;
+ def UnusedPropertyIvar :  DiagGroup<"unused-property-ivar">;
+ def UnusedGetterReturnValue : DiagGroup<"unused-getter-return-value">;
+ def UsedButMarkedUnused : DiagGroup<"used-but-marked-unused">;
+ def UserDefinedLiterals : DiagGroup<"user-defined-literals">;
+ def UserDefinedWarnings : DiagGroup<"user-defined-warnings">;
+ def ReorderCtor : DiagGroup<"reorder-ctor">;
+ def ReorderInitList : DiagGroup<"reorder-init-list">;
+ def Reorder : DiagGroup<"reorder", [ReorderCtor, ReorderInitList]>;
+ def UndeclaredSelector : DiagGroup<"undeclared-selector">;
+ def ImplicitAtomic : DiagGroup<"implicit-atomic-properties">;
+ def AtomicAlignment : DiagGroup<"atomic-alignment">;
+ def CustomAtomic : DiagGroup<"custom-atomic-properties">;
+ def AtomicProperties : DiagGroup<"atomic-properties",
+                                  [ImplicitAtomic, CustomAtomic]>;
+ def ARCUnsafeRetainedAssign : DiagGroup<"arc-unsafe-retained-assign">;
+ def ARCRetainCycles : DiagGroup<"arc-retain-cycles">;
+ def ARCNonPodMemAccess : DiagGroup<"arc-non-pod-memaccess">;
+ def AutomaticReferenceCounting : DiagGroup<"arc",
+                                            [ARCUnsafeRetainedAssign,
+                                             ARCRetainCycles,
+                                             ARCNonPodMemAccess]>;
+ def ARCRepeatedUseOfWeakMaybe : DiagGroup<"arc-maybe-repeated-use-of-weak">;
+ def ARCRepeatedUseOfWeak : DiagGroup<"arc-repeated-use-of-weak",
+                                      [ARCRepeatedUseOfWeakMaybe]>;
+ def BlockCaptureAutoReleasing : DiagGroup<"block-capture-autoreleasing">;
+ def ObjCBridge : DiagGroup<"bridge-cast">;
+ 
+ def DeallocInCategory:DiagGroup<"dealloc-in-category">;
+ def SelectorTypeMismatch : DiagGroup<"selector-type-mismatch">;
+ def Selector : DiagGroup<"selector", [SelectorTypeMismatch]>;
+ def Protocol : DiagGroup<"protocol">;
+ // No longer in use, preserve for backwards compatibility.
+ def : DiagGroup<"at-protocol">;
+ def PropertyAccessDotSyntax: DiagGroup<"property-access-dot-syntax">;
+ def PropertyAttr : DiagGroup<"property-attribute-mismatch">;
+ def SuperSubClassMismatch : DiagGroup<"super-class-method-mismatch">;
+ def OverridingMethodMismatch : DiagGroup<"overriding-method-mismatch">;
+ def VariadicMacros : DiagGroup<"variadic-macros">;
+ def VectorConversion : DiagGroup<"vector-conversion">;      // clang specific
+ def VexingParse : DiagGroup<"vexing-parse">;
+ def VLAExtension : DiagGroup<"vla-extension">;
+ def VLA : DiagGroup<"vla", [VLAExtension]>;
+ def VolatileRegisterVar : DiagGroup<"volatile-register-var">;
+ def Visibility : DiagGroup<"visibility">;
+ def ZeroLengthArray : DiagGroup<"zero-length-array">;
+ def GNUZeroLineDirective : DiagGroup<"gnu-zero-line-directive">;
+ def GNUZeroVariadicMacroArguments : DiagGroup<"gnu-zero-variadic-macro-arguments">;
+ def MisleadingIndentation : DiagGroup<"misleading-indentation">;
+ 
+ // This covers both the deprecated case (in C++98)
+ // and the extension case (in C++11 onwards).
+ def WritableStrings : DiagGroup<"writable-strings", [DeprecatedWritableStr]>;
+ 
+ // GCC calls -Wdeprecated-writable-strings -Wwrite-strings.
+ //
+ // Bizarrely, this warning flag enables -fconst-strings in C. This is
+ // GCC-compatible, but really weird.
+ //
+ // FIXME: Should this affect C++11 (where this is an error,
+ //        not just deprecated) or not?
+ def GCCWriteStrings : DiagGroup<"write-strings" , [WritableStrings]>;
+ 
+ def CharSubscript : DiagGroup<"char-subscripts">;
+ def LargeByValueCopy : DiagGroup<"large-by-value-copy">;
+ def DuplicateArgDecl : DiagGroup<"duplicate-method-arg">;
+ def SignedEnumBitfield : DiagGroup<"signed-enum-bitfield">;
+ 
+ def ReservedIdentifier : DiagGroup<"reserved-identifier",
+     [ReservedIdAsMacro]>;
+ 
+ // Unreachable code warning groups.
+ //
+ //  The goal is make -Wunreachable-code on by default, in -Wall, or at
+ //  least actively used, with more noisy versions of the warning covered
+ //  under separate flags.
+ //
+ def UnreachableCodeLoopIncrement : DiagGroup<"unreachable-code-loop-increment">;
+ def UnreachableCodeFallthrough : DiagGroup<"unreachable-code-fallthrough">;
+ def UnreachableCode : DiagGroup<"unreachable-code",
+                                 [UnreachableCodeLoopIncrement,
+                                  UnreachableCodeFallthrough]>;
+ def UnreachableCodeBreak : DiagGroup<"unreachable-code-break">;
+ def UnreachableCodeReturn : DiagGroup<"unreachable-code-return">;
+ def UnreachableCodeAggressive : DiagGroup<"unreachable-code-aggressive",
+                                     [UnreachableCode,
+                                      UnreachableCodeBreak,
+                                      UnreachableCodeReturn]>;
+ 
+ // Aggregation warning settings.
+ 
+ // Populate -Waddress with warnings from other groups.
+ def : DiagGroup<"address", [PointerBoolConversion,
+                             StringCompare,
+                             TautologicalPointerCompare]>;
+ 
+ // -Widiomatic-parentheses contains warnings about 'idiomatic'
+ // missing parentheses;  it is off by default.  We do not include it
+ // in -Wparentheses because most users who use -Wparentheses explicitly
+ // do not want these warnings.
+ def ParenthesesOnEquality : DiagGroup<"parentheses-equality">;
+ def Parentheses : DiagGroup<"parentheses",
+                             [LogicalOpParentheses,
+                              LogicalNotParentheses,
+                              BitwiseConditionalParentheses,
+                              BitwiseOpParentheses,
+                              ShiftOpParentheses,
+                              OverloadedShiftOpParentheses,
+                              ParenthesesOnEquality,
+                              DanglingElse]>;
+ 
+ // -Wconversion has its own warnings, but we split a few out for
+ // legacy reasons:
+ //   - some people want just 64-to-32 warnings
+ //   - conversion warnings with constant sources are on by default
+ //   - conversion warnings for literals are on by default
+ //   - bool-to-pointer conversion warnings are on by default
+ //   - __null-to-integer conversion warnings are on by default
+ def Conversion : DiagGroup<"conversion",
+                            [BoolConversion,
+                             ConstantConversion,
+                             EnumConversion,
+                             BitFieldEnumConversion,
+                             FloatConversion,
+                             Shorten64To32,
+                             IntConversion,
+                             ImplicitIntConversion,
+                             ImplicitFloatConversion,
+                             LiteralConversion,
+                             NonLiteralNullConversion, // (1-1)->pointer (etc)
+                             NullConversion, // NULL->non-pointer
+                             ObjCLiteralConversion,
+                             SignConversion,
+                             StringConversion]>,
+                  DiagCategory<"Value Conversion Issue">;
+ 
+ def Unused : DiagGroup<"unused",
+                        [UnusedArgument, UnusedFunction, UnusedLabel,
+                         // UnusedParameter, (matches GCC's behavior)
+                         // UnusedTemplate, (clean-up libc++ before enabling)
+                         // UnusedMemberFunction, (clean-up llvm before enabling)
+                         UnusedPrivateField, UnusedLambdaCapture,
+                         UnusedLocalTypedef, UnusedValue, UnusedVariable,
+                         UnusedButSetVariable, UnusedPropertyIvar]>,
+                         DiagCategory<"Unused Entity Issue">;
+ 
+ // Format settings.
+ def FormatInvalidSpecifier : DiagGroup<"format-invalid-specifier">;
+ def FormatSecurity : DiagGroup<"format-security">;
+ def FormatNonStandard : DiagGroup<"format-non-iso">;
+ def FormatY2K : DiagGroup<"format-y2k">;
+ def FormatPedantic : DiagGroup<"format-pedantic">;
+ def FormatTypeConfusion : DiagGroup<"format-type-confusion">;
+ def Format : DiagGroup<"format",
+                        [FormatExtraArgs, FormatZeroLength, NonNull,
+                         FormatSecurity, FormatY2K, FormatInvalidSpecifier,
+                         FormatInsufficientArgs]>,
+              DiagCategory<"Format String Issue">;
+ def FormatNonLiteral : DiagGroup<"format-nonliteral">;
+ def Format2 : DiagGroup<"format=2",
+                         [FormatNonLiteral, FormatSecurity, FormatY2K]>;
+ 
+ def TypeSafety : DiagGroup<"type-safety">;
+ 
+ def IncompatibleExceptionSpec : DiagGroup<"incompatible-exception-spec">;
+ 
+ def IntToVoidPointerCast : DiagGroup<"int-to-void-pointer-cast">;
+ def IntToPointerCast : DiagGroup<"int-to-pointer-cast",
+                                  [IntToVoidPointerCast]>;
+ def VoidPointerToEnumCast : DiagGroup<"void-pointer-to-enum-cast">;
+ def VoidPointerToIntCast : DiagGroup<"void-pointer-to-int-cast",
+                                      [VoidPointerToEnumCast]>;
+ def PointerToEnumCast : DiagGroup<"pointer-to-enum-cast",
+                                   [VoidPointerToEnumCast]>;
+ def PointerToIntCast : DiagGroup<"pointer-to-int-cast",
+                                  [PointerToEnumCast, VoidPointerToIntCast]>;
+ 
+ def FUseLdPath : DiagGroup<"fuse-ld-path">;
+ 
+ def Move : DiagGroup<"move", [
+     PessimizingMove,
+     RedundantMove,
+     ReturnStdMove,
+     SelfMove
+   ]>;
+ 
+ def Extra : DiagGroup<"extra", [
+     DeprecatedCopy,
+     MissingFieldInitializers,
+     IgnoredQualifiers,
+     InitializerOverrides,
+     SemiBeforeMethodBody,
+     MissingMethodReturnType,
+     SignCompare,
+     UnusedParameter,
+     UnusedButSetParameter,
+     NullPointerArithmetic,
+     NullPointerSubtraction,
+     EmptyInitStatement,
+     StringConcatation,
+     FUseLdPath,
+   ]>;
+ 
+ def Most : DiagGroup<"most", [
+     BoolOperation,
+     CharSubscript,
+     Comment,
+     DeleteNonVirtualDtor,
+     Format,
+     ForLoopAnalysis,
+     FrameAddress,
+     Implicit,
+     InfiniteRecursion,
+     IntInBoolContext,
+     MismatchedTags,
+     MissingBraces,
+     Move,
+     MultiChar,
+     RangeLoopConstruct,
+     Reorder,
+     ReturnType,
+     SelfAssignment,
+     SelfMove,
+     SizeofArrayArgument,
+     SizeofArrayDecay,
+     StringPlusInt,
+     TautologicalCompare,
+     Trigraphs,
+     Uninitialized,
+     UnknownPragmas,
+     Unused,
+     VolatileRegisterVar,
+     ObjCMissingSuperCalls,
+     ObjCDesignatedInit,
+     ObjCFlexibleArray,
+     OverloadedVirtual,
+     PrivateExtern,
+     SelTypeCast,
+     ExternCCompat,
+     UserDefinedWarnings
+  ]>;
+ 
+ // Thread Safety warnings
+ def ThreadSafetyAttributes : DiagGroup<"thread-safety-attributes">;
+ def ThreadSafetyAnalysis   : DiagGroup<"thread-safety-analysis">;
+ def ThreadSafetyPrecise    : DiagGroup<"thread-safety-precise">;
+ def ThreadSafetyReference  : DiagGroup<"thread-safety-reference">;
+ def ThreadSafetyNegative   : DiagGroup<"thread-safety-negative">;
+ def ThreadSafety : DiagGroup<"thread-safety",
+                              [ThreadSafetyAttributes,
+                               ThreadSafetyAnalysis,
+                               ThreadSafetyPrecise,
+                               ThreadSafetyReference]>;
+ def ThreadSafetyVerbose : DiagGroup<"thread-safety-verbose">;
+ def ThreadSafetyBeta : DiagGroup<"thread-safety-beta">;
+ 
+ // Uniqueness Analysis warnings
+ def Consumed       : DiagGroup<"consumed">;
+ 
+ // Note that putting warnings in -Wall will not disable them by default. If a
+ // warning should be active _only_ when -Wall is passed in, mark it as
+ // DefaultIgnore in addition to putting it here.
+ def All : DiagGroup<"all", [Most, Parentheses, Switch, SwitchBool,
+                             MisleadingIndentation]>;
+ 
+ // Warnings that should be in clang-cl /w4.
+ def : DiagGroup<"CL4", [All, Extra]>;
+ 
+ // Warnings enabled by -pedantic.  This is magically filled in by TableGen.
+ def Pedantic : DiagGroup<"pedantic">;
+ 
+ // Aliases.
+ def : DiagGroup<"", [Extra]>;                   // -W = -Wextra
+ def : DiagGroup<"endif-labels", [ExtraTokens]>; // -Wendif-labels=-Wextra-tokens
+ def : DiagGroup<"cpp", [PoundWarning]>;         // -Wcpp = -W#warnings
+ def : DiagGroup<"comments", [Comment]>;         // -Wcomments = -Wcomment
+ def : DiagGroup<"conversion-null",
+                 [NullConversion]>; // -Wconversion-null = -Wnull-conversion
+ def : DiagGroup<"bool-conversions",
+                 [BoolConversion]>; // -Wbool-conversions  = -Wbool-conversion
+ def : DiagGroup<"int-conversions",
+                 [IntConversion]>; // -Wint-conversions = -Wint-conversion
+ def : DiagGroup<"vector-conversions",
+                 [VectorConversion]>; // -Wvector-conversions = -Wvector-conversion
+ def : DiagGroup<"unused-local-typedefs", [UnusedLocalTypedef]>;
+                 // -Wunused-local-typedefs = -Wunused-local-typedef
+ 
+ // A warning group for warnings that we want to have on by default in clang,
+ // but which aren't on by default in GCC.
+ def NonGCC : DiagGroup<"non-gcc",
+     [SignCompare, Conversion, LiteralRange]>;
+ 
+ // A warning group for warnings about using C++11 features as extensions in
+ // earlier C++ versions.
+ def CXX11 : DiagGroup<"c++11-extensions", [CXX11ExtraSemi, CXX11InlineNamespace,
+                                            CXX11LongLong]>;
+ 
+ // A warning group for warnings about using C++14 features as extensions in
+ // earlier C++ versions.
+ def CXX14 : DiagGroup<"c++14-extensions", [CXX14BinaryLiteral]>;
+ 
+ // A warning group for warnings about using C++17 features as extensions in
+ // earlier C++ versions.
+ def CXX17 : DiagGroup<"c++17-extensions">;
+ 
+ // A warning group for warnings about using C++20 features as extensions in
+ // earlier C++ versions.
+ def CXX20 : DiagGroup<"c++20-extensions", [CXX20Designator]>;
+ 
+ // A warning group for warnings about using C++2b features as extensions in
+ // earlier C++ versions.
+ def CXX2b : DiagGroup<"c++2b-extensions">;
+ 
+ def : DiagGroup<"c++0x-extensions", [CXX11]>;
+ def : DiagGroup<"c++1y-extensions", [CXX14]>;
+ def : DiagGroup<"c++1z-extensions", [CXX17]>;
+ def : DiagGroup<"c++2a-extensions", [CXX20]>;
+ 
+ def DelegatingCtorCycles :
+   DiagGroup<"delegating-ctor-cycles">;
+diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
+index 0e803ee028ce..3f1e374dd326 100644
+--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
++++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
+@@ -1,1067 +1,1068 @@
+ //==--- DiagnosticSemaKinds.td - libsema diagnostics ----------------------===//
+ //
+ // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+ // See https://llvm.org/LICENSE.txt for license information.
+ // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ //===----------------------------------------------------------------------===//
+ // Semantic Analysis
+ //===----------------------------------------------------------------------===//
+ 
+ let Component = "Sema" in {
+ let CategoryName = "Semantic Issue" in {
+ def note_previous_decl : Note<"%0 declared here">;
+ def note_entity_declared_at : Note<"%0 declared here">;
+ def note_callee_decl : Note<"%0 declared here">;
+ def note_defined_here : Note<"%0 defined here">;
+ 
+ // For loop analysis
+ def warn_variables_not_in_loop_body : Warning<
+   "variable%select{s| %1|s %1 and %2|s %1, %2, and %3|s %1, %2, %3, and %4}0 "
+   "used in loop condition not modified in loop body">,
+   InGroup<ForLoopAnalysis>, DefaultIgnore;
+ def warn_redundant_loop_iteration : Warning<
+   "variable %0 is %select{decremented|incremented}1 both in the loop header "
+   "and in the loop body">,
+   InGroup<ForLoopAnalysis>, DefaultIgnore;
+ def note_loop_iteration_here : Note<"%select{decremented|incremented}0 here">;
+ 
+ def warn_duplicate_enum_values : Warning<
+   "element %0 has been implicitly assigned %1 which another element has "
+   "been assigned">, InGroup<DiagGroup<"duplicate-enum">>, DefaultIgnore;
+ def note_duplicate_element : Note<"element %0 also has value %1">;
+ 
+ // Absolute value functions
+ def warn_unsigned_abs : Warning<
+   "taking the absolute value of unsigned type %0 has no effect">,
+   InGroup<AbsoluteValue>;
+ def note_remove_abs : Note<
+   "remove the call to '%0' since unsigned values cannot be negative">;
+ def warn_abs_too_small : Warning<
+   "absolute value function %0 given an argument of type %1 but has parameter "
+   "of type %2 which may cause truncation of value">, InGroup<AbsoluteValue>;
+ def warn_wrong_absolute_value_type : Warning<
+   "using %select{integer|floating point|complex}1 absolute value function %0 "
+   "when argument is of %select{integer|floating point|complex}2 type">,
+   InGroup<AbsoluteValue>;
+ def note_replace_abs_function : Note<"use function '%0' instead">;
+ def warn_pointer_abs : Warning<
+   "taking the absolute value of %select{pointer|function|array}0 type %1 is suspicious">,
+   InGroup<AbsoluteValue>;
+ 
+ def warn_max_unsigned_zero : Warning<
+   "taking the max of "
+   "%select{a value and unsigned zero|unsigned zero and a value}0 "
+   "is always equal to the other value">,
+   InGroup<MaxUnsignedZero>;
+ def note_remove_max_call : Note<
+   "remove call to max function and unsigned zero argument">;
+ 
+ def warn_infinite_recursive_function : Warning<
+   "all paths through this function will call itself">,
+   InGroup<InfiniteRecursion>, DefaultIgnore;
+ 
+ def warn_comma_operator : Warning<"possible misuse of comma operator here">,
+   InGroup<DiagGroup<"comma">>, DefaultIgnore;
+ def note_cast_to_void : Note<"cast expression to void to silence warning">;
++def note_cast_operand_to_int : Note<"cast one or both operands to int to silence warning">;
+ 
+ // Constant expressions
+ def err_expr_not_ice : Error<
+   "expression is not an %select{integer|integral}0 constant expression">;
+ def ext_expr_not_ice : Extension<
+   "expression is not an %select{integer|integral}0 constant expression; "
+   "folding it to a constant is a GNU extension">, InGroup<GNUFoldingConstant>;
+ def err_typecheck_converted_constant_expression : Error<
+   "value of type %0 is not implicitly convertible to %1">;
+ def err_typecheck_converted_constant_expression_disallowed : Error<
+   "conversion from %0 to %1 is not allowed in a converted constant expression">;
+ def err_typecheck_converted_constant_expression_indirect : Error<
+   "conversion from %0 to %1 in converted constant expression would "
+   "bind reference to a temporary">;
+ def err_expr_not_cce : Error<
+   "%select{case value|enumerator value|non-type template argument|"
+   "array size|explicit specifier argument|noexcept specifier argument}0 "
+   "is not a constant expression">;
+ def ext_cce_narrowing : ExtWarn<
+   "%select{case value|enumerator value|non-type template argument|"
+   "array size|explicit specifier argument|noexcept specifier argument}0 "
+   "%select{cannot be narrowed from type %2 to %3|"
+   "evaluates to %2, which cannot be narrowed to type %3}1">,
+   InGroup<CXX11Narrowing>, DefaultError, SFINAEFailure;
+ def err_ice_not_integral : Error<
+   "%select{integer|integral}1 constant expression must have "
+   "%select{integer|integral or unscoped enumeration}1 type, not %0">;
+ def err_ice_incomplete_type : Error<
+   "integral constant expression has incomplete class type %0">;
+ def err_ice_explicit_conversion : Error<
+   "integral constant expression requires explicit conversion from %0 to %1">;
+ def note_ice_conversion_here : Note<
+   "conversion to %select{integral|enumeration}0 type %1 declared here">;
+ def err_ice_ambiguous_conversion : Error<
+   "ambiguous conversion from type %0 to an integral or unscoped "
+   "enumeration type">;
+ def err_ice_too_large : Error<
+   "integer constant expression evaluates to value %0 that cannot be "
+   "represented in a %1-bit %select{signed|unsigned}2 integer type">;
+ def err_expr_not_string_literal : Error<"expression is not a string literal">;
+ 
+ // Semantic analysis of constant literals.
+ def ext_predef_outside_function : Warning<
+   "predefined identifier is only valid inside function">,
+   InGroup<DiagGroup<"predefined-identifier-outside-function">>;
+ def warn_float_overflow : Warning<
+   "magnitude of floating-point constant too large for type %0; maximum is %1">,
+    InGroup<LiteralRange>;
+ def warn_float_underflow : Warning<
+   "magnitude of floating-point constant too small for type %0; minimum is %1">,
+   InGroup<LiteralRange>;
+ def warn_double_const_requires_fp64 : Warning<
+   "double precision constant requires %select{cl_khr_fp64|cl_khr_fp64 and __opencl_c_fp64}0, "
+   "casting to single precision">;
+ def err_half_const_requires_fp16 : Error<
+   "half precision constant requires cl_khr_fp16">;
+ 
+ // C99 variable-length arrays
+ def ext_vla : Extension<"variable length arrays are a C99 feature">,
+   InGroup<VLAExtension>;
+ def warn_vla_used : Warning<"variable length array used">,
+   InGroup<VLA>, DefaultIgnore;
+ def err_vla_in_sfinae : Error<
+   "variable length array cannot be formed during template argument deduction">;
+ def err_array_star_in_function_definition : Error<
+   "variable length array must be bound in function definition">;
+ def err_vla_decl_in_file_scope : Error<
+   "variable length array declaration not allowed at file scope">;
+ def err_vla_decl_has_static_storage : Error<
+   "variable length array declaration cannot have 'static' storage duration">;
+ def err_vla_decl_has_extern_linkage : Error<
+   "variable length array declaration cannot have 'extern' linkage">;
+ def ext_vla_folded_to_constant : ExtWarn<
+   "variable length array folded to constant array as an extension">,
+   InGroup<GNUFoldingConstant>;
+ def err_vla_unsupported : Error<
+   "variable length arrays are not supported for the current target">;
+ def note_vla_unsupported : Note<
+   "variable length arrays are not supported for the current target">;
+ 
+ // C99 variably modified types
+ def err_variably_modified_template_arg : Error<
+   "variably modified type %0 cannot be used as a template argument">;
+ def err_variably_modified_nontype_template_param : Error<
+   "non-type template parameter of variably modified type %0">;
+ def err_variably_modified_new_type : Error<
+   "'new' cannot allocate object of variably modified type %0">;
+ 
+ // C99 Designated Initializers
+ def ext_designated_init : Extension<
+   "designated initializers are a C99 feature">, InGroup<C99Designator>;
+ def err_array_designator_negative : Error<
+   "array designator value '%0' is negative">;
+ def err_array_designator_empty_range : Error<
+   "array designator range [%0, %1] is empty">;
+ def err_array_designator_non_array : Error<
+   "array designator cannot initialize non-array type %0">;
+ def err_array_designator_too_large : Error<
+   "array designator index (%0) exceeds array bounds (%1)">;
+ def err_field_designator_non_aggr : Error<
+   "field designator cannot initialize a "
+   "%select{non-struct, non-union|non-class}0 type %1">;
+ def err_field_designator_unknown : Error<
+   "field designator %0 does not refer to any field in type %1">;
+ def err_field_designator_nonfield : Error<
+   "field designator %0 does not refer to a non-static data member">;
+ def note_field_designator_found : Note<"field designator refers here">;
+ def err_designator_for_scalar_or_sizeless_init : Error<
+   "designator in initializer for %select{scalar|indivisible sizeless}0 "
+   "type %1">;
+ def warn_initializer_overrides : Warning<
+   "initializer %select{partially |}0overrides prior initialization of "
+   "this subobject">, InGroup<InitializerOverrides>;
+ def ext_initializer_overrides : ExtWarn<warn_initializer_overrides.Text>,
+   InGroup<InitializerOverrides>, SFINAEFailure;
+ def err_initializer_overrides_destructed : Error<
+   "initializer would partially override prior initialization of object of "
+   "type %1 with non-trivial destruction">;
+ def note_previous_initializer : Note<
+   "previous initialization %select{|with side effects }0is here"
+   "%select{| (side effects will not occur at run time)}0">;
+ def err_designator_into_flexible_array_member : Error<
+   "designator into flexible array member subobject">;
+ def note_flexible_array_member : Note<
+   "initialized flexible array member %0 is here">;
+ def ext_flexible_array_init : Extension<
+   "flexible array initialization is a GNU extension">, InGroup<GNUFlexibleArrayInitializer>;
+ 
+ // C++20 designated initializers
+ def ext_cxx_designated_init : Extension<
+   "designated initializers are a C++20 extension">, InGroup<CXX20Designator>;
+ def warn_cxx17_compat_designated_init : Warning<
+   "designated initializers are incompatible with C++ standards before C++20">,
+   InGroup<CXXPre20CompatPedantic>, DefaultIgnore;
+ def ext_designated_init_mixed : ExtWarn<
+   "mixture of designated and non-designated initializers in the same "
+   "initializer list is a C99 extension">, InGroup<C99Designator>;
+ def note_designated_init_mixed : Note<
+   "first non-designated initializer is here">;
+ def ext_designated_init_array : ExtWarn<
+   "array designators are a C99 extension">, InGroup<C99Designator>;
+ def ext_designated_init_nested : ExtWarn<
+   "nested designators are a C99 extension">, InGroup<C99Designator>;
+ def ext_designated_init_reordered : ExtWarn<
+   "ISO C++ requires field designators to be specified in declaration order; "
+   "field %1 will be initialized after field %0">, InGroup<ReorderInitList>,
+   SFINAEFailure;
+ def note_previous_field_init : Note<
+   "previous initialization for field %0 is here">;
+ def ext_designated_init_brace_elision : ExtWarn<
+   "brace elision for designated initializer is a C99 extension">,
+   InGroup<C99Designator>, SFINAEFailure;
+ 
+ // Declarations.
+ def ext_plain_complex : ExtWarn<
+   "plain '_Complex' requires a type specifier; assuming '_Complex double'">;
+ def ext_imaginary_constant : Extension<
+   "imaginary constants are a GNU extension">, InGroup<GNUImaginaryConstant>;
+ def ext_integer_complex : Extension<
+   "complex integer types are a GNU extension">, InGroup<GNUComplexInteger>;
+ 
+ def err_invalid_saturation_spec : Error<"'_Sat' specifier is only valid on "
+   "'_Fract' or '_Accum', not '%0'">;
+ def err_invalid_sign_spec : Error<"'%0' cannot be signed or unsigned">;
+ def err_invalid_width_spec : Error<
+   "'%select{|short|long|long long}0 %1' is invalid">;
+ def err_invalid_complex_spec : Error<"'_Complex %0' is invalid">;
+ 
+ def ext_auto_type_specifier : ExtWarn<
+   "'auto' type specifier is a C++11 extension">, InGroup<CXX11>;
+ def warn_auto_storage_class : Warning<
+   "'auto' storage class specifier is redundant and incompatible with C++11">,
+   InGroup<CXX11Compat>, DefaultIgnore;
+ 
+ def warn_deprecated_register : Warning<
+   "'register' storage class specifier is deprecated "
+   "and incompatible with C++17">, InGroup<DeprecatedRegister>;
+ def ext_register_storage_class : ExtWarn<
+   "ISO C++17 does not allow 'register' storage class specifier">,
+   DefaultError, InGroup<Register>;
+ 
+ def err_invalid_decl_spec_combination : Error<
+   "cannot combine with previous '%0' declaration specifier">;
+ def err_invalid_vector_decl_spec_combination : Error<
+   "cannot combine with previous '%0' declaration specifier. "
+   "'__vector' must be first">;
+ def err_invalid_pixel_decl_spec_combination : Error<
+   "'__pixel' must be preceded by '__vector'.  "
+   "'%0' declaration specifier not allowed here">;
+ def err_invalid_vector_bool_decl_spec : Error<
+   "cannot use '%0' with '__vector bool'">;
+ def err_invalid_vector_long_decl_spec : Error<
+   "cannot use 'long' with '__vector'">;
+ def err_invalid_vector_float_decl_spec : Error<
+   "cannot use 'float' with '__vector'">;
+ def err_invalid_vector_double_decl_spec : Error <
+   "use of 'double' with '__vector' requires VSX support to be enabled "
+   "(available on POWER7 or later)">;
+ def err_invalid_vector_bool_int128_decl_spec : Error <
+   "use of '__int128' with '__vector bool' requires VSX support enabled (on "
+   "POWER10 or later)">;
+ def err_invalid_vector_long_long_decl_spec : Error <
+   "use of 'long long' with '__vector bool' requires VSX support (available on "
+   "POWER7 or later) or extended Altivec support (available on POWER8 or later) "
+   "to be enabled">;
+ def err_invalid_vector_long_double_decl_spec : Error<
+   "cannot use 'long double' with '__vector'">;
+ def warn_vector_long_decl_spec_combination : Warning<
+   "Use of 'long' with '__vector' is deprecated">, InGroup<Deprecated>;
+ 
+ def err_redeclaration_different_type : Error<
+   "redeclaration of %0 with a different type%diff{: $ vs $|}1,2">;
+ def err_bad_variable_name : Error<
+   "%0 cannot be the name of a variable or data member">;
+ def err_bad_parameter_name : Error<
+   "%0 cannot be the name of a parameter">;
+ def err_bad_parameter_name_template_id : Error<
+   "parameter name cannot have template arguments">;
+ def ext_parameter_name_omitted_c2x : ExtWarn<
+   "omitting the parameter name in a function definition is a C2x extension">,
+   InGroup<C2x>;
+ def err_anyx86_interrupt_attribute : Error<
+   "%select{x86|x86-64}0 'interrupt' attribute only applies to functions that "
+   "have %select{a 'void' return type|"
+   "only a pointer parameter optionally followed by an integer parameter|"
+   "a pointer as the first parameter|a %2 type as the second parameter}1">;
+ def err_anyx86_interrupt_called : Error<
+   "interrupt service routine cannot be called directly">;
+ def warn_anyx86_interrupt_regsave : Warning<
+   "interrupt service routine should only call a function"
+   " with attribute 'no_caller_saved_registers'">,
+   InGroup<DiagGroup<"interrupt-service-routine">>;
+ def warn_arm_interrupt_calling_convention : Warning<
+    "call to function without interrupt attribute could clobber interruptee's VFP registers">,
+    InGroup<Extra>;
+ def warn_interrupt_attribute_invalid : Warning<
+    "%select{MIPS|MSP430|RISC-V}0 'interrupt' attribute only applies to "
+    "functions that have %select{no parameters|a 'void' return type}1">,
+    InGroup<IgnoredAttributes>;
+ def warn_riscv_repeated_interrupt_attribute : Warning<
+   "repeated RISC-V 'interrupt' attribute">, InGroup<IgnoredAttributes>;
+ def note_riscv_repeated_interrupt_attribute : Note<
+   "repeated RISC-V 'interrupt' attribute is here">;
+ def warn_unused_parameter : Warning<"unused parameter %0">,
+   InGroup<UnusedParameter>, DefaultIgnore;
+ def warn_unused_but_set_parameter : Warning<"parameter %0 set but not used">,
+   InGroup<UnusedButSetParameter>, DefaultIgnore;
+ def warn_unused_variable : Warning<"unused variable %0">,
+   InGroup<UnusedVariable>, DefaultIgnore;
+ def warn_unused_but_set_variable : Warning<"variable %0 set but not used">,
+   InGroup<UnusedButSetVariable>, DefaultIgnore;
+ def warn_unused_local_typedef : Warning<
+   "unused %select{typedef|type alias}0 %1">,
+   InGroup<UnusedLocalTypedef>, DefaultIgnore;
+ def warn_unused_property_backing_ivar :
+   Warning<"ivar %0 which backs the property is not "
+   "referenced in this property's accessor">,
+   InGroup<UnusedPropertyIvar>, DefaultIgnore;
+ def warn_unused_const_variable : Warning<"unused variable %0">,
+   InGroup<UnusedConstVariable>, DefaultIgnore;
+ def warn_unused_exception_param : Warning<"unused exception parameter %0">,
+   InGroup<UnusedExceptionParameter>, DefaultIgnore;
+ def warn_decl_in_param_list : Warning<
+   "declaration of %0 will not be visible outside of this function">,
+   InGroup<Visibility>;
+ def warn_redefinition_in_param_list : Warning<
+   "redefinition of %0 will not be visible outside of this function">,
+   InGroup<Visibility>;
+ def warn_empty_parens_are_function_decl : Warning<
+   "empty parentheses interpreted as a function declaration">,
+   InGroup<VexingParse>;
+ def warn_parens_disambiguated_as_function_declaration : Warning<
+   "parentheses were disambiguated as a function declaration">,
+   InGroup<VexingParse>;
+ def warn_parens_disambiguated_as_variable_declaration : Warning<
+   "parentheses were disambiguated as redundant parentheses around declaration "
+   "of variable named %0">, InGroup<VexingParse>;
+ def warn_redundant_parens_around_declarator : Warning<
+   "redundant parentheses surrounding declarator">,
+   InGroup<DiagGroup<"redundant-parens">>, DefaultIgnore;
+ def note_additional_parens_for_variable_declaration : Note<
+   "add a pair of parentheses to declare a variable">;
+ def note_raii_guard_add_name : Note<
+   "add a variable name to declare a %0 initialized with %1">;
+ def note_function_style_cast_add_parentheses : Note<
+   "add enclosing parentheses to perform a function-style cast">;
+ def note_remove_parens_for_variable_declaration : Note<
+   "remove parentheses to silence this warning">;
+ def note_empty_parens_function_call : Note<
+   "change this ',' to a ';' to call %0">;
+ def note_empty_parens_default_ctor : Note<
+   "remove parentheses to declare a variable">;
+ def note_empty_parens_zero_initialize : Note<
+   "replace parentheses with an initializer to declare a variable">;
+ def warn_unused_function : Warning<"unused function %0">,
+   InGroup<UnusedFunction>, DefaultIgnore;
+ def warn_unused_template : Warning<"unused %select{function|variable}0 template %1">,
+   InGroup<UnusedTemplate>, DefaultIgnore;
+ def warn_unused_member_function : Warning<"unused member function %0">,
+   InGroup<UnusedMemberFunction>, DefaultIgnore;
+ def warn_used_but_marked_unused: Warning<"%0 was marked unused but was used">,
+   InGroup<UsedButMarkedUnused>, DefaultIgnore;
+ def warn_unneeded_internal_decl : Warning<
+   "%select{function|variable}0 %1 is not needed and will not be emitted">,
+   InGroup<UnneededInternalDecl>, DefaultIgnore;
+ def warn_unneeded_static_internal_decl : Warning<
+   "'static' function %0 declared in header file "
+   "should be declared 'static inline'">,
+   InGroup<UnneededInternalDecl>, DefaultIgnore;
+ def warn_unneeded_member_function : Warning<
+   "member function %0 is not needed and will not be emitted">,
+   InGroup<UnneededMemberFunction>, DefaultIgnore;
+ def warn_unused_private_field: Warning<"private field %0 is not used">,
+   InGroup<UnusedPrivateField>, DefaultIgnore;
+ def warn_unused_lambda_capture: Warning<"lambda capture %0 is not "
+   "%select{used|required to be captured for this use}1">,
+   InGroup<UnusedLambdaCapture>, DefaultIgnore;
+ 
+ def warn_reserved_extern_symbol: Warning<
+   "identifier %0 is reserved because %select{"
+   "<ERROR>|" // ReservedIdentifierStatus::NotReserved
+   "it starts with '_' at global scope|"
+   "it starts with '__'|"
+   "it starts with '_' followed by a capital letter|"
+   "it contains '__'}1">,
+   InGroup<ReservedIdentifier>, DefaultIgnore;
+ 
+ def warn_parameter_size: Warning<
+   "%0 is a large (%1 bytes) pass-by-value argument; "
+   "pass it by reference instead ?">, InGroup<LargeByValueCopy>;
+ def warn_return_value_size: Warning<
+   "return value of %0 is a large (%1 bytes) pass-by-value object; "
+   "pass it by reference instead ?">, InGroup<LargeByValueCopy>;
+ def warn_return_value_udt: Warning<
+   "%0 has C-linkage specified, but returns user-defined type %1 which is "
+   "incompatible with C">, InGroup<ReturnTypeCLinkage>;
+ def warn_return_value_udt_incomplete: Warning<
+   "%0 has C-linkage specified, but returns incomplete type %1 which could be "
+   "incompatible with C">, InGroup<ReturnTypeCLinkage>;
+ def warn_implicit_function_decl : Warning<
+   "implicit declaration of function %0">,
+   InGroup<ImplicitFunctionDeclare>, DefaultIgnore;
+ def ext_implicit_function_decl : ExtWarn<
+   "implicit declaration of function %0 is invalid in C99">,
+   InGroup<ImplicitFunctionDeclare>;
+ def note_function_suggestion : Note<"did you mean %0?">;
+ 
+ def err_ellipsis_first_param : Error<
+   "ISO C requires a named parameter before '...'">;
+ def err_declarator_need_ident : Error<"declarator requires an identifier">;
+ def err_language_linkage_spec_unknown : Error<"unknown linkage language">;
+ def err_language_linkage_spec_not_ascii : Error<
+   "string literal in language linkage specifier cannot have an "
+   "encoding-prefix">;
+ def ext_use_out_of_scope_declaration : ExtWarn<
+   "use of out-of-scope declaration of %0%select{| whose type is not "
+   "compatible with that of an implicit declaration}1">,
+   InGroup<DiagGroup<"out-of-scope-function">>;
+ def err_inline_non_function : Error<
+   "'inline' can only appear on functions%select{| and non-local variables}0">;
+ def err_noreturn_non_function : Error<
+   "'_Noreturn' can only appear on functions">;
+ def warn_qual_return_type : Warning<
+   "'%0' type qualifier%s1 on return type %plural{1:has|:have}1 no effect">,
+   InGroup<IgnoredQualifiers>, DefaultIgnore;
+ def warn_deprecated_redundant_constexpr_static_def : Warning<
+   "out-of-line definition of constexpr static data member is redundant "
+   "in C++17 and is deprecated">,
+   InGroup<Deprecated>, DefaultIgnore;
+ 
+ def warn_decl_shadow :
+   Warning<"declaration shadows a %select{"
+           "local variable|"
+           "variable in %2|"
+           "static data member of %2|"
+           "field of %2|"
+           "typedef in %2|"
+           "type alias in %2|"
+           "structured binding}1">,
+   InGroup<Shadow>, DefaultIgnore;
+ def warn_decl_shadow_uncaptured_local :
+   Warning<warn_decl_shadow.Text>,
+   InGroup<ShadowUncapturedLocal>, DefaultIgnore;
+ def warn_ctor_parm_shadows_field:
+   Warning<"constructor parameter %0 shadows the field %1 of %2">,
+   InGroup<ShadowFieldInConstructor>, DefaultIgnore;
+ def warn_modifying_shadowing_decl :
+   Warning<"modifying constructor parameter %0 that shadows a "
+           "field of %1">,
+   InGroup<ShadowFieldInConstructorModified>, DefaultIgnore;
+ 
+ // C++ decomposition declarations
+ def err_decomp_decl_context : Error<
+   "decomposition declaration not permitted in this context">;
+ def warn_cxx14_compat_decomp_decl : Warning<
+   "decomposition declarations are incompatible with "
+   "C++ standards before C++17">, DefaultIgnore, InGroup<CXXPre17Compat>;
+ def ext_decomp_decl : ExtWarn<
+   "decomposition declarations are a C++17 extension">, InGroup<CXX17>;
+ def ext_decomp_decl_cond : ExtWarn<
+   "ISO C++17 does not permit structured binding declaration in a condition">,
+   InGroup<DiagGroup<"binding-in-condition">>;
+ def err_decomp_decl_spec : Error<
+   "decomposition declaration cannot be declared "
+   "%plural{1:'%1'|:with '%1' specifiers}0">;
+ def ext_decomp_decl_spec : ExtWarn<
+   "decomposition declaration declared "
+   "%plural{1:'%1'|:with '%1' specifiers}0 is a C++20 extension">,
+   InGroup<CXX20>;
+ def warn_cxx17_compat_decomp_decl_spec : Warning<
+   "decomposition declaration declared "
+   "%plural{1:'%1'|:with '%1' specifiers}0 "
+   "is incompatible with C++ standards before C++20">,
+   InGroup<CXXPre20Compat>, DefaultIgnore;
+ def err_decomp_decl_type : Error<
+   "decomposition declaration cannot be declared with type %0; "
+   "declared type must be 'auto' or reference to 'auto'">;
+ def err_decomp_decl_parens : Error<
+   "decomposition declaration cannot be declared with parentheses">;
+ def err_decomp_decl_template : Error<
+   "decomposition declaration template not supported">;
+ def err_decomp_decl_not_alone : Error<
+   "decomposition declaration must be the only declaration in its group">;
+ def err_decomp_decl_requires_init : Error<
+   "decomposition declaration %0 requires an initializer">;
+ def err_decomp_decl_wrong_number_bindings : Error<
+   "type %0 decomposes into %3 %plural{1:element|:elements}2, but "
+   "%select{%plural{0:no|:only %1}1|%1}4 "
+   "%plural{1:name was|:names were}1 provided">;
+ def err_decomp_decl_unbindable_type : Error<
+   "cannot decompose %select{union|non-class, non-array}1 type %2">;
+ def err_decomp_decl_multiple_bases_with_members : Error<
+   "cannot decompose class type %1: "
+   "%select{its base classes %2 and|both it and its base class}0 %3 "
+   "have non-static data members">;
+ def err_decomp_decl_ambiguous_base : Error<
+   "cannot decompose members of ambiguous base class %1 of %0:%2">;
+ def err_decomp_decl_inaccessible_base : Error<
+   "cannot decompose members of inaccessible base class %1 of %0">,
+   AccessControl;
+ def err_decomp_decl_inaccessible_field : Error<
+   "cannot decompose %select{private|protected}0 member %1 of %3">,
+   AccessControl;
+ def err_decomp_decl_lambda : Error<
+   "cannot decompose lambda closure type">;
+ def err_decomp_decl_anon_union_member : Error<
+   "cannot decompose class type %0 because it has an anonymous "
+   "%select{struct|union}1 member">;
+ def err_decomp_decl_std_tuple_element_not_specialized : Error<
+   "cannot decompose this type; 'std::tuple_element<%0>::type' "
+   "does not name a type">;
+ def err_decomp_decl_std_tuple_size_not_constant : Error<
+   "cannot decompose this type; 'std::tuple_size<%0>::value' "
+   "is not a valid integral constant expression">;
+ def note_in_binding_decl_init : Note<
+   "in implicit initialization of binding declaration %0">;
+ 
+ def err_std_type_trait_not_class_template : Error<
+   "unsupported standard library implementation: "
+   "'std::%0' is not a class template">;
+ 
+ // C++ using declarations
+ def err_using_requires_qualname : Error<
+   "using declaration requires a qualified name">;
+ def err_using_typename_non_type : Error<
+   "'typename' keyword used on a non-type">;
+ def err_using_dependent_value_is_type : Error<
+   "dependent using declaration resolved to type without 'typename'">;
+ def err_using_decl_nested_name_specifier_is_not_class : Error<
+   "using declaration in class refers into '%0', which is not a class">;
+ def warn_cxx17_compat_using_decl_non_member_enumerator : Warning<
+   "member using declaration naming non-class '%0' enumerator is "
+   "incompatible with C++ standards before C++20">, InGroup<CXXPre20Compat>,
+   DefaultIgnore;
+ def err_using_decl_nested_name_specifier_is_current_class : Error<
+   "using declaration refers to its own class">;
+ def err_using_decl_nested_name_specifier_is_not_base_class : Error<
+   "using declaration refers into '%0', which is not a base class of %1">;
+ def err_using_decl_constructor_not_in_direct_base : Error<
+   "%0 is not a direct base of %1, cannot inherit constructors">;
+ def err_using_decl_can_not_refer_to_class_member : Error<
+   "using declaration cannot refer to class member">;
+ def warn_cxx17_compat_using_decl_class_member_enumerator : Warning<
+   "member using declaration naming a non-member enumerator is incompatible "
+   "with C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
+ def ext_using_decl_class_member_enumerator : ExtWarn<
+   "member using declaration naming a non-member enumerator is "
+   "a C++20 extension">, InGroup<CXX20>;
+ def err_using_enum_is_dependent : Error<
+   "using-enum cannot name a dependent type">;
+ def err_ambiguous_inherited_constructor : Error<
+   "constructor of %0 inherited from multiple base class subobjects">;
+ def note_ambiguous_inherited_constructor_using : Note<
+   "inherited from base class %0 here">;
+ def note_using_decl_class_member_workaround : Note<
+   "use %select{an alias declaration|a typedef declaration|a reference|"
+   "a const variable|a constexpr variable}0 instead">;
+ def err_using_decl_can_not_refer_to_namespace : Error<
+   "using declaration cannot refer to a namespace">;
+ def warn_cxx17_compat_using_decl_scoped_enumerator: Warning<
+   "using declaration naming a scoped enumerator is incompatible with "
+   "C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
+ def ext_using_decl_scoped_enumerator : ExtWarn<
+   "using declaration naming a scoped enumerator is a C++20 extension">,
+   InGroup<CXX20>;
+ def err_using_decl_constructor : Error<
+   "using declaration cannot refer to a constructor">;
+ def warn_cxx98_compat_using_decl_constructor : Warning<
+   "inheriting constructors are incompatible with C++98">,
+   InGroup<CXX98Compat>, DefaultIgnore;
+ def err_using_decl_destructor : Error<
+   "using declaration cannot refer to a destructor">;
+ def err_using_decl_template_id : Error<
+   "using declaration cannot refer to a template specialization">;
+ def note_using_decl_target : Note<"target of using declaration">;
+ def note_using_decl_conflict : Note<"conflicting declaration">;
+ def err_using_decl_redeclaration : Error<"redeclaration of using declaration">;
+ def err_using_decl_conflict : Error<
+   "target of using declaration conflicts with declaration already in scope">;
+ def err_using_decl_conflict_reverse : Error<
+   "declaration conflicts with target of using declaration already in scope">;
+ def note_using_decl : Note<"%select{|previous }0using declaration">;
+ def err_using_decl_redeclaration_expansion : Error<
+   "using declaration pack expansion at block scope produces multiple values">;
+ def err_use_of_empty_using_if_exists : Error<
+   "reference to unresolved using declaration">;
+ def note_empty_using_if_exists_here : Note<
+   "using declaration annotated with 'using_if_exists' here">;
+ def err_using_if_exists_on_ctor : Error<
+   "'using_if_exists' attribute cannot be applied to an inheriting constructor">;
+ def err_using_enum_decl_redeclaration : Error<
+   "redeclaration of using-enum declaration">;
+ def note_using_enum_decl : Note<"%select{|previous }0using-enum declaration">;
+ 
+ def warn_access_decl_deprecated : Warning<
+   "access declarations are deprecated; use using declarations instead">,
+   InGroup<Deprecated>;
+ def err_access_decl : Error<
+   "ISO C++11 does not allow access declarations; "
+   "use using declarations instead">;
+ def warn_deprecated_copy : Warning<
+   "definition of implicit copy %select{constructor|assignment operator}1 "
+   "for %0 is deprecated because it has a user-declared copy "
+   "%select{assignment operator|constructor}1">,
+   InGroup<DeprecatedCopy>, DefaultIgnore;
+ def warn_deprecated_copy_with_dtor : Warning<
+   "definition of implicit copy %select{constructor|assignment operator}1 "
+   "for %0 is deprecated because it has a user-declared destructor">,
+   InGroup<DeprecatedCopyWithDtor>, DefaultIgnore;
+ def warn_deprecated_copy_with_user_provided_copy: Warning<
+   "definition of implicit copy %select{constructor|assignment operator}1 "
+   "for %0 is deprecated because it has a user-provided copy "
+   "%select{assignment operator|constructor}1">,
+   InGroup<DeprecatedCopyWithUserProvidedCopy>, DefaultIgnore;
+ def warn_deprecated_copy_with_user_provided_dtor : Warning<
+   "definition of implicit copy %select{constructor|assignment operator}1 "
+   "for %0 is deprecated because it has a user-provided destructor">,
+   InGroup<DeprecatedCopyWithUserProvidedDtor>, DefaultIgnore;
+ def warn_cxx17_compat_exception_spec_in_signature : Warning<
+   "mangled name of %0 will change in C++17 due to non-throwing exception "
+   "specification in function signature">, InGroup<CXX17CompatMangling>;
+ 
+ def warn_global_constructor : Warning<
+   "declaration requires a global constructor">,
+   InGroup<GlobalConstructors>, DefaultIgnore;
+ def warn_global_destructor : Warning<
+   "declaration requires a global destructor">,
+    InGroup<GlobalConstructors>, DefaultIgnore;
+ def warn_exit_time_destructor : Warning<
+   "declaration requires an exit-time destructor">,
+   InGroup<ExitTimeDestructors>, DefaultIgnore;
+ 
+ def err_invalid_thread : Error<
+   "'%0' is only allowed on variable declarations">;
+ def err_thread_non_global : Error<
+   "'%0' variables must have global storage">;
+ def err_thread_unsupported : Error<
+   "thread-local storage is not supported for the current target">;
+ 
+ // FIXME: Combine fallout warnings to just one warning.
+ def warn_maybe_falloff_nonvoid_function : Warning<
+   "non-void function does not return a value in all control paths">,
+   InGroup<ReturnType>;
+ def warn_falloff_nonvoid_function : Warning<
+   "non-void function does not return a value">,
+   InGroup<ReturnType>;
+ def err_maybe_falloff_nonvoid_block : Error<
+   "non-void block does not return a value in all control paths">;
+ def err_falloff_nonvoid_block : Error<
+   "non-void block does not return a value">;
+ def warn_maybe_falloff_nonvoid_coroutine : Warning<
+   "non-void coroutine does not return a value in all control paths">,
+   InGroup<ReturnType>;
+ def warn_falloff_nonvoid_coroutine : Warning<
+   "non-void coroutine does not return a value">,
+   InGroup<ReturnType>;
+ def warn_suggest_noreturn_function : Warning<
+   "%select{function|method}0 %1 could be declared with attribute 'noreturn'">,
+   InGroup<MissingNoreturn>, DefaultIgnore;
+ def warn_suggest_noreturn_block : Warning<
+   "block could be declared with attribute 'noreturn'">,
+   InGroup<MissingNoreturn>, DefaultIgnore;
+ 
+ // Unreachable code.
+ def warn_unreachable : Warning<
+   "code will never be executed">,
+   InGroup<UnreachableCode>, DefaultIgnore;
+ def warn_unreachable_break : Warning<
+   "'break' will never be executed">,
+   InGroup<UnreachableCodeBreak>, DefaultIgnore;
+ def warn_unreachable_return : Warning<
+   "'return' will never be executed">,
+   InGroup<UnreachableCodeReturn>, DefaultIgnore;
+ def warn_unreachable_loop_increment : Warning<
+   "loop will run at most once (loop increment never executed)">,
+   InGroup<UnreachableCodeLoopIncrement>, DefaultIgnore;
+ def warn_unreachable_fallthrough_attr : Warning<
+   "fallthrough annotation in unreachable code">,
+   InGroup<UnreachableCodeFallthrough>, DefaultIgnore;
+ def note_unreachable_silence : Note<
+   "silence by adding parentheses to mark code as explicitly dead">;
+ 
+ /// Built-in functions.
+ def ext_implicit_lib_function_decl : ExtWarn<
+   "implicitly declaring library function '%0' with type %1">,
+   InGroup<ImplicitFunctionDeclare>;
+ def note_include_header_or_declare : Note<
+   "include the header <%0> or explicitly provide a declaration for '%1'">;
+ def note_previous_builtin_declaration : Note<"%0 is a builtin with type %1">;
+ def warn_implicit_decl_no_jmp_buf
+     : Warning<"declaration of built-in function '%0' requires the declaration"
+     " of the 'jmp_buf' type, commonly provided in the header <setjmp.h>.">,
+       InGroup<DiagGroup<"incomplete-setjmp-declaration">>;
+ def warn_implicit_decl_requires_sysheader : Warning<
+   "declaration of built-in function '%1' requires inclusion of the header <%0>">,
+   InGroup<BuiltinRequiresHeader>;
+ def warn_redecl_library_builtin : Warning<
+   "incompatible redeclaration of library function %0">,
+   InGroup<DiagGroup<"incompatible-library-redeclaration">>;
+ def err_builtin_definition : Error<"definition of builtin function %0">;
+ def err_builtin_redeclare : Error<"cannot redeclare builtin function %0">;
+ def err_arm_invalid_specialreg : Error<"invalid special register for builtin">;
+ def err_arm_invalid_coproc : Error<"coprocessor %0 must be configured as "
+   "%select{GCP|CDE}1">;
+ def err_invalid_cpu_supports : Error<"invalid cpu feature string for builtin">;
+ def err_invalid_cpu_is : Error<"invalid cpu name for builtin">;
+ def err_invalid_cpu_specific_dispatch_value : Error<
+ "invalid option '%0' for %select{cpu_specific|cpu_dispatch}1">;
+ def warn_builtin_unknown : Warning<"use of unknown builtin %0">,
+   InGroup<ImplicitFunctionDeclare>, DefaultError;
+ def warn_cstruct_memaccess : Warning<
+   "%select{destination for|source of|first operand of|second operand of}0 this "
+   "%1 call is a pointer to record %2 that is not trivial to "
+   "%select{primitive-default-initialize|primitive-copy}3">,
+   InGroup<NonTrivialMemaccess>;
+ def note_nontrivial_field : Note<
+   "field is non-trivial to %select{copy|default-initialize}0">;
+ def err_non_trivial_c_union_in_invalid_context : Error<
+   "cannot %select{"
+   "use type %1 for a function/method parameter|"
+   "use type %1 for function/method return|"
+   "default-initialize an object of type %1|"
+   "declare an automatic variable of type %1|"
+   "copy-initialize an object of type %1|"
+   "assign to a variable of type %1|"
+   "construct an automatic compound literal of type %1|"
+   "capture a variable of type %1|"
+   "cannot use volatile type %1 where it causes an lvalue-to-rvalue conversion"
+   "}3 "
+   "since it %select{contains|is}2 a union that is non-trivial to "
+   "%select{default-initialize|destruct|copy}0">;
+ def note_non_trivial_c_union : Note<
+   "%select{%2 has subobjects that are|%3 has type %2 that is}0 "
+   "non-trivial to %select{default-initialize|destruct|copy}1">;
+ def warn_dyn_class_memaccess : Warning<
+   "%select{destination for|source of|first operand of|second operand of}0 this "
+   "%1 call is a pointer to %select{|class containing a }2dynamic class %3; "
+   "vtable pointer will be %select{overwritten|copied|moved|compared}4">,
+   InGroup<DynamicClassMemaccess>;
+ def note_bad_memaccess_silence : Note<
+   "explicitly cast the pointer to silence this warning">;
+ def warn_sizeof_pointer_expr_memaccess : Warning<
+   "'%0' call operates on objects of type %1 while the size is based on a "
+   "different type %2">,
+   InGroup<SizeofPointerMemaccess>;
+ def warn_sizeof_pointer_expr_memaccess_note : Note<
+   "did you mean to %select{dereference the argument to 'sizeof' (and multiply "
+   "it by the number of elements)|remove the addressof in the argument to "
+   "'sizeof' (and multiply it by the number of elements)|provide an explicit "
+   "length}0?">;
+ def warn_sizeof_pointer_type_memaccess : Warning<
+   "argument to 'sizeof' in %0 call is the same pointer type %1 as the "
+   "%select{destination|source}2; expected %3 or an explicit length">,
+   InGroup<SizeofPointerMemaccess>;
+ def warn_strlcpycat_wrong_size : Warning<
+   "size argument in %0 call appears to be size of the source; "
+   "expected the size of the destination">,
+   InGroup<DiagGroup<"strlcpy-strlcat-size">>;
+ def note_strlcpycat_wrong_size : Note<
+   "change size argument to be the size of the destination">;
+ def warn_memsize_comparison : Warning<
+   "size argument in %0 call is a comparison">,
+   InGroup<DiagGroup<"memsize-comparison">>;
+ def note_memsize_comparison_paren : Note<
+   "did you mean to compare the result of %0 instead?">;
+ def note_memsize_comparison_cast_silence : Note<
+   "explicitly cast the argument to size_t to silence this warning">;
+ def warn_suspicious_sizeof_memset : Warning<
+   "%select{'size' argument to memset is '0'|"
+   "setting buffer to a 'sizeof' expression}0"
+   "; did you mean to transpose the last two arguments?">,
+   InGroup<MemsetTransposedArgs>;
+ def note_suspicious_sizeof_memset_silence : Note<
+   "%select{parenthesize the third argument|"
+   "cast the second argument to 'int'}0 to silence">;
+ def warn_suspicious_bzero_size : Warning<"'size' argument to bzero is '0'">,
+   InGroup<SuspiciousBzero>;
+ def note_suspicious_bzero_size_silence : Note<
+   "parenthesize the second argument to silence">;
+ 
+ def warn_strncat_large_size : Warning<
+   "the value of the size argument in 'strncat' is too large, might lead to a "
+   "buffer overflow">, InGroup<StrncatSize>;
+ def warn_strncat_src_size : Warning<"size argument in 'strncat' call appears "
+   "to be size of the source">, InGroup<StrncatSize>;
+ def warn_strncat_wrong_size : Warning<
+   "the value of the size argument to 'strncat' is wrong">, InGroup<StrncatSize>;
+ def note_strncat_wrong_size : Note<
+   "change the argument to be the free space in the destination buffer minus "
+   "the terminating null byte">;
+ 
+ def warn_assume_side_effects : Warning<
+   "the argument to %0 has side effects that will be discarded">,
+   InGroup<DiagGroup<"assume">>;
+ def warn_assume_attribute_string_unknown : Warning<
+   "unknown assumption string '%0'; attribute is potentially ignored">,
+   InGroup<UnknownAssumption>;
+ def warn_assume_attribute_string_unknown_suggested : Warning<
+   "unknown assumption string '%0' may be misspelled; attribute is potentially "
+   "ignored, did you mean '%1'?">,
+   InGroup<MisspelledAssumption>;
+ 
+ def warn_builtin_chk_overflow : Warning<
+   "'%0' will always overflow; destination buffer has size %1,"
+   " but size argument is %2">,
+   InGroup<DiagGroup<"builtin-memcpy-chk-size">>;
+ 
+ def warn_fortify_source_overflow
+   : Warning<warn_builtin_chk_overflow.Text>, InGroup<FortifySource>;
+ def warn_fortify_source_size_mismatch : Warning<
+   "'%0' size argument is too large; destination buffer has size %1,"
+   " but size argument is %2">, InGroup<FortifySource>;
+ 
+ def warn_fortify_strlen_overflow: Warning<
+   "'%0' will always overflow; destination buffer has size %1,"
+   " but the source string has length %2 (including NUL byte)">,
+   InGroup<FortifySource>;
+ 
+ def warn_fortify_source_format_overflow : Warning<
+   "'%0' will always overflow; destination buffer has size %1,"
+   " but format string expands to at least %2">,
+   InGroup<FortifySource>;
+ 
+ 
+ /// main()
+ // static main() is not an error in C, just in C++.
+ def warn_static_main : Warning<"'main' should not be declared static">,
+     InGroup<Main>;
+ def err_static_main : Error<"'main' is not allowed to be declared static">;
+ def err_inline_main : Error<"'main' is not allowed to be declared inline">;
+ def ext_variadic_main : ExtWarn<
+   "'main' is not allowed to be declared variadic">, InGroup<Main>;
+ def ext_noreturn_main : ExtWarn<
+   "'main' is not allowed to be declared _Noreturn">, InGroup<Main>;
+ def note_main_remove_noreturn : Note<"remove '_Noreturn'">;
+ def err_constexpr_main : Error<
+   "'main' is not allowed to be declared %select{constexpr|consteval}0">;
+ def err_deleted_main : Error<"'main' is not allowed to be deleted">;
+ def err_mainlike_template_decl : Error<"%0 cannot be a template">;
+ def err_main_returns_nonint : Error<"'main' must return 'int'">;
+ def ext_main_returns_nonint : ExtWarn<"return type of 'main' is not 'int'">,
+     InGroup<MainReturnType>;
+ def note_main_change_return_type : Note<"change return type to 'int'">;
+ def err_main_surplus_args : Error<"too many parameters (%0) for 'main': "
+     "must be 0, 2, or 3">;
+ def warn_main_one_arg : Warning<"only one parameter on 'main' declaration">,
+     InGroup<Main>;
+ def err_main_arg_wrong : Error<"%select{first|second|third|fourth}0 "
+     "parameter of 'main' (%select{argument count|argument array|environment|"
+     "platform-specific data}0) must be of type %1">;
+ def warn_main_returns_bool_literal : Warning<"bool literal returned from "
+     "'main'">, InGroup<Main>;
+ def err_main_global_variable :
+     Error<"main cannot be declared as global variable">;
+ def warn_main_redefined : Warning<"variable named 'main' with external linkage "
+     "has undefined behavior">, InGroup<Main>;
+ def ext_main_used : Extension<
+   "ISO C++ does not allow 'main' to be used by a program">, InGroup<Main>;
+ 
+ /// parser diagnostics
+ def ext_no_declarators : ExtWarn<"declaration does not declare anything">,
+   InGroup<MissingDeclarations>;
+ def err_no_declarators : Error<"declaration does not declare anything">;
+ def ext_typedef_without_a_name : ExtWarn<"typedef requires a name">,
+   InGroup<MissingDeclarations>;
+ def err_typedef_not_identifier : Error<"typedef name must be an identifier">;
+ 
+ def ext_non_c_like_anon_struct_in_typedef : ExtWarn<
+   "anonymous non-C-compatible type given name for linkage purposes "
+   "by %select{typedef|alias}0 declaration; "
+   "add a tag name here">, InGroup<DiagGroup<"non-c-typedef-for-linkage">>;
+ def err_non_c_like_anon_struct_in_typedef : Error<
+   "anonymous non-C-compatible type given name for linkage purposes "
+   "by %select{typedef|alias}0 declaration after its linkage was computed; "
+   "add a tag name here to establish linkage prior to definition">;
+ def err_typedef_changes_linkage : Error<
+   "unsupported: anonymous type given name for linkage purposes "
+   "by %select{typedef|alias}0 declaration after its linkage was computed; "
+   "add a tag name here to establish linkage prior to definition">;
+ def note_non_c_like_anon_struct : Note<
+   "type is not C-compatible due to this "
+   "%select{base class|default member initializer|lambda expression|"
+   "friend declaration|member declaration}0">;
+ def note_typedef_for_linkage_here : Note<
+   "type is given name %0 for linkage purposes by this "
+   "%select{typedef|alias}1 declaration">;
+ 
+ def err_statically_allocated_object : Error<
+   "interface type cannot be statically allocated">;
+ def err_object_cannot_be_passed_returned_by_value : Error<
+   "interface type %1 cannot be %select{returned|passed}0 by value"
+   "; did you forget * in %1?">;
+ def err_parameters_retval_cannot_have_fp16_type : Error<
+   "%select{parameters|function return value}0 cannot have __fp16 type; did you forget * ?">;
+ def err_opencl_half_load_store : Error<
+   "%select{loading directly from|assigning directly to}0 pointer to type %1 requires "
+   "cl_khr_fp16. Use vector data %select{load|store}0 builtin functions instead">;
+ def err_opencl_cast_to_half : Error<"casting to type %0 is not allowed">;
+ def err_opencl_half_declaration : Error<
+   "declaring variable of type %0 is not allowed">;
+ def err_opencl_invalid_param : Error<
+   "declaring function parameter of type %0 is not allowed%select{; did you forget * ?|}1">;
+ def err_opencl_invalid_return : Error<
+   "declaring function return value of type %0 is not allowed %select{; did you forget * ?|}1">;
+ def warn_enum_value_overflow : Warning<"overflow in enumeration value">;
+ def warn_pragma_options_align_reset_failed : Warning<
+   "#pragma options align=reset failed: %0">,
+   InGroup<IgnoredPragmas>;
+ def err_pragma_options_align_mac68k_target_unsupported : Error<
+   "mac68k alignment pragma is not supported on this target">;
+ def warn_pragma_pack_invalid_alignment : Warning<
+   "expected #pragma pack parameter to be '1', '2', '4', '8', or '16'">,
+   InGroup<IgnoredPragmas>;
+ def err_pragma_pack_invalid_alignment : Error<
+   warn_pragma_pack_invalid_alignment.Text>;
+ def warn_pragma_pack_non_default_at_include : Warning<
+   "non-default #pragma pack value changes the alignment of struct or union "
+   "members in the included file">, InGroup<PragmaPackSuspiciousInclude>,
+   DefaultIgnore;
+ def warn_pragma_pack_modified_after_include : Warning<
+   "the current #pragma pack alignment value is modified in the included "
+   "file">, InGroup<PragmaPack>;
+ def warn_pragma_pack_no_pop_eof : Warning<"unterminated "
+   "'#pragma pack (push, ...)' at end of file">, InGroup<PragmaPack>;
+ def note_pragma_pack_here : Note<
+   "previous '#pragma pack' directive that modifies alignment is here">;
+ def note_pragma_pack_pop_instead_reset : Note<
+   "did you intend to use '#pragma pack (pop)' instead of '#pragma pack()'?">;
+ // Follow the Microsoft implementation.
+ def warn_pragma_pack_show : Warning<"value of #pragma pack(show) == %0">;
+ def warn_pragma_pack_pop_identifier_and_alignment : Warning<
+   "specifying both a name and alignment to 'pop' is undefined">;
+ def warn_pragma_pop_failed : Warning<"#pragma %0(pop, ...) failed: %1">,
+   InGroup<IgnoredPragmas>;
+ def err_pragma_fc_pp_scope : Error<
+   "'#pragma float_control push/pop' can only appear at file or namespace scope "
+   "or within a language linkage specification">;
+ def err_pragma_fc_noprecise_requires_nofenv : Error<
+   "'#pragma float_control(precise, off)' is illegal when fenv_access is enabled">;
+ def err_pragma_fc_except_requires_precise : Error<
+   "'#pragma float_control(except, on)' is illegal when precise is disabled">;
+ def err_pragma_fc_noprecise_requires_noexcept : Error<
+   "'#pragma float_control(precise, off)' is illegal when except is enabled">;
+ def err_pragma_fenv_requires_precise : Error<
+   "'#pragma STDC FENV_ACCESS ON' is illegal when precise is disabled">;
+ def warn_cxx_ms_struct :
+   Warning<"ms_struct may not produce Microsoft-compatible layouts for classes "
+           "with base classes or virtual functions">,
+   DefaultError, InGroup<IncompatibleMSStruct>;
+ def err_pragma_pack_identifer_not_supported : Error<
+   "specifying an identifier within `#pragma pack` is not supported on this target">;
+ def err_section_conflict : Error<"%0 causes a section type conflict with %1">;
+ def err_no_base_classes : Error<"invalid use of '__super', %0 has no base classes">;
+ def err_invalid_super_scope : Error<"invalid use of '__super', "
+   "this keyword can only be used inside class or member function scope">;
+ def err_super_in_lambda_unsupported : Error<
+   "use of '__super' inside a lambda is unsupported">;
+ 
+ def warn_pragma_unused_undeclared_var : Warning<
+   "undeclared variable %0 used as an argument for '#pragma unused'">,
+   InGroup<IgnoredPragmas>;
+ def warn_atl_uuid_deprecated : Warning<
+   "specifying 'uuid' as an ATL attribute is deprecated; use __declspec instead">,
+   InGroup<DeprecatedDeclarations>;
+ def warn_pragma_unused_expected_var_arg : Warning<
+   "only variables can be arguments to '#pragma unused'">,
+   InGroup<IgnoredPragmas>;
+ def err_pragma_push_visibility_mismatch : Error<
+   "#pragma visibility push with no matching #pragma visibility pop">;
+ def note_surrounding_namespace_ends_here : Note<
+   "surrounding namespace with visibility attribute ends here">;
+ def err_pragma_pop_visibility_mismatch : Error<
+   "#pragma visibility pop with no matching #pragma visibility push">;
+ def note_surrounding_namespace_starts_here : Note<
+   "surrounding namespace with visibility attribute starts here">;
+ def err_pragma_loop_invalid_argument_type : Error<
+   "invalid argument of type %0; expected an integer type">;
+ def err_pragma_loop_invalid_argument_value : Error<
+   "%select{invalid value '%0'; must be positive|value '%0' is too large}1">;
+ def err_pragma_loop_compatibility : Error<
+   "%select{incompatible|duplicate}0 directives '%1' and '%2'">;
+ def err_pragma_loop_precedes_nonloop : Error<
+   "expected a for, while, or do-while loop to follow '%0'">;
+ 
+ def err_pragma_attribute_matcher_subrule_contradicts_rule : Error<
+   "redundant attribute subject matcher sub-rule '%0'; '%1' already matches "
+   "those declarations">;
+ def err_pragma_attribute_matcher_negated_subrule_contradicts_subrule : Error<
+   "negated attribute subject matcher sub-rule '%0' contradicts sub-rule '%1'">;
+ def err_pragma_attribute_invalid_matchers : Error<
+   "attribute %0 can't be applied to %1">;
+ def err_pragma_attribute_stack_mismatch : Error<
+   "'#pragma clang attribute %select{%1.|}0pop' with no matching"
+   " '#pragma clang attribute %select{%1.|}0push'">;
+ def warn_pragma_attribute_unused : Warning<
+   "unused attribute %0 in '#pragma clang attribute push' region">,
+   InGroup<PragmaClangAttribute>;
+ def note_pragma_attribute_region_ends_here : Note<
+   "'#pragma clang attribute push' regions ends here">;
+ def err_pragma_attribute_no_pop_eof : Error<"unterminated "
+   "'#pragma clang attribute push' at end of file">;
+ def note_pragma_attribute_applied_decl_here : Note<
+   "when applied to this declaration">;
+ def err_pragma_attr_attr_no_push : Error<
+   "'#pragma clang attribute' attribute with no matching "
+   "'#pragma clang attribute push'">;
+ 
+ /// Objective-C parser diagnostics
+ def err_duplicate_class_def : Error<
+   "duplicate interface definition for class %0">;
+ def err_undef_superclass : Error<
+   "cannot find interface declaration for %0, superclass of %1">;
+ def err_forward_superclass : Error<
+   "attempting to use the forward class %0 as superclass of %1">;
+ def err_no_nsconstant_string_class : Error<
+   "cannot find interface declaration for %0">;
+ def err_recursive_superclass : Error<
+   "trying to recursively use %0 as superclass of %1">;
+ def err_conflicting_aliasing_type : Error<"conflicting types for alias %0">;
+ def warn_undef_interface : Warning<"cannot find interface declaration for %0">;
+ def warn_duplicate_protocol_def : Warning<
+   "duplicate protocol definition of %0 is ignored">,
+   InGroup<DiagGroup<"duplicate-protocol">>;
+ def err_protocol_has_circular_dependency : Error<
+   "protocol has circular dependency">;
+ def err_undeclared_protocol : Error<"cannot find protocol declaration for %0">;
+ def warn_undef_protocolref : Warning<"cannot find protocol definition for %0">;
+ def err_atprotocol_protocol : Error<
+   "@protocol is using a forward protocol declaration of %0">;
+ def warn_readonly_property : Warning<
+   "attribute 'readonly' of property %0 restricts attribute "
+   "'readwrite' of property inherited from %1">,
+   InGroup<PropertyAttr>;
+ 
+ def warn_property_attribute : Warning<
+   "'%1' attribute on property %0 does not match the property inherited from %2">,
+   InGroup<PropertyAttr>;
+ def warn_property_types_are_incompatible : Warning<
+   "property type %0 is incompatible with type %1 inherited from %2">,
+   InGroup<DiagGroup<"incompatible-property-type">>;
+ def warn_protocol_property_mismatch : Warning<
+   "property %select{of type %1|with attribute '%1'|without attribute '%1'|with "
+   "getter %1|with setter %1}0 was selected for synthesis">,
+   InGroup<DiagGroup<"protocol-property-synthesis-ambiguity">>;
+ def err_protocol_property_mismatch: Error<warn_protocol_property_mismatch.Text>;
+ def err_undef_interface : Error<"cannot find interface declaration for %0">;
+ def err_category_forward_interface : Error<
+   "cannot define %select{category|class extension}0 for undefined class %1">;
+ def err_class_extension_after_impl : Error<
+   "cannot declare class extension for %0 after class implementation">;
+ def note_implementation_declared : Note<
+   "class implementation is declared here">;
+ def note_while_in_implementation : Note<
+   "detected while default synthesizing properties in class implementation">;
+ def note_class_declared : Note<
+   "class is declared here">;
+ def note_receiver_class_declared : Note<
+   "receiver is instance of class declared here">;
+ def note_receiver_expr_here : Note<
+@@ -6429,1998 +6430,2001 @@ def warn_shift_negative : Warning<"shift count is negative">,
+ def warn_shift_gt_typewidth : Warning<"shift count >= width of type">,
+   InGroup<DiagGroup<"shift-count-overflow">>;
+ def warn_shift_result_gt_typewidth : Warning<
+   "signed shift result (%0) requires %1 bits to represent, but %2 only has "
+   "%3 bits">, InGroup<DiagGroup<"shift-overflow">>;
+ def warn_shift_result_sets_sign_bit : Warning<
+   "signed shift result (%0) sets the sign bit of the shift expression's "
+   "type (%1) and becomes negative">,
+   InGroup<DiagGroup<"shift-sign-overflow">>, DefaultIgnore;
+ 
+ def warn_precedence_bitwise_rel : Warning<
+   "%0 has lower precedence than %1; %1 will be evaluated first">,
+   InGroup<Parentheses>;
+ def note_precedence_bitwise_first : Note<
+   "place parentheses around the %0 expression to evaluate it first">;
+ def note_precedence_silence : Note<
+   "place parentheses around the '%0' expression to silence this warning">;
+ 
+ def warn_precedence_conditional : Warning<
+   "operator '?:' has lower precedence than '%0'; '%0' will be evaluated first">,
+   InGroup<Parentheses>;
+ def warn_precedence_bitwise_conditional : Warning<
+   "operator '?:' has lower precedence than '%0'; '%0' will be evaluated first">,
+   InGroup<BitwiseConditionalParentheses>;
+ def note_precedence_conditional_first : Note<
+   "place parentheses around the '?:' expression to evaluate it first">;
+ 
+ def warn_enum_constant_in_bool_context : Warning<
+   "converting the enum constant to a boolean">,
+   InGroup<IntInBoolContext>, DefaultIgnore;
+ def warn_left_shift_in_bool_context : Warning<
+   "converting the result of '<<' to a boolean; did you mean '(%0) != 0'?">,
+   InGroup<IntInBoolContext>, DefaultIgnore;
+ def warn_logical_instead_of_bitwise : Warning<
+   "use of logical '%0' with constant operand">,
+   InGroup<DiagGroup<"constant-logical-operand">>;
+ def note_logical_instead_of_bitwise_change_operator : Note<
+   "use '%0' for a bitwise operation">;
+ def note_logical_instead_of_bitwise_remove_constant : Note<
+   "remove constant to silence this warning">;
+ 
+ def warn_bitwise_op_in_bitwise_op : Warning<
+   "'%0' within '%1'">, InGroup<BitwiseOpParentheses>, DefaultIgnore;
+ 
+ def warn_logical_and_in_logical_or : Warning<
+   "'&&' within '||'">, InGroup<LogicalOpParentheses>, DefaultIgnore;
+ 
+ def warn_overloaded_shift_in_comparison :Warning<
+   "overloaded operator %select{>>|<<}0 has higher precedence than "
+   "comparison operator">,
+   InGroup<OverloadedShiftOpParentheses>;
+ def note_evaluate_comparison_first :Note<
+   "place parentheses around comparison expression to evaluate it first">;
+ 
+ def note_concatenated_string_literal_silence :Note<
+   "place parentheses around the string literal to silence warning">;
+ 
+ def warn_addition_in_bitshift : Warning<
+   "operator '%0' has lower precedence than '%1'; "
+   "'%1' will be evaluated first">, InGroup<ShiftOpParentheses>;
+ 
+ def warn_self_assignment_builtin : Warning<
+   "explicitly assigning value of variable of type %0 to itself">,
+   InGroup<SelfAssignment>, DefaultIgnore;
+ def warn_self_assignment_overloaded : Warning<
+   "explicitly assigning value of variable of type %0 to itself">,
+   InGroup<SelfAssignmentOverloaded>, DefaultIgnore;
+ def warn_self_move : Warning<
+   "explicitly moving variable of type %0 to itself">,
+   InGroup<SelfMove>, DefaultIgnore;
+ 
+ def warn_redundant_move_on_return : Warning<
+   "redundant move in return statement">,
+   InGroup<RedundantMove>, DefaultIgnore;
+ def warn_pessimizing_move_on_return : Warning<
+   "moving a local object in a return statement prevents copy elision">,
+   InGroup<PessimizingMove>, DefaultIgnore;
+ def warn_pessimizing_move_on_initialization : Warning<
+   "moving a temporary object prevents copy elision">,
+   InGroup<PessimizingMove>, DefaultIgnore;
+ def note_remove_move : Note<"remove std::move call here">;
+ 
+ def warn_string_plus_int : Warning<
+   "adding %0 to a string does not append to the string">,
+   InGroup<StringPlusInt>;
+ def warn_string_plus_char : Warning<
+   "adding %0 to a string pointer does not append to the string">,
+   InGroup<StringPlusChar>;
+ def note_string_plus_scalar_silence : Note<
+   "use array indexing to silence this warning">;
+ 
+ def warn_sizeof_array_param : Warning<
+   "sizeof on array function parameter will return size of %0 instead of %1">,
+   InGroup<SizeofArrayArgument>;
+ 
+ def warn_sizeof_array_decay : Warning<
+   "sizeof on pointer operation will return size of %0 instead of %1">,
+   InGroup<SizeofArrayDecay>;
+ 
+ def err_sizeof_nonfragile_interface : Error<
+   "application of '%select{alignof|sizeof}1' to interface %0 is "
+   "not supported on this architecture and platform">;
+ def err_atdef_nonfragile_interface : Error<
+   "use of @defs is not supported on this architecture and platform">;
+ def err_subscript_nonfragile_interface : Error<
+   "subscript requires size of interface %0, which is not constant for "
+   "this architecture and platform">;
+ 
+ def err_arithmetic_nonfragile_interface : Error<
+   "arithmetic on pointer to interface %0, which is not a constant size for "
+   "this architecture and platform">;
+ 
+ def warn_deprecated_comma_subscript : Warning<
+   "top-level comma expression in array subscript is deprecated">,
+   InGroup<DeprecatedCommaSubscript>;
+ 
+ def ext_subscript_non_lvalue : Extension<
+   "ISO C90 does not allow subscripting non-lvalue array">;
+ def err_typecheck_subscript_value : Error<
+   "subscripted value is not an array, pointer, or vector">;
+ def err_typecheck_subscript_not_integer : Error<
+   "array subscript is not an integer">;
+ def err_subscript_function_type : Error<
+   "subscript of pointer to function type %0">;
+ def err_subscript_incomplete_or_sizeless_type : Error<
+   "subscript of pointer to %select{incomplete|sizeless}0 type %1">;
+ def err_dereference_incomplete_type : Error<
+   "dereference of pointer to incomplete type %0">;
+ def ext_gnu_subscript_void_type : Extension<
+   "subscript of a pointer to void is a GNU extension">, InGroup<PointerArith>;
+ def err_typecheck_member_reference_struct_union : Error<
+   "member reference base type %0 is not a structure or union">;
+ def err_typecheck_member_reference_ivar : Error<
+   "%0 does not have a member named %1">;
+ def err_arc_weak_ivar_access : Error<
+   "dereferencing a __weak pointer is not allowed due to possible "
+   "null value caused by race condition, assign it to strong variable first">;
+ def err_typecheck_member_reference_arrow : Error<
+   "member reference type %0 is not a pointer">;
+ def err_typecheck_member_reference_suggestion : Error<
+   "member reference type %0 is %select{a|not a}1 pointer; did you mean to use '%select{->|.}1'?">;
+ def note_typecheck_member_reference_suggestion : Note<
+   "did you mean to use '.' instead?">;
+ def note_member_reference_arrow_from_operator_arrow : Note<
+   "'->' applied to return value of the operator->() declared here">;
+ def err_typecheck_member_reference_type : Error<
+   "cannot refer to type member %0 in %1 with '%select{.|->}2'">;
+ def err_typecheck_member_reference_unknown : Error<
+   "cannot refer to member %0 in %1 with '%select{.|->}2'">;
+ def err_member_reference_needs_call : Error<
+   "base of member reference is a function; perhaps you meant to call "
+   "it%select{| with no arguments}0?">;
+ def warn_subscript_is_char : Warning<"array subscript is of type 'char'">,
+   InGroup<CharSubscript>, DefaultIgnore;
+ 
+ def err_typecheck_incomplete_tag : Error<"incomplete definition of type %0">;
+ def err_no_member : Error<"no member named %0 in %1">;
+ def err_no_member_overloaded_arrow : Error<
+   "no member named %0 in %1; did you mean to use '->' instead of '.'?">;
+ 
+ def err_member_not_yet_instantiated : Error<
+   "no member %0 in %1; it has not yet been instantiated">;
+ def note_non_instantiated_member_here : Note<
+   "not-yet-instantiated member is declared here">;
+ 
+ def err_enumerator_does_not_exist : Error<
+   "enumerator %0 does not exist in instantiation of %1">;
+ def note_enum_specialized_here : Note<
+   "enum %0 was explicitly specialized here">;
+ 
+ def err_specialization_not_primary_template : Error<
+   "cannot reference member of primary template because deduced class "
+   "template specialization %0 is %select{instantiated from a partial|"
+   "an explicit}1 specialization">;
+ 
+ def err_member_redeclared : Error<"class member cannot be redeclared">;
+ def ext_member_redeclared : ExtWarn<"class member cannot be redeclared">,
+   InGroup<RedeclaredClassMember>;
+ def err_member_redeclared_in_instantiation : Error<
+   "multiple overloads of %0 instantiate to the same signature %1">;
+ def err_member_name_of_class : Error<"member %0 has the same name as its class">;
+ def err_member_def_undefined_record : Error<
+   "out-of-line definition of %0 from class %1 without definition">;
+ def err_member_decl_does_not_match : Error<
+   "out-of-line %select{declaration|definition}2 of %0 "
+   "does not match any declaration in %1">;
+ def err_friend_decl_with_def_arg_must_be_def : Error<
+   "friend declaration specifying a default argument must be a definition">;
+ def err_friend_decl_with_def_arg_redeclared : Error<
+   "friend declaration specifying a default argument must be the only declaration">;
+ def err_friend_decl_does_not_match : Error<
+   "friend declaration of %0 does not match any declaration in %1">;
+ def err_member_decl_does_not_match_suggest : Error<
+   "out-of-line %select{declaration|definition}2 of %0 "
+   "does not match any declaration in %1; did you mean %3?">;
+ def err_member_def_does_not_match_ret_type : Error<
+   "return type of out-of-line definition of %q0 differs from "
+   "that in the declaration">;
+ def err_nonstatic_member_out_of_line : Error<
+   "non-static data member defined out-of-line">;
+ def err_qualified_typedef_declarator : Error<
+   "typedef declarator cannot be qualified">;
+ def err_qualified_param_declarator : Error<
+   "parameter declarator cannot be qualified">;
+ def ext_out_of_line_declaration : ExtWarn<
+   "out-of-line declaration of a member must be a definition">,
+   InGroup<OutOfLineDeclaration>, DefaultError;
+ def err_member_extra_qualification : Error<
+   "extra qualification on member %0">;
+ def warn_member_extra_qualification : Warning<
+   err_member_extra_qualification.Text>, InGroup<MicrosoftExtraQualification>;
+ def warn_namespace_member_extra_qualification : Warning<
+   "extra qualification on member %0">,
+   InGroup<DiagGroup<"extra-qualification">>;
+ def err_member_qualification : Error<
+   "non-friend class member %0 cannot have a qualified name">;
+ def note_member_def_close_match : Note<"member declaration nearly matches">;
+ def note_member_def_close_const_match : Note<
+   "member declaration does not match because "
+   "it %select{is|is not}0 const qualified">;
+ def note_member_def_close_param_match : Note<
+   "type of %ordinal0 parameter of member declaration does not match definition"
+   "%diff{ ($ vs $)|}1,2">;
+ def note_local_decl_close_match : Note<"local declaration nearly matches">;
+ def note_local_decl_close_param_match : Note<
+   "type of %ordinal0 parameter of local declaration does not match definition"
+   "%diff{ ($ vs $)|}1,2">;
+ def err_typecheck_ivar_variable_size : Error<
+   "instance variables must have a constant size">;
+ def err_ivar_reference_type : Error<
+   "instance variables cannot be of reference type">;
+ def err_typecheck_illegal_increment_decrement : Error<
+   "cannot %select{decrement|increment}1 value of type %0">;
+ def err_typecheck_expect_int : Error<
+   "used type %0 where integer is required">;
+ def err_typecheck_arithmetic_incomplete_or_sizeless_type : Error<
+   "arithmetic on a pointer to %select{an incomplete|sizeless}0 type %1">;
+ def err_typecheck_pointer_arith_function_type : Error<
+   "arithmetic on%select{ a|}0 pointer%select{|s}0 to%select{ the|}2 "
+   "function type%select{|s}2 %1%select{| and %3}2">;
+ def err_typecheck_pointer_arith_void_type : Error<
+   "arithmetic on%select{ a|}0 pointer%select{|s}0 to void">;
+ def err_typecheck_decl_incomplete_type : Error<
+   "variable has incomplete type %0">;
+ def ext_typecheck_decl_incomplete_type : ExtWarn<
+   "tentative definition of variable with internal linkage has incomplete non-array type %0">,
+   InGroup<DiagGroup<"tentative-definition-incomplete-type">>;
+ def err_tentative_def_incomplete_type : Error<
+   "tentative definition has type %0 that is never completed">;
+ def warn_tentative_incomplete_array : Warning<
+   "tentative array definition assumed to have one element">;
+ def err_typecheck_incomplete_array_needs_initializer : Error<
+   "definition of variable with array type needs an explicit size "
+   "or an initializer">;
+ def err_array_init_not_init_list : Error<
+   "array initializer must be an initializer "
+   "list%select{| or string literal| or wide string literal}0">;
+ def err_array_init_narrow_string_into_wchar : Error<
+   "initializing wide char array with non-wide string literal">;
+ def err_array_init_wide_string_into_char : Error<
+   "initializing char array with wide string literal">;
+ def err_array_init_incompat_wide_string_into_wchar : Error<
+   "initializing wide char array with incompatible wide string literal">;
+ def err_array_init_plain_string_into_char8_t : Error<
+   "initializing 'char8_t' array with plain string literal">;
+ def note_array_init_plain_string_into_char8_t : Note<
+   "add 'u8' prefix to form a 'char8_t' string literal">;
+ def err_array_init_utf8_string_into_char : Error<
+   "%select{|ISO C++20 does not permit }0initialization of char array with "
+   "UTF-8 string literal%select{ is not permitted by '-fchar8_t'|}0">;
+ def warn_cxx20_compat_utf8_string : Warning<
+   "type of UTF-8 string literal will change from array of const char to "
+   "array of const char8_t in C++20">, InGroup<CXX20Compat>, DefaultIgnore;
+ def note_cxx20_compat_utf8_string_remove_u8 : Note<
+   "remove 'u8' prefix to avoid a change of behavior; "
+   "Clang encodes unprefixed narrow string literals as UTF-8">;
+ def err_array_init_different_type : Error<
+   "cannot initialize array %diff{of type $ with array of type $|"
+   "with different type of array}0,1">;
+ def err_array_init_non_constant_array : Error<
+   "cannot initialize array %diff{of type $ with non-constant array of type $|"
+   "with different type of array}0,1">;
+ def ext_array_init_copy : Extension<
+   "initialization of an array "
+   "%diff{of type $ from a compound literal of type $|"
+   "from a compound literal}0,1 is a GNU extension">, InGroup<GNUCompoundLiteralInitializer>;
+ // This is intentionally not disabled by -Wno-gnu.
+ def ext_array_init_parens : ExtWarn<
+   "parenthesized initialization of a member array is a GNU extension">,
+   InGroup<DiagGroup<"gnu-array-member-paren-init">>, DefaultError;
+ def warn_deprecated_string_literal_conversion : Warning<
+   "conversion from string literal to %0 is deprecated">,
+   InGroup<CXX11CompatDeprecatedWritableStr>;
+ def ext_deprecated_string_literal_conversion : ExtWarn<
+   "ISO C++11 does not allow conversion from string literal to %0">,
+   InGroup<WritableStrings>, SFINAEFailure;
+ def err_realimag_invalid_type : Error<"invalid type %0 to %1 operator">;
+ def err_typecheck_sclass_fscope : Error<
+   "illegal storage class on file-scoped variable">;
+ def warn_standalone_specifier : Warning<"'%0' ignored on this declaration">,
+   InGroup<MissingDeclarations>;
+ def ext_standalone_specifier : ExtWarn<"'%0' is not permitted on a declaration "
+   "of a type">, InGroup<MissingDeclarations>;
+ def err_standalone_class_nested_name_specifier : Error<
+   "forward declaration of %select{class|struct|interface|union|enum}0 cannot "
+   "have a nested name specifier">;
+ def err_typecheck_sclass_func : Error<"illegal storage class on function">;
+ def err_static_block_func : Error<
+   "function declared in block scope cannot have 'static' storage class">;
+ def err_typecheck_address_of : Error<"address of %select{bit-field"
+   "|vector element|property expression|register variable|matrix element}0 requested">;
+ def ext_typecheck_addrof_void : Extension<
+   "ISO C forbids taking the address of an expression of type 'void'">;
+ def err_unqualified_pointer_member_function : Error<
+   "must explicitly qualify name of member function when taking its address">;
+ def err_invalid_form_pointer_member_function : Error<
+   "cannot create a non-constant pointer to member function">;
+ def err_address_of_function_with_pass_object_size_params: Error<
+   "cannot take address of function %0 because parameter %1 has "
+   "pass_object_size attribute">;
+ def err_parens_pointer_member_function : Error<
+   "cannot parenthesize the name of a method when forming a member pointer">;
+ def err_typecheck_invalid_lvalue_addrof_addrof_function : Error<
+   "extra '&' taking address of overloaded function">;
+ def err_typecheck_invalid_lvalue_addrof : Error<
+   "cannot take the address of an rvalue of type %0">;
+ def ext_typecheck_addrof_temporary : ExtWarn<
+   "taking the address of a temporary object of type %0">,
+   InGroup<AddressOfTemporary>, DefaultError;
+ def err_typecheck_addrof_temporary : Error<
+   "taking the address of a temporary object of type %0">;
+ def err_typecheck_addrof_dtor : Error<
+   "taking the address of a destructor">;
+ def err_typecheck_unary_expr : Error<
+   "invalid argument type %0 to unary expression">;
+ def err_typecheck_indirection_requires_pointer : Error<
+   "indirection requires pointer operand (%0 invalid)">;
+ def ext_typecheck_indirection_through_void_pointer : ExtWarn<
+   "ISO C++ does not allow indirection on operand of type %0">,
+   InGroup<DiagGroup<"void-ptr-dereference">>;
+ def warn_indirection_through_null : Warning<
+   "indirection of non-volatile null pointer will be deleted, not trap">,
+   InGroup<NullDereference>;
+ def warn_binding_null_to_reference : Warning<
+   "binding dereferenced null pointer to reference has undefined behavior">,
+   InGroup<NullDereference>;
+ def note_indirection_through_null : Note<
+   "consider using __builtin_trap() or qualifying pointer with 'volatile'">;
+ def warn_pointer_indirection_from_incompatible_type : Warning<
+   "dereference of type %1 that was reinterpret_cast from type %0 has undefined "
+   "behavior">,
+   InGroup<UndefinedReinterpretCast>, DefaultIgnore;
+ def warn_taking_address_of_packed_member : Warning<
+   "taking address of packed member %0 of class or structure %q1 may result in an unaligned pointer value">,
+   InGroup<DiagGroup<"address-of-packed-member">>;
+ def warn_param_mismatched_alignment : Warning<
+   "passing %0-byte aligned argument to %1-byte aligned parameter %2 of %3 may result in an unaligned pointer access">,
+   InGroup<DiagGroup<"align-mismatch">>;
+ 
+ def err_objc_object_assignment : Error<
+   "cannot assign to class object (%0 invalid)">;
+ def err_typecheck_invalid_operands : Error<
+   "invalid operands to binary expression (%0 and %1)">, Deferrable;
+ def note_typecheck_invalid_operands_converted : Note<
+   "%select{first|second}0 operand was implicitly converted to type %1">;
+ def err_typecheck_logical_vector_expr_gnu_cpp_restrict : Error<
+   "logical expression with vector %select{type %1 and non-vector type %2|types"
+   " %1 and %2}0 is only supported in C++">;
+ def err_typecheck_sub_ptr_compatible : Error<
+   "%diff{$ and $ are not pointers to compatible types|"
+   "pointers to incompatible types}0,1">;
+ def ext_typecheck_ordered_comparison_of_pointer_integer : ExtWarn<
+   "ordered comparison between pointer and integer (%0 and %1)">;
+ def ext_typecheck_ordered_comparison_of_pointer_and_zero : Extension<
+   "ordered comparison between pointer and zero (%0 and %1) is an extension">;
+ def err_typecheck_ordered_comparison_of_pointer_and_zero : Error<
+   "ordered comparison between pointer and zero (%0 and %1)">;
+ def err_typecheck_three_way_comparison_of_pointer_and_zero : Error<
+   "three-way comparison between pointer and zero">;
+ def ext_typecheck_compare_complete_incomplete_pointers : Extension<
+   "pointer comparisons before C11 "
+   "need to be between two complete or two incomplete types; "
+   "%0 is %select{|in}2complete and "
+   "%1 is %select{|in}3complete">,
+   InGroup<C11>;
+ def warn_typecheck_ordered_comparison_of_function_pointers : Warning<
+   "ordered comparison of function pointers (%0 and %1)">,
+   InGroup<OrderedCompareFunctionPointers>;
+ def ext_typecheck_ordered_comparison_of_function_pointers : ExtWarn<
+   "ordered comparison of function pointers (%0 and %1)">,
+   InGroup<OrderedCompareFunctionPointers>;
+ def err_typecheck_ordered_comparison_of_function_pointers : Error<
+   "ordered comparison of function pointers (%0 and %1)">;
+ def ext_typecheck_comparison_of_fptr_to_void : Extension<
+   "equality comparison between function pointer and void pointer (%0 and %1)">;
+ def err_typecheck_comparison_of_fptr_to_void : Error<
+   "equality comparison between function pointer and void pointer (%0 and %1)">;
+ def ext_typecheck_comparison_of_pointer_integer : ExtWarn<
+   "comparison between pointer and integer (%0 and %1)">,
+   InGroup<DiagGroup<"pointer-integer-compare">>;
+ def err_typecheck_comparison_of_pointer_integer : Error<
+   "comparison between pointer and integer (%0 and %1)">;
+ def ext_typecheck_comparison_of_distinct_pointers : ExtWarn<
+   "comparison of distinct pointer types%diff{ ($ and $)|}0,1">,
+   InGroup<CompareDistinctPointerType>;
+ def ext_typecheck_cond_incompatible_operands : ExtWarn<
+   "incompatible operand types (%0 and %1)">;
+ def err_cond_voidptr_arc : Error <
+   "operands to conditional of types%diff{ $ and $|}0,1 are incompatible "
+   "in ARC mode">;
+ def err_typecheck_comparison_of_distinct_pointers : Error<
+   "comparison of distinct pointer types%diff{ ($ and $)|}0,1">;
+ def err_typecheck_op_on_nonoverlapping_address_space_pointers : Error<
+   "%select{comparison between %diff{ ($ and $)|}0,1"
+   "|arithmetic operation with operands of type %diff{ ($ and $)|}0,1"
+   "|conditional operator with the second and third operands of type "
+   "%diff{ ($ and $)|}0,1}2"
+   " which are pointers to non-overlapping address spaces">;
+ 
+ def select_arith_conv_kind : TextSubstitution<
+   "%select{arithmetic between|bitwise operation between|comparison of|"
+   "conditional expression between|compound assignment of}0">;
+ def warn_arith_conv_enum_float : Warning<
+   "%sub{select_arith_conv_kind}0 "
+   "%select{floating-point|enumeration}1 type %2 "
+   "%plural{2:with|4:from|:and}0 "
+   "%select{enumeration|floating-point}1 type %3">,
+   InGroup<EnumFloatConversion>, DefaultIgnore;
+ def warn_arith_conv_enum_float_cxx20 : Warning<
+   "%sub{select_arith_conv_kind}0 "
+   "%select{floating-point|enumeration}1 type %2 "
+   "%plural{2:with|4:from|:and}0 "
+   "%select{enumeration|floating-point}1 type %3 is deprecated">,
+   InGroup<DeprecatedEnumFloatConversion>;
+ def warn_arith_conv_mixed_enum_types : Warning<
+   "%sub{select_arith_conv_kind}0 "
+   "different enumeration types%diff{ ($ and $)|}1,2">,
+   InGroup<EnumEnumConversion>, DefaultIgnore;
+ def warn_arith_conv_mixed_enum_types_cxx20 : Warning<
+   "%sub{select_arith_conv_kind}0 "
+   "different enumeration types%diff{ ($ and $)|}1,2 is deprecated">,
+   InGroup<DeprecatedEnumEnumConversion>;
+ def warn_arith_conv_mixed_anon_enum_types : Warning<
+   warn_arith_conv_mixed_enum_types.Text>,
+   InGroup<AnonEnumEnumConversion>, DefaultIgnore;
+ def warn_arith_conv_mixed_anon_enum_types_cxx20 : Warning<
+   warn_arith_conv_mixed_enum_types_cxx20.Text>,
+   InGroup<DeprecatedAnonEnumEnumConversion>;
+ def warn_conditional_mixed_enum_types : Warning<
+   warn_arith_conv_mixed_enum_types.Text>,
+   InGroup<EnumCompareConditional>, DefaultIgnore;
+ def warn_conditional_mixed_enum_types_cxx20 : Warning<
+   warn_arith_conv_mixed_enum_types_cxx20.Text>,
+   InGroup<DeprecatedEnumCompareConditional>;
+ def warn_comparison_mixed_enum_types : Warning<
+   warn_arith_conv_mixed_enum_types.Text>,
+   InGroup<EnumCompare>;
+ def warn_comparison_mixed_enum_types_cxx20 : Warning<
+   warn_arith_conv_mixed_enum_types_cxx20.Text>,
+   InGroup<DeprecatedEnumCompare>;
+ def warn_comparison_of_mixed_enum_types_switch : Warning<
+   "comparison of different enumeration types in switch statement"
+   "%diff{ ($ and $)|}0,1">,
+   InGroup<EnumCompareSwitch>;
+ 
+ def err_typecheck_assign_const : Error<
+   "%select{"
+   "cannot assign to return value because function %1 returns a const value|"
+   "cannot assign to variable %1 with const-qualified type %2|"
+   "cannot assign to %select{non-|}1static data member %2 "
+   "with const-qualified type %3|"
+   "cannot assign to non-static data member within const member function %1|"
+   "cannot assign to %select{variable %2|non-static data member %2|lvalue}1 "
+   "with %select{|nested }3const-qualified data member %4|"
+   "read-only variable is not assignable}0">;
+ 
+ def note_typecheck_assign_const : Note<
+   "%select{"
+   "function %1 which returns const-qualified type %2 declared here|"
+   "variable %1 declared const here|"
+   "%select{non-|}1static data member %2 declared const here|"
+   "member function %q1 is declared const here|"
+   "%select{|nested }1data member %2 declared const here}0">;
+ 
+ def warn_unsigned_always_true_comparison : Warning<
+   "result of comparison of %select{%3|unsigned expression}0 %2 "
+   "%select{unsigned expression|%3}0 is always %4">,
+   InGroup<TautologicalUnsignedZeroCompare>, DefaultIgnore;
+ def warn_unsigned_char_always_true_comparison : Warning<
+   "result of comparison of %select{%3|char expression}0 %2 "
+   "%select{char expression|%3}0 is always %4, since char is interpreted as "
+   "unsigned">, InGroup<TautologicalUnsignedCharZeroCompare>, DefaultIgnore;
+ def warn_unsigned_enum_always_true_comparison : Warning<
+   "result of comparison of %select{%3|unsigned enum expression}0 %2 "
+   "%select{unsigned enum expression|%3}0 is always %4">,
+   InGroup<TautologicalUnsignedEnumZeroCompare>, DefaultIgnore;
+ def warn_tautological_constant_compare : Warning<
+   "result of comparison %select{%3|%1}0 %2 "
+   "%select{%1|%3}0 is always %4">,
+   InGroup<TautologicalTypeLimitCompare>, DefaultIgnore;
+ def warn_tautological_compare_objc_bool : Warning<
+   "result of comparison of constant %0 with expression of type 'BOOL'"
+   " is always %1, as the only well defined values for 'BOOL' are YES and NO">,
+   InGroup<TautologicalObjCBoolCompare>;
+ def subst_int_range : TextSubstitution<"%0-bit %select{signed|unsigned}1 value">;
+ def warn_tautological_compare_value_range : Warning<
+   "result of comparison of "
+   "%select{%4|%sub{subst_int_range}1,2}0 %3 "
+   "%select{%sub{subst_int_range}1,2|%4}0 is always %5">,
+   InGroup<TautologicalValueRangeCompare>, DefaultIgnore;
+ 
+ def warn_mixed_sign_comparison : Warning<
+   "comparison of integers of different signs: %0 and %1">,
+   InGroup<SignCompare>, DefaultIgnore;
+ def warn_out_of_range_compare : Warning<
+   "result of comparison of %select{constant %0|true|false}1 with "
+   "%select{expression of type %2|boolean expression}3 is always %4">,
+   InGroup<TautologicalOutOfRangeCompare>;
+ def warn_tautological_bool_compare : Warning<warn_out_of_range_compare.Text>,
+   InGroup<TautologicalConstantCompare>;
+ def warn_integer_constants_in_conditional_always_true : Warning<
+   "converting the result of '?:' with integer constants to a boolean always "
+   "evaluates to 'true'">,
+   InGroup<TautologicalConstantCompare>;
+ def warn_left_shift_always : Warning<
+   "converting the result of '<<' to a boolean always evaluates "
+   "to %select{false|true}0">,
+   InGroup<TautologicalConstantCompare>;
+ def warn_null_in_arithmetic_operation : Warning<
+   "use of NULL in arithmetic operation">,
+   InGroup<NullArithmetic>;
+ def warn_null_in_comparison_operation : Warning<
+   "comparison between NULL and non-pointer "
+   "%select{(%1 and NULL)|(NULL and %1)}0">,
+   InGroup<NullArithmetic>;
+ def err_shift_rhs_only_vector : Error<
+   "requested shift is a vector of type %0 but the first operand is not a "
+   "vector (%1)">;
+ 
+ def warn_logical_not_on_lhs_of_check : Warning<
+   "logical not is only applied to the left hand side of this "
+   "%select{comparison|bitwise operator}0">,
+   InGroup<LogicalNotParentheses>;
+ def note_logical_not_fix : Note<
+   "add parentheses after the '!' to evaluate the "
+   "%select{comparison|bitwise operator}0 first">;
+ def note_logical_not_silence_with_parens : Note<
+   "add parentheses around left hand side expression to silence this warning">;
+ 
+ def err_invalid_this_use : Error<
+   "invalid use of 'this' outside of a non-static member function">;
+ def err_this_static_member_func : Error<
+   "'this' cannot be%select{| implicitly}0 used in a static member function "
+   "declaration">;
+ def err_invalid_member_use_in_static_method : Error<
+   "invalid use of member %0 in static member function">;
+ def err_invalid_qualified_function_type : Error<
+   "%select{non-member function|static member function|deduction guide}0 "
+   "%select{of type %2 |}1cannot have '%3' qualifier">;
+ def err_compound_qualified_function_type : Error<
+   "%select{block pointer|pointer|reference}0 to function type %select{%2 |}1"
+   "cannot have '%3' qualifier">;
+ def err_qualified_function_typeid : Error<
+   "type operand %0 of 'typeid' cannot have '%1' qualifier">;
+ 
+ def err_ref_qualifier_overload : Error<
+   "cannot overload a member function %select{without a ref-qualifier|with "
+   "ref-qualifier '&'|with ref-qualifier '&&'}0 with a member function %select{"
+   "without a ref-qualifier|with ref-qualifier '&'|with ref-qualifier '&&'}1">;
+ 
+ def err_invalid_non_static_member_use : Error<
+   "invalid use of non-static data member %0">;
+ def err_nested_non_static_member_use : Error<
+   "%select{call to non-static member function|use of non-static data member}0 "
+   "%2 of %1 from nested type %3">;
+ def warn_cxx98_compat_non_static_member_use : Warning<
+   "use of non-static data member %0 in an unevaluated context is "
+   "incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
+ def err_invalid_incomplete_type_use : Error<
+   "invalid use of incomplete type %0">;
+ def err_builtin_func_cast_more_than_one_arg : Error<
+   "function-style cast to a builtin type can only take one argument">;
+ def err_value_init_for_array_type : Error<
+   "array types cannot be value-initialized">;
+ def err_init_for_function_type : Error<
+   "cannot create object of function type %0">;
+ def warn_format_nonliteral_noargs : Warning<
+   "format string is not a string literal (potentially insecure)">,
+   InGroup<FormatSecurity>;
+ def warn_format_nonliteral : Warning<
+   "format string is not a string literal">,
+   InGroup<FormatNonLiteral>, DefaultIgnore;
+ 
+ def err_unexpected_interface : Error<
+   "unexpected interface name %0: expected expression">;
+ def err_ref_non_value : Error<"%0 does not refer to a value">;
+ def err_ref_vm_type : Error<
+   "cannot refer to declaration with a variably modified type inside block">;
+ def err_ref_flexarray_type : Error<
+   "cannot refer to declaration of structure variable with flexible array member "
+   "inside block">;
+ def err_ref_array_type : Error<
+   "cannot refer to declaration with an array type inside block">;
+ def err_property_not_found : Error<
+   "property %0 not found on object of type %1">;
+ def err_invalid_property_name : Error<
+   "%0 is not a valid property name (accessing an object of type %1)">;
+ def err_getter_not_found : Error<
+   "no getter method for read from property">;
+ def err_objc_subscript_method_not_found : Error<
+   "expected method to %select{read|write}1 %select{dictionary|array}2 element not "
+   "found on object of type %0">;
+ def err_objc_subscript_index_type : Error<
+   "method index parameter type %0 is not integral type">;
+ def err_objc_subscript_key_type : Error<
+   "method key parameter type %0 is not object type">;
+ def err_objc_subscript_dic_object_type : Error<
+   "method object parameter type %0 is not object type">;
+ def err_objc_subscript_object_type : Error<
+   "cannot assign to this %select{dictionary|array}1 because assigning method's "
+   "2nd parameter of type %0 is not an Objective-C pointer type">;
+ def err_objc_subscript_base_type : Error<
+   "%select{dictionary|array}1 subscript base type %0 is not an Objective-C object">;
+ def err_objc_multiple_subscript_type_conversion : Error<
+   "indexing expression is invalid because subscript type %0 has "
+   "multiple type conversion functions">;
+ def err_objc_subscript_type_conversion : Error<
+   "indexing expression is invalid because subscript type %0 is not an integral"
+   " or Objective-C pointer type">;
+ def err_objc_subscript_pointer : Error<
+   "indexing expression is invalid because subscript type %0 is not an"
+   " Objective-C pointer">;
+ def err_objc_indexing_method_result_type : Error<
+   "method for accessing %select{dictionary|array}1 element must have Objective-C"
+   " object return type instead of %0">;
+ def err_objc_index_incomplete_class_type : Error<
+   "Objective-C index expression has incomplete class type %0">;
+ def err_illegal_container_subscripting_op : Error<
+   "illegal operation on Objective-C container subscripting">;
+ def err_property_not_found_forward_class : Error<
+   "property %0 cannot be found in forward class object %1">;
+ def err_property_not_as_forward_class : Error<
+   "property %0 refers to an incomplete Objective-C class %1 "
+   "(with no @interface available)">;
+ def note_forward_class : Note<
+   "forward declaration of class here">;
+ def err_duplicate_property : Error<
+   "property has a previous declaration">;
+ def ext_gnu_void_ptr : Extension<
+   "arithmetic on%select{ a|}0 pointer%select{|s}0 to void is a GNU extension">,
+   InGroup<PointerArith>;
+ def ext_gnu_ptr_func_arith : Extension<
+   "arithmetic on%select{ a|}0 pointer%select{|s}0 to%select{ the|}2 function "
+   "type%select{|s}2 %1%select{| and %3}2 is a GNU extension">,
+   InGroup<PointerArith>;
+ def err_readonly_message_assignment : Error<
+   "assigning to 'readonly' return result of an Objective-C message not allowed">;
+ def ext_integer_increment_complex : Extension<
+   "ISO C does not support '++'/'--' on complex integer type %0">;
+ def ext_integer_complement_complex : Extension<
+   "ISO C does not support '~' for complex conjugation of %0">;
+ def err_nosetter_property_assignment : Error<
+   "%select{assignment to readonly property|"
+   "no setter method %1 for assignment to property}0">;
+ def err_nosetter_property_incdec : Error<
+   "%select{%select{increment|decrement}1 of readonly property|"
+   "no setter method %2 for %select{increment|decrement}1 of property}0">;
+ def err_nogetter_property_compound_assignment : Error<
+   "a getter method is needed to perform a compound assignment on a property">;
+ def err_nogetter_property_incdec : Error<
+   "no getter method %1 for %select{increment|decrement}0 of property">;
+ def err_no_subobject_property_setting : Error<
+   "expression is not assignable">;
+ def err_qualified_objc_access : Error<
+   "%select{property|instance variable}0 access cannot be qualified with '%1'">;
+ 
+ def ext_freestanding_complex : Extension<
+   "complex numbers are an extension in a freestanding C99 implementation">;
+ 
+ // FIXME: Remove when we support imaginary.
+ def err_imaginary_not_supported : Error<"imaginary types are not supported">;
+ 
+ // Obj-c expressions
+ def warn_root_inst_method_not_found : Warning<
+   "instance method %0 is being used on 'Class' which is not in the root class">,
+   InGroup<MethodAccess>;
+ def warn_class_method_not_found : Warning<
+   "class method %objcclass0 not found (return type defaults to 'id')">,
+   InGroup<MethodAccess>;
+ def warn_instance_method_on_class_found : Warning<
+   "instance method %0 found instead of class method %1">,
+   InGroup<MethodAccess>;
+ def warn_inst_method_not_found : Warning<
+   "instance method %objcinstance0 not found (return type defaults to 'id')">,
+   InGroup<MethodAccess>;
+ def warn_instance_method_not_found_with_typo : Warning<
+   "instance method %objcinstance0 not found (return type defaults to 'id')"
+   "; did you mean %objcinstance2?">, InGroup<MethodAccess>;
+ def warn_class_method_not_found_with_typo : Warning<
+   "class method %objcclass0 not found (return type defaults to 'id')"
+   "; did you mean %objcclass2?">, InGroup<MethodAccess>;
+ def err_method_not_found_with_typo : Error<
+   "%select{instance|class}1 method %0 not found "
+   "; did you mean %2?">;
+ def err_no_super_class_message : Error<
+   "no @interface declaration found in class messaging of %0">;
+ def err_root_class_cannot_use_super : Error<
+   "%0 cannot use 'super' because it is a root class">;
+ def err_invalid_receiver_to_message_super : Error<
+   "'super' is only valid in a method body">;
+ def err_invalid_receiver_class_message : Error<
+   "receiver type %0 is not an Objective-C class">;
+ def err_missing_open_square_message_send : Error<
+   "missing '[' at start of message send expression">;
+ def warn_bad_receiver_type : Warning<
+   "receiver type %0 is not 'id' or interface pointer, consider "
+   "casting it to 'id'">,InGroup<ObjCReceiver>;
+ def err_bad_receiver_type : Error<"bad receiver type %0">;
+ def err_incomplete_receiver_type : Error<"incomplete receiver type %0">;
+ def err_unknown_receiver_suggest : Error<
+   "unknown receiver %0; did you mean %1?">;
+ def err_objc_throw_expects_object : Error<
+   "@throw requires an Objective-C object type (%0 invalid)">;
+ def err_objc_synchronized_expects_object : Error<
+   "@synchronized requires an Objective-C object type (%0 invalid)">;
+ def err_rethrow_used_outside_catch : Error<
+   "@throw (rethrow) used outside of a @catch block">;
+ def err_attribute_multiple_objc_gc : Error<
+   "multiple garbage collection attributes specified for type">;
+ def err_catch_param_not_objc_type : Error<
+   "@catch parameter is not a pointer to an interface type">;
+ def err_illegal_qualifiers_on_catch_parm : Error<
+   "illegal qualifiers on @catch parameter">;
+ def err_storage_spec_on_catch_parm : Error<
+   "@catch parameter cannot have storage specifier '%0'">;
+ def warn_register_objc_catch_parm : Warning<
+   "'register' storage specifier on @catch parameter will be ignored">;
+ def err_qualified_objc_catch_parm : Error<
+   "@catch parameter declarator cannot be qualified">;
+ def warn_objc_pointer_cxx_catch_fragile : Warning<
+   "cannot catch an exception thrown with @throw in C++ in the non-unified "
+   "exception model">, InGroup<ObjCNonUnifiedException>;
+ def err_objc_object_catch : Error<
+   "cannot catch an Objective-C object by value">;
+ def err_incomplete_type_objc_at_encode : Error<
+   "'@encode' of incomplete type %0">;
+ def warn_objc_circular_container : Warning<
+   "adding %0 to %1 might cause circular dependency in container">,
+   InGroup<DiagGroup<"objc-circular-container">>;
+ def note_objc_circular_container_declared_here : Note<"%0 declared here">;
+ def warn_objc_unsafe_perform_selector : Warning<
+   "%0 is incompatible with selectors that return a "
+   "%select{struct|union|vector}1 type">,
+   InGroup<DiagGroup<"objc-unsafe-perform-selector">>;
+ def note_objc_unsafe_perform_selector_method_declared_here :  Note<
+   "method %0 that returns %1 declared here">;
+ def err_attribute_arm_builtin_alias : Error<
+   "'__clang_arm_builtin_alias' attribute can only be applied to an ARM builtin">;
+ def err_attribute_arm_mve_polymorphism : Error<
+   "'__clang_arm_mve_strict_polymorphism' attribute can only be applied to an MVE/NEON vector type">;
+ 
+ def warn_setter_getter_impl_required : Warning<
+   "property %0 requires method %1 to be defined - "
+   "use @synthesize, @dynamic or provide a method implementation "
+   "in this class implementation">,
+   InGroup<ObjCPropertyImpl>;
+ def warn_setter_getter_impl_required_in_category : Warning<
+   "property %0 requires method %1 to be defined - "
+   "use @dynamic or provide a method implementation in this category">,
+   InGroup<ObjCPropertyImpl>;
+ def note_parameter_named_here : Note<
+   "passing argument to parameter %0 here">;
+ def note_parameter_here : Note<
+   "passing argument to parameter here">;
+ def note_method_return_type_change : Note<
+   "compiler has implicitly changed method %0 return type">;
+ 
+ def warn_impl_required_for_class_property : Warning<
+   "class property %0 requires method %1 to be defined - "
+   "use @dynamic or provide a method implementation "
+   "in this class implementation">,
+   InGroup<ObjCPropertyImpl>;
+ def warn_impl_required_in_category_for_class_property : Warning<
+   "class property %0 requires method %1 to be defined - "
+   "use @dynamic or provide a method implementation in this category">,
+   InGroup<ObjCPropertyImpl>;
+ 
+ // C++ casts
+ // These messages adhere to the TryCast pattern: %0 is an int specifying the
+ // cast type, %1 is the source type, %2 is the destination type.
+ def err_bad_reinterpret_cast_overload : Error<
+   "reinterpret_cast cannot resolve overloaded function %0 to type %1">;
+ 
+ def warn_reinterpret_different_from_static : Warning<
+   "'reinterpret_cast' %select{from|to}3 class %0 %select{to|from}3 its "
+   "%select{virtual base|base at non-zero offset}2 %1 behaves differently from "
+   "'static_cast'">, InGroup<ReinterpretBaseClass>;
+ def note_reinterpret_updowncast_use_static: Note<
+   "use 'static_cast' to adjust the pointer correctly while "
+   "%select{upcasting|downcasting}0">;
+ 
+ def err_bad_static_cast_overload : Error<
+   "address of overloaded function %0 cannot be static_cast to type %1">;
+ 
+ def err_bad_cstyle_cast_overload : Error<
+   "address of overloaded function %0 cannot be cast to type %1">;
+ 
+ 
+ def err_bad_cxx_cast_generic : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|"
+   "C-style cast|functional-style cast|addrspace_cast}0 from %1 to %2 is not allowed">;
+ def err_bad_cxx_cast_unrelated_class : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
+   "functional-style cast|}0 from %1 to %2, which are not related by "
+   "inheritance, is not allowed">;
+ def note_type_incomplete : Note<"%0 is incomplete">;
+ def err_bad_cxx_cast_rvalue : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
+   "functional-style cast|addrspace_cast}0 from rvalue to reference type %2">;
+ def err_bad_cxx_cast_bitfield : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
+   "functional-style cast|}0 from bit-field lvalue to reference type %2">;
+ def err_bad_cxx_cast_qualifiers_away : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
+   "functional-style cast|}0 from %1 to %2 casts away qualifiers">;
+ def err_bad_cxx_cast_addr_space_mismatch : Error<
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|"
+   "C-style cast|functional-style cast|addrspace_cast}0 from %1 to %2 converts between mismatching address"
+   " spaces">;
+ def ext_bad_cxx_cast_qualifiers_away_incoherent : ExtWarn<
+   "ISO C++ does not allow "
+   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
+   "functional-style cast|}0 from %1 to %2 because it casts away qualifiers, "
+   "even though the source and destination types are unrelated">,
+   SFINAEFailure, InGroup<DiagGroup<"cast-qual-unrelated">>;
+ def err_bad_const_cast_dest : Error<
+   "%select{const_cast||||C-style cast|functional-style cast|}0 to %2, "
+   "which is not a reference, pointer-to-object, or pointer-to-data-member">;
+ def ext_cast_fn_obj : Extension<
+   "cast between pointer-to-function and pointer-to-object is an extension">;
+ def ext_ms_cast_fn_obj : ExtWarn<
+   "static_cast between pointer-to-function and pointer-to-object is a "
+   "Microsoft extension">, InGroup<MicrosoftCast>;
+ def warn_cxx98_compat_cast_fn_obj : Warning<
+   "cast between pointer-to-function and pointer-to-object is incompatible with C++98">,
+   InGroup<CXX98CompatPedantic>, DefaultIgnore;
+ def err_bad_reinterpret_cast_small_int : Error<
+   "cast from pointer to smaller type %2 loses information">;
+ def err_bad_cxx_cast_vector_to_scalar_different_size : Error<
+   "%select{||reinterpret_cast||C-style cast||}0 from vector %1 "
+   "to scalar %2 of different size">;
+ def err_bad_cxx_cast_scalar_to_vector_different_size : Error<
+   "%select{||reinterpret_cast||C-style cast||}0 from scalar %1 "
+   "to vector %2 of different size">;
+ def err_bad_cxx_cast_vector_to_vector_different_size : Error<
+   "%select{||reinterpret_cast||C-style cast||}0 from vector %1 "
+   "to vector %2 of different size">;
+ def warn_bad_cxx_cast_nested_pointer_addr_space : Warning<
+   "%select{reinterpret_cast|C-style cast}0 from %1 to %2 "
+   "changes address space of nested pointers">,
+   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
+ def err_bad_lvalue_to_rvalue_cast : Error<
+   "cannot cast from lvalue of type %1 to rvalue reference type %2; types are "
+   "not compatible">;
+ def err_bad_rvalue_to_rvalue_cast : Error<
+   "cannot cast from rvalue of type %1 to rvalue reference type %2; types are "
+   "not compatible">;
+ def err_bad_static_cast_pointer_nonpointer : Error<
+   "cannot cast from type %1 to pointer type %2">;
+ def err_bad_static_cast_member_pointer_nonmp : Error<
+   "cannot cast from type %1 to member pointer type %2">;
+ def err_bad_cxx_cast_member_pointer_size : Error<
+   "cannot %select{||reinterpret_cast||C-style cast||}0 from member pointer "
+   "type %1 to member pointer type %2 of different size">;
+ def err_bad_reinterpret_cast_reference : Error<
+   "reinterpret_cast of a %0 to %1 needs its address, which is not allowed">;
+ def warn_undefined_reinterpret_cast : Warning<
+   "reinterpret_cast from %0 to %1 has undefined behavior">,
+   InGroup<UndefinedReinterpretCast>, DefaultIgnore;
+ 
+ // These messages don't adhere to the pattern.
+ // FIXME: Display the path somehow better.
+ def err_ambiguous_base_to_derived_cast : Error<
+   "ambiguous cast from base %0 to derived %1:%2">;
+ def err_static_downcast_via_virtual : Error<
+   "cannot cast %0 to %1 via virtual base %2">;
+ def err_downcast_from_inaccessible_base : Error<
+   "cannot cast %select{private|protected}2 base class %1 to %0">;
+ def err_upcast_to_inaccessible_base : Error<
+   "cannot cast %0 to its %select{private|protected}2 base class %1">;
+ def err_bad_dynamic_cast_not_ref_or_ptr : Error<
+   "invalid target type %0 for dynamic_cast; target type must be a reference or pointer type to a defined class">;
+ def err_bad_dynamic_cast_not_class : Error<"%0 is not a class type">;
+ def err_bad_cast_incomplete : Error<"%0 is an incomplete type">;
+ def err_bad_dynamic_cast_not_ptr : Error<"cannot use dynamic_cast to convert from %0 to %1">;
+ def err_bad_dynamic_cast_not_polymorphic : Error<"%0 is not polymorphic">;
+ 
+ // Other C++ expressions
+ def err_need_header_before_typeid : Error<
+   "you need to include <typeinfo> before using the 'typeid' operator">;
+ def err_need_header_before_ms_uuidof : Error<
+   "you need to include <guiddef.h> before using the '__uuidof' operator">;
+ def err_need_header_before_placement_new : Error<
+   "no matching %0 function for non-allocating placement new expression; "
+   "include <new>">;
+ def err_ms___leave_not_in___try : Error<
+   "'__leave' statement not in __try block">;
+ def err_uuidof_without_guid : Error<
+   "cannot call operator __uuidof on a type with no GUID">;
+ def err_uuidof_with_multiple_guids : Error<
+   "cannot call operator __uuidof on a type with multiple GUIDs">;
+ def err_incomplete_typeid : Error<"'typeid' of incomplete type %0">;
+ def err_variably_modified_typeid : Error<"'typeid' of variably modified type %0">;
+ def err_static_illegal_in_new : Error<
+   "the 'static' modifier for the array size is not legal in new expressions">;
+ def err_array_new_needs_size : Error<
+   "array size must be specified in new expression with no initializer">;
+ def err_bad_new_type : Error<
+   "cannot allocate %select{function|reference}1 type %0 with new">;
+ def err_new_incomplete_or_sizeless_type : Error<
+   "allocation of %select{incomplete|sizeless}0 type %1">;
+ def err_new_array_nonconst : Error<
+   "only the first dimension of an allocated array may have dynamic size">;
+ def err_new_array_size_unknown_from_init : Error<
+   "cannot determine allocated array size from initializer">;
+ def err_new_array_init_args : Error<
+   "array 'new' cannot have initialization arguments">;
+ def ext_new_paren_array_nonconst : ExtWarn<
+   "when type is in parentheses, array cannot have dynamic size">;
+ def err_placement_new_non_placement_delete : Error<
+   "'new' expression with placement arguments refers to non-placement "
+   "'operator delete'">;
+ def err_array_size_not_integral : Error<
+   "array size expression must have integral or %select{|unscoped }0"
+   "enumeration type, not %1">;
+ def err_array_size_incomplete_type : Error<
+   "array size expression has incomplete class type %0">;
+ def err_array_size_explicit_conversion : Error<
+   "array size expression of type %0 requires explicit conversion to type %1">;
+ def note_array_size_conversion : Note<
+   "conversion to %select{integral|enumeration}0 type %1 declared here">;
+ def err_array_size_ambiguous_conversion : Error<
+   "ambiguous conversion of array size expression of type %0 to an integral or "
+   "enumeration type">;
+ def ext_array_size_conversion : Extension<
+   "implicit conversion from array size expression of type %0 to "
+   "%select{integral|enumeration}1 type %2 is a C++11 extension">,
+   InGroup<CXX11>;
+ def warn_cxx98_compat_array_size_conversion : Warning<
+   "implicit conversion from array size expression of type %0 to "
+   "%select{integral|enumeration}1 type %2 is incompatible with C++98">,
+   InGroup<CXX98CompatPedantic>, DefaultIgnore;
+ def err_address_space_qualified_new : Error<
+   "'new' cannot allocate objects of type %0 in address space '%1'">;
+ def err_address_space_qualified_delete : Error<
+   "'delete' cannot delete objects of type %0 in address space '%1'">;
+ 
+ def err_default_init_const : Error<
+   "default initialization of an object of const type %0"
+   "%select{| without a user-provided default constructor}1">;
+ def ext_default_init_const : ExtWarn<
+   "default initialization of an object of const type %0"
+   "%select{| without a user-provided default constructor}1 "
+   "is a Microsoft extension">,
+   InGroup<MicrosoftConstInit>;
+ def err_delete_operand : Error<"cannot delete expression of type %0">;
+ def ext_delete_void_ptr_operand : ExtWarn<
+   "cannot delete expression with pointer-to-'void' type %0">,
+   InGroup<DeleteIncomplete>;
+ def err_ambiguous_delete_operand : Error<
+   "ambiguous conversion of delete expression of type %0 to a pointer">;
+ def warn_delete_incomplete : Warning<
+   "deleting pointer to incomplete type %0 may cause undefined behavior">,
+   InGroup<DeleteIncomplete>;
+ def err_delete_incomplete_class_type : Error<
+   "deleting incomplete class type %0; no conversions to pointer type">;
+ def err_delete_explicit_conversion : Error<
+   "converting delete expression from type %0 to type %1 invokes an explicit "
+   "conversion function">;
+ def note_delete_conversion : Note<"conversion to pointer type %0">;
+ def warn_delete_array_type : Warning<
+   "'delete' applied to a pointer-to-array type %0 treated as 'delete[]'">;
+ def warn_mismatched_delete_new : Warning<
+   "'delete%select{|[]}0' applied to a pointer that was allocated with "
+   "'new%select{[]|}0'; did you mean 'delete%select{[]|}0'?">,
+   InGroup<DiagGroup<"mismatched-new-delete">>;
+ def note_allocated_here : Note<"allocated with 'new%select{[]|}0' here">;
+ def err_no_suitable_delete_member_function_found : Error<
+   "no suitable member %0 in %1">;
+ def err_ambiguous_suitable_delete_member_function_found : Error<
+   "multiple suitable %0 functions in %1">;
+ def warn_ambiguous_suitable_delete_function_found : Warning<
+   "multiple suitable %0 functions for %1; no 'operator delete' function "
+   "will be invoked if initialization throws an exception">,
+   InGroup<DiagGroup<"ambiguous-delete">>;
+ def note_member_declared_here : Note<
+   "member %0 declared here">;
+ def note_member_first_declared_here : Note<
+   "member %0 first declared here">;
++def warn_bitwise_instead_of_logical : Warning<
++  "use of bitwise '%0' with boolean operands">,
++  InGroup<BitwiseInsteadOfLogical>, DefaultIgnore;
+ def warn_bitwise_negation_bool : Warning<
+   "bitwise negation of a boolean expression%select{;| always evaluates to 'true';}0 "
+   "did you mean logical negation?">,
+   InGroup<BoolOperation>, DefaultIgnore;
+ def err_decrement_bool : Error<"cannot decrement expression of type bool">;
+ def warn_increment_bool : Warning<
+   "incrementing expression of type bool is deprecated and "
+   "incompatible with C++17">, InGroup<DeprecatedIncrementBool>;
+ def ext_increment_bool : ExtWarn<
+   "ISO C++17 does not allow incrementing expression of type bool">,
+   DefaultError, InGroup<IncrementBool>;
+ def err_increment_decrement_enum : Error<
+   "cannot %select{decrement|increment}0 expression of enum type %1">;
+ 
+ def warn_deprecated_increment_decrement_volatile : Warning<
+   "%select{decrement|increment}0 of object of volatile-qualified type %1 "
+   "is deprecated">, InGroup<DeprecatedVolatile>;
+ def warn_deprecated_simple_assign_volatile : Warning<
+   "use of result of assignment to object of volatile-qualified type %0 "
+   "is deprecated">, InGroup<DeprecatedVolatile>;
+ def warn_deprecated_compound_assign_volatile : Warning<
+   "compound assignment to object of volatile-qualified type %0 is deprecated">,
+   InGroup<DeprecatedVolatile>;
+ def warn_deprecated_volatile_return : Warning<
+   "volatile-qualified return type %0 is deprecated">,
+   InGroup<DeprecatedVolatile>;
+ def warn_deprecated_volatile_param : Warning<
+   "volatile-qualified parameter type %0 is deprecated">,
+   InGroup<DeprecatedVolatile>;
+ def warn_deprecated_volatile_structured_binding : Warning<
+   "volatile qualifier in structured binding declaration is deprecated">,
+   InGroup<DeprecatedVolatile>;
+ 
+ def warn_deprecated_altivec_src_compat : Warning<
+   "Current handling of vector bool and vector pixel types in this context are "
+   "deprecated. The default behaviour will soon change to that implied by the "
+   "'-altivec-compat=xl' option">,
+   InGroup<DiagGroup<"deprecated-altivec-src-compat">>;
+ 
+ def err_catch_incomplete_ptr : Error<
+   "cannot catch pointer to incomplete type %0">;
+ def err_catch_incomplete_ref : Error<
+   "cannot catch reference to incomplete type %0">;
+ def err_catch_incomplete : Error<"cannot catch incomplete type %0">;
+ def err_catch_sizeless : Error<
+   "cannot catch %select{|reference to }0sizeless type %1">;
+ def err_catch_rvalue_ref : Error<"cannot catch exceptions by rvalue reference">;
+ def err_catch_variably_modified : Error<
+   "cannot catch variably modified type %0">;
+ def err_qualified_catch_declarator : Error<
+   "exception declarator cannot be qualified">;
+ def err_early_catch_all : Error<"catch-all handler must come last">;
+ def err_bad_memptr_rhs : Error<
+   "right hand operand to %0 has non-pointer-to-member type %1">;
+ def err_bad_memptr_lhs : Error<
+   "left hand operand to %0 must be a %select{|pointer to }1class "
+   "compatible with the right hand operand, but is %2">;
+ def err_memptr_incomplete : Error<
+   "member pointer has incomplete base type %0">;
+ def warn_exception_caught_by_earlier_handler : Warning<
+   "exception of type %0 will be caught by earlier handler">,
+   InGroup<Exceptions>;
+ def note_previous_exception_handler : Note<"for type %0">;
+ def err_exceptions_disabled : Error<
+   "cannot use '%0' with exceptions disabled">;
+ def err_objc_exceptions_disabled : Error<
+   "cannot use '%0' with Objective-C exceptions disabled">;
+ def warn_throw_in_noexcept_func : Warning<
+   "%0 has a non-throwing exception specification but can still throw">,
+   InGroup<Exceptions>;
+ def note_throw_in_dtor : Note<
+   "%select{destructor|deallocator}0 has a %select{non-throwing|implicit "
+   "non-throwing}1 exception specification">;
+ def note_throw_in_function : Note<"function declared non-throwing here">;
+ def err_seh_try_outside_functions : Error<
+   "cannot use SEH '__try' in blocks, captured regions, or Obj-C method decls">;
+ def err_mixing_cxx_try_seh_try : Error<
+   "cannot use C++ 'try' in the same function as SEH '__try'">;
+ def err_seh_try_unsupported : Error<
+   "SEH '__try' is not supported on this target">;
+ def note_conflicting_try_here : Note<
+   "conflicting %0 here">;
+ def warn_jump_out_of_seh_finally : Warning<
+   "jump out of __finally block has undefined behavior">,
+   InGroup<DiagGroup<"jump-seh-finally">>;
+ def warn_non_virtual_dtor : Warning<
+   "%0 has virtual functions but non-virtual destructor">,
+   InGroup<NonVirtualDtor>, DefaultIgnore;
+ def warn_delete_non_virtual_dtor : Warning<
+   "%select{delete|destructor}0 called on non-final %1 that has "
+   "virtual functions but non-virtual destructor">,
+   InGroup<DeleteNonAbstractNonVirtualDtor>, DefaultIgnore, ShowInSystemHeader;
+ def note_delete_non_virtual : Note<
+   "qualify call to silence this warning">;
+ def warn_delete_abstract_non_virtual_dtor : Warning<
+   "%select{delete|destructor}0 called on %1 that is abstract but has "
+   "non-virtual destructor">, InGroup<DeleteAbstractNonVirtualDtor>, ShowInSystemHeader;
+ def warn_overloaded_virtual : Warning<
+   "%q0 hides overloaded virtual %select{function|functions}1">,
+   InGroup<OverloadedVirtual>, DefaultIgnore;
+ def note_hidden_overloaded_virtual_declared_here : Note<
+   "hidden overloaded virtual function %q0 declared here"
+   "%select{|: different classes%diff{ ($ vs $)|}2,3"
+   "|: different number of parameters (%2 vs %3)"
+   "|: type mismatch at %ordinal2 parameter%diff{ ($ vs $)|}3,4"
+   "|: different return type%diff{ ($ vs $)|}2,3"
+   "|: different qualifiers (%2 vs %3)"
+   "|: different exception specifications}1">;
+ def warn_using_directive_in_header : Warning<
+   "using namespace directive in global context in header">,
+   InGroup<HeaderHygiene>, DefaultIgnore;
+ def warn_overaligned_type : Warning<
+   "type %0 requires %1 bytes of alignment and the default allocator only "
+   "guarantees %2 bytes">,
+   InGroup<OveralignedType>, DefaultIgnore;
+ def err_aligned_allocation_unavailable : Error<
+   "aligned %select{allocation|deallocation}0 function of type '%1' is "
+   "%select{only|not}4 available on %2%select{ %3 or newer|}4">;
+ def note_silence_aligned_allocation_unavailable : Note<
+   "if you supply your own aligned allocation functions, use "
+   "-faligned-allocation to silence this diagnostic">;
+ 
+ def err_conditional_void_nonvoid : Error<
+   "%select{left|right}1 operand to ? is void, but %select{right|left}1 operand "
+   "is of type %0">;
+ def err_conditional_ambiguous : Error<
+   "conditional expression is ambiguous; "
+   "%diff{$ can be converted to $ and vice versa|"
+   "types can be convert to each other}0,1">;
+ def err_conditional_ambiguous_ovl : Error<
+   "conditional expression is ambiguous; %diff{$ and $|types}0,1 "
+   "can be converted to several common types">;
+ def err_conditional_vector_size : Error<
+   "vector condition type %0 and result type %1 do not have the same number "
+   "of elements">;
+ def err_conditional_vector_element_size : Error<
+   "vector condition type %0 and result type %1 do not have elements of the "
+   "same size">;
+ def err_conditional_vector_has_void : Error<
+   "GNU vector conditional operand cannot be %select{void|a throw expression}0">;
+ def err_conditional_vector_operand_type
+     : Error<"enumeration type %0 is not allowed in a vector conditional">;
+ def err_conditional_vector_cond_result_mismatch
+     : Error<"cannot mix vectors and extended vectors in a vector conditional">;
+ def err_conditional_vector_mismatched
+     : Error<"vector operands to the vector conditional must be the same type "
+             "%diff{($ and $)|}0,1}">;
+ 
+ def err_throw_incomplete : Error<
+   "cannot throw object of incomplete type %0">;
+ def err_throw_incomplete_ptr : Error<
+   "cannot throw pointer to object of incomplete type %0">;
+ def err_throw_sizeless : Error<
+   "cannot throw object of sizeless type %0">;
+ def warn_throw_underaligned_obj : Warning<
+   "underaligned exception object thrown">,
+   InGroup<UnderalignedExceptionObject>;
+ def note_throw_underaligned_obj : Note<
+   "required alignment of type %0 (%1 bytes) is larger than the supported "
+   "alignment of C++ exception objects on this target (%2 bytes)">;
+ def err_return_in_constructor_handler : Error<
+   "return in the catch of a function try block of a constructor is illegal">;
+ def warn_cdtor_function_try_handler_mem_expr : Warning<
+   "cannot refer to a non-static member from the handler of a "
+   "%select{constructor|destructor}0 function try block">, InGroup<Exceptions>;
+ 
+ let CategoryName = "Lambda Issue" in {
+   def err_capture_more_than_once : Error<
+     "%0 can appear only once in a capture list">;
+   def err_reference_capture_with_reference_default : Error<
+     "'&' cannot precede a capture when the capture default is '&'">;
+   def err_copy_capture_with_copy_default : Error<
+     "'&' must precede a capture when the capture default is '='">;
+   def err_capture_does_not_name_variable : Error<
+     "%0 in capture list does not name a variable">;
+   def err_capture_non_automatic_variable : Error<
+     "%0 cannot be captured because it does not have automatic storage "
+     "duration">;
+   def err_this_capture : Error<
+     "'this' cannot be %select{implicitly |}0captured in this context">;
+   def note_lambda_this_capture_fixit : Note<
+     "explicitly capture 'this'">;
+   def err_lambda_capture_anonymous_var : Error<
+     "unnamed variable cannot be implicitly captured in a lambda expression">;
+   def err_lambda_capture_flexarray_type : Error<
+     "variable %0 with flexible array member cannot be captured in "
+     "a lambda expression">;
+   def err_lambda_impcap : Error<
+     "variable %0 cannot be implicitly captured in a lambda with no "
+     "capture-default specified">;
+   def note_lambda_variable_capture_fixit : Note<
+     "capture %0 by %select{value|reference}1">;
+   def note_lambda_default_capture_fixit : Note<
+     "default capture by %select{value|reference}0">;
+   def note_lambda_decl : Note<"lambda expression begins here">;
+   def err_lambda_unevaluated_operand : Error<
+     "lambda expression in an unevaluated operand">;
+   def err_lambda_in_constant_expression : Error<
+     "a lambda expression may not appear inside of a constant expression">;
+   def err_lambda_in_invalid_context : Error<
+     "a lambda expression cannot appear in this context">;
+   def err_lambda_return_init_list : Error<
+     "cannot deduce lambda return type from initializer list">;
+   def err_lambda_capture_default_arg : Error<
+     "lambda expression in default argument cannot capture any entity">;
+   def err_lambda_incomplete_result : Error<
+     "incomplete result type %0 in lambda expression">;
+   def err_noreturn_lambda_has_return_expr : Error<
+     "lambda declared 'noreturn' should not return">;
+   def warn_maybe_falloff_nonvoid_lambda : Warning<
+     "non-void lambda does not return a value in all control paths">,
+     InGroup<ReturnType>;
+   def warn_falloff_nonvoid_lambda : Warning<
+     "non-void lambda does not return a value">,
+     InGroup<ReturnType>;
+   def err_access_lambda_capture : Error<
+     // The ERRORs represent other special members that aren't constructors, in
+     // hopes that someone will bother noticing and reporting if they appear
+     "capture of variable '%0' as type %1 calls %select{private|protected}3 "
+     "%select{default |copy |move |*ERROR* |*ERROR* |*ERROR* |}2constructor">,
+     AccessControl;
+   def note_lambda_to_block_conv : Note<
+     "implicit capture of lambda object due to conversion to block pointer "
+     "here">;
+   def note_var_explicitly_captured_here : Note<"variable %0 is"
+     "%select{| explicitly}1 captured here">;
+ 
+   // C++14 lambda init-captures.
+   def warn_cxx11_compat_init_capture : Warning<
+     "initialized lambda captures are incompatible with C++ standards "
+     "before C++14">, InGroup<CXXPre14Compat>, DefaultIgnore;
+   def ext_init_capture : ExtWarn<
+     "initialized lambda captures are a C++14 extension">, InGroup<CXX14>;
+   def err_init_capture_no_expression : Error<
+     "initializer missing for lambda capture %0">;
+   def err_init_capture_multiple_expressions : Error<
+     "initializer for lambda capture %0 contains multiple expressions">;
+   def err_init_capture_paren_braces : Error<
+     "cannot deduce type for lambda capture %1 from "
+     "%select{parenthesized|nested}0 initializer list">;
+   def err_init_capture_deduction_failure : Error<
+     "cannot deduce type for lambda capture %0 from initializer of type %2">;
+   def err_init_capture_deduction_failure_from_init_list : Error<
+     "cannot deduce type for lambda capture %0 from initializer list">;
+   def warn_cxx17_compat_init_capture_pack : Warning<
+     "initialized lambda capture packs are incompatible with C++ standards "
+     "before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
+   def ext_init_capture_pack : ExtWarn<
+     "initialized lambda pack captures are a C++20 extension">, InGroup<CXX20>;
+ 
+   // C++14 generic lambdas.
+   def warn_cxx11_compat_generic_lambda : Warning<
+     "generic lambdas are incompatible with C++11">,
+     InGroup<CXXPre14Compat>, DefaultIgnore;
+ 
+   // C++17 '*this' captures.
+   def warn_cxx14_compat_star_this_lambda_capture : Warning<
+     "by value capture of '*this' is incompatible with C++ standards before C++17">,
+      InGroup<CXXPre17Compat>, DefaultIgnore;
+   def ext_star_this_lambda_capture_cxx17 : ExtWarn<
+     "capture of '*this' by copy is a C++17 extension">, InGroup<CXX17>;
+ 
+   // C++17 parameter shadows capture
+   def err_parameter_shadow_capture : Error<
+     "a lambda parameter cannot shadow an explicitly captured entity">;
+ 
+   // C++20 [=, this] captures.
+   def warn_cxx17_compat_equals_this_lambda_capture : Warning<
+     "explicit capture of 'this' with a capture default of '=' is incompatible "
+     "with C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
+   def ext_equals_this_lambda_capture_cxx20 : ExtWarn<
+     "explicit capture of 'this' with a capture default of '=' "
+     "is a C++20 extension">, InGroup<CXX20>;
+   def warn_deprecated_this_capture : Warning<
+     "implicit capture of 'this' with a capture default of '=' is deprecated">,
+     InGroup<DeprecatedThisCapture>, DefaultIgnore;
+   def note_deprecated_this_capture : Note<
+     "add an explicit capture of 'this' to capture '*this' by reference">;
+ 
+   // C++20 default constructible / assignable lambdas.
+   def warn_cxx17_compat_lambda_def_ctor_assign : Warning<
+     "%select{default construction|assignment}0 of lambda is incompatible with "
+     "C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
+ }
+ 
+ def err_return_in_captured_stmt : Error<
+   "cannot return from %0">;
+ def err_capture_block_variable : Error<
+   "__block variable %0 cannot be captured in a "
+   "%select{lambda expression|captured statement}1">;
+ 
+ def err_operator_arrow_circular : Error<
+   "circular pointer delegation detected">;
+ def err_operator_arrow_depth_exceeded : Error<
+   "use of 'operator->' on type %0 would invoke a sequence of more than %1 "
+   "'operator->' calls">;
+ def note_operator_arrow_here : Note<
+   "'operator->' declared here produces an object of type %0">;
+ def note_operator_arrows_suppressed : Note<
+   "(skipping %0 'operator->'%s0 in backtrace)">;
+ def note_operator_arrow_depth : Note<
+   "use -foperator-arrow-depth=N to increase 'operator->' limit">;
+ 
+ def err_pseudo_dtor_base_not_scalar : Error<
+   "object expression of non-scalar type %0 cannot be used in a "
+   "pseudo-destructor expression">;
+ def ext_pseudo_dtor_on_void : ExtWarn<
+   "pseudo-destructors on type void are a Microsoft extension">,
+   InGroup<MicrosoftVoidPseudoDtor>;
+ def err_pseudo_dtor_type_mismatch : Error<
+   "the type of object expression "
+   "%diff{($) does not match the type being destroyed ($)|"
+   "does not match the type being destroyed}0,1 "
+   "in pseudo-destructor expression">;
+ def err_pseudo_dtor_call_with_args : Error<
+   "call to pseudo-destructor cannot have any arguments">;
+ def err_dtor_expr_without_call : Error<
+   "reference to %select{destructor|pseudo-destructor}0 must be called"
+   "%select{|; did you mean to call it with no arguments?}1">;
+ def err_pseudo_dtor_destructor_non_type : Error<
+   "%0 does not refer to a type name in pseudo-destructor expression; expected "
+   "the name of type %1">;
+ def err_invalid_use_of_function_type : Error<
+   "a function type is not allowed here">;
+ def err_invalid_use_of_array_type : Error<"an array type is not allowed here">;
+ def err_typecheck_bool_condition : Error<
+   "value of type %0 is not contextually convertible to 'bool'">;
+ def err_typecheck_ambiguous_condition : Error<
+   "conversion %diff{from $ to $|between types}0,1 is ambiguous">;
+ def err_typecheck_nonviable_condition : Error<
+   "no viable conversion%select{%diff{ from $ to $|}1,2|"
+   "%diff{ from returned value of type $ to function return type $|}1,2}0">;
+ def err_typecheck_nonviable_condition_incomplete : Error<
+   "no viable conversion%diff{ from $ to incomplete type $|}0,1">;
+ def err_typecheck_deleted_function : Error<
+   "conversion function %diff{from $ to $|between types}0,1 "
+   "invokes a deleted function">;
+ 
+ def err_expected_class_or_namespace : Error<"%0 is not a class"
+   "%select{ or namespace|, namespace, or enumeration}1">;
+ def err_invalid_declarator_scope : Error<"cannot define or redeclare %0 here "
+   "because namespace %1 does not enclose namespace %2">;
+ def err_invalid_declarator_global_scope : Error<
+   "definition or redeclaration of %0 cannot name the global scope">;
+ def err_invalid_declarator_in_function : Error<
+   "definition or redeclaration of %0 not allowed inside a function">;
+ def err_invalid_declarator_in_block : Error<
+   "definition or redeclaration of %0 not allowed inside a block">;
+ def err_not_tag_in_scope : Error<
+   "no %select{struct|interface|union|class|enum}0 named %1 in %2">;
+ 
+ def err_no_typeid_with_fno_rtti : Error<
+   "use of typeid requires -frtti">;
+ def err_no_dynamic_cast_with_fno_rtti : Error<
+   "use of dynamic_cast requires -frtti">;
+ def warn_no_dynamic_cast_with_rtti_disabled: Warning<
+   "dynamic_cast will not work since RTTI data is disabled by "
+   "%select{-fno-rtti-data|/GR-}0">, InGroup<RTTI>;
+ def warn_no_typeid_with_rtti_disabled: Warning<
+   "typeid will not work since RTTI data is disabled by "
+   "%select{-fno-rtti-data|/GR-}0">, InGroup<RTTI>;
+ 
+ def err_cannot_form_pointer_to_member_of_reference_type : Error<
+   "cannot form a pointer-to-member to member %0 of reference type %1">;
+ def err_incomplete_object_call : Error<
+   "incomplete type in call to object of type %0">;
+ 
+ def warn_condition_is_assignment : Warning<"using the result of an "
+   "assignment as a condition without parentheses">,
+   InGroup<Parentheses>;
+ def warn_free_nonheap_object
+   : Warning<"attempt to call %0 on non-heap %select{object %2|object: block expression|object: lambda-to-function-pointer conversion}1">,
+     InGroup<FreeNonHeapObject>;
+ 
+ // Completely identical except off by default.
+ def warn_condition_is_idiomatic_assignment : Warning<"using the result "
+   "of an assignment as a condition without parentheses">,
+   InGroup<DiagGroup<"idiomatic-parentheses">>, DefaultIgnore;
+ def note_condition_assign_to_comparison : Note<
+   "use '==' to turn this assignment into an equality comparison">;
+ def note_condition_or_assign_to_comparison : Note<
+   "use '!=' to turn this compound assignment into an inequality comparison">;
+ def note_condition_assign_silence : Note<
+   "place parentheses around the assignment to silence this warning">;
+ 
+ def warn_equality_with_extra_parens : Warning<"equality comparison with "
+   "extraneous parentheses">, InGroup<ParenthesesOnEquality>;
+ def note_equality_comparison_to_assign : Note<
+   "use '=' to turn this equality comparison into an assignment">;
+ def note_equality_comparison_silence : Note<
+   "remove extraneous parentheses around the comparison to silence this warning">;
+ 
+ // assignment related diagnostics (also for argument passing, returning, etc).
+ // In most of these diagnostics the %2 is a value from the
+ // Sema::AssignmentAction enumeration
+ def err_typecheck_convert_incompatible : Error<
+   "%select{%diff{assigning to $ from incompatible type $|"
+   "assigning to type from incompatible type}0,1"
+   "|%diff{passing $ to parameter of incompatible type $|"
+   "passing type to parameter of incompatible type}0,1"
+   "|%diff{returning $ from a function with incompatible result type $|"
+   "returning type from a function with incompatible result type}0,1"
+   "|%diff{converting $ to incompatible type $|"
+   "converting type to incompatible type}0,1"
+   "|%diff{initializing $ with an expression of incompatible type $|"
+   "initializing type with an expression of incompatible type}0,1"
+   "|%diff{sending $ to parameter of incompatible type $|"
+   "sending type to parameter of incompatible type}0,1"
+   "|%diff{casting $ to incompatible type $|"
+   "casting type to incompatible type}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3"
+   "%select{|: different classes%diff{ ($ vs $)|}5,6"
+   "|: different number of parameters (%5 vs %6)"
+   "|: type mismatch at %ordinal5 parameter%diff{ ($ vs $)|}6,7"
+   "|: different return type%diff{ ($ vs $)|}5,6"
+   "|: different qualifiers (%5 vs %6)"
+   "|: different exception specifications}4">;
+ def err_typecheck_missing_return_type_incompatible : Error<
+   "%diff{return type $ must match previous return type $|"
+   "return type must match previous return type}0,1 when %select{block "
+   "literal|lambda expression}2 has unspecified explicit return type">;
+ 
+ def note_incomplete_class_and_qualified_id : Note<
+   "conformance of forward class %0 to protocol %1 can not be confirmed">;
+ def warn_incompatible_qualified_id : Warning<
+   "%select{%diff{assigning to $ from incompatible type $|"
+   "assigning to type from incompatible type}0,1"
+   "|%diff{passing $ to parameter of incompatible type $|"
+   "passing type to parameter of incompatible type}0,1"
+   "|%diff{returning $ from a function with incompatible result type $|"
+   "returning type from a function with incompatible result type}0,1"
+   "|%diff{converting $ to incompatible type $|"
+   "converting type to incompatible type}0,1"
+   "|%diff{initializing $ with an expression of incompatible type $|"
+   "initializing type with an expression of incompatible type}0,1"
+   "|%diff{sending $ to parameter of incompatible type $|"
+   "sending type to parameter of incompatible type}0,1"
+   "|%diff{casting $ to incompatible type $|"
+   "casting type to incompatible type}0,1}2">;
+ def err_incompatible_qualified_id : Error<
+   "%select{%diff{assigning to $ from incompatible type $|"
+   "assigning to type from incompatible type}0,1"
+   "|%diff{passing $ to parameter of incompatible type $|"
+   "passing type to parameter of incompatible type}0,1"
+   "|%diff{returning $ from a function with incompatible result type $|"
+   "returning type from a function with incompatible result type}0,1"
+   "|%diff{converting $ to incompatible type $|"
+   "converting type to incompatible type}0,1"
+   "|%diff{initializing $ with an expression of incompatible type $|"
+   "initializing type with an expression of incompatible type}0,1"
+   "|%diff{sending $ to parameter of incompatible type $|"
+   "sending type to parameter of incompatible type}0,1"
+   "|%diff{casting $ to incompatible type $|"
+   "casting type to incompatible type}0,1}2">;
+ def ext_typecheck_convert_pointer_int : ExtWarn<
+   "incompatible pointer to integer conversion "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">,
+   InGroup<IntConversion>;
+ def err_typecheck_convert_pointer_int : Error<
+   "incompatible pointer to integer conversion "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">;
+ def ext_typecheck_convert_int_pointer : ExtWarn<
+   "incompatible integer to pointer conversion "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">,
+   InGroup<IntConversion>, SFINAEFailure;
+ def err_typecheck_convert_int_pointer : Error<
+   "incompatible integer to pointer conversion "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">;
+ def ext_typecheck_convert_pointer_void_func : Extension<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " converts between void pointer and function pointer">;
+ def err_typecheck_convert_pointer_void_func : Error<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " converts between void pointer and function pointer">;
+ def ext_typecheck_convert_incompatible_pointer_sign : ExtWarn<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " converts between pointers to integer types %select{with different sign|"
+   "where one is of the unique plain 'char' type and the other is not}3">,
+   InGroup<DiagGroup<"pointer-sign">>;
+ def err_typecheck_convert_incompatible_pointer_sign :
+   Error<ext_typecheck_convert_incompatible_pointer_sign.Text>;
+ def ext_typecheck_convert_incompatible_pointer : ExtWarn<
+   "incompatible pointer types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">,
+   InGroup<IncompatiblePointerTypes>;
+ def err_typecheck_convert_incompatible_pointer : Error<
+   "incompatible pointer types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">;
+ def ext_typecheck_convert_incompatible_function_pointer : ExtWarn<
+   "incompatible function pointer types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">,
+   InGroup<IncompatibleFunctionPointerTypes>;
+ def err_typecheck_convert_incompatible_function_pointer : Error<
+   "incompatible function pointer types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   "%select{|; dereference with *|"
+   "; take the address with &|"
+   "; remove *|"
+   "; remove &}3">;
+ def ext_typecheck_convert_discards_qualifiers : ExtWarn<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " discards qualifiers">,
+   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
+ def err_typecheck_convert_discards_qualifiers : Error<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " discards qualifiers">;
+ def ext_nested_pointer_qualifier_mismatch : ExtWarn<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " discards qualifiers in nested pointer types">,
+   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
+ def err_nested_pointer_qualifier_mismatch : Error<
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " discards qualifiers in nested pointer types">;
+ def warn_incompatible_vectors : Warning<
+   "incompatible vector types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2">,
+   InGroup<VectorConversion>, DefaultIgnore;
+ def err_incompatible_vectors : Error<
+   "incompatible vector types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2">;
+ def err_int_to_block_pointer : Error<
+   "invalid block pointer conversion "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2">;
+ def err_typecheck_convert_incompatible_block_pointer : Error<
+   "incompatible block pointer types "
+   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2">;
+ def err_typecheck_incompatible_address_space : Error<
+   "%select{%diff{assigning $ to $|assigning to different types}1,0"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " changes address space of pointer">;
+ def err_typecheck_incompatible_nested_address_space : Error<
+   "%select{%diff{assigning $ to $|assigning to different types}1,0"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " changes address space of nested pointer">;
+ def err_typecheck_incompatible_ownership : Error<
+   "%select{%diff{assigning $ to $|assigning to different types}1,0"
+   "|%diff{passing $ to parameter of type $|"
+   "passing to parameter of different type}0,1"
+   "|%diff{returning $ from a function with result type $|"
+   "returning from function with different return type}0,1"
+   "|%diff{converting $ to type $|converting between types}0,1"
+   "|%diff{initializing $ with an expression of type $|"
+   "initializing with expression of different type}0,1"
+   "|%diff{sending $ to parameter of type $|"
+   "sending to parameter of different type}0,1"
+   "|%diff{casting $ to type $|casting between types}0,1}2"
+   " changes retain/release properties of pointer">;
+ def err_typecheck_comparison_of_distinct_blocks : Error<
+   "comparison of distinct block types%diff{ ($ and $)|}0,1">;
+ 
+ def err_typecheck_array_not_modifiable_lvalue : Error<
+   "array type %0 is not assignable">;
+ def err_typecheck_non_object_not_modifiable_lvalue : Error<
+   "non-object type %0 is not assignable">;
+ def err_typecheck_expression_not_modifiable_lvalue : Error<
+   "expression is not assignable">;
+ def err_typecheck_incomplete_type_not_modifiable_lvalue : Error<
+   "incomplete type %0 is not assignable">;
+ def err_typecheck_lvalue_casts_not_supported : Error<
+   "assignment to cast is illegal, lvalue casts are not supported">;
+ 
+ def err_typecheck_duplicate_vector_components_not_mlvalue : Error<
+   "vector is not assignable (contains duplicate components)">;
+ def err_block_decl_ref_not_modifiable_lvalue : Error<
+   "variable is not assignable (missing __block type specifier)">;
+ def err_lambda_decl_ref_not_modifiable_lvalue : Error<
+   "cannot assign to a variable captured by copy in a non-mutable lambda">;
+ def err_typecheck_call_not_function : Error<
+   "called object type %0 is not a function or function pointer">;
+ def err_call_incomplete_return : Error<
+   "calling function with incomplete return type %0">;
+ def err_call_function_incomplete_return : Error<
+   "calling %0 with incomplete return type %1">;
+ def err_call_incomplete_argument : Error<
+   "argument type %0 is incomplete">;
+ def err_typecheck_call_too_few_args : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected %1, have %2">;
+ def err_typecheck_call_too_few_args_one : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "single argument %1 was not specified">;
+ def err_typecheck_call_too_few_args_at_least : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected at least %1, have %2">;
+ def err_typecheck_call_too_few_args_at_least_one : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "at least argument %1 must be specified">;
+ def err_typecheck_call_too_few_args_suggest : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected %1, have %2; did you mean %3?">;
+ def err_typecheck_call_too_few_args_at_least_suggest : Error<
+   "too few %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected at least %1, have %2; did you mean %3?">;
+ def err_typecheck_call_too_many_args : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected %1, have %2">;
+ def err_typecheck_call_too_many_args_one : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected single argument %1, have %2 arguments">;
+ def err_typecheck_call_too_many_args_at_most : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected at most %1, have %2">;
+ def err_typecheck_call_too_many_args_at_most_one : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected at most single argument %1, have %2 arguments">;
+ def err_typecheck_call_too_many_args_suggest : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected %1, have %2; did you mean %3?">;
+ def err_typecheck_call_too_many_args_at_most_suggest : Error<
+   "too many %select{|||execution configuration }0arguments to "
+   "%select{function|block|method|kernel function}0 call, "
+   "expected at most %1, have %2; did you mean %3?">;
+ 
+ def err_arc_typecheck_convert_incompatible_pointer : Error<
+   "incompatible pointer types passing retainable parameter of type %0"
+   "to a CF function expecting %1 type">;
+ 
+ def err_builtin_fn_use : Error<"builtin functions must be directly called">;
+ 
+ def warn_call_wrong_number_of_arguments : Warning<
+   "too %select{few|many}0 arguments in call to %1">;
+ def err_atomic_builtin_must_be_pointer : Error<
+   "address argument to atomic builtin must be a pointer (%0 invalid)">;
+ def err_atomic_builtin_must_be_pointer_intptr : Error<
+   "address argument to atomic builtin must be a pointer to integer or pointer"
+   " (%0 invalid)">;
+ def err_atomic_builtin_cannot_be_const : Error<
+   "address argument to atomic builtin cannot be const-qualified (%0 invalid)">;
+ def err_atomic_builtin_must_be_pointer_intfltptr : Error<
+   "address argument to atomic builtin must be a pointer to integer,"
+   " floating-point or pointer (%0 invalid)">;
+ def err_atomic_builtin_pointer_size : Error<
+   "address argument to atomic builtin must be a pointer to 1,2,4,8 or 16 byte "
+   "type (%0 invalid)">;
+ def err_atomic_exclusive_builtin_pointer_size : Error<
+   "address argument to load or store exclusive builtin must be a pointer to"
+   " 1,2,4 or 8 byte type (%0 invalid)">;
+ def err_atomic_builtin_ext_int_size : Error<
+   "Atomic memory operand must have a power-of-two size">;
+ def err_atomic_builtin_ext_int_prohibit : Error<
+   "argument to atomic builtin of type '_ExtInt' is not supported">;
+ def err_atomic_op_needs_atomic : Error<
+   "address argument to atomic operation must be a pointer to _Atomic "
+   "type (%0 invalid)">;
+ def err_atomic_op_needs_non_const_atomic : Error<
+   "address argument to atomic operation must be a pointer to non-%select{const|constant}0 _Atomic "
+   "type (%1 invalid)">;
+ def err_atomic_op_needs_non_const_pointer : Error<
+   "address argument to atomic operation must be a pointer to non-const "
+   "type (%0 invalid)">;
+ def err_atomic_op_needs_trivial_copy : Error<
+   "address argument to atomic operation must be a pointer to a "
+   "trivially-copyable type (%0 invalid)">;
+ def err_atomic_op_needs_atomic_int_ptr_or_fp : Error<
+   "address argument to atomic operation must be a pointer to %select{|atomic }0"
+   "integer, pointer or supported floating point type (%1 invalid)">;
+ def err_atomic_op_needs_atomic_int_or_ptr : Error<
+   "address argument to atomic operation must be a pointer to %select{|atomic }0"
+   "integer or pointer (%1 invalid)">;
+ def err_atomic_op_needs_atomic_int : Error<
+   "address argument to atomic operation must be a pointer to "
+   "%select{|atomic }0integer (%1 invalid)">;
+ def warn_atomic_op_has_invalid_memory_order : Warning<
+   "memory order argument to atomic operation is invalid">,
+   InGroup<DiagGroup<"atomic-memory-ordering">>;
+ def err_atomic_op_has_invalid_synch_scope : Error<
+   "synchronization scope argument to atomic operation is invalid">;
+ def warn_atomic_implicit_seq_cst : Warning<
+   "implicit use of sequentially-consistent atomic may incur stronger memory barriers than necessary">,
+   InGroup<DiagGroup<"atomic-implicit-seq-cst">>, DefaultIgnore;
+ 
+ def err_overflow_builtin_must_be_int : Error<
+   "operand argument to overflow builtin must be an integer (%0 invalid)">;
+ def err_overflow_builtin_must_be_ptr_int : Error<
+   "result argument to overflow builtin must be a pointer "
+   "to a non-const integer (%0 invalid)">;
+ def err_overflow_builtin_ext_int_max_size : Error<
+   "__builtin_mul_overflow does not support signed _ExtInt operands of more "
+   "than %0 bits">;
+ 
+ def err_atomic_load_store_uses_lib : Error<
+   "atomic %select{load|store}0 requires runtime support that is not "
+   "available for this target">;
+ 
+ def err_nontemporal_builtin_must_be_pointer : Error<
+   "address argument to nontemporal builtin must be a pointer (%0 invalid)">;
+ def err_nontemporal_builtin_must_be_pointer_intfltptr_or_vector : Error<
+   "address argument to nontemporal builtin must be a pointer to integer, float, "
+   "pointer, or a vector of such types (%0 invalid)">;
+ 
+ def err_deleted_function_use : Error<"attempt to use a deleted function">;
+ def err_deleted_inherited_ctor_use : Error<
+   "constructor inherited by %0 from base class %1 is implicitly deleted">;
+ 
+ def note_called_by : Note<"called by %0">;
+ def err_kern_type_not_void_return : Error<
+   "kernel function type %0 must have void return type">;
+ def err_kern_is_nonstatic_method : Error<
+   "kernel function %0 must be a free function or static member function">;
+ def err_config_scalar_return : Error<
+   "CUDA special function '%0' must have scalar return type">;
+ def err_kern_call_not_global_function : Error<
+   "kernel call to non-global function %0">;
+ def err_global_call_not_config : Error<
+   "call to global function %0 not configured">;
+ def err_ref_bad_target : Error<
+   "reference to %select{__device__|__global__|__host__|__host__ __device__}0 "
+   "%select{function|variable}1 %2 in %select{__device__|__global__|__host__|__host__ __device__}3 function">;
+ def note_cuda_const_var_unpromoted : Note<
+   "const variable cannot be emitted on device side due to dynamic initialization">;
+ def note_cuda_host_var : Note<
+   "host variable declared here">;
+ def err_ref_bad_target_global_initializer : Error<
+   "reference to %select{__device__|__global__|__host__|__host__ __device__}0 "
+   "function %1 in global initializer">;
+ def err_capture_bad_target : Error<
+   "capture host variable %0 by reference in device or host device lambda function">;
+ def warn_maybe_capture_bad_target_this_ptr : Warning<
+   "capture host side class data member by this pointer in device or host device lambda function "
+   "may result in invalid memory access if this pointer is not accessible on device side">,
+   InGroup<DiagGroup<"gpu-maybe-wrong-side">>;
+ def warn_kern_is_method : Extension<
+   "kernel function %0 is a member function; this may not be accepted by nvcc">,
+   InGroup<CudaCompat>;
+ def warn_kern_is_inline : Warning<
+   "ignored 'inline' attribute on kernel function %0">,
+   InGroup<CudaCompat>;
+ def err_variadic_device_fn : Error<
+   "CUDA device code does not support variadic functions">;
+ def err_va_arg_in_device : Error<
+   "CUDA device code does not support va_arg">;
+ def err_alias_not_supported_on_nvptx : Error<"CUDA does not support aliases">;
+ def err_cuda_unattributed_constexpr_cannot_overload_device : Error<
+   "constexpr function %0 without __host__ or __device__ attributes cannot "
+   "overload __device__ function with same signature.  Add a __host__ "
+   "attribute, or build with -fno-cuda-host-device-constexpr.">;
+ def note_cuda_conflicting_device_function_declared_here : Note<
+   "conflicting __device__ function declared here">;
+ def err_cuda_device_exceptions : Error<
+   "cannot use '%0' in "
+   "%select{__device__|__global__|__host__|__host__ __device__}1 function">;
+ def err_dynamic_var_init : Error<
+     "dynamic initialization is not supported for "
+     "__device__, __constant__, __shared__, and __managed__ variables.">;
+ def err_shared_var_init : Error<
+     "initialization is not supported for __shared__ variables.">;
+ def err_cuda_vla : Error<
+     "cannot use variable-length arrays in "
+     "%select{__device__|__global__|__host__|__host__ __device__}0 functions">;
+diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
+index c3c653f6889e..56b07dfaa09f 100644
+--- a/clang/lib/Sema/SemaChecking.cpp
++++ b/clang/lib/Sema/SemaChecking.cpp
+@@ -12221,1998 +12221,2012 @@ static void DiagnoseImpCast(Sema &S, Expr *E, QualType SourceType, QualType T,
+ 
+ /// Diagnose an implicit cast;  purely a helper for CheckImplicitConversion.
+ static void DiagnoseImpCast(Sema &S, Expr *E, QualType T,
+                             SourceLocation CContext,
+                             unsigned diag, bool pruneControlFlow = false) {
+   DiagnoseImpCast(S, E, E->getType(), T, CContext, diag, pruneControlFlow);
+ }
+ 
+ static bool isObjCSignedCharBool(Sema &S, QualType Ty) {
+   return Ty->isSpecificBuiltinType(BuiltinType::SChar) &&
+       S.getLangOpts().ObjC && S.NSAPIObj->isObjCBOOLType(Ty);
+ }
+ 
+ static void adornObjCBoolConversionDiagWithTernaryFixit(
+     Sema &S, Expr *SourceExpr, const Sema::SemaDiagnosticBuilder &Builder) {
+   Expr *Ignored = SourceExpr->IgnoreImplicit();
+   if (const auto *OVE = dyn_cast<OpaqueValueExpr>(Ignored))
+     Ignored = OVE->getSourceExpr();
+   bool NeedsParens = isa<AbstractConditionalOperator>(Ignored) ||
+                      isa<BinaryOperator>(Ignored) ||
+                      isa<CXXOperatorCallExpr>(Ignored);
+   SourceLocation EndLoc = S.getLocForEndOfToken(SourceExpr->getEndLoc());
+   if (NeedsParens)
+     Builder << FixItHint::CreateInsertion(SourceExpr->getBeginLoc(), "(")
+             << FixItHint::CreateInsertion(EndLoc, ")");
+   Builder << FixItHint::CreateInsertion(EndLoc, " ? YES : NO");
+ }
+ 
+ /// Diagnose an implicit cast from a floating point value to an integer value.
+ static void DiagnoseFloatingImpCast(Sema &S, Expr *E, QualType T,
+                                     SourceLocation CContext) {
+   const bool IsBool = T->isSpecificBuiltinType(BuiltinType::Bool);
+   const bool PruneWarnings = S.inTemplateInstantiation();
+ 
+   Expr *InnerE = E->IgnoreParenImpCasts();
+   // We also want to warn on, e.g., "int i = -1.234"
+   if (UnaryOperator *UOp = dyn_cast<UnaryOperator>(InnerE))
+     if (UOp->getOpcode() == UO_Minus || UOp->getOpcode() == UO_Plus)
+       InnerE = UOp->getSubExpr()->IgnoreParenImpCasts();
+ 
+   const bool IsLiteral =
+       isa<FloatingLiteral>(E) || isa<FloatingLiteral>(InnerE);
+ 
+   llvm::APFloat Value(0.0);
+   bool IsConstant =
+     E->EvaluateAsFloat(Value, S.Context, Expr::SE_AllowSideEffects);
+   if (!IsConstant) {
+     if (isObjCSignedCharBool(S, T)) {
+       return adornObjCBoolConversionDiagWithTernaryFixit(
+           S, E,
+           S.Diag(CContext, diag::warn_impcast_float_to_objc_signed_char_bool)
+               << E->getType());
+     }
+ 
+     return DiagnoseImpCast(S, E, T, CContext,
+                            diag::warn_impcast_float_integer, PruneWarnings);
+   }
+ 
+   bool isExact = false;
+ 
+   llvm::APSInt IntegerValue(S.Context.getIntWidth(T),
+                             T->hasUnsignedIntegerRepresentation());
+   llvm::APFloat::opStatus Result = Value.convertToInteger(
+       IntegerValue, llvm::APFloat::rmTowardZero, &isExact);
+ 
+   // FIXME: Force the precision of the source value down so we don't print
+   // digits which are usually useless (we don't really care here if we
+   // truncate a digit by accident in edge cases).  Ideally, APFloat::toString
+   // would automatically print the shortest representation, but it's a bit
+   // tricky to implement.
+   SmallString<16> PrettySourceValue;
+   unsigned precision = llvm::APFloat::semanticsPrecision(Value.getSemantics());
+   precision = (precision * 59 + 195) / 196;
+   Value.toString(PrettySourceValue, precision);
+ 
+   if (isObjCSignedCharBool(S, T) && IntegerValue != 0 && IntegerValue != 1) {
+     return adornObjCBoolConversionDiagWithTernaryFixit(
+         S, E,
+         S.Diag(CContext, diag::warn_impcast_constant_value_to_objc_bool)
+             << PrettySourceValue);
+   }
+ 
+   if (Result == llvm::APFloat::opOK && isExact) {
+     if (IsLiteral) return;
+     return DiagnoseImpCast(S, E, T, CContext, diag::warn_impcast_float_integer,
+                            PruneWarnings);
+   }
+ 
+   // Conversion of a floating-point value to a non-bool integer where the
+   // integral part cannot be represented by the integer type is undefined.
+   if (!IsBool && Result == llvm::APFloat::opInvalidOp)
+     return DiagnoseImpCast(
+         S, E, T, CContext,
+         IsLiteral ? diag::warn_impcast_literal_float_to_integer_out_of_range
+                   : diag::warn_impcast_float_to_integer_out_of_range,
+         PruneWarnings);
+ 
+   unsigned DiagID = 0;
+   if (IsLiteral) {
+     // Warn on floating point literal to integer.
+     DiagID = diag::warn_impcast_literal_float_to_integer;
+   } else if (IntegerValue == 0) {
+     if (Value.isZero()) {  // Skip -0.0 to 0 conversion.
+       return DiagnoseImpCast(S, E, T, CContext,
+                              diag::warn_impcast_float_integer, PruneWarnings);
+     }
+     // Warn on non-zero to zero conversion.
+     DiagID = diag::warn_impcast_float_to_integer_zero;
+   } else {
+     if (IntegerValue.isUnsigned()) {
+       if (!IntegerValue.isMaxValue()) {
+         return DiagnoseImpCast(S, E, T, CContext,
+                                diag::warn_impcast_float_integer, PruneWarnings);
+       }
+     } else {  // IntegerValue.isSigned()
+       if (!IntegerValue.isMaxSignedValue() &&
+           !IntegerValue.isMinSignedValue()) {
+         return DiagnoseImpCast(S, E, T, CContext,
+                                diag::warn_impcast_float_integer, PruneWarnings);
+       }
+     }
+     // Warn on evaluatable floating point expression to integer conversion.
+     DiagID = diag::warn_impcast_float_to_integer;
+   }
+ 
+   SmallString<16> PrettyTargetValue;
+   if (IsBool)
+     PrettyTargetValue = Value.isZero() ? "false" : "true";
+   else
+     IntegerValue.toString(PrettyTargetValue);
+ 
+   if (PruneWarnings) {
+     S.DiagRuntimeBehavior(E->getExprLoc(), E,
+                           S.PDiag(DiagID)
+                               << E->getType() << T.getUnqualifiedType()
+                               << PrettySourceValue << PrettyTargetValue
+                               << E->getSourceRange() << SourceRange(CContext));
+   } else {
+     S.Diag(E->getExprLoc(), DiagID)
+         << E->getType() << T.getUnqualifiedType() << PrettySourceValue
+         << PrettyTargetValue << E->getSourceRange() << SourceRange(CContext);
+   }
+ }
+ 
+ /// Analyze the given compound assignment for the possible losing of
+ /// floating-point precision.
+ static void AnalyzeCompoundAssignment(Sema &S, BinaryOperator *E) {
+   assert(isa<CompoundAssignOperator>(E) &&
+          "Must be compound assignment operation");
+   // Recurse on the LHS and RHS in here
+   AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
+   AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
+ 
+   if (E->getLHS()->getType()->isAtomicType())
+     S.Diag(E->getOperatorLoc(), diag::warn_atomic_implicit_seq_cst);
+ 
+   // Now check the outermost expression
+   const auto *ResultBT = E->getLHS()->getType()->getAs<BuiltinType>();
+   const auto *RBT = cast<CompoundAssignOperator>(E)
+                         ->getComputationResultType()
+                         ->getAs<BuiltinType>();
+ 
+   // The below checks assume source is floating point.
+   if (!ResultBT || !RBT || !RBT->isFloatingPoint()) return;
+ 
+   // If source is floating point but target is an integer.
+   if (ResultBT->isInteger())
+     return DiagnoseImpCast(S, E, E->getRHS()->getType(), E->getLHS()->getType(),
+                            E->getExprLoc(), diag::warn_impcast_float_integer);
+ 
+   if (!ResultBT->isFloatingPoint())
+     return;
+ 
+   // If both source and target are floating points, warn about losing precision.
+   int Order = S.getASTContext().getFloatingTypeSemanticOrder(
+       QualType(ResultBT, 0), QualType(RBT, 0));
+   if (Order < 0 && !S.SourceMgr.isInSystemMacro(E->getOperatorLoc()))
+     // warn about dropping FP rank.
+     DiagnoseImpCast(S, E->getRHS(), E->getLHS()->getType(), E->getOperatorLoc(),
+                     diag::warn_impcast_float_result_precision);
+ }
+ 
+ static std::string PrettyPrintInRange(const llvm::APSInt &Value,
+                                       IntRange Range) {
+   if (!Range.Width) return "0";
+ 
+   llvm::APSInt ValueInRange = Value;
+   ValueInRange.setIsSigned(!Range.NonNegative);
+   ValueInRange = ValueInRange.trunc(Range.Width);
+   return toString(ValueInRange, 10);
+ }
+ 
+ static bool IsImplicitBoolFloatConversion(Sema &S, Expr *Ex, bool ToBool) {
+   if (!isa<ImplicitCastExpr>(Ex))
+     return false;
+ 
+   Expr *InnerE = Ex->IgnoreParenImpCasts();
+   const Type *Target = S.Context.getCanonicalType(Ex->getType()).getTypePtr();
+   const Type *Source =
+     S.Context.getCanonicalType(InnerE->getType()).getTypePtr();
+   if (Target->isDependentType())
+     return false;
+ 
+   const BuiltinType *FloatCandidateBT =
+     dyn_cast<BuiltinType>(ToBool ? Source : Target);
+   const Type *BoolCandidateType = ToBool ? Target : Source;
+ 
+   return (BoolCandidateType->isSpecificBuiltinType(BuiltinType::Bool) &&
+           FloatCandidateBT && (FloatCandidateBT->isFloatingPoint()));
+ }
+ 
+ static void CheckImplicitArgumentConversions(Sema &S, CallExpr *TheCall,
+                                              SourceLocation CC) {
+   unsigned NumArgs = TheCall->getNumArgs();
+   for (unsigned i = 0; i < NumArgs; ++i) {
+     Expr *CurrA = TheCall->getArg(i);
+     if (!IsImplicitBoolFloatConversion(S, CurrA, true))
+       continue;
+ 
+     bool IsSwapped = ((i > 0) &&
+         IsImplicitBoolFloatConversion(S, TheCall->getArg(i - 1), false));
+     IsSwapped |= ((i < (NumArgs - 1)) &&
+         IsImplicitBoolFloatConversion(S, TheCall->getArg(i + 1), false));
+     if (IsSwapped) {
+       // Warn on this floating-point to bool conversion.
+       DiagnoseImpCast(S, CurrA->IgnoreParenImpCasts(),
+                       CurrA->getType(), CC,
+                       diag::warn_impcast_floating_point_to_bool);
+     }
+   }
+ }
+ 
+ static void DiagnoseNullConversion(Sema &S, Expr *E, QualType T,
+                                    SourceLocation CC) {
+   if (S.Diags.isIgnored(diag::warn_impcast_null_pointer_to_integer,
+                         E->getExprLoc()))
+     return;
+ 
+   // Don't warn on functions which have return type nullptr_t.
+   if (isa<CallExpr>(E))
+     return;
+ 
+   // Check for NULL (GNUNull) or nullptr (CXX11_nullptr).
+   const Expr::NullPointerConstantKind NullKind =
+       E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull);
+   if (NullKind != Expr::NPCK_GNUNull && NullKind != Expr::NPCK_CXX11_nullptr)
+     return;
+ 
+   // Return if target type is a safe conversion.
+   if (T->isAnyPointerType() || T->isBlockPointerType() ||
+       T->isMemberPointerType() || !T->isScalarType() || T->isNullPtrType())
+     return;
+ 
+   SourceLocation Loc = E->getSourceRange().getBegin();
+ 
+   // Venture through the macro stacks to get to the source of macro arguments.
+   // The new location is a better location than the complete location that was
+   // passed in.
+   Loc = S.SourceMgr.getTopMacroCallerLoc(Loc);
+   CC = S.SourceMgr.getTopMacroCallerLoc(CC);
+ 
+   // __null is usually wrapped in a macro.  Go up a macro if that is the case.
+   if (NullKind == Expr::NPCK_GNUNull && Loc.isMacroID()) {
+     StringRef MacroName = Lexer::getImmediateMacroNameForDiagnostics(
+         Loc, S.SourceMgr, S.getLangOpts());
+     if (MacroName == "NULL")
+       Loc = S.SourceMgr.getImmediateExpansionRange(Loc).getBegin();
+   }
+ 
+   // Only warn if the null and context location are in the same macro expansion.
+   if (S.SourceMgr.getFileID(Loc) != S.SourceMgr.getFileID(CC))
+     return;
+ 
+   S.Diag(Loc, diag::warn_impcast_null_pointer_to_integer)
+       << (NullKind == Expr::NPCK_CXX11_nullptr) << T << SourceRange(CC)
+       << FixItHint::CreateReplacement(Loc,
+                                       S.getFixItZeroLiteralForType(T, Loc));
+ }
+ 
+ static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
+                                   ObjCArrayLiteral *ArrayLiteral);
+ 
+ static void
+ checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
+                            ObjCDictionaryLiteral *DictionaryLiteral);
+ 
+ /// Check a single element within a collection literal against the
+ /// target element type.
+ static void checkObjCCollectionLiteralElement(Sema &S,
+                                               QualType TargetElementType,
+                                               Expr *Element,
+                                               unsigned ElementKind) {
+   // Skip a bitcast to 'id' or qualified 'id'.
+   if (auto ICE = dyn_cast<ImplicitCastExpr>(Element)) {
+     if (ICE->getCastKind() == CK_BitCast &&
+         ICE->getSubExpr()->getType()->getAs<ObjCObjectPointerType>())
+       Element = ICE->getSubExpr();
+   }
+ 
+   QualType ElementType = Element->getType();
+   ExprResult ElementResult(Element);
+   if (ElementType->getAs<ObjCObjectPointerType>() &&
+       S.CheckSingleAssignmentConstraints(TargetElementType,
+                                          ElementResult,
+                                          false, false)
+         != Sema::Compatible) {
+     S.Diag(Element->getBeginLoc(), diag::warn_objc_collection_literal_element)
+         << ElementType << ElementKind << TargetElementType
+         << Element->getSourceRange();
+   }
+ 
+   if (auto ArrayLiteral = dyn_cast<ObjCArrayLiteral>(Element))
+     checkObjCArrayLiteral(S, TargetElementType, ArrayLiteral);
+   else if (auto DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(Element))
+     checkObjCDictionaryLiteral(S, TargetElementType, DictionaryLiteral);
+ }
+ 
+ /// Check an Objective-C array literal being converted to the given
+ /// target type.
+ static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
+                                   ObjCArrayLiteral *ArrayLiteral) {
+   if (!S.NSArrayDecl)
+     return;
+ 
+   const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
+   if (!TargetObjCPtr)
+     return;
+ 
+   if (TargetObjCPtr->isUnspecialized() ||
+       TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
+         != S.NSArrayDecl->getCanonicalDecl())
+     return;
+ 
+   auto TypeArgs = TargetObjCPtr->getTypeArgs();
+   if (TypeArgs.size() != 1)
+     return;
+ 
+   QualType TargetElementType = TypeArgs[0];
+   for (unsigned I = 0, N = ArrayLiteral->getNumElements(); I != N; ++I) {
+     checkObjCCollectionLiteralElement(S, TargetElementType,
+                                       ArrayLiteral->getElement(I),
+                                       0);
+   }
+ }
+ 
+ /// Check an Objective-C dictionary literal being converted to the given
+ /// target type.
+ static void
+ checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
+                            ObjCDictionaryLiteral *DictionaryLiteral) {
+   if (!S.NSDictionaryDecl)
+     return;
+ 
+   const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
+   if (!TargetObjCPtr)
+     return;
+ 
+   if (TargetObjCPtr->isUnspecialized() ||
+       TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
+         != S.NSDictionaryDecl->getCanonicalDecl())
+     return;
+ 
+   auto TypeArgs = TargetObjCPtr->getTypeArgs();
+   if (TypeArgs.size() != 2)
+     return;
+ 
+   QualType TargetKeyType = TypeArgs[0];
+   QualType TargetObjectType = TypeArgs[1];
+   for (unsigned I = 0, N = DictionaryLiteral->getNumElements(); I != N; ++I) {
+     auto Element = DictionaryLiteral->getKeyValueElement(I);
+     checkObjCCollectionLiteralElement(S, TargetKeyType, Element.Key, 1);
+     checkObjCCollectionLiteralElement(S, TargetObjectType, Element.Value, 2);
+   }
+ }
+ 
+ // Helper function to filter out cases for constant width constant conversion.
+ // Don't warn on char array initialization or for non-decimal values.
+ static bool isSameWidthConstantConversion(Sema &S, Expr *E, QualType T,
+                                           SourceLocation CC) {
+   // If initializing from a constant, and the constant starts with '0',
+   // then it is a binary, octal, or hexadecimal.  Allow these constants
+   // to fill all the bits, even if there is a sign change.
+   if (auto *IntLit = dyn_cast<IntegerLiteral>(E->IgnoreParenImpCasts())) {
+     const char FirstLiteralCharacter =
+         S.getSourceManager().getCharacterData(IntLit->getBeginLoc())[0];
+     if (FirstLiteralCharacter == '0')
+       return false;
+   }
+ 
+   // If the CC location points to a '{', and the type is char, then assume
+   // assume it is an array initialization.
+   if (CC.isValid() && T->isCharType()) {
+     const char FirstContextCharacter =
+         S.getSourceManager().getCharacterData(CC)[0];
+     if (FirstContextCharacter == '{')
+       return false;
+   }
+ 
+   return true;
+ }
+ 
+ static const IntegerLiteral *getIntegerLiteral(Expr *E) {
+   const auto *IL = dyn_cast<IntegerLiteral>(E);
+   if (!IL) {
+     if (auto *UO = dyn_cast<UnaryOperator>(E)) {
+       if (UO->getOpcode() == UO_Minus)
+         return dyn_cast<IntegerLiteral>(UO->getSubExpr());
+     }
+   }
+ 
+   return IL;
+ }
+ 
+ static void DiagnoseIntInBoolContext(Sema &S, Expr *E) {
+   E = E->IgnoreParenImpCasts();
+   SourceLocation ExprLoc = E->getExprLoc();
+ 
+   if (const auto *BO = dyn_cast<BinaryOperator>(E)) {
+     BinaryOperator::Opcode Opc = BO->getOpcode();
+     Expr::EvalResult Result;
+     // Do not diagnose unsigned shifts.
+     if (Opc == BO_Shl) {
+       const auto *LHS = getIntegerLiteral(BO->getLHS());
+       const auto *RHS = getIntegerLiteral(BO->getRHS());
+       if (LHS && LHS->getValue() == 0)
+         S.Diag(ExprLoc, diag::warn_left_shift_always) << 0;
+       else if (!E->isValueDependent() && LHS && RHS &&
+                RHS->getValue().isNonNegative() &&
+                E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects))
+         S.Diag(ExprLoc, diag::warn_left_shift_always)
+             << (Result.Val.getInt() != 0);
+       else if (E->getType()->isSignedIntegerType())
+         S.Diag(ExprLoc, diag::warn_left_shift_in_bool_context) << E;
+     }
+   }
+ 
+   if (const auto *CO = dyn_cast<ConditionalOperator>(E)) {
+     const auto *LHS = getIntegerLiteral(CO->getTrueExpr());
+     const auto *RHS = getIntegerLiteral(CO->getFalseExpr());
+     if (!LHS || !RHS)
+       return;
+     if ((LHS->getValue() == 0 || LHS->getValue() == 1) &&
+         (RHS->getValue() == 0 || RHS->getValue() == 1))
+       // Do not diagnose common idioms.
+       return;
+     if (LHS->getValue() != 0 && RHS->getValue() != 0)
+       S.Diag(ExprLoc, diag::warn_integer_constants_in_conditional_always_true);
+   }
+ }
+ 
+ static void CheckImplicitConversion(Sema &S, Expr *E, QualType T,
+                                     SourceLocation CC,
+                                     bool *ICContext = nullptr,
+                                     bool IsListInit = false) {
+   if (E->isTypeDependent() || E->isValueDependent()) return;
+ 
+   const Type *Source = S.Context.getCanonicalType(E->getType()).getTypePtr();
+   const Type *Target = S.Context.getCanonicalType(T).getTypePtr();
+   if (Source == Target) return;
+   if (Target->isDependentType()) return;
+ 
+   // If the conversion context location is invalid don't complain. We also
+   // don't want to emit a warning if the issue occurs from the expansion of
+   // a system macro. The problem is that 'getSpellingLoc()' is slow, so we
+   // delay this check as long as possible. Once we detect we are in that
+   // scenario, we just return.
+   if (CC.isInvalid())
+     return;
+ 
+   if (Source->isAtomicType())
+     S.Diag(E->getExprLoc(), diag::warn_atomic_implicit_seq_cst);
+ 
+   // Diagnose implicit casts to bool.
+   if (Target->isSpecificBuiltinType(BuiltinType::Bool)) {
+     if (isa<StringLiteral>(E))
+       // Warn on string literal to bool.  Checks for string literals in logical
+       // and expressions, for instance, assert(0 && "error here"), are
+       // prevented by a check in AnalyzeImplicitConversions().
+       return DiagnoseImpCast(S, E, T, CC,
+                              diag::warn_impcast_string_literal_to_bool);
+     if (isa<ObjCStringLiteral>(E) || isa<ObjCArrayLiteral>(E) ||
+         isa<ObjCDictionaryLiteral>(E) || isa<ObjCBoxedExpr>(E)) {
+       // This covers the literal expressions that evaluate to Objective-C
+       // objects.
+       return DiagnoseImpCast(S, E, T, CC,
+                              diag::warn_impcast_objective_c_literal_to_bool);
+     }
+     if (Source->isPointerType() || Source->canDecayToPointerType()) {
+       // Warn on pointer to bool conversion that is always true.
+       S.DiagnoseAlwaysNonNullPointer(E, Expr::NPCK_NotNull, /*IsEqual*/ false,
+                                      SourceRange(CC));
+     }
+   }
+ 
+   // If the we're converting a constant to an ObjC BOOL on a platform where BOOL
+   // is a typedef for signed char (macOS), then that constant value has to be 1
+   // or 0.
+   if (isObjCSignedCharBool(S, T) && Source->isIntegralType(S.Context)) {
+     Expr::EvalResult Result;
+     if (E->EvaluateAsInt(Result, S.getASTContext(),
+                          Expr::SE_AllowSideEffects)) {
+       if (Result.Val.getInt() != 1 && Result.Val.getInt() != 0) {
+         adornObjCBoolConversionDiagWithTernaryFixit(
+             S, E,
+             S.Diag(CC, diag::warn_impcast_constant_value_to_objc_bool)
+                 << toString(Result.Val.getInt(), 10));
+       }
+       return;
+     }
+   }
+ 
+   // Check implicit casts from Objective-C collection literals to specialized
+   // collection types, e.g., NSArray<NSString *> *.
+   if (auto *ArrayLiteral = dyn_cast<ObjCArrayLiteral>(E))
+     checkObjCArrayLiteral(S, QualType(Target, 0), ArrayLiteral);
+   else if (auto *DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(E))
+     checkObjCDictionaryLiteral(S, QualType(Target, 0), DictionaryLiteral);
+ 
+   // Strip vector types.
+   if (isa<VectorType>(Source)) {
+     if (Target->isVLSTBuiltinType() &&
+         (S.Context.areCompatibleSveTypes(QualType(Target, 0),
+                                          QualType(Source, 0)) ||
+          S.Context.areLaxCompatibleSveTypes(QualType(Target, 0),
+                                             QualType(Source, 0))))
+       return;
+ 
+     if (!isa<VectorType>(Target)) {
+       if (S.SourceMgr.isInSystemMacro(CC))
+         return;
+       return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_vector_scalar);
+     }
+ 
+     // If the vector cast is cast between two vectors of the same size, it is
+     // a bitcast, not a conversion.
+     if (S.Context.getTypeSize(Source) == S.Context.getTypeSize(Target))
+       return;
+ 
+     Source = cast<VectorType>(Source)->getElementType().getTypePtr();
+     Target = cast<VectorType>(Target)->getElementType().getTypePtr();
+   }
+   if (auto VecTy = dyn_cast<VectorType>(Target))
+     Target = VecTy->getElementType().getTypePtr();
+ 
+   // Strip complex types.
+   if (isa<ComplexType>(Source)) {
+     if (!isa<ComplexType>(Target)) {
+       if (S.SourceMgr.isInSystemMacro(CC) || Target->isBooleanType())
+         return;
+ 
+       return DiagnoseImpCast(S, E, T, CC,
+                              S.getLangOpts().CPlusPlus
+                                  ? diag::err_impcast_complex_scalar
+                                  : diag::warn_impcast_complex_scalar);
+     }
+ 
+     Source = cast<ComplexType>(Source)->getElementType().getTypePtr();
+     Target = cast<ComplexType>(Target)->getElementType().getTypePtr();
+   }
+ 
+   const BuiltinType *SourceBT = dyn_cast<BuiltinType>(Source);
+   const BuiltinType *TargetBT = dyn_cast<BuiltinType>(Target);
+ 
+   // If the source is floating point...
+   if (SourceBT && SourceBT->isFloatingPoint()) {
+     // ...and the target is floating point...
+     if (TargetBT && TargetBT->isFloatingPoint()) {
+       // ...then warn if we're dropping FP rank.
+ 
+       int Order = S.getASTContext().getFloatingTypeSemanticOrder(
+           QualType(SourceBT, 0), QualType(TargetBT, 0));
+       if (Order > 0) {
+         // Don't warn about float constants that are precisely
+         // representable in the target type.
+         Expr::EvalResult result;
+         if (E->EvaluateAsRValue(result, S.Context)) {
+           // Value might be a float, a float vector, or a float complex.
+           if (IsSameFloatAfterCast(result.Val,
+                    S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)),
+                    S.Context.getFloatTypeSemantics(QualType(SourceBT, 0))))
+             return;
+         }
+ 
+         if (S.SourceMgr.isInSystemMacro(CC))
+           return;
+ 
+         DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_float_precision);
+       }
+       // ... or possibly if we're increasing rank, too
+       else if (Order < 0) {
+         if (S.SourceMgr.isInSystemMacro(CC))
+           return;
+ 
+         DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_double_promotion);
+       }
+       return;
+     }
+ 
+     // If the target is integral, always warn.
+     if (TargetBT && TargetBT->isInteger()) {
+       if (S.SourceMgr.isInSystemMacro(CC))
+         return;
+ 
+       DiagnoseFloatingImpCast(S, E, T, CC);
+     }
+ 
+     // Detect the case where a call result is converted from floating-point to
+     // to bool, and the final argument to the call is converted from bool, to
+     // discover this typo:
+     //
+     //    bool b = fabs(x < 1.0);  // should be "bool b = fabs(x) < 1.0;"
+     //
+     // FIXME: This is an incredibly special case; is there some more general
+     // way to detect this class of misplaced-parentheses bug?
+     if (Target->isBooleanType() && isa<CallExpr>(E)) {
+       // Check last argument of function call to see if it is an
+       // implicit cast from a type matching the type the result
+       // is being cast to.
+       CallExpr *CEx = cast<CallExpr>(E);
+       if (unsigned NumArgs = CEx->getNumArgs()) {
+         Expr *LastA = CEx->getArg(NumArgs - 1);
+         Expr *InnerE = LastA->IgnoreParenImpCasts();
+         if (isa<ImplicitCastExpr>(LastA) &&
+             InnerE->getType()->isBooleanType()) {
+           // Warn on this floating-point to bool conversion
+           DiagnoseImpCast(S, E, T, CC,
+                           diag::warn_impcast_floating_point_to_bool);
+         }
+       }
+     }
+     return;
+   }
+ 
+   // Valid casts involving fixed point types should be accounted for here.
+   if (Source->isFixedPointType()) {
+     if (Target->isUnsaturatedFixedPointType()) {
+       Expr::EvalResult Result;
+       if (E->EvaluateAsFixedPoint(Result, S.Context, Expr::SE_AllowSideEffects,
+                                   S.isConstantEvaluated())) {
+         llvm::APFixedPoint Value = Result.Val.getFixedPoint();
+         llvm::APFixedPoint MaxVal = S.Context.getFixedPointMax(T);
+         llvm::APFixedPoint MinVal = S.Context.getFixedPointMin(T);
+         if (Value > MaxVal || Value < MinVal) {
+           S.DiagRuntimeBehavior(E->getExprLoc(), E,
+                                 S.PDiag(diag::warn_impcast_fixed_point_range)
+                                     << Value.toString() << T
+                                     << E->getSourceRange()
+                                     << clang::SourceRange(CC));
+           return;
+         }
+       }
+     } else if (Target->isIntegerType()) {
+       Expr::EvalResult Result;
+       if (!S.isConstantEvaluated() &&
+           E->EvaluateAsFixedPoint(Result, S.Context,
+                                   Expr::SE_AllowSideEffects)) {
+         llvm::APFixedPoint FXResult = Result.Val.getFixedPoint();
+ 
+         bool Overflowed;
+         llvm::APSInt IntResult = FXResult.convertToInt(
+             S.Context.getIntWidth(T),
+             Target->isSignedIntegerOrEnumerationType(), &Overflowed);
+ 
+         if (Overflowed) {
+           S.DiagRuntimeBehavior(E->getExprLoc(), E,
+                                 S.PDiag(diag::warn_impcast_fixed_point_range)
+                                     << FXResult.toString() << T
+                                     << E->getSourceRange()
+                                     << clang::SourceRange(CC));
+           return;
+         }
+       }
+     }
+   } else if (Target->isUnsaturatedFixedPointType()) {
+     if (Source->isIntegerType()) {
+       Expr::EvalResult Result;
+       if (!S.isConstantEvaluated() &&
+           E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects)) {
+         llvm::APSInt Value = Result.Val.getInt();
+ 
+         bool Overflowed;
+         llvm::APFixedPoint IntResult = llvm::APFixedPoint::getFromIntValue(
+             Value, S.Context.getFixedPointSemantics(T), &Overflowed);
+ 
+         if (Overflowed) {
+           S.DiagRuntimeBehavior(E->getExprLoc(), E,
+                                 S.PDiag(diag::warn_impcast_fixed_point_range)
+                                     << toString(Value, /*Radix=*/10) << T
+                                     << E->getSourceRange()
+                                     << clang::SourceRange(CC));
+           return;
+         }
+       }
+     }
+   }
+ 
+   // If we are casting an integer type to a floating point type without
+   // initialization-list syntax, we might lose accuracy if the floating
+   // point type has a narrower significand than the integer type.
+   if (SourceBT && TargetBT && SourceBT->isIntegerType() &&
+       TargetBT->isFloatingType() && !IsListInit) {
+     // Determine the number of precision bits in the source integer type.
+     IntRange SourceRange = GetExprRange(S.Context, E, S.isConstantEvaluated(),
+                                         /*Approximate*/ true);
+     unsigned int SourcePrecision = SourceRange.Width;
+ 
+     // Determine the number of precision bits in the
+     // target floating point type.
+     unsigned int TargetPrecision = llvm::APFloatBase::semanticsPrecision(
+         S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)));
+ 
+     if (SourcePrecision > 0 && TargetPrecision > 0 &&
+         SourcePrecision > TargetPrecision) {
+ 
+       if (Optional<llvm::APSInt> SourceInt =
+               E->getIntegerConstantExpr(S.Context)) {
+         // If the source integer is a constant, convert it to the target
+         // floating point type. Issue a warning if the value changes
+         // during the whole conversion.
+         llvm::APFloat TargetFloatValue(
+             S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)));
+         llvm::APFloat::opStatus ConversionStatus =
+             TargetFloatValue.convertFromAPInt(
+                 *SourceInt, SourceBT->isSignedInteger(),
+                 llvm::APFloat::rmNearestTiesToEven);
+ 
+         if (ConversionStatus != llvm::APFloat::opOK) {
+           SmallString<32> PrettySourceValue;
+           SourceInt->toString(PrettySourceValue, 10);
+           SmallString<32> PrettyTargetValue;
+           TargetFloatValue.toString(PrettyTargetValue, TargetPrecision);
+ 
+           S.DiagRuntimeBehavior(
+               E->getExprLoc(), E,
+               S.PDiag(diag::warn_impcast_integer_float_precision_constant)
+                   << PrettySourceValue << PrettyTargetValue << E->getType() << T
+                   << E->getSourceRange() << clang::SourceRange(CC));
+         }
+       } else {
+         // Otherwise, the implicit conversion may lose precision.
+         DiagnoseImpCast(S, E, T, CC,
+                         diag::warn_impcast_integer_float_precision);
+       }
+     }
+   }
+ 
+   DiagnoseNullConversion(S, E, T, CC);
+ 
+   S.DiscardMisalignedMemberAddress(Target, E);
+ 
+   if (Target->isBooleanType())
+     DiagnoseIntInBoolContext(S, E);
+ 
+   if (!Source->isIntegerType() || !Target->isIntegerType())
+     return;
+ 
+   // TODO: remove this early return once the false positives for constant->bool
+   // in templates, macros, etc, are reduced or removed.
+   if (Target->isSpecificBuiltinType(BuiltinType::Bool))
+     return;
+ 
+   if (isObjCSignedCharBool(S, T) && !Source->isCharType() &&
+       !E->isKnownToHaveBooleanValue(/*Semantic=*/false)) {
+     return adornObjCBoolConversionDiagWithTernaryFixit(
+         S, E,
+         S.Diag(CC, diag::warn_impcast_int_to_objc_signed_char_bool)
+             << E->getType());
+   }
+ 
+   IntRange SourceTypeRange =
+       IntRange::forTargetOfCanonicalType(S.Context, Source);
+   IntRange LikelySourceRange =
+       GetExprRange(S.Context, E, S.isConstantEvaluated(), /*Approximate*/ true);
+   IntRange TargetRange = IntRange::forTargetOfCanonicalType(S.Context, Target);
+ 
+   if (LikelySourceRange.Width > TargetRange.Width) {
+     // If the source is a constant, use a default-on diagnostic.
+     // TODO: this should happen for bitfield stores, too.
+     Expr::EvalResult Result;
+     if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects,
+                          S.isConstantEvaluated())) {
+       llvm::APSInt Value(32);
+       Value = Result.Val.getInt();
+ 
+       if (S.SourceMgr.isInSystemMacro(CC))
+         return;
+ 
+       std::string PrettySourceValue = toString(Value, 10);
+       std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
+ 
+       S.DiagRuntimeBehavior(
+           E->getExprLoc(), E,
+           S.PDiag(diag::warn_impcast_integer_precision_constant)
+               << PrettySourceValue << PrettyTargetValue << E->getType() << T
+               << E->getSourceRange() << SourceRange(CC));
+       return;
+     }
+ 
+     // People want to build with -Wshorten-64-to-32 and not -Wconversion.
+     if (S.SourceMgr.isInSystemMacro(CC))
+       return;
+ 
+     if (TargetRange.Width == 32 && S.Context.getIntWidth(E->getType()) == 64)
+       return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_64_32,
+                              /* pruneControlFlow */ true);
+     return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_precision);
+   }
+ 
+   if (TargetRange.Width > SourceTypeRange.Width) {
+     if (auto *UO = dyn_cast<UnaryOperator>(E))
+       if (UO->getOpcode() == UO_Minus)
+         if (Source->isUnsignedIntegerType()) {
+           if (Target->isUnsignedIntegerType())
+             return DiagnoseImpCast(S, E, T, CC,
+                                    diag::warn_impcast_high_order_zero_bits);
+           if (Target->isSignedIntegerType())
+             return DiagnoseImpCast(S, E, T, CC,
+                                    diag::warn_impcast_nonnegative_result);
+         }
+   }
+ 
+   if (TargetRange.Width == LikelySourceRange.Width &&
+       !TargetRange.NonNegative && LikelySourceRange.NonNegative &&
+       Source->isSignedIntegerType()) {
+     // Warn when doing a signed to signed conversion, warn if the positive
+     // source value is exactly the width of the target type, which will
+     // cause a negative value to be stored.
+ 
+     Expr::EvalResult Result;
+     if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects) &&
+         !S.SourceMgr.isInSystemMacro(CC)) {
+       llvm::APSInt Value = Result.Val.getInt();
+       if (isSameWidthConstantConversion(S, E, T, CC)) {
+         std::string PrettySourceValue = toString(Value, 10);
+         std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
+ 
+         S.DiagRuntimeBehavior(
+             E->getExprLoc(), E,
+             S.PDiag(diag::warn_impcast_integer_precision_constant)
+                 << PrettySourceValue << PrettyTargetValue << E->getType() << T
+                 << E->getSourceRange() << SourceRange(CC));
+         return;
+       }
+     }
+ 
+     // Fall through for non-constants to give a sign conversion warning.
+   }
+ 
+   if ((TargetRange.NonNegative && !LikelySourceRange.NonNegative) ||
+       (!TargetRange.NonNegative && LikelySourceRange.NonNegative &&
+        LikelySourceRange.Width == TargetRange.Width)) {
+     if (S.SourceMgr.isInSystemMacro(CC))
+       return;
+ 
+     unsigned DiagID = diag::warn_impcast_integer_sign;
+ 
+     // Traditionally, gcc has warned about this under -Wsign-compare.
+     // We also want to warn about it in -Wconversion.
+     // So if -Wconversion is off, use a completely identical diagnostic
+     // in the sign-compare group.
+     // The conditional-checking code will
+     if (ICContext) {
+       DiagID = diag::warn_impcast_integer_sign_conditional;
+       *ICContext = true;
+     }
+ 
+     return DiagnoseImpCast(S, E, T, CC, DiagID);
+   }
+ 
+   // Diagnose conversions between different enumeration types.
+   // In C, we pretend that the type of an EnumConstantDecl is its enumeration
+   // type, to give us better diagnostics.
+   QualType SourceType = E->getType();
+   if (!S.getLangOpts().CPlusPlus) {
+     if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
+       if (EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(DRE->getDecl())) {
+         EnumDecl *Enum = cast<EnumDecl>(ECD->getDeclContext());
+         SourceType = S.Context.getTypeDeclType(Enum);
+         Source = S.Context.getCanonicalType(SourceType).getTypePtr();
+       }
+   }
+ 
+   if (const EnumType *SourceEnum = Source->getAs<EnumType>())
+     if (const EnumType *TargetEnum = Target->getAs<EnumType>())
+       if (SourceEnum->getDecl()->hasNameForLinkage() &&
+           TargetEnum->getDecl()->hasNameForLinkage() &&
+           SourceEnum != TargetEnum) {
+         if (S.SourceMgr.isInSystemMacro(CC))
+           return;
+ 
+         return DiagnoseImpCast(S, E, SourceType, T, CC,
+                                diag::warn_impcast_different_enum_types);
+       }
+ }
+ 
+ static void CheckConditionalOperator(Sema &S, AbstractConditionalOperator *E,
+                                      SourceLocation CC, QualType T);
+ 
+ static void CheckConditionalOperand(Sema &S, Expr *E, QualType T,
+                                     SourceLocation CC, bool &ICContext) {
+   E = E->IgnoreParenImpCasts();
+ 
+   if (auto *CO = dyn_cast<AbstractConditionalOperator>(E))
+     return CheckConditionalOperator(S, CO, CC, T);
+ 
+   AnalyzeImplicitConversions(S, E, CC);
+   if (E->getType() != T)
+     return CheckImplicitConversion(S, E, T, CC, &ICContext);
+ }
+ 
+ static void CheckConditionalOperator(Sema &S, AbstractConditionalOperator *E,
+                                      SourceLocation CC, QualType T) {
+   AnalyzeImplicitConversions(S, E->getCond(), E->getQuestionLoc());
+ 
+   Expr *TrueExpr = E->getTrueExpr();
+   if (auto *BCO = dyn_cast<BinaryConditionalOperator>(E))
+     TrueExpr = BCO->getCommon();
+ 
+   bool Suspicious = false;
+   CheckConditionalOperand(S, TrueExpr, T, CC, Suspicious);
+   CheckConditionalOperand(S, E->getFalseExpr(), T, CC, Suspicious);
+ 
+   if (T->isBooleanType())
+     DiagnoseIntInBoolContext(S, E);
+ 
+   // If -Wconversion would have warned about either of the candidates
+   // for a signedness conversion to the context type...
+   if (!Suspicious) return;
+ 
+   // ...but it's currently ignored...
+   if (!S.Diags.isIgnored(diag::warn_impcast_integer_sign_conditional, CC))
+     return;
+ 
+   // ...then check whether it would have warned about either of the
+   // candidates for a signedness conversion to the condition type.
+   if (E->getType() == T) return;
+ 
+   Suspicious = false;
+   CheckImplicitConversion(S, TrueExpr->IgnoreParenImpCasts(),
+                           E->getType(), CC, &Suspicious);
+   if (!Suspicious)
+     CheckImplicitConversion(S, E->getFalseExpr()->IgnoreParenImpCasts(),
+                             E->getType(), CC, &Suspicious);
+ }
+ 
+ /// Check conversion of given expression to boolean.
+ /// Input argument E is a logical expression.
+ static void CheckBoolLikeConversion(Sema &S, Expr *E, SourceLocation CC) {
+   if (S.getLangOpts().Bool)
+     return;
+   if (E->IgnoreParenImpCasts()->getType()->isAtomicType())
+     return;
+   CheckImplicitConversion(S, E->IgnoreParenImpCasts(), S.Context.BoolTy, CC);
+ }
+ 
+ namespace {
+ struct AnalyzeImplicitConversionsWorkItem {
+   Expr *E;
+   SourceLocation CC;
+   bool IsListInit;
+ };
+ }
+ 
+ /// Data recursive variant of AnalyzeImplicitConversions. Subexpressions
+ /// that should be visited are added to WorkList.
+ static void AnalyzeImplicitConversions(
+     Sema &S, AnalyzeImplicitConversionsWorkItem Item,
+     llvm::SmallVectorImpl<AnalyzeImplicitConversionsWorkItem> &WorkList) {
+   Expr *OrigE = Item.E;
+   SourceLocation CC = Item.CC;
+ 
+   QualType T = OrigE->getType();
+   Expr *E = OrigE->IgnoreParenImpCasts();
+ 
+   // Propagate whether we are in a C++ list initialization expression.
+   // If so, we do not issue warnings for implicit int-float conversion
+   // precision loss, because C++11 narrowing already handles it.
+   bool IsListInit = Item.IsListInit ||
+                     (isa<InitListExpr>(OrigE) && S.getLangOpts().CPlusPlus);
+ 
+   if (E->isTypeDependent() || E->isValueDependent())
+     return;
+ 
+   Expr *SourceExpr = E;
+   // Examine, but don't traverse into the source expression of an
+   // OpaqueValueExpr, since it may have multiple parents and we don't want to
+   // emit duplicate diagnostics. Its fine to examine the form or attempt to
+   // evaluate it in the context of checking the specific conversion to T though.
+   if (auto *OVE = dyn_cast<OpaqueValueExpr>(E))
+     if (auto *Src = OVE->getSourceExpr())
+       SourceExpr = Src;
+ 
+   if (const auto *UO = dyn_cast<UnaryOperator>(SourceExpr))
+     if (UO->getOpcode() == UO_Not &&
+         UO->getSubExpr()->isKnownToHaveBooleanValue())
+       S.Diag(UO->getBeginLoc(), diag::warn_bitwise_negation_bool)
+           << OrigE->getSourceRange() << T->isBooleanType()
+           << FixItHint::CreateReplacement(UO->getBeginLoc(), "!");
+ 
++  if (const auto *BO = dyn_cast<BinaryOperator>(SourceExpr))
++    if ((BO->getOpcode() == BO_And || BO->getOpcode() == BO_Or) &&
++        BO->getLHS()->isKnownToHaveBooleanValue() &&
++        BO->getRHS()->isKnownToHaveBooleanValue() &&
++        BO->getLHS()->HasSideEffects(S.Context) &&
++        BO->getRHS()->HasSideEffects(S.Context)) {
++      S.Diag(BO->getBeginLoc(), diag::warn_bitwise_instead_of_logical)
++          << (BO->getOpcode() == BO_And ? "&" : "|") << OrigE->getSourceRange()
++          << FixItHint::CreateReplacement(
++                 BO->getOperatorLoc(),
++                 (BO->getOpcode() == BO_And ? "&&" : "||"));
++      S.Diag(BO->getBeginLoc(), diag::note_cast_operand_to_int);
++    }
++
+   // For conditional operators, we analyze the arguments as if they
+   // were being fed directly into the output.
+   if (auto *CO = dyn_cast<AbstractConditionalOperator>(SourceExpr)) {
+     CheckConditionalOperator(S, CO, CC, T);
+     return;
+   }
+ 
+   // Check implicit argument conversions for function calls.
+   if (CallExpr *Call = dyn_cast<CallExpr>(SourceExpr))
+     CheckImplicitArgumentConversions(S, Call, CC);
+ 
+   // Go ahead and check any implicit conversions we might have skipped.
+   // The non-canonical typecheck is just an optimization;
+   // CheckImplicitConversion will filter out dead implicit conversions.
+   if (SourceExpr->getType() != T)
+     CheckImplicitConversion(S, SourceExpr, T, CC, nullptr, IsListInit);
+ 
+   // Now continue drilling into this expression.
+ 
+   if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) {
+     // The bound subexpressions in a PseudoObjectExpr are not reachable
+     // as transitive children.
+     // FIXME: Use a more uniform representation for this.
+     for (auto *SE : POE->semantics())
+       if (auto *OVE = dyn_cast<OpaqueValueExpr>(SE))
+         WorkList.push_back({OVE->getSourceExpr(), CC, IsListInit});
+   }
+ 
+   // Skip past explicit casts.
+   if (auto *CE = dyn_cast<ExplicitCastExpr>(E)) {
+     E = CE->getSubExpr()->IgnoreParenImpCasts();
+     if (!CE->getType()->isVoidType() && E->getType()->isAtomicType())
+       S.Diag(E->getBeginLoc(), diag::warn_atomic_implicit_seq_cst);
+     WorkList.push_back({E, CC, IsListInit});
+     return;
+   }
+ 
+   if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
+     // Do a somewhat different check with comparison operators.
+     if (BO->isComparisonOp())
+       return AnalyzeComparison(S, BO);
+ 
+     // And with simple assignments.
+     if (BO->getOpcode() == BO_Assign)
+       return AnalyzeAssignment(S, BO);
+     // And with compound assignments.
+     if (BO->isAssignmentOp())
+       return AnalyzeCompoundAssignment(S, BO);
+   }
+ 
+   // These break the otherwise-useful invariant below.  Fortunately,
+   // we don't really need to recurse into them, because any internal
+   // expressions should have been analyzed already when they were
+   // built into statements.
+   if (isa<StmtExpr>(E)) return;
+ 
+   // Don't descend into unevaluated contexts.
+   if (isa<UnaryExprOrTypeTraitExpr>(E)) return;
+ 
+   // Now just recurse over the expression's children.
+   CC = E->getExprLoc();
+   BinaryOperator *BO = dyn_cast<BinaryOperator>(E);
+   bool IsLogicalAndOperator = BO && BO->getOpcode() == BO_LAnd;
+   for (Stmt *SubStmt : E->children()) {
+     Expr *ChildExpr = dyn_cast_or_null<Expr>(SubStmt);
+     if (!ChildExpr)
+       continue;
+ 
+     if (IsLogicalAndOperator &&
+         isa<StringLiteral>(ChildExpr->IgnoreParenImpCasts()))
+       // Ignore checking string literals that are in logical and operators.
+       // This is a common pattern for asserts.
+       continue;
+     WorkList.push_back({ChildExpr, CC, IsListInit});
+   }
+ 
+   if (BO && BO->isLogicalOp()) {
+     Expr *SubExpr = BO->getLHS()->IgnoreParenImpCasts();
+     if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
+       ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
+ 
+     SubExpr = BO->getRHS()->IgnoreParenImpCasts();
+     if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
+       ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
+   }
+ 
+   if (const UnaryOperator *U = dyn_cast<UnaryOperator>(E)) {
+     if (U->getOpcode() == UO_LNot) {
+       ::CheckBoolLikeConversion(S, U->getSubExpr(), CC);
+     } else if (U->getOpcode() != UO_AddrOf) {
+       if (U->getSubExpr()->getType()->isAtomicType())
+         S.Diag(U->getSubExpr()->getBeginLoc(),
+                diag::warn_atomic_implicit_seq_cst);
+     }
+   }
+ }
+ 
+ /// AnalyzeImplicitConversions - Find and report any interesting
+ /// implicit conversions in the given expression.  There are a couple
+ /// of competing diagnostics here, -Wconversion and -Wsign-compare.
+ static void AnalyzeImplicitConversions(Sema &S, Expr *OrigE, SourceLocation CC,
+                                        bool IsListInit/*= false*/) {
+   llvm::SmallVector<AnalyzeImplicitConversionsWorkItem, 16> WorkList;
+   WorkList.push_back({OrigE, CC, IsListInit});
+   while (!WorkList.empty())
+     AnalyzeImplicitConversions(S, WorkList.pop_back_val(), WorkList);
+ }
+ 
+ /// Diagnose integer type and any valid implicit conversion to it.
+ static bool checkOpenCLEnqueueIntType(Sema &S, Expr *E, const QualType &IntT) {
+   // Taking into account implicit conversions,
+   // allow any integer.
+   if (!E->getType()->isIntegerType()) {
+     S.Diag(E->getBeginLoc(),
+            diag::err_opencl_enqueue_kernel_invalid_local_size_type);
+     return true;
+   }
+   // Potentially emit standard warnings for implicit conversions if enabled
+   // using -Wconversion.
+   CheckImplicitConversion(S, E, IntT, E->getBeginLoc());
+   return false;
+ }
+ 
+ // Helper function for Sema::DiagnoseAlwaysNonNullPointer.
+ // Returns true when emitting a warning about taking the address of a reference.
+ static bool CheckForReference(Sema &SemaRef, const Expr *E,
+                               const PartialDiagnostic &PD) {
+   E = E->IgnoreParenImpCasts();
+ 
+   const FunctionDecl *FD = nullptr;
+ 
+   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
+     if (!DRE->getDecl()->getType()->isReferenceType())
+       return false;
+   } else if (const MemberExpr *M = dyn_cast<MemberExpr>(E)) {
+     if (!M->getMemberDecl()->getType()->isReferenceType())
+       return false;
+   } else if (const CallExpr *Call = dyn_cast<CallExpr>(E)) {
+     if (!Call->getCallReturnType(SemaRef.Context)->isReferenceType())
+       return false;
+     FD = Call->getDirectCallee();
+   } else {
+     return false;
+   }
+ 
+   SemaRef.Diag(E->getExprLoc(), PD);
+ 
+   // If possible, point to location of function.
+   if (FD) {
+     SemaRef.Diag(FD->getLocation(), diag::note_reference_is_return_value) << FD;
+   }
+ 
+   return true;
+ }
+ 
+ // Returns true if the SourceLocation is expanded from any macro body.
+ // Returns false if the SourceLocation is invalid, is from not in a macro
+ // expansion, or is from expanded from a top-level macro argument.
+ static bool IsInAnyMacroBody(const SourceManager &SM, SourceLocation Loc) {
+   if (Loc.isInvalid())
+     return false;
+ 
+   while (Loc.isMacroID()) {
+     if (SM.isMacroBodyExpansion(Loc))
+       return true;
+     Loc = SM.getImmediateMacroCallerLoc(Loc);
+   }
+ 
+   return false;
+ }
+ 
+ /// Diagnose pointers that are always non-null.
+ /// \param E the expression containing the pointer
+ /// \param NullKind NPCK_NotNull if E is a cast to bool, otherwise, E is
+ /// compared to a null pointer
+ /// \param IsEqual True when the comparison is equal to a null pointer
+ /// \param Range Extra SourceRange to highlight in the diagnostic
+ void Sema::DiagnoseAlwaysNonNullPointer(Expr *E,
+                                         Expr::NullPointerConstantKind NullKind,
+                                         bool IsEqual, SourceRange Range) {
+   if (!E)
+     return;
+ 
+   // Don't warn inside macros.
+   if (E->getExprLoc().isMacroID()) {
+     const SourceManager &SM = getSourceManager();
+     if (IsInAnyMacroBody(SM, E->getExprLoc()) ||
+         IsInAnyMacroBody(SM, Range.getBegin()))
+       return;
+   }
+   E = E->IgnoreImpCasts();
+ 
+   const bool IsCompare = NullKind != Expr::NPCK_NotNull;
+ 
+   if (isa<CXXThisExpr>(E)) {
+     unsigned DiagID = IsCompare ? diag::warn_this_null_compare
+                                 : diag::warn_this_bool_conversion;
+     Diag(E->getExprLoc(), DiagID) << E->getSourceRange() << Range << IsEqual;
+     return;
+   }
+ 
+   bool IsAddressOf = false;
+ 
+   if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
+     if (UO->getOpcode() != UO_AddrOf)
+       return;
+     IsAddressOf = true;
+     E = UO->getSubExpr();
+   }
+ 
+   if (IsAddressOf) {
+     unsigned DiagID = IsCompare
+                           ? diag::warn_address_of_reference_null_compare
+                           : diag::warn_address_of_reference_bool_conversion;
+     PartialDiagnostic PD = PDiag(DiagID) << E->getSourceRange() << Range
+                                          << IsEqual;
+     if (CheckForReference(*this, E, PD)) {
+       return;
+     }
+   }
+ 
+   auto ComplainAboutNonnullParamOrCall = [&](const Attr *NonnullAttr) {
+     bool IsParam = isa<NonNullAttr>(NonnullAttr);
+     std::string Str;
+     llvm::raw_string_ostream S(Str);
+     E->printPretty(S, nullptr, getPrintingPolicy());
+     unsigned DiagID = IsCompare ? diag::warn_nonnull_expr_compare
+                                 : diag::warn_cast_nonnull_to_bool;
+     Diag(E->getExprLoc(), DiagID) << IsParam << S.str()
+       << E->getSourceRange() << Range << IsEqual;
+     Diag(NonnullAttr->getLocation(), diag::note_declared_nonnull) << IsParam;
+   };
+ 
+   // If we have a CallExpr that is tagged with returns_nonnull, we can complain.
+   if (auto *Call = dyn_cast<CallExpr>(E->IgnoreParenImpCasts())) {
+     if (auto *Callee = Call->getDirectCallee()) {
+       if (const Attr *A = Callee->getAttr<ReturnsNonNullAttr>()) {
+         ComplainAboutNonnullParamOrCall(A);
+         return;
+       }
+     }
+   }
+ 
+   // Expect to find a single Decl.  Skip anything more complicated.
+   ValueDecl *D = nullptr;
+   if (DeclRefExpr *R = dyn_cast<DeclRefExpr>(E)) {
+     D = R->getDecl();
+   } else if (MemberExpr *M = dyn_cast<MemberExpr>(E)) {
+     D = M->getMemberDecl();
+   }
+ 
+   // Weak Decls can be null.
+   if (!D || D->isWeak())
+     return;
+ 
+   // Check for parameter decl with nonnull attribute
+   if (const auto* PV = dyn_cast<ParmVarDecl>(D)) {
+     if (getCurFunction() &&
+         !getCurFunction()->ModifiedNonNullParams.count(PV)) {
+       if (const Attr *A = PV->getAttr<NonNullAttr>()) {
+         ComplainAboutNonnullParamOrCall(A);
+         return;
+       }
+ 
+       if (const auto *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
+         // Skip function template not specialized yet.
+         if (FD->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate)
+           return;
+         auto ParamIter = llvm::find(FD->parameters(), PV);
+         assert(ParamIter != FD->param_end());
+         unsigned ParamNo = std::distance(FD->param_begin(), ParamIter);
+ 
+         for (const auto *NonNull : FD->specific_attrs<NonNullAttr>()) {
+           if (!NonNull->args_size()) {
+               ComplainAboutNonnullParamOrCall(NonNull);
+               return;
+           }
+ 
+           for (const ParamIdx &ArgNo : NonNull->args()) {
+             if (ArgNo.getASTIndex() == ParamNo) {
+               ComplainAboutNonnullParamOrCall(NonNull);
+               return;
+             }
+           }
+         }
+       }
+     }
+   }
+ 
+   QualType T = D->getType();
+   const bool IsArray = T->isArrayType();
+   const bool IsFunction = T->isFunctionType();
+ 
+   // Address of function is used to silence the function warning.
+   if (IsAddressOf && IsFunction) {
+     return;
+   }
+ 
+   // Found nothing.
+   if (!IsAddressOf && !IsFunction && !IsArray)
+     return;
+ 
+   // Pretty print the expression for the diagnostic.
+   std::string Str;
+   llvm::raw_string_ostream S(Str);
+   E->printPretty(S, nullptr, getPrintingPolicy());
+ 
+   unsigned DiagID = IsCompare ? diag::warn_null_pointer_compare
+                               : diag::warn_impcast_pointer_to_bool;
+   enum {
+     AddressOf,
+     FunctionPointer,
+     ArrayPointer
+   } DiagType;
+   if (IsAddressOf)
+     DiagType = AddressOf;
+   else if (IsFunction)
+     DiagType = FunctionPointer;
+   else if (IsArray)
+     DiagType = ArrayPointer;
+   else
+     llvm_unreachable("Could not determine diagnostic.");
+   Diag(E->getExprLoc(), DiagID) << DiagType << S.str() << E->getSourceRange()
+                                 << Range << IsEqual;
+ 
+   if (!IsFunction)
+     return;
+ 
+   // Suggest '&' to silence the function warning.
+   Diag(E->getExprLoc(), diag::note_function_warning_silence)
+       << FixItHint::CreateInsertion(E->getBeginLoc(), "&");
+ 
+   // Check to see if '()' fixit should be emitted.
+   QualType ReturnType;
+   UnresolvedSet<4> NonTemplateOverloads;
+   tryExprAsCall(*E, ReturnType, NonTemplateOverloads);
+   if (ReturnType.isNull())
+     return;
+ 
+   if (IsCompare) {
+     // There are two cases here.  If there is null constant, the only suggest
+     // for a pointer return type.  If the null is 0, then suggest if the return
+     // type is a pointer or an integer type.
+     if (!ReturnType->isPointerType()) {
+       if (NullKind == Expr::NPCK_ZeroExpression ||
+           NullKind == Expr::NPCK_ZeroLiteral) {
+         if (!ReturnType->isIntegerType())
+           return;
+       } else {
+         return;
+       }
+     }
+   } else { // !IsCompare
+     // For function to bool, only suggest if the function pointer has bool
+     // return type.
+     if (!ReturnType->isSpecificBuiltinType(BuiltinType::Bool))
+       return;
+   }
+   Diag(E->getExprLoc(), diag::note_function_to_function_call)
+       << FixItHint::CreateInsertion(getLocForEndOfToken(E->getEndLoc()), "()");
+ }
+ 
+ /// Diagnoses "dangerous" implicit conversions within the given
+ /// expression (which is a full expression).  Implements -Wconversion
+ /// and -Wsign-compare.
+ ///
+ /// \param CC the "context" location of the implicit conversion, i.e.
+ ///   the most location of the syntactic entity requiring the implicit
+ ///   conversion
+ void Sema::CheckImplicitConversions(Expr *E, SourceLocation CC) {
+   // Don't diagnose in unevaluated contexts.
+   if (isUnevaluatedContext())
+     return;
+ 
+   // Don't diagnose for value- or type-dependent expressions.
+   if (E->isTypeDependent() || E->isValueDependent())
+     return;
+ 
+   // Check for array bounds violations in cases where the check isn't triggered
+   // elsewhere for other Expr types (like BinaryOperators), e.g. when an
+   // ArraySubscriptExpr is on the RHS of a variable initialization.
+   CheckArrayAccess(E);
+ 
+   // This is not the right CC for (e.g.) a variable initialization.
+   AnalyzeImplicitConversions(*this, E, CC);
+ }
+ 
+ /// CheckBoolLikeConversion - Check conversion of given expression to boolean.
+ /// Input argument E is a logical expression.
+ void Sema::CheckBoolLikeConversion(Expr *E, SourceLocation CC) {
+   ::CheckBoolLikeConversion(*this, E, CC);
+ }
+ 
+ /// Diagnose when expression is an integer constant expression and its evaluation
+ /// results in integer overflow
+ void Sema::CheckForIntOverflow (Expr *E) {
+   // Use a work list to deal with nested struct initializers.
+   SmallVector<Expr *, 2> Exprs(1, E);
+ 
+   do {
+     Expr *OriginalE = Exprs.pop_back_val();
+     Expr *E = OriginalE->IgnoreParenCasts();
+ 
+     if (isa<BinaryOperator>(E)) {
+       E->EvaluateForOverflow(Context);
+       continue;
+     }
+ 
+     if (auto InitList = dyn_cast<InitListExpr>(OriginalE))
+       Exprs.append(InitList->inits().begin(), InitList->inits().end());
+     else if (isa<ObjCBoxedExpr>(OriginalE))
+       E->EvaluateForOverflow(Context);
+     else if (auto Call = dyn_cast<CallExpr>(E))
+       Exprs.append(Call->arg_begin(), Call->arg_end());
+     else if (auto Message = dyn_cast<ObjCMessageExpr>(E))
+       Exprs.append(Message->arg_begin(), Message->arg_end());
+   } while (!Exprs.empty());
+ }
+ 
+ namespace {
+ 
+ /// Visitor for expressions which looks for unsequenced operations on the
+ /// same object.
+ class SequenceChecker : public ConstEvaluatedExprVisitor<SequenceChecker> {
+   using Base = ConstEvaluatedExprVisitor<SequenceChecker>;
+ 
+   /// A tree of sequenced regions within an expression. Two regions are
+   /// unsequenced if one is an ancestor or a descendent of the other. When we
+   /// finish processing an expression with sequencing, such as a comma
+   /// expression, we fold its tree nodes into its parent, since they are
+   /// unsequenced with respect to nodes we will visit later.
+   class SequenceTree {
+     struct Value {
+       explicit Value(unsigned Parent) : Parent(Parent), Merged(false) {}
+       unsigned Parent : 31;
+       unsigned Merged : 1;
+     };
+     SmallVector<Value, 8> Values;
+ 
+   public:
+     /// A region within an expression which may be sequenced with respect
+     /// to some other region.
+     class Seq {
+       friend class SequenceTree;
+ 
+       unsigned Index;
+ 
+       explicit Seq(unsigned N) : Index(N) {}
+ 
+     public:
+       Seq() : Index(0) {}
+     };
+ 
+     SequenceTree() { Values.push_back(Value(0)); }
+     Seq root() const { return Seq(0); }
+ 
+     /// Create a new sequence of operations, which is an unsequenced
+     /// subset of \p Parent. This sequence of operations is sequenced with
+     /// respect to other children of \p Parent.
+     Seq allocate(Seq Parent) {
+       Values.push_back(Value(Parent.Index));
+       return Seq(Values.size() - 1);
+     }
+ 
+     /// Merge a sequence of operations into its parent.
+     void merge(Seq S) {
+       Values[S.Index].Merged = true;
+     }
+ 
+     /// Determine whether two operations are unsequenced. This operation
+     /// is asymmetric: \p Cur should be the more recent sequence, and \p Old
+     /// should have been merged into its parent as appropriate.
+     bool isUnsequenced(Seq Cur, Seq Old) {
+       unsigned C = representative(Cur.Index);
+       unsigned Target = representative(Old.Index);
+       while (C >= Target) {
+         if (C == Target)
+           return true;
+         C = Values[C].Parent;
+       }
+       return false;
+     }
+ 
+   private:
+     /// Pick a representative for a sequence.
+     unsigned representative(unsigned K) {
+       if (Values[K].Merged)
+         // Perform path compression as we go.
+         return Values[K].Parent = representative(Values[K].Parent);
+       return K;
+     }
+   };
+ 
+   /// An object for which we can track unsequenced uses.
+   using Object = const NamedDecl *;
+ 
+   /// Different flavors of object usage which we track. We only track the
+   /// least-sequenced usage of each kind.
+   enum UsageKind {
+     /// A read of an object. Multiple unsequenced reads are OK.
+     UK_Use,
+ 
+     /// A modification of an object which is sequenced before the value
+     /// computation of the expression, such as ++n in C++.
+     UK_ModAsValue,
+ 
+     /// A modification of an object which is not sequenced before the value
+     /// computation of the expression, such as n++.
+     UK_ModAsSideEffect,
+ 
+     UK_Count = UK_ModAsSideEffect + 1
+   };
+ 
+   /// Bundle together a sequencing region and the expression corresponding
+   /// to a specific usage. One Usage is stored for each usage kind in UsageInfo.
+   struct Usage {
+     const Expr *UsageExpr;
+     SequenceTree::Seq Seq;
+ 
+     Usage() : UsageExpr(nullptr), Seq() {}
+   };
+ 
+   struct UsageInfo {
+     Usage Uses[UK_Count];
+ 
+     /// Have we issued a diagnostic for this object already?
+     bool Diagnosed;
+ 
+     UsageInfo() : Uses(), Diagnosed(false) {}
+   };
+   using UsageInfoMap = llvm::SmallDenseMap<Object, UsageInfo, 16>;
+ 
+   Sema &SemaRef;
+ 
+   /// Sequenced regions within the expression.
+   SequenceTree Tree;
+ 
+   /// Declaration modifications and references which we have seen.
+   UsageInfoMap UsageMap;
+ 
+   /// The region we are currently within.
+   SequenceTree::Seq Region;
+ 
+   /// Filled in with declarations which were modified as a side-effect
+   /// (that is, post-increment operations).
+   SmallVectorImpl<std::pair<Object, Usage>> *ModAsSideEffect = nullptr;
+ 
+   /// Expressions to check later. We defer checking these to reduce
+   /// stack usage.
+   SmallVectorImpl<const Expr *> &WorkList;
+ 
+   /// RAII object wrapping the visitation of a sequenced subexpression of an
+   /// expression. At the end of this process, the side-effects of the evaluation
+   /// become sequenced with respect to the value computation of the result, so
+   /// we downgrade any UK_ModAsSideEffect within the evaluation to
+   /// UK_ModAsValue.
+   struct SequencedSubexpression {
+     SequencedSubexpression(SequenceChecker &Self)
+       : Self(Self), OldModAsSideEffect(Self.ModAsSideEffect) {
+       Self.ModAsSideEffect = &ModAsSideEffect;
+     }
+ 
+     ~SequencedSubexpression() {
+       for (const std::pair<Object, Usage> &M : llvm::reverse(ModAsSideEffect)) {
+         // Add a new usage with usage kind UK_ModAsValue, and then restore
+         // the previous usage with UK_ModAsSideEffect (thus clearing it if
+         // the previous one was empty).
+         UsageInfo &UI = Self.UsageMap[M.first];
+         auto &SideEffectUsage = UI.Uses[UK_ModAsSideEffect];
+         Self.addUsage(M.first, UI, SideEffectUsage.UsageExpr, UK_ModAsValue);
+         SideEffectUsage = M.second;
+       }
+       Self.ModAsSideEffect = OldModAsSideEffect;
+     }
+ 
+     SequenceChecker &Self;
+     SmallVector<std::pair<Object, Usage>, 4> ModAsSideEffect;
+     SmallVectorImpl<std::pair<Object, Usage>> *OldModAsSideEffect;
+   };
+ 
+   /// RAII object wrapping the visitation of a subexpression which we might
+   /// choose to evaluate as a constant. If any subexpression is evaluated and
+   /// found to be non-constant, this allows us to suppress the evaluation of
+   /// the outer expression.
+   class EvaluationTracker {
+   public:
+     EvaluationTracker(SequenceChecker &Self)
+         : Self(Self), Prev(Self.EvalTracker) {
+       Self.EvalTracker = this;
+     }
+ 
+     ~EvaluationTracker() {
+       Self.EvalTracker = Prev;
+       if (Prev)
+         Prev->EvalOK &= EvalOK;
+     }
+ 
+     bool evaluate(const Expr *E, bool &Result) {
+       if (!EvalOK || E->isValueDependent())
+         return false;
+       EvalOK = E->EvaluateAsBooleanCondition(
+           Result, Self.SemaRef.Context, Self.SemaRef.isConstantEvaluated());
+       return EvalOK;
+     }
+ 
+   private:
+     SequenceChecker &Self;
+     EvaluationTracker *Prev;
+     bool EvalOK = true;
+   } *EvalTracker = nullptr;
+ 
+   /// Find the object which is produced by the specified expression,
+   /// if any.
+   Object getObject(const Expr *E, bool Mod) const {
+     E = E->IgnoreParenCasts();
+     if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
+       if (Mod && (UO->getOpcode() == UO_PreInc || UO->getOpcode() == UO_PreDec))
+         return getObject(UO->getSubExpr(), Mod);
+     } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
+       if (BO->getOpcode() == BO_Comma)
+         return getObject(BO->getRHS(), Mod);
+       if (Mod && BO->isAssignmentOp())
+         return getObject(BO->getLHS(), Mod);
+     } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
+       // FIXME: Check for more interesting cases, like "x.n = ++x.n".
+       if (isa<CXXThisExpr>(ME->getBase()->IgnoreParenCasts()))
+         return ME->getMemberDecl();
+     } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
+       // FIXME: If this is a reference, map through to its value.
+       return DRE->getDecl();
+     return nullptr;
+   }
+ 
+   /// Note that an object \p O was modified or used by an expression
+   /// \p UsageExpr with usage kind \p UK. \p UI is the \p UsageInfo for
+   /// the object \p O as obtained via the \p UsageMap.
+   void addUsage(Object O, UsageInfo &UI, const Expr *UsageExpr, UsageKind UK) {
+     // Get the old usage for the given object and usage kind.
+     Usage &U = UI.Uses[UK];
+     if (!U.UsageExpr || !Tree.isUnsequenced(Region, U.Seq)) {
+       // If we have a modification as side effect and are in a sequenced
+       // subexpression, save the old Usage so that we can restore it later
+       // in SequencedSubexpression::~SequencedSubexpression.
+       if (UK == UK_ModAsSideEffect && ModAsSideEffect)
+         ModAsSideEffect->push_back(std::make_pair(O, U));
+       // Then record the new usage with the current sequencing region.
+       U.UsageExpr = UsageExpr;
+       U.Seq = Region;
+     }
+   }
+ 
+   /// Check whether a modification or use of an object \p O in an expression
+   /// \p UsageExpr conflicts with a prior usage of kind \p OtherKind. \p UI is
+   /// the \p UsageInfo for the object \p O as obtained via the \p UsageMap.
+   /// \p IsModMod is true when we are checking for a mod-mod unsequenced
+   /// usage and false we are checking for a mod-use unsequenced usage.
+   void checkUsage(Object O, UsageInfo &UI, const Expr *UsageExpr,
+                   UsageKind OtherKind, bool IsModMod) {
+     if (UI.Diagnosed)
+       return;
+ 
+     const Usage &U = UI.Uses[OtherKind];
+     if (!U.UsageExpr || !Tree.isUnsequenced(Region, U.Seq))
+       return;
+ 
+     const Expr *Mod = U.UsageExpr;
+     const Expr *ModOrUse = UsageExpr;
+     if (OtherKind == UK_Use)
+       std::swap(Mod, ModOrUse);
+ 
+     SemaRef.DiagRuntimeBehavior(
+         Mod->getExprLoc(), {Mod, ModOrUse},
+         SemaRef.PDiag(IsModMod ? diag::warn_unsequenced_mod_mod
+                                : diag::warn_unsequenced_mod_use)
+             << O << SourceRange(ModOrUse->getExprLoc()));
+     UI.Diagnosed = true;
+   }
+ 
+   // A note on note{Pre, Post}{Use, Mod}:
+   //
+   // (It helps to follow the algorithm with an expression such as
+   //  "((++k)++, k) = k" or "k = (k++, k++)". Both contain unsequenced
+   //  operations before C++17 and both are well-defined in C++17).
+   //
+   // When visiting a node which uses/modify an object we first call notePreUse
+   // or notePreMod before visiting its sub-expression(s). At this point the
+   // children of the current node have not yet been visited and so the eventual
+   // uses/modifications resulting from the children of the current node have not
+   // been recorded yet.
+   //
+   // We then visit the children of the current node. After that notePostUse or
+   // notePostMod is called. These will 1) detect an unsequenced modification
+   // as side effect (as in "k++ + k") and 2) add a new usage with the
+   // appropriate usage kind.
+   //
+   // We also have to be careful that some operation sequences modification as
+   // side effect as well (for example: || or ,). To account for this we wrap
+   // the visitation of such a sub-expression (for example: the LHS of || or ,)
+   // with SequencedSubexpression. SequencedSubexpression is an RAII object
+   // which record usages which are modifications as side effect, and then
+   // downgrade them (or more accurately restore the previous usage which was a
+   // modification as side effect) when exiting the scope of the sequenced
+   // subexpression.
+ 
+   void notePreUse(Object O, const Expr *UseExpr) {
+     UsageInfo &UI = UsageMap[O];
+     // Uses conflict with other modifications.
+     checkUsage(O, UI, UseExpr, /*OtherKind=*/UK_ModAsValue, /*IsModMod=*/false);
+   }
+ 
+   void notePostUse(Object O, const Expr *UseExpr) {
+     UsageInfo &UI = UsageMap[O];
+     checkUsage(O, UI, UseExpr, /*OtherKind=*/UK_ModAsSideEffect,
+                /*IsModMod=*/false);
+     addUsage(O, UI, UseExpr, /*UsageKind=*/UK_Use);
+   }
+ 
+   void notePreMod(Object O, const Expr *ModExpr) {
+     UsageInfo &UI = UsageMap[O];
+     // Modifications conflict with other modifications and with uses.
+     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_ModAsValue, /*IsModMod=*/true);
+     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_Use, /*IsModMod=*/false);
+   }
+ 
+   void notePostMod(Object O, const Expr *ModExpr, UsageKind UK) {
+     UsageInfo &UI = UsageMap[O];
+     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_ModAsSideEffect,
+                /*IsModMod=*/true);
+     addUsage(O, UI, ModExpr, /*UsageKind=*/UK);
+   }
+ 
+ public:
+   SequenceChecker(Sema &S, const Expr *E,
+                   SmallVectorImpl<const Expr *> &WorkList)
+       : Base(S.Context), SemaRef(S), Region(Tree.root()), WorkList(WorkList) {
+     Visit(E);
+     // Silence a -Wunused-private-field since WorkList is now unused.
+     // TODO: Evaluate if it can be used, and if not remove it.
+     (void)this->WorkList;
+   }
+ 
+   void VisitStmt(const Stmt *S) {
+     // Skip all statements which aren't expressions for now.
+   }
+ 
+   void VisitExpr(const Expr *E) {
+     // By default, just recurse to evaluated subexpressions.
+     Base::VisitStmt(E);
+   }
+ 
+   void VisitCastExpr(const CastExpr *E) {
+     Object O = Object();
+     if (E->getCastKind() == CK_LValueToRValue)
+       O = getObject(E->getSubExpr(), false);
+ 
+     if (O)
+       notePreUse(O, E);
+     VisitExpr(E);
+     if (O)
+       notePostUse(O, E);
+   }
+ 
+   void VisitSequencedExpressions(const Expr *SequencedBefore,
+                                  const Expr *SequencedAfter) {
+     SequenceTree::Seq BeforeRegion = Tree.allocate(Region);
+     SequenceTree::Seq AfterRegion = Tree.allocate(Region);
+     SequenceTree::Seq OldRegion = Region;
+ 
+     {
+       SequencedSubexpression SeqBefore(*this);
+       Region = BeforeRegion;
+       Visit(SequencedBefore);
+     }
+ 
+     Region = AfterRegion;
+     Visit(SequencedAfter);
+ 
+     Region = OldRegion;
+ 
+     Tree.merge(BeforeRegion);
+     Tree.merge(AfterRegion);
+   }
+ 
+   void VisitArraySubscriptExpr(const ArraySubscriptExpr *ASE) {
+     // C++17 [expr.sub]p1:
+     //   The expression E1[E2] is identical (by definition) to *((E1)+(E2)). The
+     //   expression E1 is sequenced before the expression E2.
+     if (SemaRef.getLangOpts().CPlusPlus17)
+       VisitSequencedExpressions(ASE->getLHS(), ASE->getRHS());
+     else {
+       Visit(ASE->getLHS());
+       Visit(ASE->getRHS());
+     }
+   }
+ 
+   void VisitBinPtrMemD(const BinaryOperator *BO) { VisitBinPtrMem(BO); }
+   void VisitBinPtrMemI(const BinaryOperator *BO) { VisitBinPtrMem(BO); }
+   void VisitBinPtrMem(const BinaryOperator *BO) {
+     // C++17 [expr.mptr.oper]p4:
+     //  Abbreviating pm-expression.*cast-expression as E1.*E2, [...]
+     //  the expression E1 is sequenced before the expression E2.
+     if (SemaRef.getLangOpts().CPlusPlus17)
+       VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
+     else {
+       Visit(BO->getLHS());
+       Visit(BO->getRHS());
+     }
+   }
+ 
+   void VisitBinShl(const BinaryOperator *BO) { VisitBinShlShr(BO); }
+   void VisitBinShr(const BinaryOperator *BO) { VisitBinShlShr(BO); }
+   void VisitBinShlShr(const BinaryOperator *BO) {
+     // C++17 [expr.shift]p4:
+     //  The expression E1 is sequenced before the expression E2.
+     if (SemaRef.getLangOpts().CPlusPlus17)
+       VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
+     else {
+       Visit(BO->getLHS());
+       Visit(BO->getRHS());
+     }
+   }
+ 
+   void VisitBinComma(const BinaryOperator *BO) {
+     // C++11 [expr.comma]p1:
+     //   Every value computation and side effect associated with the left
+     //   expression is sequenced before every value computation and side
+     //   effect associated with the right expression.
+     VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
+   }
+ 
+   void VisitBinAssign(const BinaryOperator *BO) {
+     SequenceTree::Seq RHSRegion;
+     SequenceTree::Seq LHSRegion;
+     if (SemaRef.getLangOpts().CPlusPlus17) {
+       RHSRegion = Tree.allocate(Region);
+       LHSRegion = Tree.allocate(Region);
+     } else {
+       RHSRegion = Region;
+       LHSRegion = Region;
+     }
+     SequenceTree::Seq OldRegion = Region;
+ 
+     // C++11 [expr.ass]p1:
+     //  [...] the assignment is sequenced after the value computation
+     //  of the right and left operands, [...]
+     //
+     // so check it before inspecting the operands and update the
+     // map afterwards.
+     Object O = getObject(BO->getLHS(), /*Mod=*/true);
+     if (O)
+       notePreMod(O, BO);
+ 
+     if (SemaRef.getLangOpts().CPlusPlus17) {
+       // C++17 [expr.ass]p1:
+       //  [...] The right operand is sequenced before the left operand. [...]
+       {
+         SequencedSubexpression SeqBefore(*this);
+         Region = RHSRegion;
+         Visit(BO->getRHS());
+       }
+ 
+       Region = LHSRegion;
+       Visit(BO->getLHS());
+ 
+       if (O && isa<CompoundAssignOperator>(BO))
+         notePostUse(O, BO);
+ 
+     } else {
+       // C++11 does not specify any sequencing between the LHS and RHS.
+       Region = LHSRegion;
+       Visit(BO->getLHS());
+ 
+       if (O && isa<CompoundAssignOperator>(BO))
+         notePostUse(O, BO);
+ 
+       Region = RHSRegion;
+       Visit(BO->getRHS());
+     }
+ 
+     // C++11 [expr.ass]p1:
+     //  the assignment is sequenced [...] before the value computation of the
+     //  assignment expression.
+     // C11 6.5.16/3 has no such rule.
+     Region = OldRegion;
+     if (O)
+       notePostMod(O, BO,
+                   SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
+                                                   : UK_ModAsSideEffect);
+     if (SemaRef.getLangOpts().CPlusPlus17) {
+       Tree.merge(RHSRegion);
+       Tree.merge(LHSRegion);
+     }
+   }
+ 
+   void VisitCompoundAssignOperator(const CompoundAssignOperator *CAO) {
+     VisitBinAssign(CAO);
+   }
+ 
+   void VisitUnaryPreInc(const UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
+   void VisitUnaryPreDec(const UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
+   void VisitUnaryPreIncDec(const UnaryOperator *UO) {
+     Object O = getObject(UO->getSubExpr(), true);
+     if (!O)
+       return VisitExpr(UO);
+ 
+     notePreMod(O, UO);
+     Visit(UO->getSubExpr());
+     // C++11 [expr.pre.incr]p1:
+     //   the expression ++x is equivalent to x+=1
+     notePostMod(O, UO,
+                 SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
+                                                 : UK_ModAsSideEffect);
+   }
+ 
+   void VisitUnaryPostInc(const UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
+   void VisitUnaryPostDec(const UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
+   void VisitUnaryPostIncDec(const UnaryOperator *UO) {
+     Object O = getObject(UO->getSubExpr(), true);
+     if (!O)
+       return VisitExpr(UO);
+ 
+     notePreMod(O, UO);
+     Visit(UO->getSubExpr());
+     notePostMod(O, UO, UK_ModAsSideEffect);
+   }
+ 
+   void VisitBinLOr(const BinaryOperator *BO) {
+     // C++11 [expr.log.or]p2:
+     //  If the second expression is evaluated, every value computation and
+     //  side effect associated with the first expression is sequenced before
+     //  every value computation and side effect associated with the
+     //  second expression.
+     SequenceTree::Seq LHSRegion = Tree.allocate(Region);
+     SequenceTree::Seq RHSRegion = Tree.allocate(Region);
+     SequenceTree::Seq OldRegion = Region;
+ 
+     EvaluationTracker Eval(*this);
+     {
+       SequencedSubexpression Sequenced(*this);
+       Region = LHSRegion;
+       Visit(BO->getLHS());
+     }
+ 
+     // C++11 [expr.log.or]p1:
+     //  [...] the second operand is not evaluated if the first operand
+     //  evaluates to true.
+     bool EvalResult = false;
+     bool EvalOK = Eval.evaluate(BO->getLHS(), EvalResult);
+     bool ShouldVisitRHS = !EvalOK || (EvalOK && !EvalResult);
+     if (ShouldVisitRHS) {
+       Region = RHSRegion;
+       Visit(BO->getRHS());
+     }
+ 
+     Region = OldRegion;
+     Tree.merge(LHSRegion);
+     Tree.merge(RHSRegion);
+   }
+ 
+   void VisitBinLAnd(const BinaryOperator *BO) {
+     // C++11 [expr.log.and]p2:
+     //  If the second expression is evaluated, every value computation and
+     //  side effect associated with the first expression is sequenced before
+     //  every value computation and side effect associated with the
+     //  second expression.
+     SequenceTree::Seq LHSRegion = Tree.allocate(Region);
+     SequenceTree::Seq RHSRegion = Tree.allocate(Region);
+     SequenceTree::Seq OldRegion = Region;
+ 
+     EvaluationTracker Eval(*this);
+     {
+       SequencedSubexpression Sequenced(*this);
+       Region = LHSRegion;
+       Visit(BO->getLHS());
+     }
+ 
+     // C++11 [expr.log.and]p1:
+     //  [...] the second operand is not evaluated if the first operand is false.
+     bool EvalResult = false;
+     bool EvalOK = Eval.evaluate(BO->getLHS(), EvalResult);
+     bool ShouldVisitRHS = !EvalOK || (EvalOK && EvalResult);
+     if (ShouldVisitRHS) {
+       Region = RHSRegion;
+       Visit(BO->getRHS());
+     }
+ 
+     Region = OldRegion;
+     Tree.merge(LHSRegion);
+     Tree.merge(RHSRegion);
+   }
+ 
+   void VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO) {
+     // C++11 [expr.cond]p1:
+     //  [...] Every value computation and side effect associated with the first
+     //  expression is sequenced before every value computation and side effect
+     //  associated with the second or third expression.
+     SequenceTree::Seq ConditionRegion = Tree.allocate(Region);
+ 
+     // No sequencing is specified between the true and false expression.
+diff --git a/clang/p.patch b/clang/p.patch
+new file mode 100644
+index 000000000000..6607733bd157
+--- /dev/null
++++ b/clang/p.patch
+@@ -0,0 +1,26508 @@
++commit 7b09f244872bf04c0652460d09d15e57c807450f
++Author: Dávid Bolvanský <[e-mail]>
++Date:   Sun Sep 26 16:41:33 2021 +0200
++
++    [Clang] Extend -Wbool-operation to warn about bitwise and of bools with side effects
++    
++    Motivation: https://arstechnica.com/gadgets/2021/07/google-pushed-a-one-character-typo-to-production-bricking-chrome-os-devices/
++    
++    Warn for pattern boolA & boolB or boolA | boolB where boolA and boolB has possible side effects.
++    
++    Fixes https://bugs.llvm.org/show_bug.cgi?id=51216
++    
++    Differential Revision: https://reviews.llvm.org/D108003
++
++diff --git a/clang/include/clang/Basic/DiagnosticGroups.td b/clang/include/clang/Basic/DiagnosticGroups.td
++index f48598eec326..3fbcd77f4619 100644
++--- a/clang/include/clang/Basic/DiagnosticGroups.td
+++++ b/clang/include/clang/Basic/DiagnosticGroups.td
++@@ -1,1325 +1,1326 @@
++ //==--- DiagnosticGroups.td - Diagnostic Group Definitions ----------------===//
++ //
++ // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
++ // See https://llvm.org/LICENSE.txt for license information.
++ // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
++ //
++ //===----------------------------------------------------------------------===//
++ 
++ def ImplicitFunctionDeclare : DiagGroup<"implicit-function-declaration">;
++ def ImplicitInt : DiagGroup<"implicit-int">;
++ 
++ // Aggregation warning settings.
++ def Implicit : DiagGroup<"implicit", [
++     ImplicitFunctionDeclare,
++     ImplicitInt
++ ]>;
++ 
++ // Empty DiagGroups are recognized by clang but ignored.
++ def ODR : DiagGroup<"odr">;
++ def : DiagGroup<"abi">;
++ def AbsoluteValue : DiagGroup<"absolute-value">;
++ def MisspelledAssumption : DiagGroup<"misspelled-assumption">;
++ def UnknownAssumption : DiagGroup<"unknown-assumption">;
++ def AddressOfTemporary : DiagGroup<"address-of-temporary">;
++ def : DiagGroup<"aggregate-return">;
++ def GNUAlignofExpression : DiagGroup<"gnu-alignof-expression">;
++ def AmbigMemberTemplate : DiagGroup<"ambiguous-member-template">;
++ def GNUAnonymousStruct : DiagGroup<"gnu-anonymous-struct">;
++ def GNUAutoType : DiagGroup<"gnu-auto-type">;
++ def ArrayBounds : DiagGroup<"array-bounds">;
++ def ArrayBoundsPointerArithmetic : DiagGroup<"array-bounds-pointer-arithmetic">;
++ def AutoDisableVptrSanitizer : DiagGroup<"auto-disable-vptr-sanitizer">;
++ def Availability : DiagGroup<"availability">;
++ def Section : DiagGroup<"section">;
++ def AutoImport : DiagGroup<"auto-import">;
++ def FrameworkHdrQuotedInclude : DiagGroup<"quoted-include-in-framework-header">;
++ def FrameworkIncludePrivateFromPublic :
++   DiagGroup<"framework-include-private-from-public">;
++ def FrameworkHdrAtImport : DiagGroup<"atimport-in-framework-header">;
++ def CXX14BinaryLiteral : DiagGroup<"c++14-binary-literal">;
++ def CXXPre14CompatBinaryLiteral : DiagGroup<"c++98-c++11-compat-binary-literal">;
++ def GNUBinaryLiteral : DiagGroup<"gnu-binary-literal">;
++ def BinaryLiteral : DiagGroup<"binary-literal", [CXX14BinaryLiteral,
++                                                  CXXPre14CompatBinaryLiteral,
++                                                  GNUBinaryLiteral]>;
++ def GNUCompoundLiteralInitializer : DiagGroup<"gnu-compound-literal-initializer">;
++ def BitFieldConstantConversion : DiagGroup<"bitfield-constant-conversion">;
++ def BitFieldEnumConversion : DiagGroup<"bitfield-enum-conversion">;
++ def BitFieldWidth : DiagGroup<"bitfield-width">;
++ def CompoundTokenSplitByMacro : DiagGroup<"compound-token-split-by-macro">;
++ def CompoundTokenSplitBySpace : DiagGroup<"compound-token-split-by-space">;
++ def CompoundTokenSplit : DiagGroup<"compound-token-split",
++                                    [CompoundTokenSplitByMacro,
++                                     CompoundTokenSplitBySpace]>;
++ def CoroutineMissingUnhandledException :
++   DiagGroup<"coroutine-missing-unhandled-exception">;
++ def Coroutine : DiagGroup<"coroutine", [CoroutineMissingUnhandledException]>;
++ def ObjCBoolConstantConversion : DiagGroup<"objc-bool-constant-conversion">;
++ def ConstantConversion : DiagGroup<"constant-conversion",
++                                    [BitFieldConstantConversion,
++                                     ObjCBoolConstantConversion]>;
++ def LiteralConversion : DiagGroup<"literal-conversion">;
++ def StringConversion : DiagGroup<"string-conversion">;
++ def SignConversion : DiagGroup<"sign-conversion">;
++ def PointerBoolConversion : DiagGroup<"pointer-bool-conversion">;
++ def UndefinedBoolConversion : DiagGroup<"undefined-bool-conversion">;
++-def BoolOperation : DiagGroup<"bool-operation">;
+++def BitwiseInsteadOfLogical : DiagGroup<"bitwise-instead-of-logical">;
+++def BoolOperation : DiagGroup<"bool-operation", [BitwiseInsteadOfLogical]>;
++ def BoolConversion : DiagGroup<"bool-conversion", [PointerBoolConversion,
++                                                    UndefinedBoolConversion]>;
++ def IntConversion : DiagGroup<"int-conversion">;
++ def ClassConversion: DiagGroup<"class-conversion">;
++ def DeprecatedEnumCompareConditional :
++   DiagGroup<"deprecated-enum-compare-conditional">;
++ def EnumCompareConditional : DiagGroup<"enum-compare-conditional",
++                                        [DeprecatedEnumCompareConditional]>;
++ def EnumCompareSwitch : DiagGroup<"enum-compare-switch">;
++ def DeprecatedEnumCompare : DiagGroup<"deprecated-enum-compare">;
++ def EnumCompare : DiagGroup<"enum-compare", [EnumCompareSwitch,
++                                              DeprecatedEnumCompare]>;
++ def DeprecatedAnonEnumEnumConversion : DiagGroup<"deprecated-anon-enum-enum-conversion">;
++ def DeprecatedEnumEnumConversion : DiagGroup<"deprecated-enum-enum-conversion">;
++ def DeprecatedEnumFloatConversion : DiagGroup<"deprecated-enum-float-conversion">;
++ def AnonEnumEnumConversion : DiagGroup<"anon-enum-enum-conversion",
++                                    [DeprecatedAnonEnumEnumConversion]>;
++ def EnumEnumConversion : DiagGroup<"enum-enum-conversion",
++                                    [DeprecatedEnumEnumConversion]>;
++ def EnumFloatConversion : DiagGroup<"enum-float-conversion",
++                                     [DeprecatedEnumFloatConversion]>;
++ def EnumConversion : DiagGroup<"enum-conversion",
++                                [EnumEnumConversion,
++                                 EnumFloatConversion,
++                                 EnumCompareConditional]>;
++ def ObjCSignedCharBoolImplicitIntConversion :
++   DiagGroup<"objc-signed-char-bool-implicit-int-conversion">;
++ def ImplicitIntConversion : DiagGroup<"implicit-int-conversion",
++                                      [ObjCSignedCharBoolImplicitIntConversion]>;
++ def ImplicitConstIntFloatConversion : DiagGroup<"implicit-const-int-float-conversion">;
++ def ImplicitIntFloatConversion : DiagGroup<"implicit-int-float-conversion",
++  [ImplicitConstIntFloatConversion]>;
++ def ObjCSignedCharBoolImplicitFloatConversion :
++   DiagGroup<"objc-signed-char-bool-implicit-float-conversion">;
++ def ImplicitFloatConversion : DiagGroup<"implicit-float-conversion",
++   [ImplicitIntFloatConversion,
++    ObjCSignedCharBoolImplicitFloatConversion]>;
++ def ImplicitFixedPointConversion : DiagGroup<"implicit-fixed-point-conversion">;
++ 
++ def FloatOverflowConversion : DiagGroup<"float-overflow-conversion">;
++ def FloatZeroConversion : DiagGroup<"float-zero-conversion">;
++ def FloatConversion :
++   DiagGroup<"float-conversion", [FloatOverflowConversion,
++                                  FloatZeroConversion]>;
++ 
++ def FrameAddress : DiagGroup<"frame-address">;
++ def FreeNonHeapObject : DiagGroup<"free-nonheap-object">;
++ def DoublePromotion : DiagGroup<"double-promotion">;
++ def EnumTooLarge : DiagGroup<"enum-too-large">;
++ def UnsupportedNan : DiagGroup<"unsupported-nan">;
++ def UnsupportedAbs : DiagGroup<"unsupported-abs">;
++ def UnsupportedFPOpt : DiagGroup<"unsupported-floating-point-opt">;
++ def UnsupportedCB : DiagGroup<"unsupported-cb">;
++ def UnsupportedGPOpt : DiagGroup<"unsupported-gpopt">;
++ def UnsupportedTargetOpt : DiagGroup<"unsupported-target-opt">;
++ def NonLiteralNullConversion : DiagGroup<"non-literal-null-conversion">;
++ def NullConversion : DiagGroup<"null-conversion">;
++ def ImplicitConversionFloatingPointToBool :
++   DiagGroup<"implicit-conversion-floating-point-to-bool">;
++ def ObjCLiteralConversion : DiagGroup<"objc-literal-conversion">;
++ def MacroRedefined : DiagGroup<"macro-redefined">;
++ def BuiltinMacroRedefined : DiagGroup<"builtin-macro-redefined">;
++ def BuiltinRequiresHeader : DiagGroup<"builtin-requires-header">;
++ def C99Compat : DiagGroup<"c99-compat">;
++ def CXXCompat: DiagGroup<"c++-compat">;
++ def ExternCCompat : DiagGroup<"extern-c-compat">;
++ def KeywordCompat : DiagGroup<"keyword-compat">;
++ def GNUCaseRange : DiagGroup<"gnu-case-range">;
++ def CastAlign : DiagGroup<"cast-align">;
++ def CastQual : DiagGroup<"cast-qual">;
++ def : DiagGroup<"char-align">;
++ def Comment : DiagGroup<"comment">;
++ def GNUComplexInteger : DiagGroup<"gnu-complex-integer">;
++ def GNUConditionalOmittedOperand : DiagGroup<"gnu-conditional-omitted-operand">;
++ def ConfigMacros : DiagGroup<"config-macros">;
++ def : DiagGroup<"ctor-dtor-privacy">;
++ def GNUStringLiteralOperatorTemplate :
++   DiagGroup<"gnu-string-literal-operator-template">;
++ def UndefinedVarTemplate : DiagGroup<"undefined-var-template">;
++ def UndefinedFuncTemplate : DiagGroup<"undefined-func-template">;
++ def MissingNoEscape : DiagGroup<"missing-noescape">;
++ 
++ def DefaultedFunctionDeleted : DiagGroup<"defaulted-function-deleted">;
++ def DeleteIncomplete : DiagGroup<"delete-incomplete">;
++ def DeleteNonAbstractNonVirtualDtor : DiagGroup<"delete-non-abstract-non-virtual-dtor">;
++ def DeleteAbstractNonVirtualDtor : DiagGroup<"delete-abstract-non-virtual-dtor">;
++ def DeleteNonVirtualDtor : DiagGroup<"delete-non-virtual-dtor",
++                                      [DeleteNonAbstractNonVirtualDtor,
++                                       DeleteAbstractNonVirtualDtor]>;
++ def AbstractFinalClass : DiagGroup<"abstract-final-class">;
++ def FinalDtorNonFinalClass : DiagGroup<"final-dtor-non-final-class">;
++ 
++ def CXX11CompatDeprecatedWritableStr :
++   DiagGroup<"c++11-compat-deprecated-writable-strings">;
++ 
++ def DeprecatedArrayCompare : DiagGroup<"deprecated-array-compare">;
++ def DeprecatedAttributes : DiagGroup<"deprecated-attributes">;
++ def DeprecatedCommaSubscript : DiagGroup<"deprecated-comma-subscript">;
++ def DeprecatedCopyWithUserProvidedCopy : DiagGroup<"deprecated-copy-with-user-provided-copy">;
++ def DeprecatedCopyWithUserProvidedDtor : DiagGroup<"deprecated-copy-with-user-provided-dtor">;
++ def DeprecatedCopy : DiagGroup<"deprecated-copy", [DeprecatedCopyWithUserProvidedCopy]>;
++ def DeprecatedCopyWithDtor : DiagGroup<"deprecated-copy-with-dtor", [DeprecatedCopyWithUserProvidedDtor]>;
++ // For compatibility with GCC.
++ def : DiagGroup<"deprecated-copy-dtor", [DeprecatedCopyWithDtor]>;
++ def DeprecatedDeclarations : DiagGroup<"deprecated-declarations">;
++ def UnavailableDeclarations : DiagGroup<"unavailable-declarations">;
++ def UnguardedAvailabilityNew : DiagGroup<"unguarded-availability-new">;
++ def UnguardedAvailability : DiagGroup<"unguarded-availability",
++                                       [UnguardedAvailabilityNew]>;
++ // partial-availability is an alias of unguarded-availability.
++ def : DiagGroup<"partial-availability", [UnguardedAvailability]>;
++ def DeprecatedDynamicExceptionSpec
++     : DiagGroup<"deprecated-dynamic-exception-spec">;
++ def DeprecatedImplementations :DiagGroup<"deprecated-implementations">;
++ def DeprecatedIncrementBool : DiagGroup<"deprecated-increment-bool">;
++ def DeprecatedRegister : DiagGroup<"deprecated-register">;
++ def DeprecatedThisCapture : DiagGroup<"deprecated-this-capture">;
++ def DeprecatedVolatile : DiagGroup<"deprecated-volatile">;
++ def DeprecatedWritableStr : DiagGroup<"deprecated-writable-strings",
++                                       [CXX11CompatDeprecatedWritableStr]>;
++ def DeprecatedPragma : DiagGroup<"deprecated-pragma">;
++ // FIXME: Why is DeprecatedImplementations not in this group?
++ def Deprecated : DiagGroup<"deprecated", [DeprecatedAnonEnumEnumConversion,
++                                           DeprecatedArrayCompare,
++                                           DeprecatedAttributes,
++                                           DeprecatedCommaSubscript,
++                                           DeprecatedCopy,
++                                           DeprecatedCopyWithDtor,
++                                           DeprecatedDeclarations,
++                                           DeprecatedDynamicExceptionSpec,
++                                           DeprecatedEnumCompare,
++                                           DeprecatedEnumCompareConditional,
++                                           DeprecatedEnumEnumConversion,
++                                           DeprecatedEnumFloatConversion,
++                                           DeprecatedIncrementBool,
++                                           DeprecatedPragma,
++                                           DeprecatedRegister,
++                                           DeprecatedThisCapture,
++                                           DeprecatedVolatile,
++                                           DeprecatedWritableStr]>,
++                  DiagCategory<"Deprecations">;
++ 
++ def CXX20Designator : DiagGroup<"c++20-designator">;
++ // Allow -Wno-c99-designator to be used to turn off all warnings on valid C99
++ // designators (including the warning controlled by -Wc++20-designator).
++ def C99Designator : DiagGroup<"c99-designator", [CXX20Designator]>;
++ def GNUDesignator : DiagGroup<"gnu-designator">;
++ def DtorName : DiagGroup<"dtor-name">;
++ 
++ def DynamicExceptionSpec
++     : DiagGroup<"dynamic-exception-spec", [DeprecatedDynamicExceptionSpec]>;
++ 
++ def LibLTO : DiagGroup<"liblto">;
++ def : DiagGroup<"disabled-optimization">;
++ def : DiagGroup<"discard-qual">;
++ def DivZero : DiagGroup<"division-by-zero">;
++ def : DiagGroup<"div-by-zero", [DivZero]>;
++ 
++ def DocumentationHTML : DiagGroup<"documentation-html">;
++ def DocumentationUnknownCommand : DiagGroup<"documentation-unknown-command">;
++ def DocumentationPedantic : DiagGroup<"documentation-pedantic",
++                                       [DocumentationUnknownCommand]>;
++ def DocumentationDeprecatedSync : DiagGroup<"documentation-deprecated-sync">;
++ def Documentation : DiagGroup<"documentation",
++                               [DocumentationHTML,
++                                DocumentationDeprecatedSync]>;
++ 
++ def EmptyBody : DiagGroup<"empty-body">;
++ def Exceptions : DiagGroup<"exceptions">;
++ 
++ def GNUEmptyInitializer : DiagGroup<"gnu-empty-initializer">;
++ def GNUEmptyStruct : DiagGroup<"gnu-empty-struct">;
++ def ExtraTokens : DiagGroup<"extra-tokens">;
++ def CXX98CompatExtraSemi : DiagGroup<"c++98-compat-extra-semi">;
++ def CXX11ExtraSemi : DiagGroup<"c++11-extra-semi">;
++ def EmptyInitStatement : DiagGroup<"empty-init-stmt">;
++ def ExportUnnamed : DiagGroup<"export-unnamed">;
++ def ExtraSemiStmt : DiagGroup<"extra-semi-stmt", [EmptyInitStatement]>;
++ def ExtraSemi : DiagGroup<"extra-semi", [CXX98CompatExtraSemi,
++                                          CXX11ExtraSemi]>;
++ 
++ def GNUFlexibleArrayInitializer : DiagGroup<"gnu-flexible-array-initializer">;
++ def GNUFlexibleArrayUnionMember : DiagGroup<"gnu-flexible-array-union-member">;
++ def GNUFoldingConstant : DiagGroup<"gnu-folding-constant">;
++ def FormatInsufficientArgs : DiagGroup<"format-insufficient-args">;
++ def FormatExtraArgs : DiagGroup<"format-extra-args">;
++ def FormatZeroLength : DiagGroup<"format-zero-length">;
++ 
++ def InvalidIOSDeploymentTarget : DiagGroup<"invalid-ios-deployment-target">;
++ 
++ def CXX17CompatMangling : DiagGroup<"c++17-compat-mangling">;
++ def : DiagGroup<"c++1z-compat-mangling", [CXX17CompatMangling]>;
++ // Name of this warning in GCC.
++ def NoexceptType : DiagGroup<"noexcept-type", [CXX17CompatMangling]>;
++ 
++ // Warnings for C code which is not compatible with previous C standards.
++ def CPre2xCompat : DiagGroup<"pre-c2x-compat">;
++ def CPre2xCompatPedantic : DiagGroup<"pre-c2x-compat-pedantic",
++                                      [CPre2xCompat]>;
++ 
++ // Warnings for C++ code which is not compatible with previous C++ standards.
++ def CXXPre14Compat : DiagGroup<"pre-c++14-compat">;
++ def : DiagGroup<"c++98-c++11-compat", [CXXPre14Compat]>;
++ def CXXPre14CompatPedantic : DiagGroup<"pre-c++14-compat-pedantic",
++                                        [CXXPre14Compat,
++                                         CXXPre14CompatBinaryLiteral]>;
++ def : DiagGroup<"c++98-c++11-compat-pedantic", [CXXPre14CompatPedantic]>;
++ def CXXPre17Compat : DiagGroup<"pre-c++17-compat">;
++ def : DiagGroup<"c++98-c++11-c++14-compat", [CXXPre17Compat]>;
++ def CXXPre17CompatPedantic : DiagGroup<"pre-c++17-compat-pedantic",
++                                        [CXXPre17Compat]>;
++ def : DiagGroup<"c++98-c++11-c++14-compat-pedantic",
++                 [CXXPre17CompatPedantic]>;
++ def CXXPre20Compat : DiagGroup<"pre-c++20-compat">;
++ def : DiagGroup<"c++98-c++11-c++14-c++17-compat", [CXXPre20Compat]>;
++ def CXXPre20CompatPedantic : DiagGroup<"pre-c++20-compat-pedantic",
++                                        [CXXPre20Compat]>;
++ def : DiagGroup<"c++98-c++11-c++14-c++17-compat-pedantic",
++                 [CXXPre20CompatPedantic]>;
++ def CXXPre2bCompat : DiagGroup<"pre-c++2b-compat">;
++ def CXXPre2bCompatPedantic :
++   DiagGroup<"pre-c++2b-compat-pedantic", [CXXPre2bCompat]>;
++ 
++ def CXX98CompatBindToTemporaryCopy :
++   DiagGroup<"c++98-compat-bind-to-temporary-copy">;
++ def CXX98CompatLocalTypeTemplateArgs :
++   DiagGroup<"c++98-compat-local-type-template-args">;
++ def CXX98CompatUnnamedTypeTemplateArgs :
++   DiagGroup<"c++98-compat-unnamed-type-template-args">;
++ 
++ def CXX98Compat : DiagGroup<"c++98-compat",
++                             [CXX98CompatLocalTypeTemplateArgs,
++                              CXX98CompatUnnamedTypeTemplateArgs,
++                              CXXPre14Compat,
++                              CXXPre17Compat,
++                              CXXPre20Compat,
++                              CXXPre2bCompat]>;
++ // Warnings for C++11 features which are Extensions in C++98 mode.
++ def CXX98CompatPedantic : DiagGroup<"c++98-compat-pedantic",
++                                     [CXX98Compat,
++                                      CXX98CompatBindToTemporaryCopy,
++                                      CXX98CompatExtraSemi,
++                                      CXXPre14CompatPedantic,
++                                      CXXPre17CompatPedantic,
++                                      CXXPre20CompatPedantic,
++                                      CXXPre2bCompatPedantic]>;
++ 
++ def CXX11Narrowing : DiagGroup<"c++11-narrowing">;
++ 
++ def CXX11WarnInconsistentOverrideDestructor :
++   DiagGroup<"inconsistent-missing-destructor-override">;
++ def CXX11WarnInconsistentOverrideMethod :
++   DiagGroup<"inconsistent-missing-override">;
++ def CXX11WarnSuggestOverrideDestructor : DiagGroup<"suggest-destructor-override">;
++ def CXX11WarnSuggestOverride : DiagGroup<"suggest-override">;
++ 
++ // Original name of this warning in Clang
++ def : DiagGroup<"c++0x-narrowing", [CXX11Narrowing]>;
++ 
++ // Name of this warning in GCC
++ def : DiagGroup<"narrowing", [CXX11Narrowing]>;
++ 
++ def CXX11CompatReservedUserDefinedLiteral :
++   DiagGroup<"c++11-compat-reserved-user-defined-literal">;
++ def ReservedUserDefinedLiteral :
++   DiagGroup<"reserved-user-defined-literal",
++             [CXX11CompatReservedUserDefinedLiteral]>;
++ 
++ def CXX11Compat : DiagGroup<"c++11-compat",
++                             [CXX11Narrowing,
++                              CXX11CompatReservedUserDefinedLiteral,
++                              CXX11CompatDeprecatedWritableStr,
++                              CXXPre14Compat,
++                              CXXPre17Compat,
++                              CXXPre20Compat,
++                              CXXPre2bCompat]>;
++ def : DiagGroup<"c++0x-compat", [CXX11Compat]>;
++ def CXX11CompatPedantic : DiagGroup<"c++11-compat-pedantic",
++                                     [CXX11Compat,
++                                      CXXPre14CompatPedantic,
++                                      CXXPre17CompatPedantic,
++                                      CXXPre20CompatPedantic,
++                                      CXXPre2bCompatPedantic]>;
++ 
++ def CXX14Compat : DiagGroup<"c++14-compat", [CXXPre17Compat,
++                                              CXXPre20Compat,
++                                              CXXPre2bCompat]>;
++ def CXX14CompatPedantic : DiagGroup<"c++14-compat-pedantic",
++                                     [CXX14Compat,
++                                      CXXPre17CompatPedantic,
++                                      CXXPre20CompatPedantic,
++                                      CXXPre2bCompatPedantic]>;
++ 
++ def CXX17Compat : DiagGroup<"c++17-compat", [DeprecatedRegister,
++                                              DeprecatedIncrementBool,
++                                              CXX17CompatMangling,
++                                              CXXPre20Compat,
++                                              CXXPre2bCompat]>;
++ def CXX17CompatPedantic : DiagGroup<"c++17-compat-pedantic",
++                                     [CXX17Compat,
++                                      CXXPre20CompatPedantic,
++                                      CXXPre2bCompatPedantic]>;
++ def : DiagGroup<"c++1z-compat", [CXX17Compat]>;
++ 
++ def CXX20Compat : DiagGroup<"c++20-compat", [CXXPre2bCompat]>;
++ def CXX20CompatPedantic : DiagGroup<"c++20-compat-pedantic",
++                                     [CXX20Compat,
++                                      CXXPre2bCompatPedantic]>;
++ def : DiagGroup<"c++2a-compat", [CXX20Compat]>;
++ def : DiagGroup<"c++2a-compat-pedantic", [CXX20CompatPedantic]>;
++ 
++ def ExitTimeDestructors : DiagGroup<"exit-time-destructors">;
++ def FlexibleArrayExtensions : DiagGroup<"flexible-array-extensions">;
++ def FourByteMultiChar : DiagGroup<"four-char-constants">;
++ def GlobalConstructors : DiagGroup<"global-constructors">;
++ def BitwiseConditionalParentheses: DiagGroup<"bitwise-conditional-parentheses">;
++ def BitwiseOpParentheses: DiagGroup<"bitwise-op-parentheses">;
++ def LogicalOpParentheses: DiagGroup<"logical-op-parentheses">;
++ def LogicalNotParentheses: DiagGroup<"logical-not-parentheses">;
++ def ShiftOpParentheses: DiagGroup<"shift-op-parentheses">;
++ def OverloadedShiftOpParentheses: DiagGroup<"overloaded-shift-op-parentheses">;
++ def DanglingElse: DiagGroup<"dangling-else">;
++ def DanglingField : DiagGroup<"dangling-field">;
++ def DanglingInitializerList : DiagGroup<"dangling-initializer-list">;
++ def DanglingGsl : DiagGroup<"dangling-gsl">;
++ def ReturnStackAddress : DiagGroup<"return-stack-address">;
++ def Dangling : DiagGroup<"dangling", [DanglingField,
++                                       DanglingInitializerList,
++                                       DanglingGsl,
++                                       ReturnStackAddress]>;
++ def DistributedObjectModifiers : DiagGroup<"distributed-object-modifiers">;
++ def ExcessInitializers : DiagGroup<"excess-initializers">;
++ def ExpansionToDefined : DiagGroup<"expansion-to-defined">;
++ def FlagEnum : DiagGroup<"flag-enum">;
++ def IncrementBool : DiagGroup<"increment-bool", [DeprecatedIncrementBool]>;
++ def InfiniteRecursion : DiagGroup<"infinite-recursion">;
++ def PureVirtualCallFromCtorDtor: DiagGroup<"call-to-pure-virtual-from-ctor-dtor">;
++ def GNUImaginaryConstant : DiagGroup<"gnu-imaginary-constant">;
++ def IgnoredReferenceQualifiers : DiagGroup<"ignored-reference-qualifiers">;
++ def IgnoredQualifiers : DiagGroup<"ignored-qualifiers", [IgnoredReferenceQualifiers]>;
++ def : DiagGroup<"import">;
++ def GNUIncludeNext : DiagGroup<"gnu-include-next">;
++ def IncompatibleMSStruct : DiagGroup<"incompatible-ms-struct">;
++ def IncompatiblePointerTypesDiscardsQualifiers
++   : DiagGroup<"incompatible-pointer-types-discards-qualifiers">;
++ def IncompatibleFunctionPointerTypes
++   : DiagGroup<"incompatible-function-pointer-types">;
++ def IncompatiblePointerTypes
++   : DiagGroup<"incompatible-pointer-types",
++     [IncompatiblePointerTypesDiscardsQualifiers,
++      IncompatibleFunctionPointerTypes]>;
++ def IncompleteUmbrella : DiagGroup<"incomplete-umbrella">;
++ def IncompleteFrameworkModuleDeclaration
++   : DiagGroup<"incomplete-framework-module-declaration">;
++ def NonModularIncludeInFrameworkModule
++   : DiagGroup<"non-modular-include-in-framework-module">;
++ def NonModularIncludeInModule : DiagGroup<"non-modular-include-in-module",
++                                           [NonModularIncludeInFrameworkModule]>;
++ def IncompleteModule : DiagGroup<"incomplete-module",
++     [IncompleteUmbrella, NonModularIncludeInModule]>;
++ def PrivateModule : DiagGroup<"private-module">;
++ 
++ def CXX11InlineNamespace : DiagGroup<"c++11-inline-namespace">;
++ def InlineNamespaceReopenedNoninline
++     : DiagGroup<"inline-namespace-reopened-noninline">;
++ def InvalidNoreturn : DiagGroup<"invalid-noreturn">;
++ def InvalidSourceEncoding : DiagGroup<"invalid-source-encoding">;
++ def KNRPromotedParameter : DiagGroup<"knr-promoted-parameter">;
++ def : DiagGroup<"init-self">;
++ def : DiagGroup<"inline">;
++ def : DiagGroup<"invalid-pch">;
++ def GNULabelsAsValue : DiagGroup<"gnu-label-as-value">;
++ def LiteralRange : DiagGroup<"literal-range">;
++ def LocalTypeTemplateArgs : DiagGroup<"local-type-template-args",
++                                       [CXX98CompatLocalTypeTemplateArgs]>;
++ def RangeLoopConstruct : DiagGroup<"range-loop-construct">;
++ def RangeLoopBindReference : DiagGroup<"range-loop-bind-reference">;
++ def RangeLoopAnalysis : DiagGroup<"range-loop-analysis",
++                                   [RangeLoopConstruct, RangeLoopBindReference]>;
++ def ForLoopAnalysis : DiagGroup<"for-loop-analysis">;
++ def LoopAnalysis : DiagGroup<"loop-analysis", [ForLoopAnalysis,
++                                                RangeLoopAnalysis]>;
++ def MalformedWarningCheck : DiagGroup<"malformed-warning-check">;
++ def Main : DiagGroup<"main">;
++ def MainReturnType : DiagGroup<"main-return-type">;
++ def MaxUnsignedZero : DiagGroup<"max-unsigned-zero">;
++ def MissingBraces : DiagGroup<"missing-braces">;
++ def MissingDeclarations: DiagGroup<"missing-declarations">;
++ def : DiagGroup<"missing-format-attribute">;
++ def : DiagGroup<"missing-include-dirs">;
++ def MissingNoreturn : DiagGroup<"missing-noreturn">;
++ def MultiChar : DiagGroup<"multichar">;
++ def : DiagGroup<"nested-externs">;
++ def CXX11LongLong : DiagGroup<"c++11-long-long">;
++ def LongLong : DiagGroup<"long-long", [CXX11LongLong]>;
++ def ImplicitlyUnsignedLiteral : DiagGroup<"implicitly-unsigned-literal">;
++ def MethodSignatures : DiagGroup<"method-signatures">;
++ def MismatchedParameterTypes : DiagGroup<"mismatched-parameter-types">;
++ def MismatchedReturnTypes : DiagGroup<"mismatched-return-types">;
++ def MismatchedTags : DiagGroup<"mismatched-tags">;
++ def MissingFieldInitializers : DiagGroup<"missing-field-initializers">;
++ def ModuleLock : DiagGroup<"module-lock">;
++ def ModuleBuild : DiagGroup<"module-build">;
++ def ModuleImport : DiagGroup<"module-import">;
++ def ModuleConflict : DiagGroup<"module-conflict">;
++ def ModuleFileExtension : DiagGroup<"module-file-extension">;
++ def RoundTripCC1Args : DiagGroup<"round-trip-cc1-args">;
++ def NewlineEOF : DiagGroup<"newline-eof">;
++ def Nullability : DiagGroup<"nullability">;
++ def NullabilityDeclSpec : DiagGroup<"nullability-declspec">;
++ def NullabilityInferredOnNestedType : DiagGroup<"nullability-inferred-on-nested-type">;
++ def NullableToNonNullConversion : DiagGroup<"nullable-to-nonnull-conversion">;
++ def NullabilityCompletenessOnArrays : DiagGroup<"nullability-completeness-on-arrays">;
++ def NullabilityCompleteness : DiagGroup<"nullability-completeness",
++                                         [NullabilityCompletenessOnArrays]>;
++ def NullArithmetic : DiagGroup<"null-arithmetic">;
++ def NullCharacter : DiagGroup<"null-character">;
++ def NullDereference : DiagGroup<"null-dereference">;
++ def InitializerOverrides : DiagGroup<"initializer-overrides">;
++ // For compatibility with GCC; -Woverride-init = -Winitializer-overrides
++ def : DiagGroup<"override-init", [InitializerOverrides]>;
++ def NonNull : DiagGroup<"nonnull">;
++ def NonPODVarargs : DiagGroup<"non-pod-varargs">;
++ def ClassVarargs : DiagGroup<"class-varargs", [NonPODVarargs]>;
++ def : DiagGroup<"nonportable-cfstrings">;
++ def NonVirtualDtor : DiagGroup<"non-virtual-dtor">;
++ def NullPointerArithmetic : DiagGroup<"null-pointer-arithmetic">;
++ def NullPointerSubtraction : DiagGroup<"null-pointer-subtraction">;
++ def : DiagGroup<"effc++", [NonVirtualDtor]>;
++ def OveralignedType : DiagGroup<"over-aligned">;
++ def OldStyleCast : DiagGroup<"old-style-cast">;
++ def : DiagGroup<"old-style-definition">;
++ def OutOfLineDeclaration : DiagGroup<"out-of-line-declaration">;
++ def : DiagGroup<"overflow">;
++ def ForwardClassReceiver : DiagGroup<"receiver-forward-class">;
++ def MethodAccess : DiagGroup<"objc-method-access">;
++ def ObjCReceiver : DiagGroup<"receiver-expr">;
++ def OperatorNewReturnsNull : DiagGroup<"new-returns-null">;
++ def OverlengthStrings : DiagGroup<"overlength-strings">;
++ def OverloadedVirtual : DiagGroup<"overloaded-virtual">;
++ def PrivateExtern : DiagGroup<"private-extern">;
++ def SelTypeCast : DiagGroup<"cast-of-sel-type">;
++ def FunctionDefInObjCContainer : DiagGroup<"function-def-in-objc-container">;
++ def BadFunctionCast : DiagGroup<"bad-function-cast">;
++ def CastFunctionType : DiagGroup<"cast-function-type">;
++ def ObjCPropertyImpl : DiagGroup<"objc-property-implementation">;
++ def ObjCPropertyNoAttribute : DiagGroup<"objc-property-no-attribute">;
++ def ObjCPropertyAssignOnObjectType : DiagGroup<"objc-property-assign-on-object-type">;
++ def ObjCProtocolQualifiers : DiagGroup<"objc-protocol-qualifiers">;
++ def ObjCMissingSuperCalls : DiagGroup<"objc-missing-super-calls">;
++ def ObjCDesignatedInit : DiagGroup<"objc-designated-initializers">;
++ def ObjCRetainBlockProperty : DiagGroup<"objc-noncopy-retain-block-property">;
++ def ObjCReadonlyPropertyHasSetter : DiagGroup<"objc-readonly-with-setter-property">;
++ def ObjCInvalidIBOutletProperty : DiagGroup<"invalid-iboutlet">;
++ def ObjCRootClass : DiagGroup<"objc-root-class">;
++ def ObjCPointerIntrospectPerformSelector : DiagGroup<"deprecated-objc-pointer-introspection-performSelector">;
++ def ObjCPointerIntrospect : DiagGroup<"deprecated-objc-pointer-introspection", [ObjCPointerIntrospectPerformSelector]>;
++ def ObjCMultipleMethodNames : DiagGroup<"objc-multiple-method-names">;
++ def ObjCFlexibleArray : DiagGroup<"objc-flexible-array">;
++ def ObjCBoxing : DiagGroup<"objc-boxing">;
++ def CompletionHandler : DiagGroup<"completion-handler">;
++ def CalledOnceParameter : DiagGroup<"called-once-parameter", [CompletionHandler]>;
++ def OpenCLUnsupportedRGBA: DiagGroup<"opencl-unsupported-rgba">;
++ def UnderalignedExceptionObject : DiagGroup<"underaligned-exception-object">;
++ def DeprecatedObjCIsaUsage : DiagGroup<"deprecated-objc-isa-usage">;
++ def ExplicitInitializeCall : DiagGroup<"explicit-initialize-call">;
++ def OrderedCompareFunctionPointers : DiagGroup<"ordered-compare-function-pointers">;
++ def Packed : DiagGroup<"packed">;
++ def Padded : DiagGroup<"padded">;
++ 
++ def PessimizingMove : DiagGroup<"pessimizing-move">;
++ def ReturnStdMove : DiagGroup<"return-std-move">;
++ 
++ def PointerArith : DiagGroup<"pointer-arith">;
++ def PoundWarning : DiagGroup<"#warnings">;
++ def PoundPragmaMessage : DiagGroup<"#pragma-messages">,
++                          DiagCategory<"#pragma message Directive">;
++ def : DiagGroup<"redundant-decls">;
++ def RedeclaredClassMember : DiagGroup<"redeclared-class-member">;
++ def GNURedeclaredEnum : DiagGroup<"gnu-redeclared-enum">;
++ def RedundantMove : DiagGroup<"redundant-move">;
++ def Register : DiagGroup<"register", [DeprecatedRegister]>;
++ def ReturnTypeCLinkage : DiagGroup<"return-type-c-linkage">;
++ def ReturnType : DiagGroup<"return-type", [ReturnTypeCLinkage]>;
++ def BindToTemporaryCopy : DiagGroup<"bind-to-temporary-copy",
++                                     [CXX98CompatBindToTemporaryCopy]>;
++ def SelfAssignmentField : DiagGroup<"self-assign-field">;
++ def SelfAssignmentOverloaded : DiagGroup<"self-assign-overloaded">;
++ def SelfAssignment : DiagGroup<"self-assign", [SelfAssignmentOverloaded, SelfAssignmentField]>;
++ def SelfMove : DiagGroup<"self-move">;
++ def SemiBeforeMethodBody : DiagGroup<"semicolon-before-method-body">;
++ def Sentinel : DiagGroup<"sentinel">;
++ def MissingMethodReturnType : DiagGroup<"missing-method-return-type">;
++ 
++ def ShadowField : DiagGroup<"shadow-field">;
++ def ShadowFieldInConstructorModified : DiagGroup<"shadow-field-in-constructor-modified">;
++ def ShadowFieldInConstructor : DiagGroup<"shadow-field-in-constructor",
++                                          [ShadowFieldInConstructorModified]>;
++ def ShadowIvar : DiagGroup<"shadow-ivar">;
++ def ShadowUncapturedLocal : DiagGroup<"shadow-uncaptured-local">;
++ 
++ // -Wshadow-all is a catch-all for all shadowing. -Wshadow is just the
++ // shadowing that we think is unsafe.
++ def Shadow : DiagGroup<"shadow", [ShadowFieldInConstructorModified,
++                                   ShadowIvar]>;
++ def ShadowAll : DiagGroup<"shadow-all", [Shadow, ShadowFieldInConstructor,
++                                          ShadowUncapturedLocal, ShadowField]>;
++ 
++ def Shorten64To32 : DiagGroup<"shorten-64-to-32">;
++ def : DiagGroup<"sign-promo">;
++ def SignCompare : DiagGroup<"sign-compare">;
++ def : DiagGroup<"switch-default">;
++ def : DiagGroup<"synth">;
++ def SizeofArrayArgument : DiagGroup<"sizeof-array-argument">;
++ def SizeofArrayDecay : DiagGroup<"sizeof-array-decay">;
++ def SizeofPointerMemaccess : DiagGroup<"sizeof-pointer-memaccess">;
++ def MemsetTransposedArgs : DiagGroup<"memset-transposed-args">;
++ def DynamicClassMemaccess : DiagGroup<"dynamic-class-memaccess">;
++ def NonTrivialMemaccess : DiagGroup<"nontrivial-memaccess">;
++ def SuspiciousBzero : DiagGroup<"suspicious-bzero">;
++ def SuspiciousMemaccess : DiagGroup<"suspicious-memaccess",
++   [SizeofPointerMemaccess, DynamicClassMemaccess,
++    NonTrivialMemaccess, MemsetTransposedArgs, SuspiciousBzero]>;
++ def StaticInInline : DiagGroup<"static-in-inline">;
++ def StaticLocalInInline : DiagGroup<"static-local-in-inline">;
++ def GNUStaticFloatInit : DiagGroup<"gnu-static-float-init">;
++ def StaticFloatInit : DiagGroup<"static-float-init", [GNUStaticFloatInit]>;
++ def GNUStatementExpression : DiagGroup<"gnu-statement-expression">;
++ def StringConcatation : DiagGroup<"string-concatenation">;
++ def StringCompare : DiagGroup<"string-compare">;
++ def StringPlusInt : DiagGroup<"string-plus-int">;
++ def StringPlusChar : DiagGroup<"string-plus-char">;
++ def StrncatSize : DiagGroup<"strncat-size">;
++ def SwiftNameAttribute : DiagGroup<"swift-name-attribute">;
++ def IntInBoolContext : DiagGroup<"int-in-bool-context">;
++ def TautologicalTypeLimitCompare : DiagGroup<"tautological-type-limit-compare">;
++ def TautologicalUnsignedZeroCompare : DiagGroup<"tautological-unsigned-zero-compare">;
++ def TautologicalUnsignedCharZeroCompare : DiagGroup<"tautological-unsigned-char-zero-compare">;
++ def TautologicalUnsignedEnumZeroCompare : DiagGroup<"tautological-unsigned-enum-zero-compare">;
++ // For compatibility with GCC. Tautological comparison warnings for constants
++ // that are an extremal value of the type.
++ def TypeLimits : DiagGroup<"type-limits", [TautologicalTypeLimitCompare,
++                                            TautologicalUnsignedZeroCompare,
++                                            TautologicalUnsignedCharZeroCompare,
++                                            TautologicalUnsignedEnumZeroCompare]>;
++ // Additional tautological comparison warnings based on the expression, not
++ // only on its type.
++ def TautologicalValueRangeCompare : DiagGroup<"tautological-value-range-compare">;
++ def TautologicalInRangeCompare : DiagGroup<"tautological-constant-in-range-compare",
++                                            [TypeLimits, TautologicalValueRangeCompare]>;
++ def TautologicalOutOfRangeCompare : DiagGroup<"tautological-constant-out-of-range-compare">;
++ def TautologicalConstantCompare : DiagGroup<"tautological-constant-compare",
++                                             [TautologicalOutOfRangeCompare]>;
++ def TautologicalPointerCompare : DiagGroup<"tautological-pointer-compare">;
++ def TautologicalOverlapCompare : DiagGroup<"tautological-overlap-compare">;
++ def TautologicalBitwiseCompare : DiagGroup<"tautological-bitwise-compare">;
++ def TautologicalUndefinedCompare : DiagGroup<"tautological-undefined-compare">;
++ def TautologicalObjCBoolCompare : DiagGroup<"tautological-objc-bool-compare">;
++ def TautologicalCompare : DiagGroup<"tautological-compare",
++                                     [TautologicalConstantCompare,
++                                      TautologicalPointerCompare,
++                                      TautologicalOverlapCompare,
++                                      TautologicalBitwiseCompare,
++                                      TautologicalUndefinedCompare,
++                                      TautologicalObjCBoolCompare]>;
++ def HeaderHygiene : DiagGroup<"header-hygiene">;
++ def DuplicateDeclSpecifier : DiagGroup<"duplicate-decl-specifier">;
++ def CompareDistinctPointerType : DiagGroup<"compare-distinct-pointer-types">;
++ def GNUUnionCast : DiagGroup<"gnu-union-cast">;
++ def GNUVariableSizedTypeNotAtEnd : DiagGroup<"gnu-variable-sized-type-not-at-end">;
++ def Varargs : DiagGroup<"varargs">;
++ def XorUsedAsPow : DiagGroup<"xor-used-as-pow">;
++ 
++ def Unsequenced : DiagGroup<"unsequenced">;
++ // GCC name for -Wunsequenced
++ def : DiagGroup<"sequence-point", [Unsequenced]>;
++ 
++ // Preprocessor warnings.
++ def AmbiguousMacro : DiagGroup<"ambiguous-macro">;
++ def KeywordAsMacro : DiagGroup<"keyword-macro">;
++ def ReservedIdAsMacro : DiagGroup<"reserved-macro-identifier">;
++ def ReservedIdAsMacroAlias : DiagGroup<"reserved-id-macro", [ReservedIdAsMacro]>;
++ def RestrictExpansionMacro : DiagGroup<"restrict-expansion">;
++ 
++ // Just silence warnings about -Wstrict-aliasing for now.
++ def : DiagGroup<"strict-aliasing=0">;
++ def : DiagGroup<"strict-aliasing=1">;
++ def : DiagGroup<"strict-aliasing=2">;
++ def : DiagGroup<"strict-aliasing">;
++ 
++ // Just silence warnings about -Wstrict-overflow for now.
++ def : DiagGroup<"strict-overflow=0">;
++ def : DiagGroup<"strict-overflow=1">;
++ def : DiagGroup<"strict-overflow=2">;
++ def : DiagGroup<"strict-overflow=3">;
++ def : DiagGroup<"strict-overflow=4">;
++ def : DiagGroup<"strict-overflow=5">;
++ def : DiagGroup<"strict-overflow">;
++ 
++ def InvalidOffsetof : DiagGroup<"invalid-offsetof">;
++ def StrictSelector : DiagGroup<"strict-selector-match">;
++ def MethodDuplicate : DiagGroup<"duplicate-method-match">;
++ def ObjCCStringFormat : DiagGroup<"cstring-format-directive">;
++ def CoveredSwitchDefault : DiagGroup<"covered-switch-default">;
++ def SwitchBool     : DiagGroup<"switch-bool">;
++ def SwitchEnum     : DiagGroup<"switch-enum">;
++ def Switch         : DiagGroup<"switch">;
++ def ImplicitFallthroughPerFunction :
++   DiagGroup<"implicit-fallthrough-per-function">;
++ def ImplicitFallthrough  : DiagGroup<"implicit-fallthrough",
++                                      [ImplicitFallthroughPerFunction]>;
++ def InvalidPPToken : DiagGroup<"invalid-pp-token">;
++ def Trigraphs      : DiagGroup<"trigraphs">;
++ 
++ def UndefinedReinterpretCast : DiagGroup<"undefined-reinterpret-cast">;
++ def ReinterpretBaseClass : DiagGroup<"reinterpret-base-class">;
++ def Unicode  : DiagGroup<"unicode">;
++ def UninitializedMaybe : DiagGroup<"conditional-uninitialized">;
++ def UninitializedSometimes : DiagGroup<"sometimes-uninitialized">;
++ def UninitializedStaticSelfInit : DiagGroup<"static-self-init">;
++ def UninitializedConstReference : DiagGroup<"uninitialized-const-reference">;
++ def Uninitialized  : DiagGroup<"uninitialized", [UninitializedSometimes,
++                                                  UninitializedStaticSelfInit,
++                                                  UninitializedConstReference]>;
++ def IgnoredPragmaIntrinsic : DiagGroup<"ignored-pragma-intrinsic">;
++ // #pragma optimize is often used to avoid to work around MSVC codegen bugs or
++ // to disable inlining. It's not completely clear what alternative to suggest
++ // (#pragma clang optimize, noinline) so suggest nothing for now.
++ def IgnoredPragmaOptimize : DiagGroup<"ignored-pragma-optimize">;
++ def UnknownPragmas : DiagGroup<"unknown-pragmas">;
++ def IgnoredPragmas : DiagGroup<"ignored-pragmas",
++     [IgnoredPragmaIntrinsic, IgnoredPragmaOptimize]>;
++ def PragmaClangAttribute : DiagGroup<"pragma-clang-attribute">;
++ def PragmaPackSuspiciousInclude : DiagGroup<"pragma-pack-suspicious-include">;
++ def PragmaPack : DiagGroup<"pragma-pack", [PragmaPackSuspiciousInclude]>;
++ def Pragmas : DiagGroup<"pragmas", [UnknownPragmas, IgnoredPragmas,
++                                     PragmaClangAttribute, PragmaPack]>;
++ def UnknownWarningOption : DiagGroup<"unknown-warning-option">;
++ def NSobjectAttribute : DiagGroup<"NSObject-attribute">;
++ def NSConsumedMismatch : DiagGroup<"nsconsumed-mismatch">;
++ def NSReturnsMismatch : DiagGroup<"nsreturns-mismatch">;
++ 
++ def IndependentClassAttribute : DiagGroup<"IndependentClass-attribute">;
++ def UnknownAttributes : DiagGroup<"unknown-attributes">;
++ def IgnoredAttributes : DiagGroup<"ignored-attributes">;
++ def Attributes : DiagGroup<"attributes", [UnknownAttributes,
++                                           IgnoredAttributes]>;
++ def UnknownSanitizers : DiagGroup<"unknown-sanitizers">;
++ def UnnamedTypeTemplateArgs : DiagGroup<"unnamed-type-template-args",
++                                         [CXX98CompatUnnamedTypeTemplateArgs]>;
++ def UnsupportedFriend : DiagGroup<"unsupported-friend">;
++ def UnusedArgument : DiagGroup<"unused-argument">;
++ def UnusedCommandLineArgument : DiagGroup<"unused-command-line-argument">;
++ def IgnoredOptimizationArgument : DiagGroup<"ignored-optimization-argument">;
++ def InvalidCommandLineArgument : DiagGroup<"invalid-command-line-argument",
++                                            [IgnoredOptimizationArgument]>;
++ def UnusedComparison : DiagGroup<"unused-comparison">;
++ def UnusedExceptionParameter : DiagGroup<"unused-exception-parameter">;
++ def UnneededInternalDecl : DiagGroup<"unneeded-internal-declaration">;
++ def UnneededMemberFunction : DiagGroup<"unneeded-member-function">;
++ def UnusedPrivateField : DiagGroup<"unused-private-field">;
++ def UnusedFunction : DiagGroup<"unused-function", [UnneededInternalDecl]>;
++ def UnusedTemplate : DiagGroup<"unused-template", [UnneededInternalDecl]>;
++ def UnusedMemberFunction : DiagGroup<"unused-member-function",
++                                      [UnneededMemberFunction]>;
++ def UnusedLabel : DiagGroup<"unused-label">;
++ def UnusedLambdaCapture : DiagGroup<"unused-lambda-capture">;
++ def UnusedParameter : DiagGroup<"unused-parameter">;
++ def UnusedButSetParameter : DiagGroup<"unused-but-set-parameter">;
++ def UnusedResult : DiagGroup<"unused-result">;
++ def PotentiallyEvaluatedExpression : DiagGroup<"potentially-evaluated-expression">;
++ def UnevaluatedExpression : DiagGroup<"unevaluated-expression",
++                                       [PotentiallyEvaluatedExpression]>;
++ def UnusedValue : DiagGroup<"unused-value", [UnusedComparison, UnusedResult,
++                                              UnevaluatedExpression]>;
++ def UnusedConstVariable : DiagGroup<"unused-const-variable">;
++ def UnusedVariable : DiagGroup<"unused-variable",
++                                [UnusedConstVariable]>;
++ def UnusedButSetVariable : DiagGroup<"unused-but-set-variable">;
++ def UnusedLocalTypedef : DiagGroup<"unused-local-typedef">;
++ def UnusedPropertyIvar :  DiagGroup<"unused-property-ivar">;
++ def UnusedGetterReturnValue : DiagGroup<"unused-getter-return-value">;
++ def UsedButMarkedUnused : DiagGroup<"used-but-marked-unused">;
++ def UserDefinedLiterals : DiagGroup<"user-defined-literals">;
++ def UserDefinedWarnings : DiagGroup<"user-defined-warnings">;
++ def ReorderCtor : DiagGroup<"reorder-ctor">;
++ def ReorderInitList : DiagGroup<"reorder-init-list">;
++ def Reorder : DiagGroup<"reorder", [ReorderCtor, ReorderInitList]>;
++ def UndeclaredSelector : DiagGroup<"undeclared-selector">;
++ def ImplicitAtomic : DiagGroup<"implicit-atomic-properties">;
++ def AtomicAlignment : DiagGroup<"atomic-alignment">;
++ def CustomAtomic : DiagGroup<"custom-atomic-properties">;
++ def AtomicProperties : DiagGroup<"atomic-properties",
++                                  [ImplicitAtomic, CustomAtomic]>;
++ def ARCUnsafeRetainedAssign : DiagGroup<"arc-unsafe-retained-assign">;
++ def ARCRetainCycles : DiagGroup<"arc-retain-cycles">;
++ def ARCNonPodMemAccess : DiagGroup<"arc-non-pod-memaccess">;
++ def AutomaticReferenceCounting : DiagGroup<"arc",
++                                            [ARCUnsafeRetainedAssign,
++                                             ARCRetainCycles,
++                                             ARCNonPodMemAccess]>;
++ def ARCRepeatedUseOfWeakMaybe : DiagGroup<"arc-maybe-repeated-use-of-weak">;
++ def ARCRepeatedUseOfWeak : DiagGroup<"arc-repeated-use-of-weak",
++                                      [ARCRepeatedUseOfWeakMaybe]>;
++ def BlockCaptureAutoReleasing : DiagGroup<"block-capture-autoreleasing">;
++ def ObjCBridge : DiagGroup<"bridge-cast">;
++ 
++ def DeallocInCategory:DiagGroup<"dealloc-in-category">;
++ def SelectorTypeMismatch : DiagGroup<"selector-type-mismatch">;
++ def Selector : DiagGroup<"selector", [SelectorTypeMismatch]>;
++ def Protocol : DiagGroup<"protocol">;
++ // No longer in use, preserve for backwards compatibility.
++ def : DiagGroup<"at-protocol">;
++ def PropertyAccessDotSyntax: DiagGroup<"property-access-dot-syntax">;
++ def PropertyAttr : DiagGroup<"property-attribute-mismatch">;
++ def SuperSubClassMismatch : DiagGroup<"super-class-method-mismatch">;
++ def OverridingMethodMismatch : DiagGroup<"overriding-method-mismatch">;
++ def VariadicMacros : DiagGroup<"variadic-macros">;
++ def VectorConversion : DiagGroup<"vector-conversion">;      // clang specific
++ def VexingParse : DiagGroup<"vexing-parse">;
++ def VLAExtension : DiagGroup<"vla-extension">;
++ def VLA : DiagGroup<"vla", [VLAExtension]>;
++ def VolatileRegisterVar : DiagGroup<"volatile-register-var">;
++ def Visibility : DiagGroup<"visibility">;
++ def ZeroLengthArray : DiagGroup<"zero-length-array">;
++ def GNUZeroLineDirective : DiagGroup<"gnu-zero-line-directive">;
++ def GNUZeroVariadicMacroArguments : DiagGroup<"gnu-zero-variadic-macro-arguments">;
++ def MisleadingIndentation : DiagGroup<"misleading-indentation">;
++ 
++ // This covers both the deprecated case (in C++98)
++ // and the extension case (in C++11 onwards).
++ def WritableStrings : DiagGroup<"writable-strings", [DeprecatedWritableStr]>;
++ 
++ // GCC calls -Wdeprecated-writable-strings -Wwrite-strings.
++ //
++ // Bizarrely, this warning flag enables -fconst-strings in C. This is
++ // GCC-compatible, but really weird.
++ //
++ // FIXME: Should this affect C++11 (where this is an error,
++ //        not just deprecated) or not?
++ def GCCWriteStrings : DiagGroup<"write-strings" , [WritableStrings]>;
++ 
++ def CharSubscript : DiagGroup<"char-subscripts">;
++ def LargeByValueCopy : DiagGroup<"large-by-value-copy">;
++ def DuplicateArgDecl : DiagGroup<"duplicate-method-arg">;
++ def SignedEnumBitfield : DiagGroup<"signed-enum-bitfield">;
++ 
++ def ReservedIdentifier : DiagGroup<"reserved-identifier",
++     [ReservedIdAsMacro]>;
++ 
++ // Unreachable code warning groups.
++ //
++ //  The goal is make -Wunreachable-code on by default, in -Wall, or at
++ //  least actively used, with more noisy versions of the warning covered
++ //  under separate flags.
++ //
++ def UnreachableCodeLoopIncrement : DiagGroup<"unreachable-code-loop-increment">;
++ def UnreachableCodeFallthrough : DiagGroup<"unreachable-code-fallthrough">;
++ def UnreachableCode : DiagGroup<"unreachable-code",
++                                 [UnreachableCodeLoopIncrement,
++                                  UnreachableCodeFallthrough]>;
++ def UnreachableCodeBreak : DiagGroup<"unreachable-code-break">;
++ def UnreachableCodeReturn : DiagGroup<"unreachable-code-return">;
++ def UnreachableCodeAggressive : DiagGroup<"unreachable-code-aggressive",
++                                     [UnreachableCode,
++                                      UnreachableCodeBreak,
++                                      UnreachableCodeReturn]>;
++ 
++ // Aggregation warning settings.
++ 
++ // Populate -Waddress with warnings from other groups.
++ def : DiagGroup<"address", [PointerBoolConversion,
++                             StringCompare,
++                             TautologicalPointerCompare]>;
++ 
++ // -Widiomatic-parentheses contains warnings about 'idiomatic'
++ // missing parentheses;  it is off by default.  We do not include it
++ // in -Wparentheses because most users who use -Wparentheses explicitly
++ // do not want these warnings.
++ def ParenthesesOnEquality : DiagGroup<"parentheses-equality">;
++ def Parentheses : DiagGroup<"parentheses",
++                             [LogicalOpParentheses,
++                              LogicalNotParentheses,
++                              BitwiseConditionalParentheses,
++                              BitwiseOpParentheses,
++                              ShiftOpParentheses,
++                              OverloadedShiftOpParentheses,
++                              ParenthesesOnEquality,
++                              DanglingElse]>;
++ 
++ // -Wconversion has its own warnings, but we split a few out for
++ // legacy reasons:
++ //   - some people want just 64-to-32 warnings
++ //   - conversion warnings with constant sources are on by default
++ //   - conversion warnings for literals are on by default
++ //   - bool-to-pointer conversion warnings are on by default
++ //   - __null-to-integer conversion warnings are on by default
++ def Conversion : DiagGroup<"conversion",
++                            [BoolConversion,
++                             ConstantConversion,
++                             EnumConversion,
++                             BitFieldEnumConversion,
++                             FloatConversion,
++                             Shorten64To32,
++                             IntConversion,
++                             ImplicitIntConversion,
++                             ImplicitFloatConversion,
++                             LiteralConversion,
++                             NonLiteralNullConversion, // (1-1)->pointer (etc)
++                             NullConversion, // NULL->non-pointer
++                             ObjCLiteralConversion,
++                             SignConversion,
++                             StringConversion]>,
++                  DiagCategory<"Value Conversion Issue">;
++ 
++ def Unused : DiagGroup<"unused",
++                        [UnusedArgument, UnusedFunction, UnusedLabel,
++                         // UnusedParameter, (matches GCC's behavior)
++                         // UnusedTemplate, (clean-up libc++ before enabling)
++                         // UnusedMemberFunction, (clean-up llvm before enabling)
++                         UnusedPrivateField, UnusedLambdaCapture,
++                         UnusedLocalTypedef, UnusedValue, UnusedVariable,
++                         UnusedButSetVariable, UnusedPropertyIvar]>,
++                         DiagCategory<"Unused Entity Issue">;
++ 
++ // Format settings.
++ def FormatInvalidSpecifier : DiagGroup<"format-invalid-specifier">;
++ def FormatSecurity : DiagGroup<"format-security">;
++ def FormatNonStandard : DiagGroup<"format-non-iso">;
++ def FormatY2K : DiagGroup<"format-y2k">;
++ def FormatPedantic : DiagGroup<"format-pedantic">;
++ def FormatTypeConfusion : DiagGroup<"format-type-confusion">;
++ def Format : DiagGroup<"format",
++                        [FormatExtraArgs, FormatZeroLength, NonNull,
++                         FormatSecurity, FormatY2K, FormatInvalidSpecifier,
++                         FormatInsufficientArgs]>,
++              DiagCategory<"Format String Issue">;
++ def FormatNonLiteral : DiagGroup<"format-nonliteral">;
++ def Format2 : DiagGroup<"format=2",
++                         [FormatNonLiteral, FormatSecurity, FormatY2K]>;
++ 
++ def TypeSafety : DiagGroup<"type-safety">;
++ 
++ def IncompatibleExceptionSpec : DiagGroup<"incompatible-exception-spec">;
++ 
++ def IntToVoidPointerCast : DiagGroup<"int-to-void-pointer-cast">;
++ def IntToPointerCast : DiagGroup<"int-to-pointer-cast",
++                                  [IntToVoidPointerCast]>;
++ def VoidPointerToEnumCast : DiagGroup<"void-pointer-to-enum-cast">;
++ def VoidPointerToIntCast : DiagGroup<"void-pointer-to-int-cast",
++                                      [VoidPointerToEnumCast]>;
++ def PointerToEnumCast : DiagGroup<"pointer-to-enum-cast",
++                                   [VoidPointerToEnumCast]>;
++ def PointerToIntCast : DiagGroup<"pointer-to-int-cast",
++                                  [PointerToEnumCast, VoidPointerToIntCast]>;
++ 
++ def FUseLdPath : DiagGroup<"fuse-ld-path">;
++ 
++ def Move : DiagGroup<"move", [
++     PessimizingMove,
++     RedundantMove,
++     ReturnStdMove,
++     SelfMove
++   ]>;
++ 
++ def Extra : DiagGroup<"extra", [
++     DeprecatedCopy,
++     MissingFieldInitializers,
++     IgnoredQualifiers,
++     InitializerOverrides,
++     SemiBeforeMethodBody,
++     MissingMethodReturnType,
++     SignCompare,
++     UnusedParameter,
++     UnusedButSetParameter,
++     NullPointerArithmetic,
++     NullPointerSubtraction,
++     EmptyInitStatement,
++     StringConcatation,
++     FUseLdPath,
++   ]>;
++ 
++ def Most : DiagGroup<"most", [
++     BoolOperation,
++     CharSubscript,
++     Comment,
++     DeleteNonVirtualDtor,
++     Format,
++     ForLoopAnalysis,
++     FrameAddress,
++     Implicit,
++     InfiniteRecursion,
++     IntInBoolContext,
++     MismatchedTags,
++     MissingBraces,
++     Move,
++     MultiChar,
++     RangeLoopConstruct,
++     Reorder,
++     ReturnType,
++     SelfAssignment,
++     SelfMove,
++     SizeofArrayArgument,
++     SizeofArrayDecay,
++     StringPlusInt,
++     TautologicalCompare,
++     Trigraphs,
++     Uninitialized,
++     UnknownPragmas,
++     Unused,
++     VolatileRegisterVar,
++     ObjCMissingSuperCalls,
++     ObjCDesignatedInit,
++     ObjCFlexibleArray,
++     OverloadedVirtual,
++     PrivateExtern,
++     SelTypeCast,
++     ExternCCompat,
++     UserDefinedWarnings
++  ]>;
++ 
++ // Thread Safety warnings
++ def ThreadSafetyAttributes : DiagGroup<"thread-safety-attributes">;
++ def ThreadSafetyAnalysis   : DiagGroup<"thread-safety-analysis">;
++ def ThreadSafetyPrecise    : DiagGroup<"thread-safety-precise">;
++ def ThreadSafetyReference  : DiagGroup<"thread-safety-reference">;
++ def ThreadSafetyNegative   : DiagGroup<"thread-safety-negative">;
++ def ThreadSafety : DiagGroup<"thread-safety",
++                              [ThreadSafetyAttributes,
++                               ThreadSafetyAnalysis,
++                               ThreadSafetyPrecise,
++                               ThreadSafetyReference]>;
++ def ThreadSafetyVerbose : DiagGroup<"thread-safety-verbose">;
++ def ThreadSafetyBeta : DiagGroup<"thread-safety-beta">;
++ 
++ // Uniqueness Analysis warnings
++ def Consumed       : DiagGroup<"consumed">;
++ 
++ // Note that putting warnings in -Wall will not disable them by default. If a
++ // warning should be active _only_ when -Wall is passed in, mark it as
++ // DefaultIgnore in addition to putting it here.
++ def All : DiagGroup<"all", [Most, Parentheses, Switch, SwitchBool,
++                             MisleadingIndentation]>;
++ 
++ // Warnings that should be in clang-cl /w4.
++ def : DiagGroup<"CL4", [All, Extra]>;
++ 
++ // Warnings enabled by -pedantic.  This is magically filled in by TableGen.
++ def Pedantic : DiagGroup<"pedantic">;
++ 
++ // Aliases.
++ def : DiagGroup<"", [Extra]>;                   // -W = -Wextra
++ def : DiagGroup<"endif-labels", [ExtraTokens]>; // -Wendif-labels=-Wextra-tokens
++ def : DiagGroup<"cpp", [PoundWarning]>;         // -Wcpp = -W#warnings
++ def : DiagGroup<"comments", [Comment]>;         // -Wcomments = -Wcomment
++ def : DiagGroup<"conversion-null",
++                 [NullConversion]>; // -Wconversion-null = -Wnull-conversion
++ def : DiagGroup<"bool-conversions",
++                 [BoolConversion]>; // -Wbool-conversions  = -Wbool-conversion
++ def : DiagGroup<"int-conversions",
++                 [IntConversion]>; // -Wint-conversions = -Wint-conversion
++ def : DiagGroup<"vector-conversions",
++                 [VectorConversion]>; // -Wvector-conversions = -Wvector-conversion
++ def : DiagGroup<"unused-local-typedefs", [UnusedLocalTypedef]>;
++                 // -Wunused-local-typedefs = -Wunused-local-typedef
++ 
++ // A warning group for warnings that we want to have on by default in clang,
++ // but which aren't on by default in GCC.
++ def NonGCC : DiagGroup<"non-gcc",
++     [SignCompare, Conversion, LiteralRange]>;
++ 
++ // A warning group for warnings about using C++11 features as extensions in
++ // earlier C++ versions.
++ def CXX11 : DiagGroup<"c++11-extensions", [CXX11ExtraSemi, CXX11InlineNamespace,
++                                            CXX11LongLong]>;
++ 
++ // A warning group for warnings about using C++14 features as extensions in
++ // earlier C++ versions.
++ def CXX14 : DiagGroup<"c++14-extensions", [CXX14BinaryLiteral]>;
++ 
++ // A warning group for warnings about using C++17 features as extensions in
++ // earlier C++ versions.
++ def CXX17 : DiagGroup<"c++17-extensions">;
++ 
++ // A warning group for warnings about using C++20 features as extensions in
++ // earlier C++ versions.
++ def CXX20 : DiagGroup<"c++20-extensions", [CXX20Designator]>;
++ 
++ // A warning group for warnings about using C++2b features as extensions in
++ // earlier C++ versions.
++ def CXX2b : DiagGroup<"c++2b-extensions">;
++ 
++ def : DiagGroup<"c++0x-extensions", [CXX11]>;
++ def : DiagGroup<"c++1y-extensions", [CXX14]>;
++ def : DiagGroup<"c++1z-extensions", [CXX17]>;
++ def : DiagGroup<"c++2a-extensions", [CXX20]>;
++ 
++ def DelegatingCtorCycles :
++   DiagGroup<"delegating-ctor-cycles">;
++ 
++ // A warning group for warnings about using C11 features as extensions.
++ def C11 : DiagGroup<"c11-extensions">;
++ 
++ // A warning group for warnings about using C99 features as extensions.
++ def C99 : DiagGroup<"c99-extensions", [C99Designator]>;
++ 
++ // A warning group for warnings about using C2x features as extensions.
++ def C2x : DiagGroup<"c2x-extensions">;
++ 
++ // A warning group for warnings about GCC extensions.
++ def GNU : DiagGroup<"gnu", [GNUAlignofExpression, GNUAnonymousStruct,
++                             GNUAutoType,
++                             GNUBinaryLiteral, GNUCaseRange,
++                             GNUComplexInteger, GNUCompoundLiteralInitializer,
++                             GNUConditionalOmittedOperand, GNUDesignator,
++                             GNUEmptyInitializer, GNUEmptyStruct,
++                             VLAExtension, GNUFlexibleArrayInitializer,
++                             GNUFlexibleArrayUnionMember, GNUFoldingConstant,
++                             GNUImaginaryConstant, GNUIncludeNext,
++                             GNULabelsAsValue,
++                             RedeclaredClassMember, GNURedeclaredEnum,
++                             GNUStatementExpression, GNUStaticFloatInit,
++                             GNUStringLiteralOperatorTemplate,
++                             GNUUnionCast, GNUVariableSizedTypeNotAtEnd,
++                             ZeroLengthArray, GNUZeroLineDirective,
++                             GNUZeroVariadicMacroArguments]>;
++ // A warning group for warnings about code that clang accepts but gcc doesn't.
++ def GccCompat : DiagGroup<"gcc-compat">;
++ 
++ // A warning group for warnings about code that may be incompatible on AIX.
++ def AIXCompat : DiagGroup<"aix-compat">;
++ 
++ // Warnings for Microsoft extensions.
++ def MicrosoftCharize : DiagGroup<"microsoft-charize">;
++ def MicrosoftDrectveSection : DiagGroup<"microsoft-drectve-section">;
++ def MicrosoftInclude : DiagGroup<"microsoft-include">;
++ def MicrosoftCppMacro : DiagGroup<"microsoft-cpp-macro">;
++ def MicrosoftFixedEnum : DiagGroup<"microsoft-fixed-enum">;
++ def MicrosoftSealed : DiagGroup<"microsoft-sealed">;
++ def MicrosoftAbstract : DiagGroup<"microsoft-abstract">;
++ def MicrosoftUnqualifiedFriend : DiagGroup<"microsoft-unqualified-friend">;
++ def MicrosoftExceptionSpec : DiagGroup<"microsoft-exception-spec">;
++ def MicrosoftUsingDecl : DiagGroup<"microsoft-using-decl">;
++ def MicrosoftMutableReference : DiagGroup<"microsoft-mutable-reference">;
++ def MicrosoftPureDefinition : DiagGroup<"microsoft-pure-definition">;
++ def MicrosoftUnionMemberReference : DiagGroup<
++     "microsoft-union-member-reference">;
++ def MicrosoftExplicitConstructorCall : DiagGroup<
++     "microsoft-explicit-constructor-call">;
++ def MicrosoftEnumValue : DiagGroup<"microsoft-enum-value">;
++ def MicrosoftDefaultArgRedefinition :
++     DiagGroup<"microsoft-default-arg-redefinition">;
++ def MicrosoftTemplateShadow : DiagGroup<"microsoft-template-shadow">;
++ def MicrosoftTemplate : DiagGroup<"microsoft-template", [MicrosoftTemplateShadow]>;
++ def MicrosoftInconsistentDllImport : DiagGroup<"inconsistent-dllimport">;
++ def MicrosoftRedeclareStatic : DiagGroup<"microsoft-redeclare-static">;
++ def MicrosoftEnumForwardReference :
++     DiagGroup<"microsoft-enum-forward-reference">;
++ def MicrosoftGoto : DiagGroup<"microsoft-goto">;
++ def MicrosoftFlexibleArray : DiagGroup<"microsoft-flexible-array">;
++ def MicrosoftExtraQualification : DiagGroup<"microsoft-extra-qualification">;
++ def MicrosoftCast : DiagGroup<"microsoft-cast">;
++ def MicrosoftConstInit : DiagGroup<"microsoft-const-init">;
++ def MicrosoftVoidPseudoDtor : DiagGroup<"microsoft-void-pseudo-dtor">;
++ def MicrosoftAnonTag : DiagGroup<"microsoft-anon-tag">;
++ def MicrosoftCommentPaste : DiagGroup<"microsoft-comment-paste">;
++ def MicrosoftEndOfFile : DiagGroup<"microsoft-end-of-file">;
++ def MicrosoftInaccessibleBase : DiagGroup<"microsoft-inaccessible-base">;
++ def MicrosoftStaticAssert : DiagGroup<"microsoft-static-assert">;
++ 
++ // Aliases.
++ def : DiagGroup<"msvc-include", [MicrosoftInclude]>;
++                 // -Wmsvc-include = -Wmicrosoft-include
++ 
++ // Warnings group for warnings about Microsoft extensions.
++ def Microsoft : DiagGroup<"microsoft",
++     [MicrosoftCharize, MicrosoftDrectveSection, MicrosoftInclude,
++      MicrosoftCppMacro, MicrosoftFixedEnum, MicrosoftSealed, MicrosoftAbstract,
++      MicrosoftUnqualifiedFriend, MicrosoftExceptionSpec, MicrosoftUsingDecl,
++      MicrosoftMutableReference, MicrosoftPureDefinition,
++      MicrosoftUnionMemberReference, MicrosoftExplicitConstructorCall,
++      MicrosoftEnumValue, MicrosoftDefaultArgRedefinition, MicrosoftTemplate,
++      MicrosoftRedeclareStatic, MicrosoftEnumForwardReference, MicrosoftGoto,
++      MicrosoftFlexibleArray, MicrosoftExtraQualification, MicrosoftCast,
++      MicrosoftConstInit, MicrosoftVoidPseudoDtor, MicrosoftAnonTag,
++      MicrosoftCommentPaste, MicrosoftEndOfFile, MicrosoftStaticAssert,
++      MicrosoftInconsistentDllImport]>;
++ 
++ def ClangClPch : DiagGroup<"clang-cl-pch">;
++ 
++ def ObjCNonUnifiedException : DiagGroup<"objc-nonunified-exceptions">;
++ 
++ def ObjCProtocolMethodImpl : DiagGroup<"objc-protocol-method-implementation">;
++ 
++ def ObjCNoPropertyAutoSynthesis : DiagGroup<"objc-property-synthesis">;
++ 
++ // ObjC API warning groups.
++ def ObjCRedundantLiteralUse : DiagGroup<"objc-redundant-literal-use">;
++ def ObjCRedundantAPIUse : DiagGroup<"objc-redundant-api-use", [
++     ObjCRedundantLiteralUse
++   ]>;
++ 
++ def ObjCCocoaAPI : DiagGroup<"objc-cocoa-api", [
++     ObjCRedundantAPIUse
++   ]>;
++ 
++ def ObjCStringComparison : DiagGroup<"objc-string-compare">;
++ def ObjCStringConcatenation : DiagGroup<"objc-string-concatenation">;
++ def ObjCLiteralComparison : DiagGroup<"objc-literal-compare", [
++     ObjCStringComparison
++   ]>;
++ 
++ def ObjCSignedCharBool : DiagGroup<"objc-signed-char-bool",
++   [ObjCSignedCharBoolImplicitIntConversion,
++    ObjCSignedCharBoolImplicitFloatConversion,
++    ObjCBoolConstantConversion,
++    TautologicalObjCBoolCompare]>;
++ 
++ def ObjCPotentiallyDirectSelector : DiagGroup<"potentially-direct-selector">;
++ def ObjCStrictPotentiallyDirectSelector :
++   DiagGroup<"strict-potentially-direct-selector",
++             [ObjCPotentiallyDirectSelector]>;
++ 
++ // Inline ASM warnings.
++ def ASMOperandWidths : DiagGroup<"asm-operand-widths">;
++ def ASM : DiagGroup<"asm", [
++     ASMOperandWidths
++   ]>;
++ 
++ // Linker warnings.
++ def LinkerWarnings : DiagGroup<"linker-warnings">;
++ 
++ // OpenMP warnings.
++ def SourceUsesOpenMP : DiagGroup<"source-uses-openmp">;
++ def OpenMPClauses : DiagGroup<"openmp-clauses">;
++ def OpenMPLoopForm : DiagGroup<"openmp-loop-form">;
++ def OpenMPMapping : DiagGroup<"openmp-mapping">;
++ def OpenMPTarget : DiagGroup<"openmp-target", [OpenMPMapping]>;
++ def OpenMPPre51Compat : DiagGroup<"pre-openmp-51-compat">;
++ def OpenMP51Ext : DiagGroup<"openmp-51-extensions">;
++ def OpenMP : DiagGroup<"openmp", [
++     SourceUsesOpenMP, OpenMPClauses, OpenMPLoopForm, OpenMPTarget,
++     OpenMPMapping, OpenMP51Ext
++   ]>;
++ 
++ // Backend warnings.
++ def BackendInlineAsm : DiagGroup<"inline-asm">;
++ def BackendSourceMgr : DiagGroup<"source-mgr">;
++ def BackendFrameLargerThan : DiagGroup<"frame-larger-than">;
++ // Compatibility flag name from old versions of Clang.
++ def : DiagGroup<"frame-larger-than=", [BackendFrameLargerThan]>;
++ def BackendPlugin : DiagGroup<"backend-plugin">;
++ def RemarkBackendPlugin : DiagGroup<"remark-backend-plugin">;
++ def BackendOptimizationRemark : DiagGroup<"pass">;
++ def BackendOptimizationRemarkMissed : DiagGroup<"pass-missed">;
++ def BackendOptimizationRemarkAnalysis : DiagGroup<"pass-analysis">;
++ def BackendOptimizationFailure : DiagGroup<"pass-failed">;
++ def BackendWarningAttributes : DiagGroup<"attribute-warning">;
++ 
++ // Instrumentation based profiling warnings.
++ def ProfileInstrMissing : DiagGroup<"profile-instr-missing">;
++ def ProfileInstrOutOfDate : DiagGroup<"profile-instr-out-of-date">;
++ def ProfileInstrUnprofiled : DiagGroup<"profile-instr-unprofiled">;
++ 
++ // AddressSanitizer frontend instrumentation remarks.
++ def SanitizeAddressRemarks : DiagGroup<"sanitize-address">;
++ 
++ // Issues with serialized diagnostics.
++ def SerializedDiagnostics : DiagGroup<"serialized-diagnostics">;
++ 
++ // A warning group for warnings about code that clang accepts when
++ // compiling CUDA C/C++ but which is not compatible with the CUDA spec.
++ def CudaCompat : DiagGroup<"cuda-compat">;
++ 
++ // Warning about unknown CUDA SDK version.
++ def CudaUnknownVersion: DiagGroup<"unknown-cuda-version">;
++ 
++ // A warning group for warnings about features supported by HIP but
++ // ignored by CUDA.
++ def HIPOnly : DiagGroup<"hip-only">;
++ 
++ // Warnings which cause linking of the runtime libraries like
++ // libc and the CRT to be skipped.
++ def AVRRtlibLinkingQuirks : DiagGroup<"avr-rtlib-linking-quirks">;
++ 
++ // A warning group for things that will change semantics in the future.
++ def FutureCompat : DiagGroup<"future-compat">;
++ 
++ def InvalidOrNonExistentDirectory : DiagGroup<"invalid-or-nonexistent-directory">;
++ 
++ def OptionIgnored : DiagGroup<"option-ignored">;
++ 
++ def UnknownArgument : DiagGroup<"unknown-argument">;
++ 
++ // A warning group for warnings about code that clang accepts when
++ // compiling OpenCL C/C++ but which is not compatible with the SPIR spec.
++ def SpirCompat : DiagGroup<"spir-compat">;
++ 
++ // Warning for the GlobalISel options.
++ def GlobalISel : DiagGroup<"global-isel">;
++ 
++ // A warning group specifically for warnings related to function
++ // multiversioning.
++ def FunctionMultiVersioning : DiagGroup<"function-multiversion">;
++ 
++ def NoDeref : DiagGroup<"noderef">;
++ 
++ // A group for cross translation unit static analysis related warnings.
++ def CrossTU : DiagGroup<"ctu">;
++ 
++ def CTADMaybeUnsupported : DiagGroup<"ctad-maybe-unsupported">;
++ 
++ def FortifySource : DiagGroup<"fortify-source">;
++ 
++ def MaxTokens : DiagGroup<"max-tokens"> {
++   code Documentation = [{
++ The warning is issued if the number of pre-processor tokens exceeds
++ the token limit, which can be set in three ways:
++ 
++ 1. As a limit at a specific point in a file, using the ``clang max_tokens_here``
++    pragma:
++ 
++    .. code-block: c++
++       #pragma clang max_tokens_here 1234
++ 
++ 2. As a per-translation unit limit, using the ``-fmax-tokens=`` command-line
++    flag:
++ 
++    .. code-block: console
++       clang -c a.cpp -fmax-tokens=1234
++ 
++ 3. As a per-translation unit limit using the ``clang max_tokens_total`` pragma,
++    which works like and overrides the ``-fmax-tokens=`` flag:
++ 
++    .. code-block: c++
++       #pragma clang max_tokens_total 1234
++ 
++ These limits can be helpful in limiting code growth through included files.
++ 
++ Setting a token limit of zero means no limit.
++ 
++ Note that the warning is disabled by default, so -Wmax-tokens must be used
++ in addition with the pragmas or -fmax-tokens flag to get any warnings.
++ }];
++ }
++ 
++ def WebAssemblyExceptionSpec : DiagGroup<"wasm-exception-spec">;
++ 
++ def RTTI : DiagGroup<"rtti">;
++ 
++ def OpenCLCoreFeaturesDiagGroup : DiagGroup<"pedantic-core-features">;
++ 
++ // Warnings and extensions to make preprocessor macro usage pedantic.
++ def PedanticMacros : DiagGroup<"pedantic-macros",
++                     [DeprecatedPragma,
++                      MacroRedefined,
++                      BuiltinMacroRedefined,
++                      RestrictExpansionMacro]>;
++diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
++index 0e803ee028ce..d06cd0041d19 100644
++--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
++@@ -1,11370 +1,11373 @@
++ //==--- DiagnosticSemaKinds.td - libsema diagnostics ----------------------===//
++ //
++ // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
++ // See https://llvm.org/LICENSE.txt for license information.
++ // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
++ //
++ //===----------------------------------------------------------------------===//
++ 
++ //===----------------------------------------------------------------------===//
++ // Semantic Analysis
++ //===----------------------------------------------------------------------===//
++ 
++ let Component = "Sema" in {
++ let CategoryName = "Semantic Issue" in {
++ def note_previous_decl : Note<"%0 declared here">;
++ def note_entity_declared_at : Note<"%0 declared here">;
++ def note_callee_decl : Note<"%0 declared here">;
++ def note_defined_here : Note<"%0 defined here">;
++ 
++ // For loop analysis
++ def warn_variables_not_in_loop_body : Warning<
++   "variable%select{s| %1|s %1 and %2|s %1, %2, and %3|s %1, %2, %3, and %4}0 "
++   "used in loop condition not modified in loop body">,
++   InGroup<ForLoopAnalysis>, DefaultIgnore;
++ def warn_redundant_loop_iteration : Warning<
++   "variable %0 is %select{decremented|incremented}1 both in the loop header "
++   "and in the loop body">,
++   InGroup<ForLoopAnalysis>, DefaultIgnore;
++ def note_loop_iteration_here : Note<"%select{decremented|incremented}0 here">;
++ 
++ def warn_duplicate_enum_values : Warning<
++   "element %0 has been implicitly assigned %1 which another element has "
++   "been assigned">, InGroup<DiagGroup<"duplicate-enum">>, DefaultIgnore;
++ def note_duplicate_element : Note<"element %0 also has value %1">;
++ 
++ // Absolute value functions
++ def warn_unsigned_abs : Warning<
++   "taking the absolute value of unsigned type %0 has no effect">,
++   InGroup<AbsoluteValue>;
++ def note_remove_abs : Note<
++   "remove the call to '%0' since unsigned values cannot be negative">;
++ def warn_abs_too_small : Warning<
++   "absolute value function %0 given an argument of type %1 but has parameter "
++   "of type %2 which may cause truncation of value">, InGroup<AbsoluteValue>;
++ def warn_wrong_absolute_value_type : Warning<
++   "using %select{integer|floating point|complex}1 absolute value function %0 "
++   "when argument is of %select{integer|floating point|complex}2 type">,
++   InGroup<AbsoluteValue>;
++ def note_replace_abs_function : Note<"use function '%0' instead">;
++ def warn_pointer_abs : Warning<
++   "taking the absolute value of %select{pointer|function|array}0 type %1 is suspicious">,
++   InGroup<AbsoluteValue>;
++ 
++ def warn_max_unsigned_zero : Warning<
++   "taking the max of "
++   "%select{a value and unsigned zero|unsigned zero and a value}0 "
++   "is always equal to the other value">,
++   InGroup<MaxUnsignedZero>;
++ def note_remove_max_call : Note<
++   "remove call to max function and unsigned zero argument">;
++ 
++ def warn_infinite_recursive_function : Warning<
++   "all paths through this function will call itself">,
++   InGroup<InfiniteRecursion>, DefaultIgnore;
++ 
++ def warn_comma_operator : Warning<"possible misuse of comma operator here">,
++   InGroup<DiagGroup<"comma">>, DefaultIgnore;
++ def note_cast_to_void : Note<"cast expression to void to silence warning">;
++ 
++ // Constant expressions
++ def err_expr_not_ice : Error<
++   "expression is not an %select{integer|integral}0 constant expression">;
++ def ext_expr_not_ice : Extension<
++   "expression is not an %select{integer|integral}0 constant expression; "
++   "folding it to a constant is a GNU extension">, InGroup<GNUFoldingConstant>;
++ def err_typecheck_converted_constant_expression : Error<
++   "value of type %0 is not implicitly convertible to %1">;
++ def err_typecheck_converted_constant_expression_disallowed : Error<
++   "conversion from %0 to %1 is not allowed in a converted constant expression">;
++ def err_typecheck_converted_constant_expression_indirect : Error<
++   "conversion from %0 to %1 in converted constant expression would "
++   "bind reference to a temporary">;
++ def err_expr_not_cce : Error<
++   "%select{case value|enumerator value|non-type template argument|"
++   "array size|explicit specifier argument|noexcept specifier argument}0 "
++   "is not a constant expression">;
++ def ext_cce_narrowing : ExtWarn<
++   "%select{case value|enumerator value|non-type template argument|"
++   "array size|explicit specifier argument|noexcept specifier argument}0 "
++   "%select{cannot be narrowed from type %2 to %3|"
++   "evaluates to %2, which cannot be narrowed to type %3}1">,
++   InGroup<CXX11Narrowing>, DefaultError, SFINAEFailure;
++ def err_ice_not_integral : Error<
++   "%select{integer|integral}1 constant expression must have "
++   "%select{integer|integral or unscoped enumeration}1 type, not %0">;
++ def err_ice_incomplete_type : Error<
++   "integral constant expression has incomplete class type %0">;
++ def err_ice_explicit_conversion : Error<
++   "integral constant expression requires explicit conversion from %0 to %1">;
++ def note_ice_conversion_here : Note<
++   "conversion to %select{integral|enumeration}0 type %1 declared here">;
++ def err_ice_ambiguous_conversion : Error<
++   "ambiguous conversion from type %0 to an integral or unscoped "
++   "enumeration type">;
++ def err_ice_too_large : Error<
++   "integer constant expression evaluates to value %0 that cannot be "
++   "represented in a %1-bit %select{signed|unsigned}2 integer type">;
++ def err_expr_not_string_literal : Error<"expression is not a string literal">;
++ 
++ // Semantic analysis of constant literals.
++ def ext_predef_outside_function : Warning<
++   "predefined identifier is only valid inside function">,
++   InGroup<DiagGroup<"predefined-identifier-outside-function">>;
++ def warn_float_overflow : Warning<
++   "magnitude of floating-point constant too large for type %0; maximum is %1">,
++    InGroup<LiteralRange>;
++ def warn_float_underflow : Warning<
++   "magnitude of floating-point constant too small for type %0; minimum is %1">,
++   InGroup<LiteralRange>;
++ def warn_double_const_requires_fp64 : Warning<
++   "double precision constant requires %select{cl_khr_fp64|cl_khr_fp64 and __opencl_c_fp64}0, "
++   "casting to single precision">;
++ def err_half_const_requires_fp16 : Error<
++   "half precision constant requires cl_khr_fp16">;
++ 
++ // C99 variable-length arrays
++ def ext_vla : Extension<"variable length arrays are a C99 feature">,
++   InGroup<VLAExtension>;
++ def warn_vla_used : Warning<"variable length array used">,
++   InGroup<VLA>, DefaultIgnore;
++ def err_vla_in_sfinae : Error<
++   "variable length array cannot be formed during template argument deduction">;
++ def err_array_star_in_function_definition : Error<
++   "variable length array must be bound in function definition">;
++ def err_vla_decl_in_file_scope : Error<
++   "variable length array declaration not allowed at file scope">;
++ def err_vla_decl_has_static_storage : Error<
++   "variable length array declaration cannot have 'static' storage duration">;
++ def err_vla_decl_has_extern_linkage : Error<
++   "variable length array declaration cannot have 'extern' linkage">;
++ def ext_vla_folded_to_constant : ExtWarn<
++   "variable length array folded to constant array as an extension">,
++   InGroup<GNUFoldingConstant>;
++ def err_vla_unsupported : Error<
++   "variable length arrays are not supported for the current target">;
++ def note_vla_unsupported : Note<
++   "variable length arrays are not supported for the current target">;
++ 
++ // C99 variably modified types
++ def err_variably_modified_template_arg : Error<
++   "variably modified type %0 cannot be used as a template argument">;
++ def err_variably_modified_nontype_template_param : Error<
++   "non-type template parameter of variably modified type %0">;
++ def err_variably_modified_new_type : Error<
++   "'new' cannot allocate object of variably modified type %0">;
++ 
++ // C99 Designated Initializers
++ def ext_designated_init : Extension<
++   "designated initializers are a C99 feature">, InGroup<C99Designator>;
++ def err_array_designator_negative : Error<
++   "array designator value '%0' is negative">;
++ def err_array_designator_empty_range : Error<
++   "array designator range [%0, %1] is empty">;
++ def err_array_designator_non_array : Error<
++   "array designator cannot initialize non-array type %0">;
++ def err_array_designator_too_large : Error<
++   "array designator index (%0) exceeds array bounds (%1)">;
++ def err_field_designator_non_aggr : Error<
++   "field designator cannot initialize a "
++   "%select{non-struct, non-union|non-class}0 type %1">;
++ def err_field_designator_unknown : Error<
++   "field designator %0 does not refer to any field in type %1">;
++ def err_field_designator_nonfield : Error<
++   "field designator %0 does not refer to a non-static data member">;
++ def note_field_designator_found : Note<"field designator refers here">;
++ def err_designator_for_scalar_or_sizeless_init : Error<
++   "designator in initializer for %select{scalar|indivisible sizeless}0 "
++   "type %1">;
++ def warn_initializer_overrides : Warning<
++   "initializer %select{partially |}0overrides prior initialization of "
++   "this subobject">, InGroup<InitializerOverrides>;
++ def ext_initializer_overrides : ExtWarn<warn_initializer_overrides.Text>,
++   InGroup<InitializerOverrides>, SFINAEFailure;
++ def err_initializer_overrides_destructed : Error<
++   "initializer would partially override prior initialization of object of "
++   "type %1 with non-trivial destruction">;
++ def note_previous_initializer : Note<
++   "previous initialization %select{|with side effects }0is here"
++   "%select{| (side effects will not occur at run time)}0">;
++ def err_designator_into_flexible_array_member : Error<
++   "designator into flexible array member subobject">;
++ def note_flexible_array_member : Note<
++   "initialized flexible array member %0 is here">;
++ def ext_flexible_array_init : Extension<
++   "flexible array initialization is a GNU extension">, InGroup<GNUFlexibleArrayInitializer>;
++ 
++ // C++20 designated initializers
++ def ext_cxx_designated_init : Extension<
++   "designated initializers are a C++20 extension">, InGroup<CXX20Designator>;
++ def warn_cxx17_compat_designated_init : Warning<
++   "designated initializers are incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20CompatPedantic>, DefaultIgnore;
++ def ext_designated_init_mixed : ExtWarn<
++   "mixture of designated and non-designated initializers in the same "
++   "initializer list is a C99 extension">, InGroup<C99Designator>;
++ def note_designated_init_mixed : Note<
++   "first non-designated initializer is here">;
++ def ext_designated_init_array : ExtWarn<
++   "array designators are a C99 extension">, InGroup<C99Designator>;
++ def ext_designated_init_nested : ExtWarn<
++   "nested designators are a C99 extension">, InGroup<C99Designator>;
++ def ext_designated_init_reordered : ExtWarn<
++   "ISO C++ requires field designators to be specified in declaration order; "
++   "field %1 will be initialized after field %0">, InGroup<ReorderInitList>,
++   SFINAEFailure;
++ def note_previous_field_init : Note<
++   "previous initialization for field %0 is here">;
++ def ext_designated_init_brace_elision : ExtWarn<
++   "brace elision for designated initializer is a C99 extension">,
++   InGroup<C99Designator>, SFINAEFailure;
++ 
++ // Declarations.
++ def ext_plain_complex : ExtWarn<
++   "plain '_Complex' requires a type specifier; assuming '_Complex double'">;
++ def ext_imaginary_constant : Extension<
++   "imaginary constants are a GNU extension">, InGroup<GNUImaginaryConstant>;
++ def ext_integer_complex : Extension<
++   "complex integer types are a GNU extension">, InGroup<GNUComplexInteger>;
++ 
++ def err_invalid_saturation_spec : Error<"'_Sat' specifier is only valid on "
++   "'_Fract' or '_Accum', not '%0'">;
++ def err_invalid_sign_spec : Error<"'%0' cannot be signed or unsigned">;
++ def err_invalid_width_spec : Error<
++   "'%select{|short|long|long long}0 %1' is invalid">;
++ def err_invalid_complex_spec : Error<"'_Complex %0' is invalid">;
++ 
++ def ext_auto_type_specifier : ExtWarn<
++   "'auto' type specifier is a C++11 extension">, InGroup<CXX11>;
++ def warn_auto_storage_class : Warning<
++   "'auto' storage class specifier is redundant and incompatible with C++11">,
++   InGroup<CXX11Compat>, DefaultIgnore;
++ 
++ def warn_deprecated_register : Warning<
++   "'register' storage class specifier is deprecated "
++   "and incompatible with C++17">, InGroup<DeprecatedRegister>;
++ def ext_register_storage_class : ExtWarn<
++   "ISO C++17 does not allow 'register' storage class specifier">,
++   DefaultError, InGroup<Register>;
++ 
++ def err_invalid_decl_spec_combination : Error<
++   "cannot combine with previous '%0' declaration specifier">;
++ def err_invalid_vector_decl_spec_combination : Error<
++   "cannot combine with previous '%0' declaration specifier. "
++   "'__vector' must be first">;
++ def err_invalid_pixel_decl_spec_combination : Error<
++   "'__pixel' must be preceded by '__vector'.  "
++   "'%0' declaration specifier not allowed here">;
++ def err_invalid_vector_bool_decl_spec : Error<
++   "cannot use '%0' with '__vector bool'">;
++ def err_invalid_vector_long_decl_spec : Error<
++   "cannot use 'long' with '__vector'">;
++ def err_invalid_vector_float_decl_spec : Error<
++   "cannot use 'float' with '__vector'">;
++ def err_invalid_vector_double_decl_spec : Error <
++   "use of 'double' with '__vector' requires VSX support to be enabled "
++   "(available on POWER7 or later)">;
++ def err_invalid_vector_bool_int128_decl_spec : Error <
++   "use of '__int128' with '__vector bool' requires VSX support enabled (on "
++   "POWER10 or later)">;
++ def err_invalid_vector_long_long_decl_spec : Error <
++   "use of 'long long' with '__vector bool' requires VSX support (available on "
++   "POWER7 or later) or extended Altivec support (available on POWER8 or later) "
++   "to be enabled">;
++ def err_invalid_vector_long_double_decl_spec : Error<
++   "cannot use 'long double' with '__vector'">;
++ def warn_vector_long_decl_spec_combination : Warning<
++   "Use of 'long' with '__vector' is deprecated">, InGroup<Deprecated>;
++ 
++ def err_redeclaration_different_type : Error<
++   "redeclaration of %0 with a different type%diff{: $ vs $|}1,2">;
++ def err_bad_variable_name : Error<
++   "%0 cannot be the name of a variable or data member">;
++ def err_bad_parameter_name : Error<
++   "%0 cannot be the name of a parameter">;
++ def err_bad_parameter_name_template_id : Error<
++   "parameter name cannot have template arguments">;
++ def ext_parameter_name_omitted_c2x : ExtWarn<
++   "omitting the parameter name in a function definition is a C2x extension">,
++   InGroup<C2x>;
++ def err_anyx86_interrupt_attribute : Error<
++   "%select{x86|x86-64}0 'interrupt' attribute only applies to functions that "
++   "have %select{a 'void' return type|"
++   "only a pointer parameter optionally followed by an integer parameter|"
++   "a pointer as the first parameter|a %2 type as the second parameter}1">;
++ def err_anyx86_interrupt_called : Error<
++   "interrupt service routine cannot be called directly">;
++ def warn_anyx86_interrupt_regsave : Warning<
++   "interrupt service routine should only call a function"
++   " with attribute 'no_caller_saved_registers'">,
++   InGroup<DiagGroup<"interrupt-service-routine">>;
++ def warn_arm_interrupt_calling_convention : Warning<
++    "call to function without interrupt attribute could clobber interruptee's VFP registers">,
++    InGroup<Extra>;
++ def warn_interrupt_attribute_invalid : Warning<
++    "%select{MIPS|MSP430|RISC-V}0 'interrupt' attribute only applies to "
++    "functions that have %select{no parameters|a 'void' return type}1">,
++    InGroup<IgnoredAttributes>;
++ def warn_riscv_repeated_interrupt_attribute : Warning<
++   "repeated RISC-V 'interrupt' attribute">, InGroup<IgnoredAttributes>;
++ def note_riscv_repeated_interrupt_attribute : Note<
++   "repeated RISC-V 'interrupt' attribute is here">;
++ def warn_unused_parameter : Warning<"unused parameter %0">,
++   InGroup<UnusedParameter>, DefaultIgnore;
++ def warn_unused_but_set_parameter : Warning<"parameter %0 set but not used">,
++   InGroup<UnusedButSetParameter>, DefaultIgnore;
++ def warn_unused_variable : Warning<"unused variable %0">,
++   InGroup<UnusedVariable>, DefaultIgnore;
++ def warn_unused_but_set_variable : Warning<"variable %0 set but not used">,
++   InGroup<UnusedButSetVariable>, DefaultIgnore;
++ def warn_unused_local_typedef : Warning<
++   "unused %select{typedef|type alias}0 %1">,
++   InGroup<UnusedLocalTypedef>, DefaultIgnore;
++ def warn_unused_property_backing_ivar :
++   Warning<"ivar %0 which backs the property is not "
++   "referenced in this property's accessor">,
++   InGroup<UnusedPropertyIvar>, DefaultIgnore;
++ def warn_unused_const_variable : Warning<"unused variable %0">,
++   InGroup<UnusedConstVariable>, DefaultIgnore;
++ def warn_unused_exception_param : Warning<"unused exception parameter %0">,
++   InGroup<UnusedExceptionParameter>, DefaultIgnore;
++ def warn_decl_in_param_list : Warning<
++   "declaration of %0 will not be visible outside of this function">,
++   InGroup<Visibility>;
++ def warn_redefinition_in_param_list : Warning<
++   "redefinition of %0 will not be visible outside of this function">,
++   InGroup<Visibility>;
++ def warn_empty_parens_are_function_decl : Warning<
++   "empty parentheses interpreted as a function declaration">,
++   InGroup<VexingParse>;
++ def warn_parens_disambiguated_as_function_declaration : Warning<
++   "parentheses were disambiguated as a function declaration">,
++   InGroup<VexingParse>;
++ def warn_parens_disambiguated_as_variable_declaration : Warning<
++   "parentheses were disambiguated as redundant parentheses around declaration "
++   "of variable named %0">, InGroup<VexingParse>;
++ def warn_redundant_parens_around_declarator : Warning<
++   "redundant parentheses surrounding declarator">,
++   InGroup<DiagGroup<"redundant-parens">>, DefaultIgnore;
++ def note_additional_parens_for_variable_declaration : Note<
++   "add a pair of parentheses to declare a variable">;
++ def note_raii_guard_add_name : Note<
++   "add a variable name to declare a %0 initialized with %1">;
++ def note_function_style_cast_add_parentheses : Note<
++   "add enclosing parentheses to perform a function-style cast">;
++ def note_remove_parens_for_variable_declaration : Note<
++   "remove parentheses to silence this warning">;
++ def note_empty_parens_function_call : Note<
++   "change this ',' to a ';' to call %0">;
++ def note_empty_parens_default_ctor : Note<
++   "remove parentheses to declare a variable">;
++ def note_empty_parens_zero_initialize : Note<
++   "replace parentheses with an initializer to declare a variable">;
++ def warn_unused_function : Warning<"unused function %0">,
++   InGroup<UnusedFunction>, DefaultIgnore;
++ def warn_unused_template : Warning<"unused %select{function|variable}0 template %1">,
++   InGroup<UnusedTemplate>, DefaultIgnore;
++ def warn_unused_member_function : Warning<"unused member function %0">,
++   InGroup<UnusedMemberFunction>, DefaultIgnore;
++ def warn_used_but_marked_unused: Warning<"%0 was marked unused but was used">,
++   InGroup<UsedButMarkedUnused>, DefaultIgnore;
++ def warn_unneeded_internal_decl : Warning<
++   "%select{function|variable}0 %1 is not needed and will not be emitted">,
++   InGroup<UnneededInternalDecl>, DefaultIgnore;
++ def warn_unneeded_static_internal_decl : Warning<
++   "'static' function %0 declared in header file "
++   "should be declared 'static inline'">,
++   InGroup<UnneededInternalDecl>, DefaultIgnore;
++ def warn_unneeded_member_function : Warning<
++   "member function %0 is not needed and will not be emitted">,
++   InGroup<UnneededMemberFunction>, DefaultIgnore;
++ def warn_unused_private_field: Warning<"private field %0 is not used">,
++   InGroup<UnusedPrivateField>, DefaultIgnore;
++ def warn_unused_lambda_capture: Warning<"lambda capture %0 is not "
++   "%select{used|required to be captured for this use}1">,
++   InGroup<UnusedLambdaCapture>, DefaultIgnore;
++ 
++ def warn_reserved_extern_symbol: Warning<
++   "identifier %0 is reserved because %select{"
++   "<ERROR>|" // ReservedIdentifierStatus::NotReserved
++   "it starts with '_' at global scope|"
++   "it starts with '__'|"
++   "it starts with '_' followed by a capital letter|"
++   "it contains '__'}1">,
++   InGroup<ReservedIdentifier>, DefaultIgnore;
++ 
++ def warn_parameter_size: Warning<
++   "%0 is a large (%1 bytes) pass-by-value argument; "
++   "pass it by reference instead ?">, InGroup<LargeByValueCopy>;
++ def warn_return_value_size: Warning<
++   "return value of %0 is a large (%1 bytes) pass-by-value object; "
++   "pass it by reference instead ?">, InGroup<LargeByValueCopy>;
++ def warn_return_value_udt: Warning<
++   "%0 has C-linkage specified, but returns user-defined type %1 which is "
++   "incompatible with C">, InGroup<ReturnTypeCLinkage>;
++ def warn_return_value_udt_incomplete: Warning<
++   "%0 has C-linkage specified, but returns incomplete type %1 which could be "
++   "incompatible with C">, InGroup<ReturnTypeCLinkage>;
++ def warn_implicit_function_decl : Warning<
++   "implicit declaration of function %0">,
++   InGroup<ImplicitFunctionDeclare>, DefaultIgnore;
++ def ext_implicit_function_decl : ExtWarn<
++   "implicit declaration of function %0 is invalid in C99">,
++   InGroup<ImplicitFunctionDeclare>;
++ def note_function_suggestion : Note<"did you mean %0?">;
++ 
++ def err_ellipsis_first_param : Error<
++   "ISO C requires a named parameter before '...'">;
++ def err_declarator_need_ident : Error<"declarator requires an identifier">;
++ def err_language_linkage_spec_unknown : Error<"unknown linkage language">;
++ def err_language_linkage_spec_not_ascii : Error<
++   "string literal in language linkage specifier cannot have an "
++   "encoding-prefix">;
++ def ext_use_out_of_scope_declaration : ExtWarn<
++   "use of out-of-scope declaration of %0%select{| whose type is not "
++   "compatible with that of an implicit declaration}1">,
++   InGroup<DiagGroup<"out-of-scope-function">>;
++ def err_inline_non_function : Error<
++   "'inline' can only appear on functions%select{| and non-local variables}0">;
++ def err_noreturn_non_function : Error<
++   "'_Noreturn' can only appear on functions">;
++ def warn_qual_return_type : Warning<
++   "'%0' type qualifier%s1 on return type %plural{1:has|:have}1 no effect">,
++   InGroup<IgnoredQualifiers>, DefaultIgnore;
++ def warn_deprecated_redundant_constexpr_static_def : Warning<
++   "out-of-line definition of constexpr static data member is redundant "
++   "in C++17 and is deprecated">,
++   InGroup<Deprecated>, DefaultIgnore;
++ 
++ def warn_decl_shadow :
++   Warning<"declaration shadows a %select{"
++           "local variable|"
++           "variable in %2|"
++           "static data member of %2|"
++           "field of %2|"
++           "typedef in %2|"
++           "type alias in %2|"
++           "structured binding}1">,
++   InGroup<Shadow>, DefaultIgnore;
++ def warn_decl_shadow_uncaptured_local :
++   Warning<warn_decl_shadow.Text>,
++   InGroup<ShadowUncapturedLocal>, DefaultIgnore;
++ def warn_ctor_parm_shadows_field:
++   Warning<"constructor parameter %0 shadows the field %1 of %2">,
++   InGroup<ShadowFieldInConstructor>, DefaultIgnore;
++ def warn_modifying_shadowing_decl :
++   Warning<"modifying constructor parameter %0 that shadows a "
++           "field of %1">,
++   InGroup<ShadowFieldInConstructorModified>, DefaultIgnore;
++ 
++ // C++ decomposition declarations
++ def err_decomp_decl_context : Error<
++   "decomposition declaration not permitted in this context">;
++ def warn_cxx14_compat_decomp_decl : Warning<
++   "decomposition declarations are incompatible with "
++   "C++ standards before C++17">, DefaultIgnore, InGroup<CXXPre17Compat>;
++ def ext_decomp_decl : ExtWarn<
++   "decomposition declarations are a C++17 extension">, InGroup<CXX17>;
++ def ext_decomp_decl_cond : ExtWarn<
++   "ISO C++17 does not permit structured binding declaration in a condition">,
++   InGroup<DiagGroup<"binding-in-condition">>;
++ def err_decomp_decl_spec : Error<
++   "decomposition declaration cannot be declared "
++   "%plural{1:'%1'|:with '%1' specifiers}0">;
++ def ext_decomp_decl_spec : ExtWarn<
++   "decomposition declaration declared "
++   "%plural{1:'%1'|:with '%1' specifiers}0 is a C++20 extension">,
++   InGroup<CXX20>;
++ def warn_cxx17_compat_decomp_decl_spec : Warning<
++   "decomposition declaration declared "
++   "%plural{1:'%1'|:with '%1' specifiers}0 "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def err_decomp_decl_type : Error<
++   "decomposition declaration cannot be declared with type %0; "
++   "declared type must be 'auto' or reference to 'auto'">;
++ def err_decomp_decl_parens : Error<
++   "decomposition declaration cannot be declared with parentheses">;
++ def err_decomp_decl_template : Error<
++   "decomposition declaration template not supported">;
++ def err_decomp_decl_not_alone : Error<
++   "decomposition declaration must be the only declaration in its group">;
++ def err_decomp_decl_requires_init : Error<
++   "decomposition declaration %0 requires an initializer">;
++ def err_decomp_decl_wrong_number_bindings : Error<
++   "type %0 decomposes into %3 %plural{1:element|:elements}2, but "
++   "%select{%plural{0:no|:only %1}1|%1}4 "
++   "%plural{1:name was|:names were}1 provided">;
++ def err_decomp_decl_unbindable_type : Error<
++   "cannot decompose %select{union|non-class, non-array}1 type %2">;
++ def err_decomp_decl_multiple_bases_with_members : Error<
++   "cannot decompose class type %1: "
++   "%select{its base classes %2 and|both it and its base class}0 %3 "
++   "have non-static data members">;
++ def err_decomp_decl_ambiguous_base : Error<
++   "cannot decompose members of ambiguous base class %1 of %0:%2">;
++ def err_decomp_decl_inaccessible_base : Error<
++   "cannot decompose members of inaccessible base class %1 of %0">,
++   AccessControl;
++ def err_decomp_decl_inaccessible_field : Error<
++   "cannot decompose %select{private|protected}0 member %1 of %3">,
++   AccessControl;
++ def err_decomp_decl_lambda : Error<
++   "cannot decompose lambda closure type">;
++ def err_decomp_decl_anon_union_member : Error<
++   "cannot decompose class type %0 because it has an anonymous "
++   "%select{struct|union}1 member">;
++ def err_decomp_decl_std_tuple_element_not_specialized : Error<
++   "cannot decompose this type; 'std::tuple_element<%0>::type' "
++   "does not name a type">;
++ def err_decomp_decl_std_tuple_size_not_constant : Error<
++   "cannot decompose this type; 'std::tuple_size<%0>::value' "
++   "is not a valid integral constant expression">;
++ def note_in_binding_decl_init : Note<
++   "in implicit initialization of binding declaration %0">;
++ 
++ def err_std_type_trait_not_class_template : Error<
++   "unsupported standard library implementation: "
++   "'std::%0' is not a class template">;
++ 
++ // C++ using declarations
++ def err_using_requires_qualname : Error<
++   "using declaration requires a qualified name">;
++ def err_using_typename_non_type : Error<
++   "'typename' keyword used on a non-type">;
++ def err_using_dependent_value_is_type : Error<
++   "dependent using declaration resolved to type without 'typename'">;
++ def err_using_decl_nested_name_specifier_is_not_class : Error<
++   "using declaration in class refers into '%0', which is not a class">;
++ def warn_cxx17_compat_using_decl_non_member_enumerator : Warning<
++   "member using declaration naming non-class '%0' enumerator is "
++   "incompatible with C++ standards before C++20">, InGroup<CXXPre20Compat>,
++   DefaultIgnore;
++ def err_using_decl_nested_name_specifier_is_current_class : Error<
++   "using declaration refers to its own class">;
++ def err_using_decl_nested_name_specifier_is_not_base_class : Error<
++   "using declaration refers into '%0', which is not a base class of %1">;
++ def err_using_decl_constructor_not_in_direct_base : Error<
++   "%0 is not a direct base of %1, cannot inherit constructors">;
++ def err_using_decl_can_not_refer_to_class_member : Error<
++   "using declaration cannot refer to class member">;
++ def warn_cxx17_compat_using_decl_class_member_enumerator : Warning<
++   "member using declaration naming a non-member enumerator is incompatible "
++   "with C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_using_decl_class_member_enumerator : ExtWarn<
++   "member using declaration naming a non-member enumerator is "
++   "a C++20 extension">, InGroup<CXX20>;
++ def err_using_enum_is_dependent : Error<
++   "using-enum cannot name a dependent type">;
++ def err_ambiguous_inherited_constructor : Error<
++   "constructor of %0 inherited from multiple base class subobjects">;
++ def note_ambiguous_inherited_constructor_using : Note<
++   "inherited from base class %0 here">;
++ def note_using_decl_class_member_workaround : Note<
++   "use %select{an alias declaration|a typedef declaration|a reference|"
++   "a const variable|a constexpr variable}0 instead">;
++ def err_using_decl_can_not_refer_to_namespace : Error<
++   "using declaration cannot refer to a namespace">;
++ def warn_cxx17_compat_using_decl_scoped_enumerator: Warning<
++   "using declaration naming a scoped enumerator is incompatible with "
++   "C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_using_decl_scoped_enumerator : ExtWarn<
++   "using declaration naming a scoped enumerator is a C++20 extension">,
++   InGroup<CXX20>;
++ def err_using_decl_constructor : Error<
++   "using declaration cannot refer to a constructor">;
++ def warn_cxx98_compat_using_decl_constructor : Warning<
++   "inheriting constructors are incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_using_decl_destructor : Error<
++   "using declaration cannot refer to a destructor">;
++ def err_using_decl_template_id : Error<
++   "using declaration cannot refer to a template specialization">;
++ def note_using_decl_target : Note<"target of using declaration">;
++ def note_using_decl_conflict : Note<"conflicting declaration">;
++ def err_using_decl_redeclaration : Error<"redeclaration of using declaration">;
++ def err_using_decl_conflict : Error<
++   "target of using declaration conflicts with declaration already in scope">;
++ def err_using_decl_conflict_reverse : Error<
++   "declaration conflicts with target of using declaration already in scope">;
++ def note_using_decl : Note<"%select{|previous }0using declaration">;
++ def err_using_decl_redeclaration_expansion : Error<
++   "using declaration pack expansion at block scope produces multiple values">;
++ def err_use_of_empty_using_if_exists : Error<
++   "reference to unresolved using declaration">;
++ def note_empty_using_if_exists_here : Note<
++   "using declaration annotated with 'using_if_exists' here">;
++ def err_using_if_exists_on_ctor : Error<
++   "'using_if_exists' attribute cannot be applied to an inheriting constructor">;
++ def err_using_enum_decl_redeclaration : Error<
++   "redeclaration of using-enum declaration">;
++ def note_using_enum_decl : Note<"%select{|previous }0using-enum declaration">;
++ 
++ def warn_access_decl_deprecated : Warning<
++   "access declarations are deprecated; use using declarations instead">,
++   InGroup<Deprecated>;
++ def err_access_decl : Error<
++   "ISO C++11 does not allow access declarations; "
++   "use using declarations instead">;
++ def warn_deprecated_copy : Warning<
++   "definition of implicit copy %select{constructor|assignment operator}1 "
++   "for %0 is deprecated because it has a user-declared copy "
++   "%select{assignment operator|constructor}1">,
++   InGroup<DeprecatedCopy>, DefaultIgnore;
++ def warn_deprecated_copy_with_dtor : Warning<
++   "definition of implicit copy %select{constructor|assignment operator}1 "
++   "for %0 is deprecated because it has a user-declared destructor">,
++   InGroup<DeprecatedCopyWithDtor>, DefaultIgnore;
++ def warn_deprecated_copy_with_user_provided_copy: Warning<
++   "definition of implicit copy %select{constructor|assignment operator}1 "
++   "for %0 is deprecated because it has a user-provided copy "
++   "%select{assignment operator|constructor}1">,
++   InGroup<DeprecatedCopyWithUserProvidedCopy>, DefaultIgnore;
++ def warn_deprecated_copy_with_user_provided_dtor : Warning<
++   "definition of implicit copy %select{constructor|assignment operator}1 "
++   "for %0 is deprecated because it has a user-provided destructor">,
++   InGroup<DeprecatedCopyWithUserProvidedDtor>, DefaultIgnore;
++ def warn_cxx17_compat_exception_spec_in_signature : Warning<
++   "mangled name of %0 will change in C++17 due to non-throwing exception "
++   "specification in function signature">, InGroup<CXX17CompatMangling>;
++ 
++ def warn_global_constructor : Warning<
++   "declaration requires a global constructor">,
++   InGroup<GlobalConstructors>, DefaultIgnore;
++ def warn_global_destructor : Warning<
++   "declaration requires a global destructor">,
++    InGroup<GlobalConstructors>, DefaultIgnore;
++ def warn_exit_time_destructor : Warning<
++   "declaration requires an exit-time destructor">,
++   InGroup<ExitTimeDestructors>, DefaultIgnore;
++ 
++ def err_invalid_thread : Error<
++   "'%0' is only allowed on variable declarations">;
++ def err_thread_non_global : Error<
++   "'%0' variables must have global storage">;
++ def err_thread_unsupported : Error<
++   "thread-local storage is not supported for the current target">;
++ 
++ // FIXME: Combine fallout warnings to just one warning.
++ def warn_maybe_falloff_nonvoid_function : Warning<
++   "non-void function does not return a value in all control paths">,
++   InGroup<ReturnType>;
++ def warn_falloff_nonvoid_function : Warning<
++   "non-void function does not return a value">,
++   InGroup<ReturnType>;
++ def err_maybe_falloff_nonvoid_block : Error<
++   "non-void block does not return a value in all control paths">;
++ def err_falloff_nonvoid_block : Error<
++   "non-void block does not return a value">;
++ def warn_maybe_falloff_nonvoid_coroutine : Warning<
++   "non-void coroutine does not return a value in all control paths">,
++   InGroup<ReturnType>;
++ def warn_falloff_nonvoid_coroutine : Warning<
++   "non-void coroutine does not return a value">,
++   InGroup<ReturnType>;
++ def warn_suggest_noreturn_function : Warning<
++   "%select{function|method}0 %1 could be declared with attribute 'noreturn'">,
++   InGroup<MissingNoreturn>, DefaultIgnore;
++ def warn_suggest_noreturn_block : Warning<
++   "block could be declared with attribute 'noreturn'">,
++   InGroup<MissingNoreturn>, DefaultIgnore;
++ 
++ // Unreachable code.
++ def warn_unreachable : Warning<
++   "code will never be executed">,
++   InGroup<UnreachableCode>, DefaultIgnore;
++ def warn_unreachable_break : Warning<
++   "'break' will never be executed">,
++   InGroup<UnreachableCodeBreak>, DefaultIgnore;
++ def warn_unreachable_return : Warning<
++   "'return' will never be executed">,
++   InGroup<UnreachableCodeReturn>, DefaultIgnore;
++ def warn_unreachable_loop_increment : Warning<
++   "loop will run at most once (loop increment never executed)">,
++   InGroup<UnreachableCodeLoopIncrement>, DefaultIgnore;
++ def warn_unreachable_fallthrough_attr : Warning<
++   "fallthrough annotation in unreachable code">,
++   InGroup<UnreachableCodeFallthrough>, DefaultIgnore;
++ def note_unreachable_silence : Note<
++   "silence by adding parentheses to mark code as explicitly dead">;
++ 
++ /// Built-in functions.
++ def ext_implicit_lib_function_decl : ExtWarn<
++   "implicitly declaring library function '%0' with type %1">,
++   InGroup<ImplicitFunctionDeclare>;
++ def note_include_header_or_declare : Note<
++   "include the header <%0> or explicitly provide a declaration for '%1'">;
++ def note_previous_builtin_declaration : Note<"%0 is a builtin with type %1">;
++ def warn_implicit_decl_no_jmp_buf
++     : Warning<"declaration of built-in function '%0' requires the declaration"
++     " of the 'jmp_buf' type, commonly provided in the header <setjmp.h>.">,
++       InGroup<DiagGroup<"incomplete-setjmp-declaration">>;
++ def warn_implicit_decl_requires_sysheader : Warning<
++   "declaration of built-in function '%1' requires inclusion of the header <%0>">,
++   InGroup<BuiltinRequiresHeader>;
++ def warn_redecl_library_builtin : Warning<
++   "incompatible redeclaration of library function %0">,
++   InGroup<DiagGroup<"incompatible-library-redeclaration">>;
++ def err_builtin_definition : Error<"definition of builtin function %0">;
++ def err_builtin_redeclare : Error<"cannot redeclare builtin function %0">;
++ def err_arm_invalid_specialreg : Error<"invalid special register for builtin">;
++ def err_arm_invalid_coproc : Error<"coprocessor %0 must be configured as "
++   "%select{GCP|CDE}1">;
++ def err_invalid_cpu_supports : Error<"invalid cpu feature string for builtin">;
++ def err_invalid_cpu_is : Error<"invalid cpu name for builtin">;
++ def err_invalid_cpu_specific_dispatch_value : Error<
++ "invalid option '%0' for %select{cpu_specific|cpu_dispatch}1">;
++ def warn_builtin_unknown : Warning<"use of unknown builtin %0">,
++   InGroup<ImplicitFunctionDeclare>, DefaultError;
++ def warn_cstruct_memaccess : Warning<
++   "%select{destination for|source of|first operand of|second operand of}0 this "
++   "%1 call is a pointer to record %2 that is not trivial to "
++   "%select{primitive-default-initialize|primitive-copy}3">,
++   InGroup<NonTrivialMemaccess>;
++ def note_nontrivial_field : Note<
++   "field is non-trivial to %select{copy|default-initialize}0">;
++ def err_non_trivial_c_union_in_invalid_context : Error<
++   "cannot %select{"
++   "use type %1 for a function/method parameter|"
++   "use type %1 for function/method return|"
++   "default-initialize an object of type %1|"
++   "declare an automatic variable of type %1|"
++   "copy-initialize an object of type %1|"
++   "assign to a variable of type %1|"
++   "construct an automatic compound literal of type %1|"
++   "capture a variable of type %1|"
++   "cannot use volatile type %1 where it causes an lvalue-to-rvalue conversion"
++   "}3 "
++   "since it %select{contains|is}2 a union that is non-trivial to "
++   "%select{default-initialize|destruct|copy}0">;
++ def note_non_trivial_c_union : Note<
++   "%select{%2 has subobjects that are|%3 has type %2 that is}0 "
++   "non-trivial to %select{default-initialize|destruct|copy}1">;
++ def warn_dyn_class_memaccess : Warning<
++   "%select{destination for|source of|first operand of|second operand of}0 this "
++   "%1 call is a pointer to %select{|class containing a }2dynamic class %3; "
++   "vtable pointer will be %select{overwritten|copied|moved|compared}4">,
++   InGroup<DynamicClassMemaccess>;
++ def note_bad_memaccess_silence : Note<
++   "explicitly cast the pointer to silence this warning">;
++ def warn_sizeof_pointer_expr_memaccess : Warning<
++   "'%0' call operates on objects of type %1 while the size is based on a "
++   "different type %2">,
++   InGroup<SizeofPointerMemaccess>;
++ def warn_sizeof_pointer_expr_memaccess_note : Note<
++   "did you mean to %select{dereference the argument to 'sizeof' (and multiply "
++   "it by the number of elements)|remove the addressof in the argument to "
++   "'sizeof' (and multiply it by the number of elements)|provide an explicit "
++   "length}0?">;
++ def warn_sizeof_pointer_type_memaccess : Warning<
++   "argument to 'sizeof' in %0 call is the same pointer type %1 as the "
++   "%select{destination|source}2; expected %3 or an explicit length">,
++   InGroup<SizeofPointerMemaccess>;
++ def warn_strlcpycat_wrong_size : Warning<
++   "size argument in %0 call appears to be size of the source; "
++   "expected the size of the destination">,
++   InGroup<DiagGroup<"strlcpy-strlcat-size">>;
++ def note_strlcpycat_wrong_size : Note<
++   "change size argument to be the size of the destination">;
++ def warn_memsize_comparison : Warning<
++   "size argument in %0 call is a comparison">,
++   InGroup<DiagGroup<"memsize-comparison">>;
++ def note_memsize_comparison_paren : Note<
++   "did you mean to compare the result of %0 instead?">;
++ def note_memsize_comparison_cast_silence : Note<
++   "explicitly cast the argument to size_t to silence this warning">;
++ def warn_suspicious_sizeof_memset : Warning<
++   "%select{'size' argument to memset is '0'|"
++   "setting buffer to a 'sizeof' expression}0"
++   "; did you mean to transpose the last two arguments?">,
++   InGroup<MemsetTransposedArgs>;
++ def note_suspicious_sizeof_memset_silence : Note<
++   "%select{parenthesize the third argument|"
++   "cast the second argument to 'int'}0 to silence">;
++ def warn_suspicious_bzero_size : Warning<"'size' argument to bzero is '0'">,
++   InGroup<SuspiciousBzero>;
++ def note_suspicious_bzero_size_silence : Note<
++   "parenthesize the second argument to silence">;
++ 
++ def warn_strncat_large_size : Warning<
++   "the value of the size argument in 'strncat' is too large, might lead to a "
++   "buffer overflow">, InGroup<StrncatSize>;
++ def warn_strncat_src_size : Warning<"size argument in 'strncat' call appears "
++   "to be size of the source">, InGroup<StrncatSize>;
++ def warn_strncat_wrong_size : Warning<
++   "the value of the size argument to 'strncat' is wrong">, InGroup<StrncatSize>;
++ def note_strncat_wrong_size : Note<
++   "change the argument to be the free space in the destination buffer minus "
++   "the terminating null byte">;
++ 
++ def warn_assume_side_effects : Warning<
++   "the argument to %0 has side effects that will be discarded">,
++   InGroup<DiagGroup<"assume">>;
++ def warn_assume_attribute_string_unknown : Warning<
++   "unknown assumption string '%0'; attribute is potentially ignored">,
++   InGroup<UnknownAssumption>;
++ def warn_assume_attribute_string_unknown_suggested : Warning<
++   "unknown assumption string '%0' may be misspelled; attribute is potentially "
++   "ignored, did you mean '%1'?">,
++   InGroup<MisspelledAssumption>;
++ 
++ def warn_builtin_chk_overflow : Warning<
++   "'%0' will always overflow; destination buffer has size %1,"
++   " but size argument is %2">,
++   InGroup<DiagGroup<"builtin-memcpy-chk-size">>;
++ 
++ def warn_fortify_source_overflow
++   : Warning<warn_builtin_chk_overflow.Text>, InGroup<FortifySource>;
++ def warn_fortify_source_size_mismatch : Warning<
++   "'%0' size argument is too large; destination buffer has size %1,"
++   " but size argument is %2">, InGroup<FortifySource>;
++ 
++ def warn_fortify_strlen_overflow: Warning<
++   "'%0' will always overflow; destination buffer has size %1,"
++   " but the source string has length %2 (including NUL byte)">,
++   InGroup<FortifySource>;
++ 
++ def warn_fortify_source_format_overflow : Warning<
++   "'%0' will always overflow; destination buffer has size %1,"
++   " but format string expands to at least %2">,
++   InGroup<FortifySource>;
++ 
++ 
++ /// main()
++ // static main() is not an error in C, just in C++.
++ def warn_static_main : Warning<"'main' should not be declared static">,
++     InGroup<Main>;
++ def err_static_main : Error<"'main' is not allowed to be declared static">;
++ def err_inline_main : Error<"'main' is not allowed to be declared inline">;
++ def ext_variadic_main : ExtWarn<
++   "'main' is not allowed to be declared variadic">, InGroup<Main>;
++ def ext_noreturn_main : ExtWarn<
++   "'main' is not allowed to be declared _Noreturn">, InGroup<Main>;
++ def note_main_remove_noreturn : Note<"remove '_Noreturn'">;
++ def err_constexpr_main : Error<
++   "'main' is not allowed to be declared %select{constexpr|consteval}0">;
++ def err_deleted_main : Error<"'main' is not allowed to be deleted">;
++ def err_mainlike_template_decl : Error<"%0 cannot be a template">;
++ def err_main_returns_nonint : Error<"'main' must return 'int'">;
++ def ext_main_returns_nonint : ExtWarn<"return type of 'main' is not 'int'">,
++     InGroup<MainReturnType>;
++ def note_main_change_return_type : Note<"change return type to 'int'">;
++ def err_main_surplus_args : Error<"too many parameters (%0) for 'main': "
++     "must be 0, 2, or 3">;
++ def warn_main_one_arg : Warning<"only one parameter on 'main' declaration">,
++     InGroup<Main>;
++ def err_main_arg_wrong : Error<"%select{first|second|third|fourth}0 "
++     "parameter of 'main' (%select{argument count|argument array|environment|"
++     "platform-specific data}0) must be of type %1">;
++ def warn_main_returns_bool_literal : Warning<"bool literal returned from "
++     "'main'">, InGroup<Main>;
++ def err_main_global_variable :
++     Error<"main cannot be declared as global variable">;
++ def warn_main_redefined : Warning<"variable named 'main' with external linkage "
++     "has undefined behavior">, InGroup<Main>;
++ def ext_main_used : Extension<
++   "ISO C++ does not allow 'main' to be used by a program">, InGroup<Main>;
++ 
++ /// parser diagnostics
++ def ext_no_declarators : ExtWarn<"declaration does not declare anything">,
++   InGroup<MissingDeclarations>;
++ def err_no_declarators : Error<"declaration does not declare anything">;
++ def ext_typedef_without_a_name : ExtWarn<"typedef requires a name">,
++   InGroup<MissingDeclarations>;
++ def err_typedef_not_identifier : Error<"typedef name must be an identifier">;
++ 
++ def ext_non_c_like_anon_struct_in_typedef : ExtWarn<
++   "anonymous non-C-compatible type given name for linkage purposes "
++   "by %select{typedef|alias}0 declaration; "
++   "add a tag name here">, InGroup<DiagGroup<"non-c-typedef-for-linkage">>;
++ def err_non_c_like_anon_struct_in_typedef : Error<
++   "anonymous non-C-compatible type given name for linkage purposes "
++   "by %select{typedef|alias}0 declaration after its linkage was computed; "
++   "add a tag name here to establish linkage prior to definition">;
++ def err_typedef_changes_linkage : Error<
++   "unsupported: anonymous type given name for linkage purposes "
++   "by %select{typedef|alias}0 declaration after its linkage was computed; "
++   "add a tag name here to establish linkage prior to definition">;
++ def note_non_c_like_anon_struct : Note<
++   "type is not C-compatible due to this "
++   "%select{base class|default member initializer|lambda expression|"
++   "friend declaration|member declaration}0">;
++ def note_typedef_for_linkage_here : Note<
++   "type is given name %0 for linkage purposes by this "
++   "%select{typedef|alias}1 declaration">;
++ 
++ def err_statically_allocated_object : Error<
++   "interface type cannot be statically allocated">;
++ def err_object_cannot_be_passed_returned_by_value : Error<
++   "interface type %1 cannot be %select{returned|passed}0 by value"
++   "; did you forget * in %1?">;
++ def err_parameters_retval_cannot_have_fp16_type : Error<
++   "%select{parameters|function return value}0 cannot have __fp16 type; did you forget * ?">;
++ def err_opencl_half_load_store : Error<
++   "%select{loading directly from|assigning directly to}0 pointer to type %1 requires "
++   "cl_khr_fp16. Use vector data %select{load|store}0 builtin functions instead">;
++ def err_opencl_cast_to_half : Error<"casting to type %0 is not allowed">;
++ def err_opencl_half_declaration : Error<
++   "declaring variable of type %0 is not allowed">;
++ def err_opencl_invalid_param : Error<
++   "declaring function parameter of type %0 is not allowed%select{; did you forget * ?|}1">;
++ def err_opencl_invalid_return : Error<
++   "declaring function return value of type %0 is not allowed %select{; did you forget * ?|}1">;
++ def warn_enum_value_overflow : Warning<"overflow in enumeration value">;
++ def warn_pragma_options_align_reset_failed : Warning<
++   "#pragma options align=reset failed: %0">,
++   InGroup<IgnoredPragmas>;
++ def err_pragma_options_align_mac68k_target_unsupported : Error<
++   "mac68k alignment pragma is not supported on this target">;
++ def warn_pragma_pack_invalid_alignment : Warning<
++   "expected #pragma pack parameter to be '1', '2', '4', '8', or '16'">,
++   InGroup<IgnoredPragmas>;
++ def err_pragma_pack_invalid_alignment : Error<
++   warn_pragma_pack_invalid_alignment.Text>;
++ def warn_pragma_pack_non_default_at_include : Warning<
++   "non-default #pragma pack value changes the alignment of struct or union "
++   "members in the included file">, InGroup<PragmaPackSuspiciousInclude>,
++   DefaultIgnore;
++ def warn_pragma_pack_modified_after_include : Warning<
++   "the current #pragma pack alignment value is modified in the included "
++   "file">, InGroup<PragmaPack>;
++ def warn_pragma_pack_no_pop_eof : Warning<"unterminated "
++   "'#pragma pack (push, ...)' at end of file">, InGroup<PragmaPack>;
++ def note_pragma_pack_here : Note<
++   "previous '#pragma pack' directive that modifies alignment is here">;
++ def note_pragma_pack_pop_instead_reset : Note<
++   "did you intend to use '#pragma pack (pop)' instead of '#pragma pack()'?">;
++ // Follow the Microsoft implementation.
++ def warn_pragma_pack_show : Warning<"value of #pragma pack(show) == %0">;
++ def warn_pragma_pack_pop_identifier_and_alignment : Warning<
++   "specifying both a name and alignment to 'pop' is undefined">;
++ def warn_pragma_pop_failed : Warning<"#pragma %0(pop, ...) failed: %1">,
++   InGroup<IgnoredPragmas>;
++ def err_pragma_fc_pp_scope : Error<
++   "'#pragma float_control push/pop' can only appear at file or namespace scope "
++   "or within a language linkage specification">;
++ def err_pragma_fc_noprecise_requires_nofenv : Error<
++   "'#pragma float_control(precise, off)' is illegal when fenv_access is enabled">;
++ def err_pragma_fc_except_requires_precise : Error<
++   "'#pragma float_control(except, on)' is illegal when precise is disabled">;
++ def err_pragma_fc_noprecise_requires_noexcept : Error<
++   "'#pragma float_control(precise, off)' is illegal when except is enabled">;
++ def err_pragma_fenv_requires_precise : Error<
++   "'#pragma STDC FENV_ACCESS ON' is illegal when precise is disabled">;
++ def warn_cxx_ms_struct :
++   Warning<"ms_struct may not produce Microsoft-compatible layouts for classes "
++           "with base classes or virtual functions">,
++   DefaultError, InGroup<IncompatibleMSStruct>;
++ def err_pragma_pack_identifer_not_supported : Error<
++   "specifying an identifier within `#pragma pack` is not supported on this target">;
++ def err_section_conflict : Error<"%0 causes a section type conflict with %1">;
++ def err_no_base_classes : Error<"invalid use of '__super', %0 has no base classes">;
++ def err_invalid_super_scope : Error<"invalid use of '__super', "
++   "this keyword can only be used inside class or member function scope">;
++ def err_super_in_lambda_unsupported : Error<
++   "use of '__super' inside a lambda is unsupported">;
++ 
++ def warn_pragma_unused_undeclared_var : Warning<
++   "undeclared variable %0 used as an argument for '#pragma unused'">,
++   InGroup<IgnoredPragmas>;
++ def warn_atl_uuid_deprecated : Warning<
++   "specifying 'uuid' as an ATL attribute is deprecated; use __declspec instead">,
++   InGroup<DeprecatedDeclarations>;
++ def warn_pragma_unused_expected_var_arg : Warning<
++   "only variables can be arguments to '#pragma unused'">,
++   InGroup<IgnoredPragmas>;
++ def err_pragma_push_visibility_mismatch : Error<
++   "#pragma visibility push with no matching #pragma visibility pop">;
++ def note_surrounding_namespace_ends_here : Note<
++   "surrounding namespace with visibility attribute ends here">;
++ def err_pragma_pop_visibility_mismatch : Error<
++   "#pragma visibility pop with no matching #pragma visibility push">;
++ def note_surrounding_namespace_starts_here : Note<
++   "surrounding namespace with visibility attribute starts here">;
++ def err_pragma_loop_invalid_argument_type : Error<
++   "invalid argument of type %0; expected an integer type">;
++ def err_pragma_loop_invalid_argument_value : Error<
++   "%select{invalid value '%0'; must be positive|value '%0' is too large}1">;
++ def err_pragma_loop_compatibility : Error<
++   "%select{incompatible|duplicate}0 directives '%1' and '%2'">;
++ def err_pragma_loop_precedes_nonloop : Error<
++   "expected a for, while, or do-while loop to follow '%0'">;
++ 
++ def err_pragma_attribute_matcher_subrule_contradicts_rule : Error<
++   "redundant attribute subject matcher sub-rule '%0'; '%1' already matches "
++   "those declarations">;
++ def err_pragma_attribute_matcher_negated_subrule_contradicts_subrule : Error<
++   "negated attribute subject matcher sub-rule '%0' contradicts sub-rule '%1'">;
++ def err_pragma_attribute_invalid_matchers : Error<
++   "attribute %0 can't be applied to %1">;
++ def err_pragma_attribute_stack_mismatch : Error<
++   "'#pragma clang attribute %select{%1.|}0pop' with no matching"
++   " '#pragma clang attribute %select{%1.|}0push'">;
++ def warn_pragma_attribute_unused : Warning<
++   "unused attribute %0 in '#pragma clang attribute push' region">,
++   InGroup<PragmaClangAttribute>;
++ def note_pragma_attribute_region_ends_here : Note<
++   "'#pragma clang attribute push' regions ends here">;
++ def err_pragma_attribute_no_pop_eof : Error<"unterminated "
++   "'#pragma clang attribute push' at end of file">;
++ def note_pragma_attribute_applied_decl_here : Note<
++   "when applied to this declaration">;
++ def err_pragma_attr_attr_no_push : Error<
++   "'#pragma clang attribute' attribute with no matching "
++   "'#pragma clang attribute push'">;
++ 
++ /// Objective-C parser diagnostics
++ def err_duplicate_class_def : Error<
++   "duplicate interface definition for class %0">;
++ def err_undef_superclass : Error<
++   "cannot find interface declaration for %0, superclass of %1">;
++ def err_forward_superclass : Error<
++   "attempting to use the forward class %0 as superclass of %1">;
++ def err_no_nsconstant_string_class : Error<
++   "cannot find interface declaration for %0">;
++ def err_recursive_superclass : Error<
++   "trying to recursively use %0 as superclass of %1">;
++ def err_conflicting_aliasing_type : Error<"conflicting types for alias %0">;
++ def warn_undef_interface : Warning<"cannot find interface declaration for %0">;
++ def warn_duplicate_protocol_def : Warning<
++   "duplicate protocol definition of %0 is ignored">,
++   InGroup<DiagGroup<"duplicate-protocol">>;
++ def err_protocol_has_circular_dependency : Error<
++   "protocol has circular dependency">;
++ def err_undeclared_protocol : Error<"cannot find protocol declaration for %0">;
++ def warn_undef_protocolref : Warning<"cannot find protocol definition for %0">;
++ def err_atprotocol_protocol : Error<
++   "@protocol is using a forward protocol declaration of %0">;
++ def warn_readonly_property : Warning<
++   "attribute 'readonly' of property %0 restricts attribute "
++   "'readwrite' of property inherited from %1">,
++   InGroup<PropertyAttr>;
++ 
++ def warn_property_attribute : Warning<
++   "'%1' attribute on property %0 does not match the property inherited from %2">,
++   InGroup<PropertyAttr>;
++ def warn_property_types_are_incompatible : Warning<
++   "property type %0 is incompatible with type %1 inherited from %2">,
++   InGroup<DiagGroup<"incompatible-property-type">>;
++ def warn_protocol_property_mismatch : Warning<
++   "property %select{of type %1|with attribute '%1'|without attribute '%1'|with "
++   "getter %1|with setter %1}0 was selected for synthesis">,
++   InGroup<DiagGroup<"protocol-property-synthesis-ambiguity">>;
++ def err_protocol_property_mismatch: Error<warn_protocol_property_mismatch.Text>;
++ def err_undef_interface : Error<"cannot find interface declaration for %0">;
++ def err_category_forward_interface : Error<
++   "cannot define %select{category|class extension}0 for undefined class %1">;
++ def err_class_extension_after_impl : Error<
++   "cannot declare class extension for %0 after class implementation">;
++ def note_implementation_declared : Note<
++   "class implementation is declared here">;
++ def note_while_in_implementation : Note<
++   "detected while default synthesizing properties in class implementation">;
++ def note_class_declared : Note<
++   "class is declared here">;
++ def note_receiver_class_declared : Note<
++   "receiver is instance of class declared here">;
++ def note_receiver_expr_here : Note<
++   "receiver expression is here">;
++ def note_receiver_is_id : Note<
++   "receiver is treated with 'id' type for purpose of method lookup">;
++ def note_suppressed_class_declare : Note<
++   "class with specified objc_requires_property_definitions attribute is declared here">;
++ def err_objc_root_class_subclass : Error<
++   "objc_root_class attribute may only be specified on a root class declaration">;
++ def err_restricted_superclass_mismatch : Error<
++   "cannot subclass a class that was declared with the "
++   "'objc_subclassing_restricted' attribute">;
++ def err_class_stub_subclassing_mismatch : Error<
++   "'objc_class_stub' attribute cannot be specified on a class that does not "
++   "have the 'objc_subclassing_restricted' attribute">;
++ def err_implementation_of_class_stub : Error<
++   "cannot declare implementation of a class declared with the "
++   "'objc_class_stub' attribute">;
++ def warn_objc_root_class_missing : Warning<
++   "class %0 defined without specifying a base class">,
++   InGroup<ObjCRootClass>;
++ def err_objc_runtime_visible_category : Error<
++   "cannot implement a category for class %0 that is only visible via the "
++   "Objective-C runtime">;
++ def err_objc_runtime_visible_subclass : Error<
++   "cannot implement subclass %0 of a superclass %1 that is only visible via the "
++   "Objective-C runtime">;
++ def note_objc_needs_superclass : Note<
++   "add a super class to fix this problem">;
++ def err_conflicting_super_class : Error<"conflicting super class name %0">;
++ def err_dup_implementation_class : Error<"reimplementation of class %0">;
++ def err_dup_implementation_category : Error<
++   "reimplementation of category %1 for class %0">;
++ def err_conflicting_ivar_type : Error<
++   "instance variable %0 has conflicting type%diff{: $ vs $|}1,2">;
++ def err_duplicate_ivar_declaration : Error<
++   "instance variable is already declared">;
++ def warn_on_superclass_use : Warning<
++   "class implementation may not have super class">;
++ def err_conflicting_ivar_bitwidth : Error<
++   "instance variable %0 has conflicting bit-field width">;
++ def err_conflicting_ivar_name : Error<
++   "conflicting instance variable names: %0 vs %1">;
++ def err_inconsistent_ivar_count : Error<
++   "inconsistent number of instance variables specified">;
++ def warn_undef_method_impl : Warning<"method definition for %0 not found">,
++   InGroup<DiagGroup<"incomplete-implementation">>;
++ def warn_objc_boxing_invalid_utf8_string : Warning<
++   "string is ill-formed as UTF-8 and will become a null %0 when boxed">,
++   InGroup<ObjCBoxing>;
++ 
++ def err_objc_non_runtime_protocol_in_protocol_expr : Error<
++   "cannot use a protocol declared 'objc_non_runtime_protocol' in a @protocol expression">;
++ def err_objc_direct_on_protocol : Error<
++   "'objc_direct' attribute cannot be applied to %select{methods|properties}0 "
++   "declared in an Objective-C protocol">;
++ def err_objc_direct_duplicate_decl : Error<
++   "%select{|direct }0%select{method|property}1 declaration conflicts "
++   "with previous %select{|direct }2declaration of %select{method|property}1 %3">;
++ def err_objc_direct_impl_decl_mismatch : Error<
++   "direct method was declared in %select{the primary interface|an extension|a category}0 "
++   "but is implemented in %select{the primary interface|a category|a different category}1">;
++ def err_objc_direct_missing_on_decl : Error<
++   "direct method implementation was previously declared not direct">;
++ def err_objc_direct_on_override : Error<
++   "methods that %select{override superclass methods|implement protocol requirements}0 cannot be direct">;
++ def err_objc_override_direct_method : Error<
++   "cannot override a method that is declared direct by a superclass">;
++ def warn_objc_direct_ignored : Warning<
++   "%0 attribute isn't implemented by this Objective-C runtime">,
++   InGroup<IgnoredAttributes>;
++ def warn_objc_direct_property_ignored : Warning<
++   "direct attribute on property %0 ignored (not implemented by this Objective-C runtime)">,
++   InGroup<IgnoredAttributes>;
++ def err_objc_direct_dynamic_property : Error<
++   "direct property cannot be @dynamic">;
++ def err_objc_direct_protocol_conformance : Error<
++   "%select{category %1|class extension}0 cannot conform to protocol %2 because "
++   "of direct members declared in interface %3">;
++ def note_direct_member_here : Note<"direct member declared here">;
++ 
++ def warn_conflicting_overriding_ret_types : Warning<
++   "conflicting return type in "
++   "declaration of %0%diff{: $ vs $|}1,2">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_conflicting_ret_types : Warning<
++   "conflicting return type in "
++   "implementation of %0%diff{: $ vs $|}1,2">,
++   InGroup<MismatchedReturnTypes>;
++ 
++ def warn_conflicting_overriding_ret_type_modifiers : Warning<
++   "conflicting distributed object modifiers on return type "
++   "in declaration of %0">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_conflicting_ret_type_modifiers : Warning<
++   "conflicting distributed object modifiers on return type "
++   "in implementation of %0">,
++   InGroup<DistributedObjectModifiers>;
++ 
++ def warn_non_covariant_overriding_ret_types : Warning<
++   "conflicting return type in "
++   "declaration of %0: %1 vs %2">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_non_covariant_ret_types : Warning<
++   "conflicting return type in "
++   "implementation of %0: %1 vs %2">,
++   InGroup<MethodSignatures>, DefaultIgnore;
++ 
++ def warn_conflicting_overriding_param_types : Warning<
++   "conflicting parameter types in "
++   "declaration of %0%diff{: $ vs $|}1,2">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_conflicting_param_types : Warning<
++   "conflicting parameter types in "
++   "implementation of %0%diff{: $ vs $|}1,2">,
++   InGroup<MismatchedParameterTypes>;
++ 
++ def warn_conflicting_param_modifiers : Warning<
++   "conflicting distributed object modifiers on parameter type "
++   "in implementation of %0">,
++   InGroup<DistributedObjectModifiers>;
++ 
++ def warn_conflicting_overriding_param_modifiers : Warning<
++   "conflicting distributed object modifiers on parameter type "
++   "in declaration of %0">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_non_contravariant_overriding_param_types : Warning<
++   "conflicting parameter types in "
++   "declaration of %0: %1 vs %2">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_non_contravariant_param_types : Warning<
++   "conflicting parameter types in "
++   "implementation of %0: %1 vs %2">,
++   InGroup<MethodSignatures>, DefaultIgnore;
++ 
++ def warn_conflicting_overriding_variadic :Warning<
++   "conflicting variadic declaration of method and its "
++   "implementation">,
++   InGroup<OverridingMethodMismatch>, DefaultIgnore;
++ 
++ def warn_conflicting_variadic :Warning<
++   "conflicting variadic declaration of method and its "
++   "implementation">;
++ 
++ def warn_category_method_impl_match:Warning<
++   "category is implementing a method which will also be implemented"
++   " by its primary class">, InGroup<ObjCProtocolMethodImpl>;
++ 
++ def warn_implements_nscopying : Warning<
++ "default assign attribute on property %0 which implements "
++ "NSCopying protocol is not appropriate with -fobjc-gc[-only]">;
++ 
++ def warn_multiple_method_decl : Warning<"multiple methods named %0 found">,
++   InGroup<ObjCMultipleMethodNames>;
++ def warn_strict_multiple_method_decl : Warning<
++   "multiple methods named %0 found">, InGroup<StrictSelector>, DefaultIgnore;
++ def warn_accessor_property_type_mismatch : Warning<
++   "type of property %0 does not match type of accessor %1">;
++ def note_conv_function_declared_at : Note<"type conversion function declared here">;
++ def note_method_declared_at : Note<"method %0 declared here">;
++ def note_direct_method_declared_at : Note<"direct method %0 declared here">;
++ def note_property_attribute : Note<"property %0 is declared "
++   "%select{deprecated|unavailable|partial}1 here">;
++ def err_setter_type_void : Error<"type of setter must be void">;
++ def err_duplicate_method_decl : Error<"duplicate declaration of method %0">;
++ def warn_duplicate_method_decl :
++   Warning<"multiple declarations of method %0 found and ignored">,
++   InGroup<MethodDuplicate>, DefaultIgnore;
++ def warn_objc_cdirective_format_string :
++   Warning<"using %0 directive in %select{NSString|CFString}1 "
++           "which is being passed as a formatting argument to the formatting "
++           "%select{method|CFfunction}2">,
++   InGroup<ObjCCStringFormat>, DefaultIgnore;
++ def err_objc_var_decl_inclass :
++     Error<"cannot declare variable inside @interface or @protocol">;
++ def err_missing_method_context : Error<
++   "missing context for method declaration">;
++ def err_objc_property_attr_mutually_exclusive : Error<
++   "property attributes '%0' and '%1' are mutually exclusive">;
++ def err_objc_property_requires_object : Error<
++   "property with '%0' attribute must be of object type">;
++ def warn_objc_property_assign_on_object : Warning<
++   "'assign' property of object type may become a dangling reference; consider using 'unsafe_unretained'">,
++   InGroup<ObjCPropertyAssignOnObjectType>, DefaultIgnore;
++ def warn_objc_property_no_assignment_attribute : Warning<
++   "no 'assign', 'retain', or 'copy' attribute is specified - "
++   "'assign' is assumed">,
++   InGroup<ObjCPropertyNoAttribute>;
++ def warn_objc_isa_use : Warning<
++   "direct access to Objective-C's isa is deprecated in favor of "
++   "object_getClass()">, InGroup<DeprecatedObjCIsaUsage>;
++ def warn_objc_isa_assign : Warning<
++   "assignment to Objective-C's isa is deprecated in favor of "
++   "object_setClass()">, InGroup<DeprecatedObjCIsaUsage>;
++ def warn_objc_pointer_masking : Warning<
++   "bitmasking for introspection of Objective-C object pointers is strongly "
++   "discouraged">,
++   InGroup<ObjCPointerIntrospect>;
++ def warn_objc_pointer_masking_performSelector : Warning<warn_objc_pointer_masking.Text>,
++   InGroup<ObjCPointerIntrospectPerformSelector>;
++ def warn_objc_property_default_assign_on_object : Warning<
++   "default property attribute 'assign' not appropriate for object">,
++   InGroup<ObjCPropertyNoAttribute>;
++ def warn_property_attr_mismatch : Warning<
++   "property attribute in class extension does not match the primary class">,
++   InGroup<PropertyAttr>;
++ def warn_property_implicitly_mismatched : Warning <
++   "primary property declaration is implicitly strong while redeclaration "
++   "in class extension is weak">,
++   InGroup<DiagGroup<"objc-property-implicit-mismatch">>;
++ def warn_objc_property_copy_missing_on_block : Warning<
++     "'copy' attribute must be specified for the block property "
++     "when -fobjc-gc-only is specified">;
++ def warn_objc_property_retain_of_block : Warning<
++     "retain'ed block property does not copy the block "
++     "- use copy attribute instead">, InGroup<ObjCRetainBlockProperty>;
++ def warn_objc_readonly_property_has_setter : Warning<
++     "setter cannot be specified for a readonly property">,
++     InGroup<ObjCReadonlyPropertyHasSetter>;
++ def warn_atomic_property_rule : Warning<
++   "writable atomic property %0 cannot pair a synthesized %select{getter|setter}1 "
++   "with a user defined %select{getter|setter}2">,
++   InGroup<DiagGroup<"atomic-property-with-user-defined-accessor">>;
++ def note_atomic_property_fixup_suggest : Note<"setter and getter must both be "
++   "synthesized, or both be user defined,or the property must be nonatomic">;
++ def err_atomic_property_nontrivial_assign_op : Error<
++   "atomic property of reference type %0 cannot have non-trivial assignment"
++   " operator">;
++ def warn_cocoa_naming_owned_rule : Warning<
++   "property follows Cocoa naming"
++   " convention for returning 'owned' objects">,
++   InGroup<DiagGroup<"objc-property-matches-cocoa-ownership-rule">>;
++ def err_cocoa_naming_owned_rule : Error<
++   "property follows Cocoa naming"
++   " convention for returning 'owned' objects">;
++ def note_cocoa_naming_declare_family : Note<
++   "explicitly declare getter %objcinstance0 with '%1' to return an 'unowned' "
++   "object">;
++ def warn_auto_synthesizing_protocol_property :Warning<
++   "auto property synthesis will not synthesize property %0"
++   " declared in protocol %1">,
++   InGroup<DiagGroup<"objc-protocol-property-synthesis">>;
++ def note_add_synthesize_directive : Note<
++   "add a '@synthesize' directive">;
++ def warn_no_autosynthesis_shared_ivar_property : Warning <
++   "auto property synthesis will not synthesize property "
++   "%0 because it cannot share an ivar with another synthesized property">,
++   InGroup<ObjCNoPropertyAutoSynthesis>;
++ def warn_no_autosynthesis_property : Warning<
++   "auto property synthesis will not synthesize property "
++   "%0 because it is 'readwrite' but it will be synthesized 'readonly' "
++   "via another property">,
++   InGroup<ObjCNoPropertyAutoSynthesis>;
++ def warn_autosynthesis_property_in_superclass : Warning<
++   "auto property synthesis will not synthesize property "
++   "%0; it will be implemented by its superclass, use @dynamic to "
++   "acknowledge intention">,
++   InGroup<ObjCNoPropertyAutoSynthesis>;
++ def warn_autosynthesis_property_ivar_match :Warning<
++   "autosynthesized property %0 will use %select{|synthesized}1 instance variable "
++   "%2, not existing instance variable %3">,
++   InGroup<DiagGroup<"objc-autosynthesis-property-ivar-name-match">>;
++ def warn_missing_explicit_synthesis : Warning <
++   "auto property synthesis is synthesizing property not explicitly synthesized">,
++   InGroup<DiagGroup<"objc-missing-property-synthesis">>, DefaultIgnore;
++ def warn_property_getter_owning_mismatch : Warning<
++   "property declared as returning non-retained objects"
++   "; getter returning retained objects">;
++ def warn_property_redecl_getter_mismatch : Warning<
++   "getter name mismatch between property redeclaration (%1) and its original "
++   "declaration (%0)">, InGroup<PropertyAttr>;
++ def err_property_setter_ambiguous_use : Error<
++   "synthesized properties %0 and %1 both claim setter %2 -"
++   " use of this setter will cause unexpected behavior">;
++ def warn_default_atomic_custom_getter_setter : Warning<
++   "atomic by default property %0 has a user defined %select{getter|setter}1 "
++   "(property should be marked 'atomic' if this is intended)">,
++   InGroup<CustomAtomic>, DefaultIgnore;
++ def err_use_continuation_class : Error<
++   "illegal redeclaration of property in class extension %0"
++   " (attribute must be 'readwrite', while its primary must be 'readonly')">;
++ def err_type_mismatch_continuation_class : Error<
++   "type of property %0 in class extension does not match "
++   "property type in primary class">;
++ def err_use_continuation_class_redeclaration_readwrite : Error<
++   "illegal redeclaration of 'readwrite' property in class extension %0"
++   " (perhaps you intended this to be a 'readwrite' redeclaration of a "
++   "'readonly' public property?)">;
++ def err_continuation_class : Error<"class extension has no primary class">;
++ def err_property_type : Error<"property cannot have array or function type %0">;
++ def err_missing_property_context : Error<
++   "missing context for property implementation declaration">;
++ def err_bad_property_decl : Error<
++   "property implementation must have its declaration in interface %0 or one of "
++   "its extensions">;
++ def err_category_property : Error<
++   "property declared in category %0 cannot be implemented in "
++   "class implementation">;
++ def note_property_declare : Note<
++   "property declared here">;
++ def note_protocol_property_declare : Note<
++   "it could also be property "
++   "%select{of type %1|without attribute '%1'|with attribute '%1'|with getter "
++   "%1|with setter %1}0 declared here">;
++ def note_property_synthesize : Note<
++   "property synthesized here">;
++ def err_synthesize_category_decl : Error<
++   "@synthesize not allowed in a category's implementation">;
++ def err_synthesize_on_class_property : Error<
++   "@synthesize not allowed on a class property %0">;
++ def err_missing_property_interface : Error<
++   "property implementation in a category with no category declaration">;
++ def err_bad_category_property_decl : Error<
++   "property implementation must have its declaration in the category %0">;
++ def err_bad_property_context : Error<
++   "property implementation must be in a class or category implementation">;
++ def err_missing_property_ivar_decl : Error<
++   "synthesized property %0 must either be named the same as a compatible"
++   " instance variable or must explicitly name an instance variable">;
++ def err_arc_perform_selector_retains : Error<
++   "performSelector names a selector which retains the object">;
++ def warn_arc_perform_selector_leaks : Warning<
++   "performSelector may cause a leak because its selector is unknown">,
++   InGroup<DiagGroup<"arc-performSelector-leaks">>;
++ def warn_dealloc_in_category : Warning<
++ "-dealloc is being overridden in a category">,
++ InGroup<DeallocInCategory>;
++ def err_gc_weak_property_strong_type : Error<
++   "weak attribute declared on a __strong type property in GC mode">;
++ def warn_arc_repeated_use_of_weak : Warning <
++   "weak %select{variable|property|implicit property|instance variable}0 %1 is "
++   "accessed multiple times in this %select{function|method|block|lambda}2 "
++   "but may be unpredictably set to nil; assign to a strong variable to keep "
++   "the object alive">,
++   InGroup<ARCRepeatedUseOfWeak>, DefaultIgnore;
++ def warn_implicitly_retains_self : Warning <
++   "block implicitly retains 'self'; explicitly mention 'self' to indicate "
++   "this is intended behavior">,
++   InGroup<DiagGroup<"implicit-retain-self">>, DefaultIgnore;
++ def warn_arc_possible_repeated_use_of_weak : Warning <
++   "weak %select{variable|property|implicit property|instance variable}0 %1 may "
++   "be accessed multiple times in this %select{function|method|block|lambda}2 "
++   "and may be unpredictably set to nil; assign to a strong variable to keep "
++   "the object alive">,
++   InGroup<ARCRepeatedUseOfWeakMaybe>, DefaultIgnore;
++ def note_arc_weak_also_accessed_here : Note<
++   "also accessed here">;
++ def err_incomplete_synthesized_property : Error<
++   "cannot synthesize property %0 with incomplete type %1">;
++ 
++ def err_property_ivar_type : Error<
++   "type of property %0 (%1) does not match type of instance variable %2 (%3)">;
++ def err_property_accessor_type : Error<
++   "type of property %0 (%1) does not match type of accessor %2 (%3)">;
++ def err_ivar_in_superclass_use : Error<
++   "property %0 attempting to use instance variable %1 declared in super class %2">;
++ def err_weak_property : Error<
++   "existing instance variable %1 for __weak property %0 must be __weak">;
++ def err_strong_property : Error<
++   "existing instance variable %1 for strong property %0 may not be __weak">;
++ def err_dynamic_property_ivar_decl : Error<
++   "dynamic property cannot have instance variable specification">;
++ def err_duplicate_ivar_use : Error<
++   "synthesized properties %0 and %1 both claim instance variable %2">;
++ def err_property_implemented : Error<"property %0 is already implemented">;
++ def warn_objc_missing_super_call : Warning<
++   "method possibly missing a [super %0] call">,
++   InGroup<ObjCMissingSuperCalls>;
++ def err_dealloc_bad_result_type : Error<
++   "dealloc return type must be correctly specified as 'void' under ARC, "
++   "instead of %0">;
++ def warn_undeclared_selector : Warning<
++   "undeclared selector %0">, InGroup<UndeclaredSelector>, DefaultIgnore;
++ def warn_undeclared_selector_with_typo : Warning<
++   "undeclared selector %0; did you mean %1?">,
++   InGroup<UndeclaredSelector>, DefaultIgnore;
++ def warn_implicit_atomic_property : Warning<
++   "property is assumed atomic by default">, InGroup<ImplicitAtomic>, DefaultIgnore;
++ def note_auto_readonly_iboutlet_fixup_suggest : Note<
++   "property should be changed to be readwrite">;
++ def warn_auto_readonly_iboutlet_property : Warning<
++   "readonly IBOutlet property %0 when auto-synthesized may "
++   "not work correctly with 'nib' loader">,
++   InGroup<DiagGroup<"readonly-iboutlet-property">>;
++ def warn_auto_implicit_atomic_property : Warning<
++   "property is assumed atomic when auto-synthesizing the property">,
++   InGroup<ImplicitAtomic>, DefaultIgnore;
++ def warn_unimplemented_selector:  Warning<
++   "no method with selector %0 is implemented in this translation unit">,
++   InGroup<Selector>, DefaultIgnore;
++ def warn_unimplemented_protocol_method : Warning<
++   "method %0 in protocol %1 not implemented">, InGroup<Protocol>;
++ def warn_multiple_selectors: Warning<
++   "several methods with selector %0 of mismatched types are found "
++   "for the @selector expression">,
++   InGroup<SelectorTypeMismatch>, DefaultIgnore;
++ def err_direct_selector_expression : Error<
++   "@selector expression formed with direct selector %0">;
++ def warn_potentially_direct_selector_expression : Warning<
++   "@selector expression formed with potentially direct selector %0">,
++   InGroup<ObjCPotentiallyDirectSelector>;
++ def warn_strict_potentially_direct_selector_expression : Warning<
++   warn_potentially_direct_selector_expression.Text>,
++   InGroup<ObjCStrictPotentiallyDirectSelector>, DefaultIgnore;
++ 
++ def err_objc_kindof_nonobject : Error<
++   "'__kindof' specifier cannot be applied to non-object type %0">;
++ def err_objc_kindof_wrong_position : Error<
++   "'__kindof' type specifier must precede the declarator">;
++ 
++ def err_objc_method_unsupported_param_ret_type : Error<
++   "%0 %select{parameter|return}1 type is unsupported; "
++   "support for vector types for this target is introduced in %2">;
++ 
++ def warn_messaging_unqualified_id : Warning<
++   "messaging unqualified id">, DefaultIgnore,
++   InGroup<DiagGroup<"objc-messaging-id">>;
++ def err_messaging_unqualified_id_with_direct_method : Error<
++   "messaging unqualified id with a method that is possibly direct">;
++ def err_messaging_super_with_direct_method : Error<
++   "messaging super with a direct method">;
++ def err_messaging_class_with_direct_method : Error<
++   "messaging a Class with a method that is possibly direct">;
++ 
++ // C++ declarations
++ def err_static_assert_expression_is_not_constant : Error<
++   "static_assert expression is not an integral constant expression">;
++ def err_constexpr_if_condition_expression_is_not_constant : Error<
++   "constexpr if condition is not a constant expression">;
++ def err_static_assert_failed : Error<"static_assert failed%select{ %1|}0">;
++ def err_static_assert_requirement_failed : Error<
++   "static_assert failed due to requirement '%0'%select{ %2|}1">;
++ 
++ def ext_inline_variable : ExtWarn<
++   "inline variables are a C++17 extension">, InGroup<CXX17>;
++ def warn_cxx14_compat_inline_variable : Warning<
++   "inline variables are incompatible with C++ standards before C++17">,
++   DefaultIgnore, InGroup<CXXPre17Compat>;
++ 
++ def warn_inline_namespace_reopened_noninline : Warning<
++   "inline namespace reopened as a non-inline namespace">,
++   InGroup<InlineNamespaceReopenedNoninline>;
++ def err_inline_namespace_mismatch : Error<
++   "non-inline namespace cannot be reopened as inline">;
++ 
++ def err_unexpected_friend : Error<
++   "friends can only be classes or functions">;
++ def ext_enum_friend : ExtWarn<
++   "befriending enumeration type %0 is a C++11 extension">, InGroup<CXX11>;
++ def warn_cxx98_compat_enum_friend : Warning<
++   "befriending enumeration type %0 is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def ext_nonclass_type_friend : ExtWarn<
++   "non-class friend type %0 is a C++11 extension">, InGroup<CXX11>;
++ def warn_cxx98_compat_nonclass_type_friend : Warning<
++   "non-class friend type %0 is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_friend_is_member : Error<
++   "friends cannot be members of the declaring class">;
++ def warn_cxx98_compat_friend_is_member : Warning<
++   "friend declaration naming a member of the declaring class is incompatible "
++   "with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def ext_unelaborated_friend_type : ExtWarn<
++   "unelaborated friend declaration is a C++11 extension; specify "
++   "'%select{struct|interface|union|class|enum}0' to befriend %1">,
++   InGroup<CXX11>;
++ def warn_cxx98_compat_unelaborated_friend_type : Warning<
++   "befriending %1 without '%select{struct|interface|union|class|enum}0' "
++   "keyword is incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def err_qualified_friend_no_match : Error<
++   "friend declaration of %0 does not match any declaration in %1">;
++ def err_introducing_special_friend : Error<
++   "%plural{[0,2]:must use a qualified name when declaring|3:cannot declare}0"
++   " a %select{constructor|destructor|conversion operator|deduction guide}0 "
++   "as a friend">;
++ def err_tagless_friend_type_template : Error<
++   "friend type templates must use an elaborated type">;
++ def err_no_matching_local_friend : Error<
++   "no matching function found in local scope">;
++ def err_no_matching_local_friend_suggest : Error<
++   "no matching function %0 found in local scope; did you mean %3?">;
++ def err_partial_specialization_friend : Error<
++   "partial specialization cannot be declared as a friend">;
++ def err_qualified_friend_def : Error<
++   "friend function definition cannot be qualified with '%0'">;
++ def err_friend_def_in_local_class : Error<
++   "friend function cannot be defined in a local class">;
++ def err_friend_not_first_in_declaration : Error<
++   "'friend' must appear first in a non-function declaration">;
++ def err_using_decl_friend : Error<
++   "cannot befriend target of using declaration">;
++ def warn_template_qualified_friend_unsupported : Warning<
++   "dependent nested name specifier '%0' for friend class declaration is "
++   "not supported; turning off access control for %1">,
++   InGroup<UnsupportedFriend>;
++ def warn_template_qualified_friend_ignored : Warning<
++   "dependent nested name specifier '%0' for friend template declaration is "
++   "not supported; ignoring this friend declaration">,
++   InGroup<UnsupportedFriend>;
++ def ext_friend_tag_redecl_outside_namespace : ExtWarn<
++   "unqualified friend declaration referring to type outside of the nearest "
++   "enclosing namespace is a Microsoft extension; add a nested name specifier">,
++   InGroup<MicrosoftUnqualifiedFriend>;
++ def err_pure_friend : Error<"friend declaration cannot have a pure-specifier">;
++ 
++ def err_invalid_base_in_interface : Error<
++   "interface type cannot inherit from "
++   "%select{struct|non-public interface|class}0 %1">;
++ 
++ def err_abstract_type_in_decl : Error<
++   "%select{return|parameter|variable|field|instance variable|"
++   "synthesized instance variable}0 type %1 is an abstract class">;
++ def err_allocation_of_abstract_type : Error<
++   "allocating an object of abstract class type %0">;
++ def err_throw_abstract_type : Error<
++   "cannot throw an object of abstract type %0">;
++ def err_array_of_abstract_type : Error<"array of abstract class type %0">;
++ def err_capture_of_abstract_type : Error<
++   "by-copy capture of value of abstract type %0">;
++ def err_capture_of_incomplete_or_sizeless_type : Error<
++   "by-copy capture of variable %0 with %select{incomplete|sizeless}1 type %2">;
++ def err_capture_default_non_local : Error<
++   "non-local lambda expression cannot have a capture-default">;
++ 
++ def err_multiple_final_overriders : Error<
++   "virtual function %q0 has more than one final overrider in %1">;
++ def note_final_overrider : Note<"final overrider of %q0 in %1">;
++ 
++ def err_type_defined_in_type_specifier : Error<
++   "%0 cannot be defined in a type specifier">;
++ def err_type_defined_in_result_type : Error<
++   "%0 cannot be defined in the result type of a function">;
++ def err_type_defined_in_param_type : Error<
++   "%0 cannot be defined in a parameter type">;
++ def err_type_defined_in_alias_template : Error<
++   "%0 cannot be defined in a type alias template">;
++ def err_type_defined_in_condition : Error<
++   "%0 cannot be defined in a condition">;
++ def err_type_defined_in_enum : Error<
++   "%0 cannot be defined in an enumeration">;
++ 
++ def note_pure_virtual_function : Note<
++   "unimplemented pure virtual method %0 in %1">;
++ 
++ def note_pure_qualified_call_kext : Note<
++   "qualified call to %0::%1 is treated as a virtual call to %1 due to -fapple-kext">;
++ 
++ def err_deleted_decl_not_first : Error<
++   "deleted definition must be first declaration">;
++ 
++ def err_deleted_override : Error<
++   "deleted function %0 cannot override a non-deleted function">;
++ def err_non_deleted_override : Error<
++   "non-deleted function %0 cannot override a deleted function">;
++ def err_consteval_override : Error<
++   "consteval function %0 cannot override a non-consteval function">;
++ def err_non_consteval_override : Error<
++   "non-consteval function %0 cannot override a consteval function">;
++ 
++ def warn_weak_vtable : Warning<
++   "%0 has no out-of-line virtual method definitions; its vtable will be "
++   "emitted in every translation unit">,
++   InGroup<DiagGroup<"weak-vtables">>, DefaultIgnore;
++ def warn_weak_template_vtable : Warning<
++   "explicit template instantiation %0 will emit a vtable in every "
++   "translation unit">,
++   InGroup<DiagGroup<"weak-template-vtables">>, DefaultIgnore;
++ 
++ def ext_using_undefined_std : ExtWarn<
++   "using directive refers to implicitly-defined namespace 'std'">;
++ 
++ // C++ exception specifications
++ def err_exception_spec_in_typedef : Error<
++   "exception specifications are not allowed in %select{typedefs|type aliases}0">;
++ def err_distant_exception_spec : Error<
++   "exception specifications are not allowed beyond a single level "
++   "of indirection">;
++ def err_incomplete_in_exception_spec : Error<
++   "%select{|pointer to |reference to }0incomplete type %1 is not allowed "
++   "in exception specification">;
++ def err_sizeless_in_exception_spec : Error<
++   "%select{|reference to }0sizeless type %1 is not allowed "
++   "in exception specification">;
++ def ext_incomplete_in_exception_spec : ExtWarn<err_incomplete_in_exception_spec.Text>,
++   InGroup<MicrosoftExceptionSpec>;
++ def err_rref_in_exception_spec : Error<
++   "rvalue reference type %0 is not allowed in exception specification">;
++ def err_mismatched_exception_spec : Error<
++   "exception specification in declaration does not match previous declaration">;
++ def ext_mismatched_exception_spec : ExtWarn<err_mismatched_exception_spec.Text>,
++   InGroup<MicrosoftExceptionSpec>;
++ def err_override_exception_spec : Error<
++   "exception specification of overriding function is more lax than "
++   "base version">;
++ def ext_override_exception_spec : ExtWarn<err_override_exception_spec.Text>,
++   InGroup<MicrosoftExceptionSpec>;
++ def err_incompatible_exception_specs : Error<
++   "target exception specification is not superset of source">;
++ def warn_incompatible_exception_specs : Warning<
++   err_incompatible_exception_specs.Text>, InGroup<IncompatibleExceptionSpec>;
++ def err_deep_exception_specs_differ : Error<
++   "exception specifications of %select{return|argument}0 types differ">;
++ def warn_deep_exception_specs_differ : Warning<
++   err_deep_exception_specs_differ.Text>, InGroup<IncompatibleExceptionSpec>;
++ def err_missing_exception_specification : Error<
++   "%0 is missing exception specification '%1'">;
++ def ext_missing_exception_specification : ExtWarn<
++   err_missing_exception_specification.Text>,
++   InGroup<DiagGroup<"missing-exception-spec">>;
++ def ext_ms_missing_exception_specification : ExtWarn<
++   err_missing_exception_specification.Text>,
++   InGroup<MicrosoftExceptionSpec>;
++ def err_noexcept_needs_constant_expression : Error<
++   "argument to noexcept specifier must be a constant expression">;
++ def err_exception_spec_not_parsed : Error<
++   "exception specification is not available until end of class definition">;
++ def err_exception_spec_cycle : Error<
++   "exception specification of %0 uses itself">;
++ def err_exception_spec_incomplete_type : Error<
++   "exception specification needed for member of incomplete class %0">;
++ def warn_wasm_dynamic_exception_spec_ignored : ExtWarn<
++   "dynamic exception specifications with types are currently ignored in wasm">,
++   InGroup<WebAssemblyExceptionSpec>;
++ 
++ // C++ access checking
++ def err_class_redeclared_with_different_access : Error<
++   "%0 redeclared with '%1' access">;
++ def err_access : Error<
++   "%1 is a %select{private|protected}0 member of %3">, AccessControl;
++ def ext_ms_using_declaration_inaccessible : ExtWarn<
++   "using declaration referring to inaccessible member '%0' (which refers "
++   "to accessible member '%1') is a Microsoft compatibility extension">,
++     AccessControl, InGroup<MicrosoftUsingDecl>;
++ def err_access_ctor : Error<
++   "calling a %select{private|protected}0 constructor of class %2">,
++   AccessControl;
++ def ext_rvalue_to_reference_access_ctor : Extension<
++   "C++98 requires an accessible copy constructor for class %2 when binding "
++   "a reference to a temporary; was %select{private|protected}0">,
++   AccessControl, InGroup<BindToTemporaryCopy>;
++ def err_access_base_ctor : Error<
++   // The ERRORs represent other special members that aren't constructors, in
++   // hopes that someone will bother noticing and reporting if they appear
++   "%select{base class|inherited virtual base class}0 %1 has %select{private|"
++   "protected}3 %select{default |copy |move |*ERROR* |*ERROR* "
++   "|*ERROR*|}2constructor">, AccessControl;
++ def err_access_field_ctor : Error<
++   // The ERRORs represent other special members that aren't constructors, in
++   // hopes that someone will bother noticing and reporting if they appear
++   "field of type %0 has %select{private|protected}2 "
++   "%select{default |copy |move |*ERROR* |*ERROR* |*ERROR* |}1constructor">,
++   AccessControl;
++ def err_access_friend_function : Error<
++   "friend function %1 is a %select{private|protected}0 member of %3">,
++   AccessControl;
++ 
++ def err_access_dtor : Error<
++   "calling a %select{private|protected}1 destructor of class %0">,
++   AccessControl;
++ def err_access_dtor_base :
++     Error<"base class %0 has %select{private|protected}1 destructor">,
++     AccessControl;
++ def err_access_dtor_vbase :
++     Error<"inherited virtual base class %1 has "
++     "%select{private|protected}2 destructor">,
++     AccessControl;
++ def err_access_dtor_temp :
++     Error<"temporary of type %0 has %select{private|protected}1 destructor">,
++     AccessControl;
++ def err_access_dtor_exception :
++     Error<"exception object of type %0 has %select{private|protected}1 "
++           "destructor">, AccessControl;
++ def err_access_dtor_field :
++     Error<"field of type %1 has %select{private|protected}2 destructor">,
++     AccessControl;
++ def err_access_dtor_var :
++     Error<"variable of type %1 has %select{private|protected}2 destructor">,
++     AccessControl;
++ def err_access_dtor_ivar :
++     Error<"instance variable of type %0 has %select{private|protected}1 "
++           "destructor">,
++     AccessControl;
++ def note_previous_access_declaration : Note<
++   "previously declared '%1' here">;
++ def note_access_natural : Note<
++   "%select{|implicitly }1declared %select{private|protected}0 here">;
++ def note_access_constrained_by_path : Note<
++   "constrained by %select{|implicitly }1%select{private|protected}0"
++   " inheritance here">;
++ def note_access_protected_restricted_noobject : Note<
++   "must name member using the type of the current context %0">;
++ def note_access_protected_restricted_ctordtor : Note<
++   "protected %select{constructor|destructor}0 can only be used to "
++   "%select{construct|destroy}0 a base class subobject">;
++ def note_access_protected_restricted_object : Note<
++   "can only access this member on an object of type %0">;
++ def warn_cxx98_compat_sfinae_access_control : Warning<
++   "substitution failure due to access control is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore, NoSFINAE;
++ 
++ // C++ name lookup
++ def err_incomplete_nested_name_spec : Error<
++   "incomplete type %0 named in nested name specifier">;
++ def err_incomplete_enum : Error<
++   "enumeration %0 is incomplete">;
++ def err_dependent_nested_name_spec : Error<
++   "nested name specifier for a declaration cannot depend on a template "
++   "parameter">;
++ def err_nested_name_member_ref_lookup_ambiguous : Error<
++   "lookup of %0 in member access expression is ambiguous">;
++ def ext_nested_name_member_ref_lookup_ambiguous : ExtWarn<
++   "lookup of %0 in member access expression is ambiguous; using member of %1">,
++   InGroup<AmbigMemberTemplate>;
++ def note_ambig_member_ref_object_type : Note<
++   "lookup in the object type %0 refers here">;
++ def note_ambig_member_ref_scope : Note<
++   "lookup from the current scope refers here">;
++ def err_qualified_member_nonclass : Error<
++   "qualified member access refers to a member in %0">;
++ def err_incomplete_member_access : Error<
++   "member access into incomplete type %0">;
++ def err_incomplete_type : Error<
++   "incomplete type %0 where a complete type is required">;
++ def warn_cxx98_compat_enum_nested_name_spec : Warning<
++   "enumeration type in nested name specifier is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_nested_name_spec_is_not_class : Error<
++   "%0 cannot appear before '::' because it is not a class"
++   "%select{ or namespace|, namespace, or enumeration}1; did you mean ':'?">;
++ def ext_nested_name_spec_is_enum : ExtWarn<
++   "use of enumeration in a nested name specifier is a C++11 extension">,
++   InGroup<CXX11>;
++ def err_out_of_line_qualified_id_type_names_constructor : Error<
++   "qualified reference to %0 is a constructor name rather than a "
++   "%select{template name|type}1 in this context">;
++ def ext_out_of_line_qualified_id_type_names_constructor : ExtWarn<
++   "ISO C++ specifies that "
++   "qualified reference to %0 is a constructor name rather than a "
++   "%select{template name|type}1 in this context, despite preceding "
++   "%select{'typename'|'template'}2 keyword">, SFINAEFailure,
++   InGroup<DiagGroup<"injected-class-name">>;
++ 
++ // C++ class members
++ def err_storageclass_invalid_for_member : Error<
++   "storage class specified for a member declaration">;
++ def err_mutable_function : Error<"'mutable' cannot be applied to functions">;
++ def err_mutable_reference : Error<"'mutable' cannot be applied to references">;
++ def ext_mutable_reference : ExtWarn<
++   "'mutable' on a reference type is a Microsoft extension">,
++   InGroup<MicrosoftMutableReference>;
++ def err_mutable_const : Error<"'mutable' and 'const' cannot be mixed">;
++ def err_mutable_nonmember : Error<
++   "'mutable' can only be applied to member variables">;
++ def err_virtual_in_union : Error<
++   "unions cannot have virtual functions">;
++ def err_virtual_non_function : Error<
++   "'virtual' can only appear on non-static member functions">;
++ def err_virtual_out_of_class : Error<
++   "'virtual' can only be specified inside the class definition">;
++ def err_virtual_member_function_template : Error<
++   "'virtual' cannot be specified on member function templates">;
++ def err_static_overrides_virtual : Error<
++   "'static' member function %0 overrides a virtual function in a base class">;
++ def err_explicit_non_function : Error<
++   "'explicit' can only appear on non-static member functions">;
++ def err_explicit_out_of_class : Error<
++   "'explicit' can only be specified inside the class definition">;
++ def err_explicit_non_ctor_or_conv_function : Error<
++   "'explicit' can only be applied to a constructor or conversion function">;
++ def err_static_not_bitfield : Error<"static member %0 cannot be a bit-field">;
++ def err_static_out_of_line : Error<
++   "'static' can only be specified inside the class definition">;
++ def ext_static_out_of_line : ExtWarn<
++   err_static_out_of_line.Text>,
++   InGroup<MicrosoftTemplate>;
++ def err_storage_class_for_static_member : Error<
++   "static data member definition cannot specify a storage class">;
++ def err_typedef_not_bitfield : Error<"typedef member %0 cannot be a bit-field">;
++ def err_not_integral_type_bitfield : Error<
++   "bit-field %0 has non-integral type %1">;
++ def err_not_integral_type_anon_bitfield : Error<
++   "anonymous bit-field has non-integral type %0">;
++ def err_anon_bitfield_qualifiers : Error<
++   "anonymous bit-field cannot have qualifiers">;
++ def err_member_function_initialization : Error<
++   "initializer on function does not look like a pure-specifier">;
++ def err_non_virtual_pure : Error<
++   "%0 is not virtual and cannot be declared pure">;
++ def ext_pure_function_definition : ExtWarn<
++   "function definition with pure-specifier is a Microsoft extension">,
++   InGroup<MicrosoftPureDefinition>;
++ def err_qualified_member_of_unrelated : Error<
++   "%q0 is not a member of class %1">;
++ 
++ def err_member_function_call_bad_cvr : Error<
++   "'this' argument to member function %0 has type %1, but function is not marked "
++   "%select{const|restrict|const or restrict|volatile|const or volatile|"
++   "volatile or restrict|const, volatile, or restrict}2">;
++ def err_member_function_call_bad_ref : Error<
++   "'this' argument to member function %0 is an %select{lvalue|rvalue}1, "
++   "but function has %select{non-const lvalue|rvalue}2 ref-qualifier">;
++ def err_member_function_call_bad_type : Error<
++   "cannot initialize object parameter of type %0 with an expression "
++   "of type %1">;
++ 
++ def warn_call_to_pure_virtual_member_function_from_ctor_dtor : Warning<
++   "call to pure virtual member function %0 has undefined behavior; "
++   "overrides of %0 in subclasses are not available in the "
++   "%select{constructor|destructor}1 of %2">, InGroup<PureVirtualCallFromCtorDtor>;
++ 
++ def select_special_member_kind : TextSubstitution<
++   "%select{default constructor|copy constructor|move constructor|"
++   "copy assignment operator|move assignment operator|destructor}0">;
++ 
++ def note_member_declared_at : Note<"member is declared here">;
++ def note_ivar_decl : Note<"instance variable is declared here">;
++ def note_bitfield_decl : Note<"bit-field is declared here">;
++ def note_implicit_param_decl : Note<"%0 is an implicit parameter">;
++ def note_member_synthesized_at : Note<
++   "in %select{implicit|defaulted}0 %sub{select_special_member_kind}1 for %2 "
++   "first required here">;
++ def note_comparison_synthesized_at : Note<
++   "in defaulted %sub{select_defaulted_comparison_kind}0 for %1 "
++   "first required here">;
++ def err_missing_default_ctor : Error<
++   "%select{constructor for %1 must explicitly initialize the|"
++   "implicit default constructor for %1 must explicitly initialize the|"
++   "cannot use constructor inherited from base class %4;}0 "
++   "%select{base class|member}2 %3 %select{which|which|of %1}0 "
++   "does not have a default constructor">;
++ def note_due_to_dllexported_class : Note<
++   "due to %0 being dllexported%select{|; try compiling in C++11 mode}1">;
++ 
++ def err_illegal_union_or_anon_struct_member : Error<
++   "%select{anonymous struct|union}0 member %1 has a non-trivial "
++   "%sub{select_special_member_kind}2">;
++ 
++ def warn_frame_address : Warning<
++   "calling '%0' with a nonzero argument is unsafe">,
++   InGroup<FrameAddress>, DefaultIgnore;
++ 
++ def warn_cxx98_compat_nontrivial_union_or_anon_struct_member : Warning<
++   "%select{anonymous struct|union}0 member %1 with a non-trivial "
++   "%sub{select_special_member_kind}2 is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ 
++ def note_nontrivial_virtual_dtor : Note<
++   "destructor for %0 is not trivial because it is virtual">;
++ def note_nontrivial_has_virtual : Note<
++   "because type %0 has a virtual %select{member function|base class}1">;
++ def note_nontrivial_no_def_ctor : Note<
++   "because %select{base class of |field of |}0type %1 has no "
++   "default constructor">;
++ def note_user_declared_ctor : Note<
++   "implicit default constructor suppressed by user-declared constructor">;
++ def note_nontrivial_no_copy : Note<
++   "because no %select{<<ERROR>>|constructor|constructor|assignment operator|"
++   "assignment operator|<<ERROR>>}2 can be used to "
++   "%select{<<ERROR>>|copy|move|copy|move|<<ERROR>>}2 "
++   "%select{base class|field|an object}0 of type %3">;
++ def note_nontrivial_user_provided : Note<
++   "because %select{base class of |field of |}0type %1 has a user-provided "
++   "%sub{select_special_member_kind}2">;
++ def note_nontrivial_default_member_init : Note<
++   "because field %0 has an initializer">;
++ def note_nontrivial_param_type : Note<
++   "because its parameter is %diff{of type $, not $|of the wrong type}2,3">;
++ def note_nontrivial_default_arg : Note<"because it has a default argument">;
++ def note_nontrivial_variadic : Note<"because it is a variadic function">;
++ def note_nontrivial_subobject : Note<
++   "because the function selected to %select{construct|copy|move|copy|move|"
++   "destroy}2 %select{base class|field}0 of type %1 is not trivial">;
++ def note_nontrivial_objc_ownership : Note<
++   "because type %0 has a member with %select{no|no|__strong|__weak|"
++   "__autoreleasing}1 ownership">;
++ 
++ /// Selector for a TagTypeKind value.
++ def select_tag_type_kind : TextSubstitution<
++   "%select{struct|interface|union|class|enum}0">;
++ 
++ def err_static_data_member_not_allowed_in_anon_struct : Error<
++   "static data member %0 not allowed in anonymous "
++   "%sub{select_tag_type_kind}1">;
++ def ext_static_data_member_in_union : ExtWarn<
++   "static data member %0 in union is a C++11 extension">, InGroup<CXX11>;
++ def warn_cxx98_compat_static_data_member_in_union : Warning<
++   "static data member %0 in union is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def ext_union_member_of_reference_type : ExtWarn<
++   "union member %0 has reference type %1, which is a Microsoft extension">,
++   InGroup<MicrosoftUnionMemberReference>;
++ def err_union_member_of_reference_type : Error<
++   "union member %0 has reference type %1">;
++ def ext_anonymous_struct_union_qualified : Extension<
++   "anonymous %select{struct|union}0 cannot be '%1'">;
++ def err_different_return_type_for_overriding_virtual_function : Error<
++   "virtual function %0 has a different return type "
++   "%diff{($) than the function it overrides (which has return type $)|"
++   "than the function it overrides}1,2">;
++ def note_overridden_virtual_function : Note<
++   "overridden virtual function is here">;
++ def err_conflicting_overriding_cc_attributes : Error<
++   "virtual function %0 has different calling convention attributes "
++   "%diff{($) than the function it overrides (which has calling convention $)|"
++   "than the function it overrides}1,2">;
++ def warn_overriding_method_missing_noescape : Warning<
++   "parameter of overriding method should be annotated with "
++   "__attribute__((noescape))">, InGroup<MissingNoEscape>;
++ def note_overridden_marked_noescape : Note<
++   "parameter of overridden method is annotated with __attribute__((noescape))">;
++ def note_cat_conform_to_noescape_prot : Note<
++   "%select{category|class extension}0 conforms to protocol %1 which defines method %2">;
++ 
++ def err_covariant_return_inaccessible_base : Error<
++   "invalid covariant return for virtual function: %1 is a "
++   "%select{private|protected}2 base class of %0">, AccessControl;
++ def err_covariant_return_ambiguous_derived_to_base_conv : Error<
++   "return type of virtual function %3 is not covariant with the return type of "
++   "the function it overrides (ambiguous conversion from derived class "
++   "%0 to base class %1:%2)">;
++ def err_covariant_return_not_derived : Error<
++   "return type of virtual function %0 is not covariant with the return type of "
++   "the function it overrides (%1 is not derived from %2)">;
++ def err_covariant_return_incomplete : Error<
++   "return type of virtual function %0 is not covariant with the return type of "
++   "the function it overrides (%1 is incomplete)">;
++ def err_covariant_return_type_different_qualifications : Error<
++   "return type of virtual function %0 is not covariant with the return type of "
++   "the function it overrides (%1 has different qualifiers than %2)">;
++ def err_covariant_return_type_class_type_more_qualified : Error<
++   "return type of virtual function %0 is not covariant with the return type of "
++   "the function it overrides (class type %1 is more qualified than class "
++   "type %2">;
++ 
++ // C++ implicit special member functions
++ def note_in_declaration_of_implicit_special_member : Note<
++   "while declaring the implicit %sub{select_special_member_kind}1"
++   " for %0">;
++ 
++ // C++ constructors
++ def err_constructor_cannot_be : Error<"constructor cannot be declared '%0'">;
++ def err_invalid_qualified_constructor : Error<
++   "'%0' qualifier is not allowed on a constructor">;
++ def err_ref_qualifier_constructor : Error<
++   "ref-qualifier '%select{&&|&}0' is not allowed on a constructor">;
++ 
++ def err_constructor_return_type : Error<
++   "constructor cannot have a return type">;
++ def err_constructor_redeclared : Error<"constructor cannot be redeclared">;
++ def err_constructor_byvalue_arg : Error<
++   "copy constructor must pass its first argument by reference">;
++ def warn_no_constructor_for_refconst : Warning<
++   "%select{struct|interface|union|class|enum}0 %1 does not declare any "
++   "constructor to initialize its non-modifiable members">;
++ def note_refconst_member_not_initialized : Note<
++   "%select{const|reference}0 member %1 will never be initialized">;
++ def ext_ms_explicit_constructor_call : ExtWarn<
++   "explicit constructor calls are a Microsoft extension">,
++   InGroup<MicrosoftExplicitConstructorCall>;
++ 
++ // C++ destructors
++ def err_destructor_not_member : Error<
++   "destructor must be a non-static member function">;
++ def err_destructor_cannot_be : Error<"destructor cannot be declared '%0'">;
++ def err_invalid_qualified_destructor : Error<
++   "'%0' qualifier is not allowed on a destructor">;
++ def err_ref_qualifier_destructor : Error<
++   "ref-qualifier '%select{&&|&}0' is not allowed on a destructor">;
++ def err_destructor_return_type : Error<"destructor cannot have a return type">;
++ def err_destructor_redeclared : Error<"destructor cannot be redeclared">;
++ def err_destructor_with_params : Error<"destructor cannot have any parameters">;
++ def err_destructor_variadic : Error<"destructor cannot be variadic">;
++ def ext_destructor_typedef_name : ExtWarn<
++   "destructor cannot be declared using a %select{typedef|type alias}1 %0 "
++   "of the class name">, DefaultError, InGroup<DiagGroup<"dtor-typedef">>;
++ def err_undeclared_destructor_name : Error<
++   "undeclared identifier %0 in destructor name">;
++ def err_destructor_name : Error<
++   "expected the class name after '~' to name the enclosing class">;
++ def err_destructor_name_nontype : Error<
++   "identifier %0 after '~' in destructor name does not name a type">;
++ def err_destructor_expr_mismatch : Error<
++   "identifier %0 in object destruction expression does not name the type "
++   "%1 of the object being destroyed">;
++ def err_destructor_expr_nontype : Error<
++   "identifier %0 in object destruction expression does not name a type">;
++ def err_destructor_expr_type_mismatch : Error<
++   "destructor type %0 in object destruction expression does not match the "
++   "type %1 of the object being destroyed">;
++ def note_destructor_type_here : Note<
++   "type %0 found by destructor name lookup">;
++ def note_destructor_nontype_here : Note<
++   "non-type declaration found by destructor name lookup">;
++ def ext_dtor_named_in_wrong_scope : Extension<
++   "ISO C++ requires the name after '::~' to be found in the same scope as "
++   "the name before '::~'">, InGroup<DtorName>;
++ def ext_qualified_dtor_named_in_lexical_scope : ExtWarn<
++   "qualified destructor name only found in lexical scope; omit the qualifier "
++   "to find this type name by unqualified lookup">, InGroup<DtorName>;
++ def ext_dtor_name_ambiguous : Extension<
++   "ISO C++ considers this destructor name lookup to be ambiguous">,
++   InGroup<DtorName>;
++ 
++ def err_destroy_attr_on_non_static_var : Error<
++   "%select{no_destroy|always_destroy}0 attribute can only be applied to a"
++   " variable with static or thread storage duration">;
++ 
++ def err_destructor_template : Error<
++   "destructor cannot be declared as a template">;
++ 
++ // C++ initialization
++ def err_init_conversion_failed : Error<
++   "cannot initialize %select{a variable|a parameter|template parameter|"
++   "return object|statement expression result|an "
++   "exception object|a member subobject|an array element|a new value|a value|a "
++   "base class|a constructor delegation|a vector element|a block element|a "
++   "block element|a complex element|a lambda capture|a compound literal "
++   "initializer|a related result|a parameter of CF audited function}0 "
++   "%diff{of type $ with an %select{rvalue|lvalue}2 of type $|"
++   "with an %select{rvalue|lvalue}2 of incompatible type}1,3"
++   "%select{|: different classes%diff{ ($ vs $)|}5,6"
++   "|: different number of parameters (%5 vs %6)"
++   "|: type mismatch at %ordinal5 parameter%diff{ ($ vs $)|}6,7"
++   "|: different return type%diff{ ($ vs $)|}5,6"
++   "|: different qualifiers (%5 vs %6)"
++   "|: different exception specifications}4">;
++ def note_forward_class_conversion : Note<"%0 is not defined, but forward "
++   "declared here; conversion would be valid if it was derived from %1">;
++ 
++ def err_lvalue_to_rvalue_ref : Error<"rvalue reference %diff{to type $ cannot "
++   "bind to lvalue of type $|cannot bind to incompatible lvalue}0,1">;
++ def err_lvalue_reference_bind_to_initlist : Error<
++   "%select{non-const|volatile}0 lvalue reference to type %1 cannot bind to an "
++   "initializer list temporary">;
++ def err_lvalue_reference_bind_to_temporary : Error<
++   "%select{non-const|volatile}0 lvalue reference %diff{to type $ cannot bind "
++   "to a temporary of type $|cannot bind to incompatible temporary}1,2">;
++ def err_lvalue_reference_bind_to_unrelated : Error<
++   "%select{non-const|volatile}0 lvalue reference "
++   "%diff{to type $ cannot bind to a value of unrelated type $|"
++   "cannot bind to a value of unrelated type}1,2">;
++ def err_reference_bind_drops_quals : Error<
++   "binding reference %diff{of type $ to value of type $|to value}0,1 "
++   "%select{drops %3 qualifier%plural{1:|2:|4:|:s}4|changes address space|"
++   "not permitted due to incompatible qualifiers}2">;
++ def err_reference_bind_failed : Error<
++   "reference %diff{to %select{type|incomplete type}1 $ could not bind to an "
++   "%select{rvalue|lvalue}2 of type $|could not bind to %select{rvalue|lvalue}2 of "
++   "incompatible type}0,3">;
++ def err_reference_bind_temporary_addrspace : Error<
++   "reference of type %0 cannot bind to a temporary object because of "
++   "address space mismatch">;
++ def err_reference_bind_init_list : Error<
++   "reference to type %0 cannot bind to an initializer list">;
++ def err_init_list_bad_dest_type : Error<
++   "%select{|non-aggregate }0type %1 cannot be initialized with an initializer "
++   "list">;
++ def warn_cxx20_compat_aggregate_init_with_ctors : Warning<
++   "aggregate initialization of type %0 with user-declared constructors "
++   "is incompatible with C++20">, DefaultIgnore, InGroup<CXX20Compat>;
++ 
++ def err_reference_bind_to_bitfield : Error<
++   "%select{non-const|volatile}0 reference cannot bind to "
++   "bit-field%select{| %1}2">;
++ def err_reference_bind_to_vector_element : Error<
++   "%select{non-const|volatile}0 reference cannot bind to vector element">;
++ def err_reference_bind_to_matrix_element : Error<
++   "%select{non-const|volatile}0 reference cannot bind to matrix element">;
++ def err_reference_var_requires_init : Error<
++   "declaration of reference variable %0 requires an initializer">;
++ def err_reference_without_init : Error<
++   "reference to type %0 requires an initializer">;
++ def note_value_initialization_here : Note<
++   "in value-initialization of type %0 here">;
++ def err_reference_has_multiple_inits : Error<
++   "reference cannot be initialized with multiple values">;
++ def err_init_non_aggr_init_list : Error<
++   "initialization of non-aggregate type %0 with an initializer list">;
++ def err_init_reference_member_uninitialized : Error<
++   "reference member of type %0 uninitialized">;
++ def note_uninit_reference_member : Note<
++   "uninitialized reference member is here">;
++ def warn_field_is_uninit : Warning<"field %0 is uninitialized when used here">,
++   InGroup<Uninitialized>;
++ def warn_base_class_is_uninit : Warning<
++   "base class %0 is uninitialized when used here to access %q1">,
++   InGroup<Uninitialized>;
++ def warn_reference_field_is_uninit : Warning<
++   "reference %0 is not yet bound to a value when used here">,
++   InGroup<Uninitialized>;
++ def note_uninit_in_this_constructor : Note<
++   "during field initialization in %select{this|the implicit default}0 "
++   "constructor">;
++ def warn_static_self_reference_in_init : Warning<
++   "static variable %0 is suspiciously used within its own initialization">,
++   InGroup<UninitializedStaticSelfInit>;
++ def warn_uninit_self_reference_in_init : Warning<
++   "variable %0 is uninitialized when used within its own initialization">,
++   InGroup<Uninitialized>;
++ def warn_uninit_self_reference_in_reference_init : Warning<
++   "reference %0 is not yet bound to a value when used within its own"
++   " initialization">,
++   InGroup<Uninitialized>;
++ def warn_uninit_var : Warning<
++   "variable %0 is uninitialized when %select{used here|captured by block}1">,
++   InGroup<Uninitialized>, DefaultIgnore;
++ def warn_sometimes_uninit_var : Warning<
++   "variable %0 is %select{used|captured}1 uninitialized whenever "
++   "%select{'%3' condition is %select{true|false}4|"
++   "'%3' loop %select{is entered|exits because its condition is false}4|"
++   "'%3' loop %select{condition is true|exits because its condition is false}4|"
++   "switch %3 is taken|"
++   "its declaration is reached|"
++   "%3 is called}2">,
++   InGroup<UninitializedSometimes>, DefaultIgnore;
++ def warn_maybe_uninit_var : Warning<
++   "variable %0 may be uninitialized when "
++   "%select{used here|captured by block}1">,
++   InGroup<UninitializedMaybe>, DefaultIgnore;
++ def note_var_declared_here : Note<"variable %0 is declared here">;
++ def note_uninit_var_use : Note<
++   "%select{uninitialized use occurs|variable is captured by block}0 here">;
++ def warn_uninit_byref_blockvar_captured_by_block : Warning<
++   "block pointer variable %0 is %select{uninitialized|null}1 when captured by "
++   "block">, InGroup<Uninitialized>, DefaultIgnore;
++ def note_block_var_fixit_add_initialization : Note<
++   "did you mean to use __block %0?">;
++ def note_in_omitted_aggregate_initializer : Note<
++   "in implicit initialization of %select{"
++   "array element %1 with omitted initializer|"
++   "field %1 with omitted initializer|"
++   "trailing array elements in runtime-sized array new}0">;
++ def note_in_reference_temporary_list_initializer : Note<
++   "in initialization of temporary of type %0 created to "
++   "list-initialize this reference">;
++ def note_var_fixit_add_initialization : Note<
++   "initialize the variable %0 to silence this warning">;
++ def note_uninit_fixit_remove_cond : Note<
++   "remove the %select{'%1' if its condition|condition if it}0 "
++   "is always %select{false|true}2">;
++ def err_init_incomplete_type : Error<"initialization of incomplete type %0">;
++ def err_list_init_in_parens : Error<
++   "cannot initialize %select{non-class|reference}0 type %1 with a "
++   "parenthesized initializer list">;
++ 
++ def warn_uninit_const_reference : Warning<
++   "variable %0 is uninitialized when passed as a const reference argument "
++   "here">, InGroup<UninitializedConstReference>, DefaultIgnore;
++ 
++ def warn_unsequenced_mod_mod : Warning<
++   "multiple unsequenced modifications to %0">, InGroup<Unsequenced>;
++ def warn_unsequenced_mod_use : Warning<
++   "unsequenced modification and access to %0">, InGroup<Unsequenced>;
++ 
++ def select_initialized_entity_kind : TextSubstitution<
++   "%select{copying variable|copying parameter|initializing template parameter|"
++   "returning object|initializing statement expression result|"
++   "throwing object|copying member subobject|copying array element|"
++   "allocating object|copying temporary|initializing base subobject|"
++   "initializing vector element|capturing value}0">;
++ 
++ def err_temp_copy_no_viable : Error<
++   "no viable constructor %sub{select_initialized_entity_kind}0 of type %1">;
++ def ext_rvalue_to_reference_temp_copy_no_viable : Extension<
++   "no viable constructor %sub{select_initialized_entity_kind}0 of type %1; "
++   "C++98 requires a copy constructor when binding a reference to a temporary">,
++   InGroup<BindToTemporaryCopy>;
++ def err_temp_copy_ambiguous : Error<
++   "ambiguous constructor call when %sub{select_initialized_entity_kind}0 "
++   "of type %1">;
++ def err_temp_copy_deleted : Error<
++   "%sub{select_initialized_entity_kind}0 of type %1 "
++   "invokes deleted constructor">;
++ def err_temp_copy_incomplete : Error<
++   "copying a temporary object of incomplete type %0">;
++ def warn_cxx98_compat_temp_copy : Warning<
++   "%sub{select_initialized_entity_kind}1 "
++   "of type %2 when binding a reference to a temporary would %select{invoke "
++   "an inaccessible constructor|find no viable constructor|find ambiguous "
++   "constructors|invoke a deleted constructor}0 in C++98">,
++   InGroup<CXX98CompatBindToTemporaryCopy>, DefaultIgnore;
++ def err_selected_explicit_constructor : Error<
++   "chosen constructor is explicit in copy-initialization">;
++ def note_explicit_ctor_deduction_guide_here : Note<
++   "explicit %select{constructor|deduction guide}0 declared here">;
++ 
++ // C++11 decltype
++ def err_decltype_in_declarator : Error<
++     "'decltype' cannot be used to name a declaration">;
++ 
++ // C++11 auto
++ def warn_cxx98_compat_auto_type_specifier : Warning<
++   "'auto' type specifier is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_auto_variable_cannot_appear_in_own_initializer : Error<
++   "variable %0 declared with deduced type %1 "
++   "cannot appear in its own initializer">;
++ def err_binding_cannot_appear_in_own_initializer : Error<
++   "binding %0 cannot appear in the initializer of its own "
++   "decomposition declaration">;
++ def err_illegal_decl_array_of_auto : Error<
++   "'%0' declared as array of %1">;
++ def err_new_array_of_auto : Error<
++   "cannot allocate array of 'auto'">;
++ def err_auto_not_allowed : Error<
++   "%select{'auto'|'decltype(auto)'|'__auto_type'|"
++   "use of "
++   "%select{class template|function template|variable template|alias template|"
++   "template template parameter|concept|template}2 %3 requires template "
++   "arguments; argument deduction}0 not allowed "
++   "%select{in function prototype"
++   "|in non-static struct member|in struct member"
++   "|in non-static union member|in union member"
++   "|in non-static class member|in interface member"
++   "|in exception declaration|in template parameter until C++17|in block literal"
++   "|in template argument|in typedef|in type alias|in function return type"
++   "|in conversion function type|here|in lambda parameter"
++   "|in type allocated by 'new'|in K&R-style function parameter"
++   "|in template parameter|in friend declaration|in function prototype that is "
++   "not a function declaration|in requires expression parameter}1">;
++ def err_dependent_deduced_tst : Error<
++   "typename specifier refers to "
++   "%select{class template|function template|variable template|alias template|"
++   "template template parameter|template}0 member in %1; "
++   "argument deduction not allowed here">;
++ def err_deduced_tst : Error<
++   "typename specifier refers to "
++   "%select{class template|function template|variable template|alias template|"
++   "template template parameter|template}0; argument deduction not allowed "
++   "here">;
++ def err_auto_not_allowed_var_inst : Error<
++   "'auto' variable template instantiation is not allowed">;
++ def err_auto_var_requires_init : Error<
++   "declaration of variable %0 with deduced type %1 requires an initializer">;
++ def err_auto_new_requires_ctor_arg : Error<
++   "new expression for type %0 requires a constructor argument">;
++ def ext_auto_new_list_init : Extension<
++   "ISO C++ standards before C++17 do not allow new expression for "
++   "type %0 to use list-initialization">, InGroup<CXX17>;
++ def err_auto_var_init_no_expression : Error<
++   "initializer for variable %0 with type %1 is empty">;
++ def err_auto_var_init_multiple_expressions : Error<
++   "initializer for variable %0 with type %1 contains multiple expressions">;
++ def err_auto_var_init_paren_braces : Error<
++   "cannot deduce type for variable %1 with type %2 from "
++   "%select{parenthesized|nested}0 initializer list">;
++ def err_auto_new_ctor_multiple_expressions : Error<
++   "new expression for type %0 contains multiple constructor arguments">;
++ def err_auto_missing_trailing_return : Error<
++   "'auto' return without trailing return type; deduced return types are a "
++   "C++14 extension">;
++ def err_deduced_return_type : Error<
++   "deduced return types are a C++14 extension">;
++ def err_trailing_return_without_auto : Error<
++   "function with trailing return type must specify return type 'auto', not %0">;
++ def err_trailing_return_in_parens : Error<
++   "trailing return type may not be nested within parentheses">;
++ def err_auto_var_deduction_failure : Error<
++   "variable %0 with type %1 has incompatible initializer of type %2">;
++ def err_auto_var_deduction_failure_from_init_list : Error<
++   "cannot deduce actual type for variable %0 with type %1 from initializer list">;
++ def err_auto_new_deduction_failure : Error<
++   "new expression for type %0 has incompatible constructor argument of type %1">;
++ def err_auto_inconsistent_deduction : Error<
++   "deduced conflicting types %diff{($ vs $) |}0,1"
++   "for initializer list element type">;
++ def err_auto_different_deductions : Error<
++   "%select{'auto'|'decltype(auto)'|'__auto_type'|template arguments}0 "
++   "deduced as %1 in declaration of %2 and "
++   "deduced as %3 in declaration of %4">;
++ def err_auto_non_deduced_not_alone : Error<
++   "%select{function with deduced return type|"
++   "declaration with trailing return type}0 "
++   "must be the only declaration in its group">;
++ def err_implied_std_initializer_list_not_found : Error<
++   "cannot deduce type of initializer list because std::initializer_list was "
++   "not found; include <initializer_list>">;
++ def err_malformed_std_initializer_list : Error<
++   "std::initializer_list must be a class template with a single type parameter">;
++ def err_auto_init_list_from_c : Error<
++   "cannot use __auto_type with initializer list in C">;
++ def err_auto_bitfield : Error<
++   "cannot pass bit-field as __auto_type initializer in C">;
++ 
++ // C++1y decltype(auto) type
++ def err_decltype_auto_invalid : Error<
++   "'decltype(auto)' not allowed here">;
++ def err_decltype_auto_cannot_be_combined : Error<
++   "'decltype(auto)' cannot be combined with other type specifiers">;
++ def err_decltype_auto_function_declarator_not_declaration : Error<
++   "'decltype(auto)' can only be used as a return type "
++   "in a function declaration">;
++ def err_decltype_auto_compound_type : Error<
++   "cannot form %select{pointer to|reference to|array of}0 'decltype(auto)'">;
++ def err_decltype_auto_initializer_list : Error<
++   "cannot deduce 'decltype(auto)' from initializer list">;
++ 
++ // C++17 deduced class template specialization types
++ def err_deduced_class_template_compound_type : Error<
++   "cannot %select{form pointer to|form reference to|form array of|"
++   "form function returning|use parentheses when declaring variable with}0 "
++   "deduced class template specialization type">;
++ def err_deduced_non_class_template_specialization_type : Error<
++   "%select{<error>|function template|variable template|alias template|"
++   "template template parameter|concept|template}0 %1 requires template "
++   "arguments; argument deduction only allowed for class templates">;
++ def err_deduced_class_template_ctor_ambiguous : Error<
++   "ambiguous deduction for template arguments of %0">;
++ def err_deduced_class_template_ctor_no_viable : Error<
++   "no viable constructor or deduction guide for deduction of "
++   "template arguments of %0">;
++ def err_deduced_class_template_incomplete : Error<
++   "template %0 has no definition and no %select{|viable }1deduction guides "
++   "for deduction of template arguments">;
++ def err_deduced_class_template_deleted : Error<
++   "class template argument deduction for %0 selected a deleted constructor">;
++ def err_deduced_class_template_explicit : Error<
++   "class template argument deduction for %0 selected an explicit "
++   "%select{constructor|deduction guide}1 for copy-list-initialization">;
++ def err_deduction_guide_no_trailing_return_type : Error<
++   "deduction guide declaration without trailing return type">;
++ def err_deduction_guide_bad_trailing_return_type : Error<
++   "deduced type %1 of deduction guide is not %select{|written as }2"
++   "a specialization of template %0">;
++ def err_deduction_guide_with_complex_decl : Error<
++   "cannot specify any part of a return type in the "
++   "declaration of a deduction guide">;
++ def err_deduction_guide_invalid_specifier : Error<
++   "deduction guide cannot be declared '%0'">;
++ def err_deduction_guide_name_not_class_template : Error<
++   "cannot specify deduction guide for "
++   "%select{<error>|function template|variable template|alias template|"
++   "template template parameter|concept|dependent template name}0 %1">;
++ def err_deduction_guide_wrong_scope : Error<
++   "deduction guide must be declared in the same scope as template %q0">;
++ def err_deduction_guide_defines_function : Error<
++   "deduction guide cannot have a function definition">;
++ def err_deduction_guide_redeclared : Error<
++   "redeclaration of deduction guide">;
++ def err_deduction_guide_specialized : Error<"deduction guide cannot be "
++   "%select{explicitly instantiated|explicitly specialized}0">;
++ def err_deduction_guide_template_not_deducible : Error<
++   "deduction guide template contains "
++   "%select{a template parameter|template parameters}0 that cannot be "
++   "deduced">;
++ def err_deduction_guide_wrong_access : Error<
++   "deduction guide has different access from the corresponding "
++   "member template">;
++ def note_deduction_guide_template_access : Note<
++   "member template declared %0 here">;
++ def note_deduction_guide_access : Note<
++   "deduction guide declared %0 by intervening access specifier">;
++ def warn_cxx14_compat_class_template_argument_deduction : Warning<
++   "class template argument deduction is incompatible with C++ standards "
++   "before C++17%select{|; for compatibility, use explicit type name %1}0">,
++   InGroup<CXXPre17Compat>, DefaultIgnore;
++ def warn_ctad_maybe_unsupported : Warning<
++   "%0 may not intend to support class template argument deduction">,
++   InGroup<CTADMaybeUnsupported>, DefaultIgnore;
++ def note_suppress_ctad_maybe_unsupported : Note<
++   "add a deduction guide to suppress this warning">;
++ 
++ 
++ // C++14 deduced return types
++ def err_auto_fn_deduction_failure : Error<
++   "cannot deduce return type %0 from returned value of type %1">;
++ def err_auto_fn_different_deductions : Error<
++   "'%select{auto|decltype(auto)}0' in return type deduced as %1 here but "
++   "deduced as %2 in earlier return statement">;
++ def err_auto_fn_used_before_defined : Error<
++   "function %0 with deduced return type cannot be used before it is defined">;
++ def err_auto_fn_no_return_but_not_auto : Error<
++   "cannot deduce return type %0 for function with no return statements">;
++ def err_auto_fn_return_void_but_not_auto : Error<
++   "cannot deduce return type %0 from omitted return expression">;
++ def err_auto_fn_return_init_list : Error<
++   "cannot deduce return type from initializer list">;
++ def err_auto_fn_virtual : Error<
++   "function with deduced return type cannot be virtual">;
++ def warn_cxx11_compat_deduced_return_type : Warning<
++   "return type deduction is incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ 
++ // C++11 override control
++ def override_keyword_only_allowed_on_virtual_member_functions : Error<
++   "only virtual member functions can be marked '%0'">;
++ def override_keyword_hides_virtual_member_function : Error<
++   "non-virtual member function marked '%0' hides virtual member "
++   "%select{function|functions}1">;
++ def err_function_marked_override_not_overriding : Error<
++   "%0 marked 'override' but does not override any member functions">;
++ def warn_destructor_marked_not_override_overriding : TextSubstitution <
++   "%0 overrides a destructor but is not marked 'override'">;
++ def warn_function_marked_not_override_overriding : TextSubstitution <
++   "%0 overrides a member function but is not marked 'override'">;
++ def warn_inconsistent_destructor_marked_not_override_overriding : Warning <
++   "%sub{warn_destructor_marked_not_override_overriding}0">,
++   InGroup<CXX11WarnInconsistentOverrideDestructor>, DefaultIgnore;
++ def warn_inconsistent_function_marked_not_override_overriding : Warning <
++   "%sub{warn_function_marked_not_override_overriding}0">,
++   InGroup<CXX11WarnInconsistentOverrideMethod>;
++ def warn_suggest_destructor_marked_not_override_overriding : Warning <
++   "%sub{warn_destructor_marked_not_override_overriding}0">,
++   InGroup<CXX11WarnSuggestOverrideDestructor>, DefaultIgnore;
++ def warn_suggest_function_marked_not_override_overriding : Warning <
++   "%sub{warn_function_marked_not_override_overriding}0">,
++   InGroup<CXX11WarnSuggestOverride>, DefaultIgnore;
++ def err_class_marked_final_used_as_base : Error<
++   "base %0 is marked '%select{final|sealed}1'">;
++ def warn_abstract_final_class : Warning<
++   "abstract class is marked '%select{final|sealed}0'">, InGroup<AbstractFinalClass>;
++ def warn_final_dtor_non_final_class : Warning<
++   "class with destructor marked '%select{final|sealed}0' cannot be inherited from">,
++   InGroup<FinalDtorNonFinalClass>;
++ def note_final_dtor_non_final_class_silence : Note<
++   "mark %0 as '%select{final|sealed}1' to silence this warning">;
++ 
++ // C++11 attributes
++ def err_repeat_attribute : Error<"%0 attribute cannot be repeated">;
++ 
++ // C++11 final
++ def err_final_function_overridden : Error<
++   "declaration of %0 overrides a '%select{final|sealed}1' function">;
++ 
++ // C++11 scoped enumerations
++ def err_enum_invalid_underlying : Error<
++   "non-integral type %0 is an invalid underlying type">;
++ def err_enumerator_too_large : Error<
++   "enumerator value is not representable in the underlying type %0">;
++ def ext_enumerator_too_large : Extension<
++   "enumerator value is not representable in the underlying type %0">,
++   InGroup<MicrosoftEnumValue>;
++ def err_enumerator_wrapped : Error<
++   "enumerator value %0 is not representable in the underlying type %1">;
++ def err_enum_redeclare_type_mismatch : Error<
++   "enumeration redeclared with different underlying type %0 (was %1)">;
++ def err_enum_redeclare_fixed_mismatch : Error<
++   "enumeration previously declared with %select{non|}0fixed underlying type">;
++ def err_enum_redeclare_scoped_mismatch : Error<
++   "enumeration previously declared as %select{un|}0scoped">;
++ def err_only_enums_have_underlying_types : Error<
++   "only enumeration types have underlying types">;
++ def err_underlying_type_of_incomplete_enum : Error<
++   "cannot determine underlying type of incomplete enumeration type %0">;
++ 
++ // C++11 delegating constructors
++ def err_delegating_ctor : Error<
++   "delegating constructors are permitted only in C++11">;
++ def warn_cxx98_compat_delegating_ctor : Warning<
++   "delegating constructors are incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_delegating_initializer_alone : Error<
++   "an initializer for a delegating constructor must appear alone">;
++ def warn_delegating_ctor_cycle : Warning<
++   "constructor for %0 creates a delegation cycle">, DefaultError,
++   InGroup<DelegatingCtorCycles>;
++ def note_it_delegates_to : Note<"it delegates to">;
++ def note_which_delegates_to : Note<"which delegates to">;
++ 
++ // C++11 range-based for loop
++ def err_for_range_decl_must_be_var : Error<
++   "for range declaration must declare a variable">;
++ def err_for_range_storage_class : Error<
++   "loop variable %0 may not be declared %select{'extern'|'static'|"
++   "'__private_extern__'|'auto'|'register'|'constexpr'|'thread_local'}1">;
++ def err_type_defined_in_for_range : Error<
++   "types may not be defined in a for range declaration">;
++ def err_for_range_deduction_failure : Error<
++   "cannot use type %0 as a range">;
++ def err_for_range_incomplete_type : Error<
++   "cannot use incomplete type %0 as a range">;
++ def err_for_range_iter_deduction_failure : Error<
++   "cannot use type %0 as an iterator">;
++ def ext_for_range_begin_end_types_differ : ExtWarn<
++   "'begin' and 'end' returning different types (%0 and %1) is a C++17 extension">,
++   InGroup<CXX17>;
++ def warn_for_range_begin_end_types_differ : Warning<
++   "'begin' and 'end' returning different types (%0 and %1) is incompatible "
++   "with C++ standards before C++17">, InGroup<CXXPre17Compat>, DefaultIgnore;
++ def note_in_for_range: Note<
++   "when looking up '%select{begin|end}0' function for range expression "
++   "of type %1">;
++ def err_for_range_invalid: Error<
++   "invalid range expression of type %0; no viable '%select{begin|end}1' "
++   "function available">;
++ def note_for_range_member_begin_end_ignored : Note<
++   "member is not a candidate because range type %0 has no '%select{end|begin}1' member">;
++ def err_range_on_array_parameter : Error<
++   "cannot build range expression with array function parameter %0 since "
++   "parameter with array type %1 is treated as pointer type %2">;
++ def err_for_range_dereference : Error<
++   "invalid range expression of type %0; did you mean to dereference it "
++   "with '*'?">;
++ def note_for_range_invalid_iterator : Note <
++   "in implicit call to 'operator%select{!=|*|++}0' for iterator of type %1">;
++ def note_for_range_begin_end : Note<
++   "selected '%select{begin|end}0' %select{function|template }1%2 with iterator type %3">;
++ def warn_for_range_const_ref_binds_temp_built_from_ref : Warning<
++   "loop variable %0 "
++   "%diff{of type $ binds to a temporary constructed from type $"
++   "|binds to a temporary constructed from a different type}1,2">,
++   InGroup<RangeLoopConstruct>, DefaultIgnore;
++ def note_use_type_or_non_reference : Note<
++   "use non-reference type %0 to make construction explicit or type %1 to prevent copying">;
++ def warn_for_range_ref_binds_ret_temp : Warning<
++   "loop variable %0 binds to a temporary value produced by a range of type %1">,
++   InGroup<RangeLoopBindReference>, DefaultIgnore;
++ def note_use_non_reference_type : Note<"use non-reference type %0">;
++ def warn_for_range_copy : Warning<
++   "loop variable %0 creates a copy from type %1">,
++   InGroup<RangeLoopConstruct>, DefaultIgnore;
++ def note_use_reference_type : Note<"use reference type %0 to prevent copying">;
++ def err_objc_for_range_init_stmt : Error<
++   "initialization statement is not supported when iterating over Objective-C "
++   "collection">;
++ 
++ // C++11 constexpr
++ def warn_cxx98_compat_constexpr : Warning<
++   "'constexpr' specifier is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ // FIXME: Maybe this should also go in -Wc++14-compat?
++ def warn_cxx14_compat_constexpr_not_const : Warning<
++   "'constexpr' non-static member function will not be implicitly 'const' "
++   "in C++14; add 'const' to avoid a change in behavior">,
++   InGroup<DiagGroup<"constexpr-not-const">>;
++ def err_invalid_consteval_take_address : Error<
++   "cannot take address of consteval function %0 outside"
++   " of an immediate invocation">;
++ def err_invalid_consteval_call : Error<
++   "call to consteval function %q0 is not a constant expression">;
++ def err_invalid_consteval_decl_kind : Error<
++   "%0 cannot be declared consteval">;
++ def err_invalid_constexpr : Error<
++   "%select{function parameter|typedef}0 "
++   "cannot be %sub{select_constexpr_spec_kind}1">;
++ def err_invalid_constexpr_member : Error<"non-static data member cannot be "
++   "constexpr%select{; did you intend to make it %select{const|static}0?|}1">;
++ def err_constexpr_tag : Error<
++   "%select{class|struct|interface|union|enum}0 "
++   "cannot be marked %sub{select_constexpr_spec_kind}1">;
++ def err_constexpr_dtor : Error<
++   "destructor cannot be declared %sub{select_constexpr_spec_kind}0">;
++ def err_constexpr_dtor_subobject : Error<
++   "destructor cannot be declared %sub{select_constexpr_spec_kind}0 because "
++   "%select{data member %2|base class %3}1 does not have a "
++   "constexpr destructor">;
++ def note_constexpr_dtor_subobject : Note<
++   "%select{data member %1|base class %2}0 declared here">;
++ def err_constexpr_wrong_decl_kind : Error<
++   "%sub{select_constexpr_spec_kind}0 can only be used "
++   "in %select{|variable and function|function|variable}0 declarations">;
++ def err_invalid_constexpr_var_decl : Error<
++   "constexpr variable declaration must be a definition">;
++ def err_constexpr_static_mem_var_requires_init : Error<
++   "declaration of constexpr static data member %0 requires an initializer">;
++ def err_constexpr_var_non_literal : Error<
++   "constexpr variable cannot have non-literal type %0">;
++ def err_constexpr_var_requires_const_init : Error<
++   "constexpr variable %0 must be initialized by a constant expression">;
++ def err_constexpr_var_requires_const_destruction : Error<
++   "constexpr variable %0 must have constant destruction">;
++ def err_constexpr_redecl_mismatch : Error<
++   "%select{non-constexpr|constexpr|consteval}1 declaration of %0"
++   " follows %select{non-constexpr|constexpr|consteval}2 declaration">;
++ def err_constexpr_virtual : Error<"virtual function cannot be constexpr">;
++ def warn_cxx17_compat_constexpr_virtual : Warning<
++   "virtual constexpr functions are incompatible with "
++   "C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ def err_constexpr_virtual_base : Error<
++   "constexpr %select{member function|constructor}0 not allowed in "
++   "%select{struct|interface|class}1 with virtual base "
++   "%plural{1:class|:classes}2">;
++ def note_non_literal_incomplete : Note<
++   "incomplete type %0 is not a literal type">;
++ def note_non_literal_virtual_base : Note<"%select{struct|interface|class}0 "
++   "with virtual base %plural{1:class|:classes}1 is not a literal type">;
++ def note_constexpr_virtual_base_here : Note<"virtual base class declared here">;
++ def err_constexpr_non_literal_return : Error<
++   "%select{constexpr|consteval}0 function's return type %1 is not a literal type">;
++ def err_constexpr_non_literal_param : Error<
++   "%select{constexpr|consteval}2 %select{function|constructor}1's %ordinal0 parameter type %3 is "
++   "not a literal type">;
++ def err_constexpr_body_invalid_stmt : Error<
++   "statement not allowed in %select{constexpr|consteval}1 %select{function|constructor}0">;
++ def ext_constexpr_body_invalid_stmt : ExtWarn<
++   "use of this statement in a constexpr %select{function|constructor}0 "
++   "is a C++14 extension">, InGroup<CXX14>;
++ def warn_cxx11_compat_constexpr_body_invalid_stmt : Warning<
++   "use of this statement in a constexpr %select{function|constructor}0 "
++   "is incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ def ext_constexpr_body_invalid_stmt_cxx20 : ExtWarn<
++   "use of this statement in a constexpr %select{function|constructor}0 "
++   "is a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_constexpr_body_invalid_stmt : Warning<
++   "use of this statement in a constexpr %select{function|constructor}0 "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_constexpr_type_definition : ExtWarn<
++   "type definition in a constexpr %select{function|constructor}0 "
++   "is a C++14 extension">, InGroup<CXX14>;
++ def warn_cxx11_compat_constexpr_type_definition : Warning<
++   "type definition in a constexpr %select{function|constructor}0 "
++   "is incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ def err_constexpr_vla : Error<
++   "variably-modified type %0 cannot be used in a constexpr "
++   "%select{function|constructor}1">;
++ def ext_constexpr_local_var : ExtWarn<
++   "variable declaration in a constexpr %select{function|constructor}0 "
++   "is a C++14 extension">, InGroup<CXX14>;
++ def warn_cxx11_compat_constexpr_local_var : Warning<
++   "variable declaration in a constexpr %select{function|constructor}0 "
++   "is incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ def err_constexpr_local_var_static : Error<
++   "%select{static|thread_local}1 variable not permitted in a constexpr "
++   "%select{function|constructor}0">;
++ def err_constexpr_local_var_non_literal_type : Error<
++   "variable of non-literal type %1 cannot be defined in a constexpr "
++   "%select{function|constructor}0">;
++ def ext_constexpr_local_var_no_init : ExtWarn<
++   "uninitialized variable in a constexpr %select{function|constructor}0 "
++   "is a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_constexpr_local_var_no_init : Warning<
++   "uninitialized variable in a constexpr %select{function|constructor}0 "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_constexpr_function_never_constant_expr : ExtWarn<
++   "%select{constexpr|consteval}1 %select{function|constructor}0 never produces a "
++   "constant expression">, InGroup<DiagGroup<"invalid-constexpr">>, DefaultError;
++ def err_attr_cond_never_constant_expr : Error<
++   "%0 attribute expression never produces a constant expression">;
++ def err_diagnose_if_invalid_diagnostic_type : Error<
++   "invalid diagnostic type for 'diagnose_if'; use \"error\" or \"warning\" "
++   "instead">;
++ def err_constexpr_body_no_return : Error<
++   "no return statement in %select{constexpr|consteval}0 function">;
++ def err_constexpr_return_missing_expr : Error<
++   "non-void %select{constexpr|consteval}1 function %0 should return a value">;
++ def warn_cxx11_compat_constexpr_body_no_return : Warning<
++   "constexpr function with no return statements is incompatible with C++ "
++   "standards before C++14">, InGroup<CXXPre14Compat>, DefaultIgnore;
++ def ext_constexpr_body_multiple_return : ExtWarn<
++   "multiple return statements in constexpr function is a C++14 extension">,
++   InGroup<CXX14>;
++ def warn_cxx11_compat_constexpr_body_multiple_return : Warning<
++   "multiple return statements in constexpr function "
++   "is incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ def note_constexpr_body_previous_return : Note<
++   "previous return statement is here">;
++ 
++ // C++20 function try blocks in constexpr
++ def ext_constexpr_function_try_block_cxx20 : ExtWarn<
++   "function try block in constexpr %select{function|constructor}0 is "
++   "a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_constexpr_function_try_block : Warning<
++   "function try block in constexpr %select{function|constructor}0 is "
++   "incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ 
++ def ext_constexpr_union_ctor_no_init : ExtWarn<
++   "constexpr union constructor that does not initialize any member "
++   "is a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_constexpr_union_ctor_no_init : Warning<
++   "constexpr union constructor that does not initialize any member "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_constexpr_ctor_missing_init : ExtWarn<
++   "constexpr constructor that does not initialize all members "
++   "is a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_constexpr_ctor_missing_init : Warning<
++   "constexpr constructor that does not initialize all members "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def note_constexpr_ctor_missing_init : Note<
++   "member not initialized by constructor">;
++ def note_non_literal_no_constexpr_ctors : Note<
++   "%0 is not literal because it is not an aggregate and has no constexpr "
++   "constructors other than copy or move constructors">;
++ def note_non_literal_base_class : Note<
++   "%0 is not literal because it has base class %1 of non-literal type">;
++ def note_non_literal_field : Note<
++   "%0 is not literal because it has data member %1 of "
++   "%select{non-literal|volatile}3 type %2">;
++ def note_non_literal_user_provided_dtor : Note<
++   "%0 is not literal because it has a user-provided destructor">;
++ def note_non_literal_nontrivial_dtor : Note<
++   "%0 is not literal because it has a non-trivial destructor">;
++ def note_non_literal_non_constexpr_dtor : Note<
++   "%0 is not literal because its destructor is not constexpr">;
++ def note_non_literal_lambda : Note<
++   "lambda closure types are non-literal types before C++17">;
++ def warn_private_extern : Warning<
++   "use of __private_extern__ on a declaration may not produce external symbol "
++   "private to the linkage unit and is deprecated">, InGroup<PrivateExtern>;
++ def note_private_extern : Note<
++   "use __attribute__((visibility(\"hidden\"))) attribute instead">;
++ 
++ // C++ Concepts
++ def err_concept_decls_may_only_appear_in_global_namespace_scope : Error<
++   "concept declarations may only appear in global or namespace scope">;
++ def err_concept_no_parameters : Error<
++   "concept template parameter list must have at least one parameter; explicit "
++   "specialization of concepts is not allowed">;
++ def err_concept_extra_headers : Error<
++   "extraneous template parameter list in concept definition">;
++ def err_concept_no_associated_constraints : Error<
++   "concept cannot have associated constraints">;
++ def err_non_constant_constraint_expression : Error<
++   "substitution into constraint expression resulted in a non-constant "
++   "expression">;
++ def err_non_bool_atomic_constraint : Error<
++   "atomic constraint must be of type 'bool' (found %0)">;
++ def err_template_arg_list_constraints_not_satisfied : Error<
++   "constraints not satisfied for %select{class template|function template|variable template|alias template|"
++   "template template parameter|template}0 %1%2">;
++ def note_substituted_constraint_expr_is_ill_formed : Note<
++   "because substituted constraint expression is ill-formed%0">;
++ def note_atomic_constraint_evaluated_to_false : Note<
++   "%select{and|because}0 '%1' evaluated to false">;
++ def note_concept_specialization_constraint_evaluated_to_false : Note<
++   "%select{and|because}0 '%1' evaluated to false">;
++ def note_single_arg_concept_specialization_constraint_evaluated_to_false : Note<
++   "%select{and|because}0 %1 does not satisfy %2">;
++ def note_atomic_constraint_evaluated_to_false_elaborated : Note<
++   "%select{and|because}0 '%1' (%2 %3 %4) evaluated to false">;
++ def err_constrained_virtual_method : Error<
++   "virtual function cannot have a requires clause">;
++ def err_trailing_requires_clause_on_deduction_guide : Error<
++   "deduction guide cannot have a requires clause">;
++ def err_reference_to_function_with_unsatisfied_constraints : Error<
++   "invalid reference to function %0: constraints not satisfied">;
++ def err_requires_expr_local_parameter_default_argument : Error<
++   "default arguments not allowed for parameters of a requires expression">;
++ def err_requires_expr_parameter_referenced_in_evaluated_context : Error<
++   "constraint variable %0 cannot be used in an evaluated context">;
++ def note_expr_requirement_expr_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid: %2">;
++ def note_expr_requirement_expr_unknown_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid">;
++ def note_expr_requirement_noexcept_not_met : Note<
++   "%select{and|because}0 '%1' may throw an exception">;
++ def note_expr_requirement_type_requirement_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid: %2">;
++ def note_expr_requirement_type_requirement_unknown_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid">;
++ def note_expr_requirement_constraints_not_satisfied : Note<
++   "%select{and|because}0 type constraint '%1' was not satisfied:">;
++ def note_expr_requirement_constraints_not_satisfied_simple : Note<
++   "%select{and|because}0 %1 does not satisfy %2:">;
++ def note_type_requirement_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid: %2">;
++ def note_type_requirement_unknown_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid">;
++ def note_nested_requirement_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid: %2">;
++ def note_nested_requirement_unknown_substitution_error : Note<
++   "%select{and|because}0 '%1' would be invalid">;
++ def note_ambiguous_atomic_constraints : Note<
++   "similar constraint expressions not considered equivalent; constraint "
++   "expressions cannot be considered equivalent unless they originate from the "
++   "same concept">;
++ def note_ambiguous_atomic_constraints_similar_expression : Note<
++   "similar constraint expression here">;
++ def err_unsupported_placeholder_constraint : Error<
++   "constrained placeholder types other than simple 'auto' on non-type template "
++   "parameters not supported yet">;
++ 
++ def err_template_different_requires_clause : Error<
++   "requires clause differs in template redeclaration">;
++ def err_template_different_type_constraint : Error<
++   "type constraint differs in template redeclaration">;
++ def err_template_template_parameter_not_at_least_as_constrained : Error<
++   "template template argument %0 is more constrained than template template "
++   "parameter %1">;
++ 
++ def err_type_constraint_non_type_concept : Error<
++   "concept named in type constraint is not a type concept">;
++ def err_type_constraint_missing_arguments : Error<
++   "%0 requires more than 1 template argument; provide the remaining arguments "
++   "explicitly to use it here">;
++ def err_placeholder_constraints_not_satisfied : Error<
++   "deduced type %0 does not satisfy %1">;
++ 
++ // C++11 char16_t/char32_t
++ def warn_cxx98_compat_unicode_type : Warning<
++   "'%0' type specifier is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_cxx17_compat_unicode_type : Warning<
++   "'char8_t' type specifier is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ 
++ // __make_integer_seq
++ def err_integer_sequence_negative_length : Error<
++   "integer sequences must have non-negative sequence length">;
++ def err_integer_sequence_integral_element_type : Error<
++   "integer sequences must have integral element type">;
++ 
++ // __type_pack_element
++ def err_type_pack_element_out_of_bounds : Error<
++   "a parameter pack may not be accessed at an out of bounds index">;
++ 
++ // Objective-C++
++ def err_objc_decls_may_only_appear_in_global_scope : Error<
++   "Objective-C declarations may only appear in global scope">;
++ def warn_auto_var_is_id : Warning<
++   "'auto' deduced as 'id' in declaration of %0">,
++   InGroup<DiagGroup<"auto-var-id">>;
++ 
++ // Attributes
++ def warn_nomerge_attribute_ignored_in_stmt: Warning<
++   "%0 attribute is ignored because there exists no call expression inside the "
++   "statement">,
++   InGroup<IgnoredAttributes>;
++ 
++ def err_musttail_needs_trivial_args : Error<
++   "tail call requires that the return value, all parameters, and any "
++   "temporaries created by the expression are trivially destructible">;
++ def err_musttail_needs_call : Error<
++   "%0 attribute requires that the return value is the result of a function call"
++   >;
++ def err_musttail_needs_prototype : Error<
++   "%0 attribute requires that both caller and callee functions have a "
++   "prototype">;
++ def note_musttail_fix_non_prototype : Note<
++   "add 'void' to the parameter list to turn an old-style K&R function "
++   "declaration into a prototype">;
++ def err_musttail_structors_forbidden : Error<"cannot perform a tail call "
++   "%select{from|to}0 a %select{constructor|destructor}1">;
++ def note_musttail_structors_forbidden : Note<"target "
++   "%select{constructor|destructor}0 is declared here">;
++ def err_musttail_forbidden_from_this_context : Error<
++   "%0 attribute cannot be used from "
++   "%select{a block|an Objective-C function|this context}1">;
++ def err_musttail_member_mismatch : Error<
++   "%select{non-member|static member|non-static member}0 "
++   "function cannot perform a tail call to "
++   "%select{non-member|static member|non-static member|pointer-to-member}1 "
++   "function%select{| %3}2">;
++ def note_musttail_callee_defined_here : Note<"%0 declared here">;
++ def note_tail_call_required : Note<"tail call required by %0 attribute here">;
++ def err_musttail_mismatch : Error<
++   "cannot perform a tail call to function%select{| %1}0 because its signature "
++   "is incompatible with the calling function">;
++ def note_musttail_mismatch : Note<
++     "target function "
++     "%select{is a member of different class%diff{ (expected $ but has $)|}1,2"
++     "|has different number of parameters (expected %1 but has %2)"
++     "|has type mismatch at %ordinal3 parameter"
++     "%diff{ (expected $ but has $)|}1,2"
++     "|has different return type%diff{ ($ expected but has $)|}1,2}0">;
++ def err_musttail_callconv_mismatch : Error<
++   "cannot perform a tail call to function%select{| %1}0 because it uses an "
++   "incompatible calling convention">;
++ def note_musttail_callconv_mismatch : Note<
++   "target function has calling convention %1 (expected %0)">;
++ def err_musttail_scope : Error<
++   "cannot perform a tail call from this return statement">;
++ def err_musttail_no_variadic : Error<
++   "%0 attribute may not be used with variadic functions">;
++ 
++ def err_nsobject_attribute : Error<
++   "'NSObject' attribute is for pointer types only">;
++ def err_attributes_are_not_compatible : Error<
++   "%0 and %1 attributes are not compatible">;
++ def err_attribute_invalid_argument : Error<
++   "%select{a reference type|an array type|a non-vector or "
++   "non-vectorizable scalar type}0 is an invalid argument to attribute %1">;
++ def err_attribute_wrong_number_arguments : Error<
++   "%0 attribute %plural{0:takes no arguments|1:takes one argument|"
++   ":requires exactly %1 arguments}1">;
++ def err_attribute_too_many_arguments : Error<
++   "%0 attribute takes no more than %1 argument%s1">;
++ def err_attribute_too_few_arguments : Error<
++   "%0 attribute takes at least %1 argument%s1">;
++ def err_attribute_invalid_vector_type : Error<"invalid vector element type %0">;
++ def err_attribute_invalid_matrix_type : Error<"invalid matrix element type %0">;
++ def err_attribute_bad_neon_vector_size : Error<
++   "Neon vector size must be 64 or 128 bits">;
++ def err_attribute_invalid_sve_type : Error<
++   "%0 attribute applied to non-SVE type %1">;
++ def err_attribute_bad_sve_vector_size : Error<
++   "invalid SVE vector size '%0', must match value set by "
++   "'-msve-vector-bits' ('%1')">;
++ def err_attribute_arm_feature_sve_bits_unsupported : Error<
++   "%0 is only supported when '-msve-vector-bits=<bits>' is specified with a "
++   "value of 128, 256, 512, 1024 or 2048.">;
++ def err_attribute_requires_positive_integer : Error<
++   "%0 attribute requires a %select{positive|non-negative}1 "
++   "integral compile time constant expression">;
++ def err_attribute_requires_opencl_version : Error<
++   "attribute %0 is supported in the OpenCL version %1%select{| onwards}2">;
++ def err_invalid_branch_protection_spec : Error<
++   "invalid or misplaced branch protection specification '%0'">;
++ def warn_unsupported_target_attribute
++     : Warning<"%select{unsupported|duplicate|unknown}0%select{| architecture|"
++               " tune CPU}1 '%2' in the 'target' attribute string; 'target' "
++               "attribute ignored">,
++       InGroup<IgnoredAttributes>;
++ def err_attribute_unsupported
++     : Error<"%0 attribute is not supported on targets missing %1;"
++             " specify an appropriate -march= or -mcpu=">;
++ // The err_*_attribute_argument_not_int are separate because they're used by
++ // VerifyIntegerConstantExpression.
++ def err_aligned_attribute_argument_not_int : Error<
++   "'aligned' attribute requires integer constant">;
++ def err_align_value_attribute_argument_not_int : Error<
++   "'align_value' attribute requires integer constant">;
++ def err_alignas_attribute_wrong_decl_type : Error<
++   "%0 attribute cannot be applied to a %select{function parameter|"
++   "variable with 'register' storage class|'catch' variable|bit-field}1">;
++ def err_alignas_missing_on_definition : Error<
++   "%0 must be specified on definition if it is specified on any declaration">;
++ def note_alignas_on_declaration : Note<"declared with %0 attribute here">;
++ def err_alignas_mismatch : Error<
++   "redeclaration has different alignment requirement (%1 vs %0)">;
++ def err_alignas_underaligned : Error<
++   "requested alignment is less than minimum alignment of %1 for type %0">;
++ def warn_aligned_attr_underaligned : Warning<err_alignas_underaligned.Text>,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_sizeless_type : Error<
++   "%0 attribute cannot be applied to sizeless type %1">;
++ def err_attribute_argument_n_type : Error<
++   "%0 attribute requires parameter %1 to be %select{int or bool|an integer "
++   "constant|a string|an identifier|a constant expression}2">;
++ def err_attribute_argument_type : Error<
++   "%0 attribute requires %select{int or bool|an integer "
++   "constant|a string|an identifier}1">;
++ def err_attribute_argument_out_of_range : Error<
++   "%0 attribute requires integer constant between %1 and %2 inclusive">;
++ def err_init_priority_object_attr : Error<
++   "can only use 'init_priority' attribute on file-scope definitions "
++   "of objects of class type">;
++ def err_attribute_argument_out_of_bounds : Error<
++   "%0 attribute parameter %1 is out of bounds">;
++ def err_attribute_only_once_per_parameter : Error<
++   "%0 attribute can only be applied once per parameter">;
++ def err_mismatched_uuid : Error<"uuid does not match previous declaration">;
++ def note_previous_uuid : Note<"previous uuid specified here">;
++ def warn_attribute_pointers_only : Warning<
++   "%0 attribute only applies to%select{| constant}1 pointer arguments">,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_pointers_only : Error<warn_attribute_pointers_only.Text>;
++ def err_attribute_integers_only : Error<
++   "%0 attribute argument may only refer to a function parameter of integer "
++   "type">;
++ def warn_attribute_return_pointers_only : Warning<
++   "%0 attribute only applies to return values that are pointers">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_return_pointers_refs_only : Warning<
++   "%0 attribute only applies to return values that are pointers or references">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_pointer_or_reference_only : Warning<
++   "%0 attribute only applies to a pointer or reference (%1 is invalid)">,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_no_member_pointers : Error<
++   "%0 attribute cannot be used with pointers to members">;
++ def err_attribute_invalid_implicit_this_argument : Error<
++   "%0 attribute is invalid for the implicit this argument">;
++ def err_ownership_type : Error<
++   "%0 attribute only applies to %select{pointer|integer}1 arguments">;
++ def err_ownership_returns_index_mismatch : Error<
++   "'ownership_returns' attribute index does not match; here it is %0">;
++ def note_ownership_returns_index_mismatch : Note<
++   "declared with index %0 here">;
++ def err_format_strftime_third_parameter : Error<
++   "strftime format attribute requires 3rd parameter to be 0">;
++ def err_format_attribute_requires_variadic : Error<
++   "format attribute requires variadic function">;
++ def err_format_attribute_not : Error<"format argument not %0">;
++ def err_format_attribute_result_not : Error<"function does not return %0">;
++ def err_format_attribute_implicit_this_format_string : Error<
++   "format attribute cannot specify the implicit this argument as the format "
++   "string">;
++ def err_callback_attribute_no_callee : Error<
++   "'callback' attribute specifies no callback callee">;
++ def err_callback_attribute_invalid_callee : Error<
++   "'callback' attribute specifies invalid callback callee">;
++ def err_callback_attribute_multiple : Error<
++   "multiple 'callback' attributes specified">;
++ def err_callback_attribute_argument_unknown : Error<
++   "'callback' attribute argument %0 is not a known function parameter">;
++ def err_callback_callee_no_function_type : Error<
++   "'callback' attribute callee does not have function type">;
++ def err_callback_callee_is_variadic : Error<
++   "'callback' attribute callee may not be variadic">;
++ def err_callback_implicit_this_not_available : Error<
++   "'callback' argument at position %0 references unavailable implicit 'this'">;
++ def err_init_method_bad_return_type : Error<
++   "init methods must return an object pointer type, not %0">;
++ def err_attribute_invalid_size : Error<
++   "vector size not an integral multiple of component size">;
++ def err_attribute_zero_size : Error<"zero %0 size">;
++ def err_attribute_size_too_large : Error<"%0 size too large">;
++ def err_typecheck_sve_ambiguous : Error<
++   "cannot combine fixed-length and sizeless SVE vectors in expression, result is ambiguous (%0 and %1)">;
++ def err_typecheck_sve_gnu_ambiguous : Error<
++   "cannot combine GNU and SVE vectors in expression, result is ambiguous (%0 and %1)">;
++ def err_typecheck_vector_not_convertable_implict_truncation : Error<
++    "cannot convert between %select{scalar|vector}0 type %1 and vector type"
++    " %2 as implicit conversion would cause truncation">;
++ def err_typecheck_vector_not_convertable : Error<
++   "cannot convert between vector values of different size (%0 and %1)">;
++ def err_typecheck_vector_not_convertable_non_scalar : Error<
++   "cannot convert between vector and non-scalar values (%0 and %1)">;
++ def err_typecheck_vector_lengths_not_equal : Error<
++   "vector operands do not have the same number of elements (%0 and %1)">;
++ def warn_typecheck_vector_element_sizes_not_equal : Warning<
++   "vector operands do not have the same elements sizes (%0 and %1)">,
++   InGroup<DiagGroup<"vec-elem-size">>, DefaultError;
++ def err_ext_vector_component_exceeds_length : Error<
++   "vector component access exceeds type %0">;
++ def err_ext_vector_component_name_illegal : Error<
++   "illegal vector component name '%0'">;
++ def err_attribute_address_space_negative : Error<
++   "address space is negative">;
++ def err_attribute_address_space_too_high : Error<
++   "address space is larger than the maximum supported (%0)">;
++ def err_attribute_address_multiple_qualifiers : Error<
++   "multiple address spaces specified for type">;
++ def warn_attribute_address_multiple_identical_qualifiers : Warning<
++   "multiple identical address spaces specified for type">,
++   InGroup<DuplicateDeclSpecifier>;
++ def err_attribute_not_clinkage : Error<
++   "function type with %0 attribute must have C linkage">;
++ def err_function_decl_cmse_ns_call : Error<
++   "functions may not be declared with 'cmse_nonsecure_call' attribute">;
++ def err_attribute_address_function_type : Error<
++   "function type may not be qualified with an address space">;
++ def err_as_qualified_auto_decl : Error<
++   "automatic variable qualified with an%select{| invalid}0 address space">;
++ def err_arg_with_address_space : Error<
++   "parameter may not be qualified with an address space">;
++ def err_field_with_address_space : Error<
++   "field may not be qualified with an address space">;
++ def err_compound_literal_with_address_space : Error<
++   "compound literal in function scope may not be qualified with an address space">;
++ def err_address_space_mismatch_templ_inst : Error<
++   "conflicting address space qualifiers are provided between types %0 and %1">;
++ def err_attr_objc_ownership_redundant : Error<
++   "the type %0 is already explicitly ownership-qualified">;
++ def err_invalid_nsnumber_type : Error<
++   "%0 is not a valid literal type for NSNumber">;
++ def err_objc_illegal_boxed_expression_type : Error<
++   "illegal type %0 used in a boxed expression">;
++ def err_objc_non_trivially_copyable_boxed_expression_type : Error<
++   "non-trivially copyable type %0 cannot be used in a boxed expression">;
++ def err_objc_incomplete_boxed_expression_type : Error<
++   "incomplete type %0 used in a boxed expression">;
++ def err_undeclared_objc_literal_class : Error<
++   "definition of class %0 must be available to use Objective-C "
++   "%select{array literals|dictionary literals|numeric literals|boxed expressions|"
++   "string literals}1">;
++ def err_undeclared_boxing_method : Error<
++   "declaration of %0 is missing in %1 class">;
++ def err_objc_literal_method_sig : Error<
++   "literal construction method %0 has incompatible signature">;
++ def note_objc_literal_method_param : Note<
++   "%select{first|second|third}0 parameter has unexpected type %1 "
++   "(should be %2)">;
++ def note_objc_literal_method_return : Note<
++   "method returns unexpected type %0 (should be an object type)">;
++ def err_invalid_collection_element : Error<
++   "collection element of type %0 is not an Objective-C object">;
++ def err_box_literal_collection : Error<
++   "%select{string|character|boolean|numeric}0 literal must be prefixed by '@' "
++   "in a collection">;
++ def warn_objc_literal_comparison : Warning<
++   "direct comparison of %select{an array literal|a dictionary literal|"
++   "a numeric literal|a boxed expression|}0 has undefined behavior">,
++   InGroup<ObjCLiteralComparison>;
++ def err_missing_atsign_prefix : Error<
++   "%select{string|numeric}0 literal must be prefixed by '@'">;
++ def warn_objc_string_literal_comparison : Warning<
++   "direct comparison of a string literal has undefined behavior">,
++   InGroup<ObjCStringComparison>;
++ def warn_concatenated_literal_array_init : Warning<
++   "suspicious concatenation of string literals in an array initialization; "
++   "did you mean to separate the elements with a comma?">,
++   InGroup<StringConcatation>, DefaultIgnore;
++ def warn_concatenated_nsarray_literal : Warning<
++   "concatenated NSString literal for an NSArray expression - "
++   "possibly missing a comma">,
++   InGroup<ObjCStringConcatenation>;
++ def note_objc_literal_comparison_isequal : Note<
++   "use 'isEqual:' instead">;
++ def warn_objc_collection_literal_element : Warning<
++   "object of type %0 is not compatible with "
++   "%select{array element type|dictionary key type|dictionary value type}1 %2">,
++   InGroup<ObjCLiteralConversion>;
++ def warn_nsdictionary_duplicate_key : Warning<
++   "duplicate key in dictionary literal">,
++   InGroup<DiagGroup<"objc-dictionary-duplicate-keys">>;
++ def note_nsdictionary_duplicate_key_here : Note<
++   "previous equal key is here">;
++ def err_swift_param_attr_not_swiftcall : Error<
++   "'%0' parameter can only be used with swiftcall%select{ or swiftasynccall|}1 "
++   "calling convention%select{|s}1">;
++ def err_swift_indirect_result_not_first : Error<
++   "'swift_indirect_result' parameters must be first parameters of function">;
++ def err_swift_error_result_not_after_swift_context : Error<
++   "'swift_error_result' parameter must follow 'swift_context' parameter">;
++ def err_swift_abi_parameter_wrong_type : Error<
++   "'%0' parameter must have pointer%select{| to unqualified pointer}1 type; "
++   "type here is %2">;
++ 
++ def err_attribute_argument_invalid : Error<
++   "%0 attribute argument is invalid: %select{max must be 0 since min is 0|"
++   "min must not be greater than max}1">;
++ def err_attribute_argument_is_zero : Error<
++   "%0 attribute must be greater than 0">;
++ def warn_attribute_argument_n_negative : Warning<
++   "%0 attribute parameter %1 is negative and will be ignored">,
++   InGroup<CudaCompat>;
++ def err_property_function_in_objc_container : Error<
++   "use of Objective-C property in function nested in Objective-C "
++   "container not supported, move function outside its container">;
++ 
++ let CategoryName = "Cocoa API Issue" in {
++ def warn_objc_redundant_literal_use : Warning<
++   "using %0 with a literal is redundant">, InGroup<ObjCRedundantLiteralUse>;
++ }
++ 
++ def err_attr_tlsmodel_arg : Error<"tls_model must be \"global-dynamic\", "
++   "\"local-dynamic\", \"initial-exec\" or \"local-exec\"">;
++ 
++ def err_aix_attr_unsupported_tls_model : Error<"TLS model '%0' is not yet supported on AIX">;
++ 
++ def err_tls_var_aligned_over_maximum : Error<
++   "alignment (%0) of thread-local variable %1 is greater than the maximum supported "
++   "alignment (%2) for a thread-local variable on this target">;
++ 
++ def err_only_annotate_after_access_spec : Error<
++   "access specifier can only have annotation attributes">;
++ 
++ def err_attribute_section_invalid_for_target : Error<
++   "argument to %select{'code_seg'|'section'}1 attribute is not valid for this target: %0">;
++ def err_pragma_section_invalid_for_target : Error<
++   "argument to #pragma section is not valid for this target: %0">;
++ def warn_attribute_section_drectve : Warning<
++   "#pragma %0(\".drectve\") has undefined behavior, "
++   "use #pragma comment(linker, ...) instead">, InGroup<MicrosoftDrectveSection>;
++ def warn_mismatched_section : Warning<
++   "%select{codeseg|section}0 does not match previous declaration">, InGroup<Section>;
++ def warn_attribute_section_on_redeclaration : Warning<
++   "section attribute is specified on redeclared variable">, InGroup<Section>;
++ def err_mismatched_code_seg_base : Error<
++   "derived class must specify the same code segment as its base classes">;
++ def err_mismatched_code_seg_override : Error<
++   "overriding virtual function must specify the same code segment as its overridden function">;
++ def err_conflicting_codeseg_attribute : Error<
++   "conflicting code segment specifiers">;
++ def warn_duplicate_codeseg_attribute : Warning<
++   "duplicate code segment specifiers">, InGroup<Section>;
++ 
++ def err_anonymous_property: Error<
++   "anonymous property is not supported">;
++ def err_property_is_variably_modified : Error<
++   "property %0 has a variably modified type">;
++ def err_no_accessor_for_property : Error<
++   "no %select{getter|setter}0 defined for property %1">;
++ def err_cannot_find_suitable_accessor : Error<
++   "cannot find suitable %select{getter|setter}0 for property %1">;
++ 
++ def warn_alloca : Warning<
++   "use of function %0 is discouraged; there is no way to check for failure but "
++   "failure may still occur, resulting in a possibly exploitable security vulnerability">,
++   InGroup<DiagGroup<"alloca">>, DefaultIgnore;
++ 
++ def warn_alloca_align_alignof : Warning<
++   "second argument to __builtin_alloca_with_align is supposed to be in bits">,
++   InGroup<DiagGroup<"alloca-with-align-alignof">>;
++ 
++ def err_alignment_too_small : Error<
++   "requested alignment must be %0 or greater">;
++ def err_alignment_too_big : Error<
++   "requested alignment must be %0 or smaller">;
++ def err_alignment_not_power_of_two : Error<
++   "requested alignment is not a power of 2">;
++ def warn_alignment_not_power_of_two : Warning<
++   err_alignment_not_power_of_two.Text>,
++   InGroup<DiagGroup<"non-power-of-two-alignment">>;
++ def err_alignment_dependent_typedef_name : Error<
++   "requested alignment is dependent but declaration is not dependent">;
++ 
++ def warn_alignment_builtin_useless : Warning<
++   "%select{aligning a value|the result of checking whether a value is aligned}0"
++   " to 1 byte is %select{a no-op|always true}0">, InGroup<TautologicalCompare>;
++ def err_attribute_aligned_too_great : Error<
++   "requested alignment must be %0 bytes or smaller">;
++ def warn_assume_aligned_too_great
++     : Warning<"requested alignment must be %0 bytes or smaller; maximum "
++               "alignment assumed">,
++       InGroup<DiagGroup<"builtin-assume-aligned-alignment">>;
++ def warn_not_xl_compatible
++     : Warning<"requesting an alignment of 16 bytes or greater for struct"
++               " members is not binary compatible with AIX XL 16.1 and older">,
++       InGroup<AIXCompat>;
++ def warn_redeclaration_without_attribute_prev_attribute_ignored : Warning<
++   "%q0 redeclared without %1 attribute: previous %1 ignored">,
++   InGroup<MicrosoftInconsistentDllImport>;
++ def warn_redeclaration_without_import_attribute : Warning<
++   "%q0 redeclared without 'dllimport' attribute: 'dllexport' attribute added">,
++   InGroup<MicrosoftInconsistentDllImport>;
++ def warn_dllimport_dropped_from_inline_function : Warning<
++   "%q0 redeclared inline; %1 attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_ignored : Warning<"%0 attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_nothrow_attribute_ignored : Warning<"'nothrow' attribute conflicts with"
++   " exception specification; attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_ignored_on_non_definition :
++   Warning<"%0 attribute ignored on a non-definition declaration">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_ignored_on_inline :
++   Warning<"%0 attribute ignored on inline function">,
++   InGroup<IgnoredAttributes>;
++ def warn_nocf_check_attribute_ignored :
++   Warning<"'nocf_check' attribute ignored; use -fcf-protection to enable the attribute">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_after_definition_ignored : Warning<
++   "attribute %0 after definition is ignored">,
++    InGroup<IgnoredAttributes>;
++ def warn_attributes_likelihood_ifstmt_conflict
++     : Warning<"conflicting attributes %0 are ignored">,
++       InGroup<IgnoredAttributes>;
++ def warn_cxx11_gnu_attribute_on_type : Warning<
++   "attribute %0 ignored, because it cannot be applied to a type">,
++   InGroup<IgnoredAttributes>;
++ def warn_unhandled_ms_attribute_ignored : Warning<
++   "__declspec attribute %0 is not supported">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_has_no_effect_on_infinite_loop : Warning<
++   "attribute %0 has no effect when annotating an infinite loop">,
++    InGroup<IgnoredAttributes>;
++ def note_attribute_has_no_effect_on_infinite_loop_here : Note<
++   "annotating the infinite loop here">;
++ def warn_attribute_has_no_effect_on_if_constexpr : Warning<
++   "attribute %0 has no effect when annotating an 'if constexpr' statement">,
++    InGroup<IgnoredAttributes>;
++ def note_attribute_has_no_effect_on_if_constexpr_here : Note<
++   "annotating the 'if constexpr' statement here">;
++ def err_decl_attribute_invalid_on_stmt : Error<
++   "%0 attribute cannot be applied to a statement">;
++ def err_stmt_attribute_invalid_on_decl : Error<
++   "%0 attribute cannot be applied to a declaration">;
++ def warn_declspec_attribute_ignored : Warning<
++   "attribute %0 is ignored, place it after "
++   "\"%select{class|struct|interface|union|enum}1\" to apply attribute to "
++   "type declaration">, InGroup<IgnoredAttributes>;
++ def warn_attribute_precede_definition : Warning<
++   "attribute declaration must precede definition">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_void_function_method : Warning<
++   "attribute %0 cannot be applied to "
++   "%select{functions|Objective-C method}1 without return value">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_weak_on_field : Warning<
++   "__weak attribute cannot be specified on a field declaration">,
++   InGroup<IgnoredAttributes>;
++ def warn_gc_attribute_weak_on_local : Warning<
++   "Objective-C GC does not allow weak variables on the stack">,
++   InGroup<IgnoredAttributes>;
++ def warn_nsobject_attribute : Warning<
++   "'NSObject' attribute may be put on a typedef only; attribute is ignored">,
++   InGroup<NSobjectAttribute>;
++ def warn_independentclass_attribute : Warning<
++   "'objc_independent_class' attribute may be put on a typedef only; "
++   "attribute is ignored">,
++   InGroup<IndependentClassAttribute>;
++ def warn_ptr_independentclass_attribute : Warning<
++   "'objc_independent_class' attribute may be put on Objective-C object "
++   "pointer type only; attribute is ignored">,
++   InGroup<IndependentClassAttribute>;
++ def warn_attribute_weak_on_local : Warning<
++   "__weak attribute cannot be specified on an automatic variable when ARC "
++   "is not enabled">,
++   InGroup<IgnoredAttributes>;
++ def warn_weak_identifier_undeclared : Warning<
++   "weak identifier %0 never declared">;
++ def warn_attribute_cmse_entry_static : Warning<
++   "'cmse_nonsecure_entry' cannot be applied to functions with internal linkage">,
++   InGroup<IgnoredAttributes>;
++ def warn_cmse_nonsecure_union : Warning<
++   "passing union across security boundary via %select{parameter %1|return value}0 "
++   "may leak information">,
++   InGroup<DiagGroup<"cmse-union-leak">>;
++ def err_attribute_weak_static : Error<
++   "weak declaration cannot have internal linkage">;
++ def err_attribute_selectany_non_extern_data : Error<
++   "'selectany' can only be applied to data items with external linkage">;
++ def err_declspec_thread_on_thread_variable : Error<
++   "'__declspec(thread)' applied to variable that already has a "
++   "thread-local storage specifier">;
++ def err_attribute_dll_not_extern : Error<
++   "%q0 must have external linkage when declared %q1">;
++ def err_attribute_dll_thread_local : Error<
++   "%q0 cannot be thread local when declared %q1">;
++ def err_attribute_dll_lambda : Error<
++   "lambda cannot be declared %0">;
++ def warn_attribute_invalid_on_definition : Warning<
++   "'%0' attribute cannot be specified on a definition">,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_dll_redeclaration : Error<
++   "redeclaration of %q0 cannot add %q1 attribute">;
++ def warn_attribute_dll_redeclaration : Warning<
++   "redeclaration of %q0 should not add %q1 attribute">,
++   InGroup<DiagGroup<"dll-attribute-on-redeclaration">>;
++ def err_attribute_dllimport_function_definition : Error<
++   "dllimport cannot be applied to non-inline function definition">;
++ def err_attribute_dll_deleted : Error<
++   "attribute %q0 cannot be applied to a deleted function">;
++ def err_attribute_dllimport_data_definition : Error<
++   "definition of dllimport data">;
++ def err_attribute_dllimport_static_field_definition : Error<
++   "definition of dllimport static field not allowed">;
++ def warn_attribute_dllimport_static_field_definition : Warning<
++   "definition of dllimport static field">,
++   InGroup<DiagGroup<"dllimport-static-field-def">>;
++ def warn_attribute_dllexport_explicit_instantiation_decl : Warning<
++   "explicit instantiation declaration should not be 'dllexport'">,
++   InGroup<DiagGroup<"dllexport-explicit-instantiation-decl">>;
++ def warn_attribute_dllexport_explicit_instantiation_def : Warning<
++   "'dllexport' attribute ignored on explicit instantiation definition">,
++   InGroup<IgnoredAttributes>;
++ def warn_invalid_initializer_from_system_header : Warning<
++   "invalid constructor from class in system header, should not be explicit">,
++   InGroup<DiagGroup<"invalid-initializer-from-system-header">>;
++ def note_used_in_initialization_here : Note<"used in initialization here">;
++ def err_attribute_dll_member_of_dll_class : Error<
++   "attribute %q0 cannot be applied to member of %q1 class">;
++ def warn_attribute_dll_instantiated_base_class : Warning<
++   "propagating dll attribute to %select{already instantiated|explicitly specialized}0 "
++   "base class template without dll attribute is not supported">,
++   InGroup<DiagGroup<"unsupported-dll-base-class-template">>, DefaultIgnore;
++ def err_attribute_dll_ambiguous_default_ctor : Error<
++   "'__declspec(dllexport)' cannot be applied to more than one default constructor in %0">;
++ def err_attribute_weakref_not_static : Error<
++   "weakref declaration must have internal linkage">;
++ def err_attribute_weakref_not_global_context : Error<
++   "weakref declaration of %0 must be in a global context">;
++ def err_attribute_weakref_without_alias : Error<
++   "weakref declaration of %0 must also have an alias attribute">;
++ def err_alias_not_supported_on_darwin : Error <
++   "aliases are not supported on darwin">;
++ def warn_attribute_wrong_decl_type_str : Warning<
++   "%0 attribute only applies to %1">, InGroup<IgnoredAttributes>;
++ def err_attribute_wrong_decl_type_str : Error<
++   warn_attribute_wrong_decl_type_str.Text>;
++ def warn_attribute_wrong_decl_type : Warning<
++   "%0 attribute only applies to %select{"
++   "functions"
++   "|unions"
++   "|variables and functions"
++   "|functions and methods"
++   "|functions, methods and blocks"
++   "|functions, methods, and parameters"
++   "|variables"
++   "|variables and fields"
++   "|variables, data members and tag types"
++   "|types and namespaces"
++   "|variables, functions and classes"
++   "|kernel functions"
++   "|non-K&R-style functions}1">,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_wrong_decl_type : Error<warn_attribute_wrong_decl_type.Text>;
++ def warn_type_attribute_wrong_type : Warning<
++   "'%0' only applies to %select{function|pointer|"
++   "Objective-C object or block pointer}1 types; type here is %2">,
++   InGroup<IgnoredAttributes>;
++ def warn_incomplete_encoded_type : Warning<
++   "encoding of %0 type is incomplete because %1 component has unknown encoding">,
++   InGroup<DiagGroup<"encode-type">>;
++ def warn_gnu_inline_attribute_requires_inline : Warning<
++   "'gnu_inline' attribute requires function to be marked 'inline',"
++   " attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_gnu_inline_cplusplus_without_extern : Warning<
++   "'gnu_inline' attribute without 'extern' in C++ treated as externally"
++   " available, this changed in Clang 10">,
++   InGroup<DiagGroup<"gnu-inline-cpp-without-extern">>;
++ def err_attribute_vecreturn_only_vector_member : Error<
++   "the vecreturn attribute can only be used on a class or structure with one member, which must be a vector">;
++ def err_attribute_vecreturn_only_pod_record : Error<
++   "the vecreturn attribute can only be used on a POD (plain old data) class or structure (i.e. no virtual functions)">;
++ def err_cconv_change : Error<
++   "function declared '%0' here was previously declared "
++   "%select{'%2'|without calling convention}1">;
++ def warn_cconv_unsupported : Warning<
++   "%0 calling convention is not supported %select{"
++   // Use CallingConventionIgnoredReason Enum to specify these.
++   "for this target"
++   "|on variadic function"
++   "|on constructor/destructor"
++   "|on builtin function"
++   "}1">,
++   InGroup<IgnoredAttributes>;
++ def error_cconv_unsupported : Error<warn_cconv_unsupported.Text>;
++ def err_cconv_knr : Error<
++   "function with no prototype cannot use the %0 calling convention">;
++ def warn_cconv_knr : Warning<
++   err_cconv_knr.Text>,
++   InGroup<DiagGroup<"missing-prototype-for-cc">>;
++ def err_cconv_varargs : Error<
++   "variadic function cannot use %0 calling convention">;
++ def err_regparm_mismatch : Error<"function declared with regparm(%0) "
++   "attribute was previously declared "
++   "%plural{0:without the regparm|:with the regparm(%1)}1 attribute">;
++ def err_function_attribute_mismatch : Error<
++   "function declared with %0 attribute "
++   "was previously declared without the %0 attribute">;
++ def err_objc_precise_lifetime_bad_type : Error<
++   "objc_precise_lifetime only applies to retainable types; type here is %0">;
++ def warn_objc_precise_lifetime_meaningless : Error<
++   "objc_precise_lifetime is not meaningful for "
++   "%select{__unsafe_unretained|__autoreleasing}0 objects">;
++ def err_invalid_pcs : Error<"invalid PCS type">;
++ def warn_attribute_not_on_decl : Warning<
++   "%0 attribute ignored when parsing type">, InGroup<IgnoredAttributes>;
++ def err_base_specifier_attribute : Error<
++   "%0 attribute cannot be applied to a base specifier">;
++ def err_invalid_attribute_on_virtual_function : Error<
++   "%0 attribute cannot be applied to virtual functions">;
++ def warn_declspec_allocator_nonpointer : Warning<
++   "ignoring __declspec(allocator) because the function return type %0 is not "
++   "a pointer or reference type">, InGroup<IgnoredAttributes>;
++ def err_cconv_incomplete_param_type : Error<
++   "parameter %0 must have a complete type to use function %1 with the %2 "
++   "calling convention">;
++ def err_attribute_output_parameter : Error<
++   "attribute only applies to output parameters">;
++ 
++ def ext_cannot_use_trivial_abi : ExtWarn<
++   "'trivial_abi' cannot be applied to %0">, InGroup<IgnoredAttributes>;
++ def note_cannot_use_trivial_abi_reason : Note<
++   "'trivial_abi' is disallowed on %0 because %select{"
++   "its copy constructors and move constructors are all deleted|"
++   "it is polymorphic|"
++   "it has a base of a non-trivial class type|it has a virtual base|"
++   "it has a __weak field|it has a field of a non-trivial class type}1">;
++ 
++ // Availability attribute
++ def warn_availability_unknown_platform : Warning<
++   "unknown platform %0 in availability macro">, InGroup<Availability>;
++ def warn_availability_version_ordering : Warning<
++   "feature cannot be %select{introduced|deprecated|obsoleted}0 in %1 version "
++   "%2 before it was %select{introduced|deprecated|obsoleted}3 in version %4; "
++   "attribute ignored">, InGroup<Availability>;
++ def warn_mismatched_availability: Warning<
++   "availability does not match previous declaration">, InGroup<Availability>;
++ def warn_mismatched_availability_override : Warning<
++   "%select{|overriding }4method %select{introduced after|"
++   "deprecated before|obsoleted before}0 "
++   "%select{the protocol method it implements|overridden method}4 "
++   "on %1 (%2 vs. %3)">, InGroup<Availability>;
++ def warn_mismatched_availability_override_unavail : Warning<
++   "%select{|overriding }1method cannot be unavailable on %0 when "
++   "%select{the protocol method it implements|its overridden method}1 is "
++   "available">,
++   InGroup<Availability>;
++ def warn_availability_on_static_initializer : Warning<
++   "ignoring availability attribute %select{on '+load' method|"
++   "with constructor attribute|with destructor attribute}0">,
++   InGroup<Availability>;
++ def note_overridden_method : Note<
++   "overridden method is here">;
++ def warn_availability_swift_unavailable_deprecated_only : Warning<
++   "only 'unavailable' and 'deprecated' are supported for Swift availability">,
++   InGroup<Availability>;
++ def note_protocol_method : Note<
++   "protocol method is here">;
++ 
++ def warn_unguarded_availability :
++   Warning<"%0 is only available on %1 %2 or newer">,
++   InGroup<UnguardedAvailability>, DefaultIgnore;
++ def warn_unguarded_availability_new :
++   Warning<warn_unguarded_availability.Text>,
++   InGroup<UnguardedAvailabilityNew>;
++ def note_decl_unguarded_availability_silence : Note<
++   "annotate %select{%1|anonymous %1}0 with an availability attribute to silence this warning">;
++ def note_unguarded_available_silence : Note<
++   "enclose %0 in %select{an @available|a __builtin_available}1 check to silence"
++   " this warning">;
++ def warn_at_available_unchecked_use : Warning<
++   "%select{@available|__builtin_available}0 does not guard availability here; "
++   "use if (%select{@available|__builtin_available}0) instead">,
++   InGroup<DiagGroup<"unsupported-availability-guard">>;
++ 
++ def warn_missing_sdksettings_for_availability_checking : Warning<
++   "%0 availability is ignored without a valid 'SDKSettings.json' in the SDK">,
++   InGroup<DiagGroup<"ignored-availability-without-sdk-settings">>;
++ 
++ // Thread Safety Attributes
++ def warn_thread_attribute_ignored : Warning<
++   "ignoring %0 attribute because its argument is invalid">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def warn_thread_attribute_not_on_non_static_member : Warning<
++   "%0 attribute without capability arguments can only be applied to non-static "
++   "methods of a class">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def warn_thread_attribute_not_on_capability_member : Warning<
++   "%0 attribute without capability arguments refers to 'this', but %1 isn't "
++   "annotated with 'capability' or 'scoped_lockable' attribute">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def warn_thread_attribute_argument_not_lockable : Warning<
++   "%0 attribute requires arguments whose type is annotated "
++   "with 'capability' attribute; type here is %1">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def warn_thread_attribute_decl_not_lockable : Warning<
++   "%0 attribute can only be applied in a context annotated "
++   "with 'capability' attribute">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def warn_thread_attribute_decl_not_pointer : Warning<
++   "%0 only applies to pointer types; type here is %1">,
++   InGroup<ThreadSafetyAttributes>, DefaultIgnore;
++ def err_attribute_argument_out_of_bounds_extra_info : Error<
++   "%0 attribute parameter %1 is out of bounds: "
++   "%plural{0:no parameters to index into|"
++   "1:can only be 1, since there is one parameter|"
++   ":must be between 1 and %2}2">;
++ 
++ // Thread Safety Analysis
++ def warn_unlock_but_no_lock : Warning<"releasing %0 '%1' that was not held">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_unlock_kind_mismatch : Warning<
++   "releasing %0 '%1' using %select{shared|exclusive}2 access, expected "
++   "%select{shared|exclusive}3 access">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_double_lock : Warning<"acquiring %0 '%1' that is already held">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_no_unlock : Warning<
++   "%0 '%1' is still held at the end of function">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_expecting_locked : Warning<
++   "expecting %0 '%1' to be held at the end of function">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ // FIXME: improve the error message about locks not in scope
++ def warn_lock_some_predecessors : Warning<
++   "%0 '%1' is not held on every path through here">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_expecting_lock_held_on_loop : Warning<
++   "expecting %0 '%1' to be held at start of each loop">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def note_locked_here : Note<"%0 acquired here">;
++ def note_unlocked_here : Note<"%0 released here">;
++ def warn_lock_exclusive_and_shared : Warning<
++   "%0 '%1' is acquired exclusively and shared in the same scope">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def note_lock_exclusive_and_shared : Note<
++   "the other acquisition of %0 '%1' is here">;
++ def warn_variable_requires_any_lock : Warning<
++   "%select{reading|writing}1 variable %0 requires holding "
++   "%select{any mutex|any mutex exclusively}1">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_var_deref_requires_any_lock : Warning<
++   "%select{reading|writing}1 the value pointed to by %0 requires holding "
++   "%select{any mutex|any mutex exclusively}1">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_fun_excludes_mutex : Warning<
++   "cannot call function '%1' while %0 '%2' is held">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_cannot_resolve_lock : Warning<
++   "cannot resolve lock expression">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_acquired_before : Warning<
++   "%0 '%1' must be acquired before '%2'">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_acquired_before_after_cycle : Warning<
++   "Cycle in acquired_before/after dependencies, starting with '%0'">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ 
++ 
++ // Thread safety warnings negative capabilities
++ def warn_acquire_requires_negative_cap : Warning<
++   "acquiring %0 '%1' requires negative capability '%2'">,
++   InGroup<ThreadSafetyNegative>, DefaultIgnore;
++ def warn_fun_requires_negative_cap : Warning<
++   "calling function %0 requires negative capability '%1'">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ 
++ // Thread safety warnings on pass by reference
++ def warn_guarded_pass_by_reference : Warning<
++   "passing variable %1 by reference requires holding %0 "
++   "%select{'%2'|'%2' exclusively}3">,
++   InGroup<ThreadSafetyReference>, DefaultIgnore;
++ def warn_pt_guarded_pass_by_reference : Warning<
++   "passing the value that %1 points to by reference requires holding %0 "
++   "%select{'%2'|'%2' exclusively}3">,
++   InGroup<ThreadSafetyReference>, DefaultIgnore;
++ 
++ // Imprecise thread safety warnings
++ def warn_variable_requires_lock : Warning<
++   "%select{reading|writing}3 variable %1 requires holding %0 "
++   "%select{'%2'|'%2' exclusively}3">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_var_deref_requires_lock : Warning<
++   "%select{reading|writing}3 the value pointed to by %1 requires "
++   "holding %0 %select{'%2'|'%2' exclusively}3">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ def warn_fun_requires_lock : Warning<
++   "calling function %1 requires holding %0 %select{'%2'|'%2' exclusively}3">,
++   InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
++ 
++ // Precise thread safety warnings
++ def warn_variable_requires_lock_precise :
++   Warning<warn_variable_requires_lock.Text>,
++   InGroup<ThreadSafetyPrecise>, DefaultIgnore;
++ def warn_var_deref_requires_lock_precise :
++   Warning<warn_var_deref_requires_lock.Text>,
++   InGroup<ThreadSafetyPrecise>, DefaultIgnore;
++ def warn_fun_requires_lock_precise :
++   Warning<warn_fun_requires_lock.Text>,
++   InGroup<ThreadSafetyPrecise>, DefaultIgnore;
++ def note_found_mutex_near_match : Note<"found near match '%0'">;
++ 
++ // Verbose thread safety warnings
++ def warn_thread_safety_verbose : Warning<"thread safety verbose warning">,
++   InGroup<ThreadSafetyVerbose>, DefaultIgnore;
++ def note_thread_warning_in_fun : Note<"thread warning in function %0">;
++ def note_guarded_by_declared_here : Note<"guarded_by declared here">;
++ 
++ // Dummy warning that will trigger "beta" warnings from the analysis if enabled.
++ def warn_thread_safety_beta : Warning<"thread safety beta warning">,
++   InGroup<ThreadSafetyBeta>, DefaultIgnore;
++ 
++ // Consumed warnings
++ def warn_use_in_invalid_state : Warning<
++   "invalid invocation of method '%0' on object '%1' while it is in the '%2' "
++   "state">, InGroup<Consumed>, DefaultIgnore;
++ def warn_use_of_temp_in_invalid_state : Warning<
++   "invalid invocation of method '%0' on a temporary object while it is in the "
++   "'%1' state">, InGroup<Consumed>, DefaultIgnore;
++ def warn_attr_on_unconsumable_class : Warning<
++   "consumed analysis attribute is attached to member of class %0 which isn't "
++   "marked as consumable">, InGroup<Consumed>, DefaultIgnore;
++ def warn_return_typestate_for_unconsumable_type : Warning<
++   "return state set for an unconsumable type '%0'">, InGroup<Consumed>,
++   DefaultIgnore;
++ def warn_return_typestate_mismatch : Warning<
++   "return value not in expected state; expected '%0', observed '%1'">,
++   InGroup<Consumed>, DefaultIgnore;
++ def warn_loop_state_mismatch : Warning<
++   "state of variable '%0' must match at the entry and exit of loop">,
++   InGroup<Consumed>, DefaultIgnore;
++ def warn_param_return_typestate_mismatch : Warning<
++   "parameter '%0' not in expected state when the function returns: expected "
++   "'%1', observed '%2'">, InGroup<Consumed>, DefaultIgnore;
++ def warn_param_typestate_mismatch : Warning<
++   "argument not in expected state; expected '%0', observed '%1'">,
++   InGroup<Consumed>, DefaultIgnore;
++ 
++ // no_sanitize attribute
++ def warn_unknown_sanitizer_ignored : Warning<
++   "unknown sanitizer '%0' ignored">, InGroup<UnknownSanitizers>;
++ 
++ def warn_impcast_vector_scalar : Warning<
++   "implicit conversion turns vector to scalar: %0 to %1">,
++   InGroup<Conversion>, DefaultIgnore;
++ def warn_impcast_complex_scalar : Warning<
++   "implicit conversion discards imaginary component: %0 to %1">,
++   InGroup<Conversion>, DefaultIgnore;
++ def err_impcast_complex_scalar : Error<
++   "implicit conversion from %0 to %1 is not permitted in C++">;
++ def warn_impcast_float_precision : Warning<
++   "implicit conversion loses floating-point precision: %0 to %1">,
++   InGroup<ImplicitFloatConversion>, DefaultIgnore;
++ def warn_impcast_float_result_precision : Warning<
++   "implicit conversion when assigning computation result loses floating-point precision: %0 to %1">,
++   InGroup<ImplicitFloatConversion>, DefaultIgnore;
++ def warn_impcast_double_promotion : Warning<
++   "implicit conversion increases floating-point precision: %0 to %1">,
++   InGroup<DoublePromotion>, DefaultIgnore;
++ def warn_impcast_integer_sign : Warning<
++   "implicit conversion changes signedness: %0 to %1">,
++   InGroup<SignConversion>, DefaultIgnore;
++ def warn_impcast_integer_sign_conditional : Warning<
++   "operand of ? changes signedness: %0 to %1">,
++   InGroup<SignConversion>, DefaultIgnore;
++ def warn_impcast_integer_precision : Warning<
++   "implicit conversion loses integer precision: %0 to %1">,
++   InGroup<ImplicitIntConversion>, DefaultIgnore;
++ def warn_impcast_high_order_zero_bits : Warning<
++   "higher order bits are zeroes after implicit conversion">,
++   InGroup<ImplicitIntConversion>, DefaultIgnore;
++ def warn_impcast_nonnegative_result : Warning<
++   "the resulting value is always non-negative after implicit conversion">,
++   InGroup<SignConversion>, DefaultIgnore;
++ def warn_impcast_integer_64_32 : Warning<
++   "implicit conversion loses integer precision: %0 to %1">,
++   InGroup<Shorten64To32>, DefaultIgnore;
++ def warn_impcast_integer_precision_constant : Warning<
++   "implicit conversion from %2 to %3 changes value from %0 to %1">,
++   InGroup<ConstantConversion>;
++ def warn_impcast_bitfield_precision_constant : Warning<
++   "implicit truncation from %2 to bit-field changes value from %0 to %1">,
++   InGroup<BitFieldConstantConversion>;
++ def warn_impcast_constant_value_to_objc_bool : Warning<
++   "implicit conversion from constant value %0 to 'BOOL'; "
++   "the only well defined values for 'BOOL' are YES and NO">,
++   InGroup<ObjCBoolConstantConversion>;
++ 
++ def warn_impcast_fixed_point_range : Warning<
++   "implicit conversion from %0 cannot fit within the range of values for %1">,
++   InGroup<ImplicitFixedPointConversion>;
++ 
++ def warn_impcast_literal_float_to_integer : Warning<
++   "implicit conversion from %0 to %1 changes value from %2 to %3">,
++   InGroup<LiteralConversion>;
++ def warn_impcast_literal_float_to_integer_out_of_range : Warning<
++   "implicit conversion of out of range value from %0 to %1 is undefined">,
++   InGroup<LiteralConversion>;
++ def warn_impcast_float_integer : Warning<
++   "implicit conversion turns floating-point number into integer: %0 to %1">,
++   InGroup<FloatConversion>, DefaultIgnore;
++ def warn_impcast_float_to_objc_signed_char_bool : Warning<
++   "implicit conversion from floating-point type %0 to 'BOOL'">,
++   InGroup<ObjCSignedCharBoolImplicitFloatConversion>;
++ def warn_impcast_int_to_objc_signed_char_bool : Warning<
++   "implicit conversion from integral type %0 to 'BOOL'">,
++   InGroup<ObjCSignedCharBoolImplicitIntConversion>, DefaultIgnore;
++ 
++ // Implicit int -> float conversion precision loss warnings.
++ def warn_impcast_integer_float_precision : Warning<
++   "implicit conversion from %0 to %1 may lose precision">,
++   InGroup<ImplicitIntFloatConversion>, DefaultIgnore;
++ def warn_impcast_integer_float_precision_constant : Warning<
++   "implicit conversion from %2 to %3 changes value from %0 to %1">,
++   InGroup<ImplicitConstIntFloatConversion>;
++ 
++ def warn_impcast_float_to_integer : Warning<
++   "implicit conversion from %0 to %1 changes value from %2 to %3">,
++   InGroup<FloatOverflowConversion>, DefaultIgnore;
++ def warn_impcast_float_to_integer_out_of_range : Warning<
++   "implicit conversion of out of range value from %0 to %1 is undefined">,
++   InGroup<FloatOverflowConversion>, DefaultIgnore;
++ def warn_impcast_float_to_integer_zero : Warning<
++   "implicit conversion from %0 to %1 changes non-zero value from %2 to %3">,
++   InGroup<FloatZeroConversion>, DefaultIgnore;
++ 
++ def warn_impcast_string_literal_to_bool : Warning<
++   "implicit conversion turns string literal into bool: %0 to %1">,
++   InGroup<StringConversion>, DefaultIgnore;
++ def warn_impcast_different_enum_types : Warning<
++   "implicit conversion from enumeration type %0 to different enumeration type "
++   "%1">, InGroup<EnumConversion>;
++ def warn_impcast_bool_to_null_pointer : Warning<
++     "initialization of pointer of type %0 to null from a constant boolean "
++     "expression">, InGroup<BoolConversion>;
++ def warn_non_literal_null_pointer : Warning<
++     "expression which evaluates to zero treated as a null pointer constant of "
++     "type %0">, InGroup<NonLiteralNullConversion>;
++ def warn_pointer_compare : Warning<
++     "comparing a pointer to a null character constant; did you mean "
++     "to compare to %select{NULL|(void *)0}0?">,
++     InGroup<DiagGroup<"pointer-compare">>;
++ def warn_impcast_null_pointer_to_integer : Warning<
++     "implicit conversion of %select{NULL|nullptr}0 constant to %1">,
++     InGroup<NullConversion>;
++ def warn_impcast_floating_point_to_bool : Warning<
++     "implicit conversion turns floating-point number into bool: %0 to %1">,
++     InGroup<ImplicitConversionFloatingPointToBool>;
++ def ext_ms_impcast_fn_obj : ExtWarn<
++   "implicit conversion between pointer-to-function and pointer-to-object is a "
++   "Microsoft extension">, InGroup<MicrosoftCast>;
++ 
++ def warn_impcast_pointer_to_bool : Warning<
++     "address of%select{| function| array}0 '%1' will always evaluate to "
++     "'true'">,
++     InGroup<PointerBoolConversion>;
++ def warn_cast_nonnull_to_bool : Warning<
++     "nonnull %select{function call|parameter}0 '%1' will evaluate to "
++     "'true' on first encounter">,
++     InGroup<PointerBoolConversion>;
++ def warn_this_bool_conversion : Warning<
++   "'this' pointer cannot be null in well-defined C++ code; pointer may be "
++   "assumed to always convert to true">, InGroup<UndefinedBoolConversion>;
++ def warn_address_of_reference_bool_conversion : Warning<
++   "reference cannot be bound to dereferenced null pointer in well-defined C++ "
++   "code; pointer may be assumed to always convert to true">,
++   InGroup<UndefinedBoolConversion>;
++ 
++ def warn_xor_used_as_pow : Warning<
++   "result of '%0' is %1; did you mean exponentiation?">,
++   InGroup<XorUsedAsPow>;
++ def warn_xor_used_as_pow_base_extra : Warning<
++   "result of '%0' is %1; did you mean '%2' (%3)?">,
++   InGroup<XorUsedAsPow>;
++ def warn_xor_used_as_pow_base : Warning<
++   "result of '%0' is %1; did you mean '%2'?">,
++   InGroup<XorUsedAsPow>;
++ def note_xor_used_as_pow_silence : Note<
++   "replace expression with '%0' %select{|or use 'xor' instead of '^' }1to silence this warning">;
++ 
++ def warn_null_pointer_compare : Warning<
++     "comparison of %select{address of|function|array}0 '%1' %select{not |}2"
++     "equal to a null pointer is always %select{true|false}2">,
++     InGroup<TautologicalPointerCompare>;
++ def warn_nonnull_expr_compare : Warning<
++     "comparison of nonnull %select{function call|parameter}0 '%1' "
++     "%select{not |}2equal to a null pointer is '%select{true|false}2' on first "
++     "encounter">,
++     InGroup<TautologicalPointerCompare>;
++ def warn_this_null_compare : Warning<
++   "'this' pointer cannot be null in well-defined C++ code; comparison may be "
++   "assumed to always evaluate to %select{true|false}0">,
++   InGroup<TautologicalUndefinedCompare>;
++ def warn_address_of_reference_null_compare : Warning<
++   "reference cannot be bound to dereferenced null pointer in well-defined C++ "
++   "code; comparison may be assumed to always evaluate to "
++   "%select{true|false}0">,
++   InGroup<TautologicalUndefinedCompare>;
++ def note_reference_is_return_value : Note<"%0 returns a reference">;
++ 
++ def note_pointer_declared_here : Note<
++   "pointer %0 declared here">;
++ def warn_division_sizeof_ptr : Warning<
++   "'%0' will return the size of the pointer, not the array itself">,
++   InGroup<DiagGroup<"sizeof-pointer-div">>;
++ def warn_division_sizeof_array : Warning<
++   "expression does not compute the number of elements in this array; element "
++   "type is %0, not %1">,
++   InGroup<DiagGroup<"sizeof-array-div">>;
++ 
++ def note_function_warning_silence : Note<
++     "prefix with the address-of operator to silence this warning">;
++ def note_function_to_function_call : Note<
++     "suffix with parentheses to turn this into a function call">;
++ def warn_impcast_objective_c_literal_to_bool : Warning<
++     "implicit boolean conversion of Objective-C object literal always "
++     "evaluates to true">,
++     InGroup<ObjCLiteralConversion>;
++ 
++ def warn_cast_align : Warning<
++   "cast from %0 to %1 increases required alignment from %2 to %3">,
++   InGroup<CastAlign>, DefaultIgnore;
++ def warn_old_style_cast : Warning<
++   "use of old-style cast">, InGroup<OldStyleCast>, DefaultIgnore;
++ 
++ // Separate between casts to void* and non-void* pointers.
++ // Some APIs use (abuse) void* for something like a user context,
++ // and often that value is an integer even if it isn't a pointer itself.
++ // Having a separate warning flag allows users to control the warning
++ // for their workflow.
++ def warn_int_to_pointer_cast : Warning<
++   "cast to %1 from smaller integer type %0">,
++   InGroup<IntToPointerCast>;
++ def warn_int_to_void_pointer_cast : Warning<
++   "cast to %1 from smaller integer type %0">,
++   InGroup<IntToVoidPointerCast>;
++ def warn_pointer_to_int_cast : Warning<
++   "cast to smaller integer type %1 from %0">,
++   InGroup<PointerToIntCast>;
++ def warn_pointer_to_enum_cast : Warning<
++   warn_pointer_to_int_cast.Text>,
++   InGroup<PointerToEnumCast>;
++ def warn_void_pointer_to_int_cast : Warning<
++   "cast to smaller integer type %1 from %0">,
++   InGroup<VoidPointerToIntCast>;
++ def warn_void_pointer_to_enum_cast : Warning<
++   warn_void_pointer_to_int_cast.Text>,
++   InGroup<VoidPointerToEnumCast>;
++ 
++ def warn_attribute_ignored_for_field_of_type : Warning<
++   "%0 attribute ignored for field of type %1">,
++   InGroup<IgnoredAttributes>;
++ def warn_no_underlying_type_specified_for_enum_bitfield : Warning<
++   "enums in the Microsoft ABI are signed integers by default; consider giving "
++   "the enum %0 an unsigned underlying type to make this code portable">,
++   InGroup<SignedEnumBitfield>, DefaultIgnore;
++ def warn_attribute_packed_for_bitfield : Warning<
++   "'packed' attribute was ignored on bit-fields with single-byte alignment "
++   "in older versions of GCC and Clang">,
++   InGroup<DiagGroup<"attribute-packed-for-bitfield">>;
++ def warn_transparent_union_attribute_field_size_align : Warning<
++   "%select{alignment|size}0 of field %1 (%2 bits) does not match the "
++   "%select{alignment|size}0 of the first field in transparent union; "
++   "transparent_union attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def note_transparent_union_first_field_size_align : Note<
++   "%select{alignment|size}0 of first field is %1 bits">;
++ def warn_transparent_union_attribute_not_definition : Warning<
++   "transparent_union attribute can only be applied to a union definition; "
++   "attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_transparent_union_attribute_floating : Warning<
++   "first field of a transparent union cannot have %select{floating point|"
++   "vector}0 type %1; transparent_union attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_transparent_union_attribute_zero_fields : Warning<
++   "transparent union definition must contain at least one field; "
++   "transparent_union attribute ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_type_not_supported : Warning<
++   "%0 attribute argument not supported: %1">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_unknown_visibility : Warning<"unknown visibility %0">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_protected_visibility :
++   Warning<"target does not support 'protected' visibility; using 'default'">,
++   InGroup<DiagGroup<"unsupported-visibility">>;
++ def err_mismatched_visibility: Error<"visibility does not match previous declaration">;
++ def note_previous_attribute : Note<"previous attribute is here">;
++ def note_conflicting_attribute : Note<"conflicting attribute is here">;
++ def note_attribute : Note<"attribute is here">;
++ def err_mismatched_ms_inheritance : Error<
++   "inheritance model does not match %select{definition|previous declaration}0">;
++ def warn_ignored_ms_inheritance : Warning<
++   "inheritance model ignored on %select{primary template|partial specialization}0">,
++   InGroup<IgnoredAttributes>;
++ def note_previous_ms_inheritance : Note<
++   "previous inheritance model specified here">;
++ def err_machine_mode : Error<"%select{unknown|unsupported}0 machine mode %1">;
++ def err_mode_not_primitive : Error<
++   "mode attribute only supported for integer and floating-point types">;
++ def err_mode_wrong_type : Error<
++   "type of machine mode does not match type of base type">;
++ def warn_vector_mode_deprecated : Warning<
++   "specifying vector types with the 'mode' attribute is deprecated; "
++   "use the 'vector_size' attribute instead">,
++   InGroup<DeprecatedAttributes>;
++ def err_complex_mode_vector_type : Error<
++   "type of machine mode does not support base vector types">;
++ def err_enum_mode_vector_type : Error<
++   "mode %0 is not supported for enumeration types">;
++ def warn_attribute_nonnull_no_pointers : Warning<
++   "'nonnull' attribute applied to function with no pointer arguments">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_nonnull_parm_no_args : Warning<
++   "'nonnull' attribute when used on parameters takes no arguments">,
++   InGroup<IgnoredAttributes>;
++ def note_declared_nonnull : Note<
++   "declared %select{'returns_nonnull'|'nonnull'}0 here">;
++ def warn_attribute_sentinel_named_arguments : Warning<
++   "'sentinel' attribute requires named arguments">,
++   InGroup<IgnoredAttributes>;
++ def warn_attribute_sentinel_not_variadic : Warning<
++   "'sentinel' attribute only supported for variadic %select{functions|blocks}0">,
++   InGroup<IgnoredAttributes>;
++ def warn_deprecated_ignored_on_using : Warning<
++   "%0 currently has no effect on a using declaration">,
++   InGroup<IgnoredAttributes>;
++ def err_attribute_sentinel_less_than_zero : Error<
++   "'sentinel' parameter 1 less than zero">;
++ def err_attribute_sentinel_not_zero_or_one : Error<
++   "'sentinel' parameter 2 not 0 or 1">;
++ def warn_cleanup_ext : Warning<
++   "GCC does not allow the 'cleanup' attribute argument to be anything other "
++   "than a simple identifier">,
++   InGroup<GccCompat>;
++ def err_attribute_cleanup_arg_not_function : Error<
++   "'cleanup' argument %select{|%1 |%1 }0is not a %select{||single }0function">;
++ def err_attribute_cleanup_func_must_take_one_arg : Error<
++   "'cleanup' function %0 must take 1 parameter">;
++ def err_attribute_cleanup_func_arg_incompatible_type : Error<
++   "'cleanup' function %0 parameter has "
++   "%diff{type $ which is incompatible with type $|incompatible type}1,2">;
++ def err_attribute_regparm_wrong_platform : Error<
++   "'regparm' is not valid on this platform">;
++ def err_attribute_regparm_invalid_number : Error<
++   "'regparm' parameter must be between 0 and %0 inclusive">;
++ def err_attribute_not_supported_in_lang : Error<
++   "%0 attribute is not supported in %select{C|C++|Objective-C}1">;
++ def err_attribute_not_supported_on_arch
++     : Error<"%0 attribute is not supported on '%1'">;
++ def warn_gcc_ignores_type_attr : Warning<
++   "GCC does not allow the %0 attribute to be written on a type">,
++   InGroup<GccCompat>;
++ 
++ // Clang-Specific Attributes
++ def warn_attribute_iboutlet : Warning<
++   "%0 attribute can only be applied to instance variables or properties">,
++   InGroup<IgnoredAttributes>;
++ def err_iboutletcollection_type : Error<
++   "invalid type %0 as argument of iboutletcollection attribute">;
++ def err_iboutletcollection_builtintype : Error<
++   "type argument of iboutletcollection attribute cannot be a builtin type">;
++ def warn_iboutlet_object_type : Warning<
++   "%select{instance variable|property}2 with %0 attribute must "
++   "be an object type (invalid %1)">, InGroup<ObjCInvalidIBOutletProperty>;
++ def warn_iboutletcollection_property_assign : Warning<
++   "IBOutletCollection properties should be copy/strong and not assign">,
++   InGroup<ObjCInvalidIBOutletProperty>;
++ 
++ def err_attribute_overloadable_mismatch : Error<
++   "redeclaration of %0 must %select{not |}1have the 'overloadable' attribute">;
++ def note_attribute_overloadable_prev_overload : Note<
++   "previous %select{unmarked |}0overload of function is here">;
++ def err_attribute_overloadable_no_prototype : Error<
++   "'overloadable' function %0 must have a prototype">;
++ def err_attribute_overloadable_multiple_unmarked_overloads : Error<
++   "at most one overload for a given name may lack the 'overloadable' "
++   "attribute">;
++ def warn_attribute_no_builtin_invalid_builtin_name : Warning<
++   "'%0' is not a valid builtin name for %1">,
++   InGroup<DiagGroup<"invalid-no-builtin-names">>;
++ def err_attribute_no_builtin_wildcard_or_builtin_name : Error<
++   "empty %0 cannot be composed with named ones">;
++ def err_attribute_no_builtin_on_non_definition : Error<
++   "%0 attribute is permitted on definitions only">;
++ def err_attribute_no_builtin_on_defaulted_deleted_function : Error<
++   "%0 attribute has no effect on defaulted or deleted functions">;
++ def warn_ns_attribute_wrong_return_type : Warning<
++   "%0 attribute only applies to %select{functions|methods|properties}1 that "
++   "return %select{an Objective-C object|a pointer|a non-retainable pointer}2">,
++   InGroup<IgnoredAttributes>;
++ def err_ns_attribute_wrong_parameter_type : Error<
++   "%0 attribute only applies to "
++   "%select{Objective-C object|pointer|pointer-to-CF-pointer}1 parameters">;
++ def warn_ns_attribute_wrong_parameter_type : Warning<
++   "%0 attribute only applies to "
++   "%select{Objective-C object|pointer|pointer-to-CF-pointer|pointer/reference-to-OSObject-pointer}1 parameters">,
++   InGroup<IgnoredAttributes>;
++ def warn_objc_requires_super_protocol : Warning<
++   "%0 attribute cannot be applied to %select{methods in protocols|dealloc}1">,
++   InGroup<DiagGroup<"requires-super-attribute">>;
++ def note_protocol_decl : Note<
++   "protocol is declared here">;
++ def note_protocol_decl_undefined : Note<
++   "protocol %0 has no definition">;
++ def err_attribute_preferred_name_arg_invalid : Error<
++   "argument %0 to 'preferred_name' attribute is not a typedef for "
++   "a specialization of %1">;
++ def err_attribute_builtin_alias : Error<
++   "%0 attribute can only be applied to a ARM or RISC-V builtin">;
++ 
++ // called-once attribute diagnostics.
++ def err_called_once_attribute_wrong_type : Error<
++   "'called_once' attribute only applies to function-like parameters">;
++ 
++ def warn_completion_handler_never_called : Warning<
++   "%select{|captured }1completion handler is never called">,
++   InGroup<CompletionHandler>, DefaultIgnore;
++ def warn_called_once_never_called : Warning<
++   "%select{|captured }1%0 parameter marked 'called_once' is never called">,
++   InGroup<CalledOnceParameter>;
++ 
++ def warn_completion_handler_never_called_when : Warning<
++   "completion handler is never %select{used|called}1 when "
++   "%select{taking true branch|taking false branch|"
++   "handling this case|none of the cases applies|"
++   "entering the loop|skipping the loop|taking one of the branches}2">,
++   InGroup<CompletionHandler>, DefaultIgnore;
++ def warn_called_once_never_called_when : Warning<
++   "%0 parameter marked 'called_once' is never %select{used|called}1 when "
++   "%select{taking true branch|taking false branch|"
++   "handling this case|none of the cases applies|"
++   "entering the loop|skipping the loop|taking one of the branches}2">,
++   InGroup<CalledOnceParameter>;
++ 
++ def warn_completion_handler_called_twice : Warning<
++   "completion handler is called twice">,
++   InGroup<CompletionHandler>, DefaultIgnore;
++ def warn_called_once_gets_called_twice : Warning<
++   "%0 parameter marked 'called_once' is called twice">,
++   InGroup<CalledOnceParameter>;
++ def note_called_once_gets_called_twice : Note<
++   "previous call is here%select{; set to nil to indicate "
++   "it cannot be called afterwards|}0">;
++ 
++ // objc_designated_initializer attribute diagnostics.
++ def warn_objc_designated_init_missing_super_call : Warning<
++   "designated initializer missing a 'super' call to a designated initializer of the super class">,
++   InGroup<ObjCDesignatedInit>;
++ def note_objc_designated_init_marked_here : Note<
++   "method marked as designated initializer of the class here">;
++ def warn_objc_designated_init_non_super_designated_init_call : Warning<
++   "designated initializer should only invoke a designated initializer on 'super'">,
++   InGroup<ObjCDesignatedInit>;
++ def warn_objc_designated_init_non_designated_init_call : Warning<
++   "designated initializer invoked a non-designated initializer">,
++   InGroup<ObjCDesignatedInit>;
++ def warn_objc_secondary_init_super_init_call : Warning<
++   "convenience initializer should not invoke an initializer on 'super'">,
++   InGroup<ObjCDesignatedInit>;
++ def warn_objc_secondary_init_missing_init_call : Warning<
++   "convenience initializer missing a 'self' call to another initializer">,
++   InGroup<ObjCDesignatedInit>;
++ def warn_objc_implementation_missing_designated_init_override : Warning<
++   "method override for the designated initializer of the superclass %objcinstance0 not found">,
++   InGroup<ObjCDesignatedInit>;
++ def err_designated_init_attr_non_init : Error<
++   "'objc_designated_initializer' attribute only applies to init methods "
++   "of interface or class extension declarations">;
++ 
++ // objc_bridge attribute diagnostics.
++ def err_objc_attr_not_id : Error<
++   "parameter of %0 attribute must be a single name of an Objective-C %select{class|protocol}1">;
++ def err_objc_attr_typedef_not_id : Error<
++   "parameter of %0 attribute must be 'id' when used on a typedef">;
++ def err_objc_attr_typedef_not_void_pointer : Error<
++   "'objc_bridge(id)' is only allowed on structs and typedefs of void pointers">;
++ def err_objc_cf_bridged_not_interface : Error<
++   "CF object of type %0 is bridged to %1, which is not an Objective-C class">;
++ def err_objc_ns_bridged_invalid_cfobject : Error<
++   "ObjectiveC object of type %0 is bridged to %1, which is not valid CF object">;
++ def warn_objc_invalid_bridge : Warning<
++   "%0 bridges to %1, not %2">, InGroup<ObjCBridge>;
++ def warn_objc_invalid_bridge_to_cf : Warning<
++   "%0 cannot bridge to %1">, InGroup<ObjCBridge>;
++ 
++ // objc_bridge_related attribute diagnostics.
++ def err_objc_bridged_related_invalid_class : Error<
++   "could not find Objective-C class %0 to convert %1 to %2">;
++ def err_objc_bridged_related_invalid_class_name : Error<
++   "%0 must be name of an Objective-C class to be able to convert %1 to %2">;
++ def err_objc_bridged_related_known_method : Error<
++  "%0 must be explicitly converted to %1; use %select{%objcclass2|%objcinstance2}3 "
++  "method for this conversion">;
++ 
++ def err_objc_attr_protocol_requires_definition : Error<
++   "attribute %0 can only be applied to @protocol definitions, not forward declarations">;
++ 
++ // Swift attributes.
++ def warn_attr_swift_name_function
++   : Warning<"%0 attribute argument must be a string literal specifying a Swift function name">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_invalid_identifier
++   : Warning<"%0 attribute has invalid identifier for the %select{base|context|parameter}1 name">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_decl_kind
++   : Warning<"%0 attribute cannot be applied to this declaration">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_subscript_invalid_parameter
++   : Warning<"%0 attribute for 'subscript' must %select{be a getter or setter|"
++         "have at least one parameter|"
++         "have a 'self:' parameter}1">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_missing_parameters
++   : Warning<"%0 attribute is missing parameter label clause">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_setter_parameters
++   : Warning<"%0 attribute for setter must have one parameter for new value">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_multiple_selfs
++   : Warning<"%0 attribute cannot specify more than one 'self:' parameter">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_getter_parameters
++   : Warning<"%0 attribute for getter must not have any parameters besides 'self:'">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_subscript_setter_no_newValue
++   : Warning<"%0 attribute for 'subscript' setter must have a 'newValue:' parameter">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_subscript_setter_multiple_newValues
++   : Warning<"%0 attribute for 'subscript' setter cannot have multiple 'newValue:' parameters">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_subscript_getter_newValue
++   : Warning<"%0 attribute for 'subscript' getter cannot have a 'newValue:' parameter">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_num_params
++   : Warning<"too %select{few|many}0 parameters in the signature specified by "
++             "the %1 attribute (expected %2; got %3)">,
++     InGroup<SwiftNameAttribute>;
++ def warn_attr_swift_name_decl_missing_params
++   : Warning<"%0 attribute cannot be applied to a %select{function|method}1 "
++             "with no parameters">,
++     InGroup<SwiftNameAttribute>;
++ 
++ def err_attr_swift_error_no_error_parameter : Error<
++   "%0 attribute can only be applied to a %select{function|method}1 with an "
++   "error parameter">;
++ def err_attr_swift_error_return_type : Error<
++   "%0 attribute with '%1' convention can only be applied to a "
++   "%select{function|method}2 returning %select{an integral type|a pointer}3">;
++ 
++ def err_swift_async_no_access : Error<
++   "first argument to 'swift_async' must be either 'none', 'swift_private', or "
++   "'not_swift_private'">;
++ def err_swift_async_bad_block_type : Error<
++   "'swift_async' completion handler parameter must have block type returning"
++   " 'void', type here is %0">;
++ 
++ def err_swift_async_error_without_swift_async : Error<
++   "%0 attribute must be applied to a %select{function|method}1 annotated "
++   "with non-'none' attribute 'swift_async'">;
++ def err_swift_async_error_no_error_parameter : Error<
++   "%0 attribute with 'nonnull_error' convention can only be applied to a "
++   "%select{function|method}1 with a completion handler with an error "
++   "parameter">;
++ def err_swift_async_error_non_integral : Error<
++   "%0 attribute with '%1' convention must have an integral-typed parameter "
++   "in completion handler at index %2, type here is %3">;
++ 
++ def warn_ignored_objc_externally_retained : Warning<
++   "'objc_externally_retained' can only be applied to local variables "
++   "%select{of retainable type|with strong ownership}0">,
++   InGroup<IgnoredAttributes>;
++ 
++ // Function Parameter Semantic Analysis.
++ def err_param_with_void_type : Error<"argument may not have 'void' type">;
++ def err_void_only_param : Error<
++   "'void' must be the first and only parameter if specified">;
++ def err_void_param_qualified : Error<
++   "'void' as parameter must not have type qualifiers">;
++ def err_ident_list_in_fn_declaration : Error<
++   "a parameter list without types is only allowed in a function definition">;
++ def ext_param_not_declared : Extension<
++   "parameter %0 was not declared, defaulting to type 'int'">;
++ def err_param_default_argument : Error<
++   "C does not support default arguments">;
++ def err_param_default_argument_redefinition : Error<
++   "redefinition of default argument">;
++ def ext_param_default_argument_redefinition : ExtWarn<
++   err_param_default_argument_redefinition.Text>,
++   InGroup<MicrosoftDefaultArgRedefinition>;
++ def err_param_default_argument_missing : Error<
++   "missing default argument on parameter">;
++ def err_param_default_argument_missing_name : Error<
++   "missing default argument on parameter %0">;
++ def err_param_default_argument_references_param : Error<
++   "default argument references parameter %0">;
++ def err_param_default_argument_references_local : Error<
++   "default argument references local variable %0 of enclosing function">;
++ def err_param_default_argument_references_this : Error<
++   "default argument references 'this'">;
++ def err_param_default_argument_nonfunc : Error<
++   "default arguments can only be specified for parameters in a function "
++   "declaration">;
++ def err_param_default_argument_template_redecl : Error<
++   "default arguments cannot be added to a function template that has already "
++   "been declared">;
++ def err_param_default_argument_member_template_redecl : Error<
++   "default arguments cannot be added to an out-of-line definition of a member "
++   "of a %select{class template|class template partial specialization|nested "
++   "class in a template}0">;
++ def err_param_default_argument_on_parameter_pack : Error<
++   "parameter pack cannot have a default argument">;
++ def err_uninitialized_member_for_assign : Error<
++   "cannot define the implicit copy assignment operator for %0, because "
++   "non-static %select{reference|const}1 member %2 cannot use copy "
++   "assignment operator">;
++ def err_uninitialized_member_in_ctor : Error<
++   "%select{constructor for %1|"
++   "implicit default constructor for %1|"
++   "cannot use constructor inherited from %1:}0 must explicitly "
++   "initialize the %select{reference|const}2 member %3">;
++ def err_default_arg_makes_ctor_special : Error<
++   "addition of default argument on redeclaration makes this constructor a "
++   "%select{default|copy|move}0 constructor">;
++ 
++ def err_use_of_default_argument_to_function_declared_later : Error<
++   "use of default argument to function %0 that is declared later in class %1">;
++ def note_default_argument_declared_here : Note<
++   "default argument declared here">;
++ def err_recursive_default_argument : Error<"recursive evaluation of default argument">;
++ def note_recursive_default_argument_used_here : Note<
++   "default argument used here">;
++ 
++ def ext_param_promoted_not_compatible_with_prototype : ExtWarn<
++   "%diff{promoted type $ of K&R function parameter is not compatible with the "
++   "parameter type $|promoted type of K&R function parameter is not compatible "
++   "with parameter type}0,1 declared in a previous prototype">,
++   InGroup<KNRPromotedParameter>;
++ 
++ 
++ // C++ Overloading Semantic Analysis.
++ def err_ovl_diff_return_type : Error<
++   "functions that differ only in their return type cannot be overloaded">;
++ def err_ovl_static_nonstatic_member : Error<
++   "static and non-static member functions with the same parameter types "
++   "cannot be overloaded">;
++ 
++ let Deferrable = 1 in {
++ 
++ def err_ovl_no_viable_function_in_call : Error<
++   "no matching function for call to %0">;
++ def err_ovl_no_viable_member_function_in_call : Error<
++   "no matching member function for call to %0">;
++ def err_ovl_ambiguous_call : Error<
++   "call to %0 is ambiguous">;
++ def err_ovl_deleted_call : Error<"call to deleted function %0">;
++ def err_ovl_ambiguous_member_call : Error<
++   "call to member function %0 is ambiguous">;
++ def err_ovl_deleted_member_call : Error<
++   "call to deleted member function %0">;
++ def note_ovl_too_many_candidates : Note<
++     "remaining %0 candidate%s0 omitted; "
++     "pass -fshow-overloads=all to show them">;
++ 
++ def select_ovl_candidate_kind : TextSubstitution<
++   "%select{function|function|function (with reversed parameter order)|"
++     "constructor|"
++     "constructor (the implicit default constructor)|"
++     "constructor (the implicit copy constructor)|"
++     "constructor (the implicit move constructor)|"
++     "function (the implicit copy assignment operator)|"
++     "function (the implicit move assignment operator)|"
++     "function (the implicit 'operator==' for this 'operator<=>)'|"
++     "inherited constructor}0%select{| template| %2}1">;
++ 
++ def note_ovl_candidate : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,3"
++     "%select{| has different class%diff{ (expected $ but has $)|}5,6"
++     "| has different number of parameters (expected %5 but has %6)"
++     "| has type mismatch at %ordinal5 parameter"
++     "%diff{ (expected $ but has $)|}6,7"
++     "| has different return type%diff{ ($ expected but has $)|}5,6"
++     "| has different qualifiers (expected %5 but found %6)"
++     "| has different exception specification}4">;
++ 
++ def note_ovl_candidate_explicit : Note<
++     "explicit %select{constructor|conversion function|deduction guide}0 "
++     "is not a candidate%select{| (explicit specifier evaluates to true)}1">;
++ def note_ovl_candidate_inherited_constructor : Note<
++     "constructor from base class %0 inherited here">;
++ def note_ovl_candidate_inherited_constructor_slice : Note<
++     "candidate %select{constructor|template}0 ignored: "
++     "inherited constructor cannot be used to %select{copy|move}1 object">;
++ def note_ovl_candidate_illegal_constructor : Note<
++     "candidate %select{constructor|template}0 ignored: "
++     "instantiation %select{takes|would take}0 its own class type by value">;
++ def note_ovl_candidate_illegal_constructor_adrspace_mismatch : Note<
++     "candidate constructor ignored: cannot be used to construct an object "
++     "in address space %0">;
++ def note_ovl_candidate_bad_deduction : Note<
++     "candidate template ignored: failed template argument deduction">;
++ def note_ovl_candidate_incomplete_deduction : Note<"candidate template ignored: "
++     "couldn't infer template argument %0">;
++ def note_ovl_candidate_incomplete_deduction_pack : Note<
++     "candidate template ignored: "
++     "deduced too few arguments for expanded pack %0; no argument for %ordinal1 "
++     "expanded parameter in deduced argument pack %2">;
++ def note_ovl_candidate_inconsistent_deduction : Note<
++     "candidate template ignored: deduced %select{conflicting types|"
++     "conflicting values|conflicting templates|packs of different lengths}0 "
++     "for parameter %1%diff{ ($ vs. $)|}2,3">;
++ def note_ovl_candidate_inconsistent_deduction_types : Note<
++     "candidate template ignored: deduced values %diff{"
++     "of conflicting types for parameter %0 (%1 of type $ vs. %3 of type $)|"
++     "%1 and %3 of conflicting types for parameter %0}2,4">;
++ def note_ovl_candidate_explicit_arg_mismatch_named : Note<
++     "candidate template ignored: invalid explicitly-specified argument "
++     "for template parameter %0">;
++ def note_ovl_candidate_unsatisfied_constraints : Note<
++     "candidate template ignored: constraints not satisfied%0">;
++ def note_ovl_candidate_explicit_arg_mismatch_unnamed : Note<
++     "candidate template ignored: invalid explicitly-specified argument "
++     "for %ordinal0 template parameter">;
++ def note_ovl_candidate_instantiation_depth : Note<
++     "candidate template ignored: substitution exceeded maximum template "
++     "instantiation depth">;
++ def note_ovl_candidate_underqualified : Note<
++     "candidate template ignored: cannot deduce a type for %0 that would "
++     "make %2 equal %1">;
++ def note_ovl_candidate_substitution_failure : Note<
++     "candidate template ignored: substitution failure%0%1">;
++ def note_ovl_candidate_disabled_by_enable_if : Note<
++     "candidate template ignored: disabled by %0%1">;
++ def note_ovl_candidate_disabled_by_requirement : Note<
++     "candidate template ignored: requirement '%0' was not satisfied%1">;
++ def note_ovl_candidate_has_pass_object_size_params: Note<
++     "candidate address cannot be taken because parameter %0 has "
++     "pass_object_size attribute">;
++ def err_diagnose_if_succeeded : Error<"%0">;
++ def warn_diagnose_if_succeeded : Warning<"%0">, InGroup<UserDefinedWarnings>,
++     ShowInSystemHeader;
++ def note_ovl_candidate_disabled_by_function_cond_attr : Note<
++     "candidate disabled: %0">;
++ def err_addrof_function_disabled_by_enable_if_attr : Error<
++     "cannot take address of function %0 because it has one or more "
++     "non-tautological enable_if conditions">;
++ def err_addrof_function_constraints_not_satisfied : Error<
++     "cannot take address of function %0 because its constraints are not "
++     "satisfied">;
++ def note_addrof_ovl_candidate_disabled_by_enable_if_attr : Note<
++     "candidate function made ineligible by enable_if">;
++ def note_ovl_candidate_deduced_mismatch : Note<
++     "candidate template ignored: deduced type "
++     "%diff{$ of %select{|element of }4%ordinal0 parameter does not match "
++     "adjusted type $ of %select{|element of }4argument"
++     "|of %select{|element of }4%ordinal0 parameter does not match "
++     "adjusted type of %select{|element of }4argument}1,2%3">;
++ def note_ovl_candidate_non_deduced_mismatch : Note<
++     "candidate template ignored: could not match %diff{$ against $|types}0,1">;
++ // This note is needed because the above note would sometimes print two
++ // different types with the same name.  Remove this note when the above note
++ // can handle that case properly.
++ def note_ovl_candidate_non_deduced_mismatch_qualified : Note<
++     "candidate template ignored: could not match %q0 against %q1">;
++ 
++ // Note that we don't treat templates differently for this diagnostic.
++ def note_ovl_candidate_arity : Note<"candidate "
++     "%sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "requires%select{ at least| at most|}3 %4 argument%s4, but %5 "
++     "%plural{1:was|:were}5 provided">;
++ 
++ def note_ovl_candidate_arity_one : Note<"candidate "
++     "%sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%select{requires at least|allows at most single|requires single}3 "
++     "argument %4, but %plural{0:no|:%5}5 arguments were provided">;
++ 
++ def note_ovl_candidate_deleted : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 has been "
++     "%select{explicitly made unavailable|explicitly deleted|"
++     "implicitly deleted}3">;
++ 
++ // Giving the index of the bad argument really clutters this message, and
++ // it's relatively unimportant because 1) it's generally obvious which
++ // argument(s) are of the given object type and 2) the fix is usually
++ // to complete the type, which doesn't involve changes to the call line
++ // anyway.  If people complain, we can change it.
++ def note_ovl_candidate_bad_conv_incomplete : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "cannot convert argument of incomplete type "
++     "%diff{$ to $|to parameter type}3,4 for "
++     "%select{%ordinal6 argument|object argument}5"
++     "%select{|; dereference the argument with *|"
++     "; take the address of the argument with &|"
++     "; remove *|"
++     "; remove &}7">;
++ def note_ovl_candidate_bad_list_argument : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%select{cannot convert initializer list|too few initializers in list"
++     "|too many initializers in list}7 argument to %4">;
++ def note_ovl_candidate_bad_overload : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "no overload of %4 matching %3 for %ordinal5 argument">;
++ def note_ovl_candidate_bad_conv : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "no known conversion "
++     "%diff{from $ to $|from argument type to parameter type}3,4 for "
++     "%select{%ordinal6 argument|object argument}5"
++     "%select{|; dereference the argument with *|"
++     "; take the address of the argument with &|"
++     "; remove *|"
++     "; remove &}7">;
++ def note_ovl_candidate_bad_arc_conv : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "cannot implicitly convert argument "
++     "%diff{of type $ to $|type to parameter type}3,4 for "
++     "%select{%ordinal6 argument|object argument}5 under ARC">;
++ def note_ovl_candidate_bad_value_category : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "expects an %select{lvalue|rvalue}5 for "
++     "%select{%ordinal4 argument|object argument}3">;
++ def note_ovl_candidate_bad_addrspace : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "cannot %select{pass pointer to|bind reference in}5 %3 "
++     "%select{as a pointer to|to object in}5 %4 in %ordinal6 "
++     "argument">;
++ def note_ovl_candidate_bad_addrspace_this : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "'this' object is in %3, but method expects object in %4">;
++ def note_ovl_candidate_bad_gc : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%select{%ordinal7|'this'}6 argument (%3) has %select{no|__weak|__strong}4 "
++     "ownership, but parameter has %select{no|__weak|__strong}5 ownership">;
++ def note_ovl_candidate_bad_ownership : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%select{%ordinal7|'this'}6 argument (%3) has "
++     "%select{no|__unsafe_unretained|__strong|__weak|__autoreleasing}4 ownership,"
++     " but parameter has %select{no|__unsafe_unretained|__strong|__weak|"
++     "__autoreleasing}5 ownership">;
++ def note_ovl_candidate_bad_cvr_this : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "'this' argument has type %3, but method is not marked "
++     "%select{const|restrict|const or restrict|volatile|const or volatile|"
++     "volatile or restrict|const, volatile, or restrict}4">;
++ def note_ovl_candidate_bad_cvr : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%ordinal5 argument (%3) would lose "
++     "%select{const|restrict|const and restrict|volatile|const and volatile|"
++     "volatile and restrict|const, volatile, and restrict}4 qualifier"
++     "%select{||s||s|s|s}4">;
++ def note_ovl_candidate_bad_unaligned : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "%ordinal5 argument (%3) would lose __unaligned qualifier">;
++ def note_ovl_candidate_bad_base_to_derived_conv : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "cannot %select{convert from|convert from|bind}3 "
++     "%select{base class pointer|superclass|base class object of type}3 %4 to "
++     "%select{derived class pointer|subclass|derived class reference}3 %5 for "
++     "%ordinal6 argument">;
++ def note_ovl_candidate_bad_target : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: "
++     "call to "
++     "%select{__device__|__global__|__host__|__host__ __device__|invalid}3 function from"
++     " %select{__device__|__global__|__host__|__host__ __device__|invalid}4 function">;
++ def note_ovl_candidate_constraints_not_satisfied : Note<
++     "candidate %sub{select_ovl_candidate_kind}0,1,2 not viable: constraints "
++     "not satisfied">;
++ def note_implicit_member_target_infer_collision : Note<
++     "implicit %sub{select_special_member_kind}0 inferred target collision: call to both "
++     "%select{__device__|__global__|__host__|__host__ __device__}1 and "
++     "%select{__device__|__global__|__host__|__host__ __device__}2 members">;
++ 
++ def note_ambiguous_type_conversion: Note<
++     "because of ambiguity in conversion %diff{of $ to $|between types}0,1">;
++ def note_ovl_builtin_candidate : Note<"built-in candidate %0">;
++ def err_ovl_no_viable_function_in_init : Error<
++   "no matching constructor for initialization of %0">;
++ def err_ovl_no_conversion_in_cast : Error<
++   "cannot convert %1 to %2 without a conversion operator">;
++ def err_ovl_no_viable_conversion_in_cast : Error<
++   "no matching conversion for %select{|static_cast|reinterpret_cast|"
++   "dynamic_cast|C-style cast|functional-style cast|}0 from %1 to %2">;
++ def err_ovl_ambiguous_conversion_in_cast : Error<
++   "ambiguous conversion for %select{|static_cast|reinterpret_cast|"
++   "dynamic_cast|C-style cast|functional-style cast|}0 from %1 to %2">;
++ def err_ovl_deleted_conversion_in_cast : Error<
++   "%select{|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|}0 from %1 to %2 uses deleted function">;
++ def err_ovl_ambiguous_init : Error<"call to constructor of %0 is ambiguous">;
++ def err_ref_init_ambiguous : Error<
++   "reference initialization of type %0 with initializer of type %1 is ambiguous">;
++ def err_ovl_deleted_init : Error<
++   "call to deleted constructor of %0">;
++ def err_ovl_deleted_special_init : Error<
++   "call to implicitly-deleted %select{default constructor|copy constructor|"
++   "move constructor|copy assignment operator|move assignment operator|"
++   "destructor|function}0 of %1">;
++ def err_ovl_ambiguous_oper_unary : Error<
++   "use of overloaded operator '%0' is ambiguous (operand type %1)">;
++ def err_ovl_ambiguous_oper_binary : Error<
++   "use of overloaded operator '%0' is ambiguous (with operand types %1 and %2)">;
++ def ext_ovl_ambiguous_oper_binary_reversed : ExtWarn<
++   "ISO C++20 considers use of overloaded operator '%0' (with operand types %1 "
++   "and %2) to be ambiguous despite there being a unique best viable function"
++   "%select{ with non-reversed arguments|}3">,
++   InGroup<DiagGroup<"ambiguous-reversed-operator">>, SFINAEFailure;
++ def note_ovl_ambiguous_oper_binary_reversed_self : Note<
++   "ambiguity is between a regular call to this operator and a call with the "
++   "argument order reversed">;
++ def note_ovl_ambiguous_oper_binary_selected_candidate : Note<
++   "candidate function with non-reversed arguments">;
++ def note_ovl_ambiguous_oper_binary_reversed_candidate : Note<
++   "ambiguous candidate function with reversed arguments">;
++ def err_ovl_no_viable_oper : Error<"no viable overloaded '%0'">;
++ def note_assign_lhs_incomplete : Note<"type %0 is incomplete">;
++ def err_ovl_deleted_oper : Error<
++   "overload resolution selected deleted operator '%0'">;
++ def err_ovl_deleted_special_oper : Error<
++   "object of type %0 cannot be %select{constructed|copied|moved|assigned|"
++   "assigned|destroyed}1 because its %sub{select_special_member_kind}1 is "
++   "implicitly deleted">;
++ def err_ovl_deleted_comparison : Error<
++   "object of type %0 cannot be compared because its %1 is implicitly deleted">;
++ def err_ovl_rewrite_equalequal_not_bool : Error<
++   "return type %0 of selected 'operator==' function for rewritten "
++   "'%1' comparison is not 'bool'">;
++ def ext_ovl_rewrite_equalequal_not_bool : ExtWarn<
++   "ISO C++20 requires return type of selected 'operator==' function for "
++   "rewritten '%1' comparison to be 'bool', not %0">,
++   InGroup<DiagGroup<"rewrite-not-bool">>, SFINAEFailure;
++ def err_ovl_no_viable_subscript :
++     Error<"no viable overloaded operator[] for type %0">;
++ def err_ovl_no_oper :
++     Error<"type %0 does not provide a %select{subscript|call}1 operator">;
++ def err_ovl_unresolvable : Error<
++   "reference to %select{overloaded|multiversioned}1 function could not be "
++   "resolved; did you mean to call it%select{| with no arguments}0?">;
++ def err_bound_member_function : Error<
++   "reference to non-static member function must be called"
++   "%select{|; did you mean to call it with no arguments?}0">;
++ def note_possible_target_of_call : Note<"possible target for call">;
++ 
++ def err_ovl_no_viable_object_call : Error<
++   "no matching function for call to object of type %0">;
++ def err_ovl_ambiguous_object_call : Error<
++   "call to object of type %0 is ambiguous">;
++ def err_ovl_deleted_object_call : Error<
++   "call to deleted function call operator in type %0">;
++ def note_ovl_surrogate_cand : Note<"conversion candidate of type %0">;
++ def err_member_call_without_object : Error<
++   "call to non-static member function without an object argument">;
++ 
++ // C++ Address of Overloaded Function
++ def err_addr_ovl_no_viable : Error<
++   "address of overloaded function %0 does not match required type %1">;
++ def err_addr_ovl_ambiguous : Error<
++   "address of overloaded function %0 is ambiguous">;
++ def err_addr_ovl_not_func_ptrref : Error<
++   "address of overloaded function %0 cannot be converted to type %1">;
++ def err_addr_ovl_no_qualifier : Error<
++   "cannot form member pointer of type %0 without '&' and class name">;
++ 
++ } // let Deferrable
++ 
++ // C++11 Literal Operators
++ def err_ovl_no_viable_literal_operator : Error<
++   "no matching literal operator for call to %0"
++   "%select{| with argument of type %2| with arguments of types %2 and %3}1"
++   "%select{| or 'const char *'}4"
++   "%select{|, and no matching literal operator template}5">;
++ 
++ // C++ Template Declarations
++ def err_template_param_shadow : Error<
++   "declaration of %0 shadows template parameter">;
++ def ext_template_param_shadow : ExtWarn<
++   err_template_param_shadow.Text>, InGroup<MicrosoftTemplateShadow>;
++ def note_template_param_here : Note<"template parameter is declared here">;
++ def warn_template_export_unsupported : Warning<
++   "exported templates are unsupported">;
++ def err_template_outside_namespace_or_class_scope : Error<
++   "templates can only be declared in namespace or class scope">;
++ def err_template_inside_local_class : Error<
++   "templates cannot be declared inside of a local class">;
++ def err_template_linkage : Error<"templates must have C++ linkage">;
++ def err_template_typedef : Error<"a typedef cannot be a template">;
++ def err_template_unnamed_class : Error<
++   "cannot declare a class template with no name">;
++ def err_template_param_list_different_arity : Error<
++   "%select{too few|too many}0 template parameters in template "
++   "%select{|template parameter }1redeclaration">;
++ def note_template_param_list_different_arity : Note<
++   "%select{too few|too many}0 template parameters in template template "
++   "argument">;
++ def note_template_prev_declaration : Note<
++   "previous template %select{declaration|template parameter}0 is here">;
++ def err_template_param_different_kind : Error<
++   "template parameter has a different kind in template "
++   "%select{|template parameter }0redeclaration">;
++ def note_template_param_different_kind : Note<
++   "template parameter has a different kind in template argument">;
++ 
++ def err_invalid_decl_specifier_in_nontype_parm : Error<
++   "invalid declaration specifier in template non-type parameter">;
++ 
++ def err_template_nontype_parm_different_type : Error<
++   "template non-type parameter has a different type %0 in template "
++   "%select{|template parameter }1redeclaration">;
++ 
++ def note_template_nontype_parm_different_type : Note<
++   "template non-type parameter has a different type %0 in template argument">;
++ def note_template_nontype_parm_prev_declaration : Note<
++   "previous non-type template parameter with type %0 is here">;
++ def err_template_nontype_parm_bad_type : Error<
++   "a non-type template parameter cannot have type %0">;
++ def err_template_nontype_parm_bad_structural_type : Error<
++   "a non-type template parameter cannot have type %0 before C++20">;
++ def err_template_nontype_parm_incomplete : Error<
++   "non-type template parameter has incomplete type %0">;
++ def err_template_nontype_parm_not_literal : Error<
++   "non-type template parameter has non-literal type %0">;
++ def err_template_nontype_parm_rvalue_ref : Error<
++   "non-type template parameter has rvalue reference type %0">;
++ def err_template_nontype_parm_not_structural : Error<
++   "type %0 of non-type template parameter is not a structural type">;
++ def note_not_structural_non_public : Note<
++   "%0 is not a structural type because it has a "
++   "%select{non-static data member|base class}1 that is not public">;
++ def note_not_structural_mutable_field : Note<
++   "%0 is not a structural type because it has a mutable "
++   "non-static data member">;
++ def note_not_structural_rvalue_ref_field : Note<
++   "%0 is not a structural type because it has a non-static data member "
++   "of rvalue reference type">;
++ def note_not_structural_subobject : Note<
++   "%0 is not a structural type because it has a "
++   "%select{non-static data member|base class}1 of non-structural type %2">;
++ def warn_cxx17_compat_template_nontype_parm_type : Warning<
++   "non-type template parameter of type %0 is incompatible with "
++   "C++ standards before C++20">,
++   DefaultIgnore, InGroup<CXXPre20Compat>;
++ def warn_cxx14_compat_template_nontype_parm_auto_type : Warning<
++   "non-type template parameters declared with %0 are incompatible with C++ "
++   "standards before C++17">,
++   DefaultIgnore, InGroup<CXXPre17Compat>;
++ def err_template_param_default_arg_redefinition : Error<
++   "template parameter redefines default argument">;
++ def note_template_param_prev_default_arg : Note<
++   "previous default template argument defined here">;
++ def err_template_param_default_arg_missing : Error<
++   "template parameter missing a default argument">;
++ def ext_template_parameter_default_in_function_template : ExtWarn<
++   "default template arguments for a function template are a C++11 extension">,
++   InGroup<CXX11>;
++ def warn_cxx98_compat_template_parameter_default_in_function_template : Warning<
++   "default template arguments for a function template are incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_template_parameter_default_template_member : Error<
++   "cannot add a default template argument to the definition of a member of a "
++   "class template">;
++ def err_template_parameter_default_friend_template : Error<
++   "default template argument not permitted on a friend template">;
++ def err_template_template_parm_no_parms : Error<
++   "template template parameter must have its own template parameters">;
++ 
++ def ext_variable_template : ExtWarn<"variable templates are a C++14 extension">,
++   InGroup<CXX14>;
++ def warn_cxx11_compat_variable_template : Warning<
++   "variable templates are incompatible with C++ standards before C++14">,
++   InGroup<CXXPre14Compat>, DefaultIgnore;
++ def err_template_variable_noparams : Error<
++   "extraneous 'template<>' in declaration of variable %0">;
++ def err_template_member : Error<"member %0 declared as a template">;
++ def err_template_member_noparams : Error<
++   "extraneous 'template<>' in declaration of member %0">;
++ def err_template_tag_noparams : Error<
++   "extraneous 'template<>' in declaration of %0 %1">;
++ 
++ def warn_cxx17_compat_adl_only_template_id : Warning<
++   "use of function template name with no prior function template "
++   "declaration in function call with explicit template arguments "
++   "is incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20Compat>, DefaultIgnore;
++ def ext_adl_only_template_id : ExtWarn<
++   "use of function template name with no prior declaration in function call "
++   "with explicit template arguments is a C++20 extension">, InGroup<CXX20>;
++ 
++ // C++ Template Argument Lists
++ def err_template_missing_args : Error<
++   "use of "
++   "%select{class template|function template|variable template|alias template|"
++   "template template parameter|concept|template}0 %1 requires template "
++   "arguments">;
++ def err_template_arg_list_different_arity : Error<
++   "%select{too few|too many}0 template arguments for "
++   "%select{class template|function template|variable template|alias template|"
++   "template template parameter|concept|template}1 %2">;
++ def note_template_decl_here : Note<"template is declared here">;
++ def err_template_arg_must_be_type : Error<
++   "template argument for template type parameter must be a type">;
++ def err_template_arg_must_be_type_suggest : Error<
++   "template argument for template type parameter must be a type; "
++   "did you forget 'typename'?">;
++ def ext_ms_template_type_arg_missing_typename : ExtWarn<
++   "template argument for template type parameter must be a type; "
++   "omitted 'typename' is a Microsoft extension">,
++   InGroup<MicrosoftTemplate>;
++ def err_template_arg_must_be_expr : Error<
++   "template argument for non-type template parameter must be an expression">;
++ def err_template_arg_nontype_ambig : Error<
++   "template argument for non-type template parameter is treated as function type %0">;
++ def err_template_arg_must_be_template : Error<
++   "template argument for template template parameter must be a class template%select{| or type alias template}0">;
++ def ext_template_arg_local_type : ExtWarn<
++   "template argument uses local type %0">, InGroup<LocalTypeTemplateArgs>;
++ def ext_template_arg_unnamed_type : ExtWarn<
++   "template argument uses unnamed type">, InGroup<UnnamedTypeTemplateArgs>;
++ def warn_cxx98_compat_template_arg_local_type : Warning<
++   "local type %0 as template argument is incompatible with C++98">,
++   InGroup<CXX98CompatLocalTypeTemplateArgs>, DefaultIgnore;
++ def warn_cxx98_compat_template_arg_unnamed_type : Warning<
++   "unnamed type as template argument is incompatible with C++98">,
++   InGroup<CXX98CompatUnnamedTypeTemplateArgs>, DefaultIgnore;
++ def note_template_unnamed_type_here : Note<
++   "unnamed type used in template argument was declared here">;
++ def err_template_arg_overload_type : Error<
++   "template argument is the type of an unresolved overloaded function">;
++ def err_template_arg_not_valid_template : Error<
++   "template argument does not refer to a class or alias template, or template "
++   "template parameter">;
++ def note_template_arg_refers_here_func : Note<
++   "template argument refers to function template %0, here">;
++ def err_template_arg_template_params_mismatch : Error<
++   "template template argument has different template parameters than its "
++   "corresponding template template parameter">;
++ def err_template_arg_not_integral_or_enumeral : Error<
++   "non-type template argument of type %0 must have an integral or enumeration"
++   " type">;
++ def err_template_arg_not_ice : Error<
++   "non-type template argument of type %0 is not an integral constant "
++   "expression">;
++ def err_template_arg_not_address_constant : Error<
++   "non-type template argument of type %0 is not a constant expression">;
++ def warn_cxx98_compat_template_arg_null : Warning<
++   "use of null pointer as non-type template argument is incompatible with "
++   "C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def err_template_arg_untyped_null_constant : Error<
++   "null non-type template argument must be cast to template parameter type %0">;
++ def err_template_arg_wrongtype_null_constant : Error<
++   "null non-type template argument of type %0 does not match template parameter "
++   "of type %1">;
++ def err_non_type_template_parm_type_deduction_failure : Error<
++   "non-type template parameter %0 with type %1 has incompatible initializer of type %2">;
++ def err_deduced_non_type_template_arg_type_mismatch : Error<
++   "deduced non-type template argument does not have the same type as the "
++   "corresponding template parameter%diff{ ($ vs $)|}0,1">;
++ def err_non_type_template_arg_subobject : Error<
++   "non-type template argument refers to subobject '%0'">;
++ def err_non_type_template_arg_addr_label_diff : Error<
++   "template argument / label address difference / what did you expect?">;
++ def err_non_type_template_arg_unsupported : Error<
++   "sorry, non-type template argument of type %0 is not yet supported">;
++ def err_template_arg_not_convertible : Error<
++   "non-type template argument of type %0 cannot be converted to a value "
++   "of type %1">;
++ def warn_template_arg_negative : Warning<
++   "non-type template argument with value '%0' converted to '%1' for unsigned "
++   "template parameter of type %2">, InGroup<Conversion>, DefaultIgnore;
++ def warn_template_arg_too_large : Warning<
++   "non-type template argument value '%0' truncated to '%1' for "
++   "template parameter of type %2">, InGroup<Conversion>, DefaultIgnore;
++ def err_template_arg_no_ref_bind : Error<
++   "non-type template parameter of reference type "
++   "%diff{$ cannot bind to template argument of type $"
++   "|cannot bind to template of incompatible argument type}0,1">;
++ def err_template_arg_ref_bind_ignores_quals : Error<
++   "reference binding of non-type template parameter "
++   "%diff{of type $ to template argument of type $|to template argument}0,1 "
++   "ignores qualifiers">;
++ def err_template_arg_not_decl_ref : Error<
++   "non-type template argument does not refer to any declaration">;
++ def err_template_arg_not_address_of : Error<
++   "non-type template argument for template parameter of pointer type %0 must "
++   "have its address taken">;
++ def err_template_arg_address_of_non_pointer : Error<
++   "address taken in non-type template argument for template parameter of "
++   "reference type %0">;
++ def err_template_arg_reference_var : Error<
++   "non-type template argument of reference type %0 is not an object">;
++ def err_template_arg_field : Error<
++   "non-type template argument refers to non-static data member %0">;
++ def err_template_arg_method : Error<
++   "non-type template argument refers to non-static member function %0">;
++ def err_template_arg_object_no_linkage : Error<
++   "non-type template argument refers to %select{function|object}0 %1 that "
++   "does not have linkage">;
++ def warn_cxx98_compat_template_arg_object_internal : Warning<
++   "non-type template argument referring to %select{function|object}0 %1 with "
++   "internal linkage is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def ext_template_arg_object_internal : ExtWarn<
++   "non-type template argument referring to %select{function|object}0 %1 with "
++   "internal linkage is a C++11 extension">, InGroup<CXX11>;
++ def err_template_arg_thread_local : Error<
++   "non-type template argument refers to thread-local object">;
++ def note_template_arg_internal_object : Note<
++   "non-type template argument refers to %select{function|object}0 here">;
++ def note_template_arg_refers_here : Note<
++   "non-type template argument refers here">;
++ def err_template_arg_not_object_or_func : Error<
++   "non-type template argument does not refer to an object or function">;
++ def err_template_arg_not_pointer_to_member_form : Error<
++   "non-type template argument is not a pointer to member constant">;
++ def err_template_arg_member_ptr_base_derived_not_supported : Error<
++   "sorry, non-type template argument of pointer-to-member type %1 that refers "
++   "to member %q0 of a different class is not supported yet">;
++ def ext_template_arg_extra_parens : ExtWarn<
++   "address non-type template argument cannot be surrounded by parentheses">;
++ def warn_cxx98_compat_template_arg_extra_parens : Warning<
++   "redundant parentheses surrounding address non-type template argument are "
++   "incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def err_pointer_to_member_type : Error<
++   "invalid use of pointer to member type after %select{.*|->*}0">;
++ def err_pointer_to_member_call_drops_quals : Error<
++   "call to pointer to member function of type %0 drops '%1' qualifier%s2">;
++ def err_pointer_to_member_oper_value_classify: Error<
++   "pointer-to-member function type %0 can only be called on an "
++   "%select{rvalue|lvalue}1">;
++ def ext_pointer_to_const_ref_member_on_rvalue : Extension<
++   "invoking a pointer to a 'const &' member function on an rvalue is a C++20 extension">,
++   InGroup<CXX20>, SFINAEFailure;
++ def warn_cxx17_compat_pointer_to_const_ref_member_on_rvalue : Warning<
++   "invoking a pointer to a 'const &' member function on an rvalue is "
++   "incompatible with C++ standards before C++20">,
++   InGroup<CXXPre20CompatPedantic>, DefaultIgnore;
++ def ext_ms_deref_template_argument: ExtWarn<
++   "non-type template argument containing a dereference operation is a "
++   "Microsoft extension">, InGroup<MicrosoftTemplate>;
++ def ext_ms_delayed_template_argument: ExtWarn<
++   "using the undeclared type %0 as a default template argument is a "
++   "Microsoft extension">, InGroup<MicrosoftTemplate>;
++ def err_template_arg_deduced_incomplete_pack : Error<
++   "deduced incomplete pack %0 for template parameter %1">;
++ 
++ // C++ template specialization
++ def err_template_spec_unknown_kind : Error<
++   "can only provide an explicit specialization for a class template, function "
++   "template, variable template, or a member function, static data member, "
++   "%select{or member class|member class, or member enumeration}0 of a "
++   "class template">;
++ def note_specialized_entity : Note<
++   "explicitly specialized declaration is here">;
++ def note_explicit_specialization_declared_here : Note<
++   "explicit specialization declared here">;
++ def err_template_spec_decl_function_scope : Error<
++   "explicit specialization of %0 in function scope">;
++ def err_template_spec_decl_friend : Error<
++   "cannot declare an explicit specialization in a friend">;
++ def err_template_spec_redecl_out_of_scope : Error<
++   "%select{class template|class template partial|variable template|"
++   "variable template partial|function template|member "
++   "function|static data member|member class|member enumeration}0 "
++   "specialization of %1 not in %select{a namespace enclosing %2|"
++   "class %2 or an enclosing namespace}3">;
++ def ext_ms_template_spec_redecl_out_of_scope: ExtWarn<
++   "%select{class template|class template partial|variable template|"
++   "variable template partial|function template|member "
++   "function|static data member|member class|member enumeration}0 "
++   "specialization of %1 not in %select{a namespace enclosing %2|"
++   "class %2 or an enclosing namespace}3 "
++   "is a Microsoft extension">, InGroup<MicrosoftTemplate>;
++ def err_template_spec_redecl_global_scope : Error<
++   "%select{class template|class template partial|variable template|"
++   "variable template partial|function template|member "
++   "function|static data member|member class|member enumeration}0 "
++   "specialization of %1 must occur at global scope">;
++ def err_spec_member_not_instantiated : Error<
++   "specialization of member %q0 does not specialize an instantiated member">;
++ def note_specialized_decl : Note<"attempt to specialize declaration here">;
++ def err_specialization_after_instantiation : Error<
++   "explicit specialization of %0 after instantiation">;
++ def note_instantiation_required_here : Note<
++   "%select{implicit|explicit}0 instantiation first required here">;
++ def err_template_spec_friend : Error<
++   "template specialization declaration cannot be a friend">;
++ def err_template_spec_default_arg : Error<
++   "default argument not permitted on an explicit "
++   "%select{instantiation|specialization}0 of function %1">;
++ def err_not_class_template_specialization : Error<
++   "cannot specialize a %select{dependent template|template template "
++   "parameter}0">;
++ def ext_explicit_specialization_storage_class : ExtWarn<
++   "explicit specialization cannot have a storage class">;
++ def err_explicit_specialization_inconsistent_storage_class : Error<
++   "explicit specialization has extraneous, inconsistent storage class "
++   "'%select{none|extern|static|__private_extern__|auto|register}0'">;
++ def err_dependent_function_template_spec_no_match : Error<
++   "no candidate function template was found for dependent"
++   " friend function template specialization">;
++ def note_dependent_function_template_spec_discard_reason : Note<
++   "candidate ignored: %select{not a function template"
++   "|not a member of the enclosing namespace;"
++   " did you mean to explicitly qualify the specialization?}0">;
++ 
++ // C++ class template specializations and out-of-line definitions
++ def err_template_spec_needs_header : Error<
++   "template specialization requires 'template<>'">;
++ def err_template_spec_needs_template_parameters : Error<
++   "template specialization or definition requires a template parameter list "
++   "corresponding to the nested type %0">;
++ def err_template_param_list_matches_nontemplate : Error<
++   "template parameter list matching the non-templated nested type %0 should "
++   "be empty ('template<>')">;
++ def err_alias_template_extra_headers : Error<
++   "extraneous template parameter list in alias template declaration">;
++ def err_template_spec_extra_headers : Error<
++   "extraneous template parameter list in template specialization or "
++   "out-of-line template definition">;
++ def warn_template_spec_extra_headers : Warning<
++   "extraneous template parameter list in template specialization">;
++ def note_explicit_template_spec_does_not_need_header : Note<
++   "'template<>' header not required for explicitly-specialized class %0 "
++   "declared here">;
++ def err_template_qualified_declarator_no_match : Error<
++   "nested name specifier '%0' for declaration does not refer into a class, "
++   "class template or class template partial specialization">;
++ def err_specialize_member_of_template : Error<
++   "cannot specialize %select{|(with 'template<>') }0a member of an "
++   "unspecialized template">;
++ 
++ // C++ Class Template Partial Specialization
++ def err_default_arg_in_partial_spec : Error<
++     "default template argument in a class template partial specialization">;
++ def err_dependent_non_type_arg_in_partial_spec : Error<
++     "type of specialized non-type template argument depends on a template "
++     "parameter of the partial specialization">;
++ def note_dependent_non_type_default_arg_in_partial_spec : Note<
++     "template parameter is used in default argument declared here">;
++ def err_dependent_typed_non_type_arg_in_partial_spec : Error<
++     "non-type template argument specializes a template parameter with "
++     "dependent type %0">;
++ def err_partial_spec_args_match_primary_template : Error<
++     "%select{class|variable}0 template partial specialization does not "
++     "specialize any template argument; to %select{declare|define}1 the "
++     "primary template, remove the template argument list">;
++ def ext_partial_spec_not_more_specialized_than_primary : ExtWarn<
++     "%select{class|variable}0 template partial specialization is not "
++     "more specialized than the primary template">, DefaultError,
++     InGroup<DiagGroup<"invalid-partial-specialization">>;
++ def note_partial_spec_not_more_specialized_than_primary : Note<"%0">;
++ def ext_partial_specs_not_deducible : ExtWarn<
++     "%select{class|variable}0 template partial specialization contains "
++     "%select{a template parameter|template parameters}1 that cannot be "
++     "deduced; this partial specialization will never be used">,
++     DefaultError, InGroup<DiagGroup<"unusable-partial-specialization">>;
++ def note_non_deducible_parameter : Note<
++     "non-deducible template parameter %0">;
++ def err_partial_spec_ordering_ambiguous : Error<
++     "ambiguous partial specializations of %0">;
++ def note_partial_spec_match : Note<"partial specialization matches %0">;
++ def err_partial_spec_redeclared : Error<
++   "class template partial specialization %0 cannot be redeclared">;
++ def note_partial_specialization_declared_here : Note<
++   "explicit specialization declared here">;
++ def note_prev_partial_spec_here : Note<
++   "previous declaration of class template partial specialization %0 is here">;
++ def err_partial_spec_fully_specialized : Error<
++   "partial specialization of %0 does not use any of its template parameters">;
++ 
++ // C++ Variable Template Partial Specialization
++ def err_var_partial_spec_redeclared : Error<
++   "variable template partial specialization %0 cannot be redefined">;
++ def note_var_prev_partial_spec_here : Note<
++   "previous declaration of variable template partial specialization is here">;
++ def err_var_spec_no_template : Error<
++   "no variable template matches%select{| partial}0 specialization">;
++ def err_var_spec_no_template_but_method : Error<
++   "no variable template matches specialization; "
++   "did you mean to use %0 as function template instead?">;
++ 
++ // C++ Function template specializations
++ def err_function_template_spec_no_match : Error<
++     "no function template matches function template specialization %0">;
++ def err_function_template_spec_ambiguous : Error<
++     "function template specialization %0 ambiguously refers to more than one "
++     "function template; explicitly specify%select{| additional}1 template "
++     "arguments to identify a particular function template">;
++ def note_function_template_spec_matched : Note<
++     "function template %q0 matches specialization %1">;
++ def err_function_template_partial_spec : Error<
++     "function template partial specialization is not allowed">;
++ 
++ // C++ Template Instantiation
++ def err_template_recursion_depth_exceeded : Error<
++   "recursive template instantiation exceeded maximum depth of %0">,
++   DefaultFatal, NoSFINAE;
++ def note_template_recursion_depth : Note<
++   "use -ftemplate-depth=N to increase recursive template instantiation depth">;
++ 
++ def err_template_instantiate_within_definition : Error<
++   "%select{implicit|explicit}0 instantiation of template %1 within its"
++   " own definition">;
++ def err_template_instantiate_undefined : Error<
++   "%select{implicit|explicit}0 instantiation of undefined template %1">;
++ def err_implicit_instantiate_member_undefined : Error<
++   "implicit instantiation of undefined member %0">;
++ def note_template_class_instantiation_was_here : Note<
++   "class template %0 was instantiated here">;
++ def note_template_class_explicit_specialization_was_here : Note<
++   "class template %0 was explicitly specialized here">;
++ def note_template_class_instantiation_here : Note<
++   "in instantiation of template class %q0 requested here">;
++ def note_template_member_class_here : Note<
++   "in instantiation of member class %q0 requested here">;
++ def note_template_member_function_here : Note<
++   "in instantiation of member function %q0 requested here">;
++ def note_function_template_spec_here : Note<
++   "in instantiation of function template specialization %q0 requested here">;
++ def note_template_static_data_member_def_here : Note<
++   "in instantiation of static data member %q0 requested here">;
++ def note_template_variable_def_here : Note<
++   "in instantiation of variable template specialization %q0 requested here">;
++ def note_template_enum_def_here : Note<
++   "in instantiation of enumeration %q0 requested here">;
++ def note_template_nsdmi_here : Note<
++   "in instantiation of default member initializer %q0 requested here">;
++ def note_template_type_alias_instantiation_here : Note<
++   "in instantiation of template type alias %0 requested here">;
++ def note_template_exception_spec_instantiation_here : Note<
++   "in instantiation of exception specification for %0 requested here">;
++ def note_template_requirement_instantiation_here : Note<
++   "in instantiation of requirement here">;
++ def warn_var_template_missing : Warning<"instantiation of variable %q0 "
++   "required here, but no definition is available">,
++   InGroup<UndefinedVarTemplate>;
++ def warn_func_template_missing : Warning<"instantiation of function %q0 "
++   "required here, but no definition is available">,
++   InGroup<UndefinedFuncTemplate>, DefaultIgnore;
++ def note_forward_template_decl : Note<
++   "forward declaration of template entity is here">;
++ def note_inst_declaration_hint : Note<"add an explicit instantiation "
++   "declaration to suppress this warning if %q0 is explicitly instantiated in "
++   "another translation unit">;
++ def note_evaluating_exception_spec_here : Note<
++   "in evaluation of exception specification for %q0 needed here">;
++ 
++ def note_default_arg_instantiation_here : Note<
++   "in instantiation of default argument for '%0' required here">;
++ def note_default_function_arg_instantiation_here : Note<
++   "in instantiation of default function argument expression "
++   "for '%0' required here">;
++ def note_explicit_template_arg_substitution_here : Note<
++   "while substituting explicitly-specified template arguments into function "
++   "template %0 %1">;
++ def note_function_template_deduction_instantiation_here : Note<
++   "while substituting deduced template arguments into function template %0 "
++   "%1">;
++ def note_deduced_template_arg_substitution_here : Note<
++   "during template argument deduction for %select{class|variable}0 template "
++   "%select{partial specialization |}1%2 %3">;
++ def note_prior_template_arg_substitution : Note<
++   "while substituting prior template arguments into %select{non-type|template}0"
++   " template parameter%1 %2">;
++ def note_template_default_arg_checking : Note<
++   "while checking a default template argument used here">;
++ def note_concept_specialization_here : Note<
++   "while checking the satisfaction of concept '%0' requested here">;
++ def note_nested_requirement_here : Note<
++   "while checking the satisfaction of nested requirement requested here">;
++ def note_checking_constraints_for_template_id_here : Note<
++   "while checking constraint satisfaction for template '%0' required here">;
++ def note_checking_constraints_for_var_spec_id_here : Note<
++   "while checking constraint satisfaction for variable template "
++   "partial specialization '%0' required here">;
++ def note_checking_constraints_for_class_spec_id_here : Note<
++   "while checking constraint satisfaction for class template partial "
++   "specialization '%0' required here">;
++ def note_checking_constraints_for_function_here : Note<
++   "while checking constraint satisfaction for function '%0' required here">;
++ def note_constraint_substitution_here : Note<
++   "while substituting template arguments into constraint expression here">;
++ def note_constraint_normalization_here : Note<
++   "while calculating associated constraint of template '%0' here">;
++ def note_parameter_mapping_substitution_here : Note<
++   "while substituting into concept arguments here; substitution failures not "
++   "allowed in concept arguments">;
++ def note_instantiation_contexts_suppressed : Note<
++   "(skipping %0 context%s0 in backtrace; use -ftemplate-backtrace-limit=0 to "
++   "see all)">;
++ 
++ def err_field_instantiates_to_function : Error<
++   "data member instantiated with function type %0">;
++ def err_variable_instantiates_to_function : Error<
++   "%select{variable|static data member}0 instantiated with function type %1">;
++ def err_nested_name_spec_non_tag : Error<
++   "type %0 cannot be used prior to '::' because it has no members">;
++ 
++ def err_using_pack_expansion_empty : Error<
++   "%select{|member}0 using declaration %1 instantiates to an empty pack">;
++ 
++ // C++ Explicit Instantiation
++ def err_explicit_instantiation_duplicate : Error<
++     "duplicate explicit instantiation of %0">;
++ def ext_explicit_instantiation_duplicate : ExtWarn<
++     "duplicate explicit instantiation of %0 ignored as a Microsoft extension">,
++     InGroup<MicrosoftTemplate>;
++ def note_previous_explicit_instantiation : Note<
++     "previous explicit instantiation is here">;
++ def warn_explicit_instantiation_after_specialization : Warning<
++   "explicit instantiation of %0 that occurs after an explicit "
++   "specialization has no effect">,
++   InGroup<DiagGroup<"instantiation-after-specialization">>;
++ def note_previous_template_specialization : Note<
++     "previous template specialization is here">;
++ def err_explicit_instantiation_nontemplate_type : Error<
++     "explicit instantiation of non-templated type %0">;
++ def note_nontemplate_decl_here : Note<
++     "non-templated declaration is here">;
++ def err_explicit_instantiation_in_class : Error<
++   "explicit instantiation of %0 in class scope">;
++ def err_explicit_instantiation_out_of_scope : Error<
++   "explicit instantiation of %0 not in a namespace enclosing %1">;
++ def err_explicit_instantiation_must_be_global : Error<
++   "explicit instantiation of %0 must occur at global scope">;
++ def warn_explicit_instantiation_out_of_scope_0x : Warning<
++   "explicit instantiation of %0 not in a namespace enclosing %1">,
++   InGroup<CXX11Compat>, DefaultIgnore;
++ def warn_explicit_instantiation_must_be_global_0x : Warning<
++   "explicit instantiation of %0 must occur at global scope">,
++   InGroup<CXX11Compat>, DefaultIgnore;
++ 
++ def err_explicit_instantiation_requires_name : Error<
++   "explicit instantiation declaration requires a name">;
++ def err_explicit_instantiation_of_typedef : Error<
++   "explicit instantiation of typedef %0">;
++ def err_explicit_instantiation_storage_class : Error<
++   "explicit instantiation cannot have a storage class">;
++ def err_explicit_instantiation_internal_linkage : Error<
++   "explicit instantiation declaration of %0 with internal linkage">;
++ def err_explicit_instantiation_not_known : Error<
++   "explicit instantiation of %0 does not refer to a function template, "
++   "variable template, member function, member class, or static data member">;
++ def note_explicit_instantiation_here : Note<
++   "explicit instantiation refers here">;
++ def err_explicit_instantiation_data_member_not_instantiated : Error<
++   "explicit instantiation refers to static data member %q0 that is not an "
++   "instantiation">;
++ def err_explicit_instantiation_member_function_not_instantiated : Error<
++   "explicit instantiation refers to member function %q0 that is not an "
++   "instantiation">;
++ def err_explicit_instantiation_ambiguous : Error<
++   "partial ordering for explicit instantiation of %0 is ambiguous">;
++ def note_explicit_instantiation_candidate : Note<
++   "explicit instantiation candidate function %q0 template here %1">;
++ def err_explicit_instantiation_inline : Error<
++   "explicit instantiation cannot be 'inline'">;
++ def warn_explicit_instantiation_inline_0x : Warning<
++   "explicit instantiation cannot be 'inline'">, InGroup<CXX11Compat>,
++   DefaultIgnore;
++ def err_explicit_instantiation_constexpr : Error<
++   "explicit instantiation cannot be 'constexpr'">;
++ def ext_explicit_instantiation_without_qualified_id : Extension<
++   "qualifier in explicit instantiation of %q0 requires a template-id "
++   "(a typedef is not permitted)">;
++ def err_explicit_instantiation_without_template_id : Error<
++   "explicit instantiation of %q0 must specify a template argument list">;
++ def err_explicit_instantiation_unqualified_wrong_namespace : Error<
++   "explicit instantiation of %q0 must occur in namespace %1">;
++ def warn_explicit_instantiation_unqualified_wrong_namespace_0x : Warning<
++   "explicit instantiation of %q0 must occur in namespace %1">,
++   InGroup<CXX11Compat>, DefaultIgnore;
++ def err_explicit_instantiation_undefined_member : Error<
++   "explicit instantiation of undefined %select{member class|member function|"
++   "static data member}0 %1 of class template %2">;
++ def err_explicit_instantiation_undefined_func_template : Error<
++   "explicit instantiation of undefined function template %0">;
++ def err_explicit_instantiation_undefined_var_template : Error<
++   "explicit instantiation of undefined variable template %q0">;
++ def err_explicit_instantiation_declaration_after_definition : Error<
++   "explicit instantiation declaration (with 'extern') follows explicit "
++   "instantiation definition (without 'extern')">;
++ def note_explicit_instantiation_definition_here : Note<
++   "explicit instantiation definition is here">;
++ def err_invalid_var_template_spec_type : Error<"type %2 "
++   "of %select{explicit instantiation|explicit specialization|"
++   "partial specialization|redeclaration}0 of %1 does not match"
++   " expected type %3">;
++ def err_mismatched_exception_spec_explicit_instantiation : Error<
++   "exception specification in explicit instantiation does not match "
++   "instantiated one">;
++ def ext_mismatched_exception_spec_explicit_instantiation : ExtWarn<
++   err_mismatched_exception_spec_explicit_instantiation.Text>,
++   InGroup<MicrosoftExceptionSpec>;
++ def err_explicit_instantiation_dependent : Error<
++   "explicit instantiation has dependent template arguments">;
++ 
++ // C++ typename-specifiers
++ def err_typename_nested_not_found : Error<"no type named %0 in %1">;
++ def err_typename_nested_not_found_enable_if : Error<
++   "no type named 'type' in %0; 'enable_if' cannot be used to disable "
++   "this declaration">;
++ def err_typename_nested_not_found_requirement : Error<
++   "failed requirement '%0'; 'enable_if' cannot be used to disable this "
++   "declaration">;
++ def err_typename_nested_not_type : Error<
++     "typename specifier refers to non-type member %0 in %1">;
++ def err_typename_not_type : Error<
++     "typename specifier refers to non-type %0">;
++ def note_typename_member_refers_here : Note<
++     "referenced member %0 is declared here">;
++ def note_typename_refers_here : Note<
++     "referenced %0 is declared here">;
++ def err_typename_missing : Error<
++   "missing 'typename' prior to dependent type name '%0%1'">;
++ def err_typename_missing_template : Error<
++   "missing 'typename' prior to dependent type template name '%0%1'">;
++ def ext_typename_missing : ExtWarn<
++   "missing 'typename' prior to dependent type name '%0%1'">,
++   InGroup<DiagGroup<"typename-missing">>;
++ def ext_typename_outside_of_template : ExtWarn<
++   "'typename' occurs outside of a template">, InGroup<CXX11>;
++ def warn_cxx98_compat_typename_outside_of_template : Warning<
++   "use of 'typename' outside of a template is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_typename_refers_to_using_value_decl : Error<
++   "typename specifier refers to a dependent using declaration for a value "
++   "%0 in %1">;
++ def note_using_value_decl_missing_typename : Note<
++   "add 'typename' to treat this using declaration as a type">;
++ 
++ def err_template_kw_refers_to_non_template : Error<
++   "%0%select{| following the 'template' keyword}1 "
++   "does not refer to a template">;
++ def note_template_kw_refers_to_non_template : Note<
++   "declared as a non-template here">;
++ def err_template_kw_refers_to_dependent_non_template : Error<
++   "%0%select{| following the 'template' keyword}1 "
++   "cannot refer to a dependent template">;
++ def err_template_kw_refers_to_class_template : Error<
++   "'%0%1' instantiated to a class template, not a function template">;
++ def note_referenced_class_template : Note<
++   "class template declared here">;
++ def err_template_kw_missing : Error<
++   "missing 'template' keyword prior to dependent template name '%0%1'">;
++ def ext_template_outside_of_template : ExtWarn<
++   "'template' keyword outside of a template">, InGroup<CXX11>;
++ def warn_cxx98_compat_template_outside_of_template : Warning<
++   "use of 'template' keyword outside of a template is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ 
++ def err_non_type_template_in_nested_name_specifier : Error<
++   "qualified name refers into a specialization of %select{function|variable}0 "
++   "template %1">;
++ def err_template_id_not_a_type : Error<
++   "template name refers to non-type template %0">;
++ def note_template_declared_here : Note<
++   "%select{function template|class template|variable template"
++   "|type alias template|template template parameter}0 "
++   "%1 declared here">;
++ def err_template_expansion_into_fixed_list : Error<
++   "pack expansion used as argument for non-pack parameter of %select{alias "
++   "template|concept}0">;
++ def note_parameter_type : Note<
++   "parameter of type %0 is declared here">;
++ 
++ // C++11 Variadic Templates
++ def err_template_param_pack_default_arg : Error<
++   "template parameter pack cannot have a default argument">;
++ def err_template_param_pack_must_be_last_template_parameter : Error<
++   "template parameter pack must be the last template parameter">;
++ 
++ def err_template_parameter_pack_non_pack : Error<
++   "%select{template type|non-type template|template template}0 parameter"
++   "%select{| pack}1 conflicts with previous %select{template type|"
++   "non-type template|template template}0 parameter%select{ pack|}1">;
++ def note_template_parameter_pack_non_pack : Note<
++   "%select{template type|non-type template|template template}0 parameter"
++   "%select{| pack}1 does not match %select{template type|non-type template"
++   "|template template}0 parameter%select{ pack|}1 in template argument">;
++ def note_template_parameter_pack_here : Note<
++   "previous %select{template type|non-type template|template template}0 "
++   "parameter%select{| pack}1 declared here">;
++ 
++ def err_unexpanded_parameter_pack : Error<
++   "%select{expression|base type|declaration type|data member type|bit-field "
++   "size|static assertion|fixed underlying type|enumerator value|"
++   "using declaration|friend declaration|qualifier|initializer|default argument|"
++   "non-type template parameter type|exception type|partial specialization|"
++   "__if_exists name|__if_not_exists name|lambda|block|type constraint|"
++   "requirement|requires clause}0 "
++   "contains%plural{0: an|:}1 unexpanded parameter pack"
++   "%plural{0:|1: %2|2:s %2 and %3|:s %2, %3, ...}1">;
++ 
++ def err_pack_expansion_without_parameter_packs : Error<
++   "pack expansion does not contain any unexpanded parameter packs">;
++ def err_pack_expansion_length_conflict : Error<
++   "pack expansion contains parameter packs %0 and %1 that have different "
++   "lengths (%2 vs. %3)">;
++ def err_pack_expansion_length_conflict_multilevel : Error<
++   "pack expansion contains parameter pack %0 that has a different "
++   "length (%1 vs. %2) from outer parameter packs">;
++ def err_pack_expansion_length_conflict_partial : Error<
++   "pack expansion contains parameter pack %0 that has a different "
++   "length (at least %1 vs. %2) from outer parameter packs">;
++ def err_pack_expansion_member_init : Error<
++   "pack expansion for initialization of member %0">;
++ 
++ def err_function_parameter_pack_without_parameter_packs : Error<
++   "type %0 of function parameter pack does not contain any unexpanded "
++   "parameter packs">;
++ def err_ellipsis_in_declarator_not_parameter : Error<
++   "only function and template parameters can be parameter packs">;
++ 
++ def err_sizeof_pack_no_pack_name : Error<
++   "%0 does not refer to the name of a parameter pack">;
++ 
++ def err_fold_expression_packs_both_sides : Error<
++   "binary fold expression has unexpanded parameter packs in both operands">;
++ def err_fold_expression_empty : Error<
++   "unary fold expression has empty expansion for operator '%0' "
++   "with no fallback value">;
++ def err_fold_expression_bad_operand : Error<
++   "expression not permitted as operand of fold expression">;
++ def err_fold_expression_limit_exceeded: Error<
++   "instantiating fold expression with %0 arguments exceeded expression nesting "
++   "limit of %1">, DefaultFatal, NoSFINAE;
++ 
++ def err_unexpected_typedef : Error<
++   "unexpected type name %0: expected expression">;
++ def err_unexpected_namespace : Error<
++   "unexpected namespace name %0: expected expression">;
++ def err_undeclared_var_use : Error<"use of undeclared identifier %0">;
++ def ext_undeclared_unqual_id_with_dependent_base : ExtWarn<
++   "use of undeclared identifier %0; "
++   "unqualified lookup into dependent bases of class template %1 is a Microsoft extension">,
++   InGroup<MicrosoftTemplate>;
++ def err_found_in_dependent_base : Error<
++   "explicit qualification required to use member %0 from dependent base class">;
++ def ext_found_in_dependent_base : ExtWarn<"use of member %0 "
++   "found via unqualified lookup into dependent bases of class templates is a "
++   "Microsoft extension">, InGroup<MicrosoftTemplate>;
++ def err_found_later_in_class : Error<"member %0 used before its declaration">;
++ def ext_found_later_in_class : ExtWarn<
++   "use of member %0 before its declaration is a Microsoft extension">,
++   InGroup<MicrosoftTemplate>;
++ def note_dependent_member_use : Note<
++   "must qualify identifier to find this declaration in dependent base class">;
++ def err_not_found_by_two_phase_lookup : Error<"call to function %0 that is neither "
++     "visible in the template definition nor found by argument-dependent lookup">;
++ def note_not_found_by_two_phase_lookup : Note<"%0 should be declared prior to the "
++     "call site%select{| or in %2| or in an associated namespace of one of its arguments}1">;
++ def err_undeclared_use : Error<"use of undeclared %0">;
++ def warn_deprecated : Warning<"%0 is deprecated">,
++     InGroup<DeprecatedDeclarations>;
++ def note_from_diagnose_if : Note<"from 'diagnose_if' attribute on %0:">;
++ def warn_property_method_deprecated :
++     Warning<"property access is using %0 method which is deprecated">,
++     InGroup<DeprecatedDeclarations>;
++ def warn_deprecated_message : Warning<"%0 is deprecated: %1">,
++     InGroup<DeprecatedDeclarations>;
++ def warn_deprecated_anonymous_namespace : Warning<
++   "'deprecated' attribute on anonymous namespace ignored">,
++   InGroup<IgnoredAttributes>;
++ def warn_deprecated_fwdclass_message : Warning<
++     "%0 may be deprecated because the receiver type is unknown">,
++     InGroup<DeprecatedDeclarations>;
++ def warn_deprecated_def : Warning<
++   "implementing deprecated %select{method|class|category}0">,
++   InGroup<DeprecatedImplementations>, DefaultIgnore;
++ def warn_unavailable_def : Warning<
++   "implementing unavailable method">,
++   InGroup<DeprecatedImplementations>, DefaultIgnore;
++ def err_unavailable : Error<"%0 is unavailable">;
++ def err_property_method_unavailable :
++     Error<"property access is using %0 method which is unavailable">;
++ def err_unavailable_message : Error<"%0 is unavailable: %1">;
++ def warn_unavailable_fwdclass_message : Warning<
++     "%0 may be unavailable because the receiver type is unknown">,
++     InGroup<UnavailableDeclarations>;
++ def note_availability_specified_here : Note<
++   "%0 has been explicitly marked "
++   "%select{unavailable|deleted|deprecated}1 here">;
++ def note_partial_availability_specified_here : Note<
++   "%0 has been marked as being introduced in %1 %2 here, "
++   "but the deployment target is %1 %3">;
++ def note_implicitly_deleted : Note<
++   "explicitly defaulted function was implicitly deleted here">;
++ def warn_not_enough_argument : Warning<
++   "not enough variable arguments in %0 declaration to fit a sentinel">,
++   InGroup<Sentinel>;
++ def warn_missing_sentinel : Warning <
++   "missing sentinel in %select{function call|method dispatch|block call}0">,
++   InGroup<Sentinel>;
++ def note_sentinel_here : Note<
++   "%select{function|method|block}0 has been explicitly marked sentinel here">;
++ def warn_missing_prototype : Warning<
++   "no previous prototype for function %0">,
++   InGroup<DiagGroup<"missing-prototypes">>, DefaultIgnore;
++ def note_declaration_not_a_prototype : Note<
++   "this declaration is not a prototype; add %select{'void'|parameter declarations}0 "
++   "to make it %select{a prototype for a zero-parameter function|one}0">;
++ def warn_strict_prototypes : Warning<
++   "this %select{function declaration is not|block declaration is not|"
++   "old-style function definition is not preceded by}0 a prototype">,
++   InGroup<DiagGroup<"strict-prototypes">>, DefaultIgnore;
++ def warn_missing_variable_declarations : Warning<
++   "no previous extern declaration for non-static variable %0">,
++   InGroup<DiagGroup<"missing-variable-declarations">>, DefaultIgnore;
++ def note_static_for_internal_linkage : Note<
++   "declare 'static' if the %select{variable|function}0 is not intended to be "
++   "used outside of this translation unit">;
++ def err_static_data_member_reinitialization :
++   Error<"static data member %0 already has an initializer">;
++ def err_redefinition : Error<"redefinition of %0">;
++ def err_alias_after_tentative :
++   Error<"alias definition of %0 after tentative definition">;
++ def err_alias_is_definition :
++   Error<"definition %0 cannot also be an %select{alias|ifunc}1">;
++ def err_definition_of_implicitly_declared_member : Error<
++   "definition of implicitly declared %select{default constructor|copy "
++   "constructor|move constructor|copy assignment operator|move assignment "
++   "operator|destructor|function}1">;
++ def err_definition_of_explicitly_defaulted_member : Error<
++   "definition of explicitly defaulted %select{default constructor|copy "
++   "constructor|move constructor|copy assignment operator|move assignment "
++   "operator|destructor|function}0">;
++ def err_redefinition_extern_inline : Error<
++   "redefinition of a 'extern inline' function %0 is not supported in "
++   "%select{C99 mode|C++}1">;
++ def warn_attr_abi_tag_namespace : Warning<
++   "'abi_tag' attribute on %select{non-inline|anonymous}0 namespace ignored">,
++   InGroup<IgnoredAttributes>;
++ def err_abi_tag_on_redeclaration : Error<
++   "cannot add 'abi_tag' attribute in a redeclaration">;
++ def err_new_abi_tag_on_redeclaration : Error<
++   "'abi_tag' %0 missing in original declaration">;
++ def note_use_ifdef_guards : Note<
++   "unguarded header; consider using #ifdef guards or #pragma once">;
++ 
++ def note_deleted_dtor_no_operator_delete : Note<
++   "virtual destructor requires an unambiguous, accessible 'operator delete'">;
++ def note_deleted_special_member_class_subobject : Note<
++   "%select{default constructor of|copy constructor of|move constructor of|"
++   "copy assignment operator of|move assignment operator of|destructor of|"
++   "constructor inherited by}0 "
++   "%1 is implicitly deleted because "
++   "%select{base class %3|%select{||||variant }4field %3}2 "
++   "%select{has "
++   "%select{no|a deleted|multiple|an inaccessible|a non-trivial}4 "
++   "%select{%select{default constructor|copy constructor|move constructor|copy "
++   "assignment operator|move assignment operator|destructor|"
++   "%select{default|corresponding|default|default|default}4 constructor}0|"
++   "destructor}5"
++   "%select{||s||}4"
++   "|is an ObjC pointer}6">;
++ def note_deleted_default_ctor_uninit_field : Note<
++   "%select{default constructor of|constructor inherited by}0 "
++   "%1 is implicitly deleted because field %2 of "
++   "%select{reference|const-qualified}4 type %3 would not be initialized">;
++ def note_deleted_default_ctor_all_const : Note<
++   "%select{default constructor of|constructor inherited by}0 "
++   "%1 is implicitly deleted because all "
++   "%select{data members|data members of an anonymous union member}2"
++   " are const-qualified">;
++ def note_deleted_copy_ctor_rvalue_reference : Note<
++   "copy constructor of %0 is implicitly deleted because field %1 is of "
++   "rvalue reference type %2">;
++ def note_deleted_copy_user_declared_move : Note<
++   "copy %select{constructor|assignment operator}0 is implicitly deleted because"
++   " %1 has a user-declared move %select{constructor|assignment operator}2">;
++ def note_deleted_assign_field : Note<
++   "%select{copy|move}0 assignment operator of %1 is implicitly deleted "
++   "because field %2 is of %select{reference|const-qualified}4 type %3">;
++ 
++ // These should be errors.
++ def warn_undefined_internal : Warning<
++   "%select{function|variable}0 %q1 has internal linkage but is not defined">,
++   InGroup<DiagGroup<"undefined-internal">>;
++ def err_undefined_internal_type : Error<
++   "%select{function|variable}0 %q1 is used but not defined in this "
++   "translation unit, and cannot be defined in any other translation unit "
++   "because its type does not have linkage">;
++ def ext_undefined_internal_type : Extension<
++   "ISO C++ requires a definition in this translation unit for "
++   "%select{function|variable}0 %q1 because its type does not have linkage">,
++   InGroup<DiagGroup<"undefined-internal-type">>;
++ def warn_undefined_inline : Warning<"inline function %q0 is not defined">,
++   InGroup<DiagGroup<"undefined-inline">>;
++ def err_undefined_inline_var : Error<"inline variable %q0 is not defined">;
++ def note_used_here : Note<"used here">;
++ 
++ def err_attribute_missing_on_first_decl : Error<
++   "%0 attribute does not appear on the first declaration">;
++ def warn_internal_linkage_local_storage : Warning<
++   "'internal_linkage' attribute on a non-static local variable is ignored">,
++   InGroup<IgnoredAttributes>;
++ 
++ def ext_internal_in_extern_inline : ExtWarn<
++   "static %select{function|variable}0 %1 is used in an inline function with "
++   "external linkage">, InGroup<StaticInInline>;
++ def ext_internal_in_extern_inline_quiet : Extension<
++   "static %select{function|variable}0 %1 is used in an inline function with "
++   "external linkage">, InGroup<StaticInInline>;
++ def warn_static_local_in_extern_inline : Warning<
++   "non-constant static local variable in inline function may be different "
++   "in different files">, InGroup<StaticLocalInInline>;
++ def note_convert_inline_to_static : Note<
++   "use 'static' to give inline function %0 internal linkage">;
++ 
++ def ext_redefinition_of_typedef : ExtWarn<
++   "redefinition of typedef %0 is a C11 feature">,
++   InGroup<DiagGroup<"typedef-redefinition"> >;
++ def err_redefinition_variably_modified_typedef : Error<
++   "redefinition of %select{typedef|type alias}0 for variably-modified type %1">;
++ 
++ def err_inline_decl_follows_def : Error<
++   "inline declaration of %0 follows non-inline definition">;
++ def err_inline_declaration_block_scope : Error<
++   "inline declaration of %0 not allowed in block scope">;
++ def err_static_non_static : Error<
++   "static declaration of %0 follows non-static declaration">;
++ def err_different_language_linkage : Error<
++   "declaration of %0 has a different language linkage">;
++ def ext_retained_language_linkage : Extension<
++   "friend function %0 retaining previous language linkage is an extension">,
++   InGroup<DiagGroup<"retained-language-linkage">>;
++ def err_extern_c_global_conflict : Error<
++   "declaration of %1 %select{with C language linkage|in global scope}0 "
++   "conflicts with declaration %select{in global scope|with C language linkage}0">;
++ def note_extern_c_global_conflict : Note<
++   "declared %select{in global scope|with C language linkage}0 here">;
++ def note_extern_c_begins_here : Note<
++   "extern \"C\" language linkage specification begins here">;
++ def warn_weak_import : Warning <
++   "an already-declared variable is made a weak_import declaration %0">;
++ def ext_static_non_static : Extension<
++   "redeclaring non-static %0 as static is a Microsoft extension">,
++   InGroup<MicrosoftRedeclareStatic>;
++ def err_non_static_static : Error<
++   "non-static declaration of %0 follows static declaration">;
++ def err_extern_non_extern : Error<
++   "extern declaration of %0 follows non-extern declaration">;
++ def err_non_extern_extern : Error<
++   "non-extern declaration of %0 follows extern declaration">;
++ def err_non_thread_thread : Error<
++   "non-thread-local declaration of %0 follows thread-local declaration">;
++ def err_thread_non_thread : Error<
++   "thread-local declaration of %0 follows non-thread-local declaration">;
++ def err_thread_thread_different_kind : Error<
++   "thread-local declaration of %0 with %select{static|dynamic}1 initialization "
++   "follows declaration with %select{dynamic|static}1 initialization">;
++ def err_mismatched_owning_module : Error<
++   "declaration of %0 in %select{the global module|module %2}1 follows "
++   "declaration in %select{the global module|module %4}3">;
++ def err_redefinition_different_type : Error<
++   "redefinition of %0 with a different type%diff{: $ vs $|}1,2">;
++ def err_redefinition_different_kind : Error<
++   "redefinition of %0 as different kind of symbol">;
++ def err_redefinition_different_namespace_alias : Error<
++   "redefinition of %0 as an alias for a different namespace">;
++ def note_previous_namespace_alias : Note<
++   "previously defined as an alias for %0">;
++ def warn_forward_class_redefinition : Warning<
++   "redefinition of forward class %0 of a typedef name of an object type is ignored">,
++   InGroup<DiagGroup<"objc-forward-class-redefinition">>;
++ def err_redefinition_different_typedef : Error<
++   "%select{typedef|type alias|type alias template}0 "
++   "redefinition with different types%diff{ ($ vs $)|}1,2">;
++ def err_tag_reference_non_tag : Error<
++   "%select{non-struct type|non-class type|non-union type|non-enum "
++   "type|typedef|type alias|template|type alias template|template "
++   "template argument}1 %0 cannot be referenced with a "
++   "%select{struct|interface|union|class|enum}2 specifier">;
++ def err_tag_reference_conflict : Error<
++   "implicit declaration introduced by elaborated type conflicts with a "
++   "%select{non-struct type|non-class type|non-union type|non-enum "
++   "type|typedef|type alias|template|type alias template|template "
++   "template argument}0 of the same name">;
++ def err_dependent_tag_decl : Error<
++   "%select{declaration|definition}0 of "
++   "%select{struct|interface|union|class|enum}1 in a dependent scope">;
++ def err_tag_definition_of_typedef : Error<
++   "definition of type %0 conflicts with %select{typedef|type alias}1 of the same name">;
++ def err_conflicting_types : Error<"conflicting types for %0">;
++ def err_different_pass_object_size_params : Error<
++   "conflicting pass_object_size attributes on parameters">;
++ def err_late_asm_label_name : Error<
++   "cannot apply asm label to %select{variable|function}0 after its first use">;
++ def err_different_asm_label : Error<"conflicting asm label">;
++ def err_nested_redefinition : Error<"nested redefinition of %0">;
++ def err_use_with_wrong_tag : Error<
++   "use of %0 with tag type that does not match previous declaration">;
++ def warn_struct_class_tag_mismatch : Warning<
++   "%select{struct|interface|class}0%select{| template}1 %2 was previously "
++   "declared as a %select{struct|interface|class}3%select{| template}1; "
++   "this is valid, but may result in linker errors under the Microsoft C++ ABI">,
++   InGroup<MismatchedTags>, DefaultIgnore;
++ def warn_struct_class_previous_tag_mismatch : Warning<
++   "%2 defined as %select{a struct|an interface|a class}0%select{| template}1 "
++   "here but previously declared as "
++   "%select{a struct|an interface|a class}3%select{| template}1; "
++   "this is valid, but may result in linker errors under the Microsoft C++ ABI">,
++   InGroup<MismatchedTags>, DefaultIgnore;
++ def note_struct_class_suggestion : Note<
++   "did you mean %select{struct|interface|class}0 here?">;
++ def ext_forward_ref_enum : Extension<
++   "ISO C forbids forward references to 'enum' types">;
++ def err_forward_ref_enum : Error<
++   "ISO C++ forbids forward references to 'enum' types">;
++ def ext_ms_forward_ref_enum : ExtWarn<
++   "forward references to 'enum' types are a Microsoft extension">,
++   InGroup<MicrosoftEnumForwardReference>;
++ def ext_forward_ref_enum_def : Extension<
++   "redeclaration of already-defined enum %0 is a GNU extension">,
++   InGroup<GNURedeclaredEnum>;
++ 
++ def err_redefinition_of_enumerator : Error<"redefinition of enumerator %0">;
++ def err_duplicate_member : Error<"duplicate member %0">;
++ def err_misplaced_ivar : Error<
++   "instance variables may not be placed in %select{categories|class extension}0">;
++ def warn_ivars_in_interface : Warning<
++   "declaration of instance variables in the interface is deprecated">,
++   InGroup<DiagGroup<"objc-interface-ivars">>, DefaultIgnore;
++ def ext_enum_value_not_int : Extension<
++   "ISO C restricts enumerator values to range of 'int' (%0 is too "
++   "%select{small|large}1)">;
++ def ext_enum_too_large : ExtWarn<
++   "enumeration values exceed range of largest integer">, InGroup<EnumTooLarge>;
++ def ext_enumerator_increment_too_large : ExtWarn<
++   "incremented enumerator value %0 is not representable in the "
++   "largest integer type">, InGroup<EnumTooLarge>;
++ def warn_flag_enum_constant_out_of_range : Warning<
++   "enumeration value %0 is out of range of flags in enumeration type %1">,
++   InGroup<FlagEnum>;
++ 
++ def err_vm_decl_in_file_scope : Error<
++   "variably modified type declaration not allowed at file scope">;
++ def err_vm_decl_has_extern_linkage : Error<
++   "variably modified type declaration cannot have 'extern' linkage">;
++ def err_typecheck_field_variable_size : Error<
++   "fields must have a constant size: 'variable length array in structure' "
++   "extension will never be supported">;
++ def err_vm_func_decl : Error<
++   "function declaration cannot have variably modified type">;
++ def err_array_too_large : Error<
++   "array is too large (%0 elements)">;
++ 
++ def err_typecheck_negative_array_size : Error<"array size is negative">;
++ def warn_typecheck_function_qualifiers_ignored : Warning<
++   "'%0' qualifier on function type %1 has no effect">,
++   InGroup<IgnoredQualifiers>;
++ def warn_typecheck_function_qualifiers_unspecified : Warning<
++   "'%0' qualifier on function type %1 has unspecified behavior">;
++ def warn_typecheck_reference_qualifiers : Warning<
++   "'%0' qualifier on reference type %1 has no effect">,
++   InGroup<IgnoredReferenceQualifiers>;
++ def err_typecheck_invalid_restrict_not_pointer : Error<
++   "restrict requires a pointer or reference (%0 is invalid)">;
++ def err_typecheck_invalid_restrict_not_pointer_noarg : Error<
++   "restrict requires a pointer or reference">;
++ def err_typecheck_invalid_restrict_invalid_pointee : Error<
++   "pointer to function type %0 may not be 'restrict' qualified">;
++ def ext_typecheck_zero_array_size : Extension<
++   "zero size arrays are an extension">, InGroup<ZeroLengthArray>;
++ def err_typecheck_zero_array_size : Error<
++   "zero-length arrays are not permitted in C++">;
++ def err_array_size_non_int : Error<"size of array has non-integer type %0">;
++ def err_init_element_not_constant : Error<
++   "initializer element is not a compile-time constant">;
++ def ext_aggregate_init_not_constant : Extension<
++   "initializer for aggregate is not a compile-time constant">, InGroup<C99>;
++ def err_local_cant_init : Error<
++   "'__local' variable cannot have an initializer">;
++ def err_loader_uninitialized_cant_init
++     : Error<"variable with 'loader_uninitialized' attribute cannot have an "
++             "initializer">;
++ def err_loader_uninitialized_trivial_ctor
++     : Error<"variable with 'loader_uninitialized' attribute must have a "
++             "trivial default constructor">;
++ def err_loader_uninitialized_redeclaration
++     : Error<"redeclaration cannot add 'loader_uninitialized' attribute">;
++ def err_loader_uninitialized_extern_decl
++     : Error<"variable %0 cannot be declared both 'extern' and with the "
++             "'loader_uninitialized' attribute">;
++ def err_block_extern_cant_init : Error<
++   "'extern' variable cannot have an initializer">;
++ def warn_extern_init : Warning<"'extern' variable has an initializer">,
++   InGroup<DiagGroup<"extern-initializer">>;
++ def err_variable_object_no_init : Error<
++   "variable-sized object may not be initialized">;
++ def err_excess_initializers : Error<
++   "excess elements in %select{array|vector|scalar|union|struct}0 initializer">;
++ def ext_excess_initializers : ExtWarn<
++   "excess elements in %select{array|vector|scalar|union|struct}0 initializer">,
++   InGroup<ExcessInitializers>;
++ def err_excess_initializers_for_sizeless_type : Error<
++   "excess elements in initializer for indivisible sizeless type %0">;
++ def ext_excess_initializers_for_sizeless_type : ExtWarn<
++   "excess elements in initializer for indivisible sizeless type %0">,
++   InGroup<ExcessInitializers>;
++ def err_excess_initializers_in_char_array_initializer : Error<
++   "excess elements in char array initializer">;
++ def ext_excess_initializers_in_char_array_initializer : ExtWarn<
++   "excess elements in char array initializer">,
++   InGroup<ExcessInitializers>;
++ def err_initializer_string_for_char_array_too_long : Error<
++   "initializer-string for char array is too long">;
++ def ext_initializer_string_for_char_array_too_long : ExtWarn<
++   "initializer-string for char array is too long">,
++   InGroup<ExcessInitializers>;
++ def warn_missing_field_initializers : Warning<
++   "missing field %0 initializer">,
++   InGroup<MissingFieldInitializers>, DefaultIgnore;
++ def warn_braces_around_init : Warning<
++   "braces around %select{scalar |}0initializer">,
++   InGroup<DiagGroup<"braced-scalar-init">>;
++ def ext_many_braces_around_init : ExtWarn<
++   "too many braces around %select{scalar |}0initializer">,
++   InGroup<DiagGroup<"many-braces-around-scalar-init">>, SFINAEFailure;
++ def ext_complex_component_init : Extension<
++   "complex initialization specifying real and imaginary components "
++   "is an extension">, InGroup<DiagGroup<"complex-component-init">>;
++ def err_empty_scalar_initializer : Error<"scalar initializer cannot be empty">;
++ def err_empty_sizeless_initializer : Error<
++   "initializer for sizeless type %0 cannot be empty">;
++ def warn_cxx98_compat_empty_scalar_initializer : Warning<
++   "scalar initialized from empty initializer list is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_cxx98_compat_empty_sizeless_initializer : Warning<
++   "initializing %0 from an empty initializer list is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_cxx98_compat_reference_list_init : Warning<
++   "reference initialized from initializer list is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_cxx98_compat_initializer_list_init : Warning<
++   "initialization of initializer_list object is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_cxx98_compat_ctor_list_init : Warning<
++   "constructor call from initializer list is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_illegal_initializer : Error<
++   "illegal initializer (only variables can be initialized)">;
++ def err_illegal_initializer_type : Error<"illegal initializer type %0">;
++ def ext_init_list_type_narrowing : ExtWarn<
++   "type %0 cannot be narrowed to %1 in initializer list">,
++   InGroup<CXX11Narrowing>, DefaultError, SFINAEFailure;
++ def ext_init_list_variable_narrowing : ExtWarn<
++   "non-constant-expression cannot be narrowed from type %0 to %1 in "
++   "initializer list">, InGroup<CXX11Narrowing>, DefaultError, SFINAEFailure;
++ def ext_init_list_constant_narrowing : ExtWarn<
++   "constant expression evaluates to %0 which cannot be narrowed to type %1">,
++   InGroup<CXX11Narrowing>, DefaultError, SFINAEFailure;
++ def warn_init_list_type_narrowing : Warning<
++   "type %0 cannot be narrowed to %1 in initializer list in C++11">,
++   InGroup<CXX11Narrowing>, DefaultIgnore;
++ def warn_init_list_variable_narrowing : Warning<
++   "non-constant-expression cannot be narrowed from type %0 to %1 in "
++   "initializer list in C++11">,
++   InGroup<CXX11Narrowing>, DefaultIgnore;
++ def warn_init_list_constant_narrowing : Warning<
++   "constant expression evaluates to %0 which cannot be narrowed to type %1 in "
++   "C++11">,
++   InGroup<CXX11Narrowing>, DefaultIgnore;
++ def note_init_list_narrowing_silence : Note<
++   "insert an explicit cast to silence this issue">;
++ def err_init_objc_class : Error<
++   "cannot initialize Objective-C class type %0">;
++ def err_implicit_empty_initializer : Error<
++   "initializer for aggregate with no elements requires explicit braces">;
++ def err_bitfield_has_negative_width : Error<
++   "bit-field %0 has negative width (%1)">;
++ def err_anon_bitfield_has_negative_width : Error<
++   "anonymous bit-field has negative width (%0)">;
++ def err_bitfield_has_zero_width : Error<"named bit-field %0 has zero width">;
++ def err_bitfield_width_exceeds_type_width : Error<
++   "width of%select{ anonymous|}0 bit-field%select{| %1}0 (%2 bits) exceeds the "
++   "%select{width|size}3 of its type (%4 bit%s4)">;
++ def err_incorrect_number_of_vector_initializers : Error<
++   "number of elements must be either one or match the size of the vector">;
++ 
++ // Used by C++ which allows bit-fields that are wider than the type.
++ def warn_bitfield_width_exceeds_type_width: Warning<
++   "width of bit-field %0 (%1 bits) exceeds the width of its type; value will "
++   "be truncated to %2 bit%s2">, InGroup<BitFieldWidth>;
++ def err_bitfield_too_wide : Error<
++   "%select{bit-field %1|anonymous bit-field}0 is too wide (%2 bits)">;
++ def warn_bitfield_too_small_for_enum : Warning<
++   "bit-field %0 is not wide enough to store all enumerators of %1">,
++   InGroup<BitFieldEnumConversion>, DefaultIgnore;
++ def note_widen_bitfield : Note<
++   "widen this field to %0 bits to store all values of %1">;
++ def warn_unsigned_bitfield_assigned_signed_enum : Warning<
++   "assigning value of signed enum type %1 to unsigned bit-field %0; "
++   "negative enumerators of enum %1 will be converted to positive values">,
++   InGroup<BitFieldEnumConversion>, DefaultIgnore;
++ def warn_signed_bitfield_enum_conversion : Warning<
++   "signed bit-field %0 needs an extra bit to represent the largest positive "
++   "enumerators of %1">,
++   InGroup<BitFieldEnumConversion>, DefaultIgnore;
++ def note_change_bitfield_sign : Note<
++   "consider making the bitfield type %select{unsigned|signed}0">;
++ 
++ def warn_missing_braces : Warning<
++   "suggest braces around initialization of subobject">,
++   InGroup<MissingBraces>, DefaultIgnore;
++ 
++ def err_redefinition_of_label : Error<"redefinition of label %0">;
++ def err_undeclared_label_use : Error<"use of undeclared label %0">;
++ def err_goto_ms_asm_label : Error<
++   "cannot jump from this goto statement to label %0 inside an inline assembly block">;
++ def note_goto_ms_asm_label : Note<
++   "inline assembly label %0 declared here">;
++ def warn_unused_label : Warning<"unused label %0">,
++   InGroup<UnusedLabel>, DefaultIgnore;
++ 
++ def err_continue_from_cond_var_init : Error<
++   "cannot jump from this continue statement to the loop increment; "
++   "jump bypasses initialization of loop condition variable">;
++ def err_goto_into_protected_scope : Error<
++   "cannot jump from this goto statement to its label">;
++ def ext_goto_into_protected_scope : ExtWarn<
++   "jump from this goto statement to its label is a Microsoft extension">,
++   InGroup<MicrosoftGoto>;
++ def warn_cxx98_compat_goto_into_protected_scope : Warning<
++   "jump from this goto statement to its label is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_switch_into_protected_scope : Error<
++   "cannot jump from switch statement to this case label">;
++ def warn_cxx98_compat_switch_into_protected_scope : Warning<
++   "jump from switch statement to this case label is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def err_indirect_goto_without_addrlabel : Error<
++   "indirect goto in function with no address-of-label expressions">;
++ def err_indirect_goto_in_protected_scope : Error<
++   "cannot jump from this %select{indirect|asm}0 goto statement to one of its possible targets">;
++ def warn_cxx98_compat_indirect_goto_in_protected_scope : Warning<
++   "jump from this %select{indirect|asm}0 goto statement to one of its possible targets "
++   "is incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def note_indirect_goto_target : Note<
++   "possible target of %select{indirect|asm}0 goto statement">;
++ def note_protected_by_variable_init : Note<
++   "jump bypasses variable initialization">;
++ def note_protected_by_variable_nontriv_destructor : Note<
++   "jump bypasses variable with a non-trivial destructor">;
++ def note_protected_by_variable_non_pod : Note<
++   "jump bypasses initialization of non-POD variable">;
++ def note_protected_by_cleanup : Note<
++   "jump bypasses initialization of variable with __attribute__((cleanup))">;
++ def note_protected_by_vla_typedef : Note<
++   "jump bypasses initialization of VLA typedef">;
++ def note_protected_by_vla_type_alias : Note<
++   "jump bypasses initialization of VLA type alias">;
++ def note_protected_by_constexpr_if : Note<
++   "jump enters controlled statement of constexpr if">;
++ def note_protected_by_if_available : Note<
++   "jump enters controlled statement of if available">;
++ def note_protected_by_vla : Note<
++   "jump bypasses initialization of variable length array">;
++ def note_protected_by_objc_fast_enumeration : Note<
++   "jump enters Objective-C fast enumeration loop">;
++ def note_protected_by_objc_try : Note<
++   "jump bypasses initialization of @try block">;
++ def note_protected_by_objc_catch : Note<
++   "jump bypasses initialization of @catch block">;
++ def note_protected_by_objc_finally : Note<
++   "jump bypasses initialization of @finally block">;
++ def note_protected_by_objc_synchronized : Note<
++   "jump bypasses initialization of @synchronized block">;
++ def note_protected_by_objc_autoreleasepool : Note<
++   "jump bypasses auto release push of @autoreleasepool block">;
++ def note_protected_by_cxx_try : Note<
++   "jump bypasses initialization of try block">;
++ def note_protected_by_cxx_catch : Note<
++   "jump bypasses initialization of catch block">;
++ def note_protected_by_seh_try : Note<
++   "jump bypasses initialization of __try block">;
++ def note_protected_by_seh_except : Note<
++   "jump bypasses initialization of __except block">;
++ def note_protected_by_seh_finally : Note<
++   "jump bypasses initialization of __finally block">;
++ def note_protected_by___block : Note<
++   "jump bypasses setup of __block variable">;
++ def note_protected_by_objc_strong_init : Note<
++   "jump bypasses initialization of __strong variable">;
++ def note_protected_by_objc_weak_init : Note<
++   "jump bypasses initialization of __weak variable">;
++ def note_protected_by_non_trivial_c_struct_init : Note<
++   "jump bypasses initialization of variable of non-trivial C struct type">;
++ def note_enters_block_captures_cxx_obj : Note<
++   "jump enters lifetime of block which captures a destructible C++ object">;
++ def note_enters_block_captures_strong : Note<
++   "jump enters lifetime of block which strongly captures a variable">;
++ def note_enters_block_captures_weak : Note<
++   "jump enters lifetime of block which weakly captures a variable">;
++ def note_enters_block_captures_non_trivial_c_struct : Note<
++   "jump enters lifetime of block which captures a C struct that is non-trivial "
++   "to destroy">;
++ def note_enters_compound_literal_scope : Note<
++   "jump enters lifetime of a compound literal that is non-trivial to destruct">;
++ 
++ def note_exits_cleanup : Note<
++   "jump exits scope of variable with __attribute__((cleanup))">;
++ def note_exits_dtor : Note<
++   "jump exits scope of variable with non-trivial destructor">;
++ def note_exits_temporary_dtor : Note<
++   "jump exits scope of lifetime-extended temporary with non-trivial "
++   "destructor">;
++ def note_exits___block : Note<
++   "jump exits scope of __block variable">;
++ def note_exits_objc_try : Note<
++   "jump exits @try block">;
++ def note_exits_objc_catch : Note<
++   "jump exits @catch block">;
++ def note_exits_objc_finally : Note<
++   "jump exits @finally block">;
++ def note_exits_objc_synchronized : Note<
++   "jump exits @synchronized block">;
++ def note_exits_cxx_try : Note<
++   "jump exits try block">;
++ def note_exits_cxx_catch : Note<
++   "jump exits catch block">;
++ def note_exits_seh_try : Note<
++   "jump exits __try block">;
++ def note_exits_seh_except : Note<
++   "jump exits __except block">;
++ def note_exits_seh_finally : Note<
++   "jump exits __finally block">;
++ def note_exits_objc_autoreleasepool : Note<
++   "jump exits autoreleasepool block">;
++ def note_exits_objc_strong : Note<
++   "jump exits scope of __strong variable">;
++ def note_exits_objc_weak : Note<
++   "jump exits scope of __weak variable">;
++ def note_exits_block_captures_cxx_obj : Note<
++   "jump exits lifetime of block which captures a destructible C++ object">;
++ def note_exits_block_captures_strong : Note<
++   "jump exits lifetime of block which strongly captures a variable">;
++ def note_exits_block_captures_weak : Note<
++   "jump exits lifetime of block which weakly captures a variable">;
++ def note_exits_block_captures_non_trivial_c_struct : Note<
++   "jump exits lifetime of block which captures a C struct that is non-trivial "
++   "to destroy">;
++ def note_exits_compound_literal_scope : Note<
++   "jump exits lifetime of a compound literal that is non-trivial to destruct">;
++ 
++ def err_func_returning_qualified_void : ExtWarn<
++   "function cannot return qualified void type %0">,
++   InGroup<DiagGroup<"qualified-void-return-type">>;
++ def err_func_returning_array_function : Error<
++   "function cannot return %select{array|function}0 type %1">;
++ def err_field_declared_as_function : Error<"field %0 declared as a function">;
++ def err_field_incomplete_or_sizeless : Error<
++   "field has %select{incomplete|sizeless}0 type %1">;
++ def ext_variable_sized_type_in_struct : ExtWarn<
++   "field %0 with variable sized type %1 not at the end of a struct or class is"
++   " a GNU extension">, InGroup<GNUVariableSizedTypeNotAtEnd>;
++ 
++ def ext_c99_flexible_array_member : Extension<
++   "flexible array members are a C99 feature">, InGroup<C99>;
++ def err_flexible_array_virtual_base : Error<
++   "flexible array member %0 not allowed in "
++   "%select{struct|interface|union|class|enum}1 which has a virtual base class">;
++ def err_flexible_array_empty_aggregate : Error<
++   "flexible array member %0 not allowed in otherwise empty "
++   "%select{struct|interface|union|class|enum}1">;
++ def err_flexible_array_has_nontrivial_dtor : Error<
++   "flexible array member %0 of type %1 with non-trivial destruction">;
++ def ext_flexible_array_in_struct : Extension<
++   "%0 may not be nested in a struct due to flexible array member">,
++   InGroup<FlexibleArrayExtensions>;
++ def ext_flexible_array_in_array : Extension<
++   "%0 may not be used as an array element due to flexible array member">,
++   InGroup<FlexibleArrayExtensions>;
++ def err_flexible_array_init : Error<
++   "initialization of flexible array member is not allowed">;
++ def ext_flexible_array_empty_aggregate_ms : Extension<
++   "flexible array member %0 in otherwise empty "
++   "%select{struct|interface|union|class|enum}1 is a Microsoft extension">,
++   InGroup<MicrosoftFlexibleArray>;
++ def err_flexible_array_union : Error<
++   "flexible array member %0 in a union is not allowed">;
++ def ext_flexible_array_union_ms : Extension<
++   "flexible array member %0 in a union is a Microsoft extension">,
++   InGroup<MicrosoftFlexibleArray>;
++ def ext_flexible_array_empty_aggregate_gnu : Extension<
++   "flexible array member %0 in otherwise empty "
++   "%select{struct|interface|union|class|enum}1 is a GNU extension">,
++   InGroup<GNUEmptyStruct>;
++ def ext_flexible_array_union_gnu : Extension<
++   "flexible array member %0 in a union is a GNU extension">, InGroup<GNUFlexibleArrayUnionMember>;
++ 
++ def err_flexible_array_not_at_end : Error<
++   "flexible array member %0 with type %1 is not at the end of"
++   " %select{struct|interface|union|class|enum}2">;
++ def err_objc_variable_sized_type_not_at_end : Error<
++   "field %0 with variable sized type %1 is not at the end of class">;
++ def note_next_field_declaration : Note<
++   "next field declaration is here">;
++ def note_next_ivar_declaration : Note<
++   "next %select{instance variable declaration|synthesized instance variable}0"
++   " is here">;
++ def err_synthesize_variable_sized_ivar : Error<
++   "synthesized property with variable size type %0"
++   " requires an existing instance variable">;
++ def err_flexible_array_arc_retainable : Error<
++   "ARC forbids flexible array members with retainable object type">;
++ def warn_variable_sized_ivar_visibility : Warning<
++   "field %0 with variable sized type %1 is not visible to subclasses and"
++   " can conflict with their instance variables">, InGroup<ObjCFlexibleArray>;
++ def warn_superclass_variable_sized_type_not_at_end : Warning<
++   "field %0 can overwrite instance variable %1 with variable sized type %2"
++   " in superclass %3">, InGroup<ObjCFlexibleArray>;
++ 
++ let CategoryName = "ARC Semantic Issue" in {
++ 
++ // ARC-mode diagnostics.
++ 
++ let CategoryName = "ARC Weak References" in {
++ 
++ def err_arc_weak_no_runtime : Error<
++   "cannot create __weak reference because the current deployment target "
++   "does not support weak references">;
++ def err_arc_weak_disabled : Error<
++   "cannot create __weak reference in file using manual reference counting">;
++ def err_synthesizing_arc_weak_property_disabled : Error<
++   "cannot synthesize weak property in file using manual reference counting">;
++ def err_synthesizing_arc_weak_property_no_runtime : Error<
++   "cannot synthesize weak property because the current deployment target "
++   "does not support weak references">;
++ def err_arc_unsupported_weak_class : Error<
++   "class is incompatible with __weak references">;
++ def err_arc_weak_unavailable_assign : Error<
++   "assignment of a weak-unavailable object to a __weak object">;
++ def err_arc_weak_unavailable_property : Error<
++   "synthesizing __weak instance variable of type %0, which does not "
++   "support weak references">;
++ def note_implemented_by_class : Note<
++   "when implemented by class %0">;
++ def err_arc_convesion_of_weak_unavailable : Error<
++   "%select{implicit conversion|cast}0 of weak-unavailable object of type %1 to"
++   " a __weak object of type %2">;
++ 
++ } // end "ARC Weak References" category
++ 
++ let CategoryName = "ARC Restrictions" in {
++ 
++ def err_unavailable_in_arc : Error<
++   "%0 is unavailable in ARC">;
++ def note_arc_forbidden_type : Note<
++   "declaration uses type that is ill-formed in ARC">;
++ def note_performs_forbidden_arc_conversion : Note<
++   "inline function performs a conversion which is forbidden in ARC">;
++ def note_arc_init_returns_unrelated : Note<
++   "init method must return a type related to its receiver type">;
++ def note_arc_weak_disabled : Note<
++   "declaration uses __weak, but ARC is disabled">;
++ def note_arc_weak_no_runtime : Note<"declaration uses __weak, which "
++   "the current deployment target does not support">;
++ def note_arc_field_with_ownership : Note<
++   "field has non-trivial ownership qualification">;
++ 
++ def err_arc_illegal_explicit_message : Error<
++   "ARC forbids explicit message send of %0">;
++ def err_arc_unused_init_message : Error<
++   "the result of a delegate init call must be immediately returned "
++   "or assigned to 'self'">;
++ def err_arc_mismatched_cast : Error<
++   "%select{implicit conversion|cast}0 of "
++   "%select{%2|a non-Objective-C pointer type %2|a block pointer|"
++   "an Objective-C pointer|an indirect pointer to an Objective-C pointer}1"
++   " to %3 is disallowed with ARC">;
++ def err_arc_nolifetime_behavior : Error<
++   "explicit ownership qualifier on cast result has no effect">;
++ def err_arc_objc_property_default_assign_on_object : Error<
++   "ARC forbids synthesizing a property of an Objective-C object "
++   "with unspecified ownership or storage attribute">;
++ def err_arc_illegal_selector : Error<
++   "ARC forbids use of %0 in a @selector">;
++ def err_arc_illegal_method_def : Error<
++   "ARC forbids %select{implementation|synthesis}0 of %1">;
++ def warn_arc_strong_pointer_objc_pointer : Warning<
++   "method parameter of type %0 with no explicit ownership">,
++   InGroup<DiagGroup<"explicit-ownership-type">>, DefaultIgnore;
++ 
++ } // end "ARC Restrictions" category
++ 
++ def err_arc_lost_method_convention : Error<
++   "method was declared as %select{an 'alloc'|a 'copy'|an 'init'|a 'new'}0 "
++   "method, but its implementation doesn't match because %select{"
++   "its result type is not an object pointer|"
++   "its result type is unrelated to its receiver type}1">;
++ def note_arc_lost_method_convention : Note<"declaration in interface">;
++ def err_arc_gained_method_convention : Error<
++   "method implementation does not match its declaration">;
++ def note_arc_gained_method_convention : Note<
++   "declaration in interface is not in the '%select{alloc|copy|init|new}0' "
++   "family because %select{its result type is not an object pointer|"
++   "its result type is unrelated to its receiver type}1">;
++ def err_typecheck_arc_assign_self : Error<
++   "cannot assign to 'self' outside of a method in the init family">;
++ def err_typecheck_arc_assign_self_class_method : Error<
++   "cannot assign to 'self' in a class method">;
++ def err_typecheck_arr_assign_enumeration : Error<
++   "fast enumeration variables cannot be modified in ARC by default; "
++   "declare the variable __strong to allow this">;
++ def err_typecheck_arc_assign_externally_retained : Error<
++   "variable declared with 'objc_externally_retained' "
++   "cannot be modified in ARC">;
++ def warn_arc_retained_assign : Warning<
++   "assigning retained object to %select{weak|unsafe_unretained}0 "
++   "%select{property|variable}1"
++   "; object will be released after assignment">,
++   InGroup<ARCUnsafeRetainedAssign>;
++ def warn_arc_retained_property_assign : Warning<
++   "assigning retained object to unsafe property"
++   "; object will be released after assignment">,
++   InGroup<ARCUnsafeRetainedAssign>;
++ def warn_arc_literal_assign : Warning<
++   "assigning %select{array literal|dictionary literal|numeric literal|boxed expression|<should not happen>|block literal}0"
++   " to a weak %select{property|variable}1"
++   "; object will be released after assignment">,
++   InGroup<ARCUnsafeRetainedAssign>;
++ def err_arc_new_array_without_ownership : Error<
++   "'new' cannot allocate an array of %0 with no explicit ownership">;
++ def err_arc_autoreleasing_var : Error<
++   "%select{__block variables|global variables|fields|instance variables}0 cannot have "
++   "__autoreleasing ownership">;
++ def err_arc_autoreleasing_capture : Error<
++   "cannot capture __autoreleasing variable in a "
++   "%select{block|lambda by copy}0">;
++ def err_arc_thread_ownership : Error<
++   "thread-local variable has non-trivial ownership: type is %0">;
++ def err_arc_indirect_no_ownership : Error<
++   "%select{pointer|reference}1 to non-const type %0 with no explicit ownership">;
++ def err_arc_array_param_no_ownership : Error<
++   "must explicitly describe intended ownership of an object array parameter">;
++ def err_arc_pseudo_dtor_inconstant_quals : Error<
++   "pseudo-destructor destroys object of type %0 with inconsistently-qualified "
++   "type %1">;
++ def err_arc_init_method_unrelated_result_type : Error<
++   "init methods must return a type related to the receiver type">;
++ def err_arc_nonlocal_writeback : Error<
++   "passing address of %select{non-local|non-scalar}0 object to "
++   "__autoreleasing parameter for write-back">;
++ def err_arc_method_not_found : Error<
++   "no known %select{instance|class}1 method for selector %0">;
++ def err_arc_receiver_forward_class : Error<
++   "receiver %0 for class message is a forward declaration">;
++ def err_arc_may_not_respond : Error<
++   "no visible @interface for %0 declares the selector %1">;
++ def err_arc_receiver_forward_instance : Error<
++   "receiver type %0 for instance message is a forward declaration">;
++ def warn_receiver_forward_instance : Warning<
++   "receiver type %0 for instance message is a forward declaration">,
++   InGroup<ForwardClassReceiver>, DefaultIgnore;
++ def err_arc_collection_forward : Error<
++   "collection expression type %0 is a forward declaration">;
++ def err_arc_multiple_method_decl : Error<
++   "multiple methods named %0 found with mismatched result, "
++   "parameter type or attributes">;
++ def warn_arc_lifetime_result_type : Warning<
++   "ARC %select{unused|__unsafe_unretained|__strong|__weak|__autoreleasing}0 "
++   "lifetime qualifier on return type is ignored">,
++   InGroup<IgnoredQualifiers>;
++ 
++ let CategoryName = "ARC Retain Cycle" in {
++ 
++ def warn_arc_retain_cycle : Warning<
++   "capturing %0 strongly in this block is likely to lead to a retain cycle">,
++   InGroup<ARCRetainCycles>;
++ def note_arc_retain_cycle_owner : Note<
++   "block will be retained by %select{the captured object|an object strongly "
++   "retained by the captured object}0">;
++ 
++ } // end "ARC Retain Cycle" category
++ 
++ def warn_arc_object_memaccess : Warning<
++   "%select{destination for|source of}0 this %1 call is a pointer to "
++   "ownership-qualified type %2">, InGroup<ARCNonPodMemAccess>;
++ 
++ let CategoryName = "ARC and @properties" in {
++ 
++ def err_arc_strong_property_ownership : Error<
++   "existing instance variable %1 for strong property %0 may not be "
++   "%select{|__unsafe_unretained||__weak}2">;
++ def err_arc_assign_property_ownership : Error<
++   "existing instance variable %1 for property %0 with %select{unsafe_unretained|assign}2 "
++   "attribute must be __unsafe_unretained">;
++ def err_arc_inconsistent_property_ownership : Error<
++   "%select{|unsafe_unretained|strong|weak}1 property %0 may not also be "
++   "declared %select{|__unsafe_unretained|__strong|__weak|__autoreleasing}2">;
++ 
++ } // end "ARC and @properties" category
++ 
++ def warn_block_capture_autoreleasing : Warning<
++   "block captures an autoreleasing out-parameter, which may result in "
++   "use-after-free bugs">,
++   InGroup<BlockCaptureAutoReleasing>;
++ def note_declare_parameter_strong : Note<
++   "declare the parameter __strong or capture a __block __strong variable to "
++   "keep values alive across autorelease pools">;
++ 
++ def err_arc_atomic_ownership : Error<
++   "cannot perform atomic operation on a pointer to type %0: type has "
++   "non-trivial ownership">;
++ 
++ let CategoryName = "ARC Casting Rules" in {
++ 
++ def err_arc_bridge_cast_incompatible : Error<
++   "incompatible types casting %0 to %1 with a %select{__bridge|"
++   "__bridge_transfer|__bridge_retained}2 cast">;
++ def err_arc_bridge_cast_wrong_kind : Error<
++   "cast of %select{Objective-C|block|C}0 pointer type %1 to "
++   "%select{Objective-C|block|C}2 pointer type %3 cannot use %select{__bridge|"
++   "__bridge_transfer|__bridge_retained}4">;
++ def err_arc_cast_requires_bridge : Error<
++   "%select{cast|implicit conversion}0 of %select{Objective-C|block|C}1 "
++   "pointer type %2 to %select{Objective-C|block|C}3 pointer type %4 "
++   "requires a bridged cast">;
++ def note_arc_bridge : Note<
++   "use __bridge to convert directly (no change in ownership)">;
++ def note_arc_cstyle_bridge : Note<
++   "use __bridge with C-style cast to convert directly (no change in ownership)">;
++ def note_arc_bridge_transfer : Note<
++   "use %select{__bridge_transfer|CFBridgingRelease call}1 to transfer "
++   "ownership of a +1 %0 into ARC">;
++ def note_arc_cstyle_bridge_transfer : Note<
++   "use __bridge_transfer with C-style cast to transfer "
++   "ownership of a +1 %0 into ARC">;
++ def note_arc_bridge_retained : Note<
++   "use %select{__bridge_retained|CFBridgingRetain call}1 to make an "
++   "ARC object available as a +1 %0">;
++ def note_arc_cstyle_bridge_retained : Note<
++   "use __bridge_retained with C-style cast to make an "
++   "ARC object available as a +1 %0">;
++ 
++ } // ARC Casting category
++ 
++ } // ARC category name
++ 
++ def err_flexible_array_init_needs_braces : Error<
++   "flexible array requires brace-enclosed initializer">;
++ def err_illegal_decl_array_of_functions : Error<
++   "'%0' declared as array of functions of type %1">;
++ def err_array_incomplete_or_sizeless_type : Error<
++   "array has %select{incomplete|sizeless}0 element type %1">;
++ def err_illegal_message_expr_incomplete_type : Error<
++   "Objective-C message has incomplete result type %0">;
++ def err_illegal_decl_array_of_references : Error<
++   "'%0' declared as array of references of type %1">;
++ def err_decl_negative_array_size : Error<
++   "'%0' declared as an array with a negative size">;
++ def err_array_static_outside_prototype : Error<
++   "%0 used in array declarator outside of function prototype">;
++ def err_array_static_not_outermost : Error<
++   "%0 used in non-outermost array type derivation">;
++ def err_array_star_outside_prototype : Error<
++   "star modifier used outside of function prototype">;
++ def err_illegal_decl_pointer_to_reference : Error<
++   "'%0' declared as a pointer to a reference of type %1">;
++ def err_illegal_decl_mempointer_to_reference : Error<
++   "'%0' declared as a member pointer to a reference of type %1">;
++ def err_illegal_decl_mempointer_to_void : Error<
++   "'%0' declared as a member pointer to void">;
++ def err_illegal_decl_mempointer_in_nonclass : Error<
++   "'%0' does not point into a class">;
++ def err_mempointer_in_nonclass_type : Error<
++   "member pointer refers into non-class type %0">;
++ def err_reference_to_void : Error<"cannot form a reference to 'void'">;
++ def err_nonfunction_block_type : Error<
++   "block pointer to non-function type is invalid">;
++ def err_return_block_has_expr : Error<"void block should not return a value">;
++ def err_block_return_missing_expr : Error<
++   "non-void block should return a value">;
++ def err_func_def_incomplete_result : Error<
++   "incomplete result type %0 in function definition">;
++ def err_atomic_specifier_bad_type
++     : Error<"_Atomic cannot be applied to "
++             "%select{incomplete |array |function |reference |atomic |qualified "
++             "|sizeless ||integer }0type "
++             "%1 %select{|||||||which is not trivially copyable|}0">;
++ 
++ // Expressions.
++ def ext_sizeof_alignof_function_type : Extension<
++   "invalid application of '%0' to a function type">, InGroup<PointerArith>;
++ def ext_sizeof_alignof_void_type : Extension<
++   "invalid application of '%0' to a void type">, InGroup<PointerArith>;
++ def err_opencl_sizeof_alignof_type : Error<
++   "invalid application of '%0' to a void type">;
++ def err_sizeof_alignof_incomplete_or_sizeless_type : Error<
++   "invalid application of '%0' to %select{an incomplete|sizeless}1 type %2">;
++ def err_sizeof_alignof_function_type : Error<
++   "invalid application of '%0' to a function type">;
++ def err_openmp_default_simd_align_expr : Error<
++   "invalid application of '__builtin_omp_required_simd_align' to an expression, only type is allowed">;
++ def err_sizeof_alignof_typeof_bitfield : Error<
++   "invalid application of '%select{sizeof|alignof|typeof}0' to bit-field">;
++ def err_alignof_member_of_incomplete_type : Error<
++   "invalid application of 'alignof' to a field of a class still being defined">;
++ def err_vecstep_non_scalar_vector_type : Error<
++   "'vec_step' requires built-in scalar or vector type, %0 invalid">;
++ def err_offsetof_incomplete_type : Error<
++   "offsetof of incomplete type %0">;
++ def err_offsetof_record_type : Error<
++   "offsetof requires struct, union, or class type, %0 invalid">;
++ def err_offsetof_array_type : Error<"offsetof requires array type, %0 invalid">;
++ def ext_offsetof_non_pod_type : ExtWarn<"offset of on non-POD type %0">,
++   InGroup<InvalidOffsetof>;
++ def ext_offsetof_non_standardlayout_type : ExtWarn<
++   "offset of on non-standard-layout type %0">, InGroup<InvalidOffsetof>;
++ def err_offsetof_bitfield : Error<"cannot compute offset of bit-field %0">;
++ def err_offsetof_field_of_virtual_base : Error<
++   "invalid application of 'offsetof' to a field of a virtual base">;
++ def warn_sub_ptr_zero_size_types : Warning<
++   "subtraction of pointers to type %0 of zero size has undefined behavior">,
++   InGroup<PointerArith>;
++ def warn_pointer_arith_null_ptr : Warning<
++   "performing pointer arithmetic on a null pointer has undefined behavior%select{| if the offset is nonzero}0">,
++   InGroup<NullPointerArithmetic>, DefaultIgnore;
++ def warn_gnu_null_ptr_arith : Warning<
++   "arithmetic on a null pointer treated as a cast from integer to pointer is a GNU extension">,
++   InGroup<NullPointerArithmetic>, DefaultIgnore;
++ def warn_pointer_sub_null_ptr : Warning<
++   "performing pointer subtraction with a null pointer %select{has|may have}0 undefined behavior">,
++   InGroup<NullPointerSubtraction>, DefaultIgnore;
++ def err_kernel_invalidates_sycl_unique_stable_name
++     : Error<"kernel instantiation changes the result of an evaluated "
++             "'__builtin_sycl_unique_stable_name'">;
++ def note_sycl_unique_stable_name_evaluated_here
++     : Note<"'__builtin_sycl_unique_stable_name' evaluated here">;
++ 
++ def warn_floatingpoint_eq : Warning<
++   "comparing floating point with == or != is unsafe">,
++   InGroup<DiagGroup<"float-equal">>, DefaultIgnore;
++ 
++ def warn_remainder_division_by_zero : Warning<
++   "%select{remainder|division}0 by zero is undefined">,
++   InGroup<DivZero>;
++ def warn_shift_lhs_negative : Warning<"shifting a negative signed value is undefined">,
++   InGroup<DiagGroup<"shift-negative-value">>;
++ def warn_shift_negative : Warning<"shift count is negative">,
++   InGroup<DiagGroup<"shift-count-negative">>;
++ def warn_shift_gt_typewidth : Warning<"shift count >= width of type">,
++   InGroup<DiagGroup<"shift-count-overflow">>;
++ def warn_shift_result_gt_typewidth : Warning<
++   "signed shift result (%0) requires %1 bits to represent, but %2 only has "
++   "%3 bits">, InGroup<DiagGroup<"shift-overflow">>;
++ def warn_shift_result_sets_sign_bit : Warning<
++   "signed shift result (%0) sets the sign bit of the shift expression's "
++   "type (%1) and becomes negative">,
++   InGroup<DiagGroup<"shift-sign-overflow">>, DefaultIgnore;
++ 
++ def warn_precedence_bitwise_rel : Warning<
++   "%0 has lower precedence than %1; %1 will be evaluated first">,
++   InGroup<Parentheses>;
++ def note_precedence_bitwise_first : Note<
++   "place parentheses around the %0 expression to evaluate it first">;
++ def note_precedence_silence : Note<
++   "place parentheses around the '%0' expression to silence this warning">;
++ 
++ def warn_precedence_conditional : Warning<
++   "operator '?:' has lower precedence than '%0'; '%0' will be evaluated first">,
++   InGroup<Parentheses>;
++ def warn_precedence_bitwise_conditional : Warning<
++   "operator '?:' has lower precedence than '%0'; '%0' will be evaluated first">,
++   InGroup<BitwiseConditionalParentheses>;
++ def note_precedence_conditional_first : Note<
++   "place parentheses around the '?:' expression to evaluate it first">;
++ 
++ def warn_enum_constant_in_bool_context : Warning<
++   "converting the enum constant to a boolean">,
++   InGroup<IntInBoolContext>, DefaultIgnore;
++ def warn_left_shift_in_bool_context : Warning<
++   "converting the result of '<<' to a boolean; did you mean '(%0) != 0'?">,
++   InGroup<IntInBoolContext>, DefaultIgnore;
++ def warn_logical_instead_of_bitwise : Warning<
++   "use of logical '%0' with constant operand">,
++   InGroup<DiagGroup<"constant-logical-operand">>;
++ def note_logical_instead_of_bitwise_change_operator : Note<
++   "use '%0' for a bitwise operation">;
++ def note_logical_instead_of_bitwise_remove_constant : Note<
++   "remove constant to silence this warning">;
++ 
++ def warn_bitwise_op_in_bitwise_op : Warning<
++   "'%0' within '%1'">, InGroup<BitwiseOpParentheses>, DefaultIgnore;
++ 
++ def warn_logical_and_in_logical_or : Warning<
++   "'&&' within '||'">, InGroup<LogicalOpParentheses>, DefaultIgnore;
++ 
++ def warn_overloaded_shift_in_comparison :Warning<
++   "overloaded operator %select{>>|<<}0 has higher precedence than "
++   "comparison operator">,
++   InGroup<OverloadedShiftOpParentheses>;
++ def note_evaluate_comparison_first :Note<
++   "place parentheses around comparison expression to evaluate it first">;
++ 
++ def note_concatenated_string_literal_silence :Note<
++   "place parentheses around the string literal to silence warning">;
++ 
++ def warn_addition_in_bitshift : Warning<
++   "operator '%0' has lower precedence than '%1'; "
++   "'%1' will be evaluated first">, InGroup<ShiftOpParentheses>;
++ 
++ def warn_self_assignment_builtin : Warning<
++   "explicitly assigning value of variable of type %0 to itself">,
++   InGroup<SelfAssignment>, DefaultIgnore;
++ def warn_self_assignment_overloaded : Warning<
++   "explicitly assigning value of variable of type %0 to itself">,
++   InGroup<SelfAssignmentOverloaded>, DefaultIgnore;
++ def warn_self_move : Warning<
++   "explicitly moving variable of type %0 to itself">,
++   InGroup<SelfMove>, DefaultIgnore;
++ 
++ def warn_redundant_move_on_return : Warning<
++   "redundant move in return statement">,
++   InGroup<RedundantMove>, DefaultIgnore;
++ def warn_pessimizing_move_on_return : Warning<
++   "moving a local object in a return statement prevents copy elision">,
++   InGroup<PessimizingMove>, DefaultIgnore;
++ def warn_pessimizing_move_on_initialization : Warning<
++   "moving a temporary object prevents copy elision">,
++   InGroup<PessimizingMove>, DefaultIgnore;
++ def note_remove_move : Note<"remove std::move call here">;
++ 
++ def warn_string_plus_int : Warning<
++   "adding %0 to a string does not append to the string">,
++   InGroup<StringPlusInt>;
++ def warn_string_plus_char : Warning<
++   "adding %0 to a string pointer does not append to the string">,
++   InGroup<StringPlusChar>;
++ def note_string_plus_scalar_silence : Note<
++   "use array indexing to silence this warning">;
++ 
++ def warn_sizeof_array_param : Warning<
++   "sizeof on array function parameter will return size of %0 instead of %1">,
++   InGroup<SizeofArrayArgument>;
++ 
++ def warn_sizeof_array_decay : Warning<
++   "sizeof on pointer operation will return size of %0 instead of %1">,
++   InGroup<SizeofArrayDecay>;
++ 
++ def err_sizeof_nonfragile_interface : Error<
++   "application of '%select{alignof|sizeof}1' to interface %0 is "
++   "not supported on this architecture and platform">;
++ def err_atdef_nonfragile_interface : Error<
++   "use of @defs is not supported on this architecture and platform">;
++ def err_subscript_nonfragile_interface : Error<
++   "subscript requires size of interface %0, which is not constant for "
++   "this architecture and platform">;
++ 
++ def err_arithmetic_nonfragile_interface : Error<
++   "arithmetic on pointer to interface %0, which is not a constant size for "
++   "this architecture and platform">;
++ 
++ def warn_deprecated_comma_subscript : Warning<
++   "top-level comma expression in array subscript is deprecated">,
++   InGroup<DeprecatedCommaSubscript>;
++ 
++ def ext_subscript_non_lvalue : Extension<
++   "ISO C90 does not allow subscripting non-lvalue array">;
++ def err_typecheck_subscript_value : Error<
++   "subscripted value is not an array, pointer, or vector">;
++ def err_typecheck_subscript_not_integer : Error<
++   "array subscript is not an integer">;
++ def err_subscript_function_type : Error<
++   "subscript of pointer to function type %0">;
++ def err_subscript_incomplete_or_sizeless_type : Error<
++   "subscript of pointer to %select{incomplete|sizeless}0 type %1">;
++ def err_dereference_incomplete_type : Error<
++   "dereference of pointer to incomplete type %0">;
++ def ext_gnu_subscript_void_type : Extension<
++   "subscript of a pointer to void is a GNU extension">, InGroup<PointerArith>;
++ def err_typecheck_member_reference_struct_union : Error<
++   "member reference base type %0 is not a structure or union">;
++ def err_typecheck_member_reference_ivar : Error<
++   "%0 does not have a member named %1">;
++ def err_arc_weak_ivar_access : Error<
++   "dereferencing a __weak pointer is not allowed due to possible "
++   "null value caused by race condition, assign it to strong variable first">;
++ def err_typecheck_member_reference_arrow : Error<
++   "member reference type %0 is not a pointer">;
++ def err_typecheck_member_reference_suggestion : Error<
++   "member reference type %0 is %select{a|not a}1 pointer; did you mean to use '%select{->|.}1'?">;
++ def note_typecheck_member_reference_suggestion : Note<
++   "did you mean to use '.' instead?">;
++ def note_member_reference_arrow_from_operator_arrow : Note<
++   "'->' applied to return value of the operator->() declared here">;
++ def err_typecheck_member_reference_type : Error<
++   "cannot refer to type member %0 in %1 with '%select{.|->}2'">;
++ def err_typecheck_member_reference_unknown : Error<
++   "cannot refer to member %0 in %1 with '%select{.|->}2'">;
++ def err_member_reference_needs_call : Error<
++   "base of member reference is a function; perhaps you meant to call "
++   "it%select{| with no arguments}0?">;
++ def warn_subscript_is_char : Warning<"array subscript is of type 'char'">,
++   InGroup<CharSubscript>, DefaultIgnore;
++ 
++ def err_typecheck_incomplete_tag : Error<"incomplete definition of type %0">;
++ def err_no_member : Error<"no member named %0 in %1">;
++ def err_no_member_overloaded_arrow : Error<
++   "no member named %0 in %1; did you mean to use '->' instead of '.'?">;
++ 
++ def err_member_not_yet_instantiated : Error<
++   "no member %0 in %1; it has not yet been instantiated">;
++ def note_non_instantiated_member_here : Note<
++   "not-yet-instantiated member is declared here">;
++ 
++ def err_enumerator_does_not_exist : Error<
++   "enumerator %0 does not exist in instantiation of %1">;
++ def note_enum_specialized_here : Note<
++   "enum %0 was explicitly specialized here">;
++ 
++ def err_specialization_not_primary_template : Error<
++   "cannot reference member of primary template because deduced class "
++   "template specialization %0 is %select{instantiated from a partial|"
++   "an explicit}1 specialization">;
++ 
++ def err_member_redeclared : Error<"class member cannot be redeclared">;
++ def ext_member_redeclared : ExtWarn<"class member cannot be redeclared">,
++   InGroup<RedeclaredClassMember>;
++ def err_member_redeclared_in_instantiation : Error<
++   "multiple overloads of %0 instantiate to the same signature %1">;
++ def err_member_name_of_class : Error<"member %0 has the same name as its class">;
++ def err_member_def_undefined_record : Error<
++   "out-of-line definition of %0 from class %1 without definition">;
++ def err_member_decl_does_not_match : Error<
++   "out-of-line %select{declaration|definition}2 of %0 "
++   "does not match any declaration in %1">;
++ def err_friend_decl_with_def_arg_must_be_def : Error<
++   "friend declaration specifying a default argument must be a definition">;
++ def err_friend_decl_with_def_arg_redeclared : Error<
++   "friend declaration specifying a default argument must be the only declaration">;
++ def err_friend_decl_does_not_match : Error<
++   "friend declaration of %0 does not match any declaration in %1">;
++ def err_member_decl_does_not_match_suggest : Error<
++   "out-of-line %select{declaration|definition}2 of %0 "
++   "does not match any declaration in %1; did you mean %3?">;
++ def err_member_def_does_not_match_ret_type : Error<
++   "return type of out-of-line definition of %q0 differs from "
++   "that in the declaration">;
++ def err_nonstatic_member_out_of_line : Error<
++   "non-static data member defined out-of-line">;
++ def err_qualified_typedef_declarator : Error<
++   "typedef declarator cannot be qualified">;
++ def err_qualified_param_declarator : Error<
++   "parameter declarator cannot be qualified">;
++ def ext_out_of_line_declaration : ExtWarn<
++   "out-of-line declaration of a member must be a definition">,
++   InGroup<OutOfLineDeclaration>, DefaultError;
++ def err_member_extra_qualification : Error<
++   "extra qualification on member %0">;
++ def warn_member_extra_qualification : Warning<
++   err_member_extra_qualification.Text>, InGroup<MicrosoftExtraQualification>;
++ def warn_namespace_member_extra_qualification : Warning<
++   "extra qualification on member %0">,
++   InGroup<DiagGroup<"extra-qualification">>;
++ def err_member_qualification : Error<
++   "non-friend class member %0 cannot have a qualified name">;
++ def note_member_def_close_match : Note<"member declaration nearly matches">;
++ def note_member_def_close_const_match : Note<
++   "member declaration does not match because "
++   "it %select{is|is not}0 const qualified">;
++ def note_member_def_close_param_match : Note<
++   "type of %ordinal0 parameter of member declaration does not match definition"
++   "%diff{ ($ vs $)|}1,2">;
++ def note_local_decl_close_match : Note<"local declaration nearly matches">;
++ def note_local_decl_close_param_match : Note<
++   "type of %ordinal0 parameter of local declaration does not match definition"
++   "%diff{ ($ vs $)|}1,2">;
++ def err_typecheck_ivar_variable_size : Error<
++   "instance variables must have a constant size">;
++ def err_ivar_reference_type : Error<
++   "instance variables cannot be of reference type">;
++ def err_typecheck_illegal_increment_decrement : Error<
++   "cannot %select{decrement|increment}1 value of type %0">;
++ def err_typecheck_expect_int : Error<
++   "used type %0 where integer is required">;
++ def err_typecheck_arithmetic_incomplete_or_sizeless_type : Error<
++   "arithmetic on a pointer to %select{an incomplete|sizeless}0 type %1">;
++ def err_typecheck_pointer_arith_function_type : Error<
++   "arithmetic on%select{ a|}0 pointer%select{|s}0 to%select{ the|}2 "
++   "function type%select{|s}2 %1%select{| and %3}2">;
++ def err_typecheck_pointer_arith_void_type : Error<
++   "arithmetic on%select{ a|}0 pointer%select{|s}0 to void">;
++ def err_typecheck_decl_incomplete_type : Error<
++   "variable has incomplete type %0">;
++ def ext_typecheck_decl_incomplete_type : ExtWarn<
++   "tentative definition of variable with internal linkage has incomplete non-array type %0">,
++   InGroup<DiagGroup<"tentative-definition-incomplete-type">>;
++ def err_tentative_def_incomplete_type : Error<
++   "tentative definition has type %0 that is never completed">;
++ def warn_tentative_incomplete_array : Warning<
++   "tentative array definition assumed to have one element">;
++ def err_typecheck_incomplete_array_needs_initializer : Error<
++   "definition of variable with array type needs an explicit size "
++   "or an initializer">;
++ def err_array_init_not_init_list : Error<
++   "array initializer must be an initializer "
++   "list%select{| or string literal| or wide string literal}0">;
++ def err_array_init_narrow_string_into_wchar : Error<
++   "initializing wide char array with non-wide string literal">;
++ def err_array_init_wide_string_into_char : Error<
++   "initializing char array with wide string literal">;
++ def err_array_init_incompat_wide_string_into_wchar : Error<
++   "initializing wide char array with incompatible wide string literal">;
++ def err_array_init_plain_string_into_char8_t : Error<
++   "initializing 'char8_t' array with plain string literal">;
++ def note_array_init_plain_string_into_char8_t : Note<
++   "add 'u8' prefix to form a 'char8_t' string literal">;
++ def err_array_init_utf8_string_into_char : Error<
++   "%select{|ISO C++20 does not permit }0initialization of char array with "
++   "UTF-8 string literal%select{ is not permitted by '-fchar8_t'|}0">;
++ def warn_cxx20_compat_utf8_string : Warning<
++   "type of UTF-8 string literal will change from array of const char to "
++   "array of const char8_t in C++20">, InGroup<CXX20Compat>, DefaultIgnore;
++ def note_cxx20_compat_utf8_string_remove_u8 : Note<
++   "remove 'u8' prefix to avoid a change of behavior; "
++   "Clang encodes unprefixed narrow string literals as UTF-8">;
++ def err_array_init_different_type : Error<
++   "cannot initialize array %diff{of type $ with array of type $|"
++   "with different type of array}0,1">;
++ def err_array_init_non_constant_array : Error<
++   "cannot initialize array %diff{of type $ with non-constant array of type $|"
++   "with different type of array}0,1">;
++ def ext_array_init_copy : Extension<
++   "initialization of an array "
++   "%diff{of type $ from a compound literal of type $|"
++   "from a compound literal}0,1 is a GNU extension">, InGroup<GNUCompoundLiteralInitializer>;
++ // This is intentionally not disabled by -Wno-gnu.
++ def ext_array_init_parens : ExtWarn<
++   "parenthesized initialization of a member array is a GNU extension">,
++   InGroup<DiagGroup<"gnu-array-member-paren-init">>, DefaultError;
++ def warn_deprecated_string_literal_conversion : Warning<
++   "conversion from string literal to %0 is deprecated">,
++   InGroup<CXX11CompatDeprecatedWritableStr>;
++ def ext_deprecated_string_literal_conversion : ExtWarn<
++   "ISO C++11 does not allow conversion from string literal to %0">,
++   InGroup<WritableStrings>, SFINAEFailure;
++ def err_realimag_invalid_type : Error<"invalid type %0 to %1 operator">;
++ def err_typecheck_sclass_fscope : Error<
++   "illegal storage class on file-scoped variable">;
++ def warn_standalone_specifier : Warning<"'%0' ignored on this declaration">,
++   InGroup<MissingDeclarations>;
++ def ext_standalone_specifier : ExtWarn<"'%0' is not permitted on a declaration "
++   "of a type">, InGroup<MissingDeclarations>;
++ def err_standalone_class_nested_name_specifier : Error<
++   "forward declaration of %select{class|struct|interface|union|enum}0 cannot "
++   "have a nested name specifier">;
++ def err_typecheck_sclass_func : Error<"illegal storage class on function">;
++ def err_static_block_func : Error<
++   "function declared in block scope cannot have 'static' storage class">;
++ def err_typecheck_address_of : Error<"address of %select{bit-field"
++   "|vector element|property expression|register variable|matrix element}0 requested">;
++ def ext_typecheck_addrof_void : Extension<
++   "ISO C forbids taking the address of an expression of type 'void'">;
++ def err_unqualified_pointer_member_function : Error<
++   "must explicitly qualify name of member function when taking its address">;
++ def err_invalid_form_pointer_member_function : Error<
++   "cannot create a non-constant pointer to member function">;
++ def err_address_of_function_with_pass_object_size_params: Error<
++   "cannot take address of function %0 because parameter %1 has "
++   "pass_object_size attribute">;
++ def err_parens_pointer_member_function : Error<
++   "cannot parenthesize the name of a method when forming a member pointer">;
++ def err_typecheck_invalid_lvalue_addrof_addrof_function : Error<
++   "extra '&' taking address of overloaded function">;
++ def err_typecheck_invalid_lvalue_addrof : Error<
++   "cannot take the address of an rvalue of type %0">;
++ def ext_typecheck_addrof_temporary : ExtWarn<
++   "taking the address of a temporary object of type %0">,
++   InGroup<AddressOfTemporary>, DefaultError;
++ def err_typecheck_addrof_temporary : Error<
++   "taking the address of a temporary object of type %0">;
++ def err_typecheck_addrof_dtor : Error<
++   "taking the address of a destructor">;
++ def err_typecheck_unary_expr : Error<
++   "invalid argument type %0 to unary expression">;
++ def err_typecheck_indirection_requires_pointer : Error<
++   "indirection requires pointer operand (%0 invalid)">;
++ def ext_typecheck_indirection_through_void_pointer : ExtWarn<
++   "ISO C++ does not allow indirection on operand of type %0">,
++   InGroup<DiagGroup<"void-ptr-dereference">>;
++ def warn_indirection_through_null : Warning<
++   "indirection of non-volatile null pointer will be deleted, not trap">,
++   InGroup<NullDereference>;
++ def warn_binding_null_to_reference : Warning<
++   "binding dereferenced null pointer to reference has undefined behavior">,
++   InGroup<NullDereference>;
++ def note_indirection_through_null : Note<
++   "consider using __builtin_trap() or qualifying pointer with 'volatile'">;
++ def warn_pointer_indirection_from_incompatible_type : Warning<
++   "dereference of type %1 that was reinterpret_cast from type %0 has undefined "
++   "behavior">,
++   InGroup<UndefinedReinterpretCast>, DefaultIgnore;
++ def warn_taking_address_of_packed_member : Warning<
++   "taking address of packed member %0 of class or structure %q1 may result in an unaligned pointer value">,
++   InGroup<DiagGroup<"address-of-packed-member">>;
++ def warn_param_mismatched_alignment : Warning<
++   "passing %0-byte aligned argument to %1-byte aligned parameter %2 of %3 may result in an unaligned pointer access">,
++   InGroup<DiagGroup<"align-mismatch">>;
++ 
++ def err_objc_object_assignment : Error<
++   "cannot assign to class object (%0 invalid)">;
++ def err_typecheck_invalid_operands : Error<
++   "invalid operands to binary expression (%0 and %1)">, Deferrable;
++ def note_typecheck_invalid_operands_converted : Note<
++   "%select{first|second}0 operand was implicitly converted to type %1">;
++ def err_typecheck_logical_vector_expr_gnu_cpp_restrict : Error<
++   "logical expression with vector %select{type %1 and non-vector type %2|types"
++   " %1 and %2}0 is only supported in C++">;
++ def err_typecheck_sub_ptr_compatible : Error<
++   "%diff{$ and $ are not pointers to compatible types|"
++   "pointers to incompatible types}0,1">;
++ def ext_typecheck_ordered_comparison_of_pointer_integer : ExtWarn<
++   "ordered comparison between pointer and integer (%0 and %1)">;
++ def ext_typecheck_ordered_comparison_of_pointer_and_zero : Extension<
++   "ordered comparison between pointer and zero (%0 and %1) is an extension">;
++ def err_typecheck_ordered_comparison_of_pointer_and_zero : Error<
++   "ordered comparison between pointer and zero (%0 and %1)">;
++ def err_typecheck_three_way_comparison_of_pointer_and_zero : Error<
++   "three-way comparison between pointer and zero">;
++ def ext_typecheck_compare_complete_incomplete_pointers : Extension<
++   "pointer comparisons before C11 "
++   "need to be between two complete or two incomplete types; "
++   "%0 is %select{|in}2complete and "
++   "%1 is %select{|in}3complete">,
++   InGroup<C11>;
++ def warn_typecheck_ordered_comparison_of_function_pointers : Warning<
++   "ordered comparison of function pointers (%0 and %1)">,
++   InGroup<OrderedCompareFunctionPointers>;
++ def ext_typecheck_ordered_comparison_of_function_pointers : ExtWarn<
++   "ordered comparison of function pointers (%0 and %1)">,
++   InGroup<OrderedCompareFunctionPointers>;
++ def err_typecheck_ordered_comparison_of_function_pointers : Error<
++   "ordered comparison of function pointers (%0 and %1)">;
++ def ext_typecheck_comparison_of_fptr_to_void : Extension<
++   "equality comparison between function pointer and void pointer (%0 and %1)">;
++ def err_typecheck_comparison_of_fptr_to_void : Error<
++   "equality comparison between function pointer and void pointer (%0 and %1)">;
++ def ext_typecheck_comparison_of_pointer_integer : ExtWarn<
++   "comparison between pointer and integer (%0 and %1)">,
++   InGroup<DiagGroup<"pointer-integer-compare">>;
++ def err_typecheck_comparison_of_pointer_integer : Error<
++   "comparison between pointer and integer (%0 and %1)">;
++ def ext_typecheck_comparison_of_distinct_pointers : ExtWarn<
++   "comparison of distinct pointer types%diff{ ($ and $)|}0,1">,
++   InGroup<CompareDistinctPointerType>;
++ def ext_typecheck_cond_incompatible_operands : ExtWarn<
++   "incompatible operand types (%0 and %1)">;
++ def err_cond_voidptr_arc : Error <
++   "operands to conditional of types%diff{ $ and $|}0,1 are incompatible "
++   "in ARC mode">;
++ def err_typecheck_comparison_of_distinct_pointers : Error<
++   "comparison of distinct pointer types%diff{ ($ and $)|}0,1">;
++ def err_typecheck_op_on_nonoverlapping_address_space_pointers : Error<
++   "%select{comparison between %diff{ ($ and $)|}0,1"
++   "|arithmetic operation with operands of type %diff{ ($ and $)|}0,1"
++   "|conditional operator with the second and third operands of type "
++   "%diff{ ($ and $)|}0,1}2"
++   " which are pointers to non-overlapping address spaces">;
++ 
++ def select_arith_conv_kind : TextSubstitution<
++   "%select{arithmetic between|bitwise operation between|comparison of|"
++   "conditional expression between|compound assignment of}0">;
++ def warn_arith_conv_enum_float : Warning<
++   "%sub{select_arith_conv_kind}0 "
++   "%select{floating-point|enumeration}1 type %2 "
++   "%plural{2:with|4:from|:and}0 "
++   "%select{enumeration|floating-point}1 type %3">,
++   InGroup<EnumFloatConversion>, DefaultIgnore;
++ def warn_arith_conv_enum_float_cxx20 : Warning<
++   "%sub{select_arith_conv_kind}0 "
++   "%select{floating-point|enumeration}1 type %2 "
++   "%plural{2:with|4:from|:and}0 "
++   "%select{enumeration|floating-point}1 type %3 is deprecated">,
++   InGroup<DeprecatedEnumFloatConversion>;
++ def warn_arith_conv_mixed_enum_types : Warning<
++   "%sub{select_arith_conv_kind}0 "
++   "different enumeration types%diff{ ($ and $)|}1,2">,
++   InGroup<EnumEnumConversion>, DefaultIgnore;
++ def warn_arith_conv_mixed_enum_types_cxx20 : Warning<
++   "%sub{select_arith_conv_kind}0 "
++   "different enumeration types%diff{ ($ and $)|}1,2 is deprecated">,
++   InGroup<DeprecatedEnumEnumConversion>;
++ def warn_arith_conv_mixed_anon_enum_types : Warning<
++   warn_arith_conv_mixed_enum_types.Text>,
++   InGroup<AnonEnumEnumConversion>, DefaultIgnore;
++ def warn_arith_conv_mixed_anon_enum_types_cxx20 : Warning<
++   warn_arith_conv_mixed_enum_types_cxx20.Text>,
++   InGroup<DeprecatedAnonEnumEnumConversion>;
++ def warn_conditional_mixed_enum_types : Warning<
++   warn_arith_conv_mixed_enum_types.Text>,
++   InGroup<EnumCompareConditional>, DefaultIgnore;
++ def warn_conditional_mixed_enum_types_cxx20 : Warning<
++   warn_arith_conv_mixed_enum_types_cxx20.Text>,
++   InGroup<DeprecatedEnumCompareConditional>;
++ def warn_comparison_mixed_enum_types : Warning<
++   warn_arith_conv_mixed_enum_types.Text>,
++   InGroup<EnumCompare>;
++ def warn_comparison_mixed_enum_types_cxx20 : Warning<
++   warn_arith_conv_mixed_enum_types_cxx20.Text>,
++   InGroup<DeprecatedEnumCompare>;
++ def warn_comparison_of_mixed_enum_types_switch : Warning<
++   "comparison of different enumeration types in switch statement"
++   "%diff{ ($ and $)|}0,1">,
++   InGroup<EnumCompareSwitch>;
++ 
++ def err_typecheck_assign_const : Error<
++   "%select{"
++   "cannot assign to return value because function %1 returns a const value|"
++   "cannot assign to variable %1 with const-qualified type %2|"
++   "cannot assign to %select{non-|}1static data member %2 "
++   "with const-qualified type %3|"
++   "cannot assign to non-static data member within const member function %1|"
++   "cannot assign to %select{variable %2|non-static data member %2|lvalue}1 "
++   "with %select{|nested }3const-qualified data member %4|"
++   "read-only variable is not assignable}0">;
++ 
++ def note_typecheck_assign_const : Note<
++   "%select{"
++   "function %1 which returns const-qualified type %2 declared here|"
++   "variable %1 declared const here|"
++   "%select{non-|}1static data member %2 declared const here|"
++   "member function %q1 is declared const here|"
++   "%select{|nested }1data member %2 declared const here}0">;
++ 
++ def warn_unsigned_always_true_comparison : Warning<
++   "result of comparison of %select{%3|unsigned expression}0 %2 "
++   "%select{unsigned expression|%3}0 is always %4">,
++   InGroup<TautologicalUnsignedZeroCompare>, DefaultIgnore;
++ def warn_unsigned_char_always_true_comparison : Warning<
++   "result of comparison of %select{%3|char expression}0 %2 "
++   "%select{char expression|%3}0 is always %4, since char is interpreted as "
++   "unsigned">, InGroup<TautologicalUnsignedCharZeroCompare>, DefaultIgnore;
++ def warn_unsigned_enum_always_true_comparison : Warning<
++   "result of comparison of %select{%3|unsigned enum expression}0 %2 "
++   "%select{unsigned enum expression|%3}0 is always %4">,
++   InGroup<TautologicalUnsignedEnumZeroCompare>, DefaultIgnore;
++ def warn_tautological_constant_compare : Warning<
++   "result of comparison %select{%3|%1}0 %2 "
++   "%select{%1|%3}0 is always %4">,
++   InGroup<TautologicalTypeLimitCompare>, DefaultIgnore;
++ def warn_tautological_compare_objc_bool : Warning<
++   "result of comparison of constant %0 with expression of type 'BOOL'"
++   " is always %1, as the only well defined values for 'BOOL' are YES and NO">,
++   InGroup<TautologicalObjCBoolCompare>;
++ def subst_int_range : TextSubstitution<"%0-bit %select{signed|unsigned}1 value">;
++ def warn_tautological_compare_value_range : Warning<
++   "result of comparison of "
++   "%select{%4|%sub{subst_int_range}1,2}0 %3 "
++   "%select{%sub{subst_int_range}1,2|%4}0 is always %5">,
++   InGroup<TautologicalValueRangeCompare>, DefaultIgnore;
++ 
++ def warn_mixed_sign_comparison : Warning<
++   "comparison of integers of different signs: %0 and %1">,
++   InGroup<SignCompare>, DefaultIgnore;
++ def warn_out_of_range_compare : Warning<
++   "result of comparison of %select{constant %0|true|false}1 with "
++   "%select{expression of type %2|boolean expression}3 is always %4">,
++   InGroup<TautologicalOutOfRangeCompare>;
++ def warn_tautological_bool_compare : Warning<warn_out_of_range_compare.Text>,
++   InGroup<TautologicalConstantCompare>;
++ def warn_integer_constants_in_conditional_always_true : Warning<
++   "converting the result of '?:' with integer constants to a boolean always "
++   "evaluates to 'true'">,
++   InGroup<TautologicalConstantCompare>;
++ def warn_left_shift_always : Warning<
++   "converting the result of '<<' to a boolean always evaluates "
++   "to %select{false|true}0">,
++   InGroup<TautologicalConstantCompare>;
++ def warn_null_in_arithmetic_operation : Warning<
++   "use of NULL in arithmetic operation">,
++   InGroup<NullArithmetic>;
++ def warn_null_in_comparison_operation : Warning<
++   "comparison between NULL and non-pointer "
++   "%select{(%1 and NULL)|(NULL and %1)}0">,
++   InGroup<NullArithmetic>;
++ def err_shift_rhs_only_vector : Error<
++   "requested shift is a vector of type %0 but the first operand is not a "
++   "vector (%1)">;
++ 
++ def warn_logical_not_on_lhs_of_check : Warning<
++   "logical not is only applied to the left hand side of this "
++   "%select{comparison|bitwise operator}0">,
++   InGroup<LogicalNotParentheses>;
++ def note_logical_not_fix : Note<
++   "add parentheses after the '!' to evaluate the "
++   "%select{comparison|bitwise operator}0 first">;
++ def note_logical_not_silence_with_parens : Note<
++   "add parentheses around left hand side expression to silence this warning">;
++ 
++ def err_invalid_this_use : Error<
++   "invalid use of 'this' outside of a non-static member function">;
++ def err_this_static_member_func : Error<
++   "'this' cannot be%select{| implicitly}0 used in a static member function "
++   "declaration">;
++ def err_invalid_member_use_in_static_method : Error<
++   "invalid use of member %0 in static member function">;
++ def err_invalid_qualified_function_type : Error<
++   "%select{non-member function|static member function|deduction guide}0 "
++   "%select{of type %2 |}1cannot have '%3' qualifier">;
++ def err_compound_qualified_function_type : Error<
++   "%select{block pointer|pointer|reference}0 to function type %select{%2 |}1"
++   "cannot have '%3' qualifier">;
++ def err_qualified_function_typeid : Error<
++   "type operand %0 of 'typeid' cannot have '%1' qualifier">;
++ 
++ def err_ref_qualifier_overload : Error<
++   "cannot overload a member function %select{without a ref-qualifier|with "
++   "ref-qualifier '&'|with ref-qualifier '&&'}0 with a member function %select{"
++   "without a ref-qualifier|with ref-qualifier '&'|with ref-qualifier '&&'}1">;
++ 
++ def err_invalid_non_static_member_use : Error<
++   "invalid use of non-static data member %0">;
++ def err_nested_non_static_member_use : Error<
++   "%select{call to non-static member function|use of non-static data member}0 "
++   "%2 of %1 from nested type %3">;
++ def warn_cxx98_compat_non_static_member_use : Warning<
++   "use of non-static data member %0 in an unevaluated context is "
++   "incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
++ def err_invalid_incomplete_type_use : Error<
++   "invalid use of incomplete type %0">;
++ def err_builtin_func_cast_more_than_one_arg : Error<
++   "function-style cast to a builtin type can only take one argument">;
++ def err_value_init_for_array_type : Error<
++   "array types cannot be value-initialized">;
++ def err_init_for_function_type : Error<
++   "cannot create object of function type %0">;
++ def warn_format_nonliteral_noargs : Warning<
++   "format string is not a string literal (potentially insecure)">,
++   InGroup<FormatSecurity>;
++ def warn_format_nonliteral : Warning<
++   "format string is not a string literal">,
++   InGroup<FormatNonLiteral>, DefaultIgnore;
++ 
++ def err_unexpected_interface : Error<
++   "unexpected interface name %0: expected expression">;
++ def err_ref_non_value : Error<"%0 does not refer to a value">;
++ def err_ref_vm_type : Error<
++   "cannot refer to declaration with a variably modified type inside block">;
++ def err_ref_flexarray_type : Error<
++   "cannot refer to declaration of structure variable with flexible array member "
++   "inside block">;
++ def err_ref_array_type : Error<
++   "cannot refer to declaration with an array type inside block">;
++ def err_property_not_found : Error<
++   "property %0 not found on object of type %1">;
++ def err_invalid_property_name : Error<
++   "%0 is not a valid property name (accessing an object of type %1)">;
++ def err_getter_not_found : Error<
++   "no getter method for read from property">;
++ def err_objc_subscript_method_not_found : Error<
++   "expected method to %select{read|write}1 %select{dictionary|array}2 element not "
++   "found on object of type %0">;
++ def err_objc_subscript_index_type : Error<
++   "method index parameter type %0 is not integral type">;
++ def err_objc_subscript_key_type : Error<
++   "method key parameter type %0 is not object type">;
++ def err_objc_subscript_dic_object_type : Error<
++   "method object parameter type %0 is not object type">;
++ def err_objc_subscript_object_type : Error<
++   "cannot assign to this %select{dictionary|array}1 because assigning method's "
++   "2nd parameter of type %0 is not an Objective-C pointer type">;
++ def err_objc_subscript_base_type : Error<
++   "%select{dictionary|array}1 subscript base type %0 is not an Objective-C object">;
++ def err_objc_multiple_subscript_type_conversion : Error<
++   "indexing expression is invalid because subscript type %0 has "
++   "multiple type conversion functions">;
++ def err_objc_subscript_type_conversion : Error<
++   "indexing expression is invalid because subscript type %0 is not an integral"
++   " or Objective-C pointer type">;
++ def err_objc_subscript_pointer : Error<
++   "indexing expression is invalid because subscript type %0 is not an"
++   " Objective-C pointer">;
++ def err_objc_indexing_method_result_type : Error<
++   "method for accessing %select{dictionary|array}1 element must have Objective-C"
++   " object return type instead of %0">;
++ def err_objc_index_incomplete_class_type : Error<
++   "Objective-C index expression has incomplete class type %0">;
++ def err_illegal_container_subscripting_op : Error<
++   "illegal operation on Objective-C container subscripting">;
++ def err_property_not_found_forward_class : Error<
++   "property %0 cannot be found in forward class object %1">;
++ def err_property_not_as_forward_class : Error<
++   "property %0 refers to an incomplete Objective-C class %1 "
++   "(with no @interface available)">;
++ def note_forward_class : Note<
++   "forward declaration of class here">;
++ def err_duplicate_property : Error<
++   "property has a previous declaration">;
++ def ext_gnu_void_ptr : Extension<
++   "arithmetic on%select{ a|}0 pointer%select{|s}0 to void is a GNU extension">,
++   InGroup<PointerArith>;
++ def ext_gnu_ptr_func_arith : Extension<
++   "arithmetic on%select{ a|}0 pointer%select{|s}0 to%select{ the|}2 function "
++   "type%select{|s}2 %1%select{| and %3}2 is a GNU extension">,
++   InGroup<PointerArith>;
++ def err_readonly_message_assignment : Error<
++   "assigning to 'readonly' return result of an Objective-C message not allowed">;
++ def ext_integer_increment_complex : Extension<
++   "ISO C does not support '++'/'--' on complex integer type %0">;
++ def ext_integer_complement_complex : Extension<
++   "ISO C does not support '~' for complex conjugation of %0">;
++ def err_nosetter_property_assignment : Error<
++   "%select{assignment to readonly property|"
++   "no setter method %1 for assignment to property}0">;
++ def err_nosetter_property_incdec : Error<
++   "%select{%select{increment|decrement}1 of readonly property|"
++   "no setter method %2 for %select{increment|decrement}1 of property}0">;
++ def err_nogetter_property_compound_assignment : Error<
++   "a getter method is needed to perform a compound assignment on a property">;
++ def err_nogetter_property_incdec : Error<
++   "no getter method %1 for %select{increment|decrement}0 of property">;
++ def err_no_subobject_property_setting : Error<
++   "expression is not assignable">;
++ def err_qualified_objc_access : Error<
++   "%select{property|instance variable}0 access cannot be qualified with '%1'">;
++ 
++ def ext_freestanding_complex : Extension<
++   "complex numbers are an extension in a freestanding C99 implementation">;
++ 
++ // FIXME: Remove when we support imaginary.
++ def err_imaginary_not_supported : Error<"imaginary types are not supported">;
++ 
++ // Obj-c expressions
++ def warn_root_inst_method_not_found : Warning<
++   "instance method %0 is being used on 'Class' which is not in the root class">,
++   InGroup<MethodAccess>;
++ def warn_class_method_not_found : Warning<
++   "class method %objcclass0 not found (return type defaults to 'id')">,
++   InGroup<MethodAccess>;
++ def warn_instance_method_on_class_found : Warning<
++   "instance method %0 found instead of class method %1">,
++   InGroup<MethodAccess>;
++ def warn_inst_method_not_found : Warning<
++   "instance method %objcinstance0 not found (return type defaults to 'id')">,
++   InGroup<MethodAccess>;
++ def warn_instance_method_not_found_with_typo : Warning<
++   "instance method %objcinstance0 not found (return type defaults to 'id')"
++   "; did you mean %objcinstance2?">, InGroup<MethodAccess>;
++ def warn_class_method_not_found_with_typo : Warning<
++   "class method %objcclass0 not found (return type defaults to 'id')"
++   "; did you mean %objcclass2?">, InGroup<MethodAccess>;
++ def err_method_not_found_with_typo : Error<
++   "%select{instance|class}1 method %0 not found "
++   "; did you mean %2?">;
++ def err_no_super_class_message : Error<
++   "no @interface declaration found in class messaging of %0">;
++ def err_root_class_cannot_use_super : Error<
++   "%0 cannot use 'super' because it is a root class">;
++ def err_invalid_receiver_to_message_super : Error<
++   "'super' is only valid in a method body">;
++ def err_invalid_receiver_class_message : Error<
++   "receiver type %0 is not an Objective-C class">;
++ def err_missing_open_square_message_send : Error<
++   "missing '[' at start of message send expression">;
++ def warn_bad_receiver_type : Warning<
++   "receiver type %0 is not 'id' or interface pointer, consider "
++   "casting it to 'id'">,InGroup<ObjCReceiver>;
++ def err_bad_receiver_type : Error<"bad receiver type %0">;
++ def err_incomplete_receiver_type : Error<"incomplete receiver type %0">;
++ def err_unknown_receiver_suggest : Error<
++   "unknown receiver %0; did you mean %1?">;
++ def err_objc_throw_expects_object : Error<
++   "@throw requires an Objective-C object type (%0 invalid)">;
++ def err_objc_synchronized_expects_object : Error<
++   "@synchronized requires an Objective-C object type (%0 invalid)">;
++ def err_rethrow_used_outside_catch : Error<
++   "@throw (rethrow) used outside of a @catch block">;
++ def err_attribute_multiple_objc_gc : Error<
++   "multiple garbage collection attributes specified for type">;
++ def err_catch_param_not_objc_type : Error<
++   "@catch parameter is not a pointer to an interface type">;
++ def err_illegal_qualifiers_on_catch_parm : Error<
++   "illegal qualifiers on @catch parameter">;
++ def err_storage_spec_on_catch_parm : Error<
++   "@catch parameter cannot have storage specifier '%0'">;
++ def warn_register_objc_catch_parm : Warning<
++   "'register' storage specifier on @catch parameter will be ignored">;
++ def err_qualified_objc_catch_parm : Error<
++   "@catch parameter declarator cannot be qualified">;
++ def warn_objc_pointer_cxx_catch_fragile : Warning<
++   "cannot catch an exception thrown with @throw in C++ in the non-unified "
++   "exception model">, InGroup<ObjCNonUnifiedException>;
++ def err_objc_object_catch : Error<
++   "cannot catch an Objective-C object by value">;
++ def err_incomplete_type_objc_at_encode : Error<
++   "'@encode' of incomplete type %0">;
++ def warn_objc_circular_container : Warning<
++   "adding %0 to %1 might cause circular dependency in container">,
++   InGroup<DiagGroup<"objc-circular-container">>;
++ def note_objc_circular_container_declared_here : Note<"%0 declared here">;
++ def warn_objc_unsafe_perform_selector : Warning<
++   "%0 is incompatible with selectors that return a "
++   "%select{struct|union|vector}1 type">,
++   InGroup<DiagGroup<"objc-unsafe-perform-selector">>;
++ def note_objc_unsafe_perform_selector_method_declared_here :  Note<
++   "method %0 that returns %1 declared here">;
++ def err_attribute_arm_builtin_alias : Error<
++   "'__clang_arm_builtin_alias' attribute can only be applied to an ARM builtin">;
++ def err_attribute_arm_mve_polymorphism : Error<
++   "'__clang_arm_mve_strict_polymorphism' attribute can only be applied to an MVE/NEON vector type">;
++ 
++ def warn_setter_getter_impl_required : Warning<
++   "property %0 requires method %1 to be defined - "
++   "use @synthesize, @dynamic or provide a method implementation "
++   "in this class implementation">,
++   InGroup<ObjCPropertyImpl>;
++ def warn_setter_getter_impl_required_in_category : Warning<
++   "property %0 requires method %1 to be defined - "
++   "use @dynamic or provide a method implementation in this category">,
++   InGroup<ObjCPropertyImpl>;
++ def note_parameter_named_here : Note<
++   "passing argument to parameter %0 here">;
++ def note_parameter_here : Note<
++   "passing argument to parameter here">;
++ def note_method_return_type_change : Note<
++   "compiler has implicitly changed method %0 return type">;
++ 
++ def warn_impl_required_for_class_property : Warning<
++   "class property %0 requires method %1 to be defined - "
++   "use @dynamic or provide a method implementation "
++   "in this class implementation">,
++   InGroup<ObjCPropertyImpl>;
++ def warn_impl_required_in_category_for_class_property : Warning<
++   "class property %0 requires method %1 to be defined - "
++   "use @dynamic or provide a method implementation in this category">,
++   InGroup<ObjCPropertyImpl>;
++ 
++ // C++ casts
++ // These messages adhere to the TryCast pattern: %0 is an int specifying the
++ // cast type, %1 is the source type, %2 is the destination type.
++ def err_bad_reinterpret_cast_overload : Error<
++   "reinterpret_cast cannot resolve overloaded function %0 to type %1">;
++ 
++ def warn_reinterpret_different_from_static : Warning<
++   "'reinterpret_cast' %select{from|to}3 class %0 %select{to|from}3 its "
++   "%select{virtual base|base at non-zero offset}2 %1 behaves differently from "
++   "'static_cast'">, InGroup<ReinterpretBaseClass>;
++ def note_reinterpret_updowncast_use_static: Note<
++   "use 'static_cast' to adjust the pointer correctly while "
++   "%select{upcasting|downcasting}0">;
++ 
++ def err_bad_static_cast_overload : Error<
++   "address of overloaded function %0 cannot be static_cast to type %1">;
++ 
++ def err_bad_cstyle_cast_overload : Error<
++   "address of overloaded function %0 cannot be cast to type %1">;
++ 
++ 
++ def err_bad_cxx_cast_generic : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|"
++   "C-style cast|functional-style cast|addrspace_cast}0 from %1 to %2 is not allowed">;
++ def err_bad_cxx_cast_unrelated_class : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|}0 from %1 to %2, which are not related by "
++   "inheritance, is not allowed">;
++ def note_type_incomplete : Note<"%0 is incomplete">;
++ def err_bad_cxx_cast_rvalue : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|addrspace_cast}0 from rvalue to reference type %2">;
++ def err_bad_cxx_cast_bitfield : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|}0 from bit-field lvalue to reference type %2">;
++ def err_bad_cxx_cast_qualifiers_away : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|}0 from %1 to %2 casts away qualifiers">;
++ def err_bad_cxx_cast_addr_space_mismatch : Error<
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|"
++   "C-style cast|functional-style cast|addrspace_cast}0 from %1 to %2 converts between mismatching address"
++   " spaces">;
++ def ext_bad_cxx_cast_qualifiers_away_incoherent : ExtWarn<
++   "ISO C++ does not allow "
++   "%select{const_cast|static_cast|reinterpret_cast|dynamic_cast|C-style cast|"
++   "functional-style cast|}0 from %1 to %2 because it casts away qualifiers, "
++   "even though the source and destination types are unrelated">,
++   SFINAEFailure, InGroup<DiagGroup<"cast-qual-unrelated">>;
++ def err_bad_const_cast_dest : Error<
++   "%select{const_cast||||C-style cast|functional-style cast|}0 to %2, "
++   "which is not a reference, pointer-to-object, or pointer-to-data-member">;
++ def ext_cast_fn_obj : Extension<
++   "cast between pointer-to-function and pointer-to-object is an extension">;
++ def ext_ms_cast_fn_obj : ExtWarn<
++   "static_cast between pointer-to-function and pointer-to-object is a "
++   "Microsoft extension">, InGroup<MicrosoftCast>;
++ def warn_cxx98_compat_cast_fn_obj : Warning<
++   "cast between pointer-to-function and pointer-to-object is incompatible with C++98">,
++   InGroup<CXX98CompatPedantic>, DefaultIgnore;
++ def err_bad_reinterpret_cast_small_int : Error<
++   "cast from pointer to smaller type %2 loses information">;
++ def err_bad_cxx_cast_vector_to_scalar_different_size : Error<
++   "%select{||reinterpret_cast||C-style cast||}0 from vector %1 "
++   "to scalar %2 of different size">;
++ def err_bad_cxx_cast_scalar_to_vector_different_size : Error<
++   "%select{||reinterpret_cast||C-style cast||}0 from scalar %1 "
++   "to vector %2 of different size">;
++ def err_bad_cxx_cast_vector_to_vector_different_size : Error<
++   "%select{||reinterpret_cast||C-style cast||}0 from vector %1 "
++   "to vector %2 of different size">;
++ def warn_bad_cxx_cast_nested_pointer_addr_space : Warning<
++   "%select{reinterpret_cast|C-style cast}0 from %1 to %2 "
++   "changes address space of nested pointers">,
++   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
++ def err_bad_lvalue_to_rvalue_cast : Error<
++   "cannot cast from lvalue of type %1 to rvalue reference type %2; types are "
++   "not compatible">;
++ def err_bad_rvalue_to_rvalue_cast : Error<
++   "cannot cast from rvalue of type %1 to rvalue reference type %2; types are "
++   "not compatible">;
++ def err_bad_static_cast_pointer_nonpointer : Error<
++   "cannot cast from type %1 to pointer type %2">;
++ def err_bad_static_cast_member_pointer_nonmp : Error<
++   "cannot cast from type %1 to member pointer type %2">;
++ def err_bad_cxx_cast_member_pointer_size : Error<
++   "cannot %select{||reinterpret_cast||C-style cast||}0 from member pointer "
++   "type %1 to member pointer type %2 of different size">;
++ def err_bad_reinterpret_cast_reference : Error<
++   "reinterpret_cast of a %0 to %1 needs its address, which is not allowed">;
++ def warn_undefined_reinterpret_cast : Warning<
++   "reinterpret_cast from %0 to %1 has undefined behavior">,
++   InGroup<UndefinedReinterpretCast>, DefaultIgnore;
++ 
++ // These messages don't adhere to the pattern.
++ // FIXME: Display the path somehow better.
++ def err_ambiguous_base_to_derived_cast : Error<
++   "ambiguous cast from base %0 to derived %1:%2">;
++ def err_static_downcast_via_virtual : Error<
++   "cannot cast %0 to %1 via virtual base %2">;
++ def err_downcast_from_inaccessible_base : Error<
++   "cannot cast %select{private|protected}2 base class %1 to %0">;
++ def err_upcast_to_inaccessible_base : Error<
++   "cannot cast %0 to its %select{private|protected}2 base class %1">;
++ def err_bad_dynamic_cast_not_ref_or_ptr : Error<
++   "invalid target type %0 for dynamic_cast; target type must be a reference or pointer type to a defined class">;
++ def err_bad_dynamic_cast_not_class : Error<"%0 is not a class type">;
++ def err_bad_cast_incomplete : Error<"%0 is an incomplete type">;
++ def err_bad_dynamic_cast_not_ptr : Error<"cannot use dynamic_cast to convert from %0 to %1">;
++ def err_bad_dynamic_cast_not_polymorphic : Error<"%0 is not polymorphic">;
++ 
++ // Other C++ expressions
++ def err_need_header_before_typeid : Error<
++   "you need to include <typeinfo> before using the 'typeid' operator">;
++ def err_need_header_before_ms_uuidof : Error<
++   "you need to include <guiddef.h> before using the '__uuidof' operator">;
++ def err_need_header_before_placement_new : Error<
++   "no matching %0 function for non-allocating placement new expression; "
++   "include <new>">;
++ def err_ms___leave_not_in___try : Error<
++   "'__leave' statement not in __try block">;
++ def err_uuidof_without_guid : Error<
++   "cannot call operator __uuidof on a type with no GUID">;
++ def err_uuidof_with_multiple_guids : Error<
++   "cannot call operator __uuidof on a type with multiple GUIDs">;
++ def err_incomplete_typeid : Error<"'typeid' of incomplete type %0">;
++ def err_variably_modified_typeid : Error<"'typeid' of variably modified type %0">;
++ def err_static_illegal_in_new : Error<
++   "the 'static' modifier for the array size is not legal in new expressions">;
++ def err_array_new_needs_size : Error<
++   "array size must be specified in new expression with no initializer">;
++ def err_bad_new_type : Error<
++   "cannot allocate %select{function|reference}1 type %0 with new">;
++ def err_new_incomplete_or_sizeless_type : Error<
++   "allocation of %select{incomplete|sizeless}0 type %1">;
++ def err_new_array_nonconst : Error<
++   "only the first dimension of an allocated array may have dynamic size">;
++ def err_new_array_size_unknown_from_init : Error<
++   "cannot determine allocated array size from initializer">;
++ def err_new_array_init_args : Error<
++   "array 'new' cannot have initialization arguments">;
++ def ext_new_paren_array_nonconst : ExtWarn<
++   "when type is in parentheses, array cannot have dynamic size">;
++ def err_placement_new_non_placement_delete : Error<
++   "'new' expression with placement arguments refers to non-placement "
++   "'operator delete'">;
++ def err_array_size_not_integral : Error<
++   "array size expression must have integral or %select{|unscoped }0"
++   "enumeration type, not %1">;
++ def err_array_size_incomplete_type : Error<
++   "array size expression has incomplete class type %0">;
++ def err_array_size_explicit_conversion : Error<
++   "array size expression of type %0 requires explicit conversion to type %1">;
++ def note_array_size_conversion : Note<
++   "conversion to %select{integral|enumeration}0 type %1 declared here">;
++ def err_array_size_ambiguous_conversion : Error<
++   "ambiguous conversion of array size expression of type %0 to an integral or "
++   "enumeration type">;
++ def ext_array_size_conversion : Extension<
++   "implicit conversion from array size expression of type %0 to "
++   "%select{integral|enumeration}1 type %2 is a C++11 extension">,
++   InGroup<CXX11>;
++ def warn_cxx98_compat_array_size_conversion : Warning<
++   "implicit conversion from array size expression of type %0 to "
++   "%select{integral|enumeration}1 type %2 is incompatible with C++98">,
++   InGroup<CXX98CompatPedantic>, DefaultIgnore;
++ def err_address_space_qualified_new : Error<
++   "'new' cannot allocate objects of type %0 in address space '%1'">;
++ def err_address_space_qualified_delete : Error<
++   "'delete' cannot delete objects of type %0 in address space '%1'">;
++ 
++ def err_default_init_const : Error<
++   "default initialization of an object of const type %0"
++   "%select{| without a user-provided default constructor}1">;
++ def ext_default_init_const : ExtWarn<
++   "default initialization of an object of const type %0"
++   "%select{| without a user-provided default constructor}1 "
++   "is a Microsoft extension">,
++   InGroup<MicrosoftConstInit>;
++ def err_delete_operand : Error<"cannot delete expression of type %0">;
++ def ext_delete_void_ptr_operand : ExtWarn<
++   "cannot delete expression with pointer-to-'void' type %0">,
++   InGroup<DeleteIncomplete>;
++ def err_ambiguous_delete_operand : Error<
++   "ambiguous conversion of delete expression of type %0 to a pointer">;
++ def warn_delete_incomplete : Warning<
++   "deleting pointer to incomplete type %0 may cause undefined behavior">,
++   InGroup<DeleteIncomplete>;
++ def err_delete_incomplete_class_type : Error<
++   "deleting incomplete class type %0; no conversions to pointer type">;
++ def err_delete_explicit_conversion : Error<
++   "converting delete expression from type %0 to type %1 invokes an explicit "
++   "conversion function">;
++ def note_delete_conversion : Note<"conversion to pointer type %0">;
++ def warn_delete_array_type : Warning<
++   "'delete' applied to a pointer-to-array type %0 treated as 'delete[]'">;
++ def warn_mismatched_delete_new : Warning<
++   "'delete%select{|[]}0' applied to a pointer that was allocated with "
++   "'new%select{[]|}0'; did you mean 'delete%select{[]|}0'?">,
++   InGroup<DiagGroup<"mismatched-new-delete">>;
++ def note_allocated_here : Note<"allocated with 'new%select{[]|}0' here">;
++ def err_no_suitable_delete_member_function_found : Error<
++   "no suitable member %0 in %1">;
++ def err_ambiguous_suitable_delete_member_function_found : Error<
++   "multiple suitable %0 functions in %1">;
++ def warn_ambiguous_suitable_delete_function_found : Warning<
++   "multiple suitable %0 functions for %1; no 'operator delete' function "
++   "will be invoked if initialization throws an exception">,
++   InGroup<DiagGroup<"ambiguous-delete">>;
++ def note_member_declared_here : Note<
++   "member %0 declared here">;
++ def note_member_first_declared_here : Note<
++   "member %0 first declared here">;
+++def warn_bitwise_instead_of_logical : Warning<
+++  "use of bitwise '%0' with boolean operands">,
+++  InGroup<BitwiseInsteadOfLogical>, DefaultIgnore;
++ def warn_bitwise_negation_bool : Warning<
++   "bitwise negation of a boolean expression%select{;| always evaluates to 'true';}0 "
++   "did you mean logical negation?">,
++   InGroup<BoolOperation>, DefaultIgnore;
++ def err_decrement_bool : Error<"cannot decrement expression of type bool">;
++ def warn_increment_bool : Warning<
++   "incrementing expression of type bool is deprecated and "
++   "incompatible with C++17">, InGroup<DeprecatedIncrementBool>;
++ def ext_increment_bool : ExtWarn<
++   "ISO C++17 does not allow incrementing expression of type bool">,
++   DefaultError, InGroup<IncrementBool>;
++ def err_increment_decrement_enum : Error<
++   "cannot %select{decrement|increment}0 expression of enum type %1">;
++ 
++ def warn_deprecated_increment_decrement_volatile : Warning<
++   "%select{decrement|increment}0 of object of volatile-qualified type %1 "
++   "is deprecated">, InGroup<DeprecatedVolatile>;
++ def warn_deprecated_simple_assign_volatile : Warning<
++   "use of result of assignment to object of volatile-qualified type %0 "
++   "is deprecated">, InGroup<DeprecatedVolatile>;
++ def warn_deprecated_compound_assign_volatile : Warning<
++   "compound assignment to object of volatile-qualified type %0 is deprecated">,
++   InGroup<DeprecatedVolatile>;
++ def warn_deprecated_volatile_return : Warning<
++   "volatile-qualified return type %0 is deprecated">,
++   InGroup<DeprecatedVolatile>;
++ def warn_deprecated_volatile_param : Warning<
++   "volatile-qualified parameter type %0 is deprecated">,
++   InGroup<DeprecatedVolatile>;
++ def warn_deprecated_volatile_structured_binding : Warning<
++   "volatile qualifier in structured binding declaration is deprecated">,
++   InGroup<DeprecatedVolatile>;
++ 
++ def warn_deprecated_altivec_src_compat : Warning<
++   "Current handling of vector bool and vector pixel types in this context are "
++   "deprecated. The default behaviour will soon change to that implied by the "
++   "'-altivec-compat=xl' option">,
++   InGroup<DiagGroup<"deprecated-altivec-src-compat">>;
++ 
++ def err_catch_incomplete_ptr : Error<
++   "cannot catch pointer to incomplete type %0">;
++ def err_catch_incomplete_ref : Error<
++   "cannot catch reference to incomplete type %0">;
++ def err_catch_incomplete : Error<"cannot catch incomplete type %0">;
++ def err_catch_sizeless : Error<
++   "cannot catch %select{|reference to }0sizeless type %1">;
++ def err_catch_rvalue_ref : Error<"cannot catch exceptions by rvalue reference">;
++ def err_catch_variably_modified : Error<
++   "cannot catch variably modified type %0">;
++ def err_qualified_catch_declarator : Error<
++   "exception declarator cannot be qualified">;
++ def err_early_catch_all : Error<"catch-all handler must come last">;
++ def err_bad_memptr_rhs : Error<
++   "right hand operand to %0 has non-pointer-to-member type %1">;
++ def err_bad_memptr_lhs : Error<
++   "left hand operand to %0 must be a %select{|pointer to }1class "
++   "compatible with the right hand operand, but is %2">;
++ def err_memptr_incomplete : Error<
++   "member pointer has incomplete base type %0">;
++ def warn_exception_caught_by_earlier_handler : Warning<
++   "exception of type %0 will be caught by earlier handler">,
++   InGroup<Exceptions>;
++ def note_previous_exception_handler : Note<"for type %0">;
++ def err_exceptions_disabled : Error<
++   "cannot use '%0' with exceptions disabled">;
++ def err_objc_exceptions_disabled : Error<
++   "cannot use '%0' with Objective-C exceptions disabled">;
++ def warn_throw_in_noexcept_func : Warning<
++   "%0 has a non-throwing exception specification but can still throw">,
++   InGroup<Exceptions>;
++ def note_throw_in_dtor : Note<
++   "%select{destructor|deallocator}0 has a %select{non-throwing|implicit "
++   "non-throwing}1 exception specification">;
++ def note_throw_in_function : Note<"function declared non-throwing here">;
++ def err_seh_try_outside_functions : Error<
++   "cannot use SEH '__try' in blocks, captured regions, or Obj-C method decls">;
++ def err_mixing_cxx_try_seh_try : Error<
++   "cannot use C++ 'try' in the same function as SEH '__try'">;
++ def err_seh_try_unsupported : Error<
++   "SEH '__try' is not supported on this target">;
++ def note_conflicting_try_here : Note<
++   "conflicting %0 here">;
++ def warn_jump_out_of_seh_finally : Warning<
++   "jump out of __finally block has undefined behavior">,
++   InGroup<DiagGroup<"jump-seh-finally">>;
++ def warn_non_virtual_dtor : Warning<
++   "%0 has virtual functions but non-virtual destructor">,
++   InGroup<NonVirtualDtor>, DefaultIgnore;
++ def warn_delete_non_virtual_dtor : Warning<
++   "%select{delete|destructor}0 called on non-final %1 that has "
++   "virtual functions but non-virtual destructor">,
++   InGroup<DeleteNonAbstractNonVirtualDtor>, DefaultIgnore, ShowInSystemHeader;
++ def note_delete_non_virtual : Note<
++   "qualify call to silence this warning">;
++ def warn_delete_abstract_non_virtual_dtor : Warning<
++   "%select{delete|destructor}0 called on %1 that is abstract but has "
++   "non-virtual destructor">, InGroup<DeleteAbstractNonVirtualDtor>, ShowInSystemHeader;
++ def warn_overloaded_virtual : Warning<
++   "%q0 hides overloaded virtual %select{function|functions}1">,
++   InGroup<OverloadedVirtual>, DefaultIgnore;
++ def note_hidden_overloaded_virtual_declared_here : Note<
++   "hidden overloaded virtual function %q0 declared here"
++   "%select{|: different classes%diff{ ($ vs $)|}2,3"
++   "|: different number of parameters (%2 vs %3)"
++   "|: type mismatch at %ordinal2 parameter%diff{ ($ vs $)|}3,4"
++   "|: different return type%diff{ ($ vs $)|}2,3"
++   "|: different qualifiers (%2 vs %3)"
++   "|: different exception specifications}1">;
++ def warn_using_directive_in_header : Warning<
++   "using namespace directive in global context in header">,
++   InGroup<HeaderHygiene>, DefaultIgnore;
++ def warn_overaligned_type : Warning<
++   "type %0 requires %1 bytes of alignment and the default allocator only "
++   "guarantees %2 bytes">,
++   InGroup<OveralignedType>, DefaultIgnore;
++ def err_aligned_allocation_unavailable : Error<
++   "aligned %select{allocation|deallocation}0 function of type '%1' is "
++   "%select{only|not}4 available on %2%select{ %3 or newer|}4">;
++ def note_silence_aligned_allocation_unavailable : Note<
++   "if you supply your own aligned allocation functions, use "
++   "-faligned-allocation to silence this diagnostic">;
++ 
++ def err_conditional_void_nonvoid : Error<
++   "%select{left|right}1 operand to ? is void, but %select{right|left}1 operand "
++   "is of type %0">;
++ def err_conditional_ambiguous : Error<
++   "conditional expression is ambiguous; "
++   "%diff{$ can be converted to $ and vice versa|"
++   "types can be convert to each other}0,1">;
++ def err_conditional_ambiguous_ovl : Error<
++   "conditional expression is ambiguous; %diff{$ and $|types}0,1 "
++   "can be converted to several common types">;
++ def err_conditional_vector_size : Error<
++   "vector condition type %0 and result type %1 do not have the same number "
++   "of elements">;
++ def err_conditional_vector_element_size : Error<
++   "vector condition type %0 and result type %1 do not have elements of the "
++   "same size">;
++ def err_conditional_vector_has_void : Error<
++   "GNU vector conditional operand cannot be %select{void|a throw expression}0">;
++ def err_conditional_vector_operand_type
++     : Error<"enumeration type %0 is not allowed in a vector conditional">;
++ def err_conditional_vector_cond_result_mismatch
++     : Error<"cannot mix vectors and extended vectors in a vector conditional">;
++ def err_conditional_vector_mismatched
++     : Error<"vector operands to the vector conditional must be the same type "
++             "%diff{($ and $)|}0,1}">;
++ 
++ def err_throw_incomplete : Error<
++   "cannot throw object of incomplete type %0">;
++ def err_throw_incomplete_ptr : Error<
++   "cannot throw pointer to object of incomplete type %0">;
++ def err_throw_sizeless : Error<
++   "cannot throw object of sizeless type %0">;
++ def warn_throw_underaligned_obj : Warning<
++   "underaligned exception object thrown">,
++   InGroup<UnderalignedExceptionObject>;
++ def note_throw_underaligned_obj : Note<
++   "required alignment of type %0 (%1 bytes) is larger than the supported "
++   "alignment of C++ exception objects on this target (%2 bytes)">;
++ def err_return_in_constructor_handler : Error<
++   "return in the catch of a function try block of a constructor is illegal">;
++ def warn_cdtor_function_try_handler_mem_expr : Warning<
++   "cannot refer to a non-static member from the handler of a "
++   "%select{constructor|destructor}0 function try block">, InGroup<Exceptions>;
++ 
++ let CategoryName = "Lambda Issue" in {
++   def err_capture_more_than_once : Error<
++     "%0 can appear only once in a capture list">;
++   def err_reference_capture_with_reference_default : Error<
++     "'&' cannot precede a capture when the capture default is '&'">;
++   def err_copy_capture_with_copy_default : Error<
++     "'&' must precede a capture when the capture default is '='">;
++   def err_capture_does_not_name_variable : Error<
++     "%0 in capture list does not name a variable">;
++   def err_capture_non_automatic_variable : Error<
++     "%0 cannot be captured because it does not have automatic storage "
++     "duration">;
++   def err_this_capture : Error<
++     "'this' cannot be %select{implicitly |}0captured in this context">;
++   def note_lambda_this_capture_fixit : Note<
++     "explicitly capture 'this'">;
++   def err_lambda_capture_anonymous_var : Error<
++     "unnamed variable cannot be implicitly captured in a lambda expression">;
++   def err_lambda_capture_flexarray_type : Error<
++     "variable %0 with flexible array member cannot be captured in "
++     "a lambda expression">;
++   def err_lambda_impcap : Error<
++     "variable %0 cannot be implicitly captured in a lambda with no "
++     "capture-default specified">;
++   def note_lambda_variable_capture_fixit : Note<
++     "capture %0 by %select{value|reference}1">;
++   def note_lambda_default_capture_fixit : Note<
++     "default capture by %select{value|reference}0">;
++   def note_lambda_decl : Note<"lambda expression begins here">;
++   def err_lambda_unevaluated_operand : Error<
++     "lambda expression in an unevaluated operand">;
++   def err_lambda_in_constant_expression : Error<
++     "a lambda expression may not appear inside of a constant expression">;
++   def err_lambda_in_invalid_context : Error<
++     "a lambda expression cannot appear in this context">;
++   def err_lambda_return_init_list : Error<
++     "cannot deduce lambda return type from initializer list">;
++   def err_lambda_capture_default_arg : Error<
++     "lambda expression in default argument cannot capture any entity">;
++   def err_lambda_incomplete_result : Error<
++     "incomplete result type %0 in lambda expression">;
++   def err_noreturn_lambda_has_return_expr : Error<
++     "lambda declared 'noreturn' should not return">;
++   def warn_maybe_falloff_nonvoid_lambda : Warning<
++     "non-void lambda does not return a value in all control paths">,
++     InGroup<ReturnType>;
++   def warn_falloff_nonvoid_lambda : Warning<
++     "non-void lambda does not return a value">,
++     InGroup<ReturnType>;
++   def err_access_lambda_capture : Error<
++     // The ERRORs represent other special members that aren't constructors, in
++     // hopes that someone will bother noticing and reporting if they appear
++     "capture of variable '%0' as type %1 calls %select{private|protected}3 "
++     "%select{default |copy |move |*ERROR* |*ERROR* |*ERROR* |}2constructor">,
++     AccessControl;
++   def note_lambda_to_block_conv : Note<
++     "implicit capture of lambda object due to conversion to block pointer "
++     "here">;
++   def note_var_explicitly_captured_here : Note<"variable %0 is"
++     "%select{| explicitly}1 captured here">;
++ 
++   // C++14 lambda init-captures.
++   def warn_cxx11_compat_init_capture : Warning<
++     "initialized lambda captures are incompatible with C++ standards "
++     "before C++14">, InGroup<CXXPre14Compat>, DefaultIgnore;
++   def ext_init_capture : ExtWarn<
++     "initialized lambda captures are a C++14 extension">, InGroup<CXX14>;
++   def err_init_capture_no_expression : Error<
++     "initializer missing for lambda capture %0">;
++   def err_init_capture_multiple_expressions : Error<
++     "initializer for lambda capture %0 contains multiple expressions">;
++   def err_init_capture_paren_braces : Error<
++     "cannot deduce type for lambda capture %1 from "
++     "%select{parenthesized|nested}0 initializer list">;
++   def err_init_capture_deduction_failure : Error<
++     "cannot deduce type for lambda capture %0 from initializer of type %2">;
++   def err_init_capture_deduction_failure_from_init_list : Error<
++     "cannot deduce type for lambda capture %0 from initializer list">;
++   def warn_cxx17_compat_init_capture_pack : Warning<
++     "initialized lambda capture packs are incompatible with C++ standards "
++     "before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++   def ext_init_capture_pack : ExtWarn<
++     "initialized lambda pack captures are a C++20 extension">, InGroup<CXX20>;
++ 
++   // C++14 generic lambdas.
++   def warn_cxx11_compat_generic_lambda : Warning<
++     "generic lambdas are incompatible with C++11">,
++     InGroup<CXXPre14Compat>, DefaultIgnore;
++ 
++   // C++17 '*this' captures.
++   def warn_cxx14_compat_star_this_lambda_capture : Warning<
++     "by value capture of '*this' is incompatible with C++ standards before C++17">,
++      InGroup<CXXPre17Compat>, DefaultIgnore;
++   def ext_star_this_lambda_capture_cxx17 : ExtWarn<
++     "capture of '*this' by copy is a C++17 extension">, InGroup<CXX17>;
++ 
++   // C++17 parameter shadows capture
++   def err_parameter_shadow_capture : Error<
++     "a lambda parameter cannot shadow an explicitly captured entity">;
++ 
++   // C++20 [=, this] captures.
++   def warn_cxx17_compat_equals_this_lambda_capture : Warning<
++     "explicit capture of 'this' with a capture default of '=' is incompatible "
++     "with C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++   def ext_equals_this_lambda_capture_cxx20 : ExtWarn<
++     "explicit capture of 'this' with a capture default of '=' "
++     "is a C++20 extension">, InGroup<CXX20>;
++   def warn_deprecated_this_capture : Warning<
++     "implicit capture of 'this' with a capture default of '=' is deprecated">,
++     InGroup<DeprecatedThisCapture>, DefaultIgnore;
++   def note_deprecated_this_capture : Note<
++     "add an explicit capture of 'this' to capture '*this' by reference">;
++ 
++   // C++20 default constructible / assignable lambdas.
++   def warn_cxx17_compat_lambda_def_ctor_assign : Warning<
++     "%select{default construction|assignment}0 of lambda is incompatible with "
++     "C++ standards before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ }
++ 
++ def err_return_in_captured_stmt : Error<
++   "cannot return from %0">;
++ def err_capture_block_variable : Error<
++   "__block variable %0 cannot be captured in a "
++   "%select{lambda expression|captured statement}1">;
++ 
++ def err_operator_arrow_circular : Error<
++   "circular pointer delegation detected">;
++ def err_operator_arrow_depth_exceeded : Error<
++   "use of 'operator->' on type %0 would invoke a sequence of more than %1 "
++   "'operator->' calls">;
++ def note_operator_arrow_here : Note<
++   "'operator->' declared here produces an object of type %0">;
++ def note_operator_arrows_suppressed : Note<
++   "(skipping %0 'operator->'%s0 in backtrace)">;
++ def note_operator_arrow_depth : Note<
++   "use -foperator-arrow-depth=N to increase 'operator->' limit">;
++ 
++ def err_pseudo_dtor_base_not_scalar : Error<
++   "object expression of non-scalar type %0 cannot be used in a "
++   "pseudo-destructor expression">;
++ def ext_pseudo_dtor_on_void : ExtWarn<
++   "pseudo-destructors on type void are a Microsoft extension">,
++   InGroup<MicrosoftVoidPseudoDtor>;
++ def err_pseudo_dtor_type_mismatch : Error<
++   "the type of object expression "
++   "%diff{($) does not match the type being destroyed ($)|"
++   "does not match the type being destroyed}0,1 "
++   "in pseudo-destructor expression">;
++ def err_pseudo_dtor_call_with_args : Error<
++   "call to pseudo-destructor cannot have any arguments">;
++ def err_dtor_expr_without_call : Error<
++   "reference to %select{destructor|pseudo-destructor}0 must be called"
++   "%select{|; did you mean to call it with no arguments?}1">;
++ def err_pseudo_dtor_destructor_non_type : Error<
++   "%0 does not refer to a type name in pseudo-destructor expression; expected "
++   "the name of type %1">;
++ def err_invalid_use_of_function_type : Error<
++   "a function type is not allowed here">;
++ def err_invalid_use_of_array_type : Error<"an array type is not allowed here">;
++ def err_typecheck_bool_condition : Error<
++   "value of type %0 is not contextually convertible to 'bool'">;
++ def err_typecheck_ambiguous_condition : Error<
++   "conversion %diff{from $ to $|between types}0,1 is ambiguous">;
++ def err_typecheck_nonviable_condition : Error<
++   "no viable conversion%select{%diff{ from $ to $|}1,2|"
++   "%diff{ from returned value of type $ to function return type $|}1,2}0">;
++ def err_typecheck_nonviable_condition_incomplete : Error<
++   "no viable conversion%diff{ from $ to incomplete type $|}0,1">;
++ def err_typecheck_deleted_function : Error<
++   "conversion function %diff{from $ to $|between types}0,1 "
++   "invokes a deleted function">;
++ 
++ def err_expected_class_or_namespace : Error<"%0 is not a class"
++   "%select{ or namespace|, namespace, or enumeration}1">;
++ def err_invalid_declarator_scope : Error<"cannot define or redeclare %0 here "
++   "because namespace %1 does not enclose namespace %2">;
++ def err_invalid_declarator_global_scope : Error<
++   "definition or redeclaration of %0 cannot name the global scope">;
++ def err_invalid_declarator_in_function : Error<
++   "definition or redeclaration of %0 not allowed inside a function">;
++ def err_invalid_declarator_in_block : Error<
++   "definition or redeclaration of %0 not allowed inside a block">;
++ def err_not_tag_in_scope : Error<
++   "no %select{struct|interface|union|class|enum}0 named %1 in %2">;
++ 
++ def err_no_typeid_with_fno_rtti : Error<
++   "use of typeid requires -frtti">;
++ def err_no_dynamic_cast_with_fno_rtti : Error<
++   "use of dynamic_cast requires -frtti">;
++ def warn_no_dynamic_cast_with_rtti_disabled: Warning<
++   "dynamic_cast will not work since RTTI data is disabled by "
++   "%select{-fno-rtti-data|/GR-}0">, InGroup<RTTI>;
++ def warn_no_typeid_with_rtti_disabled: Warning<
++   "typeid will not work since RTTI data is disabled by "
++   "%select{-fno-rtti-data|/GR-}0">, InGroup<RTTI>;
++ 
++ def err_cannot_form_pointer_to_member_of_reference_type : Error<
++   "cannot form a pointer-to-member to member %0 of reference type %1">;
++ def err_incomplete_object_call : Error<
++   "incomplete type in call to object of type %0">;
++ 
++ def warn_condition_is_assignment : Warning<"using the result of an "
++   "assignment as a condition without parentheses">,
++   InGroup<Parentheses>;
++ def warn_free_nonheap_object
++   : Warning<"attempt to call %0 on non-heap %select{object %2|object: block expression|object: lambda-to-function-pointer conversion}1">,
++     InGroup<FreeNonHeapObject>;
++ 
++ // Completely identical except off by default.
++ def warn_condition_is_idiomatic_assignment : Warning<"using the result "
++   "of an assignment as a condition without parentheses">,
++   InGroup<DiagGroup<"idiomatic-parentheses">>, DefaultIgnore;
++ def note_condition_assign_to_comparison : Note<
++   "use '==' to turn this assignment into an equality comparison">;
++ def note_condition_or_assign_to_comparison : Note<
++   "use '!=' to turn this compound assignment into an inequality comparison">;
++ def note_condition_assign_silence : Note<
++   "place parentheses around the assignment to silence this warning">;
++ 
++ def warn_equality_with_extra_parens : Warning<"equality comparison with "
++   "extraneous parentheses">, InGroup<ParenthesesOnEquality>;
++ def note_equality_comparison_to_assign : Note<
++   "use '=' to turn this equality comparison into an assignment">;
++ def note_equality_comparison_silence : Note<
++   "remove extraneous parentheses around the comparison to silence this warning">;
++ 
++ // assignment related diagnostics (also for argument passing, returning, etc).
++ // In most of these diagnostics the %2 is a value from the
++ // Sema::AssignmentAction enumeration
++ def err_typecheck_convert_incompatible : Error<
++   "%select{%diff{assigning to $ from incompatible type $|"
++   "assigning to type from incompatible type}0,1"
++   "|%diff{passing $ to parameter of incompatible type $|"
++   "passing type to parameter of incompatible type}0,1"
++   "|%diff{returning $ from a function with incompatible result type $|"
++   "returning type from a function with incompatible result type}0,1"
++   "|%diff{converting $ to incompatible type $|"
++   "converting type to incompatible type}0,1"
++   "|%diff{initializing $ with an expression of incompatible type $|"
++   "initializing type with an expression of incompatible type}0,1"
++   "|%diff{sending $ to parameter of incompatible type $|"
++   "sending type to parameter of incompatible type}0,1"
++   "|%diff{casting $ to incompatible type $|"
++   "casting type to incompatible type}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3"
++   "%select{|: different classes%diff{ ($ vs $)|}5,6"
++   "|: different number of parameters (%5 vs %6)"
++   "|: type mismatch at %ordinal5 parameter%diff{ ($ vs $)|}6,7"
++   "|: different return type%diff{ ($ vs $)|}5,6"
++   "|: different qualifiers (%5 vs %6)"
++   "|: different exception specifications}4">;
++ def err_typecheck_missing_return_type_incompatible : Error<
++   "%diff{return type $ must match previous return type $|"
++   "return type must match previous return type}0,1 when %select{block "
++   "literal|lambda expression}2 has unspecified explicit return type">;
++ 
++ def note_incomplete_class_and_qualified_id : Note<
++   "conformance of forward class %0 to protocol %1 can not be confirmed">;
++ def warn_incompatible_qualified_id : Warning<
++   "%select{%diff{assigning to $ from incompatible type $|"
++   "assigning to type from incompatible type}0,1"
++   "|%diff{passing $ to parameter of incompatible type $|"
++   "passing type to parameter of incompatible type}0,1"
++   "|%diff{returning $ from a function with incompatible result type $|"
++   "returning type from a function with incompatible result type}0,1"
++   "|%diff{converting $ to incompatible type $|"
++   "converting type to incompatible type}0,1"
++   "|%diff{initializing $ with an expression of incompatible type $|"
++   "initializing type with an expression of incompatible type}0,1"
++   "|%diff{sending $ to parameter of incompatible type $|"
++   "sending type to parameter of incompatible type}0,1"
++   "|%diff{casting $ to incompatible type $|"
++   "casting type to incompatible type}0,1}2">;
++ def err_incompatible_qualified_id : Error<
++   "%select{%diff{assigning to $ from incompatible type $|"
++   "assigning to type from incompatible type}0,1"
++   "|%diff{passing $ to parameter of incompatible type $|"
++   "passing type to parameter of incompatible type}0,1"
++   "|%diff{returning $ from a function with incompatible result type $|"
++   "returning type from a function with incompatible result type}0,1"
++   "|%diff{converting $ to incompatible type $|"
++   "converting type to incompatible type}0,1"
++   "|%diff{initializing $ with an expression of incompatible type $|"
++   "initializing type with an expression of incompatible type}0,1"
++   "|%diff{sending $ to parameter of incompatible type $|"
++   "sending type to parameter of incompatible type}0,1"
++   "|%diff{casting $ to incompatible type $|"
++   "casting type to incompatible type}0,1}2">;
++ def ext_typecheck_convert_pointer_int : ExtWarn<
++   "incompatible pointer to integer conversion "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">,
++   InGroup<IntConversion>;
++ def err_typecheck_convert_pointer_int : Error<
++   "incompatible pointer to integer conversion "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">;
++ def ext_typecheck_convert_int_pointer : ExtWarn<
++   "incompatible integer to pointer conversion "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">,
++   InGroup<IntConversion>, SFINAEFailure;
++ def err_typecheck_convert_int_pointer : Error<
++   "incompatible integer to pointer conversion "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">;
++ def ext_typecheck_convert_pointer_void_func : Extension<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " converts between void pointer and function pointer">;
++ def err_typecheck_convert_pointer_void_func : Error<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " converts between void pointer and function pointer">;
++ def ext_typecheck_convert_incompatible_pointer_sign : ExtWarn<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " converts between pointers to integer types %select{with different sign|"
++   "where one is of the unique plain 'char' type and the other is not}3">,
++   InGroup<DiagGroup<"pointer-sign">>;
++ def err_typecheck_convert_incompatible_pointer_sign :
++   Error<ext_typecheck_convert_incompatible_pointer_sign.Text>;
++ def ext_typecheck_convert_incompatible_pointer : ExtWarn<
++   "incompatible pointer types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">,
++   InGroup<IncompatiblePointerTypes>;
++ def err_typecheck_convert_incompatible_pointer : Error<
++   "incompatible pointer types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">;
++ def ext_typecheck_convert_incompatible_function_pointer : ExtWarn<
++   "incompatible function pointer types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">,
++   InGroup<IncompatibleFunctionPointerTypes>;
++ def err_typecheck_convert_incompatible_function_pointer : Error<
++   "incompatible function pointer types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   "%select{|; dereference with *|"
++   "; take the address with &|"
++   "; remove *|"
++   "; remove &}3">;
++ def ext_typecheck_convert_discards_qualifiers : ExtWarn<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " discards qualifiers">,
++   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
++ def err_typecheck_convert_discards_qualifiers : Error<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " discards qualifiers">;
++ def ext_nested_pointer_qualifier_mismatch : ExtWarn<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " discards qualifiers in nested pointer types">,
++   InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
++ def err_nested_pointer_qualifier_mismatch : Error<
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " discards qualifiers in nested pointer types">;
++ def warn_incompatible_vectors : Warning<
++   "incompatible vector types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2">,
++   InGroup<VectorConversion>, DefaultIgnore;
++ def err_incompatible_vectors : Error<
++   "incompatible vector types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2">;
++ def err_int_to_block_pointer : Error<
++   "invalid block pointer conversion "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2">;
++ def err_typecheck_convert_incompatible_block_pointer : Error<
++   "incompatible block pointer types "
++   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2">;
++ def err_typecheck_incompatible_address_space : Error<
++   "%select{%diff{assigning $ to $|assigning to different types}1,0"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " changes address space of pointer">;
++ def err_typecheck_incompatible_nested_address_space : Error<
++   "%select{%diff{assigning $ to $|assigning to different types}1,0"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " changes address space of nested pointer">;
++ def err_typecheck_incompatible_ownership : Error<
++   "%select{%diff{assigning $ to $|assigning to different types}1,0"
++   "|%diff{passing $ to parameter of type $|"
++   "passing to parameter of different type}0,1"
++   "|%diff{returning $ from a function with result type $|"
++   "returning from function with different return type}0,1"
++   "|%diff{converting $ to type $|converting between types}0,1"
++   "|%diff{initializing $ with an expression of type $|"
++   "initializing with expression of different type}0,1"
++   "|%diff{sending $ to parameter of type $|"
++   "sending to parameter of different type}0,1"
++   "|%diff{casting $ to type $|casting between types}0,1}2"
++   " changes retain/release properties of pointer">;
++ def err_typecheck_comparison_of_distinct_blocks : Error<
++   "comparison of distinct block types%diff{ ($ and $)|}0,1">;
++ 
++ def err_typecheck_array_not_modifiable_lvalue : Error<
++   "array type %0 is not assignable">;
++ def err_typecheck_non_object_not_modifiable_lvalue : Error<
++   "non-object type %0 is not assignable">;
++ def err_typecheck_expression_not_modifiable_lvalue : Error<
++   "expression is not assignable">;
++ def err_typecheck_incomplete_type_not_modifiable_lvalue : Error<
++   "incomplete type %0 is not assignable">;
++ def err_typecheck_lvalue_casts_not_supported : Error<
++   "assignment to cast is illegal, lvalue casts are not supported">;
++ 
++ def err_typecheck_duplicate_vector_components_not_mlvalue : Error<
++   "vector is not assignable (contains duplicate components)">;
++ def err_block_decl_ref_not_modifiable_lvalue : Error<
++   "variable is not assignable (missing __block type specifier)">;
++ def err_lambda_decl_ref_not_modifiable_lvalue : Error<
++   "cannot assign to a variable captured by copy in a non-mutable lambda">;
++ def err_typecheck_call_not_function : Error<
++   "called object type %0 is not a function or function pointer">;
++ def err_call_incomplete_return : Error<
++   "calling function with incomplete return type %0">;
++ def err_call_function_incomplete_return : Error<
++   "calling %0 with incomplete return type %1">;
++ def err_call_incomplete_argument : Error<
++   "argument type %0 is incomplete">;
++ def err_typecheck_call_too_few_args : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected %1, have %2">;
++ def err_typecheck_call_too_few_args_one : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "single argument %1 was not specified">;
++ def err_typecheck_call_too_few_args_at_least : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected at least %1, have %2">;
++ def err_typecheck_call_too_few_args_at_least_one : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "at least argument %1 must be specified">;
++ def err_typecheck_call_too_few_args_suggest : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected %1, have %2; did you mean %3?">;
++ def err_typecheck_call_too_few_args_at_least_suggest : Error<
++   "too few %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected at least %1, have %2; did you mean %3?">;
++ def err_typecheck_call_too_many_args : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected %1, have %2">;
++ def err_typecheck_call_too_many_args_one : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected single argument %1, have %2 arguments">;
++ def err_typecheck_call_too_many_args_at_most : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected at most %1, have %2">;
++ def err_typecheck_call_too_many_args_at_most_one : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected at most single argument %1, have %2 arguments">;
++ def err_typecheck_call_too_many_args_suggest : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected %1, have %2; did you mean %3?">;
++ def err_typecheck_call_too_many_args_at_most_suggest : Error<
++   "too many %select{|||execution configuration }0arguments to "
++   "%select{function|block|method|kernel function}0 call, "
++   "expected at most %1, have %2; did you mean %3?">;
++ 
++ def err_arc_typecheck_convert_incompatible_pointer : Error<
++   "incompatible pointer types passing retainable parameter of type %0"
++   "to a CF function expecting %1 type">;
++ 
++ def err_builtin_fn_use : Error<"builtin functions must be directly called">;
++ 
++ def warn_call_wrong_number_of_arguments : Warning<
++   "too %select{few|many}0 arguments in call to %1">;
++ def err_atomic_builtin_must_be_pointer : Error<
++   "address argument to atomic builtin must be a pointer (%0 invalid)">;
++ def err_atomic_builtin_must_be_pointer_intptr : Error<
++   "address argument to atomic builtin must be a pointer to integer or pointer"
++   " (%0 invalid)">;
++ def err_atomic_builtin_cannot_be_const : Error<
++   "address argument to atomic builtin cannot be const-qualified (%0 invalid)">;
++ def err_atomic_builtin_must_be_pointer_intfltptr : Error<
++   "address argument to atomic builtin must be a pointer to integer,"
++   " floating-point or pointer (%0 invalid)">;
++ def err_atomic_builtin_pointer_size : Error<
++   "address argument to atomic builtin must be a pointer to 1,2,4,8 or 16 byte "
++   "type (%0 invalid)">;
++ def err_atomic_exclusive_builtin_pointer_size : Error<
++   "address argument to load or store exclusive builtin must be a pointer to"
++   " 1,2,4 or 8 byte type (%0 invalid)">;
++ def err_atomic_builtin_ext_int_size : Error<
++   "Atomic memory operand must have a power-of-two size">;
++ def err_atomic_builtin_ext_int_prohibit : Error<
++   "argument to atomic builtin of type '_ExtInt' is not supported">;
++ def err_atomic_op_needs_atomic : Error<
++   "address argument to atomic operation must be a pointer to _Atomic "
++   "type (%0 invalid)">;
++ def err_atomic_op_needs_non_const_atomic : Error<
++   "address argument to atomic operation must be a pointer to non-%select{const|constant}0 _Atomic "
++   "type (%1 invalid)">;
++ def err_atomic_op_needs_non_const_pointer : Error<
++   "address argument to atomic operation must be a pointer to non-const "
++   "type (%0 invalid)">;
++ def err_atomic_op_needs_trivial_copy : Error<
++   "address argument to atomic operation must be a pointer to a "
++   "trivially-copyable type (%0 invalid)">;
++ def err_atomic_op_needs_atomic_int_ptr_or_fp : Error<
++   "address argument to atomic operation must be a pointer to %select{|atomic }0"
++   "integer, pointer or supported floating point type (%1 invalid)">;
++ def err_atomic_op_needs_atomic_int_or_ptr : Error<
++   "address argument to atomic operation must be a pointer to %select{|atomic }0"
++   "integer or pointer (%1 invalid)">;
++ def err_atomic_op_needs_atomic_int : Error<
++   "address argument to atomic operation must be a pointer to "
++   "%select{|atomic }0integer (%1 invalid)">;
++ def warn_atomic_op_has_invalid_memory_order : Warning<
++   "memory order argument to atomic operation is invalid">,
++   InGroup<DiagGroup<"atomic-memory-ordering">>;
++ def err_atomic_op_has_invalid_synch_scope : Error<
++   "synchronization scope argument to atomic operation is invalid">;
++ def warn_atomic_implicit_seq_cst : Warning<
++   "implicit use of sequentially-consistent atomic may incur stronger memory barriers than necessary">,
++   InGroup<DiagGroup<"atomic-implicit-seq-cst">>, DefaultIgnore;
++ 
++ def err_overflow_builtin_must_be_int : Error<
++   "operand argument to overflow builtin must be an integer (%0 invalid)">;
++ def err_overflow_builtin_must_be_ptr_int : Error<
++   "result argument to overflow builtin must be a pointer "
++   "to a non-const integer (%0 invalid)">;
++ def err_overflow_builtin_ext_int_max_size : Error<
++   "__builtin_mul_overflow does not support signed _ExtInt operands of more "
++   "than %0 bits">;
++ 
++ def err_atomic_load_store_uses_lib : Error<
++   "atomic %select{load|store}0 requires runtime support that is not "
++   "available for this target">;
++ 
++ def err_nontemporal_builtin_must_be_pointer : Error<
++   "address argument to nontemporal builtin must be a pointer (%0 invalid)">;
++ def err_nontemporal_builtin_must_be_pointer_intfltptr_or_vector : Error<
++   "address argument to nontemporal builtin must be a pointer to integer, float, "
++   "pointer, or a vector of such types (%0 invalid)">;
++ 
++ def err_deleted_function_use : Error<"attempt to use a deleted function">;
++ def err_deleted_inherited_ctor_use : Error<
++   "constructor inherited by %0 from base class %1 is implicitly deleted">;
++ 
++ def note_called_by : Note<"called by %0">;
++ def err_kern_type_not_void_return : Error<
++   "kernel function type %0 must have void return type">;
++ def err_kern_is_nonstatic_method : Error<
++   "kernel function %0 must be a free function or static member function">;
++ def err_config_scalar_return : Error<
++   "CUDA special function '%0' must have scalar return type">;
++ def err_kern_call_not_global_function : Error<
++   "kernel call to non-global function %0">;
++ def err_global_call_not_config : Error<
++   "call to global function %0 not configured">;
++ def err_ref_bad_target : Error<
++   "reference to %select{__device__|__global__|__host__|__host__ __device__}0 "
++   "%select{function|variable}1 %2 in %select{__device__|__global__|__host__|__host__ __device__}3 function">;
++ def note_cuda_const_var_unpromoted : Note<
++   "const variable cannot be emitted on device side due to dynamic initialization">;
++ def note_cuda_host_var : Note<
++   "host variable declared here">;
++ def err_ref_bad_target_global_initializer : Error<
++   "reference to %select{__device__|__global__|__host__|__host__ __device__}0 "
++   "function %1 in global initializer">;
++ def err_capture_bad_target : Error<
++   "capture host variable %0 by reference in device or host device lambda function">;
++ def warn_maybe_capture_bad_target_this_ptr : Warning<
++   "capture host side class data member by this pointer in device or host device lambda function "
++   "may result in invalid memory access if this pointer is not accessible on device side">,
++   InGroup<DiagGroup<"gpu-maybe-wrong-side">>;
++ def warn_kern_is_method : Extension<
++   "kernel function %0 is a member function; this may not be accepted by nvcc">,
++   InGroup<CudaCompat>;
++ def warn_kern_is_inline : Warning<
++   "ignored 'inline' attribute on kernel function %0">,
++   InGroup<CudaCompat>;
++ def err_variadic_device_fn : Error<
++   "CUDA device code does not support variadic functions">;
++ def err_va_arg_in_device : Error<
++   "CUDA device code does not support va_arg">;
++ def err_alias_not_supported_on_nvptx : Error<"CUDA does not support aliases">;
++ def err_cuda_unattributed_constexpr_cannot_overload_device : Error<
++   "constexpr function %0 without __host__ or __device__ attributes cannot "
++   "overload __device__ function with same signature.  Add a __host__ "
++   "attribute, or build with -fno-cuda-host-device-constexpr.">;
++ def note_cuda_conflicting_device_function_declared_here : Note<
++   "conflicting __device__ function declared here">;
++ def err_cuda_device_exceptions : Error<
++   "cannot use '%0' in "
++   "%select{__device__|__global__|__host__|__host__ __device__}1 function">;
++ def err_dynamic_var_init : Error<
++     "dynamic initialization is not supported for "
++     "__device__, __constant__, __shared__, and __managed__ variables.">;
++ def err_shared_var_init : Error<
++     "initialization is not supported for __shared__ variables.">;
++ def err_cuda_vla : Error<
++     "cannot use variable-length arrays in "
++     "%select{__device__|__global__|__host__|__host__ __device__}0 functions">;
++ def err_cuda_extern_shared : Error<"__shared__ variable %0 cannot be 'extern'">;
++ def err_cuda_host_shared : Error<
++     "__shared__ local variables not allowed in "
++     "%select{__device__|__global__|__host__|__host__ __device__}0 functions">;
++ def err_cuda_nonstatic_constdev: Error<"__constant__, __device__, and "
++     "__managed__ are not allowed on non-static local variables">;
++ def err_cuda_ovl_target : Error<
++   "%select{__device__|__global__|__host__|__host__ __device__}0 function %1 "
++   "cannot overload %select{__device__|__global__|__host__|__host__ __device__}2 function %3">;
++ def note_cuda_ovl_candidate_target_mismatch : Note<
++     "candidate template ignored: target attributes do not match">;
++ 
++ def err_cuda_device_builtin_surftex_cls_template : Error<
++     "illegal device builtin %select{surface|texture}0 reference "
++     "class template %1 declared here">;
++ def note_cuda_device_builtin_surftex_cls_should_have_n_args : Note<
++     "%0 needs to have exactly %1 template parameters">;
++ def note_cuda_device_builtin_surftex_cls_should_have_match_arg : Note<
++     "the %select{1st|2nd|3rd}1 template parameter of %0 needs to be "
++     "%select{a type|an integer or enum value}2">;
++ 
++ def err_cuda_device_builtin_surftex_ref_decl : Error<
++     "illegal device builtin %select{surface|texture}0 reference "
++     "type %1 declared here">;
++ def note_cuda_device_builtin_surftex_should_be_template_class : Note<
++     "%0 needs to be instantiated from a class template with proper "
++     "template arguments">;
++ 
++ def err_hip_invalid_args_builtin_mangled_name : Error<
++     "invalid argument: symbol must be a device-side function or global variable">;
++ 
++ def warn_non_pod_vararg_with_format_string : Warning<
++   "cannot pass %select{non-POD|non-trivial}0 object of type %1 to variadic "
++   "%select{function|block|method|constructor}2; expected type from format "
++   "string was %3">, InGroup<NonPODVarargs>, DefaultError;
++ // The arguments to this diagnostic should match the warning above.
++ def err_cannot_pass_objc_interface_to_vararg_format : Error<
++   "cannot pass object with interface type %1 by value to variadic "
++   "%select{function|block|method|constructor}2; expected type from format "
++   "string was %3">;
++ def err_cannot_pass_non_trivial_c_struct_to_vararg : Error<
++   "cannot pass non-trivial C object of type %0 by value to variadic "
++   "%select{function|block|method|constructor}1">;
++ 
++ 
++ def err_cannot_pass_objc_interface_to_vararg : Error<
++   "cannot pass object with interface type %0 by value through variadic "
++   "%select{function|block|method|constructor}1">;
++ def warn_cannot_pass_non_pod_arg_to_vararg : Warning<
++   "cannot pass object of %select{non-POD|non-trivial}0 type %1 through variadic"
++   " %select{function|block|method|constructor}2; call will abort at runtime">,
++   InGroup<NonPODVarargs>, DefaultError;
++ def warn_cxx98_compat_pass_non_pod_arg_to_vararg : Warning<
++   "passing object of trivial but non-POD type %0 through variadic"
++   " %select{function|block|method|constructor}1 is incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ def warn_pass_class_arg_to_vararg : Warning<
++   "passing object of class type %0 through variadic "
++   "%select{function|block|method|constructor}1"
++   "%select{|; did you mean to call '%3'?}2">,
++   InGroup<ClassVarargs>, DefaultIgnore;
++ def err_cannot_pass_to_vararg : Error<
++   "cannot pass %select{expression of type %1|initializer list}0 to variadic "
++   "%select{function|block|method|constructor}2">;
++ def err_cannot_pass_to_vararg_format : Error<
++   "cannot pass %select{expression of type %1|initializer list}0 to variadic "
++   "%select{function|block|method|constructor}2; expected type from format "
++   "string was %3">;
++ 
++ def err_typecheck_call_invalid_ordered_compare : Error<
++   "ordered compare requires two args of floating point type"
++   "%diff{ ($ and $)|}0,1">;
++ def err_typecheck_call_invalid_unary_fp : Error<
++   "floating point classification requires argument of floating point type "
++   "(passed in %0)">;
++ def err_typecheck_cond_expect_int_float : Error<
++   "used type %0 where integer or floating point type is required">;
++ def err_typecheck_cond_expect_scalar : Error<
++   "used type %0 where arithmetic or pointer type is required">;
++ def err_typecheck_cond_expect_nonfloat : Error<
++   "used type %0 where floating point type is not allowed">;
++ def ext_typecheck_cond_one_void : Extension<
++   "C99 forbids conditional expressions with only one void side">;
++ def err_typecheck_cast_to_incomplete : Error<
++   "cast to incomplete type %0">;
++ def ext_typecheck_cast_nonscalar : Extension<
++   "C99 forbids casting nonscalar type %0 to the same type">;
++ def ext_typecheck_cast_to_union : Extension<
++   "cast to union type is a GNU extension">,
++   InGroup<GNUUnionCast>;
++ def err_typecheck_cast_to_union_no_type : Error<
++   "cast to union type from type %0 not present in union">;
++ def err_cast_pointer_from_non_pointer_int : Error<
++   "operand of type %0 cannot be cast to a pointer type">;
++ def warn_cast_pointer_from_sel : Warning<
++   "cast of type %0 to %1 is deprecated; use sel_getName instead">,
++   InGroup<SelTypeCast>;
++ def warn_function_def_in_objc_container : Warning<
++   "function definition inside an Objective-C container is deprecated">,
++   InGroup<FunctionDefInObjCContainer>;
++ def err_typecheck_call_requires_real_fp : Error<
++   "argument type %0 is not a real floating point type">;
++ def err_typecheck_call_different_arg_types : Error<
++   "arguments are of different types%diff{ ($ vs $)|}0,1">;
++ 
++ def warn_cast_calling_conv : Warning<
++   "cast between incompatible calling conventions '%0' and '%1'; "
++   "calls through this pointer may abort at runtime">,
++   InGroup<DiagGroup<"cast-calling-convention">>;
++ def note_change_calling_conv_fixit : Note<
++   "consider defining %0 with the '%1' calling convention">;
++ def warn_bad_function_cast : Warning<
++   "cast from function call of type %0 to non-matching type %1">,
++   InGroup<BadFunctionCast>, DefaultIgnore;
++ def warn_cast_function_type : Warning<
++   "cast %diff{from $ to $ |}0,1converts to incompatible function type">,
++   InGroup<CastFunctionType>, DefaultIgnore;
++ def err_cast_pointer_to_non_pointer_int : Error<
++   "pointer cannot be cast to type %0">;
++ def err_cast_to_bfloat16 : Error<"cannot type-cast to __bf16">;
++ def err_cast_from_bfloat16 : Error<"cannot type-cast from __bf16">;
++ def err_typecheck_expect_scalar_operand : Error<
++   "operand of type %0 where arithmetic or pointer type is required">;
++ def err_typecheck_cond_incompatible_operands : Error<
++   "incompatible operand types%diff{ ($ and $)|}0,1">;
++ def err_typecheck_expect_flt_or_vector : Error<
++   "invalid operand of type %0 where floating, complex or "
++   "a vector of such types is required">;
++ def err_cast_selector_expr : Error<
++   "cannot type cast @selector expression">;
++ def ext_typecheck_cond_incompatible_pointers : ExtWarn<
++   "pointer type mismatch%diff{ ($ and $)|}0,1">,
++   InGroup<DiagGroup<"pointer-type-mismatch">>;
++ def ext_typecheck_cond_pointer_integer_mismatch : ExtWarn<
++   "pointer/integer type mismatch in conditional expression"
++   "%diff{ ($ and $)|}0,1">,
++   InGroup<DiagGroup<"conditional-type-mismatch">>;
++ def err_typecheck_choose_expr_requires_constant : Error<
++   "'__builtin_choose_expr' requires a constant expression">;
++ def warn_unused_expr : Warning<"expression result unused">,
++   InGroup<UnusedValue>;
++ def warn_unused_voidptr : Warning<
++   "expression result unused; should this cast be to 'void'?">,
++   InGroup<UnusedValue>;
++ def warn_unused_property_expr : Warning<
++  "property access result unused - getters should not be used for side effects">,
++   InGroup<UnusedGetterReturnValue>;
++ def warn_unused_container_subscript_expr : Warning<
++  "container access result unused - container access should not be used for side effects">,
++   InGroup<UnusedValue>;
++ def warn_unused_call : Warning<
++   "ignoring return value of function declared with %0 attribute">,
++   InGroup<UnusedValue>;
++ def warn_unused_constructor : Warning<
++   "ignoring temporary created by a constructor declared with %0 attribute">,
++   InGroup<UnusedValue>;
++ def warn_unused_constructor_msg : Warning<
++   "ignoring temporary created by a constructor declared with %0 attribute: %1">,
++   InGroup<UnusedValue>;
++ def warn_side_effects_unevaluated_context : Warning<
++   "expression with side effects has no effect in an unevaluated context">,
++   InGroup<UnevaluatedExpression>;
++ def warn_side_effects_typeid : Warning<
++   "expression with side effects will be evaluated despite being used as an "
++   "operand to 'typeid'">, InGroup<PotentiallyEvaluatedExpression>;
++ def warn_unused_result : Warning<
++   "ignoring return value of function declared with %0 attribute">,
++   InGroup<UnusedResult>;
++ def warn_unused_result_msg : Warning<
++   "ignoring return value of function declared with %0 attribute: %1">,
++   InGroup<UnusedResult>;
++ def warn_unused_volatile : Warning<
++   "expression result unused; assign into a variable to force a volatile load">,
++   InGroup<DiagGroup<"unused-volatile-lvalue">>;
++ 
++ def ext_cxx14_attr : Extension<
++   "use of the %0 attribute is a C++14 extension">, InGroup<CXX14>;
++ def ext_cxx17_attr : Extension<
++   "use of the %0 attribute is a C++17 extension">, InGroup<CXX17>;
++ def ext_cxx20_attr : Extension<
++   "use of the %0 attribute is a C++20 extension">, InGroup<CXX20>;
++ 
++ def warn_unused_comparison : Warning<
++   "%select{equality|inequality|relational|three-way}0 comparison result unused">,
++   InGroup<UnusedComparison>;
++ def note_inequality_comparison_to_or_assign : Note<
++   "use '|=' to turn this inequality comparison into an or-assignment">;
++ 
++ def err_incomplete_type_used_in_type_trait_expr : Error<
++   "incomplete type %0 used in type trait expression">;
++ 
++ // C++20 constinit and require_constant_initialization attribute
++ def warn_cxx20_compat_constinit : Warning<
++   "'constinit' specifier is incompatible with C++ standards before C++20">,
++   InGroup<CXX20Compat>, DefaultIgnore;
++ def err_constinit_local_variable : Error<
++   "local variable cannot be declared 'constinit'">;
++ def err_require_constant_init_failed : Error<
++   "variable does not have a constant initializer">;
++ def note_declared_required_constant_init_here : Note<
++   "required by %select{'require_constant_initialization' attribute|"
++   "'constinit' specifier}0 here">;
++ def ext_constinit_missing : ExtWarn<
++   "'constinit' specifier missing on initializing declaration of %0">,
++   InGroup<DiagGroup<"missing-constinit">>;
++ def note_constinit_specified_here : Note<"variable declared constinit here">;
++ def err_constinit_added_too_late : Error<
++   "'constinit' specifier added after initialization of variable">;
++ def warn_require_const_init_added_too_late : Warning<
++   "'require_constant_initialization' attribute added after initialization "
++   "of variable">, InGroup<IgnoredAttributes>;
++ def note_constinit_missing_here : Note<
++   "add the "
++   "%select{'require_constant_initialization' attribute|'constinit' specifier}0 "
++   "to the initializing declaration here">;
++ 
++ def err_dimension_expr_not_constant_integer : Error<
++   "dimension expression does not evaluate to a constant unsigned int">;
++ 
++ def err_typecheck_cond_incompatible_operands_null : Error<
++   "non-pointer operand type %0 incompatible with %select{NULL|nullptr}1">;
++ def ext_empty_struct_union : Extension<
++   "empty %select{struct|union}0 is a GNU extension">, InGroup<GNUEmptyStruct>;
++ def ext_no_named_members_in_struct_union : Extension<
++   "%select{struct|union}0 without named members is a GNU extension">, InGroup<GNUEmptyStruct>;
++ def warn_zero_size_struct_union_compat : Warning<"%select{|empty }0"
++   "%select{struct|union}1 has size 0 in C, %select{size 1|non-zero size}2 in C++">,
++   InGroup<CXXCompat>, DefaultIgnore;
++ def warn_zero_size_struct_union_in_extern_c : Warning<"%select{|empty }0"
++   "%select{struct|union}1 has size 0 in C, %select{size 1|non-zero size}2 in C++">,
++   InGroup<ExternCCompat>;
++ def warn_cast_qual : Warning<"cast from %0 to %1 drops %select{const and "
++   "volatile qualifiers|const qualifier|volatile qualifier}2">,
++   InGroup<CastQual>, DefaultIgnore;
++ def warn_cast_qual2 : Warning<"cast from %0 to %1 must have all intermediate "
++   "pointers const qualified to be safe">, InGroup<CastQual>, DefaultIgnore;
++ def warn_redefine_extname_not_applied : Warning<
++   "#pragma redefine_extname is applicable to external C declarations only; "
++   "not applied to %select{function|variable}0 %1">,
++   InGroup<Pragmas>;
++ } // End of general sema category.
++ 
++ // inline asm.
++ let CategoryName = "Inline Assembly Issue" in {
++   def err_asm_invalid_lvalue_in_output : Error<"invalid lvalue in asm output">;
++   def err_asm_invalid_output_constraint : Error<
++     "invalid output constraint '%0' in asm">;
++   def err_asm_invalid_lvalue_in_input : Error<
++     "invalid lvalue in asm input for constraint '%0'">;
++   def err_asm_invalid_input_constraint : Error<
++     "invalid input constraint '%0' in asm">;
++   def err_asm_tying_incompatible_types : Error<
++     "unsupported inline asm: input with type "
++     "%diff{$ matching output with type $|}0,1">;
++   def err_asm_unexpected_constraint_alternatives : Error<
++     "asm constraint has an unexpected number of alternatives: %0 vs %1">;
++   def err_asm_incomplete_type : Error<"asm operand has incomplete type %0">;
++   def err_asm_unknown_register_name : Error<"unknown register name '%0' in asm">;
++   def err_asm_unwind_and_goto : Error<"unwind clobber can't be used with asm goto">;
++   def err_asm_invalid_global_var_reg : Error<"register '%0' unsuitable for "
++     "global register variables on this target">;
++   def err_asm_register_size_mismatch : Error<"size of register '%0' does not "
++     "match variable size">;
++   def err_asm_bad_register_type : Error<"bad type for named register variable">;
++   def err_asm_invalid_input_size : Error<
++     "invalid input size for constraint '%0'">;
++   def err_asm_invalid_output_size : Error<
++     "invalid output size for constraint '%0'">;
++   def err_invalid_asm_cast_lvalue : Error<
++     "invalid use of a cast in a inline asm context requiring an lvalue: "
++     "remove the cast or build with -fheinous-gnu-extensions">;
++   def err_invalid_asm_value_for_constraint
++       : Error <"value '%0' out of range for constraint '%1'">;
++   def err_asm_non_addr_value_in_memory_constraint : Error <
++     "reference to a %select{bit-field|vector element|global register variable}0"
++     " in asm %select{input|output}1 with a memory constraint '%2'">;
++   def err_asm_input_duplicate_match : Error<
++     "more than one input constraint matches the same output '%0'">;
++ 
++   def warn_asm_label_on_auto_decl : Warning<
++     "ignored asm label '%0' on automatic variable">;
++   def warn_invalid_asm_cast_lvalue : Warning<
++     "invalid use of a cast in an inline asm context requiring an lvalue: "
++     "accepted due to -fheinous-gnu-extensions, but clang may remove support "
++     "for this in the future">;
++   def warn_asm_mismatched_size_modifier : Warning<
++     "value size does not match register size specified by the constraint "
++     "and modifier">,
++     InGroup<ASMOperandWidths>;
++ 
++   def note_asm_missing_constraint_modifier : Note<
++     "use constraint modifier \"%0\"">;
++   def note_asm_input_duplicate_first : Note<
++     "constraint '%0' is already present here">;
++  def error_duplicate_asm_operand_name : Error<
++     "duplicate use of asm operand name \"%0\"">;
++  def note_duplicate_asm_operand_name : Note<
++     "asm operand name \"%0\" first referenced here">;
++ }
++ 
++   def error_inoutput_conflict_with_clobber : Error<
++     "asm-specifier for input or output variable conflicts with asm"
++     " clobber list">;
++ 
++ let CategoryName = "Semantic Issue" in {
++ 
++ def err_invalid_conversion_between_matrixes : Error<
++   "conversion between matrix types%diff{ $ and $|}0,1 of different size is not allowed">;
++ 
++ def err_invalid_conversion_between_matrix_and_type : Error<
++   "conversion between matrix type %0 and incompatible type %1 is not allowed">;
++ 
++ def err_invalid_conversion_between_vectors : Error<
++   "invalid conversion between vector type%diff{ $ and $|}0,1 of different "
++   "size">;
++ def err_invalid_conversion_between_vector_and_integer : Error<
++   "invalid conversion between vector type %0 and integer type %1 "
++   "of different size">;
++ 
++ def err_opencl_function_pointer : Error<
++   "%select{pointers|references}0 to functions are not allowed">;
++ 
++ def err_opencl_taking_address_capture : Error<
++   "taking address of a capture is not allowed">;
++ 
++ def err_invalid_conversion_between_vector_and_scalar : Error<
++   "invalid conversion between vector type %0 and scalar type %1">;
++ 
++ // C++ member initializers.
++ def err_only_constructors_take_base_inits : Error<
++   "only constructors take base initializers">;
++ 
++ def err_multiple_mem_initialization : Error <
++   "multiple initializations given for non-static member %0">;
++ def err_multiple_mem_union_initialization : Error <
++   "initializing multiple members of union">;
++ def err_multiple_base_initialization : Error <
++   "multiple initializations given for base %0">;
++ 
++ def err_mem_init_not_member_or_class : Error<
++   "member initializer %0 does not name a non-static data member or base "
++   "class">;
++ 
++ def warn_initializer_out_of_order : Warning<
++   "%select{field|base class}0 %1 will be initialized after "
++   "%select{field|base}2 %3">,
++   InGroup<ReorderCtor>, DefaultIgnore;
++ 
++ def warn_some_initializers_out_of_order : Warning<
++   "initializer order does not match the declaration order">,
++   InGroup<ReorderCtor>, DefaultIgnore;
++ 
++ def note_initializer_out_of_order : Note<
++   "%select{field|base class}0 %1 will be initialized after "
++   "%select{field|base}2 %3">;
++ 
++ def warn_abstract_vbase_init_ignored : Warning<
++   "initializer for virtual base class %0 of abstract class %1 "
++   "will never be used">,
++   InGroup<DiagGroup<"abstract-vbase-init">>, DefaultIgnore;
++ 
++ def err_base_init_does_not_name_class : Error<
++   "constructor initializer %0 does not name a class">;
++ def err_base_init_direct_and_virtual : Error<
++   "base class initializer %0 names both a direct base class and an "
++   "inherited virtual base class">;
++ def err_not_direct_base_or_virtual : Error<
++   "type %0 is not a direct or virtual base of %1">;
++ 
++ def err_in_class_initializer_non_const : Error<
++   "non-const static data member must be initialized out of line">;
++ def err_in_class_initializer_volatile : Error<
++   "static const volatile data member must be initialized out of line">;
++ def err_in_class_initializer_bad_type : Error<
++   "static data member of type %0 must be initialized out of line">;
++ def ext_in_class_initializer_float_type : ExtWarn<
++   "in-class initializer for static data member of type %0 is a GNU extension">,
++   InGroup<GNUStaticFloatInit>;
++ def ext_in_class_initializer_float_type_cxx11 : ExtWarn<
++   "in-class initializer for static data member of type %0 requires "
++   "'constexpr' specifier">, InGroup<StaticFloatInit>, DefaultError;
++ def note_in_class_initializer_float_type_cxx11 : Note<"add 'constexpr'">;
++ def err_in_class_initializer_literal_type : Error<
++   "in-class initializer for static data member of type %0 requires "
++   "'constexpr' specifier">;
++ def err_in_class_initializer_non_constant : Error<
++   "in-class initializer for static data member is not a constant expression">;
++ def err_default_member_initializer_not_yet_parsed : Error<
++   "default member initializer for %1 needed within definition of enclosing "
++   "class %0 outside of member functions">;
++ def note_default_member_initializer_not_yet_parsed : Note<
++   "default member initializer declared here">;
++ def err_default_member_initializer_cycle
++     : Error<"default member initializer for %0 uses itself">;
++ 
++ def ext_in_class_initializer_non_constant : Extension<
++   "in-class initializer for static data member is not a constant expression; "
++   "folding it to a constant is a GNU extension">, InGroup<GNUFoldingConstant>;
++ 
++ def err_thread_dynamic_init : Error<
++   "initializer for thread-local variable must be a constant expression">;
++ def err_thread_nontrivial_dtor : Error<
++   "type of thread-local variable has non-trivial destruction">;
++ def note_use_thread_local : Note<
++   "use 'thread_local' to allow this">;
++ 
++ // C++ anonymous unions and GNU anonymous structs/unions
++ def ext_anonymous_union : Extension<
++   "anonymous unions are a C11 extension">, InGroup<C11>;
++ def ext_gnu_anonymous_struct : Extension<
++   "anonymous structs are a GNU extension">, InGroup<GNUAnonymousStruct>;
++ def ext_c11_anonymous_struct : Extension<
++   "anonymous structs are a C11 extension">, InGroup<C11>;
++ def err_anonymous_union_not_static : Error<
++   "anonymous unions at namespace or global scope must be declared 'static'">;
++ def err_anonymous_union_with_storage_spec : Error<
++   "anonymous union at class scope must not have a storage specifier">;
++ def err_anonymous_struct_not_member : Error<
++   "anonymous %select{structs|structs and classes}0 must be "
++   "%select{struct or union|class}0 members">;
++ def err_anonymous_record_member_redecl : Error<
++   "member of anonymous %select{struct|union}0 redeclares %1">;
++ def err_anonymous_record_with_type : Error<
++   "types cannot be declared in an anonymous %select{struct|union}0">;
++ def ext_anonymous_record_with_type : Extension<
++   "types declared in an anonymous %select{struct|union}0 are a Microsoft "
++   "extension">, InGroup<MicrosoftAnonTag>;
++ def ext_anonymous_record_with_anonymous_type : Extension<
++   "anonymous types declared in an anonymous %select{struct|union}0 "
++   "are an extension">, InGroup<DiagGroup<"nested-anon-types">>;
++ def err_anonymous_record_with_function : Error<
++   "functions cannot be declared in an anonymous %select{struct|union}0">;
++ def err_anonymous_record_with_static : Error<
++   "static members cannot be declared in an anonymous %select{struct|union}0">;
++ def err_anonymous_record_bad_member : Error<
++   "anonymous %select{struct|union}0 can only contain non-static data members">;
++ def err_anonymous_record_nonpublic_member : Error<
++   "anonymous %select{struct|union}0 cannot contain a "
++   "%select{private|protected}1 data member">;
++ def ext_ms_anonymous_record : ExtWarn<
++   "anonymous %select{structs|unions}0 are a Microsoft extension">,
++   InGroup<MicrosoftAnonTag>;
++ 
++ // C++ local classes
++ def err_reference_to_local_in_enclosing_context : Error<
++   "reference to local %select{variable|binding}1 %0 declared in enclosing "
++   "%select{%3|block literal|lambda expression|context}2">;
++ 
++ def err_static_data_member_not_allowed_in_local_class : Error<
++   "static data member %0 not allowed in local %sub{select_tag_type_kind}2 %1">;
++ 
++ // C++ derived classes
++ def err_base_clause_on_union : Error<"unions cannot have base classes">;
++ def err_base_must_be_class : Error<"base specifier must name a class">;
++ def err_union_as_base_class : Error<"unions cannot be base classes">;
++ def err_circular_inheritance : Error<
++   "circular inheritance between %0 and %1">;
++ def err_base_class_has_flexible_array_member : Error<
++   "base class %0 has a flexible array member">;
++ def err_incomplete_base_class : Error<"base class has incomplete type">;
++ def err_duplicate_base_class : Error<
++   "base class %0 specified more than once as a direct base class">;
++ def warn_inaccessible_base_class : Warning<
++   "direct base %0 is inaccessible due to ambiguity:%1">,
++   InGroup<DiagGroup<"inaccessible-base">>;
++ // FIXME: better way to display derivation?  Pass entire thing into diagclient?
++ def err_ambiguous_derived_to_base_conv : Error<
++   "ambiguous conversion from derived class %0 to base class %1:%2">;
++ def err_ambiguous_memptr_conv : Error<
++   "ambiguous conversion from pointer to member of %select{base|derived}0 "
++   "class %1 to pointer to member of %select{derived|base}0 class %2:%3">;
++ def ext_ms_ambiguous_direct_base : ExtWarn<
++   "accessing inaccessible direct base %0 of %1 is a Microsoft extension">,
++   InGroup<MicrosoftInaccessibleBase>;
++ 
++ def err_memptr_conv_via_virtual : Error<
++   "conversion from pointer to member of class %0 to pointer to member "
++   "of class %1 via virtual base %2 is not allowed">;
++ 
++ // C++ member name lookup
++ def err_ambiguous_member_multiple_subobjects : Error<
++   "non-static member %0 found in multiple base-class subobjects of type %1:%2">;
++ def err_ambiguous_member_multiple_subobject_types : Error<
++   "member %0 found in multiple base classes of different types">;
++ def note_ambiguous_member_found : Note<"member found by ambiguous name lookup">;
++ def note_ambiguous_member_type_found : Note<
++   "member type %0 found by ambiguous name lookup">;
++ def err_ambiguous_reference : Error<"reference to %0 is ambiguous">;
++ def note_ambiguous_candidate : Note<"candidate found by name lookup is %q0">;
++ def err_ambiguous_tag_hiding : Error<"a type named %0 is hidden by a "
++   "declaration in a different namespace">;
++ def note_hidden_tag : Note<"type declaration hidden">;
++ def note_hiding_object : Note<"declaration hides type">;
++ 
++ // C++ operator overloading
++ def err_operator_overload_needs_class_or_enum : Error<
++   "overloaded %0 must have at least one parameter of class "
++   "or enumeration type">;
++ 
++ def err_operator_overload_variadic : Error<"overloaded %0 cannot be variadic">;
++ def err_operator_overload_static : Error<
++   "overloaded %0 cannot be a static member function">;
++ def err_operator_overload_default_arg : Error<
++   "parameter of overloaded %0 cannot have a default argument">;
++ def err_operator_overload_must_be : Error<
++   "overloaded %0 must be a %select{unary|binary|unary or binary}2 operator "
++   "(has %1 parameter%s1)">;
++ 
++ def err_operator_overload_must_be_member : Error<
++   "overloaded %0 must be a non-static member function">;
++ def err_operator_overload_post_incdec_must_be_int : Error<
++   "parameter of overloaded post-%select{increment|decrement}1 operator must "
++   "have type 'int' (not %0)">;
++ 
++ // C++ allocation and deallocation functions.
++ def err_operator_new_delete_declared_in_namespace : Error<
++   "%0 cannot be declared inside a namespace">;
++ def err_operator_new_delete_declared_static : Error<
++   "%0 cannot be declared static in global scope">;
++ def ext_operator_new_delete_declared_inline : ExtWarn<
++   "replacement function %0 cannot be declared 'inline'">,
++   InGroup<DiagGroup<"inline-new-delete">>;
++ def err_operator_new_delete_invalid_result_type : Error<
++   "%0 must return type %1">;
++ def err_operator_new_delete_dependent_result_type : Error<
++   "%0 cannot have a dependent return type; use %1 instead">;
++ def err_operator_new_delete_too_few_parameters : Error<
++   "%0 must have at least one parameter">;
++ def err_operator_new_delete_template_too_few_parameters : Error<
++   "%0 template must have at least two parameters">;
++ def warn_operator_new_returns_null : Warning<
++   "%0 should not return a null pointer unless it is declared 'throw()'"
++   "%select{| or 'noexcept'}1">, InGroup<OperatorNewReturnsNull>;
++ 
++ def err_operator_new_dependent_param_type : Error<
++   "%0 cannot take a dependent type as first parameter; "
++   "use size_t (%1) instead">;
++ def err_operator_new_param_type : Error<
++   "%0 takes type size_t (%1) as first parameter">;
++ def err_operator_new_default_arg: Error<
++   "parameter of %0 cannot have a default argument">;
++ def err_operator_delete_dependent_param_type : Error<
++   "%0 cannot take a dependent type as first parameter; use %1 instead">;
++ def err_operator_delete_param_type : Error<
++   "first parameter of %0 must have type %1">;
++ def err_destroying_operator_delete_not_usual : Error<
++   "destroying operator delete can have only an optional size and optional "
++   "alignment parameter">;
++ def note_implicit_delete_this_in_destructor_here : Note<
++   "while checking implicit 'delete this' for virtual destructor">;
++ def err_builtin_operator_new_delete_not_usual : Error<
++   "call to '%select{__builtin_operator_new|__builtin_operator_delete}0' "
++   "selects non-usual %select{allocation|deallocation}0 function">;
++ def note_non_usual_function_declared_here : Note<
++   "non-usual %0 declared here">;
++ 
++ // C++ literal operators
++ def err_literal_operator_outside_namespace : Error<
++   "literal operator %0 must be in a namespace or global scope">;
++ def err_literal_operator_id_outside_namespace : Error<
++   "non-namespace scope '%0' cannot have a literal operator member">;
++ def err_literal_operator_default_argument : Error<
++   "literal operator cannot have a default argument">;
++ def err_literal_operator_bad_param_count : Error<
++   "non-template literal operator must have one or two parameters">;
++ def err_literal_operator_invalid_param : Error<
++   "parameter of literal operator must have type 'unsigned long long', 'long double', 'char', 'wchar_t', 'char16_t', 'char32_t', or 'const char *'">;
++ def err_literal_operator_param : Error<
++   "invalid literal operator parameter type %0, did you mean %1?">;
++ def err_literal_operator_template_with_params : Error<
++   "literal operator template cannot have any parameters">;
++ def err_literal_operator_template : Error<
++   "template parameter list for literal operator must be either 'char...' or 'typename T, T...'">;
++ def err_literal_operator_extern_c : Error<
++   "literal operator must have C++ linkage">;
++ def ext_string_literal_operator_template : ExtWarn<
++   "string literal operator templates are a GNU extension">,
++   InGroup<GNUStringLiteralOperatorTemplate>;
++ def warn_user_literal_reserved : Warning<
++   "user-defined literal suffixes not starting with '_' are reserved"
++   "%select{; no literal will invoke this operator|}0">,
++   InGroup<UserDefinedLiterals>;
++ 
++ // C++ conversion functions
++ def err_conv_function_not_member : Error<
++   "conversion function must be a non-static member function">;
++ def err_conv_function_return_type : Error<
++   "conversion function cannot have a return type">;
++ def err_conv_function_with_params : Error<
++   "conversion function cannot have any parameters">;
++ def err_conv_function_variadic : Error<
++   "conversion function cannot be variadic">;
++ def err_conv_function_to_array : Error<
++   "conversion function cannot convert to an array type">;
++ def err_conv_function_to_function : Error<
++   "conversion function cannot convert to a function type">;
++ def err_conv_function_with_complex_decl : Error<
++   "cannot specify any part of a return type in the "
++   "declaration of a conversion function"
++   "%select{"
++   "; put the complete type after 'operator'|"
++   "; use a typedef to declare a conversion to %1|"
++   "; use an alias template to declare a conversion to %1|"
++   "}0">;
++ def err_conv_function_redeclared : Error<
++   "conversion function cannot be redeclared">;
++ def warn_conv_to_self_not_used : Warning<
++   "conversion function converting %0 to itself will never be used">,
++   InGroup<ClassConversion>;
++ def warn_conv_to_base_not_used : Warning<
++   "conversion function converting %0 to its base class %1 will never be used">,
++   InGroup<ClassConversion>;
++ def warn_conv_to_void_not_used : Warning<
++   "conversion function converting %0 to %1 will never be used">,
++   InGroup<ClassConversion>;
++ 
++ def warn_not_compound_assign : Warning<
++   "use of unary operator that may be intended as compound assignment (%0=)">;
++ 
++ // C++11 explicit conversion operators
++ def ext_explicit_conversion_functions : ExtWarn<
++   "explicit conversion functions are a C++11 extension">, InGroup<CXX11>;
++ def warn_cxx98_compat_explicit_conversion_functions : Warning<
++   "explicit conversion functions are incompatible with C++98">,
++   InGroup<CXX98Compat>, DefaultIgnore;
++ 
++ // C++11 defaulted functions
++ def err_defaulted_special_member_params : Error<
++   "an explicitly-defaulted %select{|copy |move }0constructor cannot "
++   "have default arguments">;
++ def err_defaulted_special_member_variadic : Error<
++   "an explicitly-defaulted %select{|copy |move }0constructor cannot "
++   "be variadic">;
++ def err_defaulted_special_member_return_type : Error<
++   "explicitly-defaulted %select{copy|move}0 assignment operator must "
++   "return %1">;
++ def err_defaulted_special_member_quals : Error<
++   "an explicitly-defaulted %select{copy|move}0 assignment operator may not "
++   "have 'const'%select{, 'constexpr'|}1 or 'volatile' qualifiers">;
++ def err_defaulted_special_member_volatile_param : Error<
++   "the parameter for an explicitly-defaulted %sub{select_special_member_kind}0 "
++   "may not be volatile">;
++ def err_defaulted_special_member_move_const_param : Error<
++   "the parameter for an explicitly-defaulted move "
++   "%select{constructor|assignment operator}0 may not be const">;
++ def err_defaulted_special_member_copy_const_param : Error<
++   "the parameter for this explicitly-defaulted copy "
++   "%select{constructor|assignment operator}0 is const, but a member or base "
++   "requires it to be non-const">;
++ def err_defaulted_copy_assign_not_ref : Error<
++   "the parameter for an explicitly-defaulted copy assignment operator must be an "
++   "lvalue reference type">;
++ def err_incorrect_defaulted_constexpr : Error<
++   "defaulted definition of %sub{select_special_member_kind}0 "
++   "is not constexpr">;
++ def err_incorrect_defaulted_consteval : Error<
++   "defaulted declaration of %sub{select_special_member_kind}0 "
++   "cannot be consteval because implicit definition is not constexpr">;
++ def warn_defaulted_method_deleted : Warning<
++   "explicitly defaulted %sub{select_special_member_kind}0 is implicitly "
++   "deleted">, InGroup<DefaultedFunctionDeleted>;
++ def err_out_of_line_default_deletes : Error<
++   "defaulting this %sub{select_special_member_kind}0 "
++   "would delete it after its first declaration">;
++ def note_deleted_type_mismatch : Note<
++   "function is implicitly deleted because its declared type does not match "
++   "the type of an implicit %sub{select_special_member_kind}0">;
++ def warn_cxx17_compat_defaulted_method_type_mismatch : Warning<
++   "explicitly defaulting this %sub{select_special_member_kind}0 with a type "
++   "different from the implicit type is incompatible with C++ standards before "
++   "C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ def warn_vbase_moved_multiple_times : Warning<
++   "defaulted move assignment operator of %0 will move assign virtual base "
++   "class %1 multiple times">, InGroup<DiagGroup<"multiple-move-vbase">>;
++ def note_vbase_moved_here : Note<
++   "%select{%1 is a virtual base class of base class %2 declared here|"
++   "virtual base class %1 declared here}0">;
++ 
++ // C++20 defaulted comparisons
++ // This corresponds to values of Sema::DefaultedComparisonKind.
++ def select_defaulted_comparison_kind : TextSubstitution<
++   "%select{<ERROR>|equality|three-way|equality|relational}0 comparison "
++   "operator">;
++ def ext_defaulted_comparison : ExtWarn<
++   "defaulted comparison operators are a C++20 extension">, InGroup<CXX20>;
++ def warn_cxx17_compat_defaulted_comparison : Warning<
++   "defaulted comparison operators are incompatible with C++ standards "
++   "before C++20">, InGroup<CXXPre20Compat>, DefaultIgnore;
++ def err_defaulted_comparison_template : Error<
++   "comparison operator template cannot be defaulted">;
++ def err_defaulted_comparison_out_of_class : Error<
++   "%sub{select_defaulted_comparison_kind}0 can only be defaulted in a class "
++   "definition">;
++ def err_defaulted_comparison_param : Error<
++   "invalid parameter type for defaulted %sub{select_defaulted_comparison_kind}0"
++   "; found %1, expected %2%select{| or %4}3">;
++ def err_defaulted_comparison_param_mismatch : Error<
++   "parameters for defaulted %sub{select_defaulted_comparison_kind}0 "
++   "must have the same type%diff{ (found $ vs $)|}1,2">;
++ def err_defaulted_comparison_non_const : Error<
++   "defaulted member %sub{select_defaulted_comparison_kind}0 must be "
++   "const-qualified">;
++ def err_defaulted_comparison_return_type_not_bool : Error<
++   "return type for defaulted %sub{select_defaulted_comparison_kind}0 "
++   "must be 'bool', not %1">;
++ def err_defaulted_comparison_deduced_return_type_not_auto : Error<
++   "deduced return type for defaulted %sub{select_defaulted_comparison_kind}0 "
++   "must be 'auto', not %1">;
++ def warn_defaulted_comparison_deleted : Warning<
++   "explicitly defaulted %sub{select_defaulted_comparison_kind}0 is implicitly "
++   "deleted">, InGroup<DefaultedFunctionDeleted>;
++ def err_non_first_default_compare_deletes : Error<
++   "defaulting %select{this %sub{select_defaulted_comparison_kind}1|"
++   "the corresponding implicit 'operator==' for this defaulted 'operator<=>'}0 "
++   "would delete it after its first declaration">;
++ def note_defaulted_comparison_union : Note<
++   "defaulted %0 is implicitly deleted because "
++   "%2 is a %select{union-like class|union}1 with variant members">;
++ def note_defaulted_comparison_reference_member : Note<
++   "defaulted %0 is implicitly deleted because "
++   "class %1 has a reference member">;
++ def note_defaulted_comparison_ambiguous : Note<
++   "defaulted %0 is implicitly deleted because implied %select{|'==' |'<' }1"
++   "comparison %select{|for member %3 |for base class %3 }2is ambiguous">;
++ def note_defaulted_comparison_inaccessible : Note<
++   "defaulted %0 is implicitly deleted because it would invoke a "
++   "%select{private|protected}3 %4%select{ member of %6|"
++   " member of %6 to compare member %2| to compare base class %2}1">;
++ def note_defaulted_comparison_calls_deleted : Note<
++   "defaulted %0 is implicitly deleted because it would invoke a deleted "
++   "comparison function%select{| for member %2| for base class %2}1">;
++ def note_defaulted_comparison_no_viable_function : Note<
++   "defaulted %0 is implicitly deleted because there is no viable "
++   "%select{three-way comparison function|'operator=='}1 for "
++   "%select{|member |base class }2%3">;
++ def note_defaulted_comparison_no_viable_function_synthesized : Note<
++   "three-way comparison cannot be synthesized because there is no viable "
++   "function for %select{'=='|'<'}0 comparison">;
++ def note_defaulted_comparison_not_rewritten_callee : Note<
++   "defaulted %0 is implicitly deleted because this non-rewritten comparison "
++   "function would be the best match for the comparison">;
++ def note_defaulted_comparison_not_rewritten_conversion : Note<
++   "defaulted %0 is implicitly deleted because a builtin comparison function "
++   "using this conversion would be the best match for the comparison">;
++ def note_defaulted_comparison_cannot_deduce : Note<
++   "return type of defaulted 'operator<=>' cannot be deduced because "
++   "return type %2 of three-way comparison for %select{|member|base class}0 %1 "
++   "is not a standard comparison category type">;
++ def err_defaulted_comparison_cannot_deduce_undeduced_auto : Error<
++   "return type of defaulted 'operator<=>' cannot be deduced because "
++   "three-way comparison for %select{|member|base class}0 %1 "
++   "has a deduced return type and is not yet defined">;
++ def note_defaulted_comparison_cannot_deduce_undeduced_auto : Note<
++   "%select{|member|base class}0 %1 declared here">;
++ def note_defaulted_comparison_cannot_deduce_callee : Note<
++   "selected 'operator<=>' for %select{|member|base class}0 %1 declared here">;
++ def err_incorrect_defaulted_comparison_constexpr : Error<
++   "defaulted definition of %select{%sub{select_defaulted_comparison_kind}1|"
++   "three-way comparison operator}0 "
++   "cannot be declared %select{constexpr|consteval}2 because "
++   "%select{it|the corresponding implicit 'operator=='}0 "
++   "invokes a non-constexpr comparison function">;
++ def note_defaulted_comparison_not_constexpr : Note<
++   "non-constexpr comparison function would be used to compare "
++   "%select{|member %1|base class %1}0">;
++ def note_defaulted_comparison_not_constexpr_here : Note<
++   "non-constexpr comparison function declared here">;
++ def note_in_declaration_of_implicit_equality_comparison : Note<
++   "while declaring the corresponding implicit 'operator==' "
++   "for this defaulted 'operator<=>'">;
++ 
++ def ext_implicit_exception_spec_mismatch : ExtWarn<
++   "function previously declared with an %select{explicit|implicit}0 exception "
++   "specification redeclared with an %select{implicit|explicit}0 exception "
++   "specification">, InGroup<DiagGroup<"implicit-exception-spec-mismatch">>;
++ 
++ def warn_ptr_arith_precedes_bounds : Warning<
++   "the pointer decremented by %0 refers before the beginning of the array">,
++   InGroup<ArrayBoundsPointerArithmetic>, DefaultIgnore;
++ def warn_ptr_arith_exceeds_bounds : Warning<
++   "the pointer incremented by %0 refers past the end of the array (that "
++   "contains %1 element%s2)">,
++   InGroup<ArrayBoundsPointerArithmetic>, DefaultIgnore;
++ def warn_array_index_precedes_bounds : Warning<
++   "array index %0 is before the beginning of the array">,
++   InGroup<ArrayBounds>;
++ def warn_array_index_exceeds_bounds : Warning<
++   "array index %0 is past the end of the array (which contains %1 "
++   "element%s2)">, InGroup<ArrayBounds>;
++ def warn_ptr_arith_exceeds_max_addressable_bounds : Warning<
++   "the pointer incremented by %0 refers past the last possible element for an array in %1-bit "
++   "address space containing %2-bit (%3-byte) elements (max possible %4 element%s5)">,
++   InGroup<ArrayBounds>;
++ def warn_array_index_exceeds_max_addressable_bounds : Warning<
++   "array index %0 refers past the last possible element for an array in %1-bit "
++   "address space containing %2-bit (%3-byte) elements (max possible %4 element%s5)">,
++   InGroup<ArrayBounds>;
++ def note_array_declared_here : Note<
++   "array %0 declared here">;
++ 
++ def warn_printf_insufficient_data_args : Warning<
++   "more '%%' conversions than data arguments">, InGroup<FormatInsufficientArgs>;
++ def warn_printf_data_arg_not_used : Warning<
++   "data argument not used by format string">, InGroup<FormatExtraArgs>;
++ def warn_format_invalid_conversion : Warning<
++   "invalid conversion specifier '%0'">, InGroup<FormatInvalidSpecifier>;
++ def warn_printf_incomplete_specifier : Warning<
++   "incomplete format specifier">, InGroup<Format>;
++ def warn_missing_format_string : Warning<
++   "format string missing">, InGroup<Format>;
++ def warn_scanf_nonzero_width : Warning<
++   "zero field width in scanf format string is unused">,
++   InGroup<Format>;
++ def warn_format_conversion_argument_type_mismatch : Warning<
++   "format specifies type %0 but the argument has "
++   "%select{type|underlying type}2 %1">,
++   InGroup<Format>;
++ def warn_format_conversion_argument_type_mismatch_pedantic : Extension<
++   warn_format_conversion_argument_type_mismatch.Text>,
++   InGroup<FormatPedantic>;
++ def warn_format_conversion_argument_type_mismatch_confusion : Warning<
++   warn_format_conversion_argument_type_mismatch.Text>,
++   InGroup<FormatTypeConfusion>, DefaultIgnore;
++ def warn_format_argument_needs_cast : Warning<
++   "%select{values of type|enum values with underlying type}2 '%0' should not "
++   "be used as format arguments; add an explicit cast to %1 instead">,
++   InGroup<Format>;
++ def warn_format_argument_needs_cast_pedantic : Warning<
++   warn_format_argument_needs_cast.Text>,
++   InGroup<FormatPedantic>, DefaultIgnore;
++ def warn_printf_positional_arg_exceeds_data_args : Warning <
++   "data argument position '%0' exceeds the number of data arguments (%1)">,
++   InGroup<Format>;
++ def warn_format_zero_positional_specifier : Warning<
++   "position arguments in format strings start counting at 1 (not 0)">,
++   InGroup<Format>;
++ def warn_format_invalid_positional_specifier : Warning<
++   "invalid position specified for %select{field width|field precision}0">,
++   InGroup<Format>;
++ def warn_format_mix_positional_nonpositional_args : Warning<
++   "cannot mix positional and non-positional arguments in format string">,
++   InGroup<Format>;
++ def warn_static_array_too_small : Warning<
++   "array argument is too small; %select{contains %0 elements|is of size %0}2,"
++   " callee requires at least %1">,
++   InGroup<ArrayBounds>;
++ def note_callee_static_array : Note<
++   "callee declares array parameter as static here">;
++ def warn_empty_format_string : Warning<
++   "format string is empty">, InGroup<FormatZeroLength>;
++ def warn_format_string_is_wide_literal : Warning<
++   "format string should not be a wide string">, InGroup<Format>;
++ def warn_printf_format_string_contains_null_char : Warning<
++   "format string contains '\\0' within the string body">, InGroup<Format>;
++ def warn_printf_format_string_not_null_terminated : Warning<
++   "format string is not null-terminated">, InGroup<Format>;
++ def warn_printf_asterisk_missing_arg : Warning<
++   "'%select{*|.*}0' specified field %select{width|precision}0 is missing a matching 'int' argument">,
++   InGroup<Format>;
++ def warn_printf_asterisk_wrong_type : Warning<
++   "field %select{width|precision}0 should have type %1, but argument has type %2">,
++   InGroup<Format>;
++ def warn_printf_nonsensical_optional_amount: Warning<
++   "%select{field width|precision}0 used with '%1' conversion specifier, resulting in undefined behavior">,
++   InGroup<Format>;
++ def warn_printf_nonsensical_flag: Warning<
++   "flag '%0' results in undefined behavior with '%1' conversion specifier">,
++   InGroup<Format>;
++ def warn_format_nonsensical_length: Warning<
++   "length modifier '%0' results in undefined behavior or no effect with '%1' conversion specifier">,
++   InGroup<Format>;
++ def warn_format_non_standard_positional_arg: Warning<
++   "positional arguments are not supported by ISO C">, InGroup<FormatNonStandard>, DefaultIgnore;
++ def warn_format_non_standard: Warning<
++   "'%0' %select{length modifier|conversion specifier}1 is not supported by ISO C">,
++   InGroup<FormatNonStandard>, DefaultIgnore;
++ def warn_format_non_standard_conversion_spec: Warning<
++   "using length modifier '%0' with conversion specifier '%1' is not supported by ISO C">,
++   InGroup<FormatNonStandard>, DefaultIgnore;
++ def err_invalid_mask_type_size : Error<
++   "mask type size must be between 1-byte and 8-bytes">;
++ def warn_format_invalid_annotation : Warning<
++   "using '%0' format specifier annotation outside of os_log()/os_trace()">,
++   InGroup<Format>;
++ def warn_format_P_no_precision : Warning<
++   "using '%%P' format specifier without precision">,
++   InGroup<Format>;
++ def warn_printf_ignored_flag: Warning<
++   "flag '%0' is ignored when flag '%1' is present">,
++   InGroup<Format>;
++ def warn_printf_empty_objc_flag: Warning<
++   "missing object format flag">,
++   InGroup<Format>;
++ def warn_printf_ObjCflags_without_ObjCConversion: Warning<
++   "object format flags cannot be used with '%0' conversion specifier">,
++   InGroup<Format>;
++ def warn_printf_invalid_objc_flag: Warning<
++     "'%0' is not a valid object format flag">,
++     InGroup<Format>;
++ def warn_scanf_scanlist_incomplete : Warning<
++   "no closing ']' for '%%[' in scanf format string">,
++   InGroup<Format>;
++ def warn_format_bool_as_character : Warning<
++   "using '%0' format specifier, but argument has boolean value">,
++   InGroup<Format>;
++ def note_format_string_defined : Note<"format string is defined here">;
++ def note_format_fix_specifier : Note<"did you mean to use '%0'?">;
++ def note_printf_c_str: Note<"did you mean to call the %0 method?">;
++ def note_format_security_fixit: Note<
++   "treat the string as an argument to avoid this">;
++ 
++ def warn_null_arg : Warning<
++   "null passed to a callee that requires a non-null argument">,
++   InGroup<NonNull>;
++ def warn_null_ret : Warning<
++   "null returned from %select{function|method}0 that requires a non-null return value">,
++   InGroup<NonNull>;
++ 
++ def err_lifetimebound_no_object_param : Error<
++   "'lifetimebound' attribute cannot be applied; %select{static |non-}0member "
++   "function has no implicit object parameter">;
++ def err_lifetimebound_ctor_dtor : Error<
++   "'lifetimebound' attribute cannot be applied to a "
++   "%select{constructor|destructor}0">;
++ 
++ // CHECK: returning address/reference of stack memory
++ def warn_ret_stack_addr_ref : Warning<
++   "%select{address of|reference to}0 stack memory associated with "
++   "%select{local variable|parameter}2 %1 returned">,
++   InGroup<ReturnStackAddress>;
++ def warn_ret_local_temp_addr_ref : Warning<
++   "returning %select{address of|reference to}0 local temporary object">,
++   InGroup<ReturnStackAddress>;
++ def warn_ret_addr_label : Warning<
++   "returning address of label, which is local">,
++   InGroup<ReturnStackAddress>;
++ def err_ret_local_block : Error<
++   "returning block that lives on the local stack">;
++ def note_local_var_initializer : Note<
++   "%select{via initialization of|binding reference}0 variable "
++   "%select{%2 |}1here">;
++ def note_lambda_capture_initializer : Note<
++   "%select{implicitly |}2captured%select{| by reference}3"
++   "%select{%select{ due to use|}2 here|"
++   " via initialization of lambda capture %0}1">;
++ def note_init_with_default_member_initalizer : Note<
++   "initializing field %0 with default member initializer">;
++ 
++ // Check for initializing a member variable with the address or a reference to
++ // a constructor parameter.
++ def warn_bind_ref_member_to_parameter : Warning<
++   "binding reference member %0 to stack allocated "
++   "%select{variable|parameter}2 %1">, InGroup<DanglingField>;
++ def warn_init_ptr_member_to_parameter_addr : Warning<
++   "initializing pointer member %0 with the stack address of "
++   "%select{variable|parameter}2 %1">, InGroup<DanglingField>;
++ def note_ref_or_ptr_member_declared_here : Note<
++   "%select{reference|pointer}0 member declared here">;
++ 
++ def err_dangling_member : Error<
++   "%select{reference|backing array for 'std::initializer_list'}2 "
++   "%select{|subobject of }1member %0 "
++   "%select{binds to|is}2 a temporary object "
++   "whose lifetime would be shorter than the lifetime of "
++   "the constructed object">;
++ def warn_dangling_member : Warning<
++   "%select{reference|backing array for 'std::initializer_list'}2 "
++   "%select{|subobject of }1member %0 "
++   "%select{binds to|is}2 a temporary object "
++   "whose lifetime is shorter than the lifetime of the constructed object">,
++   InGroup<DanglingField>;
++ def warn_dangling_lifetime_pointer_member : Warning<
++   "initializing pointer member %0 to point to a temporary object "
++   "whose lifetime is shorter than the lifetime of the constructed object">,
++   InGroup<DanglingGsl>;
++ def note_lifetime_extending_member_declared_here : Note<
++   "%select{%select{reference|'std::initializer_list'}0 member|"
++   "member with %select{reference|'std::initializer_list'}0 subobject}1 "
++   "declared here">;
++ def warn_dangling_variable : Warning<
++   "%select{temporary %select{whose address is used as value of|"
++   "%select{|implicitly }2bound to}4 "
++   "%select{%select{|reference }4member of local variable|"
++   "local %select{variable|reference}4}1|"
++   "array backing "
++   "%select{initializer list subobject of local variable|"
++   "local initializer list}1}0 "
++   "%select{%3 |}2will be destroyed at the end of the full-expression">,
++   InGroup<Dangling>;
++ def warn_new_dangling_reference : Warning<
++   "temporary bound to reference member of allocated object "
++   "will be destroyed at the end of the full-expression">,
++   InGroup<DanglingField>;
++ def warn_dangling_lifetime_pointer : Warning<
++   "object backing the pointer "
++   "will be destroyed at the end of the full-expression">,
++   InGroup<DanglingGsl>;
++ def warn_new_dangling_initializer_list : Warning<
++   "array backing "
++   "%select{initializer list subobject of the allocated object|"
++   "the allocated initializer list}0 "
++   "will be destroyed at the end of the full-expression">,
++   InGroup<DanglingInitializerList>;
++ def warn_unsupported_lifetime_extension : Warning<
++   "sorry, lifetime extension of "
++   "%select{temporary|backing array of initializer list}0 created "
++   "by aggregate initialization using default member initializer "
++   "is not supported; lifetime of %select{temporary|backing array}0 "
++   "will end at the end of the full-expression">, InGroup<Dangling>;
++ 
++ // For non-floating point, expressions of the form x == x or x != x
++ // should result in a warning, since these always evaluate to a constant.
++ // Array comparisons have similar warnings
++ def warn_comparison_always : Warning<
++   "%select{self-|array }0comparison always evaluates to "
++   "%select{a constant|true|false|'std::strong_ordering::equal'}1">,
++   InGroup<TautologicalCompare>;
++ def warn_comparison_bitwise_always : Warning<
++   "bitwise comparison always evaluates to %select{false|true}0">,
++   InGroup<TautologicalBitwiseCompare>, DefaultIgnore;
++ def warn_comparison_bitwise_or : Warning<
++   "bitwise or with non-zero value always evaluates to true">,
++   InGroup<TautologicalBitwiseCompare>, DefaultIgnore;
++ def warn_tautological_overlap_comparison : Warning<
++   "overlapping comparisons always evaluate to %select{false|true}0">,
++   InGroup<TautologicalOverlapCompare>, DefaultIgnore;
++ def warn_depr_array_comparison : Warning<
++   "comparison between two arrays is deprecated; "
++   "to compare array addresses, use unary '+' to decay operands to pointers">,
++   InGroup<DeprecatedArrayCompare>;
++ 
++ def warn_stringcompare : Warning<
++   "result of comparison against %select{a string literal|@encode}0 is "
++   "unspecified (use an explicit string comparison function instead)">,
++   InGroup<StringCompare>;
++ 
++ def warn_identity_field_assign : Warning<
++   "assigning %select{field|instance variable}0 to itself">,
++   InGroup<SelfAssignmentField>;
++ 
++ // Type safety attributes
++ def err_type_tag_for_datatype_not_ice : Error<
++   "'type_tag_for_datatype' attribute requires the initializer to be "
++   "an %select{integer|integral}0 constant expression">;
++ def err_type_tag_for_datatype_too_large : Error<
++   "'type_tag_for_datatype' attribute requires the initializer to be "
++   "an %select{integer|integral}0 constant expression "
++   "that can be represented by a 64 bit integer">;
++ def err_tag_index_out_of_range : Error<
++   "%select{type tag|argument}0 index %1 is greater than the number of arguments specified">;
++ def warn_type_tag_for_datatype_wrong_kind : Warning<
++   "this type tag was not designed to be used with this function">,
++   InGroup<TypeSafety>;
++ def warn_type_safety_type_mismatch : Warning<
++   "argument type %0 doesn't match specified %1 type tag "
++   "%select{that requires %3|}2">, InGroup<TypeSafety>;
++ def warn_type_safety_null_pointer_required : Warning<
++   "specified %0 type tag requires a null pointer">, InGroup<TypeSafety>;
++ 
++ // Generic selections.
++ def err_assoc_type_incomplete : Error<
++   "type %0 in generic association incomplete">;
++ def err_assoc_type_nonobject : Error<
++   "type %0 in generic association not an object type">;
++ def err_assoc_type_variably_modified : Error<
++   "type %0 in generic association is a variably modified type">;
++ def err_assoc_compatible_types : Error<
++   "type %0 in generic association compatible with previously specified type %1">;
++ def note_compat_assoc : Note<
++   "compatible type %0 specified here">;
++ def err_generic_sel_no_match : Error<
++   "controlling expression type %0 not compatible with any generic association type">;
++ def err_generic_sel_multi_match : Error<
++   "controlling expression type %0 compatible with %1 generic association types">;
++ 
++ 
++ // Blocks
++ def err_blocks_disable : Error<"blocks support disabled - compile with -fblocks"
++   " or %select{pick a deployment target that supports them|for OpenCL 2.0}0">;
++ def err_block_returning_array_function : Error<
++   "block cannot return %select{array|function}0 type %1">;
++ 
++ // Builtin annotation
++ def err_builtin_annotation_first_arg : Error<
++   "first argument to __builtin_annotation must be an integer">;
++ def err_builtin_annotation_second_arg : Error<
++   "second argument to __builtin_annotation must be a non-wide string constant">;
++ def err_msvc_annotation_wide_str : Error<
++   "arguments to __annotation must be wide string constants">;
++ 
++ // CFString checking
++ def err_cfstring_literal_not_string_constant : Error<
++   "CFString literal is not a string constant">;
++ def warn_cfstring_truncated : Warning<
++   "input conversion stopped due to an input byte that does not "
++   "belong to the input codeset UTF-8">,
++   InGroup<DiagGroup<"CFString-literal">>;
++ 
++ // os_log checking
++ // TODO: separate diagnostic for os_trace()
++ def err_os_log_format_not_string_constant : Error<
++   "os_log() format argument is not a string constant">;
++ def err_os_log_argument_too_big : Error<
++   "os_log() argument %0 is too big (%1 bytes, max %2)">;
++ def warn_os_log_format_narg : Error<
++  "os_log() '%%n' format specifier is not allowed">, DefaultError;
++ 
++ // Statements.
++ def err_continue_not_in_loop : Error<
++   "'continue' statement not in loop statement">;
++ def err_break_not_in_loop_or_switch : Error<
++   "'break' statement not in loop or switch statement">;
++ def warn_loop_ctrl_binds_to_inner : Warning<
++   "'%0' is bound to current loop, GCC binds it to the enclosing loop">,
++   InGroup<GccCompat>;
++ def warn_break_binds_to_switch : Warning<
++   "'break' is bound to loop, GCC binds it to switch">,
++   InGroup<GccCompat>;
++ def err_default_not_in_switch : Error<
++   "'default' statement not in switch statement">;
++ def err_case_not_in_switch : Error<"'case' statement not in switch statement">;
++ def warn_bool_switch_condition : Warning<
++   "switch condition has boolean value">, InGroup<SwitchBool>;
++ def warn_case_value_overflow : Warning<
++   "overflow converting case value to switch condition type (%0 to %1)">,
++   InGroup<Switch>;
++ def err_duplicate_case : Error<"duplicate case value '%0'">;
++ def err_duplicate_case_differing_expr : Error<
++   "duplicate case value: '%0' and '%1' both equal '%2'">;
++ def warn_case_empty_range : Warning<"empty case range specified">;
++ def warn_missing_case_for_condition :
++   Warning<"no case matching constant switch condition '%0'">;
++ 
++ def warn_def_missing_case : Warning<"%plural{"
++   "1:enumeration value %1 not explicitly handled in switch|"
++   "2:enumeration values %1 and %2 not explicitly handled in switch|"
++   "3:enumeration values %1, %2, and %3 not explicitly handled in switch|"
++   ":%0 enumeration values not explicitly handled in switch: %1, %2, %3...}0">,
++   InGroup<SwitchEnum>, DefaultIgnore;
++ 
++ def warn_missing_case : Warning<"%plural{"
++   "1:enumeration value %1 not handled in switch|"
++   "2:enumeration values %1 and %2 not handled in switch|"
++   "3:enumeration values %1, %2, and %3 not handled in switch|"
++   ":%0 enumeration values not handled in switch: %1, %2, %3...}0">,
++   InGroup<Switch>;
++ 
++ def warn_unannotated_fallthrough : Warning<
++   "unannotated fall-through between switch labels">,
++   InGroup<ImplicitFallthrough>, DefaultIgnore;
++ def warn_unannotated_fallthrough_per_function : Warning<
++   "unannotated fall-through between switch labels in partly-annotated "
++   "function">, InGroup<ImplicitFallthroughPerFunction>, DefaultIgnore;
++ def note_insert_fallthrough_fixit : Note<
++   "insert '%0;' to silence this warning">;
++ def note_insert_break_fixit : Note<
++   "insert 'break;' to avoid fall-through">;
++ def err_fallthrough_attr_wrong_target : Error<
++   "%0 attribute is only allowed on empty statements">;
++ def note_fallthrough_insert_semi_fixit : Note<"did you forget ';'?">;
++ def err_fallthrough_attr_outside_switch : Error<
++   "fallthrough annotation is outside switch statement">;
++ def err_fallthrough_attr_invalid_placement : Error<
++   "fallthrough annotation does not directly precede switch label">;
++ 
++ def warn_unreachable_default : Warning<
++   "default label in switch which covers all enumeration values">,
++   InGroup<CoveredSwitchDefault>, DefaultIgnore;
++ def warn_not_in_enum : Warning<"case value not in enumerated type %0">,
++   InGroup<Switch>;
++ def warn_not_in_enum_assignment : Warning<"integer constant not in range "
++   "of enumerated type %0">, InGroup<DiagGroup<"assign-enum">>, DefaultIgnore;
++ def err_typecheck_statement_requires_scalar : Error<
++   "statement requires expression of scalar type (%0 invalid)">;
++ def err_typecheck_statement_requires_integer : Error<
++   "statement requires expression of integer type (%0 invalid)">;
++ def err_multiple_default_labels_defined : Error<
++   "multiple default labels in one switch">;
++ def err_switch_multiple_conversions : Error<
++   "multiple conversions from switch condition type %0 to an integral or "
++   "enumeration type">;
++ def note_switch_conversion : Note<
++   "conversion to %select{integral|enumeration}0 type %1">;
++ def err_switch_explicit_conversion : Error<
++   "switch condition type %0 requires explicit conversion to %1">;
++ def err_switch_incomplete_class_type : Error<
++   "switch condition has incomplete class type %0">;
++ 
++ def warn_empty_if_body : Warning<
++   "if statement has empty body">, InGroup<EmptyBody>;
++ def warn_empty_for_body : Warning<
++   "for loop has empty body">, InGroup<EmptyBody>;
++ def warn_empty_range_based_for_body : Warning<
++   "range-based for loop has empty body">, InGroup<EmptyBody>;
++ def warn_empty_while_body : Warning<
++   "while loop has empty body">, InGroup<EmptyBody>;
++ def warn_empty_switch_body : Warning<
++   "switch statement has empty body">, InGroup<EmptyBody>;
++ def note_empty_body_on_separate_line : Note<
++   "put the semicolon on a separate line to silence this warning">;
++ 
++ def err_va_start_captured_stmt : Error<
++   "'va_start' cannot be used in a captured statement">;
++ def err_va_start_outside_function : Error<
++   "'va_start' cannot be used outside a function">;
++ def err_va_start_fixed_function : Error<
++   "'va_start' used in function with fixed args">;
++ def err_va_start_used_in_wrong_abi_function : Error<
++   "'va_start' used in %select{System V|Win64}0 ABI function">;
++ def err_ms_va_start_used_in_sysv_function : Error<
++   "'__builtin_ms_va_start' used in System V ABI function">;
++ def warn_second_arg_of_va_start_not_last_named_param : Warning<
++   "second argument to 'va_start' is not the last named parameter">,
++   InGroup<Varargs>;
++ def warn_va_start_type_is_undefined : Warning<
++   "passing %select{an object that undergoes default argument promotion|"
++   "an object of reference type|a parameter declared with the 'register' "
++   "keyword}0 to 'va_start' has undefined behavior">, InGroup<Varargs>;
++ def err_first_argument_to_va_arg_not_of_type_va_list : Error<
++   "first argument to 'va_arg' is of type %0 and not 'va_list'">;
++ def err_second_parameter_to_va_arg_incomplete: Error<
++   "second argument to 'va_arg' is of incomplete type %0">;
++ def err_second_parameter_to_va_arg_abstract: Error<
++   "second argument to 'va_arg' is of abstract type %0">;
++ def warn_second_parameter_to_va_arg_not_pod : Warning<
++   "second argument to 'va_arg' is of non-POD type %0">,
++   InGroup<NonPODVarargs>, DefaultError;
++ def warn_second_parameter_to_va_arg_ownership_qualified : Warning<
++   "second argument to 'va_arg' is of ARC ownership-qualified type %0">,
++   InGroup<NonPODVarargs>, DefaultError;
++ def warn_second_parameter_to_va_arg_never_compatible : Warning<
++   "second argument to 'va_arg' is of promotable type %0; this va_arg has "
++   "undefined behavior because arguments will be promoted to %1">, InGroup<Varargs>;
++ 
++ def warn_return_missing_expr : Warning<
++   "non-void %select{function|method}1 %0 should return a value">, DefaultError,
++   InGroup<ReturnType>;
++ def ext_return_missing_expr : ExtWarn<
++   "non-void %select{function|method}1 %0 should return a value">, DefaultError,
++   InGroup<ReturnType>;
++ def ext_return_has_expr : ExtWarn<
++   "%select{void function|void method|constructor|destructor}1 %0 "
++   "should not return a value">,
++   DefaultError, InGroup<ReturnType>;
++ def ext_return_has_void_expr : Extension<
++   "void %select{function|method|block}1 %0 should not return void expression">;
++ def err_return_init_list : Error<
++   "%select{void function|void method|constructor|destructor}1 %0 "
++   "must not return a value">;
++ def err_ctor_dtor_returns_void : Error<
++   "%select{constructor|destructor}1 %0 must not return void expression">;
++ def warn_noreturn_function_has_return_expr : Warning<
++   "function %0 declared 'noreturn' should not return">,
++   InGroup<InvalidNoreturn>;
++ def warn_falloff_noreturn_function : Warning<
++   "function declared 'noreturn' should not return">,
++   InGroup<InvalidNoreturn>;
++ def err_noreturn_block_has_return_expr : Error<
++   "block declared 'noreturn' should not return">;
++ def err_carries_dependency_missing_on_first_decl : Error<
++   "%select{function|parameter}0 declared '[[carries_dependency]]' "
++   "after its first declaration">;
++ def note_carries_dependency_missing_first_decl : Note<
++   "declaration missing '[[carries_dependency]]' attribute is here">;
++ def err_carries_dependency_param_not_function_decl : Error<
++   "'[[carries_dependency]]' attribute only allowed on parameter in a function "
++   "declaration or lambda">;
++ def err_block_on_nonlocal : Error<
++   "__block attribute not allowed, only allowed on local variables">;
++ def err_block_on_vm : Error<
++   "__block attribute not allowed on declaration with a variably modified type">;
++ def err_sizeless_nonlocal : Error<
++   "non-local variable with sizeless type %0">;
++ 
++ def err_vec_builtin_non_vector : Error<
++  "first two arguments to %0 must be vectors">;
++ def err_vec_builtin_incompatible_vector : Error<
++   "first two arguments to %0 must have the same type">;
++ def err_vsx_builtin_nonconstant_argument : Error<
++   "argument %0 to %1 must be a 2-bit unsigned literal (i.e. 0, 1, 2 or 3)">;
++ 
++ def err_shufflevector_nonconstant_argument : Error<
++   "index for __builtin_shufflevector must be a constant integer">;
++ def err_shufflevector_argument_too_large : Error<
++   "index for __builtin_shufflevector must be less than the total number "
++   "of vector elements">;
++ 
++ def err_convertvector_non_vector : Error<
++   "first argument to __builtin_convertvector must be a vector">;
++ def err_convertvector_non_vector_type : Error<
++   "second argument to __builtin_convertvector must be a vector type">;
++ def err_convertvector_incompatible_vector : Error<
++   "first two arguments to __builtin_convertvector must have the same number of elements">;
++ 
++ def err_first_argument_to_cwsc_not_call : Error<
++   "first argument to __builtin_call_with_static_chain must be a non-member call expression">;
++ def err_first_argument_to_cwsc_block_call : Error<
++   "first argument to __builtin_call_with_static_chain must not be a block call">;
++ def err_first_argument_to_cwsc_builtin_call : Error<
++   "first argument to __builtin_call_with_static_chain must not be a builtin call">;
++ def err_first_argument_to_cwsc_pdtor_call : Error<
++   "first argument to __builtin_call_with_static_chain must not be a pseudo-destructor call">;
++ def err_second_argument_to_cwsc_not_pointer : Error<
++   "second argument to __builtin_call_with_static_chain must be of pointer type">;
++ 
++ def err_vector_incorrect_num_initializers : Error<
++   "%select{too many|too few}0 elements in vector initialization (expected %1 elements, have %2)">;
++ def err_altivec_empty_initializer : Error<"expected initializer">;
++ 
++ def err_invalid_neon_type_code : Error<
++   "incompatible constant for this __builtin_neon function">;
++ def err_argument_invalid_range : Error<
++   "argument value %0 is outside the valid range [%1, %2]">;
++ def warn_argument_invalid_range : Warning<
++   "argument value %0 is outside the valid range [%1, %2]">, DefaultError,
++   InGroup<DiagGroup<"argument-outside-range">>;
++ def warn_argument_undefined_behaviour : Warning<
++   "argument value %0 will result in undefined behaviour">,
++   InGroup<DiagGroup<"argument-undefined-behaviour">>;
++ def err_argument_not_multiple : Error<
++   "argument should be a multiple of %0">;
++ def err_argument_not_power_of_2 : Error<
++   "argument should be a power of 2">;
++ def err_argument_not_shifted_byte : Error<
++   "argument should be an 8-bit value shifted by a multiple of 8 bits">;
++ def err_argument_not_shifted_byte_or_xxff : Error<
++   "argument should be an 8-bit value shifted by a multiple of 8 bits, or in the form 0x??FF">;
++ def err_argument_not_contiguous_bit_field : Error<
++   "argument %0 value should represent a contiguous bit field">;
++ def err_rotation_argument_to_cadd
++     : Error<"argument should be the value 90 or 270">;
++ def err_rotation_argument_to_cmla
++     : Error<"argument should be the value 0, 90, 180 or 270">;
++ def warn_neon_vector_initializer_non_portable : Warning<
++   "vector initializers are not compatible with NEON intrinsics in big endian "
++   "mode">, InGroup<DiagGroup<"nonportable-vector-initialization">>;
++ def note_neon_vector_initializer_non_portable : Note<
++   "consider using vld1_%0%1() to initialize a vector from memory, or "
++   "vcreate_%0%1() to initialize from an integer constant">;
++ def note_neon_vector_initializer_non_portable_q : Note<
++   "consider using vld1q_%0%1() to initialize a vector from memory, or "
++   "vcombine_%0%1(vcreate_%0%1(), vcreate_%0%1()) to initialize from integer "
++   "constants">;
++ def err_systemz_invalid_tabort_code : Error<
++   "invalid transaction abort code">;
++ def err_64_bit_builtin_32_bit_tgt : Error<
++   "this builtin is only available on 64-bit targets">;
++ def err_32_bit_builtin_64_bit_tgt : Error<
++   "this builtin is only available on 32-bit targets">;
++ def err_builtin_x64_aarch64_only : Error<
++   "this builtin is only available on x86-64 and aarch64 targets">;
++ def err_mips_builtin_requires_dsp : Error<
++   "this builtin requires 'dsp' ASE, please use -mdsp">;
++ def err_mips_builtin_requires_dspr2 : Error<
++   "this builtin requires 'dsp r2' ASE, please use -mdspr2">;
++ def err_mips_builtin_requires_msa : Error<
++   "this builtin requires 'msa' ASE, please use -mmsa">;
++ def err_ppc_builtin_only_on_arch : Error<
++   "this builtin is only valid on POWER%0 or later CPUs">;
++ def err_ppc_invalid_use_mma_type : Error<
++   "invalid use of PPC MMA type">;
++ def err_x86_builtin_invalid_rounding : Error<
++   "invalid rounding argument">;
++ def err_x86_builtin_invalid_scale : Error<
++   "scale argument must be 1, 2, 4, or 8">;
++ def err_x86_builtin_tile_arg_duplicate : Error<
++   "tile arguments must refer to different tiles">;
++ 
++ def err_builtin_target_unsupported : Error<
++   "builtin is not supported on this target">;
++ def err_builtin_longjmp_unsupported : Error<
++   "__builtin_longjmp is not supported for the current target">;
++ def err_builtin_setjmp_unsupported : Error<
++   "__builtin_setjmp is not supported for the current target">;
++ 
++ def err_builtin_longjmp_invalid_val : Error<
++   "argument to __builtin_longjmp must be a constant 1">;
++ def err_builtin_requires_language : Error<"'%0' is only available in %1">;
++ 
++ def err_constant_integer_arg_type : Error<
++   "argument to %0 must be a constant integer">;
++ 
++ def ext_mixed_decls_code : Extension<
++   "ISO C90 forbids mixing declarations and code">,
++   InGroup<DiagGroup<"declaration-after-statement">>;
++ 
++ def err_non_local_variable_decl_in_for : Error<
++   "declaration of non-local variable in 'for' loop">;
++ def err_non_variable_decl_in_for : Error<
++   "non-variable declaration in 'for' loop">;
++ def err_toomany_element_decls : Error<
++   "only one element declaration is allowed">;
++ def err_selector_element_not_lvalue : Error<
++   "selector element is not a valid lvalue">;
++ def err_selector_element_type : Error<
++   "selector element type %0 is not a valid object">;
++ def err_selector_element_const_type : Error<
++   "selector element of type %0 cannot be a constant lvalue expression">;
++ def err_collection_expr_type : Error<
++   "the type %0 is not a pointer to a fast-enumerable object">;
++ def warn_collection_expr_type : Warning<
++   "collection expression type %0 may not respond to %1">;
++ 
++ def err_invalid_conversion_between_ext_vectors : Error<
++   "invalid conversion between ext-vector type %0 and %1">;
++ 
++ def warn_duplicate_attribute_exact : Warning<
++   "attribute %0 is already applied">, InGroup<IgnoredAttributes>;
++ 
++ def warn_duplicate_attribute : Warning<
++   "attribute %0 is already applied with different arguments">,
++   InGroup<IgnoredAttributes>;
++ 
++ def warn_sync_fetch_and_nand_semantics_change : Warning<
++   "the semantics of this intrinsic changed with GCC "
++   "version 4.4 - the newer semantics are provided here">,
++   InGroup<DiagGroup<"sync-fetch-and-nand-semantics-changed">>;
++ 
++ // Type
++ def ext_wchar_t_sign_spec : ExtWarn<"'%0' cannot be signed or unsigned">,
++   InGroup<DiagGroup<"signed-unsigned-wchar">>, DefaultError;
++ def warn_receiver_forward_class : Warning<
++   "receiver %0 is a forward class and corresponding @interface may not exist">,
++   InGroup<ForwardClassReceiver>;
++ def note_method_sent_forward_class : Note<"method %0 is used for the forward class">;
++ def ext_missing_declspec : ExtWarn<
++   "declaration specifier missing, defaulting to 'int'">;
++ def ext_missing_type_specifier : ExtWarn<
++   "type specifier missing, defaults to 'int'">,
++   InGroup<ImplicitInt>;
++ def err_decimal_unsupported : Error<
++   "GNU decimal type extension not supported">;
++ def err_missing_type_specifier : Error<
++   "C++ requires a type specifier for all declarations">;
++ def err_objc_array_of_interfaces : Error<
++   "array of interface %0 is invalid (probably should be an array of pointers)">;
++ def ext_c99_array_usage : Extension<
++   "%select{qualifier in |static |}0array size %select{||'[*] '}0is a C99 "
++   "feature">, InGroup<C99>;
++ def err_c99_array_usage_cxx : Error<
++   "%select{qualifier in |static |}0array size %select{||'[*] '}0is a C99 "
++   "feature, not permitted in C++">;
++ def err_type_unsupported : Error<
++   "%0 is not supported on this target">;
++ def err_nsconsumed_attribute_mismatch : Error<
++   "overriding method has mismatched ns_consumed attribute on its"
++   " parameter">;
++ def err_nsreturns_retained_attribute_mismatch : Error<
++   "overriding method has mismatched ns_returns_%select{not_retained|retained}0"
++   " attributes">;
++ def err_nserrordomain_invalid_decl : Error<
++   "domain argument %select{|%1 }0does not refer to global constant">;
++ def err_nserrordomain_wrong_type : Error<
++   "domain argument %0 does not point to an NSString or CFString constant">;
++ 
++ def warn_nsconsumed_attribute_mismatch : Warning<
++   err_nsconsumed_attribute_mismatch.Text>, InGroup<NSConsumedMismatch>;
++ def warn_nsreturns_retained_attribute_mismatch : Warning<
++   err_nsreturns_retained_attribute_mismatch.Text>, InGroup<NSReturnsMismatch>;
++ 
++ def note_getter_unavailable : Note<
++   "or because setter is declared here, but no getter method %0 is found">;
++ def err_invalid_protocol_qualifiers : Error<
++   "invalid protocol qualifiers on non-ObjC type">;
++ def warn_ivar_use_hidden : Warning<
++   "local declaration of %0 hides instance variable">,
++    InGroup<ShadowIvar>;
++ def warn_direct_initialize_call : Warning<
++   "explicit call to +initialize results in duplicate call to +initialize">,
++    InGroup<ExplicitInitializeCall>;
++ def warn_direct_super_initialize_call : Warning<
++   "explicit call to [super initialize] should only be in implementation "
++   "of +initialize">,
++    InGroup<ExplicitInitializeCall>;
++ def err_ivar_use_in_class_method : Error<
++   "instance variable %0 accessed in class method">;
++ def err_private_ivar_access : Error<"instance variable %0 is private">,
++   AccessControl;
++ def err_protected_ivar_access : Error<"instance variable %0 is protected">,
++   AccessControl;
++ def warn_maynot_respond : Warning<"%0 may not respond to %1">;
++ def ext_typecheck_base_super : Warning<
++   "method parameter type "
++   "%diff{$ does not match super class method parameter type $|"
++   "does not match super class method parameter type}0,1">,
++    InGroup<SuperSubClassMismatch>, DefaultIgnore;
++ def warn_missing_method_return_type : Warning<
++   "method has no return type specified; defaults to 'id'">,
++   InGroup<MissingMethodReturnType>, DefaultIgnore;
++ def warn_direct_ivar_access : Warning<"instance variable %0 is being "
++   "directly accessed">, InGroup<DiagGroup<"direct-ivar-access">>, DefaultIgnore;
++ 
++ // Spell-checking diagnostics
++ def err_unknown_typename : Error<
++   "unknown type name %0">;
++ def err_unknown_type_or_class_name_suggest : Error<
++   "unknown %select{type|class}1 name %0; did you mean %2?">;
++ def err_unknown_typename_suggest : Error<
++   "unknown type name %0; did you mean %1?">;
++ def err_unknown_nested_typename_suggest : Error<
++   "no type named %0 in %1; did you mean %select{|simply }2%3?">;
++ def err_no_member_suggest : Error<"no member named %0 in %1; did you mean %select{|simply }2%3?">;
++ def err_undeclared_use_suggest : Error<
++   "use of undeclared %0; did you mean %1?">;
++ def err_undeclared_var_use_suggest : Error<
++   "use of undeclared identifier %0; did you mean %1?">;
++ def err_no_template : Error<"no template named %0">;
++ def err_no_template_suggest : Error<"no template named %0; did you mean %1?">;
++ def err_no_member_template : Error<"no template named %0 in %1">;
++ def err_no_member_template_suggest : Error<
++   "no template named %0 in %1; did you mean %select{|simply }2%3?">;
++ def err_non_template_in_template_id : Error<
++   "%0 does not name a template but is followed by template arguments">;
++ def err_non_template_in_template_id_suggest : Error<
++   "%0 does not name a template but is followed by template arguments; "
++   "did you mean %1?">;
++ def err_non_template_in_member_template_id_suggest : Error<
++   "member %0 of %1 is not a template; did you mean %select{|simply }2%3?">;
++ def note_non_template_in_template_id_found : Note<
++   "non-template declaration found by name lookup">;
++ def err_mem_init_not_member_or_class_suggest : Error<
++   "initializer %0 does not name a non-static data member or base "
++   "class; did you mean the %select{base class|member}1 %2?">;
++ def err_field_designator_unknown_suggest : Error<
++   "field designator %0 does not refer to any field in type %1; did you mean "
++   "%2?">;
++ def err_typecheck_member_reference_ivar_suggest : Error<
++   "%0 does not have a member named %1; did you mean %2?">;
++ def err_property_not_found_suggest : Error<
++   "property %0 not found on object of type %1; did you mean %2?">;
++ def err_class_property_found : Error<
++   "property %0 is a class property; did you mean to access it with class '%1'?">;
++ def err_ivar_access_using_property_syntax_suggest : Error<
++   "property %0 not found on object of type %1; did you mean to access instance variable %2?">;
++ def warn_property_access_suggest : Warning<
++ "property %0 not found on object of type %1; did you mean to access property %2?">,
++ InGroup<PropertyAccessDotSyntax>;
++ def err_property_found_suggest : Error<
++   "property %0 found on object of type %1; did you mean to access "
++   "it with the \".\" operator?">;
++ def err_undef_interface_suggest : Error<
++   "cannot find interface declaration for %0; did you mean %1?">;
++ def warn_undef_interface_suggest : Warning<
++   "cannot find interface declaration for %0; did you mean %1?">;
++ def err_undef_superclass_suggest : Error<
++   "cannot find interface declaration for %0, superclass of %1; did you mean "
++   "%2?">;
++ def err_undeclared_protocol_suggest : Error<
++   "cannot find protocol declaration for %0; did you mean %1?">;
++ def note_base_class_specified_here : Note<
++   "base class %0 specified here">;
++ def err_using_directive_suggest : Error<
++   "no namespace named %0; did you mean %1?">;
++ def err_using_directive_member_suggest : Error<
++   "no namespace named %0 in %1; did you mean %select{|simply }2%3?">;
++ def note_namespace_defined_here : Note<"namespace %0 defined here">;
++ def err_sizeof_pack_no_pack_name_suggest : Error<
++   "%0 does not refer to the name of a parameter pack; did you mean %1?">;
++ def note_parameter_pack_here : Note<"parameter pack %0 declared here">;
++ 
++ def err_uncasted_use_of_unknown_any : Error<
++   "%0 has unknown type; cast it to its declared type to use it">;
++ def err_uncasted_call_of_unknown_any : Error<
++   "%0 has unknown return type; cast the call to its declared return type">;
++ def err_uncasted_send_to_unknown_any_method : Error<
++   "no known method %select{%objcinstance1|%objcclass1}0; cast the "
++   "message send to the method's return type">;
++ def err_unsupported_unknown_any_decl : Error<
++   "%0 has unknown type, which is not supported for this kind of declaration">;
++ def err_unsupported_unknown_any_expr : Error<
++   "unsupported expression with unknown type">;
++ def err_unsupported_unknown_any_call : Error<
++   "call to unsupported expression with unknown type">;
++ def err_unknown_any_addrof : Error<
++   "the address of a declaration with unknown type "
++   "can only be cast to a pointer type">;
++ def err_unknown_any_addrof_call : Error<
++   "address-of operator cannot be applied to a call to a function with "
++   "unknown return type">;
++ def err_unknown_any_var_function_type : Error<
++   "variable %0 with unknown type cannot be given a function type">;
++ def err_unknown_any_function : Error<
++   "function %0 with unknown type must be given a function type">;
++ 
++ def err_filter_expression_integral : Error<
++   "filter expression has non-integral type %0">;
++ 
++ def err_non_asm_stmt_in_naked_function : Error<
++   "non-ASM statement in naked function is not supported">;
++ def err_asm_naked_this_ref : Error<
++   "'this' pointer references not allowed in naked functions">;
++ def err_asm_naked_parm_ref : Error<
++   "parameter references not allowed in naked functions">;
++ 
++ // OpenCL warnings and errors.
++ def err_invalid_astype_of_different_size : Error<
++   "invalid reinterpretation: sizes of %0 and %1 must match">;
++ def err_static_kernel : Error<
++   "kernel functions cannot be declared static">;
++ def err_method_kernel : Error<
++   "kernel functions cannot be class members">;
++ def err_template_kernel : Error<
++   "kernel functions cannot be used in a template declaration, instantiation or specialization">;
++ def err_opencl_ptrptr_kernel_param : Error<
++   "kernel parameter cannot be declared as a pointer to a pointer">;
++ def err_kernel_arg_address_space : Error<
++   "pointer arguments to kernel functions must reside in '__global', "
++   "'__constant' or '__local' address space">;
++ def err_opencl_ext_vector_component_invalid_length : Error<
++   "vector component access has invalid length %0.  Supported: 1,2,3,4,8,16.">;
++ def err_opencl_function_variable : Error<
++   "%select{non-kernel function|function scope}0 variable cannot be declared in %1 address space">;
++ def err_opencl_addrspace_scope : Error<
++   "variables in the %0 address space can only be declared in the outermost "
++   "scope of a kernel function">;
++ def err_static_function_scope : Error<
++   "variables in function scope cannot be declared static">;
++ def err_opencl_bitfields : Error<
++   "bit-fields are not supported in OpenCL">;
++ def err_opencl_vla : Error<
++   "variable length arrays are not supported in OpenCL">;
++ def err_opencl_scalar_type_rank_greater_than_vector_type : Error<
++     "scalar operand type has greater rank than the type of the vector "
++     "element. (%0 and %1)">;
++ def err_bad_kernel_param_type : Error<
++   "%0 cannot be used as the type of a kernel parameter">;
++ def err_opencl_implicit_function_decl : Error<
++   "implicit declaration of function %0 is invalid in OpenCL">;
++ def err_record_with_pointers_kernel_param : Error<
++   "%select{struct|union}0 kernel parameters may not contain pointers">;
++ def note_within_field_of_type : Note<
++   "within field of type %0 declared here">;
++ def note_illegal_field_declared_here : Note<
++   "field of illegal %select{type|pointer type}0 %1 declared here">;
++ def err_opencl_type_struct_or_union_field : Error<
++   "the %0 type cannot be used to declare a structure or union field">;
++ def err_event_t_addr_space_qual : Error<
++   "the event_t type can only be used with __private address space qualifier">;
++ def err_expected_kernel_void_return_type : Error<
++   "kernel must have void return type">;
++ def err_sampler_initializer_not_integer : Error<
++   "sampler_t initialization requires 32-bit integer, not %0">;
++ def warn_sampler_initializer_invalid_bits : Warning<
++   "sampler initializer has invalid %0 bits">, InGroup<SpirCompat>, DefaultIgnore;
++ def err_sampler_argument_required : Error<
++   "sampler_t variable required - got %0">;
++ def err_wrong_sampler_addressspace: Error<
++   "sampler type cannot be used with the __local and __global address space qualifiers">;
++ def err_opencl_nonconst_global_sampler : Error<
++   "global sampler requires a const or constant address space qualifier">;
++ def err_opencl_cast_non_zero_to_event_t : Error<
++   "cannot cast non-zero value '%0' to 'event_t'">;
++ def err_opencl_global_invalid_addr_space : Error<
++   "%select{program scope|static local|extern}0 variable must reside in %1 address space">;
++ def err_missing_actual_pipe_type : Error<
++   "missing actual type specifier for pipe">;
++ def err_reference_pipe_type : Error <
++   "pipes packet types cannot be of reference type">;
++ def err_opencl_no_main : Error<"%select{function|kernel}0 cannot be called 'main'">;
++ def err_opencl_kernel_attr :
++   Error<"attribute %0 can only be applied to an OpenCL kernel function">;
++ def err_opencl_return_value_with_address_space : Error<
++   "return value cannot be qualified with address space">;
++ def err_opencl_constant_no_init : Error<
++   "variable in constant address space must be initialized">;
++ def err_opencl_atomic_init: Error<
++   "atomic variable can be %select{assigned|initialized}0 to a variable only "
++   "in global address space">;
++ def err_opencl_implicit_vector_conversion : Error<
++   "implicit conversions between vector types (%0 and %1) are not permitted">;
++ def err_opencl_invalid_type_array : Error<
++   "array of %0 type is invalid in OpenCL">;
++ def err_opencl_ternary_with_block : Error<
++   "block type cannot be used as expression in ternary expression in OpenCL">;
++ def err_opencl_pointer_to_type : Error<
++   "pointer to type %0 is invalid in OpenCL">;
++ def err_opencl_type_can_only_be_used_as_function_parameter : Error <
++   "type %0 can only be used as a function parameter in OpenCL">;
++ def err_opencl_type_not_found : Error<
++   "%0 type %1 not found; include the base header with -finclude-default-header">;
++ def warn_opencl_attr_deprecated_ignored : Warning <
++   "%0 attribute is deprecated and ignored in %1">, InGroup<IgnoredAttributes>;
++ def err_opencl_variadic_function : Error<
++   "invalid prototype, variadic arguments are not allowed in OpenCL">;
++ def err_opencl_requires_extension : Error<
++   "use of %select{type|declaration}0 %1 requires %2 support">;
++ def ext_opencl_double_without_pragma : Extension<
++   "Clang permits use of type 'double' regardless pragma if 'cl_khr_fp64' is"
++   " supported">;
++ def warn_opencl_generic_address_space_arg : Warning<
++   "passing non-generic address space pointer to %0"
++   " may cause dynamic conversion affecting performance">,
++   InGroup<Conversion>, DefaultIgnore;
++ 
++ // OpenCL v2.0 s6.13.6 -- Builtin Pipe Functions
++ def err_opencl_builtin_pipe_first_arg : Error<
++   "first argument to %0 must be a pipe type">;
++ def err_opencl_builtin_pipe_arg_num : Error<
++   "invalid number of arguments to function: %0">;
++ def err_opencl_builtin_pipe_invalid_arg : Error<
++   "invalid argument type to function %0 (expecting %1 having %2)">;
++ def err_opencl_builtin_pipe_invalid_access_modifier : Error<
++   "invalid pipe access modifier (expecting %0)">;
++ 
++ // OpenCL access qualifier
++ def err_opencl_invalid_access_qualifier : Error<
++   "access qualifier can only be used for pipe and image type">;
++ def err_opencl_invalid_read_write : Error<
++   "access qualifier %0 can not be used for %1 %select{|prior to OpenCL C version 2.0 or in version 3.0 "
++   "and without __opencl_c_read_write_images feature}2">;
++ def err_opencl_multiple_access_qualifiers : Error<
++   "multiple access qualifiers">;
++ def note_opencl_typedef_access_qualifier : Note<
++   "previously declared '%0' here">;
++ 
++ // OpenCL v2.0 s6.12.5 Blocks restrictions
++ def err_opencl_block_storage_type : Error<
++   "the __block storage type is not permitted">;
++ def err_opencl_invalid_block_declaration : Error<
++   "invalid block variable declaration - must be %select{const qualified|initialized}0">;
++ def err_opencl_extern_block_declaration : Error<
++   "invalid block variable declaration - using 'extern' storage class is disallowed">;
++ def err_opencl_block_ref_block : Error<
++   "cannot refer to a block inside block">;
++ 
++ // OpenCL v2.0 s6.13.9 - Address space qualifier functions.
++ def err_opencl_builtin_to_addr_invalid_arg : Error<
++   "invalid argument %0 to function: %1, expecting a generic pointer argument">;
++ 
++ // OpenCL v2.0 s6.13.17 Enqueue kernel restrictions.
++ def err_opencl_enqueue_kernel_incorrect_args : Error<
++   "illegal call to enqueue_kernel, incorrect argument types">;
++ def err_opencl_enqueue_kernel_local_size_args : Error<
++   "mismatch in number of block parameters and local size arguments passed">;
++ def err_opencl_enqueue_kernel_invalid_local_size_type : Error<
++   "illegal call to enqueue_kernel, parameter needs to be specified as integer type">;
++ def err_opencl_enqueue_kernel_blocks_non_local_void_args : Error<
++   "blocks used in enqueue_kernel call are expected to have parameters of type 'local void*'">;
++ def err_opencl_enqueue_kernel_blocks_no_args : Error<
++   "blocks with parameters are not accepted in this prototype of enqueue_kernel call">;
++ 
++ def err_opencl_builtin_expected_type : Error<
++   "illegal call to %0, expected %1 argument type">;
++ 
++ // OpenCL v3.0 s6.3.7 - Vector Components
++ def ext_opencl_ext_vector_type_rgba_selector: ExtWarn<
++   "vector component name '%0' is a feature from OpenCL version 3.0 onwards">,
++   InGroup<OpenCLUnsupportedRGBA>;
++ 
++ def err_openclcxx_placement_new : Error<
++   "use of placement new requires explicit declaration">;
++ 
++ // MIG routine annotations.
++ def warn_mig_server_routine_does_not_return_kern_return_t : Warning<
++   "'mig_server_routine' attribute only applies to routines that return a kern_return_t">,
++   InGroup<IgnoredAttributes>;
++ } // end of sema category
++ 
++ let CategoryName = "OpenMP Issue" in {
++ // OpenMP support.
++ def err_omp_expected_var_arg : Error<
++   "%0 is not a global variable, static local variable or static data member">;
++ def err_omp_expected_var_arg_suggest : Error<
++   "%0 is not a global variable, static local variable or static data member; "
++   "did you mean %1">;
++ def err_omp_global_var_arg : Error<
++   "arguments of '#pragma omp %0' must have %select{global storage|static storage duration}1">;
++ def err_omp_ref_type_arg : Error<
++   "arguments of '#pragma omp %0' cannot be of reference type %1">;
++ def err_omp_region_not_file_context : Error<
++   "directive must be at file or namespace scope">;
++ def err_omp_var_scope : Error<
++   "'#pragma omp %0' must appear in the scope of the %q1 variable declaration">;
++ def err_omp_var_used : Error<
++   "'#pragma omp %0' must precede all references to variable %q1">;
++ def err_omp_var_thread_local : Error<
++   "variable %0 cannot be threadprivate because it is %select{thread-local|a global named register variable}1">;
++ def err_omp_private_incomplete_type : Error<
++   "a private variable with incomplete type %0">;
++ def err_omp_firstprivate_incomplete_type : Error<
++   "a firstprivate variable with incomplete type %0">;
++ def err_omp_lastprivate_incomplete_type : Error<
++   "a lastprivate variable with incomplete type %0">;
++ def err_omp_reduction_incomplete_type : Error<
++   "a reduction list item with incomplete type %0">;
++ def err_omp_unexpected_clause_value : Error<
++   "expected %0 in OpenMP clause '%1'">;
++ def err_omp_expected_var_name_member_expr : Error<
++   "expected variable name%select{| or data member of current class}0">;
++ def err_omp_expected_var_name_member_expr_or_array_item : Error<
++   "expected variable name%select{|, data member of current class}0, array element or array section">;
++ def err_omp_expected_addressable_lvalue_or_array_item : Error<
++   "expected addressable lvalue expression, array element%select{ or array section|, array section or array shaping expression}0%select{| of non 'omp_depend_t' type}1">;
++ def err_omp_expected_named_var_member_or_array_expression: Error<
++   "expected expression containing only member accesses and/or array sections based on named variables">;
++ def err_omp_bit_fields_forbidden_in_clause : Error<
++   "bit fields cannot be used to specify storage in a '%0' clause">;
++ def err_array_section_does_not_specify_contiguous_storage : Error<
++   "array section does not specify contiguous storage">;
++ def err_array_section_does_not_specify_length : Error<
++   "array section does not specify length for outermost dimension">;
++ def err_omp_union_type_not_allowed : Error<
++   "mapping of union members is not allowed">;
++ def err_omp_expected_access_to_data_field : Error<
++   "expected access to data field">;
++ def err_omp_multiple_array_items_in_map_clause : Error<
++   "multiple array elements associated with the same variable are not allowed in map clauses of the same construct">;
++ def err_omp_duplicate_map_type_modifier : Error<
++   "same map type modifier has been specified more than once">;
++ def err_omp_duplicate_motion_modifier : Error<
++   "same motion modifier has been specified more than once">;
++ def err_omp_pointer_mapped_along_with_derived_section : Error<
++   "pointer cannot be mapped along with a section derived from itself">;
++ def err_omp_original_storage_is_shared_and_does_not_contain : Error<
++   "original storage of expression in data environment is shared but data environment do not fully contain mapped expression storage">;
++ def err_omp_same_pointer_dereferenced : Error<
++   "same pointer dereferenced in multiple different ways in map clause expressions">;
++ def note_omp_task_predetermined_firstprivate_here : Note<
++   "predetermined as a firstprivate in a task construct here">;
++ def err_omp_threadprivate_incomplete_type : Error<
++   "threadprivate variable with incomplete type %0">;
++ def err_omp_no_dsa_for_variable : Error<
++   "variable %0 must have explicitly specified data sharing attributes">;
++ def err_omp_defaultmap_no_attr_for_variable : Error<
++   "variable %0 must have explicitly specified data sharing attributes, data mapping attributes, or in an is_device_ptr clause">;
++ def note_omp_default_dsa_none : Note<
++   "explicit data sharing attribute requested here">;
++ def note_omp_defaultmap_attr_none : Note<
++   "explicit data sharing attribute, data mapping attribute, or is_device_ptr clause requested here">;
++ def err_omp_wrong_dsa : Error<
++   "%0 variable cannot be %1">;
++ def err_omp_variably_modified_type_not_supported : Error<
++   "arguments of OpenMP clause '%0' in '#pragma omp %2' directive cannot be of variably-modified type %1">;
++ def note_omp_explicit_dsa : Note<
++   "defined as %0">;
++ def note_omp_predetermined_dsa : Note<
++   "%select{static data member is predetermined as shared|"
++   "variable with static storage duration is predetermined as shared|"
++   "loop iteration variable is predetermined as private|"
++   "loop iteration variable is predetermined as linear|"
++   "loop iteration variable is predetermined as lastprivate|"
++   "constant variable is predetermined as shared|"
++   "global variable is predetermined as shared|"
++   "non-shared variable in a task construct is predetermined as firstprivate|"
++   "variable with automatic storage duration is predetermined as private}0"
++   "%select{|; perhaps you forget to enclose 'omp %2' directive into a parallel or another task region?}1">;
++ def note_omp_implicit_dsa : Note<
++   "implicitly determined as %0">;
++ def err_omp_loop_var_dsa : Error<
++   "loop iteration variable in the associated loop of 'omp %1' directive may not be %0, predetermined as %2">;
++ def err_omp_not_for : Error<
++   "%select{statement after '#pragma omp %1' must be a for loop|"
++   "expected %2 for loops after '#pragma omp %1'%select{|, but found only %4}3}0">;
++ def note_omp_collapse_ordered_expr : Note<
++   "as specified in %select{'collapse'|'ordered'|'collapse' and 'ordered'}0 clause%select{||s}0">;
++ def err_omp_negative_expression_in_clause : Error<
++   "argument to '%0' clause must be a %select{non-negative|strictly positive}1 integer value">;
++ def err_omp_not_integral : Error<
++   "expression must have integral or unscoped enumeration "
++   "type, not %0">;
++ def err_omp_threadprivate_in_target : Error<
++   "threadprivate variables cannot be used in target constructs">;
++ def err_omp_incomplete_type : Error<
++   "expression has incomplete class type %0">;
++ def err_omp_explicit_conversion : Error<
++   "expression requires explicit conversion from %0 to %1">;
++ def note_omp_conversion_here : Note<
++   "conversion to %select{integral|enumeration}0 type %1 declared here">;
++ def err_omp_ambiguous_conversion : Error<
++   "ambiguous conversion from type %0 to an integral or unscoped "
++   "enumeration type">;
++ def err_omp_iterator_not_integral_or_pointer : Error<
++   "expected integral or pointer type as the iterator-type, not %0">;
++ def err_omp_iterator_step_not_integral : Error<
++   "iterator step expression %0 is not the integral expression">;
++ def err_omp_iterator_step_constant_zero : Error<
++   "iterator step expression %0 evaluates to 0">;
++ def err_omp_required_access : Error<
++   "%0 variable must be %1">;
++ def err_omp_const_variable : Error<
++   "const-qualified variable cannot be %0">;
++ def err_omp_const_not_mutable_variable : Error<
++   "const-qualified variable without mutable fields cannot be %0">;
++ def err_omp_const_list_item : Error<
++   "const-qualified list item cannot be %0">;
++ def err_omp_linear_incomplete_type : Error<
++   "a linear variable with incomplete type %0">;
++ def err_omp_linear_expected_int_or_ptr : Error<
++   "argument of a linear clause should be of integral or pointer "
++   "type, not %0">;
++ def warn_omp_linear_step_zero : Warning<
++   "zero linear step (%0 %select{|and other variables in clause }1should probably be const)">,
++   InGroup<OpenMPClauses>;
++ def warn_omp_alignment_not_power_of_two : Warning<
++   "aligned clause will be ignored because the requested alignment is not a power of 2">,
++   InGroup<OpenMPClauses>;
++ def err_omp_invalid_target_decl : Error<
++   "%0 used in declare target directive is not a variable or a function name">;
++ def err_omp_declare_target_to_and_link : Error<
++   "%0 must not appear in both clauses 'to' and 'link'">;
++ def warn_omp_not_in_target_context : Warning<
++   "declaration is not declared in any declare target region">,
++   InGroup<OpenMPTarget>;
++ def err_omp_function_in_link_clause : Error<
++   "function name is not allowed in 'link' clause">;
++ def err_omp_aligned_expected_array_or_ptr : Error<
++   "argument of aligned clause should be array"
++   "%select{ or pointer|, pointer, reference to array or reference to pointer}1"
++   ", not %0">;
++ def err_omp_used_in_clause_twice : Error<
++   "%select{a variable|a parameter|'this'}0 cannot appear in more than one %1 clause">;
++ def err_omp_local_var_in_threadprivate_init : Error<
++   "variable with local storage in initial value of threadprivate variable">;
++ def err_omp_loop_not_canonical_init : Error<
++   "initialization clause of OpenMP for loop is not in canonical form "
++   "('var = init' or 'T var = init')">;
++ def ext_omp_loop_not_canonical_init : ExtWarn<
++   "initialization clause of OpenMP for loop is not in canonical form "
++   "('var = init' or 'T var = init')">, InGroup<OpenMPLoopForm>;
++ def err_omp_loop_not_canonical_cond : Error<
++   "condition of OpenMP for loop must be a relational comparison "
++   "('<', '<=', '>', %select{or '>='|'>=', or '!='}0) of loop variable %1">;
++ def err_omp_loop_not_canonical_incr : Error<
++   "increment clause of OpenMP for loop must perform simple addition "
++   "or subtraction on loop variable %0">;
++ def err_omp_loop_variable_type : Error<
++   "variable must be of integer or %select{pointer|random access iterator}0 type">;
++ def err_omp_loop_incr_not_compatible : Error<
++   "increment expression must cause %0 to %select{decrease|increase}1 "
++   "on each iteration of OpenMP for loop">;
++ def note_omp_loop_cond_requres_compatible_incr : Note<
++   "loop step is expected to be %select{negative|positive}0 due to this condition">;
++ def err_omp_loop_diff_cxx : Error<
++   "could not calculate number of iterations calling 'operator-' with "
++   "upper and lower loop bounds">;
++ def err_omp_loop_cannot_use_stmt : Error<
++   "'%0' statement cannot be used in OpenMP for loop">;
++ def err_omp_simd_region_cannot_use_stmt : Error<
++   "'%0' statement cannot be used in OpenMP simd region">;
++ def warn_omp_loop_64_bit_var : Warning<
++   "OpenMP loop iteration variable cannot have more than 64 bits size and will be narrowed">,
++   InGroup<OpenMPLoopForm>;
++ def err_omp_unknown_reduction_identifier : Error<
++   "incorrect reduction identifier, expected one of '+', '-', '*', '&', '|', '^', "
++   "'&&', '||', 'min' or 'max' or declare reduction for type %0">;
++ def err_omp_not_resolved_reduction_identifier : Error<
++   "unable to resolve declare reduction construct for type %0">;
++ def err_omp_reduction_ref_type_arg : Error<
++   "argument of OpenMP clause '%0' must reference the same object in all threads">;
++ def err_omp_clause_not_arithmetic_type_arg : Error<
++   "arguments of OpenMP clause '%0' for 'min' or 'max' must be of %select{scalar|arithmetic}1 type">;
++ def err_omp_clause_floating_type_arg : Error<
++   "arguments of OpenMP clause '%0' with bitwise operators cannot be of floating type">;
++ def err_omp_once_referenced : Error<
++   "variable can appear only once in OpenMP '%0' clause">;
++ def err_omp_once_referenced_in_target_update : Error<
++   "variable can appear only once in OpenMP 'target update' construct">;
++ def note_omp_referenced : Note<
++   "previously referenced here">;
++ def err_omp_reduction_in_task : Error<
++   "reduction variables may not be accessed in an explicit task">;
++ def err_omp_reduction_id_not_compatible : Error<
++   "list item of type %0 is not valid for specified reduction operation: unable to provide default initialization value">;
++ def err_omp_reduction_identifier_mismatch : Error<
++   "in_reduction variable must have the same reduction operation as in a task_reduction clause">;
++ def note_omp_previous_reduction_identifier : Note<
++   "previously marked as task_reduction with different reduction operation">;
++ def err_omp_prohibited_region : Error<
++   "region cannot be%select{| closely}0 nested inside '%1' region"
++   "%select{|; perhaps you forget to enclose 'omp %3' directive into a parallel region?|"
++   "; perhaps you forget to enclose 'omp %3' directive into a for or a parallel for region with 'ordered' clause?|"
++   "; perhaps you forget to enclose 'omp %3' directive into a target region?|"
++   "; perhaps you forget to enclose 'omp %3' directive into a teams region?|"
++   "; perhaps you forget to enclose 'omp %3' directive into a for, simd, for simd, parallel for, or parallel for simd region?}2">;
++ def err_omp_prohibited_region_simd : Error<
++   "OpenMP constructs may not be nested inside a simd region%select{| except for ordered simd, simd, scan, or atomic directive}0">;
++ def err_omp_prohibited_region_atomic : Error<
++   "OpenMP constructs may not be nested inside an atomic region">;
++ def err_omp_prohibited_region_critical_same_name : Error<
++   "cannot nest 'critical' regions having the same name %0">;
++ def note_omp_previous_critical_region : Note<
++   "previous 'critical' region starts here">;
++ def err_omp_several_directives_in_region : Error<
++   "exactly one '%0' directive must appear in the loop body of an enclosing directive">;
++ def note_omp_previous_directive : Note<
++   "previous '%0' directive used here">;
++ def err_omp_sections_not_compound_stmt : Error<
++   "the statement for '#pragma omp sections' must be a compound statement">;
++ def err_omp_parallel_sections_not_compound_stmt : Error<
++   "the statement for '#pragma omp parallel sections' must be a compound statement">;
++ def err_omp_orphaned_section_directive : Error<
++   "%select{orphaned 'omp section' directives are prohibited, it|'omp section' directive}0"
++   " must be closely nested to a sections region%select{|, not a %1 region}0">;
++ def err_omp_sections_substmt_not_section : Error<
++   "statement in 'omp sections' directive must be enclosed into a section region">;
++ def err_omp_parallel_sections_substmt_not_section : Error<
++   "statement in 'omp parallel sections' directive must be enclosed into a section region">;
++ def err_omp_parallel_reduction_in_task_firstprivate : Error<
++   "argument of a reduction clause of a %0 construct must not appear in a firstprivate clause on a task construct">;
++ def err_omp_atomic_read_not_expression_statement : Error<
++   "the statement for 'atomic read' must be an expression statement of form 'v = x;',"
++   " where v and x are both lvalue expressions with scalar type">;
++ def note_omp_atomic_read_write: Note<
++   "%select{expected an expression statement|expected built-in assignment operator|expected expression of scalar type|expected lvalue expression}0">;
++ def err_omp_atomic_write_not_expression_statement : Error<
++   "the statement for 'atomic write' must be an expression statement of form 'x = expr;',"
++   " where x is a lvalue expression with scalar type">;
++ def err_omp_atomic_update_not_expression_statement : Error<
++   "the statement for 'atomic update' must be an expression statement of form '++x;', '--x;', 'x++;', 'x--;', 'x binop= expr;', 'x = x binop expr' or 'x = expr binop x',"
++   " where x is an lvalue expression with scalar type">;
++ def err_omp_atomic_not_expression_statement : Error<
++   "the statement for 'atomic' must be an expression statement of form '++x;', '--x;', 'x++;', 'x--;', 'x binop= expr;', 'x = x binop expr' or 'x = expr binop x',"
++   " where x is an lvalue expression with scalar type">;
++ def note_omp_atomic_update: Note<
++   "%select{expected an expression statement|expected built-in binary or unary operator|expected unary decrement/increment operation|"
++   "expected expression of scalar type|expected assignment expression|expected built-in binary operator|"
++   "expected one of '+', '*', '-', '/', '&', '^', '%|', '<<', or '>>' built-in operations|expected in right hand side of expression}0">;
++ def err_omp_atomic_capture_not_expression_statement : Error<
++   "the statement for 'atomic capture' must be an expression statement of form 'v = ++x;', 'v = --x;', 'v = x++;', 'v = x--;', 'v = x binop= expr;', 'v = x = x binop expr' or 'v = x = expr binop x',"
++   " where x and v are both lvalue expressions with scalar type">;
++ def err_omp_atomic_capture_not_compound_statement : Error<
++   "the statement for 'atomic capture' must be a compound statement of form '{v = x; x binop= expr;}', '{x binop= expr; v = x;}',"
++   " '{v = x; x = x binop expr;}', '{v = x; x = expr binop x;}', '{x = x binop expr; v = x;}', '{x = expr binop x; v = x;}' or '{v = x; x = expr;}',"
++   " '{v = x; x++;}', '{v = x; ++x;}', '{++x; v = x;}', '{x++; v = x;}', '{v = x; x--;}', '{v = x; --x;}', '{--x; v = x;}', '{x--; v = x;}'"
++   " where x is an lvalue expression with scalar type">;
++ def note_omp_atomic_capture: Note<
++   "%select{expected assignment expression|expected compound statement|expected exactly two expression statements|expected in right hand side of the first expression}0">;
++ def err_omp_atomic_several_clauses : Error<
++   "directive '#pragma omp atomic' cannot contain more than one 'read', 'write', 'update' or 'capture' clause">;
++ def err_omp_several_mem_order_clauses : Error<
++   "directive '#pragma omp %0' cannot contain more than one %select{'seq_cst', 'relaxed', |}1'acq_rel', 'acquire' or 'release' clause">;
++ def err_omp_atomic_incompatible_mem_order_clause : Error<
++   "directive '#pragma omp atomic%select{ %0|}1' cannot be used with '%2' clause">;
++ def note_omp_previous_mem_order_clause : Note<
++   "'%0' clause used here">;
++ def err_omp_target_contains_not_only_teams : Error<
++   "target construct with nested teams region contains statements outside of the teams construct">;
++ def note_omp_nested_teams_construct_here : Note<
++   "nested teams construct here">;
++ def note_omp_nested_statement_here : Note<
++   "%select{statement|directive}0 outside teams construct here">;
++ def err_omp_single_copyprivate_with_nowait : Error<
++   "the 'copyprivate' clause must not be used with the 'nowait' clause">;
++ def note_omp_nowait_clause_here : Note<
++   "'nowait' clause is here">;
++ def err_omp_single_decl_in_declare_simd_variant : Error<
++   "single declaration is expected after 'declare %select{simd|variant}0' directive">;
++ def err_omp_function_expected : Error<
++   "'#pragma omp declare %select{simd|variant}0' can only be applied to functions">;
++ def err_omp_wrong_cancel_region : Error<
++   "one of 'for', 'parallel', 'sections' or 'taskgroup' is expected">;
++ def err_omp_parent_cancel_region_nowait : Error<
++   "parent region for 'omp %select{cancellation point|cancel}0' construct cannot be nowait">;
++ def err_omp_parent_cancel_region_ordered : Error<
++   "parent region for 'omp %select{cancellation point|cancel}0' construct cannot be ordered">;
++ def err_omp_reduction_wrong_type : Error<"reduction type cannot be %select{qualified with 'const', 'volatile' or 'restrict'|a function|a reference|an array}0 type">;
++ def err_omp_wrong_var_in_declare_reduction : Error<"only %select{'omp_priv' or 'omp_orig'|'omp_in' or 'omp_out'}0 variables are allowed in %select{initializer|combiner}0 expression">;
++ def err_omp_declare_reduction_redefinition : Error<"redefinition of user-defined reduction for type %0">;
++ def err_omp_mapper_wrong_type : Error<
++   "mapper type must be of struct, union or class type">;
++ def err_omp_declare_mapper_wrong_var : Error<
++   "only variable %0 is allowed in map clauses of this 'omp declare mapper' directive">;
++ def err_omp_declare_mapper_redefinition : Error<
++   "redefinition of user-defined mapper for type %0 with name %1">;
++ def err_omp_invalid_mapper: Error<
++   "cannot find a valid user-defined mapper for type %0 with name %1">;
++ def err_omp_array_section_use : Error<"OpenMP array section is not allowed here">;
++ def err_omp_array_shaping_use : Error<"OpenMP array shaping operation is not allowed here">;
++ def err_omp_iterator_use : Error<"OpenMP iterator is not allowed here">;
++ def err_omp_typecheck_section_value : Error<
++   "subscripted value is not an array or pointer">;
++ def err_omp_typecheck_section_not_integer : Error<
++   "array section %select{lower bound|length}0 is not an integer">;
++ def err_omp_typecheck_shaping_not_integer : Error<
++   "array shaping operation dimension is not an integer">;
++ def err_omp_shaping_dimension_not_positive : Error<
++   "array shaping dimension is evaluated to a non-positive value %0">;
++ def err_omp_section_function_type : Error<
++   "section of pointer to function type %0">;
++ def warn_omp_section_is_char : Warning<"array section %select{lower bound|length}0 is of type 'char'">,
++   InGroup<CharSubscript>, DefaultIgnore;
++ def err_omp_section_incomplete_type : Error<
++   "section of pointer to incomplete type %0">;
++ def err_omp_section_not_subset_of_array : Error<
++   "array section must be a subset of the original array">;
++ def err_omp_section_length_negative : Error<
++   "section length is evaluated to a negative value %0">;
++ def err_omp_section_stride_non_positive : Error<
++   "section stride is evaluated to a non-positive value %0">;
++ def err_omp_section_length_undefined : Error<
++   "section length is unspecified and cannot be inferred because subscripted value is %select{not an array|an array of unknown bound}0">;
++ def err_omp_wrong_linear_modifier : Error<
++   "expected %select{'val' modifier|one of 'ref', val' or 'uval' modifiers}0">;
++ def err_omp_wrong_linear_modifier_non_reference : Error<
++   "variable of non-reference type %0 can be used only with 'val' modifier, but used with '%1'">;
++ def err_omp_wrong_simdlen_safelen_values : Error<
++   "the value of 'simdlen' parameter must be less than or equal to the value of the 'safelen' parameter">;
++ def err_omp_wrong_if_directive_name_modifier : Error<
++   "directive name modifier '%0' is not allowed for '#pragma omp %1'">;
++ def err_omp_no_more_if_clause : Error<
++   "no more 'if' clause is allowed">;
++ def err_omp_unnamed_if_clause : Error<
++   "expected%select{| one of}0 %1 directive name modifier%select{|s}0">;
++ def note_omp_previous_named_if_clause : Note<
++   "previous clause with directive name modifier specified here">;
++ def err_omp_ordered_directive_with_param : Error<
++   "'ordered' directive %select{without any clauses|with 'threads' clause}0 cannot be closely nested inside ordered region with specified parameter">;
++ def err_omp_ordered_directive_without_param : Error<
++   "'ordered' directive with 'depend' clause cannot be closely nested inside ordered region without specified parameter">;
++ def note_omp_ordered_param : Note<
++   "'ordered' clause%select{| with specified parameter}0">;
++ def err_omp_expected_base_var_name : Error<
++   "expected variable name as a base of the array %select{subscript|section}0">;
++ def err_omp_map_shared_storage : Error<
++   "variable already marked as mapped in current construct">;
++ def err_omp_invalid_map_type_for_directive : Error<
++   "%select{map type '%1' is not allowed|map type must be specified}0 for '#pragma omp %2'">;
++ def err_omp_invalid_map_type_modifier_for_directive : Error<
++   "map type modifier '%0' is not allowed for '#pragma omp %1'">;
++ def err_omp_no_clause_for_directive : Error<
++   "expected at least one %0 clause for '#pragma omp %1'">;
++ def err_omp_threadprivate_in_clause : Error<
++   "threadprivate variables are not allowed in '%0' clause">;
++ def err_omp_wrong_ordered_loop_count : Error<
++   "the parameter of the 'ordered' clause must be greater than or equal to the parameter of the 'collapse' clause">;
++ def note_collapse_loop_count : Note<
++   "parameter of the 'collapse' clause">;
++ def err_omp_clauses_mutually_exclusive : Error<
++   "'%0' and '%1' clause are mutually exclusive and may not appear on the same directive">;
++ def note_omp_previous_clause : Note<
++   "'%0' clause is specified here">;
++ def err_omp_hint_clause_no_name : Error<
++   "the name of the construct must be specified in presence of 'hint' clause">;
++ def err_omp_critical_with_hint : Error<
++   "constructs with the same name must have a 'hint' clause with the same value">;
++ def note_omp_critical_hint_here : Note<
++   "%select{|previous }0'hint' clause with value '%1'">;
++ def note_omp_critical_no_hint : Note<
++   "%select{|previous }0directive with no 'hint' clause specified">;
++ def err_omp_depend_clause_thread_simd : Error<
++   "'depend' clauses cannot be mixed with '%0' clause">;
++ def err_omp_depend_sink_expected_loop_iteration : Error<
++   "expected%select{| %1}0 loop iteration variable">;
++ def err_omp_depend_sink_unexpected_expr : Error<
++   "unexpected expression: number of expressions is larger than the number of associated loops">;
++ def err_omp_depend_sink_expected_plus_minus : Error<
++   "expected '+' or '-' operation">;
++ def err_omp_depend_sink_source_not_allowed : Error<
++   "'depend(%select{source|sink:vec}0)' clause%select{|s}0 cannot be mixed with 'depend(%select{sink:vec|source}0)' clause%select{s|}0">;
++ def err_omp_depend_zero_length_array_section_not_allowed : Error<
++   "zero-length array section is not allowed in 'depend' clause">;
++ def err_omp_depend_sink_source_with_modifier : Error<
++   "depend modifier cannot be used with 'sink' or 'source' depend type">;
++ def err_omp_depend_modifier_not_iterator : Error<
++   "expected iterator specification as depend modifier">;
++ def err_omp_linear_ordered : Error<
++   "'linear' clause cannot be specified along with 'ordered' clause with a parameter">;
++ def err_omp_unexpected_schedule_modifier : Error<
++   "modifier '%0' cannot be used along with modifier '%1'">;
++ def err_omp_schedule_nonmonotonic_static : Error<
++   "'nonmonotonic' modifier can only be specified with 'dynamic' or 'guided' schedule kind">;
++ def err_omp_simple_clause_incompatible_with_ordered : Error<
++   "'%0' clause with '%1' modifier cannot be specified if an 'ordered' clause is specified">;
++ def err_omp_ordered_simd : Error<
++   "'ordered' clause with a parameter can not be specified in '#pragma omp %0' directive">;
++ def err_omp_variable_in_given_clause_and_dsa : Error<
++   "%0 variable cannot be in a %1 clause in '#pragma omp %2' directive">;
++ def err_omp_param_or_this_in_clause : Error<
++   "expected reference to one of the parameters of function %0%select{| or 'this'}1">;
++ def err_omp_expected_uniform_param : Error<
++   "expected a reference to a parameter specified in a 'uniform' clause">;
++ def err_omp_expected_int_param : Error<
++   "expected a reference to an integer-typed parameter">;
++ def err_omp_at_least_one_motion_clause_required : Error<
++   "expected at least one 'to' clause or 'from' clause specified to '#pragma omp target update'">;
++ def err_omp_usedeviceptr_not_a_pointer : Error<
++   "expected pointer or reference to pointer in 'use_device_ptr' clause">;
++ def err_omp_argument_type_isdeviceptr : Error <
++   "expected pointer, array, reference to pointer, or reference to array in 'is_device_ptr clause'">;
++ def warn_omp_nesting_simd : Warning<
++   "OpenMP only allows an ordered construct with the simd clause nested in a simd construct">,
++   InGroup<SourceUsesOpenMP>;
++ def err_omp_orphaned_device_directive : Error<
++   "orphaned 'omp %0' directives are prohibited"
++   "; perhaps you forget to enclose the directive into a "
++   "%select{|||target |teams|for, simd, for simd, parallel for, or parallel for simd }1region?">;
++ def err_omp_reduction_non_addressable_expression : Error<
++   "expected addressable reduction item for the task-based directives">;
++ def err_omp_reduction_with_nogroup : Error<
++   "'reduction' clause cannot be used with 'nogroup' clause">;
++ def err_omp_reduction_vla_unsupported : Error<
++   "cannot generate code for reduction on %select{|array section, which requires a }0variable length array">;
++ def err_omp_linear_distribute_var_non_loop_iteration : Error<
++   "only loop iteration variables are allowed in 'linear' clause in distribute directives">;
++ def warn_omp_non_trivial_type_mapped : Warning<
++   "Type %0 is not trivially copyable and not guaranteed to be mapped correctly">,
++   InGroup<OpenMPMapping>;
++ def err_omp_requires_clause_redeclaration : Error <
++   "Only one %0 clause can appear on a requires directive in a single translation unit">;
++ def note_omp_requires_previous_clause : Note <
++   "%0 clause previously used here">;
++ def err_omp_directive_before_requires : Error <
++   "'%0' region encountered before requires directive with '%1' clause">;
++ def note_omp_requires_encountered_directive : Note <
++   "'%0' previously encountered here">;
++ def err_omp_invalid_scope : Error <
++   "'#pragma omp %0' directive must appear only in file scope">;
++ def note_omp_invalid_length_on_this_ptr_mapping : Note <
++   "expected length on mapping of 'this' array section expression to be '1'">;
++ def note_omp_invalid_lower_bound_on_this_ptr_mapping : Note <
++   "expected lower bound on mapping of 'this' array section expression to be '0' or not specified">;
++ def note_omp_invalid_subscript_on_this_ptr_map : Note <
++   "expected 'this' subscript expression on map clause to be 'this[0]'">;
++ def err_omp_invalid_map_this_expr : Error <
++   "invalid 'this' expression on 'map' clause">;
++ def err_omp_implied_type_not_found : Error<
++   "'%0' type not found; include <omp.h>">;
++ def err_omp_expected_omp_depend_t_lvalue : Error<
++   "expected lvalue expression%select{ of 'omp_depend_t' type, not %1|}0">;
++ def err_omp_depobj_expected : Error<
++   "expected depobj expression">;
++ def err_omp_depobj_single_clause_expected : Error<
++   "exactly one of 'depend', 'destroy', or 'update' clauses is expected">;
++ def err_omp_scan_single_clause_expected : Error<
++   "exactly one of 'inclusive' or 'exclusive' clauses is expected">;
++ def err_omp_inclusive_exclusive_not_reduction : Error<
++   "the list item must appear in 'reduction' clause with the 'inscan' modifier "
++   "of the parent directive">;
++ def err_omp_reduction_not_inclusive_exclusive : Error<
++   "the inscan reduction list item must appear as a list item in an 'inclusive' or"
++   " 'exclusive' clause on an inner 'omp scan' directive">;
++ def err_omp_wrong_inscan_reduction : Error<
++   "'inscan' modifier can be used only in 'omp for', 'omp simd', 'omp for simd',"
++   " 'omp parallel for', or 'omp parallel for simd' directive">;
++ def err_omp_inscan_reduction_expected : Error<
++   "expected 'reduction' clause with the 'inscan' modifier">;
++ def note_omp_previous_inscan_reduction : Note<
++   "'reduction' clause with 'inscan' modifier is used here">;
++ def err_omp_expected_predefined_allocator : Error<
++   "expected one of the predefined allocators for the variables with the static "
++   "storage: 'omp_default_mem_alloc', 'omp_large_cap_mem_alloc', "
++   "'omp_const_mem_alloc', 'omp_high_bw_mem_alloc', 'omp_low_lat_mem_alloc', "
++   "'omp_cgroup_mem_alloc', 'omp_pteam_mem_alloc' or 'omp_thread_mem_alloc'">;
++ def warn_omp_used_different_allocator : Warning<
++   "allocate directive specifies %select{default|'%1'}0 allocator while "
++   "previously used %select{default|'%3'}2">,
++   InGroup<OpenMPClauses>;
++ def note_omp_previous_allocator : Note<
++   "previous allocator is specified here">;
++ def err_expected_allocator_clause : Error<"expected an 'allocator' clause "
++   "inside of the target region; provide an 'allocator' clause or use 'requires'"
++   " directive with the 'dynamic_allocators' clause">;
++ def err_expected_allocator_expression : Error<"expected an allocator expression "
++   "inside of the target region; provide an allocator expression or use 'requires'"
++   " directive with the 'dynamic_allocators' clause">;
++ def warn_omp_allocate_thread_on_task_target_directive : Warning<
++   "allocator with the 'thread' trait access has unspecified behavior on '%0' directive">,
++   InGroup<OpenMPClauses>;
++ def err_omp_expected_private_copy_for_allocate : Error<
++   "the referenced item is not found in any private clause on the same directive">;
++ def err_omp_stmt_depends_on_loop_counter : Error<
++   "the loop %select{initializer|condition}0 expression depends on the current loop control variable">;
++ def err_omp_invariant_dependency : Error<
++   "expected loop invariant expression">;
++ def err_omp_invariant_or_linear_dependency : Error<
++   "expected loop invariant expression or '<invariant1> * %0 + <invariant2>' kind of expression">;
++ def err_omp_wrong_dependency_iterator_type : Error<
++   "expected an integer or a pointer type of the outer loop counter '%0' for non-rectangular nests">;
++ def err_device_unsupported_type
++     : Error<"%0 requires %select{|%2 bit size}1 %3 type support, but device "
++             "'%4' does not support it">;
++ def err_omp_lambda_capture_in_declare_target_not_to : Error<
++   "variable captured in declare target region must appear in a to clause">;
++ def err_omp_device_type_mismatch : Error<
++   "'device_type(%0)' does not match previously specified 'device_type(%1)' for the same declaration">;
++ def err_omp_wrong_device_function_call : Error<
++   "function with 'device_type(%0)' is not available on %select{device|host}1">;
++ def note_omp_marked_device_type_here : Note<"marked as 'device_type(%0)' here">;
++ def warn_omp_declare_target_after_first_use : Warning<
++   "declaration marked as declare target after first use, it may lead to incorrect results">,
++   InGroup<OpenMPTarget>;
++ def err_omp_declare_variant_incompat_attributes : Error<
++   "'#pragma omp declare variant' is not compatible with any target-specific attributes">;
++ def warn_omp_declare_variant_score_not_constant
++     : Warning<"score expressions in the OpenMP context selector need to be "
++               "constant; %0 is not and will be ignored">,
++       InGroup<SourceUsesOpenMP>;
++ def err_omp_declare_variant_user_condition_not_constant
++     : Error<"the user condition in the OpenMP context selector needs to be "
++             "constant; %0 is not">;
++ def warn_omp_declare_variant_after_used : Warning<
++   "'#pragma omp declare variant' cannot be applied for function after first "
++   "usage; the original function might be used">, InGroup<SourceUsesOpenMP>;
++ def warn_omp_declare_variant_after_emitted : Warning<
++   "'#pragma omp declare variant' cannot be applied to the function that was defined already;"
++   " the original function might be used">, InGroup<SourceUsesOpenMP>;
++ def err_omp_declare_variant_doesnt_support : Error<
++   "'#pragma omp declare variant' does not "
++   "support %select{function templates|virtual functions|"
++   "deduced return types|constructors|destructors|deleted functions|"
++   "defaulted functions|constexpr functions|consteval function}0">;
++ def err_omp_declare_variant_diff : Error<
++   "function with '#pragma omp declare variant' has a different %select{calling convention"
++   "|return type|constexpr specification|inline specification|storage class|"
++   "linkage}0">;
++ def err_omp_declare_variant_incompat_types : Error<
++   "variant in '#pragma omp declare variant' with type %0 is incompatible with type %1"
++   >;
++ def warn_omp_declare_variant_marked_as_declare_variant : Warning<
++   "variant function in '#pragma omp declare variant' is itself marked as '#pragma omp declare variant'"
++   >, InGroup<SourceUsesOpenMP>;
++ def note_omp_marked_declare_variant_here : Note<"marked as 'declare variant' here">;
++ def err_omp_one_defaultmap_each_category: Error<
++   "at most one defaultmap clause for each variable-category can appear on the directive">;
++ def err_omp_lastprivate_conditional_non_scalar : Error<
++   "expected list item of scalar type in 'lastprivate' clause with 'conditional' modifier"
++   >;
++ def err_omp_flush_order_clause_and_list : Error<
++   "'flush' directive with memory order clause '%0' cannot have the list">;
++ def note_omp_flush_order_clause_here : Note<
++   "memory order clause '%0' is specified here">;
++ def err_omp_non_lvalue_in_map_or_motion_clauses: Error<
++   "expected addressable lvalue in '%0' clause">;
++ def err_omp_var_expected : Error<
++   "expected variable of the '%0' type%select{|, not %2}1">;
++ def warn_unknown_declare_variant_isa_trait
++     : Warning<"isa trait '%0' is not known to the current target; verify the "
++               "spelling or consider restricting the context selector with the "
++               "'arch' selector further">,
++       InGroup<SourceUsesOpenMP>;
++ def err_omp_non_pointer_type_array_shaping_base : Error<
++   "expected expression with a pointer to a complete type as a base of an array "
++   "shaping operation">;
++ def err_omp_reduction_task_not_parallel_or_worksharing : Error<
++   "'reduction' clause with 'task' modifier allowed only on non-simd parallel or"
++   " worksharing constructs">;
++ def err_omp_expected_array_alloctraits : Error<
++   "expected constant sized array of 'omp_alloctrait_t' elements, not %0">;
++ def err_omp_predefined_allocator_with_traits : Error<
++   "predefined allocator cannot have traits specified">;
++ def note_omp_predefined_allocator : Note<
++   "predefined trait '%0' used here">;
++ def err_omp_nonpredefined_allocator_without_traits : Error<
++   "non-predefined allocator must have traits specified">;
++ def err_omp_allocator_used_in_clauses : Error<
++   "allocators used in 'uses_allocators' clause cannot appear in other "
++   "data-sharing or data-mapping attribute clauses">;
++ def err_omp_allocator_not_in_uses_allocators : Error<
++   "allocator must be specified in the 'uses_allocators' clause">;
++ def note_omp_protected_structured_block
++     : Note<"jump bypasses OpenMP structured block">;
++ def note_omp_exits_structured_block
++     : Note<"jump exits scope of OpenMP structured block">;
++ def err_omp_interop_variable_expected : Error<
++   "expected%select{| non-const}0 variable of type 'omp_interop_t'">;
++ def err_omp_interop_variable_wrong_type : Error<
++   "interop variable must be of type 'omp_interop_t'">;
++ def err_omp_interop_prefer_type : Error<
++   "prefer_list item must be a string literal or constant integral "
++   "expression">;
++ def err_omp_interop_bad_depend_clause : Error<
++   "'depend' clause requires the 'targetsync' interop type">;
++ def err_omp_interop_var_multiple_actions : Error<
++   "interop variable %0 used in multiple action clauses">;
++ def err_omp_dispatch_statement_call
++     : Error<"statement after '#pragma omp dispatch' must be a direct call"
++             " to a target function or an assignment to one">;
++ def err_omp_unroll_full_variable_trip_count : Error<
++   "loop to be fully unrolled must have a constant trip count">;
++ def note_omp_directive_here : Note<"'%0' directive found here">;
++ def err_omp_instantiation_not_supported
++     : Error<"instantiation of '%0' not supported yet">;
++ } // end of OpenMP category
++ 
++ let CategoryName = "Related Result Type Issue" in {
++ // Objective-C related result type compatibility
++ def warn_related_result_type_compatibility_class : Warning<
++   "method is expected to return an instance of its class type "
++   "%diff{$, but is declared to return $|"
++   ", but is declared to return different type}0,1">;
++ def warn_related_result_type_compatibility_protocol : Warning<
++   "protocol method is expected to return an instance of the implementing "
++   "class, but is declared to return %0">;
++ def note_related_result_type_family : Note<
++   "%select{overridden|current}0 method is part of the '%select{|alloc|copy|init|"
++   "mutableCopy|new|autorelease|dealloc|finalize|release|retain|retainCount|"
++   "self}1' method family%select{| and is expected to return an instance of its "
++   "class type}0">;
++ def note_related_result_type_overridden : Note<
++   "overridden method returns an instance of its class type">;
++ def note_related_result_type_inferred : Note<
++   "%select{class|instance}0 method %1 is assumed to return an instance of "
++   "its receiver type (%2)">;
++ def note_related_result_type_explicit : Note<
++   "%select{overridden|current}0 method is explicitly declared 'instancetype'"
++   "%select{| and is expected to return an instance of its class type}0">;
++ def err_invalid_type_for_program_scope_var : Error<
++   "the %0 type cannot be used to declare a program scope variable">;
++ 
++ }
++ 
++ let CategoryName = "Modules Issue" in {
++ def err_module_decl_in_module_map_module : Error<
++   "'module' declaration found while building module from module map">;
++ def err_module_decl_in_header_module : Error<
++   "'module' declaration found while building header unit">;
++ def err_module_interface_implementation_mismatch : Error<
++   "missing 'export' specifier in module declaration while "
++   "building module interface">;
++ def err_current_module_name_mismatch : Error<
++   "module name '%0' specified on command line does not match name of module">;
++ def err_module_redefinition : Error<
++   "redefinition of module '%0'">;
++ def note_prev_module_definition : Note<"previously defined here">;
++ def note_prev_module_definition_from_ast_file : Note<"module loaded from '%0'">;
++ def err_module_not_defined : Error<
++   "definition of module '%0' is not available; use -fmodule-file= to specify "
++   "path to precompiled module interface">;
++ def err_module_redeclaration : Error<
++   "translation unit contains multiple module declarations">;
++ def note_prev_module_declaration : Note<"previous module declaration is here">;
++ def err_module_declaration_missing : Error<
++   "missing 'export module' declaration in module interface unit">;
++ def err_module_declaration_missing_after_global_module_introducer : Error<
++   "missing 'module' declaration at end of global module fragment "
++   "introduced here">;
++ def err_module_private_specialization : Error<
++   "%select{template|partial|member}0 specialization cannot be "
++   "declared __module_private__">;
++ def err_module_private_local : Error<
++   "%select{local variable|parameter|typedef}0 %1 cannot be declared "
++   "__module_private__">;
++ def err_module_private_local_class : Error<
++   "local %select{struct|interface|union|class|enum}0 cannot be declared "
++   "__module_private__">;
++ def err_module_unimported_use : Error<
++   "%select{declaration|definition|default argument|"
++   "explicit specialization|partial specialization}0 of %1 must be imported "
++   "from module '%2' before it is required">;
++ def err_module_unimported_use_header : Error<
++   "%select{missing '#include'|missing '#include %3'}2; "
++   "%select{||default argument of |explicit specialization of |"
++   "partial specialization of }0%1 must be "
++   "%select{declared|defined|defined|declared|declared}0 "
++   "before it is used">;
++ def err_module_unimported_use_multiple : Error<
++   "%select{declaration|definition|default argument|"
++   "explicit specialization|partial specialization}0 of %1 must be imported "
++   "from one of the following modules before it is required:%2">;
++ def note_unreachable_entity : Note<
++   "%select{declaration|definition|default argument declared|"
++   "explicit specialization declared|partial specialization declared}0 here "
++   "is not %select{visible|reachable|reachable|reachable|reachable|reachable}0">;
++ def ext_module_import_in_extern_c : ExtWarn<
++   "import of C++ module '%0' appears within extern \"C\" language linkage "
++   "specification">, DefaultError,
++   InGroup<DiagGroup<"module-import-in-extern-c">>;
++ def err_module_import_not_at_top_level_fatal : Error<
++   "import of module '%0' appears within %1">, DefaultFatal;
++ def ext_module_import_not_at_top_level_noop : ExtWarn<
++   "redundant #include of module '%0' appears within %1">, DefaultError,
++   InGroup<DiagGroup<"modules-import-nested-redundant">>;
++ def note_module_import_not_at_top_level : Note<"%0 begins here">;
++ def err_module_self_import : Error<
++   "import of module '%0' appears within same top-level module '%1'">;
++ def err_module_import_in_implementation : Error<
++   "@import of module '%0' in implementation of '%1'; use #import">;
++ 
++ // C++ Modules
++ def err_module_decl_not_at_start : Error<
++   "module declaration must occur at the start of the translation unit">;
++ def note_global_module_introducer_missing : Note<
++   "add 'module;' to the start of the file to introduce a "
++   "global module fragment">;
++ def err_export_within_anonymous_namespace : Error<
++   "export declaration appears within anonymous namespace">;
++ def note_anonymous_namespace : Note<"anonymous namespace begins here">;
++ def ext_export_no_name_block : ExtWarn<
++   "ISO C++20 does not permit %select{an empty|a static_assert}0 declaration "
++   "to appear in an export block">, InGroup<ExportUnnamed>;
++ def ext_export_no_names : ExtWarn<
++   "ISO C++20 does not permit a declaration that does not introduce any names "
++   "to be exported">, InGroup<ExportUnnamed>;
++ def note_export : Note<"export block begins here">;
++ def err_export_no_name : Error<
++   "%select{empty|static_assert|asm}0 declaration cannot be exported">;
++ def ext_export_using_directive : ExtWarn<
++   "ISO C++20 does not permit using directive to be exported">,
++   InGroup<DiagGroup<"export-using-directive">>;
++ def err_export_within_export : Error<
++   "export declaration appears within another export declaration">;
++ def err_export_internal : Error<
++   "declaration of %0 with internal linkage cannot be exported">;
++ def err_export_using_internal : Error<
++   "using declaration referring to %0 with internal linkage cannot be exported">;
++ def err_export_not_in_module_interface : Error<
++   "export declaration can only be used within a module interface unit"
++   "%select{ after the module declaration|}0">;
++ def err_export_in_private_module_fragment : Error<
++   "export declaration cannot be used in a private module fragment">;
++ def note_private_module_fragment : Note<
++   "private module fragment begins here">;
++ def err_private_module_fragment_not_module : Error<
++   "private module fragment declaration with no preceding module declaration">;
++ def err_private_module_fragment_redefined : Error<
++   "private module fragment redefined">;
++ def err_private_module_fragment_not_module_interface : Error<
++   "private module fragment in module implementation unit">;
++ def note_not_module_interface_add_export : Note<
++   "add 'export' here if this is intended to be a module interface unit">;
++ 
++ def ext_equivalent_internal_linkage_decl_in_modules : ExtWarn<
++   "ambiguous use of internal linkage declaration %0 defined in multiple modules">,
++   InGroup<DiagGroup<"modules-ambiguous-internal-linkage">>;
++ def note_equivalent_internal_linkage_decl : Note<
++   "declared here%select{ in module '%1'|}0">;
++ 
++ def note_redefinition_modules_same_file : Note<
++   "'%0' included multiple times, additional include site in header from module '%1'">;
++ def note_redefinition_include_same_file : Note<
++   "'%0' included multiple times, additional include site here">;
++ }
++ 
++ let CategoryName = "Coroutines Issue" in {
++ def err_return_in_coroutine : Error<
++   "return statement not allowed in coroutine; did you mean 'co_return'?">;
++ def note_declared_coroutine_here : Note<
++   "function is a coroutine due to use of '%0' here">;
++ def err_coroutine_objc_method : Error<
++   "Objective-C methods as coroutines are not yet supported">;
++ def err_coroutine_unevaluated_context : Error<
++   "'%0' cannot be used in an unevaluated context">;
++ def err_coroutine_within_handler : Error<
++   "'%0' cannot be used in the handler of a try block">;
++ def err_coroutine_outside_function : Error<
++   "'%0' cannot be used outside a function">;
++ def err_coroutine_invalid_func_context : Error<
++   "'%1' cannot be used in %select{a constructor|a destructor"
++   "|the 'main' function|a constexpr function"
++   "|a function with a deduced return type|a varargs function"
++   "|a consteval function}0">;
++ def err_implied_coroutine_type_not_found : Error<
++   "%0 type was not found; include <experimental/coroutine> before defining "
++   "a coroutine">;
++ def err_implicit_coroutine_std_nothrow_type_not_found : Error<
++   "std::nothrow was not found; include <new> before defining a coroutine which "
++   "uses get_return_object_on_allocation_failure()">;
++ def err_malformed_std_nothrow : Error<
++   "std::nothrow must be a valid variable declaration">;
++ def err_malformed_std_coroutine_handle : Error<
++   "std::experimental::coroutine_handle must be a class template">;
++ def err_coroutine_handle_missing_member : Error<
++   "std::experimental::coroutine_handle missing a member named '%0'">;
++ def err_malformed_std_coroutine_traits : Error<
++   "'std::experimental::coroutine_traits' must be a class template">;
++ def err_implied_std_coroutine_traits_promise_type_not_found : Error<
++   "this function cannot be a coroutine: %q0 has no member named 'promise_type'">;
++ def err_implied_std_coroutine_traits_promise_type_not_class : Error<
++   "this function cannot be a coroutine: %0 is not a class">;
++ def err_coroutine_promise_type_incomplete : Error<
++   "this function cannot be a coroutine: %0 is an incomplete type">;
++ def err_coroutine_type_missing_specialization : Error<
++   "this function cannot be a coroutine: missing definition of "
++   "specialization %0">;
++ def err_coroutine_promise_incompatible_return_functions : Error<
++   "the coroutine promise type %0 declares both 'return_value' and 'return_void'">;
++ def err_coroutine_promise_requires_return_function : Error<
++   "the coroutine promise type %0 must declare either 'return_value' or 'return_void'">;
++ def note_coroutine_promise_implicit_await_transform_required_here : Note<
++   "call to 'await_transform' implicitly required by 'co_await' here">;
++ def note_coroutine_promise_suspend_implicitly_required : Note<
++   "call to '%select{initial_suspend|final_suspend}0' implicitly "
++   "required by the %select{initial suspend point|final suspend point}0">;
++ def err_coroutine_promise_unhandled_exception_required : Error<
++   "%0 is required to declare the member 'unhandled_exception()'">;
++ def warn_coroutine_promise_unhandled_exception_required_with_exceptions : Warning<
++   "%0 is required to declare the member 'unhandled_exception()' when exceptions are enabled">,
++   InGroup<CoroutineMissingUnhandledException>;
++ def err_coroutine_promise_get_return_object_on_allocation_failure : Error<
++   "%0: 'get_return_object_on_allocation_failure()' must be a static member function">;
++ def err_seh_in_a_coroutine_with_cxx_exceptions : Error<
++   "cannot use SEH '__try' in a coroutine when C++ exceptions are enabled">;
++ def err_coroutine_promise_new_requires_nothrow : Error<
++   "%0 is required to have a non-throwing noexcept specification when the promise "
++    "type declares 'get_return_object_on_allocation_failure()'">;
++ def note_coroutine_promise_call_implicitly_required : Note<
++   "call to %0 implicitly required by coroutine function here">;
++ def err_await_suspend_invalid_return_type : Error<
++   "return type of 'await_suspend' is required to be 'void' or 'bool' (have %0)"
++ >;
++ def note_await_ready_no_bool_conversion : Note<
++   "return type of 'await_ready' is required to be contextually convertible to 'bool'"
++ >;
++ def warn_coroutine_handle_address_invalid_return_type : Warning <
++   "return type of 'coroutine_handle<>::address should be 'void*' (have %0) in order to get capability with existing async C API.">,
++   InGroup<Coroutine>;
++ def err_coroutine_promise_final_suspend_requires_nothrow : Error<
++   "the expression 'co_await __promise.final_suspend()' is required to be non-throwing"
++ >;
++ def note_coroutine_function_declare_noexcept : Note<
++   "must be declared with 'noexcept'"
++ >;
++ } // end of coroutines issue category
++ 
++ let CategoryName = "Documentation Issue" in {
++ def warn_not_a_doxygen_trailing_member_comment : Warning<
++   "not a Doxygen trailing comment">, InGroup<Documentation>, DefaultIgnore;
++ } // end of documentation issue category
++ 
++ let CategoryName = "Nullability Issue" in {
++ 
++ def warn_mismatched_nullability_attr : Warning<
++   "nullability specifier %0 conflicts with existing specifier %1">,
++   InGroup<Nullability>;
++ 
++ def warn_nullability_declspec : Warning<
++   "nullability specifier %0 cannot be applied "
++   "to non-pointer type %1; did you mean to apply the specifier to the "
++   "%select{pointer|block pointer|member pointer|function pointer|"
++   "member function pointer}2?">,
++   InGroup<NullabilityDeclSpec>,
++   DefaultError;
++ 
++ def note_nullability_here : Note<"%0 specified here">;
++ 
++ def err_nullability_nonpointer : Error<
++   "nullability specifier %0 cannot be applied to non-pointer type %1">;
++ 
++ def warn_nullability_lost : Warning<
++   "implicit conversion from nullable pointer %0 to non-nullable pointer "
++   "type %1">,
++   InGroup<NullableToNonNullConversion>, DefaultIgnore;
++ def warn_zero_as_null_pointer_constant : Warning<
++   "zero as null pointer constant">,
++   InGroup<DiagGroup<"zero-as-null-pointer-constant">>, DefaultIgnore;
++ 
++ def err_nullability_cs_multilevel : Error<
++   "nullability keyword %0 cannot be applied to multi-level pointer type %1">;
++ def note_nullability_type_specifier : Note<
++   "use nullability type specifier %0 to affect the innermost "
++   "pointer type of %1">;
++ 
++ def warn_null_resettable_setter : Warning<
++   "synthesized setter %0 for null_resettable property %1 does not handle nil">,
++   InGroup<Nullability>;
++ 
++ def warn_nullability_missing : Warning<
++   "%select{pointer|block pointer|member pointer}0 is missing a nullability "
++   "type specifier (_Nonnull, _Nullable, or _Null_unspecified)">,
++   InGroup<NullabilityCompleteness>;
++ def warn_nullability_missing_array : Warning<
++   "array parameter is missing a nullability type specifier (_Nonnull, "
++   "_Nullable, or _Null_unspecified)">,
++   InGroup<NullabilityCompletenessOnArrays>;
++ def note_nullability_fix_it : Note<
++   "insert '%select{_Nonnull|_Nullable|_Null_unspecified}0' if the "
++   "%select{pointer|block pointer|member pointer|array parameter}1 "
++   "%select{should never be null|may be null|should not declare nullability}0">;
++ 
++ def warn_nullability_inferred_on_nested_type : Warning<
++   "inferring '_Nonnull' for pointer type within %select{array|reference}0 is "
++   "deprecated">,
++   InGroup<NullabilityInferredOnNestedType>;
++ 
++ def err_objc_type_arg_explicit_nullability : Error<
++   "type argument %0 cannot explicitly specify nullability">;
++ 
++ def err_objc_type_param_bound_explicit_nullability : Error<
++   "type parameter %0 bound %1 cannot explicitly specify nullability">;
++ 
++ }
++ 
++ let CategoryName = "Generics Issue" in {
++ 
++ def err_objc_type_param_bound_nonobject : Error<
++   "type bound %0 for type parameter %1 is not an Objective-C pointer type">;
++ 
++ def err_objc_type_param_bound_missing_pointer : Error<
++   "missing '*' in type bound %0 for type parameter %1">;
++ def err_objc_type_param_bound_qualified : Error<
++   "type bound %1 for type parameter %0 cannot be qualified with '%2'">;
++ 
++ def err_objc_type_param_redecl : Error<
++   "redeclaration of type parameter %0">;
++ 
++ def err_objc_type_param_arity_mismatch : Error<
++   "%select{forward class declaration|class definition|category|extension}0 has "
++   "too %select{few|many}1 type parameters (expected %2, have %3)">;
++ 
++ def err_objc_type_param_bound_conflict : Error<
++   "type bound %0 for type parameter %1 conflicts with "
++   "%select{implicit|previous}2 bound %3%select{for type parameter %5|}4">;
++ 
++ def err_objc_type_param_variance_conflict : Error<
++   "%select{in|co|contra}0variant type parameter %1 conflicts with previous "
++   "%select{in|co|contra}2variant type parameter %3">;
++ 
++ def note_objc_type_param_here : Note<"type parameter %0 declared here">;
++ 
++ def err_objc_type_param_bound_missing : Error<
++   "missing type bound %0 for type parameter %1 in %select{@interface|@class}2">;
++ 
++ def err_objc_parameterized_category_nonclass : Error<
++   "%select{extension|category}0 of non-parameterized class %1 cannot have type "
++   "parameters">;
++ 
++ def err_objc_parameterized_forward_class : Error<
++   "forward declaration of non-parameterized class %0 cannot have type "
++   "parameters">;
++ 
++ def err_objc_parameterized_forward_class_first : Error<
++   "class %0 previously declared with type parameters">;
++ 
++ def err_objc_type_arg_missing_star : Error<
++   "type argument %0 must be a pointer (requires a '*')">;
++ def err_objc_type_arg_qualified : Error<
++   "type argument %0 cannot be qualified with '%1'">;
++ 
++ def err_objc_type_arg_missing : Error<
++   "no type or protocol named %0">;
++ 
++ def err_objc_type_args_and_protocols : Error<
++   "angle brackets contain both a %select{type|protocol}0 (%1) and a "
++   "%select{protocol|type}0 (%2)">;
++ 
++ def err_objc_type_args_non_class : Error<
++   "type arguments cannot be applied to non-class type %0">;
++ 
++ def err_objc_type_args_non_parameterized_class : Error<
++   "type arguments cannot be applied to non-parameterized class %0">;
++ 
++ def err_objc_type_args_specialized_class : Error<
++   "type arguments cannot be applied to already-specialized class type %0">;
++ 
++ def err_objc_type_args_wrong_arity : Error<
++   "too %select{many|few}0 type arguments for class %1 (have %2, expected %3)">;
++ }
++ 
++ def err_objc_type_arg_not_id_compatible : Error<
++   "type argument %0 is neither an Objective-C object nor a block type">;
++ 
++ def err_objc_type_arg_does_not_match_bound : Error<
++   "type argument %0 does not satisfy the bound (%1) of type parameter %2">;
++ 
++ def warn_objc_redundant_qualified_class_type : Warning<
++   "parameterized class %0 already conforms to the protocols listed; did you "
++   "forget a '*'?">, InGroup<ObjCProtocolQualifiers>;
++ 
++ def warn_block_literal_attributes_on_omitted_return_type : Warning<
++   "attribute %0 ignored, because it cannot be applied to omitted return type">,
++   InGroup<IgnoredAttributes>;
++ 
++ def warn_block_literal_qualifiers_on_omitted_return_type : Warning<
++   "'%0' qualifier on omitted return type %1 has no effect">,
++   InGroup<IgnoredQualifiers>;
++ 
++ def warn_shadow_field : Warning<
++   "%select{parameter|non-static data member}3 %0 %select{|of %1 }3shadows "
++   "member inherited from type %2">, InGroup<ShadowField>, DefaultIgnore;
++ def note_shadow_field : Note<"declared here">;
++ 
++ def err_multiversion_required_in_redecl : Error<
++   "function declaration is missing %select{'target'|'cpu_specific' or "
++   "'cpu_dispatch'}0 attribute in a multiversioned function">;
++ def note_multiversioning_caused_here : Note<
++   "function multiversioning caused by this declaration">;
++ def err_multiversion_after_used : Error<
++   "function declaration cannot become a multiversioned function after first "
++   "usage">;
++ def err_bad_multiversion_option : Error<
++   "function multiversioning doesn't support %select{feature|architecture}0 "
++   "'%1'">;
++ def err_multiversion_duplicate : Error<
++   "multiversioned function redeclarations require identical target attributes">;
++ def err_multiversion_noproto : Error<
++   "multiversioned function must have a prototype">;
++ def err_multiversion_disallowed_other_attr : Error<
++   "attribute '%select{target|cpu_specific|cpu_dispatch}0' multiversioning cannot be combined"
++   " with attribute %1">;
++ def err_multiversion_mismatched_attrs
++     : Error<"attributes on multiversioned functions must all match, attribute "
++             "%0 %select{is missing|has different arguments}1">;
++ def err_multiversion_diff : Error<
++   "multiversioned function declaration has a different %select{calling convention"
++   "|return type|constexpr specification|inline specification|linkage|"
++   "language linkage}0">;
++ def err_multiversion_doesnt_support : Error<
++   "attribute '%select{target|cpu_specific|cpu_dispatch}0' multiversioned functions do not "
++   "yet support %select{function templates|virtual functions|"
++   "deduced return types|constructors|destructors|deleted functions|"
++   "defaulted functions|constexpr functions|consteval function}1">;
++ def err_multiversion_not_allowed_on_main : Error<
++   "'main' cannot be a multiversioned function">;
++ def err_multiversion_not_supported : Error<
++  "function multiversioning is not supported on the current target">;
++ def err_multiversion_types_mixed : Error<
++   "multiversioning attributes cannot be combined">;
++ def err_cpu_dispatch_mismatch : Error<
++  "'cpu_dispatch' function redeclared with different CPUs">;
++ def err_cpu_specific_multiple_defs : Error<
++  "multiple 'cpu_specific' functions cannot specify the same CPU: %0">;
++ def warn_multiversion_duplicate_entries : Warning<
++  "CPU list contains duplicate entries; attribute ignored">,
++   InGroup<FunctionMultiVersioning>;
++ def warn_dispatch_body_ignored : Warning<
++   "body of cpu_dispatch function will be ignored">,
++   InGroup<FunctionMultiVersioning>;
++ 
++ // three-way comparison operator diagnostics
++ def err_implied_comparison_category_type_not_found : Error<
++   "cannot %select{use builtin operator '<=>'|default 'operator<=>'}1 "
++   "because type '%0' was not found; include <compare>">;
++ def err_spaceship_argument_narrowing : Error<
++   "argument to 'operator<=>' "
++   "%select{cannot be narrowed from type %1 to %2|"
++   "evaluates to %1, which cannot be narrowed to type %2}0">;
++ def err_std_compare_type_not_supported : Error<
++   "standard library implementation of %0 is not supported; "
++    "%select{member '%2' does not have expected form|"
++    "member '%2' is missing|"
++    "the type is not trivially copyable|"
++    "the type does not have the expected form}1">;
++ def note_rewriting_operator_as_spaceship : Note<
++   "while rewriting comparison as call to 'operator<=>' declared here">;
++ def err_three_way_vector_comparison : Error<
++   "three-way comparison between vectors is not supported">;
++ 
++ // Memory Tagging Extensions (MTE) diagnostics
++ def err_memtag_arg_null_or_pointer : Error<
++   "%0 argument of MTE builtin function must be a null or a pointer (%1 invalid)">;
++ def err_memtag_any2arg_pointer : Error<
++   "at least one argument of MTE builtin function must be a pointer (%0, %1 invalid)">;
++ def err_memtag_arg_must_be_pointer : Error<
++   "%0 argument of MTE builtin function must be a pointer (%1 invalid)">;
++ def err_memtag_arg_must_be_integer : Error<
++   "%0 argument of MTE builtin function must be an integer type (%1 invalid)">;
++ 
++ def warn_dereference_of_noderef_type : Warning<
++   "dereferencing %0; was declared with a 'noderef' type">, InGroup<NoDeref>;
++ def warn_dereference_of_noderef_type_no_decl : Warning<
++   "dereferencing expression marked as 'noderef'">, InGroup<NoDeref>;
++ def warn_noderef_on_non_pointer_or_array : Warning<
++   "'noderef' can only be used on an array or pointer type">, InGroup<IgnoredAttributes>;
++ def warn_noderef_to_dereferenceable_pointer : Warning<
++   "casting to dereferenceable pointer removes 'noderef' attribute">, InGroup<NoDeref>;
++ 
++ def err_builtin_launder_invalid_arg : Error<
++   "%select{non-pointer|function pointer|void pointer}0 argument to "
++   "'__builtin_launder' is not allowed">;
++ 
++ def err_builtin_matrix_disabled: Error<
++   "matrix types extension is disabled. Pass -fenable-matrix to enable it">;
++ def err_matrix_index_not_integer: Error<
++   "matrix %select{row|column}0 index is not an integer">;
++ def err_matrix_index_outside_range: Error<
++   "matrix %select{row|column}0 index is outside the allowed range [0, %1)">;
++ def err_matrix_incomplete_index: Error<
++   "single subscript expressions are not allowed for matrix values">;
++ def err_matrix_separate_incomplete_index: Error<
++   "matrix row and column subscripts cannot be separated by any expression">;
++ def err_matrix_subscript_comma: Error<
++   "comma expressions are not allowed as indices in matrix subscript expressions">;
++ def err_builtin_matrix_arg: Error<"1st argument must be a matrix">;
++ def err_builtin_matrix_scalar_unsigned_arg: Error<
++   "%0 argument must be a constant unsigned integer expression">;
++ def err_builtin_matrix_pointer_arg: Error<
++   "%ordinal0 argument must be a pointer to a valid matrix element type">;
++ def err_builtin_matrix_pointer_arg_mismatch: Error<
++   "the pointee of the 2nd argument must match the element type of the 1st argument (%0 != %1)">;
++ def err_builtin_matrix_store_to_const: Error<
++   "cannot store matrix to read-only pointer">;
++ def err_builtin_matrix_stride_too_small: Error<
++   "stride must be greater or equal to the number of rows">;
++ def err_builtin_matrix_invalid_dimension: Error<
++   "%0 dimension is outside the allowed range [1, %1]">;
++ 
++ def warn_mismatched_import : Warning<
++   "import %select{module|name}0 (%1) does not match the import %select{module|name}0 (%2) of the "
++   "previous declaration">,
++   InGroup<IgnoredAttributes>;
++ def warn_import_on_definition : Warning<
++   "import %select{module|name}0 cannot be applied to a function with a definition">,
++   InGroup<IgnoredAttributes>;
++ 
++ def err_preserve_field_info_not_field : Error<
++   "__builtin_preserve_field_info argument %0 not a field access">;
++ def err_preserve_field_info_not_const: Error<
++   "__builtin_preserve_field_info argument %0 not a constant">;
++ def err_btf_type_id_not_const: Error<
++   "__builtin_btf_type_id argument %0 not a constant">;
++ def err_preserve_type_info_invalid : Error<
++   "__builtin_preserve_type_info argument %0 invalid">;
++ def err_preserve_type_info_not_const: Error<
++   "__builtin_preserve_type_info argument %0 not a constant">;
++ def err_preserve_enum_value_invalid : Error<
++   "__builtin_preserve_enum_value argument %0 invalid">;
++ def err_preserve_enum_value_not_const: Error<
++   "__builtin_preserve_enum_value argument %0 not a constant">;
++ 
++ def err_bit_cast_non_trivially_copyable : Error<
++   "__builtin_bit_cast %select{source|destination}0 type must be trivially copyable">;
++ def err_bit_cast_type_size_mismatch : Error<
++   "__builtin_bit_cast source size does not equal destination size (%0 vs %1)">;
++ 
++ // SYCL-specific diagnostics
++ def warn_sycl_kernel_num_of_template_params : Warning<
++   "'sycl_kernel' attribute only applies to a function template with at least"
++   " two template parameters">, InGroup<IgnoredAttributes>;
++ def warn_sycl_kernel_invalid_template_param_type : Warning<
++   "template parameter of a function template with the 'sycl_kernel' attribute"
++   " cannot be a non-type template parameter">, InGroup<IgnoredAttributes>;
++ def warn_sycl_kernel_num_of_function_params : Warning<
++   "function template with 'sycl_kernel' attribute must have a single parameter">,
++   InGroup<IgnoredAttributes>;
++ def warn_sycl_kernel_return_type : Warning<
++   "function template with 'sycl_kernel' attribute must have a 'void' return type">,
++   InGroup<IgnoredAttributes>;
++ 
++ def err_ext_int_bad_size : Error<"%select{signed|unsigned}0 _ExtInt must "
++                                  "have a bit size of at least %select{2|1}0">;
++ def err_ext_int_max_size : Error<"%select{signed|unsigned}0 _ExtInt of bit "
++                                  "sizes greater than %1 not supported">;
++ 
++ // errors of expect.with.probability
++ def err_probability_not_constant_float : Error<
++    "probability argument to __builtin_expect_with_probability must be constant "
++    "floating-point expression">;
++ def err_probability_out_of_range : Error<
++    "probability argument to __builtin_expect_with_probability is outside the "
++    "range [0.0, 1.0]">;
++ 
++ // TCB warnings
++ def err_tcb_conflicting_attributes : Error<
++   "attributes '%0(\"%2\")' and '%1(\"%2\")' are mutually exclusive">;
++ def warn_tcb_enforcement_violation : Warning<
++   "calling %0 is a violation of trusted computing base '%1'">,
++   InGroup<DiagGroup<"tcb-enforcement">>;
++ 
++ // RISC-V builtin required extension warning
++ def err_riscv_builtin_requires_extension : Error<
++   "builtin requires '%0' extension support to be enabled">;
++ def err_riscv_builtin_invalid_lmul : Error<
++   "LMUL argument must be in the range [0,3] or [5,7]">;
++ } // end of sema component.
++diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
++index c3c653f6889e..0a414afc1616 100644
++--- a/clang/lib/Sema/SemaChecking.cpp
+++++ b/clang/lib/Sema/SemaChecking.cpp
++@@ -3221,13643 +3221,13655 @@ bool Sema::CheckMipsBuiltinArgument(unsigned BuiltinID, CallExpr *TheCall) {
++ /// advancing the pointer over the consumed characters. The decoded type is
++ /// returned. If the decoded type represents a constant integer with a
++ /// constraint on its value then Mask is set to that value. The type descriptors
++ /// used in Str are specific to PPC MMA builtins and are documented in the file
++ /// defining the PPC builtins.
++ static QualType DecodePPCMMATypeFromStr(ASTContext &Context, const char *&Str,
++                                         unsigned &Mask) {
++   bool RequireICE = false;
++   ASTContext::GetBuiltinTypeError Error = ASTContext::GE_None;
++   switch (*Str++) {
++   case 'V':
++     return Context.getVectorType(Context.UnsignedCharTy, 16,
++                                  VectorType::VectorKind::AltiVecVector);
++   case 'i': {
++     char *End;
++     unsigned size = strtoul(Str, &End, 10);
++     assert(End != Str && "Missing constant parameter constraint");
++     Str = End;
++     Mask = size;
++     return Context.IntTy;
++   }
++   case 'W': {
++     char *End;
++     unsigned size = strtoul(Str, &End, 10);
++     assert(End != Str && "Missing PowerPC MMA type size");
++     Str = End;
++     QualType Type;
++     switch (size) {
++   #define PPC_VECTOR_TYPE(typeName, Id, size) \
++     case size: Type = Context.Id##Ty; break;
++   #include "clang/Basic/PPCTypes.def"
++     default: llvm_unreachable("Invalid PowerPC MMA vector type");
++     }
++     bool CheckVectorArgs = false;
++     while (!CheckVectorArgs) {
++       switch (*Str++) {
++       case '*':
++         Type = Context.getPointerType(Type);
++         break;
++       case 'C':
++         Type = Type.withConst();
++         break;
++       default:
++         CheckVectorArgs = true;
++         --Str;
++         break;
++       }
++     }
++     return Type;
++   }
++   default:
++     return Context.DecodeTypeStr(--Str, Context, Error, RequireICE, true);
++   }
++ }
++ 
++ static bool isPPC_64Builtin(unsigned BuiltinID) {
++   // These builtins only work on PPC 64bit targets.
++   switch (BuiltinID) {
++   case PPC::BI__builtin_divde:
++   case PPC::BI__builtin_divdeu:
++   case PPC::BI__builtin_bpermd:
++   case PPC::BI__builtin_ppc_ldarx:
++   case PPC::BI__builtin_ppc_stdcx:
++   case PPC::BI__builtin_ppc_tdw:
++   case PPC::BI__builtin_ppc_trapd:
++   case PPC::BI__builtin_ppc_cmpeqb:
++   case PPC::BI__builtin_ppc_setb:
++   case PPC::BI__builtin_ppc_mulhd:
++   case PPC::BI__builtin_ppc_mulhdu:
++   case PPC::BI__builtin_ppc_maddhd:
++   case PPC::BI__builtin_ppc_maddhdu:
++   case PPC::BI__builtin_ppc_maddld:
++   case PPC::BI__builtin_ppc_load8r:
++   case PPC::BI__builtin_ppc_store8r:
++   case PPC::BI__builtin_ppc_insert_exp:
++   case PPC::BI__builtin_ppc_extract_sig:
++   case PPC::BI__builtin_ppc_addex:
++   case PPC::BI__builtin_darn:
++   case PPC::BI__builtin_darn_raw:
++     return true;
++   }
++   return false;
++ }
++ 
++ static bool SemaFeatureCheck(Sema &S, CallExpr *TheCall,
++                              StringRef FeatureToCheck, unsigned DiagID,
++                              StringRef DiagArg = "") {
++   if (S.Context.getTargetInfo().hasFeature(FeatureToCheck))
++     return false;
++ 
++   if (DiagArg.empty())
++     S.Diag(TheCall->getBeginLoc(), DiagID) << TheCall->getSourceRange();
++   else
++     S.Diag(TheCall->getBeginLoc(), DiagID)
++         << DiagArg << TheCall->getSourceRange();
++ 
++   return true;
++ }
++ 
++ /// Returns true if the argument consists of one contiguous run of 1s with any
++ /// number of 0s on either side. The 1s are allowed to wrap from LSB to MSB, so
++ /// 0x000FFF0, 0x0000FFFF, 0xFF0000FF, 0x0 are all runs. 0x0F0F0000 is not,
++ /// since all 1s are not contiguous.
++ bool Sema::SemaValueIsRunOfOnes(CallExpr *TheCall, unsigned ArgNum) {
++   llvm::APSInt Result;
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   // Check contiguous run of 1s, 0xFF0000FF is also a run of 1s.
++   if (Result.isShiftedMask() || (~Result).isShiftedMask())
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(),
++               diag::err_argument_not_contiguous_bit_field)
++          << ArgNum << Arg->getSourceRange();
++ }
++ 
++ bool Sema::CheckPPCBuiltinFunctionCall(const TargetInfo &TI, unsigned BuiltinID,
++                                        CallExpr *TheCall) {
++   unsigned i = 0, l = 0, u = 0;
++   bool IsTarget64Bit = TI.getTypeWidth(TI.getIntPtrType()) == 64;
++   llvm::APSInt Result;
++ 
++   if (isPPC_64Builtin(BuiltinID) && !IsTarget64Bit)
++     return Diag(TheCall->getBeginLoc(), diag::err_64_bit_builtin_32_bit_tgt)
++            << TheCall->getSourceRange();
++ 
++   switch (BuiltinID) {
++   default: return false;
++   case PPC::BI__builtin_altivec_crypto_vshasigmaw:
++   case PPC::BI__builtin_altivec_crypto_vshasigmad:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1) ||
++            SemaBuiltinConstantArgRange(TheCall, 2, 0, 15);
++   case PPC::BI__builtin_altivec_dss:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 3);
++   case PPC::BI__builtin_tbegin:
++   case PPC::BI__builtin_tend: i = 0; l = 0; u = 1; break;
++   case PPC::BI__builtin_tsr: i = 0; l = 0; u = 7; break;
++   case PPC::BI__builtin_tabortwc:
++   case PPC::BI__builtin_tabortdc: i = 0; l = 0; u = 31; break;
++   case PPC::BI__builtin_tabortwci:
++   case PPC::BI__builtin_tabortdci:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31) ||
++            SemaBuiltinConstantArgRange(TheCall, 2, 0, 31);
++   case PPC::BI__builtin_altivec_dst:
++   case PPC::BI__builtin_altivec_dstt:
++   case PPC::BI__builtin_altivec_dstst:
++   case PPC::BI__builtin_altivec_dststt:
++     return SemaBuiltinConstantArgRange(TheCall, 2, 0, 3);
++   case PPC::BI__builtin_vsx_xxpermdi:
++   case PPC::BI__builtin_vsx_xxsldwi:
++     return SemaBuiltinVSX(TheCall);
++   case PPC::BI__builtin_divwe:
++   case PPC::BI__builtin_divweu:
++   case PPC::BI__builtin_divde:
++   case PPC::BI__builtin_divdeu:
++     return SemaFeatureCheck(*this, TheCall, "extdiv",
++                             diag::err_ppc_builtin_only_on_arch, "7");
++   case PPC::BI__builtin_bpermd:
++     return SemaFeatureCheck(*this, TheCall, "bpermd",
++                             diag::err_ppc_builtin_only_on_arch, "7");
++   case PPC::BI__builtin_unpack_vector_int128:
++     return SemaFeatureCheck(*this, TheCall, "vsx",
++                             diag::err_ppc_builtin_only_on_arch, "7") ||
++            SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
++   case PPC::BI__builtin_pack_vector_int128:
++     return SemaFeatureCheck(*this, TheCall, "vsx",
++                             diag::err_ppc_builtin_only_on_arch, "7");
++   case PPC::BI__builtin_altivec_vgnb:
++      return SemaBuiltinConstantArgRange(TheCall, 1, 2, 7);
++   case PPC::BI__builtin_altivec_vec_replace_elt:
++   case PPC::BI__builtin_altivec_vec_replace_unaligned: {
++     QualType VecTy = TheCall->getArg(0)->getType();
++     QualType EltTy = TheCall->getArg(1)->getType();
++     unsigned Width = Context.getIntWidth(EltTy);
++     return SemaBuiltinConstantArgRange(TheCall, 2, 0, Width == 32 ? 12 : 8) ||
++            !isEltOfVectorTy(Context, TheCall, *this, VecTy, EltTy);
++   }
++   case PPC::BI__builtin_vsx_xxeval:
++      return SemaBuiltinConstantArgRange(TheCall, 3, 0, 255);
++   case PPC::BI__builtin_altivec_vsldbi:
++      return SemaBuiltinConstantArgRange(TheCall, 2, 0, 7);
++   case PPC::BI__builtin_altivec_vsrdbi:
++      return SemaBuiltinConstantArgRange(TheCall, 2, 0, 7);
++   case PPC::BI__builtin_vsx_xxpermx:
++      return SemaBuiltinConstantArgRange(TheCall, 3, 0, 7);
++   case PPC::BI__builtin_ppc_tw:
++   case PPC::BI__builtin_ppc_tdw:
++     return SemaBuiltinConstantArgRange(TheCall, 2, 1, 31);
++   case PPC::BI__builtin_ppc_cmpeqb:
++   case PPC::BI__builtin_ppc_setb:
++   case PPC::BI__builtin_ppc_maddhd:
++   case PPC::BI__builtin_ppc_maddhdu:
++   case PPC::BI__builtin_ppc_maddld:
++     return SemaFeatureCheck(*this, TheCall, "isa-v30-instructions",
++                             diag::err_ppc_builtin_only_on_arch, "9");
++   case PPC::BI__builtin_ppc_cmprb:
++     return SemaFeatureCheck(*this, TheCall, "isa-v30-instructions",
++                             diag::err_ppc_builtin_only_on_arch, "9") ||
++            SemaBuiltinConstantArgRange(TheCall, 0, 0, 1);
++   // For __rlwnm, __rlwimi and __rldimi, the last parameter mask must
++   // be a constant that represents a contiguous bit field.
++   case PPC::BI__builtin_ppc_rlwnm:
++     return SemaBuiltinConstantArg(TheCall, 1, Result) ||
++            SemaValueIsRunOfOnes(TheCall, 2);
++   case PPC::BI__builtin_ppc_rlwimi:
++   case PPC::BI__builtin_ppc_rldimi:
++     return SemaBuiltinConstantArg(TheCall, 2, Result) ||
++            SemaValueIsRunOfOnes(TheCall, 3);
++   case PPC::BI__builtin_ppc_extract_exp:
++   case PPC::BI__builtin_ppc_extract_sig:
++   case PPC::BI__builtin_ppc_insert_exp:
++     return SemaFeatureCheck(*this, TheCall, "power9-vector",
++                             diag::err_ppc_builtin_only_on_arch, "9");
++   case PPC::BI__builtin_ppc_addex: {
++     if (SemaFeatureCheck(*this, TheCall, "isa-v30-instructions",
++                          diag::err_ppc_builtin_only_on_arch, "9") ||
++         SemaBuiltinConstantArgRange(TheCall, 2, 0, 3))
++       return true;
++     // Output warning for reserved values 1 to 3.
++     int ArgValue =
++         TheCall->getArg(2)->getIntegerConstantExpr(Context)->getSExtValue();
++     if (ArgValue != 0)
++       Diag(TheCall->getBeginLoc(), diag::warn_argument_undefined_behaviour)
++           << ArgValue;
++     return false;
++   }
++   case PPC::BI__builtin_ppc_mtfsb0:
++   case PPC::BI__builtin_ppc_mtfsb1:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31);
++   case PPC::BI__builtin_ppc_mtfsf:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 255);
++   case PPC::BI__builtin_ppc_mtfsfi:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 7) ||
++            SemaBuiltinConstantArgRange(TheCall, 1, 0, 15);
++   case PPC::BI__builtin_ppc_alignx:
++     return SemaBuiltinConstantArgPower2(TheCall, 0);
++   case PPC::BI__builtin_ppc_rdlam:
++     return SemaValueIsRunOfOnes(TheCall, 2);
++   case PPC::BI__builtin_ppc_icbt:
++   case PPC::BI__builtin_ppc_sthcx:
++   case PPC::BI__builtin_ppc_stbcx:
++   case PPC::BI__builtin_ppc_lharx:
++   case PPC::BI__builtin_ppc_lbarx:
++     return SemaFeatureCheck(*this, TheCall, "isa-v207-instructions",
++                             diag::err_ppc_builtin_only_on_arch, "8");
++   case PPC::BI__builtin_vsx_ldrmb:
++   case PPC::BI__builtin_vsx_strmb:
++     return SemaFeatureCheck(*this, TheCall, "isa-v207-instructions",
++                             diag::err_ppc_builtin_only_on_arch, "8") ||
++            SemaBuiltinConstantArgRange(TheCall, 1, 1, 16);
++   case PPC::BI__builtin_altivec_vcntmbb:
++   case PPC::BI__builtin_altivec_vcntmbh:
++   case PPC::BI__builtin_altivec_vcntmbw:
++   case PPC::BI__builtin_altivec_vcntmbd:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
++   case PPC::BI__builtin_darn:
++   case PPC::BI__builtin_darn_raw:
++   case PPC::BI__builtin_darn_32:
++     return SemaFeatureCheck(*this, TheCall, "isa-v30-instructions",
++                             diag::err_ppc_builtin_only_on_arch, "9");
++   case PPC::BI__builtin_vsx_xxgenpcvbm:
++   case PPC::BI__builtin_vsx_xxgenpcvhm:
++   case PPC::BI__builtin_vsx_xxgenpcvwm:
++   case PPC::BI__builtin_vsx_xxgenpcvdm:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 3);
++ #define CUSTOM_BUILTIN(Name, Intr, Types, Acc) \
++   case PPC::BI__builtin_##Name: \
++     return SemaBuiltinPPCMMACall(TheCall, Types);
++ #include "clang/Basic/BuiltinsPPC.def"
++   }
++   return SemaBuiltinConstantArgRange(TheCall, i, l, u);
++ }
++ 
++ // Check if the given type is a non-pointer PPC MMA type. This function is used
++ // in Sema to prevent invalid uses of restricted PPC MMA types.
++ bool Sema::CheckPPCMMAType(QualType Type, SourceLocation TypeLoc) {
++   if (Type->isPointerType() || Type->isArrayType())
++     return false;
++ 
++   QualType CoreType = Type.getCanonicalType().getUnqualifiedType();
++ #define PPC_VECTOR_TYPE(Name, Id, Size) || CoreType == Context.Id##Ty
++   if (false
++ #include "clang/Basic/PPCTypes.def"
++      ) {
++     Diag(TypeLoc, diag::err_ppc_invalid_use_mma_type);
++     return true;
++   }
++   return false;
++ }
++ 
++ bool Sema::CheckAMDGCNBuiltinFunctionCall(unsigned BuiltinID,
++                                           CallExpr *TheCall) {
++   // position of memory order and scope arguments in the builtin
++   unsigned OrderIndex, ScopeIndex;
++   switch (BuiltinID) {
++   case AMDGPU::BI__builtin_amdgcn_atomic_inc32:
++   case AMDGPU::BI__builtin_amdgcn_atomic_inc64:
++   case AMDGPU::BI__builtin_amdgcn_atomic_dec32:
++   case AMDGPU::BI__builtin_amdgcn_atomic_dec64:
++     OrderIndex = 2;
++     ScopeIndex = 3;
++     break;
++   case AMDGPU::BI__builtin_amdgcn_fence:
++     OrderIndex = 0;
++     ScopeIndex = 1;
++     break;
++   default:
++     return false;
++   }
++ 
++   ExprResult Arg = TheCall->getArg(OrderIndex);
++   auto ArgExpr = Arg.get();
++   Expr::EvalResult ArgResult;
++ 
++   if (!ArgExpr->EvaluateAsInt(ArgResult, Context))
++     return Diag(ArgExpr->getExprLoc(), diag::err_typecheck_expect_int)
++            << ArgExpr->getType();
++   auto Ord = ArgResult.Val.getInt().getZExtValue();
++ 
++   // Check validity of memory ordering as per C11 / C++11's memody model.
++   // Only fence needs check. Atomic dec/inc allow all memory orders.
++   if (!llvm::isValidAtomicOrderingCABI(Ord))
++     return Diag(ArgExpr->getBeginLoc(),
++                 diag::warn_atomic_op_has_invalid_memory_order)
++            << ArgExpr->getSourceRange();
++   switch (static_cast<llvm::AtomicOrderingCABI>(Ord)) {
++   case llvm::AtomicOrderingCABI::relaxed:
++   case llvm::AtomicOrderingCABI::consume:
++     if (BuiltinID == AMDGPU::BI__builtin_amdgcn_fence)
++       return Diag(ArgExpr->getBeginLoc(),
++                   diag::warn_atomic_op_has_invalid_memory_order)
++              << ArgExpr->getSourceRange();
++     break;
++   case llvm::AtomicOrderingCABI::acquire:
++   case llvm::AtomicOrderingCABI::release:
++   case llvm::AtomicOrderingCABI::acq_rel:
++   case llvm::AtomicOrderingCABI::seq_cst:
++     break;
++   }
++ 
++   Arg = TheCall->getArg(ScopeIndex);
++   ArgExpr = Arg.get();
++   Expr::EvalResult ArgResult1;
++   // Check that sync scope is a constant literal
++   if (!ArgExpr->EvaluateAsConstantExpr(ArgResult1, Context))
++     return Diag(ArgExpr->getExprLoc(), diag::err_expr_not_string_literal)
++            << ArgExpr->getType();
++ 
++   return false;
++ }
++ 
++ bool Sema::CheckRISCVLMUL(CallExpr *TheCall, unsigned ArgNum) {
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   int64_t Val = Result.getSExtValue();
++   if ((Val >= 0 && Val <= 3) || (Val >= 5 && Val <= 7))
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(), diag::err_riscv_builtin_invalid_lmul)
++          << Arg->getSourceRange();
++ }
++ 
++ bool Sema::CheckRISCVBuiltinFunctionCall(const TargetInfo &TI,
++                                          unsigned BuiltinID,
++                                          CallExpr *TheCall) {
++   // CodeGenFunction can also detect this, but this gives a better error
++   // message.
++   bool FeatureMissing = false;
++   SmallVector<StringRef> ReqFeatures;
++   StringRef Features = Context.BuiltinInfo.getRequiredFeatures(BuiltinID);
++   Features.split(ReqFeatures, ',');
++ 
++   // Check if each required feature is included
++   for (StringRef F : ReqFeatures) {
++     if (TI.hasFeature(F))
++       continue;
++ 
++     // If the feature is 64bit, alter the string so it will print better in
++     // the diagnostic.
++     if (F == "64bit")
++       F = "RV64";
++ 
++     // Convert features like "zbr" and "experimental-zbr" to "Zbr".
++     F.consume_front("experimental-");
++     std::string FeatureStr = F.str();
++     FeatureStr[0] = std::toupper(FeatureStr[0]);
++ 
++     // Error message
++     FeatureMissing = true;
++     Diag(TheCall->getBeginLoc(), diag::err_riscv_builtin_requires_extension)
++         << TheCall->getSourceRange() << StringRef(FeatureStr);
++   }
++ 
++   if (FeatureMissing)
++     return true;
++ 
++   switch (BuiltinID) {
++   case RISCV::BI__builtin_rvv_vsetvli:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 3) ||
++            CheckRISCVLMUL(TheCall, 2);
++   case RISCV::BI__builtin_rvv_vsetvlimax:
++     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 3) ||
++            CheckRISCVLMUL(TheCall, 1);
++   case RISCV::BI__builtin_rvv_vget_v_i8m2_i8m1:
++   case RISCV::BI__builtin_rvv_vget_v_i16m2_i16m1:
++   case RISCV::BI__builtin_rvv_vget_v_i32m2_i32m1:
++   case RISCV::BI__builtin_rvv_vget_v_i64m2_i64m1:
++   case RISCV::BI__builtin_rvv_vget_v_f32m2_f32m1:
++   case RISCV::BI__builtin_rvv_vget_v_f64m2_f64m1:
++   case RISCV::BI__builtin_rvv_vget_v_u8m2_u8m1:
++   case RISCV::BI__builtin_rvv_vget_v_u16m2_u16m1:
++   case RISCV::BI__builtin_rvv_vget_v_u32m2_u32m1:
++   case RISCV::BI__builtin_rvv_vget_v_u64m2_u64m1:
++   case RISCV::BI__builtin_rvv_vget_v_i8m4_i8m2:
++   case RISCV::BI__builtin_rvv_vget_v_i16m4_i16m2:
++   case RISCV::BI__builtin_rvv_vget_v_i32m4_i32m2:
++   case RISCV::BI__builtin_rvv_vget_v_i64m4_i64m2:
++   case RISCV::BI__builtin_rvv_vget_v_f32m4_f32m2:
++   case RISCV::BI__builtin_rvv_vget_v_f64m4_f64m2:
++   case RISCV::BI__builtin_rvv_vget_v_u8m4_u8m2:
++   case RISCV::BI__builtin_rvv_vget_v_u16m4_u16m2:
++   case RISCV::BI__builtin_rvv_vget_v_u32m4_u32m2:
++   case RISCV::BI__builtin_rvv_vget_v_u64m4_u64m2:
++   case RISCV::BI__builtin_rvv_vget_v_i8m8_i8m4:
++   case RISCV::BI__builtin_rvv_vget_v_i16m8_i16m4:
++   case RISCV::BI__builtin_rvv_vget_v_i32m8_i32m4:
++   case RISCV::BI__builtin_rvv_vget_v_i64m8_i64m4:
++   case RISCV::BI__builtin_rvv_vget_v_f32m8_f32m4:
++   case RISCV::BI__builtin_rvv_vget_v_f64m8_f64m4:
++   case RISCV::BI__builtin_rvv_vget_v_u8m8_u8m4:
++   case RISCV::BI__builtin_rvv_vget_v_u16m8_u16m4:
++   case RISCV::BI__builtin_rvv_vget_v_u32m8_u32m4:
++   case RISCV::BI__builtin_rvv_vget_v_u64m8_u64m4:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
++   case RISCV::BI__builtin_rvv_vget_v_i8m4_i8m1:
++   case RISCV::BI__builtin_rvv_vget_v_i16m4_i16m1:
++   case RISCV::BI__builtin_rvv_vget_v_i32m4_i32m1:
++   case RISCV::BI__builtin_rvv_vget_v_i64m4_i64m1:
++   case RISCV::BI__builtin_rvv_vget_v_f32m4_f32m1:
++   case RISCV::BI__builtin_rvv_vget_v_f64m4_f64m1:
++   case RISCV::BI__builtin_rvv_vget_v_u8m4_u8m1:
++   case RISCV::BI__builtin_rvv_vget_v_u16m4_u16m1:
++   case RISCV::BI__builtin_rvv_vget_v_u32m4_u32m1:
++   case RISCV::BI__builtin_rvv_vget_v_u64m4_u64m1:
++   case RISCV::BI__builtin_rvv_vget_v_i8m8_i8m2:
++   case RISCV::BI__builtin_rvv_vget_v_i16m8_i16m2:
++   case RISCV::BI__builtin_rvv_vget_v_i32m8_i32m2:
++   case RISCV::BI__builtin_rvv_vget_v_i64m8_i64m2:
++   case RISCV::BI__builtin_rvv_vget_v_f32m8_f32m2:
++   case RISCV::BI__builtin_rvv_vget_v_f64m8_f64m2:
++   case RISCV::BI__builtin_rvv_vget_v_u8m8_u8m2:
++   case RISCV::BI__builtin_rvv_vget_v_u16m8_u16m2:
++   case RISCV::BI__builtin_rvv_vget_v_u32m8_u32m2:
++   case RISCV::BI__builtin_rvv_vget_v_u64m8_u64m2:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 3);
++   case RISCV::BI__builtin_rvv_vget_v_i8m8_i8m1:
++   case RISCV::BI__builtin_rvv_vget_v_i16m8_i16m1:
++   case RISCV::BI__builtin_rvv_vget_v_i32m8_i32m1:
++   case RISCV::BI__builtin_rvv_vget_v_i64m8_i64m1:
++   case RISCV::BI__builtin_rvv_vget_v_f32m8_f32m1:
++   case RISCV::BI__builtin_rvv_vget_v_f64m8_f64m1:
++   case RISCV::BI__builtin_rvv_vget_v_u8m8_u8m1:
++   case RISCV::BI__builtin_rvv_vget_v_u16m8_u16m1:
++   case RISCV::BI__builtin_rvv_vget_v_u32m8_u32m1:
++   case RISCV::BI__builtin_rvv_vget_v_u64m8_u64m1:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 7);
++   case RISCV::BI__builtin_rvv_vset_v_i8m1_i8m2:
++   case RISCV::BI__builtin_rvv_vset_v_i16m1_i16m2:
++   case RISCV::BI__builtin_rvv_vset_v_i32m1_i32m2:
++   case RISCV::BI__builtin_rvv_vset_v_i64m1_i64m2:
++   case RISCV::BI__builtin_rvv_vset_v_f32m1_f32m2:
++   case RISCV::BI__builtin_rvv_vset_v_f64m1_f64m2:
++   case RISCV::BI__builtin_rvv_vset_v_u8m1_u8m2:
++   case RISCV::BI__builtin_rvv_vset_v_u16m1_u16m2:
++   case RISCV::BI__builtin_rvv_vset_v_u32m1_u32m2:
++   case RISCV::BI__builtin_rvv_vset_v_u64m1_u64m2:
++   case RISCV::BI__builtin_rvv_vset_v_i8m2_i8m4:
++   case RISCV::BI__builtin_rvv_vset_v_i16m2_i16m4:
++   case RISCV::BI__builtin_rvv_vset_v_i32m2_i32m4:
++   case RISCV::BI__builtin_rvv_vset_v_i64m2_i64m4:
++   case RISCV::BI__builtin_rvv_vset_v_f32m2_f32m4:
++   case RISCV::BI__builtin_rvv_vset_v_f64m2_f64m4:
++   case RISCV::BI__builtin_rvv_vset_v_u8m2_u8m4:
++   case RISCV::BI__builtin_rvv_vset_v_u16m2_u16m4:
++   case RISCV::BI__builtin_rvv_vset_v_u32m2_u32m4:
++   case RISCV::BI__builtin_rvv_vset_v_u64m2_u64m4:
++   case RISCV::BI__builtin_rvv_vset_v_i8m4_i8m8:
++   case RISCV::BI__builtin_rvv_vset_v_i16m4_i16m8:
++   case RISCV::BI__builtin_rvv_vset_v_i32m4_i32m8:
++   case RISCV::BI__builtin_rvv_vset_v_i64m4_i64m8:
++   case RISCV::BI__builtin_rvv_vset_v_f32m4_f32m8:
++   case RISCV::BI__builtin_rvv_vset_v_f64m4_f64m8:
++   case RISCV::BI__builtin_rvv_vset_v_u8m4_u8m8:
++   case RISCV::BI__builtin_rvv_vset_v_u16m4_u16m8:
++   case RISCV::BI__builtin_rvv_vset_v_u32m4_u32m8:
++   case RISCV::BI__builtin_rvv_vset_v_u64m4_u64m8:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
++   case RISCV::BI__builtin_rvv_vset_v_i8m1_i8m4:
++   case RISCV::BI__builtin_rvv_vset_v_i16m1_i16m4:
++   case RISCV::BI__builtin_rvv_vset_v_i32m1_i32m4:
++   case RISCV::BI__builtin_rvv_vset_v_i64m1_i64m4:
++   case RISCV::BI__builtin_rvv_vset_v_f32m1_f32m4:
++   case RISCV::BI__builtin_rvv_vset_v_f64m1_f64m4:
++   case RISCV::BI__builtin_rvv_vset_v_u8m1_u8m4:
++   case RISCV::BI__builtin_rvv_vset_v_u16m1_u16m4:
++   case RISCV::BI__builtin_rvv_vset_v_u32m1_u32m4:
++   case RISCV::BI__builtin_rvv_vset_v_u64m1_u64m4:
++   case RISCV::BI__builtin_rvv_vset_v_i8m2_i8m8:
++   case RISCV::BI__builtin_rvv_vset_v_i16m2_i16m8:
++   case RISCV::BI__builtin_rvv_vset_v_i32m2_i32m8:
++   case RISCV::BI__builtin_rvv_vset_v_i64m2_i64m8:
++   case RISCV::BI__builtin_rvv_vset_v_f32m2_f32m8:
++   case RISCV::BI__builtin_rvv_vset_v_f64m2_f64m8:
++   case RISCV::BI__builtin_rvv_vset_v_u8m2_u8m8:
++   case RISCV::BI__builtin_rvv_vset_v_u16m2_u16m8:
++   case RISCV::BI__builtin_rvv_vset_v_u32m2_u32m8:
++   case RISCV::BI__builtin_rvv_vset_v_u64m2_u64m8:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 3);
++   case RISCV::BI__builtin_rvv_vset_v_i8m1_i8m8:
++   case RISCV::BI__builtin_rvv_vset_v_i16m1_i16m8:
++   case RISCV::BI__builtin_rvv_vset_v_i32m1_i32m8:
++   case RISCV::BI__builtin_rvv_vset_v_i64m1_i64m8:
++   case RISCV::BI__builtin_rvv_vset_v_f32m1_f32m8:
++   case RISCV::BI__builtin_rvv_vset_v_f64m1_f64m8:
++   case RISCV::BI__builtin_rvv_vset_v_u8m1_u8m8:
++   case RISCV::BI__builtin_rvv_vset_v_u16m1_u16m8:
++   case RISCV::BI__builtin_rvv_vset_v_u32m1_u32m8:
++   case RISCV::BI__builtin_rvv_vset_v_u64m1_u64m8:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 7);
++   }
++ 
++   return false;
++ }
++ 
++ bool Sema::CheckSystemZBuiltinFunctionCall(unsigned BuiltinID,
++                                            CallExpr *TheCall) {
++   if (BuiltinID == SystemZ::BI__builtin_tabort) {
++     Expr *Arg = TheCall->getArg(0);
++     if (Optional<llvm::APSInt> AbortCode = Arg->getIntegerConstantExpr(Context))
++       if (AbortCode->getSExtValue() >= 0 && AbortCode->getSExtValue() < 256)
++         return Diag(Arg->getBeginLoc(), diag::err_systemz_invalid_tabort_code)
++                << Arg->getSourceRange();
++   }
++ 
++   // For intrinsics which take an immediate value as part of the instruction,
++   // range check them here.
++   unsigned i = 0, l = 0, u = 0;
++   switch (BuiltinID) {
++   default: return false;
++   case SystemZ::BI__builtin_s390_lcbb: i = 1; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_verimb:
++   case SystemZ::BI__builtin_s390_verimh:
++   case SystemZ::BI__builtin_s390_verimf:
++   case SystemZ::BI__builtin_s390_verimg: i = 3; l = 0; u = 255; break;
++   case SystemZ::BI__builtin_s390_vfaeb:
++   case SystemZ::BI__builtin_s390_vfaeh:
++   case SystemZ::BI__builtin_s390_vfaef:
++   case SystemZ::BI__builtin_s390_vfaebs:
++   case SystemZ::BI__builtin_s390_vfaehs:
++   case SystemZ::BI__builtin_s390_vfaefs:
++   case SystemZ::BI__builtin_s390_vfaezb:
++   case SystemZ::BI__builtin_s390_vfaezh:
++   case SystemZ::BI__builtin_s390_vfaezf:
++   case SystemZ::BI__builtin_s390_vfaezbs:
++   case SystemZ::BI__builtin_s390_vfaezhs:
++   case SystemZ::BI__builtin_s390_vfaezfs: i = 2; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vfisb:
++   case SystemZ::BI__builtin_s390_vfidb:
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15) ||
++            SemaBuiltinConstantArgRange(TheCall, 2, 0, 15);
++   case SystemZ::BI__builtin_s390_vftcisb:
++   case SystemZ::BI__builtin_s390_vftcidb: i = 1; l = 0; u = 4095; break;
++   case SystemZ::BI__builtin_s390_vlbb: i = 1; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vpdi: i = 2; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vsldb: i = 2; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vstrcb:
++   case SystemZ::BI__builtin_s390_vstrch:
++   case SystemZ::BI__builtin_s390_vstrcf:
++   case SystemZ::BI__builtin_s390_vstrczb:
++   case SystemZ::BI__builtin_s390_vstrczh:
++   case SystemZ::BI__builtin_s390_vstrczf:
++   case SystemZ::BI__builtin_s390_vstrcbs:
++   case SystemZ::BI__builtin_s390_vstrchs:
++   case SystemZ::BI__builtin_s390_vstrcfs:
++   case SystemZ::BI__builtin_s390_vstrczbs:
++   case SystemZ::BI__builtin_s390_vstrczhs:
++   case SystemZ::BI__builtin_s390_vstrczfs: i = 3; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vmslg: i = 3; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vfminsb:
++   case SystemZ::BI__builtin_s390_vfmaxsb:
++   case SystemZ::BI__builtin_s390_vfmindb:
++   case SystemZ::BI__builtin_s390_vfmaxdb: i = 2; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vsld: i = 2; l = 0; u = 7; break;
++   case SystemZ::BI__builtin_s390_vsrd: i = 2; l = 0; u = 7; break;
++   case SystemZ::BI__builtin_s390_vclfnhs:
++   case SystemZ::BI__builtin_s390_vclfnls:
++   case SystemZ::BI__builtin_s390_vcfn:
++   case SystemZ::BI__builtin_s390_vcnf: i = 1; l = 0; u = 15; break;
++   case SystemZ::BI__builtin_s390_vcrnfs: i = 2; l = 0; u = 15; break;
++   }
++   return SemaBuiltinConstantArgRange(TheCall, i, l, u);
++ }
++ 
++ /// SemaBuiltinCpuSupports - Handle __builtin_cpu_supports(char *).
++ /// This checks that the target supports __builtin_cpu_supports and
++ /// that the string argument is constant and valid.
++ static bool SemaBuiltinCpuSupports(Sema &S, const TargetInfo &TI,
++                                    CallExpr *TheCall) {
++   Expr *Arg = TheCall->getArg(0);
++ 
++   // Check if the argument is a string literal.
++   if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
++     return S.Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
++            << Arg->getSourceRange();
++ 
++   // Check the contents of the string.
++   StringRef Feature =
++       cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
++   if (!TI.validateCpuSupports(Feature))
++     return S.Diag(TheCall->getBeginLoc(), diag::err_invalid_cpu_supports)
++            << Arg->getSourceRange();
++   return false;
++ }
++ 
++ /// SemaBuiltinCpuIs - Handle __builtin_cpu_is(char *).
++ /// This checks that the target supports __builtin_cpu_is and
++ /// that the string argument is constant and valid.
++ static bool SemaBuiltinCpuIs(Sema &S, const TargetInfo &TI, CallExpr *TheCall) {
++   Expr *Arg = TheCall->getArg(0);
++ 
++   // Check if the argument is a string literal.
++   if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
++     return S.Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
++            << Arg->getSourceRange();
++ 
++   // Check the contents of the string.
++   StringRef Feature =
++       cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
++   if (!TI.validateCpuIs(Feature))
++     return S.Diag(TheCall->getBeginLoc(), diag::err_invalid_cpu_is)
++            << Arg->getSourceRange();
++   return false;
++ }
++ 
++ // Check if the rounding mode is legal.
++ bool Sema::CheckX86BuiltinRoundingOrSAE(unsigned BuiltinID, CallExpr *TheCall) {
++   // Indicates if this instruction has rounding control or just SAE.
++   bool HasRC = false;
++ 
++   unsigned ArgNum = 0;
++   switch (BuiltinID) {
++   default:
++     return false;
++   case X86::BI__builtin_ia32_vcvttsd2si32:
++   case X86::BI__builtin_ia32_vcvttsd2si64:
++   case X86::BI__builtin_ia32_vcvttsd2usi32:
++   case X86::BI__builtin_ia32_vcvttsd2usi64:
++   case X86::BI__builtin_ia32_vcvttss2si32:
++   case X86::BI__builtin_ia32_vcvttss2si64:
++   case X86::BI__builtin_ia32_vcvttss2usi32:
++   case X86::BI__builtin_ia32_vcvttss2usi64:
++   case X86::BI__builtin_ia32_vcvttsh2si32:
++   case X86::BI__builtin_ia32_vcvttsh2si64:
++   case X86::BI__builtin_ia32_vcvttsh2usi32:
++   case X86::BI__builtin_ia32_vcvttsh2usi64:
++     ArgNum = 1;
++     break;
++   case X86::BI__builtin_ia32_maxpd512:
++   case X86::BI__builtin_ia32_maxps512:
++   case X86::BI__builtin_ia32_minpd512:
++   case X86::BI__builtin_ia32_minps512:
++   case X86::BI__builtin_ia32_maxph512:
++   case X86::BI__builtin_ia32_minph512:
++     ArgNum = 2;
++     break;
++   case X86::BI__builtin_ia32_vcvtph2pd512_mask:
++   case X86::BI__builtin_ia32_vcvtph2psx512_mask:
++   case X86::BI__builtin_ia32_cvtps2pd512_mask:
++   case X86::BI__builtin_ia32_cvttpd2dq512_mask:
++   case X86::BI__builtin_ia32_cvttpd2qq512_mask:
++   case X86::BI__builtin_ia32_cvttpd2udq512_mask:
++   case X86::BI__builtin_ia32_cvttpd2uqq512_mask:
++   case X86::BI__builtin_ia32_cvttps2dq512_mask:
++   case X86::BI__builtin_ia32_cvttps2qq512_mask:
++   case X86::BI__builtin_ia32_cvttps2udq512_mask:
++   case X86::BI__builtin_ia32_cvttps2uqq512_mask:
++   case X86::BI__builtin_ia32_vcvttph2w512_mask:
++   case X86::BI__builtin_ia32_vcvttph2uw512_mask:
++   case X86::BI__builtin_ia32_vcvttph2dq512_mask:
++   case X86::BI__builtin_ia32_vcvttph2udq512_mask:
++   case X86::BI__builtin_ia32_vcvttph2qq512_mask:
++   case X86::BI__builtin_ia32_vcvttph2uqq512_mask:
++   case X86::BI__builtin_ia32_exp2pd_mask:
++   case X86::BI__builtin_ia32_exp2ps_mask:
++   case X86::BI__builtin_ia32_getexppd512_mask:
++   case X86::BI__builtin_ia32_getexpps512_mask:
++   case X86::BI__builtin_ia32_getexpph512_mask:
++   case X86::BI__builtin_ia32_rcp28pd_mask:
++   case X86::BI__builtin_ia32_rcp28ps_mask:
++   case X86::BI__builtin_ia32_rsqrt28pd_mask:
++   case X86::BI__builtin_ia32_rsqrt28ps_mask:
++   case X86::BI__builtin_ia32_vcomisd:
++   case X86::BI__builtin_ia32_vcomiss:
++   case X86::BI__builtin_ia32_vcomish:
++   case X86::BI__builtin_ia32_vcvtph2ps512_mask:
++     ArgNum = 3;
++     break;
++   case X86::BI__builtin_ia32_cmppd512_mask:
++   case X86::BI__builtin_ia32_cmpps512_mask:
++   case X86::BI__builtin_ia32_cmpsd_mask:
++   case X86::BI__builtin_ia32_cmpss_mask:
++   case X86::BI__builtin_ia32_cmpsh_mask:
++   case X86::BI__builtin_ia32_vcvtsh2sd_round_mask:
++   case X86::BI__builtin_ia32_vcvtsh2ss_round_mask:
++   case X86::BI__builtin_ia32_cvtss2sd_round_mask:
++   case X86::BI__builtin_ia32_getexpsd128_round_mask:
++   case X86::BI__builtin_ia32_getexpss128_round_mask:
++   case X86::BI__builtin_ia32_getexpsh128_round_mask:
++   case X86::BI__builtin_ia32_getmantpd512_mask:
++   case X86::BI__builtin_ia32_getmantps512_mask:
++   case X86::BI__builtin_ia32_getmantph512_mask:
++   case X86::BI__builtin_ia32_maxsd_round_mask:
++   case X86::BI__builtin_ia32_maxss_round_mask:
++   case X86::BI__builtin_ia32_maxsh_round_mask:
++   case X86::BI__builtin_ia32_minsd_round_mask:
++   case X86::BI__builtin_ia32_minss_round_mask:
++   case X86::BI__builtin_ia32_minsh_round_mask:
++   case X86::BI__builtin_ia32_rcp28sd_round_mask:
++   case X86::BI__builtin_ia32_rcp28ss_round_mask:
++   case X86::BI__builtin_ia32_reducepd512_mask:
++   case X86::BI__builtin_ia32_reduceps512_mask:
++   case X86::BI__builtin_ia32_reduceph512_mask:
++   case X86::BI__builtin_ia32_rndscalepd_mask:
++   case X86::BI__builtin_ia32_rndscaleps_mask:
++   case X86::BI__builtin_ia32_rndscaleph_mask:
++   case X86::BI__builtin_ia32_rsqrt28sd_round_mask:
++   case X86::BI__builtin_ia32_rsqrt28ss_round_mask:
++     ArgNum = 4;
++     break;
++   case X86::BI__builtin_ia32_fixupimmpd512_mask:
++   case X86::BI__builtin_ia32_fixupimmpd512_maskz:
++   case X86::BI__builtin_ia32_fixupimmps512_mask:
++   case X86::BI__builtin_ia32_fixupimmps512_maskz:
++   case X86::BI__builtin_ia32_fixupimmsd_mask:
++   case X86::BI__builtin_ia32_fixupimmsd_maskz:
++   case X86::BI__builtin_ia32_fixupimmss_mask:
++   case X86::BI__builtin_ia32_fixupimmss_maskz:
++   case X86::BI__builtin_ia32_getmantsd_round_mask:
++   case X86::BI__builtin_ia32_getmantss_round_mask:
++   case X86::BI__builtin_ia32_getmantsh_round_mask:
++   case X86::BI__builtin_ia32_rangepd512_mask:
++   case X86::BI__builtin_ia32_rangeps512_mask:
++   case X86::BI__builtin_ia32_rangesd128_round_mask:
++   case X86::BI__builtin_ia32_rangess128_round_mask:
++   case X86::BI__builtin_ia32_reducesd_mask:
++   case X86::BI__builtin_ia32_reducess_mask:
++   case X86::BI__builtin_ia32_reducesh_mask:
++   case X86::BI__builtin_ia32_rndscalesd_round_mask:
++   case X86::BI__builtin_ia32_rndscaless_round_mask:
++   case X86::BI__builtin_ia32_rndscalesh_round_mask:
++     ArgNum = 5;
++     break;
++   case X86::BI__builtin_ia32_vcvtsd2si64:
++   case X86::BI__builtin_ia32_vcvtsd2si32:
++   case X86::BI__builtin_ia32_vcvtsd2usi32:
++   case X86::BI__builtin_ia32_vcvtsd2usi64:
++   case X86::BI__builtin_ia32_vcvtss2si32:
++   case X86::BI__builtin_ia32_vcvtss2si64:
++   case X86::BI__builtin_ia32_vcvtss2usi32:
++   case X86::BI__builtin_ia32_vcvtss2usi64:
++   case X86::BI__builtin_ia32_vcvtsh2si32:
++   case X86::BI__builtin_ia32_vcvtsh2si64:
++   case X86::BI__builtin_ia32_vcvtsh2usi32:
++   case X86::BI__builtin_ia32_vcvtsh2usi64:
++   case X86::BI__builtin_ia32_sqrtpd512:
++   case X86::BI__builtin_ia32_sqrtps512:
++   case X86::BI__builtin_ia32_sqrtph512:
++     ArgNum = 1;
++     HasRC = true;
++     break;
++   case X86::BI__builtin_ia32_addph512:
++   case X86::BI__builtin_ia32_divph512:
++   case X86::BI__builtin_ia32_mulph512:
++   case X86::BI__builtin_ia32_subph512:
++   case X86::BI__builtin_ia32_addpd512:
++   case X86::BI__builtin_ia32_addps512:
++   case X86::BI__builtin_ia32_divpd512:
++   case X86::BI__builtin_ia32_divps512:
++   case X86::BI__builtin_ia32_mulpd512:
++   case X86::BI__builtin_ia32_mulps512:
++   case X86::BI__builtin_ia32_subpd512:
++   case X86::BI__builtin_ia32_subps512:
++   case X86::BI__builtin_ia32_cvtsi2sd64:
++   case X86::BI__builtin_ia32_cvtsi2ss32:
++   case X86::BI__builtin_ia32_cvtsi2ss64:
++   case X86::BI__builtin_ia32_cvtusi2sd64:
++   case X86::BI__builtin_ia32_cvtusi2ss32:
++   case X86::BI__builtin_ia32_cvtusi2ss64:
++   case X86::BI__builtin_ia32_vcvtusi2sh:
++   case X86::BI__builtin_ia32_vcvtusi642sh:
++   case X86::BI__builtin_ia32_vcvtsi2sh:
++   case X86::BI__builtin_ia32_vcvtsi642sh:
++     ArgNum = 2;
++     HasRC = true;
++     break;
++   case X86::BI__builtin_ia32_cvtdq2ps512_mask:
++   case X86::BI__builtin_ia32_cvtudq2ps512_mask:
++   case X86::BI__builtin_ia32_vcvtpd2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtps2phx512_mask:
++   case X86::BI__builtin_ia32_cvtpd2ps512_mask:
++   case X86::BI__builtin_ia32_cvtpd2dq512_mask:
++   case X86::BI__builtin_ia32_cvtpd2qq512_mask:
++   case X86::BI__builtin_ia32_cvtpd2udq512_mask:
++   case X86::BI__builtin_ia32_cvtpd2uqq512_mask:
++   case X86::BI__builtin_ia32_cvtps2dq512_mask:
++   case X86::BI__builtin_ia32_cvtps2qq512_mask:
++   case X86::BI__builtin_ia32_cvtps2udq512_mask:
++   case X86::BI__builtin_ia32_cvtps2uqq512_mask:
++   case X86::BI__builtin_ia32_cvtqq2pd512_mask:
++   case X86::BI__builtin_ia32_cvtqq2ps512_mask:
++   case X86::BI__builtin_ia32_cvtuqq2pd512_mask:
++   case X86::BI__builtin_ia32_cvtuqq2ps512_mask:
++   case X86::BI__builtin_ia32_vcvtdq2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtudq2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtw2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtuw2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtph2w512_mask:
++   case X86::BI__builtin_ia32_vcvtph2uw512_mask:
++   case X86::BI__builtin_ia32_vcvtph2dq512_mask:
++   case X86::BI__builtin_ia32_vcvtph2udq512_mask:
++   case X86::BI__builtin_ia32_vcvtph2qq512_mask:
++   case X86::BI__builtin_ia32_vcvtph2uqq512_mask:
++   case X86::BI__builtin_ia32_vcvtqq2ph512_mask:
++   case X86::BI__builtin_ia32_vcvtuqq2ph512_mask:
++     ArgNum = 3;
++     HasRC = true;
++     break;
++   case X86::BI__builtin_ia32_addsh_round_mask:
++   case X86::BI__builtin_ia32_addss_round_mask:
++   case X86::BI__builtin_ia32_addsd_round_mask:
++   case X86::BI__builtin_ia32_divsh_round_mask:
++   case X86::BI__builtin_ia32_divss_round_mask:
++   case X86::BI__builtin_ia32_divsd_round_mask:
++   case X86::BI__builtin_ia32_mulsh_round_mask:
++   case X86::BI__builtin_ia32_mulss_round_mask:
++   case X86::BI__builtin_ia32_mulsd_round_mask:
++   case X86::BI__builtin_ia32_subsh_round_mask:
++   case X86::BI__builtin_ia32_subss_round_mask:
++   case X86::BI__builtin_ia32_subsd_round_mask:
++   case X86::BI__builtin_ia32_scalefph512_mask:
++   case X86::BI__builtin_ia32_scalefpd512_mask:
++   case X86::BI__builtin_ia32_scalefps512_mask:
++   case X86::BI__builtin_ia32_scalefsd_round_mask:
++   case X86::BI__builtin_ia32_scalefss_round_mask:
++   case X86::BI__builtin_ia32_scalefsh_round_mask:
++   case X86::BI__builtin_ia32_cvtsd2ss_round_mask:
++   case X86::BI__builtin_ia32_vcvtss2sh_round_mask:
++   case X86::BI__builtin_ia32_vcvtsd2sh_round_mask:
++   case X86::BI__builtin_ia32_sqrtsd_round_mask:
++   case X86::BI__builtin_ia32_sqrtss_round_mask:
++   case X86::BI__builtin_ia32_sqrtsh_round_mask:
++   case X86::BI__builtin_ia32_vfmaddsd3_mask:
++   case X86::BI__builtin_ia32_vfmaddsd3_maskz:
++   case X86::BI__builtin_ia32_vfmaddsd3_mask3:
++   case X86::BI__builtin_ia32_vfmaddss3_mask:
++   case X86::BI__builtin_ia32_vfmaddss3_maskz:
++   case X86::BI__builtin_ia32_vfmaddss3_mask3:
++   case X86::BI__builtin_ia32_vfmaddsh3_mask:
++   case X86::BI__builtin_ia32_vfmaddsh3_maskz:
++   case X86::BI__builtin_ia32_vfmaddsh3_mask3:
++   case X86::BI__builtin_ia32_vfmaddpd512_mask:
++   case X86::BI__builtin_ia32_vfmaddpd512_maskz:
++   case X86::BI__builtin_ia32_vfmaddpd512_mask3:
++   case X86::BI__builtin_ia32_vfmsubpd512_mask3:
++   case X86::BI__builtin_ia32_vfmaddps512_mask:
++   case X86::BI__builtin_ia32_vfmaddps512_maskz:
++   case X86::BI__builtin_ia32_vfmaddps512_mask3:
++   case X86::BI__builtin_ia32_vfmsubps512_mask3:
++   case X86::BI__builtin_ia32_vfmaddph512_mask:
++   case X86::BI__builtin_ia32_vfmaddph512_maskz:
++   case X86::BI__builtin_ia32_vfmaddph512_mask3:
++   case X86::BI__builtin_ia32_vfmsubph512_mask3:
++   case X86::BI__builtin_ia32_vfmaddsubpd512_mask:
++   case X86::BI__builtin_ia32_vfmaddsubpd512_maskz:
++   case X86::BI__builtin_ia32_vfmaddsubpd512_mask3:
++   case X86::BI__builtin_ia32_vfmsubaddpd512_mask3:
++   case X86::BI__builtin_ia32_vfmaddsubps512_mask:
++   case X86::BI__builtin_ia32_vfmaddsubps512_maskz:
++   case X86::BI__builtin_ia32_vfmaddsubps512_mask3:
++   case X86::BI__builtin_ia32_vfmsubaddps512_mask3:
++   case X86::BI__builtin_ia32_vfmaddsubph512_mask:
++   case X86::BI__builtin_ia32_vfmaddsubph512_maskz:
++   case X86::BI__builtin_ia32_vfmaddsubph512_mask3:
++   case X86::BI__builtin_ia32_vfmsubaddph512_mask3:
++   case X86::BI__builtin_ia32_vfmaddcsh_mask:
++   case X86::BI__builtin_ia32_vfmaddcph512_mask:
++   case X86::BI__builtin_ia32_vfmaddcph512_maskz:
++   case X86::BI__builtin_ia32_vfcmaddcsh_mask:
++   case X86::BI__builtin_ia32_vfcmaddcph512_mask:
++   case X86::BI__builtin_ia32_vfcmaddcph512_maskz:
++   case X86::BI__builtin_ia32_vfmulcsh_mask:
++   case X86::BI__builtin_ia32_vfmulcph512_mask:
++   case X86::BI__builtin_ia32_vfcmulcsh_mask:
++   case X86::BI__builtin_ia32_vfcmulcph512_mask:
++     ArgNum = 4;
++     HasRC = true;
++     break;
++   }
++ 
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   // Make sure rounding mode is either ROUND_CUR_DIRECTION or ROUND_NO_EXC bit
++   // is set. If the intrinsic has rounding control(bits 1:0), make sure its only
++   // combined with ROUND_NO_EXC. If the intrinsic does not have rounding
++   // control, allow ROUND_NO_EXC and ROUND_CUR_DIRECTION together.
++   if (Result == 4/*ROUND_CUR_DIRECTION*/ ||
++       Result == 8/*ROUND_NO_EXC*/ ||
++       (!HasRC && Result == 12/*ROUND_CUR_DIRECTION|ROUND_NO_EXC*/) ||
++       (HasRC && Result.getZExtValue() >= 8 && Result.getZExtValue() <= 11))
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(), diag::err_x86_builtin_invalid_rounding)
++          << Arg->getSourceRange();
++ }
++ 
++ // Check if the gather/scatter scale is legal.
++ bool Sema::CheckX86BuiltinGatherScatterScale(unsigned BuiltinID,
++                                              CallExpr *TheCall) {
++   unsigned ArgNum = 0;
++   switch (BuiltinID) {
++   default:
++     return false;
++   case X86::BI__builtin_ia32_gatherpfdpd:
++   case X86::BI__builtin_ia32_gatherpfdps:
++   case X86::BI__builtin_ia32_gatherpfqpd:
++   case X86::BI__builtin_ia32_gatherpfqps:
++   case X86::BI__builtin_ia32_scatterpfdpd:
++   case X86::BI__builtin_ia32_scatterpfdps:
++   case X86::BI__builtin_ia32_scatterpfqpd:
++   case X86::BI__builtin_ia32_scatterpfqps:
++     ArgNum = 3;
++     break;
++   case X86::BI__builtin_ia32_gatherd_pd:
++   case X86::BI__builtin_ia32_gatherd_pd256:
++   case X86::BI__builtin_ia32_gatherq_pd:
++   case X86::BI__builtin_ia32_gatherq_pd256:
++   case X86::BI__builtin_ia32_gatherd_ps:
++   case X86::BI__builtin_ia32_gatherd_ps256:
++   case X86::BI__builtin_ia32_gatherq_ps:
++   case X86::BI__builtin_ia32_gatherq_ps256:
++   case X86::BI__builtin_ia32_gatherd_q:
++   case X86::BI__builtin_ia32_gatherd_q256:
++   case X86::BI__builtin_ia32_gatherq_q:
++   case X86::BI__builtin_ia32_gatherq_q256:
++   case X86::BI__builtin_ia32_gatherd_d:
++   case X86::BI__builtin_ia32_gatherd_d256:
++   case X86::BI__builtin_ia32_gatherq_d:
++   case X86::BI__builtin_ia32_gatherq_d256:
++   case X86::BI__builtin_ia32_gather3div2df:
++   case X86::BI__builtin_ia32_gather3div2di:
++   case X86::BI__builtin_ia32_gather3div4df:
++   case X86::BI__builtin_ia32_gather3div4di:
++   case X86::BI__builtin_ia32_gather3div4sf:
++   case X86::BI__builtin_ia32_gather3div4si:
++   case X86::BI__builtin_ia32_gather3div8sf:
++   case X86::BI__builtin_ia32_gather3div8si:
++   case X86::BI__builtin_ia32_gather3siv2df:
++   case X86::BI__builtin_ia32_gather3siv2di:
++   case X86::BI__builtin_ia32_gather3siv4df:
++   case X86::BI__builtin_ia32_gather3siv4di:
++   case X86::BI__builtin_ia32_gather3siv4sf:
++   case X86::BI__builtin_ia32_gather3siv4si:
++   case X86::BI__builtin_ia32_gather3siv8sf:
++   case X86::BI__builtin_ia32_gather3siv8si:
++   case X86::BI__builtin_ia32_gathersiv8df:
++   case X86::BI__builtin_ia32_gathersiv16sf:
++   case X86::BI__builtin_ia32_gatherdiv8df:
++   case X86::BI__builtin_ia32_gatherdiv16sf:
++   case X86::BI__builtin_ia32_gathersiv8di:
++   case X86::BI__builtin_ia32_gathersiv16si:
++   case X86::BI__builtin_ia32_gatherdiv8di:
++   case X86::BI__builtin_ia32_gatherdiv16si:
++   case X86::BI__builtin_ia32_scatterdiv2df:
++   case X86::BI__builtin_ia32_scatterdiv2di:
++   case X86::BI__builtin_ia32_scatterdiv4df:
++   case X86::BI__builtin_ia32_scatterdiv4di:
++   case X86::BI__builtin_ia32_scatterdiv4sf:
++   case X86::BI__builtin_ia32_scatterdiv4si:
++   case X86::BI__builtin_ia32_scatterdiv8sf:
++   case X86::BI__builtin_ia32_scatterdiv8si:
++   case X86::BI__builtin_ia32_scattersiv2df:
++   case X86::BI__builtin_ia32_scattersiv2di:
++   case X86::BI__builtin_ia32_scattersiv4df:
++   case X86::BI__builtin_ia32_scattersiv4di:
++   case X86::BI__builtin_ia32_scattersiv4sf:
++   case X86::BI__builtin_ia32_scattersiv4si:
++   case X86::BI__builtin_ia32_scattersiv8sf:
++   case X86::BI__builtin_ia32_scattersiv8si:
++   case X86::BI__builtin_ia32_scattersiv8df:
++   case X86::BI__builtin_ia32_scattersiv16sf:
++   case X86::BI__builtin_ia32_scatterdiv8df:
++   case X86::BI__builtin_ia32_scatterdiv16sf:
++   case X86::BI__builtin_ia32_scattersiv8di:
++   case X86::BI__builtin_ia32_scattersiv16si:
++   case X86::BI__builtin_ia32_scatterdiv8di:
++   case X86::BI__builtin_ia32_scatterdiv16si:
++     ArgNum = 4;
++     break;
++   }
++ 
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   if (Result == 1 || Result == 2 || Result == 4 || Result == 8)
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(), diag::err_x86_builtin_invalid_scale)
++          << Arg->getSourceRange();
++ }
++ 
++ enum { TileRegLow = 0, TileRegHigh = 7 };
++ 
++ bool Sema::CheckX86BuiltinTileArgumentsRange(CallExpr *TheCall,
++                                              ArrayRef<int> ArgNums) {
++   for (int ArgNum : ArgNums) {
++     if (SemaBuiltinConstantArgRange(TheCall, ArgNum, TileRegLow, TileRegHigh))
++       return true;
++   }
++   return false;
++ }
++ 
++ bool Sema::CheckX86BuiltinTileDuplicate(CallExpr *TheCall,
++                                         ArrayRef<int> ArgNums) {
++   // Because the max number of tile register is TileRegHigh + 1, so here we use
++   // each bit to represent the usage of them in bitset.
++   std::bitset<TileRegHigh + 1> ArgValues;
++   for (int ArgNum : ArgNums) {
++     Expr *Arg = TheCall->getArg(ArgNum);
++     if (Arg->isTypeDependent() || Arg->isValueDependent())
++       continue;
++ 
++     llvm::APSInt Result;
++     if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++       return true;
++     int ArgExtValue = Result.getExtValue();
++     assert((ArgExtValue >= TileRegLow || ArgExtValue <= TileRegHigh) &&
++            "Incorrect tile register num.");
++     if (ArgValues.test(ArgExtValue))
++       return Diag(TheCall->getBeginLoc(),
++                   diag::err_x86_builtin_tile_arg_duplicate)
++              << TheCall->getArg(ArgNum)->getSourceRange();
++     ArgValues.set(ArgExtValue);
++   }
++   return false;
++ }
++ 
++ bool Sema::CheckX86BuiltinTileRangeAndDuplicate(CallExpr *TheCall,
++                                                 ArrayRef<int> ArgNums) {
++   return CheckX86BuiltinTileArgumentsRange(TheCall, ArgNums) ||
++          CheckX86BuiltinTileDuplicate(TheCall, ArgNums);
++ }
++ 
++ bool Sema::CheckX86BuiltinTileArguments(unsigned BuiltinID, CallExpr *TheCall) {
++   switch (BuiltinID) {
++   default:
++     return false;
++   case X86::BI__builtin_ia32_tileloadd64:
++   case X86::BI__builtin_ia32_tileloaddt164:
++   case X86::BI__builtin_ia32_tilestored64:
++   case X86::BI__builtin_ia32_tilezero:
++     return CheckX86BuiltinTileArgumentsRange(TheCall, 0);
++   case X86::BI__builtin_ia32_tdpbssd:
++   case X86::BI__builtin_ia32_tdpbsud:
++   case X86::BI__builtin_ia32_tdpbusd:
++   case X86::BI__builtin_ia32_tdpbuud:
++   case X86::BI__builtin_ia32_tdpbf16ps:
++     return CheckX86BuiltinTileRangeAndDuplicate(TheCall, {0, 1, 2});
++   }
++ }
++ static bool isX86_32Builtin(unsigned BuiltinID) {
++   // These builtins only work on x86-32 targets.
++   switch (BuiltinID) {
++   case X86::BI__builtin_ia32_readeflags_u32:
++   case X86::BI__builtin_ia32_writeeflags_u32:
++     return true;
++   }
++ 
++   return false;
++ }
++ 
++ bool Sema::CheckX86BuiltinFunctionCall(const TargetInfo &TI, unsigned BuiltinID,
++                                        CallExpr *TheCall) {
++   if (BuiltinID == X86::BI__builtin_cpu_supports)
++     return SemaBuiltinCpuSupports(*this, TI, TheCall);
++ 
++   if (BuiltinID == X86::BI__builtin_cpu_is)
++     return SemaBuiltinCpuIs(*this, TI, TheCall);
++ 
++   // Check for 32-bit only builtins on a 64-bit target.
++   const llvm::Triple &TT = TI.getTriple();
++   if (TT.getArch() != llvm::Triple::x86 && isX86_32Builtin(BuiltinID))
++     return Diag(TheCall->getCallee()->getBeginLoc(),
++                 diag::err_32_bit_builtin_64_bit_tgt);
++ 
++   // If the intrinsic has rounding or SAE make sure its valid.
++   if (CheckX86BuiltinRoundingOrSAE(BuiltinID, TheCall))
++     return true;
++ 
++   // If the intrinsic has a gather/scatter scale immediate make sure its valid.
++   if (CheckX86BuiltinGatherScatterScale(BuiltinID, TheCall))
++     return true;
++ 
++   // If the intrinsic has a tile arguments, make sure they are valid.
++   if (CheckX86BuiltinTileArguments(BuiltinID, TheCall))
++     return true;
++ 
++   // For intrinsics which take an immediate value as part of the instruction,
++   // range check them here.
++   int i = 0, l = 0, u = 0;
++   switch (BuiltinID) {
++   default:
++     return false;
++   case X86::BI__builtin_ia32_vec_ext_v2si:
++   case X86::BI__builtin_ia32_vec_ext_v2di:
++   case X86::BI__builtin_ia32_vextractf128_pd256:
++   case X86::BI__builtin_ia32_vextractf128_ps256:
++   case X86::BI__builtin_ia32_vextractf128_si256:
++   case X86::BI__builtin_ia32_extract128i256:
++   case X86::BI__builtin_ia32_extractf64x4_mask:
++   case X86::BI__builtin_ia32_extracti64x4_mask:
++   case X86::BI__builtin_ia32_extractf32x8_mask:
++   case X86::BI__builtin_ia32_extracti32x8_mask:
++   case X86::BI__builtin_ia32_extractf64x2_256_mask:
++   case X86::BI__builtin_ia32_extracti64x2_256_mask:
++   case X86::BI__builtin_ia32_extractf32x4_256_mask:
++   case X86::BI__builtin_ia32_extracti32x4_256_mask:
++     i = 1; l = 0; u = 1;
++     break;
++   case X86::BI__builtin_ia32_vec_set_v2di:
++   case X86::BI__builtin_ia32_vinsertf128_pd256:
++   case X86::BI__builtin_ia32_vinsertf128_ps256:
++   case X86::BI__builtin_ia32_vinsertf128_si256:
++   case X86::BI__builtin_ia32_insert128i256:
++   case X86::BI__builtin_ia32_insertf32x8:
++   case X86::BI__builtin_ia32_inserti32x8:
++   case X86::BI__builtin_ia32_insertf64x4:
++   case X86::BI__builtin_ia32_inserti64x4:
++   case X86::BI__builtin_ia32_insertf64x2_256:
++   case X86::BI__builtin_ia32_inserti64x2_256:
++   case X86::BI__builtin_ia32_insertf32x4_256:
++   case X86::BI__builtin_ia32_inserti32x4_256:
++     i = 2; l = 0; u = 1;
++     break;
++   case X86::BI__builtin_ia32_vpermilpd:
++   case X86::BI__builtin_ia32_vec_ext_v4hi:
++   case X86::BI__builtin_ia32_vec_ext_v4si:
++   case X86::BI__builtin_ia32_vec_ext_v4sf:
++   case X86::BI__builtin_ia32_vec_ext_v4di:
++   case X86::BI__builtin_ia32_extractf32x4_mask:
++   case X86::BI__builtin_ia32_extracti32x4_mask:
++   case X86::BI__builtin_ia32_extractf64x2_512_mask:
++   case X86::BI__builtin_ia32_extracti64x2_512_mask:
++     i = 1; l = 0; u = 3;
++     break;
++   case X86::BI_mm_prefetch:
++   case X86::BI__builtin_ia32_vec_ext_v8hi:
++   case X86::BI__builtin_ia32_vec_ext_v8si:
++     i = 1; l = 0; u = 7;
++     break;
++   case X86::BI__builtin_ia32_sha1rnds4:
++   case X86::BI__builtin_ia32_blendpd:
++   case X86::BI__builtin_ia32_shufpd:
++   case X86::BI__builtin_ia32_vec_set_v4hi:
++   case X86::BI__builtin_ia32_vec_set_v4si:
++   case X86::BI__builtin_ia32_vec_set_v4di:
++   case X86::BI__builtin_ia32_shuf_f32x4_256:
++   case X86::BI__builtin_ia32_shuf_f64x2_256:
++   case X86::BI__builtin_ia32_shuf_i32x4_256:
++   case X86::BI__builtin_ia32_shuf_i64x2_256:
++   case X86::BI__builtin_ia32_insertf64x2_512:
++   case X86::BI__builtin_ia32_inserti64x2_512:
++   case X86::BI__builtin_ia32_insertf32x4:
++   case X86::BI__builtin_ia32_inserti32x4:
++     i = 2; l = 0; u = 3;
++     break;
++   case X86::BI__builtin_ia32_vpermil2pd:
++   case X86::BI__builtin_ia32_vpermil2pd256:
++   case X86::BI__builtin_ia32_vpermil2ps:
++   case X86::BI__builtin_ia32_vpermil2ps256:
++     i = 3; l = 0; u = 3;
++     break;
++   case X86::BI__builtin_ia32_cmpb128_mask:
++   case X86::BI__builtin_ia32_cmpw128_mask:
++   case X86::BI__builtin_ia32_cmpd128_mask:
++   case X86::BI__builtin_ia32_cmpq128_mask:
++   case X86::BI__builtin_ia32_cmpb256_mask:
++   case X86::BI__builtin_ia32_cmpw256_mask:
++   case X86::BI__builtin_ia32_cmpd256_mask:
++   case X86::BI__builtin_ia32_cmpq256_mask:
++   case X86::BI__builtin_ia32_cmpb512_mask:
++   case X86::BI__builtin_ia32_cmpw512_mask:
++   case X86::BI__builtin_ia32_cmpd512_mask:
++   case X86::BI__builtin_ia32_cmpq512_mask:
++   case X86::BI__builtin_ia32_ucmpb128_mask:
++   case X86::BI__builtin_ia32_ucmpw128_mask:
++   case X86::BI__builtin_ia32_ucmpd128_mask:
++   case X86::BI__builtin_ia32_ucmpq128_mask:
++   case X86::BI__builtin_ia32_ucmpb256_mask:
++   case X86::BI__builtin_ia32_ucmpw256_mask:
++   case X86::BI__builtin_ia32_ucmpd256_mask:
++   case X86::BI__builtin_ia32_ucmpq256_mask:
++   case X86::BI__builtin_ia32_ucmpb512_mask:
++   case X86::BI__builtin_ia32_ucmpw512_mask:
++   case X86::BI__builtin_ia32_ucmpd512_mask:
++   case X86::BI__builtin_ia32_ucmpq512_mask:
++   case X86::BI__builtin_ia32_vpcomub:
++   case X86::BI__builtin_ia32_vpcomuw:
++   case X86::BI__builtin_ia32_vpcomud:
++   case X86::BI__builtin_ia32_vpcomuq:
++   case X86::BI__builtin_ia32_vpcomb:
++   case X86::BI__builtin_ia32_vpcomw:
++   case X86::BI__builtin_ia32_vpcomd:
++   case X86::BI__builtin_ia32_vpcomq:
++   case X86::BI__builtin_ia32_vec_set_v8hi:
++   case X86::BI__builtin_ia32_vec_set_v8si:
++     i = 2; l = 0; u = 7;
++     break;
++   case X86::BI__builtin_ia32_vpermilpd256:
++   case X86::BI__builtin_ia32_roundps:
++   case X86::BI__builtin_ia32_roundpd:
++   case X86::BI__builtin_ia32_roundps256:
++   case X86::BI__builtin_ia32_roundpd256:
++   case X86::BI__builtin_ia32_getmantpd128_mask:
++   case X86::BI__builtin_ia32_getmantpd256_mask:
++   case X86::BI__builtin_ia32_getmantps128_mask:
++   case X86::BI__builtin_ia32_getmantps256_mask:
++   case X86::BI__builtin_ia32_getmantpd512_mask:
++   case X86::BI__builtin_ia32_getmantps512_mask:
++   case X86::BI__builtin_ia32_getmantph128_mask:
++   case X86::BI__builtin_ia32_getmantph256_mask:
++   case X86::BI__builtin_ia32_getmantph512_mask:
++   case X86::BI__builtin_ia32_vec_ext_v16qi:
++   case X86::BI__builtin_ia32_vec_ext_v16hi:
++     i = 1; l = 0; u = 15;
++     break;
++   case X86::BI__builtin_ia32_pblendd128:
++   case X86::BI__builtin_ia32_blendps:
++   case X86::BI__builtin_ia32_blendpd256:
++   case X86::BI__builtin_ia32_shufpd256:
++   case X86::BI__builtin_ia32_roundss:
++   case X86::BI__builtin_ia32_roundsd:
++   case X86::BI__builtin_ia32_rangepd128_mask:
++   case X86::BI__builtin_ia32_rangepd256_mask:
++   case X86::BI__builtin_ia32_rangepd512_mask:
++   case X86::BI__builtin_ia32_rangeps128_mask:
++   case X86::BI__builtin_ia32_rangeps256_mask:
++   case X86::BI__builtin_ia32_rangeps512_mask:
++   case X86::BI__builtin_ia32_getmantsd_round_mask:
++   case X86::BI__builtin_ia32_getmantss_round_mask:
++   case X86::BI__builtin_ia32_getmantsh_round_mask:
++   case X86::BI__builtin_ia32_vec_set_v16qi:
++   case X86::BI__builtin_ia32_vec_set_v16hi:
++     i = 2; l = 0; u = 15;
++     break;
++   case X86::BI__builtin_ia32_vec_ext_v32qi:
++     i = 1; l = 0; u = 31;
++     break;
++   case X86::BI__builtin_ia32_cmpps:
++   case X86::BI__builtin_ia32_cmpss:
++   case X86::BI__builtin_ia32_cmppd:
++   case X86::BI__builtin_ia32_cmpsd:
++   case X86::BI__builtin_ia32_cmpps256:
++   case X86::BI__builtin_ia32_cmppd256:
++   case X86::BI__builtin_ia32_cmpps128_mask:
++   case X86::BI__builtin_ia32_cmppd128_mask:
++   case X86::BI__builtin_ia32_cmpps256_mask:
++   case X86::BI__builtin_ia32_cmppd256_mask:
++   case X86::BI__builtin_ia32_cmpps512_mask:
++   case X86::BI__builtin_ia32_cmppd512_mask:
++   case X86::BI__builtin_ia32_cmpsd_mask:
++   case X86::BI__builtin_ia32_cmpss_mask:
++   case X86::BI__builtin_ia32_vec_set_v32qi:
++     i = 2; l = 0; u = 31;
++     break;
++   case X86::BI__builtin_ia32_permdf256:
++   case X86::BI__builtin_ia32_permdi256:
++   case X86::BI__builtin_ia32_permdf512:
++   case X86::BI__builtin_ia32_permdi512:
++   case X86::BI__builtin_ia32_vpermilps:
++   case X86::BI__builtin_ia32_vpermilps256:
++   case X86::BI__builtin_ia32_vpermilpd512:
++   case X86::BI__builtin_ia32_vpermilps512:
++   case X86::BI__builtin_ia32_pshufd:
++   case X86::BI__builtin_ia32_pshufd256:
++   case X86::BI__builtin_ia32_pshufd512:
++   case X86::BI__builtin_ia32_pshufhw:
++   case X86::BI__builtin_ia32_pshufhw256:
++   case X86::BI__builtin_ia32_pshufhw512:
++   case X86::BI__builtin_ia32_pshuflw:
++   case X86::BI__builtin_ia32_pshuflw256:
++   case X86::BI__builtin_ia32_pshuflw512:
++   case X86::BI__builtin_ia32_vcvtps2ph:
++   case X86::BI__builtin_ia32_vcvtps2ph_mask:
++   case X86::BI__builtin_ia32_vcvtps2ph256:
++   case X86::BI__builtin_ia32_vcvtps2ph256_mask:
++   case X86::BI__builtin_ia32_vcvtps2ph512_mask:
++   case X86::BI__builtin_ia32_rndscaleps_128_mask:
++   case X86::BI__builtin_ia32_rndscalepd_128_mask:
++   case X86::BI__builtin_ia32_rndscaleps_256_mask:
++   case X86::BI__builtin_ia32_rndscalepd_256_mask:
++   case X86::BI__builtin_ia32_rndscaleps_mask:
++   case X86::BI__builtin_ia32_rndscalepd_mask:
++   case X86::BI__builtin_ia32_rndscaleph_mask:
++   case X86::BI__builtin_ia32_reducepd128_mask:
++   case X86::BI__builtin_ia32_reducepd256_mask:
++   case X86::BI__builtin_ia32_reducepd512_mask:
++   case X86::BI__builtin_ia32_reduceps128_mask:
++   case X86::BI__builtin_ia32_reduceps256_mask:
++   case X86::BI__builtin_ia32_reduceps512_mask:
++   case X86::BI__builtin_ia32_reduceph128_mask:
++   case X86::BI__builtin_ia32_reduceph256_mask:
++   case X86::BI__builtin_ia32_reduceph512_mask:
++   case X86::BI__builtin_ia32_prold512:
++   case X86::BI__builtin_ia32_prolq512:
++   case X86::BI__builtin_ia32_prold128:
++   case X86::BI__builtin_ia32_prold256:
++   case X86::BI__builtin_ia32_prolq128:
++   case X86::BI__builtin_ia32_prolq256:
++   case X86::BI__builtin_ia32_prord512:
++   case X86::BI__builtin_ia32_prorq512:
++   case X86::BI__builtin_ia32_prord128:
++   case X86::BI__builtin_ia32_prord256:
++   case X86::BI__builtin_ia32_prorq128:
++   case X86::BI__builtin_ia32_prorq256:
++   case X86::BI__builtin_ia32_fpclasspd128_mask:
++   case X86::BI__builtin_ia32_fpclasspd256_mask:
++   case X86::BI__builtin_ia32_fpclassps128_mask:
++   case X86::BI__builtin_ia32_fpclassps256_mask:
++   case X86::BI__builtin_ia32_fpclassps512_mask:
++   case X86::BI__builtin_ia32_fpclasspd512_mask:
++   case X86::BI__builtin_ia32_fpclassph128_mask:
++   case X86::BI__builtin_ia32_fpclassph256_mask:
++   case X86::BI__builtin_ia32_fpclassph512_mask:
++   case X86::BI__builtin_ia32_fpclasssd_mask:
++   case X86::BI__builtin_ia32_fpclassss_mask:
++   case X86::BI__builtin_ia32_fpclasssh_mask:
++   case X86::BI__builtin_ia32_pslldqi128_byteshift:
++   case X86::BI__builtin_ia32_pslldqi256_byteshift:
++   case X86::BI__builtin_ia32_pslldqi512_byteshift:
++   case X86::BI__builtin_ia32_psrldqi128_byteshift:
++   case X86::BI__builtin_ia32_psrldqi256_byteshift:
++   case X86::BI__builtin_ia32_psrldqi512_byteshift:
++   case X86::BI__builtin_ia32_kshiftliqi:
++   case X86::BI__builtin_ia32_kshiftlihi:
++   case X86::BI__builtin_ia32_kshiftlisi:
++   case X86::BI__builtin_ia32_kshiftlidi:
++   case X86::BI__builtin_ia32_kshiftriqi:
++   case X86::BI__builtin_ia32_kshiftrihi:
++   case X86::BI__builtin_ia32_kshiftrisi:
++   case X86::BI__builtin_ia32_kshiftridi:
++     i = 1; l = 0; u = 255;
++     break;
++   case X86::BI__builtin_ia32_vperm2f128_pd256:
++   case X86::BI__builtin_ia32_vperm2f128_ps256:
++   case X86::BI__builtin_ia32_vperm2f128_si256:
++   case X86::BI__builtin_ia32_permti256:
++   case X86::BI__builtin_ia32_pblendw128:
++   case X86::BI__builtin_ia32_pblendw256:
++   case X86::BI__builtin_ia32_blendps256:
++   case X86::BI__builtin_ia32_pblendd256:
++   case X86::BI__builtin_ia32_palignr128:
++   case X86::BI__builtin_ia32_palignr256:
++   case X86::BI__builtin_ia32_palignr512:
++   case X86::BI__builtin_ia32_alignq512:
++   case X86::BI__builtin_ia32_alignd512:
++   case X86::BI__builtin_ia32_alignd128:
++   case X86::BI__builtin_ia32_alignd256:
++   case X86::BI__builtin_ia32_alignq128:
++   case X86::BI__builtin_ia32_alignq256:
++   case X86::BI__builtin_ia32_vcomisd:
++   case X86::BI__builtin_ia32_vcomiss:
++   case X86::BI__builtin_ia32_shuf_f32x4:
++   case X86::BI__builtin_ia32_shuf_f64x2:
++   case X86::BI__builtin_ia32_shuf_i32x4:
++   case X86::BI__builtin_ia32_shuf_i64x2:
++   case X86::BI__builtin_ia32_shufpd512:
++   case X86::BI__builtin_ia32_shufps:
++   case X86::BI__builtin_ia32_shufps256:
++   case X86::BI__builtin_ia32_shufps512:
++   case X86::BI__builtin_ia32_dbpsadbw128:
++   case X86::BI__builtin_ia32_dbpsadbw256:
++   case X86::BI__builtin_ia32_dbpsadbw512:
++   case X86::BI__builtin_ia32_vpshldd128:
++   case X86::BI__builtin_ia32_vpshldd256:
++   case X86::BI__builtin_ia32_vpshldd512:
++   case X86::BI__builtin_ia32_vpshldq128:
++   case X86::BI__builtin_ia32_vpshldq256:
++   case X86::BI__builtin_ia32_vpshldq512:
++   case X86::BI__builtin_ia32_vpshldw128:
++   case X86::BI__builtin_ia32_vpshldw256:
++   case X86::BI__builtin_ia32_vpshldw512:
++   case X86::BI__builtin_ia32_vpshrdd128:
++   case X86::BI__builtin_ia32_vpshrdd256:
++   case X86::BI__builtin_ia32_vpshrdd512:
++   case X86::BI__builtin_ia32_vpshrdq128:
++   case X86::BI__builtin_ia32_vpshrdq256:
++   case X86::BI__builtin_ia32_vpshrdq512:
++   case X86::BI__builtin_ia32_vpshrdw128:
++   case X86::BI__builtin_ia32_vpshrdw256:
++   case X86::BI__builtin_ia32_vpshrdw512:
++     i = 2; l = 0; u = 255;
++     break;
++   case X86::BI__builtin_ia32_fixupimmpd512_mask:
++   case X86::BI__builtin_ia32_fixupimmpd512_maskz:
++   case X86::BI__builtin_ia32_fixupimmps512_mask:
++   case X86::BI__builtin_ia32_fixupimmps512_maskz:
++   case X86::BI__builtin_ia32_fixupimmsd_mask:
++   case X86::BI__builtin_ia32_fixupimmsd_maskz:
++   case X86::BI__builtin_ia32_fixupimmss_mask:
++   case X86::BI__builtin_ia32_fixupimmss_maskz:
++   case X86::BI__builtin_ia32_fixupimmpd128_mask:
++   case X86::BI__builtin_ia32_fixupimmpd128_maskz:
++   case X86::BI__builtin_ia32_fixupimmpd256_mask:
++   case X86::BI__builtin_ia32_fixupimmpd256_maskz:
++   case X86::BI__builtin_ia32_fixupimmps128_mask:
++   case X86::BI__builtin_ia32_fixupimmps128_maskz:
++   case X86::BI__builtin_ia32_fixupimmps256_mask:
++   case X86::BI__builtin_ia32_fixupimmps256_maskz:
++   case X86::BI__builtin_ia32_pternlogd512_mask:
++   case X86::BI__builtin_ia32_pternlogd512_maskz:
++   case X86::BI__builtin_ia32_pternlogq512_mask:
++   case X86::BI__builtin_ia32_pternlogq512_maskz:
++   case X86::BI__builtin_ia32_pternlogd128_mask:
++   case X86::BI__builtin_ia32_pternlogd128_maskz:
++   case X86::BI__builtin_ia32_pternlogd256_mask:
++   case X86::BI__builtin_ia32_pternlogd256_maskz:
++   case X86::BI__builtin_ia32_pternlogq128_mask:
++   case X86::BI__builtin_ia32_pternlogq128_maskz:
++   case X86::BI__builtin_ia32_pternlogq256_mask:
++   case X86::BI__builtin_ia32_pternlogq256_maskz:
++     i = 3; l = 0; u = 255;
++     break;
++   case X86::BI__builtin_ia32_gatherpfdpd:
++   case X86::BI__builtin_ia32_gatherpfdps:
++   case X86::BI__builtin_ia32_gatherpfqpd:
++   case X86::BI__builtin_ia32_gatherpfqps:
++   case X86::BI__builtin_ia32_scatterpfdpd:
++   case X86::BI__builtin_ia32_scatterpfdps:
++   case X86::BI__builtin_ia32_scatterpfqpd:
++   case X86::BI__builtin_ia32_scatterpfqps:
++     i = 4; l = 2; u = 3;
++     break;
++   case X86::BI__builtin_ia32_reducesd_mask:
++   case X86::BI__builtin_ia32_reducess_mask:
++   case X86::BI__builtin_ia32_rndscalesd_round_mask:
++   case X86::BI__builtin_ia32_rndscaless_round_mask:
++   case X86::BI__builtin_ia32_rndscalesh_round_mask:
++   case X86::BI__builtin_ia32_reducesh_mask:
++     i = 4; l = 0; u = 255;
++     break;
++   }
++ 
++   // Note that we don't force a hard error on the range check here, allowing
++   // template-generated or macro-generated dead code to potentially have out-of-
++   // range values. These need to code generate, but don't need to necessarily
++   // make any sense. We use a warning that defaults to an error.
++   return SemaBuiltinConstantArgRange(TheCall, i, l, u, /*RangeIsError*/ false);
++ }
++ 
++ /// Given a FunctionDecl's FormatAttr, attempts to populate the FomatStringInfo
++ /// parameter with the FormatAttr's correct format_idx and firstDataArg.
++ /// Returns true when the format fits the function and the FormatStringInfo has
++ /// been populated.
++ bool Sema::getFormatStringInfo(const FormatAttr *Format, bool IsCXXMember,
++                                FormatStringInfo *FSI) {
++   FSI->HasVAListArg = Format->getFirstArg() == 0;
++   FSI->FormatIdx = Format->getFormatIdx() - 1;
++   FSI->FirstDataArg = FSI->HasVAListArg ? 0 : Format->getFirstArg() - 1;
++ 
++   // The way the format attribute works in GCC, the implicit this argument
++   // of member functions is counted. However, it doesn't appear in our own
++   // lists, so decrement format_idx in that case.
++   if (IsCXXMember) {
++     if(FSI->FormatIdx == 0)
++       return false;
++     --FSI->FormatIdx;
++     if (FSI->FirstDataArg != 0)
++       --FSI->FirstDataArg;
++   }
++   return true;
++ }
++ 
++ /// Checks if a the given expression evaluates to null.
++ ///
++ /// Returns true if the value evaluates to null.
++ static bool CheckNonNullExpr(Sema &S, const Expr *Expr) {
++   // If the expression has non-null type, it doesn't evaluate to null.
++   if (auto nullability
++         = Expr->IgnoreImplicit()->getType()->getNullability(S.Context)) {
++     if (*nullability == NullabilityKind::NonNull)
++       return false;
++   }
++ 
++   // As a special case, transparent unions initialized with zero are
++   // considered null for the purposes of the nonnull attribute.
++   if (const RecordType *UT = Expr->getType()->getAsUnionType()) {
++     if (UT->getDecl()->hasAttr<TransparentUnionAttr>())
++       if (const CompoundLiteralExpr *CLE =
++           dyn_cast<CompoundLiteralExpr>(Expr))
++         if (const InitListExpr *ILE =
++             dyn_cast<InitListExpr>(CLE->getInitializer()))
++           Expr = ILE->getInit(0);
++   }
++ 
++   bool Result;
++   return (!Expr->isValueDependent() &&
++           Expr->EvaluateAsBooleanCondition(Result, S.Context) &&
++           !Result);
++ }
++ 
++ static void CheckNonNullArgument(Sema &S,
++                                  const Expr *ArgExpr,
++                                  SourceLocation CallSiteLoc) {
++   if (CheckNonNullExpr(S, ArgExpr))
++     S.DiagRuntimeBehavior(CallSiteLoc, ArgExpr,
++                           S.PDiag(diag::warn_null_arg)
++                               << ArgExpr->getSourceRange());
++ }
++ 
++ bool Sema::GetFormatNSStringIdx(const FormatAttr *Format, unsigned &Idx) {
++   FormatStringInfo FSI;
++   if ((GetFormatStringType(Format) == FST_NSString) &&
++       getFormatStringInfo(Format, false, &FSI)) {
++     Idx = FSI.FormatIdx;
++     return true;
++   }
++   return false;
++ }
++ 
++ /// Diagnose use of %s directive in an NSString which is being passed
++ /// as formatting string to formatting method.
++ static void
++ DiagnoseCStringFormatDirectiveInCFAPI(Sema &S,
++                                         const NamedDecl *FDecl,
++                                         Expr **Args,
++                                         unsigned NumArgs) {
++   unsigned Idx = 0;
++   bool Format = false;
++   ObjCStringFormatFamily SFFamily = FDecl->getObjCFStringFormattingFamily();
++   if (SFFamily == ObjCStringFormatFamily::SFF_CFString) {
++     Idx = 2;
++     Format = true;
++   }
++   else
++     for (const auto *I : FDecl->specific_attrs<FormatAttr>()) {
++       if (S.GetFormatNSStringIdx(I, Idx)) {
++         Format = true;
++         break;
++       }
++     }
++   if (!Format || NumArgs <= Idx)
++     return;
++   const Expr *FormatExpr = Args[Idx];
++   if (const CStyleCastExpr *CSCE = dyn_cast<CStyleCastExpr>(FormatExpr))
++     FormatExpr = CSCE->getSubExpr();
++   const StringLiteral *FormatString;
++   if (const ObjCStringLiteral *OSL =
++       dyn_cast<ObjCStringLiteral>(FormatExpr->IgnoreParenImpCasts()))
++     FormatString = OSL->getString();
++   else
++     FormatString = dyn_cast<StringLiteral>(FormatExpr->IgnoreParenImpCasts());
++   if (!FormatString)
++     return;
++   if (S.FormatStringHasSArg(FormatString)) {
++     S.Diag(FormatExpr->getExprLoc(), diag::warn_objc_cdirective_format_string)
++       << "%s" << 1 << 1;
++     S.Diag(FDecl->getLocation(), diag::note_entity_declared_at)
++       << FDecl->getDeclName();
++   }
++ }
++ 
++ /// Determine whether the given type has a non-null nullability annotation.
++ static bool isNonNullType(ASTContext &ctx, QualType type) {
++   if (auto nullability = type->getNullability(ctx))
++     return *nullability == NullabilityKind::NonNull;
++ 
++   return false;
++ }
++ 
++ static void CheckNonNullArguments(Sema &S,
++                                   const NamedDecl *FDecl,
++                                   const FunctionProtoType *Proto,
++                                   ArrayRef<const Expr *> Args,
++                                   SourceLocation CallSiteLoc) {
++   assert((FDecl || Proto) && "Need a function declaration or prototype");
++ 
++   // Already checked by by constant evaluator.
++   if (S.isConstantEvaluated())
++     return;
++   // Check the attributes attached to the method/function itself.
++   llvm::SmallBitVector NonNullArgs;
++   if (FDecl) {
++     // Handle the nonnull attribute on the function/method declaration itself.
++     for (const auto *NonNull : FDecl->specific_attrs<NonNullAttr>()) {
++       if (!NonNull->args_size()) {
++         // Easy case: all pointer arguments are nonnull.
++         for (const auto *Arg : Args)
++           if (S.isValidPointerAttrType(Arg->getType()))
++             CheckNonNullArgument(S, Arg, CallSiteLoc);
++         return;
++       }
++ 
++       for (const ParamIdx &Idx : NonNull->args()) {
++         unsigned IdxAST = Idx.getASTIndex();
++         if (IdxAST >= Args.size())
++           continue;
++         if (NonNullArgs.empty())
++           NonNullArgs.resize(Args.size());
++         NonNullArgs.set(IdxAST);
++       }
++     }
++   }
++ 
++   if (FDecl && (isa<FunctionDecl>(FDecl) || isa<ObjCMethodDecl>(FDecl))) {
++     // Handle the nonnull attribute on the parameters of the
++     // function/method.
++     ArrayRef<ParmVarDecl*> parms;
++     if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(FDecl))
++       parms = FD->parameters();
++     else
++       parms = cast<ObjCMethodDecl>(FDecl)->parameters();
++ 
++     unsigned ParamIndex = 0;
++     for (ArrayRef<ParmVarDecl*>::iterator I = parms.begin(), E = parms.end();
++          I != E; ++I, ++ParamIndex) {
++       const ParmVarDecl *PVD = *I;
++       if (PVD->hasAttr<NonNullAttr>() ||
++           isNonNullType(S.Context, PVD->getType())) {
++         if (NonNullArgs.empty())
++           NonNullArgs.resize(Args.size());
++ 
++         NonNullArgs.set(ParamIndex);
++       }
++     }
++   } else {
++     // If we have a non-function, non-method declaration but no
++     // function prototype, try to dig out the function prototype.
++     if (!Proto) {
++       if (const ValueDecl *VD = dyn_cast<ValueDecl>(FDecl)) {
++         QualType type = VD->getType().getNonReferenceType();
++         if (auto pointerType = type->getAs<PointerType>())
++           type = pointerType->getPointeeType();
++         else if (auto blockType = type->getAs<BlockPointerType>())
++           type = blockType->getPointeeType();
++         // FIXME: data member pointers?
++ 
++         // Dig out the function prototype, if there is one.
++         Proto = type->getAs<FunctionProtoType>();
++       }
++     }
++ 
++     // Fill in non-null argument information from the nullability
++     // information on the parameter types (if we have them).
++     if (Proto) {
++       unsigned Index = 0;
++       for (auto paramType : Proto->getParamTypes()) {
++         if (isNonNullType(S.Context, paramType)) {
++           if (NonNullArgs.empty())
++             NonNullArgs.resize(Args.size());
++ 
++           NonNullArgs.set(Index);
++         }
++ 
++         ++Index;
++       }
++     }
++   }
++ 
++   // Check for non-null arguments.
++   for (unsigned ArgIndex = 0, ArgIndexEnd = NonNullArgs.size();
++        ArgIndex != ArgIndexEnd; ++ArgIndex) {
++     if (NonNullArgs[ArgIndex])
++       CheckNonNullArgument(S, Args[ArgIndex], CallSiteLoc);
++   }
++ }
++ 
++ /// Warn if a pointer or reference argument passed to a function points to an
++ /// object that is less aligned than the parameter. This can happen when
++ /// creating a typedef with a lower alignment than the original type and then
++ /// calling functions defined in terms of the original type.
++ void Sema::CheckArgAlignment(SourceLocation Loc, NamedDecl *FDecl,
++                              StringRef ParamName, QualType ArgTy,
++                              QualType ParamTy) {
++ 
++   // If a function accepts a pointer or reference type
++   if (!ParamTy->isPointerType() && !ParamTy->isReferenceType())
++     return;
++ 
++   // If the parameter is a pointer type, get the pointee type for the
++   // argument too. If the parameter is a reference type, don't try to get
++   // the pointee type for the argument.
++   if (ParamTy->isPointerType())
++     ArgTy = ArgTy->getPointeeType();
++ 
++   // Remove reference or pointer
++   ParamTy = ParamTy->getPointeeType();
++ 
++   // Find expected alignment, and the actual alignment of the passed object.
++   // getTypeAlignInChars requires complete types
++   if (ArgTy.isNull() || ParamTy->isIncompleteType() ||
++       ArgTy->isIncompleteType() || ParamTy->isUndeducedType() ||
++       ArgTy->isUndeducedType())
++     return;
++ 
++   CharUnits ParamAlign = Context.getTypeAlignInChars(ParamTy);
++   CharUnits ArgAlign = Context.getTypeAlignInChars(ArgTy);
++ 
++   // If the argument is less aligned than the parameter, there is a
++   // potential alignment issue.
++   if (ArgAlign < ParamAlign)
++     Diag(Loc, diag::warn_param_mismatched_alignment)
++         << (int)ArgAlign.getQuantity() << (int)ParamAlign.getQuantity()
++         << ParamName << FDecl;
++ }
++ 
++ /// Handles the checks for format strings, non-POD arguments to vararg
++ /// functions, NULL arguments passed to non-NULL parameters, and diagnose_if
++ /// attributes.
++ void Sema::checkCall(NamedDecl *FDecl, const FunctionProtoType *Proto,
++                      const Expr *ThisArg, ArrayRef<const Expr *> Args,
++                      bool IsMemberFunction, SourceLocation Loc,
++                      SourceRange Range, VariadicCallType CallType) {
++   // FIXME: We should check as much as we can in the template definition.
++   if (CurContext->isDependentContext())
++     return;
++ 
++   // Printf and scanf checking.
++   llvm::SmallBitVector CheckedVarArgs;
++   if (FDecl) {
++     for (const auto *I : FDecl->specific_attrs<FormatAttr>()) {
++       // Only create vector if there are format attributes.
++       CheckedVarArgs.resize(Args.size());
++ 
++       CheckFormatArguments(I, Args, IsMemberFunction, CallType, Loc, Range,
++                            CheckedVarArgs);
++     }
++   }
++ 
++   // Refuse POD arguments that weren't caught by the format string
++   // checks above.
++   auto *FD = dyn_cast_or_null<FunctionDecl>(FDecl);
++   if (CallType != VariadicDoesNotApply &&
++       (!FD || FD->getBuiltinID() != Builtin::BI__noop)) {
++     unsigned NumParams = Proto ? Proto->getNumParams()
++                        : FDecl && isa<FunctionDecl>(FDecl)
++                            ? cast<FunctionDecl>(FDecl)->getNumParams()
++                        : FDecl && isa<ObjCMethodDecl>(FDecl)
++                            ? cast<ObjCMethodDecl>(FDecl)->param_size()
++                        : 0;
++ 
++     for (unsigned ArgIdx = NumParams; ArgIdx < Args.size(); ++ArgIdx) {
++       // Args[ArgIdx] can be null in malformed code.
++       if (const Expr *Arg = Args[ArgIdx]) {
++         if (CheckedVarArgs.empty() || !CheckedVarArgs[ArgIdx])
++           checkVariadicArgument(Arg, CallType);
++       }
++     }
++   }
++ 
++   if (FDecl || Proto) {
++     CheckNonNullArguments(*this, FDecl, Proto, Args, Loc);
++ 
++     // Type safety checking.
++     if (FDecl) {
++       for (const auto *I : FDecl->specific_attrs<ArgumentWithTypeTagAttr>())
++         CheckArgumentWithTypeTag(I, Args, Loc);
++     }
++   }
++ 
++   // Check that passed arguments match the alignment of original arguments.
++   // Try to get the missing prototype from the declaration.
++   if (!Proto && FDecl) {
++     const auto *FT = FDecl->getFunctionType();
++     if (isa_and_nonnull<FunctionProtoType>(FT))
++       Proto = cast<FunctionProtoType>(FDecl->getFunctionType());
++   }
++   if (Proto) {
++     // For variadic functions, we may have more args than parameters.
++     // For some K&R functions, we may have less args than parameters.
++     const auto N = std::min<unsigned>(Proto->getNumParams(), Args.size());
++     for (unsigned ArgIdx = 0; ArgIdx < N; ++ArgIdx) {
++       // Args[ArgIdx] can be null in malformed code.
++       if (const Expr *Arg = Args[ArgIdx]) {
++         if (Arg->containsErrors())
++           continue;
++ 
++         QualType ParamTy = Proto->getParamType(ArgIdx);
++         QualType ArgTy = Arg->getType();
++         CheckArgAlignment(Arg->getExprLoc(), FDecl, std::to_string(ArgIdx + 1),
++                           ArgTy, ParamTy);
++       }
++     }
++   }
++ 
++   if (FDecl && FDecl->hasAttr<AllocAlignAttr>()) {
++     auto *AA = FDecl->getAttr<AllocAlignAttr>();
++     const Expr *Arg = Args[AA->getParamIndex().getASTIndex()];
++     if (!Arg->isValueDependent()) {
++       Expr::EvalResult Align;
++       if (Arg->EvaluateAsInt(Align, Context)) {
++         const llvm::APSInt &I = Align.Val.getInt();
++         if (!I.isPowerOf2())
++           Diag(Arg->getExprLoc(), diag::warn_alignment_not_power_of_two)
++               << Arg->getSourceRange();
++ 
++         if (I > Sema::MaximumAlignment)
++           Diag(Arg->getExprLoc(), diag::warn_assume_aligned_too_great)
++               << Arg->getSourceRange() << Sema::MaximumAlignment;
++       }
++     }
++   }
++ 
++   if (FD)
++     diagnoseArgDependentDiagnoseIfAttrs(FD, ThisArg, Args, Loc);
++ }
++ 
++ /// CheckConstructorCall - Check a constructor call for correctness and safety
++ /// properties not enforced by the C type system.
++ void Sema::CheckConstructorCall(FunctionDecl *FDecl, QualType ThisType,
++                                 ArrayRef<const Expr *> Args,
++                                 const FunctionProtoType *Proto,
++                                 SourceLocation Loc) {
++   VariadicCallType CallType =
++       Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply;
++ 
++   auto *Ctor = cast<CXXConstructorDecl>(FDecl);
++   CheckArgAlignment(Loc, FDecl, "'this'", Context.getPointerType(ThisType),
++                     Context.getPointerType(Ctor->getThisObjectType()));
++ 
++   checkCall(FDecl, Proto, /*ThisArg=*/nullptr, Args, /*IsMemberFunction=*/true,
++             Loc, SourceRange(), CallType);
++ }
++ 
++ /// CheckFunctionCall - Check a direct function call for various correctness
++ /// and safety properties not strictly enforced by the C type system.
++ bool Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
++                              const FunctionProtoType *Proto) {
++   bool IsMemberOperatorCall = isa<CXXOperatorCallExpr>(TheCall) &&
++                               isa<CXXMethodDecl>(FDecl);
++   bool IsMemberFunction = isa<CXXMemberCallExpr>(TheCall) ||
++                           IsMemberOperatorCall;
++   VariadicCallType CallType = getVariadicCallType(FDecl, Proto,
++                                                   TheCall->getCallee());
++   Expr** Args = TheCall->getArgs();
++   unsigned NumArgs = TheCall->getNumArgs();
++ 
++   Expr *ImplicitThis = nullptr;
++   if (IsMemberOperatorCall) {
++     // If this is a call to a member operator, hide the first argument
++     // from checkCall.
++     // FIXME: Our choice of AST representation here is less than ideal.
++     ImplicitThis = Args[0];
++     ++Args;
++     --NumArgs;
++   } else if (IsMemberFunction)
++     ImplicitThis =
++         cast<CXXMemberCallExpr>(TheCall)->getImplicitObjectArgument();
++ 
++   if (ImplicitThis) {
++     // ImplicitThis may or may not be a pointer, depending on whether . or -> is
++     // used.
++     QualType ThisType = ImplicitThis->getType();
++     if (!ThisType->isPointerType()) {
++       assert(!ThisType->isReferenceType());
++       ThisType = Context.getPointerType(ThisType);
++     }
++ 
++     QualType ThisTypeFromDecl =
++         Context.getPointerType(cast<CXXMethodDecl>(FDecl)->getThisObjectType());
++ 
++     CheckArgAlignment(TheCall->getRParenLoc(), FDecl, "'this'", ThisType,
++                       ThisTypeFromDecl);
++   }
++ 
++   checkCall(FDecl, Proto, ImplicitThis, llvm::makeArrayRef(Args, NumArgs),
++             IsMemberFunction, TheCall->getRParenLoc(),
++             TheCall->getCallee()->getSourceRange(), CallType);
++ 
++   IdentifierInfo *FnInfo = FDecl->getIdentifier();
++   // None of the checks below are needed for functions that don't have
++   // simple names (e.g., C++ conversion functions).
++   if (!FnInfo)
++     return false;
++ 
++   CheckTCBEnforcement(TheCall, FDecl);
++ 
++   CheckAbsoluteValueFunction(TheCall, FDecl);
++   CheckMaxUnsignedZero(TheCall, FDecl);
++ 
++   if (getLangOpts().ObjC)
++     DiagnoseCStringFormatDirectiveInCFAPI(*this, FDecl, Args, NumArgs);
++ 
++   unsigned CMId = FDecl->getMemoryFunctionKind();
++ 
++   // Handle memory setting and copying functions.
++   switch (CMId) {
++   case 0:
++     return false;
++   case Builtin::BIstrlcpy: // fallthrough
++   case Builtin::BIstrlcat:
++     CheckStrlcpycatArguments(TheCall, FnInfo);
++     break;
++   case Builtin::BIstrncat:
++     CheckStrncatArguments(TheCall, FnInfo);
++     break;
++   case Builtin::BIfree:
++     CheckFreeArguments(TheCall);
++     break;
++   default:
++     CheckMemaccessArguments(TheCall, CMId, FnInfo);
++   }
++ 
++   return false;
++ }
++ 
++ bool Sema::CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation lbrac,
++                                ArrayRef<const Expr *> Args) {
++   VariadicCallType CallType =
++       Method->isVariadic() ? VariadicMethod : VariadicDoesNotApply;
++ 
++   checkCall(Method, nullptr, /*ThisArg=*/nullptr, Args,
++             /*IsMemberFunction=*/false, lbrac, Method->getSourceRange(),
++             CallType);
++ 
++   return false;
++ }
++ 
++ bool Sema::CheckPointerCall(NamedDecl *NDecl, CallExpr *TheCall,
++                             const FunctionProtoType *Proto) {
++   QualType Ty;
++   if (const auto *V = dyn_cast<VarDecl>(NDecl))
++     Ty = V->getType().getNonReferenceType();
++   else if (const auto *F = dyn_cast<FieldDecl>(NDecl))
++     Ty = F->getType().getNonReferenceType();
++   else
++     return false;
++ 
++   if (!Ty->isBlockPointerType() && !Ty->isFunctionPointerType() &&
++       !Ty->isFunctionProtoType())
++     return false;
++ 
++   VariadicCallType CallType;
++   if (!Proto || !Proto->isVariadic()) {
++     CallType = VariadicDoesNotApply;
++   } else if (Ty->isBlockPointerType()) {
++     CallType = VariadicBlock;
++   } else { // Ty->isFunctionPointerType()
++     CallType = VariadicFunction;
++   }
++ 
++   checkCall(NDecl, Proto, /*ThisArg=*/nullptr,
++             llvm::makeArrayRef(TheCall->getArgs(), TheCall->getNumArgs()),
++             /*IsMemberFunction=*/false, TheCall->getRParenLoc(),
++             TheCall->getCallee()->getSourceRange(), CallType);
++ 
++   return false;
++ }
++ 
++ /// Checks function calls when a FunctionDecl or a NamedDecl is not available,
++ /// such as function pointers returned from functions.
++ bool Sema::CheckOtherCall(CallExpr *TheCall, const FunctionProtoType *Proto) {
++   VariadicCallType CallType = getVariadicCallType(/*FDecl=*/nullptr, Proto,
++                                                   TheCall->getCallee());
++   checkCall(/*FDecl=*/nullptr, Proto, /*ThisArg=*/nullptr,
++             llvm::makeArrayRef(TheCall->getArgs(), TheCall->getNumArgs()),
++             /*IsMemberFunction=*/false, TheCall->getRParenLoc(),
++             TheCall->getCallee()->getSourceRange(), CallType);
++ 
++   return false;
++ }
++ 
++ static bool isValidOrderingForOp(int64_t Ordering, AtomicExpr::AtomicOp Op) {
++   if (!llvm::isValidAtomicOrderingCABI(Ordering))
++     return false;
++ 
++   auto OrderingCABI = (llvm::AtomicOrderingCABI)Ordering;
++   switch (Op) {
++   case AtomicExpr::AO__c11_atomic_init:
++   case AtomicExpr::AO__opencl_atomic_init:
++     llvm_unreachable("There is no ordering argument for an init");
++ 
++   case AtomicExpr::AO__c11_atomic_load:
++   case AtomicExpr::AO__opencl_atomic_load:
++   case AtomicExpr::AO__atomic_load_n:
++   case AtomicExpr::AO__atomic_load:
++     return OrderingCABI != llvm::AtomicOrderingCABI::release &&
++            OrderingCABI != llvm::AtomicOrderingCABI::acq_rel;
++ 
++   case AtomicExpr::AO__c11_atomic_store:
++   case AtomicExpr::AO__opencl_atomic_store:
++   case AtomicExpr::AO__atomic_store:
++   case AtomicExpr::AO__atomic_store_n:
++     return OrderingCABI != llvm::AtomicOrderingCABI::consume &&
++            OrderingCABI != llvm::AtomicOrderingCABI::acquire &&
++            OrderingCABI != llvm::AtomicOrderingCABI::acq_rel;
++ 
++   default:
++     return true;
++   }
++ }
++ 
++ ExprResult Sema::SemaAtomicOpsOverloaded(ExprResult TheCallResult,
++                                          AtomicExpr::AtomicOp Op) {
++   CallExpr *TheCall = cast<CallExpr>(TheCallResult.get());
++   DeclRefExpr *DRE =cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
++   MultiExprArg Args{TheCall->getArgs(), TheCall->getNumArgs()};
++   return BuildAtomicExpr({TheCall->getBeginLoc(), TheCall->getEndLoc()},
++                          DRE->getSourceRange(), TheCall->getRParenLoc(), Args,
++                          Op);
++ }
++ 
++ ExprResult Sema::BuildAtomicExpr(SourceRange CallRange, SourceRange ExprRange,
++                                  SourceLocation RParenLoc, MultiExprArg Args,
++                                  AtomicExpr::AtomicOp Op,
++                                  AtomicArgumentOrder ArgOrder) {
++   // All the non-OpenCL operations take one of the following forms.
++   // The OpenCL operations take the __c11 forms with one extra argument for
++   // synchronization scope.
++   enum {
++     // C    __c11_atomic_init(A *, C)
++     Init,
++ 
++     // C    __c11_atomic_load(A *, int)
++     Load,
++ 
++     // void __atomic_load(A *, CP, int)
++     LoadCopy,
++ 
++     // void __atomic_store(A *, CP, int)
++     Copy,
++ 
++     // C    __c11_atomic_add(A *, M, int)
++     Arithmetic,
++ 
++     // C    __atomic_exchange_n(A *, CP, int)
++     Xchg,
++ 
++     // void __atomic_exchange(A *, C *, CP, int)
++     GNUXchg,
++ 
++     // bool __c11_atomic_compare_exchange_strong(A *, C *, CP, int, int)
++     C11CmpXchg,
++ 
++     // bool __atomic_compare_exchange(A *, C *, CP, bool, int, int)
++     GNUCmpXchg
++   } Form = Init;
++ 
++   const unsigned NumForm = GNUCmpXchg + 1;
++   const unsigned NumArgs[] = { 2, 2, 3, 3, 3, 3, 4, 5, 6 };
++   const unsigned NumVals[] = { 1, 0, 1, 1, 1, 1, 2, 2, 3 };
++   // where:
++   //   C is an appropriate type,
++   //   A is volatile _Atomic(C) for __c11 builtins and is C for GNU builtins,
++   //   CP is C for __c11 builtins and GNU _n builtins and is C * otherwise,
++   //   M is C if C is an integer, and ptrdiff_t if C is a pointer, and
++   //   the int parameters are for orderings.
++ 
++   static_assert(sizeof(NumArgs)/sizeof(NumArgs[0]) == NumForm
++       && sizeof(NumVals)/sizeof(NumVals[0]) == NumForm,
++       "need to update code for modified forms");
++   static_assert(AtomicExpr::AO__c11_atomic_init == 0 &&
++                     AtomicExpr::AO__c11_atomic_fetch_min + 1 ==
++                         AtomicExpr::AO__atomic_load,
++                 "need to update code for modified C11 atomics");
++   bool IsOpenCL = Op >= AtomicExpr::AO__opencl_atomic_init &&
++                   Op <= AtomicExpr::AO__opencl_atomic_fetch_max;
++   bool IsC11 = (Op >= AtomicExpr::AO__c11_atomic_init &&
++                Op <= AtomicExpr::AO__c11_atomic_fetch_min) ||
++                IsOpenCL;
++   bool IsN = Op == AtomicExpr::AO__atomic_load_n ||
++              Op == AtomicExpr::AO__atomic_store_n ||
++              Op == AtomicExpr::AO__atomic_exchange_n ||
++              Op == AtomicExpr::AO__atomic_compare_exchange_n;
++   bool IsAddSub = false;
++ 
++   switch (Op) {
++   case AtomicExpr::AO__c11_atomic_init:
++   case AtomicExpr::AO__opencl_atomic_init:
++     Form = Init;
++     break;
++ 
++   case AtomicExpr::AO__c11_atomic_load:
++   case AtomicExpr::AO__opencl_atomic_load:
++   case AtomicExpr::AO__atomic_load_n:
++     Form = Load;
++     break;
++ 
++   case AtomicExpr::AO__atomic_load:
++     Form = LoadCopy;
++     break;
++ 
++   case AtomicExpr::AO__c11_atomic_store:
++   case AtomicExpr::AO__opencl_atomic_store:
++   case AtomicExpr::AO__atomic_store:
++   case AtomicExpr::AO__atomic_store_n:
++     Form = Copy;
++     break;
++ 
++   case AtomicExpr::AO__c11_atomic_fetch_add:
++   case AtomicExpr::AO__c11_atomic_fetch_sub:
++   case AtomicExpr::AO__opencl_atomic_fetch_add:
++   case AtomicExpr::AO__opencl_atomic_fetch_sub:
++   case AtomicExpr::AO__atomic_fetch_add:
++   case AtomicExpr::AO__atomic_fetch_sub:
++   case AtomicExpr::AO__atomic_add_fetch:
++   case AtomicExpr::AO__atomic_sub_fetch:
++     IsAddSub = true;
++     Form = Arithmetic;
++     break;
++   case AtomicExpr::AO__c11_atomic_fetch_and:
++   case AtomicExpr::AO__c11_atomic_fetch_or:
++   case AtomicExpr::AO__c11_atomic_fetch_xor:
++   case AtomicExpr::AO__opencl_atomic_fetch_and:
++   case AtomicExpr::AO__opencl_atomic_fetch_or:
++   case AtomicExpr::AO__opencl_atomic_fetch_xor:
++   case AtomicExpr::AO__atomic_fetch_and:
++   case AtomicExpr::AO__atomic_fetch_or:
++   case AtomicExpr::AO__atomic_fetch_xor:
++   case AtomicExpr::AO__atomic_fetch_nand:
++   case AtomicExpr::AO__atomic_and_fetch:
++   case AtomicExpr::AO__atomic_or_fetch:
++   case AtomicExpr::AO__atomic_xor_fetch:
++   case AtomicExpr::AO__atomic_nand_fetch:
++     Form = Arithmetic;
++     break;
++   case AtomicExpr::AO__c11_atomic_fetch_min:
++   case AtomicExpr::AO__c11_atomic_fetch_max:
++   case AtomicExpr::AO__opencl_atomic_fetch_min:
++   case AtomicExpr::AO__opencl_atomic_fetch_max:
++   case AtomicExpr::AO__atomic_min_fetch:
++   case AtomicExpr::AO__atomic_max_fetch:
++   case AtomicExpr::AO__atomic_fetch_min:
++   case AtomicExpr::AO__atomic_fetch_max:
++     Form = Arithmetic;
++     break;
++ 
++   case AtomicExpr::AO__c11_atomic_exchange:
++   case AtomicExpr::AO__opencl_atomic_exchange:
++   case AtomicExpr::AO__atomic_exchange_n:
++     Form = Xchg;
++     break;
++ 
++   case AtomicExpr::AO__atomic_exchange:
++     Form = GNUXchg;
++     break;
++ 
++   case AtomicExpr::AO__c11_atomic_compare_exchange_strong:
++   case AtomicExpr::AO__c11_atomic_compare_exchange_weak:
++   case AtomicExpr::AO__opencl_atomic_compare_exchange_strong:
++   case AtomicExpr::AO__opencl_atomic_compare_exchange_weak:
++     Form = C11CmpXchg;
++     break;
++ 
++   case AtomicExpr::AO__atomic_compare_exchange:
++   case AtomicExpr::AO__atomic_compare_exchange_n:
++     Form = GNUCmpXchg;
++     break;
++   }
++ 
++   unsigned AdjustedNumArgs = NumArgs[Form];
++   if (IsOpenCL && Op != AtomicExpr::AO__opencl_atomic_init)
++     ++AdjustedNumArgs;
++   // Check we have the right number of arguments.
++   if (Args.size() < AdjustedNumArgs) {
++     Diag(CallRange.getEnd(), diag::err_typecheck_call_too_few_args)
++         << 0 << AdjustedNumArgs << static_cast<unsigned>(Args.size())
++         << ExprRange;
++     return ExprError();
++   } else if (Args.size() > AdjustedNumArgs) {
++     Diag(Args[AdjustedNumArgs]->getBeginLoc(),
++          diag::err_typecheck_call_too_many_args)
++         << 0 << AdjustedNumArgs << static_cast<unsigned>(Args.size())
++         << ExprRange;
++     return ExprError();
++   }
++ 
++   // Inspect the first argument of the atomic operation.
++   Expr *Ptr = Args[0];
++   ExprResult ConvertedPtr = DefaultFunctionArrayLvalueConversion(Ptr);
++   if (ConvertedPtr.isInvalid())
++     return ExprError();
++ 
++   Ptr = ConvertedPtr.get();
++   const PointerType *pointerType = Ptr->getType()->getAs<PointerType>();
++   if (!pointerType) {
++     Diag(ExprRange.getBegin(), diag::err_atomic_builtin_must_be_pointer)
++         << Ptr->getType() << Ptr->getSourceRange();
++     return ExprError();
++   }
++ 
++   // For a __c11 builtin, this should be a pointer to an _Atomic type.
++   QualType AtomTy = pointerType->getPointeeType(); // 'A'
++   QualType ValType = AtomTy; // 'C'
++   if (IsC11) {
++     if (!AtomTy->isAtomicType()) {
++       Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_atomic)
++           << Ptr->getType() << Ptr->getSourceRange();
++       return ExprError();
++     }
++     if ((Form != Load && Form != LoadCopy && AtomTy.isConstQualified()) ||
++         AtomTy.getAddressSpace() == LangAS::opencl_constant) {
++       Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_non_const_atomic)
++           << (AtomTy.isConstQualified() ? 0 : 1) << Ptr->getType()
++           << Ptr->getSourceRange();
++       return ExprError();
++     }
++     ValType = AtomTy->castAs<AtomicType>()->getValueType();
++   } else if (Form != Load && Form != LoadCopy) {
++     if (ValType.isConstQualified()) {
++       Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_non_const_pointer)
++           << Ptr->getType() << Ptr->getSourceRange();
++       return ExprError();
++     }
++   }
++ 
++   // For an arithmetic operation, the implied arithmetic must be well-formed.
++   if (Form == Arithmetic) {
++     // gcc does not enforce these rules for GNU atomics, but we do so for
++     // sanity.
++     auto IsAllowedValueType = [&](QualType ValType) {
++       if (ValType->isIntegerType())
++         return true;
++       if (ValType->isPointerType())
++         return true;
++       if (!ValType->isFloatingType())
++         return false;
++       // LLVM Parser does not allow atomicrmw with x86_fp80 type.
++       if (ValType->isSpecificBuiltinType(BuiltinType::LongDouble) &&
++           &Context.getTargetInfo().getLongDoubleFormat() ==
++               &llvm::APFloat::x87DoubleExtended())
++         return false;
++       return true;
++     };
++     if (IsAddSub && !IsAllowedValueType(ValType)) {
++       Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_atomic_int_ptr_or_fp)
++           << IsC11 << Ptr->getType() << Ptr->getSourceRange();
++       return ExprError();
++     }
++     if (!IsAddSub && !ValType->isIntegerType()) {
++       Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_atomic_int)
++           << IsC11 << Ptr->getType() << Ptr->getSourceRange();
++       return ExprError();
++     }
++     if (IsC11 && ValType->isPointerType() &&
++         RequireCompleteType(Ptr->getBeginLoc(), ValType->getPointeeType(),
++                             diag::err_incomplete_type)) {
++       return ExprError();
++     }
++   } else if (IsN && !ValType->isIntegerType() && !ValType->isPointerType()) {
++     // For __atomic_*_n operations, the value type must be a scalar integral or
++     // pointer type which is 1, 2, 4, 8 or 16 bytes in length.
++     Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_atomic_int_or_ptr)
++         << IsC11 << Ptr->getType() << Ptr->getSourceRange();
++     return ExprError();
++   }
++ 
++   if (!IsC11 && !AtomTy.isTriviallyCopyableType(Context) &&
++       !AtomTy->isScalarType()) {
++     // For GNU atomics, require a trivially-copyable type. This is not part of
++     // the GNU atomics specification, but we enforce it for sanity.
++     Diag(ExprRange.getBegin(), diag::err_atomic_op_needs_trivial_copy)
++         << Ptr->getType() << Ptr->getSourceRange();
++     return ExprError();
++   }
++ 
++   switch (ValType.getObjCLifetime()) {
++   case Qualifiers::OCL_None:
++   case Qualifiers::OCL_ExplicitNone:
++     // okay
++     break;
++ 
++   case Qualifiers::OCL_Weak:
++   case Qualifiers::OCL_Strong:
++   case Qualifiers::OCL_Autoreleasing:
++     // FIXME: Can this happen? By this point, ValType should be known
++     // to be trivially copyable.
++     Diag(ExprRange.getBegin(), diag::err_arc_atomic_ownership)
++         << ValType << Ptr->getSourceRange();
++     return ExprError();
++   }
++ 
++   // All atomic operations have an overload which takes a pointer to a volatile
++   // 'A'.  We shouldn't let the volatile-ness of the pointee-type inject itself
++   // into the result or the other operands. Similarly atomic_load takes a
++   // pointer to a const 'A'.
++   ValType.removeLocalVolatile();
++   ValType.removeLocalConst();
++   QualType ResultType = ValType;
++   if (Form == Copy || Form == LoadCopy || Form == GNUXchg ||
++       Form == Init)
++     ResultType = Context.VoidTy;
++   else if (Form == C11CmpXchg || Form == GNUCmpXchg)
++     ResultType = Context.BoolTy;
++ 
++   // The type of a parameter passed 'by value'. In the GNU atomics, such
++   // arguments are actually passed as pointers.
++   QualType ByValType = ValType; // 'CP'
++   bool IsPassedByAddress = false;
++   if (!IsC11 && !IsN) {
++     ByValType = Ptr->getType();
++     IsPassedByAddress = true;
++   }
++ 
++   SmallVector<Expr *, 5> APIOrderedArgs;
++   if (ArgOrder == Sema::AtomicArgumentOrder::AST) {
++     APIOrderedArgs.push_back(Args[0]);
++     switch (Form) {
++     case Init:
++     case Load:
++       APIOrderedArgs.push_back(Args[1]); // Val1/Order
++       break;
++     case LoadCopy:
++     case Copy:
++     case Arithmetic:
++     case Xchg:
++       APIOrderedArgs.push_back(Args[2]); // Val1
++       APIOrderedArgs.push_back(Args[1]); // Order
++       break;
++     case GNUXchg:
++       APIOrderedArgs.push_back(Args[2]); // Val1
++       APIOrderedArgs.push_back(Args[3]); // Val2
++       APIOrderedArgs.push_back(Args[1]); // Order
++       break;
++     case C11CmpXchg:
++       APIOrderedArgs.push_back(Args[2]); // Val1
++       APIOrderedArgs.push_back(Args[4]); // Val2
++       APIOrderedArgs.push_back(Args[1]); // Order
++       APIOrderedArgs.push_back(Args[3]); // OrderFail
++       break;
++     case GNUCmpXchg:
++       APIOrderedArgs.push_back(Args[2]); // Val1
++       APIOrderedArgs.push_back(Args[4]); // Val2
++       APIOrderedArgs.push_back(Args[5]); // Weak
++       APIOrderedArgs.push_back(Args[1]); // Order
++       APIOrderedArgs.push_back(Args[3]); // OrderFail
++       break;
++     }
++   } else
++     APIOrderedArgs.append(Args.begin(), Args.end());
++ 
++   // The first argument's non-CV pointer type is used to deduce the type of
++   // subsequent arguments, except for:
++   //  - weak flag (always converted to bool)
++   //  - memory order (always converted to int)
++   //  - scope  (always converted to int)
++   for (unsigned i = 0; i != APIOrderedArgs.size(); ++i) {
++     QualType Ty;
++     if (i < NumVals[Form] + 1) {
++       switch (i) {
++       case 0:
++         // The first argument is always a pointer. It has a fixed type.
++         // It is always dereferenced, a nullptr is undefined.
++         CheckNonNullArgument(*this, APIOrderedArgs[i], ExprRange.getBegin());
++         // Nothing else to do: we already know all we want about this pointer.
++         continue;
++       case 1:
++         // The second argument is the non-atomic operand. For arithmetic, this
++         // is always passed by value, and for a compare_exchange it is always
++         // passed by address. For the rest, GNU uses by-address and C11 uses
++         // by-value.
++         assert(Form != Load);
++         if (Form == Arithmetic && ValType->isPointerType())
++           Ty = Context.getPointerDiffType();
++         else if (Form == Init || Form == Arithmetic)
++           Ty = ValType;
++         else if (Form == Copy || Form == Xchg) {
++           if (IsPassedByAddress) {
++             // The value pointer is always dereferenced, a nullptr is undefined.
++             CheckNonNullArgument(*this, APIOrderedArgs[i],
++                                  ExprRange.getBegin());
++           }
++           Ty = ByValType;
++         } else {
++           Expr *ValArg = APIOrderedArgs[i];
++           // The value pointer is always dereferenced, a nullptr is undefined.
++           CheckNonNullArgument(*this, ValArg, ExprRange.getBegin());
++           LangAS AS = LangAS::Default;
++           // Keep address space of non-atomic pointer type.
++           if (const PointerType *PtrTy =
++                   ValArg->getType()->getAs<PointerType>()) {
++             AS = PtrTy->getPointeeType().getAddressSpace();
++           }
++           Ty = Context.getPointerType(
++               Context.getAddrSpaceQualType(ValType.getUnqualifiedType(), AS));
++         }
++         break;
++       case 2:
++         // The third argument to compare_exchange / GNU exchange is the desired
++         // value, either by-value (for the C11 and *_n variant) or as a pointer.
++         if (IsPassedByAddress)
++           CheckNonNullArgument(*this, APIOrderedArgs[i], ExprRange.getBegin());
++         Ty = ByValType;
++         break;
++       case 3:
++         // The fourth argument to GNU compare_exchange is a 'weak' flag.
++         Ty = Context.BoolTy;
++         break;
++       }
++     } else {
++       // The order(s) and scope are always converted to int.
++       Ty = Context.IntTy;
++     }
++ 
++     InitializedEntity Entity =
++         InitializedEntity::InitializeParameter(Context, Ty, false);
++     ExprResult Arg = APIOrderedArgs[i];
++     Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
++     if (Arg.isInvalid())
++       return true;
++     APIOrderedArgs[i] = Arg.get();
++   }
++ 
++   // Permute the arguments into a 'consistent' order.
++   SmallVector<Expr*, 5> SubExprs;
++   SubExprs.push_back(Ptr);
++   switch (Form) {
++   case Init:
++     // Note, AtomicExpr::getVal1() has a special case for this atomic.
++     SubExprs.push_back(APIOrderedArgs[1]); // Val1
++     break;
++   case Load:
++     SubExprs.push_back(APIOrderedArgs[1]); // Order
++     break;
++   case LoadCopy:
++   case Copy:
++   case Arithmetic:
++   case Xchg:
++     SubExprs.push_back(APIOrderedArgs[2]); // Order
++     SubExprs.push_back(APIOrderedArgs[1]); // Val1
++     break;
++   case GNUXchg:
++     // Note, AtomicExpr::getVal2() has a special case for this atomic.
++     SubExprs.push_back(APIOrderedArgs[3]); // Order
++     SubExprs.push_back(APIOrderedArgs[1]); // Val1
++     SubExprs.push_back(APIOrderedArgs[2]); // Val2
++     break;
++   case C11CmpXchg:
++     SubExprs.push_back(APIOrderedArgs[3]); // Order
++     SubExprs.push_back(APIOrderedArgs[1]); // Val1
++     SubExprs.push_back(APIOrderedArgs[4]); // OrderFail
++     SubExprs.push_back(APIOrderedArgs[2]); // Val2
++     break;
++   case GNUCmpXchg:
++     SubExprs.push_back(APIOrderedArgs[4]); // Order
++     SubExprs.push_back(APIOrderedArgs[1]); // Val1
++     SubExprs.push_back(APIOrderedArgs[5]); // OrderFail
++     SubExprs.push_back(APIOrderedArgs[2]); // Val2
++     SubExprs.push_back(APIOrderedArgs[3]); // Weak
++     break;
++   }
++ 
++   if (SubExprs.size() >= 2 && Form != Init) {
++     if (Optional<llvm::APSInt> Result =
++             SubExprs[1]->getIntegerConstantExpr(Context))
++       if (!isValidOrderingForOp(Result->getSExtValue(), Op))
++         Diag(SubExprs[1]->getBeginLoc(),
++              diag::warn_atomic_op_has_invalid_memory_order)
++             << SubExprs[1]->getSourceRange();
++   }
++ 
++   if (auto ScopeModel = AtomicExpr::getScopeModel(Op)) {
++     auto *Scope = Args[Args.size() - 1];
++     if (Optional<llvm::APSInt> Result =
++             Scope->getIntegerConstantExpr(Context)) {
++       if (!ScopeModel->isValid(Result->getZExtValue()))
++         Diag(Scope->getBeginLoc(), diag::err_atomic_op_has_invalid_synch_scope)
++             << Scope->getSourceRange();
++     }
++     SubExprs.push_back(Scope);
++   }
++ 
++   AtomicExpr *AE = new (Context)
++       AtomicExpr(ExprRange.getBegin(), SubExprs, ResultType, Op, RParenLoc);
++ 
++   if ((Op == AtomicExpr::AO__c11_atomic_load ||
++        Op == AtomicExpr::AO__c11_atomic_store ||
++        Op == AtomicExpr::AO__opencl_atomic_load ||
++        Op == AtomicExpr::AO__opencl_atomic_store ) &&
++       Context.AtomicUsesUnsupportedLibcall(AE))
++     Diag(AE->getBeginLoc(), diag::err_atomic_load_store_uses_lib)
++         << ((Op == AtomicExpr::AO__c11_atomic_load ||
++              Op == AtomicExpr::AO__opencl_atomic_load)
++                 ? 0
++                 : 1);
++ 
++   if (ValType->isExtIntType()) {
++     Diag(Ptr->getExprLoc(), diag::err_atomic_builtin_ext_int_prohibit);
++     return ExprError();
++   }
++ 
++   return AE;
++ }
++ 
++ /// checkBuiltinArgument - Given a call to a builtin function, perform
++ /// normal type-checking on the given argument, updating the call in
++ /// place.  This is useful when a builtin function requires custom
++ /// type-checking for some of its arguments but not necessarily all of
++ /// them.
++ ///
++ /// Returns true on error.
++ static bool checkBuiltinArgument(Sema &S, CallExpr *E, unsigned ArgIndex) {
++   FunctionDecl *Fn = E->getDirectCallee();
++   assert(Fn && "builtin call without direct callee!");
++ 
++   ParmVarDecl *Param = Fn->getParamDecl(ArgIndex);
++   InitializedEntity Entity =
++     InitializedEntity::InitializeParameter(S.Context, Param);
++ 
++   ExprResult Arg = E->getArg(0);
++   Arg = S.PerformCopyInitialization(Entity, SourceLocation(), Arg);
++   if (Arg.isInvalid())
++     return true;
++ 
++   E->setArg(ArgIndex, Arg.get());
++   return false;
++ }
++ 
++ /// We have a call to a function like __sync_fetch_and_add, which is an
++ /// overloaded function based on the pointer type of its first argument.
++ /// The main BuildCallExpr routines have already promoted the types of
++ /// arguments because all of these calls are prototyped as void(...).
++ ///
++ /// This function goes through and does final semantic checking for these
++ /// builtins, as well as generating any warnings.
++ ExprResult
++ Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
++   CallExpr *TheCall = static_cast<CallExpr *>(TheCallResult.get());
++   Expr *Callee = TheCall->getCallee();
++   DeclRefExpr *DRE = cast<DeclRefExpr>(Callee->IgnoreParenCasts());
++   FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
++ 
++   // Ensure that we have at least one argument to do type inference from.
++   if (TheCall->getNumArgs() < 1) {
++     Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
++         << 0 << 1 << TheCall->getNumArgs() << Callee->getSourceRange();
++     return ExprError();
++   }
++ 
++   // Inspect the first argument of the atomic builtin.  This should always be
++   // a pointer type, whose element is an integral scalar or pointer type.
++   // Because it is a pointer type, we don't have to worry about any implicit
++   // casts here.
++   // FIXME: We don't allow floating point scalars as input.
++   Expr *FirstArg = TheCall->getArg(0);
++   ExprResult FirstArgResult = DefaultFunctionArrayLvalueConversion(FirstArg);
++   if (FirstArgResult.isInvalid())
++     return ExprError();
++   FirstArg = FirstArgResult.get();
++   TheCall->setArg(0, FirstArg);
++ 
++   const PointerType *pointerType = FirstArg->getType()->getAs<PointerType>();
++   if (!pointerType) {
++     Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer)
++         << FirstArg->getType() << FirstArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   QualType ValType = pointerType->getPointeeType();
++   if (!ValType->isIntegerType() && !ValType->isAnyPointerType() &&
++       !ValType->isBlockPointerType()) {
++     Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_must_be_pointer_intptr)
++         << FirstArg->getType() << FirstArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   if (ValType.isConstQualified()) {
++     Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_cannot_be_const)
++         << FirstArg->getType() << FirstArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   switch (ValType.getObjCLifetime()) {
++   case Qualifiers::OCL_None:
++   case Qualifiers::OCL_ExplicitNone:
++     // okay
++     break;
++ 
++   case Qualifiers::OCL_Weak:
++   case Qualifiers::OCL_Strong:
++   case Qualifiers::OCL_Autoreleasing:
++     Diag(DRE->getBeginLoc(), diag::err_arc_atomic_ownership)
++         << ValType << FirstArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   // Strip any qualifiers off ValType.
++   ValType = ValType.getUnqualifiedType();
++ 
++   // The majority of builtins return a value, but a few have special return
++   // types, so allow them to override appropriately below.
++   QualType ResultType = ValType;
++ 
++   // We need to figure out which concrete builtin this maps onto.  For example,
++   // __sync_fetch_and_add with a 2 byte object turns into
++   // __sync_fetch_and_add_2.
++ #define BUILTIN_ROW(x) \
++   { Builtin::BI##x##_1, Builtin::BI##x##_2, Builtin::BI##x##_4, \
++     Builtin::BI##x##_8, Builtin::BI##x##_16 }
++ 
++   static const unsigned BuiltinIndices[][5] = {
++     BUILTIN_ROW(__sync_fetch_and_add),
++     BUILTIN_ROW(__sync_fetch_and_sub),
++     BUILTIN_ROW(__sync_fetch_and_or),
++     BUILTIN_ROW(__sync_fetch_and_and),
++     BUILTIN_ROW(__sync_fetch_and_xor),
++     BUILTIN_ROW(__sync_fetch_and_nand),
++ 
++     BUILTIN_ROW(__sync_add_and_fetch),
++     BUILTIN_ROW(__sync_sub_and_fetch),
++     BUILTIN_ROW(__sync_and_and_fetch),
++     BUILTIN_ROW(__sync_or_and_fetch),
++     BUILTIN_ROW(__sync_xor_and_fetch),
++     BUILTIN_ROW(__sync_nand_and_fetch),
++ 
++     BUILTIN_ROW(__sync_val_compare_and_swap),
++     BUILTIN_ROW(__sync_bool_compare_and_swap),
++     BUILTIN_ROW(__sync_lock_test_and_set),
++     BUILTIN_ROW(__sync_lock_release),
++     BUILTIN_ROW(__sync_swap)
++   };
++ #undef BUILTIN_ROW
++ 
++   // Determine the index of the size.
++   unsigned SizeIndex;
++   switch (Context.getTypeSizeInChars(ValType).getQuantity()) {
++   case 1: SizeIndex = 0; break;
++   case 2: SizeIndex = 1; break;
++   case 4: SizeIndex = 2; break;
++   case 8: SizeIndex = 3; break;
++   case 16: SizeIndex = 4; break;
++   default:
++     Diag(DRE->getBeginLoc(), diag::err_atomic_builtin_pointer_size)
++         << FirstArg->getType() << FirstArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   // Each of these builtins has one pointer argument, followed by some number of
++   // values (0, 1 or 2) followed by a potentially empty varags list of stuff
++   // that we ignore.  Find out which row of BuiltinIndices to read from as well
++   // as the number of fixed args.
++   unsigned BuiltinID = FDecl->getBuiltinID();
++   unsigned BuiltinIndex, NumFixed = 1;
++   bool WarnAboutSemanticsChange = false;
++   switch (BuiltinID) {
++   default: llvm_unreachable("Unknown overloaded atomic builtin!");
++   case Builtin::BI__sync_fetch_and_add:
++   case Builtin::BI__sync_fetch_and_add_1:
++   case Builtin::BI__sync_fetch_and_add_2:
++   case Builtin::BI__sync_fetch_and_add_4:
++   case Builtin::BI__sync_fetch_and_add_8:
++   case Builtin::BI__sync_fetch_and_add_16:
++     BuiltinIndex = 0;
++     break;
++ 
++   case Builtin::BI__sync_fetch_and_sub:
++   case Builtin::BI__sync_fetch_and_sub_1:
++   case Builtin::BI__sync_fetch_and_sub_2:
++   case Builtin::BI__sync_fetch_and_sub_4:
++   case Builtin::BI__sync_fetch_and_sub_8:
++   case Builtin::BI__sync_fetch_and_sub_16:
++     BuiltinIndex = 1;
++     break;
++ 
++   case Builtin::BI__sync_fetch_and_or:
++   case Builtin::BI__sync_fetch_and_or_1:
++   case Builtin::BI__sync_fetch_and_or_2:
++   case Builtin::BI__sync_fetch_and_or_4:
++   case Builtin::BI__sync_fetch_and_or_8:
++   case Builtin::BI__sync_fetch_and_or_16:
++     BuiltinIndex = 2;
++     break;
++ 
++   case Builtin::BI__sync_fetch_and_and:
++   case Builtin::BI__sync_fetch_and_and_1:
++   case Builtin::BI__sync_fetch_and_and_2:
++   case Builtin::BI__sync_fetch_and_and_4:
++   case Builtin::BI__sync_fetch_and_and_8:
++   case Builtin::BI__sync_fetch_and_and_16:
++     BuiltinIndex = 3;
++     break;
++ 
++   case Builtin::BI__sync_fetch_and_xor:
++   case Builtin::BI__sync_fetch_and_xor_1:
++   case Builtin::BI__sync_fetch_and_xor_2:
++   case Builtin::BI__sync_fetch_and_xor_4:
++   case Builtin::BI__sync_fetch_and_xor_8:
++   case Builtin::BI__sync_fetch_and_xor_16:
++     BuiltinIndex = 4;
++     break;
++ 
++   case Builtin::BI__sync_fetch_and_nand:
++   case Builtin::BI__sync_fetch_and_nand_1:
++   case Builtin::BI__sync_fetch_and_nand_2:
++   case Builtin::BI__sync_fetch_and_nand_4:
++   case Builtin::BI__sync_fetch_and_nand_8:
++   case Builtin::BI__sync_fetch_and_nand_16:
++     BuiltinIndex = 5;
++     WarnAboutSemanticsChange = true;
++     break;
++ 
++   case Builtin::BI__sync_add_and_fetch:
++   case Builtin::BI__sync_add_and_fetch_1:
++   case Builtin::BI__sync_add_and_fetch_2:
++   case Builtin::BI__sync_add_and_fetch_4:
++   case Builtin::BI__sync_add_and_fetch_8:
++   case Builtin::BI__sync_add_and_fetch_16:
++     BuiltinIndex = 6;
++     break;
++ 
++   case Builtin::BI__sync_sub_and_fetch:
++   case Builtin::BI__sync_sub_and_fetch_1:
++   case Builtin::BI__sync_sub_and_fetch_2:
++   case Builtin::BI__sync_sub_and_fetch_4:
++   case Builtin::BI__sync_sub_and_fetch_8:
++   case Builtin::BI__sync_sub_and_fetch_16:
++     BuiltinIndex = 7;
++     break;
++ 
++   case Builtin::BI__sync_and_and_fetch:
++   case Builtin::BI__sync_and_and_fetch_1:
++   case Builtin::BI__sync_and_and_fetch_2:
++   case Builtin::BI__sync_and_and_fetch_4:
++   case Builtin::BI__sync_and_and_fetch_8:
++   case Builtin::BI__sync_and_and_fetch_16:
++     BuiltinIndex = 8;
++     break;
++ 
++   case Builtin::BI__sync_or_and_fetch:
++   case Builtin::BI__sync_or_and_fetch_1:
++   case Builtin::BI__sync_or_and_fetch_2:
++   case Builtin::BI__sync_or_and_fetch_4:
++   case Builtin::BI__sync_or_and_fetch_8:
++   case Builtin::BI__sync_or_and_fetch_16:
++     BuiltinIndex = 9;
++     break;
++ 
++   case Builtin::BI__sync_xor_and_fetch:
++   case Builtin::BI__sync_xor_and_fetch_1:
++   case Builtin::BI__sync_xor_and_fetch_2:
++   case Builtin::BI__sync_xor_and_fetch_4:
++   case Builtin::BI__sync_xor_and_fetch_8:
++   case Builtin::BI__sync_xor_and_fetch_16:
++     BuiltinIndex = 10;
++     break;
++ 
++   case Builtin::BI__sync_nand_and_fetch:
++   case Builtin::BI__sync_nand_and_fetch_1:
++   case Builtin::BI__sync_nand_and_fetch_2:
++   case Builtin::BI__sync_nand_and_fetch_4:
++   case Builtin::BI__sync_nand_and_fetch_8:
++   case Builtin::BI__sync_nand_and_fetch_16:
++     BuiltinIndex = 11;
++     WarnAboutSemanticsChange = true;
++     break;
++ 
++   case Builtin::BI__sync_val_compare_and_swap:
++   case Builtin::BI__sync_val_compare_and_swap_1:
++   case Builtin::BI__sync_val_compare_and_swap_2:
++   case Builtin::BI__sync_val_compare_and_swap_4:
++   case Builtin::BI__sync_val_compare_and_swap_8:
++   case Builtin::BI__sync_val_compare_and_swap_16:
++     BuiltinIndex = 12;
++     NumFixed = 2;
++     break;
++ 
++   case Builtin::BI__sync_bool_compare_and_swap:
++   case Builtin::BI__sync_bool_compare_and_swap_1:
++   case Builtin::BI__sync_bool_compare_and_swap_2:
++   case Builtin::BI__sync_bool_compare_and_swap_4:
++   case Builtin::BI__sync_bool_compare_and_swap_8:
++   case Builtin::BI__sync_bool_compare_and_swap_16:
++     BuiltinIndex = 13;
++     NumFixed = 2;
++     ResultType = Context.BoolTy;
++     break;
++ 
++   case Builtin::BI__sync_lock_test_and_set:
++   case Builtin::BI__sync_lock_test_and_set_1:
++   case Builtin::BI__sync_lock_test_and_set_2:
++   case Builtin::BI__sync_lock_test_and_set_4:
++   case Builtin::BI__sync_lock_test_and_set_8:
++   case Builtin::BI__sync_lock_test_and_set_16:
++     BuiltinIndex = 14;
++     break;
++ 
++   case Builtin::BI__sync_lock_release:
++   case Builtin::BI__sync_lock_release_1:
++   case Builtin::BI__sync_lock_release_2:
++   case Builtin::BI__sync_lock_release_4:
++   case Builtin::BI__sync_lock_release_8:
++   case Builtin::BI__sync_lock_release_16:
++     BuiltinIndex = 15;
++     NumFixed = 0;
++     ResultType = Context.VoidTy;
++     break;
++ 
++   case Builtin::BI__sync_swap:
++   case Builtin::BI__sync_swap_1:
++   case Builtin::BI__sync_swap_2:
++   case Builtin::BI__sync_swap_4:
++   case Builtin::BI__sync_swap_8:
++   case Builtin::BI__sync_swap_16:
++     BuiltinIndex = 16;
++     break;
++   }
++ 
++   // Now that we know how many fixed arguments we expect, first check that we
++   // have at least that many.
++   if (TheCall->getNumArgs() < 1+NumFixed) {
++     Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
++         << 0 << 1 + NumFixed << TheCall->getNumArgs()
++         << Callee->getSourceRange();
++     return ExprError();
++   }
++ 
++   Diag(TheCall->getEndLoc(), diag::warn_atomic_implicit_seq_cst)
++       << Callee->getSourceRange();
++ 
++   if (WarnAboutSemanticsChange) {
++     Diag(TheCall->getEndLoc(), diag::warn_sync_fetch_and_nand_semantics_change)
++         << Callee->getSourceRange();
++   }
++ 
++   // Get the decl for the concrete builtin from this, we can tell what the
++   // concrete integer type we should convert to is.
++   unsigned NewBuiltinID = BuiltinIndices[BuiltinIndex][SizeIndex];
++   const char *NewBuiltinName = Context.BuiltinInfo.getName(NewBuiltinID);
++   FunctionDecl *NewBuiltinDecl;
++   if (NewBuiltinID == BuiltinID)
++     NewBuiltinDecl = FDecl;
++   else {
++     // Perform builtin lookup to avoid redeclaring it.
++     DeclarationName DN(&Context.Idents.get(NewBuiltinName));
++     LookupResult Res(*this, DN, DRE->getBeginLoc(), LookupOrdinaryName);
++     LookupName(Res, TUScope, /*AllowBuiltinCreation=*/true);
++     assert(Res.getFoundDecl());
++     NewBuiltinDecl = dyn_cast<FunctionDecl>(Res.getFoundDecl());
++     if (!NewBuiltinDecl)
++       return ExprError();
++   }
++ 
++   // The first argument --- the pointer --- has a fixed type; we
++   // deduce the types of the rest of the arguments accordingly.  Walk
++   // the remaining arguments, converting them to the deduced value type.
++   for (unsigned i = 0; i != NumFixed; ++i) {
++     ExprResult Arg = TheCall->getArg(i+1);
++ 
++     // GCC does an implicit conversion to the pointer or integer ValType.  This
++     // can fail in some cases (1i -> int**), check for this error case now.
++     // Initialize the argument.
++     InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
++                                                    ValType, /*consume*/ false);
++     Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
++     if (Arg.isInvalid())
++       return ExprError();
++ 
++     // Okay, we have something that *can* be converted to the right type.  Check
++     // to see if there is a potentially weird extension going on here.  This can
++     // happen when you do an atomic operation on something like an char* and
++     // pass in 42.  The 42 gets converted to char.  This is even more strange
++     // for things like 45.123 -> char, etc.
++     // FIXME: Do this check.
++     TheCall->setArg(i+1, Arg.get());
++   }
++ 
++   // Create a new DeclRefExpr to refer to the new decl.
++   DeclRefExpr *NewDRE = DeclRefExpr::Create(
++       Context, DRE->getQualifierLoc(), SourceLocation(), NewBuiltinDecl,
++       /*enclosing*/ false, DRE->getLocation(), Context.BuiltinFnTy,
++       DRE->getValueKind(), nullptr, nullptr, DRE->isNonOdrUse());
++ 
++   // Set the callee in the CallExpr.
++   // FIXME: This loses syntactic information.
++   QualType CalleePtrTy = Context.getPointerType(NewBuiltinDecl->getType());
++   ExprResult PromotedCall = ImpCastExprToType(NewDRE, CalleePtrTy,
++                                               CK_BuiltinFnToFnPtr);
++   TheCall->setCallee(PromotedCall.get());
++ 
++   // Change the result type of the call to match the original value type. This
++   // is arbitrary, but the codegen for these builtins ins design to handle it
++   // gracefully.
++   TheCall->setType(ResultType);
++ 
++   // Prohibit use of _ExtInt with atomic builtins.
++   // The arguments would have already been converted to the first argument's
++   // type, so only need to check the first argument.
++   const auto *ExtIntValType = ValType->getAs<ExtIntType>();
++   if (ExtIntValType && !llvm::isPowerOf2_64(ExtIntValType->getNumBits())) {
++     Diag(FirstArg->getExprLoc(), diag::err_atomic_builtin_ext_int_size);
++     return ExprError();
++   }
++ 
++   return TheCallResult;
++ }
++ 
++ /// SemaBuiltinNontemporalOverloaded - We have a call to
++ /// __builtin_nontemporal_store or __builtin_nontemporal_load, which is an
++ /// overloaded function based on the pointer type of its last argument.
++ ///
++ /// This function goes through and does final semantic checking for these
++ /// builtins.
++ ExprResult Sema::SemaBuiltinNontemporalOverloaded(ExprResult TheCallResult) {
++   CallExpr *TheCall = (CallExpr *)TheCallResult.get();
++   DeclRefExpr *DRE =
++       cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
++   FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
++   unsigned BuiltinID = FDecl->getBuiltinID();
++   assert((BuiltinID == Builtin::BI__builtin_nontemporal_store ||
++           BuiltinID == Builtin::BI__builtin_nontemporal_load) &&
++          "Unexpected nontemporal load/store builtin!");
++   bool isStore = BuiltinID == Builtin::BI__builtin_nontemporal_store;
++   unsigned numArgs = isStore ? 2 : 1;
++ 
++   // Ensure that we have the proper number of arguments.
++   if (checkArgCount(*this, TheCall, numArgs))
++     return ExprError();
++ 
++   // Inspect the last argument of the nontemporal builtin.  This should always
++   // be a pointer type, from which we imply the type of the memory access.
++   // Because it is a pointer type, we don't have to worry about any implicit
++   // casts here.
++   Expr *PointerArg = TheCall->getArg(numArgs - 1);
++   ExprResult PointerArgResult =
++       DefaultFunctionArrayLvalueConversion(PointerArg);
++ 
++   if (PointerArgResult.isInvalid())
++     return ExprError();
++   PointerArg = PointerArgResult.get();
++   TheCall->setArg(numArgs - 1, PointerArg);
++ 
++   const PointerType *pointerType = PointerArg->getType()->getAs<PointerType>();
++   if (!pointerType) {
++     Diag(DRE->getBeginLoc(), diag::err_nontemporal_builtin_must_be_pointer)
++         << PointerArg->getType() << PointerArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   QualType ValType = pointerType->getPointeeType();
++ 
++   // Strip any qualifiers off ValType.
++   ValType = ValType.getUnqualifiedType();
++   if (!ValType->isIntegerType() && !ValType->isAnyPointerType() &&
++       !ValType->isBlockPointerType() && !ValType->isFloatingType() &&
++       !ValType->isVectorType()) {
++     Diag(DRE->getBeginLoc(),
++          diag::err_nontemporal_builtin_must_be_pointer_intfltptr_or_vector)
++         << PointerArg->getType() << PointerArg->getSourceRange();
++     return ExprError();
++   }
++ 
++   if (!isStore) {
++     TheCall->setType(ValType);
++     return TheCallResult;
++   }
++ 
++   ExprResult ValArg = TheCall->getArg(0);
++   InitializedEntity Entity = InitializedEntity::InitializeParameter(
++       Context, ValType, /*consume*/ false);
++   ValArg = PerformCopyInitialization(Entity, SourceLocation(), ValArg);
++   if (ValArg.isInvalid())
++     return ExprError();
++ 
++   TheCall->setArg(0, ValArg.get());
++   TheCall->setType(Context.VoidTy);
++   return TheCallResult;
++ }
++ 
++ /// CheckObjCString - Checks that the argument to the builtin
++ /// CFString constructor is correct
++ /// Note: It might also make sense to do the UTF-16 conversion here (would
++ /// simplify the backend).
++ bool Sema::CheckObjCString(Expr *Arg) {
++   Arg = Arg->IgnoreParenCasts();
++   StringLiteral *Literal = dyn_cast<StringLiteral>(Arg);
++ 
++   if (!Literal || !Literal->isAscii()) {
++     Diag(Arg->getBeginLoc(), diag::err_cfstring_literal_not_string_constant)
++         << Arg->getSourceRange();
++     return true;
++   }
++ 
++   if (Literal->containsNonAsciiOrNull()) {
++     StringRef String = Literal->getString();
++     unsigned NumBytes = String.size();
++     SmallVector<llvm::UTF16, 128> ToBuf(NumBytes);
++     const llvm::UTF8 *FromPtr = (const llvm::UTF8 *)String.data();
++     llvm::UTF16 *ToPtr = &ToBuf[0];
++ 
++     llvm::ConversionResult Result =
++         llvm::ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, &ToPtr,
++                                  ToPtr + NumBytes, llvm::strictConversion);
++     // Check for conversion failure.
++     if (Result != llvm::conversionOK)
++       Diag(Arg->getBeginLoc(), diag::warn_cfstring_truncated)
++           << Arg->getSourceRange();
++   }
++   return false;
++ }
++ 
++ /// CheckObjCString - Checks that the format string argument to the os_log()
++ /// and os_trace() functions is correct, and converts it to const char *.
++ ExprResult Sema::CheckOSLogFormatStringArg(Expr *Arg) {
++   Arg = Arg->IgnoreParenCasts();
++   auto *Literal = dyn_cast<StringLiteral>(Arg);
++   if (!Literal) {
++     if (auto *ObjcLiteral = dyn_cast<ObjCStringLiteral>(Arg)) {
++       Literal = ObjcLiteral->getString();
++     }
++   }
++ 
++   if (!Literal || (!Literal->isAscii() && !Literal->isUTF8())) {
++     return ExprError(
++         Diag(Arg->getBeginLoc(), diag::err_os_log_format_not_string_constant)
++         << Arg->getSourceRange());
++   }
++ 
++   ExprResult Result(Literal);
++   QualType ResultTy = Context.getPointerType(Context.CharTy.withConst());
++   InitializedEntity Entity =
++       InitializedEntity::InitializeParameter(Context, ResultTy, false);
++   Result = PerformCopyInitialization(Entity, SourceLocation(), Result);
++   return Result;
++ }
++ 
++ /// Check that the user is calling the appropriate va_start builtin for the
++ /// target and calling convention.
++ static bool checkVAStartABI(Sema &S, unsigned BuiltinID, Expr *Fn) {
++   const llvm::Triple &TT = S.Context.getTargetInfo().getTriple();
++   bool IsX64 = TT.getArch() == llvm::Triple::x86_64;
++   bool IsAArch64 = (TT.getArch() == llvm::Triple::aarch64 ||
++                     TT.getArch() == llvm::Triple::aarch64_32);
++   bool IsWindows = TT.isOSWindows();
++   bool IsMSVAStart = BuiltinID == Builtin::BI__builtin_ms_va_start;
++   if (IsX64 || IsAArch64) {
++     CallingConv CC = CC_C;
++     if (const FunctionDecl *FD = S.getCurFunctionDecl())
++       CC = FD->getType()->castAs<FunctionType>()->getCallConv();
++     if (IsMSVAStart) {
++       // Don't allow this in System V ABI functions.
++       if (CC == CC_X86_64SysV || (!IsWindows && CC != CC_Win64))
++         return S.Diag(Fn->getBeginLoc(),
++                       diag::err_ms_va_start_used_in_sysv_function);
++     } else {
++       // On x86-64/AArch64 Unix, don't allow this in Win64 ABI functions.
++       // On x64 Windows, don't allow this in System V ABI functions.
++       // (Yes, that means there's no corresponding way to support variadic
++       // System V ABI functions on Windows.)
++       if ((IsWindows && CC == CC_X86_64SysV) ||
++           (!IsWindows && CC == CC_Win64))
++         return S.Diag(Fn->getBeginLoc(),
++                       diag::err_va_start_used_in_wrong_abi_function)
++                << !IsWindows;
++     }
++     return false;
++   }
++ 
++   if (IsMSVAStart)
++     return S.Diag(Fn->getBeginLoc(), diag::err_builtin_x64_aarch64_only);
++   return false;
++ }
++ 
++ static bool checkVAStartIsInVariadicFunction(Sema &S, Expr *Fn,
++                                              ParmVarDecl **LastParam = nullptr) {
++   // Determine whether the current function, block, or obj-c method is variadic
++   // and get its parameter list.
++   bool IsVariadic = false;
++   ArrayRef<ParmVarDecl *> Params;
++   DeclContext *Caller = S.CurContext;
++   if (auto *Block = dyn_cast<BlockDecl>(Caller)) {
++     IsVariadic = Block->isVariadic();
++     Params = Block->parameters();
++   } else if (auto *FD = dyn_cast<FunctionDecl>(Caller)) {
++     IsVariadic = FD->isVariadic();
++     Params = FD->parameters();
++   } else if (auto *MD = dyn_cast<ObjCMethodDecl>(Caller)) {
++     IsVariadic = MD->isVariadic();
++     // FIXME: This isn't correct for methods (results in bogus warning).
++     Params = MD->parameters();
++   } else if (isa<CapturedDecl>(Caller)) {
++     // We don't support va_start in a CapturedDecl.
++     S.Diag(Fn->getBeginLoc(), diag::err_va_start_captured_stmt);
++     return true;
++   } else {
++     // This must be some other declcontext that parses exprs.
++     S.Diag(Fn->getBeginLoc(), diag::err_va_start_outside_function);
++     return true;
++   }
++ 
++   if (!IsVariadic) {
++     S.Diag(Fn->getBeginLoc(), diag::err_va_start_fixed_function);
++     return true;
++   }
++ 
++   if (LastParam)
++     *LastParam = Params.empty() ? nullptr : Params.back();
++ 
++   return false;
++ }
++ 
++ /// Check the arguments to '__builtin_va_start' or '__builtin_ms_va_start'
++ /// for validity.  Emit an error and return true on failure; return false
++ /// on success.
++ bool Sema::SemaBuiltinVAStart(unsigned BuiltinID, CallExpr *TheCall) {
++   Expr *Fn = TheCall->getCallee();
++ 
++   if (checkVAStartABI(*this, BuiltinID, Fn))
++     return true;
++ 
++   if (checkArgCount(*this, TheCall, 2))
++     return true;
++ 
++   // Type-check the first argument normally.
++   if (checkBuiltinArgument(*this, TheCall, 0))
++     return true;
++ 
++   // Check that the current function is variadic, and get its last parameter.
++   ParmVarDecl *LastParam;
++   if (checkVAStartIsInVariadicFunction(*this, Fn, &LastParam))
++     return true;
++ 
++   // Verify that the second argument to the builtin is the last argument of the
++   // current function or method.
++   bool SecondArgIsLastNamedArgument = false;
++   const Expr *Arg = TheCall->getArg(1)->IgnoreParenCasts();
++ 
++   // These are valid if SecondArgIsLastNamedArgument is false after the next
++   // block.
++   QualType Type;
++   SourceLocation ParamLoc;
++   bool IsCRegister = false;
++ 
++   if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(Arg)) {
++     if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(DR->getDecl())) {
++       SecondArgIsLastNamedArgument = PV == LastParam;
++ 
++       Type = PV->getType();
++       ParamLoc = PV->getLocation();
++       IsCRegister =
++           PV->getStorageClass() == SC_Register && !getLangOpts().CPlusPlus;
++     }
++   }
++ 
++   if (!SecondArgIsLastNamedArgument)
++     Diag(TheCall->getArg(1)->getBeginLoc(),
++          diag::warn_second_arg_of_va_start_not_last_named_param);
++   else if (IsCRegister || Type->isReferenceType() ||
++            Type->isSpecificBuiltinType(BuiltinType::Float) || [=] {
++              // Promotable integers are UB, but enumerations need a bit of
++              // extra checking to see what their promotable type actually is.
++              if (!Type->isPromotableIntegerType())
++                return false;
++              if (!Type->isEnumeralType())
++                return true;
++              const EnumDecl *ED = Type->castAs<EnumType>()->getDecl();
++              return !(ED &&
++                       Context.typesAreCompatible(ED->getPromotionType(), Type));
++            }()) {
++     unsigned Reason = 0;
++     if (Type->isReferenceType())  Reason = 1;
++     else if (IsCRegister)         Reason = 2;
++     Diag(Arg->getBeginLoc(), diag::warn_va_start_type_is_undefined) << Reason;
++     Diag(ParamLoc, diag::note_parameter_type) << Type;
++   }
++ 
++   TheCall->setType(Context.VoidTy);
++   return false;
++ }
++ 
++ bool Sema::SemaBuiltinVAStartARMMicrosoft(CallExpr *Call) {
++   auto IsSuitablyTypedFormatArgument = [this](const Expr *Arg) -> bool {
++     const LangOptions &LO = getLangOpts();
++ 
++     if (LO.CPlusPlus)
++       return Arg->getType()
++                  .getCanonicalType()
++                  .getTypePtr()
++                  ->getPointeeType()
++                  .withoutLocalFastQualifiers() == Context.CharTy;
++ 
++     // In C, allow aliasing through `char *`, this is required for AArch64 at
++     // least.
++     return true;
++   };
++ 
++   // void __va_start(va_list *ap, const char *named_addr, size_t slot_size,
++   //                 const char *named_addr);
++ 
++   Expr *Func = Call->getCallee();
++ 
++   if (Call->getNumArgs() < 3)
++     return Diag(Call->getEndLoc(),
++                 diag::err_typecheck_call_too_few_args_at_least)
++            << 0 /*function call*/ << 3 << Call->getNumArgs();
++ 
++   // Type-check the first argument normally.
++   if (checkBuiltinArgument(*this, Call, 0))
++     return true;
++ 
++   // Check that the current function is variadic.
++   if (checkVAStartIsInVariadicFunction(*this, Func))
++     return true;
++ 
++   // __va_start on Windows does not validate the parameter qualifiers
++ 
++   const Expr *Arg1 = Call->getArg(1)->IgnoreParens();
++   const Type *Arg1Ty = Arg1->getType().getCanonicalType().getTypePtr();
++ 
++   const Expr *Arg2 = Call->getArg(2)->IgnoreParens();
++   const Type *Arg2Ty = Arg2->getType().getCanonicalType().getTypePtr();
++ 
++   const QualType &ConstCharPtrTy =
++       Context.getPointerType(Context.CharTy.withConst());
++   if (!Arg1Ty->isPointerType() || !IsSuitablyTypedFormatArgument(Arg1))
++     Diag(Arg1->getBeginLoc(), diag::err_typecheck_convert_incompatible)
++         << Arg1->getType() << ConstCharPtrTy << 1 /* different class */
++         << 0                                      /* qualifier difference */
++         << 3                                      /* parameter mismatch */
++         << 2 << Arg1->getType() << ConstCharPtrTy;
++ 
++   const QualType SizeTy = Context.getSizeType();
++   if (Arg2Ty->getCanonicalTypeInternal().withoutLocalFastQualifiers() != SizeTy)
++     Diag(Arg2->getBeginLoc(), diag::err_typecheck_convert_incompatible)
++         << Arg2->getType() << SizeTy << 1 /* different class */
++         << 0                              /* qualifier difference */
++         << 3                              /* parameter mismatch */
++         << 3 << Arg2->getType() << SizeTy;
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinUnorderedCompare - Handle functions like __builtin_isgreater and
++ /// friends.  This is declared to take (...), so we have to check everything.
++ bool Sema::SemaBuiltinUnorderedCompare(CallExpr *TheCall) {
++   if (checkArgCount(*this, TheCall, 2))
++     return true;
++ 
++   ExprResult OrigArg0 = TheCall->getArg(0);
++   ExprResult OrigArg1 = TheCall->getArg(1);
++ 
++   // Do standard promotions between the two arguments, returning their common
++   // type.
++   QualType Res = UsualArithmeticConversions(
++       OrigArg0, OrigArg1, TheCall->getExprLoc(), ACK_Comparison);
++   if (OrigArg0.isInvalid() || OrigArg1.isInvalid())
++     return true;
++ 
++   // Make sure any conversions are pushed back into the call; this is
++   // type safe since unordered compare builtins are declared as "_Bool
++   // foo(...)".
++   TheCall->setArg(0, OrigArg0.get());
++   TheCall->setArg(1, OrigArg1.get());
++ 
++   if (OrigArg0.get()->isTypeDependent() || OrigArg1.get()->isTypeDependent())
++     return false;
++ 
++   // If the common type isn't a real floating type, then the arguments were
++   // invalid for this operation.
++   if (Res.isNull() || !Res->isRealFloatingType())
++     return Diag(OrigArg0.get()->getBeginLoc(),
++                 diag::err_typecheck_call_invalid_ordered_compare)
++            << OrigArg0.get()->getType() << OrigArg1.get()->getType()
++            << SourceRange(OrigArg0.get()->getBeginLoc(),
++                           OrigArg1.get()->getEndLoc());
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinSemaBuiltinFPClassification - Handle functions like
++ /// __builtin_isnan and friends.  This is declared to take (...), so we have
++ /// to check everything. We expect the last argument to be a floating point
++ /// value.
++ bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
++   if (checkArgCount(*this, TheCall, NumArgs))
++     return true;
++ 
++   // __builtin_fpclassify is the only case where NumArgs != 1, so we can count
++   // on all preceding parameters just being int.  Try all of those.
++   for (unsigned i = 0; i < NumArgs - 1; ++i) {
++     Expr *Arg = TheCall->getArg(i);
++ 
++     if (Arg->isTypeDependent())
++       return false;
++ 
++     ExprResult Res = PerformImplicitConversion(Arg, Context.IntTy, AA_Passing);
++ 
++     if (Res.isInvalid())
++       return true;
++     TheCall->setArg(i, Res.get());
++   }
++ 
++   Expr *OrigArg = TheCall->getArg(NumArgs-1);
++ 
++   if (OrigArg->isTypeDependent())
++     return false;
++ 
++   // Usual Unary Conversions will convert half to float, which we want for
++   // machines that use fp16 conversion intrinsics. Else, we wnat to leave the
++   // type how it is, but do normal L->Rvalue conversions.
++   if (Context.getTargetInfo().useFP16ConversionIntrinsics())
++     OrigArg = UsualUnaryConversions(OrigArg).get();
++   else
++     OrigArg = DefaultFunctionArrayLvalueConversion(OrigArg).get();
++   TheCall->setArg(NumArgs - 1, OrigArg);
++ 
++   // This operation requires a non-_Complex floating-point number.
++   if (!OrigArg->getType()->isRealFloatingType())
++     return Diag(OrigArg->getBeginLoc(),
++                 diag::err_typecheck_call_invalid_unary_fp)
++            << OrigArg->getType() << OrigArg->getSourceRange();
++ 
++   return false;
++ }
++ 
++ /// Perform semantic analysis for a call to __builtin_complex.
++ bool Sema::SemaBuiltinComplex(CallExpr *TheCall) {
++   if (checkArgCount(*this, TheCall, 2))
++     return true;
++ 
++   bool Dependent = false;
++   for (unsigned I = 0; I != 2; ++I) {
++     Expr *Arg = TheCall->getArg(I);
++     QualType T = Arg->getType();
++     if (T->isDependentType()) {
++       Dependent = true;
++       continue;
++     }
++ 
++     // Despite supporting _Complex int, GCC requires a real floating point type
++     // for the operands of __builtin_complex.
++     if (!T->isRealFloatingType()) {
++       return Diag(Arg->getBeginLoc(), diag::err_typecheck_call_requires_real_fp)
++              << Arg->getType() << Arg->getSourceRange();
++     }
++ 
++     ExprResult Converted = DefaultLvalueConversion(Arg);
++     if (Converted.isInvalid())
++       return true;
++     TheCall->setArg(I, Converted.get());
++   }
++ 
++   if (Dependent) {
++     TheCall->setType(Context.DependentTy);
++     return false;
++   }
++ 
++   Expr *Real = TheCall->getArg(0);
++   Expr *Imag = TheCall->getArg(1);
++   if (!Context.hasSameType(Real->getType(), Imag->getType())) {
++     return Diag(Real->getBeginLoc(),
++                 diag::err_typecheck_call_different_arg_types)
++            << Real->getType() << Imag->getType()
++            << Real->getSourceRange() << Imag->getSourceRange();
++   }
++ 
++   // We don't allow _Complex _Float16 nor _Complex __fp16 as type specifiers;
++   // don't allow this builtin to form those types either.
++   // FIXME: Should we allow these types?
++   if (Real->getType()->isFloat16Type())
++     return Diag(TheCall->getBeginLoc(), diag::err_invalid_complex_spec)
++            << "_Float16";
++   if (Real->getType()->isHalfType())
++     return Diag(TheCall->getBeginLoc(), diag::err_invalid_complex_spec)
++            << "half";
++ 
++   TheCall->setType(Context.getComplexType(Real->getType()));
++   return false;
++ }
++ 
++ // Customized Sema Checking for VSX builtins that have the following signature:
++ // vector [...] builtinName(vector [...], vector [...], const int);
++ // Which takes the same type of vectors (any legal vector type) for the first
++ // two arguments and takes compile time constant for the third argument.
++ // Example builtins are :
++ // vector double vec_xxpermdi(vector double, vector double, int);
++ // vector short vec_xxsldwi(vector short, vector short, int);
++ bool Sema::SemaBuiltinVSX(CallExpr *TheCall) {
++   unsigned ExpectedNumArgs = 3;
++   if (checkArgCount(*this, TheCall, ExpectedNumArgs))
++     return true;
++ 
++   // Check the third argument is a compile time constant
++   if (!TheCall->getArg(2)->isIntegerConstantExpr(Context))
++     return Diag(TheCall->getBeginLoc(),
++                 diag::err_vsx_builtin_nonconstant_argument)
++            << 3 /* argument index */ << TheCall->getDirectCallee()
++            << SourceRange(TheCall->getArg(2)->getBeginLoc(),
++                           TheCall->getArg(2)->getEndLoc());
++ 
++   QualType Arg1Ty = TheCall->getArg(0)->getType();
++   QualType Arg2Ty = TheCall->getArg(1)->getType();
++ 
++   // Check the type of argument 1 and argument 2 are vectors.
++   SourceLocation BuiltinLoc = TheCall->getBeginLoc();
++   if ((!Arg1Ty->isVectorType() && !Arg1Ty->isDependentType()) ||
++       (!Arg2Ty->isVectorType() && !Arg2Ty->isDependentType())) {
++     return Diag(BuiltinLoc, diag::err_vec_builtin_non_vector)
++            << TheCall->getDirectCallee()
++            << SourceRange(TheCall->getArg(0)->getBeginLoc(),
++                           TheCall->getArg(1)->getEndLoc());
++   }
++ 
++   // Check the first two arguments are the same type.
++   if (!Context.hasSameUnqualifiedType(Arg1Ty, Arg2Ty)) {
++     return Diag(BuiltinLoc, diag::err_vec_builtin_incompatible_vector)
++            << TheCall->getDirectCallee()
++            << SourceRange(TheCall->getArg(0)->getBeginLoc(),
++                           TheCall->getArg(1)->getEndLoc());
++   }
++ 
++   // When default clang type checking is turned off and the customized type
++   // checking is used, the returning type of the function must be explicitly
++   // set. Otherwise it is _Bool by default.
++   TheCall->setType(Arg1Ty);
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinShuffleVector - Handle __builtin_shufflevector.
++ // This is declared to take (...), so we have to check everything.
++ ExprResult Sema::SemaBuiltinShuffleVector(CallExpr *TheCall) {
++   if (TheCall->getNumArgs() < 2)
++     return ExprError(Diag(TheCall->getEndLoc(),
++                           diag::err_typecheck_call_too_few_args_at_least)
++                      << 0 /*function call*/ << 2 << TheCall->getNumArgs()
++                      << TheCall->getSourceRange());
++ 
++   // Determine which of the following types of shufflevector we're checking:
++   // 1) unary, vector mask: (lhs, mask)
++   // 2) binary, scalar mask: (lhs, rhs, index, ..., index)
++   QualType resType = TheCall->getArg(0)->getType();
++   unsigned numElements = 0;
++ 
++   if (!TheCall->getArg(0)->isTypeDependent() &&
++       !TheCall->getArg(1)->isTypeDependent()) {
++     QualType LHSType = TheCall->getArg(0)->getType();
++     QualType RHSType = TheCall->getArg(1)->getType();
++ 
++     if (!LHSType->isVectorType() || !RHSType->isVectorType())
++       return ExprError(
++           Diag(TheCall->getBeginLoc(), diag::err_vec_builtin_non_vector)
++           << TheCall->getDirectCallee()
++           << SourceRange(TheCall->getArg(0)->getBeginLoc(),
++                          TheCall->getArg(1)->getEndLoc()));
++ 
++     numElements = LHSType->castAs<VectorType>()->getNumElements();
++     unsigned numResElements = TheCall->getNumArgs() - 2;
++ 
++     // Check to see if we have a call with 2 vector arguments, the unary shuffle
++     // with mask.  If so, verify that RHS is an integer vector type with the
++     // same number of elts as lhs.
++     if (TheCall->getNumArgs() == 2) {
++       if (!RHSType->hasIntegerRepresentation() ||
++           RHSType->castAs<VectorType>()->getNumElements() != numElements)
++         return ExprError(Diag(TheCall->getBeginLoc(),
++                               diag::err_vec_builtin_incompatible_vector)
++                          << TheCall->getDirectCallee()
++                          << SourceRange(TheCall->getArg(1)->getBeginLoc(),
++                                         TheCall->getArg(1)->getEndLoc()));
++     } else if (!Context.hasSameUnqualifiedType(LHSType, RHSType)) {
++       return ExprError(Diag(TheCall->getBeginLoc(),
++                             diag::err_vec_builtin_incompatible_vector)
++                        << TheCall->getDirectCallee()
++                        << SourceRange(TheCall->getArg(0)->getBeginLoc(),
++                                       TheCall->getArg(1)->getEndLoc()));
++     } else if (numElements != numResElements) {
++       QualType eltType = LHSType->castAs<VectorType>()->getElementType();
++       resType = Context.getVectorType(eltType, numResElements,
++                                       VectorType::GenericVector);
++     }
++   }
++ 
++   for (unsigned i = 2; i < TheCall->getNumArgs(); i++) {
++     if (TheCall->getArg(i)->isTypeDependent() ||
++         TheCall->getArg(i)->isValueDependent())
++       continue;
++ 
++     Optional<llvm::APSInt> Result;
++     if (!(Result = TheCall->getArg(i)->getIntegerConstantExpr(Context)))
++       return ExprError(Diag(TheCall->getBeginLoc(),
++                             diag::err_shufflevector_nonconstant_argument)
++                        << TheCall->getArg(i)->getSourceRange());
++ 
++     // Allow -1 which will be translated to undef in the IR.
++     if (Result->isSigned() && Result->isAllOnesValue())
++       continue;
++ 
++     if (Result->getActiveBits() > 64 ||
++         Result->getZExtValue() >= numElements * 2)
++       return ExprError(Diag(TheCall->getBeginLoc(),
++                             diag::err_shufflevector_argument_too_large)
++                        << TheCall->getArg(i)->getSourceRange());
++   }
++ 
++   SmallVector<Expr*, 32> exprs;
++ 
++   for (unsigned i = 0, e = TheCall->getNumArgs(); i != e; i++) {
++     exprs.push_back(TheCall->getArg(i));
++     TheCall->setArg(i, nullptr);
++   }
++ 
++   return new (Context) ShuffleVectorExpr(Context, exprs, resType,
++                                          TheCall->getCallee()->getBeginLoc(),
++                                          TheCall->getRParenLoc());
++ }
++ 
++ /// SemaConvertVectorExpr - Handle __builtin_convertvector
++ ExprResult Sema::SemaConvertVectorExpr(Expr *E, TypeSourceInfo *TInfo,
++                                        SourceLocation BuiltinLoc,
++                                        SourceLocation RParenLoc) {
++   ExprValueKind VK = VK_PRValue;
++   ExprObjectKind OK = OK_Ordinary;
++   QualType DstTy = TInfo->getType();
++   QualType SrcTy = E->getType();
++ 
++   if (!SrcTy->isVectorType() && !SrcTy->isDependentType())
++     return ExprError(Diag(BuiltinLoc,
++                           diag::err_convertvector_non_vector)
++                      << E->getSourceRange());
++   if (!DstTy->isVectorType() && !DstTy->isDependentType())
++     return ExprError(Diag(BuiltinLoc,
++                           diag::err_convertvector_non_vector_type));
++ 
++   if (!SrcTy->isDependentType() && !DstTy->isDependentType()) {
++     unsigned SrcElts = SrcTy->castAs<VectorType>()->getNumElements();
++     unsigned DstElts = DstTy->castAs<VectorType>()->getNumElements();
++     if (SrcElts != DstElts)
++       return ExprError(Diag(BuiltinLoc,
++                             diag::err_convertvector_incompatible_vector)
++                        << E->getSourceRange());
++   }
++ 
++   return new (Context)
++       ConvertVectorExpr(E, TInfo, DstTy, VK, OK, BuiltinLoc, RParenLoc);
++ }
++ 
++ /// SemaBuiltinPrefetch - Handle __builtin_prefetch.
++ // This is declared to take (const void*, ...) and can take two
++ // optional constant int args.
++ bool Sema::SemaBuiltinPrefetch(CallExpr *TheCall) {
++   unsigned NumArgs = TheCall->getNumArgs();
++ 
++   if (NumArgs > 3)
++     return Diag(TheCall->getEndLoc(),
++                 diag::err_typecheck_call_too_many_args_at_most)
++            << 0 /*function call*/ << 3 << NumArgs << TheCall->getSourceRange();
++ 
++   // Argument 0 is checked for us and the remaining arguments must be
++   // constant integers.
++   for (unsigned i = 1; i != NumArgs; ++i)
++     if (SemaBuiltinConstantArgRange(TheCall, i, 0, i == 1 ? 1 : 3))
++       return true;
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinArithmeticFence - Handle __arithmetic_fence.
++ bool Sema::SemaBuiltinArithmeticFence(CallExpr *TheCall) {
++   if (!Context.getTargetInfo().checkArithmeticFenceSupported())
++     return Diag(TheCall->getBeginLoc(), diag::err_builtin_target_unsupported)
++            << SourceRange(TheCall->getBeginLoc(), TheCall->getEndLoc());
++   if (checkArgCount(*this, TheCall, 1))
++     return true;
++   Expr *Arg = TheCall->getArg(0);
++   if (Arg->isInstantiationDependent())
++     return false;
++ 
++   QualType ArgTy = Arg->getType();
++   if (!ArgTy->hasFloatingRepresentation())
++     return Diag(TheCall->getEndLoc(), diag::err_typecheck_expect_flt_or_vector)
++            << ArgTy;
++   if (Arg->isLValue()) {
++     ExprResult FirstArg = DefaultLvalueConversion(Arg);
++     TheCall->setArg(0, FirstArg.get());
++   }
++   TheCall->setType(TheCall->getArg(0)->getType());
++   return false;
++ }
++ 
++ /// SemaBuiltinAssume - Handle __assume (MS Extension).
++ // __assume does not evaluate its arguments, and should warn if its argument
++ // has side effects.
++ bool Sema::SemaBuiltinAssume(CallExpr *TheCall) {
++   Expr *Arg = TheCall->getArg(0);
++   if (Arg->isInstantiationDependent()) return false;
++ 
++   if (Arg->HasSideEffects(Context))
++     Diag(Arg->getBeginLoc(), diag::warn_assume_side_effects)
++         << Arg->getSourceRange()
++         << cast<FunctionDecl>(TheCall->getCalleeDecl())->getIdentifier();
++ 
++   return false;
++ }
++ 
++ /// Handle __builtin_alloca_with_align. This is declared
++ /// as (size_t, size_t) where the second size_t must be a power of 2 greater
++ /// than 8.
++ bool Sema::SemaBuiltinAllocaWithAlign(CallExpr *TheCall) {
++   // The alignment must be a constant integer.
++   Expr *Arg = TheCall->getArg(1);
++ 
++   // We can't check the value of a dependent argument.
++   if (!Arg->isTypeDependent() && !Arg->isValueDependent()) {
++     if (const auto *UE =
++             dyn_cast<UnaryExprOrTypeTraitExpr>(Arg->IgnoreParenImpCasts()))
++       if (UE->getKind() == UETT_AlignOf ||
++           UE->getKind() == UETT_PreferredAlignOf)
++         Diag(TheCall->getBeginLoc(), diag::warn_alloca_align_alignof)
++             << Arg->getSourceRange();
++ 
++     llvm::APSInt Result = Arg->EvaluateKnownConstInt(Context);
++ 
++     if (!Result.isPowerOf2())
++       return Diag(TheCall->getBeginLoc(), diag::err_alignment_not_power_of_two)
++              << Arg->getSourceRange();
++ 
++     if (Result < Context.getCharWidth())
++       return Diag(TheCall->getBeginLoc(), diag::err_alignment_too_small)
++              << (unsigned)Context.getCharWidth() << Arg->getSourceRange();
++ 
++     if (Result > std::numeric_limits<int32_t>::max())
++       return Diag(TheCall->getBeginLoc(), diag::err_alignment_too_big)
++              << std::numeric_limits<int32_t>::max() << Arg->getSourceRange();
++   }
++ 
++   return false;
++ }
++ 
++ /// Handle __builtin_assume_aligned. This is declared
++ /// as (const void*, size_t, ...) and can take one optional constant int arg.
++ bool Sema::SemaBuiltinAssumeAligned(CallExpr *TheCall) {
++   unsigned NumArgs = TheCall->getNumArgs();
++ 
++   if (NumArgs > 3)
++     return Diag(TheCall->getEndLoc(),
++                 diag::err_typecheck_call_too_many_args_at_most)
++            << 0 /*function call*/ << 3 << NumArgs << TheCall->getSourceRange();
++ 
++   // The alignment must be a constant integer.
++   Expr *Arg = TheCall->getArg(1);
++ 
++   // We can't check the value of a dependent argument.
++   if (!Arg->isTypeDependent() && !Arg->isValueDependent()) {
++     llvm::APSInt Result;
++     if (SemaBuiltinConstantArg(TheCall, 1, Result))
++       return true;
++ 
++     if (!Result.isPowerOf2())
++       return Diag(TheCall->getBeginLoc(), diag::err_alignment_not_power_of_two)
++              << Arg->getSourceRange();
++ 
++     if (Result > Sema::MaximumAlignment)
++       Diag(TheCall->getBeginLoc(), diag::warn_assume_aligned_too_great)
++           << Arg->getSourceRange() << Sema::MaximumAlignment;
++   }
++ 
++   if (NumArgs > 2) {
++     ExprResult Arg(TheCall->getArg(2));
++     InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
++       Context.getSizeType(), false);
++     Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
++     if (Arg.isInvalid()) return true;
++     TheCall->setArg(2, Arg.get());
++   }
++ 
++   return false;
++ }
++ 
++ bool Sema::SemaBuiltinOSLogFormat(CallExpr *TheCall) {
++   unsigned BuiltinID =
++       cast<FunctionDecl>(TheCall->getCalleeDecl())->getBuiltinID();
++   bool IsSizeCall = BuiltinID == Builtin::BI__builtin_os_log_format_buffer_size;
++ 
++   unsigned NumArgs = TheCall->getNumArgs();
++   unsigned NumRequiredArgs = IsSizeCall ? 1 : 2;
++   if (NumArgs < NumRequiredArgs) {
++     return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
++            << 0 /* function call */ << NumRequiredArgs << NumArgs
++            << TheCall->getSourceRange();
++   }
++   if (NumArgs >= NumRequiredArgs + 0x100) {
++     return Diag(TheCall->getEndLoc(),
++                 diag::err_typecheck_call_too_many_args_at_most)
++            << 0 /* function call */ << (NumRequiredArgs + 0xff) << NumArgs
++            << TheCall->getSourceRange();
++   }
++   unsigned i = 0;
++ 
++   // For formatting call, check buffer arg.
++   if (!IsSizeCall) {
++     ExprResult Arg(TheCall->getArg(i));
++     InitializedEntity Entity = InitializedEntity::InitializeParameter(
++         Context, Context.VoidPtrTy, false);
++     Arg = PerformCopyInitialization(Entity, SourceLocation(), Arg);
++     if (Arg.isInvalid())
++       return true;
++     TheCall->setArg(i, Arg.get());
++     i++;
++   }
++ 
++   // Check string literal arg.
++   unsigned FormatIdx = i;
++   {
++     ExprResult Arg = CheckOSLogFormatStringArg(TheCall->getArg(i));
++     if (Arg.isInvalid())
++       return true;
++     TheCall->setArg(i, Arg.get());
++     i++;
++   }
++ 
++   // Make sure variadic args are scalar.
++   unsigned FirstDataArg = i;
++   while (i < NumArgs) {
++     ExprResult Arg = DefaultVariadicArgumentPromotion(
++         TheCall->getArg(i), VariadicFunction, nullptr);
++     if (Arg.isInvalid())
++       return true;
++     CharUnits ArgSize = Context.getTypeSizeInChars(Arg.get()->getType());
++     if (ArgSize.getQuantity() >= 0x100) {
++       return Diag(Arg.get()->getEndLoc(), diag::err_os_log_argument_too_big)
++              << i << (int)ArgSize.getQuantity() << 0xff
++              << TheCall->getSourceRange();
++     }
++     TheCall->setArg(i, Arg.get());
++     i++;
++   }
++ 
++   // Check formatting specifiers. NOTE: We're only doing this for the non-size
++   // call to avoid duplicate diagnostics.
++   if (!IsSizeCall) {
++     llvm::SmallBitVector CheckedVarArgs(NumArgs, false);
++     ArrayRef<const Expr *> Args(TheCall->getArgs(), TheCall->getNumArgs());
++     bool Success = CheckFormatArguments(
++         Args, /*HasVAListArg*/ false, FormatIdx, FirstDataArg, FST_OSLog,
++         VariadicFunction, TheCall->getBeginLoc(), SourceRange(),
++         CheckedVarArgs);
++     if (!Success)
++       return true;
++   }
++ 
++   if (IsSizeCall) {
++     TheCall->setType(Context.getSizeType());
++   } else {
++     TheCall->setType(Context.VoidPtrTy);
++   }
++   return false;
++ }
++ 
++ /// SemaBuiltinConstantArg - Handle a check if argument ArgNum of CallExpr
++ /// TheCall is a constant expression.
++ bool Sema::SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum,
++                                   llvm::APSInt &Result) {
++   Expr *Arg = TheCall->getArg(ArgNum);
++   DeclRefExpr *DRE =cast<DeclRefExpr>(TheCall->getCallee()->IgnoreParenCasts());
++   FunctionDecl *FDecl = cast<FunctionDecl>(DRE->getDecl());
++ 
++   if (Arg->isTypeDependent() || Arg->isValueDependent()) return false;
++ 
++   Optional<llvm::APSInt> R;
++   if (!(R = Arg->getIntegerConstantExpr(Context)))
++     return Diag(TheCall->getBeginLoc(), diag::err_constant_integer_arg_type)
++            << FDecl->getDeclName() << Arg->getSourceRange();
++   Result = *R;
++   return false;
++ }
++ 
++ /// SemaBuiltinConstantArgRange - Handle a check if argument ArgNum of CallExpr
++ /// TheCall is a constant expression in the range [Low, High].
++ bool Sema::SemaBuiltinConstantArgRange(CallExpr *TheCall, int ArgNum,
++                                        int Low, int High, bool RangeIsError) {
++   if (isConstantEvaluated())
++     return false;
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   if (Result.getSExtValue() < Low || Result.getSExtValue() > High) {
++     if (RangeIsError)
++       return Diag(TheCall->getBeginLoc(), diag::err_argument_invalid_range)
++              << toString(Result, 10) << Low << High << Arg->getSourceRange();
++     else
++       // Defer the warning until we know if the code will be emitted so that
++       // dead code can ignore this.
++       DiagRuntimeBehavior(TheCall->getBeginLoc(), TheCall,
++                           PDiag(diag::warn_argument_invalid_range)
++                               << toString(Result, 10) << Low << High
++                               << Arg->getSourceRange());
++   }
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinConstantArgMultiple - Handle a check if argument ArgNum of CallExpr
++ /// TheCall is a constant expression is a multiple of Num..
++ bool Sema::SemaBuiltinConstantArgMultiple(CallExpr *TheCall, int ArgNum,
++                                           unsigned Num) {
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   if (Result.getSExtValue() % Num != 0)
++     return Diag(TheCall->getBeginLoc(), diag::err_argument_not_multiple)
++            << Num << Arg->getSourceRange();
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinConstantArgPower2 - Check if argument ArgNum of TheCall is a
++ /// constant expression representing a power of 2.
++ bool Sema::SemaBuiltinConstantArgPower2(CallExpr *TheCall, int ArgNum) {
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   // Bit-twiddling to test for a power of 2: for x > 0, x & (x-1) is zero if
++   // and only if x is a power of 2.
++   if (Result.isStrictlyPositive() && (Result & (Result - 1)) == 0)
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(), diag::err_argument_not_power_of_2)
++          << Arg->getSourceRange();
++ }
++ 
++ static bool IsShiftedByte(llvm::APSInt Value) {
++   if (Value.isNegative())
++     return false;
++ 
++   // Check if it's a shifted byte, by shifting it down
++   while (true) {
++     // If the value fits in the bottom byte, the check passes.
++     if (Value < 0x100)
++       return true;
++ 
++     // Otherwise, if the value has _any_ bits in the bottom byte, the check
++     // fails.
++     if ((Value & 0xFF) != 0)
++       return false;
++ 
++     // If the bottom 8 bits are all 0, but something above that is nonzero,
++     // then shifting the value right by 8 bits won't affect whether it's a
++     // shifted byte or not. So do that, and go round again.
++     Value >>= 8;
++   }
++ }
++ 
++ /// SemaBuiltinConstantArgShiftedByte - Check if argument ArgNum of TheCall is
++ /// a constant expression representing an arbitrary byte value shifted left by
++ /// a multiple of 8 bits.
++ bool Sema::SemaBuiltinConstantArgShiftedByte(CallExpr *TheCall, int ArgNum,
++                                              unsigned ArgBits) {
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   // Truncate to the given size.
++   Result = Result.getLoBits(ArgBits);
++   Result.setIsUnsigned(true);
++ 
++   if (IsShiftedByte(Result))
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(), diag::err_argument_not_shifted_byte)
++          << Arg->getSourceRange();
++ }
++ 
++ /// SemaBuiltinConstantArgShiftedByteOr0xFF - Check if argument ArgNum of
++ /// TheCall is a constant expression representing either a shifted byte value,
++ /// or a value of the form 0x??FF (i.e. a member of the arithmetic progression
++ /// 0x00FF, 0x01FF, ..., 0xFFFF). This strange range check is needed for some
++ /// Arm MVE intrinsics.
++ bool Sema::SemaBuiltinConstantArgShiftedByteOrXXFF(CallExpr *TheCall,
++                                                    int ArgNum,
++                                                    unsigned ArgBits) {
++   llvm::APSInt Result;
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check constant-ness first.
++   if (SemaBuiltinConstantArg(TheCall, ArgNum, Result))
++     return true;
++ 
++   // Truncate to the given size.
++   Result = Result.getLoBits(ArgBits);
++   Result.setIsUnsigned(true);
++ 
++   // Check to see if it's in either of the required forms.
++   if (IsShiftedByte(Result) ||
++       (Result > 0 && Result < 0x10000 && (Result & 0xFF) == 0xFF))
++     return false;
++ 
++   return Diag(TheCall->getBeginLoc(),
++               diag::err_argument_not_shifted_byte_or_xxff)
++          << Arg->getSourceRange();
++ }
++ 
++ /// SemaBuiltinARMMemoryTaggingCall - Handle calls of memory tagging extensions
++ bool Sema::SemaBuiltinARMMemoryTaggingCall(unsigned BuiltinID, CallExpr *TheCall) {
++   if (BuiltinID == AArch64::BI__builtin_arm_irg) {
++     if (checkArgCount(*this, TheCall, 2))
++       return true;
++     Expr *Arg0 = TheCall->getArg(0);
++     Expr *Arg1 = TheCall->getArg(1);
++ 
++     ExprResult FirstArg = DefaultFunctionArrayLvalueConversion(Arg0);
++     if (FirstArg.isInvalid())
++       return true;
++     QualType FirstArgType = FirstArg.get()->getType();
++     if (!FirstArgType->isAnyPointerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_pointer)
++                << "first" << FirstArgType << Arg0->getSourceRange();
++     TheCall->setArg(0, FirstArg.get());
++ 
++     ExprResult SecArg = DefaultLvalueConversion(Arg1);
++     if (SecArg.isInvalid())
++       return true;
++     QualType SecArgType = SecArg.get()->getType();
++     if (!SecArgType->isIntegerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_integer)
++                << "second" << SecArgType << Arg1->getSourceRange();
++ 
++     // Derive the return type from the pointer argument.
++     TheCall->setType(FirstArgType);
++     return false;
++   }
++ 
++   if (BuiltinID == AArch64::BI__builtin_arm_addg) {
++     if (checkArgCount(*this, TheCall, 2))
++       return true;
++ 
++     Expr *Arg0 = TheCall->getArg(0);
++     ExprResult FirstArg = DefaultFunctionArrayLvalueConversion(Arg0);
++     if (FirstArg.isInvalid())
++       return true;
++     QualType FirstArgType = FirstArg.get()->getType();
++     if (!FirstArgType->isAnyPointerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_pointer)
++                << "first" << FirstArgType << Arg0->getSourceRange();
++     TheCall->setArg(0, FirstArg.get());
++ 
++     // Derive the return type from the pointer argument.
++     TheCall->setType(FirstArgType);
++ 
++     // Second arg must be an constant in range [0,15]
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15);
++   }
++ 
++   if (BuiltinID == AArch64::BI__builtin_arm_gmi) {
++     if (checkArgCount(*this, TheCall, 2))
++       return true;
++     Expr *Arg0 = TheCall->getArg(0);
++     Expr *Arg1 = TheCall->getArg(1);
++ 
++     ExprResult FirstArg = DefaultFunctionArrayLvalueConversion(Arg0);
++     if (FirstArg.isInvalid())
++       return true;
++     QualType FirstArgType = FirstArg.get()->getType();
++     if (!FirstArgType->isAnyPointerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_pointer)
++                << "first" << FirstArgType << Arg0->getSourceRange();
++ 
++     QualType SecArgType = Arg1->getType();
++     if (!SecArgType->isIntegerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_integer)
++                << "second" << SecArgType << Arg1->getSourceRange();
++     TheCall->setType(Context.IntTy);
++     return false;
++   }
++ 
++   if (BuiltinID == AArch64::BI__builtin_arm_ldg ||
++       BuiltinID == AArch64::BI__builtin_arm_stg) {
++     if (checkArgCount(*this, TheCall, 1))
++       return true;
++     Expr *Arg0 = TheCall->getArg(0);
++     ExprResult FirstArg = DefaultFunctionArrayLvalueConversion(Arg0);
++     if (FirstArg.isInvalid())
++       return true;
++ 
++     QualType FirstArgType = FirstArg.get()->getType();
++     if (!FirstArgType->isAnyPointerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_pointer)
++                << "first" << FirstArgType << Arg0->getSourceRange();
++     TheCall->setArg(0, FirstArg.get());
++ 
++     // Derive the return type from the pointer argument.
++     if (BuiltinID == AArch64::BI__builtin_arm_ldg)
++       TheCall->setType(FirstArgType);
++     return false;
++   }
++ 
++   if (BuiltinID == AArch64::BI__builtin_arm_subp) {
++     Expr *ArgA = TheCall->getArg(0);
++     Expr *ArgB = TheCall->getArg(1);
++ 
++     ExprResult ArgExprA = DefaultFunctionArrayLvalueConversion(ArgA);
++     ExprResult ArgExprB = DefaultFunctionArrayLvalueConversion(ArgB);
++ 
++     if (ArgExprA.isInvalid() || ArgExprB.isInvalid())
++       return true;
++ 
++     QualType ArgTypeA = ArgExprA.get()->getType();
++     QualType ArgTypeB = ArgExprB.get()->getType();
++ 
++     auto isNull = [&] (Expr *E) -> bool {
++       return E->isNullPointerConstant(
++                         Context, Expr::NPC_ValueDependentIsNotNull); };
++ 
++     // argument should be either a pointer or null
++     if (!ArgTypeA->isAnyPointerType() && !isNull(ArgA))
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_null_or_pointer)
++         << "first" << ArgTypeA << ArgA->getSourceRange();
++ 
++     if (!ArgTypeB->isAnyPointerType() && !isNull(ArgB))
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_null_or_pointer)
++         << "second" << ArgTypeB << ArgB->getSourceRange();
++ 
++     // Ensure Pointee types are compatible
++     if (ArgTypeA->isAnyPointerType() && !isNull(ArgA) &&
++         ArgTypeB->isAnyPointerType() && !isNull(ArgB)) {
++       QualType pointeeA = ArgTypeA->getPointeeType();
++       QualType pointeeB = ArgTypeB->getPointeeType();
++       if (!Context.typesAreCompatible(
++              Context.getCanonicalType(pointeeA).getUnqualifiedType(),
++              Context.getCanonicalType(pointeeB).getUnqualifiedType())) {
++         return Diag(TheCall->getBeginLoc(), diag::err_typecheck_sub_ptr_compatible)
++           << ArgTypeA <<  ArgTypeB << ArgA->getSourceRange()
++           << ArgB->getSourceRange();
++       }
++     }
++ 
++     // at least one argument should be pointer type
++     if (!ArgTypeA->isAnyPointerType() && !ArgTypeB->isAnyPointerType())
++       return Diag(TheCall->getBeginLoc(), diag::err_memtag_any2arg_pointer)
++         <<  ArgTypeA << ArgTypeB << ArgA->getSourceRange();
++ 
++     if (isNull(ArgA)) // adopt type of the other pointer
++       ArgExprA = ImpCastExprToType(ArgExprA.get(), ArgTypeB, CK_NullToPointer);
++ 
++     if (isNull(ArgB))
++       ArgExprB = ImpCastExprToType(ArgExprB.get(), ArgTypeA, CK_NullToPointer);
++ 
++     TheCall->setArg(0, ArgExprA.get());
++     TheCall->setArg(1, ArgExprB.get());
++     TheCall->setType(Context.LongLongTy);
++     return false;
++   }
++   assert(false && "Unhandled ARM MTE intrinsic");
++   return true;
++ }
++ 
++ /// SemaBuiltinARMSpecialReg - Handle a check if argument ArgNum of CallExpr
++ /// TheCall is an ARM/AArch64 special register string literal.
++ bool Sema::SemaBuiltinARMSpecialReg(unsigned BuiltinID, CallExpr *TheCall,
++                                     int ArgNum, unsigned ExpectedFieldNum,
++                                     bool AllowName) {
++   bool IsARMBuiltin = BuiltinID == ARM::BI__builtin_arm_rsr64 ||
++                       BuiltinID == ARM::BI__builtin_arm_wsr64 ||
++                       BuiltinID == ARM::BI__builtin_arm_rsr ||
++                       BuiltinID == ARM::BI__builtin_arm_rsrp ||
++                       BuiltinID == ARM::BI__builtin_arm_wsr ||
++                       BuiltinID == ARM::BI__builtin_arm_wsrp;
++   bool IsAArch64Builtin = BuiltinID == AArch64::BI__builtin_arm_rsr64 ||
++                           BuiltinID == AArch64::BI__builtin_arm_wsr64 ||
++                           BuiltinID == AArch64::BI__builtin_arm_rsr ||
++                           BuiltinID == AArch64::BI__builtin_arm_rsrp ||
++                           BuiltinID == AArch64::BI__builtin_arm_wsr ||
++                           BuiltinID == AArch64::BI__builtin_arm_wsrp;
++   assert((IsARMBuiltin || IsAArch64Builtin) && "Unexpected ARM builtin.");
++ 
++   // We can't check the value of a dependent argument.
++   Expr *Arg = TheCall->getArg(ArgNum);
++   if (Arg->isTypeDependent() || Arg->isValueDependent())
++     return false;
++ 
++   // Check if the argument is a string literal.
++   if (!isa<StringLiteral>(Arg->IgnoreParenImpCasts()))
++     return Diag(TheCall->getBeginLoc(), diag::err_expr_not_string_literal)
++            << Arg->getSourceRange();
++ 
++   // Check the type of special register given.
++   StringRef Reg = cast<StringLiteral>(Arg->IgnoreParenImpCasts())->getString();
++   SmallVector<StringRef, 6> Fields;
++   Reg.split(Fields, ":");
++ 
++   if (Fields.size() != ExpectedFieldNum && !(AllowName && Fields.size() == 1))
++     return Diag(TheCall->getBeginLoc(), diag::err_arm_invalid_specialreg)
++            << Arg->getSourceRange();
++ 
++   // If the string is the name of a register then we cannot check that it is
++   // valid here but if the string is of one the forms described in ACLE then we
++   // can check that the supplied fields are integers and within the valid
++   // ranges.
++   if (Fields.size() > 1) {
++     bool FiveFields = Fields.size() == 5;
++ 
++     bool ValidString = true;
++     if (IsARMBuiltin) {
++       ValidString &= Fields[0].startswith_insensitive("cp") ||
++                      Fields[0].startswith_insensitive("p");
++       if (ValidString)
++         Fields[0] = Fields[0].drop_front(
++             Fields[0].startswith_insensitive("cp") ? 2 : 1);
++ 
++       ValidString &= Fields[2].startswith_insensitive("c");
++       if (ValidString)
++         Fields[2] = Fields[2].drop_front(1);
++ 
++       if (FiveFields) {
++         ValidString &= Fields[3].startswith_insensitive("c");
++         if (ValidString)
++           Fields[3] = Fields[3].drop_front(1);
++       }
++     }
++ 
++     SmallVector<int, 5> Ranges;
++     if (FiveFields)
++       Ranges.append({IsAArch64Builtin ? 1 : 15, 7, 15, 15, 7});
++     else
++       Ranges.append({15, 7, 15});
++ 
++     for (unsigned i=0; i<Fields.size(); ++i) {
++       int IntField;
++       ValidString &= !Fields[i].getAsInteger(10, IntField);
++       ValidString &= (IntField >= 0 && IntField <= Ranges[i]);
++     }
++ 
++     if (!ValidString)
++       return Diag(TheCall->getBeginLoc(), diag::err_arm_invalid_specialreg)
++              << Arg->getSourceRange();
++   } else if (IsAArch64Builtin && Fields.size() == 1) {
++     // If the register name is one of those that appear in the condition below
++     // and the special register builtin being used is one of the write builtins,
++     // then we require that the argument provided for writing to the register
++     // is an integer constant expression. This is because it will be lowered to
++     // an MSR (immediate) instruction, so we need to know the immediate at
++     // compile time.
++     if (TheCall->getNumArgs() != 2)
++       return false;
++ 
++     std::string RegLower = Reg.lower();
++     if (RegLower != "spsel" && RegLower != "daifset" && RegLower != "daifclr" &&
++         RegLower != "pan" && RegLower != "uao")
++       return false;
++ 
++     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 15);
++   }
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinPPCMMACall - Check the call to a PPC MMA builtin for validity.
++ /// Emit an error and return true on failure; return false on success.
++ /// TypeStr is a string containing the type descriptor of the value returned by
++ /// the builtin and the descriptors of the expected type of the arguments.
++ bool Sema::SemaBuiltinPPCMMACall(CallExpr *TheCall, const char *TypeStr) {
++ 
++   assert((TypeStr[0] != '\0') &&
++          "Invalid types in PPC MMA builtin declaration");
++ 
++   unsigned Mask = 0;
++   unsigned ArgNum = 0;
++ 
++   // The first type in TypeStr is the type of the value returned by the
++   // builtin. So we first read that type and change the type of TheCall.
++   QualType type = DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
++   TheCall->setType(type);
++ 
++   while (*TypeStr != '\0') {
++     Mask = 0;
++     QualType ExpectedType = DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
++     if (ArgNum >= TheCall->getNumArgs()) {
++       ArgNum++;
++       break;
++     }
++ 
++     Expr *Arg = TheCall->getArg(ArgNum);
++     QualType ArgType = Arg->getType();
++ 
++     if ((ExpectedType->isVoidPointerType() && !ArgType->isPointerType()) ||
++         (!ExpectedType->isVoidPointerType() &&
++            ArgType.getCanonicalType() != ExpectedType))
++       return Diag(Arg->getBeginLoc(), diag::err_typecheck_convert_incompatible)
++              << ArgType << ExpectedType << 1 << 0 << 0;
++ 
++     // If the value of the Mask is not 0, we have a constraint in the size of
++     // the integer argument so here we ensure the argument is a constant that
++     // is in the valid range.
++     if (Mask != 0 &&
++         SemaBuiltinConstantArgRange(TheCall, ArgNum, 0, Mask, true))
++       return true;
++ 
++     ArgNum++;
++   }
++ 
++   // In case we exited early from the previous loop, there are other types to
++   // read from TypeStr. So we need to read them all to ensure we have the right
++   // number of arguments in TheCall and if it is not the case, to display a
++   // better error message.
++   while (*TypeStr != '\0') {
++     (void) DecodePPCMMATypeFromStr(Context, TypeStr, Mask);
++     ArgNum++;
++   }
++   if (checkArgCount(*this, TheCall, ArgNum))
++     return true;
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinLongjmp - Handle __builtin_longjmp(void *env[5], int val).
++ /// This checks that the target supports __builtin_longjmp and
++ /// that val is a constant 1.
++ bool Sema::SemaBuiltinLongjmp(CallExpr *TheCall) {
++   if (!Context.getTargetInfo().hasSjLjLowering())
++     return Diag(TheCall->getBeginLoc(), diag::err_builtin_longjmp_unsupported)
++            << SourceRange(TheCall->getBeginLoc(), TheCall->getEndLoc());
++ 
++   Expr *Arg = TheCall->getArg(1);
++   llvm::APSInt Result;
++ 
++   // TODO: This is less than ideal. Overload this to take a value.
++   if (SemaBuiltinConstantArg(TheCall, 1, Result))
++     return true;
++ 
++   if (Result != 1)
++     return Diag(TheCall->getBeginLoc(), diag::err_builtin_longjmp_invalid_val)
++            << SourceRange(Arg->getBeginLoc(), Arg->getEndLoc());
++ 
++   return false;
++ }
++ 
++ /// SemaBuiltinSetjmp - Handle __builtin_setjmp(void *env[5]).
++ /// This checks that the target supports __builtin_setjmp.
++ bool Sema::SemaBuiltinSetjmp(CallExpr *TheCall) {
++   if (!Context.getTargetInfo().hasSjLjLowering())
++     return Diag(TheCall->getBeginLoc(), diag::err_builtin_setjmp_unsupported)
++            << SourceRange(TheCall->getBeginLoc(), TheCall->getEndLoc());
++   return false;
++ }
++ 
++ namespace {
++ 
++ class UncoveredArgHandler {
++   enum { Unknown = -1, AllCovered = -2 };
++ 
++   signed FirstUncoveredArg = Unknown;
++   SmallVector<const Expr *, 4> DiagnosticExprs;
++ 
++ public:
++   UncoveredArgHandler() = default;
++ 
++   bool hasUncoveredArg() const {
++     return (FirstUncoveredArg >= 0);
++   }
++ 
++   unsigned getUncoveredArg() const {
++     assert(hasUncoveredArg() && "no uncovered argument");
++     return FirstUncoveredArg;
++   }
++ 
++   void setAllCovered() {
++     // A string has been found with all arguments covered, so clear out
++     // the diagnostics.
++     DiagnosticExprs.clear();
++     FirstUncoveredArg = AllCovered;
++   }
++ 
++   void Update(signed NewFirstUncoveredArg, const Expr *StrExpr) {
++     assert(NewFirstUncoveredArg >= 0 && "Outside range");
++ 
++     // Don't update if a previous string covers all arguments.
++     if (FirstUncoveredArg == AllCovered)
++       return;
++ 
++     // UncoveredArgHandler tracks the highest uncovered argument index
++     // and with it all the strings that match this index.
++     if (NewFirstUncoveredArg == FirstUncoveredArg)
++       DiagnosticExprs.push_back(StrExpr);
++     else if (NewFirstUncoveredArg > FirstUncoveredArg) {
++       DiagnosticExprs.clear();
++       DiagnosticExprs.push_back(StrExpr);
++       FirstUncoveredArg = NewFirstUncoveredArg;
++     }
++   }
++ 
++   void Diagnose(Sema &S, bool IsFunctionCall, const Expr *ArgExpr);
++ };
++ 
++ enum StringLiteralCheckType {
++   SLCT_NotALiteral,
++   SLCT_UncheckedLiteral,
++   SLCT_CheckedLiteral
++ };
++ 
++ } // namespace
++ 
++ static void sumOffsets(llvm::APSInt &Offset, llvm::APSInt Addend,
++                                      BinaryOperatorKind BinOpKind,
++                                      bool AddendIsRight) {
++   unsigned BitWidth = Offset.getBitWidth();
++   unsigned AddendBitWidth = Addend.getBitWidth();
++   // There might be negative interim results.
++   if (Addend.isUnsigned()) {
++     Addend = Addend.zext(++AddendBitWidth);
++     Addend.setIsSigned(true);
++   }
++   // Adjust the bit width of the APSInts.
++   if (AddendBitWidth > BitWidth) {
++     Offset = Offset.sext(AddendBitWidth);
++     BitWidth = AddendBitWidth;
++   } else if (BitWidth > AddendBitWidth) {
++     Addend = Addend.sext(BitWidth);
++   }
++ 
++   bool Ov = false;
++   llvm::APSInt ResOffset = Offset;
++   if (BinOpKind == BO_Add)
++     ResOffset = Offset.sadd_ov(Addend, Ov);
++   else {
++     assert(AddendIsRight && BinOpKind == BO_Sub &&
++            "operator must be add or sub with addend on the right");
++     ResOffset = Offset.ssub_ov(Addend, Ov);
++   }
++ 
++   // We add an offset to a pointer here so we should support an offset as big as
++   // possible.
++   if (Ov) {
++     assert(BitWidth <= std::numeric_limits<unsigned>::max() / 2 &&
++            "index (intermediate) result too big");
++     Offset = Offset.sext(2 * BitWidth);
++     sumOffsets(Offset, Addend, BinOpKind, AddendIsRight);
++     return;
++   }
++ 
++   Offset = ResOffset;
++ }
++ 
++ namespace {
++ 
++ // This is a wrapper class around StringLiteral to support offsetted string
++ // literals as format strings. It takes the offset into account when returning
++ // the string and its length or the source locations to display notes correctly.
++ class FormatStringLiteral {
++   const StringLiteral *FExpr;
++   int64_t Offset;
++ 
++  public:
++   FormatStringLiteral(const StringLiteral *fexpr, int64_t Offset = 0)
++       : FExpr(fexpr), Offset(Offset) {}
++ 
++   StringRef getString() const {
++     return FExpr->getString().drop_front(Offset);
++   }
++ 
++   unsigned getByteLength() const {
++     return FExpr->getByteLength() - getCharByteWidth() * Offset;
++   }
++ 
++   unsigned getLength() const { return FExpr->getLength() - Offset; }
++   unsigned getCharByteWidth() const { return FExpr->getCharByteWidth(); }
++ 
++   StringLiteral::StringKind getKind() const { return FExpr->getKind(); }
++ 
++   QualType getType() const { return FExpr->getType(); }
++ 
++   bool isAscii() const { return FExpr->isAscii(); }
++   bool isWide() const { return FExpr->isWide(); }
++   bool isUTF8() const { return FExpr->isUTF8(); }
++   bool isUTF16() const { return FExpr->isUTF16(); }
++   bool isUTF32() const { return FExpr->isUTF32(); }
++   bool isPascal() const { return FExpr->isPascal(); }
++ 
++   SourceLocation getLocationOfByte(
++       unsigned ByteNo, const SourceManager &SM, const LangOptions &Features,
++       const TargetInfo &Target, unsigned *StartToken = nullptr,
++       unsigned *StartTokenByteOffset = nullptr) const {
++     return FExpr->getLocationOfByte(ByteNo + Offset, SM, Features, Target,
++                                     StartToken, StartTokenByteOffset);
++   }
++ 
++   SourceLocation getBeginLoc() const LLVM_READONLY {
++     return FExpr->getBeginLoc().getLocWithOffset(Offset);
++   }
++ 
++   SourceLocation getEndLoc() const LLVM_READONLY { return FExpr->getEndLoc(); }
++ };
++ 
++ }  // namespace
++ 
++ static void CheckFormatString(Sema &S, const FormatStringLiteral *FExpr,
++                               const Expr *OrigFormatExpr,
++                               ArrayRef<const Expr *> Args,
++                               bool HasVAListArg, unsigned format_idx,
++                               unsigned firstDataArg,
++                               Sema::FormatStringType Type,
++                               bool inFunctionCall,
++                               Sema::VariadicCallType CallType,
++                               llvm::SmallBitVector &CheckedVarArgs,
++                               UncoveredArgHandler &UncoveredArg,
++                               bool IgnoreStringsWithoutSpecifiers);
++ 
++ // Determine if an expression is a string literal or constant string.
++ // If this function returns false on the arguments to a function expecting a
++ // format string, we will usually need to emit a warning.
++ // True string literals are then checked by CheckFormatString.
++ static StringLiteralCheckType
++ checkFormatStringExpr(Sema &S, const Expr *E, ArrayRef<const Expr *> Args,
++                       bool HasVAListArg, unsigned format_idx,
++                       unsigned firstDataArg, Sema::FormatStringType Type,
++                       Sema::VariadicCallType CallType, bool InFunctionCall,
++                       llvm::SmallBitVector &CheckedVarArgs,
++                       UncoveredArgHandler &UncoveredArg,
++                       llvm::APSInt Offset,
++                       bool IgnoreStringsWithoutSpecifiers = false) {
++   if (S.isConstantEvaluated())
++     return SLCT_NotALiteral;
++  tryAgain:
++   assert(Offset.isSigned() && "invalid offset");
++ 
++   if (E->isTypeDependent() || E->isValueDependent())
++     return SLCT_NotALiteral;
++ 
++   E = E->IgnoreParenCasts();
++ 
++   if (E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull))
++     // Technically -Wformat-nonliteral does not warn about this case.
++     // The behavior of printf and friends in this case is implementation
++     // dependent.  Ideally if the format string cannot be null then
++     // it should have a 'nonnull' attribute in the function prototype.
++     return SLCT_UncheckedLiteral;
++ 
++   switch (E->getStmtClass()) {
++   case Stmt::BinaryConditionalOperatorClass:
++   case Stmt::ConditionalOperatorClass: {
++     // The expression is a literal if both sub-expressions were, and it was
++     // completely checked only if both sub-expressions were checked.
++     const AbstractConditionalOperator *C =
++         cast<AbstractConditionalOperator>(E);
++ 
++     // Determine whether it is necessary to check both sub-expressions, for
++     // example, because the condition expression is a constant that can be
++     // evaluated at compile time.
++     bool CheckLeft = true, CheckRight = true;
++ 
++     bool Cond;
++     if (C->getCond()->EvaluateAsBooleanCondition(Cond, S.getASTContext(),
++                                                  S.isConstantEvaluated())) {
++       if (Cond)
++         CheckRight = false;
++       else
++         CheckLeft = false;
++     }
++ 
++     // We need to maintain the offsets for the right and the left hand side
++     // separately to check if every possible indexed expression is a valid
++     // string literal. They might have different offsets for different string
++     // literals in the end.
++     StringLiteralCheckType Left;
++     if (!CheckLeft)
++       Left = SLCT_UncheckedLiteral;
++     else {
++       Left = checkFormatStringExpr(S, C->getTrueExpr(), Args,
++                                    HasVAListArg, format_idx, firstDataArg,
++                                    Type, CallType, InFunctionCall,
++                                    CheckedVarArgs, UncoveredArg, Offset,
++                                    IgnoreStringsWithoutSpecifiers);
++       if (Left == SLCT_NotALiteral || !CheckRight) {
++         return Left;
++       }
++     }
++ 
++     StringLiteralCheckType Right = checkFormatStringExpr(
++         S, C->getFalseExpr(), Args, HasVAListArg, format_idx, firstDataArg,
++         Type, CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset,
++         IgnoreStringsWithoutSpecifiers);
++ 
++     return (CheckLeft && Left < Right) ? Left : Right;
++   }
++ 
++   case Stmt::ImplicitCastExprClass:
++     E = cast<ImplicitCastExpr>(E)->getSubExpr();
++     goto tryAgain;
++ 
++   case Stmt::OpaqueValueExprClass:
++     if (const Expr *src = cast<OpaqueValueExpr>(E)->getSourceExpr()) {
++       E = src;
++       goto tryAgain;
++     }
++     return SLCT_NotALiteral;
++ 
++   case Stmt::PredefinedExprClass:
++     // While __func__, etc., are technically not string literals, they
++     // cannot contain format specifiers and thus are not a security
++     // liability.
++     return SLCT_UncheckedLiteral;
++ 
++   case Stmt::DeclRefExprClass: {
++     const DeclRefExpr *DR = cast<DeclRefExpr>(E);
++ 
++     // As an exception, do not flag errors for variables binding to
++     // const string literals.
++     if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) {
++       bool isConstant = false;
++       QualType T = DR->getType();
++ 
++       if (const ArrayType *AT = S.Context.getAsArrayType(T)) {
++         isConstant = AT->getElementType().isConstant(S.Context);
++       } else if (const PointerType *PT = T->getAs<PointerType>()) {
++         isConstant = T.isConstant(S.Context) &&
++                      PT->getPointeeType().isConstant(S.Context);
++       } else if (T->isObjCObjectPointerType()) {
++         // In ObjC, there is usually no "const ObjectPointer" type,
++         // so don't check if the pointee type is constant.
++         isConstant = T.isConstant(S.Context);
++       }
++ 
++       if (isConstant) {
++         if (const Expr *Init = VD->getAnyInitializer()) {
++           // Look through initializers like const char c[] = { "foo" }
++           if (const InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) {
++             if (InitList->isStringLiteralInit())
++               Init = InitList->getInit(0)->IgnoreParenImpCasts();
++           }
++           return checkFormatStringExpr(S, Init, Args,
++                                        HasVAListArg, format_idx,
++                                        firstDataArg, Type, CallType,
++                                        /*InFunctionCall*/ false, CheckedVarArgs,
++                                        UncoveredArg, Offset);
++         }
++       }
++ 
++       // For vprintf* functions (i.e., HasVAListArg==true), we add a
++       // special check to see if the format string is a function parameter
++       // of the function calling the printf function.  If the function
++       // has an attribute indicating it is a printf-like function, then we
++       // should suppress warnings concerning non-literals being used in a call
++       // to a vprintf function.  For example:
++       //
++       // void
++       // logmessage(char const *fmt __attribute__ (format (printf, 1, 2)), ...){
++       //      va_list ap;
++       //      va_start(ap, fmt);
++       //      vprintf(fmt, ap);  // Do NOT emit a warning about "fmt".
++       //      ...
++       // }
++       if (HasVAListArg) {
++         if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(VD)) {
++           if (const NamedDecl *ND = dyn_cast<NamedDecl>(PV->getDeclContext())) {
++             int PVIndex = PV->getFunctionScopeIndex() + 1;
++             for (const auto *PVFormat : ND->specific_attrs<FormatAttr>()) {
++               // adjust for implicit parameter
++               if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND))
++                 if (MD->isInstance())
++                   ++PVIndex;
++               // We also check if the formats are compatible.
++               // We can't pass a 'scanf' string to a 'printf' function.
++               if (PVIndex == PVFormat->getFormatIdx() &&
++                   Type == S.GetFormatStringType(PVFormat))
++                 return SLCT_UncheckedLiteral;
++             }
++           }
++         }
++       }
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++ 
++   case Stmt::CallExprClass:
++   case Stmt::CXXMemberCallExprClass: {
++     const CallExpr *CE = cast<CallExpr>(E);
++     if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(CE->getCalleeDecl())) {
++       bool IsFirst = true;
++       StringLiteralCheckType CommonResult;
++       for (const auto *FA : ND->specific_attrs<FormatArgAttr>()) {
++         const Expr *Arg = CE->getArg(FA->getFormatIdx().getASTIndex());
++         StringLiteralCheckType Result = checkFormatStringExpr(
++             S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type,
++             CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset,
++             IgnoreStringsWithoutSpecifiers);
++         if (IsFirst) {
++           CommonResult = Result;
++           IsFirst = false;
++         }
++       }
++       if (!IsFirst)
++         return CommonResult;
++ 
++       if (const auto *FD = dyn_cast<FunctionDecl>(ND)) {
++         unsigned BuiltinID = FD->getBuiltinID();
++         if (BuiltinID == Builtin::BI__builtin___CFStringMakeConstantString ||
++             BuiltinID == Builtin::BI__builtin___NSStringMakeConstantString) {
++           const Expr *Arg = CE->getArg(0);
++           return checkFormatStringExpr(S, Arg, Args,
++                                        HasVAListArg, format_idx,
++                                        firstDataArg, Type, CallType,
++                                        InFunctionCall, CheckedVarArgs,
++                                        UncoveredArg, Offset,
++                                        IgnoreStringsWithoutSpecifiers);
++         }
++       }
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++   case Stmt::ObjCMessageExprClass: {
++     const auto *ME = cast<ObjCMessageExpr>(E);
++     if (const auto *MD = ME->getMethodDecl()) {
++       if (const auto *FA = MD->getAttr<FormatArgAttr>()) {
++         // As a special case heuristic, if we're using the method -[NSBundle
++         // localizedStringForKey:value:table:], ignore any key strings that lack
++         // format specifiers. The idea is that if the key doesn't have any
++         // format specifiers then its probably just a key to map to the
++         // localized strings. If it does have format specifiers though, then its
++         // likely that the text of the key is the format string in the
++         // programmer's language, and should be checked.
++         const ObjCInterfaceDecl *IFace;
++         if (MD->isInstanceMethod() && (IFace = MD->getClassInterface()) &&
++             IFace->getIdentifier()->isStr("NSBundle") &&
++             MD->getSelector().isKeywordSelector(
++                 {"localizedStringForKey", "value", "table"})) {
++           IgnoreStringsWithoutSpecifiers = true;
++         }
++ 
++         const Expr *Arg = ME->getArg(FA->getFormatIdx().getASTIndex());
++         return checkFormatStringExpr(
++             S, Arg, Args, HasVAListArg, format_idx, firstDataArg, Type,
++             CallType, InFunctionCall, CheckedVarArgs, UncoveredArg, Offset,
++             IgnoreStringsWithoutSpecifiers);
++       }
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++   case Stmt::ObjCStringLiteralClass:
++   case Stmt::StringLiteralClass: {
++     const StringLiteral *StrE = nullptr;
++ 
++     if (const ObjCStringLiteral *ObjCFExpr = dyn_cast<ObjCStringLiteral>(E))
++       StrE = ObjCFExpr->getString();
++     else
++       StrE = cast<StringLiteral>(E);
++ 
++     if (StrE) {
++       if (Offset.isNegative() || Offset > StrE->getLength()) {
++         // TODO: It would be better to have an explicit warning for out of
++         // bounds literals.
++         return SLCT_NotALiteral;
++       }
++       FormatStringLiteral FStr(StrE, Offset.sextOrTrunc(64).getSExtValue());
++       CheckFormatString(S, &FStr, E, Args, HasVAListArg, format_idx,
++                         firstDataArg, Type, InFunctionCall, CallType,
++                         CheckedVarArgs, UncoveredArg,
++                         IgnoreStringsWithoutSpecifiers);
++       return SLCT_CheckedLiteral;
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++   case Stmt::BinaryOperatorClass: {
++     const BinaryOperator *BinOp = cast<BinaryOperator>(E);
++ 
++     // A string literal + an int offset is still a string literal.
++     if (BinOp->isAdditiveOp()) {
++       Expr::EvalResult LResult, RResult;
++ 
++       bool LIsInt = BinOp->getLHS()->EvaluateAsInt(
++           LResult, S.Context, Expr::SE_NoSideEffects, S.isConstantEvaluated());
++       bool RIsInt = BinOp->getRHS()->EvaluateAsInt(
++           RResult, S.Context, Expr::SE_NoSideEffects, S.isConstantEvaluated());
++ 
++       if (LIsInt != RIsInt) {
++         BinaryOperatorKind BinOpKind = BinOp->getOpcode();
++ 
++         if (LIsInt) {
++           if (BinOpKind == BO_Add) {
++             sumOffsets(Offset, LResult.Val.getInt(), BinOpKind, RIsInt);
++             E = BinOp->getRHS();
++             goto tryAgain;
++           }
++         } else {
++           sumOffsets(Offset, RResult.Val.getInt(), BinOpKind, RIsInt);
++           E = BinOp->getLHS();
++           goto tryAgain;
++         }
++       }
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++   case Stmt::UnaryOperatorClass: {
++     const UnaryOperator *UnaOp = cast<UnaryOperator>(E);
++     auto ASE = dyn_cast<ArraySubscriptExpr>(UnaOp->getSubExpr());
++     if (UnaOp->getOpcode() == UO_AddrOf && ASE) {
++       Expr::EvalResult IndexResult;
++       if (ASE->getRHS()->EvaluateAsInt(IndexResult, S.Context,
++                                        Expr::SE_NoSideEffects,
++                                        S.isConstantEvaluated())) {
++         sumOffsets(Offset, IndexResult.Val.getInt(), BO_Add,
++                    /*RHS is int*/ true);
++         E = ASE->getBase();
++         goto tryAgain;
++       }
++     }
++ 
++     return SLCT_NotALiteral;
++   }
++ 
++   default:
++     return SLCT_NotALiteral;
++   }
++ }
++ 
++ Sema::FormatStringType Sema::GetFormatStringType(const FormatAttr *Format) {
++   return llvm::StringSwitch<FormatStringType>(Format->getType()->getName())
++       .Case("scanf", FST_Scanf)
++       .Cases("printf", "printf0", FST_Printf)
++       .Cases("NSString", "CFString", FST_NSString)
++       .Case("strftime", FST_Strftime)
++       .Case("strfmon", FST_Strfmon)
++       .Cases("kprintf", "cmn_err", "vcmn_err", "zcmn_err", FST_Kprintf)
++       .Case("freebsd_kprintf", FST_FreeBSDKPrintf)
++       .Case("os_trace", FST_OSLog)
++       .Case("os_log", FST_OSLog)
++       .Default(FST_Unknown);
++ }
++ 
++ /// CheckFormatArguments - Check calls to printf and scanf (and similar
++ /// functions) for correct use of format strings.
++ /// Returns true if a format string has been fully checked.
++ bool Sema::CheckFormatArguments(const FormatAttr *Format,
++                                 ArrayRef<const Expr *> Args,
++                                 bool IsCXXMember,
++                                 VariadicCallType CallType,
++                                 SourceLocation Loc, SourceRange Range,
++                                 llvm::SmallBitVector &CheckedVarArgs) {
++   FormatStringInfo FSI;
++   if (getFormatStringInfo(Format, IsCXXMember, &FSI))
++     return CheckFormatArguments(Args, FSI.HasVAListArg, FSI.FormatIdx,
++                                 FSI.FirstDataArg, GetFormatStringType(Format),
++                                 CallType, Loc, Range, CheckedVarArgs);
++   return false;
++ }
++ 
++ bool Sema::CheckFormatArguments(ArrayRef<const Expr *> Args,
++                                 bool HasVAListArg, unsigned format_idx,
++                                 unsigned firstDataArg, FormatStringType Type,
++                                 VariadicCallType CallType,
++                                 SourceLocation Loc, SourceRange Range,
++                                 llvm::SmallBitVector &CheckedVarArgs) {
++   // CHECK: printf/scanf-like function is called with no format string.
++   if (format_idx >= Args.size()) {
++     Diag(Loc, diag::warn_missing_format_string) << Range;
++     return false;
++   }
++ 
++   const Expr *OrigFormatExpr = Args[format_idx]->IgnoreParenCasts();
++ 
++   // CHECK: format string is not a string literal.
++   //
++   // Dynamically generated format strings are difficult to
++   // automatically vet at compile time.  Requiring that format strings
++   // are string literals: (1) permits the checking of format strings by
++   // the compiler and thereby (2) can practically remove the source of
++   // many format string exploits.
++ 
++   // Format string can be either ObjC string (e.g. @"%d") or
++   // C string (e.g. "%d")
++   // ObjC string uses the same format specifiers as C string, so we can use
++   // the same format string checking logic for both ObjC and C strings.
++   UncoveredArgHandler UncoveredArg;
++   StringLiteralCheckType CT =
++       checkFormatStringExpr(*this, OrigFormatExpr, Args, HasVAListArg,
++                             format_idx, firstDataArg, Type, CallType,
++                             /*IsFunctionCall*/ true, CheckedVarArgs,
++                             UncoveredArg,
++                             /*no string offset*/ llvm::APSInt(64, false) = 0);
++ 
++   // Generate a diagnostic where an uncovered argument is detected.
++   if (UncoveredArg.hasUncoveredArg()) {
++     unsigned ArgIdx = UncoveredArg.getUncoveredArg() + firstDataArg;
++     assert(ArgIdx < Args.size() && "ArgIdx outside bounds");
++     UncoveredArg.Diagnose(*this, /*IsFunctionCall*/true, Args[ArgIdx]);
++   }
++ 
++   if (CT != SLCT_NotALiteral)
++     // Literal format string found, check done!
++     return CT == SLCT_CheckedLiteral;
++ 
++   // Strftime is particular as it always uses a single 'time' argument,
++   // so it is safe to pass a non-literal string.
++   if (Type == FST_Strftime)
++     return false;
++ 
++   // Do not emit diag when the string param is a macro expansion and the
++   // format is either NSString or CFString. This is a hack to prevent
++   // diag when using the NSLocalizedString and CFCopyLocalizedString macros
++   // which are usually used in place of NS and CF string literals.
++   SourceLocation FormatLoc = Args[format_idx]->getBeginLoc();
++   if (Type == FST_NSString && SourceMgr.isInSystemMacro(FormatLoc))
++     return false;
++ 
++   // If there are no arguments specified, warn with -Wformat-security, otherwise
++   // warn only with -Wformat-nonliteral.
++   if (Args.size() == firstDataArg) {
++     Diag(FormatLoc, diag::warn_format_nonliteral_noargs)
++       << OrigFormatExpr->getSourceRange();
++     switch (Type) {
++     default:
++       break;
++     case FST_Kprintf:
++     case FST_FreeBSDKPrintf:
++     case FST_Printf:
++       Diag(FormatLoc, diag::note_format_security_fixit)
++         << FixItHint::CreateInsertion(FormatLoc, "\"%s\", ");
++       break;
++     case FST_NSString:
++       Diag(FormatLoc, diag::note_format_security_fixit)
++         << FixItHint::CreateInsertion(FormatLoc, "@\"%@\", ");
++       break;
++     }
++   } else {
++     Diag(FormatLoc, diag::warn_format_nonliteral)
++       << OrigFormatExpr->getSourceRange();
++   }
++   return false;
++ }
++ 
++ namespace {
++ 
++ class CheckFormatHandler : public analyze_format_string::FormatStringHandler {
++ protected:
++   Sema &S;
++   const FormatStringLiteral *FExpr;
++   const Expr *OrigFormatExpr;
++   const Sema::FormatStringType FSType;
++   const unsigned FirstDataArg;
++   const unsigned NumDataArgs;
++   const char *Beg; // Start of format string.
++   const bool HasVAListArg;
++   ArrayRef<const Expr *> Args;
++   unsigned FormatIdx;
++   llvm::SmallBitVector CoveredArgs;
++   bool usesPositionalArgs = false;
++   bool atFirstArg = true;
++   bool inFunctionCall;
++   Sema::VariadicCallType CallType;
++   llvm::SmallBitVector &CheckedVarArgs;
++   UncoveredArgHandler &UncoveredArg;
++ 
++ public:
++   CheckFormatHandler(Sema &s, const FormatStringLiteral *fexpr,
++                      const Expr *origFormatExpr,
++                      const Sema::FormatStringType type, unsigned firstDataArg,
++                      unsigned numDataArgs, const char *beg, bool hasVAListArg,
++                      ArrayRef<const Expr *> Args, unsigned formatIdx,
++                      bool inFunctionCall, Sema::VariadicCallType callType,
++                      llvm::SmallBitVector &CheckedVarArgs,
++                      UncoveredArgHandler &UncoveredArg)
++       : S(s), FExpr(fexpr), OrigFormatExpr(origFormatExpr), FSType(type),
++         FirstDataArg(firstDataArg), NumDataArgs(numDataArgs), Beg(beg),
++         HasVAListArg(hasVAListArg), Args(Args), FormatIdx(formatIdx),
++         inFunctionCall(inFunctionCall), CallType(callType),
++         CheckedVarArgs(CheckedVarArgs), UncoveredArg(UncoveredArg) {
++     CoveredArgs.resize(numDataArgs);
++     CoveredArgs.reset();
++   }
++ 
++   void DoneProcessing();
++ 
++   void HandleIncompleteSpecifier(const char *startSpecifier,
++                                  unsigned specifierLen) override;
++ 
++   void HandleInvalidLengthModifier(
++                            const analyze_format_string::FormatSpecifier &FS,
++                            const analyze_format_string::ConversionSpecifier &CS,
++                            const char *startSpecifier, unsigned specifierLen,
++                            unsigned DiagID);
++ 
++   void HandleNonStandardLengthModifier(
++                     const analyze_format_string::FormatSpecifier &FS,
++                     const char *startSpecifier, unsigned specifierLen);
++ 
++   void HandleNonStandardConversionSpecifier(
++                     const analyze_format_string::ConversionSpecifier &CS,
++                     const char *startSpecifier, unsigned specifierLen);
++ 
++   void HandlePosition(const char *startPos, unsigned posLen) override;
++ 
++   void HandleInvalidPosition(const char *startSpecifier,
++                              unsigned specifierLen,
++                              analyze_format_string::PositionContext p) override;
++ 
++   void HandleZeroPosition(const char *startPos, unsigned posLen) override;
++ 
++   void HandleNullChar(const char *nullCharacter) override;
++ 
++   template <typename Range>
++   static void
++   EmitFormatDiagnostic(Sema &S, bool inFunctionCall, const Expr *ArgumentExpr,
++                        const PartialDiagnostic &PDiag, SourceLocation StringLoc,
++                        bool IsStringLocation, Range StringRange,
++                        ArrayRef<FixItHint> Fixit = None);
++ 
++ protected:
++   bool HandleInvalidConversionSpecifier(unsigned argIndex, SourceLocation Loc,
++                                         const char *startSpec,
++                                         unsigned specifierLen,
++                                         const char *csStart, unsigned csLen);
++ 
++   void HandlePositionalNonpositionalArgs(SourceLocation Loc,
++                                          const char *startSpec,
++                                          unsigned specifierLen);
++ 
++   SourceRange getFormatStringRange();
++   CharSourceRange getSpecifierRange(const char *startSpecifier,
++                                     unsigned specifierLen);
++   SourceLocation getLocationOfByte(const char *x);
++ 
++   const Expr *getDataArg(unsigned i) const;
++ 
++   bool CheckNumArgs(const analyze_format_string::FormatSpecifier &FS,
++                     const analyze_format_string::ConversionSpecifier &CS,
++                     const char *startSpecifier, unsigned specifierLen,
++                     unsigned argIndex);
++ 
++   template <typename Range>
++   void EmitFormatDiagnostic(PartialDiagnostic PDiag, SourceLocation StringLoc,
++                             bool IsStringLocation, Range StringRange,
++                             ArrayRef<FixItHint> Fixit = None);
++ };
++ 
++ } // namespace
++ 
++ SourceRange CheckFormatHandler::getFormatStringRange() {
++   return OrigFormatExpr->getSourceRange();
++ }
++ 
++ CharSourceRange CheckFormatHandler::
++ getSpecifierRange(const char *startSpecifier, unsigned specifierLen) {
++   SourceLocation Start = getLocationOfByte(startSpecifier);
++   SourceLocation End   = getLocationOfByte(startSpecifier + specifierLen - 1);
++ 
++   // Advance the end SourceLocation by one due to half-open ranges.
++   End = End.getLocWithOffset(1);
++ 
++   return CharSourceRange::getCharRange(Start, End);
++ }
++ 
++ SourceLocation CheckFormatHandler::getLocationOfByte(const char *x) {
++   return FExpr->getLocationOfByte(x - Beg, S.getSourceManager(),
++                                   S.getLangOpts(), S.Context.getTargetInfo());
++ }
++ 
++ void CheckFormatHandler::HandleIncompleteSpecifier(const char *startSpecifier,
++                                                    unsigned specifierLen){
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_incomplete_specifier),
++                        getLocationOfByte(startSpecifier),
++                        /*IsStringLocation*/true,
++                        getSpecifierRange(startSpecifier, specifierLen));
++ }
++ 
++ void CheckFormatHandler::HandleInvalidLengthModifier(
++     const analyze_format_string::FormatSpecifier &FS,
++     const analyze_format_string::ConversionSpecifier &CS,
++     const char *startSpecifier, unsigned specifierLen, unsigned DiagID) {
++   using namespace analyze_format_string;
++ 
++   const LengthModifier &LM = FS.getLengthModifier();
++   CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
++ 
++   // See if we know how to fix this length modifier.
++   Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
++   if (FixedLM) {
++     EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
++                          getLocationOfByte(LM.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen));
++ 
++     S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
++       << FixedLM->toString()
++       << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
++ 
++   } else {
++     FixItHint Hint;
++     if (DiagID == diag::warn_format_nonsensical_length)
++       Hint = FixItHint::CreateRemoval(LMRange);
++ 
++     EmitFormatDiagnostic(S.PDiag(DiagID) << LM.toString() << CS.toString(),
++                          getLocationOfByte(LM.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen),
++                          Hint);
++   }
++ }
++ 
++ void CheckFormatHandler::HandleNonStandardLengthModifier(
++     const analyze_format_string::FormatSpecifier &FS,
++     const char *startSpecifier, unsigned specifierLen) {
++   using namespace analyze_format_string;
++ 
++   const LengthModifier &LM = FS.getLengthModifier();
++   CharSourceRange LMRange = getSpecifierRange(LM.getStart(), LM.getLength());
++ 
++   // See if we know how to fix this length modifier.
++   Optional<LengthModifier> FixedLM = FS.getCorrectedLengthModifier();
++   if (FixedLM) {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
++                            << LM.toString() << 0,
++                          getLocationOfByte(LM.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen));
++ 
++     S.Diag(getLocationOfByte(LM.getStart()), diag::note_format_fix_specifier)
++       << FixedLM->toString()
++       << FixItHint::CreateReplacement(LMRange, FixedLM->toString());
++ 
++   } else {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
++                            << LM.toString() << 0,
++                          getLocationOfByte(LM.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen));
++   }
++ }
++ 
++ void CheckFormatHandler::HandleNonStandardConversionSpecifier(
++     const analyze_format_string::ConversionSpecifier &CS,
++     const char *startSpecifier, unsigned specifierLen) {
++   using namespace analyze_format_string;
++ 
++   // See if we know how to fix this conversion specifier.
++   Optional<ConversionSpecifier> FixedCS = CS.getStandardSpecifier();
++   if (FixedCS) {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
++                           << CS.toString() << /*conversion specifier*/1,
++                          getLocationOfByte(CS.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen));
++ 
++     CharSourceRange CSRange = getSpecifierRange(CS.getStart(), CS.getLength());
++     S.Diag(getLocationOfByte(CS.getStart()), diag::note_format_fix_specifier)
++       << FixedCS->toString()
++       << FixItHint::CreateReplacement(CSRange, FixedCS->toString());
++   } else {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard)
++                           << CS.toString() << /*conversion specifier*/1,
++                          getLocationOfByte(CS.getStart()),
++                          /*IsStringLocation*/true,
++                          getSpecifierRange(startSpecifier, specifierLen));
++   }
++ }
++ 
++ void CheckFormatHandler::HandlePosition(const char *startPos,
++                                         unsigned posLen) {
++   EmitFormatDiagnostic(S.PDiag(diag::warn_format_non_standard_positional_arg),
++                                getLocationOfByte(startPos),
++                                /*IsStringLocation*/true,
++                                getSpecifierRange(startPos, posLen));
++ }
++ 
++ void
++ CheckFormatHandler::HandleInvalidPosition(const char *startPos, unsigned posLen,
++                                      analyze_format_string::PositionContext p) {
++   EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_positional_specifier)
++                          << (unsigned) p,
++                        getLocationOfByte(startPos), /*IsStringLocation*/true,
++                        getSpecifierRange(startPos, posLen));
++ }
++ 
++ void CheckFormatHandler::HandleZeroPosition(const char *startPos,
++                                             unsigned posLen) {
++   EmitFormatDiagnostic(S.PDiag(diag::warn_format_zero_positional_specifier),
++                                getLocationOfByte(startPos),
++                                /*IsStringLocation*/true,
++                                getSpecifierRange(startPos, posLen));
++ }
++ 
++ void CheckFormatHandler::HandleNullChar(const char *nullCharacter) {
++   if (!isa<ObjCStringLiteral>(OrigFormatExpr)) {
++     // The presence of a null character is likely an error.
++     EmitFormatDiagnostic(
++       S.PDiag(diag::warn_printf_format_string_contains_null_char),
++       getLocationOfByte(nullCharacter), /*IsStringLocation*/true,
++       getFormatStringRange());
++   }
++ }
++ 
++ // Note that this may return NULL if there was an error parsing or building
++ // one of the argument expressions.
++ const Expr *CheckFormatHandler::getDataArg(unsigned i) const {
++   return Args[FirstDataArg + i];
++ }
++ 
++ void CheckFormatHandler::DoneProcessing() {
++   // Does the number of data arguments exceed the number of
++   // format conversions in the format string?
++   if (!HasVAListArg) {
++       // Find any arguments that weren't covered.
++     CoveredArgs.flip();
++     signed notCoveredArg = CoveredArgs.find_first();
++     if (notCoveredArg >= 0) {
++       assert((unsigned)notCoveredArg < NumDataArgs);
++       UncoveredArg.Update(notCoveredArg, OrigFormatExpr);
++     } else {
++       UncoveredArg.setAllCovered();
++     }
++   }
++ }
++ 
++ void UncoveredArgHandler::Diagnose(Sema &S, bool IsFunctionCall,
++                                    const Expr *ArgExpr) {
++   assert(hasUncoveredArg() && DiagnosticExprs.size() > 0 &&
++          "Invalid state");
++ 
++   if (!ArgExpr)
++     return;
++ 
++   SourceLocation Loc = ArgExpr->getBeginLoc();
++ 
++   if (S.getSourceManager().isInSystemMacro(Loc))
++     return;
++ 
++   PartialDiagnostic PDiag = S.PDiag(diag::warn_printf_data_arg_not_used);
++   for (auto E : DiagnosticExprs)
++     PDiag << E->getSourceRange();
++ 
++   CheckFormatHandler::EmitFormatDiagnostic(
++                                   S, IsFunctionCall, DiagnosticExprs[0],
++                                   PDiag, Loc, /*IsStringLocation*/false,
++                                   DiagnosticExprs[0]->getSourceRange());
++ }
++ 
++ bool
++ CheckFormatHandler::HandleInvalidConversionSpecifier(unsigned argIndex,
++                                                      SourceLocation Loc,
++                                                      const char *startSpec,
++                                                      unsigned specifierLen,
++                                                      const char *csStart,
++                                                      unsigned csLen) {
++   bool keepGoing = true;
++   if (argIndex < NumDataArgs) {
++     // Consider the argument coverered, even though the specifier doesn't
++     // make sense.
++     CoveredArgs.set(argIndex);
++   }
++   else {
++     // If argIndex exceeds the number of data arguments we
++     // don't issue a warning because that is just a cascade of warnings (and
++     // they may have intended '%%' anyway). We don't want to continue processing
++     // the format string after this point, however, as we will like just get
++     // gibberish when trying to match arguments.
++     keepGoing = false;
++   }
++ 
++   StringRef Specifier(csStart, csLen);
++ 
++   // If the specifier in non-printable, it could be the first byte of a UTF-8
++   // sequence. In that case, print the UTF-8 code point. If not, print the byte
++   // hex value.
++   std::string CodePointStr;
++   if (!llvm::sys::locale::isPrint(*csStart)) {
++     llvm::UTF32 CodePoint;
++     const llvm::UTF8 **B = reinterpret_cast<const llvm::UTF8 **>(&csStart);
++     const llvm::UTF8 *E =
++         reinterpret_cast<const llvm::UTF8 *>(csStart + csLen);
++     llvm::ConversionResult Result =
++         llvm::convertUTF8Sequence(B, E, &CodePoint, llvm::strictConversion);
++ 
++     if (Result != llvm::conversionOK) {
++       unsigned char FirstChar = *csStart;
++       CodePoint = (llvm::UTF32)FirstChar;
++     }
++ 
++     llvm::raw_string_ostream OS(CodePointStr);
++     if (CodePoint < 256)
++       OS << "\\x" << llvm::format("%02x", CodePoint);
++     else if (CodePoint <= 0xFFFF)
++       OS << "\\u" << llvm::format("%04x", CodePoint);
++     else
++       OS << "\\U" << llvm::format("%08x", CodePoint);
++     OS.flush();
++     Specifier = CodePointStr;
++   }
++ 
++   EmitFormatDiagnostic(
++       S.PDiag(diag::warn_format_invalid_conversion) << Specifier, Loc,
++       /*IsStringLocation*/ true, getSpecifierRange(startSpec, specifierLen));
++ 
++   return keepGoing;
++ }
++ 
++ void
++ CheckFormatHandler::HandlePositionalNonpositionalArgs(SourceLocation Loc,
++                                                       const char *startSpec,
++                                                       unsigned specifierLen) {
++   EmitFormatDiagnostic(
++     S.PDiag(diag::warn_format_mix_positional_nonpositional_args),
++     Loc, /*isStringLoc*/true, getSpecifierRange(startSpec, specifierLen));
++ }
++ 
++ bool
++ CheckFormatHandler::CheckNumArgs(
++   const analyze_format_string::FormatSpecifier &FS,
++   const analyze_format_string::ConversionSpecifier &CS,
++   const char *startSpecifier, unsigned specifierLen, unsigned argIndex) {
++ 
++   if (argIndex >= NumDataArgs) {
++     PartialDiagnostic PDiag = FS.usesPositionalArg()
++       ? (S.PDiag(diag::warn_printf_positional_arg_exceeds_data_args)
++            << (argIndex+1) << NumDataArgs)
++       : S.PDiag(diag::warn_printf_insufficient_data_args);
++     EmitFormatDiagnostic(
++       PDiag, getLocationOfByte(CS.getStart()), /*IsStringLocation*/true,
++       getSpecifierRange(startSpecifier, specifierLen));
++ 
++     // Since more arguments than conversion tokens are given, by extension
++     // all arguments are covered, so mark this as so.
++     UncoveredArg.setAllCovered();
++     return false;
++   }
++   return true;
++ }
++ 
++ template<typename Range>
++ void CheckFormatHandler::EmitFormatDiagnostic(PartialDiagnostic PDiag,
++                                               SourceLocation Loc,
++                                               bool IsStringLocation,
++                                               Range StringRange,
++                                               ArrayRef<FixItHint> FixIt) {
++   EmitFormatDiagnostic(S, inFunctionCall, Args[FormatIdx], PDiag,
++                        Loc, IsStringLocation, StringRange, FixIt);
++ }
++ 
++ /// If the format string is not within the function call, emit a note
++ /// so that the function call and string are in diagnostic messages.
++ ///
++ /// \param InFunctionCall if true, the format string is within the function
++ /// call and only one diagnostic message will be produced.  Otherwise, an
++ /// extra note will be emitted pointing to location of the format string.
++ ///
++ /// \param ArgumentExpr the expression that is passed as the format string
++ /// argument in the function call.  Used for getting locations when two
++ /// diagnostics are emitted.
++ ///
++ /// \param PDiag the callee should already have provided any strings for the
++ /// diagnostic message.  This function only adds locations and fixits
++ /// to diagnostics.
++ ///
++ /// \param Loc primary location for diagnostic.  If two diagnostics are
++ /// required, one will be at Loc and a new SourceLocation will be created for
++ /// the other one.
++ ///
++ /// \param IsStringLocation if true, Loc points to the format string should be
++ /// used for the note.  Otherwise, Loc points to the argument list and will
++ /// be used with PDiag.
++ ///
++ /// \param StringRange some or all of the string to highlight.  This is
++ /// templated so it can accept either a CharSourceRange or a SourceRange.
++ ///
++ /// \param FixIt optional fix it hint for the format string.
++ template <typename Range>
++ void CheckFormatHandler::EmitFormatDiagnostic(
++     Sema &S, bool InFunctionCall, const Expr *ArgumentExpr,
++     const PartialDiagnostic &PDiag, SourceLocation Loc, bool IsStringLocation,
++     Range StringRange, ArrayRef<FixItHint> FixIt) {
++   if (InFunctionCall) {
++     const Sema::SemaDiagnosticBuilder &D = S.Diag(Loc, PDiag);
++     D << StringRange;
++     D << FixIt;
++   } else {
++     S.Diag(IsStringLocation ? ArgumentExpr->getExprLoc() : Loc, PDiag)
++       << ArgumentExpr->getSourceRange();
++ 
++     const Sema::SemaDiagnosticBuilder &Note =
++       S.Diag(IsStringLocation ? Loc : StringRange.getBegin(),
++              diag::note_format_string_defined);
++ 
++     Note << StringRange;
++     Note << FixIt;
++   }
++ }
++ 
++ //===--- CHECK: Printf format string checking ------------------------------===//
++ 
++ namespace {
++ 
++ class CheckPrintfHandler : public CheckFormatHandler {
++ public:
++   CheckPrintfHandler(Sema &s, const FormatStringLiteral *fexpr,
++                      const Expr *origFormatExpr,
++                      const Sema::FormatStringType type, unsigned firstDataArg,
++                      unsigned numDataArgs, bool isObjC, const char *beg,
++                      bool hasVAListArg, ArrayRef<const Expr *> Args,
++                      unsigned formatIdx, bool inFunctionCall,
++                      Sema::VariadicCallType CallType,
++                      llvm::SmallBitVector &CheckedVarArgs,
++                      UncoveredArgHandler &UncoveredArg)
++       : CheckFormatHandler(s, fexpr, origFormatExpr, type, firstDataArg,
++                            numDataArgs, beg, hasVAListArg, Args, formatIdx,
++                            inFunctionCall, CallType, CheckedVarArgs,
++                            UncoveredArg) {}
++ 
++   bool isObjCContext() const { return FSType == Sema::FST_NSString; }
++ 
++   /// Returns true if '%@' specifiers are allowed in the format string.
++   bool allowsObjCArg() const {
++     return FSType == Sema::FST_NSString || FSType == Sema::FST_OSLog ||
++            FSType == Sema::FST_OSTrace;
++   }
++ 
++   bool HandleInvalidPrintfConversionSpecifier(
++                                       const analyze_printf::PrintfSpecifier &FS,
++                                       const char *startSpecifier,
++                                       unsigned specifierLen) override;
++ 
++   void handleInvalidMaskType(StringRef MaskType) override;
++ 
++   bool HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier &FS,
++                              const char *startSpecifier,
++                              unsigned specifierLen) override;
++   bool checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
++                        const char *StartSpecifier,
++                        unsigned SpecifierLen,
++                        const Expr *E);
++ 
++   bool HandleAmount(const analyze_format_string::OptionalAmount &Amt, unsigned k,
++                     const char *startSpecifier, unsigned specifierLen);
++   void HandleInvalidAmount(const analyze_printf::PrintfSpecifier &FS,
++                            const analyze_printf::OptionalAmount &Amt,
++                            unsigned type,
++                            const char *startSpecifier, unsigned specifierLen);
++   void HandleFlag(const analyze_printf::PrintfSpecifier &FS,
++                   const analyze_printf::OptionalFlag &flag,
++                   const char *startSpecifier, unsigned specifierLen);
++   void HandleIgnoredFlag(const analyze_printf::PrintfSpecifier &FS,
++                          const analyze_printf::OptionalFlag &ignoredFlag,
++                          const analyze_printf::OptionalFlag &flag,
++                          const char *startSpecifier, unsigned specifierLen);
++   bool checkForCStrMembers(const analyze_printf::ArgType &AT,
++                            const Expr *E);
++ 
++   void HandleEmptyObjCModifierFlag(const char *startFlag,
++                                    unsigned flagLen) override;
++ 
++   void HandleInvalidObjCModifierFlag(const char *startFlag,
++                                             unsigned flagLen) override;
++ 
++   void HandleObjCFlagsWithNonObjCConversion(const char *flagsStart,
++                                            const char *flagsEnd,
++                                            const char *conversionPosition)
++                                              override;
++ };
++ 
++ } // namespace
++ 
++ bool CheckPrintfHandler::HandleInvalidPrintfConversionSpecifier(
++                                       const analyze_printf::PrintfSpecifier &FS,
++                                       const char *startSpecifier,
++                                       unsigned specifierLen) {
++   const analyze_printf::PrintfConversionSpecifier &CS =
++     FS.getConversionSpecifier();
++ 
++   return HandleInvalidConversionSpecifier(FS.getArgIndex(),
++                                           getLocationOfByte(CS.getStart()),
++                                           startSpecifier, specifierLen,
++                                           CS.getStart(), CS.getLength());
++ }
++ 
++ void CheckPrintfHandler::handleInvalidMaskType(StringRef MaskType) {
++   S.Diag(getLocationOfByte(MaskType.data()), diag::err_invalid_mask_type_size);
++ }
++ 
++ bool CheckPrintfHandler::HandleAmount(
++                                const analyze_format_string::OptionalAmount &Amt,
++                                unsigned k, const char *startSpecifier,
++                                unsigned specifierLen) {
++   if (Amt.hasDataArgument()) {
++     if (!HasVAListArg) {
++       unsigned argIndex = Amt.getArgIndex();
++       if (argIndex >= NumDataArgs) {
++         EmitFormatDiagnostic(S.PDiag(diag::warn_printf_asterisk_missing_arg)
++                                << k,
++                              getLocationOfByte(Amt.getStart()),
++                              /*IsStringLocation*/true,
++                              getSpecifierRange(startSpecifier, specifierLen));
++         // Don't do any more checking.  We will just emit
++         // spurious errors.
++         return false;
++       }
++ 
++       // Type check the data argument.  It should be an 'int'.
++       // Although not in conformance with C99, we also allow the argument to be
++       // an 'unsigned int' as that is a reasonably safe case.  GCC also
++       // doesn't emit a warning for that case.
++       CoveredArgs.set(argIndex);
++       const Expr *Arg = getDataArg(argIndex);
++       if (!Arg)
++         return false;
++ 
++       QualType T = Arg->getType();
++ 
++       const analyze_printf::ArgType &AT = Amt.getArgType(S.Context);
++       assert(AT.isValid());
++ 
++       if (!AT.matchesType(S.Context, T)) {
++         EmitFormatDiagnostic(S.PDiag(diag::warn_printf_asterisk_wrong_type)
++                                << k << AT.getRepresentativeTypeName(S.Context)
++                                << T << Arg->getSourceRange(),
++                              getLocationOfByte(Amt.getStart()),
++                              /*IsStringLocation*/true,
++                              getSpecifierRange(startSpecifier, specifierLen));
++         // Don't do any more checking.  We will just emit
++         // spurious errors.
++         return false;
++       }
++     }
++   }
++   return true;
++ }
++ 
++ void CheckPrintfHandler::HandleInvalidAmount(
++                                       const analyze_printf::PrintfSpecifier &FS,
++                                       const analyze_printf::OptionalAmount &Amt,
++                                       unsigned type,
++                                       const char *startSpecifier,
++                                       unsigned specifierLen) {
++   const analyze_printf::PrintfConversionSpecifier &CS =
++     FS.getConversionSpecifier();
++ 
++   FixItHint fixit =
++     Amt.getHowSpecified() == analyze_printf::OptionalAmount::Constant
++       ? FixItHint::CreateRemoval(getSpecifierRange(Amt.getStart(),
++                                  Amt.getConstantLength()))
++       : FixItHint();
++ 
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_nonsensical_optional_amount)
++                          << type << CS.toString(),
++                        getLocationOfByte(Amt.getStart()),
++                        /*IsStringLocation*/true,
++                        getSpecifierRange(startSpecifier, specifierLen),
++                        fixit);
++ }
++ 
++ void CheckPrintfHandler::HandleFlag(const analyze_printf::PrintfSpecifier &FS,
++                                     const analyze_printf::OptionalFlag &flag,
++                                     const char *startSpecifier,
++                                     unsigned specifierLen) {
++   // Warn about pointless flag with a fixit removal.
++   const analyze_printf::PrintfConversionSpecifier &CS =
++     FS.getConversionSpecifier();
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_nonsensical_flag)
++                          << flag.toString() << CS.toString(),
++                        getLocationOfByte(flag.getPosition()),
++                        /*IsStringLocation*/true,
++                        getSpecifierRange(startSpecifier, specifierLen),
++                        FixItHint::CreateRemoval(
++                          getSpecifierRange(flag.getPosition(), 1)));
++ }
++ 
++ void CheckPrintfHandler::HandleIgnoredFlag(
++                                 const analyze_printf::PrintfSpecifier &FS,
++                                 const analyze_printf::OptionalFlag &ignoredFlag,
++                                 const analyze_printf::OptionalFlag &flag,
++                                 const char *startSpecifier,
++                                 unsigned specifierLen) {
++   // Warn about ignored flag with a fixit removal.
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_ignored_flag)
++                          << ignoredFlag.toString() << flag.toString(),
++                        getLocationOfByte(ignoredFlag.getPosition()),
++                        /*IsStringLocation*/true,
++                        getSpecifierRange(startSpecifier, specifierLen),
++                        FixItHint::CreateRemoval(
++                          getSpecifierRange(ignoredFlag.getPosition(), 1)));
++ }
++ 
++ void CheckPrintfHandler::HandleEmptyObjCModifierFlag(const char *startFlag,
++                                                      unsigned flagLen) {
++   // Warn about an empty flag.
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_empty_objc_flag),
++                        getLocationOfByte(startFlag),
++                        /*IsStringLocation*/true,
++                        getSpecifierRange(startFlag, flagLen));
++ }
++ 
++ void CheckPrintfHandler::HandleInvalidObjCModifierFlag(const char *startFlag,
++                                                        unsigned flagLen) {
++   // Warn about an invalid flag.
++   auto Range = getSpecifierRange(startFlag, flagLen);
++   StringRef flag(startFlag, flagLen);
++   EmitFormatDiagnostic(S.PDiag(diag::warn_printf_invalid_objc_flag) << flag,
++                       getLocationOfByte(startFlag),
++                       /*IsStringLocation*/true,
++                       Range, FixItHint::CreateRemoval(Range));
++ }
++ 
++ void CheckPrintfHandler::HandleObjCFlagsWithNonObjCConversion(
++     const char *flagsStart, const char *flagsEnd, const char *conversionPosition) {
++     // Warn about using '[...]' without a '@' conversion.
++     auto Range = getSpecifierRange(flagsStart, flagsEnd - flagsStart + 1);
++     auto diag = diag::warn_printf_ObjCflags_without_ObjCConversion;
++     EmitFormatDiagnostic(S.PDiag(diag) << StringRef(conversionPosition, 1),
++                          getLocationOfByte(conversionPosition),
++                          /*IsStringLocation*/true,
++                          Range, FixItHint::CreateRemoval(Range));
++ }
++ 
++ // Determines if the specified is a C++ class or struct containing
++ // a member with the specified name and kind (e.g. a CXXMethodDecl named
++ // "c_str()").
++ template<typename MemberKind>
++ static llvm::SmallPtrSet<MemberKind*, 1>
++ CXXRecordMembersNamed(StringRef Name, Sema &S, QualType Ty) {
++   const RecordType *RT = Ty->getAs<RecordType>();
++   llvm::SmallPtrSet<MemberKind*, 1> Results;
++ 
++   if (!RT)
++     return Results;
++   const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
++   if (!RD || !RD->getDefinition())
++     return Results;
++ 
++   LookupResult R(S, &S.Context.Idents.get(Name), SourceLocation(),
++                  Sema::LookupMemberName);
++   R.suppressDiagnostics();
++ 
++   // We just need to include all members of the right kind turned up by the
++   // filter, at this point.
++   if (S.LookupQualifiedName(R, RT->getDecl()))
++     for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) {
++       NamedDecl *decl = (*I)->getUnderlyingDecl();
++       if (MemberKind *FK = dyn_cast<MemberKind>(decl))
++         Results.insert(FK);
++     }
++   return Results;
++ }
++ 
++ /// Check if we could call '.c_str()' on an object.
++ ///
++ /// FIXME: This returns the wrong results in some cases (if cv-qualifiers don't
++ /// allow the call, or if it would be ambiguous).
++ bool Sema::hasCStrMethod(const Expr *E) {
++   using MethodSet = llvm::SmallPtrSet<CXXMethodDecl *, 1>;
++ 
++   MethodSet Results =
++       CXXRecordMembersNamed<CXXMethodDecl>("c_str", *this, E->getType());
++   for (MethodSet::iterator MI = Results.begin(), ME = Results.end();
++        MI != ME; ++MI)
++     if ((*MI)->getMinRequiredArguments() == 0)
++       return true;
++   return false;
++ }
++ 
++ // Check if a (w)string was passed when a (w)char* was needed, and offer a
++ // better diagnostic if so. AT is assumed to be valid.
++ // Returns true when a c_str() conversion method is found.
++ bool CheckPrintfHandler::checkForCStrMembers(
++     const analyze_printf::ArgType &AT, const Expr *E) {
++   using MethodSet = llvm::SmallPtrSet<CXXMethodDecl *, 1>;
++ 
++   MethodSet Results =
++       CXXRecordMembersNamed<CXXMethodDecl>("c_str", S, E->getType());
++ 
++   for (MethodSet::iterator MI = Results.begin(), ME = Results.end();
++        MI != ME; ++MI) {
++     const CXXMethodDecl *Method = *MI;
++     if (Method->getMinRequiredArguments() == 0 &&
++         AT.matchesType(S.Context, Method->getReturnType())) {
++       // FIXME: Suggest parens if the expression needs them.
++       SourceLocation EndLoc = S.getLocForEndOfToken(E->getEndLoc());
++       S.Diag(E->getBeginLoc(), diag::note_printf_c_str)
++           << "c_str()" << FixItHint::CreateInsertion(EndLoc, ".c_str()");
++       return true;
++     }
++   }
++ 
++   return false;
++ }
++ 
++ bool
++ CheckPrintfHandler::HandlePrintfSpecifier(const analyze_printf::PrintfSpecifier
++                                             &FS,
++                                           const char *startSpecifier,
++                                           unsigned specifierLen) {
++   using namespace analyze_format_string;
++   using namespace analyze_printf;
++ 
++   const PrintfConversionSpecifier &CS = FS.getConversionSpecifier();
++ 
++   if (FS.consumesDataArgument()) {
++     if (atFirstArg) {
++         atFirstArg = false;
++         usesPositionalArgs = FS.usesPositionalArg();
++     }
++     else if (usesPositionalArgs != FS.usesPositionalArg()) {
++       HandlePositionalNonpositionalArgs(getLocationOfByte(CS.getStart()),
++                                         startSpecifier, specifierLen);
++       return false;
++     }
++   }
++ 
++   // First check if the field width, precision, and conversion specifier
++   // have matching data arguments.
++   if (!HandleAmount(FS.getFieldWidth(), /* field width */ 0,
++                     startSpecifier, specifierLen)) {
++     return false;
++   }
++ 
++   if (!HandleAmount(FS.getPrecision(), /* precision */ 1,
++                     startSpecifier, specifierLen)) {
++     return false;
++   }
++ 
++   if (!CS.consumesDataArgument()) {
++     // FIXME: Technically specifying a precision or field width here
++     // makes no sense.  Worth issuing a warning at some point.
++     return true;
++   }
++ 
++   // Consume the argument.
++   unsigned argIndex = FS.getArgIndex();
++   if (argIndex < NumDataArgs) {
++     // The check to see if the argIndex is valid will come later.
++     // We set the bit here because we may exit early from this
++     // function if we encounter some other error.
++     CoveredArgs.set(argIndex);
++   }
++ 
++   // FreeBSD kernel extensions.
++   if (CS.getKind() == ConversionSpecifier::FreeBSDbArg ||
++       CS.getKind() == ConversionSpecifier::FreeBSDDArg) {
++     // We need at least two arguments.
++     if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex + 1))
++       return false;
++ 
++     // Claim the second argument.
++     CoveredArgs.set(argIndex + 1);
++ 
++     // Type check the first argument (int for %b, pointer for %D)
++     const Expr *Ex = getDataArg(argIndex);
++     const analyze_printf::ArgType &AT =
++       (CS.getKind() == ConversionSpecifier::FreeBSDbArg) ?
++         ArgType(S.Context.IntTy) : ArgType::CPointerTy;
++     if (AT.isValid() && !AT.matchesType(S.Context, Ex->getType()))
++       EmitFormatDiagnostic(
++           S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
++               << AT.getRepresentativeTypeName(S.Context) << Ex->getType()
++               << false << Ex->getSourceRange(),
++           Ex->getBeginLoc(), /*IsStringLocation*/ false,
++           getSpecifierRange(startSpecifier, specifierLen));
++ 
++     // Type check the second argument (char * for both %b and %D)
++     Ex = getDataArg(argIndex + 1);
++     const analyze_printf::ArgType &AT2 = ArgType::CStrTy;
++     if (AT2.isValid() && !AT2.matchesType(S.Context, Ex->getType()))
++       EmitFormatDiagnostic(
++           S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
++               << AT2.getRepresentativeTypeName(S.Context) << Ex->getType()
++               << false << Ex->getSourceRange(),
++           Ex->getBeginLoc(), /*IsStringLocation*/ false,
++           getSpecifierRange(startSpecifier, specifierLen));
++ 
++      return true;
++   }
++ 
++   // Check for using an Objective-C specific conversion specifier
++   // in a non-ObjC literal.
++   if (!allowsObjCArg() && CS.isObjCArg()) {
++     return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
++                                                   specifierLen);
++   }
++ 
++   // %P can only be used with os_log.
++   if (FSType != Sema::FST_OSLog && CS.getKind() == ConversionSpecifier::PArg) {
++     return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
++                                                   specifierLen);
++   }
++ 
++   // %n is not allowed with os_log.
++   if (FSType == Sema::FST_OSLog && CS.getKind() == ConversionSpecifier::nArg) {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_os_log_format_narg),
++                          getLocationOfByte(CS.getStart()),
++                          /*IsStringLocation*/ false,
++                          getSpecifierRange(startSpecifier, specifierLen));
++ 
++     return true;
++   }
++ 
++   // Only scalars are allowed for os_trace.
++   if (FSType == Sema::FST_OSTrace &&
++       (CS.getKind() == ConversionSpecifier::PArg ||
++        CS.getKind() == ConversionSpecifier::sArg ||
++        CS.getKind() == ConversionSpecifier::ObjCObjArg)) {
++     return HandleInvalidPrintfConversionSpecifier(FS, startSpecifier,
++                                                   specifierLen);
++   }
++ 
++   // Check for use of public/private annotation outside of os_log().
++   if (FSType != Sema::FST_OSLog) {
++     if (FS.isPublic().isSet()) {
++       EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_annotation)
++                                << "public",
++                            getLocationOfByte(FS.isPublic().getPosition()),
++                            /*IsStringLocation*/ false,
++                            getSpecifierRange(startSpecifier, specifierLen));
++     }
++     if (FS.isPrivate().isSet()) {
++       EmitFormatDiagnostic(S.PDiag(diag::warn_format_invalid_annotation)
++                                << "private",
++                            getLocationOfByte(FS.isPrivate().getPosition()),
++                            /*IsStringLocation*/ false,
++                            getSpecifierRange(startSpecifier, specifierLen));
++     }
++   }
++ 
++   // Check for invalid use of field width
++   if (!FS.hasValidFieldWidth()) {
++     HandleInvalidAmount(FS, FS.getFieldWidth(), /* field width */ 0,
++         startSpecifier, specifierLen);
++   }
++ 
++   // Check for invalid use of precision
++   if (!FS.hasValidPrecision()) {
++     HandleInvalidAmount(FS, FS.getPrecision(), /* precision */ 1,
++         startSpecifier, specifierLen);
++   }
++ 
++   // Precision is mandatory for %P specifier.
++   if (CS.getKind() == ConversionSpecifier::PArg &&
++       FS.getPrecision().getHowSpecified() == OptionalAmount::NotSpecified) {
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_P_no_precision),
++                          getLocationOfByte(startSpecifier),
++                          /*IsStringLocation*/ false,
++                          getSpecifierRange(startSpecifier, specifierLen));
++   }
++ 
++   // Check each flag does not conflict with any other component.
++   if (!FS.hasValidThousandsGroupingPrefix())
++     HandleFlag(FS, FS.hasThousandsGrouping(), startSpecifier, specifierLen);
++   if (!FS.hasValidLeadingZeros())
++     HandleFlag(FS, FS.hasLeadingZeros(), startSpecifier, specifierLen);
++   if (!FS.hasValidPlusPrefix())
++     HandleFlag(FS, FS.hasPlusPrefix(), startSpecifier, specifierLen);
++   if (!FS.hasValidSpacePrefix())
++     HandleFlag(FS, FS.hasSpacePrefix(), startSpecifier, specifierLen);
++   if (!FS.hasValidAlternativeForm())
++     HandleFlag(FS, FS.hasAlternativeForm(), startSpecifier, specifierLen);
++   if (!FS.hasValidLeftJustified())
++     HandleFlag(FS, FS.isLeftJustified(), startSpecifier, specifierLen);
++ 
++   // Check that flags are not ignored by another flag
++   if (FS.hasSpacePrefix() && FS.hasPlusPrefix()) // ' ' ignored by '+'
++     HandleIgnoredFlag(FS, FS.hasSpacePrefix(), FS.hasPlusPrefix(),
++         startSpecifier, specifierLen);
++   if (FS.hasLeadingZeros() && FS.isLeftJustified()) // '0' ignored by '-'
++     HandleIgnoredFlag(FS, FS.hasLeadingZeros(), FS.isLeftJustified(),
++             startSpecifier, specifierLen);
++ 
++   // Check the length modifier is valid with the given conversion specifier.
++   if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo(),
++                                  S.getLangOpts()))
++     HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
++                                 diag::warn_format_nonsensical_length);
++   else if (!FS.hasStandardLengthModifier())
++     HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
++   else if (!FS.hasStandardLengthConversionCombination())
++     HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
++                                 diag::warn_format_non_standard_conversion_spec);
++ 
++   if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
++     HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
++ 
++   // The remaining checks depend on the data arguments.
++   if (HasVAListArg)
++     return true;
++ 
++   if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex))
++     return false;
++ 
++   const Expr *Arg = getDataArg(argIndex);
++   if (!Arg)
++     return true;
++ 
++   return checkFormatExpr(FS, startSpecifier, specifierLen, Arg);
++ }
++ 
++ static bool requiresParensToAddCast(const Expr *E) {
++   // FIXME: We should have a general way to reason about operator
++   // precedence and whether parens are actually needed here.
++   // Take care of a few common cases where they aren't.
++   const Expr *Inside = E->IgnoreImpCasts();
++   if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(Inside))
++     Inside = POE->getSyntacticForm()->IgnoreImpCasts();
++ 
++   switch (Inside->getStmtClass()) {
++   case Stmt::ArraySubscriptExprClass:
++   case Stmt::CallExprClass:
++   case Stmt::CharacterLiteralClass:
++   case Stmt::CXXBoolLiteralExprClass:
++   case Stmt::DeclRefExprClass:
++   case Stmt::FloatingLiteralClass:
++   case Stmt::IntegerLiteralClass:
++   case Stmt::MemberExprClass:
++   case Stmt::ObjCArrayLiteralClass:
++   case Stmt::ObjCBoolLiteralExprClass:
++   case Stmt::ObjCBoxedExprClass:
++   case Stmt::ObjCDictionaryLiteralClass:
++   case Stmt::ObjCEncodeExprClass:
++   case Stmt::ObjCIvarRefExprClass:
++   case Stmt::ObjCMessageExprClass:
++   case Stmt::ObjCPropertyRefExprClass:
++   case Stmt::ObjCStringLiteralClass:
++   case Stmt::ObjCSubscriptRefExprClass:
++   case Stmt::ParenExprClass:
++   case Stmt::StringLiteralClass:
++   case Stmt::UnaryOperatorClass:
++     return false;
++   default:
++     return true;
++   }
++ }
++ 
++ static std::pair<QualType, StringRef>
++ shouldNotPrintDirectly(const ASTContext &Context,
++                        QualType IntendedTy,
++                        const Expr *E) {
++   // Use a 'while' to peel off layers of typedefs.
++   QualType TyTy = IntendedTy;
++   while (const TypedefType *UserTy = TyTy->getAs<TypedefType>()) {
++     StringRef Name = UserTy->getDecl()->getName();
++     QualType CastTy = llvm::StringSwitch<QualType>(Name)
++       .Case("CFIndex", Context.getNSIntegerType())
++       .Case("NSInteger", Context.getNSIntegerType())
++       .Case("NSUInteger", Context.getNSUIntegerType())
++       .Case("SInt32", Context.IntTy)
++       .Case("UInt32", Context.UnsignedIntTy)
++       .Default(QualType());
++ 
++     if (!CastTy.isNull())
++       return std::make_pair(CastTy, Name);
++ 
++     TyTy = UserTy->desugar();
++   }
++ 
++   // Strip parens if necessary.
++   if (const ParenExpr *PE = dyn_cast<ParenExpr>(E))
++     return shouldNotPrintDirectly(Context,
++                                   PE->getSubExpr()->getType(),
++                                   PE->getSubExpr());
++ 
++   // If this is a conditional expression, then its result type is constructed
++   // via usual arithmetic conversions and thus there might be no necessary
++   // typedef sugar there.  Recurse to operands to check for NSInteger &
++   // Co. usage condition.
++   if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
++     QualType TrueTy, FalseTy;
++     StringRef TrueName, FalseName;
++ 
++     std::tie(TrueTy, TrueName) =
++       shouldNotPrintDirectly(Context,
++                              CO->getTrueExpr()->getType(),
++                              CO->getTrueExpr());
++     std::tie(FalseTy, FalseName) =
++       shouldNotPrintDirectly(Context,
++                              CO->getFalseExpr()->getType(),
++                              CO->getFalseExpr());
++ 
++     if (TrueTy == FalseTy)
++       return std::make_pair(TrueTy, TrueName);
++     else if (TrueTy.isNull())
++       return std::make_pair(FalseTy, FalseName);
++     else if (FalseTy.isNull())
++       return std::make_pair(TrueTy, TrueName);
++   }
++ 
++   return std::make_pair(QualType(), StringRef());
++ }
++ 
++ /// Return true if \p ICE is an implicit argument promotion of an arithmetic
++ /// type. Bit-field 'promotions' from a higher ranked type to a lower ranked
++ /// type do not count.
++ static bool
++ isArithmeticArgumentPromotion(Sema &S, const ImplicitCastExpr *ICE) {
++   QualType From = ICE->getSubExpr()->getType();
++   QualType To = ICE->getType();
++   // It's an integer promotion if the destination type is the promoted
++   // source type.
++   if (ICE->getCastKind() == CK_IntegralCast &&
++       From->isPromotableIntegerType() &&
++       S.Context.getPromotedIntegerType(From) == To)
++     return true;
++   // Look through vector types, since we do default argument promotion for
++   // those in OpenCL.
++   if (const auto *VecTy = From->getAs<ExtVectorType>())
++     From = VecTy->getElementType();
++   if (const auto *VecTy = To->getAs<ExtVectorType>())
++     To = VecTy->getElementType();
++   // It's a floating promotion if the source type is a lower rank.
++   return ICE->getCastKind() == CK_FloatingCast &&
++          S.Context.getFloatingTypeOrder(From, To) < 0;
++ }
++ 
++ bool
++ CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
++                                     const char *StartSpecifier,
++                                     unsigned SpecifierLen,
++                                     const Expr *E) {
++   using namespace analyze_format_string;
++   using namespace analyze_printf;
++ 
++   // Now type check the data expression that matches the
++   // format specifier.
++   const analyze_printf::ArgType &AT = FS.getArgType(S.Context, isObjCContext());
++   if (!AT.isValid())
++     return true;
++ 
++   QualType ExprTy = E->getType();
++   while (const TypeOfExprType *TET = dyn_cast<TypeOfExprType>(ExprTy)) {
++     ExprTy = TET->getUnderlyingExpr()->getType();
++   }
++ 
++   // Diagnose attempts to print a boolean value as a character. Unlike other
++   // -Wformat diagnostics, this is fine from a type perspective, but it still
++   // doesn't make sense.
++   if (FS.getConversionSpecifier().getKind() == ConversionSpecifier::cArg &&
++       E->isKnownToHaveBooleanValue()) {
++     const CharSourceRange &CSR =
++         getSpecifierRange(StartSpecifier, SpecifierLen);
++     SmallString<4> FSString;
++     llvm::raw_svector_ostream os(FSString);
++     FS.toString(os);
++     EmitFormatDiagnostic(S.PDiag(diag::warn_format_bool_as_character)
++                              << FSString,
++                          E->getExprLoc(), false, CSR);
++     return true;
++   }
++ 
++   analyze_printf::ArgType::MatchKind Match = AT.matchesType(S.Context, ExprTy);
++   if (Match == analyze_printf::ArgType::Match)
++     return true;
++ 
++   // Look through argument promotions for our error message's reported type.
++   // This includes the integral and floating promotions, but excludes array
++   // and function pointer decay (seeing that an argument intended to be a
++   // string has type 'char [6]' is probably more confusing than 'char *') and
++   // certain bitfield promotions (bitfields can be 'demoted' to a lesser type).
++   if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
++     if (isArithmeticArgumentPromotion(S, ICE)) {
++       E = ICE->getSubExpr();
++       ExprTy = E->getType();
++ 
++       // Check if we didn't match because of an implicit cast from a 'char'
++       // or 'short' to an 'int'.  This is done because printf is a varargs
++       // function.
++       if (ICE->getType() == S.Context.IntTy ||
++           ICE->getType() == S.Context.UnsignedIntTy) {
++         // All further checking is done on the subexpression
++         const analyze_printf::ArgType::MatchKind ImplicitMatch =
++             AT.matchesType(S.Context, ExprTy);
++         if (ImplicitMatch == analyze_printf::ArgType::Match)
++           return true;
++         if (ImplicitMatch == ArgType::NoMatchPedantic ||
++             ImplicitMatch == ArgType::NoMatchTypeConfusion)
++           Match = ImplicitMatch;
++       }
++     }
++   } else if (const CharacterLiteral *CL = dyn_cast<CharacterLiteral>(E)) {
++     // Special case for 'a', which has type 'int' in C.
++     // Note, however, that we do /not/ want to treat multibyte constants like
++     // 'MooV' as characters! This form is deprecated but still exists. In
++     // addition, don't treat expressions as of type 'char' if one byte length
++     // modifier is provided.
++     if (ExprTy == S.Context.IntTy &&
++         FS.getLengthModifier().getKind() != LengthModifier::AsChar)
++       if (llvm::isUIntN(S.Context.getCharWidth(), CL->getValue()))
++         ExprTy = S.Context.CharTy;
++   }
++ 
++   // Look through enums to their underlying type.
++   bool IsEnum = false;
++   if (auto EnumTy = ExprTy->getAs<EnumType>()) {
++     ExprTy = EnumTy->getDecl()->getIntegerType();
++     IsEnum = true;
++   }
++ 
++   // %C in an Objective-C context prints a unichar, not a wchar_t.
++   // If the argument is an integer of some kind, believe the %C and suggest
++   // a cast instead of changing the conversion specifier.
++   QualType IntendedTy = ExprTy;
++   if (isObjCContext() &&
++       FS.getConversionSpecifier().getKind() == ConversionSpecifier::CArg) {
++     if (ExprTy->isIntegralOrUnscopedEnumerationType() &&
++         !ExprTy->isCharType()) {
++       // 'unichar' is defined as a typedef of unsigned short, but we should
++       // prefer using the typedef if it is visible.
++       IntendedTy = S.Context.UnsignedShortTy;
++ 
++       // While we are here, check if the value is an IntegerLiteral that happens
++       // to be within the valid range.
++       if (const IntegerLiteral *IL = dyn_cast<IntegerLiteral>(E)) {
++         const llvm::APInt &V = IL->getValue();
++         if (V.getActiveBits() <= S.Context.getTypeSize(IntendedTy))
++           return true;
++       }
++ 
++       LookupResult Result(S, &S.Context.Idents.get("unichar"), E->getBeginLoc(),
++                           Sema::LookupOrdinaryName);
++       if (S.LookupName(Result, S.getCurScope())) {
++         NamedDecl *ND = Result.getFoundDecl();
++         if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(ND))
++           if (TD->getUnderlyingType() == IntendedTy)
++             IntendedTy = S.Context.getTypedefType(TD);
++       }
++     }
++   }
++ 
++   // Special-case some of Darwin's platform-independence types by suggesting
++   // casts to primitive types that are known to be large enough.
++   bool ShouldNotPrintDirectly = false; StringRef CastTyName;
++   if (S.Context.getTargetInfo().getTriple().isOSDarwin()) {
++     QualType CastTy;
++     std::tie(CastTy, CastTyName) = shouldNotPrintDirectly(S.Context, IntendedTy, E);
++     if (!CastTy.isNull()) {
++       // %zi/%zu and %td/%tu are OK to use for NSInteger/NSUInteger of type int
++       // (long in ASTContext). Only complain to pedants.
++       if ((CastTyName == "NSInteger" || CastTyName == "NSUInteger") &&
++           (AT.isSizeT() || AT.isPtrdiffT()) &&
++           AT.matchesType(S.Context, CastTy))
++         Match = ArgType::NoMatchPedantic;
++       IntendedTy = CastTy;
++       ShouldNotPrintDirectly = true;
++     }
++   }
++ 
++   // We may be able to offer a FixItHint if it is a supported type.
++   PrintfSpecifier fixedFS = FS;
++   bool Success =
++       fixedFS.fixType(IntendedTy, S.getLangOpts(), S.Context, isObjCContext());
++ 
++   if (Success) {
++     // Get the fix string from the fixed format specifier
++     SmallString<16> buf;
++     llvm::raw_svector_ostream os(buf);
++     fixedFS.toString(os);
++ 
++     CharSourceRange SpecRange = getSpecifierRange(StartSpecifier, SpecifierLen);
++ 
++     if (IntendedTy == ExprTy && !ShouldNotPrintDirectly) {
++       unsigned Diag;
++       switch (Match) {
++       case ArgType::Match: llvm_unreachable("expected non-matching");
++       case ArgType::NoMatchPedantic:
++         Diag = diag::warn_format_conversion_argument_type_mismatch_pedantic;
++         break;
++       case ArgType::NoMatchTypeConfusion:
++         Diag = diag::warn_format_conversion_argument_type_mismatch_confusion;
++         break;
++       case ArgType::NoMatch:
++         Diag = diag::warn_format_conversion_argument_type_mismatch;
++         break;
++       }
++ 
++       // In this case, the specifier is wrong and should be changed to match
++       // the argument.
++       EmitFormatDiagnostic(S.PDiag(Diag)
++                                << AT.getRepresentativeTypeName(S.Context)
++                                << IntendedTy << IsEnum << E->getSourceRange(),
++                            E->getBeginLoc(),
++                            /*IsStringLocation*/ false, SpecRange,
++                            FixItHint::CreateReplacement(SpecRange, os.str()));
++     } else {
++       // The canonical type for formatting this value is different from the
++       // actual type of the expression. (This occurs, for example, with Darwin's
++       // NSInteger on 32-bit platforms, where it is typedef'd as 'int', but
++       // should be printed as 'long' for 64-bit compatibility.)
++       // Rather than emitting a normal format/argument mismatch, we want to
++       // add a cast to the recommended type (and correct the format string
++       // if necessary).
++       SmallString<16> CastBuf;
++       llvm::raw_svector_ostream CastFix(CastBuf);
++       CastFix << "(";
++       IntendedTy.print(CastFix, S.Context.getPrintingPolicy());
++       CastFix << ")";
++ 
++       SmallVector<FixItHint,4> Hints;
++       if (!AT.matchesType(S.Context, IntendedTy) || ShouldNotPrintDirectly)
++         Hints.push_back(FixItHint::CreateReplacement(SpecRange, os.str()));
++ 
++       if (const CStyleCastExpr *CCast = dyn_cast<CStyleCastExpr>(E)) {
++         // If there's already a cast present, just replace it.
++         SourceRange CastRange(CCast->getLParenLoc(), CCast->getRParenLoc());
++         Hints.push_back(FixItHint::CreateReplacement(CastRange, CastFix.str()));
++ 
++       } else if (!requiresParensToAddCast(E)) {
++         // If the expression has high enough precedence,
++         // just write the C-style cast.
++         Hints.push_back(
++             FixItHint::CreateInsertion(E->getBeginLoc(), CastFix.str()));
++       } else {
++         // Otherwise, add parens around the expression as well as the cast.
++         CastFix << "(";
++         Hints.push_back(
++             FixItHint::CreateInsertion(E->getBeginLoc(), CastFix.str()));
++ 
++         SourceLocation After = S.getLocForEndOfToken(E->getEndLoc());
++         Hints.push_back(FixItHint::CreateInsertion(After, ")"));
++       }
++ 
++       if (ShouldNotPrintDirectly) {
++         // The expression has a type that should not be printed directly.
++         // We extract the name from the typedef because we don't want to show
++         // the underlying type in the diagnostic.
++         StringRef Name;
++         if (const TypedefType *TypedefTy = dyn_cast<TypedefType>(ExprTy))
++           Name = TypedefTy->getDecl()->getName();
++         else
++           Name = CastTyName;
++         unsigned Diag = Match == ArgType::NoMatchPedantic
++                             ? diag::warn_format_argument_needs_cast_pedantic
++                             : diag::warn_format_argument_needs_cast;
++         EmitFormatDiagnostic(S.PDiag(Diag) << Name << IntendedTy << IsEnum
++                                            << E->getSourceRange(),
++                              E->getBeginLoc(), /*IsStringLocation=*/false,
++                              SpecRange, Hints);
++       } else {
++         // In this case, the expression could be printed using a different
++         // specifier, but we've decided that the specifier is probably correct
++         // and we should cast instead. Just use the normal warning message.
++         EmitFormatDiagnostic(
++             S.PDiag(diag::warn_format_conversion_argument_type_mismatch)
++                 << AT.getRepresentativeTypeName(S.Context) << ExprTy << IsEnum
++                 << E->getSourceRange(),
++             E->getBeginLoc(), /*IsStringLocation*/ false, SpecRange, Hints);
++       }
++     }
++   } else {
++     const CharSourceRange &CSR = getSpecifierRange(StartSpecifier,
++                                                    SpecifierLen);
++     // Since the warning for passing non-POD types to variadic functions
++     // was deferred until now, we emit a warning for non-POD
++     // arguments here.
++     switch (S.isValidVarArgType(ExprTy)) {
++     case Sema::VAK_Valid:
++     case Sema::VAK_ValidInCXX11: {
++       unsigned Diag;
++       switch (Match) {
++       case ArgType::Match: llvm_unreachable("expected non-matching");
++       case ArgType::NoMatchPedantic:
++         Diag = diag::warn_format_conversion_argument_type_mismatch_pedantic;
++         break;
++       case ArgType::NoMatchTypeConfusion:
++         Diag = diag::warn_format_conversion_argument_type_mismatch_confusion;
++         break;
++       case ArgType::NoMatch:
++         Diag = diag::warn_format_conversion_argument_type_mismatch;
++         break;
++       }
++ 
++       EmitFormatDiagnostic(
++           S.PDiag(Diag) << AT.getRepresentativeTypeName(S.Context) << ExprTy
++                         << IsEnum << CSR << E->getSourceRange(),
++           E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
++       break;
++     }
++     case Sema::VAK_Undefined:
++     case Sema::VAK_MSVCUndefined:
++       EmitFormatDiagnostic(S.PDiag(diag::warn_non_pod_vararg_with_format_string)
++                                << S.getLangOpts().CPlusPlus11 << ExprTy
++                                << CallType
++                                << AT.getRepresentativeTypeName(S.Context) << CSR
++                                << E->getSourceRange(),
++                            E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
++       checkForCStrMembers(AT, E);
++       break;
++ 
++     case Sema::VAK_Invalid:
++       if (ExprTy->isObjCObjectType())
++         EmitFormatDiagnostic(
++             S.PDiag(diag::err_cannot_pass_objc_interface_to_vararg_format)
++                 << S.getLangOpts().CPlusPlus11 << ExprTy << CallType
++                 << AT.getRepresentativeTypeName(S.Context) << CSR
++                 << E->getSourceRange(),
++             E->getBeginLoc(), /*IsStringLocation*/ false, CSR);
++       else
++         // FIXME: If this is an initializer list, suggest removing the braces
++         // or inserting a cast to the target type.
++         S.Diag(E->getBeginLoc(), diag::err_cannot_pass_to_vararg_format)
++             << isa<InitListExpr>(E) << ExprTy << CallType
++             << AT.getRepresentativeTypeName(S.Context) << E->getSourceRange();
++       break;
++     }
++ 
++     assert(FirstDataArg + FS.getArgIndex() < CheckedVarArgs.size() &&
++            "format string specifier index out of range");
++     CheckedVarArgs[FirstDataArg + FS.getArgIndex()] = true;
++   }
++ 
++   return true;
++ }
++ 
++ //===--- CHECK: Scanf format string checking ------------------------------===//
++ 
++ namespace {
++ 
++ class CheckScanfHandler : public CheckFormatHandler {
++ public:
++   CheckScanfHandler(Sema &s, const FormatStringLiteral *fexpr,
++                     const Expr *origFormatExpr, Sema::FormatStringType type,
++                     unsigned firstDataArg, unsigned numDataArgs,
++                     const char *beg, bool hasVAListArg,
++                     ArrayRef<const Expr *> Args, unsigned formatIdx,
++                     bool inFunctionCall, Sema::VariadicCallType CallType,
++                     llvm::SmallBitVector &CheckedVarArgs,
++                     UncoveredArgHandler &UncoveredArg)
++       : CheckFormatHandler(s, fexpr, origFormatExpr, type, firstDataArg,
++                            numDataArgs, beg, hasVAListArg, Args, formatIdx,
++                            inFunctionCall, CallType, CheckedVarArgs,
++                            UncoveredArg) {}
++ 
++   bool HandleScanfSpecifier(const analyze_scanf::ScanfSpecifier &FS,
++                             const char *startSpecifier,
++                             unsigned specifierLen) override;
++ 
++   bool HandleInvalidScanfConversionSpecifier(
++           const analyze_scanf::ScanfSpecifier &FS,
++           const char *startSpecifier,
++           unsigned specifierLen) override;
++ 
++   void HandleIncompleteScanList(const char *start, const char *end) override;
++ };
++ 
++ } // namespace
++ 
++ void CheckScanfHandler::HandleIncompleteScanList(const char *start,
++                                                  const char *end) {
++   EmitFormatDiagnostic(S.PDiag(diag::warn_scanf_scanlist_incomplete),
++                        getLocationOfByte(end), /*IsStringLocation*/true,
++                        getSpecifierRange(start, end - start));
++ }
++ 
++ bool CheckScanfHandler::HandleInvalidScanfConversionSpecifier(
++                                         const analyze_scanf::ScanfSpecifier &FS,
++                                         const char *startSpecifier,
++                                         unsigned specifierLen) {
++   const analyze_scanf::ScanfConversionSpecifier &CS =
++     FS.getConversionSpecifier();
++ 
++   return HandleInvalidConversionSpecifier(FS.getArgIndex(),
++                                           getLocationOfByte(CS.getStart()),
++                                           startSpecifier, specifierLen,
++                                           CS.getStart(), CS.getLength());
++ }
++ 
++ bool CheckScanfHandler::HandleScanfSpecifier(
++                                        const analyze_scanf::ScanfSpecifier &FS,
++                                        const char *startSpecifier,
++                                        unsigned specifierLen) {
++   using namespace analyze_scanf;
++   using namespace analyze_format_string;
++ 
++   const ScanfConversionSpecifier &CS = FS.getConversionSpecifier();
++ 
++   // Handle case where '%' and '*' don't consume an argument.  These shouldn't
++   // be used to decide if we are using positional arguments consistently.
++   if (FS.consumesDataArgument()) {
++     if (atFirstArg) {
++       atFirstArg = false;
++       usesPositionalArgs = FS.usesPositionalArg();
++     }
++     else if (usesPositionalArgs != FS.usesPositionalArg()) {
++       HandlePositionalNonpositionalArgs(getLocationOfByte(CS.getStart()),
++                                         startSpecifier, specifierLen);
++       return false;
++     }
++   }
++ 
++   // Check if the field with is non-zero.
++   const OptionalAmount &Amt = FS.getFieldWidth();
++   if (Amt.getHowSpecified() == OptionalAmount::Constant) {
++     if (Amt.getConstantAmount() == 0) {
++       const CharSourceRange &R = getSpecifierRange(Amt.getStart(),
++                                                    Amt.getConstantLength());
++       EmitFormatDiagnostic(S.PDiag(diag::warn_scanf_nonzero_width),
++                            getLocationOfByte(Amt.getStart()),
++                            /*IsStringLocation*/true, R,
++                            FixItHint::CreateRemoval(R));
++     }
++   }
++ 
++   if (!FS.consumesDataArgument()) {
++     // FIXME: Technically specifying a precision or field width here
++     // makes no sense.  Worth issuing a warning at some point.
++     return true;
++   }
++ 
++   // Consume the argument.
++   unsigned argIndex = FS.getArgIndex();
++   if (argIndex < NumDataArgs) {
++       // The check to see if the argIndex is valid will come later.
++       // We set the bit here because we may exit early from this
++       // function if we encounter some other error.
++     CoveredArgs.set(argIndex);
++   }
++ 
++   // Check the length modifier is valid with the given conversion specifier.
++   if (!FS.hasValidLengthModifier(S.getASTContext().getTargetInfo(),
++                                  S.getLangOpts()))
++     HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
++                                 diag::warn_format_nonsensical_length);
++   else if (!FS.hasStandardLengthModifier())
++     HandleNonStandardLengthModifier(FS, startSpecifier, specifierLen);
++   else if (!FS.hasStandardLengthConversionCombination())
++     HandleInvalidLengthModifier(FS, CS, startSpecifier, specifierLen,
++                                 diag::warn_format_non_standard_conversion_spec);
++ 
++   if (!FS.hasStandardConversionSpecifier(S.getLangOpts()))
++     HandleNonStandardConversionSpecifier(CS, startSpecifier, specifierLen);
++ 
++   // The remaining checks depend on the data arguments.
++   if (HasVAListArg)
++     return true;
++ 
++   if (!CheckNumArgs(FS, CS, startSpecifier, specifierLen, argIndex))
++     return false;
++ 
++   // Check that the argument type matches the format specifier.
++   const Expr *Ex = getDataArg(argIndex);
++   if (!Ex)
++     return true;
++ 
++   const analyze_format_string::ArgType &AT = FS.getArgType(S.Context);
++ 
++   if (!AT.isValid()) {
++     return true;
++   }
++ 
++   analyze_format_string::ArgType::MatchKind Match =
++       AT.matchesType(S.Context, Ex->getType());
++   bool Pedantic = Match == analyze_format_string::ArgType::NoMatchPedantic;
++   if (Match == analyze_format_string::ArgType::Match)
++     return true;
++ 
++   ScanfSpecifier fixedFS = FS;
++   bool Success = fixedFS.fixType(Ex->getType(), Ex->IgnoreImpCasts()->getType(),
++                                  S.getLangOpts(), S.Context);
++ 
++   unsigned Diag =
++       Pedantic ? diag::warn_format_conversion_argument_type_mismatch_pedantic
++                : diag::warn_format_conversion_argument_type_mismatch;
++ 
++   if (Success) {
++     // Get the fix string from the fixed format specifier.
++     SmallString<128> buf;
++     llvm::raw_svector_ostream os(buf);
++     fixedFS.toString(os);
++ 
++     EmitFormatDiagnostic(
++         S.PDiag(Diag) << AT.getRepresentativeTypeName(S.Context)
++                       << Ex->getType() << false << Ex->getSourceRange(),
++         Ex->getBeginLoc(),
++         /*IsStringLocation*/ false,
++         getSpecifierRange(startSpecifier, specifierLen),
++         FixItHint::CreateReplacement(
++             getSpecifierRange(startSpecifier, specifierLen), os.str()));
++   } else {
++     EmitFormatDiagnostic(S.PDiag(Diag)
++                              << AT.getRepresentativeTypeName(S.Context)
++                              << Ex->getType() << false << Ex->getSourceRange(),
++                          Ex->getBeginLoc(),
++                          /*IsStringLocation*/ false,
++                          getSpecifierRange(startSpecifier, specifierLen));
++   }
++ 
++   return true;
++ }
++ 
++ static void CheckFormatString(Sema &S, const FormatStringLiteral *FExpr,
++                               const Expr *OrigFormatExpr,
++                               ArrayRef<const Expr *> Args,
++                               bool HasVAListArg, unsigned format_idx,
++                               unsigned firstDataArg,
++                               Sema::FormatStringType Type,
++                               bool inFunctionCall,
++                               Sema::VariadicCallType CallType,
++                               llvm::SmallBitVector &CheckedVarArgs,
++                               UncoveredArgHandler &UncoveredArg,
++                               bool IgnoreStringsWithoutSpecifiers) {
++   // CHECK: is the format string a wide literal?
++   if (!FExpr->isAscii() && !FExpr->isUTF8()) {
++     CheckFormatHandler::EmitFormatDiagnostic(
++         S, inFunctionCall, Args[format_idx],
++         S.PDiag(diag::warn_format_string_is_wide_literal), FExpr->getBeginLoc(),
++         /*IsStringLocation*/ true, OrigFormatExpr->getSourceRange());
++     return;
++   }
++ 
++   // Str - The format string.  NOTE: this is NOT null-terminated!
++   StringRef StrRef = FExpr->getString();
++   const char *Str = StrRef.data();
++   // Account for cases where the string literal is truncated in a declaration.
++   const ConstantArrayType *T =
++     S.Context.getAsConstantArrayType(FExpr->getType());
++   assert(T && "String literal not of constant array type!");
++   size_t TypeSize = T->getSize().getZExtValue();
++   size_t StrLen = std::min(std::max(TypeSize, size_t(1)) - 1, StrRef.size());
++   const unsigned numDataArgs = Args.size() - firstDataArg;
++ 
++   if (IgnoreStringsWithoutSpecifiers &&
++       !analyze_format_string::parseFormatStringHasFormattingSpecifiers(
++           Str, Str + StrLen, S.getLangOpts(), S.Context.getTargetInfo()))
++     return;
++ 
++   // Emit a warning if the string literal is truncated and does not contain an
++   // embedded null character.
++   if (TypeSize <= StrRef.size() &&
++       StrRef.substr(0, TypeSize).find('\0') == StringRef::npos) {
++     CheckFormatHandler::EmitFormatDiagnostic(
++         S, inFunctionCall, Args[format_idx],
++         S.PDiag(diag::warn_printf_format_string_not_null_terminated),
++         FExpr->getBeginLoc(),
++         /*IsStringLocation=*/true, OrigFormatExpr->getSourceRange());
++     return;
++   }
++ 
++   // CHECK: empty format string?
++   if (StrLen == 0 && numDataArgs > 0) {
++     CheckFormatHandler::EmitFormatDiagnostic(
++         S, inFunctionCall, Args[format_idx],
++         S.PDiag(diag::warn_empty_format_string), FExpr->getBeginLoc(),
++         /*IsStringLocation*/ true, OrigFormatExpr->getSourceRange());
++     return;
++   }
++ 
++   if (Type == Sema::FST_Printf || Type == Sema::FST_NSString ||
++       Type == Sema::FST_FreeBSDKPrintf || Type == Sema::FST_OSLog ||
++       Type == Sema::FST_OSTrace) {
++     CheckPrintfHandler H(
++         S, FExpr, OrigFormatExpr, Type, firstDataArg, numDataArgs,
++         (Type == Sema::FST_NSString || Type == Sema::FST_OSTrace), Str,
++         HasVAListArg, Args, format_idx, inFunctionCall, CallType,
++         CheckedVarArgs, UncoveredArg);
++ 
++     if (!analyze_format_string::ParsePrintfString(H, Str, Str + StrLen,
++                                                   S.getLangOpts(),
++                                                   S.Context.getTargetInfo(),
++                                             Type == Sema::FST_FreeBSDKPrintf))
++       H.DoneProcessing();
++   } else if (Type == Sema::FST_Scanf) {
++     CheckScanfHandler H(S, FExpr, OrigFormatExpr, Type, firstDataArg,
++                         numDataArgs, Str, HasVAListArg, Args, format_idx,
++                         inFunctionCall, CallType, CheckedVarArgs, UncoveredArg);
++ 
++     if (!analyze_format_string::ParseScanfString(H, Str, Str + StrLen,
++                                                  S.getLangOpts(),
++                                                  S.Context.getTargetInfo()))
++       H.DoneProcessing();
++   } // TODO: handle other formats
++ }
++ 
++ bool Sema::FormatStringHasSArg(const StringLiteral *FExpr) {
++   // Str - The format string.  NOTE: this is NOT null-terminated!
++   StringRef StrRef = FExpr->getString();
++   const char *Str = StrRef.data();
++   // Account for cases where the string literal is truncated in a declaration.
++   const ConstantArrayType *T = Context.getAsConstantArrayType(FExpr->getType());
++   assert(T && "String literal not of constant array type!");
++   size_t TypeSize = T->getSize().getZExtValue();
++   size_t StrLen = std::min(std::max(TypeSize, size_t(1)) - 1, StrRef.size());
++   return analyze_format_string::ParseFormatStringHasSArg(Str, Str + StrLen,
++                                                          getLangOpts(),
++                                                          Context.getTargetInfo());
++ }
++ 
++ //===--- CHECK: Warn on use of wrong absolute value function. -------------===//
++ 
++ // Returns the related absolute value function that is larger, of 0 if one
++ // does not exist.
++ static unsigned getLargerAbsoluteValueFunction(unsigned AbsFunction) {
++   switch (AbsFunction) {
++   default:
++     return 0;
++ 
++   case Builtin::BI__builtin_abs:
++     return Builtin::BI__builtin_labs;
++   case Builtin::BI__builtin_labs:
++     return Builtin::BI__builtin_llabs;
++   case Builtin::BI__builtin_llabs:
++     return 0;
++ 
++   case Builtin::BI__builtin_fabsf:
++     return Builtin::BI__builtin_fabs;
++   case Builtin::BI__builtin_fabs:
++     return Builtin::BI__builtin_fabsl;
++   case Builtin::BI__builtin_fabsl:
++     return 0;
++ 
++   case Builtin::BI__builtin_cabsf:
++     return Builtin::BI__builtin_cabs;
++   case Builtin::BI__builtin_cabs:
++     return Builtin::BI__builtin_cabsl;
++   case Builtin::BI__builtin_cabsl:
++     return 0;
++ 
++   case Builtin::BIabs:
++     return Builtin::BIlabs;
++   case Builtin::BIlabs:
++     return Builtin::BIllabs;
++   case Builtin::BIllabs:
++     return 0;
++ 
++   case Builtin::BIfabsf:
++     return Builtin::BIfabs;
++   case Builtin::BIfabs:
++     return Builtin::BIfabsl;
++   case Builtin::BIfabsl:
++     return 0;
++ 
++   case Builtin::BIcabsf:
++    return Builtin::BIcabs;
++   case Builtin::BIcabs:
++     return Builtin::BIcabsl;
++   case Builtin::BIcabsl:
++     return 0;
++   }
++ }
++ 
++ // Returns the argument type of the absolute value function.
++ static QualType getAbsoluteValueArgumentType(ASTContext &Context,
++                                              unsigned AbsType) {
++   if (AbsType == 0)
++     return QualType();
++ 
++   ASTContext::GetBuiltinTypeError Error = ASTContext::GE_None;
++   QualType BuiltinType = Context.GetBuiltinType(AbsType, Error);
++   if (Error != ASTContext::GE_None)
++     return QualType();
++ 
++   const FunctionProtoType *FT = BuiltinType->getAs<FunctionProtoType>();
++   if (!FT)
++     return QualType();
++ 
++   if (FT->getNumParams() != 1)
++     return QualType();
++ 
++   return FT->getParamType(0);
++ }
++ 
++ // Returns the best absolute value function, or zero, based on type and
++ // current absolute value function.
++ static unsigned getBestAbsFunction(ASTContext &Context, QualType ArgType,
++                                    unsigned AbsFunctionKind) {
++   unsigned BestKind = 0;
++   uint64_t ArgSize = Context.getTypeSize(ArgType);
++   for (unsigned Kind = AbsFunctionKind; Kind != 0;
++        Kind = getLargerAbsoluteValueFunction(Kind)) {
++     QualType ParamType = getAbsoluteValueArgumentType(Context, Kind);
++     if (Context.getTypeSize(ParamType) >= ArgSize) {
++       if (BestKind == 0)
++         BestKind = Kind;
++       else if (Context.hasSameType(ParamType, ArgType)) {
++         BestKind = Kind;
++         break;
++       }
++     }
++   }
++   return BestKind;
++ }
++ 
++ enum AbsoluteValueKind {
++   AVK_Integer,
++   AVK_Floating,
++   AVK_Complex
++ };
++ 
++ static AbsoluteValueKind getAbsoluteValueKind(QualType T) {
++   if (T->isIntegralOrEnumerationType())
++     return AVK_Integer;
++   if (T->isRealFloatingType())
++     return AVK_Floating;
++   if (T->isAnyComplexType())
++     return AVK_Complex;
++ 
++   llvm_unreachable("Type not integer, floating, or complex");
++ }
++ 
++ // Changes the absolute value function to a different type.  Preserves whether
++ // the function is a builtin.
++ static unsigned changeAbsFunction(unsigned AbsKind,
++                                   AbsoluteValueKind ValueKind) {
++   switch (ValueKind) {
++   case AVK_Integer:
++     switch (AbsKind) {
++     default:
++       return 0;
++     case Builtin::BI__builtin_fabsf:
++     case Builtin::BI__builtin_fabs:
++     case Builtin::BI__builtin_fabsl:
++     case Builtin::BI__builtin_cabsf:
++     case Builtin::BI__builtin_cabs:
++     case Builtin::BI__builtin_cabsl:
++       return Builtin::BI__builtin_abs;
++     case Builtin::BIfabsf:
++     case Builtin::BIfabs:
++     case Builtin::BIfabsl:
++     case Builtin::BIcabsf:
++     case Builtin::BIcabs:
++     case Builtin::BIcabsl:
++       return Builtin::BIabs;
++     }
++   case AVK_Floating:
++     switch (AbsKind) {
++     default:
++       return 0;
++     case Builtin::BI__builtin_abs:
++     case Builtin::BI__builtin_labs:
++     case Builtin::BI__builtin_llabs:
++     case Builtin::BI__builtin_cabsf:
++     case Builtin::BI__builtin_cabs:
++     case Builtin::BI__builtin_cabsl:
++       return Builtin::BI__builtin_fabsf;
++     case Builtin::BIabs:
++     case Builtin::BIlabs:
++     case Builtin::BIllabs:
++     case Builtin::BIcabsf:
++     case Builtin::BIcabs:
++     case Builtin::BIcabsl:
++       return Builtin::BIfabsf;
++     }
++   case AVK_Complex:
++     switch (AbsKind) {
++     default:
++       return 0;
++     case Builtin::BI__builtin_abs:
++     case Builtin::BI__builtin_labs:
++     case Builtin::BI__builtin_llabs:
++     case Builtin::BI__builtin_fabsf:
++     case Builtin::BI__builtin_fabs:
++     case Builtin::BI__builtin_fabsl:
++       return Builtin::BI__builtin_cabsf;
++     case Builtin::BIabs:
++     case Builtin::BIlabs:
++     case Builtin::BIllabs:
++     case Builtin::BIfabsf:
++     case Builtin::BIfabs:
++     case Builtin::BIfabsl:
++       return Builtin::BIcabsf;
++     }
++   }
++   llvm_unreachable("Unable to convert function");
++ }
++ 
++ static unsigned getAbsoluteValueFunctionKind(const FunctionDecl *FDecl) {
++   const IdentifierInfo *FnInfo = FDecl->getIdentifier();
++   if (!FnInfo)
++     return 0;
++ 
++   switch (FDecl->getBuiltinID()) {
++   default:
++     return 0;
++   case Builtin::BI__builtin_abs:
++   case Builtin::BI__builtin_fabs:
++   case Builtin::BI__builtin_fabsf:
++   case Builtin::BI__builtin_fabsl:
++   case Builtin::BI__builtin_labs:
++   case Builtin::BI__builtin_llabs:
++   case Builtin::BI__builtin_cabs:
++   case Builtin::BI__builtin_cabsf:
++   case Builtin::BI__builtin_cabsl:
++   case Builtin::BIabs:
++   case Builtin::BIlabs:
++   case Builtin::BIllabs:
++   case Builtin::BIfabs:
++   case Builtin::BIfabsf:
++   case Builtin::BIfabsl:
++   case Builtin::BIcabs:
++   case Builtin::BIcabsf:
++   case Builtin::BIcabsl:
++     return FDecl->getBuiltinID();
++   }
++   llvm_unreachable("Unknown Builtin type");
++ }
++ 
++ // If the replacement is valid, emit a note with replacement function.
++ // Additionally, suggest including the proper header if not already included.
++ static void emitReplacement(Sema &S, SourceLocation Loc, SourceRange Range,
++                             unsigned AbsKind, QualType ArgType) {
++   bool EmitHeaderHint = true;
++   const char *HeaderName = nullptr;
++   const char *FunctionName = nullptr;
++   if (S.getLangOpts().CPlusPlus && !ArgType->isAnyComplexType()) {
++     FunctionName = "std::abs";
++     if (ArgType->isIntegralOrEnumerationType()) {
++       HeaderName = "cstdlib";
++     } else if (ArgType->isRealFloatingType()) {
++       HeaderName = "cmath";
++     } else {
++       llvm_unreachable("Invalid Type");
++     }
++ 
++     // Lookup all std::abs
++     if (NamespaceDecl *Std = S.getStdNamespace()) {
++       LookupResult R(S, &S.Context.Idents.get("abs"), Loc, Sema::LookupAnyName);
++       R.suppressDiagnostics();
++       S.LookupQualifiedName(R, Std);
++ 
++       for (const auto *I : R) {
++         const FunctionDecl *FDecl = nullptr;
++         if (const UsingShadowDecl *UsingD = dyn_cast<UsingShadowDecl>(I)) {
++           FDecl = dyn_cast<FunctionDecl>(UsingD->getTargetDecl());
++         } else {
++           FDecl = dyn_cast<FunctionDecl>(I);
++         }
++         if (!FDecl)
++           continue;
++ 
++         // Found std::abs(), check that they are the right ones.
++         if (FDecl->getNumParams() != 1)
++           continue;
++ 
++         // Check that the parameter type can handle the argument.
++         QualType ParamType = FDecl->getParamDecl(0)->getType();
++         if (getAbsoluteValueKind(ArgType) == getAbsoluteValueKind(ParamType) &&
++             S.Context.getTypeSize(ArgType) <=
++                 S.Context.getTypeSize(ParamType)) {
++           // Found a function, don't need the header hint.
++           EmitHeaderHint = false;
++           break;
++         }
++       }
++     }
++   } else {
++     FunctionName = S.Context.BuiltinInfo.getName(AbsKind);
++     HeaderName = S.Context.BuiltinInfo.getHeaderName(AbsKind);
++ 
++     if (HeaderName) {
++       DeclarationName DN(&S.Context.Idents.get(FunctionName));
++       LookupResult R(S, DN, Loc, Sema::LookupAnyName);
++       R.suppressDiagnostics();
++       S.LookupName(R, S.getCurScope());
++ 
++       if (R.isSingleResult()) {
++         FunctionDecl *FD = dyn_cast<FunctionDecl>(R.getFoundDecl());
++         if (FD && FD->getBuiltinID() == AbsKind) {
++           EmitHeaderHint = false;
++         } else {
++           return;
++         }
++       } else if (!R.empty()) {
++         return;
++       }
++     }
++   }
++ 
++   S.Diag(Loc, diag::note_replace_abs_function)
++       << FunctionName << FixItHint::CreateReplacement(Range, FunctionName);
++ 
++   if (!HeaderName)
++     return;
++ 
++   if (!EmitHeaderHint)
++     return;
++ 
++   S.Diag(Loc, diag::note_include_header_or_declare) << HeaderName
++                                                     << FunctionName;
++ }
++ 
++ template <std::size_t StrLen>
++ static bool IsStdFunction(const FunctionDecl *FDecl,
++                           const char (&Str)[StrLen]) {
++   if (!FDecl)
++     return false;
++   if (!FDecl->getIdentifier() || !FDecl->getIdentifier()->isStr(Str))
++     return false;
++   if (!FDecl->isInStdNamespace())
++     return false;
++ 
++   return true;
++ }
++ 
++ // Warn when using the wrong abs() function.
++ void Sema::CheckAbsoluteValueFunction(const CallExpr *Call,
++                                       const FunctionDecl *FDecl) {
++   if (Call->getNumArgs() != 1)
++     return;
++ 
++   unsigned AbsKind = getAbsoluteValueFunctionKind(FDecl);
++   bool IsStdAbs = IsStdFunction(FDecl, "abs");
++   if (AbsKind == 0 && !IsStdAbs)
++     return;
++ 
++   QualType ArgType = Call->getArg(0)->IgnoreParenImpCasts()->getType();
++   QualType ParamType = Call->getArg(0)->getType();
++ 
++   // Unsigned types cannot be negative.  Suggest removing the absolute value
++   // function call.
++   if (ArgType->isUnsignedIntegerType()) {
++     const char *FunctionName =
++         IsStdAbs ? "std::abs" : Context.BuiltinInfo.getName(AbsKind);
++     Diag(Call->getExprLoc(), diag::warn_unsigned_abs) << ArgType << ParamType;
++     Diag(Call->getExprLoc(), diag::note_remove_abs)
++         << FunctionName
++         << FixItHint::CreateRemoval(Call->getCallee()->getSourceRange());
++     return;
++   }
++ 
++   // Taking the absolute value of a pointer is very suspicious, they probably
++   // wanted to index into an array, dereference a pointer, call a function, etc.
++   if (ArgType->isPointerType() || ArgType->canDecayToPointerType()) {
++     unsigned DiagType = 0;
++     if (ArgType->isFunctionType())
++       DiagType = 1;
++     else if (ArgType->isArrayType())
++       DiagType = 2;
++ 
++     Diag(Call->getExprLoc(), diag::warn_pointer_abs) << DiagType << ArgType;
++     return;
++   }
++ 
++   // std::abs has overloads which prevent most of the absolute value problems
++   // from occurring.
++   if (IsStdAbs)
++     return;
++ 
++   AbsoluteValueKind ArgValueKind = getAbsoluteValueKind(ArgType);
++   AbsoluteValueKind ParamValueKind = getAbsoluteValueKind(ParamType);
++ 
++   // The argument and parameter are the same kind.  Check if they are the right
++   // size.
++   if (ArgValueKind == ParamValueKind) {
++     if (Context.getTypeSize(ArgType) <= Context.getTypeSize(ParamType))
++       return;
++ 
++     unsigned NewAbsKind = getBestAbsFunction(Context, ArgType, AbsKind);
++     Diag(Call->getExprLoc(), diag::warn_abs_too_small)
++         << FDecl << ArgType << ParamType;
++ 
++     if (NewAbsKind == 0)
++       return;
++ 
++     emitReplacement(*this, Call->getExprLoc(),
++                     Call->getCallee()->getSourceRange(), NewAbsKind, ArgType);
++     return;
++   }
++ 
++   // ArgValueKind != ParamValueKind
++   // The wrong type of absolute value function was used.  Attempt to find the
++   // proper one.
++   unsigned NewAbsKind = changeAbsFunction(AbsKind, ArgValueKind);
++   NewAbsKind = getBestAbsFunction(Context, ArgType, NewAbsKind);
++   if (NewAbsKind == 0)
++     return;
++ 
++   Diag(Call->getExprLoc(), diag::warn_wrong_absolute_value_type)
++       << FDecl << ParamValueKind << ArgValueKind;
++ 
++   emitReplacement(*this, Call->getExprLoc(),
++                   Call->getCallee()->getSourceRange(), NewAbsKind, ArgType);
++ }
++ 
++ //===--- CHECK: Warn on use of std::max and unsigned zero. r---------------===//
++ void Sema::CheckMaxUnsignedZero(const CallExpr *Call,
++                                 const FunctionDecl *FDecl) {
++   if (!Call || !FDecl) return;
++ 
++   // Ignore template specializations and macros.
++   if (inTemplateInstantiation()) return;
++   if (Call->getExprLoc().isMacroID()) return;
++ 
++   // Only care about the one template argument, two function parameter std::max
++   if (Call->getNumArgs() != 2) return;
++   if (!IsStdFunction(FDecl, "max")) return;
++   const auto * ArgList = FDecl->getTemplateSpecializationArgs();
++   if (!ArgList) return;
++   if (ArgList->size() != 1) return;
++ 
++   // Check that template type argument is unsigned integer.
++   const auto& TA = ArgList->get(0);
++   if (TA.getKind() != TemplateArgument::Type) return;
++   QualType ArgType = TA.getAsType();
++   if (!ArgType->isUnsignedIntegerType()) return;
++ 
++   // See if either argument is a literal zero.
++   auto IsLiteralZeroArg = [](const Expr* E) -> bool {
++     const auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E);
++     if (!MTE) return false;
++     const auto *Num = dyn_cast<IntegerLiteral>(MTE->getSubExpr());
++     if (!Num) return false;
++     if (Num->getValue() != 0) return false;
++     return true;
++   };
++ 
++   const Expr *FirstArg = Call->getArg(0);
++   const Expr *SecondArg = Call->getArg(1);
++   const bool IsFirstArgZero = IsLiteralZeroArg(FirstArg);
++   const bool IsSecondArgZero = IsLiteralZeroArg(SecondArg);
++ 
++   // Only warn when exactly one argument is zero.
++   if (IsFirstArgZero == IsSecondArgZero) return;
++ 
++   SourceRange FirstRange = FirstArg->getSourceRange();
++   SourceRange SecondRange = SecondArg->getSourceRange();
++ 
++   SourceRange ZeroRange = IsFirstArgZero ? FirstRange : SecondRange;
++ 
++   Diag(Call->getExprLoc(), diag::warn_max_unsigned_zero)
++       << IsFirstArgZero << Call->getCallee()->getSourceRange() << ZeroRange;
++ 
++   // Deduce what parts to remove so that "std::max(0u, foo)" becomes "(foo)".
++   SourceRange RemovalRange;
++   if (IsFirstArgZero) {
++     RemovalRange = SourceRange(FirstRange.getBegin(),
++                                SecondRange.getBegin().getLocWithOffset(-1));
++   } else {
++     RemovalRange = SourceRange(getLocForEndOfToken(FirstRange.getEnd()),
++                                SecondRange.getEnd());
++   }
++ 
++   Diag(Call->getExprLoc(), diag::note_remove_max_call)
++         << FixItHint::CreateRemoval(Call->getCallee()->getSourceRange())
++         << FixItHint::CreateRemoval(RemovalRange);
++ }
++ 
++ //===--- CHECK: Standard memory functions ---------------------------------===//
++ 
++ /// Takes the expression passed to the size_t parameter of functions
++ /// such as memcmp, strncat, etc and warns if it's a comparison.
++ ///
++ /// This is to catch typos like `if (memcmp(&a, &b, sizeof(a) > 0))`.
++ static bool CheckMemorySizeofForComparison(Sema &S, const Expr *E,
++                                            IdentifierInfo *FnName,
++                                            SourceLocation FnLoc,
++                                            SourceLocation RParenLoc) {
++   const BinaryOperator *Size = dyn_cast<BinaryOperator>(E);
++   if (!Size)
++     return false;
++ 
++   // if E is binop and op is <=>, >, <, >=, <=, ==, &&, ||:
++   if (!Size->isComparisonOp() && !Size->isLogicalOp())
++     return false;
++ 
++   SourceRange SizeRange = Size->getSourceRange();
++   S.Diag(Size->getOperatorLoc(), diag::warn_memsize_comparison)
++       << SizeRange << FnName;
++   S.Diag(FnLoc, diag::note_memsize_comparison_paren)
++       << FnName
++       << FixItHint::CreateInsertion(
++              S.getLocForEndOfToken(Size->getLHS()->getEndLoc()), ")")
++       << FixItHint::CreateRemoval(RParenLoc);
++   S.Diag(SizeRange.getBegin(), diag::note_memsize_comparison_cast_silence)
++       << FixItHint::CreateInsertion(SizeRange.getBegin(), "(size_t)(")
++       << FixItHint::CreateInsertion(S.getLocForEndOfToken(SizeRange.getEnd()),
++                                     ")");
++ 
++   return true;
++ }
++ 
++ /// Determine whether the given type is or contains a dynamic class type
++ /// (e.g., whether it has a vtable).
++ static const CXXRecordDecl *getContainedDynamicClass(QualType T,
++                                                      bool &IsContained) {
++   // Look through array types while ignoring qualifiers.
++   const Type *Ty = T->getBaseElementTypeUnsafe();
++   IsContained = false;
++ 
++   const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
++   RD = RD ? RD->getDefinition() : nullptr;
++   if (!RD || RD->isInvalidDecl())
++     return nullptr;
++ 
++   if (RD->isDynamicClass())
++     return RD;
++ 
++   // Check all the fields.  If any bases were dynamic, the class is dynamic.
++   // It's impossible for a class to transitively contain itself by value, so
++   // infinite recursion is impossible.
++   for (auto *FD : RD->fields()) {
++     bool SubContained;
++     if (const CXXRecordDecl *ContainedRD =
++             getContainedDynamicClass(FD->getType(), SubContained)) {
++       IsContained = true;
++       return ContainedRD;
++     }
++   }
++ 
++   return nullptr;
++ }
++ 
++ static const UnaryExprOrTypeTraitExpr *getAsSizeOfExpr(const Expr *E) {
++   if (const auto *Unary = dyn_cast<UnaryExprOrTypeTraitExpr>(E))
++     if (Unary->getKind() == UETT_SizeOf)
++       return Unary;
++   return nullptr;
++ }
++ 
++ /// If E is a sizeof expression, returns its argument expression,
++ /// otherwise returns NULL.
++ static const Expr *getSizeOfExprArg(const Expr *E) {
++   if (const UnaryExprOrTypeTraitExpr *SizeOf = getAsSizeOfExpr(E))
++     if (!SizeOf->isArgumentType())
++       return SizeOf->getArgumentExpr()->IgnoreParenImpCasts();
++   return nullptr;
++ }
++ 
++ /// If E is a sizeof expression, returns its argument type.
++ static QualType getSizeOfArgType(const Expr *E) {
++   if (const UnaryExprOrTypeTraitExpr *SizeOf = getAsSizeOfExpr(E))
++     return SizeOf->getTypeOfArgument();
++   return QualType();
++ }
++ 
++ namespace {
++ 
++ struct SearchNonTrivialToInitializeField
++     : DefaultInitializedTypeVisitor<SearchNonTrivialToInitializeField> {
++   using Super =
++       DefaultInitializedTypeVisitor<SearchNonTrivialToInitializeField>;
++ 
++   SearchNonTrivialToInitializeField(const Expr *E, Sema &S) : E(E), S(S) {}
++ 
++   void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType FT,
++                      SourceLocation SL) {
++     if (const auto *AT = asDerived().getContext().getAsArrayType(FT)) {
++       asDerived().visitArray(PDIK, AT, SL);
++       return;
++     }
++ 
++     Super::visitWithKind(PDIK, FT, SL);
++   }
++ 
++   void visitARCStrong(QualType FT, SourceLocation SL) {
++     S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 1);
++   }
++   void visitARCWeak(QualType FT, SourceLocation SL) {
++     S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 1);
++   }
++   void visitStruct(QualType FT, SourceLocation SL) {
++     for (const FieldDecl *FD : FT->castAs<RecordType>()->getDecl()->fields())
++       visit(FD->getType(), FD->getLocation());
++   }
++   void visitArray(QualType::PrimitiveDefaultInitializeKind PDIK,
++                   const ArrayType *AT, SourceLocation SL) {
++     visit(getContext().getBaseElementType(AT), SL);
++   }
++   void visitTrivial(QualType FT, SourceLocation SL) {}
++ 
++   static void diag(QualType RT, const Expr *E, Sema &S) {
++     SearchNonTrivialToInitializeField(E, S).visitStruct(RT, SourceLocation());
++   }
++ 
++   ASTContext &getContext() { return S.getASTContext(); }
++ 
++   const Expr *E;
++   Sema &S;
++ };
++ 
++ struct SearchNonTrivialToCopyField
++     : CopiedTypeVisitor<SearchNonTrivialToCopyField, false> {
++   using Super = CopiedTypeVisitor<SearchNonTrivialToCopyField, false>;
++ 
++   SearchNonTrivialToCopyField(const Expr *E, Sema &S) : E(E), S(S) {}
++ 
++   void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType FT,
++                      SourceLocation SL) {
++     if (const auto *AT = asDerived().getContext().getAsArrayType(FT)) {
++       asDerived().visitArray(PCK, AT, SL);
++       return;
++     }
++ 
++     Super::visitWithKind(PCK, FT, SL);
++   }
++ 
++   void visitARCStrong(QualType FT, SourceLocation SL) {
++     S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 0);
++   }
++   void visitARCWeak(QualType FT, SourceLocation SL) {
++     S.DiagRuntimeBehavior(SL, E, S.PDiag(diag::note_nontrivial_field) << 0);
++   }
++   void visitStruct(QualType FT, SourceLocation SL) {
++     for (const FieldDecl *FD : FT->castAs<RecordType>()->getDecl()->fields())
++       visit(FD->getType(), FD->getLocation());
++   }
++   void visitArray(QualType::PrimitiveCopyKind PCK, const ArrayType *AT,
++                   SourceLocation SL) {
++     visit(getContext().getBaseElementType(AT), SL);
++   }
++   void preVisit(QualType::PrimitiveCopyKind PCK, QualType FT,
++                 SourceLocation SL) {}
++   void visitTrivial(QualType FT, SourceLocation SL) {}
++   void visitVolatileTrivial(QualType FT, SourceLocation SL) {}
++ 
++   static void diag(QualType RT, const Expr *E, Sema &S) {
++     SearchNonTrivialToCopyField(E, S).visitStruct(RT, SourceLocation());
++   }
++ 
++   ASTContext &getContext() { return S.getASTContext(); }
++ 
++   const Expr *E;
++   Sema &S;
++ };
++ 
++ }
++ 
++ /// Detect if \c SizeofExpr is likely to calculate the sizeof an object.
++ static bool doesExprLikelyComputeSize(const Expr *SizeofExpr) {
++   SizeofExpr = SizeofExpr->IgnoreParenImpCasts();
++ 
++   if (const auto *BO = dyn_cast<BinaryOperator>(SizeofExpr)) {
++     if (BO->getOpcode() != BO_Mul && BO->getOpcode() != BO_Add)
++       return false;
++ 
++     return doesExprLikelyComputeSize(BO->getLHS()) ||
++            doesExprLikelyComputeSize(BO->getRHS());
++   }
++ 
++   return getAsSizeOfExpr(SizeofExpr) != nullptr;
++ }
++ 
++ /// Check if the ArgLoc originated from a macro passed to the call at CallLoc.
++ ///
++ /// \code
++ ///   #define MACRO 0
++ ///   foo(MACRO);
++ ///   foo(0);
++ /// \endcode
++ ///
++ /// This should return true for the first call to foo, but not for the second
++ /// (regardless of whether foo is a macro or function).
++ static bool isArgumentExpandedFromMacro(SourceManager &SM,
++                                         SourceLocation CallLoc,
++                                         SourceLocation ArgLoc) {
++   if (!CallLoc.isMacroID())
++     return SM.getFileID(CallLoc) != SM.getFileID(ArgLoc);
++ 
++   return SM.getFileID(SM.getImmediateMacroCallerLoc(CallLoc)) !=
++          SM.getFileID(SM.getImmediateMacroCallerLoc(ArgLoc));
++ }
++ 
++ /// Diagnose cases like 'memset(buf, sizeof(buf), 0)', which should have the
++ /// last two arguments transposed.
++ static void CheckMemaccessSize(Sema &S, unsigned BId, const CallExpr *Call) {
++   if (BId != Builtin::BImemset && BId != Builtin::BIbzero)
++     return;
++ 
++   const Expr *SizeArg =
++     Call->getArg(BId == Builtin::BImemset ? 2 : 1)->IgnoreImpCasts();
++ 
++   auto isLiteralZero = [](const Expr *E) {
++     return isa<IntegerLiteral>(E) && cast<IntegerLiteral>(E)->getValue() == 0;
++   };
++ 
++   // If we're memsetting or bzeroing 0 bytes, then this is likely an error.
++   SourceLocation CallLoc = Call->getRParenLoc();
++   SourceManager &SM = S.getSourceManager();
++   if (isLiteralZero(SizeArg) &&
++       !isArgumentExpandedFromMacro(SM, CallLoc, SizeArg->getExprLoc())) {
++ 
++     SourceLocation DiagLoc = SizeArg->getExprLoc();
++ 
++     // Some platforms #define bzero to __builtin_memset. See if this is the
++     // case, and if so, emit a better diagnostic.
++     if (BId == Builtin::BIbzero ||
++         (CallLoc.isMacroID() && Lexer::getImmediateMacroName(
++                                     CallLoc, SM, S.getLangOpts()) == "bzero")) {
++       S.Diag(DiagLoc, diag::warn_suspicious_bzero_size);
++       S.Diag(DiagLoc, diag::note_suspicious_bzero_size_silence);
++     } else if (!isLiteralZero(Call->getArg(1)->IgnoreImpCasts())) {
++       S.Diag(DiagLoc, diag::warn_suspicious_sizeof_memset) << 0;
++       S.Diag(DiagLoc, diag::note_suspicious_sizeof_memset_silence) << 0;
++     }
++     return;
++   }
++ 
++   // If the second argument to a memset is a sizeof expression and the third
++   // isn't, this is also likely an error. This should catch
++   // 'memset(buf, sizeof(buf), 0xff)'.
++   if (BId == Builtin::BImemset &&
++       doesExprLikelyComputeSize(Call->getArg(1)) &&
++       !doesExprLikelyComputeSize(Call->getArg(2))) {
++     SourceLocation DiagLoc = Call->getArg(1)->getExprLoc();
++     S.Diag(DiagLoc, diag::warn_suspicious_sizeof_memset) << 1;
++     S.Diag(DiagLoc, diag::note_suspicious_sizeof_memset_silence) << 1;
++     return;
++   }
++ }
++ 
++ /// Check for dangerous or invalid arguments to memset().
++ ///
++ /// This issues warnings on known problematic, dangerous or unspecified
++ /// arguments to the standard 'memset', 'memcpy', 'memmove', and 'memcmp'
++ /// function calls.
++ ///
++ /// \param Call The call expression to diagnose.
++ void Sema::CheckMemaccessArguments(const CallExpr *Call,
++                                    unsigned BId,
++                                    IdentifierInfo *FnName) {
++   assert(BId != 0);
++ 
++   // It is possible to have a non-standard definition of memset.  Validate
++   // we have enough arguments, and if not, abort further checking.
++   unsigned ExpectedNumArgs =
++       (BId == Builtin::BIstrndup || BId == Builtin::BIbzero ? 2 : 3);
++   if (Call->getNumArgs() < ExpectedNumArgs)
++     return;
++ 
++   unsigned LastArg = (BId == Builtin::BImemset || BId == Builtin::BIbzero ||
++                       BId == Builtin::BIstrndup ? 1 : 2);
++   unsigned LenArg =
++       (BId == Builtin::BIbzero || BId == Builtin::BIstrndup ? 1 : 2);
++   const Expr *LenExpr = Call->getArg(LenArg)->IgnoreParenImpCasts();
++ 
++   if (CheckMemorySizeofForComparison(*this, LenExpr, FnName,
++                                      Call->getBeginLoc(), Call->getRParenLoc()))
++     return;
++ 
++   // Catch cases like 'memset(buf, sizeof(buf), 0)'.
++   CheckMemaccessSize(*this, BId, Call);
++ 
++   // We have special checking when the length is a sizeof expression.
++   QualType SizeOfArgTy = getSizeOfArgType(LenExpr);
++   const Expr *SizeOfArg = getSizeOfExprArg(LenExpr);
++   llvm::FoldingSetNodeID SizeOfArgID;
++ 
++   // Although widely used, 'bzero' is not a standard function. Be more strict
++   // with the argument types before allowing diagnostics and only allow the
++   // form bzero(ptr, sizeof(...)).
++   QualType FirstArgTy = Call->getArg(0)->IgnoreParenImpCasts()->getType();
++   if (BId == Builtin::BIbzero && !FirstArgTy->getAs<PointerType>())
++     return;
++ 
++   for (unsigned ArgIdx = 0; ArgIdx != LastArg; ++ArgIdx) {
++     const Expr *Dest = Call->getArg(ArgIdx)->IgnoreParenImpCasts();
++     SourceRange ArgRange = Call->getArg(ArgIdx)->getSourceRange();
++ 
++     QualType DestTy = Dest->getType();
++     QualType PointeeTy;
++     if (const PointerType *DestPtrTy = DestTy->getAs<PointerType>()) {
++       PointeeTy = DestPtrTy->getPointeeType();
++ 
++       // Never warn about void type pointers. This can be used to suppress
++       // false positives.
++       if (PointeeTy->isVoidType())
++         continue;
++ 
++       // Catch "memset(p, 0, sizeof(p))" -- needs to be sizeof(*p). Do this by
++       // actually comparing the expressions for equality. Because computing the
++       // expression IDs can be expensive, we only do this if the diagnostic is
++       // enabled.
++       if (SizeOfArg &&
++           !Diags.isIgnored(diag::warn_sizeof_pointer_expr_memaccess,
++                            SizeOfArg->getExprLoc())) {
++         // We only compute IDs for expressions if the warning is enabled, and
++         // cache the sizeof arg's ID.
++         if (SizeOfArgID == llvm::FoldingSetNodeID())
++           SizeOfArg->Profile(SizeOfArgID, Context, true);
++         llvm::FoldingSetNodeID DestID;
++         Dest->Profile(DestID, Context, true);
++         if (DestID == SizeOfArgID) {
++           // TODO: For strncpy() and friends, this could suggest sizeof(dst)
++           //       over sizeof(src) as well.
++           unsigned ActionIdx = 0; // Default is to suggest dereferencing.
++           StringRef ReadableName = FnName->getName();
++ 
++           if (const UnaryOperator *UnaryOp = dyn_cast<UnaryOperator>(Dest))
++             if (UnaryOp->getOpcode() == UO_AddrOf)
++               ActionIdx = 1; // If its an address-of operator, just remove it.
++           if (!PointeeTy->isIncompleteType() &&
++               (Context.getTypeSize(PointeeTy) == Context.getCharWidth()))
++             ActionIdx = 2; // If the pointee's size is sizeof(char),
++                            // suggest an explicit length.
++ 
++           // If the function is defined as a builtin macro, do not show macro
++           // expansion.
++           SourceLocation SL = SizeOfArg->getExprLoc();
++           SourceRange DSR = Dest->getSourceRange();
++           SourceRange SSR = SizeOfArg->getSourceRange();
++           SourceManager &SM = getSourceManager();
++ 
++           if (SM.isMacroArgExpansion(SL)) {
++             ReadableName = Lexer::getImmediateMacroName(SL, SM, LangOpts);
++             SL = SM.getSpellingLoc(SL);
++             DSR = SourceRange(SM.getSpellingLoc(DSR.getBegin()),
++                              SM.getSpellingLoc(DSR.getEnd()));
++             SSR = SourceRange(SM.getSpellingLoc(SSR.getBegin()),
++                              SM.getSpellingLoc(SSR.getEnd()));
++           }
++ 
++           DiagRuntimeBehavior(SL, SizeOfArg,
++                               PDiag(diag::warn_sizeof_pointer_expr_memaccess)
++                                 << ReadableName
++                                 << PointeeTy
++                                 << DestTy
++                                 << DSR
++                                 << SSR);
++           DiagRuntimeBehavior(SL, SizeOfArg,
++                          PDiag(diag::warn_sizeof_pointer_expr_memaccess_note)
++                                 << ActionIdx
++                                 << SSR);
++ 
++           break;
++         }
++       }
++ 
++       // Also check for cases where the sizeof argument is the exact same
++       // type as the memory argument, and where it points to a user-defined
++       // record type.
++       if (SizeOfArgTy != QualType()) {
++         if (PointeeTy->isRecordType() &&
++             Context.typesAreCompatible(SizeOfArgTy, DestTy)) {
++           DiagRuntimeBehavior(LenExpr->getExprLoc(), Dest,
++                               PDiag(diag::warn_sizeof_pointer_type_memaccess)
++                                 << FnName << SizeOfArgTy << ArgIdx
++                                 << PointeeTy << Dest->getSourceRange()
++                                 << LenExpr->getSourceRange());
++           break;
++         }
++       }
++     } else if (DestTy->isArrayType()) {
++       PointeeTy = DestTy;
++     }
++ 
++     if (PointeeTy == QualType())
++       continue;
++ 
++     // Always complain about dynamic classes.
++     bool IsContained;
++     if (const CXXRecordDecl *ContainedRD =
++             getContainedDynamicClass(PointeeTy, IsContained)) {
++ 
++       unsigned OperationType = 0;
++       const bool IsCmp = BId == Builtin::BImemcmp || BId == Builtin::BIbcmp;
++       // "overwritten" if we're warning about the destination for any call
++       // but memcmp; otherwise a verb appropriate to the call.
++       if (ArgIdx != 0 || IsCmp) {
++         if (BId == Builtin::BImemcpy)
++           OperationType = 1;
++         else if(BId == Builtin::BImemmove)
++           OperationType = 2;
++         else if (IsCmp)
++           OperationType = 3;
++       }
++ 
++       DiagRuntimeBehavior(Dest->getExprLoc(), Dest,
++                           PDiag(diag::warn_dyn_class_memaccess)
++                               << (IsCmp ? ArgIdx + 2 : ArgIdx) << FnName
++                               << IsContained << ContainedRD << OperationType
++                               << Call->getCallee()->getSourceRange());
++     } else if (PointeeTy.hasNonTrivialObjCLifetime() &&
++              BId != Builtin::BImemset)
++       DiagRuntimeBehavior(
++         Dest->getExprLoc(), Dest,
++         PDiag(diag::warn_arc_object_memaccess)
++           << ArgIdx << FnName << PointeeTy
++           << Call->getCallee()->getSourceRange());
++     else if (const auto *RT = PointeeTy->getAs<RecordType>()) {
++       if ((BId == Builtin::BImemset || BId == Builtin::BIbzero) &&
++           RT->getDecl()->isNonTrivialToPrimitiveDefaultInitialize()) {
++         DiagRuntimeBehavior(Dest->getExprLoc(), Dest,
++                             PDiag(diag::warn_cstruct_memaccess)
++                                 << ArgIdx << FnName << PointeeTy << 0);
++         SearchNonTrivialToInitializeField::diag(PointeeTy, Dest, *this);
++       } else if ((BId == Builtin::BImemcpy || BId == Builtin::BImemmove) &&
++                  RT->getDecl()->isNonTrivialToPrimitiveCopy()) {
++         DiagRuntimeBehavior(Dest->getExprLoc(), Dest,
++                             PDiag(diag::warn_cstruct_memaccess)
++                                 << ArgIdx << FnName << PointeeTy << 1);
++         SearchNonTrivialToCopyField::diag(PointeeTy, Dest, *this);
++       } else {
++         continue;
++       }
++     } else
++       continue;
++ 
++     DiagRuntimeBehavior(
++       Dest->getExprLoc(), Dest,
++       PDiag(diag::note_bad_memaccess_silence)
++         << FixItHint::CreateInsertion(ArgRange.getBegin(), "(void*)"));
++     break;
++   }
++ }
++ 
++ // A little helper routine: ignore addition and subtraction of integer literals.
++ // This intentionally does not ignore all integer constant expressions because
++ // we don't want to remove sizeof().
++ static const Expr *ignoreLiteralAdditions(const Expr *Ex, ASTContext &Ctx) {
++   Ex = Ex->IgnoreParenCasts();
++ 
++   while (true) {
++     const BinaryOperator * BO = dyn_cast<BinaryOperator>(Ex);
++     if (!BO || !BO->isAdditiveOp())
++       break;
++ 
++     const Expr *RHS = BO->getRHS()->IgnoreParenCasts();
++     const Expr *LHS = BO->getLHS()->IgnoreParenCasts();
++ 
++     if (isa<IntegerLiteral>(RHS))
++       Ex = LHS;
++     else if (isa<IntegerLiteral>(LHS))
++       Ex = RHS;
++     else
++       break;
++   }
++ 
++   return Ex;
++ }
++ 
++ static bool isConstantSizeArrayWithMoreThanOneElement(QualType Ty,
++                                                       ASTContext &Context) {
++   // Only handle constant-sized or VLAs, but not flexible members.
++   if (const ConstantArrayType *CAT = Context.getAsConstantArrayType(Ty)) {
++     // Only issue the FIXIT for arrays of size > 1.
++     if (CAT->getSize().getSExtValue() <= 1)
++       return false;
++   } else if (!Ty->isVariableArrayType()) {
++     return false;
++   }
++   return true;
++ }
++ 
++ // Warn if the user has made the 'size' argument to strlcpy or strlcat
++ // be the size of the source, instead of the destination.
++ void Sema::CheckStrlcpycatArguments(const CallExpr *Call,
++                                     IdentifierInfo *FnName) {
++ 
++   // Don't crash if the user has the wrong number of arguments
++   unsigned NumArgs = Call->getNumArgs();
++   if ((NumArgs != 3) && (NumArgs != 4))
++     return;
++ 
++   const Expr *SrcArg = ignoreLiteralAdditions(Call->getArg(1), Context);
++   const Expr *SizeArg = ignoreLiteralAdditions(Call->getArg(2), Context);
++   const Expr *CompareWithSrc = nullptr;
++ 
++   if (CheckMemorySizeofForComparison(*this, SizeArg, FnName,
++                                      Call->getBeginLoc(), Call->getRParenLoc()))
++     return;
++ 
++   // Look for 'strlcpy(dst, x, sizeof(x))'
++   if (const Expr *Ex = getSizeOfExprArg(SizeArg))
++     CompareWithSrc = Ex;
++   else {
++     // Look for 'strlcpy(dst, x, strlen(x))'
++     if (const CallExpr *SizeCall = dyn_cast<CallExpr>(SizeArg)) {
++       if (SizeCall->getBuiltinCallee() == Builtin::BIstrlen &&
++           SizeCall->getNumArgs() == 1)
++         CompareWithSrc = ignoreLiteralAdditions(SizeCall->getArg(0), Context);
++     }
++   }
++ 
++   if (!CompareWithSrc)
++     return;
++ 
++   // Determine if the argument to sizeof/strlen is equal to the source
++   // argument.  In principle there's all kinds of things you could do
++   // here, for instance creating an == expression and evaluating it with
++   // EvaluateAsBooleanCondition, but this uses a more direct technique:
++   const DeclRefExpr *SrcArgDRE = dyn_cast<DeclRefExpr>(SrcArg);
++   if (!SrcArgDRE)
++     return;
++ 
++   const DeclRefExpr *CompareWithSrcDRE = dyn_cast<DeclRefExpr>(CompareWithSrc);
++   if (!CompareWithSrcDRE ||
++       SrcArgDRE->getDecl() != CompareWithSrcDRE->getDecl())
++     return;
++ 
++   const Expr *OriginalSizeArg = Call->getArg(2);
++   Diag(CompareWithSrcDRE->getBeginLoc(), diag::warn_strlcpycat_wrong_size)
++       << OriginalSizeArg->getSourceRange() << FnName;
++ 
++   // Output a FIXIT hint if the destination is an array (rather than a
++   // pointer to an array).  This could be enhanced to handle some
++   // pointers if we know the actual size, like if DstArg is 'array+2'
++   // we could say 'sizeof(array)-2'.
++   const Expr *DstArg = Call->getArg(0)->IgnoreParenImpCasts();
++   if (!isConstantSizeArrayWithMoreThanOneElement(DstArg->getType(), Context))
++     return;
++ 
++   SmallString<128> sizeString;
++   llvm::raw_svector_ostream OS(sizeString);
++   OS << "sizeof(";
++   DstArg->printPretty(OS, nullptr, getPrintingPolicy());
++   OS << ")";
++ 
++   Diag(OriginalSizeArg->getBeginLoc(), diag::note_strlcpycat_wrong_size)
++       << FixItHint::CreateReplacement(OriginalSizeArg->getSourceRange(),
++                                       OS.str());
++ }
++ 
++ /// Check if two expressions refer to the same declaration.
++ static bool referToTheSameDecl(const Expr *E1, const Expr *E2) {
++   if (const DeclRefExpr *D1 = dyn_cast_or_null<DeclRefExpr>(E1))
++     if (const DeclRefExpr *D2 = dyn_cast_or_null<DeclRefExpr>(E2))
++       return D1->getDecl() == D2->getDecl();
++   return false;
++ }
++ 
++ static const Expr *getStrlenExprArg(const Expr *E) {
++   if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
++     const FunctionDecl *FD = CE->getDirectCallee();
++     if (!FD || FD->getMemoryFunctionKind() != Builtin::BIstrlen)
++       return nullptr;
++     return CE->getArg(0)->IgnoreParenCasts();
++   }
++   return nullptr;
++ }
++ 
++ // Warn on anti-patterns as the 'size' argument to strncat.
++ // The correct size argument should look like following:
++ //   strncat(dst, src, sizeof(dst) - strlen(dest) - 1);
++ void Sema::CheckStrncatArguments(const CallExpr *CE,
++                                  IdentifierInfo *FnName) {
++   // Don't crash if the user has the wrong number of arguments.
++   if (CE->getNumArgs() < 3)
++     return;
++   const Expr *DstArg = CE->getArg(0)->IgnoreParenCasts();
++   const Expr *SrcArg = CE->getArg(1)->IgnoreParenCasts();
++   const Expr *LenArg = CE->getArg(2)->IgnoreParenCasts();
++ 
++   if (CheckMemorySizeofForComparison(*this, LenArg, FnName, CE->getBeginLoc(),
++                                      CE->getRParenLoc()))
++     return;
++ 
++   // Identify common expressions, which are wrongly used as the size argument
++   // to strncat and may lead to buffer overflows.
++   unsigned PatternType = 0;
++   if (const Expr *SizeOfArg = getSizeOfExprArg(LenArg)) {
++     // - sizeof(dst)
++     if (referToTheSameDecl(SizeOfArg, DstArg))
++       PatternType = 1;
++     // - sizeof(src)
++     else if (referToTheSameDecl(SizeOfArg, SrcArg))
++       PatternType = 2;
++   } else if (const BinaryOperator *BE = dyn_cast<BinaryOperator>(LenArg)) {
++     if (BE->getOpcode() == BO_Sub) {
++       const Expr *L = BE->getLHS()->IgnoreParenCasts();
++       const Expr *R = BE->getRHS()->IgnoreParenCasts();
++       // - sizeof(dst) - strlen(dst)
++       if (referToTheSameDecl(DstArg, getSizeOfExprArg(L)) &&
++           referToTheSameDecl(DstArg, getStrlenExprArg(R)))
++         PatternType = 1;
++       // - sizeof(src) - (anything)
++       else if (referToTheSameDecl(SrcArg, getSizeOfExprArg(L)))
++         PatternType = 2;
++     }
++   }
++ 
++   if (PatternType == 0)
++     return;
++ 
++   // Generate the diagnostic.
++   SourceLocation SL = LenArg->getBeginLoc();
++   SourceRange SR = LenArg->getSourceRange();
++   SourceManager &SM = getSourceManager();
++ 
++   // If the function is defined as a builtin macro, do not show macro expansion.
++   if (SM.isMacroArgExpansion(SL)) {
++     SL = SM.getSpellingLoc(SL);
++     SR = SourceRange(SM.getSpellingLoc(SR.getBegin()),
++                      SM.getSpellingLoc(SR.getEnd()));
++   }
++ 
++   // Check if the destination is an array (rather than a pointer to an array).
++   QualType DstTy = DstArg->getType();
++   bool isKnownSizeArray = isConstantSizeArrayWithMoreThanOneElement(DstTy,
++                                                                     Context);
++   if (!isKnownSizeArray) {
++     if (PatternType == 1)
++       Diag(SL, diag::warn_strncat_wrong_size) << SR;
++     else
++       Diag(SL, diag::warn_strncat_src_size) << SR;
++     return;
++   }
++ 
++   if (PatternType == 1)
++     Diag(SL, diag::warn_strncat_large_size) << SR;
++   else
++     Diag(SL, diag::warn_strncat_src_size) << SR;
++ 
++   SmallString<128> sizeString;
++   llvm::raw_svector_ostream OS(sizeString);
++   OS << "sizeof(";
++   DstArg->printPretty(OS, nullptr, getPrintingPolicy());
++   OS << ") - ";
++   OS << "strlen(";
++   DstArg->printPretty(OS, nullptr, getPrintingPolicy());
++   OS << ") - 1";
++ 
++   Diag(SL, diag::note_strncat_wrong_size)
++     << FixItHint::CreateReplacement(SR, OS.str());
++ }
++ 
++ namespace {
++ void CheckFreeArgumentsOnLvalue(Sema &S, const std::string &CalleeName,
++                                 const UnaryOperator *UnaryExpr, const Decl *D) {
++   if (isa<FieldDecl, FunctionDecl, VarDecl>(D)) {
++     S.Diag(UnaryExpr->getBeginLoc(), diag::warn_free_nonheap_object)
++         << CalleeName << 0 /*object: */ << cast<NamedDecl>(D);
++     return;
++   }
++ }
++ 
++ void CheckFreeArgumentsAddressof(Sema &S, const std::string &CalleeName,
++                                  const UnaryOperator *UnaryExpr) {
++   if (const auto *Lvalue = dyn_cast<DeclRefExpr>(UnaryExpr->getSubExpr())) {
++     const Decl *D = Lvalue->getDecl();
++     if (isa<DeclaratorDecl>(D))
++       if (!dyn_cast<DeclaratorDecl>(D)->getType()->isReferenceType())
++         return CheckFreeArgumentsOnLvalue(S, CalleeName, UnaryExpr, D);
++   }
++ 
++   if (const auto *Lvalue = dyn_cast<MemberExpr>(UnaryExpr->getSubExpr()))
++     return CheckFreeArgumentsOnLvalue(S, CalleeName, UnaryExpr,
++                                       Lvalue->getMemberDecl());
++ }
++ 
++ void CheckFreeArgumentsPlus(Sema &S, const std::string &CalleeName,
++                             const UnaryOperator *UnaryExpr) {
++   const auto *Lambda = dyn_cast<LambdaExpr>(
++       UnaryExpr->getSubExpr()->IgnoreImplicitAsWritten()->IgnoreParens());
++   if (!Lambda)
++     return;
++ 
++   S.Diag(Lambda->getBeginLoc(), diag::warn_free_nonheap_object)
++       << CalleeName << 2 /*object: lambda expression*/;
++ }
++ 
++ void CheckFreeArgumentsStackArray(Sema &S, const std::string &CalleeName,
++                                   const DeclRefExpr *Lvalue) {
++   const auto *Var = dyn_cast<VarDecl>(Lvalue->getDecl());
++   if (Var == nullptr)
++     return;
++ 
++   S.Diag(Lvalue->getBeginLoc(), diag::warn_free_nonheap_object)
++       << CalleeName << 0 /*object: */ << Var;
++ }
++ 
++ void CheckFreeArgumentsCast(Sema &S, const std::string &CalleeName,
++                             const CastExpr *Cast) {
++   SmallString<128> SizeString;
++   llvm::raw_svector_ostream OS(SizeString);
++ 
++   clang::CastKind Kind = Cast->getCastKind();
++   if (Kind == clang::CK_BitCast &&
++       !Cast->getSubExpr()->getType()->isFunctionPointerType())
++     return;
++   if (Kind == clang::CK_IntegralToPointer &&
++       !isa<IntegerLiteral>(
++           Cast->getSubExpr()->IgnoreParenImpCasts()->IgnoreParens()))
++     return;
++ 
++   switch (Cast->getCastKind()) {
++   case clang::CK_BitCast:
++   case clang::CK_IntegralToPointer:
++   case clang::CK_FunctionToPointerDecay:
++     OS << '\'';
++     Cast->printPretty(OS, nullptr, S.getPrintingPolicy());
++     OS << '\'';
++     break;
++   default:
++     return;
++   }
++ 
++   S.Diag(Cast->getBeginLoc(), diag::warn_free_nonheap_object)
++       << CalleeName << 0 /*object: */ << OS.str();
++ }
++ } // namespace
++ 
++ /// Alerts the user that they are attempting to free a non-malloc'd object.
++ void Sema::CheckFreeArguments(const CallExpr *E) {
++   const std::string CalleeName =
++       dyn_cast<FunctionDecl>(E->getCalleeDecl())->getQualifiedNameAsString();
++ 
++   { // Prefer something that doesn't involve a cast to make things simpler.
++     const Expr *Arg = E->getArg(0)->IgnoreParenCasts();
++     if (const auto *UnaryExpr = dyn_cast<UnaryOperator>(Arg))
++       switch (UnaryExpr->getOpcode()) {
++       case UnaryOperator::Opcode::UO_AddrOf:
++         return CheckFreeArgumentsAddressof(*this, CalleeName, UnaryExpr);
++       case UnaryOperator::Opcode::UO_Plus:
++         return CheckFreeArgumentsPlus(*this, CalleeName, UnaryExpr);
++       default:
++         break;
++       }
++ 
++     if (const auto *Lvalue = dyn_cast<DeclRefExpr>(Arg))
++       if (Lvalue->getType()->isArrayType())
++         return CheckFreeArgumentsStackArray(*this, CalleeName, Lvalue);
++ 
++     if (const auto *Label = dyn_cast<AddrLabelExpr>(Arg)) {
++       Diag(Label->getBeginLoc(), diag::warn_free_nonheap_object)
++           << CalleeName << 0 /*object: */ << Label->getLabel()->getIdentifier();
++       return;
++     }
++ 
++     if (isa<BlockExpr>(Arg)) {
++       Diag(Arg->getBeginLoc(), diag::warn_free_nonheap_object)
++           << CalleeName << 1 /*object: block*/;
++       return;
++     }
++   }
++   // Maybe the cast was important, check after the other cases.
++   if (const auto *Cast = dyn_cast<CastExpr>(E->getArg(0)))
++     return CheckFreeArgumentsCast(*this, CalleeName, Cast);
++ }
++ 
++ void
++ Sema::CheckReturnValExpr(Expr *RetValExp, QualType lhsType,
++                          SourceLocation ReturnLoc,
++                          bool isObjCMethod,
++                          const AttrVec *Attrs,
++                          const FunctionDecl *FD) {
++   // Check if the return value is null but should not be.
++   if (((Attrs && hasSpecificAttr<ReturnsNonNullAttr>(*Attrs)) ||
++        (!isObjCMethod && isNonNullType(Context, lhsType))) &&
++       CheckNonNullExpr(*this, RetValExp))
++     Diag(ReturnLoc, diag::warn_null_ret)
++       << (isObjCMethod ? 1 : 0) << RetValExp->getSourceRange();
++ 
++   // C++11 [basic.stc.dynamic.allocation]p4:
++   //   If an allocation function declared with a non-throwing
++   //   exception-specification fails to allocate storage, it shall return
++   //   a null pointer. Any other allocation function that fails to allocate
++   //   storage shall indicate failure only by throwing an exception [...]
++   if (FD) {
++     OverloadedOperatorKind Op = FD->getOverloadedOperator();
++     if (Op == OO_New || Op == OO_Array_New) {
++       const FunctionProtoType *Proto
++         = FD->getType()->castAs<FunctionProtoType>();
++       if (!Proto->isNothrow(/*ResultIfDependent*/true) &&
++           CheckNonNullExpr(*this, RetValExp))
++         Diag(ReturnLoc, diag::warn_operator_new_returns_null)
++           << FD << getLangOpts().CPlusPlus11;
++     }
++   }
++ 
++   // PPC MMA non-pointer types are not allowed as return type. Checking the type
++   // here prevent the user from using a PPC MMA type as trailing return type.
++   if (Context.getTargetInfo().getTriple().isPPC64())
++     CheckPPCMMAType(RetValExp->getType(), ReturnLoc);
++ }
++ 
++ //===--- CHECK: Floating-Point comparisons (-Wfloat-equal) ---------------===//
++ 
++ /// Check for comparisons of floating point operands using != and ==.
++ /// Issue a warning if these are no self-comparisons, as they are not likely
++ /// to do what the programmer intended.
++ void Sema::CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr *RHS) {
++   Expr* LeftExprSansParen = LHS->IgnoreParenImpCasts();
++   Expr* RightExprSansParen = RHS->IgnoreParenImpCasts();
++ 
++   // Special case: check for x == x (which is OK).
++   // Do not emit warnings for such cases.
++   if (DeclRefExpr* DRL = dyn_cast<DeclRefExpr>(LeftExprSansParen))
++     if (DeclRefExpr* DRR = dyn_cast<DeclRefExpr>(RightExprSansParen))
++       if (DRL->getDecl() == DRR->getDecl())
++         return;
++ 
++   // Special case: check for comparisons against literals that can be exactly
++   //  represented by APFloat.  In such cases, do not emit a warning.  This
++   //  is a heuristic: often comparison against such literals are used to
++   //  detect if a value in a variable has not changed.  This clearly can
++   //  lead to false negatives.
++   if (FloatingLiteral* FLL = dyn_cast<FloatingLiteral>(LeftExprSansParen)) {
++     if (FLL->isExact())
++       return;
++   } else
++     if (FloatingLiteral* FLR = dyn_cast<FloatingLiteral>(RightExprSansParen))
++       if (FLR->isExact())
++         return;
++ 
++   // Check for comparisons with builtin types.
++   if (CallExpr* CL = dyn_cast<CallExpr>(LeftExprSansParen))
++     if (CL->getBuiltinCallee())
++       return;
++ 
++   if (CallExpr* CR = dyn_cast<CallExpr>(RightExprSansParen))
++     if (CR->getBuiltinCallee())
++       return;
++ 
++   // Emit the diagnostic.
++   Diag(Loc, diag::warn_floatingpoint_eq)
++     << LHS->getSourceRange() << RHS->getSourceRange();
++ }
++ 
++ //===--- CHECK: Integer mixed-sign comparisons (-Wsign-compare) --------===//
++ //===--- CHECK: Lossy implicit conversions (-Wconversion) --------------===//
++ 
++ namespace {
++ 
++ /// Structure recording the 'active' range of an integer-valued
++ /// expression.
++ struct IntRange {
++   /// The number of bits active in the int. Note that this includes exactly one
++   /// sign bit if !NonNegative.
++   unsigned Width;
++ 
++   /// True if the int is known not to have negative values. If so, all leading
++   /// bits before Width are known zero, otherwise they are known to be the
++   /// same as the MSB within Width.
++   bool NonNegative;
++ 
++   IntRange(unsigned Width, bool NonNegative)
++       : Width(Width), NonNegative(NonNegative) {}
++ 
++   /// Number of bits excluding the sign bit.
++   unsigned valueBits() const {
++     return NonNegative ? Width : Width - 1;
++   }
++ 
++   /// Returns the range of the bool type.
++   static IntRange forBoolType() {
++     return IntRange(1, true);
++   }
++ 
++   /// Returns the range of an opaque value of the given integral type.
++   static IntRange forValueOfType(ASTContext &C, QualType T) {
++     return forValueOfCanonicalType(C,
++                           T->getCanonicalTypeInternal().getTypePtr());
++   }
++ 
++   /// Returns the range of an opaque value of a canonical integral type.
++   static IntRange forValueOfCanonicalType(ASTContext &C, const Type *T) {
++     assert(T->isCanonicalUnqualified());
++ 
++     if (const VectorType *VT = dyn_cast<VectorType>(T))
++       T = VT->getElementType().getTypePtr();
++     if (const ComplexType *CT = dyn_cast<ComplexType>(T))
++       T = CT->getElementType().getTypePtr();
++     if (const AtomicType *AT = dyn_cast<AtomicType>(T))
++       T = AT->getValueType().getTypePtr();
++ 
++     if (!C.getLangOpts().CPlusPlus) {
++       // For enum types in C code, use the underlying datatype.
++       if (const EnumType *ET = dyn_cast<EnumType>(T))
++         T = ET->getDecl()->getIntegerType().getDesugaredType(C).getTypePtr();
++     } else if (const EnumType *ET = dyn_cast<EnumType>(T)) {
++       // For enum types in C++, use the known bit width of the enumerators.
++       EnumDecl *Enum = ET->getDecl();
++       // In C++11, enums can have a fixed underlying type. Use this type to
++       // compute the range.
++       if (Enum->isFixed()) {
++         return IntRange(C.getIntWidth(QualType(T, 0)),
++                         !ET->isSignedIntegerOrEnumerationType());
++       }
++ 
++       unsigned NumPositive = Enum->getNumPositiveBits();
++       unsigned NumNegative = Enum->getNumNegativeBits();
++ 
++       if (NumNegative == 0)
++         return IntRange(NumPositive, true/*NonNegative*/);
++       else
++         return IntRange(std::max(NumPositive + 1, NumNegative),
++                         false/*NonNegative*/);
++     }
++ 
++     if (const auto *EIT = dyn_cast<ExtIntType>(T))
++       return IntRange(EIT->getNumBits(), EIT->isUnsigned());
++ 
++     const BuiltinType *BT = cast<BuiltinType>(T);
++     assert(BT->isInteger());
++ 
++     return IntRange(C.getIntWidth(QualType(T, 0)), BT->isUnsignedInteger());
++   }
++ 
++   /// Returns the "target" range of a canonical integral type, i.e.
++   /// the range of values expressible in the type.
++   ///
++   /// This matches forValueOfCanonicalType except that enums have the
++   /// full range of their type, not the range of their enumerators.
++   static IntRange forTargetOfCanonicalType(ASTContext &C, const Type *T) {
++     assert(T->isCanonicalUnqualified());
++ 
++     if (const VectorType *VT = dyn_cast<VectorType>(T))
++       T = VT->getElementType().getTypePtr();
++     if (const ComplexType *CT = dyn_cast<ComplexType>(T))
++       T = CT->getElementType().getTypePtr();
++     if (const AtomicType *AT = dyn_cast<AtomicType>(T))
++       T = AT->getValueType().getTypePtr();
++     if (const EnumType *ET = dyn_cast<EnumType>(T))
++       T = C.getCanonicalType(ET->getDecl()->getIntegerType()).getTypePtr();
++ 
++     if (const auto *EIT = dyn_cast<ExtIntType>(T))
++       return IntRange(EIT->getNumBits(), EIT->isUnsigned());
++ 
++     const BuiltinType *BT = cast<BuiltinType>(T);
++     assert(BT->isInteger());
++ 
++     return IntRange(C.getIntWidth(QualType(T, 0)), BT->isUnsignedInteger());
++   }
++ 
++   /// Returns the supremum of two ranges: i.e. their conservative merge.
++   static IntRange join(IntRange L, IntRange R) {
++     bool Unsigned = L.NonNegative && R.NonNegative;
++     return IntRange(std::max(L.valueBits(), R.valueBits()) + !Unsigned,
++                     L.NonNegative && R.NonNegative);
++   }
++ 
++   /// Return the range of a bitwise-AND of the two ranges.
++   static IntRange bit_and(IntRange L, IntRange R) {
++     unsigned Bits = std::max(L.Width, R.Width);
++     bool NonNegative = false;
++     if (L.NonNegative) {
++       Bits = std::min(Bits, L.Width);
++       NonNegative = true;
++     }
++     if (R.NonNegative) {
++       Bits = std::min(Bits, R.Width);
++       NonNegative = true;
++     }
++     return IntRange(Bits, NonNegative);
++   }
++ 
++   /// Return the range of a sum of the two ranges.
++   static IntRange sum(IntRange L, IntRange R) {
++     bool Unsigned = L.NonNegative && R.NonNegative;
++     return IntRange(std::max(L.valueBits(), R.valueBits()) + 1 + !Unsigned,
++                     Unsigned);
++   }
++ 
++   /// Return the range of a difference of the two ranges.
++   static IntRange difference(IntRange L, IntRange R) {
++     // We need a 1-bit-wider range if:
++     //   1) LHS can be negative: least value can be reduced.
++     //   2) RHS can be negative: greatest value can be increased.
++     bool CanWiden = !L.NonNegative || !R.NonNegative;
++     bool Unsigned = L.NonNegative && R.Width == 0;
++     return IntRange(std::max(L.valueBits(), R.valueBits()) + CanWiden +
++                         !Unsigned,
++                     Unsigned);
++   }
++ 
++   /// Return the range of a product of the two ranges.
++   static IntRange product(IntRange L, IntRange R) {
++     // If both LHS and RHS can be negative, we can form
++     //   -2^L * -2^R = 2^(L + R)
++     // which requires L + R + 1 value bits to represent.
++     bool CanWiden = !L.NonNegative && !R.NonNegative;
++     bool Unsigned = L.NonNegative && R.NonNegative;
++     return IntRange(L.valueBits() + R.valueBits() + CanWiden + !Unsigned,
++                     Unsigned);
++   }
++ 
++   /// Return the range of a remainder operation between the two ranges.
++   static IntRange rem(IntRange L, IntRange R) {
++     // The result of a remainder can't be larger than the result of
++     // either side. The sign of the result is the sign of the LHS.
++     bool Unsigned = L.NonNegative;
++     return IntRange(std::min(L.valueBits(), R.valueBits()) + !Unsigned,
++                     Unsigned);
++   }
++ };
++ 
++ } // namespace
++ 
++ static IntRange GetValueRange(ASTContext &C, llvm::APSInt &value,
++                               unsigned MaxWidth) {
++   if (value.isSigned() && value.isNegative())
++     return IntRange(value.getMinSignedBits(), false);
++ 
++   if (value.getBitWidth() > MaxWidth)
++     value = value.trunc(MaxWidth);
++ 
++   // isNonNegative() just checks the sign bit without considering
++   // signedness.
++   return IntRange(value.getActiveBits(), true);
++ }
++ 
++ static IntRange GetValueRange(ASTContext &C, APValue &result, QualType Ty,
++                               unsigned MaxWidth) {
++   if (result.isInt())
++     return GetValueRange(C, result.getInt(), MaxWidth);
++ 
++   if (result.isVector()) {
++     IntRange R = GetValueRange(C, result.getVectorElt(0), Ty, MaxWidth);
++     for (unsigned i = 1, e = result.getVectorLength(); i != e; ++i) {
++       IntRange El = GetValueRange(C, result.getVectorElt(i), Ty, MaxWidth);
++       R = IntRange::join(R, El);
++     }
++     return R;
++   }
++ 
++   if (result.isComplexInt()) {
++     IntRange R = GetValueRange(C, result.getComplexIntReal(), MaxWidth);
++     IntRange I = GetValueRange(C, result.getComplexIntImag(), MaxWidth);
++     return IntRange::join(R, I);
++   }
++ 
++   // This can happen with lossless casts to intptr_t of "based" lvalues.
++   // Assume it might use arbitrary bits.
++   // FIXME: The only reason we need to pass the type in here is to get
++   // the sign right on this one case.  It would be nice if APValue
++   // preserved this.
++   assert(result.isLValue() || result.isAddrLabelDiff());
++   return IntRange(MaxWidth, Ty->isUnsignedIntegerOrEnumerationType());
++ }
++ 
++ static QualType GetExprType(const Expr *E) {
++   QualType Ty = E->getType();
++   if (const AtomicType *AtomicRHS = Ty->getAs<AtomicType>())
++     Ty = AtomicRHS->getValueType();
++   return Ty;
++ }
++ 
++ /// Pseudo-evaluate the given integer expression, estimating the
++ /// range of values it might take.
++ ///
++ /// \param MaxWidth The width to which the value will be truncated.
++ /// \param Approximate If \c true, return a likely range for the result: in
++ ///        particular, assume that arithmetic on narrower types doesn't leave
++ ///        those types. If \c false, return a range including all possible
++ ///        result values.
++ static IntRange GetExprRange(ASTContext &C, const Expr *E, unsigned MaxWidth,
++                              bool InConstantContext, bool Approximate) {
++   E = E->IgnoreParens();
++ 
++   // Try a full evaluation first.
++   Expr::EvalResult result;
++   if (E->EvaluateAsRValue(result, C, InConstantContext))
++     return GetValueRange(C, result.Val, GetExprType(E), MaxWidth);
++ 
++   // I think we only want to look through implicit casts here; if the
++   // user has an explicit widening cast, we should treat the value as
++   // being of the new, wider type.
++   if (const auto *CE = dyn_cast<ImplicitCastExpr>(E)) {
++     if (CE->getCastKind() == CK_NoOp || CE->getCastKind() == CK_LValueToRValue)
++       return GetExprRange(C, CE->getSubExpr(), MaxWidth, InConstantContext,
++                           Approximate);
++ 
++     IntRange OutputTypeRange = IntRange::forValueOfType(C, GetExprType(CE));
++ 
++     bool isIntegerCast = CE->getCastKind() == CK_IntegralCast ||
++                          CE->getCastKind() == CK_BooleanToSignedIntegral;
++ 
++     // Assume that non-integer casts can span the full range of the type.
++     if (!isIntegerCast)
++       return OutputTypeRange;
++ 
++     IntRange SubRange = GetExprRange(C, CE->getSubExpr(),
++                                      std::min(MaxWidth, OutputTypeRange.Width),
++                                      InConstantContext, Approximate);
++ 
++     // Bail out if the subexpr's range is as wide as the cast type.
++     if (SubRange.Width >= OutputTypeRange.Width)
++       return OutputTypeRange;
++ 
++     // Otherwise, we take the smaller width, and we're non-negative if
++     // either the output type or the subexpr is.
++     return IntRange(SubRange.Width,
++                     SubRange.NonNegative || OutputTypeRange.NonNegative);
++   }
++ 
++   if (const auto *CO = dyn_cast<ConditionalOperator>(E)) {
++     // If we can fold the condition, just take that operand.
++     bool CondResult;
++     if (CO->getCond()->EvaluateAsBooleanCondition(CondResult, C))
++       return GetExprRange(C,
++                           CondResult ? CO->getTrueExpr() : CO->getFalseExpr(),
++                           MaxWidth, InConstantContext, Approximate);
++ 
++     // Otherwise, conservatively merge.
++     // GetExprRange requires an integer expression, but a throw expression
++     // results in a void type.
++     Expr *E = CO->getTrueExpr();
++     IntRange L = E->getType()->isVoidType()
++                      ? IntRange{0, true}
++                      : GetExprRange(C, E, MaxWidth, InConstantContext, Approximate);
++     E = CO->getFalseExpr();
++     IntRange R = E->getType()->isVoidType()
++                      ? IntRange{0, true}
++                      : GetExprRange(C, E, MaxWidth, InConstantContext, Approximate);
++     return IntRange::join(L, R);
++   }
++ 
++   if (const auto *BO = dyn_cast<BinaryOperator>(E)) {
++     IntRange (*Combine)(IntRange, IntRange) = IntRange::join;
++ 
++     switch (BO->getOpcode()) {
++     case BO_Cmp:
++       llvm_unreachable("builtin <=> should have class type");
++ 
++     // Boolean-valued operations are single-bit and positive.
++     case BO_LAnd:
++     case BO_LOr:
++     case BO_LT:
++     case BO_GT:
++     case BO_LE:
++     case BO_GE:
++     case BO_EQ:
++     case BO_NE:
++       return IntRange::forBoolType();
++ 
++     // The type of the assignments is the type of the LHS, so the RHS
++     // is not necessarily the same type.
++     case BO_MulAssign:
++     case BO_DivAssign:
++     case BO_RemAssign:
++     case BO_AddAssign:
++     case BO_SubAssign:
++     case BO_XorAssign:
++     case BO_OrAssign:
++       // TODO: bitfields?
++       return IntRange::forValueOfType(C, GetExprType(E));
++ 
++     // Simple assignments just pass through the RHS, which will have
++     // been coerced to the LHS type.
++     case BO_Assign:
++       // TODO: bitfields?
++       return GetExprRange(C, BO->getRHS(), MaxWidth, InConstantContext,
++                           Approximate);
++ 
++     // Operations with opaque sources are black-listed.
++     case BO_PtrMemD:
++     case BO_PtrMemI:
++       return IntRange::forValueOfType(C, GetExprType(E));
++ 
++     // Bitwise-and uses the *infinum* of the two source ranges.
++     case BO_And:
++     case BO_AndAssign:
++       Combine = IntRange::bit_and;
++       break;
++ 
++     // Left shift gets black-listed based on a judgement call.
++     case BO_Shl:
++       // ...except that we want to treat '1 << (blah)' as logically
++       // positive.  It's an important idiom.
++       if (IntegerLiteral *I
++             = dyn_cast<IntegerLiteral>(BO->getLHS()->IgnoreParenCasts())) {
++         if (I->getValue() == 1) {
++           IntRange R = IntRange::forValueOfType(C, GetExprType(E));
++           return IntRange(R.Width, /*NonNegative*/ true);
++         }
++       }
++       LLVM_FALLTHROUGH;
++ 
++     case BO_ShlAssign:
++       return IntRange::forValueOfType(C, GetExprType(E));
++ 
++     // Right shift by a constant can narrow its left argument.
++     case BO_Shr:
++     case BO_ShrAssign: {
++       IntRange L = GetExprRange(C, BO->getLHS(), MaxWidth, InConstantContext,
++                                 Approximate);
++ 
++       // If the shift amount is a positive constant, drop the width by
++       // that much.
++       if (Optional<llvm::APSInt> shift =
++               BO->getRHS()->getIntegerConstantExpr(C)) {
++         if (shift->isNonNegative()) {
++           unsigned zext = shift->getZExtValue();
++           if (zext >= L.Width)
++             L.Width = (L.NonNegative ? 0 : 1);
++           else
++             L.Width -= zext;
++         }
++       }
++ 
++       return L;
++     }
++ 
++     // Comma acts as its right operand.
++     case BO_Comma:
++       return GetExprRange(C, BO->getRHS(), MaxWidth, InConstantContext,
++                           Approximate);
++ 
++     case BO_Add:
++       if (!Approximate)
++         Combine = IntRange::sum;
++       break;
++ 
++     case BO_Sub:
++       if (BO->getLHS()->getType()->isPointerType())
++         return IntRange::forValueOfType(C, GetExprType(E));
++       if (!Approximate)
++         Combine = IntRange::difference;
++       break;
++ 
++     case BO_Mul:
++       if (!Approximate)
++         Combine = IntRange::product;
++       break;
++ 
++     // The width of a division result is mostly determined by the size
++     // of the LHS.
++     case BO_Div: {
++       // Don't 'pre-truncate' the operands.
++       unsigned opWidth = C.getIntWidth(GetExprType(E));
++       IntRange L = GetExprRange(C, BO->getLHS(), opWidth, InConstantContext,
++                                 Approximate);
++ 
++       // If the divisor is constant, use that.
++       if (Optional<llvm::APSInt> divisor =
++               BO->getRHS()->getIntegerConstantExpr(C)) {
++         unsigned log2 = divisor->logBase2(); // floor(log_2(divisor))
++         if (log2 >= L.Width)
++           L.Width = (L.NonNegative ? 0 : 1);
++         else
++           L.Width = std::min(L.Width - log2, MaxWidth);
++         return L;
++       }
++ 
++       // Otherwise, just use the LHS's width.
++       // FIXME: This is wrong if the LHS could be its minimal value and the RHS
++       // could be -1.
++       IntRange R = GetExprRange(C, BO->getRHS(), opWidth, InConstantContext,
++                                 Approximate);
++       return IntRange(L.Width, L.NonNegative && R.NonNegative);
++     }
++ 
++     case BO_Rem:
++       Combine = IntRange::rem;
++       break;
++ 
++     // The default behavior is okay for these.
++     case BO_Xor:
++     case BO_Or:
++       break;
++     }
++ 
++     // Combine the two ranges, but limit the result to the type in which we
++     // performed the computation.
++     QualType T = GetExprType(E);
++     unsigned opWidth = C.getIntWidth(T);
++     IntRange L =
++         GetExprRange(C, BO->getLHS(), opWidth, InConstantContext, Approximate);
++     IntRange R =
++         GetExprRange(C, BO->getRHS(), opWidth, InConstantContext, Approximate);
++     IntRange C = Combine(L, R);
++     C.NonNegative |= T->isUnsignedIntegerOrEnumerationType();
++     C.Width = std::min(C.Width, MaxWidth);
++     return C;
++   }
++ 
++   if (const auto *UO = dyn_cast<UnaryOperator>(E)) {
++     switch (UO->getOpcode()) {
++     // Boolean-valued operations are white-listed.
++     case UO_LNot:
++       return IntRange::forBoolType();
++ 
++     // Operations with opaque sources are black-listed.
++     case UO_Deref:
++     case UO_AddrOf: // should be impossible
++       return IntRange::forValueOfType(C, GetExprType(E));
++ 
++     default:
++       return GetExprRange(C, UO->getSubExpr(), MaxWidth, InConstantContext,
++                           Approximate);
++     }
++   }
++ 
++   if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E))
++     return GetExprRange(C, OVE->getSourceExpr(), MaxWidth, InConstantContext,
++                         Approximate);
++ 
++   if (const auto *BitField = E->getSourceBitField())
++     return IntRange(BitField->getBitWidthValue(C),
++                     BitField->getType()->isUnsignedIntegerOrEnumerationType());
++ 
++   return IntRange::forValueOfType(C, GetExprType(E));
++ }
++ 
++ static IntRange GetExprRange(ASTContext &C, const Expr *E,
++                              bool InConstantContext, bool Approximate) {
++   return GetExprRange(C, E, C.getIntWidth(GetExprType(E)), InConstantContext,
++                       Approximate);
++ }
++ 
++ /// Checks whether the given value, which currently has the given
++ /// source semantics, has the same value when coerced through the
++ /// target semantics.
++ static bool IsSameFloatAfterCast(const llvm::APFloat &value,
++                                  const llvm::fltSemantics &Src,
++                                  const llvm::fltSemantics &Tgt) {
++   llvm::APFloat truncated = value;
++ 
++   bool ignored;
++   truncated.convert(Src, llvm::APFloat::rmNearestTiesToEven, &ignored);
++   truncated.convert(Tgt, llvm::APFloat::rmNearestTiesToEven, &ignored);
++ 
++   return truncated.bitwiseIsEqual(value);
++ }
++ 
++ /// Checks whether the given value, which currently has the given
++ /// source semantics, has the same value when coerced through the
++ /// target semantics.
++ ///
++ /// The value might be a vector of floats (or a complex number).
++ static bool IsSameFloatAfterCast(const APValue &value,
++                                  const llvm::fltSemantics &Src,
++                                  const llvm::fltSemantics &Tgt) {
++   if (value.isFloat())
++     return IsSameFloatAfterCast(value.getFloat(), Src, Tgt);
++ 
++   if (value.isVector()) {
++     for (unsigned i = 0, e = value.getVectorLength(); i != e; ++i)
++       if (!IsSameFloatAfterCast(value.getVectorElt(i), Src, Tgt))
++         return false;
++     return true;
++   }
++ 
++   assert(value.isComplexFloat());
++   return (IsSameFloatAfterCast(value.getComplexFloatReal(), Src, Tgt) &&
++           IsSameFloatAfterCast(value.getComplexFloatImag(), Src, Tgt));
++ }
++ 
++ static void AnalyzeImplicitConversions(Sema &S, Expr *E, SourceLocation CC,
++                                        bool IsListInit = false);
++ 
++ static bool IsEnumConstOrFromMacro(Sema &S, Expr *E) {
++   // Suppress cases where we are comparing against an enum constant.
++   if (const DeclRefExpr *DR =
++       dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()))
++     if (isa<EnumConstantDecl>(DR->getDecl()))
++       return true;
++ 
++   // Suppress cases where the value is expanded from a macro, unless that macro
++   // is how a language represents a boolean literal. This is the case in both C
++   // and Objective-C.
++   SourceLocation BeginLoc = E->getBeginLoc();
++   if (BeginLoc.isMacroID()) {
++     StringRef MacroName = Lexer::getImmediateMacroName(
++         BeginLoc, S.getSourceManager(), S.getLangOpts());
++     return MacroName != "YES" && MacroName != "NO" &&
++            MacroName != "true" && MacroName != "false";
++   }
++ 
++   return false;
++ }
++ 
++ static bool isKnownToHaveUnsignedValue(Expr *E) {
++   return E->getType()->isIntegerType() &&
++          (!E->getType()->isSignedIntegerType() ||
++           !E->IgnoreParenImpCasts()->getType()->isSignedIntegerType());
++ }
++ 
++ namespace {
++ /// The promoted range of values of a type. In general this has the
++ /// following structure:
++ ///
++ ///     |-----------| . . . |-----------|
++ ///     ^           ^       ^           ^
++ ///    Min       HoleMin  HoleMax      Max
++ ///
++ /// ... where there is only a hole if a signed type is promoted to unsigned
++ /// (in which case Min and Max are the smallest and largest representable
++ /// values).
++ struct PromotedRange {
++   // Min, or HoleMax if there is a hole.
++   llvm::APSInt PromotedMin;
++   // Max, or HoleMin if there is a hole.
++   llvm::APSInt PromotedMax;
++ 
++   PromotedRange(IntRange R, unsigned BitWidth, bool Unsigned) {
++     if (R.Width == 0)
++       PromotedMin = PromotedMax = llvm::APSInt(BitWidth, Unsigned);
++     else if (R.Width >= BitWidth && !Unsigned) {
++       // Promotion made the type *narrower*. This happens when promoting
++       // a < 32-bit unsigned / <= 32-bit signed bit-field to 'signed int'.
++       // Treat all values of 'signed int' as being in range for now.
++       PromotedMin = llvm::APSInt::getMinValue(BitWidth, Unsigned);
++       PromotedMax = llvm::APSInt::getMaxValue(BitWidth, Unsigned);
++     } else {
++       PromotedMin = llvm::APSInt::getMinValue(R.Width, R.NonNegative)
++                         .extOrTrunc(BitWidth);
++       PromotedMin.setIsUnsigned(Unsigned);
++ 
++       PromotedMax = llvm::APSInt::getMaxValue(R.Width, R.NonNegative)
++                         .extOrTrunc(BitWidth);
++       PromotedMax.setIsUnsigned(Unsigned);
++     }
++   }
++ 
++   // Determine whether this range is contiguous (has no hole).
++   bool isContiguous() const { return PromotedMin <= PromotedMax; }
++ 
++   // Where a constant value is within the range.
++   enum ComparisonResult {
++     LT = 0x1,
++     LE = 0x2,
++     GT = 0x4,
++     GE = 0x8,
++     EQ = 0x10,
++     NE = 0x20,
++     InRangeFlag = 0x40,
++ 
++     Less = LE | LT | NE,
++     Min = LE | InRangeFlag,
++     InRange = InRangeFlag,
++     Max = GE | InRangeFlag,
++     Greater = GE | GT | NE,
++ 
++     OnlyValue = LE | GE | EQ | InRangeFlag,
++     InHole = NE
++   };
++ 
++   ComparisonResult compare(const llvm::APSInt &Value) const {
++     assert(Value.getBitWidth() == PromotedMin.getBitWidth() &&
++            Value.isUnsigned() == PromotedMin.isUnsigned());
++     if (!isContiguous()) {
++       assert(Value.isUnsigned() && "discontiguous range for signed compare");
++       if (Value.isMinValue()) return Min;
++       if (Value.isMaxValue()) return Max;
++       if (Value >= PromotedMin) return InRange;
++       if (Value <= PromotedMax) return InRange;
++       return InHole;
++     }
++ 
++     switch (llvm::APSInt::compareValues(Value, PromotedMin)) {
++     case -1: return Less;
++     case 0: return PromotedMin == PromotedMax ? OnlyValue : Min;
++     case 1:
++       switch (llvm::APSInt::compareValues(Value, PromotedMax)) {
++       case -1: return InRange;
++       case 0: return Max;
++       case 1: return Greater;
++       }
++     }
++ 
++     llvm_unreachable("impossible compare result");
++   }
++ 
++   static llvm::Optional<StringRef>
++   constantValue(BinaryOperatorKind Op, ComparisonResult R, bool ConstantOnRHS) {
++     if (Op == BO_Cmp) {
++       ComparisonResult LTFlag = LT, GTFlag = GT;
++       if (ConstantOnRHS) std::swap(LTFlag, GTFlag);
++ 
++       if (R & EQ) return StringRef("'std::strong_ordering::equal'");
++       if (R & LTFlag) return StringRef("'std::strong_ordering::less'");
++       if (R & GTFlag) return StringRef("'std::strong_ordering::greater'");
++       return llvm::None;
++     }
++ 
++     ComparisonResult TrueFlag, FalseFlag;
++     if (Op == BO_EQ) {
++       TrueFlag = EQ;
++       FalseFlag = NE;
++     } else if (Op == BO_NE) {
++       TrueFlag = NE;
++       FalseFlag = EQ;
++     } else {
++       if ((Op == BO_LT || Op == BO_GE) ^ ConstantOnRHS) {
++         TrueFlag = LT;
++         FalseFlag = GE;
++       } else {
++         TrueFlag = GT;
++         FalseFlag = LE;
++       }
++       if (Op == BO_GE || Op == BO_LE)
++         std::swap(TrueFlag, FalseFlag);
++     }
++     if (R & TrueFlag)
++       return StringRef("true");
++     if (R & FalseFlag)
++       return StringRef("false");
++     return llvm::None;
++   }
++ };
++ }
++ 
++ static bool HasEnumType(Expr *E) {
++   // Strip off implicit integral promotions.
++   while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
++     if (ICE->getCastKind() != CK_IntegralCast &&
++         ICE->getCastKind() != CK_NoOp)
++       break;
++     E = ICE->getSubExpr();
++   }
++ 
++   return E->getType()->isEnumeralType();
++ }
++ 
++ static int classifyConstantValue(Expr *Constant) {
++   // The values of this enumeration are used in the diagnostics
++   // diag::warn_out_of_range_compare and diag::warn_tautological_bool_compare.
++   enum ConstantValueKind {
++     Miscellaneous = 0,
++     LiteralTrue,
++     LiteralFalse
++   };
++   if (auto *BL = dyn_cast<CXXBoolLiteralExpr>(Constant))
++     return BL->getValue() ? ConstantValueKind::LiteralTrue
++                           : ConstantValueKind::LiteralFalse;
++   return ConstantValueKind::Miscellaneous;
++ }
++ 
++ static bool CheckTautologicalComparison(Sema &S, BinaryOperator *E,
++                                         Expr *Constant, Expr *Other,
++                                         const llvm::APSInt &Value,
++                                         bool RhsConstant) {
++   if (S.inTemplateInstantiation())
++     return false;
++ 
++   Expr *OriginalOther = Other;
++ 
++   Constant = Constant->IgnoreParenImpCasts();
++   Other = Other->IgnoreParenImpCasts();
++ 
++   // Suppress warnings on tautological comparisons between values of the same
++   // enumeration type. There are only two ways we could warn on this:
++   //  - If the constant is outside the range of representable values of
++   //    the enumeration. In such a case, we should warn about the cast
++   //    to enumeration type, not about the comparison.
++   //  - If the constant is the maximum / minimum in-range value. For an
++   //    enumeratin type, such comparisons can be meaningful and useful.
++   if (Constant->getType()->isEnumeralType() &&
++       S.Context.hasSameUnqualifiedType(Constant->getType(), Other->getType()))
++     return false;
++ 
++   IntRange OtherValueRange = GetExprRange(
++       S.Context, Other, S.isConstantEvaluated(), /*Approximate*/ false);
++ 
++   QualType OtherT = Other->getType();
++   if (const auto *AT = OtherT->getAs<AtomicType>())
++     OtherT = AT->getValueType();
++   IntRange OtherTypeRange = IntRange::forValueOfType(S.Context, OtherT);
++ 
++   // Special case for ObjC BOOL on targets where its a typedef for a signed char
++   // (Namely, macOS). FIXME: IntRange::forValueOfType should do this.
++   bool IsObjCSignedCharBool = S.getLangOpts().ObjC &&
++                               S.NSAPIObj->isObjCBOOLType(OtherT) &&
++                               OtherT->isSpecificBuiltinType(BuiltinType::SChar);
++ 
++   // Whether we're treating Other as being a bool because of the form of
++   // expression despite it having another type (typically 'int' in C).
++   bool OtherIsBooleanDespiteType =
++       !OtherT->isBooleanType() && Other->isKnownToHaveBooleanValue();
++   if (OtherIsBooleanDespiteType || IsObjCSignedCharBool)
++     OtherTypeRange = OtherValueRange = IntRange::forBoolType();
++ 
++   // Check if all values in the range of possible values of this expression
++   // lead to the same comparison outcome.
++   PromotedRange OtherPromotedValueRange(OtherValueRange, Value.getBitWidth(),
++                                         Value.isUnsigned());
++   auto Cmp = OtherPromotedValueRange.compare(Value);
++   auto Result = PromotedRange::constantValue(E->getOpcode(), Cmp, RhsConstant);
++   if (!Result)
++     return false;
++ 
++   // Also consider the range determined by the type alone. This allows us to
++   // classify the warning under the proper diagnostic group.
++   bool TautologicalTypeCompare = false;
++   {
++     PromotedRange OtherPromotedTypeRange(OtherTypeRange, Value.getBitWidth(),
++                                          Value.isUnsigned());
++     auto TypeCmp = OtherPromotedTypeRange.compare(Value);
++     if (auto TypeResult = PromotedRange::constantValue(E->getOpcode(), TypeCmp,
++                                                        RhsConstant)) {
++       TautologicalTypeCompare = true;
++       Cmp = TypeCmp;
++       Result = TypeResult;
++     }
++   }
++ 
++   // Don't warn if the non-constant operand actually always evaluates to the
++   // same value.
++   if (!TautologicalTypeCompare && OtherValueRange.Width == 0)
++     return false;
++ 
++   // Suppress the diagnostic for an in-range comparison if the constant comes
++   // from a macro or enumerator. We don't want to diagnose
++   //
++   //   some_long_value <= INT_MAX
++   //
++   // when sizeof(int) == sizeof(long).
++   bool InRange = Cmp & PromotedRange::InRangeFlag;
++   if (InRange && IsEnumConstOrFromMacro(S, Constant))
++     return false;
++ 
++   // A comparison of an unsigned bit-field against 0 is really a type problem,
++   // even though at the type level the bit-field might promote to 'signed int'.
++   if (Other->refersToBitField() && InRange && Value == 0 &&
++       Other->getType()->isUnsignedIntegerOrEnumerationType())
++     TautologicalTypeCompare = true;
++ 
++   // If this is a comparison to an enum constant, include that
++   // constant in the diagnostic.
++   const EnumConstantDecl *ED = nullptr;
++   if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(Constant))
++     ED = dyn_cast<EnumConstantDecl>(DR->getDecl());
++ 
++   // Should be enough for uint128 (39 decimal digits)
++   SmallString<64> PrettySourceValue;
++   llvm::raw_svector_ostream OS(PrettySourceValue);
++   if (ED) {
++     OS << '\'' << *ED << "' (" << Value << ")";
++   } else if (auto *BL = dyn_cast<ObjCBoolLiteralExpr>(
++                Constant->IgnoreParenImpCasts())) {
++     OS << (BL->getValue() ? "YES" : "NO");
++   } else {
++     OS << Value;
++   }
++ 
++   if (!TautologicalTypeCompare) {
++     S.Diag(E->getOperatorLoc(), diag::warn_tautological_compare_value_range)
++         << RhsConstant << OtherValueRange.Width << OtherValueRange.NonNegative
++         << E->getOpcodeStr() << OS.str() << *Result
++         << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
++     return true;
++   }
++ 
++   if (IsObjCSignedCharBool) {
++     S.DiagRuntimeBehavior(E->getOperatorLoc(), E,
++                           S.PDiag(diag::warn_tautological_compare_objc_bool)
++                               << OS.str() << *Result);
++     return true;
++   }
++ 
++   // FIXME: We use a somewhat different formatting for the in-range cases and
++   // cases involving boolean values for historical reasons. We should pick a
++   // consistent way of presenting these diagnostics.
++   if (!InRange || Other->isKnownToHaveBooleanValue()) {
++ 
++     S.DiagRuntimeBehavior(
++         E->getOperatorLoc(), E,
++         S.PDiag(!InRange ? diag::warn_out_of_range_compare
++                          : diag::warn_tautological_bool_compare)
++             << OS.str() << classifyConstantValue(Constant) << OtherT
++             << OtherIsBooleanDespiteType << *Result
++             << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange());
++   } else {
++     bool IsCharTy = OtherT.withoutLocalFastQualifiers() == S.Context.CharTy;
++     unsigned Diag =
++         (isKnownToHaveUnsignedValue(OriginalOther) && Value == 0)
++             ? (HasEnumType(OriginalOther)
++                    ? diag::warn_unsigned_enum_always_true_comparison
++                    : IsCharTy ? diag::warn_unsigned_char_always_true_comparison
++                               : diag::warn_unsigned_always_true_comparison)
++             : diag::warn_tautological_constant_compare;
++ 
++     S.Diag(E->getOperatorLoc(), Diag)
++         << RhsConstant << OtherT << E->getOpcodeStr() << OS.str() << *Result
++         << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
++   }
++ 
++   return true;
++ }
++ 
++ /// Analyze the operands of the given comparison.  Implements the
++ /// fallback case from AnalyzeComparison.
++ static void AnalyzeImpConvsInComparison(Sema &S, BinaryOperator *E) {
++   AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
++   AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
++ }
++ 
++ /// Implements -Wsign-compare.
++ ///
++ /// \param E the binary operator to check for warnings
++ static void AnalyzeComparison(Sema &S, BinaryOperator *E) {
++   // The type the comparison is being performed in.
++   QualType T = E->getLHS()->getType();
++ 
++   // Only analyze comparison operators where both sides have been converted to
++   // the same type.
++   if (!S.Context.hasSameUnqualifiedType(T, E->getRHS()->getType()))
++     return AnalyzeImpConvsInComparison(S, E);
++ 
++   // Don't analyze value-dependent comparisons directly.
++   if (E->isValueDependent())
++     return AnalyzeImpConvsInComparison(S, E);
++ 
++   Expr *LHS = E->getLHS();
++   Expr *RHS = E->getRHS();
++ 
++   if (T->isIntegralType(S.Context)) {
++     Optional<llvm::APSInt> RHSValue = RHS->getIntegerConstantExpr(S.Context);
++     Optional<llvm::APSInt> LHSValue = LHS->getIntegerConstantExpr(S.Context);
++ 
++     // We don't care about expressions whose result is a constant.
++     if (RHSValue && LHSValue)
++       return AnalyzeImpConvsInComparison(S, E);
++ 
++     // We only care about expressions where just one side is literal
++     if ((bool)RHSValue ^ (bool)LHSValue) {
++       // Is the constant on the RHS or LHS?
++       const bool RhsConstant = (bool)RHSValue;
++       Expr *Const = RhsConstant ? RHS : LHS;
++       Expr *Other = RhsConstant ? LHS : RHS;
++       const llvm::APSInt &Value = RhsConstant ? *RHSValue : *LHSValue;
++ 
++       // Check whether an integer constant comparison results in a value
++       // of 'true' or 'false'.
++       if (CheckTautologicalComparison(S, E, Const, Other, Value, RhsConstant))
++         return AnalyzeImpConvsInComparison(S, E);
++     }
++   }
++ 
++   if (!T->hasUnsignedIntegerRepresentation()) {
++     // We don't do anything special if this isn't an unsigned integral
++     // comparison:  we're only interested in integral comparisons, and
++     // signed comparisons only happen in cases we don't care to warn about.
++     return AnalyzeImpConvsInComparison(S, E);
++   }
++ 
++   LHS = LHS->IgnoreParenImpCasts();
++   RHS = RHS->IgnoreParenImpCasts();
++ 
++   if (!S.getLangOpts().CPlusPlus) {
++     // Avoid warning about comparison of integers with different signs when
++     // RHS/LHS has a `typeof(E)` type whose sign is different from the sign of
++     // the type of `E`.
++     if (const auto *TET = dyn_cast<TypeOfExprType>(LHS->getType()))
++       LHS = TET->getUnderlyingExpr()->IgnoreParenImpCasts();
++     if (const auto *TET = dyn_cast<TypeOfExprType>(RHS->getType()))
++       RHS = TET->getUnderlyingExpr()->IgnoreParenImpCasts();
++   }
++ 
++   // Check to see if one of the (unmodified) operands is of different
++   // signedness.
++   Expr *signedOperand, *unsignedOperand;
++   if (LHS->getType()->hasSignedIntegerRepresentation()) {
++     assert(!RHS->getType()->hasSignedIntegerRepresentation() &&
++            "unsigned comparison between two signed integer expressions?");
++     signedOperand = LHS;
++     unsignedOperand = RHS;
++   } else if (RHS->getType()->hasSignedIntegerRepresentation()) {
++     signedOperand = RHS;
++     unsignedOperand = LHS;
++   } else {
++     return AnalyzeImpConvsInComparison(S, E);
++   }
++ 
++   // Otherwise, calculate the effective range of the signed operand.
++   IntRange signedRange = GetExprRange(
++       S.Context, signedOperand, S.isConstantEvaluated(), /*Approximate*/ true);
++ 
++   // Go ahead and analyze implicit conversions in the operands.  Note
++   // that we skip the implicit conversions on both sides.
++   AnalyzeImplicitConversions(S, LHS, E->getOperatorLoc());
++   AnalyzeImplicitConversions(S, RHS, E->getOperatorLoc());
++ 
++   // If the signed range is non-negative, -Wsign-compare won't fire.
++   if (signedRange.NonNegative)
++     return;
++ 
++   // For (in)equality comparisons, if the unsigned operand is a
++   // constant which cannot collide with a overflowed signed operand,
++   // then reinterpreting the signed operand as unsigned will not
++   // change the result of the comparison.
++   if (E->isEqualityOp()) {
++     unsigned comparisonWidth = S.Context.getIntWidth(T);
++     IntRange unsignedRange =
++         GetExprRange(S.Context, unsignedOperand, S.isConstantEvaluated(),
++                      /*Approximate*/ true);
++ 
++     // We should never be unable to prove that the unsigned operand is
++     // non-negative.
++     assert(unsignedRange.NonNegative && "unsigned range includes negative?");
++ 
++     if (unsignedRange.Width < comparisonWidth)
++       return;
++   }
++ 
++   S.DiagRuntimeBehavior(E->getOperatorLoc(), E,
++                         S.PDiag(diag::warn_mixed_sign_comparison)
++                             << LHS->getType() << RHS->getType()
++                             << LHS->getSourceRange() << RHS->getSourceRange());
++ }
++ 
++ /// Analyzes an attempt to assign the given value to a bitfield.
++ ///
++ /// Returns true if there was something fishy about the attempt.
++ static bool AnalyzeBitFieldAssignment(Sema &S, FieldDecl *Bitfield, Expr *Init,
++                                       SourceLocation InitLoc) {
++   assert(Bitfield->isBitField());
++   if (Bitfield->isInvalidDecl())
++     return false;
++ 
++   // White-list bool bitfields.
++   QualType BitfieldType = Bitfield->getType();
++   if (BitfieldType->isBooleanType())
++      return false;
++ 
++   if (BitfieldType->isEnumeralType()) {
++     EnumDecl *BitfieldEnumDecl = BitfieldType->castAs<EnumType>()->getDecl();
++     // If the underlying enum type was not explicitly specified as an unsigned
++     // type and the enum contain only positive values, MSVC++ will cause an
++     // inconsistency by storing this as a signed type.
++     if (S.getLangOpts().CPlusPlus11 &&
++         !BitfieldEnumDecl->getIntegerTypeSourceInfo() &&
++         BitfieldEnumDecl->getNumPositiveBits() > 0 &&
++         BitfieldEnumDecl->getNumNegativeBits() == 0) {
++       S.Diag(InitLoc, diag::warn_no_underlying_type_specified_for_enum_bitfield)
++           << BitfieldEnumDecl;
++     }
++   }
++ 
++   if (Bitfield->getType()->isBooleanType())
++     return false;
++ 
++   // Ignore value- or type-dependent expressions.
++   if (Bitfield->getBitWidth()->isValueDependent() ||
++       Bitfield->getBitWidth()->isTypeDependent() ||
++       Init->isValueDependent() ||
++       Init->isTypeDependent())
++     return false;
++ 
++   Expr *OriginalInit = Init->IgnoreParenImpCasts();
++   unsigned FieldWidth = Bitfield->getBitWidthValue(S.Context);
++ 
++   Expr::EvalResult Result;
++   if (!OriginalInit->EvaluateAsInt(Result, S.Context,
++                                    Expr::SE_AllowSideEffects)) {
++     // The RHS is not constant.  If the RHS has an enum type, make sure the
++     // bitfield is wide enough to hold all the values of the enum without
++     // truncation.
++     if (const auto *EnumTy = OriginalInit->getType()->getAs<EnumType>()) {
++       EnumDecl *ED = EnumTy->getDecl();
++       bool SignedBitfield = BitfieldType->isSignedIntegerType();
++ 
++       // Enum types are implicitly signed on Windows, so check if there are any
++       // negative enumerators to see if the enum was intended to be signed or
++       // not.
++       bool SignedEnum = ED->getNumNegativeBits() > 0;
++ 
++       // Check for surprising sign changes when assigning enum values to a
++       // bitfield of different signedness.  If the bitfield is signed and we
++       // have exactly the right number of bits to store this unsigned enum,
++       // suggest changing the enum to an unsigned type. This typically happens
++       // on Windows where unfixed enums always use an underlying type of 'int'.
++       unsigned DiagID = 0;
++       if (SignedEnum && !SignedBitfield) {
++         DiagID = diag::warn_unsigned_bitfield_assigned_signed_enum;
++       } else if (SignedBitfield && !SignedEnum &&
++                  ED->getNumPositiveBits() == FieldWidth) {
++         DiagID = diag::warn_signed_bitfield_enum_conversion;
++       }
++ 
++       if (DiagID) {
++         S.Diag(InitLoc, DiagID) << Bitfield << ED;
++         TypeSourceInfo *TSI = Bitfield->getTypeSourceInfo();
++         SourceRange TypeRange =
++             TSI ? TSI->getTypeLoc().getSourceRange() : SourceRange();
++         S.Diag(Bitfield->getTypeSpecStartLoc(), diag::note_change_bitfield_sign)
++             << SignedEnum << TypeRange;
++       }
++ 
++       // Compute the required bitwidth. If the enum has negative values, we need
++       // one more bit than the normal number of positive bits to represent the
++       // sign bit.
++       unsigned BitsNeeded = SignedEnum ? std::max(ED->getNumPositiveBits() + 1,
++                                                   ED->getNumNegativeBits())
++                                        : ED->getNumPositiveBits();
++ 
++       // Check the bitwidth.
++       if (BitsNeeded > FieldWidth) {
++         Expr *WidthExpr = Bitfield->getBitWidth();
++         S.Diag(InitLoc, diag::warn_bitfield_too_small_for_enum)
++             << Bitfield << ED;
++         S.Diag(WidthExpr->getExprLoc(), diag::note_widen_bitfield)
++             << BitsNeeded << ED << WidthExpr->getSourceRange();
++       }
++     }
++ 
++     return false;
++   }
++ 
++   llvm::APSInt Value = Result.Val.getInt();
++ 
++   unsigned OriginalWidth = Value.getBitWidth();
++ 
++   if (!Value.isSigned() || Value.isNegative())
++     if (UnaryOperator *UO = dyn_cast<UnaryOperator>(OriginalInit))
++       if (UO->getOpcode() == UO_Minus || UO->getOpcode() == UO_Not)
++         OriginalWidth = Value.getMinSignedBits();
++ 
++   if (OriginalWidth <= FieldWidth)
++     return false;
++ 
++   // Compute the value which the bitfield will contain.
++   llvm::APSInt TruncatedValue = Value.trunc(FieldWidth);
++   TruncatedValue.setIsSigned(BitfieldType->isSignedIntegerType());
++ 
++   // Check whether the stored value is equal to the original value.
++   TruncatedValue = TruncatedValue.extend(OriginalWidth);
++   if (llvm::APSInt::isSameValue(Value, TruncatedValue))
++     return false;
++ 
++   // Special-case bitfields of width 1: booleans are naturally 0/1, and
++   // therefore don't strictly fit into a signed bitfield of width 1.
++   if (FieldWidth == 1 && Value == 1)
++     return false;
++ 
++   std::string PrettyValue = toString(Value, 10);
++   std::string PrettyTrunc = toString(TruncatedValue, 10);
++ 
++   S.Diag(InitLoc, diag::warn_impcast_bitfield_precision_constant)
++     << PrettyValue << PrettyTrunc << OriginalInit->getType()
++     << Init->getSourceRange();
++ 
++   return true;
++ }
++ 
++ /// Analyze the given simple or compound assignment for warning-worthy
++ /// operations.
++ static void AnalyzeAssignment(Sema &S, BinaryOperator *E) {
++   // Just recurse on the LHS.
++   AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
++ 
++   // We want to recurse on the RHS as normal unless we're assigning to
++   // a bitfield.
++   if (FieldDecl *Bitfield = E->getLHS()->getSourceBitField()) {
++     if (AnalyzeBitFieldAssignment(S, Bitfield, E->getRHS(),
++                                   E->getOperatorLoc())) {
++       // Recurse, ignoring any implicit conversions on the RHS.
++       return AnalyzeImplicitConversions(S, E->getRHS()->IgnoreParenImpCasts(),
++                                         E->getOperatorLoc());
++     }
++   }
++ 
++   AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
++ 
++   // Diagnose implicitly sequentially-consistent atomic assignment.
++   if (E->getLHS()->getType()->isAtomicType())
++     S.Diag(E->getRHS()->getBeginLoc(), diag::warn_atomic_implicit_seq_cst);
++ }
++ 
++ /// Diagnose an implicit cast;  purely a helper for CheckImplicitConversion.
++ static void DiagnoseImpCast(Sema &S, Expr *E, QualType SourceType, QualType T,
++                             SourceLocation CContext, unsigned diag,
++                             bool pruneControlFlow = false) {
++   if (pruneControlFlow) {
++     S.DiagRuntimeBehavior(E->getExprLoc(), E,
++                           S.PDiag(diag)
++                               << SourceType << T << E->getSourceRange()
++                               << SourceRange(CContext));
++     return;
++   }
++   S.Diag(E->getExprLoc(), diag)
++     << SourceType << T << E->getSourceRange() << SourceRange(CContext);
++ }
++ 
++ /// Diagnose an implicit cast;  purely a helper for CheckImplicitConversion.
++ static void DiagnoseImpCast(Sema &S, Expr *E, QualType T,
++                             SourceLocation CContext,
++                             unsigned diag, bool pruneControlFlow = false) {
++   DiagnoseImpCast(S, E, E->getType(), T, CContext, diag, pruneControlFlow);
++ }
++ 
++ static bool isObjCSignedCharBool(Sema &S, QualType Ty) {
++   return Ty->isSpecificBuiltinType(BuiltinType::SChar) &&
++       S.getLangOpts().ObjC && S.NSAPIObj->isObjCBOOLType(Ty);
++ }
++ 
++ static void adornObjCBoolConversionDiagWithTernaryFixit(
++     Sema &S, Expr *SourceExpr, const Sema::SemaDiagnosticBuilder &Builder) {
++   Expr *Ignored = SourceExpr->IgnoreImplicit();
++   if (const auto *OVE = dyn_cast<OpaqueValueExpr>(Ignored))
++     Ignored = OVE->getSourceExpr();
++   bool NeedsParens = isa<AbstractConditionalOperator>(Ignored) ||
++                      isa<BinaryOperator>(Ignored) ||
++                      isa<CXXOperatorCallExpr>(Ignored);
++   SourceLocation EndLoc = S.getLocForEndOfToken(SourceExpr->getEndLoc());
++   if (NeedsParens)
++     Builder << FixItHint::CreateInsertion(SourceExpr->getBeginLoc(), "(")
++             << FixItHint::CreateInsertion(EndLoc, ")");
++   Builder << FixItHint::CreateInsertion(EndLoc, " ? YES : NO");
++ }
++ 
++ /// Diagnose an implicit cast from a floating point value to an integer value.
++ static void DiagnoseFloatingImpCast(Sema &S, Expr *E, QualType T,
++                                     SourceLocation CContext) {
++   const bool IsBool = T->isSpecificBuiltinType(BuiltinType::Bool);
++   const bool PruneWarnings = S.inTemplateInstantiation();
++ 
++   Expr *InnerE = E->IgnoreParenImpCasts();
++   // We also want to warn on, e.g., "int i = -1.234"
++   if (UnaryOperator *UOp = dyn_cast<UnaryOperator>(InnerE))
++     if (UOp->getOpcode() == UO_Minus || UOp->getOpcode() == UO_Plus)
++       InnerE = UOp->getSubExpr()->IgnoreParenImpCasts();
++ 
++   const bool IsLiteral =
++       isa<FloatingLiteral>(E) || isa<FloatingLiteral>(InnerE);
++ 
++   llvm::APFloat Value(0.0);
++   bool IsConstant =
++     E->EvaluateAsFloat(Value, S.Context, Expr::SE_AllowSideEffects);
++   if (!IsConstant) {
++     if (isObjCSignedCharBool(S, T)) {
++       return adornObjCBoolConversionDiagWithTernaryFixit(
++           S, E,
++           S.Diag(CContext, diag::warn_impcast_float_to_objc_signed_char_bool)
++               << E->getType());
++     }
++ 
++     return DiagnoseImpCast(S, E, T, CContext,
++                            diag::warn_impcast_float_integer, PruneWarnings);
++   }
++ 
++   bool isExact = false;
++ 
++   llvm::APSInt IntegerValue(S.Context.getIntWidth(T),
++                             T->hasUnsignedIntegerRepresentation());
++   llvm::APFloat::opStatus Result = Value.convertToInteger(
++       IntegerValue, llvm::APFloat::rmTowardZero, &isExact);
++ 
++   // FIXME: Force the precision of the source value down so we don't print
++   // digits which are usually useless (we don't really care here if we
++   // truncate a digit by accident in edge cases).  Ideally, APFloat::toString
++   // would automatically print the shortest representation, but it's a bit
++   // tricky to implement.
++   SmallString<16> PrettySourceValue;
++   unsigned precision = llvm::APFloat::semanticsPrecision(Value.getSemantics());
++   precision = (precision * 59 + 195) / 196;
++   Value.toString(PrettySourceValue, precision);
++ 
++   if (isObjCSignedCharBool(S, T) && IntegerValue != 0 && IntegerValue != 1) {
++     return adornObjCBoolConversionDiagWithTernaryFixit(
++         S, E,
++         S.Diag(CContext, diag::warn_impcast_constant_value_to_objc_bool)
++             << PrettySourceValue);
++   }
++ 
++   if (Result == llvm::APFloat::opOK && isExact) {
++     if (IsLiteral) return;
++     return DiagnoseImpCast(S, E, T, CContext, diag::warn_impcast_float_integer,
++                            PruneWarnings);
++   }
++ 
++   // Conversion of a floating-point value to a non-bool integer where the
++   // integral part cannot be represented by the integer type is undefined.
++   if (!IsBool && Result == llvm::APFloat::opInvalidOp)
++     return DiagnoseImpCast(
++         S, E, T, CContext,
++         IsLiteral ? diag::warn_impcast_literal_float_to_integer_out_of_range
++                   : diag::warn_impcast_float_to_integer_out_of_range,
++         PruneWarnings);
++ 
++   unsigned DiagID = 0;
++   if (IsLiteral) {
++     // Warn on floating point literal to integer.
++     DiagID = diag::warn_impcast_literal_float_to_integer;
++   } else if (IntegerValue == 0) {
++     if (Value.isZero()) {  // Skip -0.0 to 0 conversion.
++       return DiagnoseImpCast(S, E, T, CContext,
++                              diag::warn_impcast_float_integer, PruneWarnings);
++     }
++     // Warn on non-zero to zero conversion.
++     DiagID = diag::warn_impcast_float_to_integer_zero;
++   } else {
++     if (IntegerValue.isUnsigned()) {
++       if (!IntegerValue.isMaxValue()) {
++         return DiagnoseImpCast(S, E, T, CContext,
++                                diag::warn_impcast_float_integer, PruneWarnings);
++       }
++     } else {  // IntegerValue.isSigned()
++       if (!IntegerValue.isMaxSignedValue() &&
++           !IntegerValue.isMinSignedValue()) {
++         return DiagnoseImpCast(S, E, T, CContext,
++                                diag::warn_impcast_float_integer, PruneWarnings);
++       }
++     }
++     // Warn on evaluatable floating point expression to integer conversion.
++     DiagID = diag::warn_impcast_float_to_integer;
++   }
++ 
++   SmallString<16> PrettyTargetValue;
++   if (IsBool)
++     PrettyTargetValue = Value.isZero() ? "false" : "true";
++   else
++     IntegerValue.toString(PrettyTargetValue);
++ 
++   if (PruneWarnings) {
++     S.DiagRuntimeBehavior(E->getExprLoc(), E,
++                           S.PDiag(DiagID)
++                               << E->getType() << T.getUnqualifiedType()
++                               << PrettySourceValue << PrettyTargetValue
++                               << E->getSourceRange() << SourceRange(CContext));
++   } else {
++     S.Diag(E->getExprLoc(), DiagID)
++         << E->getType() << T.getUnqualifiedType() << PrettySourceValue
++         << PrettyTargetValue << E->getSourceRange() << SourceRange(CContext);
++   }
++ }
++ 
++ /// Analyze the given compound assignment for the possible losing of
++ /// floating-point precision.
++ static void AnalyzeCompoundAssignment(Sema &S, BinaryOperator *E) {
++   assert(isa<CompoundAssignOperator>(E) &&
++          "Must be compound assignment operation");
++   // Recurse on the LHS and RHS in here
++   AnalyzeImplicitConversions(S, E->getLHS(), E->getOperatorLoc());
++   AnalyzeImplicitConversions(S, E->getRHS(), E->getOperatorLoc());
++ 
++   if (E->getLHS()->getType()->isAtomicType())
++     S.Diag(E->getOperatorLoc(), diag::warn_atomic_implicit_seq_cst);
++ 
++   // Now check the outermost expression
++   const auto *ResultBT = E->getLHS()->getType()->getAs<BuiltinType>();
++   const auto *RBT = cast<CompoundAssignOperator>(E)
++                         ->getComputationResultType()
++                         ->getAs<BuiltinType>();
++ 
++   // The below checks assume source is floating point.
++   if (!ResultBT || !RBT || !RBT->isFloatingPoint()) return;
++ 
++   // If source is floating point but target is an integer.
++   if (ResultBT->isInteger())
++     return DiagnoseImpCast(S, E, E->getRHS()->getType(), E->getLHS()->getType(),
++                            E->getExprLoc(), diag::warn_impcast_float_integer);
++ 
++   if (!ResultBT->isFloatingPoint())
++     return;
++ 
++   // If both source and target are floating points, warn about losing precision.
++   int Order = S.getASTContext().getFloatingTypeSemanticOrder(
++       QualType(ResultBT, 0), QualType(RBT, 0));
++   if (Order < 0 && !S.SourceMgr.isInSystemMacro(E->getOperatorLoc()))
++     // warn about dropping FP rank.
++     DiagnoseImpCast(S, E->getRHS(), E->getLHS()->getType(), E->getOperatorLoc(),
++                     diag::warn_impcast_float_result_precision);
++ }
++ 
++ static std::string PrettyPrintInRange(const llvm::APSInt &Value,
++                                       IntRange Range) {
++   if (!Range.Width) return "0";
++ 
++   llvm::APSInt ValueInRange = Value;
++   ValueInRange.setIsSigned(!Range.NonNegative);
++   ValueInRange = ValueInRange.trunc(Range.Width);
++   return toString(ValueInRange, 10);
++ }
++ 
++ static bool IsImplicitBoolFloatConversion(Sema &S, Expr *Ex, bool ToBool) {
++   if (!isa<ImplicitCastExpr>(Ex))
++     return false;
++ 
++   Expr *InnerE = Ex->IgnoreParenImpCasts();
++   const Type *Target = S.Context.getCanonicalType(Ex->getType()).getTypePtr();
++   const Type *Source =
++     S.Context.getCanonicalType(InnerE->getType()).getTypePtr();
++   if (Target->isDependentType())
++     return false;
++ 
++   const BuiltinType *FloatCandidateBT =
++     dyn_cast<BuiltinType>(ToBool ? Source : Target);
++   const Type *BoolCandidateType = ToBool ? Target : Source;
++ 
++   return (BoolCandidateType->isSpecificBuiltinType(BuiltinType::Bool) &&
++           FloatCandidateBT && (FloatCandidateBT->isFloatingPoint()));
++ }
++ 
++ static void CheckImplicitArgumentConversions(Sema &S, CallExpr *TheCall,
++                                              SourceLocation CC) {
++   unsigned NumArgs = TheCall->getNumArgs();
++   for (unsigned i = 0; i < NumArgs; ++i) {
++     Expr *CurrA = TheCall->getArg(i);
++     if (!IsImplicitBoolFloatConversion(S, CurrA, true))
++       continue;
++ 
++     bool IsSwapped = ((i > 0) &&
++         IsImplicitBoolFloatConversion(S, TheCall->getArg(i - 1), false));
++     IsSwapped |= ((i < (NumArgs - 1)) &&
++         IsImplicitBoolFloatConversion(S, TheCall->getArg(i + 1), false));
++     if (IsSwapped) {
++       // Warn on this floating-point to bool conversion.
++       DiagnoseImpCast(S, CurrA->IgnoreParenImpCasts(),
++                       CurrA->getType(), CC,
++                       diag::warn_impcast_floating_point_to_bool);
++     }
++   }
++ }
++ 
++ static void DiagnoseNullConversion(Sema &S, Expr *E, QualType T,
++                                    SourceLocation CC) {
++   if (S.Diags.isIgnored(diag::warn_impcast_null_pointer_to_integer,
++                         E->getExprLoc()))
++     return;
++ 
++   // Don't warn on functions which have return type nullptr_t.
++   if (isa<CallExpr>(E))
++     return;
++ 
++   // Check for NULL (GNUNull) or nullptr (CXX11_nullptr).
++   const Expr::NullPointerConstantKind NullKind =
++       E->isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull);
++   if (NullKind != Expr::NPCK_GNUNull && NullKind != Expr::NPCK_CXX11_nullptr)
++     return;
++ 
++   // Return if target type is a safe conversion.
++   if (T->isAnyPointerType() || T->isBlockPointerType() ||
++       T->isMemberPointerType() || !T->isScalarType() || T->isNullPtrType())
++     return;
++ 
++   SourceLocation Loc = E->getSourceRange().getBegin();
++ 
++   // Venture through the macro stacks to get to the source of macro arguments.
++   // The new location is a better location than the complete location that was
++   // passed in.
++   Loc = S.SourceMgr.getTopMacroCallerLoc(Loc);
++   CC = S.SourceMgr.getTopMacroCallerLoc(CC);
++ 
++   // __null is usually wrapped in a macro.  Go up a macro if that is the case.
++   if (NullKind == Expr::NPCK_GNUNull && Loc.isMacroID()) {
++     StringRef MacroName = Lexer::getImmediateMacroNameForDiagnostics(
++         Loc, S.SourceMgr, S.getLangOpts());
++     if (MacroName == "NULL")
++       Loc = S.SourceMgr.getImmediateExpansionRange(Loc).getBegin();
++   }
++ 
++   // Only warn if the null and context location are in the same macro expansion.
++   if (S.SourceMgr.getFileID(Loc) != S.SourceMgr.getFileID(CC))
++     return;
++ 
++   S.Diag(Loc, diag::warn_impcast_null_pointer_to_integer)
++       << (NullKind == Expr::NPCK_CXX11_nullptr) << T << SourceRange(CC)
++       << FixItHint::CreateReplacement(Loc,
++                                       S.getFixItZeroLiteralForType(T, Loc));
++ }
++ 
++ static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
++                                   ObjCArrayLiteral *ArrayLiteral);
++ 
++ static void
++ checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
++                            ObjCDictionaryLiteral *DictionaryLiteral);
++ 
++ /// Check a single element within a collection literal against the
++ /// target element type.
++ static void checkObjCCollectionLiteralElement(Sema &S,
++                                               QualType TargetElementType,
++                                               Expr *Element,
++                                               unsigned ElementKind) {
++   // Skip a bitcast to 'id' or qualified 'id'.
++   if (auto ICE = dyn_cast<ImplicitCastExpr>(Element)) {
++     if (ICE->getCastKind() == CK_BitCast &&
++         ICE->getSubExpr()->getType()->getAs<ObjCObjectPointerType>())
++       Element = ICE->getSubExpr();
++   }
++ 
++   QualType ElementType = Element->getType();
++   ExprResult ElementResult(Element);
++   if (ElementType->getAs<ObjCObjectPointerType>() &&
++       S.CheckSingleAssignmentConstraints(TargetElementType,
++                                          ElementResult,
++                                          false, false)
++         != Sema::Compatible) {
++     S.Diag(Element->getBeginLoc(), diag::warn_objc_collection_literal_element)
++         << ElementType << ElementKind << TargetElementType
++         << Element->getSourceRange();
++   }
++ 
++   if (auto ArrayLiteral = dyn_cast<ObjCArrayLiteral>(Element))
++     checkObjCArrayLiteral(S, TargetElementType, ArrayLiteral);
++   else if (auto DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(Element))
++     checkObjCDictionaryLiteral(S, TargetElementType, DictionaryLiteral);
++ }
++ 
++ /// Check an Objective-C array literal being converted to the given
++ /// target type.
++ static void checkObjCArrayLiteral(Sema &S, QualType TargetType,
++                                   ObjCArrayLiteral *ArrayLiteral) {
++   if (!S.NSArrayDecl)
++     return;
++ 
++   const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
++   if (!TargetObjCPtr)
++     return;
++ 
++   if (TargetObjCPtr->isUnspecialized() ||
++       TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
++         != S.NSArrayDecl->getCanonicalDecl())
++     return;
++ 
++   auto TypeArgs = TargetObjCPtr->getTypeArgs();
++   if (TypeArgs.size() != 1)
++     return;
++ 
++   QualType TargetElementType = TypeArgs[0];
++   for (unsigned I = 0, N = ArrayLiteral->getNumElements(); I != N; ++I) {
++     checkObjCCollectionLiteralElement(S, TargetElementType,
++                                       ArrayLiteral->getElement(I),
++                                       0);
++   }
++ }
++ 
++ /// Check an Objective-C dictionary literal being converted to the given
++ /// target type.
++ static void
++ checkObjCDictionaryLiteral(Sema &S, QualType TargetType,
++                            ObjCDictionaryLiteral *DictionaryLiteral) {
++   if (!S.NSDictionaryDecl)
++     return;
++ 
++   const auto *TargetObjCPtr = TargetType->getAs<ObjCObjectPointerType>();
++   if (!TargetObjCPtr)
++     return;
++ 
++   if (TargetObjCPtr->isUnspecialized() ||
++       TargetObjCPtr->getInterfaceDecl()->getCanonicalDecl()
++         != S.NSDictionaryDecl->getCanonicalDecl())
++     return;
++ 
++   auto TypeArgs = TargetObjCPtr->getTypeArgs();
++   if (TypeArgs.size() != 2)
++     return;
++ 
++   QualType TargetKeyType = TypeArgs[0];
++   QualType TargetObjectType = TypeArgs[1];
++   for (unsigned I = 0, N = DictionaryLiteral->getNumElements(); I != N; ++I) {
++     auto Element = DictionaryLiteral->getKeyValueElement(I);
++     checkObjCCollectionLiteralElement(S, TargetKeyType, Element.Key, 1);
++     checkObjCCollectionLiteralElement(S, TargetObjectType, Element.Value, 2);
++   }
++ }
++ 
++ // Helper function to filter out cases for constant width constant conversion.
++ // Don't warn on char array initialization or for non-decimal values.
++ static bool isSameWidthConstantConversion(Sema &S, Expr *E, QualType T,
++                                           SourceLocation CC) {
++   // If initializing from a constant, and the constant starts with '0',
++   // then it is a binary, octal, or hexadecimal.  Allow these constants
++   // to fill all the bits, even if there is a sign change.
++   if (auto *IntLit = dyn_cast<IntegerLiteral>(E->IgnoreParenImpCasts())) {
++     const char FirstLiteralCharacter =
++         S.getSourceManager().getCharacterData(IntLit->getBeginLoc())[0];
++     if (FirstLiteralCharacter == '0')
++       return false;
++   }
++ 
++   // If the CC location points to a '{', and the type is char, then assume
++   // assume it is an array initialization.
++   if (CC.isValid() && T->isCharType()) {
++     const char FirstContextCharacter =
++         S.getSourceManager().getCharacterData(CC)[0];
++     if (FirstContextCharacter == '{')
++       return false;
++   }
++ 
++   return true;
++ }
++ 
++ static const IntegerLiteral *getIntegerLiteral(Expr *E) {
++   const auto *IL = dyn_cast<IntegerLiteral>(E);
++   if (!IL) {
++     if (auto *UO = dyn_cast<UnaryOperator>(E)) {
++       if (UO->getOpcode() == UO_Minus)
++         return dyn_cast<IntegerLiteral>(UO->getSubExpr());
++     }
++   }
++ 
++   return IL;
++ }
++ 
++ static void DiagnoseIntInBoolContext(Sema &S, Expr *E) {
++   E = E->IgnoreParenImpCasts();
++   SourceLocation ExprLoc = E->getExprLoc();
++ 
++   if (const auto *BO = dyn_cast<BinaryOperator>(E)) {
++     BinaryOperator::Opcode Opc = BO->getOpcode();
++     Expr::EvalResult Result;
++     // Do not diagnose unsigned shifts.
++     if (Opc == BO_Shl) {
++       const auto *LHS = getIntegerLiteral(BO->getLHS());
++       const auto *RHS = getIntegerLiteral(BO->getRHS());
++       if (LHS && LHS->getValue() == 0)
++         S.Diag(ExprLoc, diag::warn_left_shift_always) << 0;
++       else if (!E->isValueDependent() && LHS && RHS &&
++                RHS->getValue().isNonNegative() &&
++                E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects))
++         S.Diag(ExprLoc, diag::warn_left_shift_always)
++             << (Result.Val.getInt() != 0);
++       else if (E->getType()->isSignedIntegerType())
++         S.Diag(ExprLoc, diag::warn_left_shift_in_bool_context) << E;
++     }
++   }
++ 
++   if (const auto *CO = dyn_cast<ConditionalOperator>(E)) {
++     const auto *LHS = getIntegerLiteral(CO->getTrueExpr());
++     const auto *RHS = getIntegerLiteral(CO->getFalseExpr());
++     if (!LHS || !RHS)
++       return;
++     if ((LHS->getValue() == 0 || LHS->getValue() == 1) &&
++         (RHS->getValue() == 0 || RHS->getValue() == 1))
++       // Do not diagnose common idioms.
++       return;
++     if (LHS->getValue() != 0 && RHS->getValue() != 0)
++       S.Diag(ExprLoc, diag::warn_integer_constants_in_conditional_always_true);
++   }
++ }
++ 
++ static void CheckImplicitConversion(Sema &S, Expr *E, QualType T,
++                                     SourceLocation CC,
++                                     bool *ICContext = nullptr,
++                                     bool IsListInit = false) {
++   if (E->isTypeDependent() || E->isValueDependent()) return;
++ 
++   const Type *Source = S.Context.getCanonicalType(E->getType()).getTypePtr();
++   const Type *Target = S.Context.getCanonicalType(T).getTypePtr();
++   if (Source == Target) return;
++   if (Target->isDependentType()) return;
++ 
++   // If the conversion context location is invalid don't complain. We also
++   // don't want to emit a warning if the issue occurs from the expansion of
++   // a system macro. The problem is that 'getSpellingLoc()' is slow, so we
++   // delay this check as long as possible. Once we detect we are in that
++   // scenario, we just return.
++   if (CC.isInvalid())
++     return;
++ 
++   if (Source->isAtomicType())
++     S.Diag(E->getExprLoc(), diag::warn_atomic_implicit_seq_cst);
++ 
++   // Diagnose implicit casts to bool.
++   if (Target->isSpecificBuiltinType(BuiltinType::Bool)) {
++     if (isa<StringLiteral>(E))
++       // Warn on string literal to bool.  Checks for string literals in logical
++       // and expressions, for instance, assert(0 && "error here"), are
++       // prevented by a check in AnalyzeImplicitConversions().
++       return DiagnoseImpCast(S, E, T, CC,
++                              diag::warn_impcast_string_literal_to_bool);
++     if (isa<ObjCStringLiteral>(E) || isa<ObjCArrayLiteral>(E) ||
++         isa<ObjCDictionaryLiteral>(E) || isa<ObjCBoxedExpr>(E)) {
++       // This covers the literal expressions that evaluate to Objective-C
++       // objects.
++       return DiagnoseImpCast(S, E, T, CC,
++                              diag::warn_impcast_objective_c_literal_to_bool);
++     }
++     if (Source->isPointerType() || Source->canDecayToPointerType()) {
++       // Warn on pointer to bool conversion that is always true.
++       S.DiagnoseAlwaysNonNullPointer(E, Expr::NPCK_NotNull, /*IsEqual*/ false,
++                                      SourceRange(CC));
++     }
++   }
++ 
++   // If the we're converting a constant to an ObjC BOOL on a platform where BOOL
++   // is a typedef for signed char (macOS), then that constant value has to be 1
++   // or 0.
++   if (isObjCSignedCharBool(S, T) && Source->isIntegralType(S.Context)) {
++     Expr::EvalResult Result;
++     if (E->EvaluateAsInt(Result, S.getASTContext(),
++                          Expr::SE_AllowSideEffects)) {
++       if (Result.Val.getInt() != 1 && Result.Val.getInt() != 0) {
++         adornObjCBoolConversionDiagWithTernaryFixit(
++             S, E,
++             S.Diag(CC, diag::warn_impcast_constant_value_to_objc_bool)
++                 << toString(Result.Val.getInt(), 10));
++       }
++       return;
++     }
++   }
++ 
++   // Check implicit casts from Objective-C collection literals to specialized
++   // collection types, e.g., NSArray<NSString *> *.
++   if (auto *ArrayLiteral = dyn_cast<ObjCArrayLiteral>(E))
++     checkObjCArrayLiteral(S, QualType(Target, 0), ArrayLiteral);
++   else if (auto *DictionaryLiteral = dyn_cast<ObjCDictionaryLiteral>(E))
++     checkObjCDictionaryLiteral(S, QualType(Target, 0), DictionaryLiteral);
++ 
++   // Strip vector types.
++   if (isa<VectorType>(Source)) {
++     if (Target->isVLSTBuiltinType() &&
++         (S.Context.areCompatibleSveTypes(QualType(Target, 0),
++                                          QualType(Source, 0)) ||
++          S.Context.areLaxCompatibleSveTypes(QualType(Target, 0),
++                                             QualType(Source, 0))))
++       return;
++ 
++     if (!isa<VectorType>(Target)) {
++       if (S.SourceMgr.isInSystemMacro(CC))
++         return;
++       return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_vector_scalar);
++     }
++ 
++     // If the vector cast is cast between two vectors of the same size, it is
++     // a bitcast, not a conversion.
++     if (S.Context.getTypeSize(Source) == S.Context.getTypeSize(Target))
++       return;
++ 
++     Source = cast<VectorType>(Source)->getElementType().getTypePtr();
++     Target = cast<VectorType>(Target)->getElementType().getTypePtr();
++   }
++   if (auto VecTy = dyn_cast<VectorType>(Target))
++     Target = VecTy->getElementType().getTypePtr();
++ 
++   // Strip complex types.
++   if (isa<ComplexType>(Source)) {
++     if (!isa<ComplexType>(Target)) {
++       if (S.SourceMgr.isInSystemMacro(CC) || Target->isBooleanType())
++         return;
++ 
++       return DiagnoseImpCast(S, E, T, CC,
++                              S.getLangOpts().CPlusPlus
++                                  ? diag::err_impcast_complex_scalar
++                                  : diag::warn_impcast_complex_scalar);
++     }
++ 
++     Source = cast<ComplexType>(Source)->getElementType().getTypePtr();
++     Target = cast<ComplexType>(Target)->getElementType().getTypePtr();
++   }
++ 
++   const BuiltinType *SourceBT = dyn_cast<BuiltinType>(Source);
++   const BuiltinType *TargetBT = dyn_cast<BuiltinType>(Target);
++ 
++   // If the source is floating point...
++   if (SourceBT && SourceBT->isFloatingPoint()) {
++     // ...and the target is floating point...
++     if (TargetBT && TargetBT->isFloatingPoint()) {
++       // ...then warn if we're dropping FP rank.
++ 
++       int Order = S.getASTContext().getFloatingTypeSemanticOrder(
++           QualType(SourceBT, 0), QualType(TargetBT, 0));
++       if (Order > 0) {
++         // Don't warn about float constants that are precisely
++         // representable in the target type.
++         Expr::EvalResult result;
++         if (E->EvaluateAsRValue(result, S.Context)) {
++           // Value might be a float, a float vector, or a float complex.
++           if (IsSameFloatAfterCast(result.Val,
++                    S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)),
++                    S.Context.getFloatTypeSemantics(QualType(SourceBT, 0))))
++             return;
++         }
++ 
++         if (S.SourceMgr.isInSystemMacro(CC))
++           return;
++ 
++         DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_float_precision);
++       }
++       // ... or possibly if we're increasing rank, too
++       else if (Order < 0) {
++         if (S.SourceMgr.isInSystemMacro(CC))
++           return;
++ 
++         DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_double_promotion);
++       }
++       return;
++     }
++ 
++     // If the target is integral, always warn.
++     if (TargetBT && TargetBT->isInteger()) {
++       if (S.SourceMgr.isInSystemMacro(CC))
++         return;
++ 
++       DiagnoseFloatingImpCast(S, E, T, CC);
++     }
++ 
++     // Detect the case where a call result is converted from floating-point to
++     // to bool, and the final argument to the call is converted from bool, to
++     // discover this typo:
++     //
++     //    bool b = fabs(x < 1.0);  // should be "bool b = fabs(x) < 1.0;"
++     //
++     // FIXME: This is an incredibly special case; is there some more general
++     // way to detect this class of misplaced-parentheses bug?
++     if (Target->isBooleanType() && isa<CallExpr>(E)) {
++       // Check last argument of function call to see if it is an
++       // implicit cast from a type matching the type the result
++       // is being cast to.
++       CallExpr *CEx = cast<CallExpr>(E);
++       if (unsigned NumArgs = CEx->getNumArgs()) {
++         Expr *LastA = CEx->getArg(NumArgs - 1);
++         Expr *InnerE = LastA->IgnoreParenImpCasts();
++         if (isa<ImplicitCastExpr>(LastA) &&
++             InnerE->getType()->isBooleanType()) {
++           // Warn on this floating-point to bool conversion
++           DiagnoseImpCast(S, E, T, CC,
++                           diag::warn_impcast_floating_point_to_bool);
++         }
++       }
++     }
++     return;
++   }
++ 
++   // Valid casts involving fixed point types should be accounted for here.
++   if (Source->isFixedPointType()) {
++     if (Target->isUnsaturatedFixedPointType()) {
++       Expr::EvalResult Result;
++       if (E->EvaluateAsFixedPoint(Result, S.Context, Expr::SE_AllowSideEffects,
++                                   S.isConstantEvaluated())) {
++         llvm::APFixedPoint Value = Result.Val.getFixedPoint();
++         llvm::APFixedPoint MaxVal = S.Context.getFixedPointMax(T);
++         llvm::APFixedPoint MinVal = S.Context.getFixedPointMin(T);
++         if (Value > MaxVal || Value < MinVal) {
++           S.DiagRuntimeBehavior(E->getExprLoc(), E,
++                                 S.PDiag(diag::warn_impcast_fixed_point_range)
++                                     << Value.toString() << T
++                                     << E->getSourceRange()
++                                     << clang::SourceRange(CC));
++           return;
++         }
++       }
++     } else if (Target->isIntegerType()) {
++       Expr::EvalResult Result;
++       if (!S.isConstantEvaluated() &&
++           E->EvaluateAsFixedPoint(Result, S.Context,
++                                   Expr::SE_AllowSideEffects)) {
++         llvm::APFixedPoint FXResult = Result.Val.getFixedPoint();
++ 
++         bool Overflowed;
++         llvm::APSInt IntResult = FXResult.convertToInt(
++             S.Context.getIntWidth(T),
++             Target->isSignedIntegerOrEnumerationType(), &Overflowed);
++ 
++         if (Overflowed) {
++           S.DiagRuntimeBehavior(E->getExprLoc(), E,
++                                 S.PDiag(diag::warn_impcast_fixed_point_range)
++                                     << FXResult.toString() << T
++                                     << E->getSourceRange()
++                                     << clang::SourceRange(CC));
++           return;
++         }
++       }
++     }
++   } else if (Target->isUnsaturatedFixedPointType()) {
++     if (Source->isIntegerType()) {
++       Expr::EvalResult Result;
++       if (!S.isConstantEvaluated() &&
++           E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects)) {
++         llvm::APSInt Value = Result.Val.getInt();
++ 
++         bool Overflowed;
++         llvm::APFixedPoint IntResult = llvm::APFixedPoint::getFromIntValue(
++             Value, S.Context.getFixedPointSemantics(T), &Overflowed);
++ 
++         if (Overflowed) {
++           S.DiagRuntimeBehavior(E->getExprLoc(), E,
++                                 S.PDiag(diag::warn_impcast_fixed_point_range)
++                                     << toString(Value, /*Radix=*/10) << T
++                                     << E->getSourceRange()
++                                     << clang::SourceRange(CC));
++           return;
++         }
++       }
++     }
++   }
++ 
++   // If we are casting an integer type to a floating point type without
++   // initialization-list syntax, we might lose accuracy if the floating
++   // point type has a narrower significand than the integer type.
++   if (SourceBT && TargetBT && SourceBT->isIntegerType() &&
++       TargetBT->isFloatingType() && !IsListInit) {
++     // Determine the number of precision bits in the source integer type.
++     IntRange SourceRange = GetExprRange(S.Context, E, S.isConstantEvaluated(),
++                                         /*Approximate*/ true);
++     unsigned int SourcePrecision = SourceRange.Width;
++ 
++     // Determine the number of precision bits in the
++     // target floating point type.
++     unsigned int TargetPrecision = llvm::APFloatBase::semanticsPrecision(
++         S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)));
++ 
++     if (SourcePrecision > 0 && TargetPrecision > 0 &&
++         SourcePrecision > TargetPrecision) {
++ 
++       if (Optional<llvm::APSInt> SourceInt =
++               E->getIntegerConstantExpr(S.Context)) {
++         // If the source integer is a constant, convert it to the target
++         // floating point type. Issue a warning if the value changes
++         // during the whole conversion.
++         llvm::APFloat TargetFloatValue(
++             S.Context.getFloatTypeSemantics(QualType(TargetBT, 0)));
++         llvm::APFloat::opStatus ConversionStatus =
++             TargetFloatValue.convertFromAPInt(
++                 *SourceInt, SourceBT->isSignedInteger(),
++                 llvm::APFloat::rmNearestTiesToEven);
++ 
++         if (ConversionStatus != llvm::APFloat::opOK) {
++           SmallString<32> PrettySourceValue;
++           SourceInt->toString(PrettySourceValue, 10);
++           SmallString<32> PrettyTargetValue;
++           TargetFloatValue.toString(PrettyTargetValue, TargetPrecision);
++ 
++           S.DiagRuntimeBehavior(
++               E->getExprLoc(), E,
++               S.PDiag(diag::warn_impcast_integer_float_precision_constant)
++                   << PrettySourceValue << PrettyTargetValue << E->getType() << T
++                   << E->getSourceRange() << clang::SourceRange(CC));
++         }
++       } else {
++         // Otherwise, the implicit conversion may lose precision.
++         DiagnoseImpCast(S, E, T, CC,
++                         diag::warn_impcast_integer_float_precision);
++       }
++     }
++   }
++ 
++   DiagnoseNullConversion(S, E, T, CC);
++ 
++   S.DiscardMisalignedMemberAddress(Target, E);
++ 
++   if (Target->isBooleanType())
++     DiagnoseIntInBoolContext(S, E);
++ 
++   if (!Source->isIntegerType() || !Target->isIntegerType())
++     return;
++ 
++   // TODO: remove this early return once the false positives for constant->bool
++   // in templates, macros, etc, are reduced or removed.
++   if (Target->isSpecificBuiltinType(BuiltinType::Bool))
++     return;
++ 
++   if (isObjCSignedCharBool(S, T) && !Source->isCharType() &&
++       !E->isKnownToHaveBooleanValue(/*Semantic=*/false)) {
++     return adornObjCBoolConversionDiagWithTernaryFixit(
++         S, E,
++         S.Diag(CC, diag::warn_impcast_int_to_objc_signed_char_bool)
++             << E->getType());
++   }
++ 
++   IntRange SourceTypeRange =
++       IntRange::forTargetOfCanonicalType(S.Context, Source);
++   IntRange LikelySourceRange =
++       GetExprRange(S.Context, E, S.isConstantEvaluated(), /*Approximate*/ true);
++   IntRange TargetRange = IntRange::forTargetOfCanonicalType(S.Context, Target);
++ 
++   if (LikelySourceRange.Width > TargetRange.Width) {
++     // If the source is a constant, use a default-on diagnostic.
++     // TODO: this should happen for bitfield stores, too.
++     Expr::EvalResult Result;
++     if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects,
++                          S.isConstantEvaluated())) {
++       llvm::APSInt Value(32);
++       Value = Result.Val.getInt();
++ 
++       if (S.SourceMgr.isInSystemMacro(CC))
++         return;
++ 
++       std::string PrettySourceValue = toString(Value, 10);
++       std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
++ 
++       S.DiagRuntimeBehavior(
++           E->getExprLoc(), E,
++           S.PDiag(diag::warn_impcast_integer_precision_constant)
++               << PrettySourceValue << PrettyTargetValue << E->getType() << T
++               << E->getSourceRange() << SourceRange(CC));
++       return;
++     }
++ 
++     // People want to build with -Wshorten-64-to-32 and not -Wconversion.
++     if (S.SourceMgr.isInSystemMacro(CC))
++       return;
++ 
++     if (TargetRange.Width == 32 && S.Context.getIntWidth(E->getType()) == 64)
++       return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_64_32,
++                              /* pruneControlFlow */ true);
++     return DiagnoseImpCast(S, E, T, CC, diag::warn_impcast_integer_precision);
++   }
++ 
++   if (TargetRange.Width > SourceTypeRange.Width) {
++     if (auto *UO = dyn_cast<UnaryOperator>(E))
++       if (UO->getOpcode() == UO_Minus)
++         if (Source->isUnsignedIntegerType()) {
++           if (Target->isUnsignedIntegerType())
++             return DiagnoseImpCast(S, E, T, CC,
++                                    diag::warn_impcast_high_order_zero_bits);
++           if (Target->isSignedIntegerType())
++             return DiagnoseImpCast(S, E, T, CC,
++                                    diag::warn_impcast_nonnegative_result);
++         }
++   }
++ 
++   if (TargetRange.Width == LikelySourceRange.Width &&
++       !TargetRange.NonNegative && LikelySourceRange.NonNegative &&
++       Source->isSignedIntegerType()) {
++     // Warn when doing a signed to signed conversion, warn if the positive
++     // source value is exactly the width of the target type, which will
++     // cause a negative value to be stored.
++ 
++     Expr::EvalResult Result;
++     if (E->EvaluateAsInt(Result, S.Context, Expr::SE_AllowSideEffects) &&
++         !S.SourceMgr.isInSystemMacro(CC)) {
++       llvm::APSInt Value = Result.Val.getInt();
++       if (isSameWidthConstantConversion(S, E, T, CC)) {
++         std::string PrettySourceValue = toString(Value, 10);
++         std::string PrettyTargetValue = PrettyPrintInRange(Value, TargetRange);
++ 
++         S.DiagRuntimeBehavior(
++             E->getExprLoc(), E,
++             S.PDiag(diag::warn_impcast_integer_precision_constant)
++                 << PrettySourceValue << PrettyTargetValue << E->getType() << T
++                 << E->getSourceRange() << SourceRange(CC));
++         return;
++       }
++     }
++ 
++     // Fall through for non-constants to give a sign conversion warning.
++   }
++ 
++   if ((TargetRange.NonNegative && !LikelySourceRange.NonNegative) ||
++       (!TargetRange.NonNegative && LikelySourceRange.NonNegative &&
++        LikelySourceRange.Width == TargetRange.Width)) {
++     if (S.SourceMgr.isInSystemMacro(CC))
++       return;
++ 
++     unsigned DiagID = diag::warn_impcast_integer_sign;
++ 
++     // Traditionally, gcc has warned about this under -Wsign-compare.
++     // We also want to warn about it in -Wconversion.
++     // So if -Wconversion is off, use a completely identical diagnostic
++     // in the sign-compare group.
++     // The conditional-checking code will
++     if (ICContext) {
++       DiagID = diag::warn_impcast_integer_sign_conditional;
++       *ICContext = true;
++     }
++ 
++     return DiagnoseImpCast(S, E, T, CC, DiagID);
++   }
++ 
++   // Diagnose conversions between different enumeration types.
++   // In C, we pretend that the type of an EnumConstantDecl is its enumeration
++   // type, to give us better diagnostics.
++   QualType SourceType = E->getType();
++   if (!S.getLangOpts().CPlusPlus) {
++     if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
++       if (EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(DRE->getDecl())) {
++         EnumDecl *Enum = cast<EnumDecl>(ECD->getDeclContext());
++         SourceType = S.Context.getTypeDeclType(Enum);
++         Source = S.Context.getCanonicalType(SourceType).getTypePtr();
++       }
++   }
++ 
++   if (const EnumType *SourceEnum = Source->getAs<EnumType>())
++     if (const EnumType *TargetEnum = Target->getAs<EnumType>())
++       if (SourceEnum->getDecl()->hasNameForLinkage() &&
++           TargetEnum->getDecl()->hasNameForLinkage() &&
++           SourceEnum != TargetEnum) {
++         if (S.SourceMgr.isInSystemMacro(CC))
++           return;
++ 
++         return DiagnoseImpCast(S, E, SourceType, T, CC,
++                                diag::warn_impcast_different_enum_types);
++       }
++ }
++ 
++ static void CheckConditionalOperator(Sema &S, AbstractConditionalOperator *E,
++                                      SourceLocation CC, QualType T);
++ 
++ static void CheckConditionalOperand(Sema &S, Expr *E, QualType T,
++                                     SourceLocation CC, bool &ICContext) {
++   E = E->IgnoreParenImpCasts();
++ 
++   if (auto *CO = dyn_cast<AbstractConditionalOperator>(E))
++     return CheckConditionalOperator(S, CO, CC, T);
++ 
++   AnalyzeImplicitConversions(S, E, CC);
++   if (E->getType() != T)
++     return CheckImplicitConversion(S, E, T, CC, &ICContext);
++ }
++ 
++ static void CheckConditionalOperator(Sema &S, AbstractConditionalOperator *E,
++                                      SourceLocation CC, QualType T) {
++   AnalyzeImplicitConversions(S, E->getCond(), E->getQuestionLoc());
++ 
++   Expr *TrueExpr = E->getTrueExpr();
++   if (auto *BCO = dyn_cast<BinaryConditionalOperator>(E))
++     TrueExpr = BCO->getCommon();
++ 
++   bool Suspicious = false;
++   CheckConditionalOperand(S, TrueExpr, T, CC, Suspicious);
++   CheckConditionalOperand(S, E->getFalseExpr(), T, CC, Suspicious);
++ 
++   if (T->isBooleanType())
++     DiagnoseIntInBoolContext(S, E);
++ 
++   // If -Wconversion would have warned about either of the candidates
++   // for a signedness conversion to the context type...
++   if (!Suspicious) return;
++ 
++   // ...but it's currently ignored...
++   if (!S.Diags.isIgnored(diag::warn_impcast_integer_sign_conditional, CC))
++     return;
++ 
++   // ...then check whether it would have warned about either of the
++   // candidates for a signedness conversion to the condition type.
++   if (E->getType() == T) return;
++ 
++   Suspicious = false;
++   CheckImplicitConversion(S, TrueExpr->IgnoreParenImpCasts(),
++                           E->getType(), CC, &Suspicious);
++   if (!Suspicious)
++     CheckImplicitConversion(S, E->getFalseExpr()->IgnoreParenImpCasts(),
++                             E->getType(), CC, &Suspicious);
++ }
++ 
++ /// Check conversion of given expression to boolean.
++ /// Input argument E is a logical expression.
++ static void CheckBoolLikeConversion(Sema &S, Expr *E, SourceLocation CC) {
++   if (S.getLangOpts().Bool)
++     return;
++   if (E->IgnoreParenImpCasts()->getType()->isAtomicType())
++     return;
++   CheckImplicitConversion(S, E->IgnoreParenImpCasts(), S.Context.BoolTy, CC);
++ }
++ 
++ namespace {
++ struct AnalyzeImplicitConversionsWorkItem {
++   Expr *E;
++   SourceLocation CC;
++   bool IsListInit;
++ };
++ }
++ 
++ /// Data recursive variant of AnalyzeImplicitConversions. Subexpressions
++ /// that should be visited are added to WorkList.
++ static void AnalyzeImplicitConversions(
++     Sema &S, AnalyzeImplicitConversionsWorkItem Item,
++     llvm::SmallVectorImpl<AnalyzeImplicitConversionsWorkItem> &WorkList) {
++   Expr *OrigE = Item.E;
++   SourceLocation CC = Item.CC;
++ 
++   QualType T = OrigE->getType();
++   Expr *E = OrigE->IgnoreParenImpCasts();
++ 
++   // Propagate whether we are in a C++ list initialization expression.
++   // If so, we do not issue warnings for implicit int-float conversion
++   // precision loss, because C++11 narrowing already handles it.
++   bool IsListInit = Item.IsListInit ||
++                     (isa<InitListExpr>(OrigE) && S.getLangOpts().CPlusPlus);
++ 
++   if (E->isTypeDependent() || E->isValueDependent())
++     return;
++ 
++   Expr *SourceExpr = E;
++   // Examine, but don't traverse into the source expression of an
++   // OpaqueValueExpr, since it may have multiple parents and we don't want to
++   // emit duplicate diagnostics. Its fine to examine the form or attempt to
++   // evaluate it in the context of checking the specific conversion to T though.
++   if (auto *OVE = dyn_cast<OpaqueValueExpr>(E))
++     if (auto *Src = OVE->getSourceExpr())
++       SourceExpr = Src;
++ 
++   if (const auto *UO = dyn_cast<UnaryOperator>(SourceExpr))
++     if (UO->getOpcode() == UO_Not &&
++         UO->getSubExpr()->isKnownToHaveBooleanValue())
++       S.Diag(UO->getBeginLoc(), diag::warn_bitwise_negation_bool)
++           << OrigE->getSourceRange() << T->isBooleanType()
++           << FixItHint::CreateReplacement(UO->getBeginLoc(), "!");
++ 
+++  if (const auto *BO = dyn_cast<BinaryOperator>(SourceExpr))
+++    if ((BO->getOpcode() == BO_And || BO->getOpcode() == BO_Or) &&
+++        BO->getLHS()->isKnownToHaveBooleanValue() &&
+++        BO->getRHS()->isKnownToHaveBooleanValue() &&
+++        BO->getLHS()->HasSideEffects(S.Context) &&
+++        BO->getRHS()->HasSideEffects(S.Context))
+++      S.Diag(BO->getBeginLoc(), diag::warn_bitwise_instead_of_logical)
+++          << (BO->getOpcode() == BO_And ? "&" : "|") << OrigE->getSourceRange()
+++          << FixItHint::CreateReplacement(
+++                 BO->getOperatorLoc(),
+++                 (BO->getOpcode() == BO_And ? "&&" : "||"));
+++
++   // For conditional operators, we analyze the arguments as if they
++   // were being fed directly into the output.
++   if (auto *CO = dyn_cast<AbstractConditionalOperator>(SourceExpr)) {
++     CheckConditionalOperator(S, CO, CC, T);
++     return;
++   }
++ 
++   // Check implicit argument conversions for function calls.
++   if (CallExpr *Call = dyn_cast<CallExpr>(SourceExpr))
++     CheckImplicitArgumentConversions(S, Call, CC);
++ 
++   // Go ahead and check any implicit conversions we might have skipped.
++   // The non-canonical typecheck is just an optimization;
++   // CheckImplicitConversion will filter out dead implicit conversions.
++   if (SourceExpr->getType() != T)
++     CheckImplicitConversion(S, SourceExpr, T, CC, nullptr, IsListInit);
++ 
++   // Now continue drilling into this expression.
++ 
++   if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) {
++     // The bound subexpressions in a PseudoObjectExpr are not reachable
++     // as transitive children.
++     // FIXME: Use a more uniform representation for this.
++     for (auto *SE : POE->semantics())
++       if (auto *OVE = dyn_cast<OpaqueValueExpr>(SE))
++         WorkList.push_back({OVE->getSourceExpr(), CC, IsListInit});
++   }
++ 
++   // Skip past explicit casts.
++   if (auto *CE = dyn_cast<ExplicitCastExpr>(E)) {
++     E = CE->getSubExpr()->IgnoreParenImpCasts();
++     if (!CE->getType()->isVoidType() && E->getType()->isAtomicType())
++       S.Diag(E->getBeginLoc(), diag::warn_atomic_implicit_seq_cst);
++     WorkList.push_back({E, CC, IsListInit});
++     return;
++   }
++ 
++   if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
++     // Do a somewhat different check with comparison operators.
++     if (BO->isComparisonOp())
++       return AnalyzeComparison(S, BO);
++ 
++     // And with simple assignments.
++     if (BO->getOpcode() == BO_Assign)
++       return AnalyzeAssignment(S, BO);
++     // And with compound assignments.
++     if (BO->isAssignmentOp())
++       return AnalyzeCompoundAssignment(S, BO);
++   }
++ 
++   // These break the otherwise-useful invariant below.  Fortunately,
++   // we don't really need to recurse into them, because any internal
++   // expressions should have been analyzed already when they were
++   // built into statements.
++   if (isa<StmtExpr>(E)) return;
++ 
++   // Don't descend into unevaluated contexts.
++   if (isa<UnaryExprOrTypeTraitExpr>(E)) return;
++ 
++   // Now just recurse over the expression's children.
++   CC = E->getExprLoc();
++   BinaryOperator *BO = dyn_cast<BinaryOperator>(E);
++   bool IsLogicalAndOperator = BO && BO->getOpcode() == BO_LAnd;
++   for (Stmt *SubStmt : E->children()) {
++     Expr *ChildExpr = dyn_cast_or_null<Expr>(SubStmt);
++     if (!ChildExpr)
++       continue;
++ 
++     if (IsLogicalAndOperator &&
++         isa<StringLiteral>(ChildExpr->IgnoreParenImpCasts()))
++       // Ignore checking string literals that are in logical and operators.
++       // This is a common pattern for asserts.
++       continue;
++     WorkList.push_back({ChildExpr, CC, IsListInit});
++   }
++ 
++   if (BO && BO->isLogicalOp()) {
++     Expr *SubExpr = BO->getLHS()->IgnoreParenImpCasts();
++     if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
++       ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
++ 
++     SubExpr = BO->getRHS()->IgnoreParenImpCasts();
++     if (!IsLogicalAndOperator || !isa<StringLiteral>(SubExpr))
++       ::CheckBoolLikeConversion(S, SubExpr, BO->getExprLoc());
++   }
++ 
++   if (const UnaryOperator *U = dyn_cast<UnaryOperator>(E)) {
++     if (U->getOpcode() == UO_LNot) {
++       ::CheckBoolLikeConversion(S, U->getSubExpr(), CC);
++     } else if (U->getOpcode() != UO_AddrOf) {
++       if (U->getSubExpr()->getType()->isAtomicType())
++         S.Diag(U->getSubExpr()->getBeginLoc(),
++                diag::warn_atomic_implicit_seq_cst);
++     }
++   }
++ }
++ 
++ /// AnalyzeImplicitConversions - Find and report any interesting
++ /// implicit conversions in the given expression.  There are a couple
++ /// of competing diagnostics here, -Wconversion and -Wsign-compare.
++ static void AnalyzeImplicitConversions(Sema &S, Expr *OrigE, SourceLocation CC,
++                                        bool IsListInit/*= false*/) {
++   llvm::SmallVector<AnalyzeImplicitConversionsWorkItem, 16> WorkList;
++   WorkList.push_back({OrigE, CC, IsListInit});
++   while (!WorkList.empty())
++     AnalyzeImplicitConversions(S, WorkList.pop_back_val(), WorkList);
++ }
++ 
++ /// Diagnose integer type and any valid implicit conversion to it.
++ static bool checkOpenCLEnqueueIntType(Sema &S, Expr *E, const QualType &IntT) {
++   // Taking into account implicit conversions,
++   // allow any integer.
++   if (!E->getType()->isIntegerType()) {
++     S.Diag(E->getBeginLoc(),
++            diag::err_opencl_enqueue_kernel_invalid_local_size_type);
++     return true;
++   }
++   // Potentially emit standard warnings for implicit conversions if enabled
++   // using -Wconversion.
++   CheckImplicitConversion(S, E, IntT, E->getBeginLoc());
++   return false;
++ }
++ 
++ // Helper function for Sema::DiagnoseAlwaysNonNullPointer.
++ // Returns true when emitting a warning about taking the address of a reference.
++ static bool CheckForReference(Sema &SemaRef, const Expr *E,
++                               const PartialDiagnostic &PD) {
++   E = E->IgnoreParenImpCasts();
++ 
++   const FunctionDecl *FD = nullptr;
++ 
++   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
++     if (!DRE->getDecl()->getType()->isReferenceType())
++       return false;
++   } else if (const MemberExpr *M = dyn_cast<MemberExpr>(E)) {
++     if (!M->getMemberDecl()->getType()->isReferenceType())
++       return false;
++   } else if (const CallExpr *Call = dyn_cast<CallExpr>(E)) {
++     if (!Call->getCallReturnType(SemaRef.Context)->isReferenceType())
++       return false;
++     FD = Call->getDirectCallee();
++   } else {
++     return false;
++   }
++ 
++   SemaRef.Diag(E->getExprLoc(), PD);
++ 
++   // If possible, point to location of function.
++   if (FD) {
++     SemaRef.Diag(FD->getLocation(), diag::note_reference_is_return_value) << FD;
++   }
++ 
++   return true;
++ }
++ 
++ // Returns true if the SourceLocation is expanded from any macro body.
++ // Returns false if the SourceLocation is invalid, is from not in a macro
++ // expansion, or is from expanded from a top-level macro argument.
++ static bool IsInAnyMacroBody(const SourceManager &SM, SourceLocation Loc) {
++   if (Loc.isInvalid())
++     return false;
++ 
++   while (Loc.isMacroID()) {
++     if (SM.isMacroBodyExpansion(Loc))
++       return true;
++     Loc = SM.getImmediateMacroCallerLoc(Loc);
++   }
++ 
++   return false;
++ }
++ 
++ /// Diagnose pointers that are always non-null.
++ /// \param E the expression containing the pointer
++ /// \param NullKind NPCK_NotNull if E is a cast to bool, otherwise, E is
++ /// compared to a null pointer
++ /// \param IsEqual True when the comparison is equal to a null pointer
++ /// \param Range Extra SourceRange to highlight in the diagnostic
++ void Sema::DiagnoseAlwaysNonNullPointer(Expr *E,
++                                         Expr::NullPointerConstantKind NullKind,
++                                         bool IsEqual, SourceRange Range) {
++   if (!E)
++     return;
++ 
++   // Don't warn inside macros.
++   if (E->getExprLoc().isMacroID()) {
++     const SourceManager &SM = getSourceManager();
++     if (IsInAnyMacroBody(SM, E->getExprLoc()) ||
++         IsInAnyMacroBody(SM, Range.getBegin()))
++       return;
++   }
++   E = E->IgnoreImpCasts();
++ 
++   const bool IsCompare = NullKind != Expr::NPCK_NotNull;
++ 
++   if (isa<CXXThisExpr>(E)) {
++     unsigned DiagID = IsCompare ? diag::warn_this_null_compare
++                                 : diag::warn_this_bool_conversion;
++     Diag(E->getExprLoc(), DiagID) << E->getSourceRange() << Range << IsEqual;
++     return;
++   }
++ 
++   bool IsAddressOf = false;
++ 
++   if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
++     if (UO->getOpcode() != UO_AddrOf)
++       return;
++     IsAddressOf = true;
++     E = UO->getSubExpr();
++   }
++ 
++   if (IsAddressOf) {
++     unsigned DiagID = IsCompare
++                           ? diag::warn_address_of_reference_null_compare
++                           : diag::warn_address_of_reference_bool_conversion;
++     PartialDiagnostic PD = PDiag(DiagID) << E->getSourceRange() << Range
++                                          << IsEqual;
++     if (CheckForReference(*this, E, PD)) {
++       return;
++     }
++   }
++ 
++   auto ComplainAboutNonnullParamOrCall = [&](const Attr *NonnullAttr) {
++     bool IsParam = isa<NonNullAttr>(NonnullAttr);
++     std::string Str;
++     llvm::raw_string_ostream S(Str);
++     E->printPretty(S, nullptr, getPrintingPolicy());
++     unsigned DiagID = IsCompare ? diag::warn_nonnull_expr_compare
++                                 : diag::warn_cast_nonnull_to_bool;
++     Diag(E->getExprLoc(), DiagID) << IsParam << S.str()
++       << E->getSourceRange() << Range << IsEqual;
++     Diag(NonnullAttr->getLocation(), diag::note_declared_nonnull) << IsParam;
++   };
++ 
++   // If we have a CallExpr that is tagged with returns_nonnull, we can complain.
++   if (auto *Call = dyn_cast<CallExpr>(E->IgnoreParenImpCasts())) {
++     if (auto *Callee = Call->getDirectCallee()) {
++       if (const Attr *A = Callee->getAttr<ReturnsNonNullAttr>()) {
++         ComplainAboutNonnullParamOrCall(A);
++         return;
++       }
++     }
++   }
++ 
++   // Expect to find a single Decl.  Skip anything more complicated.
++   ValueDecl *D = nullptr;
++   if (DeclRefExpr *R = dyn_cast<DeclRefExpr>(E)) {
++     D = R->getDecl();
++   } else if (MemberExpr *M = dyn_cast<MemberExpr>(E)) {
++     D = M->getMemberDecl();
++   }
++ 
++   // Weak Decls can be null.
++   if (!D || D->isWeak())
++     return;
++ 
++   // Check for parameter decl with nonnull attribute
++   if (const auto* PV = dyn_cast<ParmVarDecl>(D)) {
++     if (getCurFunction() &&
++         !getCurFunction()->ModifiedNonNullParams.count(PV)) {
++       if (const Attr *A = PV->getAttr<NonNullAttr>()) {
++         ComplainAboutNonnullParamOrCall(A);
++         return;
++       }
++ 
++       if (const auto *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) {
++         // Skip function template not specialized yet.
++         if (FD->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate)
++           return;
++         auto ParamIter = llvm::find(FD->parameters(), PV);
++         assert(ParamIter != FD->param_end());
++         unsigned ParamNo = std::distance(FD->param_begin(), ParamIter);
++ 
++         for (const auto *NonNull : FD->specific_attrs<NonNullAttr>()) {
++           if (!NonNull->args_size()) {
++               ComplainAboutNonnullParamOrCall(NonNull);
++               return;
++           }
++ 
++           for (const ParamIdx &ArgNo : NonNull->args()) {
++             if (ArgNo.getASTIndex() == ParamNo) {
++               ComplainAboutNonnullParamOrCall(NonNull);
++               return;
++             }
++           }
++         }
++       }
++     }
++   }
++ 
++   QualType T = D->getType();
++   const bool IsArray = T->isArrayType();
++   const bool IsFunction = T->isFunctionType();
++ 
++   // Address of function is used to silence the function warning.
++   if (IsAddressOf && IsFunction) {
++     return;
++   }
++ 
++   // Found nothing.
++   if (!IsAddressOf && !IsFunction && !IsArray)
++     return;
++ 
++   // Pretty print the expression for the diagnostic.
++   std::string Str;
++   llvm::raw_string_ostream S(Str);
++   E->printPretty(S, nullptr, getPrintingPolicy());
++ 
++   unsigned DiagID = IsCompare ? diag::warn_null_pointer_compare
++                               : diag::warn_impcast_pointer_to_bool;
++   enum {
++     AddressOf,
++     FunctionPointer,
++     ArrayPointer
++   } DiagType;
++   if (IsAddressOf)
++     DiagType = AddressOf;
++   else if (IsFunction)
++     DiagType = FunctionPointer;
++   else if (IsArray)
++     DiagType = ArrayPointer;
++   else
++     llvm_unreachable("Could not determine diagnostic.");
++   Diag(E->getExprLoc(), DiagID) << DiagType << S.str() << E->getSourceRange()
++                                 << Range << IsEqual;
++ 
++   if (!IsFunction)
++     return;
++ 
++   // Suggest '&' to silence the function warning.
++   Diag(E->getExprLoc(), diag::note_function_warning_silence)
++       << FixItHint::CreateInsertion(E->getBeginLoc(), "&");
++ 
++   // Check to see if '()' fixit should be emitted.
++   QualType ReturnType;
++   UnresolvedSet<4> NonTemplateOverloads;
++   tryExprAsCall(*E, ReturnType, NonTemplateOverloads);
++   if (ReturnType.isNull())
++     return;
++ 
++   if (IsCompare) {
++     // There are two cases here.  If there is null constant, the only suggest
++     // for a pointer return type.  If the null is 0, then suggest if the return
++     // type is a pointer or an integer type.
++     if (!ReturnType->isPointerType()) {
++       if (NullKind == Expr::NPCK_ZeroExpression ||
++           NullKind == Expr::NPCK_ZeroLiteral) {
++         if (!ReturnType->isIntegerType())
++           return;
++       } else {
++         return;
++       }
++     }
++   } else { // !IsCompare
++     // For function to bool, only suggest if the function pointer has bool
++     // return type.
++     if (!ReturnType->isSpecificBuiltinType(BuiltinType::Bool))
++       return;
++   }
++   Diag(E->getExprLoc(), diag::note_function_to_function_call)
++       << FixItHint::CreateInsertion(getLocForEndOfToken(E->getEndLoc()), "()");
++ }
++ 
++ /// Diagnoses "dangerous" implicit conversions within the given
++ /// expression (which is a full expression).  Implements -Wconversion
++ /// and -Wsign-compare.
++ ///
++ /// \param CC the "context" location of the implicit conversion, i.e.
++ ///   the most location of the syntactic entity requiring the implicit
++ ///   conversion
++ void Sema::CheckImplicitConversions(Expr *E, SourceLocation CC) {
++   // Don't diagnose in unevaluated contexts.
++   if (isUnevaluatedContext())
++     return;
++ 
++   // Don't diagnose for value- or type-dependent expressions.
++   if (E->isTypeDependent() || E->isValueDependent())
++     return;
++ 
++   // Check for array bounds violations in cases where the check isn't triggered
++   // elsewhere for other Expr types (like BinaryOperators), e.g. when an
++   // ArraySubscriptExpr is on the RHS of a variable initialization.
++   CheckArrayAccess(E);
++ 
++   // This is not the right CC for (e.g.) a variable initialization.
++   AnalyzeImplicitConversions(*this, E, CC);
++ }
++ 
++ /// CheckBoolLikeConversion - Check conversion of given expression to boolean.
++ /// Input argument E is a logical expression.
++ void Sema::CheckBoolLikeConversion(Expr *E, SourceLocation CC) {
++   ::CheckBoolLikeConversion(*this, E, CC);
++ }
++ 
++ /// Diagnose when expression is an integer constant expression and its evaluation
++ /// results in integer overflow
++ void Sema::CheckForIntOverflow (Expr *E) {
++   // Use a work list to deal with nested struct initializers.
++   SmallVector<Expr *, 2> Exprs(1, E);
++ 
++   do {
++     Expr *OriginalE = Exprs.pop_back_val();
++     Expr *E = OriginalE->IgnoreParenCasts();
++ 
++     if (isa<BinaryOperator>(E)) {
++       E->EvaluateForOverflow(Context);
++       continue;
++     }
++ 
++     if (auto InitList = dyn_cast<InitListExpr>(OriginalE))
++       Exprs.append(InitList->inits().begin(), InitList->inits().end());
++     else if (isa<ObjCBoxedExpr>(OriginalE))
++       E->EvaluateForOverflow(Context);
++     else if (auto Call = dyn_cast<CallExpr>(E))
++       Exprs.append(Call->arg_begin(), Call->arg_end());
++     else if (auto Message = dyn_cast<ObjCMessageExpr>(E))
++       Exprs.append(Message->arg_begin(), Message->arg_end());
++   } while (!Exprs.empty());
++ }
++ 
++ namespace {
++ 
++ /// Visitor for expressions which looks for unsequenced operations on the
++ /// same object.
++ class SequenceChecker : public ConstEvaluatedExprVisitor<SequenceChecker> {
++   using Base = ConstEvaluatedExprVisitor<SequenceChecker>;
++ 
++   /// A tree of sequenced regions within an expression. Two regions are
++   /// unsequenced if one is an ancestor or a descendent of the other. When we
++   /// finish processing an expression with sequencing, such as a comma
++   /// expression, we fold its tree nodes into its parent, since they are
++   /// unsequenced with respect to nodes we will visit later.
++   class SequenceTree {
++     struct Value {
++       explicit Value(unsigned Parent) : Parent(Parent), Merged(false) {}
++       unsigned Parent : 31;
++       unsigned Merged : 1;
++     };
++     SmallVector<Value, 8> Values;
++ 
++   public:
++     /// A region within an expression which may be sequenced with respect
++     /// to some other region.
++     class Seq {
++       friend class SequenceTree;
++ 
++       unsigned Index;
++ 
++       explicit Seq(unsigned N) : Index(N) {}
++ 
++     public:
++       Seq() : Index(0) {}
++     };
++ 
++     SequenceTree() { Values.push_back(Value(0)); }
++     Seq root() const { return Seq(0); }
++ 
++     /// Create a new sequence of operations, which is an unsequenced
++     /// subset of \p Parent. This sequence of operations is sequenced with
++     /// respect to other children of \p Parent.
++     Seq allocate(Seq Parent) {
++       Values.push_back(Value(Parent.Index));
++       return Seq(Values.size() - 1);
++     }
++ 
++     /// Merge a sequence of operations into its parent.
++     void merge(Seq S) {
++       Values[S.Index].Merged = true;
++     }
++ 
++     /// Determine whether two operations are unsequenced. This operation
++     /// is asymmetric: \p Cur should be the more recent sequence, and \p Old
++     /// should have been merged into its parent as appropriate.
++     bool isUnsequenced(Seq Cur, Seq Old) {
++       unsigned C = representative(Cur.Index);
++       unsigned Target = representative(Old.Index);
++       while (C >= Target) {
++         if (C == Target)
++           return true;
++         C = Values[C].Parent;
++       }
++       return false;
++     }
++ 
++   private:
++     /// Pick a representative for a sequence.
++     unsigned representative(unsigned K) {
++       if (Values[K].Merged)
++         // Perform path compression as we go.
++         return Values[K].Parent = representative(Values[K].Parent);
++       return K;
++     }
++   };
++ 
++   /// An object for which we can track unsequenced uses.
++   using Object = const NamedDecl *;
++ 
++   /// Different flavors of object usage which we track. We only track the
++   /// least-sequenced usage of each kind.
++   enum UsageKind {
++     /// A read of an object. Multiple unsequenced reads are OK.
++     UK_Use,
++ 
++     /// A modification of an object which is sequenced before the value
++     /// computation of the expression, such as ++n in C++.
++     UK_ModAsValue,
++ 
++     /// A modification of an object which is not sequenced before the value
++     /// computation of the expression, such as n++.
++     UK_ModAsSideEffect,
++ 
++     UK_Count = UK_ModAsSideEffect + 1
++   };
++ 
++   /// Bundle together a sequencing region and the expression corresponding
++   /// to a specific usage. One Usage is stored for each usage kind in UsageInfo.
++   struct Usage {
++     const Expr *UsageExpr;
++     SequenceTree::Seq Seq;
++ 
++     Usage() : UsageExpr(nullptr), Seq() {}
++   };
++ 
++   struct UsageInfo {
++     Usage Uses[UK_Count];
++ 
++     /// Have we issued a diagnostic for this object already?
++     bool Diagnosed;
++ 
++     UsageInfo() : Uses(), Diagnosed(false) {}
++   };
++   using UsageInfoMap = llvm::SmallDenseMap<Object, UsageInfo, 16>;
++ 
++   Sema &SemaRef;
++ 
++   /// Sequenced regions within the expression.
++   SequenceTree Tree;
++ 
++   /// Declaration modifications and references which we have seen.
++   UsageInfoMap UsageMap;
++ 
++   /// The region we are currently within.
++   SequenceTree::Seq Region;
++ 
++   /// Filled in with declarations which were modified as a side-effect
++   /// (that is, post-increment operations).
++   SmallVectorImpl<std::pair<Object, Usage>> *ModAsSideEffect = nullptr;
++ 
++   /// Expressions to check later. We defer checking these to reduce
++   /// stack usage.
++   SmallVectorImpl<const Expr *> &WorkList;
++ 
++   /// RAII object wrapping the visitation of a sequenced subexpression of an
++   /// expression. At the end of this process, the side-effects of the evaluation
++   /// become sequenced with respect to the value computation of the result, so
++   /// we downgrade any UK_ModAsSideEffect within the evaluation to
++   /// UK_ModAsValue.
++   struct SequencedSubexpression {
++     SequencedSubexpression(SequenceChecker &Self)
++       : Self(Self), OldModAsSideEffect(Self.ModAsSideEffect) {
++       Self.ModAsSideEffect = &ModAsSideEffect;
++     }
++ 
++     ~SequencedSubexpression() {
++       for (const std::pair<Object, Usage> &M : llvm::reverse(ModAsSideEffect)) {
++         // Add a new usage with usage kind UK_ModAsValue, and then restore
++         // the previous usage with UK_ModAsSideEffect (thus clearing it if
++         // the previous one was empty).
++         UsageInfo &UI = Self.UsageMap[M.first];
++         auto &SideEffectUsage = UI.Uses[UK_ModAsSideEffect];
++         Self.addUsage(M.first, UI, SideEffectUsage.UsageExpr, UK_ModAsValue);
++         SideEffectUsage = M.second;
++       }
++       Self.ModAsSideEffect = OldModAsSideEffect;
++     }
++ 
++     SequenceChecker &Self;
++     SmallVector<std::pair<Object, Usage>, 4> ModAsSideEffect;
++     SmallVectorImpl<std::pair<Object, Usage>> *OldModAsSideEffect;
++   };
++ 
++   /// RAII object wrapping the visitation of a subexpression which we might
++   /// choose to evaluate as a constant. If any subexpression is evaluated and
++   /// found to be non-constant, this allows us to suppress the evaluation of
++   /// the outer expression.
++   class EvaluationTracker {
++   public:
++     EvaluationTracker(SequenceChecker &Self)
++         : Self(Self), Prev(Self.EvalTracker) {
++       Self.EvalTracker = this;
++     }
++ 
++     ~EvaluationTracker() {
++       Self.EvalTracker = Prev;
++       if (Prev)
++         Prev->EvalOK &= EvalOK;
++     }
++ 
++     bool evaluate(const Expr *E, bool &Result) {
++       if (!EvalOK || E->isValueDependent())
++         return false;
++       EvalOK = E->EvaluateAsBooleanCondition(
++           Result, Self.SemaRef.Context, Self.SemaRef.isConstantEvaluated());
++       return EvalOK;
++     }
++ 
++   private:
++     SequenceChecker &Self;
++     EvaluationTracker *Prev;
++     bool EvalOK = true;
++   } *EvalTracker = nullptr;
++ 
++   /// Find the object which is produced by the specified expression,
++   /// if any.
++   Object getObject(const Expr *E, bool Mod) const {
++     E = E->IgnoreParenCasts();
++     if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
++       if (Mod && (UO->getOpcode() == UO_PreInc || UO->getOpcode() == UO_PreDec))
++         return getObject(UO->getSubExpr(), Mod);
++     } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
++       if (BO->getOpcode() == BO_Comma)
++         return getObject(BO->getRHS(), Mod);
++       if (Mod && BO->isAssignmentOp())
++         return getObject(BO->getLHS(), Mod);
++     } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
++       // FIXME: Check for more interesting cases, like "x.n = ++x.n".
++       if (isa<CXXThisExpr>(ME->getBase()->IgnoreParenCasts()))
++         return ME->getMemberDecl();
++     } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
++       // FIXME: If this is a reference, map through to its value.
++       return DRE->getDecl();
++     return nullptr;
++   }
++ 
++   /// Note that an object \p O was modified or used by an expression
++   /// \p UsageExpr with usage kind \p UK. \p UI is the \p UsageInfo for
++   /// the object \p O as obtained via the \p UsageMap.
++   void addUsage(Object O, UsageInfo &UI, const Expr *UsageExpr, UsageKind UK) {
++     // Get the old usage for the given object and usage kind.
++     Usage &U = UI.Uses[UK];
++     if (!U.UsageExpr || !Tree.isUnsequenced(Region, U.Seq)) {
++       // If we have a modification as side effect and are in a sequenced
++       // subexpression, save the old Usage so that we can restore it later
++       // in SequencedSubexpression::~SequencedSubexpression.
++       if (UK == UK_ModAsSideEffect && ModAsSideEffect)
++         ModAsSideEffect->push_back(std::make_pair(O, U));
++       // Then record the new usage with the current sequencing region.
++       U.UsageExpr = UsageExpr;
++       U.Seq = Region;
++     }
++   }
++ 
++   /// Check whether a modification or use of an object \p O in an expression
++   /// \p UsageExpr conflicts with a prior usage of kind \p OtherKind. \p UI is
++   /// the \p UsageInfo for the object \p O as obtained via the \p UsageMap.
++   /// \p IsModMod is true when we are checking for a mod-mod unsequenced
++   /// usage and false we are checking for a mod-use unsequenced usage.
++   void checkUsage(Object O, UsageInfo &UI, const Expr *UsageExpr,
++                   UsageKind OtherKind, bool IsModMod) {
++     if (UI.Diagnosed)
++       return;
++ 
++     const Usage &U = UI.Uses[OtherKind];
++     if (!U.UsageExpr || !Tree.isUnsequenced(Region, U.Seq))
++       return;
++ 
++     const Expr *Mod = U.UsageExpr;
++     const Expr *ModOrUse = UsageExpr;
++     if (OtherKind == UK_Use)
++       std::swap(Mod, ModOrUse);
++ 
++     SemaRef.DiagRuntimeBehavior(
++         Mod->getExprLoc(), {Mod, ModOrUse},
++         SemaRef.PDiag(IsModMod ? diag::warn_unsequenced_mod_mod
++                                : diag::warn_unsequenced_mod_use)
++             << O << SourceRange(ModOrUse->getExprLoc()));
++     UI.Diagnosed = true;
++   }
++ 
++   // A note on note{Pre, Post}{Use, Mod}:
++   //
++   // (It helps to follow the algorithm with an expression such as
++   //  "((++k)++, k) = k" or "k = (k++, k++)". Both contain unsequenced
++   //  operations before C++17 and both are well-defined in C++17).
++   //
++   // When visiting a node which uses/modify an object we first call notePreUse
++   // or notePreMod before visiting its sub-expression(s). At this point the
++   // children of the current node have not yet been visited and so the eventual
++   // uses/modifications resulting from the children of the current node have not
++   // been recorded yet.
++   //
++   // We then visit the children of the current node. After that notePostUse or
++   // notePostMod is called. These will 1) detect an unsequenced modification
++   // as side effect (as in "k++ + k") and 2) add a new usage with the
++   // appropriate usage kind.
++   //
++   // We also have to be careful that some operation sequences modification as
++   // side effect as well (for example: || or ,). To account for this we wrap
++   // the visitation of such a sub-expression (for example: the LHS of || or ,)
++   // with SequencedSubexpression. SequencedSubexpression is an RAII object
++   // which record usages which are modifications as side effect, and then
++   // downgrade them (or more accurately restore the previous usage which was a
++   // modification as side effect) when exiting the scope of the sequenced
++   // subexpression.
++ 
++   void notePreUse(Object O, const Expr *UseExpr) {
++     UsageInfo &UI = UsageMap[O];
++     // Uses conflict with other modifications.
++     checkUsage(O, UI, UseExpr, /*OtherKind=*/UK_ModAsValue, /*IsModMod=*/false);
++   }
++ 
++   void notePostUse(Object O, const Expr *UseExpr) {
++     UsageInfo &UI = UsageMap[O];
++     checkUsage(O, UI, UseExpr, /*OtherKind=*/UK_ModAsSideEffect,
++                /*IsModMod=*/false);
++     addUsage(O, UI, UseExpr, /*UsageKind=*/UK_Use);
++   }
++ 
++   void notePreMod(Object O, const Expr *ModExpr) {
++     UsageInfo &UI = UsageMap[O];
++     // Modifications conflict with other modifications and with uses.
++     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_ModAsValue, /*IsModMod=*/true);
++     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_Use, /*IsModMod=*/false);
++   }
++ 
++   void notePostMod(Object O, const Expr *ModExpr, UsageKind UK) {
++     UsageInfo &UI = UsageMap[O];
++     checkUsage(O, UI, ModExpr, /*OtherKind=*/UK_ModAsSideEffect,
++                /*IsModMod=*/true);
++     addUsage(O, UI, ModExpr, /*UsageKind=*/UK);
++   }
++ 
++ public:
++   SequenceChecker(Sema &S, const Expr *E,
++                   SmallVectorImpl<const Expr *> &WorkList)
++       : Base(S.Context), SemaRef(S), Region(Tree.root()), WorkList(WorkList) {
++     Visit(E);
++     // Silence a -Wunused-private-field since WorkList is now unused.
++     // TODO: Evaluate if it can be used, and if not remove it.
++     (void)this->WorkList;
++   }
++ 
++   void VisitStmt(const Stmt *S) {
++     // Skip all statements which aren't expressions for now.
++   }
++ 
++   void VisitExpr(const Expr *E) {
++     // By default, just recurse to evaluated subexpressions.
++     Base::VisitStmt(E);
++   }
++ 
++   void VisitCastExpr(const CastExpr *E) {
++     Object O = Object();
++     if (E->getCastKind() == CK_LValueToRValue)
++       O = getObject(E->getSubExpr(), false);
++ 
++     if (O)
++       notePreUse(O, E);
++     VisitExpr(E);
++     if (O)
++       notePostUse(O, E);
++   }
++ 
++   void VisitSequencedExpressions(const Expr *SequencedBefore,
++                                  const Expr *SequencedAfter) {
++     SequenceTree::Seq BeforeRegion = Tree.allocate(Region);
++     SequenceTree::Seq AfterRegion = Tree.allocate(Region);
++     SequenceTree::Seq OldRegion = Region;
++ 
++     {
++       SequencedSubexpression SeqBefore(*this);
++       Region = BeforeRegion;
++       Visit(SequencedBefore);
++     }
++ 
++     Region = AfterRegion;
++     Visit(SequencedAfter);
++ 
++     Region = OldRegion;
++ 
++     Tree.merge(BeforeRegion);
++     Tree.merge(AfterRegion);
++   }
++ 
++   void VisitArraySubscriptExpr(const ArraySubscriptExpr *ASE) {
++     // C++17 [expr.sub]p1:
++     //   The expression E1[E2] is identical (by definition) to *((E1)+(E2)). The
++     //   expression E1 is sequenced before the expression E2.
++     if (SemaRef.getLangOpts().CPlusPlus17)
++       VisitSequencedExpressions(ASE->getLHS(), ASE->getRHS());
++     else {
++       Visit(ASE->getLHS());
++       Visit(ASE->getRHS());
++     }
++   }
++ 
++   void VisitBinPtrMemD(const BinaryOperator *BO) { VisitBinPtrMem(BO); }
++   void VisitBinPtrMemI(const BinaryOperator *BO) { VisitBinPtrMem(BO); }
++   void VisitBinPtrMem(const BinaryOperator *BO) {
++     // C++17 [expr.mptr.oper]p4:
++     //  Abbreviating pm-expression.*cast-expression as E1.*E2, [...]
++     //  the expression E1 is sequenced before the expression E2.
++     if (SemaRef.getLangOpts().CPlusPlus17)
++       VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
++     else {
++       Visit(BO->getLHS());
++       Visit(BO->getRHS());
++     }
++   }
++ 
++   void VisitBinShl(const BinaryOperator *BO) { VisitBinShlShr(BO); }
++   void VisitBinShr(const BinaryOperator *BO) { VisitBinShlShr(BO); }
++   void VisitBinShlShr(const BinaryOperator *BO) {
++     // C++17 [expr.shift]p4:
++     //  The expression E1 is sequenced before the expression E2.
++     if (SemaRef.getLangOpts().CPlusPlus17)
++       VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
++     else {
++       Visit(BO->getLHS());
++       Visit(BO->getRHS());
++     }
++   }
++ 
++   void VisitBinComma(const BinaryOperator *BO) {
++     // C++11 [expr.comma]p1:
++     //   Every value computation and side effect associated with the left
++     //   expression is sequenced before every value computation and side
++     //   effect associated with the right expression.
++     VisitSequencedExpressions(BO->getLHS(), BO->getRHS());
++   }
++ 
++   void VisitBinAssign(const BinaryOperator *BO) {
++     SequenceTree::Seq RHSRegion;
++     SequenceTree::Seq LHSRegion;
++     if (SemaRef.getLangOpts().CPlusPlus17) {
++       RHSRegion = Tree.allocate(Region);
++       LHSRegion = Tree.allocate(Region);
++     } else {
++       RHSRegion = Region;
++       LHSRegion = Region;
++     }
++     SequenceTree::Seq OldRegion = Region;
++ 
++     // C++11 [expr.ass]p1:
++     //  [...] the assignment is sequenced after the value computation
++     //  of the right and left operands, [...]
++     //
++     // so check it before inspecting the operands and update the
++     // map afterwards.
++     Object O = getObject(BO->getLHS(), /*Mod=*/true);
++     if (O)
++       notePreMod(O, BO);
++ 
++     if (SemaRef.getLangOpts().CPlusPlus17) {
++       // C++17 [expr.ass]p1:
++       //  [...] The right operand is sequenced before the left operand. [...]
++       {
++         SequencedSubexpression SeqBefore(*this);
++         Region = RHSRegion;
++         Visit(BO->getRHS());
++       }
++ 
++       Region = LHSRegion;
++       Visit(BO->getLHS());
++ 
++       if (O && isa<CompoundAssignOperator>(BO))
++         notePostUse(O, BO);
++ 
++     } else {
++       // C++11 does not specify any sequencing between the LHS and RHS.
++       Region = LHSRegion;
++       Visit(BO->getLHS());
++ 
++       if (O && isa<CompoundAssignOperator>(BO))
++         notePostUse(O, BO);
++ 
++       Region = RHSRegion;
++       Visit(BO->getRHS());
++     }
++ 
++     // C++11 [expr.ass]p1:
++     //  the assignment is sequenced [...] before the value computation of the
++     //  assignment expression.
++     // C11 6.5.16/3 has no such rule.
++     Region = OldRegion;
++     if (O)
++       notePostMod(O, BO,
++                   SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
++                                                   : UK_ModAsSideEffect);
++     if (SemaRef.getLangOpts().CPlusPlus17) {
++       Tree.merge(RHSRegion);
++       Tree.merge(LHSRegion);
++     }
++   }
++ 
++   void VisitCompoundAssignOperator(const CompoundAssignOperator *CAO) {
++     VisitBinAssign(CAO);
++   }
++ 
++   void VisitUnaryPreInc(const UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
++   void VisitUnaryPreDec(const UnaryOperator *UO) { VisitUnaryPreIncDec(UO); }
++   void VisitUnaryPreIncDec(const UnaryOperator *UO) {
++     Object O = getObject(UO->getSubExpr(), true);
++     if (!O)
++       return VisitExpr(UO);
++ 
++     notePreMod(O, UO);
++     Visit(UO->getSubExpr());
++     // C++11 [expr.pre.incr]p1:
++     //   the expression ++x is equivalent to x+=1
++     notePostMod(O, UO,
++                 SemaRef.getLangOpts().CPlusPlus ? UK_ModAsValue
++                                                 : UK_ModAsSideEffect);
++   }
++ 
++   void VisitUnaryPostInc(const UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
++   void VisitUnaryPostDec(const UnaryOperator *UO) { VisitUnaryPostIncDec(UO); }
++   void VisitUnaryPostIncDec(const UnaryOperator *UO) {
++     Object O = getObject(UO->getSubExpr(), true);
++     if (!O)
++       return VisitExpr(UO);
++ 
++     notePreMod(O, UO);
++     Visit(UO->getSubExpr());
++     notePostMod(O, UO, UK_ModAsSideEffect);
++   }
++ 
++   void VisitBinLOr(const BinaryOperator *BO) {
++     // C++11 [expr.log.or]p2:
++     //  If the second expression is evaluated, every value computation and
++     //  side effect associated with the first expression is sequenced before
++     //  every value computation and side effect associated with the
++     //  second expression.
++     SequenceTree::Seq LHSRegion = Tree.allocate(Region);
++     SequenceTree::Seq RHSRegion = Tree.allocate(Region);
++     SequenceTree::Seq OldRegion = Region;
++ 
++     EvaluationTracker Eval(*this);
++     {
++       SequencedSubexpression Sequenced(*this);
++       Region = LHSRegion;
++       Visit(BO->getLHS());
++     }
++ 
++     // C++11 [expr.log.or]p1:
++     //  [...] the second operand is not evaluated if the first operand
++     //  evaluates to true.
++     bool EvalResult = false;
++     bool EvalOK = Eval.evaluate(BO->getLHS(), EvalResult);
++     bool ShouldVisitRHS = !EvalOK || (EvalOK && !EvalResult);
++     if (ShouldVisitRHS) {
++       Region = RHSRegion;
++       Visit(BO->getRHS());
++     }
++ 
++     Region = OldRegion;
++     Tree.merge(LHSRegion);
++     Tree.merge(RHSRegion);
++   }
++ 
++   void VisitBinLAnd(const BinaryOperator *BO) {
++     // C++11 [expr.log.and]p2:
++     //  If the second expression is evaluated, every value computation and
++     //  side effect associated with the first expression is sequenced before
++     //  every value computation and side effect associated with the
++     //  second expression.
++     SequenceTree::Seq LHSRegion = Tree.allocate(Region);
++     SequenceTree::Seq RHSRegion = Tree.allocate(Region);
++     SequenceTree::Seq OldRegion = Region;
++ 
++     EvaluationTracker Eval(*this);
++     {
++       SequencedSubexpression Sequenced(*this);
++       Region = LHSRegion;
++       Visit(BO->getLHS());
++     }
++ 
++     // C++11 [expr.log.and]p1:
++     //  [...] the second operand is not evaluated if the first operand is false.
++     bool EvalResult = false;
++     bool EvalOK = Eval.evaluate(BO->getLHS(), EvalResult);
++     bool ShouldVisitRHS = !EvalOK || (EvalOK && EvalResult);
++     if (ShouldVisitRHS) {
++       Region = RHSRegion;
++       Visit(BO->getRHS());
++     }
++ 
++     Region = OldRegion;
++     Tree.merge(LHSRegion);
++     Tree.merge(RHSRegion);
++   }
++ 
++   void VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO) {
++     // C++11 [expr.cond]p1:
++     //  [...] Every value computation and side effect associated with the first
++     //  expression is sequenced before every value computation and side effect
++     //  associated with the second or third expression.
++     SequenceTree::Seq ConditionRegion = Tree.allocate(Region);
++ 
++     // No sequencing is specified between the true and false expression.
++     // However since exactly one of both is going to be evaluated we can
++     // consider them to be sequenced. This is needed to avoid warning on
++     // something like "x ? y+= 1 : y += 2;" in the case where we will visit
++     // both the true and false expressions because we can't evaluate x.
++     // This will still allow us to detect an expression like (pre C++17)
++     // "(x ? y += 1 : y += 2) = y".
++     //
++     // We don't wrap the visitation of the true and false expression with
++     // SequencedSubexpression because we don't want to downgrade modifications
++     // as side effect in the true and false expressions after the visition
++     // is done. (for example in the expression "(x ? y++ : y++) + y" we should
++     // not warn between the two "y++", but we should warn between the "y++"
++     // and the "y".
++     SequenceTree::Seq TrueRegion = Tree.allocate(Region);
++     SequenceTree::Seq FalseRegion = Tree.allocate(Region);
++     SequenceTree::Seq OldRegion = Region;
++ 
++     EvaluationTracker Eval(*this);
++     {
++       SequencedSubexpression Sequenced(*this);
++       Region = ConditionRegion;
++       Visit(CO->getCond());
++     }
++ 
++     // C++11 [expr.cond]p1:
++     // [...] The first expression is contextually converted to bool (Clause 4).
++     // It is evaluated and if it is true, the result of the conditional
++     // expression is the value of the second expression, otherwise that of the
++     // third expression. Only one of the second and third expressions is
++     // evaluated. [...]
++     bool EvalResult = false;
++     bool EvalOK = Eval.evaluate(CO->getCond(), EvalResult);
++     bool ShouldVisitTrueExpr = !EvalOK || (EvalOK && EvalResult);
++     bool ShouldVisitFalseExpr = !EvalOK || (EvalOK && !EvalResult);
++     if (ShouldVisitTrueExpr) {
++       Region = TrueRegion;
++       Visit(CO->getTrueExpr());
++     }
++     if (ShouldVisitFalseExpr) {
++       Region = FalseRegion;
++       Visit(CO->getFalseExpr());
++     }
++ 
++     Region = OldRegion;
++     Tree.merge(ConditionRegion);
++     Tree.merge(TrueRegion);
++     Tree.merge(FalseRegion);
++   }
++ 
++   void VisitCallExpr(const CallExpr *CE) {
++     // FIXME: CXXNewExpr and CXXDeleteExpr implicitly call functions.
++ 
++     if (CE->isUnevaluatedBuiltinCall(Context))
++       return;
++ 
++     // C++11 [intro.execution]p15:
++     //   When calling a function [...], every value computation and side effect
++     //   associated with any argument expression, or with the postfix expression
++     //   designating the called function, is sequenced before execution of every
++     //   expression or statement in the body of the function [and thus before
++     //   the value computation of its result].
++     SequencedSubexpression Sequenced(*this);
++     SemaRef.runWithSufficientStackSpace(CE->getExprLoc(), [&] {
++       // C++17 [expr.call]p5
++       //   The postfix-expression is sequenced before each expression in the
++       //   expression-list and any default argument. [...]
++       SequenceTree::Seq CalleeRegion;
++       SequenceTree::Seq OtherRegion;
++       if (SemaRef.getLangOpts().CPlusPlus17) {
++         CalleeRegion = Tree.allocate(Region);
++         OtherRegion = Tree.allocate(Region);
++       } else {
++         CalleeRegion = Region;
++         OtherRegion = Region;
++       }
++       SequenceTree::Seq OldRegion = Region;
++ 
++       // Visit the callee expression first.
++       Region = CalleeRegion;
++       if (SemaRef.getLangOpts().CPlusPlus17) {
++         SequencedSubexpression Sequenced(*this);
++         Visit(CE->getCallee());
++       } else {
++         Visit(CE->getCallee());
++       }
++ 
++       // Then visit the argument expressions.
++       Region = OtherRegion;
++       for (const Expr *Argument : CE->arguments())
++         Visit(Argument);
++ 
++       Region = OldRegion;
++       if (SemaRef.getLangOpts().CPlusPlus17) {
++         Tree.merge(CalleeRegion);
++         Tree.merge(OtherRegion);
++       }
++     });
++   }
++ 
++   void VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *CXXOCE) {
++     // C++17 [over.match.oper]p2:
++     //   [...] the operator notation is first transformed to the equivalent
++     //   function-call notation as summarized in Table 12 (where @ denotes one
++     //   of the operators covered in the specified subclause). However, the
++     //   operands are sequenced in the order prescribed for the built-in
++     //   operator (Clause 8).
++     //
++     // From the above only overloaded binary operators and overloaded call
++     // operators have sequencing rules in C++17 that we need to handle
++     // separately.
++     if (!SemaRef.getLangOpts().CPlusPlus17 ||
++         (CXXOCE->getNumArgs() != 2 && CXXOCE->getOperator() != OO_Call))
++       return VisitCallExpr(CXXOCE);
++ 
++     enum {
++       NoSequencing,
++       LHSBeforeRHS,
++       RHSBeforeLHS,
++       LHSBeforeRest
++     } SequencingKind;
++     switch (CXXOCE->getOperator()) {
++     case OO_Equal:
++     case OO_PlusEqual:
++     case OO_MinusEqual:
++     case OO_StarEqual:
++     case OO_SlashEqual:
++     case OO_PercentEqual:
++     case OO_CaretEqual:
++     case OO_AmpEqual:
++     case OO_PipeEqual:
++     case OO_LessLessEqual:
++     case OO_GreaterGreaterEqual:
++       SequencingKind = RHSBeforeLHS;
++       break;
++ 
++     case OO_LessLess:
++     case OO_GreaterGreater:
++     case OO_AmpAmp:
++     case OO_PipePipe:
++     case OO_Comma:
++     case OO_ArrowStar:
++     case OO_Subscript:
++       SequencingKind = LHSBeforeRHS;
++       break;
++ 
++     case OO_Call:
++       SequencingKind = LHSBeforeRest;
++       break;
++ 
++     default:
++       SequencingKind = NoSequencing;
++       break;
++     }
++ 
++     if (SequencingKind == NoSequencing)
++       return VisitCallExpr(CXXOCE);
++ 
++     // This is a call, so all subexpressions are sequenced before the result.
++     SequencedSubexpression Sequenced(*this);
++ 
++     SemaRef.runWithSufficientStackSpace(CXXOCE->getExprLoc(), [&] {
++       assert(SemaRef.getLangOpts().CPlusPlus17 &&
++              "Should only get there with C++17 and above!");
++       assert((CXXOCE->getNumArgs() == 2 || CXXOCE->getOperator() == OO_Call) &&
++              "Should only get there with an overloaded binary operator"
++              " or an overloaded call operator!");
++ 
++       if (SequencingKind == LHSBeforeRest) {
++         assert(CXXOCE->getOperator() == OO_Call &&
++                "We should only have an overloaded call operator here!");
++ 
++         // This is very similar to VisitCallExpr, except that we only have the
++         // C++17 case. The postfix-expression is the first argument of the
++         // CXXOperatorCallExpr. The expressions in the expression-list, if any,
++         // are in the following arguments.
++         //
++         // Note that we intentionally do not visit the callee expression since
++         // it is just a decayed reference to a function.
++         SequenceTree::Seq PostfixExprRegion = Tree.allocate(Region);
++         SequenceTree::Seq ArgsRegion = Tree.allocate(Region);
++         SequenceTree::Seq OldRegion = Region;
++ 
++         assert(CXXOCE->getNumArgs() >= 1 &&
++                "An overloaded call operator must have at least one argument"
++                " for the postfix-expression!");
++         const Expr *PostfixExpr = CXXOCE->getArgs()[0];
++         llvm::ArrayRef<const Expr *> Args(CXXOCE->getArgs() + 1,
++                                           CXXOCE->getNumArgs() - 1);
++ 
++         // Visit the postfix-expression first.
++         {
++           Region = PostfixExprRegion;
++           SequencedSubexpression Sequenced(*this);
++           Visit(PostfixExpr);
++         }
++ 
++         // Then visit the argument expressions.
++         Region = ArgsRegion;
++         for (const Expr *Arg : Args)
++           Visit(Arg);
++ 
++         Region = OldRegion;
++         Tree.merge(PostfixExprRegion);
++         Tree.merge(ArgsRegion);
++       } else {
++         assert(CXXOCE->getNumArgs() == 2 &&
++                "Should only have two arguments here!");
++         assert((SequencingKind == LHSBeforeRHS ||
++                 SequencingKind == RHSBeforeLHS) &&
++                "Unexpected sequencing kind!");
++ 
++         // We do not visit the callee expression since it is just a decayed
++         // reference to a function.
++         const Expr *E1 = CXXOCE->getArg(0);
++         const Expr *E2 = CXXOCE->getArg(1);
++         if (SequencingKind == RHSBeforeLHS)
++           std::swap(E1, E2);
++ 
++         return VisitSequencedExpressions(E1, E2);
++       }
++     });
++   }
++ 
++   void VisitCXXConstructExpr(const CXXConstructExpr *CCE) {
++     // This is a call, so all subexpressions are sequenced before the result.
++     SequencedSubexpression Sequenced(*this);
++ 
++     if (!CCE->isListInitialization())
++       return VisitExpr(CCE);
++ 
++     // In C++11, list initializations are sequenced.
++     SmallVector<SequenceTree::Seq, 32> Elts;
++     SequenceTree::Seq Parent = Region;
++     for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(),
++                                               E = CCE->arg_end();
++          I != E; ++I) {
++       Region = Tree.allocate(Parent);
++       Elts.push_back(Region);
++       Visit(*I);
++     }
++ 
++     // Forget that the initializers are sequenced.
++     Region = Parent;
++     for (unsigned I = 0; I < Elts.size(); ++I)
++       Tree.merge(Elts[I]);
++   }
++ 
++   void VisitInitListExpr(const InitListExpr *ILE) {
++     if (!SemaRef.getLangOpts().CPlusPlus11)
++       return VisitExpr(ILE);
++ 
++     // In C++11, list initializations are sequenced.
++     SmallVector<SequenceTree::Seq, 32> Elts;
++     SequenceTree::Seq Parent = Region;
++     for (unsigned I = 0; I < ILE->getNumInits(); ++I) {
++       const Expr *E = ILE->getInit(I);
++       if (!E)
++         continue;
++       Region = Tree.allocate(Parent);
++       Elts.push_back(Region);
++       Visit(E);
++     }
++ 
++     // Forget that the initializers are sequenced.
++     Region = Parent;
++     for (unsigned I = 0; I < Elts.size(); ++I)
++       Tree.merge(Elts[I]);
++   }
++ };
++ 
++ } // namespace
++ 
++ void Sema::CheckUnsequencedOperations(const Expr *E) {
++   SmallVector<const Expr *, 8> WorkList;
++   WorkList.push_back(E);
++   while (!WorkList.empty()) {
++     const Expr *Item = WorkList.pop_back_val();
++     SequenceChecker(*this, Item, WorkList);
++   }
++ }
++ 
++ void Sema::CheckCompletedExpr(Expr *E, SourceLocation CheckLoc,
++                               bool IsConstexpr) {
++   llvm::SaveAndRestore<bool> ConstantContext(
++       isConstantEvaluatedOverride, IsConstexpr || isa<ConstantExpr>(E));
++   CheckImplicitConversions(E, CheckLoc);
++   if (!E->isInstantiationDependent())
++     CheckUnsequencedOperations(E);
++   if (!IsConstexpr && !E->isValueDependent())
++     CheckForIntOverflow(E);
++   DiagnoseMisalignedMembers();
++ }
++ 
++ void Sema::CheckBitFieldInitialization(SourceLocation InitLoc,
++                                        FieldDecl *BitField,
++                                        Expr *Init) {
++   (void) AnalyzeBitFieldAssignment(*this, BitField, Init, InitLoc);
++ }
++ 
++ static void diagnoseArrayStarInParamType(Sema &S, QualType PType,
++                                          SourceLocation Loc) {
++   if (!PType->isVariablyModifiedType())
++     return;
++   if (const auto *PointerTy = dyn_cast<PointerType>(PType)) {
++     diagnoseArrayStarInParamType(S, PointerTy->getPointeeType(), Loc);
++     return;
++   }
++   if (const auto *ReferenceTy = dyn_cast<ReferenceType>(PType)) {
++     diagnoseArrayStarInParamType(S, ReferenceTy->getPointeeType(), Loc);
++     return;
++   }
++   if (const auto *ParenTy = dyn_cast<ParenType>(PType)) {
++     diagnoseArrayStarInParamType(S, ParenTy->getInnerType(), Loc);
++     return;
++   }
++ 
++   const ArrayType *AT = S.Context.getAsArrayType(PType);
++   if (!AT)
++     return;
++ 
++   if (AT->getSizeModifier() != ArrayType::Star) {
++     diagnoseArrayStarInParamType(S, AT->getElementType(), Loc);
++     return;
++   }
++ 
++   S.Diag(Loc, diag::err_array_star_in_function_definition);
++ }
++ 
++ /// CheckParmsForFunctionDef - Check that the parameters of the given
++ /// function are appropriate for the definition of a function. This
++ /// takes care of any checks that cannot be performed on the
++ /// declaration itself, e.g., that the types of each of the function
++ /// parameters are complete.
++ bool Sema::CheckParmsForFunctionDef(ArrayRef<ParmVarDecl *> Parameters,
++                                     bool CheckParameterNames) {
++   bool HasInvalidParm = false;
++   for (ParmVarDecl *Param : Parameters) {
++     // C99 6.7.5.3p4: the parameters in a parameter type list in a
++     // function declarator that is part of a function definition of
++     // that function shall not have incomplete type.
++     //
++     // This is also C++ [dcl.fct]p6.
++     if (!Param->isInvalidDecl() &&
++         RequireCompleteType(Param->getLocation(), Param->getType(),
++                             diag::err_typecheck_decl_incomplete_type)) {
++       Param->setInvalidDecl();
++       HasInvalidParm = true;
++     }
++ 
++     // C99 6.9.1p5: If the declarator includes a parameter type list, the
++     // declaration of each parameter shall include an identifier.
++     if (CheckParameterNames && Param->getIdentifier() == nullptr &&
++         !Param->isImplicit() && !getLangOpts().CPlusPlus) {
++       // Diagnose this as an extension in C17 and earlier.
++       if (!getLangOpts().C2x)
++         Diag(Param->getLocation(), diag::ext_parameter_name_omitted_c2x);
++     }
++ 
++     // C99 6.7.5.3p12:
++     //   If the function declarator is not part of a definition of that
++     //   function, parameters may have incomplete type and may use the [*]
++     //   notation in their sequences of declarator specifiers to specify
++     //   variable length array types.
++     QualType PType = Param->getOriginalType();
++     // FIXME: This diagnostic should point the '[*]' if source-location
++     // information is added for it.
++     diagnoseArrayStarInParamType(*this, PType, Param->getLocation());
++ 
++     // If the parameter is a c++ class type and it has to be destructed in the
++     // callee function, declare the destructor so that it can be called by the
++     // callee function. Do not perform any direct access check on the dtor here.
++     if (!Param->isInvalidDecl()) {
++       if (CXXRecordDecl *ClassDecl = Param->getType()->getAsCXXRecordDecl()) {
++         if (!ClassDecl->isInvalidDecl() &&
++             !ClassDecl->hasIrrelevantDestructor() &&
++             !ClassDecl->isDependentContext() &&
++             ClassDecl->isParamDestroyedInCallee()) {
++           CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl);
++           MarkFunctionReferenced(Param->getLocation(), Destructor);
++           DiagnoseUseOfDecl(Destructor, Param->getLocation());
++         }
++       }
++     }
++ 
++     // Parameters with the pass_object_size attribute only need to be marked
++     // constant at function definitions. Because we lack information about
++     // whether we're on a declaration or definition when we're instantiating the
++     // attribute, we need to check for constness here.
++     if (const auto *Attr = Param->getAttr<PassObjectSizeAttr>())
++       if (!Param->getType().isConstQualified())
++         Diag(Param->getLocation(), diag::err_attribute_pointers_only)
++             << Attr->getSpelling() << 1;
++ 
++     // Check for parameter names shadowing fields from the class.
++     if (LangOpts.CPlusPlus && !Param->isInvalidDecl()) {
++       // The owning context for the parameter should be the function, but we
++       // want to see if this function's declaration context is a record.
++       DeclContext *DC = Param->getDeclContext();
++       if (DC && DC->isFunctionOrMethod()) {
++         if (auto *RD = dyn_cast<CXXRecordDecl>(DC->getParent()))
++           CheckShadowInheritedFields(Param->getLocation(), Param->getDeclName(),
++                                      RD, /*DeclIsField*/ false);
++       }
++     }
++   }
++ 
++   return HasInvalidParm;
++ }
++ 
++ Optional<std::pair<CharUnits, CharUnits>>
++ static getBaseAlignmentAndOffsetFromPtr(const Expr *E, ASTContext &Ctx);
++ 
++ /// Compute the alignment and offset of the base class object given the
++ /// derived-to-base cast expression and the alignment and offset of the derived
++ /// class object.
++ static std::pair<CharUnits, CharUnits>
++ getDerivedToBaseAlignmentAndOffset(const CastExpr *CE, QualType DerivedType,
++                                    CharUnits BaseAlignment, CharUnits Offset,
++                                    ASTContext &Ctx) {
++   for (auto PathI = CE->path_begin(), PathE = CE->path_end(); PathI != PathE;
++        ++PathI) {
++     const CXXBaseSpecifier *Base = *PathI;
++     const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl();
++     if (Base->isVirtual()) {
++       // The complete object may have a lower alignment than the non-virtual
++       // alignment of the base, in which case the base may be misaligned. Choose
++       // the smaller of the non-virtual alignment and BaseAlignment, which is a
++       // conservative lower bound of the complete object alignment.
++       CharUnits NonVirtualAlignment =
++           Ctx.getASTRecordLayout(BaseDecl).getNonVirtualAlignment();
++       BaseAlignment = std::min(BaseAlignment, NonVirtualAlignment);
++       Offset = CharUnits::Zero();
++     } else {
++       const ASTRecordLayout &RL =
++           Ctx.getASTRecordLayout(DerivedType->getAsCXXRecordDecl());
++       Offset += RL.getBaseClassOffset(BaseDecl);
++     }
++     DerivedType = Base->getType();
++   }
++ 
++   return std::make_pair(BaseAlignment, Offset);
++ }
++ 
++ /// Compute the alignment and offset of a binary additive operator.
++ static Optional<std::pair<CharUnits, CharUnits>>
++ getAlignmentAndOffsetFromBinAddOrSub(const Expr *PtrE, const Expr *IntE,
++                                      bool IsSub, ASTContext &Ctx) {
++   QualType PointeeType = PtrE->getType()->getPointeeType();
++ 
++   if (!PointeeType->isConstantSizeType())
++     return llvm::None;
++ 
++   auto P = getBaseAlignmentAndOffsetFromPtr(PtrE, Ctx);
++ 
++   if (!P)
++     return llvm::None;
++ 
++   CharUnits EltSize = Ctx.getTypeSizeInChars(PointeeType);
++   if (Optional<llvm::APSInt> IdxRes = IntE->getIntegerConstantExpr(Ctx)) {
++     CharUnits Offset = EltSize * IdxRes->getExtValue();
++     if (IsSub)
++       Offset = -Offset;
++     return std::make_pair(P->first, P->second + Offset);
++   }
++ 
++   // If the integer expression isn't a constant expression, compute the lower
++   // bound of the alignment using the alignment and offset of the pointer
++   // expression and the element size.
++   return std::make_pair(
++       P->first.alignmentAtOffset(P->second).alignmentAtOffset(EltSize),
++       CharUnits::Zero());
++ }
++ 
++ /// This helper function takes an lvalue expression and returns the alignment of
++ /// a VarDecl and a constant offset from the VarDecl.
++ Optional<std::pair<CharUnits, CharUnits>>
++ static getBaseAlignmentAndOffsetFromLValue(const Expr *E, ASTContext &Ctx) {
++   E = E->IgnoreParens();
++   switch (E->getStmtClass()) {
++   default:
++     break;
++   case Stmt::CStyleCastExprClass:
++   case Stmt::CXXStaticCastExprClass:
++   case Stmt::ImplicitCastExprClass: {
++     auto *CE = cast<CastExpr>(E);
++     const Expr *From = CE->getSubExpr();
++     switch (CE->getCastKind()) {
++     default:
++       break;
++     case CK_NoOp:
++       return getBaseAlignmentAndOffsetFromLValue(From, Ctx);
++     case CK_UncheckedDerivedToBase:
++     case CK_DerivedToBase: {
++       auto P = getBaseAlignmentAndOffsetFromLValue(From, Ctx);
++       if (!P)
++         break;
++       return getDerivedToBaseAlignmentAndOffset(CE, From->getType(), P->first,
++                                                 P->second, Ctx);
++     }
++     }
++     break;
++   }
++   case Stmt::ArraySubscriptExprClass: {
++     auto *ASE = cast<ArraySubscriptExpr>(E);
++     return getAlignmentAndOffsetFromBinAddOrSub(ASE->getBase(), ASE->getIdx(),
++                                                 false, Ctx);
++   }
++   case Stmt::DeclRefExprClass: {
++     if (auto *VD = dyn_cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl())) {
++       // FIXME: If VD is captured by copy or is an escaping __block variable,
++       // use the alignment of VD's type.
++       if (!VD->getType()->isReferenceType())
++         return std::make_pair(Ctx.getDeclAlign(VD), CharUnits::Zero());
++       if (VD->hasInit())
++         return getBaseAlignmentAndOffsetFromLValue(VD->getInit(), Ctx);
++     }
++     break;
++   }
++   case Stmt::MemberExprClass: {
++     auto *ME = cast<MemberExpr>(E);
++     auto *FD = dyn_cast<FieldDecl>(ME->getMemberDecl());
++     if (!FD || FD->getType()->isReferenceType() ||
++         FD->getParent()->isInvalidDecl())
++       break;
++     Optional<std::pair<CharUnits, CharUnits>> P;
++     if (ME->isArrow())
++       P = getBaseAlignmentAndOffsetFromPtr(ME->getBase(), Ctx);
++     else
++       P = getBaseAlignmentAndOffsetFromLValue(ME->getBase(), Ctx);
++     if (!P)
++       break;
++     const ASTRecordLayout &Layout = Ctx.getASTRecordLayout(FD->getParent());
++     uint64_t Offset = Layout.getFieldOffset(FD->getFieldIndex());
++     return std::make_pair(P->first,
++                           P->second + CharUnits::fromQuantity(Offset));
++   }
++   case Stmt::UnaryOperatorClass: {
++     auto *UO = cast<UnaryOperator>(E);
++     switch (UO->getOpcode()) {
++     default:
++       break;
++     case UO_Deref:
++       return getBaseAlignmentAndOffsetFromPtr(UO->getSubExpr(), Ctx);
++     }
++     break;
++   }
++   case Stmt::BinaryOperatorClass: {
++     auto *BO = cast<BinaryOperator>(E);
++     auto Opcode = BO->getOpcode();
++     switch (Opcode) {
++     default:
++       break;
++     case BO_Comma:
++       return getBaseAlignmentAndOffsetFromLValue(BO->getRHS(), Ctx);
++     }
++     break;
++   }
++   }
++   return llvm::None;
++ }
++ 
++ /// This helper function takes a pointer expression and returns the alignment of
++ /// a VarDecl and a constant offset from the VarDecl.
++ Optional<std::pair<CharUnits, CharUnits>>
++ static getBaseAlignmentAndOffsetFromPtr(const Expr *E, ASTContext &Ctx) {
++   E = E->IgnoreParens();
++   switch (E->getStmtClass()) {
++   default:
++     break;
++   case Stmt::CStyleCastExprClass:
++   case Stmt::CXXStaticCastExprClass:
++   case Stmt::ImplicitCastExprClass: {
++     auto *CE = cast<CastExpr>(E);
++     const Expr *From = CE->getSubExpr();
++     switch (CE->getCastKind()) {
++     default:
++       break;
++     case CK_NoOp:
++       return getBaseAlignmentAndOffsetFromPtr(From, Ctx);
++     case CK_ArrayToPointerDecay:
++       return getBaseAlignmentAndOffsetFromLValue(From, Ctx);
++     case CK_UncheckedDerivedToBase:
++     case CK_DerivedToBase: {
++       auto P = getBaseAlignmentAndOffsetFromPtr(From, Ctx);
++       if (!P)
++         break;
++       return getDerivedToBaseAlignmentAndOffset(
++           CE, From->getType()->getPointeeType(), P->first, P->second, Ctx);
++     }
++     }
++     break;
++   }
++   case Stmt::CXXThisExprClass: {
++     auto *RD = E->getType()->getPointeeType()->getAsCXXRecordDecl();
++     CharUnits Alignment = Ctx.getASTRecordLayout(RD).getNonVirtualAlignment();
++     return std::make_pair(Alignment, CharUnits::Zero());
++   }
++   case Stmt::UnaryOperatorClass: {
++     auto *UO = cast<UnaryOperator>(E);
++     if (UO->getOpcode() == UO_AddrOf)
++       return getBaseAlignmentAndOffsetFromLValue(UO->getSubExpr(), Ctx);
++     break;
++   }
++   case Stmt::BinaryOperatorClass: {
++     auto *BO = cast<BinaryOperator>(E);
++     auto Opcode = BO->getOpcode();
++     switch (Opcode) {
++     default:
++       break;
++     case BO_Add:
++     case BO_Sub: {
++       const Expr *LHS = BO->getLHS(), *RHS = BO->getRHS();
++       if (Opcode == BO_Add && !RHS->getType()->isIntegralOrEnumerationType())
++         std::swap(LHS, RHS);
++       return getAlignmentAndOffsetFromBinAddOrSub(LHS, RHS, Opcode == BO_Sub,
++                                                   Ctx);
++     }
++     case BO_Comma:
++       return getBaseAlignmentAndOffsetFromPtr(BO->getRHS(), Ctx);
++     }
++     break;
++   }
++   }
++   return llvm::None;
++ }
++ 
++ static CharUnits getPresumedAlignmentOfPointer(const Expr *E, Sema &S) {
++   // See if we can compute the alignment of a VarDecl and an offset from it.
++   Optional<std::pair<CharUnits, CharUnits>> P =
++       getBaseAlignmentAndOffsetFromPtr(E, S.Context);
++ 
++   if (P)
++     return P->first.alignmentAtOffset(P->second);
++ 
++   // If that failed, return the type's alignment.
++   return S.Context.getTypeAlignInChars(E->getType()->getPointeeType());
++ }
++ 
++ /// CheckCastAlign - Implements -Wcast-align, which warns when a
++ /// pointer cast increases the alignment requirements.
++ void Sema::CheckCastAlign(Expr *Op, QualType T, SourceRange TRange) {
++   // This is actually a lot of work to potentially be doing on every
++   // cast; don't do it if we're ignoring -Wcast_align (as is the default).
++   if (getDiagnostics().isIgnored(diag::warn_cast_align, TRange.getBegin()))
++     return;
++ 
++   // Ignore dependent types.
++   if (T->isDependentType() || Op->getType()->isDependentType())
++     return;
++ 
++   // Require that the destination be a pointer type.
++   const PointerType *DestPtr = T->getAs<PointerType>();
++   if (!DestPtr) return;
++ 
++   // If the destination has alignment 1, we're done.
++   QualType DestPointee = DestPtr->getPointeeType();
++   if (DestPointee->isIncompleteType()) return;
++   CharUnits DestAlign = Context.getTypeAlignInChars(DestPointee);
++   if (DestAlign.isOne()) return;
++ 
++   // Require that the source be a pointer type.
++   const PointerType *SrcPtr = Op->getType()->getAs<PointerType>();
++   if (!SrcPtr) return;
++   QualType SrcPointee = SrcPtr->getPointeeType();
++ 
++   // Explicitly allow casts from cv void*.  We already implicitly
++   // allowed casts to cv void*, since they have alignment 1.
++   // Also allow casts involving incomplete types, which implicitly
++   // includes 'void'.
++   if (SrcPointee->isIncompleteType()) return;
++ 
++   CharUnits SrcAlign = getPresumedAlignmentOfPointer(Op, *this);
++ 
++   if (SrcAlign >= DestAlign) return;
++ 
++   Diag(TRange.getBegin(), diag::warn_cast_align)
++     << Op->getType() << T
++     << static_cast<unsigned>(SrcAlign.getQuantity())
++     << static_cast<unsigned>(DestAlign.getQuantity())
++     << TRange << Op->getSourceRange();
++ }
++ 
++ /// Check whether this array fits the idiom of a size-one tail padded
++ /// array member of a struct.
++ ///
++ /// We avoid emitting out-of-bounds access warnings for such arrays as they are
++ /// commonly used to emulate flexible arrays in C89 code.
++ static bool IsTailPaddedMemberArray(Sema &S, const llvm::APInt &Size,
++                                     const NamedDecl *ND) {
++   if (Size != 1 || !ND) return false;
++ 
++   const FieldDecl *FD = dyn_cast<FieldDecl>(ND);
++   if (!FD) return false;
++ 
++   // Don't consider sizes resulting from macro expansions or template argument
++   // substitution to form C89 tail-padded arrays.
++ 
++   TypeSourceInfo *TInfo = FD->getTypeSourceInfo();
++   while (TInfo) {
++     TypeLoc TL = TInfo->getTypeLoc();
++     // Look through typedefs.
++     if (TypedefTypeLoc TTL = TL.getAs<TypedefTypeLoc>()) {
++       const TypedefNameDecl *TDL = TTL.getTypedefNameDecl();
++       TInfo = TDL->getTypeSourceInfo();
++       continue;
++     }
++     if (ConstantArrayTypeLoc CTL = TL.getAs<ConstantArrayTypeLoc>()) {
++       const Expr *SizeExpr = dyn_cast<IntegerLiteral>(CTL.getSizeExpr());
++       if (!SizeExpr || SizeExpr->getExprLoc().isMacroID())
++         return false;
++     }
++     break;
++   }
++ 
++   const RecordDecl *RD = dyn_cast<RecordDecl>(FD->getDeclContext());
++   if (!RD) return false;
++   if (RD->isUnion()) return false;
++   if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
++     if (!CRD->isStandardLayout()) return false;
++   }
++ 
++   // See if this is the last field decl in the record.
++   const Decl *D = FD;
++   while ((D = D->getNextDeclInContext()))
++     if (isa<FieldDecl>(D))
++       return false;
++   return true;
++ }
++ 
++ void Sema::CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr,
++                             const ArraySubscriptExpr *ASE,
++                             bool AllowOnePastEnd, bool IndexNegated) {
++   // Already diagnosed by the constant evaluator.
++   if (isConstantEvaluated())
++     return;
++ 
++   IndexExpr = IndexExpr->IgnoreParenImpCasts();
++   if (IndexExpr->isValueDependent())
++     return;
++ 
++   const Type *EffectiveType =
++       BaseExpr->getType()->getPointeeOrArrayElementType();
++   BaseExpr = BaseExpr->IgnoreParenCasts();
++   const ConstantArrayType *ArrayTy =
++       Context.getAsConstantArrayType(BaseExpr->getType());
++ 
++   const Type *BaseType =
++       ArrayTy == nullptr ? nullptr : ArrayTy->getElementType().getTypePtr();
++   bool IsUnboundedArray = (BaseType == nullptr);
++   if (EffectiveType->isDependentType() ||
++       (!IsUnboundedArray && BaseType->isDependentType()))
++     return;
++ 
++   Expr::EvalResult Result;
++   if (!IndexExpr->EvaluateAsInt(Result, Context, Expr::SE_AllowSideEffects))
++     return;
++ 
++   llvm::APSInt index = Result.Val.getInt();
++   if (IndexNegated) {
++     index.setIsUnsigned(false);
++     index = -index;
++   }
++ 
++   const NamedDecl *ND = nullptr;
++   if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
++     ND = DRE->getDecl();
++   if (const MemberExpr *ME = dyn_cast<MemberExpr>(BaseExpr))
++     ND = ME->getMemberDecl();
++ 
++   if (IsUnboundedArray) {
++     if (index.isUnsigned() || !index.isNegative()) {
++       const auto &ASTC = getASTContext();
++       unsigned AddrBits =
++           ASTC.getTargetInfo().getPointerWidth(ASTC.getTargetAddressSpace(
++               EffectiveType->getCanonicalTypeInternal()));
++       if (index.getBitWidth() < AddrBits)
++         index = index.zext(AddrBits);
++       Optional<CharUnits> ElemCharUnits =
++           ASTC.getTypeSizeInCharsIfKnown(EffectiveType);
++       // PR50741 - If EffectiveType has unknown size (e.g., if it's a void
++       // pointer) bounds-checking isn't meaningful.
++       if (!ElemCharUnits)
++         return;
++       llvm::APInt ElemBytes(index.getBitWidth(), ElemCharUnits->getQuantity());
++       // If index has more active bits than address space, we already know
++       // we have a bounds violation to warn about.  Otherwise, compute
++       // address of (index + 1)th element, and warn about bounds violation
++       // only if that address exceeds address space.
++       if (index.getActiveBits() <= AddrBits) {
++         bool Overflow;
++         llvm::APInt Product(index);
++         Product += 1;
++         Product = Product.umul_ov(ElemBytes, Overflow);
++         if (!Overflow && Product.getActiveBits() <= AddrBits)
++           return;
++       }
++ 
++       // Need to compute max possible elements in address space, since that
++       // is included in diag message.
++       llvm::APInt MaxElems = llvm::APInt::getMaxValue(AddrBits);
++       MaxElems = MaxElems.zext(std::max(AddrBits + 1, ElemBytes.getBitWidth()));
++       MaxElems += 1;
++       ElemBytes = ElemBytes.zextOrTrunc(MaxElems.getBitWidth());
++       MaxElems = MaxElems.udiv(ElemBytes);
++ 
++       unsigned DiagID =
++           ASE ? diag::warn_array_index_exceeds_max_addressable_bounds
++               : diag::warn_ptr_arith_exceeds_max_addressable_bounds;
++ 
++       // Diag message shows element size in bits and in "bytes" (platform-
++       // dependent CharUnits)
++       DiagRuntimeBehavior(BaseExpr->getBeginLoc(), BaseExpr,
++                           PDiag(DiagID)
++                               << toString(index, 10, true) << AddrBits
++                               << (unsigned)ASTC.toBits(*ElemCharUnits)
++                               << toString(ElemBytes, 10, false)
++                               << toString(MaxElems, 10, false)
++                               << (unsigned)MaxElems.getLimitedValue(~0U)
++                               << IndexExpr->getSourceRange());
++ 
++       if (!ND) {
++         // Try harder to find a NamedDecl to point at in the note.
++         while (const auto *ASE = dyn_cast<ArraySubscriptExpr>(BaseExpr))
++           BaseExpr = ASE->getBase()->IgnoreParenCasts();
++         if (const auto *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
++           ND = DRE->getDecl();
++         if (const auto *ME = dyn_cast<MemberExpr>(BaseExpr))
++           ND = ME->getMemberDecl();
++       }
++ 
++       if (ND)
++         DiagRuntimeBehavior(ND->getBeginLoc(), BaseExpr,
++                             PDiag(diag::note_array_declared_here) << ND);
++     }
++     return;
++   }
++ 
++   if (index.isUnsigned() || !index.isNegative()) {
++     // It is possible that the type of the base expression after
++     // IgnoreParenCasts is incomplete, even though the type of the base
++     // expression before IgnoreParenCasts is complete (see PR39746 for an
++     // example). In this case we have no information about whether the array
++     // access exceeds the array bounds. However we can still diagnose an array
++     // access which precedes the array bounds.
++     if (BaseType->isIncompleteType())
++       return;
++ 
++     llvm::APInt size = ArrayTy->getSize();
++     if (!size.isStrictlyPositive())
++       return;
++ 
++     if (BaseType != EffectiveType) {
++       // Make sure we're comparing apples to apples when comparing index to size
++       uint64_t ptrarith_typesize = Context.getTypeSize(EffectiveType);
++       uint64_t array_typesize = Context.getTypeSize(BaseType);
++       // Handle ptrarith_typesize being zero, such as when casting to void*
++       if (!ptrarith_typesize) ptrarith_typesize = 1;
++       if (ptrarith_typesize != array_typesize) {
++         // There's a cast to a different size type involved
++         uint64_t ratio = array_typesize / ptrarith_typesize;
++         // TODO: Be smarter about handling cases where array_typesize is not a
++         // multiple of ptrarith_typesize
++         if (ptrarith_typesize * ratio == array_typesize)
++           size *= llvm::APInt(size.getBitWidth(), ratio);
++       }
++     }
++ 
++     if (size.getBitWidth() > index.getBitWidth())
++       index = index.zext(size.getBitWidth());
++     else if (size.getBitWidth() < index.getBitWidth())
++       size = size.zext(index.getBitWidth());
++ 
++     // For array subscripting the index must be less than size, but for pointer
++     // arithmetic also allow the index (offset) to be equal to size since
++     // computing the next address after the end of the array is legal and
++     // commonly done e.g. in C++ iterators and range-based for loops.
++     if (AllowOnePastEnd ? index.ule(size) : index.ult(size))
++       return;
++ 
++     // Also don't warn for arrays of size 1 which are members of some
++     // structure. These are often used to approximate flexible arrays in C89
++     // code.
++     if (IsTailPaddedMemberArray(*this, size, ND))
++       return;
++ 
++     // Suppress the warning if the subscript expression (as identified by the
++     // ']' location) and the index expression are both from macro expansions
++     // within a system header.
++     if (ASE) {
++       SourceLocation RBracketLoc = SourceMgr.getSpellingLoc(
++           ASE->getRBracketLoc());
++       if (SourceMgr.isInSystemHeader(RBracketLoc)) {
++         SourceLocation IndexLoc =
++             SourceMgr.getSpellingLoc(IndexExpr->getBeginLoc());
++         if (SourceMgr.isWrittenInSameFile(RBracketLoc, IndexLoc))
++           return;
++       }
++     }
++ 
++     unsigned DiagID = ASE ? diag::warn_array_index_exceeds_bounds
++                           : diag::warn_ptr_arith_exceeds_bounds;
++ 
++     DiagRuntimeBehavior(BaseExpr->getBeginLoc(), BaseExpr,
++                         PDiag(DiagID) << toString(index, 10, true)
++                                       << toString(size, 10, true)
++                                       << (unsigned)size.getLimitedValue(~0U)
++                                       << IndexExpr->getSourceRange());
++   } else {
++     unsigned DiagID = diag::warn_array_index_precedes_bounds;
++     if (!ASE) {
++       DiagID = diag::warn_ptr_arith_precedes_bounds;
++       if (index.isNegative()) index = -index;
++     }
++ 
++     DiagRuntimeBehavior(BaseExpr->getBeginLoc(), BaseExpr,
++                         PDiag(DiagID) << toString(index, 10, true)
++                                       << IndexExpr->getSourceRange());
++   }
++ 
++   if (!ND) {
++     // Try harder to find a NamedDecl to point at in the note.
++     while (const auto *ASE = dyn_cast<ArraySubscriptExpr>(BaseExpr))
++       BaseExpr = ASE->getBase()->IgnoreParenCasts();
++     if (const auto *DRE = dyn_cast<DeclRefExpr>(BaseExpr))
++       ND = DRE->getDecl();
++     if (const auto *ME = dyn_cast<MemberExpr>(BaseExpr))
++       ND = ME->getMemberDecl();
++   }
++ 
++   if (ND)
++     DiagRuntimeBehavior(ND->getBeginLoc(), BaseExpr,
++                         PDiag(diag::note_array_declared_here) << ND);
++ }
++ 
++ void Sema::CheckArrayAccess(const Expr *expr) {
++   int AllowOnePastEnd = 0;
++   while (expr) {
++     expr = expr->IgnoreParenImpCasts();
++     switch (expr->getStmtClass()) {
++       case Stmt::ArraySubscriptExprClass: {
++         const ArraySubscriptExpr *ASE = cast<ArraySubscriptExpr>(expr);
++         CheckArrayAccess(ASE->getBase(), ASE->getIdx(), ASE,
++                          AllowOnePastEnd > 0);
++         expr = ASE->getBase();
++         break;
++       }
++       case Stmt::MemberExprClass: {
++         expr = cast<MemberExpr>(expr)->getBase();
++         break;
++       }
++       case Stmt::OMPArraySectionExprClass: {
++         const OMPArraySectionExpr *ASE = cast<OMPArraySectionExpr>(expr);
++         if (ASE->getLowerBound())
++           CheckArrayAccess(ASE->getBase(), ASE->getLowerBound(),
++                            /*ASE=*/nullptr, AllowOnePastEnd > 0);
++         return;
++       }
++       case Stmt::UnaryOperatorClass: {
++         // Only unwrap the * and & unary operators
++         const UnaryOperator *UO = cast<UnaryOperator>(expr);
++         expr = UO->getSubExpr();
++         switch (UO->getOpcode()) {
++           case UO_AddrOf:
++             AllowOnePastEnd++;
++             break;
++           case UO_Deref:
++             AllowOnePastEnd--;
++             break;
++           default:
++             return;
++         }
++         break;
++       }
++       case Stmt::ConditionalOperatorClass: {
++         const ConditionalOperator *cond = cast<ConditionalOperator>(expr);
++         if (const Expr *lhs = cond->getLHS())
++           CheckArrayAccess(lhs);
++         if (const Expr *rhs = cond->getRHS())
++           CheckArrayAccess(rhs);
++         return;
++       }
++       case Stmt::CXXOperatorCallExprClass: {
++         const auto *OCE = cast<CXXOperatorCallExpr>(expr);
++         for (const auto *Arg : OCE->arguments())
++           CheckArrayAccess(Arg);
++         return;
++       }
++       default:
++         return;
++     }
++   }
++ }
++ 
++ //===--- CHECK: Objective-C retain cycles ----------------------------------//
++ 
++ namespace {
++ 
++ struct RetainCycleOwner {
++   VarDecl *Variable = nullptr;
++   SourceRange Range;
++   SourceLocation Loc;
++   bool Indirect = false;
++ 
++   RetainCycleOwner() = default;
++ 
++   void setLocsFrom(Expr *e) {
++     Loc = e->getExprLoc();
++     Range = e->getSourceRange();
++   }
++ };
++ 
++ } // namespace
++ 
++ /// Consider whether capturing the given variable can possibly lead to
++ /// a retain cycle.
++ static bool considerVariable(VarDecl *var, Expr *ref, RetainCycleOwner &owner) {
++   // In ARC, it's captured strongly iff the variable has __strong
++   // lifetime.  In MRR, it's captured strongly if the variable is
++   // __block and has an appropriate type.
++   if (var->getType().getObjCLifetime() != Qualifiers::OCL_Strong)
++     return false;
++ 
++   owner.Variable = var;
++   if (ref)
++     owner.setLocsFrom(ref);
++   return true;
++ }
++ 
++ static bool findRetainCycleOwner(Sema &S, Expr *e, RetainCycleOwner &owner) {
++   while (true) {
++     e = e->IgnoreParens();
++     if (CastExpr *cast = dyn_cast<CastExpr>(e)) {
++       switch (cast->getCastKind()) {
++       case CK_BitCast:
++       case CK_LValueBitCast:
++       case CK_LValueToRValue:
++       case CK_ARCReclaimReturnedObject:
++         e = cast->getSubExpr();
++         continue;
++ 
++       default:
++         return false;
++       }
++     }
++ 
++     if (ObjCIvarRefExpr *ref = dyn_cast<ObjCIvarRefExpr>(e)) {
++       ObjCIvarDecl *ivar = ref->getDecl();
++       if (ivar->getType().getObjCLifetime() != Qualifiers::OCL_Strong)
++         return false;
++ 
++       // Try to find a retain cycle in the base.
++       if (!findRetainCycleOwner(S, ref->getBase(), owner))
++         return false;
++ 
++       if (ref->isFreeIvar()) owner.setLocsFrom(ref);
++       owner.Indirect = true;
++       return true;
++     }
++ 
++     if (DeclRefExpr *ref = dyn_cast<DeclRefExpr>(e)) {
++       VarDecl *var = dyn_cast<VarDecl>(ref->getDecl());
++       if (!var) return false;
++       return considerVariable(var, ref, owner);
++     }
++ 
++     if (MemberExpr *member = dyn_cast<MemberExpr>(e)) {
++       if (member->isArrow()) return false;
++ 
++       // Don't count this as an indirect ownership.
++       e = member->getBase();
++       continue;
++     }
++ 
++     if (PseudoObjectExpr *pseudo = dyn_cast<PseudoObjectExpr>(e)) {
++       // Only pay attention to pseudo-objects on property references.
++       ObjCPropertyRefExpr *pre
++         = dyn_cast<ObjCPropertyRefExpr>(pseudo->getSyntacticForm()
++                                               ->IgnoreParens());
++       if (!pre) return false;
++       if (pre->isImplicitProperty()) return false;
++       ObjCPropertyDecl *property = pre->getExplicitProperty();
++       if (!property->isRetaining() &&
++           !(property->getPropertyIvarDecl() &&
++             property->getPropertyIvarDecl()->getType()
++               .getObjCLifetime() == Qualifiers::OCL_Strong))
++           return false;
++ 
++       owner.Indirect = true;
++       if (pre->isSuperReceiver()) {
++         owner.Variable = S.getCurMethodDecl()->getSelfDecl();
++         if (!owner.Variable)
++           return false;
++         owner.Loc = pre->getLocation();
++         owner.Range = pre->getSourceRange();
++         return true;
++       }
++       e = const_cast<Expr*>(cast<OpaqueValueExpr>(pre->getBase())
++                               ->getSourceExpr());
++       continue;
++     }
++ 
++     // Array ivars?
++ 
++     return false;
++   }
++ }
++ 
++ namespace {
++ 
++   struct FindCaptureVisitor : EvaluatedExprVisitor<FindCaptureVisitor> {
++     ASTContext &Context;
++     VarDecl *Variable;
++     Expr *Capturer = nullptr;
++     bool VarWillBeReased = false;
++ 
++     FindCaptureVisitor(ASTContext &Context, VarDecl *variable)
++         : EvaluatedExprVisitor<FindCaptureVisitor>(Context),
++           Context(Context), Variable(variable) {}
++ 
++     void VisitDeclRefExpr(DeclRefExpr *ref) {
++       if (ref->getDecl() == Variable && !Capturer)
++         Capturer = ref;
++     }
++ 
++     void VisitObjCIvarRefExpr(ObjCIvarRefExpr *ref) {
++       if (Capturer) return;
++       Visit(ref->getBase());
++       if (Capturer && ref->isFreeIvar())
++         Capturer = ref;
++     }
++ 
++     void VisitBlockExpr(BlockExpr *block) {
++       // Look inside nested blocks
++       if (block->getBlockDecl()->capturesVariable(Variable))
++         Visit(block->getBlockDecl()->getBody());
++     }
++ 
++     void VisitOpaqueValueExpr(OpaqueValueExpr *OVE) {
++       if (Capturer) return;
++       if (OVE->getSourceExpr())
++         Visit(OVE->getSourceExpr());
++     }
++ 
++     void VisitBinaryOperator(BinaryOperator *BinOp) {
++       if (!Variable || VarWillBeReased || BinOp->getOpcode() != BO_Assign)
++         return;
++       Expr *LHS = BinOp->getLHS();
++       if (const DeclRefExpr *DRE = dyn_cast_or_null<DeclRefExpr>(LHS)) {
++         if (DRE->getDecl() != Variable)
++           return;
++         if (Expr *RHS = BinOp->getRHS()) {
++           RHS = RHS->IgnoreParenCasts();
++           Optional<llvm::APSInt> Value;
++           VarWillBeReased =
++               (RHS && (Value = RHS->getIntegerConstantExpr(Context)) &&
++                *Value == 0);
++         }
++       }
++     }
++   };
++ 
++ } // namespace
++ 
++ /// Check whether the given argument is a block which captures a
++ /// variable.
++ static Expr *findCapturingExpr(Sema &S, Expr *e, RetainCycleOwner &owner) {
++   assert(owner.Variable && owner.Loc.isValid());
++ 
++   e = e->IgnoreParenCasts();
++ 
++   // Look through [^{...} copy] and Block_copy(^{...}).
++   if (ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(e)) {
++     Selector Cmd = ME->getSelector();
++     if (Cmd.isUnarySelector() && Cmd.getNameForSlot(0) == "copy") {
++       e = ME->getInstanceReceiver();
++       if (!e)
++         return nullptr;
++       e = e->IgnoreParenCasts();
++     }
++   } else if (CallExpr *CE = dyn_cast<CallExpr>(e)) {
++     if (CE->getNumArgs() == 1) {
++       FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(CE->getCalleeDecl());
++       if (Fn) {
++         const IdentifierInfo *FnI = Fn->getIdentifier();
++         if (FnI && FnI->isStr("_Block_copy")) {
++           e = CE->getArg(0)->IgnoreParenCasts();
++         }
++       }
++     }
++   }
++ 
++   BlockExpr *block = dyn_cast<BlockExpr>(e);
++   if (!block || !block->getBlockDecl()->capturesVariable(owner.Variable))
++     return nullptr;
++ 
++   FindCaptureVisitor visitor(S.Context, owner.Variable);
++   visitor.Visit(block->getBlockDecl()->getBody());
++   return visitor.VarWillBeReased ? nullptr : visitor.Capturer;
++ }
++ 
++ static void diagnoseRetainCycle(Sema &S, Expr *capturer,
++                                 RetainCycleOwner &owner) {
++   assert(capturer);
++   assert(owner.Variable && owner.Loc.isValid());
++ 
++   S.Diag(capturer->getExprLoc(), diag::warn_arc_retain_cycle)
++     << owner.Variable << capturer->getSourceRange();
++   S.Diag(owner.Loc, diag::note_arc_retain_cycle_owner)
++     << owner.Indirect << owner.Range;
++ }
++ 
++ /// Check for a keyword selector that starts with the word 'add' or
++ /// 'set'.
++ static bool isSetterLikeSelector(Selector sel) {
++   if (sel.isUnarySelector()) return false;
++ 
++   StringRef str = sel.getNameForSlot(0);
++   while (!str.empty() && str.front() == '_') str = str.substr(1);
++   if (str.startswith("set"))
++     str = str.substr(3);
++   else if (str.startswith("add")) {
++     // Specially allow 'addOperationWithBlock:'.
++     if (sel.getNumArgs() == 1 && str.startswith("addOperationWithBlock"))
++       return false;
++     str = str.substr(3);
++   }
++   else
++     return false;
++ 
++   if (str.empty()) return true;
++   return !isLowercase(str.front());
++ }
++ 
++ static Optional<int> GetNSMutableArrayArgumentIndex(Sema &S,
++                                                     ObjCMessageExpr *Message) {
++   bool IsMutableArray = S.NSAPIObj->isSubclassOfNSClass(
++                                                 Message->getReceiverInterface(),
++                                                 NSAPI::ClassId_NSMutableArray);
++   if (!IsMutableArray) {
++     return None;
++   }
++ 
++   Selector Sel = Message->getSelector();
++ 
++   Optional<NSAPI::NSArrayMethodKind> MKOpt =
++     S.NSAPIObj->getNSArrayMethodKind(Sel);
++   if (!MKOpt) {
++     return None;
++   }
++ 
++   NSAPI::NSArrayMethodKind MK = *MKOpt;
++ 
++   switch (MK) {
++     case NSAPI::NSMutableArr_addObject:
++     case NSAPI::NSMutableArr_insertObjectAtIndex:
++     case NSAPI::NSMutableArr_setObjectAtIndexedSubscript:
++       return 0;
++     case NSAPI::NSMutableArr_replaceObjectAtIndex:
++       return 1;
++ 
++     default:
++       return None;
++   }
++ 
++   return None;
++ }
++ 
++ static
++ Optional<int> GetNSMutableDictionaryArgumentIndex(Sema &S,
++                                                   ObjCMessageExpr *Message) {
++   bool IsMutableDictionary = S.NSAPIObj->isSubclassOfNSClass(
++                                             Message->getReceiverInterface(),
++                                             NSAPI::ClassId_NSMutableDictionary);
++   if (!IsMutableDictionary) {
++     return None;
++   }
++ 
++   Selector Sel = Message->getSelector();
++ 
++   Optional<NSAPI::NSDictionaryMethodKind> MKOpt =
++     S.NSAPIObj->getNSDictionaryMethodKind(Sel);
++   if (!MKOpt) {
++     return None;
++   }
++ 
++   NSAPI::NSDictionaryMethodKind MK = *MKOpt;
++ 
++   switch (MK) {
++     case NSAPI::NSMutableDict_setObjectForKey:
++     case NSAPI::NSMutableDict_setValueForKey:
++     case NSAPI::NSMutableDict_setObjectForKeyedSubscript:
++       return 0;
++ 
++     default:
++       return None;
++   }
++ 
++   return None;
++ }
++ 
++ static Optional<int> GetNSSetArgumentIndex(Sema &S, ObjCMessageExpr *Message) {
++   bool IsMutableSet = S.NSAPIObj->isSubclassOfNSClass(
++                                                 Message->getReceiverInterface(),
++                                                 NSAPI::ClassId_NSMutableSet);
++ 
++   bool IsMutableOrderedSet = S.NSAPIObj->isSubclassOfNSClass(
++                                             Message->getReceiverInterface(),
++                                             NSAPI::ClassId_NSMutableOrderedSet);
++   if (!IsMutableSet && !IsMutableOrderedSet) {
++     return None;
++   }
++ 
++   Selector Sel = Message->getSelector();
++ 
++   Optional<NSAPI::NSSetMethodKind> MKOpt = S.NSAPIObj->getNSSetMethodKind(Sel);
++   if (!MKOpt) {
++     return None;
++   }
++ 
++   NSAPI::NSSetMethodKind MK = *MKOpt;
++ 
++   switch (MK) {
++     case NSAPI::NSMutableSet_addObject:
++     case NSAPI::NSOrderedSet_setObjectAtIndex:
++     case NSAPI::NSOrderedSet_setObjectAtIndexedSubscript:
++     case NSAPI::NSOrderedSet_insertObjectAtIndex:
++       return 0;
++     case NSAPI::NSOrderedSet_replaceObjectAtIndexWithObject:
++       return 1;
++   }
++ 
++   return None;
++ }
++ 
++ void Sema::CheckObjCCircularContainer(ObjCMessageExpr *Message) {
++   if (!Message->isInstanceMessage()) {
++     return;
++   }
++ 
++   Optional<int> ArgOpt;
++ 
++   if (!(ArgOpt = GetNSMutableArrayArgumentIndex(*this, Message)) &&
++       !(ArgOpt = GetNSMutableDictionaryArgumentIndex(*this, Message)) &&
++       !(ArgOpt = GetNSSetArgumentIndex(*this, Message))) {
++     return;
++   }
++ 
++   int ArgIndex = *ArgOpt;
++ 
++   Expr *Arg = Message->getArg(ArgIndex)->IgnoreImpCasts();
++   if (OpaqueValueExpr *OE = dyn_cast<OpaqueValueExpr>(Arg)) {
++     Arg = OE->getSourceExpr()->IgnoreImpCasts();
++   }
++ 
++   if (Message->getReceiverKind() == ObjCMessageExpr::SuperInstance) {
++     if (DeclRefExpr *ArgRE = dyn_cast<DeclRefExpr>(Arg)) {
++       if (ArgRE->isObjCSelfExpr()) {
++         Diag(Message->getSourceRange().getBegin(),
++              diag::warn_objc_circular_container)
++           << ArgRE->getDecl() << StringRef("'super'");
++       }
++     }
++   } else {
++     Expr *Receiver = Message->getInstanceReceiver()->IgnoreImpCasts();
++ 
++     if (OpaqueValueExpr *OE = dyn_cast<OpaqueValueExpr>(Receiver)) {
++       Receiver = OE->getSourceExpr()->IgnoreImpCasts();
++     }
++ 
++     if (DeclRefExpr *ReceiverRE = dyn_cast<DeclRefExpr>(Receiver)) {
++       if (DeclRefExpr *ArgRE = dyn_cast<DeclRefExpr>(Arg)) {
++         if (ReceiverRE->getDecl() == ArgRE->getDecl()) {
++           ValueDecl *Decl = ReceiverRE->getDecl();
++           Diag(Message->getSourceRange().getBegin(),
++                diag::warn_objc_circular_container)
++             << Decl << Decl;
++           if (!ArgRE->isObjCSelfExpr()) {
++             Diag(Decl->getLocation(),
++                  diag::note_objc_circular_container_declared_here)
++               << Decl;
++           }
++         }
++       }
++     } else if (ObjCIvarRefExpr *IvarRE = dyn_cast<ObjCIvarRefExpr>(Receiver)) {
++       if (ObjCIvarRefExpr *IvarArgRE = dyn_cast<ObjCIvarRefExpr>(Arg)) {
++         if (IvarRE->getDecl() == IvarArgRE->getDecl()) {
++           ObjCIvarDecl *Decl = IvarRE->getDecl();
++           Diag(Message->getSourceRange().getBegin(),
++                diag::warn_objc_circular_container)
++             << Decl << Decl;
++           Diag(Decl->getLocation(),
++                diag::note_objc_circular_container_declared_here)
++             << Decl;
++         }
++       }
++     }
++   }
++ }
++ 
++ /// Check a message send to see if it's likely to cause a retain cycle.
++ void Sema::checkRetainCycles(ObjCMessageExpr *msg) {
++   // Only check instance methods whose selector looks like a setter.
++   if (!msg->isInstanceMessage() || !isSetterLikeSelector(msg->getSelector()))
++     return;
++ 
++   // Try to find a variable that the receiver is strongly owned by.
++   RetainCycleOwner owner;
++   if (msg->getReceiverKind() == ObjCMessageExpr::Instance) {
++     if (!findRetainCycleOwner(*this, msg->getInstanceReceiver(), owner))
++       return;
++   } else {
++     assert(msg->getReceiverKind() == ObjCMessageExpr::SuperInstance);
++     owner.Variable = getCurMethodDecl()->getSelfDecl();
++     owner.Loc = msg->getSuperLoc();
++     owner.Range = msg->getSuperLoc();
++   }
++ 
++   // Check whether the receiver is captured by any of the arguments.
++   const ObjCMethodDecl *MD = msg->getMethodDecl();
++   for (unsigned i = 0, e = msg->getNumArgs(); i != e; ++i) {
++     if (Expr *capturer = findCapturingExpr(*this, msg->getArg(i), owner)) {
++       // noescape blocks should not be retained by the method.
++       if (MD && MD->parameters()[i]->hasAttr<NoEscapeAttr>())
++         continue;
++       return diagnoseRetainCycle(*this, capturer, owner);
++     }
++   }
++ }
++ 
++ /// Check a property assign to see if it's likely to cause a retain cycle.
++ void Sema::checkRetainCycles(Expr *receiver, Expr *argument) {
++   RetainCycleOwner owner;
++   if (!findRetainCycleOwner(*this, receiver, owner))
++     return;
++ 
++   if (Expr *capturer = findCapturingExpr(*this, argument, owner))
++     diagnoseRetainCycle(*this, capturer, owner);
++ }
++ 
++ void Sema::checkRetainCycles(VarDecl *Var, Expr *Init) {
++   RetainCycleOwner Owner;
++   if (!considerVariable(Var, /*DeclRefExpr=*/nullptr, Owner))
++     return;
++ 
++   // Because we don't have an expression for the variable, we have to set the
++   // location explicitly here.
++   Owner.Loc = Var->getLocation();
++   Owner.Range = Var->getSourceRange();
++ 
++   if (Expr *Capturer = findCapturingExpr(*this, Init, Owner))
++     diagnoseRetainCycle(*this, Capturer, Owner);
++ }
++ 
++ static bool checkUnsafeAssignLiteral(Sema &S, SourceLocation Loc,
++                                      Expr *RHS, bool isProperty) {
++   // Check if RHS is an Objective-C object literal, which also can get
++   // immediately zapped in a weak reference.  Note that we explicitly
++   // allow ObjCStringLiterals, since those are designed to never really die.
++   RHS = RHS->IgnoreParenImpCasts();
++ 
++   // This enum needs to match with the 'select' in
++   // warn_objc_arc_literal_assign (off-by-1).
++   Sema::ObjCLiteralKind Kind = S.CheckLiteralKind(RHS);
++   if (Kind == Sema::LK_String || Kind == Sema::LK_None)
++     return false;
++ 
++   S.Diag(Loc, diag::warn_arc_literal_assign)
++     << (unsigned) Kind
++     << (isProperty ? 0 : 1)
++     << RHS->getSourceRange();
++ 
++   return true;
++ }
++ 
++ static bool checkUnsafeAssignObject(Sema &S, SourceLocation Loc,
++                                     Qualifiers::ObjCLifetime LT,
++                                     Expr *RHS, bool isProperty) {
++   // Strip off any implicit cast added to get to the one ARC-specific.
++   while (ImplicitCastExpr *cast = dyn_cast<ImplicitCastExpr>(RHS)) {
++     if (cast->getCastKind() == CK_ARCConsumeObject) {
++       S.Diag(Loc, diag::warn_arc_retained_assign)
++         << (LT == Qualifiers::OCL_ExplicitNone)
++         << (isProperty ? 0 : 1)
++         << RHS->getSourceRange();
++       return true;
++     }
++     RHS = cast->getSubExpr();
++   }
++ 
++   if (LT == Qualifiers::OCL_Weak &&
++       checkUnsafeAssignLiteral(S, Loc, RHS, isProperty))
++     return true;
++ 
++   return false;
++ }
++ 
++ bool Sema::checkUnsafeAssigns(SourceLocation Loc,
++                               QualType LHS, Expr *RHS) {
++   Qualifiers::ObjCLifetime LT = LHS.getObjCLifetime();
++ 
++   if (LT != Qualifiers::OCL_Weak && LT != Qualifiers::OCL_ExplicitNone)
++     return false;
++ 
++   if (checkUnsafeAssignObject(*this, Loc, LT, RHS, false))
++     return true;
++ 
++   return false;
++ }
++ 
++ void Sema::checkUnsafeExprAssigns(SourceLocation Loc,
++                               Expr *LHS, Expr *RHS) {
++   QualType LHSType;
++   // PropertyRef on LHS type need be directly obtained from
++   // its declaration as it has a PseudoType.
++   ObjCPropertyRefExpr *PRE
++     = dyn_cast<ObjCPropertyRefExpr>(LHS->IgnoreParens());
++   if (PRE && !PRE->isImplicitProperty()) {
++     const ObjCPropertyDecl *PD = PRE->getExplicitProperty();
++     if (PD)
++       LHSType = PD->getType();
++   }
++ 
++   if (LHSType.isNull())
++     LHSType = LHS->getType();
++ 
++   Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
++ 
++   if (LT == Qualifiers::OCL_Weak) {
++     if (!Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, Loc))
++       getCurFunction()->markSafeWeakUse(LHS);
++   }
++ 
++   if (checkUnsafeAssigns(Loc, LHSType, RHS))
++     return;
++ 
++   // FIXME. Check for other life times.
++   if (LT != Qualifiers::OCL_None)
++     return;
++ 
++   if (PRE) {
++     if (PRE->isImplicitProperty())
++       return;
++     const ObjCPropertyDecl *PD = PRE->getExplicitProperty();
++     if (!PD)
++       return;
++ 
++     unsigned Attributes = PD->getPropertyAttributes();
++     if (Attributes & ObjCPropertyAttribute::kind_assign) {
++       // when 'assign' attribute was not explicitly specified
++       // by user, ignore it and rely on property type itself
++       // for lifetime info.
++       unsigned AsWrittenAttr = PD->getPropertyAttributesAsWritten();
++       if (!(AsWrittenAttr & ObjCPropertyAttribute::kind_assign) &&
++           LHSType->isObjCRetainableType())
++         return;
++ 
++       while (ImplicitCastExpr *cast = dyn_cast<ImplicitCastExpr>(RHS)) {
++         if (cast->getCastKind() == CK_ARCConsumeObject) {
++           Diag(Loc, diag::warn_arc_retained_property_assign)
++           << RHS->getSourceRange();
++           return;
++         }
++         RHS = cast->getSubExpr();
++       }
++     } else if (Attributes & ObjCPropertyAttribute::kind_weak) {
++       if (checkUnsafeAssignObject(*this, Loc, Qualifiers::OCL_Weak, RHS, true))
++         return;
++     }
++   }
++ }
++ 
++ //===--- CHECK: Empty statement body (-Wempty-body) ---------------------===//
++ 
++ static bool ShouldDiagnoseEmptyStmtBody(const SourceManager &SourceMgr,
++                                         SourceLocation StmtLoc,
++                                         const NullStmt *Body) {
++   // Do not warn if the body is a macro that expands to nothing, e.g:
++   //
++   // #define CALL(x)
++   // if (condition)
++   //   CALL(0);
++   if (Body->hasLeadingEmptyMacro())
++     return false;
++ 
++   // Get line numbers of statement and body.
++   bool StmtLineInvalid;
++   unsigned StmtLine = SourceMgr.getPresumedLineNumber(StmtLoc,
++                                                       &StmtLineInvalid);
++   if (StmtLineInvalid)
++     return false;
++ 
++   bool BodyLineInvalid;
++   unsigned BodyLine = SourceMgr.getSpellingLineNumber(Body->getSemiLoc(),
++                                                       &BodyLineInvalid);
++   if (BodyLineInvalid)
++     return false;
++ 
++   // Warn if null statement and body are on the same line.
++   if (StmtLine != BodyLine)
++     return false;
++ 
++   return true;
++ }
++ 
++ void Sema::DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
++                                  const Stmt *Body,
++                                  unsigned DiagID) {
++   // Since this is a syntactic check, don't emit diagnostic for template
++   // instantiations, this just adds noise.
++   if (CurrentInstantiationScope)
++     return;
++ 
++   // The body should be a null statement.
++   const NullStmt *NBody = dyn_cast<NullStmt>(Body);
++   if (!NBody)
++     return;
++ 
++   // Do the usual checks.
++   if (!ShouldDiagnoseEmptyStmtBody(SourceMgr, StmtLoc, NBody))
++     return;
++ 
++   Diag(NBody->getSemiLoc(), DiagID);
++   Diag(NBody->getSemiLoc(), diag::note_empty_body_on_separate_line);
++ }
++ 
++ void Sema::DiagnoseEmptyLoopBody(const Stmt *S,
++                                  const Stmt *PossibleBody) {
++   assert(!CurrentInstantiationScope); // Ensured by caller
++ 
++   SourceLocation StmtLoc;
++   const Stmt *Body;
++   unsigned DiagID;
++   if (const ForStmt *FS = dyn_cast<ForStmt>(S)) {
++     StmtLoc = FS->getRParenLoc();
++     Body = FS->getBody();
++     DiagID = diag::warn_empty_for_body;
++   } else if (const WhileStmt *WS = dyn_cast<WhileStmt>(S)) {
++     StmtLoc = WS->getCond()->getSourceRange().getEnd();
++     Body = WS->getBody();
++     DiagID = diag::warn_empty_while_body;
++   } else
++     return; // Neither `for' nor `while'.
++ 
++   // The body should be a null statement.
++   const NullStmt *NBody = dyn_cast<NullStmt>(Body);
++   if (!NBody)
++     return;
++ 
++   // Skip expensive checks if diagnostic is disabled.
++   if (Diags.isIgnored(DiagID, NBody->getSemiLoc()))
++     return;
++ 
++   // Do the usual checks.
++   if (!ShouldDiagnoseEmptyStmtBody(SourceMgr, StmtLoc, NBody))
++     return;
++ 
++   // `for(...);' and `while(...);' are popular idioms, so in order to keep
++   // noise level low, emit diagnostics only if for/while is followed by a
++   // CompoundStmt, e.g.:
++   //    for (int i = 0; i < n; i++);
++   //    {
++   //      a(i);
++   //    }
++   // or if for/while is followed by a statement with more indentation
++   // than for/while itself:
++   //    for (int i = 0; i < n; i++);
++   //      a(i);
++   bool ProbableTypo = isa<CompoundStmt>(PossibleBody);
++   if (!ProbableTypo) {
++     bool BodyColInvalid;
++     unsigned BodyCol = SourceMgr.getPresumedColumnNumber(
++         PossibleBody->getBeginLoc(), &BodyColInvalid);
++     if (BodyColInvalid)
++       return;
++ 
++     bool StmtColInvalid;
++     unsigned StmtCol =
++         SourceMgr.getPresumedColumnNumber(S->getBeginLoc(), &StmtColInvalid);
++     if (StmtColInvalid)
++       return;
++ 
++     if (BodyCol > StmtCol)
++       ProbableTypo = true;
++   }
++ 
++   if (ProbableTypo) {
++     Diag(NBody->getSemiLoc(), DiagID);
++     Diag(NBody->getSemiLoc(), diag::note_empty_body_on_separate_line);
++   }
++ }
++ 
++ //===--- CHECK: Warn on self move with std::move. -------------------------===//
++ 
++ /// DiagnoseSelfMove - Emits a warning if a value is moved to itself.
++ void Sema::DiagnoseSelfMove(const Expr *LHSExpr, const Expr *RHSExpr,
++                              SourceLocation OpLoc) {
++   if (Diags.isIgnored(diag::warn_sizeof_pointer_expr_memaccess, OpLoc))
++     return;
++ 
++   if (inTemplateInstantiation())
++     return;
++ 
++   // Strip parens and casts away.
++   LHSExpr = LHSExpr->IgnoreParenImpCasts();
++   RHSExpr = RHSExpr->IgnoreParenImpCasts();
++ 
++   // Check for a call expression
++   const CallExpr *CE = dyn_cast<CallExpr>(RHSExpr);
++   if (!CE || CE->getNumArgs() != 1)
++     return;
++ 
++   // Check for a call to std::move
++   if (!CE->isCallToStdMove())
++     return;
++ 
++   // Get argument from std::move
++   RHSExpr = CE->getArg(0);
++ 
++   const DeclRefExpr *LHSDeclRef = dyn_cast<DeclRefExpr>(LHSExpr);
++   const DeclRefExpr *RHSDeclRef = dyn_cast<DeclRefExpr>(RHSExpr);
++ 
++   // Two DeclRefExpr's, check that the decls are the same.
++   if (LHSDeclRef && RHSDeclRef) {
++     if (!LHSDeclRef->getDecl() || !RHSDeclRef->getDecl())
++       return;
++     if (LHSDeclRef->getDecl()->getCanonicalDecl() !=
++         RHSDeclRef->getDecl()->getCanonicalDecl())
++       return;
++ 
++     Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
++                                         << LHSExpr->getSourceRange()
++                                         << RHSExpr->getSourceRange();
++     return;
++   }
++ 
++   // Member variables require a different approach to check for self moves.
++   // MemberExpr's are the same if every nested MemberExpr refers to the same
++   // Decl and that the base Expr's are DeclRefExpr's with the same Decl or
++   // the base Expr's are CXXThisExpr's.
++   const Expr *LHSBase = LHSExpr;
++   const Expr *RHSBase = RHSExpr;
++   const MemberExpr *LHSME = dyn_cast<MemberExpr>(LHSExpr);
++   const MemberExpr *RHSME = dyn_cast<MemberExpr>(RHSExpr);
++   if (!LHSME || !RHSME)
++     return;
++ 
++   while (LHSME && RHSME) {
++     if (LHSME->getMemberDecl()->getCanonicalDecl() !=
++         RHSME->getMemberDecl()->getCanonicalDecl())
++       return;
++ 
++     LHSBase = LHSME->getBase();
++     RHSBase = RHSME->getBase();
++     LHSME = dyn_cast<MemberExpr>(LHSBase);
++     RHSME = dyn_cast<MemberExpr>(RHSBase);
++   }
++ 
++   LHSDeclRef = dyn_cast<DeclRefExpr>(LHSBase);
++   RHSDeclRef = dyn_cast<DeclRefExpr>(RHSBase);
++   if (LHSDeclRef && RHSDeclRef) {
++     if (!LHSDeclRef->getDecl() || !RHSDeclRef->getDecl())
++       return;
++     if (LHSDeclRef->getDecl()->getCanonicalDecl() !=
++         RHSDeclRef->getDecl()->getCanonicalDecl())
++       return;
++ 
++     Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
++                                         << LHSExpr->getSourceRange()
++                                         << RHSExpr->getSourceRange();
++     return;
++   }
++ 
++   if (isa<CXXThisExpr>(LHSBase) && isa<CXXThisExpr>(RHSBase))
++     Diag(OpLoc, diag::warn_self_move) << LHSExpr->getType()
++                                         << LHSExpr->getSourceRange()
++                                         << RHSExpr->getSourceRange();
++ }
++ 
++ //===--- Layout compatibility ----------------------------------------------//
++ 
++ static bool isLayoutCompatible(ASTContext &C, QualType T1, QualType T2);
++ 
++ /// Check if two enumeration types are layout-compatible.
++ static bool isLayoutCompatible(ASTContext &C, EnumDecl *ED1, EnumDecl *ED2) {
++   // C++11 [dcl.enum] p8:
++   // Two enumeration types are layout-compatible if they have the same
++   // underlying type.
++   return ED1->isComplete() && ED2->isComplete() &&
++          C.hasSameType(ED1->getIntegerType(), ED2->getIntegerType());
++ }
++ 
++ /// Check if two fields are layout-compatible.
++ static bool isLayoutCompatible(ASTContext &C, FieldDecl *Field1,
++                                FieldDecl *Field2) {
++   if (!isLayoutCompatible(C, Field1->getType(), Field2->getType()))
++     return false;
++ 
++   if (Field1->isBitField() != Field2->isBitField())
++     return false;
++ 
++   if (Field1->isBitField()) {
++     // Make sure that the bit-fields are the same length.
++     unsigned Bits1 = Field1->getBitWidthValue(C);
++     unsigned Bits2 = Field2->getBitWidthValue(C);
++ 
++     if (Bits1 != Bits2)
++       return false;
++   }
++ 
++   return true;
++ }
++ 
++ /// Check if two standard-layout structs are layout-compatible.
++ /// (C++11 [class.mem] p17)
++ static bool isLayoutCompatibleStruct(ASTContext &C, RecordDecl *RD1,
++                                      RecordDecl *RD2) {
++   // If both records are C++ classes, check that base classes match.
++   if (const CXXRecordDecl *D1CXX = dyn_cast<CXXRecordDecl>(RD1)) {
++     // If one of records is a CXXRecordDecl we are in C++ mode,
++     // thus the other one is a CXXRecordDecl, too.
++     const CXXRecordDecl *D2CXX = cast<CXXRecordDecl>(RD2);
++     // Check number of base classes.
++     if (D1CXX->getNumBases() != D2CXX->getNumBases())
++       return false;
++ 
++     // Check the base classes.
++     for (CXXRecordDecl::base_class_const_iterator
++                Base1 = D1CXX->bases_begin(),
++            BaseEnd1 = D1CXX->bases_end(),
++               Base2 = D2CXX->bases_begin();
++          Base1 != BaseEnd1;
++          ++Base1, ++Base2) {
++       if (!isLayoutCompatible(C, Base1->getType(), Base2->getType()))
++         return false;
++     }
++   } else if (const CXXRecordDecl *D2CXX = dyn_cast<CXXRecordDecl>(RD2)) {
++     // If only RD2 is a C++ class, it should have zero base classes.
++     if (D2CXX->getNumBases() > 0)
++       return false;
++   }
++ 
++   // Check the fields.
++   RecordDecl::field_iterator Field2 = RD2->field_begin(),
++                              Field2End = RD2->field_end(),
++                              Field1 = RD1->field_begin(),
++                              Field1End = RD1->field_end();
++   for ( ; Field1 != Field1End && Field2 != Field2End; ++Field1, ++Field2) {
++     if (!isLayoutCompatible(C, *Field1, *Field2))
++       return false;
++   }
++   if (Field1 != Field1End || Field2 != Field2End)
++     return false;
++ 
++   return true;
++ }
++ 
++ /// Check if two standard-layout unions are layout-compatible.
++ /// (C++11 [class.mem] p18)
++ static bool isLayoutCompatibleUnion(ASTContext &C, RecordDecl *RD1,
++                                     RecordDecl *RD2) {
++   llvm::SmallPtrSet<FieldDecl *, 8> UnmatchedFields;
++   for (auto *Field2 : RD2->fields())
++     UnmatchedFields.insert(Field2);
++ 
++   for (auto *Field1 : RD1->fields()) {
++     llvm::SmallPtrSet<FieldDecl *, 8>::iterator
++         I = UnmatchedFields.begin(),
++         E = UnmatchedFields.end();
++ 
++     for ( ; I != E; ++I) {
++       if (isLayoutCompatible(C, Field1, *I)) {
++         bool Result = UnmatchedFields.erase(*I);
++         (void) Result;
++         assert(Result);
++         break;
++       }
++     }
++     if (I == E)
++       return false;
++   }
++ 
++   return UnmatchedFields.empty();
++ }
++ 
++ static bool isLayoutCompatible(ASTContext &C, RecordDecl *RD1,
++                                RecordDecl *RD2) {
++   if (RD1->isUnion() != RD2->isUnion())
++     return false;
++ 
++   if (RD1->isUnion())
++     return isLayoutCompatibleUnion(C, RD1, RD2);
++   else
++     return isLayoutCompatibleStruct(C, RD1, RD2);
++ }
++ 
++ /// Check if two types are layout-compatible in C++11 sense.
++ static bool isLayoutCompatible(ASTContext &C, QualType T1, QualType T2) {
++   if (T1.isNull() || T2.isNull())
++     return false;
++ 
++   // C++11 [basic.types] p11:
++   // If two types T1 and T2 are the same type, then T1 and T2 are
++   // layout-compatible types.
++   if (C.hasSameType(T1, T2))
++     return true;
++ 
++   T1 = T1.getCanonicalType().getUnqualifiedType();
++   T2 = T2.getCanonicalType().getUnqualifiedType();
++ 
++   const Type::TypeClass TC1 = T1->getTypeClass();
++   const Type::TypeClass TC2 = T2->getTypeClass();
++ 
++   if (TC1 != TC2)
++     return false;
++ 
++   if (TC1 == Type::Enum) {
++     return isLayoutCompatible(C,
++                               cast<EnumType>(T1)->getDecl(),
++                               cast<EnumType>(T2)->getDecl());
++   } else if (TC1 == Type::Record) {
++     if (!T1->isStandardLayoutType() || !T2->isStandardLayoutType())
++       return false;
++ 
++     return isLayoutCompatible(C,
++                               cast<RecordType>(T1)->getDecl(),
++                               cast<RecordType>(T2)->getDecl());
++   }
++ 
++   return false;
++ }
++ 
++ //===--- CHECK: pointer_with_type_tag attribute: datatypes should match ----//
++ 
++ /// Given a type tag expression find the type tag itself.
++ ///
++ /// \param TypeExpr Type tag expression, as it appears in user's code.
++ ///
++ /// \param VD Declaration of an identifier that appears in a type tag.
++ ///
++ /// \param MagicValue Type tag magic value.
++ ///
++ /// \param isConstantEvaluated whether the evalaution should be performed in
++ 
++ /// constant context.
++ static bool FindTypeTagExpr(const Expr *TypeExpr, const ASTContext &Ctx,
++                             const ValueDecl **VD, uint64_t *MagicValue,
++                             bool isConstantEvaluated) {
++   while(true) {
++     if (!TypeExpr)
++       return false;
++ 
++     TypeExpr = TypeExpr->IgnoreParenImpCasts()->IgnoreParenCasts();
++ 
++     switch (TypeExpr->getStmtClass()) {
++     case Stmt::UnaryOperatorClass: {
++       const UnaryOperator *UO = cast<UnaryOperator>(TypeExpr);
++       if (UO->getOpcode() == UO_AddrOf || UO->getOpcode() == UO_Deref) {
++         TypeExpr = UO->getSubExpr();
++         continue;
++       }
++       return false;
++     }
++ 
++     case Stmt::DeclRefExprClass: {
++       const DeclRefExpr *DRE = cast<DeclRefExpr>(TypeExpr);
++       *VD = DRE->getDecl();
++       return true;
++     }
++ 
++     case Stmt::IntegerLiteralClass: {
++       const IntegerLiteral *IL = cast<IntegerLiteral>(TypeExpr);
++       llvm::APInt MagicValueAPInt = IL->getValue();
++       if (MagicValueAPInt.getActiveBits() <= 64) {
++         *MagicValue = MagicValueAPInt.getZExtValue();
++         return true;
++       } else
++         return false;
++     }
++ 
++     case Stmt::BinaryConditionalOperatorClass:
++     case Stmt::ConditionalOperatorClass: {
++       const AbstractConditionalOperator *ACO =
++           cast<AbstractConditionalOperator>(TypeExpr);
++       bool Result;
++       if (ACO->getCond()->EvaluateAsBooleanCondition(Result, Ctx,
++                                                      isConstantEvaluated)) {
++         if (Result)
++           TypeExpr = ACO->getTrueExpr();
++         else
++           TypeExpr = ACO->getFalseExpr();
++         continue;
++       }
++       return false;
++     }
++ 
++     case Stmt::BinaryOperatorClass: {
++       const BinaryOperator *BO = cast<BinaryOperator>(TypeExpr);
++       if (BO->getOpcode() == BO_Comma) {
++         TypeExpr = BO->getRHS();
++         continue;
++       }
++       return false;
++     }
++ 
++     default:
++       return false;
++     }
++   }
++ }
++ 
++ /// Retrieve the C type corresponding to type tag TypeExpr.
++ ///
++ /// \param TypeExpr Expression that specifies a type tag.
++ ///
++ /// \param MagicValues Registered magic values.
++ ///
++ /// \param FoundWrongKind Set to true if a type tag was found, but of a wrong
++ ///        kind.
++ ///
++ /// \param TypeInfo Information about the corresponding C type.
++ ///
++ /// \param isConstantEvaluated whether the evalaution should be performed in
++ /// constant context.
++ ///
++ /// \returns true if the corresponding C type was found.
++ static bool GetMatchingCType(
++     const IdentifierInfo *ArgumentKind, const Expr *TypeExpr,
++     const ASTContext &Ctx,
++     const llvm::DenseMap<Sema::TypeTagMagicValue, Sema::TypeTagData>
++         *MagicValues,
++     bool &FoundWrongKind, Sema::TypeTagData &TypeInfo,
++     bool isConstantEvaluated) {
++   FoundWrongKind = false;
++ 
++   // Variable declaration that has type_tag_for_datatype attribute.
++   const ValueDecl *VD = nullptr;
++ 
++   uint64_t MagicValue;
++ 
++   if (!FindTypeTagExpr(TypeExpr, Ctx, &VD, &MagicValue, isConstantEvaluated))
++     return false;
++ 
++   if (VD) {
++     if (TypeTagForDatatypeAttr *I = VD->getAttr<TypeTagForDatatypeAttr>()) {
++       if (I->getArgumentKind() != ArgumentKind) {
++         FoundWrongKind = true;
++         return false;
++       }
++       TypeInfo.Type = I->getMatchingCType();
++       TypeInfo.LayoutCompatible = I->getLayoutCompatible();
++       TypeInfo.MustBeNull = I->getMustBeNull();
++       return true;
++     }
++     return false;
++   }
++ 
++   if (!MagicValues)
++     return false;
++ 
++   llvm::DenseMap<Sema::TypeTagMagicValue,
++                  Sema::TypeTagData>::const_iterator I =
++       MagicValues->find(std::make_pair(ArgumentKind, MagicValue));
++   if (I == MagicValues->end())
++     return false;
++ 
++   TypeInfo = I->second;
++   return true;
++ }
++ 
++ void Sema::RegisterTypeTagForDatatype(const IdentifierInfo *ArgumentKind,
++                                       uint64_t MagicValue, QualType Type,
++                                       bool LayoutCompatible,
++                                       bool MustBeNull) {
++   if (!TypeTagForDatatypeMagicValues)
++     TypeTagForDatatypeMagicValues.reset(
++         new llvm::DenseMap<TypeTagMagicValue, TypeTagData>);
++ 
++   TypeTagMagicValue Magic(ArgumentKind, MagicValue);
++   (*TypeTagForDatatypeMagicValues)[Magic] =
++       TypeTagData(Type, LayoutCompatible, MustBeNull);
++ }
++ 
++ static bool IsSameCharType(QualType T1, QualType T2) {
++   const BuiltinType *BT1 = T1->getAs<BuiltinType>();
++   if (!BT1)
++     return false;
++ 
++   const BuiltinType *BT2 = T2->getAs<BuiltinType>();
++   if (!BT2)
++     return false;
++ 
++   BuiltinType::Kind T1Kind = BT1->getKind();
++   BuiltinType::Kind T2Kind = BT2->getKind();
++ 
++   return (T1Kind == BuiltinType::SChar  && T2Kind == BuiltinType::Char_S) ||
++          (T1Kind == BuiltinType::UChar  && T2Kind == BuiltinType::Char_U) ||
++          (T1Kind == BuiltinType::Char_U && T2Kind == BuiltinType::UChar) ||
++          (T1Kind == BuiltinType::Char_S && T2Kind == BuiltinType::SChar);
++ }
++ 
++ void Sema::CheckArgumentWithTypeTag(const ArgumentWithTypeTagAttr *Attr,
++                                     const ArrayRef<const Expr *> ExprArgs,
++                                     SourceLocation CallSiteLoc) {
++   const IdentifierInfo *ArgumentKind = Attr->getArgumentKind();
++   bool IsPointerAttr = Attr->getIsPointer();
++ 
++   // Retrieve the argument representing the 'type_tag'.
++   unsigned TypeTagIdxAST = Attr->getTypeTagIdx().getASTIndex();
++   if (TypeTagIdxAST >= ExprArgs.size()) {
++     Diag(CallSiteLoc, diag::err_tag_index_out_of_range)
++         << 0 << Attr->getTypeTagIdx().getSourceIndex();
++     return;
++   }
++   const Expr *TypeTagExpr = ExprArgs[TypeTagIdxAST];
++   bool FoundWrongKind;
++   TypeTagData TypeInfo;
++   if (!GetMatchingCType(ArgumentKind, TypeTagExpr, Context,
++                         TypeTagForDatatypeMagicValues.get(), FoundWrongKind,
++                         TypeInfo, isConstantEvaluated())) {
++     if (FoundWrongKind)
++       Diag(TypeTagExpr->getExprLoc(),
++            diag::warn_type_tag_for_datatype_wrong_kind)
++         << TypeTagExpr->getSourceRange();
++     return;
++   }
++ 
++   // Retrieve the argument representing the 'arg_idx'.
++   unsigned ArgumentIdxAST = Attr->getArgumentIdx().getASTIndex();
++   if (ArgumentIdxAST >= ExprArgs.size()) {
++     Diag(CallSiteLoc, diag::err_tag_index_out_of_range)
++         << 1 << Attr->getArgumentIdx().getSourceIndex();
++     return;
++   }
++   const Expr *ArgumentExpr = ExprArgs[ArgumentIdxAST];
++   if (IsPointerAttr) {
++     // Skip implicit cast of pointer to `void *' (as a function argument).
++     if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgumentExpr))
++       if (ICE->getType()->isVoidPointerType() &&
++           ICE->getCastKind() == CK_BitCast)
++         ArgumentExpr = ICE->getSubExpr();
++   }
++   QualType ArgumentType = ArgumentExpr->getType();
++ 
++   // Passing a `void*' pointer shouldn't trigger a warning.
++   if (IsPointerAttr && ArgumentType->isVoidPointerType())
++     return;
++ 
++   if (TypeInfo.MustBeNull) {
++     // Type tag with matching void type requires a null pointer.
++     if (!ArgumentExpr->isNullPointerConstant(Context,
++                                              Expr::NPC_ValueDependentIsNotNull)) {
++       Diag(ArgumentExpr->getExprLoc(),
++            diag::warn_type_safety_null_pointer_required)
++           << ArgumentKind->getName()
++           << ArgumentExpr->getSourceRange()
++           << TypeTagExpr->getSourceRange();
++     }
++     return;
++   }
++ 
++   QualType RequiredType = TypeInfo.Type;
++   if (IsPointerAttr)
++     RequiredType = Context.getPointerType(RequiredType);
++ 
++   bool mismatch = false;
++   if (!TypeInfo.LayoutCompatible) {
++     mismatch = !Context.hasSameType(ArgumentType, RequiredType);
++ 
++     // C++11 [basic.fundamental] p1:
++     // Plain char, signed char, and unsigned char are three distinct types.
++     //
++     // But we treat plain `char' as equivalent to `signed char' or `unsigned
++     // char' depending on the current char signedness mode.
++     if (mismatch)
++       if ((IsPointerAttr && IsSameCharType(ArgumentType->getPointeeType(),
++                                            RequiredType->getPointeeType())) ||
++           (!IsPointerAttr && IsSameCharType(ArgumentType, RequiredType)))
++         mismatch = false;
++   } else
++     if (IsPointerAttr)
++       mismatch = !isLayoutCompatible(Context,
++                                      ArgumentType->getPointeeType(),
++                                      RequiredType->getPointeeType());
++     else
++       mismatch = !isLayoutCompatible(Context, ArgumentType, RequiredType);
++ 
++   if (mismatch)
++     Diag(ArgumentExpr->getExprLoc(), diag::warn_type_safety_type_mismatch)
++         << ArgumentType << ArgumentKind
++         << TypeInfo.LayoutCompatible << RequiredType
++         << ArgumentExpr->getSourceRange()
++         << TypeTagExpr->getSourceRange();
++ }
++ 
++ void Sema::AddPotentialMisalignedMembers(Expr *E, RecordDecl *RD, ValueDecl *MD,
++                                          CharUnits Alignment) {
++   MisalignedMembers.emplace_back(E, RD, MD, Alignment);
++ }
++ 
++ void Sema::DiagnoseMisalignedMembers() {
++   for (MisalignedMember &m : MisalignedMembers) {
++     const NamedDecl *ND = m.RD;
++     if (ND->getName().empty()) {
++       if (const TypedefNameDecl *TD = m.RD->getTypedefNameForAnonDecl())
++         ND = TD;
++     }
++     Diag(m.E->getBeginLoc(), diag::warn_taking_address_of_packed_member)
++         << m.MD << ND << m.E->getSourceRange();
++   }
++   MisalignedMembers.clear();
++ }
++ 
++ void Sema::DiscardMisalignedMemberAddress(const Type *T, Expr *E) {
++   E = E->IgnoreParens();
++   if (!T->isPointerType() && !T->isIntegerType())
++     return;
++   if (isa<UnaryOperator>(E) &&
++       cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf) {
++     auto *Op = cast<UnaryOperator>(E)->getSubExpr()->IgnoreParens();
++     if (isa<MemberExpr>(Op)) {
++       auto MA = llvm::find(MisalignedMembers, MisalignedMember(Op));
++       if (MA != MisalignedMembers.end() &&
++           (T->isIntegerType() ||
++            (T->isPointerType() && (T->getPointeeType()->isIncompleteType() ||
++                                    Context.getTypeAlignInChars(
++                                        T->getPointeeType()) <= MA->Alignment))))
++         MisalignedMembers.erase(MA);
++     }
++   }
++ }
++ 
++ void Sema::RefersToMemberWithReducedAlignment(
++     Expr *E,
++     llvm::function_ref<void(Expr *, RecordDecl *, FieldDecl *, CharUnits)>
++         Action) {
++   const auto *ME = dyn_cast<MemberExpr>(E);
++   if (!ME)
++     return;
++ 
++   // No need to check expressions with an __unaligned-qualified type.
++   if (E->getType().getQualifiers().hasUnaligned())
++     return;
++ 
++   // For a chain of MemberExpr like "a.b.c.d" this list
++   // will keep FieldDecl's like [d, c, b].
++   SmallVector<FieldDecl *, 4> ReverseMemberChain;
++   const MemberExpr *TopME = nullptr;
++   bool AnyIsPacked = false;
++   do {
++     QualType BaseType = ME->getBase()->getType();
++     if (BaseType->isDependentType())
++       return;
++     if (ME->isArrow())
++       BaseType = BaseType->getPointeeType();
++     RecordDecl *RD = BaseType->castAs<RecordType>()->getDecl();
++     if (RD->isInvalidDecl())
++       return;
++ 
++     ValueDecl *MD = ME->getMemberDecl();
++     auto *FD = dyn_cast<FieldDecl>(MD);
++     // We do not care about non-data members.
++     if (!FD || FD->isInvalidDecl())
++       return;
++ 
++     AnyIsPacked =
++         AnyIsPacked || (RD->hasAttr<PackedAttr>() || MD->hasAttr<PackedAttr>());
++     ReverseMemberChain.push_back(FD);
++ 
++     TopME = ME;
++     ME = dyn_cast<MemberExpr>(ME->getBase()->IgnoreParens());
++   } while (ME);
++   assert(TopME && "We did not compute a topmost MemberExpr!");
++ 
++   // Not the scope of this diagnostic.
++   if (!AnyIsPacked)
++     return;
++ 
++   const Expr *TopBase = TopME->getBase()->IgnoreParenImpCasts();
++   const auto *DRE = dyn_cast<DeclRefExpr>(TopBase);
++   // TODO: The innermost base of the member expression may be too complicated.
++   // For now, just disregard these cases. This is left for future
++   // improvement.
++   if (!DRE && !isa<CXXThisExpr>(TopBase))
++       return;
++ 
++   // Alignment expected by the whole expression.
++   CharUnits ExpectedAlignment = Context.getTypeAlignInChars(E->getType());
++ 
++   // No need to do anything else with this case.
++   if (ExpectedAlignment.isOne())
++     return;
++ 
++   // Synthesize offset of the whole access.
++   CharUnits Offset;
++   for (auto I = ReverseMemberChain.rbegin(); I != ReverseMemberChain.rend();
++        I++) {
++     Offset += Context.toCharUnitsFromBits(Context.getFieldOffset(*I));
++   }
++ 
++   // Compute the CompleteObjectAlignment as the alignment of the whole chain.
++   CharUnits CompleteObjectAlignment = Context.getTypeAlignInChars(
++       ReverseMemberChain.back()->getParent()->getTypeForDecl());
++ 
++   // The base expression of the innermost MemberExpr may give
++   // stronger guarantees than the class containing the member.
++   if (DRE && !TopME->isArrow()) {
++     const ValueDecl *VD = DRE->getDecl();
++     if (!VD->getType()->isReferenceType())
++       CompleteObjectAlignment =
++           std::max(CompleteObjectAlignment, Context.getDeclAlign(VD));
++   }
++ 
++   // Check if the synthesized offset fulfills the alignment.
++   if (Offset % ExpectedAlignment != 0 ||
++       // It may fulfill the offset it but the effective alignment may still be
++       // lower than the expected expression alignment.
++       CompleteObjectAlignment < ExpectedAlignment) {
++     // If this happens, we want to determine a sensible culprit of this.
++     // Intuitively, watching the chain of member expressions from right to
++     // left, we start with the required alignment (as required by the field
++     // type) but some packed attribute in that chain has reduced the alignment.
++     // It may happen that another packed structure increases it again. But if
++     // we are here such increase has not been enough. So pointing the first
++     // FieldDecl that either is packed or else its RecordDecl is,
++     // seems reasonable.
++     FieldDecl *FD = nullptr;
++     CharUnits Alignment;
++     for (FieldDecl *FDI : ReverseMemberChain) {
++       if (FDI->hasAttr<PackedAttr>() ||
++           FDI->getParent()->hasAttr<PackedAttr>()) {
++         FD = FDI;
++         Alignment = std::min(
++             Context.getTypeAlignInChars(FD->getType()),
++             Context.getTypeAlignInChars(FD->getParent()->getTypeForDecl()));
++         break;
++       }
++     }
++     assert(FD && "We did not find a packed FieldDecl!");
++     Action(E, FD->getParent(), FD, Alignment);
++   }
++ }
++ 
++ void Sema::CheckAddressOfPackedMember(Expr *rhs) {
++   using namespace std::placeholders;
++ 
++   RefersToMemberWithReducedAlignment(
++       rhs, std::bind(&Sema::AddPotentialMisalignedMembers, std::ref(*this), _1,
++                      _2, _3, _4));
++ }
++ 
++ ExprResult Sema::SemaBuiltinMatrixTranspose(CallExpr *TheCall,
++                                             ExprResult CallResult) {
++   if (checkArgCount(*this, TheCall, 1))
++     return ExprError();
++ 
++   ExprResult MatrixArg = DefaultLvalueConversion(TheCall->getArg(0));
++   if (MatrixArg.isInvalid())
++     return MatrixArg;
++   Expr *Matrix = MatrixArg.get();
++ 
++   auto *MType = Matrix->getType()->getAs<ConstantMatrixType>();
++   if (!MType) {
++     Diag(Matrix->getBeginLoc(), diag::err_builtin_matrix_arg);
++     return ExprError();
++   }
++ 
++   // Create returned matrix type by swapping rows and columns of the argument
++   // matrix type.
++   QualType ResultType = Context.getConstantMatrixType(
++       MType->getElementType(), MType->getNumColumns(), MType->getNumRows());
++ 
++   // Change the return type to the type of the returned matrix.
++   TheCall->setType(ResultType);
++ 
++   // Update call argument to use the possibly converted matrix argument.
++   TheCall->setArg(0, Matrix);
++   return CallResult;
++ }
++ 
++ // Get and verify the matrix dimensions.
++ static llvm::Optional<unsigned>
++ getAndVerifyMatrixDimension(Expr *Expr, StringRef Name, Sema &S) {
++   SourceLocation ErrorPos;
++   Optional<llvm::APSInt> Value =
++       Expr->getIntegerConstantExpr(S.Context, &ErrorPos);
++   if (!Value) {
++     S.Diag(Expr->getBeginLoc(), diag::err_builtin_matrix_scalar_unsigned_arg)
++         << Name;
++     return {};
++   }
++   uint64_t Dim = Value->getZExtValue();
++   if (!ConstantMatrixType::isDimensionValid(Dim)) {
++     S.Diag(Expr->getBeginLoc(), diag::err_builtin_matrix_invalid_dimension)
++         << Name << ConstantMatrixType::getMaxElementsPerDimension();
++     return {};
++   }
++   return Dim;
++ }
++ 
++ ExprResult Sema::SemaBuiltinMatrixColumnMajorLoad(CallExpr *TheCall,
++                                                   ExprResult CallResult) {
++   if (!getLangOpts().MatrixTypes) {
++     Diag(TheCall->getBeginLoc(), diag::err_builtin_matrix_disabled);
++     return ExprError();
++   }
++ 
++   if (checkArgCount(*this, TheCall, 4))
++     return ExprError();
++ 
++   unsigned PtrArgIdx = 0;
++   Expr *PtrExpr = TheCall->getArg(PtrArgIdx);
++   Expr *RowsExpr = TheCall->getArg(1);
++   Expr *ColumnsExpr = TheCall->getArg(2);
++   Expr *StrideExpr = TheCall->getArg(3);
++ 
++   bool ArgError = false;
++ 
++   // Check pointer argument.
++   {
++     ExprResult PtrConv = DefaultFunctionArrayLvalueConversion(PtrExpr);
++     if (PtrConv.isInvalid())
++       return PtrConv;
++     PtrExpr = PtrConv.get();
++     TheCall->setArg(0, PtrExpr);
++     if (PtrExpr->isTypeDependent()) {
++       TheCall->setType(Context.DependentTy);
++       return TheCall;
++     }
++   }
++ 
++   auto *PtrTy = PtrExpr->getType()->getAs<PointerType>();
++   QualType ElementTy;
++   if (!PtrTy) {
++     Diag(PtrExpr->getBeginLoc(), diag::err_builtin_matrix_pointer_arg)
++         << PtrArgIdx + 1;
++     ArgError = true;
++   } else {
++     ElementTy = PtrTy->getPointeeType().getUnqualifiedType();
++ 
++     if (!ConstantMatrixType::isValidElementType(ElementTy)) {
++       Diag(PtrExpr->getBeginLoc(), diag::err_builtin_matrix_pointer_arg)
++           << PtrArgIdx + 1;
++       ArgError = true;
++     }
++   }
++ 
++   // Apply default Lvalue conversions and convert the expression to size_t.
++   auto ApplyArgumentConversions = [this](Expr *E) {
++     ExprResult Conv = DefaultLvalueConversion(E);
++     if (Conv.isInvalid())
++       return Conv;
++ 
++     return tryConvertExprToType(Conv.get(), Context.getSizeType());
++   };
++ 
++   // Apply conversion to row and column expressions.
++   ExprResult RowsConv = ApplyArgumentConversions(RowsExpr);
++   if (!RowsConv.isInvalid()) {
++     RowsExpr = RowsConv.get();
++     TheCall->setArg(1, RowsExpr);
++   } else
++     RowsExpr = nullptr;
++ 
++   ExprResult ColumnsConv = ApplyArgumentConversions(ColumnsExpr);
++   if (!ColumnsConv.isInvalid()) {
++     ColumnsExpr = ColumnsConv.get();
++     TheCall->setArg(2, ColumnsExpr);
++   } else
++     ColumnsExpr = nullptr;
++ 
++   // If any any part of the result matrix type is still pending, just use
++   // Context.DependentTy, until all parts are resolved.
++   if ((RowsExpr && RowsExpr->isTypeDependent()) ||
++       (ColumnsExpr && ColumnsExpr->isTypeDependent())) {
++     TheCall->setType(Context.DependentTy);
++     return CallResult;
++   }
++ 
++   // Check row and column dimensions.
++   llvm::Optional<unsigned> MaybeRows;
++   if (RowsExpr)
++     MaybeRows = getAndVerifyMatrixDimension(RowsExpr, "row", *this);
++ 
++   llvm::Optional<unsigned> MaybeColumns;
++   if (ColumnsExpr)
++     MaybeColumns = getAndVerifyMatrixDimension(ColumnsExpr, "column", *this);
++ 
++   // Check stride argument.
++   ExprResult StrideConv = ApplyArgumentConversions(StrideExpr);
++   if (StrideConv.isInvalid())
++     return ExprError();
++   StrideExpr = StrideConv.get();
++   TheCall->setArg(3, StrideExpr);
++ 
++   if (MaybeRows) {
++     if (Optional<llvm::APSInt> Value =
++             StrideExpr->getIntegerConstantExpr(Context)) {
++       uint64_t Stride = Value->getZExtValue();
++       if (Stride < *MaybeRows) {
++         Diag(StrideExpr->getBeginLoc(),
++              diag::err_builtin_matrix_stride_too_small);
++         ArgError = true;
++       }
++     }
++   }
++ 
++   if (ArgError || !MaybeRows || !MaybeColumns)
++     return ExprError();
++ 
++   TheCall->setType(
++       Context.getConstantMatrixType(ElementTy, *MaybeRows, *MaybeColumns));
++   return CallResult;
++ }
++ 
++ ExprResult Sema::SemaBuiltinMatrixColumnMajorStore(CallExpr *TheCall,
++                                                    ExprResult CallResult) {
++   if (checkArgCount(*this, TheCall, 3))
++     return ExprError();
++ 
++   unsigned PtrArgIdx = 1;
++   Expr *MatrixExpr = TheCall->getArg(0);
++   Expr *PtrExpr = TheCall->getArg(PtrArgIdx);
++   Expr *StrideExpr = TheCall->getArg(2);
++ 
++   bool ArgError = false;
++ 
++   {
++     ExprResult MatrixConv = DefaultLvalueConversion(MatrixExpr);
++     if (MatrixConv.isInvalid())
++       return MatrixConv;
++     MatrixExpr = MatrixConv.get();
++     TheCall->setArg(0, MatrixExpr);
++   }
++   if (MatrixExpr->isTypeDependent()) {
++     TheCall->setType(Context.DependentTy);
++     return TheCall;
++   }
++ 
++   auto *MatrixTy = MatrixExpr->getType()->getAs<ConstantMatrixType>();
++   if (!MatrixTy) {
++     Diag(MatrixExpr->getBeginLoc(), diag::err_builtin_matrix_arg) << 0;
++     ArgError = true;
++   }
++ 
++   {
++     ExprResult PtrConv = DefaultFunctionArrayLvalueConversion(PtrExpr);
++     if (PtrConv.isInvalid())
++       return PtrConv;
++     PtrExpr = PtrConv.get();
++     TheCall->setArg(1, PtrExpr);
++     if (PtrExpr->isTypeDependent()) {
++       TheCall->setType(Context.DependentTy);
++       return TheCall;
++     }
++   }
++ 
++   // Check pointer argument.
++   auto *PtrTy = PtrExpr->getType()->getAs<PointerType>();
++   if (!PtrTy) {
++     Diag(PtrExpr->getBeginLoc(), diag::err_builtin_matrix_pointer_arg)
++         << PtrArgIdx + 1;
++     ArgError = true;
++   } else {
++     QualType ElementTy = PtrTy->getPointeeType();
++     if (ElementTy.isConstQualified()) {
++       Diag(PtrExpr->getBeginLoc(), diag::err_builtin_matrix_store_to_const);
++       ArgError = true;
++     }
++     ElementTy = ElementTy.getUnqualifiedType().getCanonicalType();
++     if (MatrixTy &&
++         !Context.hasSameType(ElementTy, MatrixTy->getElementType())) {
++       Diag(PtrExpr->getBeginLoc(),
++            diag::err_builtin_matrix_pointer_arg_mismatch)
++           << ElementTy << MatrixTy->getElementType();
++       ArgError = true;
++     }
++   }
++ 
++   // Apply default Lvalue conversions and convert the stride expression to
++   // size_t.
++   {
++     ExprResult StrideConv = DefaultLvalueConversion(StrideExpr);
++     if (StrideConv.isInvalid())
++       return StrideConv;
++ 
++     StrideConv = tryConvertExprToType(StrideConv.get(), Context.getSizeType());
++     if (StrideConv.isInvalid())
++       return StrideConv;
++     StrideExpr = StrideConv.get();
++     TheCall->setArg(2, StrideExpr);
++   }
++ 
++   // Check stride argument.
++   if (MatrixTy) {
++     if (Optional<llvm::APSInt> Value =
++             StrideExpr->getIntegerConstantExpr(Context)) {
++       uint64_t Stride = Value->getZExtValue();
++       if (Stride < MatrixTy->getNumRows()) {
++         Diag(StrideExpr->getBeginLoc(),
++              diag::err_builtin_matrix_stride_too_small);
++         ArgError = true;
++       }
++     }
++   }
++ 
++   if (ArgError)
++     return ExprError();
++ 
++   return CallResult;
++ }
++ 
++ /// \brief Enforce the bounds of a TCB
++ /// CheckTCBEnforcement - Enforces that every function in a named TCB only
++ /// directly calls other functions in the same TCB as marked by the enforce_tcb
++ /// and enforce_tcb_leaf attributes.
++ void Sema::CheckTCBEnforcement(const CallExpr *TheCall,
++                                const FunctionDecl *Callee) {
++   const FunctionDecl *Caller = getCurFunctionDecl();
++ 
++   // Calls to builtins are not enforced.
++   if (!Caller || !Caller->hasAttr<EnforceTCBAttr>() ||
++       Callee->getBuiltinID() != 0)
++     return;
++ 
++   // Search through the enforce_tcb and enforce_tcb_leaf attributes to find
++   // all TCBs the callee is a part of.
++   llvm::StringSet<> CalleeTCBs;
++   for_each(Callee->specific_attrs<EnforceTCBAttr>(),
++            [&](const auto *A) { CalleeTCBs.insert(A->getTCBName()); });
++   for_each(Callee->specific_attrs<EnforceTCBLeafAttr>(),
++            [&](const auto *A) { CalleeTCBs.insert(A->getTCBName()); });
++ 
++   // Go through the TCBs the caller is a part of and emit warnings if Caller
++   // is in a TCB that the Callee is not.
++   for_each(
++       Caller->specific_attrs<EnforceTCBAttr>(),
++       [&](const auto *A) {
++         StringRef CallerTCB = A->getTCBName();
++         if (CalleeTCBs.count(CallerTCB) == 0) {
++           this->Diag(TheCall->getExprLoc(),
++                      diag::warn_tcb_enforcement_violation) << Callee
++                                                            << CallerTCB;
++         }
++       });
++ }
++diff --git a/clang/test/Sema/warn-bitwise-and-bool.c b/clang/test/Sema/warn-bitwise-and-bool.c
++new file mode 100644
++index 000000000000..146ed95eee4b
++--- /dev/null
+++++ b/clang/test/Sema/warn-bitwise-and-bool.c
++@@ -0,0 +1,56 @@
+++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++
+++#ifdef __cplusplus
+++typedef bool boolean;
+++#else
+++typedef _Bool boolean;
+++#endif
+++
+++boolean foo(void);
+++boolean bar(void);
+++boolean baz(void) __attribute__((const));
+++void sink(boolean);
+++
+++#define FOO foo()
+++
+++void test(boolean a, boolean b, int *p, volatile int *q, int i) {
+++  b = a & b;
+++  b = foo() & a;
+++  b = (p != 0) & (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
+++  b = foo() & (*q == 42);      // expected-warning {{use of bitwise '&' with boolean operands}}
+++  b = foo() & (int)(*q == 42); // OK, no warning expected
+++  b = a & foo();
+++  b = (int)a & foo();     // OK, no warning expected
+++  b = foo() & bar();      // expected-warning {{use of bitwise '&' with boolean operands}}
+++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"&&"
+++  b = foo() & (int)bar(); // OK, no warning expected
+++  b = foo() & !bar();     // expected-warning {{use of bitwise '&' with boolean operands}}
+++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"&&"
+++  b = a & baz();
+++  b = bar() & FOO;      // expected-warning {{use of bitwise '&' with boolean operands}}
+++                        // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"&&"
+++  b = foo() & (int)FOO; // OK, no warning expected
+++  b = b & foo();
+++  b = bar() & (i > 4);
+++  b = (i == 7) & foo();
+++#ifdef __cplusplus
+++  b = foo() bitand bar(); // expected-warning {{use of bitwise '&' with boolean operands}}
+++#endif
+++
+++  if (foo() & bar()) // expected-warning {{use of bitwise '&' with boolean operands}}
+++    ;
+++
+++  sink(a & b);
+++  sink(a & foo());
+++  sink(foo() & bar()); // expected-warning {{use of bitwise '&' with boolean operands}}
+++
+++  int n = i + 10;
+++  b = (n & (n - 1));
+++}
++diff --git a/clang/test/Sema/warn-bitwise-or-bool.c b/clang/test/Sema/warn-bitwise-or-bool.c
++new file mode 100644
++index 000000000000..2fb9265d33a5
++--- /dev/null
+++++ b/clang/test/Sema/warn-bitwise-or-bool.c
++@@ -0,0 +1,56 @@
+++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+++
+++#ifdef __cplusplus
+++typedef bool boolean;
+++#else
+++typedef _Bool boolean;
+++#endif
+++
+++boolean foo(void);
+++boolean bar(void);
+++boolean baz(void) __attribute__((const));
+++void sink(boolean);
+++
+++#define FOO foo()
+++
+++void test(boolean a, boolean b, int *p, volatile int *q, int i) {
+++  b = a | b;
+++  b = foo() | a;
+++  b = (p != 0) | (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
+++  b = foo() | (*q == 42);      // expected-warning {{use of bitwise '|' with boolean operands}}
+++  b = foo() | (int)(*q == 42); // OK, no warning expected
+++  b = a | foo();
+++  b = (int)a | foo();     // OK, no warning expected
+++  b = foo() | bar();      // expected-warning {{use of bitwise '|' with boolean operands}}
+++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"||"
+++  b = foo() | !bar();     // expected-warning {{use of bitwise '|' with boolean operands}}
+++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"||"
+++  b = foo() | (int)bar(); // OK, no warning expected
+++  b = a | baz();
+++  b = bar() | FOO;      // expected-warning {{use of bitwise '|' with boolean operands}}
+++                        // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:13-[[@LINE-1]]:14}:"||"
+++  b = foo() | (int)FOO; // OK, no warning expected
+++  b = b | foo();
+++  b = bar() | (i > 4);
+++  b = (i == 7) | foo();
+++#ifdef __cplusplus
+++  b = foo() bitor bar(); // expected-warning {{use of bitwise '|' with boolean operands}}
+++#endif
+++
+++  if (foo() | bar()) // expected-warning {{use of bitwise '|' with boolean operands}}
+++    ;
+++
+++  sink(a | b);
+++  sink(a | foo());
+++  sink(foo() | bar()); // expected-warning {{use of bitwise '|' with boolean operands}}
+++
+++  int n = i + 10;
+++  b = (n | (n - 1));
+++}
+diff --git a/clang/test/Sema/warn-bitwise-and-bool.c b/clang/test/Sema/warn-bitwise-and-bool.c
+new file mode 100644
+index 000000000000..3b54287047fb
+--- /dev/null
++++ b/clang/test/Sema/warn-bitwise-and-bool.c
+@@ -0,0 +1,63 @@
++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
++// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++
++#ifdef __cplusplus
++typedef bool boolean;
++#else
++typedef _Bool boolean;
++#endif
++
++boolean foo(void);
++boolean bar(void);
++boolean baz(void) __attribute__((const));
++void sink(boolean);
++
++#define FOO foo()
++
++void test(boolean a, boolean b, int *p, volatile int *q, int i) {
++  b = a & b;
++  b = foo() & a;
++  b = (p != 0) & (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
++  b = foo() & (*q == 42);      // expected-warning {{use of bitwise '&' with boolean operands}}
++                               // expected-note@-1 {{cast one or both operands to int to silence warning}}
++  b = foo() & (int)(*q == 42); // OK, no warning expected
++  b = a & foo();
++  b = (int)a & foo();     // OK, no warning expected
++  b = foo() & bar();      // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
++  b = foo() & (int)bar(); // OK, no warning expected
++  b = foo() & !bar();     // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
++  b = a & baz();
++  b = bar() & FOO;        // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
++  b = foo() & (int)FOO;   // OK, no warning expected
++  b = b & foo();
++  b = bar() & (i > 4);
++  b = (i == 7) & foo();
++#ifdef __cplusplus
++  b = foo() bitand bar(); // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++#endif
++
++  if (foo() & bar())      // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++    ;
++
++  sink(a & b);
++  sink(a & foo());
++  sink(foo() & bar());    // expected-warning {{use of bitwise '&' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++
++  int n = i + 10;
++  b = (n & (n - 1));
++}
+diff --git a/clang/test/Sema/warn-bitwise-or-bool.c b/clang/test/Sema/warn-bitwise-or-bool.c
+new file mode 100644
+index 000000000000..0d6d9965e1f8
+--- /dev/null
++++ b/clang/test/Sema/warn-bitwise-or-bool.c
+@@ -0,0 +1,63 @@
++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
++// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
++// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
++
++#ifdef __cplusplus
++typedef bool boolean;
++#else
++typedef _Bool boolean;
++#endif
++
++boolean foo(void);
++boolean bar(void);
++boolean baz(void) __attribute__((const));
++void sink(boolean);
++
++#define FOO foo()
++
++void test(boolean a, boolean b, int *p, volatile int *q, int i) {
++  b = a | b;
++  b = foo() | a;
++  b = (p != 0) | (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
++  b = foo() | (*q == 42);      // expected-warning {{use of bitwise '|' with boolean operands}}
++                               // expected-note@-1 {{cast one or both operands to int to silence warning}}
++  b = foo() | (int)(*q == 42); // OK, no warning expected
++  b = a | foo();
++  b = (int)a | foo();     // OK, no warning expected
++  b = foo() | bar();      // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
++  b = foo() | !bar();     // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
++  b = foo() | (int)bar(); // OK, no warning expected
++  b = a | baz();
++  b = bar() | FOO;        // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
++  b = foo() | (int)FOO;   // OK, no warning expected
++  b = b | foo();
++  b = bar() | (i > 4);
++  b = (i == 7) | foo();
++#ifdef __cplusplus
++  b = foo() bitor bar();  // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++#endif
++
++  if (foo() | bar())      // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++    ;
++
++  sink(a | b);
++  sink(a | foo());
++  sink(foo() | bar());    // expected-warning {{use of bitwise '|' with boolean operands}}
++                          // expected-note@-1 {{cast one or both operands to int to silence warning}}
++
++  int n = i + 10;
++  b = (n | (n - 1));
++}

clang/test/Sema/warn-bitwise-and-bool.c

+// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
+// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
+// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+
+#ifdef __cplusplus
+typedef bool boolean;
+#else
+typedef _Bool boolean;
+#endif
+
+boolean foo(void);
+boolean bar(void);
+boolean baz(void) __attribute__((const));
+void sink(boolean);
+
+#define FOO foo()
+
+void test(boolean a, boolean b, int *p, volatile int *q, int i) {
+  b = a & b;
+  b = foo() & a;
+  b = (p != 0) & (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
+  b = foo() & (*q == 42);      // expected-warning {{use of bitwise '&' with boolean operands}}
+                               // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+  b = foo() & (int)(*q == 42); // OK, no warning expected
+  b = a & foo();
+  b = (int)a & foo();     // OK, no warning expected
+  b = foo() & bar();      // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
+  b = foo() & (int)bar(); // OK, no warning expected
+  b = foo() & !bar();     // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
+  b = a & baz();
+  b = bar() & FOO;        // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"&&"
+  b = foo() & (int)FOO;   // OK, no warning expected
+  b = b & foo();
+  b = bar() & (i > 4);
+  b = (i == 7) & foo();
+#ifdef __cplusplus
+  b = foo() bitand bar(); // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+#endif
+
+  if (foo() & bar())      // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+    ;
+
+  sink(a & b);
+  sink(a & foo());
+  sink(foo() & bar());    // expected-warning {{use of bitwise '&' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+
+  int n = i + 10;
+  b = (n & (n - 1));
+}

clang/test/Sema/warn-bitwise-or-bool.c

+// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wbool-operation %s
+// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wall %s
+// RUN: %clang_cc1 -x c -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wbool-operation %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wall %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbitwise-instead-of-logical -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -x c++ -fsyntax-only -Wbool-operation -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+
+#ifdef __cplusplus
+typedef bool boolean;
+#else
+typedef _Bool boolean;
+#endif
+
+boolean foo(void);
+boolean bar(void);
+boolean baz(void) __attribute__((const));
+void sink(boolean);
+
+#define FOO foo()
+
+void test(boolean a, boolean b, int *p, volatile int *q, int i) {
+  b = a | b;
+  b = foo() | a;
+  b = (p != 0) | (*p == 42);   // FIXME: also warn for a non-volatile pointer dereference
+  b = foo() | (*q == 42);      // expected-warning {{use of bitwise '|' with boolean operands}}
+                               // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+  b = foo() | (int)(*q == 42); // OK, no warning expected
+  b = a | foo();
+  b = (int)a | foo();     // OK, no warning expected
+  b = foo() | bar();      // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
+  b = foo() | !bar();     // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
+  b = foo() | (int)bar(); // OK, no warning expected
+  b = a | baz();
+  b = bar() | FOO;        // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+                          // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:14}:"||"
+  b = foo() | (int)FOO;   // OK, no warning expected
+  b = b | foo();
+  b = bar() | (i > 4);
+  b = (i == 7) | foo();
+#ifdef __cplusplus
+  b = foo() bitor bar();  // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+#endif
+
+  if (foo() | bar())      // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+    ;
+
+  sink(a | b);
+  sink(a | foo());
+  sink(foo() | bar());    // expected-warning {{use of bitwise '|' with boolean operands}}
+                          // expected-note@-1 {{cast one or both operands to int to silence this warning}}
+
+  int n = i + 10;
+  b = (n | (n - 1));
+}