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george.burgess.iv (George Burgess IV)
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User Since
Jul 15 2014, 12:28 PM (299 w, 5 h)

Recent Activity

Today

george.burgess.iv committed rGff30d015222e: [TLI] fix a function's (commented) signature; NFC (authored by george.burgess.iv).
[TLI] fix a function's (commented) signature; NFC
Tue, Apr 7, 1:37 PM

Yesterday

george.burgess.iv added a comment to D73763: [DSE] Lift post-dominance restriction..

IIUC, the additional set would be used for the non-alloca cases, as we have to ensure that there are overwrites along all paths to the exit.

Mon, Apr 6, 10:51 AM · Restricted Project

Fri, Apr 3

george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

For a more direct comparison, I offer https://godbolt.org/z/fqAhUC . The lack of optimization in the later case is because we're forced to mark the call to __builtin_memcpy in the inline memcpy as nobuiltin. If we instead rename things, this issue doesn't happen: https://godbolt.org/z/FKNTWo.

Fri, Apr 3, 4:16 PM · Restricted Project

Wed, Apr 1

george.burgess.iv added a comment to D73763: [DSE] Lift post-dominance restriction..

I think there are 2 cases to distinguish:

  1. For accesses to non-alloca objects, this matches what the intrinsic achieves I think. We can only eliminate stores to objects that are visible after the function returns, if they are overwritten along all paths to the exit. So if we have determined a set of blocks that overwrite A (and there are no reads in between), we could check if all paths to the exit from A must go through one of the overwriting blocks. I think that matches your suggestion.
Wed, Apr 1, 7:04 PM · Restricted Project

Mon, Mar 30

george.burgess.iv added a comment to D73763: [DSE] Lift post-dominance restriction..

Thanks for working on this!

Mon, Mar 30, 6:03 PM · Restricted Project

Tue, Mar 17

george.burgess.iv accepted D76249: [AliasAnalysis] Misc fixes for checking aliasing with scalable types..

(I really need to circle back and finish the LocationSize migration...)

Tue, Mar 17, 3:40 PM · Restricted Project

Tue, Mar 10

george.burgess.iv accepted D75942: [x86][seses] No lfences in bb w/ 1 load and 0 stores.

Please wait for a stamp from another reviewer here, too.

Tue, Mar 10, 6:05 PM · Restricted Project
george.burgess.iv accepted D75941: [x86][seses] No LFENCEs in basic blocks w/o loads.

LGTM modulo a few cosmetic nits. Similar to the previous review, please wait for approval from someone with more ownership here before landing.

Tue, Mar 10, 5:33 PM · Restricted Project
george.burgess.iv accepted D75939: [x86][seses] Introduce SESES pass for LVI.

Thanks so much for working on this!

Tue, Mar 10, 5:33 PM · Restricted Project

Mon, Mar 9

george.burgess.iv added a comment to D75654: [x86][slh] Move isDataInvariant* functions.

Ack -- I'll do that in the future.

Mon, Mar 9, 7:26 PM · Restricted Project
george.burgess.iv committed rG174c3eb69f19: [x86][slh] Move isDataInvariant* functions (authored by george.burgess.iv).
[x86][slh] Move isDataInvariant* functions
Mon, Mar 9, 5:17 PM
george.burgess.iv committed rGbb0ec1daff1b: [x86][slh][NFC] Rm redundant liveness check (authored by george.burgess.iv).
[x86][slh][NFC] Rm redundant liveness check
Mon, Mar 9, 5:17 PM
george.burgess.iv closed D75654: [x86][slh] Move isDataInvariant* functions.
Mon, Mar 9, 5:17 PM · Restricted Project
george.burgess.iv closed D75650: [x86][slh][NFC] Rm redundant liveness check.
Mon, Mar 9, 5:17 PM · Restricted Project
george.burgess.iv committed rGcfc3e7f458f8: [cmake] Strip quotes in compiler-rt/lib/crt; error if checks fail (authored by george.burgess.iv).
[cmake] Strip quotes in compiler-rt/lib/crt; error if checks fail
Mon, Mar 9, 4:13 PM
george.burgess.iv committed rG20dfcf189d22: [cmake] By default do not build compiler-rt with PGO (authored by george.burgess.iv).
[cmake] By default do not build compiler-rt with PGO
Mon, Mar 9, 4:13 PM
george.burgess.iv closed D75499: [cmake] By default do not build compiler-rt with PGO instrumentation or use.
Mon, Mar 9, 4:13 PM · Restricted Project, Restricted Project
george.burgess.iv closed D75065: [cmake] Strip quotes in compiler-rt/lib/crt and explicitly throw error if check executable fails.
Mon, Mar 9, 4:13 PM · Restricted Project, Restricted Project

Mar 5 2020

george.burgess.iv accepted D75654: [x86][slh] Move isDataInvariant* functions.

thanks for this!

Mar 5 2020, 3:21 PM · Restricted Project

Mar 3 2020

george.burgess.iv planned changes to D75492: [clang-tidy]: modernize-use-using: don't diagnose typedefs in `extern "C"` DeclContexts.

I see -- that seems like a much broader change, but also probably worthwhile. I have a few ideas about how to tackle that; let me see what I can come up with locally.

Mar 3 2020, 1:14 PM · Restricted Project, Restricted Project

Mar 2 2020

george.burgess.iv created D75492: [clang-tidy]: modernize-use-using: don't diagnose typedefs in `extern "C"` DeclContexts.
Mar 2 2020, 4:55 PM · Restricted Project, Restricted Project

Feb 24 2020

george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

Friendly ping Gerolf (or anyone else who has opinions on standardish benchmarks) :)

Feb 24 2020, 5:21 PM · Restricted Project

Feb 14 2020

george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

I have concerns on so much plumbing changes to make the small heuristic change.

Feb 14 2020, 2:48 PM · Restricted Project

Feb 13 2020

george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

ping :)

Feb 13 2020, 11:19 AM · Restricted Project

Feb 8 2020

george.burgess.iv closed D74079: [SimplifyLibCalls] Simplify __strlen_chk.
Feb 8 2020, 12:07 PM · Restricted Project
george.burgess.iv committed rGf8c9ceb1ce9c: [SimplifyLibCalls] Add __strlen_chk. (authored by george.burgess.iv).
[SimplifyLibCalls] Add __strlen_chk.
Feb 8 2020, 11:58 AM
george.burgess.iv added a comment to D74079: [SimplifyLibCalls] Simplify __strlen_chk.

Thanks for the review!

Feb 8 2020, 11:58 AM · Restricted Project

Feb 6 2020

george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

Oof, yeah, these look similar, but it's not clear to me if there's a good way to unify them as a part of this patch (or lift this out to there). Lemme poke it a bit and see :)

Feb 6 2020, 5:44 PM · Restricted Project
george.burgess.iv updated the diff for D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

Updated to plumb through the "are we doing ThinLTO || prelink LTO" bit in a way that makes sense to me. Suggestions for potentially better approaches is welcome :)

Feb 6 2020, 5:44 PM · Restricted Project

Feb 5 2020

george.burgess.iv added inline comments to D74079: [SimplifyLibCalls] Simplify __strlen_chk.
Feb 5 2020, 1:21 PM · Restricted Project
george.burgess.iv created D74079: [SimplifyLibCalls] Simplify __strlen_chk.
Feb 5 2020, 11:12 AM · Restricted Project
george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

Yup - I also don't know of any location caching the cost. I wonder if this was a nerver-realized goal, and whether it is abandoned. May be worth checking with the author of the comment?

Feb 5 2020, 11:12 AM · Restricted Project
george.burgess.iv accepted D73853: [llvm-reduce] add ReduceAttribute delta pass.
Feb 5 2020, 10:05 AM · Restricted Project

Feb 4 2020

george.burgess.iv abandoned D49103: Lower llvm.objectsize earlier in our optimization pipeline.

Looks like this was done in https://reviews.llvm.org/D65280; closing

Feb 4 2020, 6:03 PM
george.burgess.iv added a comment to D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.

On the first bullet, I'm trying to find where InlineCost values are cached. Are we doing that?

Feb 4 2020, 2:51 PM · Restricted Project
george.burgess.iv created D73994: [InlineCost] Relax bonus restrictions on uninlinable functions.
Feb 4 2020, 2:05 PM · Restricted Project
george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

Until recently, both CrOS and Android disabled FORTIFY wholesale when any of asan/msan/tsan were active. Bionic recently got support for FORTIFY playing nicely with sanitizers, but that support boils down to "turn off all the FORTIFY runtime checks, but leave the ones that generate compiler diags on."

Feb 4 2020, 1:28 PM · Restricted Project

Feb 3 2020

george.burgess.iv added a comment to D73853: [llvm-reduce] add ReduceAttribute delta pass.

LGTM after this last nit is addressed. Like said, I plan to leave the final stamp to someone with more context. Thanks again!

Feb 3 2020, 3:44 PM · Restricted Project

Feb 2 2020

george.burgess.iv added inline comments to D73679: [MemoryBuiltins] Determine the size of a global w/o initializer.
Feb 2 2020, 11:04 PM · Restricted Project
george.burgess.iv added a comment to D73853: [llvm-reduce] add ReduceAttribute delta pass.

Thanks for this! I'm always happy to see reduction tooling gain new powers :)

Feb 2 2020, 3:02 PM · Restricted Project
george.burgess.iv added a comment to D73679: [MemoryBuiltins] Determine the size of a global w/o initializer.

So there are existing test with 0 sized objects that would fail if we do not have the Size != 0 check but I'll add a few more to nail down what we expect as soon as I find the time. It might take a week or two though.

Feb 2 2020, 2:58 PM · Restricted Project

Jan 30 2020

george.burgess.iv added a comment to D73679: [MemoryBuiltins] Determine the size of a global w/o initializer.

Thanks for this!

Jan 30 2020, 5:28 PM · Restricted Project

Jan 25 2020

george.burgess.iv committed rG2f45a93edfe4: [Support] `const`ify a method; NFC (authored by george.burgess.iv).
[Support] `const`ify a method; NFC
Jan 25 2020, 9:55 PM

Jan 16 2020

george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

(It's interesting to me if gcc doesn't warn about that libcxx code, since the whole point of the gnuc 5.0 check there was "the compiler should check this for us now"...)

Jan 16 2020, 10:13 AM · Restricted Project

Dec 12 2019

george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

Just a few more nits, and this LGTM. Thanks again!

Dec 12 2019, 1:18 PM · Restricted Project

Dec 11 2019

george.burgess.iv added inline comments to D71082: Allow system header to provide their own implementation of some builtin.
Dec 11 2019, 1:42 PM · Restricted Project
george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

Should we also have a quick test-case in Sema/ verifying that we still get the warnings that Eli mentioned?

Dec 11 2019, 10:30 AM · Restricted Project

Dec 5 2019

george.burgess.iv committed rG9b9327fe3064: llvm-reduce: Add a space to an option's --help (authored by george.burgess.iv).
llvm-reduce: Add a space to an option's --help
Dec 5 2019, 7:48 PM
george.burgess.iv added a comment to D71082: Allow system header to provide their own implementation of some builtin.

Thanks for looking into this!

Dec 5 2019, 1:22 PM · Restricted Project

Dec 4 2019

george.burgess.iv added a comment to rG380a6452b2e9: [ASTMatchers] work around a miscompile; "NFC".

Thanks for reviewing!

Dec 4 2019, 9:23 AM

Nov 22 2019

george.burgess.iv committed rG380a6452b2e9: [ASTMatchers] work around a miscompile; "NFC" (authored by george.burgess.iv).
[ASTMatchers] work around a miscompile; "NFC"
Nov 22 2019, 8:20 PM
george.burgess.iv committed rG9f13a032b6d7: clang-tidy: don't use an absolute path in a test (authored by george.burgess.iv).
clang-tidy: don't use an absolute path in a test
Nov 22 2019, 6:13 PM

Oct 15 2019

george.burgess.iv added a comment to D68670: [Utils] Cleanup similar cases to MergeBlockIntoPredecessor..

I don't immediately see any issues with this patch, but it's outside of my area of expertise, so I'll defer to the other reviewers :)

Oct 15 2019, 11:26 AM · Restricted Project

Oct 10 2019

george.burgess.iv accepted D68809: [MemorySSA] Additional handling of unreachable blocks..

Thanks!

Oct 10 2019, 1:07 PM · Restricted Project

Oct 8 2019

george.burgess.iv accepted D68659: [MemorySSA] Make the use of moveAllAfterMergeBlocks consistent..

Thanks for this!

Oct 8 2019, 8:49 PM · Restricted Project

Sep 30 2019

george.burgess.iv added a comment to D38479: Make -mgeneral-regs-only more like GCC's.

Does this have any significant impact on -fsyntax-only performance?

Sep 30 2019, 5:36 PM · Restricted Project
george.burgess.iv updated the diff for D38479: Make -mgeneral-regs-only more like GCC's.

Addressed feedback

Sep 30 2019, 5:33 PM · Restricted Project

Sep 25 2019

george.burgess.iv accepted D67995: [MemorySSA] Avoid adding Phis in the presence of unreachable blocks..

Thanks!

Sep 25 2019, 2:23 PM · Restricted Project

Sep 23 2019

george.burgess.iv accepted D67927: [MemorySSA] Update Phi insertion..

LGTM, since this is a workaround to keep things rolling while we work on a more general fix.

Sep 23 2019, 3:24 PM · Restricted Project

Sep 16 2019

george.burgess.iv accepted D67637: [MemorySSA] Fix phi insertion when inserting a def..

thanks!

Sep 16 2019, 8:52 PM · Restricted Project
george.burgess.iv accepted D67562: [MemorySSA] Update MSSA for non-conventional AA..

Thanks!

Sep 16 2019, 8:49 PM · Restricted Project
george.burgess.iv added a comment to D38479: Make -mgeneral-regs-only more like GCC's.

Apologies for the latency of my updates.

Sep 16 2019, 6:25 PM · Restricted Project
george.burgess.iv updated the diff for D38479: Make -mgeneral-regs-only more like GCC's.

Chatted with Eli offline; updated here to reflect the conclusions of that.

Sep 16 2019, 6:25 PM · Restricted Project

Sep 13 2019

george.burgess.iv added a comment to D67562: [MemorySSA] Update MSSA for non-conventional AA..

thanks for this!

Sep 13 2019, 6:41 PM · Restricted Project

Sep 11 2019

george.burgess.iv accepted D67470: [MemorySSA] Pass (for update) MSSAU when hoisting instructions..

Thanks for this!

Sep 11 2019, 5:03 PM · Restricted Project

Sep 10 2019

george.burgess.iv accepted D67307: [MemorySSA] Do not create memoryaccesses for debug info intrinsics..

thanks!

Sep 10 2019, 3:12 PM · Restricted Project

Sep 6 2019

george.burgess.iv added a comment to D67296: [MemorySSA] Update defining access when instructions are not cloned..

(Now that we have D67307, is this still needed? Happy to review if so, but this seems to be addressing primarily debuginfo-related bits)

Sep 6 2019, 11:10 PM · Restricted Project
george.burgess.iv added a comment to D67307: [MemorySSA] Do not create memoryaccesses for debug info intrinsics..

Thanks for this!

Sep 6 2019, 11:08 PM · Restricted Project

Aug 20 2019

george.burgess.iv accepted D66495: [MemorySSA] Fix existing phis when inserting defs..

Thanks!

Aug 20 2019, 2:57 PM · Restricted Project
george.burgess.iv accepted D66454: [MemorySSA] Make Phi cleanups consistent..

Assuming the test in D66495 (in part) covers this, LGTM with an optional nit.

Aug 20 2019, 2:57 PM · Restricted Project

Aug 15 2019

george.burgess.iv accepted D66033: [MemorySSA] Rename uses when inserting memory uses..

lgtm with a few nits. Thanks!

Aug 15 2019, 5:18 PM · Restricted Project

Aug 5 2019

george.burgess.iv committed rGa5c25c5d469f: [Sema] attempt to appease buildbots after r367940 (authored by george.burgess.iv).
[Sema] attempt to appease buildbots after r367940
Aug 5 2019, 4:24 PM
george.burgess.iv committed rGf708f0a2430f: [Sema] Add -Wpointer-compare (authored by george.burgess.iv).
[Sema] Add -Wpointer-compare
Aug 5 2019, 3:18 PM

Aug 1 2019

george.burgess.iv accepted D65568: [AliasAnalysis] Initialize a member variable that may be used by unit test..

Thanks!

Aug 1 2019, 10:48 AM · Restricted Project

Jul 30 2019

george.burgess.iv accepted D65338: [MemorySSA] Extend allowed behavior for simplified instructions..

Thanks!

Jul 30 2019, 11:31 AM · Restricted Project
george.burgess.iv added inline comments to D65338: [MemorySSA] Extend allowed behavior for simplified instructions..
Jul 30 2019, 11:08 AM · Restricted Project

Jul 29 2019

george.burgess.iv added a comment to D65338: [MemorySSA] Extend allowed behavior for simplified instructions..

Thanks for this! Two nits and a question

Jul 29 2019, 10:15 PM · Restricted Project

Jul 25 2019

george.burgess.iv committed rG9d045a5c1e6b: [Sema] add -Walloca to flag uses of `alloca` (authored by george.burgess.iv).
[Sema] add -Walloca to flag uses of `alloca`
Jul 25 2019, 3:28 PM

Jul 24 2019

george.burgess.iv committed rGcd16fadb9ccd: [BasicAA] Temporarily disable two tests (authored by george.burgess.iv).
[BasicAA] Temporarily disable two tests
Jul 24 2019, 11:55 PM

Jul 23 2019

george.burgess.iv added inline comments to D64883: Add new warning -Walloca for use of builtin alloca function.
Jul 23 2019, 10:25 AM · Restricted Project, Restricted Project

Jul 22 2019

george.burgess.iv added inline comments to D64883: Add new warning -Walloca for use of builtin alloca function.
Jul 22 2019, 6:12 PM · Restricted Project, Restricted Project
george.burgess.iv added inline comments to D64883: Add new warning -Walloca for use of builtin alloca function.
Jul 22 2019, 12:51 PM · Restricted Project, Restricted Project

Jul 19 2019

george.burgess.iv added a comment to D65019: [ARM] push LR before __gnu_mcount_nc.

Thanks for this!

Jul 19 2019, 3:09 PM · Restricted Project, Restricted Project

Jul 17 2019

george.burgess.iv added a comment to D64883: Add new warning -Walloca for use of builtin alloca function.

Thanks for this!

Jul 17 2019, 2:24 PM · Restricted Project, Restricted Project

Jul 16 2019

george.burgess.iv committed rGfdeed837edf3: Fix a typo in target features (authored by george.burgess.iv).
Fix a typo in target features
Jul 16 2019, 3:33 PM
george.burgess.iv added a comment to D64781: Silence backend complaints on x86 Android.

SGTM. Thanks for the review!

Jul 16 2019, 3:32 PM · Restricted Project

Jul 15 2019

george.burgess.iv created D64781: Silence backend complaints on x86 Android.
Jul 15 2019, 5:26 PM · Restricted Project

Jul 11 2019

george.burgess.iv accepted D64601: [MemorySSA] Use SetVector to avoid nondeterminism..

Thanks! If it's easy to come up with a small regression test (like David mentioned on the bug, reverse_iteration may be a great help), please do so and commit it with this. Otherwise, LGTM as-is.

Jul 11 2019, 4:29 PM · Restricted Project

Jul 10 2019

george.burgess.iv accepted D64541: rL365634 adds a unique_ptr<CompilationDatabase> in GobalCompilationDatabase.h:108 but CompilationDatabase is only forward declared. This makes the header not compile standalone, because unique_ptrs expect to have the full-definition of the....

LGTM with one change -- thanks!

Jul 10 2019, 4:25 PM · Restricted Project

Jun 24 2019

george.burgess.iv accepted D63680: [LoopRotate + MemorySSA] Keep an <instruction-cloned instruction> map..

thanks for this!

Jun 24 2019, 2:15 PM · Restricted Project

Jun 21 2019

george.burgess.iv committed rG67d1f8ae6d94: clang-format a block; NFC (authored by george.burgess.iv).
clang-format a block; NFC
Jun 21 2019, 1:52 PM

Jun 20 2019

george.burgess.iv added a comment to D63623: [clang-tidy] new check: bugprone-posix-return.

just a few drive-by nits/comments from me. as usual, not super familiar with clang-tidy, so i won't be able to stamp this.

Jun 20 2019, 2:10 PM · Restricted Project, Restricted Project
george.burgess.iv accepted D63582: [LICM & MSSA] Limit unsafe sinking and hoisting..

LGTM

Jun 20 2019, 1:49 PM · Restricted Project
george.burgess.iv added a comment to D63582: [LICM & MSSA] Limit unsafe sinking and hoisting..

Thanks for this!

Jun 20 2019, 1:01 PM · Restricted Project

Jun 17 2019

george.burgess.iv accepted D63354: [MemorySSA] Cleanup trivial phis..

Thanks!

Jun 17 2019, 7:16 PM · Restricted Project
george.burgess.iv accepted D63147: [MemorySSA] Add additional verification for phis..

Thanks!

Jun 17 2019, 7:09 PM · Restricted Project
george.burgess.iv accepted D63443: [MemorySSA] Use GraphDiff info when computing IDF..

Thanks!

Jun 17 2019, 7:08 PM · Restricted Project

Jun 14 2019

george.burgess.iv accepted D63355: [MemorySSA] Don't use template when the clone is a simplified instruction..

just two stylistic nits; lgtm afterward. thanks for this!

Jun 14 2019, 8:37 PM · Restricted Project
george.burgess.iv accepted D63353: [MemorySSA] Add all MemoryPhis before filling their values..

Thanks!

Jun 14 2019, 8:24 PM · Restricted Project

Jun 13 2019

george.burgess.iv committed rG2c074bb39e25: [Targets] Move soft-float-abi filtering to `initFeatureMap` (authored by george.burgess.iv).
[Targets] Move soft-float-abi filtering to `initFeatureMap`
Jun 13 2019, 5:35 PM