philip.pfaffe (Philip Pfaffe)
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User Since
Apr 21 2015, 2:43 AM (187 w, 2 d)

Recent Activity

Yesterday

philip.pfaffe added a comment to D54794: [NewPM] -print-before/-print-after support for new pass manager.

Is the goal here anything beyond makeing -print-after/before work in the newpm?

Wed, Nov 21, 2:04 PM

Fri, Nov 16

philip.pfaffe added a comment to D54337: [ASan] Make AddressSanitizer a ModulePass.

Sorry for the delayed response. So the main problem is that AddressSantizer needs to perform some initialization involving reading stuff from global metadata and getting some target specific information. More specifically, just these 6 things which are all initialized in doInitialization:

GlobalsMD.init(M);
C = &(M.getContext());
LongSize = M.getDataLayout().getPointerSizeInBits();
IntptrTy = Type::getIntNTy(*C, LongSize);
TargetTriple = Triple(M.getTargetTriple());
Mapping = getShadowMapping(TargetTriple, LongSize, CompileKernel);

If asan doesn't modify the module for this ('this' meaning the Mapping and the GlobalsMD here), than this is an excellent candidate for an analysis.

Fri, Nov 16, 1:17 AM · Restricted Project

Tue, Nov 13

philip.pfaffe retitled D54394: [WIP][NewPM] Port msan from [NewPM] Port msan to [WIP][NewPM] Port msan.
Tue, Nov 13, 11:08 AM

Sun, Nov 11

philip.pfaffe created D54394: [WIP][NewPM] Port msan.
Sun, Nov 11, 10:28 AM

Sat, Nov 10

philip.pfaffe added a comment to D54337: [ASan] Make AddressSanitizer a ModulePass.

Hmm... can you point me where function definitions are being added in doInitialization, I just dont see it (frankly I'm not familiar with this code at all).

I might have been wrong here, I assumed the Asan function pass did this,too, because all sanitizers I've looked at do it. But it's possible that only the Module variant does it.

Sat, Nov 10, 4:02 AM · Restricted Project
philip.pfaffe added a comment to D54337: [ASan] Make AddressSanitizer a ModulePass.

The problem is not speed but correctness. The initialization adds function definitions, which function passes can't do. So we need to initialize out-of-band, either with a separate module pass, or some function outside of the pass pipeline. I strongly prefer the latter, but it's not entirely clear to me how this function should be called. It's obviousl when running this through clang, but what about opt?

Sat, Nov 10, 3:01 AM · Restricted Project
philip.pfaffe added a comment to D54374: [newpm] Add an OptimizerLast EP.

A key difference between this and legacy is at O0, this EP won't be triggered.

Sat, Nov 10, 2:25 AM
philip.pfaffe added a comment to D54337: [ASan] Make AddressSanitizer a ModulePass.

Making this a module pass will cost us all the nice chaining and cache locality we get from a function pass. That will make the already slow instrumentation even more expensive. Do you see a way to keep this as a function pass?

Sat, Nov 10, 1:18 AM · Restricted Project
philip.pfaffe created D54374: [newpm] Add an OptimizerLast EP.
Sat, Nov 10, 1:08 AM

Tue, Nov 6

philip.pfaffe added a comment to D53376: Fix generation of exported targets in build directory.

Commited!

Tue, Nov 6, 7:21 AM

Fri, Nov 2

philip.pfaffe added a comment to D53895: [LoopUnroll] add parsing for unroll parameters in -passes pipeline.

What is the advantage of this over using command line args?

Fri, Nov 2, 9:54 AM

Tue, Oct 30

philip.pfaffe abandoned D49486: [cfe][CMake] Export the clang resource directory.

It looks like running clang will be good enough. I'm closing this for now!

Tue, Oct 30, 4:50 AM

Tue, Oct 23

philip.pfaffe accepted D53376: Fix generation of exported targets in build directory.

LGTM, thanks!

Tue, Oct 23, 6:15 AM

Oct 22 2018

philip.pfaffe added a comment to D53376: Fix generation of exported targets in build directory.

The fix looks alright, but did you test it with CMAKE_BUILD_TYPE set though? It's hard to parse with the naked eye, but it looks like you're missing at least a $ there.

Oct 22 2018, 3:40 AM

Oct 17 2018

philip.pfaffe accepted D52814: [PassManager/Sanitizer] Enable usage of ported AddressSanitizer passes with -fsanitize=address .

LGTM, thank you!

Oct 17 2018, 4:44 AM · Restricted Project, Restricted Project

Oct 15 2018

philip.pfaffe added a comment to D53246: [NewPM] teach -passes= to emit meaningful error messages.

Thanks!

Oct 15 2018, 7:07 AM
philip.pfaffe accepted D53246: [NewPM] teach -passes= to emit meaningful error messages.

This looks good to me, minor nits inline.

Oct 15 2018, 4:14 AM
philip.pfaffe added a comment to D53270: [NewPM] implement SCC printing for -print-before-all/-print-after-all.

So is this just a bugfix? Or does it add functionality?

Oct 15 2018, 1:11 AM
philip.pfaffe added a comment to D53270: [NewPM] implement SCC printing for -print-before-all/-print-after-all.

What was the deficiency of the initial implementation this is fixing?

Oct 15 2018, 12:29 AM

Oct 11 2018

philip.pfaffe added a comment to D52814: [PassManager/Sanitizer] Enable usage of ported AddressSanitizer passes with -fsanitize=address .

You're right, my bad; I missed the fact that it's EP_OptimizerLast, which has no equivalent in the new PM. Your implementation is actually correct here.

Oct 11 2018, 1:20 PM · Restricted Project, Restricted Project
philip.pfaffe accepted D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

This looks great now, thank you!

Oct 11 2018, 7:34 AM · Restricted Project

Oct 10 2018

philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

We're getting there! Some more tiny nits.

Oct 10 2018, 3:54 AM · Restricted Project

Oct 9 2018

philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

I also noticed you got the header in the wrong place. It should live in Transforms/Instrumentation, not in IR.

Oct 9 2018, 4:17 AM · Restricted Project
philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

I see. As far as I can tell, both passes actually use the same options for CompileKernel and Recover when creating new passes, but UseAfterScope is different for both in that the option is passed from a code gen option for AddressSanitizer whereas AddressSanitizerModule sets UseAfterScope as true by default and is dependent on if ASan uses garbage collection friendly instrumentation for globals.

Oct 9 2018, 4:16 AM · Restricted Project

Oct 8 2018

philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

This I'm not sure of since it seems that they both do different things that work independently of each other, though I can't find an example/test where they are used on their own.

I meant just merging the passes. In the sense that you have one pass class with one module run() method and one function run() method. The question then is whether you'll ever want to use different options for the different IRUnits.

Oct 8 2018, 3:06 PM · Restricted Project
philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

Some comments inline. Does it make sense to merge the module and function passes into one? Is it really necessary to distinguish the passes?

Oct 8 2018, 12:34 PM · Restricted Project
philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

See my latest comment. If there is no state to be kept, that state need not be on the exported interface.

Oct 8 2018, 12:12 AM · Restricted Project

Oct 4 2018

philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

Actually I was asking this because as far as I can tell, asan doesn't track state across functions and modules. Which means there's no point in _retaining_ the state, i.e. you don't have to keep an instance of it around.

Oct 4 2018, 2:23 PM · Restricted Project
philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

Well, it will be a bit tricky to avoid moving the interfaces around, since AddressSanitizer contains quite a load of state

Oct 4 2018, 3:07 AM · Restricted Project
philip.pfaffe added a comment to D52814: [PassManager/Sanitizer] Enable usage of ported AddressSanitizer passes with -fsanitize=address .

Is this the right place in the pipeline to put the passes? The legacy PM inserts the asan passes at EP_OptimizerLast, why not do the same thing?

Oct 4 2018, 3:05 AM · Restricted Project, Restricted Project

Oct 1 2018

philip.pfaffe added a comment to D52739: [PassManager/Sanitizer] Port of AddresSanitizer pass from legacy to new PassManager.

Thank you for moving this along!

Oct 1 2018, 12:53 PM · Restricted Project

Sep 27 2018

philip.pfaffe accepted D51276: [New PM][PassTiming] implement -time-passes for the new pass manager.

LGTM! Some final feedback by @chandlerc would be good though before landing :)

Sep 27 2018, 2:50 AM

Sep 26 2018

philip.pfaffe accepted D52356: [PassTiming] cleaning up legacy PassTimingInfo interface. NFCI..

Okay, all in all this looks alright, and making a single cleanup change seems less verbose than reverting rL340872 first. Please make very clear in this commit message that this is a partial revert and why.

Sep 26 2018, 2:03 AM
philip.pfaffe added inline comments to D51276: [New PM][PassTiming] implement -time-passes for the new pass manager.
Sep 26 2018, 1:57 AM

Sep 25 2018

philip.pfaffe added a reviewer for D51276: [New PM][PassTiming] implement -time-passes for the new pass manager: philip.pfaffe.
Sep 25 2018, 3:08 AM
philip.pfaffe added a comment to D51276: [New PM][PassTiming] implement -time-passes for the new pass manager.

I like how simple this is becoming!

Sep 25 2018, 3:08 AM

Sep 24 2018

philip.pfaffe added a comment to D52356: [PassTiming] cleaning up legacy PassTimingInfo interface. NFCI..

Is that remaining change still useful? Does it make sense to revert instead?

Sep 24 2018, 7:20 AM
philip.pfaffe added a comment to D52356: [PassTiming] cleaning up legacy PassTimingInfo interface. NFCI..

is this in some sense a revert of rL340872? Which parts of that change remain?

Sep 24 2018, 7:19 AM
philip.pfaffe added a comment to D50923: [New PM][PassInstrumentation] IR printing support for New Pass Manager.

LGTM, but I wonder why the PIC object is set up and used only in this change. Did we miss that in the change introducing it?

Sep 24 2018, 7:19 AM

Sep 21 2018

philip.pfaffe added a comment to D50923: [New PM][PassInstrumentation] IR printing support for New Pass Manager.

See my comment to D52329. Analysis isn't the right place for this implementation. This should be part of the Passes library, and even live directly in the StandardInstrumentations implementation.

Sep 21 2018, 1:27 AM
philip.pfaffe added a comment to D51276: [New PM][PassTiming] implement -time-passes for the new pass manager.

Some inline comments.

Sep 21 2018, 1:23 AM
philip.pfaffe added a comment to D52329: [New PM] adding helper that manages standard instrumentations.

This looks nice! At this point, I think it makes sense to just move the entire IR Printing implementation here. I don't even think it needs to be mentioned in the header. It doesn't have any other clients, and Analysis is definitely the wrong home.

Sep 21 2018, 1:02 AM

Sep 19 2018

philip.pfaffe added a comment to D51632: [New PM][PassInstrumentation] enhancing PassInstrumentation with PassManager tracking.

I don't fully understand the rationale behind this. How is this different compared to a before/after instrumentation matching the PassManagers?

Sep 19 2018, 2:55 AM
philip.pfaffe accepted D47858: [New PM] Introducing PassInstrumentation framework.

So I'd still prefer a generic free getAnalysisResult, plus specializations for the non-simple cases, e.g. Loop and CGSCC. That way there's less surprises should there ever be a 'weird' AnalysisManager out there using a different argument mapping. Happy to do this in a followup though!

Sep 19 2018, 12:42 AM

Sep 18 2018

philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 18 2018, 2:37 PM

Sep 15 2018

philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 15 2018, 8:46 AM

Sep 14 2018

philip.pfaffe added a comment to D50923: [New PM][PassInstrumentation] IR printing support for New Pass Manager.

I want all the debugging options to work the same manner whether it is opt or any other tool/way to run the pipeline
(say, in our JIT compiler we do sometimes use -print options). And I want them to work the same way both in legacy and new pass manager.
That means the main controlling interface should better be joined (and thats where ShouldPrint come into play).

Note that I'm not saying we should abandon the -print command line options, just that the ShouldPrint functions are the entirely wrong place to access them. This indirection is simply not necessary anymore.

Sep 14 2018, 3:25 PM
philip.pfaffe added a comment to D50923: [New PM][PassInstrumentation] IR printing support for New Pass Manager.

This implementation is modeled unnecessarily close to the legacy behavior. opt should just manually add the printer instrumentation if a print option is given. In particular., this shouldn't use the ShouldPrint* functions. This way there's no need to involve the PassBuilder API, and you also don't pay for the instrumentation if you don't want to print.

Sep 14 2018, 2:32 PM
philip.pfaffe accepted D51275: [New PM][PassInstrumentation] Adding PassInstrumentation to the AnalysisManager runs.

This looks entirely straightforward.

Sep 14 2018, 1:54 PM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

At this point I'm bikeshedding: Should getAnalysisResultgo into the Internal header?

Sep 14 2018, 8:53 AM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

This is looking great. Apart from two things that aren't needed anymore, the last point of discussion is getPassInstrumentation. PassInstrumentationAnalysis shouldn't be a special citizen. What about making this a free function instead? In fact, why not make this a generic helper e.g. in the detail namespace to query _any_ analysis result from a template pass?

Sep 14 2018, 6:03 AM

Sep 13 2018

philip.pfaffe added a comment to D51973: [New PM] adding unit tests for PassInstrumentation.

This looks good! I dislike the AnyNumber() expecations you highlighted above, but I see that it's unavoidable without either repeating a lot of the test logic again, or without waiting for something like D39678 to happen.

Sep 13 2018, 4:37 AM
philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 13 2018, 4:33 AM

Sep 6 2018

philip.pfaffe added inline comments to D51748: cmake: Remove add_llvm_loadable_module().
Sep 6 2018, 3:03 PM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

I like how simple this is now!

Sep 6 2018, 10:30 AM

Sep 5 2018

philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

Here's what I think the ownership layering should look like:

Sep 5 2018, 3:07 AM

Sep 3 2018

philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 3 2018, 2:25 PM
philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 3 2018, 1:41 PM
philip.pfaffe added inline comments to D47858: [New PM] Introducing PassInstrumentation framework.
Sep 3 2018, 12:45 PM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

I meant both your arguments towards passing the real IRUnit and an opaque pass identifier.

Sep 3 2018, 12:37 PM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

Okay, that sounds reasonable.

Sep 3 2018, 8:39 AM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

Reconsidering passing the actual IRUnit to the callbacks, I still think that's not a good idea. Downstream users _will_ eventually use this to hook into the pipeline and mess with the IR somehow. So instead this should be opaque to clients.

Sep 3 2018, 4:06 AM
philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

IMO passing void* as an opaque ID along with the name is fine. Passing the PassConcept by reference would degrade layering, since it lives in IR, not in Passes like the rest of this. could be a viable alternative, the Passes library depends on IR anyways.

Sep 3 2018, 3:41 AM
philip.pfaffe added a comment to D51276: [New PM][PassTiming] implement -time-passes for the new pass manager.

Instead of using a global timer registry, this should get a per-compilation registry from the PassExecutionCounter.

Sep 3 2018, 3:22 AM

Aug 29 2018

philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

Back from vacation, and had time for a closer look.

Aug 29 2018, 8:30 AM

Aug 21 2018

philip.pfaffe added a comment to D47858: [New PM] Introducing PassInstrumentation framework.

Thanks for moving this forward!

Aug 21 2018, 4:26 AM

Aug 16 2018

philip.pfaffe added a comment to D50668: unittests: Don't install TestPlugin.so.

We probably should just disable the unittest on windows, in particular if(NOT LLVM_ENABLE_PLUGINS AND NOT (ARG_PLUGIN_TOOL AND LLVM_EXPORT_SYMBOLS_FOR_PLUGINS)).

Aug 16 2018, 11:07 AM

Aug 15 2018

philip.pfaffe accepted D50668: unittests: Don't install TestPlugin.so.

Cool, LGTM!

Aug 15 2018, 2:42 AM

Aug 14 2018

philip.pfaffe added a comment to D50668: unittests: Don't install TestPlugin.so.

This makes complete sense to me, but I'm wondering whether add_llvm_loadable_module is the right macro to use here in the first place. All it does is call add_llvm_library with a MODULE argument, and set up the install.

Aug 14 2018, 2:17 AM

Aug 9 2018

philip.pfaffe added a comment to D49486: [cfe][CMake] Export the clang resource directory.

I had not, but it should work just as well!

Aug 9 2018, 10:03 AM
philip.pfaffe added a comment to D49486: [cfe][CMake] Export the clang resource directory.

Ping.

Aug 9 2018, 8:18 AM

Aug 2 2018

philip.pfaffe added a comment to D49024: [Polly] [WIP] Introduce ShapeInfo into polly for sizes and strides..

On top of my generic concern regarding the unclean implementation of the ShapeInfo itself, I left you a bunch of inline comments, mostly concerning style.

Aug 2 2018, 6:48 AM

Jul 27 2018

philip.pfaffe added a comment to D49872: [Polly][ScopDetect] Add option -polly-allow-nonaffine-read and enable by default..

Does this still allow disproving data dependences?

Jul 27 2018, 2:00 AM · Restricted Project

Jul 26 2018

philip.pfaffe added a comment to D49843: [CMake] Followup for r337366: Only export LLVM_LINK_LLVM_DYLIB it it's set to ON.

Since the 8.0 branch is around the corner I'd really like feedback from @beanz whether this makes sense or not.

Jul 26 2018, 4:06 AM
philip.pfaffe created D49843: [CMake] Followup for r337366: Only export LLVM_LINK_LLVM_DYLIB it it's set to ON.
Jul 26 2018, 4:05 AM

Jul 25 2018

philip.pfaffe added a comment to D49609: [isl] Typesafe user pointers.

The link is 404, but I assume it boils down to the same thing as either std::any or llvm::Any. It's not hard to reroll the implementation in isl, but then we have three.

Jul 25 2018, 2:58 AM
philip.pfaffe added a comment to D49609: [isl] Typesafe user pointers.

As we discussed offline, std::any doesn't really help polly, because it's a c++17 feature. Instead, what about making the generator itself extensible? Allow users to hook into the generation process and modify whatever happens. Then we can just emit llvm::Any privately. Additionally, this can settle the exceptions/no-exceptions debate.

Jul 25 2018, 1:34 AM

Jul 23 2018

philip.pfaffe updated the diff for D49609: [isl] Typesafe user pointers.

Fixery to appease the regression tests:

  • Back out of cool new api in PPCGCodeGeneration.
  • Don't delete Any through void*
  • Fix a get_user<const>
Jul 23 2018, 6:15 AM
philip.pfaffe updated the diff for D49609: [isl] Typesafe user pointers.

Address @bollu's comments

Jul 23 2018, 4:31 AM
philip.pfaffe updated the diff for D49609: [isl] Typesafe user pointers.

Handle nullptr users correctly

Jul 23 2018, 4:27 AM

Jul 20 2018

philip.pfaffe updated the diff for D49609: [isl] Typesafe user pointers.

Fail harder if the wrong type is given.

Jul 20 2018, 12:10 PM
philip.pfaffe updated the diff for D49609: [isl] Typesafe user pointers.

Missed a couple of c-api uses

Jul 20 2018, 11:15 AM
philip.pfaffe created D49609: [isl] Typesafe user pointers.
Jul 20 2018, 10:44 AM
philip.pfaffe added a comment to D49021: [Polly][isl] Simplify iterator implementation by building on top of list accessors.

Ping.

Jul 20 2018, 4:21 AM
philip.pfaffe added a comment to D29488: [DA] Fix for PR31848: Treat AddRec subscripts containing extra loops as NonLinear.

Realized this is still pending. Added some reviewers.

Jul 20 2018, 3:49 AM
philip.pfaffe added reviewers for D29488: [DA] Fix for PR31848: Treat AddRec subscripts containing extra loops as NonLinear: dmgreen, fhahn, hfinkel.
Jul 20 2018, 3:49 AM

Jul 18 2018

philip.pfaffe abandoned D49478: [cfe][CMake] Export the clang resource directory.

Abandoning in favor D49486, which subscribed the right list :)

Jul 18 2018, 7:45 AM
philip.pfaffe created D49486: [cfe][CMake] Export the clang resource directory.
Jul 18 2018, 7:44 AM
philip.pfaffe created D49478: [cfe][CMake] Export the clang resource directory.
Jul 18 2018, 5:35 AM

Jul 17 2018

philip.pfaffe accepted D49022: [Polly-ACC] disallow managed memory code generation for OpenCL.

Thanks! LGTM.

Jul 17 2018, 6:40 AM
philip.pfaffe added a comment to D49022: [Polly-ACC] disallow managed memory code generation for OpenCL.

Thank, only nits left!

Jul 17 2018, 5:51 AM

Jul 13 2018

philip.pfaffe added a comment to D49019: [Polly][isl] Add neutrally-named accessors to isl list elements and sizes.

Should I commit this change, or wait until the generator is updated and recreate it using that?

Jul 13 2018, 6:05 AM

Jul 11 2018

philip.pfaffe created D49193: [CMake] Export the LLVM_LINK_LLVM_DYLIB setting.
Jul 11 2018, 8:56 AM

Jul 10 2018

philip.pfaffe added a comment to D49019: [Polly][isl] Add neutrally-named accessors to isl list elements and sizes.

Is the generator in the repo?

Jul 10 2018, 7:32 AM
philip.pfaffe added a comment to D49022: [Polly-ACC] disallow managed memory code generation for OpenCL.

I'd prefer putting it into PPCGCodeGeneration.cpp/PPCGCodeGeneration.h.

Jul 10 2018, 7:10 AM
philip.pfaffe added a comment to D49130: Fix OpenCL Work-Item function arguments in Polly.

What's the relationship between this and D48774?

Jul 10 2018, 7:08 AM · Restricted Project

Jul 6 2018

philip.pfaffe added a comment to D49019: [Polly][isl] Add neutrally-named accessors to isl list elements and sizes.

Where's the code for the generator?

Jul 6 2018, 9:27 AM
philip.pfaffe added a comment to D49024: [Polly] [WIP] Introduce ShapeInfo into polly for sizes and strides..

I raised this concern already on Siddharth's version, but if this will succeed that I'll need to repeat it hear: ShapeInfo is pretty spaghetti, this should be fundamentally redesigned.

Jul 6 2018, 9:20 AM
philip.pfaffe added a comment to D49022: [Polly-ACC] disallow managed memory code generation for OpenCL.

I don't like that this messes with global state. This destroys local reasoning and makes refactoring unnecessarily harder in the future.

Jul 6 2018, 9:15 AM
philip.pfaffe created D49021: [Polly][isl] Simplify iterator implementation by building on top of list accessors.
Jul 6 2018, 5:41 AM