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2020-01-27Support zero size types in StackSafetyAnalysis.Evgenii Stepanov1-0/+4
Reviewers: vitalybuka Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D73395
2020-01-27Fix StackSafetyAnalysis crash with scalable vector types.Evgenii Stepanov1-7/+21
Summary: Treat scalable allocas as if they have storage size of 0, and scalable-typed memory accesses as if their range is unlimited. This is not a proper support of scalable vector types in the analysis - we can do better, but not today. Reviewers: vitalybuka Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D73394
2019-11-14Add missing includes needed to prune LLVMContext.h include, NFCReid Kleckner1-0/+1
These are a pre-requisite to removing #include "llvm/Support/Options.h" from LLVMContext.h: https://reviews.llvm.org/D70280
2019-11-13Sink all InitializePasses.h includesReid Kleckner1-0/+1
This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
2019-08-22IR. Change strip* family of functions to not look through aliases.Peter Collingbourne1-2/+2
I noticed another instance of the issue where references to aliases were being replaced with aliasees, this time in InstCombine. In the instance that I saw it turned out to be only a QoI issue (a symbol ended up being missing from the symbol table due to the last reference to the alias being removed, preventing HWASAN from symbolizing a global reference), but it could easily have manifested as incorrect behaviour. Since this is the third such issue encountered (previously: D65118, D65314) it seems to be time to address this common error/QoI issue once and for all and make the strip* family of functions not look through aliases. Includes a test for the specific issue that I saw, but no doubt there are other similar bugs fixed here. As with D65118 this has been tested to make sure that the optimization isn't load bearing. I built Clang, Chromium for Linux, Android and Windows as well as the test-suite and there were no size regressions. Differential Revision: https://reviews.llvm.org/D66606 llvm-svn: 369697
2019-03-01Hide two unused debugging methods, NFCI.Jonas Hahnfeld1-0/+4
GCC correctly moans that PlainCFGBuilder::isExternalDef(llvm::Value*) and StackSafetyDataFlowAnalysis::verifyFixedPoint() are defined but not used in Release builds. Hide them behind 'ifndef NDEBUG'. llvm-svn: 355205
2019-01-19Update the file headers across all of the LLVM projects in the monorepoChandler Carruth1-4/+3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
2018-12-21[IR] Add Instruction::isLifetimeStartOrEnd, NFCVedant Kumar1-5/+2
Instruction::isLifetimeStartOrEnd() checks whether an Instruction is an llvm.lifetime.start or an llvm.lifetime.end intrinsic. This was suggested as a cleanup in D55967. Differential Revision: https://reviews.llvm.org/D56019 llvm-svn: 349964
2018-11-27[stack-safety] Update commentVitaly Buka1-1/+1
llvm-svn: 347626
2018-11-27[stack-safety] Fix and uncomment assertVitaly Buka1-3/+2
llvm-svn: 347625
2018-11-27[stack-safety] Fix build on gcc 5.4Vitaly Buka1-1/+1
llvm-svn: 347624
2018-11-26Fix debug build breakJF Bastien1-2/+3
Comment out an assertion from D54543 which failed with error: no member named 'Range' in '(anonymous namespace)::PassAsArgInfo'. llvm-svn: 347616
2018-11-26[stack-safety] Inter-Procedural Analysis implementationVitaly Buka1-4/+203
Summary: IPA is implemented as module pass which produce map from Function or Alias to StackSafetyInfo for a single function. From prototype by Evgenii Stepanov and Vlad Tsyrklevich. Reviewers: eugenis, vlad.tsyrklevich, pcc, glider Subscribers: hiraditya, mgrang, llvm-commits Differential Revision: https://reviews.llvm.org/D54543 llvm-svn: 347611
2018-11-26[stack-safety] Empty local passes for Stack Safety Global AnalysisVitaly Buka1-0/+45
Reviewers: eugenis, vlad.tsyrklevich Subscribers: hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D54541 llvm-svn: 347610
2018-11-26[stack-safety] Local analysis implementationVitaly Buka1-5/+377
Summary: Analysis produces StackSafetyInfo which contains information with how allocas and parameters were used in functions. From prototype by Evgenii Stepanov and Vlad Tsyrklevich. Reviewers: eugenis, vlad.tsyrklevich, pcc, glider Subscribers: hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D54504 llvm-svn: 347603
2018-11-26[stack-safety] Empty local passes for Stack Safety Local AnalysisVitaly Buka1-0/+60
Reviewers: eugenis, vlad.tsyrklevich Subscribers: mgorny, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D54502 llvm-svn: 347602
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