[PATCH] D99123: [SampleFDO] Flow Sensitive Sample FDO (FSAFDO)

[Rong Xu via Phabricator via llvm-commits]

xur created this revision.
xur added reviewers: davidxl, wmi, hoy, snehasish.
Herald added subscribers: dexonsmith, wenlei, pengfei, steven_wu, zzheng, hiraditya, mgorny.
xur requested review of this revision.
Herald added a project: LLVM.

This patch implements Flow Sensitive Sample FDO (FSAFDO). It has the following
changes:
(1) disable current discriminator coding scheme.
(2) new hierarchical discriminator for FSAFDO
(3) FSAFDO profile loader.

For this patch, "-enable-fs-discriminator=true" turns on the new functionality.
"-enable-fs-discriminator=false" (the default) keeps current Sample FDO behavior.

This patch is not intended for check-in. I post it  mainly to get the advises on to break
into smaller patches. Also because of this, I did not include the test cases.


https://reviews.llvm.org/D99123

Files:
  llvm/include/llvm/CodeGen/FlowSensitiveSampleProfile.h
  llvm/include/llvm/CodeGen/MachineDominators.h
  llvm/include/llvm/CodeGen/MachineOptimizationRemarkEmitter.h
  llvm/include/llvm/CodeGen/Passes.h
  llvm/include/llvm/IR/DebugInfoMetadata.h
  llvm/include/llvm/InitializePasses.h
  llvm/include/llvm/LTO/Config.h
  llvm/include/llvm/ProfileData/SampleProfReader.h
  llvm/include/llvm/Support/FSAFDODiscriminator.h
  llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h
  llvm/lib/CodeGen/CMakeLists.txt
  llvm/lib/CodeGen/FlowSensitiveSampleProfile.cpp
  llvm/lib/CodeGen/TargetPassConfig.cpp
  llvm/lib/LTO/LTOBackend.cpp
  llvm/lib/Passes/PassBuilder.cpp
  llvm/lib/ProfileData/SampleProf.cpp
  llvm/lib/ProfileData/SampleProfReader.cpp
  llvm/lib/Target/X86/X86InsertPrefetch.cpp
  llvm/lib/Transforms/IPO/SampleProfile.cpp
  llvm/lib/Transforms/Utils/LoopUnroll.cpp
  llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/tools/llvm-profdata/llvm-profdata.cpp
  llvm/unittests/ProfileData/SampleProfTest.cpp

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