[all-commits] [llvm/llvm-project] 5fdaaf: [SampleFDO] Flow Sensitive Sample FDO (FSAFDO) pro...

[xur-llvm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5fdaaf7fd8f35ac9c9de50a45b09e29c7b0d48c4
      https://github.com/llvm/llvm-project/commit/5fdaaf7fd8f35ac9c9de50a45b09e29c7b0d48c4
  Author: Rong Xu <xur at google.com>
  Date:   2021-08-18 (Wed, 18 Aug 2021)

  Changed paths:
    M clang/lib/CodeGen/BackendUtil.cpp
    A llvm/include/llvm/CodeGen/MIRSampleProfile.h
    M llvm/include/llvm/CodeGen/MachineDominators.h
    M llvm/include/llvm/CodeGen/MachineOptimizationRemarkEmitter.h
    M llvm/include/llvm/CodeGen/Passes.h
    M llvm/include/llvm/IR/DebugInfoMetadata.h
    M llvm/include/llvm/InitializePasses.h
    M llvm/include/llvm/Passes/PassBuilder.h
    A llvm/include/llvm/Support/PGOOptions.h
    M llvm/include/llvm/Target/TargetMachine.h
    M llvm/include/llvm/Transforms/Utils/SampleProfileLoaderBaseImpl.h
    M llvm/lib/CodeGen/CMakeLists.txt
    A llvm/lib/CodeGen/MIRSampleProfile.cpp
    M llvm/lib/CodeGen/TargetPassConfig.cpp
    M llvm/lib/LTO/LTOBackend.cpp
    M llvm/lib/Transforms/IPO/SampleProfile.cpp
    A llvm/test/CodeGen/X86/Inputs/fsloader.afdo
    M llvm/test/CodeGen/X86/fsafdo_test2.ll
    M llvm/tools/opt/NewPMDriver.cpp

  Log Message:
  -----------
  [SampleFDO] Flow Sensitive Sample FDO (FSAFDO) profile loader

This patch implements Flow Sensitive Sample FDO (FSAFDO) profile
loader. We have two profile loaders for FS profile,
one before RegAlloc and one before BlockPlacement.

To enable it, when -fprofile-sample-use=<profile> is specified,
add "-enable-fs-discriminator=true \
     -disable-ra-fsprofile-loader=false \
     -disable-layout-fsprofile-loader=false"
to turn on the FS profile loaders.

Differential Revision: https://reviews.llvm.org/D107878