[PATCH] D99994: [CodeView] Add CodeView support for PGO debug information

[Michael Holman via Phabricator via cfe-commits]

Holman created this revision.
Herald added subscribers: dexonsmith, wenlei, hiraditya.
Holman requested review of this revision.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

This change adds debug information about whether PGO is being used or not.

Microsoft performance tooling (e.g. xperf, WPA) uses this information to show whether functions are optimized with PGO or not, as well as whether PGO information is invalid.

This information is useful for validating whether training scenarios are providing good coverage of real world scenarios, showing if profile data is out of date, etc.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99994

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  llvm/include/llvm/IR/DIBuilder.h
  llvm/include/llvm/IR/DebugInfoMetadata.h
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/Bitcode/Reader/MetadataLoader.cpp
  llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
  llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
  llvm/lib/IR/DIBuilder.cpp
  llvm/lib/IR/DebugInfo.cpp
  llvm/lib/IR/DebugInfoMetadata.cpp
  llvm/unittests/IR/MetadataTest.cpp

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