[PATCH] D128675: [CSSPGO] Add a SecMetadataOffsetTable to extbinary profile

[Hongtao Yu via Phabricator via llvm-commits]

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I've been seeing compile time slowdown due to the loading of function metadata section with using CS nested profile for CSSPGO, where the metadata section is big due to its nested structure. I'm introducing SecMetadataOffsetTable to speed up the on-demand loading of the metadata section, similarly with the existing SecFunctionOffsetTable. This neables a 6% compilation speed up, based on one of our internal large benchmarks.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128675

Files:
  llvm/include/llvm/ProfileData/SampleProf.h
  llvm/include/llvm/ProfileData/SampleProfReader.h
  llvm/include/llvm/ProfileData/SampleProfWriter.h
  llvm/lib/ProfileData/SampleProfReader.cpp
  llvm/lib/ProfileData/SampleProfWriter.cpp
  llvm/test/tools/llvm-profgen/cs-preinline.test

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