[PATCH] D66766: [SampleFDO] Add symbol whitelist section to discriminate function being cold versus function being newly added

[Wei Mi via Phabricator via llvm-commits]

wmi created this revision.
wmi added reviewers: davidxl, mtrofin.
Herald added a subscriber: mgrang.
Herald added a project: LLVM.

This is the second half of https://reviews.llvm.org/D66374.

Symbol whitelist is the collection of function symbols showing up in the binary which generates the current profile. It is used to discriminate function being cold versus function being newly added. Symbol whitelist is only added for profile with ExtBinary format.

During profile use compilation, when profile-sample-accurate is enabled, a function without profile will be regarded as cold only when it is contained in that list.


Repository:
  rL LLVM

https://reviews.llvm.org/D66766

Files:
  include/llvm/ProfileData/SampleProf.h
  include/llvm/ProfileData/SampleProfReader.h
  include/llvm/ProfileData/SampleProfWriter.h
  lib/ProfileData/SampleProf.cpp
  lib/ProfileData/SampleProfReader.cpp
  lib/ProfileData/SampleProfWriter.cpp
  lib/Transforms/IPO/SampleProfile.cpp
  test/Transforms/SampleProfile/Inputs/inline.extbinary.afdo
  test/Transforms/SampleProfile/symbol-white-list.ll
  unittests/ProfileData/SampleProfTest.cpp

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