[all-commits] [llvm/llvm-project] 75e9d1: [llvm-profdata] Enabled functionality to write spl...

[William Junda Huang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 75e9d191f52b047ea839f75ab2a7a7d9f8c6becd
      https://github.com/llvm/llvm-project/commit/75e9d191f52b047ea839f75ab2a7a7d9f8c6becd
  Author: William Junda Huang <williamjhuang at google.com>
  Date:   2024-08-28 (Wed, 28 Aug 2024)

  Changed paths:
    M llvm/docs/CommandGuide/llvm-profdata.rst
    M llvm/include/llvm/ProfileData/SampleProfReader.h
    M llvm/include/llvm/ProfileData/SampleProfWriter.h
    M llvm/lib/ProfileData/SampleProfReader.cpp
    M llvm/lib/ProfileData/SampleProfWriter.cpp
    A llvm/test/tools/llvm-profdata/Inputs/split-layout.profdata
    A llvm/test/tools/llvm-profdata/sample-split-layout.test
    M llvm/tools/llvm-profdata/llvm-profdata.cpp

  Log Message:
  -----------
  [llvm-profdata] Enabled functionality to write split-layout profile (#101795)

Using the flag `-split_layout` in llvm-profdata merge, the output
profile can write profiles with and without inlined function into two
different extbinary sections (and their FuncOffsetTable too). The
section without inlined functions are marked with `SecFlagFlat` and is
skipped by ThinLTO because it provides no useful info.

The split layout feature was already implemented in SampleProfWriter but
previously there is no way to use it from llvm-profdata.



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