[all-commits] [llvm/llvm-project] 4c8ec8: [memprof] Reduce schema for Version2 (#89876)

[Kazu Hirata via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4c8ec8f8bc3fb4dda4fd36c3b2ad745bd3451970
      https://github.com/llvm/llvm-project/commit/4c8ec8f8bc3fb4dda4fd36c3b2ad745bd3451970
  Author: Kazu Hirata <kazu at google.com>
  Date:   2024-04-24 (Wed, 24 Apr 2024)

  Changed paths:
    M llvm/include/llvm/ProfileData/InstrProfWriter.h
    M llvm/include/llvm/ProfileData/MemProf.h
    M llvm/lib/ProfileData/InstrProfWriter.cpp
    M llvm/test/tools/llvm-profdata/memprof-merge-v0.test
    M llvm/tools/llvm-profdata/llvm-profdata.cpp
    M llvm/unittests/ProfileData/InstrProfTest.cpp

  Log Message:
  -----------
  [memprof] Reduce schema for Version2 (#89876)

Curently, the compiler only uses several fields of MemoryInfoBlock.
Serializing all fields into the indexed MemProf file simply wastes
storage.

This patch limits the schema down to four fields for Version2 by
default.  It retains the old behavior of serializing all fields via:

  llvm-profdata merge --memprof-version=2 --memprof-full-schema

This patch reduces the size of the indexed MemProf profile I have by
40% (1.6GB down to 1.0GB).



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