[PATCH] D120103: Reland "[memprof] Extend the index prof format to include memory profiles."

[Snehasish Kumar via Phabricator via llvm-commits]

snehasish created this revision.
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Closed by commit rG0a4184909a8c: Reland "[memprof] Extend the index prof format to include memory profiles." (authored by snehasish).
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Changed prior to commit:
  https://reviews.llvm.org/D120103?vs=409822&id=409857#toc

This reverts commit 19bdf44d850884a13a8708ccf1260fb7f4ef4eb3 <https://reviews.llvm.org/rG19bdf44d850884a13a8708ccf1260fb7f4ef4eb3>.

This patch adds support for optional memory profile information to be
included with and indexed profile. The indexed profile header adds a new
field which points to the offset of the memory profile section (if
present) in the indexed profile. For users who do not utilize this
feature the only overhead is a 64-bit offset in the header.

The memory profile section contains (1) profile metadata describing the
information recorded for each entry (2) an on-disk hashtable containing
the profile records indexed via llvm::md5(function_name). We chose to
introduce a separate hash table instead of the existing one since the
indexing for the instrumented fdo hash table is based on a CFG hash
which itself is perturbed by memprof instrumentation.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120103

Files:
  compiler-rt/include/profile/InstrProfData.inc
  llvm/include/llvm/ProfileData/InstrProf.h
  llvm/include/llvm/ProfileData/InstrProfData.inc
  llvm/include/llvm/ProfileData/InstrProfReader.h
  llvm/include/llvm/ProfileData/InstrProfWriter.h
  llvm/include/llvm/ProfileData/MemProf.h
  llvm/include/llvm/ProfileData/MemProfData.inc
  llvm/include/llvm/ProfileData/RawMemProfReader.h
  llvm/lib/ProfileData/CMakeLists.txt
  llvm/lib/ProfileData/InstrProf.cpp
  llvm/lib/ProfileData/InstrProfReader.cpp
  llvm/lib/ProfileData/InstrProfWriter.cpp
  llvm/lib/ProfileData/MemProf.cpp
  llvm/lib/ProfileData/RawMemProfReader.cpp
  llvm/test/tools/llvm-profdata/Inputs/basic.profraw
  llvm/test/tools/llvm-profdata/memprof-merge.test
  llvm/tools/llvm-profdata/llvm-profdata.cpp
  llvm/unittests/ProfileData/InstrProfTest.cpp
  llvm/unittests/ProfileData/MemProfTest.cpp

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