[all-commits] [llvm/llvm-project] db7e9e: [TypeProf][InstrPGO] Introduce raw and instr profi...

[Mingming Liu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: db7e9e68411de074dee78c92657e983da4b89500
      https://github.com/llvm/llvm-project/commit/db7e9e68411de074dee78c92657e983da4b89500
  Author: Mingming Liu <mingmingl at google.com>
  Date:   2024-02-21 (Wed, 21 Feb 2024)

  Changed paths:
    M compiler-rt/include/profile/InstrProfData.inc
    M compiler-rt/lib/profile/InstrProfiling.h
    M compiler-rt/lib/profile/InstrProfilingBuffer.c
    M compiler-rt/lib/profile/InstrProfilingInternal.h
    M compiler-rt/lib/profile/InstrProfilingMerge.c
    M compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
    M compiler-rt/lib/profile/InstrProfilingWriter.c
    M compiler-rt/test/profile/instrprof-write-buffer-internal.c
    M llvm/include/llvm/ProfileData/InstrProf.h
    M llvm/include/llvm/ProfileData/InstrProfData.inc
    M llvm/include/llvm/ProfileData/InstrProfReader.h
    M llvm/lib/ProfileData/InstrProf.cpp
    M llvm/lib/ProfileData/InstrProfReader.cpp
    M llvm/lib/ProfileData/InstrProfWriter.cpp
    M llvm/test/Instrumentation/InstrProfiling/coverage.ll
    M llvm/test/Transforms/PGOProfile/Inputs/thinlto_indirect_call_promotion.profraw
    M llvm/test/Transforms/PGOProfile/comdat_internal.ll
    M llvm/test/tools/llvm-profdata/Inputs/c-general.profraw
    M llvm/test/tools/llvm-profdata/Inputs/compressed.profraw
    A llvm/test/tools/llvm-profdata/Inputs/thinlto_indirect_call_promotion.profraw
    M llvm/test/tools/llvm-profdata/binary-ids-padding.test
    M llvm/test/tools/llvm-profdata/large-binary-id-size.test
    M llvm/test/tools/llvm-profdata/malformed-not-space-for-another-header.test
    M llvm/test/tools/llvm-profdata/malformed-num-counters-zero.test
    M llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
    M llvm/test/tools/llvm-profdata/misaligned-binary-ids-size.test
    M llvm/test/tools/llvm-profdata/mismatched-raw-profile-header.test
    M llvm/test/tools/llvm-profdata/raw-32-bits-be.test
    M llvm/test/tools/llvm-profdata/raw-32-bits-le.test
    M llvm/test/tools/llvm-profdata/raw-64-bits-be.test
    M llvm/test/tools/llvm-profdata/raw-64-bits-le.test
    M llvm/test/tools/llvm-profdata/raw-two-profiles.test

  Log Message:
  -----------
  [TypeProf][InstrPGO] Introduce raw and instr profile format change for type profiling. (#81691)

* Raw profile format
- Header: records the byte size of compressed vtable names, and the
number of profiled vtable entries (call it `VTableProfData`). Header
also records padded bytes of each section.
- Payload: adds a section for compressed vtable names, and a section to
store `VTableProfData`. Both sections are padded so the size is a
multiple of 8.
* Indexed profile format
  - Header: records the byte offset of compressed vtable names.
- Payload: adds a section to store compressed vtable names. This section
is used by `llvm-profdata` to show the list of vtables profiled for an
instrumented site.
  
[The originally reviewed
patch](https://github.com/llvm/llvm-project/pull/66825) will have
profile reader/write change and llvm-profdata change.
- To ensure this PR has all the necessary profile format change along
with profile version bump, created a copy of the originally reviewed
patch in https://github.com/llvm/llvm-project/pull/80761. The copy
doesn't have profile format change, but it has the set of tests which
covers type profile generation, profile read and profile merge. Tests
pass there.
  
rfc in
https://discourse.llvm.org/t/rfc-dynamic-type-profiling-and-optimizations-in-llvm/74600

---------

Co-authored-by: modiking <modiking213 at gmail.com>



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