[all-commits] [llvm/llvm-project] f52f8e: [Profile] Allow online merging with debug info cor...

[Zequan Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f52f8e817ea36e003e8f09672de48c3c460093f4
      https://github.com/llvm/llvm-project/commit/f52f8e817ea36e003e8f09672de48c3c460093f4
  Author: Zequan Wu <zequanwu at google.com>
  Date:   2023-08-28 (Mon, 28 Aug 2023)

  Changed paths:
    M clang/lib/CodeGen/BackendUtil.cpp
    M compiler-rt/lib/profile/InstrProfilingMerge.c
    M compiler-rt/test/profile/Darwin/instrprof-debug-info-correlate.c
    M compiler-rt/test/profile/Linux/instrprof-debug-info-correlate.c
    A compiler-rt/test/profile/instrprof-merge-empty-data.test
    M compiler-rt/test/profile/instrprof-merge-error.c

  Log Message:
  -----------
  [Profile] Allow online merging with debug info correlation.

When using debug info correlation, value profiling needs to be switched off.
So, we are only merging counter sections. In that case the existance of data
section is just used to provide an extra check in case of corrupted profile.

This patch performs counter merging by iterating the counter section by counter
size and add them together.

Reviewed By: ellis, MaskRay

Differential Revision: https://reviews.llvm.org/D157632