[PATCH] D157632: [Profile] Allow online merging with debug info correlation.

[Zequan Wu via Phabricator via cfe-commits]

zequanwu created this revision.
zequanwu added reviewers: ellis, MaskRay, davidxl.
Herald added subscribers: Enna1, ormris.
Herald added a project: All.
zequanwu requested review of this revision.
Herald added projects: clang, Sanitizers.
Herald added subscribers: Sanitizers, cfe-commits.

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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157632

Files:
  clang/lib/CodeGen/BackendUtil.cpp
  compiler-rt/lib/profile/InstrProfilingMerge.c
  compiler-rt/test/profile/Darwin/instrprof-debug-info-correlate.c
  compiler-rt/test/profile/Linux/instrprof-debug-info-correlate.c

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