[all-commits] [llvm/llvm-project] 2407c1: [AIX][PGO] Enable linux style PGO on AIX

[Wael Yehia via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2407c13aa4a42f3a3438ae2d03fa38df0a5fd30b
      https://github.com/llvm/llvm-project/commit/2407c13aa4a42f3a3438ae2d03fa38df0a5fd30b
  Author: Wael Yehia <wyehia at ca.ibm.com>
  Date:   2022-05-05 (Thu, 05 May 2022)

  Changed paths:
    M clang/lib/Driver/ToolChains/AIX.cpp
    M clang/test/Driver/aix-ld.c
    M compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
    M compiler-rt/lib/profile/InstrProfilingPlatformOther.c
    M llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
    M llvm/test/Instrumentation/InstrProfiling/platform.ll
    M llvm/test/Instrumentation/InstrProfiling/profiling.ll

  Log Message:
  -----------
  [AIX][PGO] Enable linux style PGO on AIX

This patch switches the PGO implementation on AIX from using the runtime
registration-based section tracking to the __start_SECNAME/__stop_SECNAME
based. In order to enable the recognition of __start_SECNAME/__stop_SECNAME
symbols in the AIX linker, the -bdbg:namedsects:ss needs to be used.

Reviewed By: jsji, MaskRay, davidxl

Differential Revision: https://reviews.llvm.org/D124857