[all-commits] [llvm/llvm-project] ac1d14: [Clang][AIX][p] Manually Claim -p in front end

[Michael Francis via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac1d143b0ef924cf2725bb36537f18ae2c7f9c4f
      https://github.com/llvm/llvm-project/commit/ac1d143b0ef924cf2725bb36537f18ae2c7f9c4f
  Author: Michael Francis <michaelfrancis at ibm.com>
  Date:   2023-03-15 (Wed, 15 Mar 2023)

  Changed paths:
    M clang/lib/Driver/ToolChains/AIX.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    A clang/test/Driver/ibm-profiling.c
    R clang/test/Driver/zos-profiling-error.c

  Log Message:
  -----------
  [Clang][AIX][p] Manually Claim -p in front end

The current implementation of `-p` does not claim the argument once it
is passed. Since it pushes `-pg` directly, it is only ever referred to
again when linking. As a result, when compiling with `-S`, the compiler
warns that `-p` goes unused even though that is not the case.

With this patch, if both `-p` and `-pg` are passed, the argument that is
passed second will take precedence. `-p` will still throw an error on
unsupported platforms, regardless of precedence.

This revision includes a test case, which has been placed in
`clang/test/Driver/zos-profiling-error.c`. As a result,
`zos-profiling-error.c` has been renamed to `ibm-profiling.c`. This
revision also passes `clang/test/Driver/aix-ld.c`.

Differential Revision: https://reviews.llvm.org/D145021