[all-commits] [llvm/llvm-project] 7b2716: [Driver] Make "-fno-split-machine-functions" a val...

[Han Shen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7b27167a57c5809e9936fe3c0920054009cb46f4
      https://github.com/llvm/llvm-project/commit/7b27167a57c5809e9936fe3c0920054009cb46f4
  Author: Han Shen <shenhan at google.com>
  Date:   2023-08-24 (Thu, 24 Aug 2023)

  Changed paths:
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/Driver/fsplit-machine-functions.c

  Log Message:
  -----------
  [Driver] Make "-fno-split-machine-functions" a valid flag for all archs

Previously, clang reports an error when -fno-split-machine-functions
is used for non-X86 archs.

However, in some cases, users may specify flags as
"-fsplit-machine-functions -fother-flags
-fno-split-machine-functions", the first one is from a global flag
set, the last one is used to negate the global flag, we think this is
a valid usage mode.

Another cases is when clang is used to invoke multiple workloads, like
"-x cuda -fsplit-machine-functions -Xarch_device
-fno-split-machine-functions", the latter is used to negate
-fsplit-machine-functions when invoke workloads for GPU."

This change makes this work.

Reviewed By: maskray

Differential Revision: https://reviews.llvm.org/D158755