[all-commits] [llvm/llvm-project] e38fc1: [X86] Introduce x86-cmov-converter-force-all

[Amir Ayupov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e38fc14c43b00f0606ad31a6df9dad1c54413afc
      https://github.com/llvm/llvm-project/commit/e38fc14c43b00f0606ad31a6df9dad1c54413afc
  Author: Amir Ayupov <aaupov at fb.com>
  Date:   2022-02-24 (Thu, 24 Feb 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86CmovConversion.cpp
    M llvm/test/CodeGen/X86/x86-cmov-converter.ll

  Log Message:
  -----------
  [X86] Introduce x86-cmov-converter-force-all

Introduce an option to expand all CMOV groups into hammocks, matching GCC's
`-fno-if-conversion2` flag. The motivation is to leave CMOV conversion
opportunities to a binary optimizer that can make the decision based on branch
misprediction rate (available e.g. in Intel's LBR).

Reviewed By: MaskRay, skan

Differential Revision: https://reviews.llvm.org/D119777