[all-commits] [llvm/llvm-project] 1552b9: [X86] X86FixupVectorConstantsPass - attempt to mat...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1552b91162bbb410971e2d4e5ec7afd1c7cc932f
      https://github.com/llvm/llvm-project/commit/1552b91162bbb410971e2d4e5ec7afd1c7cc932f
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-11-21 (Tue, 21 Nov 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86FixupVectorConstants.cpp
    M llvm/test/CodeGen/X86/combine-abs.ll
    M llvm/test/CodeGen/X86/vector-shuffle-128-v16.ll
    M llvm/test/CodeGen/X86/vector-shuffle-256-v32.ll

  Log Message:
  -----------
  [X86] X86FixupVectorConstantsPass - attempt to match VEX logic ops back to EVEX if we can create a broadcast fold

On non-DQI AVX512 targets, X86InstrInfo::setExecutionDomainCustom will convert EVEX int-domain instructions to VEX fp-domain instructions. But, if we have the chance to use a broadcast fold we're better off using a EVEX instruction, so handle a reverse fold.