[all-commits] [llvm/llvm-project] ed8dff: [X86] getFauxShuffle - don't assume an UNDEF src e...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ed8dffef4c37d831a0bcc713ab56f38d8d9612df
      https://github.com/llvm/llvm-project/commit/ed8dffef4c37d831a0bcc713ab56f38d8d9612df
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-04-28 (Thu, 28 Apr 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining.ll

  Log Message:
  -----------
  [X86] getFauxShuffle - don't assume an UNDEF src element for AND/ANDNP results in an UNDEF shuffle mask index

The other src element might be zero, guaranteeing zero.

Fixes #55157