[all-commits] [llvm/llvm-project] 343e94: [X86] canCreateUndefOrPoisonForTargetNode - add GF...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 343e944c07a4ca2dc5eeb495fc891eac60400a7c
      https://github.com/llvm/llvm-project/commit/343e944c07a4ca2dc5eeb495fc891eac60400a7c
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-08-26 (Tue, 26 Aug 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/combine-gfni.ll

  Log Message:
  -----------
  [X86] canCreateUndefOrPoisonForTargetNode - add GF2P8AFFINEINVQB / GF2P8AFFINEQB / GF2P8MULB handling (#155409)

All 3 instructions are well defined bit twiddling operations - they do
not introduce undef/poison with well defined inputs.

Fixes regressions in #152107



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