[all-commits] [llvm/llvm-project] 8310c9: [X86][AVX] Call SimplifyDemandedBits on MaskedLoad...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8310c9b74102a5a66fae18596baf9fcc5ed63f61
      https://github.com/llvm/llvm-project/commit/8310c9b74102a5a66fae18596baf9fcc5ed63f61
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-05-24 (Sun, 24 May 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/masked_load.ll
    M llvm/test/CodeGen/X86/pr45563-2.ll

  Log Message:
  -----------
  [X86][AVX] Call SimplifyDemandedBits on MaskedLoadSDNode with non-boolean masks

On X86 (AVX1/AVX2), non-boolean masked loads only demand the sign bit of the mask, we already do the equivalent for masked stores.

Annoyingly I can't easily handle this inside TargetLowering::SimplifyDemandedBits as this is an x86 specific case for a generic node.

Differential Revision: https://reviews.llvm.org/D80478