[all-commits] [llvm/llvm-project] 70293b: [DAG] SimplifyMultipleUseDemandedBits - remove sup...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 70293ba26feecdab6fe3c0e71503424f0d38e838
      https://github.com/llvm/llvm-project/commit/70293ba26feecdab6fe3c0e71503424f0d38e838
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-05-08 (Fri, 08 May 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/test/CodeGen/AMDGPU/fshr.ll
    M llvm/test/CodeGen/Thumb2/lsll0.ll
    M llvm/test/CodeGen/Thumb2/mve-vld3.ll
    M llvm/test/CodeGen/X86/bitcast-vector-bool.ll
    M llvm/test/CodeGen/X86/div-rem-pair-recomposition-signed.ll
    M llvm/test/CodeGen/X86/div-rem-pair-recomposition-unsigned.ll
    M llvm/test/CodeGen/X86/shrink_vmul.ll
    M llvm/test/CodeGen/X86/vec_smulo.ll
    M llvm/test/CodeGen/X86/vec_umulo.ll
    M llvm/test/CodeGen/X86/vector-reduce-mul.ll

  Log Message:
  -----------
  [DAG] SimplifyMultipleUseDemandedBits - remove superfluous bitcasts

If the SimplifyMultipleUseDemandedBits calls BITCASTs that peek through back to the original type then we can remove the BITCASTs entirely.

Differential Revision: https://reviews.llvm.org/D79572