[all-commits] [llvm/llvm-project] 721d57: [X86] Return from SimplifyDemandedBitsForTargetNod...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 721d57f952ba0dbe02908fc897374dd6324668b9
      https://github.com/llvm/llvm-project/commit/721d57f952ba0dbe02908fc897374dd6324668b9
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-09-18 (Fri, 18 Sep 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86] Return from SimplifyDemandedBitsForTargetNode after calculating known bits for VSHLI/VSRAI/VSRLI.

We were breaking out of the switch which falls into the default
implementation of SimplifyDemandedBitsForTargetNode which is a
wrapper around computeKnownBits. So we end up doing the recursion
and known bits calculation all over again. Instead we should return
with the known bits we calculated in the switch.