llvm-project

81aafd91 - [X86] canCreateUndefOrPoisonForTargetNode/isGuaranteedNotToBeUndefOrPoisonForTargetNode - add X86ISD::PSHUFB handling (#160842)

[X86] canCreateUndefOrPoisonForTargetNode/isGuaranteedNotToBeUndefOrPoisonForTargetNode - add X86ISD::PSHUFB handling (#160842) X86ISD::PSHUFB shuffles can't create undef/poison itself, allowing us to fold freeze(pshufb(x,y)) -> pshufb(freeze(x),freeze(y))