Commit 2a40ec2d authored by Simon Pilgrim's avatar Simon Pilgrim
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[DAG] SimplifyDemandedBits - fix isOperationLegal typo in D146121 

We need to check that the simplified ISD::SRL node is legal, not the old one

Noticed while trying to isolate the regressions in D155472
parent d816c221

llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

+1 −1
Original line number Diff line number Diff line
@@ -1897,7 +1897,7 @@ bool TargetLowering::SimplifyDemandedBits( 
        if (isNarrowingProfitable(VT, HalfVT) &&

            isTypeDesirableForOp(ISD::SRL, HalfVT) &&

            isTruncateFree(VT, HalfVT) && isZExtFree(HalfVT, VT) &&

            (!TLO.LegalOperations() || isOperationLegal(ISD::SRL, VT)) &&

            (!TLO.LegalOperations() || isOperationLegal(ISD::SRL, HalfVT)) &&

            ((InDemandedMask.countLeadingZeros() >= (BitWidth / 2)) ||

             TLO.DAG.MaskedValueIsZero(Op0, HiBits))) {

          SDValue NewOp = TLO.DAG.getNode(ISD::TRUNCATE, dl, HalfVT, Op0);