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the two non-mask arguments to a shufflevector must be the same width, but they do not have to be the same
width as the result value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64335 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1538,11 +1538,12 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts,
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}
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}
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}
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}
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APInt UndefElts4(LHSVWidth, 0);
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TmpV = SimplifyDemandedVectorElts(I->getOperand(0), LeftDemanded,
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TmpV = SimplifyDemandedVectorElts(I->getOperand(0), LeftDemanded,
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UndefElts2, Depth+1);
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UndefElts4, Depth+1);
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if (TmpV) { I->setOperand(0, TmpV); MadeChange = true; }
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if (TmpV) { I->setOperand(0, TmpV); MadeChange = true; }
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APInt UndefElts3(VWidth, 0);
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APInt UndefElts3(LHSVWidth, 0);
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TmpV = SimplifyDemandedVectorElts(I->getOperand(1), RightDemanded,
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TmpV = SimplifyDemandedVectorElts(I->getOperand(1), RightDemanded,
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UndefElts3, Depth+1);
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UndefElts3, Depth+1);
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if (TmpV) { I->setOperand(1, TmpV); MadeChange = true; }
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if (TmpV) { I->setOperand(1, TmpV); MadeChange = true; }
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@ -1553,7 +1554,7 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts,
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if (MaskVal == -1u) {
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if (MaskVal == -1u) {
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UndefElts.set(i);
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UndefElts.set(i);
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} else if (MaskVal < LHSVWidth) {
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} else if (MaskVal < LHSVWidth) {
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if (UndefElts2[MaskVal]) {
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if (UndefElts4[MaskVal]) {
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NewUndefElts = true;
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NewUndefElts = true;
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UndefElts.set(i);
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UndefElts.set(i);
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}
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}
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