426   if (TV && Q.isUndefValue(TV))  in threadBinOpOverSelect()
428   if (FV && Q.isUndefValue(FV))  in threadBinOpOverSelect()
640   if (Q.isUndefValue(Op1))  in simplifyAddInst()
758   if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifySubInst()
896   if (Q.isUndefValue(Op1) || match(Op1, m_Zero()))  in simplifyMulInst()
958   if (Q.isUndefValue(Op1) || isa<PoisonValue>(Op1))  in simplifyDivRem()
975       if (Elt && (Elt->isNullValue() || Q.isUndefValue(Elt)))  in simplifyDivRem()
987   if (Q.isUndefValue(Op0))  in simplifyDivRem()
1252   if (Q.isUndefValue(C))  in isPoisonShift()
1358   if (Q.isUndefValue(Op0))  in simplifyRightShift()
1382   if (Q.isUndefValue(Op0))  in simplifyShlInst()
2054   if (Q.isUndefValue(Op1))  in simplifyAndInst()
2335   if (Q.isUndefValue(Op1) || match(Op1, m_AllOnes()))  in simplifyOrInst()
2490   if (Q.isUndefValue(Op1))  in simplifyXorInst()
3609   if (Q.isUndefValue(RHS) && ICmpInst::isEquality(Pred))  in simplifyICmpInst()
3614   if (LHS == RHS || Q.isUndefValue(RHS))  in simplifyICmpInst()
3925   if (Q.isUndefValue(LHS) || Q.isUndefValue(RHS)) {  in simplifyFCmpInst()
4411     if (Q.isUndefValue(CondC))  in simplifySelectInst()
4456       (Q.isUndefValue(TrueVal) &&  in simplifySelectInst()
4462       (Q.isUndefValue(FalseVal) &&  in simplifySelectInst()
4486                (Q.isUndefValue(TEltC) && isGuaranteedNotToBePoison(FEltC)))  in simplifySelectInst()
4489                (Q.isUndefValue(FEltC) && isGuaranteedNotToBePoison(TEltC)))  in simplifySelectInst()
4562   if (Q.isUndefValue(Ptr))  in simplifyGEPInst()
4675   if (Q.isUndefValue(Val))  in simplifyInsertValueInst()
4683       if (Q.isUndefValue(Agg))  in simplifyInsertValueInst()
4717   if (Q.isUndefValue(Idx))  in simplifyInsertElementInst()
4723       (Q.isUndefValue(Val) && isGuaranteedNotToBePoison(Vec)))  in simplifyInsertElementInst()
4774     if (Q.isUndefValue(Vec))  in simplifyExtractElementInst()
4780   if (Q.isUndefValue(Idx))  in simplifyExtractElementInst()
4824     if (Q.isUndefValue(Incoming)) {  in simplifyPHINode()
5021     if (Q.isUndefValue(Op1) && RetTy == InVecTy &&  in simplifyShuffleVectorInst()
5113     bool IsUndef = Q.isUndefValue(V);  in simplifyFPOp()
5797     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5856     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5863     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1)) {  in simplifyBinaryIntrinsic()
5878     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5892     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5909     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5953     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6071     if (Q.isUndefValue(Op0) && Q.isUndefValue(Op1))  in simplifyIntrinsic()
6075     if (Q.isUndefValue(ShAmtArg))  in simplifyIntrinsic()
6135     if (Q.isUndefValue(Op1))  in simplifyIntrinsic()
6159         (Q.isUndefValue(Vec) || Vec == X) && IdxN == 0 &&  in simplifyIntrinsic()