425   if (TV && Q.isUndefValue(TV))  in threadBinOpOverSelect()
427   if (FV && Q.isUndefValue(FV))  in threadBinOpOverSelect()
644   if (Q.isUndefValue(Op1))  in simplifyAddInst()
798   if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifySubInst()
940   if (Q.isUndefValue(Op1) || match(Op1, m_Zero()))  in simplifyMulInst()
1087   if (Q.isUndefValue(Op1) || isa<PoisonValue>(Op1))  in simplifyDivRem()
1104       if (Elt && (Elt->isNullValue() || Q.isUndefValue(Elt)))  in simplifyDivRem()
1116   if (Q.isUndefValue(Op0))  in simplifyDivRem()
1305   if (Q.isUndefValue(C))  in isPoisonShift()
1413   if (Q.isUndefValue(Op0))  in simplifyRightShift()
1438   if (Q.isUndefValue(Op0))  in simplifyShlInst()
2071   if (Q.isUndefValue(Op1))  in simplifyAndInst()
2350   if (Q.isUndefValue(Op1) || match(Op1, m_AllOnes()))  in simplifyOrInst()
2532   if (Q.isUndefValue(Op1))  in simplifyXorInst()
3761   if (Q.isUndefValue(RHS) && ICmpInst::isEquality(Pred))  in simplifyICmpInst()
3766   if (LHS == RHS || Q.isUndefValue(RHS))  in simplifyICmpInst()
4091   if (Q.isUndefValue(LHS) || Q.isUndefValue(RHS)) {  in simplifyFCmpInst()
4782     if (Q.isUndefValue(CondC))  in simplifySelectInst()
4889       (Q.isUndefValue(TrueVal) && impliesPoison(FalseVal, Cond)))  in simplifySelectInst()
4894       (Q.isUndefValue(FalseVal) && impliesPoison(TrueVal, Cond)))  in simplifySelectInst()
4917                (Q.isUndefValue(TEltC) && isGuaranteedNotToBePoison(FEltC)))  in simplifySelectInst()
4920                (Q.isUndefValue(FEltC) && isGuaranteedNotToBePoison(TEltC)))  in simplifySelectInst()
4990   if (Q.isUndefValue(Ptr))  in simplifyGEPInst()
5104       (Q.isUndefValue(Val) && isGuaranteedNotToBePoison(Agg)))  in simplifyInsertValueInst()
5114           (Q.isUndefValue(Agg) &&  in simplifyInsertValueInst()
5149   if (Q.isUndefValue(Idx))  in simplifyInsertElementInst()
5155       (Q.isUndefValue(Val) && isGuaranteedNotToBePoison(Vec)))  in simplifyInsertElementInst()
5206     if (Q.isUndefValue(Vec))  in simplifyExtractElementInst()
5212   if (Q.isUndefValue(Idx))  in simplifyExtractElementInst()
5264     if (Q.isUndefValue(Incoming)) {  in simplifyPHINode()
5461     if (Q.isUndefValue(Op1) && RetTy == InVecTy &&  in simplifyShuffleVectorInst()
5584     bool IsUndef = Q.isUndefValue(V);  in simplifyFPOp()
6159   if (Q.isUndefValue(Op0))  in simplifyLdexp()
6166     if (Q.isUndefValue(Op1))  in simplifyLdexp()
6421     if (Q.isUndefValue(Op0) || match(Op0, m_Zero()))  in simplifyBinaryIntrinsic()
6435     if (match(Op1, m_AllOnes()) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6466     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6518     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6525     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1)) {  in simplifyBinaryIntrinsic()
6540     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6554     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6571     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6614     if (Q.isUndefValue(Op0))  in simplifyBinaryIntrinsic()
6631     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
6740     if (Q.isUndefValue(Op0) && Q.isUndefValue(Op1))  in simplifyIntrinsic()
6744     if (Q.isUndefValue(ShAmtArg))  in simplifyIntrinsic()
6797     if (Q.isUndefValue(Op1))  in simplifyIntrinsic()
6821         (Q.isUndefValue(Vec) || Vec == X) && IdxN == 0 &&  in simplifyIntrinsic()