427   if (TV && Q.isUndefValue(TV))  in ThreadBinOpOverSelect()
429   if (FV && Q.isUndefValue(FV))  in ThreadBinOpOverSelect()
624   if (Q.isUndefValue(Op1))  in SimplifyAddInst()
749   if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in SimplifySubInst()
888   if (Q.isUndefValue(Op1) || match(Op1, m_Zero()))  in SimplifyMulInst()
950   if (Q.isUndefValue(Op1))  in simplifyDivRem()
967       if (Elt && (Elt->isNullValue() || Q.isUndefValue(Elt)))  in simplifyDivRem()
979   if (Q.isUndefValue(Op0))  in simplifyDivRem()
1234   if (Q.isUndefValue(C))  in isPoisonShift()
1340   if (Q.isUndefValue(Op0))  in SimplifyRightShift()
1363   if (Q.isUndefValue(Op0))  in SimplifyShlInst()
2015   if (Q.isUndefValue(Op1))  in SimplifyAndInst()
2189   if (Q.isUndefValue(Op1) || match(Op1, m_AllOnes()))  in SimplifyOrInst()
2363   if (Q.isUndefValue(Op1))  in SimplifyXorInst()
3394   if (Q.isUndefValue(RHS) && ICmpInst::isEquality(Pred))  in SimplifyICmpInst()
3399   if (LHS == RHS || Q.isUndefValue(RHS))  in SimplifyICmpInst()
3730   if (Q.isUndefValue(LHS) || Q.isUndefValue(RHS)) {  in SimplifyFCmpInst()
4216     if (Q.isUndefValue(CondC))  in SimplifySelectInst()
4248       (Q.isUndefValue(TrueVal) &&  in SimplifySelectInst()
4254       (Q.isUndefValue(FalseVal) &&  in SimplifySelectInst()
4278                (Q.isUndefValue(TEltC) && isGuaranteedNotToBePoison(FEltC)))  in SimplifySelectInst()
4281                (Q.isUndefValue(FEltC) && isGuaranteedNotToBePoison(TEltC)))  in SimplifySelectInst()
4341   if (Q.isUndefValue(Ops[0]))  in SimplifyGEPInst()
4453   if (Q.isUndefValue(Val))  in SimplifyInsertValueInst()
4461       if (Q.isUndefValue(Agg))  in SimplifyInsertValueInst()
4495   if (Q.isUndefValue(Idx))  in SimplifyInsertElementInst()
4501       (Q.isUndefValue(Val) && isGuaranteedNotToBePoison(Vec)))  in SimplifyInsertElementInst()
4552     if (Q.isUndefValue(Vec))  in SimplifyExtractElementInst()
4558   if (Q.isUndefValue(Idx))  in SimplifyExtractElementInst()
4601     if (Q.isUndefValue(Incoming)) {  in SimplifyPHINode()
4797     if (Q.isUndefValue(Op1) && RetTy == InVecTy &&  in SimplifyShuffleVectorInst()
4889     bool IsUndef = Q.isUndefValue(V);  in simplifyFPOp()
5570     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5627     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5634     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1)) {  in simplifyBinaryIntrinsic()
5649     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5663     if (Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5680     if (Op0 == Op1 || Q.isUndefValue(Op0) || Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5723     if (Q.isUndefValue(Op1))  in simplifyBinaryIntrinsic()
5822     if (Q.isUndefValue(Op0) && Q.isUndefValue(Op1))  in simplifyIntrinsic()
5826     if (Q.isUndefValue(ShAmtArg))  in simplifyIntrinsic()
5877     if (Q.isUndefValue(Op1))  in simplifyIntrinsic()
5901         (Q.isUndefValue(Vec) || Vec == X) && IdxN == 0 &&  in simplifyIntrinsic()