524   if (isa<UndefValue>(V)) {  in ConstantFoldCastInstruction()
531     return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
614         return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
679         return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
744       } else if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
745         V = isa<UndefValue>(V1Element) ? V1Element : V2Element;  in ConstantFoldSelectInstruction()
758   if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
759     if (isa<UndefValue>(V1)) return V1;  in ConstantFoldSelectInstruction()
762   if (isa<UndefValue>(V1)) return V2;  in ConstantFoldSelectInstruction()
763   if (isa<UndefValue>(V2)) return V1;  in ConstantFoldSelectInstruction()
782   if (isa<UndefValue>(Val))  // ee(undef, x) -> undef  in ConstantFoldExtractElementInstruction()
783     return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
787   if (isa<UndefValue>(Idx))  in ConstantFoldExtractElementInstruction()
788     return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
793       return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
802   if (isa<UndefValue>(Idx))  in ConstantFoldInsertElementInstruction()
803     return UndefValue::get(Val->getType());  in ConstantFoldInsertElementInstruction()
810     return UndefValue::get(Val->getType());  in ConstantFoldInsertElementInstruction()
836   if (isa<UndefValue>(Mask))  in ConstantFoldShuffleVectorInstruction()
837     return UndefValue::get(VectorType::get(EltTy, MaskNumElts));  in ConstantFoldShuffleVectorInstruction()
849       Result.push_back(UndefValue::get(EltTy));  in ConstantFoldShuffleVectorInstruction()
854       InElt = UndefValue::get(EltTy);  in ConstantFoldShuffleVectorInstruction()
921   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldBinaryInstruction()
924       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
931       return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
933       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef & undef -> undef  in ConstantFoldBinaryInstruction()
938       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
944           return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
952       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
971       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef | undef -> undef  in ConstantFoldBinaryInstruction()
976       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
985       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
995       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
1015   assert(!isa<UndefValue>(C1) && !isa<UndefValue>(C2) &&  in ConstantFoldBinaryInstruction()
1037         return UndefValue::get(CI2->getType());               // X / 0 == undef  in ConstantFoldBinaryInstruction()
1044         return UndefValue::get(CI2->getType());               // X % 0 == undef  in ConstantFoldBinaryInstruction()
1138           return UndefValue::get(CI1->getType());   // MIN_INT / -1 -> undef  in ConstantFoldBinaryInstruction()
1146           return UndefValue::get(CI1->getType());   // MIN_INT % -1 -> undef  in ConstantFoldBinaryInstruction()
1157         return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1161         return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1165         return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1693   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldCompareInstruction()
1700       return UndefValue::get(ResultTy);  in ConstantFoldCompareInstruction()
2058   if (isa<UndefValue>(C)) {  in ConstantFoldGetElementPtrImpl()
2065     return UndefValue::get(GEPTy);  in ConstantFoldGetElementPtrImpl()