511   if (isa<UndefValue>(V)) {  in ConstantFoldCastInstruction()
518     return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
718   if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
719     if (isa<UndefValue>(V1)) return V1;  in ConstantFoldSelectInstruction()
722   if (isa<UndefValue>(V1)) return V2;  in ConstantFoldSelectInstruction()
723   if (isa<UndefValue>(V2)) return V1;  in ConstantFoldSelectInstruction()
742   if (isa<UndefValue>(Val))  // ee(undef, x) -> undef  in ConstantFoldExtractElementInstruction()
743     return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
747   if (isa<UndefValue>(Idx))  in ConstantFoldExtractElementInstruction()
748     return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
754       return UndefValue::get(Val->getType()->getVectorElementType());  in ConstantFoldExtractElementInstruction()
790   if (isa<UndefValue>(Mask))  in ConstantFoldShuffleVectorInstruction()
791     return UndefValue::get(VectorType::get(EltTy, MaskNumElts));  in ConstantFoldShuffleVectorInstruction()
803       Result.push_back(UndefValue::get(EltTy));  in ConstantFoldShuffleVectorInstruction()
808       InElt = UndefValue::get(EltTy);  in ConstantFoldShuffleVectorInstruction()
873   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldBinaryInstruction()
876       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
883       return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
885       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef & undef -> undef  in ConstantFoldBinaryInstruction()
893           (isa<UndefValue>(C1) && isa<UndefValue>(C2)))  in ConstantFoldBinaryInstruction()
894         return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
909       if (!isa<UndefValue>(C2))                    // undef / X -> 0  in ConstantFoldBinaryInstruction()
913       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef | undef -> undef  in ConstantFoldBinaryInstruction()
917       if (isa<UndefValue>(C2) && isa<UndefValue>(C1))  in ConstantFoldBinaryInstruction()
922       if (!isa<UndefValue>(C2))                     // undef ashr X --> all ones  in ConstantFoldBinaryInstruction()
924       else if (isa<UndefValue>(C1))   in ConstantFoldBinaryInstruction()
929       if (isa<UndefValue>(C2) && isa<UndefValue>(C1))  in ConstantFoldBinaryInstruction()
955         return UndefValue::get(CI2->getType());               // X / 0 == undef  in ConstantFoldBinaryInstruction()
962         return UndefValue::get(CI2->getType());               // X % 0 == undef  in ConstantFoldBinaryInstruction()
1057           return UndefValue::get(CI1->getType());   // MIN_INT / -1 -> undef  in ConstantFoldBinaryInstruction()
1065           return UndefValue::get(CI1->getType());   // MIN_INT % -1 -> undef  in ConstantFoldBinaryInstruction()
1078           return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1085           return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1092           return UndefValue::get(C1->getType()); // too big shift is undef  in ConstantFoldBinaryInstruction()
1586   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldCompareInstruction()
1591         (isa<UndefValue>(C1) && isa<UndefValue>(C2)))  in ConstantFoldCompareInstruction()
1592       return UndefValue::get(ResultTy);  in ConstantFoldCompareInstruction()
1908   if (isa<UndefValue>(C)) {  in ConstantFoldGetElementPtrImpl()
1912     return UndefValue::get(PointerType::get(Ty, Ptr->getAddressSpace()));  in ConstantFoldGetElementPtrImpl()