135   if (isa<UndefValue>(V)) {  in ConstantFoldCastInstruction()
142     return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
289       } else if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
290         V = isa<UndefValue>(V1Element) ? V1Element : V2Element;  in ConstantFoldSelectInstruction()
306   if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
307     if (isa<UndefValue>(V1)) return V1;  in ConstantFoldSelectInstruction()
339   if (isa<UndefValue>(V1) && NotPoison(V2)) return V2;  in ConstantFoldSelectInstruction()
340   if (isa<UndefValue>(V2) && NotPoison(V1)) return V1;  in ConstantFoldSelectInstruction()
351   if (isa<PoisonValue>(Val) || isa<UndefValue>(Idx))  in ConstantFoldExtractElementInstruction()
355   if (isa<UndefValue>(Val))  in ConstantFoldExtractElementInstruction()
356     return UndefValue::get(ValVTy->getElementType());  in ConstantFoldExtractElementInstruction()
412   if (isa<UndefValue>(Idx))  in ConstantFoldInsertElementInstruction()
490       Result.push_back(UndefValue::get(EltTy));  in ConstantFoldShuffleVectorInstruction()
495       InElt = UndefValue::get(EltTy);  in ConstantFoldShuffleVectorInstruction()
559       (!C->getType()->isVectorTy() || IsScalableVector) && isa<UndefValue>(C);  in ConstantFoldUnaryInstruction()
636       (isa<UndefValue>(C1) || isa<UndefValue>(C2));  in ConstantFoldBinaryInstruction()
640       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
647       return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
649       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef & undef -> undef  in ConstantFoldBinaryInstruction()
654       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
660           return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
682       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef | undef -> undef  in ConstantFoldBinaryInstruction()
687       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
693       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
700       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
706       if (match(C1, m_NegZeroFP()) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
714       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
1145   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldCompareInstruction()
1151       return UndefValue::get(ResultTy);  in ConstantFoldCompareInstruction()
1350   if (isa<UndefValue>(C))  in ConstantFoldGetElementPtr()
1351     return UndefValue::get(GEPTy);  in ConstantFoldGetElementPtr()
1360       return IdxC->isNullValue() || isa<UndefValue>(IdxC);  in ConstantFoldGetElementPtr()