195   if (isa<UndefValue>(V)) {  in ConstantFoldCastInstruction()
202     return UndefValue::get(DestTy);  in ConstantFoldCastInstruction()
357       } else if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
358         V = isa<UndefValue>(V1Element) ? V1Element : V2Element;  in ConstantFoldSelectInstruction()
374   if (isa<UndefValue>(Cond)) {  in ConstantFoldSelectInstruction()
375     if (isa<UndefValue>(V1)) return V1;  in ConstantFoldSelectInstruction()
407   if (isa<UndefValue>(V1) && NotPoison(V2)) return V2;  in ConstantFoldSelectInstruction()
408   if (isa<UndefValue>(V2) && NotPoison(V1)) return V1;  in ConstantFoldSelectInstruction()
419   if (isa<PoisonValue>(Val) || isa<UndefValue>(Idx))  in ConstantFoldExtractElementInstruction()
423   if (isa<UndefValue>(Val))  in ConstantFoldExtractElementInstruction()
424     return UndefValue::get(ValVTy->getElementType());  in ConstantFoldExtractElementInstruction()
480   if (isa<UndefValue>(Idx))  in ConstantFoldInsertElementInstruction()
557       Result.push_back(UndefValue::get(EltTy));  in ConstantFoldShuffleVectorInstruction()
562       InElt = UndefValue::get(EltTy);  in ConstantFoldShuffleVectorInstruction()
626       (!C->getType()->isVectorTy() || IsScalableVector) && isa<UndefValue>(C);  in ConstantFoldUnaryInstruction()
703       (isa<UndefValue>(C1) || isa<UndefValue>(C2));  in ConstantFoldBinaryInstruction()
707       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
714       return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
716       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef & undef -> undef  in ConstantFoldBinaryInstruction()
721       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
727           return UndefValue::get(C1->getType());  in ConstantFoldBinaryInstruction()
749       if (isa<UndefValue>(C1) && isa<UndefValue>(C2)) // undef | undef -> undef  in ConstantFoldBinaryInstruction()
754       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
760       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
767       if (isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
773       if (match(C1, m_NegZeroFP()) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
781       if (isa<UndefValue>(C1) && isa<UndefValue>(C2))  in ConstantFoldBinaryInstruction()
1229   if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {  in ConstantFoldCompareInstruction()
1235       return UndefValue::get(ResultTy);  in ConstantFoldCompareInstruction()
1554   if (isa<UndefValue>(C))  in ConstantFoldGetElementPtr()
1556     return InBounds ? PoisonValue::get(GEPTy) : UndefValue::get(GEPTy);  in ConstantFoldGetElementPtr()
1565       return IdxC->isNullValue() || isa<UndefValue>(IdxC);  in ConstantFoldGetElementPtr()