393       if (!ConstElt->isNullValue() && !isa<UndefValue>(Elt))  in trimTrailingZerosInVector()
420       if (!Elt || (Elt != FirstComponent && !isa<UndefValue>(Elt)))  in defaultComponentBroadcast()
455     if (isa<UndefValue>(Src)) {  in instCombineIntrinsic()
514     if (isa<UndefValue>(Src)) {  in instCombineIntrinsic()
598     if (isa<UndefValue>(Src)) {  in instCombineIntrinsic()
599       return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));  in instCombineIntrinsic()
654     if (isa<UndefValue>(Src0) && isa<UndefValue>(Src1)) {  in instCombineIntrinsic()
655       return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));  in instCombineIntrinsic()
667     if (isa<UndefValue>(Src0) && isa<UndefValue>(Src1)) {  in instCombineIntrinsic()
668       return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));  in instCombineIntrinsic()
677     if (isa<UndefValue>(Src)) {  in instCombineIntrinsic()
750         if (!isa<UndefValue>(Src)) {  in instCombineIntrinsic()
751           IC.replaceOperand(II, I + 2, UndefValue::get(Src->getType()));  in instCombineIntrinsic()
775     if (match(Src0, PatternMatch::m_NaN()) || isa<UndefValue>(Src0)) {  in instCombineIntrinsic()
777     } else if (match(Src1, PatternMatch::m_NaN()) || isa<UndefValue>(Src1)) {  in instCombineIntrinsic()
779     } else if (match(Src2, PatternMatch::m_NaN()) || isa<UndefValue>(Src2)) {  in instCombineIntrinsic()
1017         BM->getZExtValue() != 0xF || isa<UndefValue>(Old))  in instCombineIntrinsic()
1021     return IC.replaceOperand(II, 0, UndefValue::get(Old->getType()));  in instCombineIntrinsic()
1029     if (isa<UndefValue>(VDstIn))  in instCombineIntrinsic()
1048     return IC.replaceOperand(II, 0, UndefValue::get(VDstIn->getType()));  in instCombineIntrinsic()
1142     if (isa<UndefValue>(II.getArgOperand(0)))  in instCombineIntrinsic()
1143       return IC.replaceInstUsesWith(II, UndefValue::get(II.getType()));  in instCombineIntrinsic()