81     return RHS.isNullValue();  in isSignBitCheck()
109   if (C.isNullValue())  in isSignTest()
1144   if (AP2.isNullValue())  in foldICmpShrConstConst()
1203   if (AP2.isNullValue())  in foldICmpShlConstConst()
1607   if (Shift->hasOneUse() && C1.isNullValue() && Cmp.isEquality() &&  in foldICmpAndShift()
1631       C1.isNullValue() && match(And->getOperand(1), m_One()))  in foldICmpAndConstConst()
1672   if (!Cmp.isSigned() && C1.isNullValue() && And->getOperand(0)->hasOneUse() &&  in foldICmpAndConstConst()
1747   if (And->hasOneUse() && C.isNullValue() && match(Y, m_APInt(C2))) {  in foldICmpAndConstant()
1784   if (!Cmp.isEquality() || !C.isNullValue() || !Or->hasOneUse())  in foldICmpOrConstant()
2026       C.isNullValue())  in foldICmpShrConstant()
2170   if (C2->isNullValue() || C2->isOneValue() ||  in foldICmpDivConstant()
2211     if (C.isNullValue()) {       // (X / pos) op 0  in foldICmpDivConstant()
2232     if (C.isNullValue()) { // (X / neg) op 0  in foldICmpDivConstant()
2328     if (Pred == ICmpInst::ICMP_SGT && C.isNullValue())  in foldICmpSubConstant()
2332     if (Pred == ICmpInst::ICMP_SLT && C.isNullValue())  in foldICmpSubConstant()
2638     if (C.isNullValue() && BO->hasOneUse()) {  in foldICmpBinOpEqualityWithConstant()
2655     } else if (C.isNullValue()) {  in foldICmpBinOpEqualityWithConstant()
2676       } else if (C.isNullValue()) {  in foldICmpBinOpEqualityWithConstant()
2689       } else if (C.isNullValue()) {  in foldICmpBinOpEqualityWithConstant()
2727       if (C.isNullValue() && (~(*BOC) + 1).isPowerOf2()) {  in foldICmpBinOpEqualityWithConstant()
2736     if (C.isNullValue() && BO->hasNoSignedWrap()) {  in foldICmpBinOpEqualityWithConstant()
2738       if (match(BOp1, m_APInt(BOC)) && !BOC->isNullValue()) {  in foldICmpBinOpEqualityWithConstant()
2747     if (C.isNullValue()) {  in foldICmpBinOpEqualityWithConstant()
2808     bool IsZero = C.isNullValue();  in foldICmpIntrinsicWithConstant()
2837     if (RHSC->isNullValue() &&  in foldICmpInstWithConstantNotInt()
2901     if (RHSC->isNullValue() &&  in foldICmpInstWithConstantNotInt()
3387       if (match(BO0->getOperand(1), m_APInt(C)) && !C->isNullValue() &&  in foldICmpBinOp()