1664   if (isNullConstant(N1))  in visitADD()
1681   if (N0.getOpcode() == ISD::SUB && isNullConstant(N0.getOperand(0)))  in visitADD()
1684   if (N1.getOpcode() == ISD::SUB && isNullConstant(N1.getOperand(0)))  in visitADD()
1732       isNullConstant(N1.getOperand(0).getOperand(0)))  in visitADD()
1738       isNullConstant(N0.getOperand(0).getOperand(0)))  in visitADD()
1798   if (isNullConstant(N1))  in visitADDC()
1979   if (isNullConstant(N1))  in visitSUBC()
2474   if (isNullConstant(N1))  in visitMULHS()
2515   if (isNullConstant(N1))  in visitMULHU()
2874       if (isNullConstant(LR) && Op1 == ISD::SETEQ) {  in visitANDLike()
2900       Op0 == ISD::SETNE && ((isNullConstant(LR) && isAllOnesConstant(RR)) ||  in visitANDLike()
2901                             (isAllOnesConstant(LR) && isNullConstant(RR)))) {  in visitANDLike()
3631       if (isNullConstant(LR) && (Op1 == ISD::SETNE || Op1 == ISD::SETLT)) {  in visitORLike()
3816   if (isNullConstant(N1))  in visitOR()
4162   if (isNullConstant(N1))  in visitXOR()
4441   if (isNullConstant(N0))  in visitSHL()
4634   if (isNullConstant(N0))  in visitSRA()
4780   if (isNullConstant(N0))  in visitSRL()
5103       isNullConstant(N1) && isOneConstant(N2)) {  in visitSELECT()
5119   if (VT == VT0 && VT == MVT::i1 && isNullConstant(N1)) {  in visitSELECT()
5131   if (VT == MVT::i1 && isNullConstant(N2))  in visitSELECT()
5139   if (VT == MVT::i1 && (N0 == N2 || isNullConstant(N2)))  in visitSELECT()
6258   if (isNullConstant(Op0))  in isTruncateOf()
6260   else if (isNullConstant(Op1))  in isTruncateOf()
9710   if (isNullConstant(Offset))  in CombineToPreIndexedLoadStore()
9927       if (isNullConstant(Offset))  in CombineToPostIndexedLoadStore()
12758     if (!VecIn2.getNode() && (isNullConstant(Op) || isNullFPConstant(Op))) {  in visitBUILD_VECTOR()
14256   if (isNullConstant(N3) && CC == ISD::SETLT &&  in SimplifySelectCC()
14257       (isNullConstant(N1) ||                 // (a < 0) ? b : 0  in SimplifySelectCC()
14304       N0->getValueType(0) == VT && isNullConstant(N1) && isNullConstant(N2)) {  in SimplifySelectCC()
14327   if (N2C && isNullConstant(N3) && N2C->getAPIntValue().isPowerOf2() &&  in SimplifySelectCC()