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generalize

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llvm-svn: 34910
This commit is contained in:
Chris Lattner 2007-03-04 20:08:45 +00:00
parent 06e4ea2b21
commit 7021449d8b
1 changed files with 9 additions and 5 deletions
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14
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -757,8 +757,10 @@ SDOperand DAGCombiner::visitADDC(SDNode *N) {
SDOperand(N, 1));
// canonicalize constant to RHS.
if (N0C && !N1C)
return DAG.getNode(ISD::ADDC, VT, N1, N0);
if (N0C && !N1C) {
SDOperand Ops[] = { N1, N0 };
return DAG.getNode(ISD::ADDC, N->getVTList(), Ops, 2);
}
// fold (add x, 0) -> x + no carry out
//if (N1C && N1C->isNullValue())
@ -772,11 +774,13 @@ SDOperand DAGCombiner::visitADDE(SDNode *N) {
SDOperand N1 = N->getOperand(1);
ConstantSDNode *N0C = dyn_cast<ConstantSDNode>(N0);
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
MVT::ValueType VT = N0.getValueType();
//MVT::ValueType VT = N0.getValueType();
// canonicalize constant to RHS
if (N0C && !N1C)
return DAG.getNode(ISD::ADDE, VT, N1, N0, N->getOperand(2));
if (N0C && !N1C) {
SDOperand Ops[] = { N1, N0, N->getOperand(2) };
return DAG.getNode(ISD::ADDE, N->getVTList(), Ops, 3);
}
// fold (add x, 0) -> x
//if (N1C && N1C->isNullValue())