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Make sure to auto-cse nullary ops

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llvm-svn: 23224
This commit is contained in:
Chris Lattner 2005-09-02 19:36:17 +00:00
parent 5ba7b615ed
commit b95b280bee
1 changed files with 9 additions and 3 deletions
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12
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -326,7 +326,10 @@ void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
break;
default:
if (N->getNumValues() == 1) {
if (N->getNumOperands() == 1) {
if (N->getNumOperands() == 0) {
Erased = NullaryOps.erase(std::make_pair(N->getOpcode(),
N->getValueType(0)));
} else if (N->getNumOperands() == 1) {
Erased =
UnaryOps.erase(std::make_pair(N->getOpcode(),
std::make_pair(N->getOperand(0),
@ -1010,8 +1013,11 @@ SDOperand SelectionDAG::SimplifySelectCC(SDOperand N1, SDOperand N2,
/// getNode - Gets or creates the specified node.
///
SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) {
SDNode *N = new SDNode(Opcode, VT);
AllNodes.push_back(N);
SDNode *&N = NullaryOps[std::make_pair(Opcode, VT)];
if (!N) {
N = new SDNode(Opcode, VT);
AllNodes.push_back(N);
}
return SDOperand(N, 0);
}