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Don't auto-cse nodes that return flags

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llvm-svn: 23055
This commit is contained in:
Chris Lattner 2005-08-25 19:12:10 +00:00
parent cb3910fa74
commit 18572f3c67
1 changed files with 38 additions and 17 deletions
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47
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -1021,9 +1021,14 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
break;
}
SDNode *&N = UnaryOps[std::make_pair(Opcode, std::make_pair(Operand, VT))];
if (N) return SDOperand(N, 0);
SDNode *N;
if (VT != MVT::Flag) { // Don't CSE flag producing nodes
SDNode *&E = UnaryOps[std::make_pair(Opcode, std::make_pair(Operand, VT))];
if (E) return SDOperand(N, 0);
E = N = new SDNode(Opcode, Operand);
} else {
N = new SDNode(Opcode, Operand);
}
N->setValueTypes(VT);
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -1582,7 +1587,8 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
// Memoize this node if possible.
SDNode *N;
if (Opcode != ISD::CALLSEQ_START && Opcode != ISD::CALLSEQ_END) {
if (Opcode != ISD::CALLSEQ_START && Opcode != ISD::CALLSEQ_END &&
VT != MVT::Flag) {
SDNode *&BON = BinaryOps[std::make_pair(Opcode, std::make_pair(N1, N2))];
if (BON) return SDOperand(BON, 0);
@ -1704,11 +1710,15 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
Ops.push_back(N2);
Ops.push_back(N3);
// Memoize nodes.
SDNode *&N = OneResultNodes[std::make_pair(Opcode, std::make_pair(VT, Ops))];
if (N) return SDOperand(N, 0);
// Memoize node if it doesn't produce a flag.
SDNode *N;
if (VT != MVT::Flag) {
SDNode *&E = OneResultNodes[std::make_pair(Opcode,std::make_pair(VT, Ops))];
if (E) return SDOperand(E, 0);
E = N = new SDNode(Opcode, N1, N2, N3);
} else {
N = new SDNode(Opcode, N1, N2, N3);
}
N->setValueTypes(VT);
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -1833,9 +1843,15 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
}
// Memoize nodes.
SDNode *&N = OneResultNodes[std::make_pair(Opcode, std::make_pair(VT, Ops))];
if (N) return SDOperand(N, 0);
SDNode *N;
if (VT != MVT::Flag) {
SDNode *&E =
OneResultNodes[std::make_pair(Opcode, std::make_pair(VT, Ops))];
if (E) return SDOperand(E, 0);
E = N = new SDNode(Opcode, Ops);
} else {
N = new SDNode(Opcode, Ops);
}
N->setValueTypes(VT);
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -1888,11 +1904,16 @@ SDOperand SelectionDAG::getNode(unsigned Opcode,
#endif
}
// Memoize the node.
SDNode *&N = ArbitraryNodes[std::make_pair(Opcode, std::make_pair(ResultTys,
Ops))];
if (N) return SDOperand(N, 0);
// Memoize the node unless it returns a flag.
SDNode *N;
if (ResultTys.back() != MVT::Flag) {
SDNode *&E =
ArbitraryNodes[std::make_pair(Opcode, std::make_pair(ResultTys, Ops))];
if (E) return SDOperand(E, 0);
E = N = new SDNode(Opcode, Ops);
} else {
N = new SDNode(Opcode, Ops);
}
N->setValueTypes(ResultTys);
AllNodes.push_back(N);
return SDOperand(N, 0);