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eliminate uses of SelectionDAG::getBR2Way_CC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25767 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-29 06:00:45 +00:00
parent 8e51773bb7
commit 03d5e877fd
2 changed files with 24 additions and 9 deletions
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13
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2092,9 +2092,16 @@ SDOperand DAGCombiner::visitBRTWOWAY_CC(SDNode *N) {
if (SCCC && SCCC->isNullValue())
return DAG.getNode(ISD::BR, MVT::Other, Chain, N5);
// fold to a simpler setcc
if (SCC.Val && SCC.getOpcode() == ISD::SETCC)
return DAG.getBR2Way_CC(Chain, SCC.getOperand(2), SCC.getOperand(0),
SCC.getOperand(1), N4, N5);
if (SCC.Val && SCC.getOpcode() == ISD::SETCC) {
std::vector<SDOperand> Ops;
Ops.push_back(Chain);
Ops.push_back(SCC.getOperand(2));
Ops.push_back(SCC.getOperand(0));
Ops.push_back(SCC.getOperand(1));
Ops.push_back(N4);
Ops.push_back(N5);
return DAG.getNode(ISD::BRTWOWAY_CC, MVT::Other, Ops);
}
return SDOperand();
}

20
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -749,14 +749,22 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// BRCOND/BR pair.
if (TLI.isOperationLegal(ISD::BRTWOWAY_CC, MVT::Other)) {
if (Tmp2.getOpcode() == ISD::SETCC) {
Result = DAG.getBR2Way_CC(Tmp1, Tmp2.getOperand(2),
Tmp2.getOperand(0), Tmp2.getOperand(1),
Node->getOperand(2), Node->getOperand(3));
Tmp3 = Tmp2.getOperand(0);
Tmp4 = Tmp2.getOperand(1);
Tmp2 = Tmp2.getOperand(2);
} else {
Result = DAG.getBR2Way_CC(Tmp1, DAG.getCondCode(ISD::SETNE), Tmp2,
DAG.getConstant(0, Tmp2.getValueType()),
Node->getOperand(2), Node->getOperand(3));
Tmp3 = Tmp2;
Tmp4 = DAG.getConstant(0, Tmp2.getValueType());
Tmp2 = DAG.getCondCode(ISD::SETNE);
}
std::vector<SDOperand> Ops;
Ops.push_back(Tmp1);
Ops.push_back(Tmp2);
Ops.push_back(Tmp3);
Ops.push_back(Tmp4);
Ops.push_back(Node->getOperand(2));
Ops.push_back(Node->getOperand(3));
Result = DAG.getNode(ISD::BRTWOWAY_CC, MVT::Other, Ops);
} else {
Result = DAG.getNode(ISD::BRCOND, MVT::Other, Tmp1, Tmp2,
Node->getOperand(2));