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Add support for targets that want to custom expand select_cc in some cases. 

llvm-svn: 23071
This commit is contained in:
Chris Lattner 2005-08-26 00:23:59 +00:00
parent dff50cadaa
commit 5f573416cd
1 changed files with 24 additions and 6 deletions
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30
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1113,12 +1113,30 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp4 = LegalizeOp(Node->getOperand(3)); // False
if (isTypeLegal(Node->getOperand(0).getValueType())) {
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
Tmp3 != Node->getOperand(2) || Tmp4 != Node->getOperand(3)) {
Result = DAG.getNode(ISD::SELECT_CC, Node->getValueType(0), Tmp1, Tmp2,
Tmp3, Tmp4, Node->getOperand(4));
// Everything is legal, see if we should expand this op or something.
switch (TLI.getOperationAction(ISD::SELECT_CC,
Node->getOperand(0).getValueType())) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Custom: {
SDOperand Tmp =
TLI.LowerOperation(DAG.getNode(ISD::SELECT_CC, Node->getValueType(0),
Node->getOperand(0),
Node->getOperand(1), Tmp3, Tmp4,
Node->getOperand(5)), DAG);
if (Tmp.Val) {
Result = LegalizeOp(Tmp);
break;
}
} // FALLTHROUGH if the target can't lower this operation after all.
case TargetLowering::Legal:
Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
Tmp3 != Node->getOperand(2) || Tmp4 != Node->getOperand(3)) {
Result = DAG.getNode(ISD::SELECT_CC, Node->getValueType(0), Tmp1, Tmp2,
Tmp3, Tmp4, Node->getOperand(4));
}
break;
}
break;
} else {