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Allow target to custom lower READCYCLECOUNTER (when it doesn't have to be expanded).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32016 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-11-29 08:26:18 +00:00
parent b27c480d84
commit f0b3ba6752
1 changed files with 10 additions and 2 deletions
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12
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1847,11 +1847,19 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case ISD::READCYCLECOUNTER: case ISD::READCYCLECOUNTER:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain
Result = DAG.UpdateNodeOperands(Result, Tmp1); Result = DAG.UpdateNodeOperands(Result, Tmp1);
switch (TLI.getOperationAction(ISD::READCYCLECOUNTER,
Node->getValueType(0))) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Legal: break;
case TargetLowering::Custom:
Result = TLI.LowerOperation(Result, DAG);
break;
}
// Since rdcc produce two values, make sure to remember that we legalized // Since rdcc produce two values, make sure to remember that we legalized
// both of them. // both of them.
AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0)); AddLegalizedOperand(SDOperand(Node, 0), LegalizeOp(Result.getValue(0)));
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1)); AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Result.getValue(1)));
return Result; return Result;
case ISD::SELECT: case ISD::SELECT: