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Allow target to custom lower READCYCLECOUNTER (when it doesn't have to be expanded).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32016 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1847,11 +1847,19 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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case ISD::READCYCLECOUNTER:
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Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain
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Result = DAG.UpdateNodeOperands(Result, Tmp1);
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switch (TLI.getOperationAction(ISD::READCYCLECOUNTER,
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Node->getValueType(0))) {
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default: assert(0 && "This action is not supported yet!");
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case TargetLowering::Legal: break;
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case TargetLowering::Custom:
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Result = TLI.LowerOperation(Result, DAG);
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break;
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}
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// Since rdcc produce two values, make sure to remember that we legalized
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// both of them.
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AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
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AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
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AddLegalizedOperand(SDOperand(Node, 0), LegalizeOp(Result.getValue(0)));
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AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Result.getValue(1)));
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return Result;
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case ISD::SELECT:
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