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The first patch of X86 support for read cycle counter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24429 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1168,6 +1168,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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if (Tmp1 != Node->getOperand(0))
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Result = DAG.getNode(ISD::READCYCLECOUNTER, MVT::i64, Tmp1);
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break;
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case ISD::TRUNCSTORE:
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Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
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Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the pointer.
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@ -3336,6 +3337,17 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
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Hi = DAG.getConstant(0, NVT);
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break;
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}
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case ISD::READCYCLECOUNTER:
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if (TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) == TargetLowering::Custom) {
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SDOperand Chain = LegalizeOp(Node->getOperand(0));
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AddLegalizedOperand(SDOperand(Node, 1), Chain);
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SDOperand t = TLI.LowerOperation(Op, DAG);
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ExpandOp(t, Lo, Hi);
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} else
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assert(0 && "Must custom expand ReadCycleCounter");
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break;
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// These operators cannot be expanded directly, emit them as calls to
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// library functions.
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case ISD::FP_TO_SINT:
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