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The first patch of X86 support for read cycle counter

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llvm-svn: 24429
This commit is contained in:
Andrew Lenharth 2005-11-20 21:32:07 +00:00
parent c830542c70
commit b44263313a
1 changed files with 12 additions and 0 deletions
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12
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1168,6 +1168,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
if (Tmp1 != Node->getOperand(0))
Result = DAG.getNode(ISD::READCYCLECOUNTER, MVT::i64, Tmp1);
break;
case ISD::TRUNCSTORE:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the pointer.
@ -3336,6 +3337,17 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
Hi = DAG.getConstant(0, NVT);
break;
}
case ISD::READCYCLECOUNTER:
if (TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) == TargetLowering::Custom) {
SDOperand Chain = LegalizeOp(Node->getOperand(0));
AddLegalizedOperand(SDOperand(Node, 1), Chain);
SDOperand t = TLI.LowerOperation(Op, DAG);
ExpandOp(t, Lo, Hi);
} else
assert(0 && "Must custom expand ReadCycleCounter");
break;
// These operators cannot be expanded directly, emit them as calls to
// library functions.
case ISD::FP_TO_SINT: