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Avoid inifinite looping if READCYCLECOUNTER isn't custom lowered. 

llvm-svn: 32022
This commit is contained in:
Evan Cheng 2006-11-29 19:13:47 +00:00
parent 01b74b6f7b
commit a743fada65
1 changed files with 8 additions and 3 deletions
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11
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1850,16 +1850,21 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
switch (TLI.getOperationAction(ISD::READCYCLECOUNTER,
Node->getValueType(0))) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Legal: break;
case TargetLowering::Legal:
Tmp1 = Result.getValue(0);
Tmp2 = Result.getValue(1);
break;
case TargetLowering::Custom:
Result = TLI.LowerOperation(Result, DAG);
Tmp1 = LegalizeOp(Result.getValue(0));
Tmp2 = LegalizeOp(Result.getValue(1));
break;
}
// Since rdcc produce two values, make sure to remember that we legalized
// both of them.
AddLegalizedOperand(SDOperand(Node, 0), LegalizeOp(Result.getValue(0)));
AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Result.getValue(1)));
AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
return Result;
case ISD::SELECT: