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ISD::MEMBARRIER should lower to a libcall (__sync_synchronize) if the target

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sets the legalize action to Expand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106203 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-06-17 02:00:53 +00:00
parent 477bf62048
commit bbfc0d22a9
1 changed files with 13 additions and 1 deletions
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14
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -2359,10 +2359,22 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node,
case ISD::EH_RETURN:
case ISD::EH_LABEL:
case ISD::PREFETCH:
case ISD::MEMBARRIER:
case ISD::VAEND:
Results.push_back(Node->getOperand(0));
break;
case ISD::MEMBARRIER: {
// If the target didn't lower this, lower it to '__sync_synchronize()' call
TargetLowering::ArgListTy Args;
std::pair<SDValue, SDValue> CallResult =
TLI.LowerCallTo(Node->getOperand(0), Type::getVoidTy(*DAG.getContext()),
false, false, false, false, 0, CallingConv::C, false,
/*isReturnValueUsed=*/true,
DAG.getExternalSymbol("__sync_synchronize",
TLI.getPointerTy()),
Args, DAG, dl);
Results.push_back(CallResult.second);
break;
}
case ISD::DYNAMIC_STACKALLOC:
ExpandDYNAMIC_STACKALLOC(Node, Results);
break;