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-rw-r--r--llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index aadfa264203..a3dd36e2880 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2955,8 +2955,10 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node,
Results.push_back(DAG.getConstant(0, MVT::i32));
Results.push_back(Node->getOperand(0));
break;
+ case ISD::ATOMIC_FENCE:
case ISD::MEMBARRIER: {
// If the target didn't lower this, lower it to '__sync_synchronize()' call
+ // FIXME: handle "fence singlethread" more efficiently.
TargetLowering::ArgListTy Args;
std::pair<SDValue, SDValue> CallResult =
TLI.LowerCallTo(Node->getOperand(0), Type::getVoidTy(*DAG.getContext()),
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