commit 14648468011c92a4210f8118721d58c25043daf8
author Eli Friedman <eli.friedman@gmail.com> Wed Jul 27 22:21:52 2011 +0000
committer Eli Friedman <eli.friedman@gmail.com> Wed Jul 27 22:21:52 2011 +0000
tree 287882ae779b0bd87f8e9a7996fae00d99785a59
parent 144da2c8f03834e76ddb617498be7ed864a5c192

Code generation for 'fence' instruction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136283 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index aadfa26..a3dd36e 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2955,8 +2955,10 @@
     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()),