Make sure to expand all nodes, avoiding unintentional node duplication.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21889 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index b8c4315..5cc148a 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2168,6 +2168,13 @@
TargetLowering::ArgListTy Args;
const Type *ArgTy = MVT::getTypeForValueType(Source.getValueType());
+
+ // Expand the source, then glue it back together for the call. We must expand
+ // the source in case it is shared (this pass of legalize must traverse it).
+ SDOperand SrcLo, SrcHi;
+ ExpandOp(Source, SrcLo, SrcHi);
+ Source = DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), SrcLo, SrcHi);
+
Args.push_back(std::make_pair(Source, ArgTy));
// We don't care about token chains for libcalls. We just use the entry