don't add flag nodes with chain results to the NowDeadNodes
list multiple times when MorphNodeTo can't be applied.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99735 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 6c22262..600557e 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1614,8 +1614,9 @@
CurDAG->ReplaceAllUsesOfValueWith(SDValue(FRN, FRN->getNumValues()-1),
InputFlag, &ISU);
- // If the node became dead, delete it.
- if (FRN->use_empty())
+ // If the node became dead and we haven't already seen it, delete it.
+ if (FRN->use_empty() &&
+ !std::count(NowDeadNodes.begin(), NowDeadNodes.end(), FRN))
NowDeadNodes.push_back(FRN);
}
}