1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index d6b2b5b06b1..498e6fdcc7a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -643,6 +643,16 @@ public:
   }
 };
 
+class WorklistInserter : public SelectionDAG::DAGUpdateListener {
+  DAGCombiner &DC;
+
+public:
+  explicit WorklistInserter(DAGCombiner &dc)
+      : SelectionDAG::DAGUpdateListener(dc.getDAG()), DC(dc) {}
+
+  void NodeInserted(SDNode *N) override { DC.AddToWorklist(N); }
+};
+
 } // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
@@ -1395,6 +1405,8 @@ void DAGCombiner::Run(CombineLevel AtLevel) {
   LegalOperations = Level >= AfterLegalizeVectorOps;
   LegalTypes = Level >= AfterLegalizeTypes;
 
+  WorklistInserter AddNodes(*this);
+
   // Add all the dag nodes to the worklist.
   for (SDNode &Node : DAG.allnodes())
     AddToWorklist(&Node);