Index: lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -20662,11 +20662,11 @@
   SDValue TF = DAG.getTokenFactor(SDLoc(STChain), TFOps);
   CombineTo(St, TF);
 
-  AddToWorklist(STChain);
   // Add TF operands worklist in reverse order.
-  for (auto I = TF->getNumOperands(); I;)
-    AddToWorklist(TF->getOperand(--I).getNode());
   AddToWorklist(TF.getNode());
+  for (const SDValue &Op : TF->ops())
+    AddToWorklist(Op.getNode());
+  AddToWorklist(STChain);
   return true;
 }