clarify a comment, thanks Duncan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46313 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 6ce29fb..fc393e9 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -607,8 +607,9 @@
AddToWorkList(RV.Val);
AddUsersToWorkList(RV.Val);
- // Add any uses of the old node to the worklist if they have a single
- // use. They may be dead after this node is deleted.
+ // Add any uses of the old node to the worklist in case this node is the
+ // last one that uses them. They may become dead after this node is
+ // deleted.
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
AddToWorkList(N->getOperand(i).Val);