[C++11] Add 'override' keyword to virtual methods that override their base class.

llvm-svn: 203339
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index eac5512..9a9062a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5674,7 +5674,7 @@
   SDNode::use_iterator &UI;
   SDNode::use_iterator &UE;
 
-  virtual void NodeDeleted(SDNode *N, SDNode *E) {
+  void NodeDeleted(SDNode *N, SDNode *E) override {
     // Increment the iterator as needed.
     while (UI != UE && N == *UI)
       ++UI;