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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202945 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/LazyValueInfo.cpp

@@ -302,9 +302,9 @@ namespace {
       
     LVIValueHandle(Value *V, LazyValueInfoCache *P)
       : CallbackVH(V), Parent(P) { }
-      
-    void deleted();
-    void allUsesReplacedWith(Value *V) {
+
+    void deleted() override;
+    void allUsesReplacedWith(Value *V) override {
       deleted();
     }
   };