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

llvm-svn: 202953
diff --git a/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
index fa8902c..286f969 100644
--- a/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
@@ -213,8 +213,8 @@
   DataFlowSanitizer(StringRef ABIListFile = StringRef(),
                     void *(*getArgTLS)() = 0, void *(*getRetValTLS)() = 0);
   static char ID;
-  bool doInitialization(Module &M);
-  bool runOnModule(Module &M);
+  bool doInitialization(Module &M) override;
+  bool runOnModule(Module &M) override;
 };
 
 struct DFSanFunction {