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

llvm-svn: 203220
diff --git a/llvm/lib/CodeGen/ProcessImplicitDefs.cpp b/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
index 0c5173a..a0d3416 100644
--- a/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
+++ b/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
@@ -41,9 +41,9 @@
     initializeProcessImplicitDefsPass(*PassRegistry::getPassRegistry());
   }
 
-  virtual void getAnalysisUsage(AnalysisUsage &au) const;
+  void getAnalysisUsage(AnalysisUsage &au) const override;
 
-  virtual bool runOnMachineFunction(MachineFunction &fn);
+  bool runOnMachineFunction(MachineFunction &fn) override;
 };
 } // end anonymous namespace