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

llvm-svn: 203220
diff --git a/llvm/lib/CodeGen/ExecutionDepsFix.cpp b/llvm/lib/CodeGen/ExecutionDepsFix.cpp
index b31b029..a08eb6b5 100644
--- a/llvm/lib/CodeGen/ExecutionDepsFix.cpp
+++ b/llvm/lib/CodeGen/ExecutionDepsFix.cpp
@@ -155,14 +155,14 @@
   ExeDepsFix(const TargetRegisterClass *rc)
     : MachineFunctionPass(ID), RC(rc), NumRegs(RC->getNumRegs()) {}
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.setPreservesAll();
     MachineFunctionPass::getAnalysisUsage(AU);
   }
 
-  virtual bool runOnMachineFunction(MachineFunction &MF);
+  bool runOnMachineFunction(MachineFunction &MF) override;
 
-  virtual const char *getPassName() const {
+  const char *getPassName() const override {
     return "Execution dependency fix";
   }