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

llvm-svn: 203220
diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index 738b1e6..1bd75f7 100644
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -246,12 +246,12 @@
         initializeMachineVerifierPassPass(*PassRegistry::getPassRegistry());
       }
 
-    void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesAll();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
-    bool runOnMachineFunction(MachineFunction &MF) {
+    bool runOnMachineFunction(MachineFunction &MF) override {
       MF.verify(this, Banner);
       return false;
     }