[C++11] Add 'override' keywords and remove 'virtual'. Additionally add 'final' and leave 'virtual' on some methods that are marked virtual without overriding anything and have no obvious overrides themselves.

llvm-svn: 207511
diff --git a/llvm/lib/Target/CppBackend/CPPBackend.cpp b/llvm/lib/Target/CppBackend/CPPBackend.cpp
index f16547a..fbb34ed 100644
--- a/llvm/lib/Target/CppBackend/CPPBackend.cpp
+++ b/llvm/lib/Target/CppBackend/CPPBackend.cpp
@@ -108,9 +108,9 @@
     explicit CppWriter(formatted_raw_ostream &o) :
       ModulePass(ID), Out(o), uniqueNum(0), is_inline(false), indent_level(0){}
 
-    virtual const char *getPassName() const { return "C++ backend"; }
+    const char *getPassName() const override { return "C++ backend"; }
 
-    bool runOnModule(Module &M);
+    bool runOnModule(Module &M) override;
 
     void printProgram(const std::string& fname, const std::string& modName );
     void printModule(const std::string& fname, const std::string& modName );
diff --git a/llvm/lib/Target/CppBackend/CPPTargetMachine.h b/llvm/lib/Target/CppBackend/CPPTargetMachine.h
index ee39f2a..673ade7 100644
--- a/llvm/lib/Target/CppBackend/CPPTargetMachine.h
+++ b/llvm/lib/Target/CppBackend/CPPTargetMachine.h
@@ -28,14 +28,12 @@
                    CodeGenOpt::Level OL)
     : TargetMachine(T, TT, CPU, FS, Options) {}
 
-  virtual bool addPassesToEmitFile(PassManagerBase &PM,
-                                   formatted_raw_ostream &Out,
-                                   CodeGenFileType FileType,
-                                   bool DisableVerify,
-                                   AnalysisID StartAfter,
-                                   AnalysisID StopAfter);
+  bool addPassesToEmitFile(PassManagerBase &PM, formatted_raw_ostream &Out,
+                           CodeGenFileType FileType, bool DisableVerify,
+                           AnalysisID StartAfter,
+                           AnalysisID StopAfter) override;
 
-  virtual const DataLayout *getDataLayout() const { return nullptr; }
+  const DataLayout *getDataLayout() const override { return nullptr; }
 };
 
 extern Target TheCppBackendTarget;