Fix Clang-tidy misc-use-override warnings, other minor fixes

Patch by Eugene Zelenko!

Differential Revision: http://reviews.llvm.org/D12741

llvm-svn: 247218
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
index a0b3ee5..572fd19 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -59,7 +59,7 @@
   virtual const VarDecl *getThreadIDVariable() const = 0;
 
   /// \brief Emit the captured statement body.
-  virtual void EmitBody(CodeGenFunction &CGF, const Stmt *S) override;
+  void EmitBody(CodeGenFunction &CGF, const Stmt *S) override;
 
   /// \brief Get an LValue for the current ThreadID variable.
   /// \return LValue for thread id variable. This LValue always has type int32*.
@@ -156,7 +156,7 @@
       return OuterRegionInfo->getContextValue();
     llvm_unreachable("No context value for inlined OpenMP region");
   }
-  virtual void setContextValue(llvm::Value *V) override {
+  void setContextValue(llvm::Value *V) override {
     if (OuterRegionInfo) {
       OuterRegionInfo->setContextValue(V);
       return;
@@ -229,7 +229,7 @@
   }
 };
 
-} // namespace
+} // anonymous namespace
 
 LValue CGOpenMPRegionInfo::getThreadIDVariableLValue(CodeGenFunction &CGF) {
   return CGF.MakeNaturalAlignAddrLValue(
@@ -1283,7 +1283,7 @@
     CGF.EmitRuntimeCall(Callee, Args);
   }
 };
-} // namespace
+} // anonymous namespace
 
 void CGOpenMPRuntime::emitCriticalRegion(CodeGenFunction &CGF,
                                          StringRef CriticalName,
@@ -1831,7 +1831,7 @@
   /// \brief Function with call of destructors for private variables.
   KmpTaskTDestructors,
 };
-} // namespace
+} // anonymous namespace
 
 void CGOpenMPRuntime::emitKmpRoutineEntryT(QualType KmpInt32Ty) {
   if (!KmpRoutineEntryPtrTy) {
@@ -1866,7 +1866,7 @@
   const VarDecl *PrivateElemInit;
 };
 typedef std::pair<CharUnits /*Align*/, PrivateHelpersTy> PrivateDataTy;
-} // namespace
+} // anonymous namespace
 
 static RecordDecl *
 createPrivatesRecordDecl(CodeGenModule &CGM,
@@ -2910,4 +2910,3 @@
     }
   }
 }
-
diff --git a/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp b/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
index 54a3830..a850c5a 100644
--- a/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
+++ b/clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
@@ -30,6 +30,7 @@
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/TargetRegistry.h"
 #include <memory>
+
 using namespace clang;
 
 #define DEBUG_TYPE "pchcontainer"
@@ -139,7 +140,7 @@
     CodeGenOpts.SplitDwarfFile = OutputFileName;
   }
 
-  virtual ~PCHContainerGenerator() {}
+  ~PCHContainerGenerator() override = default;
 
   void Initialize(ASTContext &Context) override {
     assert(!Ctx && "initialized multiple times");
@@ -254,7 +255,7 @@
   }
 };
 
-} // namespace
+} // anonymous namespace
 
 std::unique_ptr<ASTConsumer>
 ObjectFilePCHContainerWriter::CreatePCHContainerGenerator(
@@ -290,5 +291,4 @@
   // As a fallback, treat the buffer as a raw AST.
   StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
                   (const unsigned char *)Buffer.getBufferEnd());
-  return;
 }