Use 'override/final' instead of 'virtual' for overridden methods

The patch is generated using clang-tidy misc-use-override check.

This command was used:

  tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py \
    -checks='-*,misc-use-override' -header-filter='llvm|clang' \
    -j=32 -fix -format

http://reviews.llvm.org/D8925

llvm-svn: 234679
diff --git a/llvm/unittests/Transforms/Utils/Cloning.cpp b/llvm/unittests/Transforms/Utils/Cloning.cpp
index 49e798b..b2f71c9 100644
--- a/llvm/unittests/Transforms/Utils/Cloning.cpp
+++ b/llvm/unittests/Transforms/Utils/Cloning.cpp
@@ -31,9 +31,7 @@
 
 class CloneInstruction : public ::testing::Test {
 protected:
-  virtual void SetUp() {
-    V = nullptr;
-  }
+  void SetUp() override { V = nullptr; }
 
   template <typename T>
   T *clone(T *V1) {
@@ -47,7 +45,7 @@
     DeleteContainerPointers(Clones);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     eraseClones();
     DeleteContainerPointers(Orig);
     delete V;
@@ -206,16 +204,14 @@
 
 class CloneFunc : public ::testing::Test {
 protected:
-  virtual void SetUp() {
+  void SetUp() override {
     SetupModule();
     CreateOldFunc();
     CreateNewFunc();
     SetupFinder();
   }
 
-  virtual void TearDown() {
-    delete Finder;
-  }
+  void TearDown() override { delete Finder; }
 
   void SetupModule() {
     M = new Module("", C);