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/lib/CodeGen/AggressiveAntiDepBreaker.h b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.h
index 12cf95b..f9544dd 100644
--- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.h
+++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.h
@@ -127,7 +127,7 @@
     AggressiveAntiDepBreaker(MachineFunction& MFi,
                           const RegisterClassInfo &RCI,
                           TargetSubtargetInfo::RegClassVector& CriticalPathRCs);
-    ~AggressiveAntiDepBreaker();
+    ~AggressiveAntiDepBreaker() override;
 
     /// Initialize anti-dep breaking for a new basic block.
     void StartBlock(MachineBasicBlock *BB) override;