[NFC] Add 'override' keyword where missing in include/ and lib/.

This fixes warnings raised by Clang's new -Wsuggest-override, in preparation for enabling that warning in the LLVM build. This patch also removes the virtual keyword where redundant, but only in places where doing so improves consistency within a given file. It also removes a couple unnecessary virtual destructor declarations in derived classes where the destructor inherited from the base class is already virtual.

Differential Revision: https://reviews.llvm.org/D83709

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp b/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
index 8cdb4d6..b10deee 100644
--- a/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
+++ b/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
@@ -33,7 +33,7 @@ struct UnifyLoopExits : public FunctionPass {
     initializeUnifyLoopExitsPass(*PassRegistry::getPassRegistry());
   }
 
-  void getAnalysisUsage(AnalysisUsage &AU) const {
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequiredID(LowerSwitchID);
     AU.addRequired<LoopInfoWrapperPass>();
     AU.addRequired<DominatorTreeWrapperPass>();
@@ -42,7 +42,7 @@ struct UnifyLoopExits : public FunctionPass {
     AU.addPreserved<DominatorTreeWrapperPass>();
   }
 
-  bool runOnFunction(Function &F);
+  bool runOnFunction(Function &F) override;
 };
 } // namespace