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

[alexfh]

Summary

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

[craig.topper]

A lot of these seem to be destructors. Do we really want override on
destructors? It's sort of implicit when the class isn't a base class.

[alexfh]

In D8925#153913, @craig.topper wrote:

A lot of these seem to be destructors. Do we really want override on
destructors? It's sort of implicit when the class isn't a base class.

Destructors are not much different from other methods in this regard: when you forget to specify virtual on the base class destructor, override on the derived one's will make compiler complain. Without override the code will compile fine, but will do something wrong.

[alexfh]

svn diff | clang-format-diff -i

[alexfh]

oops, wrong patch name supplied to arc, reverting to the original patch.

[alexfh]

Recreated the patch using:

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

[echristo]

For the record, this is awesome and we should totally do this.

-eric

[dblaikie]

Sounds good to me.

This shouldn't really hurt blame any more than the existing transformations Ben did to add 'override' in the first place, so I don't see any disadvantage to this.

[alexfh]

Committed revision 234679.

examples/ExceptionDemo/ExceptionDemo.cpp

public:
   OurCppRunException (const OurCppRunException &toCopy) :
   std::runtime_error(toCopy) {}
 
   OurCppRunException &operator = (const OurCppRunException &toCopy) {
     return(reinterpret_cast<OurCppRunException&>(
                                  std::runtime_error::operator=(toCopy)));
   }
 
-  virtual ~OurCppRunException (void) throw () {}
+  ~OurCppRunException(void) throw() override {}
 };
 } // end anonymous namespace
 
 /// Throws foreign C++ exception.
 /// @param ignoreIt unused parameter that allows function to match implied
 ///        generated function contract.
 extern "C"
 void throwCppException (int32_t ignoreIt) {

examples/Kaleidoscope/Chapter3/toy.cpp

public:
   virtual Value *Codegen() = 0;
 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs) 
     : Op(op), LHS(lhs), RHS(rhs) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST*> Args;
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST*> &args)
     : Callee(callee), Args(args) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its name, and its argument names (thus implicitly the number
 /// of arguments the function takes).
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;

examples/Kaleidoscope/Chapter4/toy.cpp

 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs)
       : Op(op), LHS(lhs), RHS(rhs) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST *> Args;
 
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST *> &args)
       : Callee(callee), Args(args) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its name, and its argument names (thus implicitly the number
 /// of arguments the function takes).
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;

 };
 
 class HelpingMemoryManager : public SectionMemoryManager {
   HelpingMemoryManager(const HelpingMemoryManager &) = delete;
   void operator=(const HelpingMemoryManager &) = delete;
 
 public:
   HelpingMemoryManager(MCJITHelper *Helper) : MasterHelper(Helper) {}
-  virtual ~HelpingMemoryManager() {}
+  ~HelpingMemoryManager() override {}
 
   /// This method returns the address of the specified symbol.
   /// Our implementation will attempt to find symbols in other
   /// modules associated with the MCJITHelper to cross link symbols
   /// from one generated module to another.
-  virtual uint64_t getSymbolAddress(const std::string &Name) override;
+  uint64_t getSymbolAddress(const std::string &Name) override;
 
 private:
   MCJITHelper *MasterHelper;
 };
 
 uint64_t HelpingMemoryManager::getSymbolAddress(const std::string &Name) {
   uint64_t FnAddr = SectionMemoryManager::getSymbolAddress(Name);
   if (FnAddr)

examples/Kaleidoscope/Chapter5/toy.cpp

 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs)
       : Op(op), LHS(lhs), RHS(rhs) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST *> Args;
 
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST *> &args)
       : Callee(callee), Args(args) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// IfExprAST - Expression class for if/then/else.
 class IfExprAST : public ExprAST {
   ExprAST *Cond, *Then, *Else;
 
 public:
   IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else)
       : Cond(cond), Then(then), Else(_else) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// ForExprAST - Expression class for for/in.
 class ForExprAST : public ExprAST {
   std::string VarName;
   ExprAST *Start, *End, *Step, *Body;
 
 public:
   ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end,
              ExprAST *step, ExprAST *body)
       : VarName(varname), Start(start), End(end), Step(step), Body(body) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its name, and its argument names (thus implicitly the number
 /// of arguments the function takes).
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;

examples/Kaleidoscope/Chapter6/toy.cpp

 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// UnaryExprAST - Expression class for a unary operator.
 class UnaryExprAST : public ExprAST {
   char Opcode;
   ExprAST *Operand;
 
 public:
   UnaryExprAST(char opcode, ExprAST *operand)
       : Opcode(opcode), Operand(operand) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs)
       : Op(op), LHS(lhs), RHS(rhs) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST *> Args;
 
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST *> &args)
       : Callee(callee), Args(args) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// IfExprAST - Expression class for if/then/else.
 class IfExprAST : public ExprAST {
   ExprAST *Cond, *Then, *Else;
 
 public:
   IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else)
       : Cond(cond), Then(then), Else(_else) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// ForExprAST - Expression class for for/in.
 class ForExprAST : public ExprAST {
   std::string VarName;
   ExprAST *Start, *End, *Step, *Body;
 
 public:
   ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end,
              ExprAST *step, ExprAST *body)
       : VarName(varname), Start(start), End(end), Step(step), Body(body) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its name, and its argument names (thus implicitly the number
 /// of arguments the function takes), as well as if it is an operator.
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;

examples/Kaleidoscope/Chapter7/toy.cpp

 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
   const std::string &getName() const { return Name; }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// UnaryExprAST - Expression class for a unary operator.
 class UnaryExprAST : public ExprAST {
   char Opcode;
   ExprAST *Operand;
 
 public:
   UnaryExprAST(char opcode, ExprAST *operand)
       : Opcode(opcode), Operand(operand) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs)
       : Op(op), LHS(lhs), RHS(rhs) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST *> Args;
 
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST *> &args)
       : Callee(callee), Args(args) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// IfExprAST - Expression class for if/then/else.
 class IfExprAST : public ExprAST {
   ExprAST *Cond, *Then, *Else;
 
 public:
   IfExprAST(ExprAST *cond, ExprAST *then, ExprAST *_else)
       : Cond(cond), Then(then), Else(_else) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// ForExprAST - Expression class for for/in.
 class ForExprAST : public ExprAST {
   std::string VarName;
   ExprAST *Start, *End, *Step, *Body;
 
 public:
   ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end,
              ExprAST *step, ExprAST *body)
       : VarName(varname), Start(start), End(end), Step(step), Body(body) {}
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VarExprAST - Expression class for var/in
 class VarExprAST : public ExprAST {
   std::vector<std::pair<std::string, ExprAST *> > VarNames;
   ExprAST *Body;
 
 public:
   VarExprAST(const std::vector<std::pair<std::string, ExprAST *> > &varnames,
              ExprAST *body)
       : VarNames(varnames), Body(body) {}
 
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its argument names as well as if it is an operator.
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;
   bool isOperator;

examples/Kaleidoscope/Chapter8/toy.cpp

 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
 
 public:
   NumberExprAST(double val) : Val(val) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     return ExprAST::dump(out << Val, ind);
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
 
 public:
   VariableExprAST(SourceLocation Loc, const std::string &name)
       : ExprAST(Loc), Name(name) {}
   const std::string &getName() const { return Name; }
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     return ExprAST::dump(out << Name, ind);
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// UnaryExprAST - Expression class for a unary operator.
 class UnaryExprAST : public ExprAST {
   char Opcode;
   ExprAST *Operand;
 
 public:
   UnaryExprAST(char opcode, ExprAST *operand)
       : Opcode(opcode), Operand(operand) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "unary" << Opcode, ind);
     Operand->dump(out, ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
   char Op;
   ExprAST *LHS, *RHS;
 
 public:
   BinaryExprAST(SourceLocation Loc, char op, ExprAST *lhs, ExprAST *rhs)
       : ExprAST(Loc), Op(op), LHS(lhs), RHS(rhs) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "binary" << Op, ind);
     LHS->dump(indent(out, ind) << "LHS:", ind + 1);
     RHS->dump(indent(out, ind) << "RHS:", ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// CallExprAST - Expression class for function calls.
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<ExprAST *> Args;
 
 public:
   CallExprAST(SourceLocation Loc, const std::string &callee,
               std::vector<ExprAST *> &args)
       : ExprAST(Loc), Callee(callee), Args(args) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "call " << Callee, ind);
     for (ExprAST *Arg : Args)
       Arg->dump(indent(out, ind + 1), ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// IfExprAST - Expression class for if/then/else.
 class IfExprAST : public ExprAST {
   ExprAST *Cond, *Then, *Else;
 
 public:
   IfExprAST(SourceLocation Loc, ExprAST *cond, ExprAST *then, ExprAST *_else)
       : ExprAST(Loc), Cond(cond), Then(then), Else(_else) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "if", ind);
     Cond->dump(indent(out, ind) << "Cond:", ind + 1);
     Then->dump(indent(out, ind) << "Then:", ind + 1);
     Else->dump(indent(out, ind) << "Else:", ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// ForExprAST - Expression class for for/in.
 class ForExprAST : public ExprAST {
   std::string VarName;
   ExprAST *Start, *End, *Step, *Body;
 
 public:
   ForExprAST(const std::string &varname, ExprAST *start, ExprAST *end,
              ExprAST *step, ExprAST *body)
       : VarName(varname), Start(start), End(end), Step(step), Body(body) {}
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "for", ind);
     Start->dump(indent(out, ind) << "Cond:", ind + 1);
     End->dump(indent(out, ind) << "End:", ind + 1);
     Step->dump(indent(out, ind) << "Step:", ind + 1);
     Body->dump(indent(out, ind) << "Body:", ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// VarExprAST - Expression class for var/in
 class VarExprAST : public ExprAST {
   std::vector<std::pair<std::string, ExprAST *> > VarNames;
   ExprAST *Body;
 
 public:
   VarExprAST(const std::vector<std::pair<std::string, ExprAST *> > &varnames,
              ExprAST *body)
       : VarNames(varnames), Body(body) {}
 
-  virtual std::ostream &dump(std::ostream &out, int ind) {
+  std::ostream &dump(std::ostream &out, int ind) override {
     ExprAST::dump(out << "var", ind);
     for (const auto &NamedVar : VarNames)
       NamedVar.second->dump(indent(out, ind) << NamedVar.first << ':', ind + 1);
     Body->dump(indent(out, ind) << "Body:", ind + 1);
     return out;
   }
-  virtual Value *Codegen();
+  Value *Codegen() override;
 };
 
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its argument names as well as if it is an operator.
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;
   bool isOperator;

include/llvm/Analysis/AssumptionCache.h

 public:
   /// \brief Get the cached assumptions for a function.
   ///
   /// If no assumptions are cached, this will scan the function. Otherwise, the
   /// existing cache will be returned.
   AssumptionCache &getAssumptionCache(Function &F);
 
   AssumptionCacheTracker();
-  ~AssumptionCacheTracker();
+  ~AssumptionCacheTracker() override;
 
   void releaseMemory() override { AssumptionCaches.shrink_and_clear(); }
 
   void verifyAnalysis() const override;
   bool doFinalization(Module &) override {
     verifyAnalysis();
     return false;
   }
 
   static char ID; // Pass identification, replacement for typeid
 };
 
 } // end namespace llvm
 
 #endif

include/llvm/Analysis/BlockFrequencyInfo.h

class BlockFrequencyInfo : public FunctionPass {
   typedef BlockFrequencyInfoImpl<BasicBlock> ImplType;
   std::unique_ptr<ImplType> BFI;
 
 public:
   static char ID;
 
   BlockFrequencyInfo();
 
-  ~BlockFrequencyInfo();
+  ~BlockFrequencyInfo() override;
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 
   bool runOnFunction(Function &F) override;
   void releaseMemory() override;
   void print(raw_ostream &O, const Module *M) const override;
   const Function *getFunction() const;
   void view() const;

include/llvm/Analysis/CallGraph.h

 /// which is stored internally for each module.
 class CallGraphWrapperPass : public ModulePass {
   std::unique_ptr<CallGraph> G;
 
 public:
   static char ID; // Class identification, replacement for typeinfo
 
   CallGraphWrapperPass();
-  virtual ~CallGraphWrapperPass();
+  ~CallGraphWrapperPass() override;
 
   /// \brief The internal \c CallGraph around which the rest of this interface
   /// is wrapped.
   const CallGraph &getCallGraph() const { return *G; }
   CallGraph &getCallGraph() { return *G; }
 
   typedef CallGraph::iterator iterator;
   typedef CallGraph::const_iterator const_iterator;

include/llvm/Analysis/DependenceAnalysis.h

namespace llvm {
   /// it is not a confused dependence (see Dependence). In most cases
   /// (for output, flow, and anti dependences), the dependence implies an
   /// ordering, where the source must precede the destination; in contrast,
   /// input dependences are unordered.
   class FullDependence : public Dependence {
   public:
     FullDependence(Instruction *Src, Instruction *Dst, bool LoopIndependent,
                    unsigned Levels);
-    ~FullDependence() { delete[] DV; }
+    ~FullDependence() override { delete[] DV; }
 
     /// isLoopIndependent - Returns true if this is a loop-independent
     /// dependence.
     bool isLoopIndependent() const override { return LoopIndependent; }
 
     /// isConfused - Returns true if this dependence is confused
     /// (the compiler understands nothing and makes worst-case
     /// assumptions).

include/llvm/Analysis/InlineCost.h

 class InlineCostAnalysis : public CallGraphSCCPass {
   TargetTransformInfoWrapperPass *TTIWP;
   AssumptionCacheTracker *ACT;
 
 public:
   static char ID;
 
   InlineCostAnalysis();
-  ~InlineCostAnalysis();
+  ~InlineCostAnalysis() override;
 
   // Pass interface implementation.
   void getAnalysisUsage(AnalysisUsage &AU) const override;
   bool runOnSCC(CallGraphSCC &SCC) override;
 
   /// \brief Get an InlineCost object representing the cost of inlining this
   /// callsite.
   ///

include/llvm/Analysis/JumpInstrTableInfo.h

 /// for the jump-instruction tables.
 class JumpInstrTableInfo : public ImmutablePass {
 public:
   static char ID;
 
   /// The default byte alignment for jump tables is 16, which is large but
   /// usually safe.
   JumpInstrTableInfo(uint64_t ByteAlign = 16);
-  virtual ~JumpInstrTableInfo();
+  ~JumpInstrTableInfo() override;
   const char *getPassName() const override {
     return "Jump-Instruction Table Info";
   }
 
   typedef std::pair<Function *, Function *> JumpPair;
   typedef DenseMap<FunctionType *, std::vector<JumpPair> > JumpTables;
 
   /// Inserts an entry in a table, adding the table if it doesn't exist.

include/llvm/Analysis/LazyValueInfo.h

class LazyValueInfo : public FunctionPass {
   void *PImpl;
   LazyValueInfo(const LazyValueInfo&) = delete;
   void operator=(const LazyValueInfo&) = delete;
 public:
   static char ID;
   LazyValueInfo() : FunctionPass(ID), PImpl(nullptr) {
     initializeLazyValueInfoPass(*PassRegistry::getPassRegistry());
   }
-  ~LazyValueInfo() { assert(!PImpl && "releaseMemory not called"); }
+  ~LazyValueInfo() override { assert(!PImpl && "releaseMemory not called"); }
 
   /// This is used to return true/false/dunno results.
   enum Tristate {
     Unknown = -1, False = 0, True = 1
   };
   
   
   // Public query interface.

include/llvm/Analysis/LibCallAliasAnalysis.h

struct LibCallAliasAnalysis : public FunctionPass, public AliasAnalysis {
     explicit LibCallAliasAnalysis(LibCallInfo *LC = nullptr)
         : FunctionPass(ID), LCI(LC) {
       initializeLibCallAliasAnalysisPass(*PassRegistry::getPassRegistry());
     }
     explicit LibCallAliasAnalysis(char &ID, LibCallInfo *LC)
         : FunctionPass(ID), LCI(LC) {
       initializeLibCallAliasAnalysisPass(*PassRegistry::getPassRegistry());
     }
-    ~LibCallAliasAnalysis();
-    
+    ~LibCallAliasAnalysis() override;
     ModRefResult getModRefInfo(ImmutableCallSite CS,
                                const Location &Loc) override;
  
     ModRefResult getModRefInfo(ImmutableCallSite CS1,
                                ImmutableCallSite CS2) override {
       // TODO: Could compare two direct calls against each other if we cared to.
       return AliasAnalysis::getModRefInfo(CS1, CS2);
     }

include/llvm/Analysis/MemoryDependenceAnalysis.h

private:
     /// Current AA implementation, just a cache.
     AliasAnalysis *AA;
     DominatorTree *DT;
     AssumptionCache *AC;
     std::unique_ptr<PredIteratorCache> PredCache;
 
   public:
     MemoryDependenceAnalysis();
-    ~MemoryDependenceAnalysis();
+    ~MemoryDependenceAnalysis() override;
     static char ID;
 
     /// Pass Implementation stuff.  This doesn't do any analysis eagerly.
     bool runOnFunction(Function &) override;
 
     /// Clean up memory in between runs
     void releaseMemory() override;
 

include/llvm/Analysis/PostDominators.h

struct PostDominatorTree : public FunctionPass {
   static char ID; // Pass identification, replacement for typeid
   DominatorTreeBase<BasicBlock>* DT;
 
   PostDominatorTree() : FunctionPass(ID) {
     initializePostDominatorTreePass(*PassRegistry::getPassRegistry());
     DT = new DominatorTreeBase<BasicBlock>(true);
   }
 
-  ~PostDominatorTree();
+  ~PostDominatorTree() override;
 
   bool runOnFunction(Function &F) override;
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.setPreservesAll();
   }
 
   inline const std::vector<BasicBlock*> &getRoots() const {

include/llvm/Analysis/RegionInfo.h

bool operator==(const RegionNode &RN) const {
     return &RN == reinterpret_cast<const RegionNode *>(this);
   }
 };
 
 class RegionInfo : public RegionInfoBase<RegionTraits<Function>> {
 public:
   explicit RegionInfo();
 
-  virtual ~RegionInfo();
+  ~RegionInfo() override;
 
   // updateStatistics - Update statistic about created regions.
   void updateStatistics(Region *R) final;
 
   void recalculate(Function &F, DominatorTree *DT, PostDominatorTree *PDT,
                    DominanceFrontier *DF);
 };
 
 class RegionInfoPass : public FunctionPass {
   RegionInfo RI;
 
 public:
   static char ID;
   explicit RegionInfoPass();
 
-  ~RegionInfoPass();
+  ~RegionInfoPass() override;
 
   RegionInfo &getRegionInfo() { return RI; }
 
   const RegionInfo &getRegionInfo() const { return RI; }
 
   /// @name FunctionPass interface
   //@{
   bool runOnFunction(Function &F) override;

include/llvm/CodeGen/AsmPrinter.h

private:
 
   /// If the target supports dwarf debug info, this pointer is non-null.
   DwarfDebug *DD;
 
 protected:
   explicit AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer);
 
 public:
-  virtual ~AsmPrinter();
+  ~AsmPrinter() override;
 
   DwarfDebug *getDwarfDebug() { return DD; }
   DwarfDebug *getDwarfDebug() const { return DD; }
 
   /// Return true if assembly output should contain comments.
   ///
   bool isVerbose() const { return VerboseAsm; }
 

include/llvm/CodeGen/LiveIntervalAnalysis.h

class LiveIntervals : public MachineFunctionPass {
 
     /// Keeps a live range set for each register unit to track fixed physreg
     /// interference.
     SmallVector<LiveRange*, 0> RegUnitRanges;
 
   public:
     static char ID; // Pass identification, replacement for typeid
     LiveIntervals();
-    virtual ~LiveIntervals();
+    ~LiveIntervals() override;
 
     // Calculate the spill weight to assign to a single instruction.
     static float getSpillWeight(bool isDef, bool isUse,
                                 const MachineBlockFrequencyInfo *MBFI,
                                 const MachineInstr *Instr);
 
     LiveInterval &getInterval(unsigned Reg) {
       if (hasInterval(Reg))

include/llvm/CodeGen/LiveRangeEdit.h

LiveRangeEdit(LiveInterval *parent, SmallVectorImpl<unsigned> &newRegs,
                 Delegate *delegate = nullptr)
       : Parent(parent), NewRegs(newRegs), MRI(MF.getRegInfo()), LIS(lis),
         VRM(vrm), TII(*MF.getSubtarget().getInstrInfo()),
         TheDelegate(delegate), FirstNew(newRegs.size()),
         ScannedRemattable(false) {
     MRI.setDelegate(this);
   }
 
-  ~LiveRangeEdit() { MRI.resetDelegate(this); }
+  ~LiveRangeEdit() override { MRI.resetDelegate(this); }
 
   LiveInterval &getParent() const {
    assert(Parent && "No parent LiveInterval");
    return *Parent;
   }
   unsigned getReg() const { return getParent().reg; }
 
   /// Iterator for accessing the new registers added by this edit.

include/llvm/CodeGen/MachineBlockFrequencyInfo.h

class MachineBlockFrequencyInfo : public MachineFunctionPass {
   typedef BlockFrequencyInfoImpl<MachineBasicBlock> ImplType;
   std::unique_ptr<ImplType> MBFI;
 
 public:
   static char ID;
 
   MachineBlockFrequencyInfo();
 
-  ~MachineBlockFrequencyInfo();
+  ~MachineBlockFrequencyInfo() override;
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 
   bool runOnMachineFunction(MachineFunction &F) override;
 
   void releaseMemory() override;
 
   /// getblockFreq - Return block frequency. Return 0 if we don't have the

include/llvm/CodeGen/MachineDominators.h

class MachineDominatorTree : public MachineFunctionPass {
   void applySplitCriticalEdges() const;
 
 public:
   static char ID; // Pass ID, replacement for typeid
   DominatorTreeBase<MachineBasicBlock>* DT;
 
   MachineDominatorTree();
 
-  ~MachineDominatorTree();
+  ~MachineDominatorTree() override;
 
   DominatorTreeBase<MachineBasicBlock> &getBase() {
     applySplitCriticalEdges();
     return *DT;
   }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 

include/llvm/CodeGen/MachineFunctionAnalysis.h

 struct MachineFunctionAnalysis : public FunctionPass {
 private:
   const TargetMachine &TM;
   MachineFunction *MF;
   unsigned NextFnNum;
 public:
   static char ID;
   explicit MachineFunctionAnalysis(const TargetMachine &tm);
-  ~MachineFunctionAnalysis();
+  ~MachineFunctionAnalysis() override;
 
   MachineFunction &getMF() const { return *MF; }
 
   const char* getPassName() const override {
     return "Machine Function Analysis";
   }
 
 private:

include/llvm/CodeGen/MachineModuleInfo.h

public:
   };
   typedef SmallVector<VariableDbgInfo, 4> VariableDbgInfoMapTy;
   VariableDbgInfoMapTy VariableDbgInfos;
 
   MachineModuleInfo();  // DUMMY CONSTRUCTOR, DO NOT CALL.
   // Real constructor.
   MachineModuleInfo(const MCAsmInfo &MAI, const MCRegisterInfo &MRI,
                     const MCObjectFileInfo *MOFI);
-  ~MachineModuleInfo();
+  ~MachineModuleInfo() override;
 
   // Initialization and Finalization
   bool doInitialization(Module &) override;
   bool doFinalization(Module &) override;
 
   /// EndFunction - Discard function meta information.
   ///
   void EndFunction();

include/llvm/CodeGen/MachinePassRegistry.h

 ///
 //===----------------------------------------------------------------------===//
 template<class RegistryClass>
 class RegisterPassParser : public MachinePassRegistryListener,
                    public cl::parser<typename RegistryClass::FunctionPassCtor> {
 public:
   RegisterPassParser(cl::Option &O)
       : cl::parser<typename RegistryClass::FunctionPassCtor>(O) {}
-  ~RegisterPassParser() { RegistryClass::setListener(nullptr); }
+  ~RegisterPassParser() override { RegistryClass::setListener(nullptr); }
 
   void initialize() {
     cl::parser<typename RegistryClass::FunctionPassCtor>::initialize();
 
     // Add existing passes to option.
     for (RegistryClass *Node = RegistryClass::getList();
          Node; Node = Node->getNext()) {
       this->addLiteralOption(Node->getName(),

include/llvm/CodeGen/MachinePostDominators.h

 private:
   DominatorTreeBase<MachineBasicBlock> *DT;
 
 public:
   static char ID;
 
   MachinePostDominatorTree();
 
-  ~MachinePostDominatorTree();
+  ~MachinePostDominatorTree() override;
 
   FunctionPass *createMachinePostDominatorTreePass();
 
   const std::vector<MachineBasicBlock *> &getRoots() const {
     return DT->getRoots();
   }
 
   MachineDomTreeNode *getRootNode() const {

include/llvm/CodeGen/MachineRegionInfo.h

bool operator==(const MachineRegionNode &RN) const {
     return &RN == reinterpret_cast<const MachineRegionNode*>(this);
   }
 };
 
 class MachineRegionInfo : public RegionInfoBase<RegionTraits<MachineFunction>> {
 public:
   explicit MachineRegionInfo();
 
-  virtual ~MachineRegionInfo();
+  ~MachineRegionInfo() override;
 
   // updateStatistics - Update statistic about created regions.
   void updateStatistics(MachineRegion *R) final;
 
   void recalculate(MachineFunction &F,
                    MachineDominatorTree *DT,
                    MachinePostDominatorTree *PDT,
                    MachineDominanceFrontier *DF);
 };
 
 class MachineRegionInfoPass : public MachineFunctionPass {
   MachineRegionInfo RI;
 
 public:
   static char ID;
   explicit MachineRegionInfoPass();
 
-  ~MachineRegionInfoPass();
+  ~MachineRegionInfoPass() override;
 
   MachineRegionInfo &getRegionInfo() {
     return RI;
   }
 
   const MachineRegionInfo &getRegionInfo() const {
     return RI;
   }

include/llvm/CodeGen/MachineScheduler.h

 public:
   ScheduleDAGMILive(MachineSchedContext *C,
                     std::unique_ptr<MachineSchedStrategy> S)
       : ScheduleDAGMI(C, std::move(S), /*IsPostRA=*/false),
         RegClassInfo(C->RegClassInfo), DFSResult(nullptr),
         ShouldTrackPressure(false), RPTracker(RegPressure),
         TopRPTracker(TopPressure), BotRPTracker(BotPressure) {}
 
-  virtual ~ScheduleDAGMILive();
+  ~ScheduleDAGMILive() override;
 
   /// Return true if this DAG supports VReg liveness and RegPressure.
   bool hasVRegLiveness() const override { return true; }
 
   /// \brief Return true if register pressure tracking is enabled.
   bool isTrackingPressure() const { return ShouldTrackPressure; }
 
   /// Get current register pressure for the top scheduled instructions.

 class PostGenericScheduler : public GenericSchedulerBase {
   ScheduleDAGMI *DAG;
   SchedBoundary Top;
   SmallVector<SUnit*, 8> BotRoots;
 public:
   PostGenericScheduler(const MachineSchedContext *C):
     GenericSchedulerBase(C), Top(SchedBoundary::TopQID, "TopQ") {}
 
-  virtual ~PostGenericScheduler() {}
+  ~PostGenericScheduler() override {}
 
   void initPolicy(MachineBasicBlock::iterator Begin,
                   MachineBasicBlock::iterator End,
                   unsigned NumRegionInstrs) override {
     /* no configurable policy */
   };
 
   /// PostRA scheduling does not track pressure.

include/llvm/CodeGen/Passes.h

protected:
   /// Default setting for -enable-tail-merge on this target.
   bool EnableTailMerge;
 
 public:
   TargetPassConfig(TargetMachine *tm, PassManagerBase &pm);
   // Dummy constructor.
   TargetPassConfig();
 
-  virtual ~TargetPassConfig();
+  ~TargetPassConfig() override;
 
   static char ID;
 
   /// Get the right type of TargetMachine for this target.
   template<typename TMC> TMC &getTM() const {
     return *static_cast<TMC*>(TM);
   }
 

include/llvm/CodeGen/ScheduleDAGInstrs.h

namespace llvm {
 
   public:
     explicit ScheduleDAGInstrs(MachineFunction &mf,
                                const MachineLoopInfo *mli,
                                bool IsPostRAFlag,
                                bool RemoveKillFlags = false,
                                LiveIntervals *LIS = nullptr);
 
-    virtual ~ScheduleDAGInstrs() {}
+    ~ScheduleDAGInstrs() override {}
 
     bool isPostRA() const { return IsPostRA; }
 
     /// \brief Expose LiveIntervals for use in DAG mutators and such.
     LiveIntervals *getLIS() const { return LIS; }
 
     /// \brief Get the machine model for instruction scheduling.
     const TargetSchedModel *getSchedModel() const { return &SchedModel; }

include/llvm/CodeGen/SelectionDAGISel.h

public:
   CodeGenOpt::Level OptLevel;
   const TargetInstrInfo *TII;
   const TargetLowering *TLI;
 
   static char ID;
 
   explicit SelectionDAGISel(TargetMachine &tm,
                             CodeGenOpt::Level OL = CodeGenOpt::Default);
-  virtual ~SelectionDAGISel();
+  ~SelectionDAGISel() override;
 
   const TargetLowering *getTargetLowering() const { return TLI; }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 
   bool runOnMachineFunction(MachineFunction &MF) override;
 
   virtual void EmitFunctionEntryCode() {}

include/llvm/CodeGen/TargetLoweringObjectFileImpl.h

 
 class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
   bool UseInitArray;
   mutable unsigned NextUniqueID = 0;
 
 public:
   TargetLoweringObjectFileELF() : UseInitArray(false) {}
 
-  virtual ~TargetLoweringObjectFileELF() {}
+  ~TargetLoweringObjectFileELF() override {}
 
   void emitPersonalityValue(MCStreamer &Streamer, const TargetMachine &TM,
                             const MCSymbol *Sym) const override;
 
   /// Given a constant with the SectionKind, return a section that it should be
   /// placed in.
   const MCSection *getSectionForConstant(SectionKind Kind,
                                          const Constant *C) const override;
public:
   const MCSection *getStaticDtorSection(unsigned Priority,
                                         const MCSymbol *KeySym) const override;
 };
 
 
 
 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
 public:
-  virtual ~TargetLoweringObjectFileMachO() {}
+  ~TargetLoweringObjectFileMachO() override {}
   TargetLoweringObjectFileMachO();
 
   /// Extract the dependent library name from a linker option string. Returns
   /// StringRef() if the option does not specify a library.
   StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
 
   /// Emit the module flags that specify the garbage collection information.
   void emitModuleFlags(MCStreamer &Streamer,
const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym,
                                           MachineModuleInfo *MMI,
                                           MCStreamer &Streamer) const override;
 };
 
 
 
 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
 public:
-  virtual ~TargetLoweringObjectFileCOFF() {}
+  ~TargetLoweringObjectFileCOFF() override {}
 
   const MCSection *
     getExplicitSectionGlobal(const GlobalValue *GV,
                              SectionKind Kind, Mangler &Mang,
                              const TargetMachine &TM) const override;
 
   const MCSection *
     SelectSectionForGlobal(const GlobalValue *GV,

include/llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h

 namespace llvm {
 
 template <typename ChildType>
 class ConcreteSymbolEnumerator : public IPDBEnumChildren<ChildType> {
 public:
   ConcreteSymbolEnumerator(std::unique_ptr<IPDBEnumSymbols> SymbolEnumerator)
       : Enumerator(std::move(SymbolEnumerator)) {}
 
-  virtual ~ConcreteSymbolEnumerator() {}
+  ~ConcreteSymbolEnumerator() override {}
 
   uint32_t getChildCount() const override {
     return Enumerator->getChildCount();
   }
 
   std::unique_ptr<ChildType> getChildAtIndex(uint32_t Index) const override {
     std::unique_ptr<PDBSymbol> Child = Enumerator->getChildAtIndex(Index);
     return make_concrete_child(std::move(Child));

include/llvm/ExecutionEngine/RTDyldMemoryManager.h

 // FIXME: As the RuntimeDyld fills out, additional routines will be needed
 //        for the varying types of objects to be allocated.
 class RTDyldMemoryManager : public MCJITMemoryManager,
                             public RuntimeDyld::SymbolResolver {
   RTDyldMemoryManager(const RTDyldMemoryManager&) = delete;
   void operator=(const RTDyldMemoryManager&) = delete;
 public:
   RTDyldMemoryManager() {}
-  virtual ~RTDyldMemoryManager();
+  ~RTDyldMemoryManager() override;
 
   void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr, size_t Size) override;
   void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr, size_t Size) override;
 
   /// This method returns the address of the specified function or variable in
   /// the current process.
   static uint64_t getSymbolAddressInProcess(const std::string &Name);
 

include/llvm/ExecutionEngine/SectionMemoryManager.h

 /// MCJIT::finalizeObject or by calling SectionMemoryManager::finalizeMemory
 /// directly.  Clients of MCJIT should call MCJIT::finalizeObject.
 class SectionMemoryManager : public RTDyldMemoryManager {
   SectionMemoryManager(const SectionMemoryManager&) = delete;
   void operator=(const SectionMemoryManager&) = delete;
 
 public:
   SectionMemoryManager() { }
-  virtual ~SectionMemoryManager();
+  ~SectionMemoryManager() override;
 
   /// \brief Allocates a memory block of (at least) the given size suitable for
   /// executable code.
   ///
   /// The value of \p Alignment must be a power of two.  If \p Alignment is zero
   /// a default alignment of 16 will be used.
   uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID,

include/llvm/IR/BasicBlock.h

public:
   /// If the Parent parameter is specified, the basic block is automatically
   /// inserted at either the end of the function (if InsertBefore is 0), or
   /// before the specified basic block.
   static BasicBlock *Create(LLVMContext &Context, const Twine &Name = "",
                             Function *Parent = nullptr,
                             BasicBlock *InsertBefore = nullptr) {
     return new BasicBlock(Context, Name, Parent, InsertBefore);
   }
-  ~BasicBlock();
+  ~BasicBlock() override;
 
   /// \brief Return the enclosing method, or null if none.
   const Function *getParent() const { return Parent; }
         Function *getParent()       { return Parent; }
 
   /// \brief Return the module owning the function this basic block belongs to,
   /// or nullptr it the function does not have a module.
   ///

include/llvm/IR/Constants.h

class ConstantDataSequential : public Constant {
   /// element array of i8, or a 1-element array of i32.  They'll both end up in
   /// the same StringMap bucket, linked up.
   ConstantDataSequential *Next;
   void *operator new(size_t, unsigned) = delete;
   ConstantDataSequential(const ConstantDataSequential &) = delete;
 protected:
   explicit ConstantDataSequential(Type *ty, ValueTy VT, const char *Data)
     : Constant(ty, VT, nullptr, 0), DataElements(Data), Next(nullptr) {}
-  ~ConstantDataSequential() { delete Next; }
+  ~ConstantDataSequential() override { delete Next; }
 
   static Constant *getImpl(StringRef Bytes, Type *Ty);
 
 protected:
   // allocate space for exactly zero operands.
   void *operator new(size_t s) {
     return User::operator new(s, 0);
   }

include/llvm/IR/Function.h

Function(FunctionType *Ty, LinkageTypes Linkage,
            const Twine &N = "", Module *M = nullptr);
 
 public:
   static Function *Create(FunctionType *Ty, LinkageTypes Linkage,
                           const Twine &N = "", Module *M = nullptr) {
     return new(0) Function(Ty, Linkage, N, M);
   }
 
-  ~Function();
+  ~Function() override;
 
   Type *getReturnType() const;           // Return the type of the ret val
   FunctionType *getFunctionType() const; // Return the FunctionType for me
 
   /// getContext - Return a pointer to the LLVMContext associated with this
   /// function, or NULL if this function is not bound to a context yet.
   LLVMContext &getContext() const;
 

include/llvm/IR/GlobalValue.h

public:
   enum ThreadLocalMode {
     NotThreadLocal = 0,
     GeneralDynamicTLSModel,
     LocalDynamicTLSModel,
     InitialExecTLSModel,
     LocalExecTLSModel
   };
 
-  ~GlobalValue() {
+  ~GlobalValue() override {
     removeDeadConstantUsers();   // remove any dead constants using this.
   }
 
   unsigned getAlignment() const;
 
   bool hasUnnamedAddr() const { return UnnamedAddr; }
   void setUnnamedAddr(bool Val) { UnnamedAddr = Val; }
 

include/llvm/IR/GlobalVariable.h

public:
   /// GlobalVariable ctor - This creates a global and inserts it before the
   /// specified other global.
   GlobalVariable(Module &M, Type *Ty, bool isConstant,
                  LinkageTypes Linkage, Constant *Initializer,
                  const Twine &Name = "", GlobalVariable *InsertBefore = nullptr,
                  ThreadLocalMode = NotThreadLocal, unsigned AddressSpace = 0,
                  bool isExternallyInitialized = false);
 
-  ~GlobalVariable() {
+  ~GlobalVariable() override {
     NumOperands = 1; // FIXME: needed by operator delete
   }
 
   /// Provide fast operand accessors
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   /// Definitions have initializers, declarations don't.
   ///

include/llvm/IR/InlineAsm.h

private:
   std::string AsmString, Constraints;
   bool HasSideEffects;
   bool IsAlignStack;
   AsmDialect Dialect;
 
   InlineAsm(PointerType *Ty, const std::string &AsmString,
             const std::string &Constraints, bool hasSideEffects,
             bool isAlignStack, AsmDialect asmDialect);
-  virtual ~InlineAsm();
+  ~InlineAsm() override;
 
   /// When the ConstantUniqueMap merges two types and makes two InlineAsms
   /// identical, it destroys one of them with this method.
   void destroyConstant();
 public:
 
   /// InlineAsm::get - Return the specified uniqued inline asm string.
   ///

include/llvm/IR/InstrTypes.h

TerminatorInst(Type *Ty, Instruction::TermOps iType,
                  Instruction *InsertBefore = nullptr)
     : Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
 
   TerminatorInst(Type *Ty, Instruction::TermOps iType,
                  Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd)
     : Instruction(Ty, iType, Ops, NumOps, InsertAtEnd) {}
 
   // Out of line virtual method, so the vtable, etc has a home.
-  ~TerminatorInst();
+  ~TerminatorInst() override;
 
   /// Virtual methods - Terminators should overload these and provide inline
   /// overrides of non-V methods.
   virtual BasicBlock *getSuccessorV(unsigned idx) const = 0;
   virtual unsigned getNumSuccessorsV() const = 0;
   virtual void setSuccessorV(unsigned idx, BasicBlock *B) = 0;
 public:
 
protected:
   }
 public:
   // allocate space for exactly one operand
   void *operator new(size_t s) {
     return User::operator new(s, 1);
   }
 
   // Out of line virtual method, so the vtable, etc has a home.
-  ~UnaryInstruction();
+  ~UnaryInstruction() override;
 
   /// Transparently provide more efficient getOperand methods.
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Instruction *I) {
     return I->getOpcode() == Instruction::Alloca ||
            I->getOpcode() == Instruction::Load ||

include/llvm/IR/Instruction.h

class Instruction : public User, public ilist_node<Instruction> {
 
   enum {
     /// HasMetadataBit - This is a bit stored in the SubClassData field which
     /// indicates whether this instruction has metadata attached to it or not.
     HasMetadataBit = 1 << 15
   };
 public:
   // Out of line virtual method, so the vtable, etc has a home.
-  ~Instruction();
+  ~Instruction() override;
 
   /// user_back - Specialize the methods defined in Value, as we know that an
   /// instruction can only be used by other instructions.
   Instruction       *user_back()       { return cast<Instruction>(*user_begin());}
   const Instruction *user_back() const { return cast<Instruction>(*user_begin());}
 
   inline const BasicBlock *getParent() const { return Parent; }
   inline       BasicBlock *getParent()       { return Parent; }

include/llvm/IR/Instructions.h

public:
   AllocaInst(Type *Ty, const Twine &Name, BasicBlock *InsertAtEnd);
 
   AllocaInst(Type *Ty, Value *ArraySize, unsigned Align,
              const Twine &Name = "", Instruction *InsertBefore = nullptr);
   AllocaInst(Type *Ty, Value *ArraySize, unsigned Align,
              const Twine &Name, BasicBlock *InsertAtEnd);
 
   // Out of line virtual method, so the vtable, etc. has a home.
-  virtual ~AllocaInst();
+  ~AllocaInst() override;
 
   /// isArrayAllocation - Return true if there is an allocation size parameter
   /// to the allocation instruction that is not 1.
   ///
   bool isArrayAllocation() const;
 
   /// getArraySize - Get the number of elements allocated. For a simple
   /// allocation of a single element, this will return a constant 1 value.
static Instruction *CreateMalloc(BasicBlock *InsertAtEnd,
                                    Type *IntPtrTy, Type *AllocTy,
                                    Value *AllocSize, Value *ArraySize = nullptr,
                                    Function* MallocF = nullptr,
                                    const Twine &Name = "");
   /// CreateFree - Generate the IR for a call to the builtin free function.
   static Instruction* CreateFree(Value* Source, Instruction *InsertBefore);
   static Instruction* CreateFree(Value* Source, BasicBlock *InsertAtEnd);
 
-  ~CallInst();
+  ~CallInst() override;
 
   // Note that 'musttail' implies 'tail'.
   enum TailCallKind { TCK_None = 0, TCK_Tail = 1, TCK_MustTail = 2 };
   TailCallKind getTailCallKind() const {
     return TailCallKind(getSubclassDataFromInstruction() & 3);
   }
   bool isTailCall() const {
     return (getSubclassDataFromInstruction() & 3) != TCK_None;
static PHINode *Create(Type *Ty, unsigned NumReservedValues,
                          const Twine &NameStr = "",
                          Instruction *InsertBefore = nullptr) {
     return new PHINode(Ty, NumReservedValues, NameStr, InsertBefore);
   }
   static PHINode *Create(Type *Ty, unsigned NumReservedValues,
                          const Twine &NameStr, BasicBlock *InsertAtEnd) {
     return new PHINode(Ty, NumReservedValues, NameStr, InsertAtEnd);
   }
-  ~PHINode();
+  ~PHINode() override;
 
   /// Provide fast operand accessors
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   // Block iterator interface. This provides access to the list of incoming
   // basic blocks, which parallels the list of incoming values.
 
   typedef BasicBlock **block_iterator;
public:
   /// clauses that this landingpad will have (use 0 if you really have no idea).
   static LandingPadInst *Create(Type *RetTy, Value *PersonalityFn,
                                 unsigned NumReservedClauses,
                                 const Twine &NameStr = "",
                                 Instruction *InsertBefore = nullptr);
   static LandingPadInst *Create(Type *RetTy, Value *PersonalityFn,
                                 unsigned NumReservedClauses,
                                 const Twine &NameStr, BasicBlock *InsertAtEnd);
-  ~LandingPadInst();
+  ~LandingPadInst() override;
 
   /// Provide fast operand accessors
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   /// getPersonalityFn - Get the personality function associated with this
   /// landing pad.
   Value *getPersonalityFn() const { return getOperand(0); }
 
public:
   }
   static ReturnInst* Create(LLVMContext &C, Value *retVal,
                             BasicBlock *InsertAtEnd) {
     return new(!!retVal) ReturnInst(C, retVal, InsertAtEnd);
   }
   static ReturnInst* Create(LLVMContext &C, BasicBlock *InsertAtEnd) {
     return new(0) ReturnInst(C, InsertAtEnd);
   }
-  virtual ~ReturnInst();
+  ~ReturnInst() override;
 
   /// Provide fast operand accessors
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   /// Convenience accessor. Returns null if there is no return value.
   Value *getReturnValue() const {
     return getNumOperands() != 0 ? getOperand(0) : nullptr;
   }
static SwitchInst *Create(Value *Value, BasicBlock *Default,
                             Instruction *InsertBefore = nullptr) {
     return new SwitchInst(Value, Default, NumCases, InsertBefore);
   }
   static SwitchInst *Create(Value *Value, BasicBlock *Default,
                             unsigned NumCases, BasicBlock *InsertAtEnd) {
     return new SwitchInst(Value, Default, NumCases, InsertAtEnd);
   }
 
-  ~SwitchInst();
+  ~SwitchInst() override;
 
   /// Provide fast operand accessors
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   // Accessor Methods for Switch stmt
   Value *getCondition() const { return getOperand(0); }
   void setCondition(Value *V) { setOperand(0, V); }
 
public:
   static IndirectBrInst *Create(Value *Address, unsigned NumDests,
                                 Instruction *InsertBefore = nullptr) {
     return new IndirectBrInst(Address, NumDests, InsertBefore);
   }
   static IndirectBrInst *Create(Value *Address, unsigned NumDests,
                                 BasicBlock *InsertAtEnd) {
     return new IndirectBrInst(Address, NumDests, InsertAtEnd);
   }
-  ~IndirectBrInst();
+  ~IndirectBrInst() override;
 
   /// Provide fast operand accessors.
   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
 
   // Accessor Methods for IndirectBrInst instruction.
   Value *getAddress() { return getOperand(0); }
   const Value *getAddress() const { return getOperand(0); }
   void setAddress(Value *V) { setOperand(0, V); }

include/llvm/IR/LegacyPassManager.h

public:
   virtual void add(Pass *P) = 0;
 };
 
 /// PassManager manages ModulePassManagers
 class PassManager : public PassManagerBase {
 public:
 
   PassManager();
-  ~PassManager();
+  ~PassManager() override;
 
   void add(Pass *P) override;
 
   /// run - Execute all of the passes scheduled for execution.  Keep track of
   /// whether any of the passes modifies the module, and if so, return true.
   bool run(Module &M);
 
 private:
   /// PassManagerImpl_New is the actual class. PassManager is just the
   /// wraper to publish simple pass manager interface
   PassManagerImpl *PM;
 };
 
 /// FunctionPassManager manages FunctionPasses and BasicBlockPassManagers.
 class FunctionPassManager : public PassManagerBase {
 public:
   /// FunctionPassManager ctor - This initializes the pass manager.  It needs,
   /// but does not take ownership of, the specified Module.
   explicit FunctionPassManager(Module *M);
-  ~FunctionPassManager();
+  ~FunctionPassManager() override;
 
   void add(Pass *P) override;
 
   /// run - Execute all of the passes scheduled for execution.  Keep
   /// track of whether any of the passes modifies the function, and if
   /// so, return true.
   ///
   bool run(Function &F);

include/llvm/IR/LegacyPassNameParser.h

 //===----------------------------------------------------------------------===//
 // PassNameParser class - Make use of the pass registration mechanism to
 // automatically add a command line argument to opt for each pass.
 //
 class PassNameParser : public PassRegistrationListener,
                        public cl::parser<const PassInfo*> {
 public:
   PassNameParser(cl::Option &O);
-  virtual ~PassNameParser();
+  ~PassNameParser() override;
 
   void initialize() {
     cl::parser<const PassInfo*>::initialize();
 
     // Add all of the passes to the map that got initialized before 'this' did.
     enumeratePasses();
   }
 

include/llvm/IR/Metadata.h

 /// reference \a LocalAsMetadata.
 class MetadataAsValue : public Value {
   friend class ReplaceableMetadataImpl;
   friend class LLVMContextImpl;
 
   Metadata *MD;
 
   MetadataAsValue(Type *Ty, Metadata *MD);
-  ~MetadataAsValue();
+  ~MetadataAsValue() override;
 
   /// \brief Drop use of metadata (during teardown).
   void dropUse() { MD = nullptr; }
 
 public:
   static MetadataAsValue *get(LLVMContext &Context, Metadata *MD);
   static MetadataAsValue *getIfExists(LLVMContext &Context, Metadata *MD);
   Metadata *getMetadata() const { return MD; }

include/llvm/IR/Operator.h

private:
   void *operator new(size_t, unsigned) = delete;
   void *operator new(size_t s) = delete;
   Operator() = delete;
 
 protected:
   // NOTE: Cannot use = delete because it's not legal to delete
   // an overridden method that's not deleted in the base class. Cannot leave
   // this unimplemented because that leads to an ODR-violation.
-  ~Operator();
+  ~Operator() override;
 
 public:
   /// Return the opcode for this Instruction or ConstantExpr.
   unsigned getOpcode() const {
     if (const Instruction *I = dyn_cast<Instruction>(this))
       return I->getOpcode();
     return cast<ConstantExpr>(this)->getOpcode();
   }

include/llvm/IR/User.h

protected:
   Use *allocHungoffUses(unsigned) const;
   void dropHungoffUses() {
     Use::zap(OperandList, OperandList + NumOperands, true);
     OperandList = nullptr;
     // Reset NumOperands so User::operator delete() does the right thing.
     NumOperands = 0;
   }
 public:
-  ~User() {
-    Use::zap(OperandList, OperandList + NumOperands);
-  }
+  ~User() override { Use::zap(OperandList, OperandList + NumOperands); }
   /// \brief Free memory allocated for User and Use objects.
   void operator delete(void *Usr);
   /// \brief Placement delete - required by std, but never called.
   void operator delete(void*, unsigned) {
     llvm_unreachable("Constructor throws?");
   }
   /// \brief Placement delete - required by std, but never called.
   void operator delete(void*, unsigned, bool) {

include/llvm/LineEditor/LineEditor.h

private:
   std::unique_ptr<InternalData> Data;
 
   struct CompleterConcept {
     virtual ~CompleterConcept();
     virtual CompletionAction complete(StringRef Buffer, size_t Pos) const = 0;
   };
 
   struct ListCompleterConcept : CompleterConcept {
-    ~ListCompleterConcept();
+    ~ListCompleterConcept() override;
     CompletionAction complete(StringRef Buffer, size_t Pos) const override;
     static std::string getCommonPrefix(const std::vector<Completion> &Comps);
     virtual std::vector<Completion> getCompletions(StringRef Buffer,
                                                    size_t Pos) const = 0;
   };
 
   template <typename T>
   struct CompleterModel : CompleterConcept {

include/llvm/MC/MCAsmInfoELF.h

 #ifndef LLVM_MC_MCASMINFOELF_H
 #define LLVM_MC_MCASMINFOELF_H
 
 #include "llvm/MC/MCAsmInfo.h"
 
 namespace llvm {
 class MCAsmInfoELF : public MCAsmInfo {
   virtual void anchor();
-  const MCSection *
-  getNonexecutableStackSection(MCContext &Ctx) const override final;
+  const MCSection *getNonexecutableStackSection(MCContext &Ctx) const final;
 
 protected:
   MCAsmInfoELF();
 };
 }
 
 #endif

include/llvm/MC/MCAssembler.h

class MCEncodedFragment : public MCFragment {
   virtual void anchor();
 
   uint8_t BundlePadding;
 public:
   MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = nullptr)
     : MCFragment(FType, SD), BundlePadding(0)
   {
   }
-  virtual ~MCEncodedFragment();
+  ~MCEncodedFragment() override;
 
   virtual SmallVectorImpl<char> &getContents() = 0;
   virtual const SmallVectorImpl<char> &getContents() const = 0;
 
   uint8_t getBundlePadding() const override {
     return BundlePadding;
   }
 

 
 public:
   MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
                               MCSectionData *SD = nullptr)
     : MCEncodedFragment(FType, SD)
   {
   }
 
-  virtual ~MCEncodedFragmentWithFixups();
+  ~MCEncodedFragmentWithFixups() override;
 
   typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
   typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
 
   virtual SmallVectorImpl<MCFixup> &getFixups() = 0;
   virtual const SmallVectorImpl<MCFixup> &getFixups() const = 0;
 
   virtual fixup_iterator fixup_begin() = 0;

include/llvm/MC/MCELFStreamer.h

 
 class MCELFStreamer : public MCObjectStreamer {
 public:
   MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
                 MCCodeEmitter *Emitter)
       : MCObjectStreamer(Context, TAB, OS, Emitter),
         SeenIdent(false) {}
 
-  virtual ~MCELFStreamer();
+  ~MCELFStreamer() override;
 
   /// state management
   void reset() override {
     LocalCommons.clear();
     BindingExplicitlySet.clear();
     SeenIdent = false;
     MCObjectStreamer::reset();
   }

include/llvm/MC/MCLinkerOptimizationHint.h

class raw_counting_ostream : public raw_ostream {
       uint64_t Count;
 
       void write_impl(const char *, size_t size) override { Count += size; }
 
       uint64_t current_pos() const override { return Count; }
 
     public:
       raw_counting_ostream() : raw_ostream(SK_COUNTING), Count(0) {}
-      ~raw_counting_ostream() { flush(); }
+      ~raw_counting_ostream() override { flush(); }
 
       static bool classof(const raw_ostream *OS) {
         return OS->getKind() == SK_COUNTING;
       }
     };
 
     raw_counting_ostream OutStream;
     Emit_impl(OutStream, ObjWriter, Layout);

include/llvm/MC/MCObjectStreamer.h

class MCObjectStreamer : public MCStreamer {
 
   // If any labels have been emitted but not assigned fragments, ensure that
   // they get assigned, either to F if possible or to a new data fragment.
   void flushPendingLabels(MCFragment *F);
 
 protected:
   MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
                    MCCodeEmitter *Emitter);
-  ~MCObjectStreamer();
+  ~MCObjectStreamer() override;
 
 public:
   /// state management
   void reset() override;
 
   /// Object streamers require the integrated assembler.
   bool isIntegratedAssemblerRequired() const override { return true; }
 

include/llvm/MC/MCParser/AsmLexer.h

class AsmLexer : public MCAsmLexer {
   AsmLexer(const AsmLexer&) = delete;
 
 protected:
   /// LexToken - Read the next token and return its code.
   AsmToken LexToken() override;
 
 public:
   AsmLexer(const MCAsmInfo &MAI);
-  ~AsmLexer();
+  ~AsmLexer() override;
 
   void setBuffer(StringRef Buf, const char *ptr = nullptr);
 
   StringRef LexUntilEndOfStatement() override;
   StringRef LexUntilEndOfLine();
 
   const AsmToken peekTok(bool ShouldSkipSpace = true) override;
 

include/llvm/MC/MCSectionCOFF.h

MCSectionCOFF(StringRef Section, unsigned Characteristics,
                   MCSymbol *COMDATSymbol, int Selection, SectionKind K,
                   MCSymbol *Begin)
         : MCSection(SV_COFF, K, Begin), SectionName(Section),
           Characteristics(Characteristics), COMDATSymbol(COMDATSymbol),
           Selection(Selection) {
       assert ((Characteristics & 0x00F00000) == 0 &&
         "alignment must not be set upon section creation");
     }
-    ~MCSectionCOFF();
+    ~MCSectionCOFF() override;
 
   public:
     /// ShouldOmitSectionDirective - Decides whether a '.section' directive
     /// should be printed before the section name
     bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
 
     StringRef getSectionName() const { return SectionName; }
     unsigned getCharacteristics() const { return Characteristics; }

include/llvm/MC/MCSectionELF.h

 private:
   friend class MCContext;
   MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K,
                unsigned entrySize, const MCSymbol *group, unsigned UniqueID,
                MCSymbol *Begin, const MCSectionELF *Associated)
       : MCSection(SV_ELF, K, Begin), SectionName(Section), Type(type),
         Flags(flags), UniqueID(UniqueID), EntrySize(entrySize), Group(group),
         Associated(Associated) {}
-  ~MCSectionELF();
+  ~MCSectionELF() override;
 
   void setSectionName(StringRef Name) { SectionName = Name; }
 
 public:
 
   /// ShouldOmitSectionDirective - Decides whether a '.section' directive
   /// should be printed before the section name
   bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;

include/llvm/MC/MCStreamer.h

public:
   virtual void emitAssignment(MCSymbol *Symbol, const MCExpr *Value);
 
   virtual void finish();
 };
 
 class AArch64TargetStreamer : public MCTargetStreamer {
 public:
   AArch64TargetStreamer(MCStreamer &S);
-  ~AArch64TargetStreamer();
+  ~AArch64TargetStreamer() override;
 
   void finish() override;
 
   /// Callback used to implement the ldr= pseudo.
   /// Add a new entry to the constant pool for the current section and return an
   /// MCExpr that can be used to refer to the constant pool location.
   const MCExpr *addConstantPoolEntry(const MCExpr *, unsigned Size);
 
   /// Callback used to implemnt the .ltorg directive.
   /// Emit contents of constant pool for the current section.
   void emitCurrentConstantPool();
 
   /// Callback used to implement the .inst directive.
   virtual void emitInst(uint32_t Inst);
 
 private:
   std::unique_ptr<AssemblerConstantPools> ConstantPools;
 };
 
 // FIXME: declared here because it is used from
 // lib/CodeGen/AsmPrinter/ARMException.cpp.
 class ARMTargetStreamer : public MCTargetStreamer {
 public:
   ARMTargetStreamer(MCStreamer &S);
-  ~ARMTargetStreamer();
+  ~ARMTargetStreamer() override;
 
   virtual void emitFnStart();
   virtual void emitFnEnd();
   virtual void emitCantUnwind();
   virtual void emitPersonality(const MCSymbol *Personality);
   virtual void emitPersonalityIndex(unsigned Index);
   virtual void emitHandlerData();
   virtual void emitSetFP(unsigned FpReg, unsigned SpReg,

include/llvm/MC/MCTargetAsmParser.h

protected: // Can only create subclasses.
   /// SemaCallback - The Sema callback implementation.  Must be set when parsing
   /// ms-style inline assembly.
   MCAsmParserSemaCallback *SemaCallback;
 
   /// Set of options which affects instrumentation of inline assembly.
   MCTargetOptions MCOptions;
 
 public:
-  virtual ~MCTargetAsmParser();
+  ~MCTargetAsmParser() override;
 
   uint64_t getAvailableFeatures() const { return AvailableFeatures; }
   void setAvailableFeatures(uint64_t Value) { AvailableFeatures = Value; }
 
   bool isParsingInlineAsm () { return ParsingInlineAsm; }
   void setParsingInlineAsm (bool Value) { ParsingInlineAsm = Value; }
 
   MCTargetOptions getTargetOptions() const { return MCOptions; }

include/llvm/Object/IRObjectFile.h

 
 class IRObjectFile : public SymbolicFile {
   std::unique_ptr<Module> M;
   std::unique_ptr<Mangler> Mang;
   std::vector<std::pair<std::string, uint32_t>> AsmSymbols;
 
 public:
   IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> M);
-  ~IRObjectFile();
+  ~IRObjectFile() override;
   void moveSymbolNext(DataRefImpl &Symb) const override;
   std::error_code printSymbolName(raw_ostream &OS,
                                   DataRefImpl Symb) const override;
   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
   GlobalValue *getSymbolGV(DataRefImpl Symb);
   const GlobalValue *getSymbolGV(DataRefImpl Symb) const {
     return const_cast<IRObjectFile *>(this)->getSymbolGV(Symb);
   }

include/llvm/Object/SymbolicFile.h

 };
 
 typedef content_iterator<BasicSymbolRef> basic_symbol_iterator;
 
 const uint64_t UnknownAddressOrSize = ~0ULL;
 
 class SymbolicFile : public Binary {
 public:
-  virtual ~SymbolicFile();
+  ~SymbolicFile() override;
   SymbolicFile(unsigned int Type, MemoryBufferRef Source);
 
   // virtual interface.
   virtual void moveSymbolNext(DataRefImpl &Symb) const = 0;
 
   virtual std::error_code printSymbolName(raw_ostream &OS,
                                           DataRefImpl Symb) const = 0;
 

include/llvm/Option/ArgList.h

private:
   /// convenient place to store the memory) via MakeIndex.
   mutable std::list<std::string> SynthesizedStrings;
 
   /// The number of original input argument strings.
   unsigned NumInputArgStrings;
 
 public:
   InputArgList(const char* const *ArgBegin, const char* const *ArgEnd);
-  ~InputArgList();
+  ~InputArgList() override;
 
   const char *getArgString(unsigned Index) const override {
     return ArgStrings[Index];
   }
 
   unsigned getNumInputArgStrings() const override {
     return NumInputArgStrings;
   }
class DerivedArgList : public ArgList {
   const InputArgList &BaseArgs;
 
   /// The list of arguments we synthesized.
   mutable SmallVector<std::unique_ptr<Arg>, 16> SynthesizedArgs;
 
 public:
   /// Construct a new derived arg list from \p BaseArgs.
   DerivedArgList(const InputArgList &BaseArgs);
-  ~DerivedArgList();
+  ~DerivedArgList() override;
 
   const char *getArgString(unsigned Index) const override {
     return BaseArgs.getArgString(Index);
   }
 
   unsigned getNumInputArgStrings() const override {
     return BaseArgs.getNumInputArgStrings();
   }

include/llvm/Pass.h

public:
 
   void assignPassManager(PMStack &PMS, PassManagerType T) override;
 
   ///  Return what kind of Pass Manager can manage this pass.
   PassManagerType getPotentialPassManagerType() const override;
 
   explicit ModulePass(char &pid) : Pass(PT_Module, pid) {}
   // Force out-of-line virtual method.
-  virtual ~ModulePass();
+  ~ModulePass() override;
 };
 
 
 //===----------------------------------------------------------------------===//
 /// ImmutablePass class - This class is used to provide information that does
 /// not need to be run.  This is useful for things like target information and
 /// "basic" versions of AnalysisGroups.
 ///
public:
   /// ImmutablePasses are never run.
   ///
   bool runOnModule(Module &) override { return false; }
 
   explicit ImmutablePass(char &pid)
   : ModulePass(pid) {}
 
   // Force out-of-line virtual method.
-  virtual ~ImmutablePass();
+  ~ImmutablePass() override;
 };
 
 //===----------------------------------------------------------------------===//
 /// FunctionPass class - This class is used to implement most global
 /// optimizations.  Optimizations should subclass this class if they meet the
 /// following constraints:
 ///
 ///  1. Optimizations are organized globally, i.e., a function at a time

include/llvm/Support/FormattedStream.h

explicit formatted_raw_ostream()
         Position(0, 0) {
     Scanned = nullptr;
   }
 
   static bool classof(const raw_ostream *OS) {
     return OS->getKind() == SK_FORMATTED;
   }
 
-  ~formatted_raw_ostream() {
+  ~formatted_raw_ostream() override {
     flush();
     releaseStream();
   }
 
   void setStream(raw_ostream &Stream, bool Delete = false) {
     releaseStream();
 
     TheStream = &Stream;

include/llvm/Support/YAMLTraits.h

 public:
   // Construct a yaml Input object from a StringRef and optional
   // user-data. The DiagHandler can be specified to provide
   // alternative error reporting.
   Input(StringRef InputContent,
         void *Ctxt = nullptr,
         SourceMgr::DiagHandlerTy DiagHandler = nullptr,
         void *DiagHandlerCtxt = nullptr);
-  ~Input();
+  ~Input() override;
 
   // Check if there was an syntax or semantic error during parsing.
   std::error_code error();
 
 private:
   bool outputting() override;
   bool mapTag(StringRef, bool) override;
   void beginMapping() override;
static inline bool classof(const HNode *n) {
       return ScalarNode::classof(n->_node);
     }
     static inline bool classof(const ScalarHNode *) { return true; }
   protected:
     StringRef _value;
   };
 
   class MapHNode : public HNode {
-    virtual void anchor();
+    void anchor() override;
 
   public:
     MapHNode(Node *n) : HNode(n) { }
 
     static inline bool classof(const HNode *n) {
       return MappingNode::classof(n->_node);
     }
     static inline bool classof(const MapHNode *) { return true; }
 
     typedef llvm::StringMap<std::unique_ptr<HNode>> NameToNode;
 
     bool isValidKey(StringRef key);
 
     NameToNode                        Mapping;
     llvm::SmallVector<const char*, 6> ValidKeys;
   };
 
   class SequenceHNode : public HNode {
-    virtual void anchor();
+    void anchor() override;
 
   public:
     SequenceHNode(Node *n) : HNode(n) { }
 
     static inline bool classof(const HNode *n) {
       return SequenceNode::classof(n->_node);
     }
     static inline bool classof(const SequenceHNode *) { return true; }

 
 ///
 /// The Output class is used to generate a yaml document from in-memory structs
 /// and vectors.
 ///
 class Output : public IO {
 public:
   Output(llvm::raw_ostream &, void *Ctxt=nullptr);
-  virtual ~Output();
+  ~Output() override;
 
   bool outputting() override;
   bool mapTag(StringRef, bool) override;
   void beginMapping() override;
   void endMapping() override;
   bool preflightKey(const char *key, bool, bool, bool &, void *&) override;
   void postflightKey(void *) override;
   unsigned beginSequence() override;

include/llvm/Support/circular_raw_ostream.h

circular_raw_ostream(raw_ostream &Stream, const char *Header,
           OwnsStream(Owns), BufferSize(BuffSize), BufferArray(nullptr),
           Filled(false), Banner(Header) {
       if (BufferSize != 0)
         BufferArray = new char[BufferSize];
       Cur = BufferArray;
       setStream(Stream, Owns);
     }
 
-    ~circular_raw_ostream() {
+    ~circular_raw_ostream() override {
       flush();
       flushBufferWithBanner();
       releaseStream();
       delete[] BufferArray;
     }
 
     /// setStream - Tell the circular_raw_ostream to output a
     /// different stream.  "Owns" tells circular_raw_ostream whether

include/llvm/Support/raw_os_ostream.h

class raw_os_ostream : public raw_ostream {
   void write_impl(const char *Ptr, size_t Size) override;
 
   /// current_pos - Return the current position within the stream, not
   /// counting the bytes currently in the buffer.
   uint64_t current_pos() const override;
 
 public:
   raw_os_ostream(std::ostream &O) : raw_ostream(SK_STD_OS), OS(O) {}
-  ~raw_os_ostream();
+  ~raw_os_ostream() override;
   static bool classof(const raw_ostream *OS) {
     return OS->getKind() == SK_STD_OS;
   }
 };
 
 } // end llvm namespace
 
 #endif

include/llvm/Support/raw_ostream.h

raw_fd_ostream(StringRef Filename, std::error_code &EC,
                  sys::fs::OpenFlags Flags);
 
   /// FD is the file descriptor that this writes to.  If ShouldClose is true,
   /// this closes the file when the stream is destroyed.
   raw_fd_ostream(int fd, bool shouldClose, bool unbuffered=false);
 
   static bool classof(const raw_ostream *OS) { return OS->getKind() == SK_FD; }
 
-  ~raw_fd_ostream();
+  ~raw_fd_ostream() override;
 
   /// Manually flush the stream and close the file. Note that this does not call
   /// fsync.
   void close();
 
   /// Flushes the stream and repositions the underlying file descriptor position
   /// to the offset specified from the beginning of the file.
   uint64_t seek(uint64_t off);
class raw_string_ostream : public raw_ostream {
   /// See raw_ostream::write_impl.
   void write_impl(const char *Ptr, size_t Size) override;
 
   /// Return the current position within the stream, not counting the bytes
   /// currently in the buffer.
   uint64_t current_pos() const override { return OS.size(); }
 public:
   explicit raw_string_ostream(std::string &O) : raw_ostream(SK_STRING), OS(O) {}
-  ~raw_string_ostream();
+  ~raw_string_ostream() override;
 
   static bool classof(const raw_ostream *OS) {
     return OS->getKind() == SK_STRING;
   }
 
   /// Flushes the stream contents to the target string and returns  the string's
   /// reference.
   std::string& str() {
class raw_svector_ostream : public raw_ostream {
   /// currently in the buffer.
   uint64_t current_pos() const override;
 public:
   /// Construct a new raw_svector_ostream.
   ///
   /// \param O The vector to write to; this should generally have at least 128
   /// bytes free to avoid any extraneous memory overhead.
   explicit raw_svector_ostream(SmallVectorImpl<char> &O);
-  ~raw_svector_ostream();
+  ~raw_svector_ostream() override;
 
   static bool classof(const raw_ostream *OS) {
     return OS->getKind() == SK_SVECTOR;
   }
 
   /// This is called when the SmallVector we're appending to is changed outside
   /// of the raw_svector_ostream's control.  It is only safe to do this if the
   /// raw_svector_ostream has previously been flushed.
class raw_null_ostream : public raw_ostream {
   void write_impl(const char *Ptr, size_t size) override;
 
   /// Return the current position within the stream, not counting the bytes
   /// currently in the buffer.
   uint64_t current_pos() const override;
 
 public:
   explicit raw_null_ostream() : raw_ostream(SK_NULL) {}
-  ~raw_null_ostream();
+  ~raw_null_ostream() override;
   static bool classof(const raw_ostream *OS) {
     return OS->getKind() == SK_NULL;
   }
 };
 
 } // end llvm namespace
 
 #endif

lib/Analysis/AliasAnalysisCounter.cpp

AliasAnalysisCounter() : ModulePass(ID) {
       No = May = Partial = Must = 0;
       NoMR = JustRef = JustMod = MR = 0;
     }
 
     void printLine(const char *Desc, unsigned Val, unsigned Sum) {
       errs() <<  "  " << Val << " " << Desc << " responses ("
              << Val*100/Sum << "%)\n";
     }
-    ~AliasAnalysisCounter() {
+    ~AliasAnalysisCounter() override {
       unsigned AASum = No+May+Partial+Must;
       unsigned MRSum = NoMR+JustRef+JustMod+MR;
       if (AASum + MRSum) { // Print a report if any counted queries occurred...
         errs() << "\n===== Alias Analysis Counter Report =====\n"
                << "  Analysis counted:\n"
                << "  " << AASum << " Total Alias Queries Performed\n";
         if (AASum) {
           printLine("no alias",     No, AASum);

lib/Analysis/CFLAliasAnalysis.cpp

 
 struct FunctionHandle : public CallbackVH {
   FunctionHandle(Function *Fn, CFLAliasAnalysis *CFLAA)
       : CallbackVH(Fn), CFLAA(CFLAA) {
     assert(Fn != nullptr);
     assert(CFLAA != nullptr);
   }
 
-  virtual ~FunctionHandle() {}
+  ~FunctionHandle() override {}
 
   void deleted() override { removeSelfFromCache(); }
   void allUsesReplacedWith(Value *) override { removeSelfFromCache(); }
 
 private:
   CFLAliasAnalysis *CFLAA;
 
   void removeSelfFromCache();

 
 public:
   static char ID;
 
   CFLAliasAnalysis() : ImmutablePass(ID) {
     initializeCFLAliasAnalysisPass(*PassRegistry::getPassRegistry());
   }
 
-  virtual ~CFLAliasAnalysis() {}
+  ~CFLAliasAnalysis() override {}
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AliasAnalysis::getAnalysisUsage(AU);
   }
 
   void *getAdjustedAnalysisPointer(const void *ID) override {
     if (ID == &AliasAnalysis::ID)
       return (AliasAnalysis *)this;

lib/Bitcode/Reader/BitcodeReader.cpp

public:
   std::error_code Error(BitcodeError E, const Twine &Message);
   std::error_code Error(BitcodeError E);
   std::error_code Error(const Twine &Message);
 
   explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
                          DiagnosticHandlerFunction DiagnosticHandler);
   explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C,
                          DiagnosticHandlerFunction DiagnosticHandler);
-  ~BitcodeReader() { FreeState(); }
+  ~BitcodeReader() override { FreeState(); }
 
   std::error_code materializeForwardReferencedFunctions();
 
   void FreeState();
 
   void releaseBuffer();
 
   bool isDematerializable(const GlobalValue *GV) const override;

lib/CodeGen/AggressiveAntiDepBreaker.h

class AggressiveAntiDepBreaker : public AntiDepBreaker {
 
     /// The state used to identify and rename anti-dependence registers.
     AggressiveAntiDepState *State;
 
   public:
     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;
 
     /// Identifiy anti-dependencies along the critical path
     /// of the ScheduleDAG and break them by renaming registers.
     ///
     unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,

lib/CodeGen/AsmPrinter/DwarfException.h

class DwarfCFIException : public DwarfCFIExceptionBase {
 
   AsmPrinter::CFIMoveType moveTypeModule;
 
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.
   //
   DwarfCFIException(AsmPrinter *A);
-  virtual ~DwarfCFIException();
+  ~DwarfCFIException() override;
 
   /// Emit all exception information that should come after the content.
   void endModule() override;
 
   /// Gather pre-function exception information.  Assumes being emitted
   /// immediately after the function entry point.
   void beginFunction(const MachineFunction *MF) override;
 
   /// Gather and emit post-function exception information.
   void endFunction(const MachineFunction *) override;
 };
 
 class ARMException : public DwarfCFIExceptionBase {
   void emitTypeInfos(unsigned TTypeEncoding) override;
   ARMTargetStreamer &getTargetStreamer();
 
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.
   //
   ARMException(AsmPrinter *A);
-  virtual ~ARMException();
+  ~ARMException() override;
 
   /// Emit all exception information that should come after the content.
   void endModule() override;
 
   /// Gather pre-function exception information.  Assumes being emitted
   /// immediately after the function entry point.
   void beginFunction(const MachineFunction *MF) override;
 
   /// Gather and emit post-function exception information.
   void endFunction(const MachineFunction *) override;
 };
 } // End of namespace llvm
 
 #endif

lib/CodeGen/AsmPrinter/EHStreamer.h

protected:
   // corresponds to. Negative selectors are for filter clauses, the zero
   // selector is for cleanups, and positive selectors are for catch clauses.
   static bool isFilterEHSelector(int Selector) { return Selector < 0; }
   static bool isCleanupEHSelector(int Selector) { return Selector == 0; }
   static bool isCatchEHSelector(int Selector) { return Selector > 0; }
 
 public:
   EHStreamer(AsmPrinter *A);
-  virtual ~EHStreamer();
+  ~EHStreamer() override;
 
   // Unused.
   void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
   void beginInstruction(const MachineInstr *MI) override {}
   void endInstruction() override {}
 };
 }
 
 #endif
 

lib/CodeGen/AsmPrinter/Win64Exception.h

class Win64Exception : public EHStreamer {
   const MCExpr *createImageRel32(const MCSymbol *Value);
   const MCExpr *createImageRel32(const GlobalValue *GV);
 
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.
   //
   Win64Exception(AsmPrinter *A);
-  virtual ~Win64Exception();
+  ~Win64Exception() override;
 
   /// Emit all exception information that should come after the content.
   void endModule() override;
 
   /// Gather pre-function exception information.  Assumes being emitted
   /// immediately after the function entry point.
   void beginFunction(const MachineFunction *MF) override;
 
   /// Gather and emit post-function exception information.
   void endFunction(const MachineFunction *) override;
 };
 }
 
 #endif
 

lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h

void clear() {
     InstrInfo.clear();
   }
 
   void emitDebugInfoForFunction(const Function *GV);
 
 public:
   WinCodeViewLineTables(AsmPrinter *Asm);
 
-  ~WinCodeViewLineTables() {
+  ~WinCodeViewLineTables() override {
     for (DirAndFilenameToFilepathMapTy::iterator
              I = DirAndFilenameToFilepathMap.begin(),
              E = DirAndFilenameToFilepathMap.end();
          I != E; ++I)
       free(I->second);
   }
 
   void setSymbolSize(const llvm::MCSymbol *, uint64_t) override {}

lib/CodeGen/CodeGenPrepare.cpp

InstructionRemover(Instruction *Inst, Value *New = nullptr)
         : TypePromotionAction(Inst), Inserter(Inst), Hider(Inst),
           Replacer(nullptr) {
       if (New)
         Replacer = new UsesReplacer(Inst, New);
       DEBUG(dbgs() << "Do: InstructionRemover: " << *Inst << "\n");
       Inst->removeFromParent();
     }
 
-    ~InstructionRemover() { delete Replacer; }
+    ~InstructionRemover() override { delete Replacer; }
 
     /// \brief Really remove the instruction.
     void commit() override { delete Inst; }
 
     /// \brief Resurrect the instruction and reassign it to the proper uses if
     /// new value was provided when build this action.
     void undo() override {
       DEBUG(dbgs() << "Undo: InstructionRemover: " << *Inst << "\n");

lib/CodeGen/CriticalAntiDepBreaker.h

class CriticalAntiDepBreaker : public AntiDepBreaker {
     std::vector<unsigned> DefIndices;
 
     /// A set of registers which are live and cannot be changed to
     /// break anti-dependencies.
     BitVector KeepRegs;
 
   public:
     CriticalAntiDepBreaker(MachineFunction& MFi, const RegisterClassInfo&);
-    ~CriticalAntiDepBreaker();
+    ~CriticalAntiDepBreaker() override;
 
     /// Initialize anti-dep breaking for a new basic block.
     void StartBlock(MachineBasicBlock *BB) override;
 
     /// Identifiy anti-dependencies along the critical path
     /// of the ScheduleDAG and break them by renaming registers.
     unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,
                                    MachineBasicBlock::iterator Begin,

lib/CodeGen/InlineSpiller.cpp

 private:
   // Values in RegsToSpill defined by sibling copies.
   typedef DenseMap<VNInfo*, SibValueInfo> SibValueMap;
   SibValueMap SibValues;
 
   // Dead defs generated during spilling.
   SmallVector<MachineInstr*, 8> DeadDefs;
 
-  ~InlineSpiller() {}
+  ~InlineSpiller() override {}
 
 public:
   InlineSpiller(MachineFunctionPass &pass, MachineFunction &mf, VirtRegMap &vrm)
       : MF(mf), LIS(pass.getAnalysis<LiveIntervals>()),
         LSS(pass.getAnalysis<LiveStacks>()),
         AA(&pass.getAnalysis<AliasAnalysis>()),
         MDT(pass.getAnalysis<MachineDominatorTree>()),
         Loops(pass.getAnalysis<MachineLoopInfo>()), VRM(vrm),

lib/CodeGen/LiveDebugVariables.h

 
 class LiveDebugVariables : public MachineFunctionPass {
   void *pImpl;
   DenseMap<const Function*, DISubprogram> FunctionDIs;
 public:
   static char ID; // Pass identification, replacement for typeid
 
   LiveDebugVariables();
-  ~LiveDebugVariables();
+  ~LiveDebugVariables() override;
 
   /// renameRegister - Move any user variables in OldReg to NewReg:SubIdx.
   /// @param OldReg Old virtual register that is going away.
   /// @param NewReg New register holding the user variables.
   /// @param SubIdx If NewReg is a virtual register, SubIdx may indicate a sub-
   ///               register.
   void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx);
 

lib/CodeGen/PostRASchedulerList.cpp

namespace {
 
   public:
     SchedulePostRATDList(
         MachineFunction &MF, MachineLoopInfo &MLI, AliasAnalysis *AA,
         const RegisterClassInfo &,
         TargetSubtargetInfo::AntiDepBreakMode AntiDepMode,
         SmallVectorImpl<const TargetRegisterClass *> &CriticalPathRCs);
 
-    ~SchedulePostRATDList();
+    ~SchedulePostRATDList() override;
 
     /// startBlock - Initialize register live-range state for scheduling in
     /// this block.
     ///
     void startBlock(MachineBasicBlock *BB) override;
 
     // Set the index of RegionEnd within the current BB.
     void setEndIndex(unsigned EndIdx) { EndIndex = EndIdx; }

lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp

ScheduleDAGRRList(MachineFunction &mf, bool needlatency,
 
     const TargetSubtargetInfo &STI = mf.getSubtarget();
     if (DisableSchedCycles || !NeedLatency)
       HazardRec = new ScheduleHazardRecognizer();
     else
       HazardRec = STI.getInstrInfo()->CreateTargetHazardRecognizer(&STI, this);
   }
 
-  ~ScheduleDAGRRList() {
+  ~ScheduleDAGRRList() override {
     delete HazardRec;
     delete AvailableQueue;
   }
 
   void Schedule() override;
 
   ScheduleHazardRecognizer *getHazardRec() { return HazardRec; }
 

lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h

public:
     SelectionDAG *DAG;                    // DAG of the current basic block
     const InstrItineraryData *InstrItins;
 
     /// The schedule. Null SUnit*'s represent noop instructions.
     std::vector<SUnit*> Sequence;
 
     explicit ScheduleDAGSDNodes(MachineFunction &mf);
 
-    virtual ~ScheduleDAGSDNodes() {}
+    ~ScheduleDAGSDNodes() override {}
 
     /// Run - perform scheduling.
     ///
     void Run(SelectionDAG *dag, MachineBasicBlock *bb);
 
     /// isPassiveNode - Return true if the node is a non-scheduled leaf.
     ///
     static bool isPassiveNode(SDNode *Node) {

lib/CodeGen/SelectionDAG/ScheduleDAGVLIW.cpp

public:
   ScheduleDAGVLIW(MachineFunction &mf,
                   AliasAnalysis *aa,
                   SchedulingPriorityQueue *availqueue)
     : ScheduleDAGSDNodes(mf), AvailableQueue(availqueue), AA(aa) {
     const TargetSubtargetInfo &STI = mf.getSubtarget();
     HazardRec = STI.getInstrInfo()->CreateTargetHazardRecognizer(&STI, this);
   }
 
-  ~ScheduleDAGVLIW() {
+  ~ScheduleDAGVLIW() override {
     delete HazardRec;
     delete AvailableQueue;
   }
 
   void Schedule() override;
 
 private:
   void releaseSucc(SUnit *SU, const SDep &D);

lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

class MatchStateUpdater : public SelectionDAG::DAGUpdateListener
       SmallVectorImpl<MatchScope> &MatchScopes;
 public:
   MatchStateUpdater(SelectionDAG &DAG,
                     SmallVectorImpl<std::pair<SDValue, SDNode*> > &RN,
                     SmallVectorImpl<MatchScope> &MS) :
     SelectionDAG::DAGUpdateListener(DAG),
     RecordedNodes(RN), MatchScopes(MS) { }
 
-  void NodeDeleted(SDNode *N, SDNode *E) {
+  void NodeDeleted(SDNode *N, SDNode *E) override {
     // Some early-returns here to avoid the search if we deleted the node or
     // if the update comes from MorphNodeTo (MorphNodeTo is the last thing we
     // do, so it's unnecessary to update matching state at that point).
     // Neither of these can occur currently because we only install this
     // update listener during matching a complex patterns.
     if (!E || E->isMachineOpcode())
       return;
     // Performing linear search here does not matter because we almost never

lib/CodeGen/SpillPlacement.h

class SpillPlacement : public MachineFunctionPass {
   /// Decision threshold. A node gets the output value 0 if the weighted sum of
   /// its inputs falls in the open interval (-Threshold;Threshold).
   BlockFrequency Threshold;
 
 public:
   static char ID; // Pass identification, replacement for typeid.
 
   SpillPlacement() : MachineFunctionPass(ID), nodes(nullptr) {}
-  ~SpillPlacement() { releaseMemory(); }
+  ~SpillPlacement() override { releaseMemory(); }
 
   /// BorderConstraint - A basic block has separate constraints for entry and
   /// exit.
   enum BorderConstraint {
     DontCare,  ///< Block doesn't care / variable not live.
     PrefReg,   ///< Block entry/exit prefers a register.
     PrefSpill, ///< Block entry/exit prefers a stack slot.
     PrefBoth,  ///< Block entry prefers both register and stack.

lib/CodeGen/WinEHPrepare.cpp

private:
   // outlined but before the outlined code is pruned from the parent function.
   DenseMap<const BasicBlock *, BasicBlock *> LPadTargetBlocks;
 };
 
 class WinEHFrameVariableMaterializer : public ValueMaterializer {
 public:
   WinEHFrameVariableMaterializer(Function *OutlinedFn,
                                  FrameVarInfoMap &FrameVarInfo);
-  ~WinEHFrameVariableMaterializer() {}
+  ~WinEHFrameVariableMaterializer() override {}
 
-  virtual Value *materializeValueFor(Value *V) override;
+  Value *materializeValueFor(Value *V) override;
 
   void escapeCatchObject(Value *V);
 
 private:
   FrameVarInfoMap &FrameVarInfo;
   IRBuilder<> Builder;
 };
 

lib/DebugInfo/DWARF/DWARFDebugFrame.cpp

CIE(uint64_t Offset, uint64_t Length, uint8_t Version,
       SmallString<8> Augmentation, uint64_t CodeAlignmentFactor,
       int64_t DataAlignmentFactor, uint64_t ReturnAddressRegister)
       : FrameEntry(FK_CIE, Offset, Length), Version(Version),
         Augmentation(std::move(Augmentation)),
         CodeAlignmentFactor(CodeAlignmentFactor),
         DataAlignmentFactor(DataAlignmentFactor),
         ReturnAddressRegister(ReturnAddressRegister) {}
 
-  ~CIE() {
-  }
+  ~CIE() override {}
 
   uint64_t getCodeAlignmentFactor() const { return CodeAlignmentFactor; }
   int64_t getDataAlignmentFactor() const { return DataAlignmentFactor; }
 
   void dumpHeader(raw_ostream &OS) const override {
     OS << format("%08x %08x %08x CIE",
                  (uint32_t)Offset, (uint32_t)Length, DW_CIE_ID)
        << "\n";
public:
   // is obtained lazily once it's actually required.
   FDE(uint64_t Offset, uint64_t Length, int64_t LinkedCIEOffset,
       uint64_t InitialLocation, uint64_t AddressRange,
       CIE *Cie)
       : FrameEntry(FK_FDE, Offset, Length), LinkedCIEOffset(LinkedCIEOffset),
         InitialLocation(InitialLocation), AddressRange(AddressRange),
         LinkedCIE(Cie) {}
 
-  ~FDE() {
-  }
+  ~FDE() override {}
 
   CIE *getLinkedCIE() const { return LinkedCIE; }
 
   void dumpHeader(raw_ostream &OS) const override {
     OS << format("%08x %08x %08x FDE ",
                  (uint32_t)Offset, (uint32_t)Length, (int32_t)LinkedCIEOffset);
     OS << format("cie=%08x pc=%08x...%08x\n",
                  (int32_t)LinkedCIEOffset,

lib/DebugInfo/PDB/PDBSymbolFunc.cpp

while (auto Child = DataChildren->getNext()) {
           continue;
         Args.push_back(std::move(Child));
         SeenNames.insert(Name);
       }
     }
     reset();
   }
 
-  uint32_t getChildCount() const { return Args.size(); }
+  uint32_t getChildCount() const override { return Args.size(); }
 
-  std::unique_ptr<PDBSymbolData> getChildAtIndex(uint32_t Index) const {
+  std::unique_ptr<PDBSymbolData>
+  getChildAtIndex(uint32_t Index) const override {
     if (Index >= Args.size())
       return nullptr;
 
     return Session.getConcreteSymbolById<PDBSymbolData>(
         Args[Index]->getSymIndexId());
   }
 
-  std::unique_ptr<PDBSymbolData> getNext() {
+  std::unique_ptr<PDBSymbolData> getNext() override {
     if (CurIter == Args.end())
       return nullptr;
     const auto &Result = **CurIter;
     ++CurIter;
     return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
   }
 
-  void reset() { CurIter = Args.empty() ? Args.end() : Args.begin(); }
+  void reset() override { CurIter = Args.empty() ? Args.end() : Args.begin(); }
 
-  FunctionArgEnumerator *clone() const {
+  FunctionArgEnumerator *clone() const override {
     return new FunctionArgEnumerator(Session, Func);
   }
 
 private:
   typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
   const IPDBSession &Session;
   const PDBSymbolFunc &Func;
   ArgListType Args;

lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp

FunctionArgEnumerator(const IPDBSession &PDBSession,
                         const PDBSymbolTypeFunctionSig &Sig)
       : Session(PDBSession),
         Enumerator(Sig.findAllChildren<PDBSymbolTypeFunctionArg>()) {}
 
   FunctionArgEnumerator(const IPDBSession &PDBSession,
                         std::unique_ptr<ArgEnumeratorType> ArgEnumerator)
       : Session(PDBSession), Enumerator(std::move(ArgEnumerator)) {}
 
-  uint32_t getChildCount() const { return Enumerator->getChildCount(); }
+  uint32_t getChildCount() const override {
+    return Enumerator->getChildCount();
+  }
 
-  std::unique_ptr<PDBSymbol> getChildAtIndex(uint32_t Index) const {
+  std::unique_ptr<PDBSymbol> getChildAtIndex(uint32_t Index) const override {
     auto FunctionArgSymbol = Enumerator->getChildAtIndex(Index);
     if (!FunctionArgSymbol)
       return nullptr;
     return Session.getSymbolById(FunctionArgSymbol->getTypeId());
   }
 
-  std::unique_ptr<PDBSymbol> getNext() {
+  std::unique_ptr<PDBSymbol> getNext() override {
     auto FunctionArgSymbol = Enumerator->getNext();
     if (!FunctionArgSymbol)
       return nullptr;
     return Session.getSymbolById(FunctionArgSymbol->getTypeId());
   }
 
-  void reset() { Enumerator->reset(); }
+  void reset() override { Enumerator->reset(); }
 
-  MyType *clone() const {
+  MyType *clone() const override {
     std::unique_ptr<ArgEnumeratorType> Clone(Enumerator->clone());
     return new FunctionArgEnumerator(Session, std::move(Clone));
   }
 
 private:
   const IPDBSession &Session;
   std::unique_ptr<ArgEnumeratorType> Enumerator;
 };

lib/ExecutionEngine/ExecutionEngineBindings.cpp

struct SimpleBindingMMFunctions {
   LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory;
   LLVMMemoryManagerDestroyCallback Destroy;
 };
 
 class SimpleBindingMemoryManager : public RTDyldMemoryManager {
 public:
   SimpleBindingMemoryManager(const SimpleBindingMMFunctions& Functions,
                              void *Opaque);
-  virtual ~SimpleBindingMemoryManager();
+  ~SimpleBindingMemoryManager() override;
 
   uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID,
                                StringRef SectionName) override;
 
   uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID, StringRef SectionName,
                                bool isReadOnly) override;

lib/ExecutionEngine/GDBRegistrationListener.cpp

class GDBJITRegistrationListener : public JITEventListener {
   RegisteredObjectBufferMap ObjectBufferMap;
 
 public:
   /// Instantiates the JIT service.
   GDBJITRegistrationListener() : ObjectBufferMap() {}
 
   /// Unregisters each object that was previously registered and releases all
   /// internal resources.
-  virtual ~GDBJITRegistrationListener();
+  ~GDBJITRegistrationListener() override;
 
   /// Creates an entry in the JIT registry for the buffer @p Object,
   /// which must contain an object file in executable memory with any
   /// debug information for the debugger.
   void NotifyObjectEmitted(const ObjectFile &Object,
                            const RuntimeDyld::LoadedObjectInfo &L) override;
 
   /// Removes the internal registration of @p Object, and

lib/ExecutionEngine/Interpreter/Interpreter.h

class Interpreter : public ExecutionEngine, public InstVisitor<Interpreter> {
   std::vector<ExecutionContext> ECStack;
 
   // AtExitHandlers - List of functions to call when the program exits,
   // registered with the atexit() library function.
   std::vector<Function*> AtExitHandlers;
 
 public:
   explicit Interpreter(std::unique_ptr<Module> M);
-  ~Interpreter();
+  ~Interpreter() override;
 
   /// runAtExitHandlers - Run any functions registered by the program's calls to
   /// atexit(3), which we intercept and store in AtExitHandlers.
   ///
   void runAtExitHandlers();
 
   static void Register() {
     InterpCtor = create;

lib/ExecutionEngine/MCJIT/MCJIT.h

Function *FindFunctionNamedInModulePtrSet(const char *FnName,
                                             ModulePtrSet::iterator I,
                                             ModulePtrSet::iterator E);
 
   void runStaticConstructorsDestructorsInModulePtrSet(bool isDtors,
                                                       ModulePtrSet::iterator I,
                                                       ModulePtrSet::iterator E);
 
 public:
-  ~MCJIT();
+  ~MCJIT() override;
 
   /// @name ExecutionEngine interface implementation
   /// @{
   void addModule(std::unique_ptr<Module> M) override;
   void addObjectFile(std::unique_ptr<object::ObjectFile> O) override;
   void addObjectFile(object::OwningBinary<object::ObjectFile> O) override;
   void addArchive(object::OwningBinary<object::Archive> O) override;
   bool removeModule(Module *M) override;

lib/ExecutionEngine/Orc/OrcMCJITReplacement.h

private:
     OrcMCJITReplacement &M;
     std::shared_ptr<MCJITMemoryManager> ClientMM;
   };
 
   class LinkingResolver : public RuntimeDyld::SymbolResolver {
   public:
     LinkingResolver(OrcMCJITReplacement &M) : M(M) {}
 
-    RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) {
+    RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
       return M.findMangledSymbol(Name);
     }
 
-    RuntimeDyld::SymbolInfo findSymbolInLogicalDylib(const std::string &Name) {
+    RuntimeDyld::SymbolInfo
+    findSymbolInLogicalDylib(const std::string &Name) override {
       return M.ClientResolver->findSymbolInLogicalDylib(Name);
     }
 
   private:
     OrcMCJITReplacement &M;
   };
 
 private:

lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h

class RuntimeDyldELF : public RuntimeDyldImpl {
   // in a table until we receive a request to register all unregistered
   // EH frame sections with the memory manager.
   SmallVector<SID, 2> UnregisteredEHFrameSections;
   SmallVector<SID, 2> RegisteredEHFrameSections;
 
 public:
   RuntimeDyldELF(RuntimeDyld::MemoryManager &MemMgr,
                  RuntimeDyld::SymbolResolver &Resolver);
-  virtual ~RuntimeDyldELF();
+  ~RuntimeDyldELF() override;
 
   std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
   loadObject(const object::ObjectFile &O) override;
 
   void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override;
   relocation_iterator
   processRelocationRef(unsigned SectionID, relocation_iterator RelI,
                        const ObjectFile &Obj,

lib/IR/LegacyPassManager.cpp

 /// sequences them to process one module.
 class MPPassManager : public Pass, public PMDataManager {
 public:
   static char ID;
   explicit MPPassManager() :
     Pass(PT_PassManager, ID), PMDataManager() { }
 
   // Delete on the fly managers.
-  virtual ~MPPassManager() {
+  ~MPPassManager() override {
     for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
            I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
          I != E; ++I) {
       FunctionPassManagerImpl *FPP = I->second;
       delete FPP;
     }
   }
 

lib/MC/ELFObjectWriter.cpp

void reset() override {
       StrTabBuilder.clear();
       FileSymbolData.clear();
       LocalSymbolData.clear();
       ExternalSymbolData.clear();
       UndefinedSymbolData.clear();
       MCObjectWriter::reset();
     }
 
-    virtual ~ELFObjectWriter();
+    ~ELFObjectWriter() override;
 
     void WriteWord(uint64_t W) {
       if (is64Bit())
         Write64(W);
       else
         Write32(W);
     }
 

lib/MC/MCParser/AsmParser.cpp

private:
   bool IsDarwin;
 
   /// \brief Are we parsing ms-style inline assembly?
   bool ParsingInlineAsm;
 
 public:
   AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
             const MCAsmInfo &MAI);
-  virtual ~AsmParser();
+  ~AsmParser() override;
 
   bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
 
   void addDirectiveHandler(StringRef Directive,
                            ExtensionDirectiveHandler Handler) override {
     ExtensionDirectiveMap[Directive] = Handler;
   }
 

lib/Support/CommandLine.cpp

bool cl::ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer,
   return AllExpanded;
 }
 
 namespace {
 class StrDupSaver : public StringSaver {
   std::vector<char *> Dups;
 
 public:
-  ~StrDupSaver() {
+  ~StrDupSaver() override {
     for (std::vector<char *>::iterator I = Dups.begin(), E = Dups.end(); I != E;
          ++I) {
       char *Dup = *I;
       free(Dup);
     }
   }
   const char *SaveString(const char *Str) override {
     char *Dup = strdup(Str);

lib/Support/DataStream.cpp

 namespace {
 
 // Very simple stream backed by a file. Mostly useful for stdin and debugging;
 // actual file access is probably still best done with mmap.
 class DataFileStreamer : public DataStreamer {
  int Fd;
 public:
   DataFileStreamer() : Fd(0) {}
-  virtual ~DataFileStreamer() {
-    close(Fd);
-  }
+  ~DataFileStreamer() override { close(Fd); }
   size_t GetBytes(unsigned char *buf, size_t len) override {
     NumStreamFetches++;
     return read(Fd, buf, len);
   }
 
   std::error_code OpenFile(const std::string &Filename) {
     if (Filename == "-") {
       Fd = 0;

lib/Target/AArch64/MCTargetDesc/AArch64ELFObjectWriter.cpp

 
 using namespace llvm;
 
 namespace {
 class AArch64ELFObjectWriter : public MCELFObjectTargetWriter {
 public:
   AArch64ELFObjectWriter(uint8_t OSABI, bool IsLittleEndian);
 
-  virtual ~AArch64ELFObjectWriter();
+  ~AArch64ELFObjectWriter() override;
 
 protected:
   unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                         bool IsPCRel) const override;
 
 private:
 };
 }

lib/Target/AArch64/MCTargetDesc/AArch64ELFStreamer.cpp

 public:
   friend class AArch64TargetELFStreamer;
 
   AArch64ELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
                    MCCodeEmitter *Emitter)
       : MCELFStreamer(Context, TAB, OS, Emitter), MappingSymbolCounter(0),
         LastEMS(EMS_None) {}
 
-  ~AArch64ELFStreamer() {}
+  ~AArch64ELFStreamer() override {}
 
   void ChangeSection(const MCSection *Section,
                      const MCExpr *Subsection) override {
     // We have to keep track of the mapping symbol state of any sections we
     // use. Each one should start off as EMS_None, which is provided as the
     // default constructor by DenseMap::lookup.
     LastMappingSymbols[getPreviousSection().first] = LastEMS;
     LastEMS = LastMappingSymbols.lookup(Section);

lib/Target/AArch64/MCTargetDesc/AArch64MCCodeEmitter.cpp

 class AArch64MCCodeEmitter : public MCCodeEmitter {
   MCContext &Ctx;
 
   AArch64MCCodeEmitter(const AArch64MCCodeEmitter &); // DO NOT IMPLEMENT
   void operator=(const AArch64MCCodeEmitter &);     // DO NOT IMPLEMENT
 public:
   AArch64MCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx) : Ctx(ctx) {}
 
-  ~AArch64MCCodeEmitter() {}
+  ~AArch64MCCodeEmitter() override {}
 
   // getBinaryCodeForInstr - TableGen'erated function for getting the
   // binary encoding for an instruction.
   uint64_t getBinaryCodeForInstr(const MCInst &MI,
                                  SmallVectorImpl<MCFixup> &Fixups,
                                  const MCSubtargetInfo &STI) const;
 
   /// getMachineOpValue - Return binary encoding of operand. If the machine

lib/Target/ARM/ARMConstantPoolValue.h

for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
             return i;
       }
     }
 
     return -1;
   }
 
 public:
-  virtual ~ARMConstantPoolValue();
+  ~ARMConstantPoolValue() override;
 
   ARMCP::ARMCPModifier getModifier() const { return Modifier; }
   const char *getModifierText() const;
   bool hasModifier() const { return Modifier != ARMCP::no_modifier; }
 
   bool mustAddCurrentAddress() const { return AddCurrentAddress; }
 
   unsigned getLabelId() const { return LabelId; }

lib/Target/ARM/Disassembler/ARMDisassembler.cpp

 namespace {
 /// ARM disassembler for all ARM platforms.
 class ARMDisassembler : public MCDisassembler {
 public:
   ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
     MCDisassembler(STI, Ctx) {
   }
 
-  ~ARMDisassembler() {}
+  ~ARMDisassembler() override {}
 
   DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
                               ArrayRef<uint8_t> Bytes, uint64_t Address,
                               raw_ostream &VStream,
                               raw_ostream &CStream) const override;
 };
 
 /// Thumb disassembler for all Thumb platforms.
 class ThumbDisassembler : public MCDisassembler {
 public:
   ThumbDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
     MCDisassembler(STI, Ctx) {
   }
 
-  ~ThumbDisassembler() {}
+  ~ThumbDisassembler() override {}
 
   DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
                               ArrayRef<uint8_t> Bytes, uint64_t Address,
                               raw_ostream &VStream,
                               raw_ostream &CStream) const override;
 
 private:
   mutable ITStatus ITBlock;

lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp

class ARMELFObjectWriter : public MCELFObjectTargetWriter {
     unsigned GetRelocTypeInner(const MCValue &Target,
                                const MCFixup &Fixup,
                                bool IsPCRel) const;
 
 
   public:
     ARMELFObjectWriter(uint8_t OSABI);
 
-    virtual ~ARMELFObjectWriter();
+    ~ARMELFObjectWriter() override;
 
     unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsPCRel) const override;
 
     bool needsRelocateWithSymbol(const MCSymbolData &SD,
                                  unsigned Type) const override;
   };
 }

lib/Target/ARM/MCTargetDesc/ARMMCCodeEmitter.cpp

class ARMMCCodeEmitter : public MCCodeEmitter {
   const MCContext &CTX;
   bool IsLittleEndian;
 
 public:
   ARMMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx, bool IsLittle)
     : MCII(mcii), CTX(ctx), IsLittleEndian(IsLittle) {
   }
 
-  ~ARMMCCodeEmitter() {}
+  ~ARMMCCodeEmitter() override {}
 
   bool isThumb(const MCSubtargetInfo &STI) const {
     return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
   }
   bool isThumb2(const MCSubtargetInfo &STI) const {
     return isThumb(STI) && (STI.getFeatureBits() & ARM::FeatureThumb2) != 0;
   }
   bool isTargetMachO(const MCSubtargetInfo &STI) const {

lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp

 
 namespace {
 class ARMWinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
 public:
   ARMWinCOFFObjectWriter(bool Is64Bit)
     : MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_ARMNT) {
     assert(!Is64Bit && "AArch64 support not yet implemented");
   }
-  virtual ~ARMWinCOFFObjectWriter() { }
+  ~ARMWinCOFFObjectWriter() override {}
 
   unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
                         bool IsCrossSection,
                         const MCAsmBackend &MAB) const override;
 
   bool recordRelocation(const MCFixup &) const override;
 };
 

lib/Target/Hexagon/MCTargetDesc/HexagonELFObjectWriter.cpp

 
 class HexagonELFObjectWriter : public MCELFObjectTargetWriter {
 private:
   StringRef CPU;
 
 public:
   HexagonELFObjectWriter(uint8_t OSABI, StringRef C);
 
-  virtual unsigned GetRelocType(MCValue const &Target, MCFixup const &Fixup,
-                                bool IsPCRel) const override;
+  unsigned GetRelocType(MCValue const &Target, MCFixup const &Fixup,
 };
 }
 
 HexagonELFObjectWriter::HexagonELFObjectWriter(uint8_t OSABI, StringRef C)
     : MCELFObjectTargetWriter(/*Is64bit*/ false, OSABI, ELF::EM_HEXAGON,
                               /*HasRelocationAddend*/ true),
       CPU(C) {}
 

 }
 
 MCObjectWriter *llvm::createHexagonELFObjectWriter(raw_ostream &OS,
                                                    uint8_t OSABI,
                                                    StringRef CPU) {
   MCELFObjectTargetWriter *MOTW = new HexagonELFObjectWriter(OSABI, CPU);
   return createELFObjectWriter(MOTW, OS, /*IsLittleEndian*/ true);
 }
 No newline at end of file

lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp

 using namespace llvm;
 
 namespace {
   class MipsELFObjectWriter : public MCELFObjectTargetWriter {
   public:
     MipsELFObjectWriter(bool _is64Bit, uint8_t OSABI,
                         bool _isN64, bool IsLittleEndian);
 
-    virtual ~MipsELFObjectWriter();
+    ~MipsELFObjectWriter() override;
 
     unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsPCRel) const override;
     bool needsRelocateWithSymbol(const MCSymbolData &SD,
                                  unsigned Type) const override;
   };
 }
 

lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.h

class MipsMCCodeEmitter : public MCCodeEmitter {
   bool IsLittleEndian;
 
   bool isMicroMips(const MCSubtargetInfo &STI) const;
 
 public:
   MipsMCCodeEmitter(const MCInstrInfo &mcii, MCContext &Ctx_, bool IsLittle)
       : MCII(mcii), Ctx(Ctx_), IsLittleEndian(IsLittle) {}
 
-  ~MipsMCCodeEmitter() {}
+  ~MipsMCCodeEmitter() override {}
 
   void EmitByte(unsigned char C, raw_ostream &OS) const;
 
   void EmitInstruction(uint64_t Val, unsigned Size, const MCSubtargetInfo &STI,
                        raw_ostream &OS) const;
 
   void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
                          SmallVectorImpl<MCFixup> &Fixups,

lib/Target/Mips/MCTargetDesc/MipsNaClELFStreamer.cpp

 /// instructions.
 
 class MipsNaClELFStreamer : public MipsELFStreamer {
 public:
   MipsNaClELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
                       MCCodeEmitter *Emitter)
       : MipsELFStreamer(Context, TAB, OS, Emitter), PendingCall(false) {}
 
-  ~MipsNaClELFStreamer() {}
+  ~MipsNaClELFStreamer() override {}
 
 private:
   // Whether we started the sandboxing sequence for calls.  Calls are bundled
   // with branch delays and aligned to the bundle end.
   bool PendingCall;
 
   bool isIndirectJump(const MCInst &MI) {
     if (MI.getOpcode() == Mips::JALR) {

lib/Target/Mips/MipsOptionRecord.h

MipsRegInfoRecord(MipsELFStreamer *S, MCContext &Context)
     GPR64RegClass = &(TRI->getRegClass(Mips::GPR64RegClassID));
     FGR32RegClass = &(TRI->getRegClass(Mips::FGR32RegClassID));
     FGR64RegClass = &(TRI->getRegClass(Mips::FGR64RegClassID));
     AFGR64RegClass = &(TRI->getRegClass(Mips::AFGR64RegClassID));
     MSA128BRegClass = &(TRI->getRegClass(Mips::MSA128BRegClassID));
     COP2RegClass = &(TRI->getRegClass(Mips::COP2RegClassID));
     COP3RegClass = &(TRI->getRegClass(Mips::COP3RegClassID));
   }
-  ~MipsRegInfoRecord() {}
+  ~MipsRegInfoRecord() override {}
 
   void EmitMipsOptionRecord() override;
   void SetPhysRegUsed(unsigned Reg, const MCRegisterInfo *MCRegInfo);
 
 private:
   MipsELFStreamer *Streamer;
   MCContext &Context;
   const MCRegisterClass *GPR32RegClass;

lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp

 
 typedef MCDisassembler::DecodeStatus DecodeStatus;
 
 namespace {
 class PPCDisassembler : public MCDisassembler {
 public:
   PPCDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
     : MCDisassembler(STI, Ctx) {}
-  virtual ~PPCDisassembler() {}
+  ~PPCDisassembler() override {}
 
   DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
                               ArrayRef<uint8_t> Bytes, uint64_t Address,
                               raw_ostream &VStream,
                               raw_ostream &CStream) const override;
 };
 } // end anonymous namespace
 

lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp

class PPCMCCodeEmitter : public MCCodeEmitter {
   const MCContext &CTX;
   bool IsLittleEndian;
 
 public:
   PPCMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
       : MCII(mcii), CTX(ctx),
         IsLittleEndian(ctx.getAsmInfo()->isLittleEndian()) {}
 
-  ~PPCMCCodeEmitter() {}
+  ~PPCMCCodeEmitter() override {}
 
   unsigned getDirectBrEncoding(const MCInst &MI, unsigned OpNo,
                                SmallVectorImpl<MCFixup> &Fixups,
                                const MCSubtargetInfo &STI) const;
   unsigned getCondBrEncoding(const MCInst &MI, unsigned OpNo,
                              SmallVectorImpl<MCFixup> &Fixups,
                              const MCSubtargetInfo &STI) const;
   unsigned getAbsDirectBrEncoding(const MCInst &MI, unsigned OpNo,

lib/Target/PowerPC/PPCTargetStreamer.h

 #define LLVM_LIB_TARGET_POWERPC_PPCTARGETSTREAMER_H
 
 #include "llvm/MC/MCStreamer.h"
 
 namespace llvm {
 class PPCTargetStreamer : public MCTargetStreamer {
 public:
   PPCTargetStreamer(MCStreamer &S);
-  virtual ~PPCTargetStreamer();
+  ~PPCTargetStreamer() override;
   virtual void emitTCEntry(const MCSymbol &S) = 0;
   virtual void emitMachine(StringRef CPU) = 0;
   virtual void emitAbiVersion(int AbiVersion) = 0;
   virtual void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) = 0;
 };
 }
 
 #endif

lib/Target/R600/MCTargetDesc/SIMCCodeEmitter.cpp

class SIMCCodeEmitter : public  AMDGPUMCCodeEmitter {
   /// \brief Encode an fp or int literal
   uint32_t getLitEncoding(const MCOperand &MO, unsigned OpSize) const;
 
 public:
   SIMCCodeEmitter(const MCInstrInfo &mcii, const MCRegisterInfo &mri,
                   MCContext &ctx)
     : MCII(mcii), MRI(mri), Ctx(ctx) { }
 
-  ~SIMCCodeEmitter() { }
+  ~SIMCCodeEmitter() override {}
 
   /// \brief Encode the instruction and write it to the OS.
   void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
                          SmallVectorImpl<MCFixup> &Fixups,
                          const MCSubtargetInfo &STI) const override;
 
   /// \returns the encoding for an MCOperand.
   uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,

lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp

 namespace {
   class SparcELFObjectWriter : public MCELFObjectTargetWriter {
   public:
     SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI)
       : MCELFObjectTargetWriter(Is64Bit, OSABI,
                                 Is64Bit ?  ELF::EM_SPARCV9 : ELF::EM_SPARC,
                                 /*HasRelocationAddend*/ true) {}
 
-    virtual ~SparcELFObjectWriter() {}
+    ~SparcELFObjectWriter() override {}
+
   protected:
     unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsPCRel) const override;
   };
 }
 
 unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target,
                                             const MCFixup &Fixup,

lib/Target/Sparc/MCTargetDesc/SparcMCCodeEmitter.cpp

 class SparcMCCodeEmitter : public MCCodeEmitter {
   SparcMCCodeEmitter(const SparcMCCodeEmitter &) = delete;
   void operator=(const SparcMCCodeEmitter &) = delete;
   MCContext &Ctx;
 
 public:
   SparcMCCodeEmitter(MCContext &ctx): Ctx(ctx) {}
 
-  ~SparcMCCodeEmitter() {}
+  ~SparcMCCodeEmitter() override {}
 
   void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
                          SmallVectorImpl<MCFixup> &Fixups,
                          const MCSubtargetInfo &STI) const override;
 
   // getBinaryCodeForInstr - TableGen'erated function for getting the
   // binary encoding for an instruction.
   uint64_t getBinaryCodeForInstr(const MCInst &MI,

lib/Target/Sparc/SparcSelectionDAGInfo.h

 
 namespace llvm {
 
 class SparcTargetMachine;
 
 class SparcSelectionDAGInfo : public TargetSelectionDAGInfo {
 public:
   explicit SparcSelectionDAGInfo(const DataLayout &DL);
-  ~SparcSelectionDAGInfo();
+  ~SparcSelectionDAGInfo() override;
 };
 
 }
 
 #endif

lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp

 
 typedef MCDisassembler::DecodeStatus DecodeStatus;
 
 namespace {
 class SystemZDisassembler : public MCDisassembler {
 public:
   SystemZDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
     : MCDisassembler(STI, Ctx) {}
-  virtual ~SystemZDisassembler() {}
+  ~SystemZDisassembler() override {}
 
   DecodeStatus getInstruction(MCInst &instr, uint64_t &Size,
                               ArrayRef<uint8_t> Bytes, uint64_t Address,
                               raw_ostream &VStream,
                               raw_ostream &CStream) const override;
 };
 } // end anonymous namespace
 

lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp

class SystemZMCCodeEmitter : public MCCodeEmitter {
   const MCInstrInfo &MCII;
   MCContext &Ctx;
 
 public:
   SystemZMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
     : MCII(mcii), Ctx(ctx) {
   }
 
-  ~SystemZMCCodeEmitter() {}
+  ~SystemZMCCodeEmitter() override {}
 
   // OVerride MCCodeEmitter.
   void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
                          SmallVectorImpl<MCFixup> &Fixups,
                          const MCSubtargetInfo &STI) const override;
 
 private:
   // Automatically generated by TableGen.

lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp

 
 using namespace llvm;
 
 namespace {
 class SystemZObjectWriter : public MCELFObjectTargetWriter {
 public:
   SystemZObjectWriter(uint8_t OSABI);
 
-  virtual ~SystemZObjectWriter();
+  ~SystemZObjectWriter() override;
 
 protected:
   // Override MCELFObjectTargetWriter.
   unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                         bool IsPCRel) const override;
 };
 } // end anonymous namespace
 

lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp

 
 using namespace llvm;
 
 namespace {
   class X86ELFObjectWriter : public MCELFObjectTargetWriter {
   public:
     X86ELFObjectWriter(bool IsELF64, uint8_t OSABI, uint16_t EMachine);
 
-    virtual ~X86ELFObjectWriter();
+    ~X86ELFObjectWriter() override;
+
   protected:
     unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsPCRel) const override;
   };
 }
 
 X86ELFObjectWriter::X86ELFObjectWriter(bool IsELF64, uint8_t OSABI,
                                        uint16_t EMachine)

lib/Target/X86/MCTargetDesc/X86MCCodeEmitter.cpp

class X86MCCodeEmitter : public MCCodeEmitter {
   void operator=(const X86MCCodeEmitter &) = delete;
   const MCInstrInfo &MCII;
   MCContext &Ctx;
 public:
   X86MCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
     : MCII(mcii), Ctx(ctx) {
   }
 
-  ~X86MCCodeEmitter() {}
+  ~X86MCCodeEmitter() override {}
 
   bool is64BitMode(const MCSubtargetInfo &STI) const {
     return (STI.getFeatureBits() & X86::Mode64Bit) != 0;
   }
 
   bool is32BitMode(const MCSubtargetInfo &STI) const {
     return (STI.getFeatureBits() & X86::Mode32Bit) != 0;
   }

lib/Target/X86/MCTargetDesc/X86WinCOFFObjectWriter.cpp

 namespace llvm {
   class MCObjectWriter;
 }
 
 namespace {
   class X86WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
   public:
     X86WinCOFFObjectWriter(bool Is64Bit);
-    virtual ~X86WinCOFFObjectWriter();
+    ~X86WinCOFFObjectWriter() override;
 
     unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsCrossSection,
                           const MCAsmBackend &MAB) const override;
   };
 }
 
 X86WinCOFFObjectWriter::X86WinCOFFObjectWriter(bool Is64Bit)

lib/Target/XCore/XCoreTargetStreamer.h

 #define LLVM_LIB_TARGET_XCORE_XCORETARGETSTREAMER_H
 
 #include "llvm/MC/MCStreamer.h"
 
 namespace llvm {
 class XCoreTargetStreamer : public MCTargetStreamer {
 public:
   XCoreTargetStreamer(MCStreamer &S);
-  virtual ~XCoreTargetStreamer();
+  ~XCoreTargetStreamer() override;
   virtual void emitCCTopData(StringRef Name) = 0;
   virtual void emitCCTopFunction(StringRef Name) = 0;
   virtual void emitCCBottomData(StringRef Name) = 0;
   virtual void emitCCBottomFunction(StringRef Name) = 0;
 };
 }
 
 #endif

lib/Transforms/Scalar/AlignmentFromAssumptions.cpp

 
 namespace {
 struct AlignmentFromAssumptions : public FunctionPass {
   static char ID; // Pass identification, replacement for typeid
   AlignmentFromAssumptions() : FunctionPass(ID) {
     initializeAlignmentFromAssumptionsPass(*PassRegistry::getPassRegistry());
   }
 
-  bool runOnFunction(Function &F);
+  bool runOnFunction(Function &F) override;
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<AssumptionCacheTracker>();
     AU.addRequired<ScalarEvolution>();
     AU.addRequired<DominatorTreeWrapperPass>();
 
     AU.setPreservesCFG();
     AU.addPreserved<LoopInfoWrapperPass>();
     AU.addPreserved<DominatorTreeWrapperPass>();
     AU.addPreserved<ScalarEvolution>();

tools/bugpoint/ToolRunner.h

public:
   LLC(const std::string &llcPath, GCC *Gcc,
       const std::vector<std::string> *Args,
       bool useIntegratedAssembler)
     : LLCPath(llcPath), gcc(Gcc),
       UseIntegratedAssembler(useIntegratedAssembler) {
     ToolArgs.clear();
     if (Args) ToolArgs = *Args;
   }
-  ~LLC() { delete gcc; }
+  ~LLC() override { delete gcc; }
 
   /// compileProgram - Compile the specified program from bitcode to executable
   /// code.  This does not produce any output, it is only used when debugging
   /// the code generator.  Returns false if the code generator fails.
   void compileProgram(const std::string &Bitcode, std::string *Error,
                       unsigned Timeout = 0, unsigned MemoryLimit = 0) override;
 
   int ExecuteProgram(const std::string &Bitcode,

tools/lli/RemoteMemoryManager.h

private:
   // the generated code is moved to the remote target.
   sys::MemoryBlock Near;
   sys::MemoryBlock allocateSection(uintptr_t Size);
 
   RemoteTarget *Target;
 
 public:
   RemoteMemoryManager() : Target(nullptr) {}
-  virtual ~RemoteMemoryManager();
+  ~RemoteMemoryManager() override;
 
   uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID,
                                StringRef SectionName) override;
 
   uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID, StringRef SectionName,
                                bool IsReadOnly) override;

tools/lli/RemoteTargetExternal.h

bool create() override {
 
     return true;
   }
 
   /// Terminate the remote process.
   void stop() override;
 
   RemoteTargetExternal(std::string &Name) : RemoteTarget(), ChildName(Name) {}
-  virtual ~RemoteTargetExternal() {}
+  ~RemoteTargetExternal() override {}
 
 private:
   std::string ChildName;
 
   bool SendAllocateSpace(uint32_t Alignment, uint32_t Size);
   bool SendLoadSection(uint64_t Addr,
                        const void *Data,
                        uint32_t Size,

tools/lli/lli.cpp

 class LLIObjectCache : public ObjectCache {
 public:
   LLIObjectCache(const std::string& CacheDir) : CacheDir(CacheDir) {
     // Add trailing '/' to cache dir if necessary.
     if (!this->CacheDir.empty() &&
         this->CacheDir[this->CacheDir.size() - 1] != '/')
       this->CacheDir += '/';
   }
-  virtual ~LLIObjectCache() {}
+  ~LLIObjectCache() override {}
 
   void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
     const std::string ModuleID = M->getModuleIdentifier();
     std::string CacheName;
     if (!getCacheFilename(ModuleID, CacheName))
       return;
     if (!CacheDir.empty()) { // Create user-defined cache dir.
       SmallString<128> dir(CacheName);

unittests/ADT/DAGDeltaAlgorithmTest.cpp

 
 typedef DAGDeltaAlgorithm::edge_ty edge_ty;
 
 class FixedDAGDeltaAlgorithm : public DAGDeltaAlgorithm {
   changeset_ty FailingSet;
   unsigned NumTests;
 
 protected:
-  virtual bool ExecuteOneTest(const changeset_ty &Changes) {
+  bool ExecuteOneTest(const changeset_ty &Changes) override {
     ++NumTests;
     return std::includes(Changes.begin(), Changes.end(),
                          FailingSet.begin(), FailingSet.end());
   }
 
 public:
   FixedDAGDeltaAlgorithm(const changeset_ty &_FailingSet)
     : FailingSet(_FailingSet),

unittests/ADT/DeltaAlgorithmTest.cpp

 
 namespace {
 
 class FixedDeltaAlgorithm final : public DeltaAlgorithm {
   changeset_ty FailingSet;
   unsigned NumTests;
 
 protected:
-  virtual bool ExecuteOneTest(const changeset_ty &Changes) {
+  bool ExecuteOneTest(const changeset_ty &Changes) override {
     ++NumTests;
     return std::includes(Changes.begin(), Changes.end(),
                          FailingSet.begin(), FailingSet.end());
   }
 
 public:
   FixedDeltaAlgorithm(const changeset_ty &_FailingSet)
     : FailingSet(_FailingSet),

unittests/ADT/SmallVectorTest.cpp

 
 LLVM_ATTRIBUTE_USED void CompileTest() {
   SmallVector<NonCopyable, 0> V;
   V.resize(42);
 }
 
 class SmallVectorTestBase : public testing::Test {
 protected:
-
-  void SetUp() {
-    Constructable::reset();
-  }
+  void SetUp() override { Constructable::reset(); }
 
   template <typename VectorT>
   void assertEmpty(VectorT & v) {
     // Size tests
     EXPECT_EQ(0u, v.size());
     EXPECT_TRUE(v.empty());
 
     // Iterator tests

unittests/Analysis/CFGTest.cpp

public:
                                     "", &ID, nullptr, true, true);
         PassRegistry::getPassRegistry()->registerPass(*PI, false);
         initializeLoopInfoWrapperPassPass(*PassRegistry::getPassRegistry());
         initializeDominatorTreeWrapperPassPass(
             *PassRegistry::getPassRegistry());
         return 0;
       }
 
-      void getAnalysisUsage(AnalysisUsage &AU) const {
+      void getAnalysisUsage(AnalysisUsage &AU) const override {
         AU.setPreservesAll();
         AU.addRequired<LoopInfoWrapperPass>();
         AU.addRequired<DominatorTreeWrapperPass>();
       }
 
-      bool runOnFunction(Function &F) {
+      bool runOnFunction(Function &F) override {
         if (!F.hasName() || F.getName() != "test")
           return false;
 
         LoopInfo *LI = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
         DominatorTree *DT =
             &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
         EXPECT_EQ(isPotentiallyReachable(A, B, nullptr, nullptr),
                   ExpectedResult);

unittests/Analysis/ScalarEvolutionTest.cpp

 namespace llvm {
 namespace {
 
 // We use this fixture to ensure that we clean up ScalarEvolution before
 // deleting the PassManager.
 class ScalarEvolutionsTest : public testing::Test {
 protected:
   ScalarEvolutionsTest() : M("", Context), SE(*new ScalarEvolution) {}
-  ~ScalarEvolutionsTest() {
+  ~ScalarEvolutionsTest() override {
     // Manually clean up, since we allocated new SCEV objects after the
     // pass was finished.
     SE.releaseMemory();
   }
   LLVMContext Context;
   Module M;
   legacy::PassManager PM;
   ScalarEvolution &SE;

unittests/ExecutionEngine/ExecutionEngineTest.cpp

 
 protected:
   ExecutionEngineTest() {
     auto Owner = make_unique<Module>("<main>", getGlobalContext());
     M = Owner.get();
     Engine.reset(EngineBuilder(std::move(Owner)).setErrorStr(&Error).create());
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     ASSERT_TRUE(Engine.get() != nullptr) << "EngineBuilder returned error: '"
       << Error << "'";
   }
 
   GlobalVariable *NewExtGlobal(Type *T, const Twine &Name) {
     return new GlobalVariable(*M, T, false,  // Not constant.
                               GlobalValue::ExternalLinkage, nullptr, Name);
   }

unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp

public:
   uintptr_t UsedDataSizeRO;
   uintptr_t ReservedDataSizeRW;
   uintptr_t UsedDataSizeRW;
   
   TestReserveAllocationSpaceMemoryManager() : 
     ReservedCodeSize(0), UsedCodeSize(0), ReservedDataSizeRO(0), 
     UsedDataSizeRO(0), ReservedDataSizeRW(0), UsedDataSizeRW(0) {    
   }
-  
-  virtual bool needsToReserveAllocationSpace() {
-    return true;
-  }
+  bool needsToReserveAllocationSpace() override { return true; }
 
-  virtual void reserveAllocationSpace(
-      uintptr_t CodeSize, uintptr_t DataSizeRO, uintptr_t DataSizeRW) {
+  void reserveAllocationSpace(uintptr_t CodeSize, uintptr_t DataSizeRO,
+                              uintptr_t DataSizeRW) override {
     ReservedCodeSize = CodeSize;
     ReservedDataSizeRO = DataSizeRO;
     ReservedDataSizeRW = DataSizeRW;
   }
 
   void useSpace(uintptr_t* UsedSize, uintptr_t Size, unsigned Alignment) {
     uintptr_t AlignedSize = (Size + Alignment - 1) / Alignment * Alignment;
     uintptr_t AlignedBegin = (*UsedSize + Alignment - 1) / Alignment * Alignment;
     *UsedSize = AlignedBegin + AlignedSize;
   }
 
-  virtual uint8_t* allocateDataSection(uintptr_t Size, unsigned Alignment,
-      unsigned SectionID, StringRef SectionName, bool IsReadOnly) {
+  uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID, StringRef SectionName,
+                               bool IsReadOnly) override {
     useSpace(IsReadOnly ? &UsedDataSizeRO : &UsedDataSizeRW, Size, Alignment);
     return SectionMemoryManager::allocateDataSection(Size, Alignment, 
       SectionID, SectionName, IsReadOnly);
   }
 
-  uint8_t* allocateCodeSection(uintptr_t Size, unsigned Alignment, 
-      unsigned SectionID, StringRef SectionName) {
+  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID,
+                               StringRef SectionName) override {
     useSpace(&UsedCodeSize, Size, Alignment);
     return SectionMemoryManager::allocateCodeSection(Size, Alignment, 
       SectionID, SectionName);
   }
 };
 
 class MCJITCAPITest : public testing::Test, public MCJITTestAPICommon {
 protected:
MCJITCAPITest() {
     HasSubArchs.push_back(Triple::arm);
     SupportedSubArchs.push_back("armv6");
     SupportedSubArchs.push_back("armv7");
 
     // The operating systems below are known to be sufficiently incompatible
     // that they will fail the MCJIT C API tests.
     UnsupportedEnvironments.push_back(Triple::Cygnus);
   }
-  
-  virtual void SetUp() {
+  void SetUp() override {
     didCallAllocateCodeSection = false;
     didAllocateCompactUnwindSection = false;
     didCallYield = false;
     Module = nullptr;
     Function = nullptr;
     Engine = nullptr;
     Error = nullptr;
   }
-  
-  virtual void TearDown() {
+  void TearDown() override {
     if (Engine)
       LLVMDisposeExecutionEngine(Engine);
     else if (Module)
       LLVMDisposeModule(Module);
   }
   
   void buildSimpleFunction() {
     Module = LLVMModuleCreateWithName("simple_module");

unittests/ExecutionEngine/MCJIT/MCJITObjectCacheTest.cpp

void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
     // If we've seen this module before, note that.
     const std::string ModuleID = M->getModuleIdentifier();
     if (ObjMap.find(ModuleID) != ObjMap.end())
       DuplicateInserted = true;
     // Store a copy of the buffer in our map.
     ObjMap[ModuleID] = copyBuffer(Obj);
   }
 
-  virtual std::unique_ptr<MemoryBuffer> getObject(const Module* M) override {
+  std::unique_ptr<MemoryBuffer> getObject(const Module *M) override {
     const MemoryBuffer* BufferFound = getObjectInternal(M);
     ModulesLookedUp.insert(M->getModuleIdentifier());
     if (!BufferFound)
       return nullptr;
     // Our test cache wants to maintain ownership of its object buffers
     // so we make a copy here for the execution engine.
     return MemoryBuffer::getMemBufferCopy(BufferFound->getBuffer());
   }

 class MCJITObjectCacheTest : public testing::Test, public MCJITTestBase {
 protected:
 
   enum {
     OriginalRC = 6,
     ReplacementRC = 7
   };
 
-  virtual void SetUp() {
+  void SetUp() override {
     M.reset(createEmptyModule("<main>"));
     Main = insertMainFunction(M.get(), OriginalRC);
   }
 
   void compileAndRun(int ExpectedRC = OriginalRC) {
     // This function shouldn't be called until after SetUp.
     ASSERT_TRUE(bool(TheJIT));
     ASSERT_TRUE(nullptr != Main);

unittests/ExecutionEngine/MCJIT/MCJITTest.cpp

 #include "gtest/gtest.h"
 
 using namespace llvm;
 
 namespace {
 
 class MCJITTest : public testing::Test, public MCJITTestBase {
 protected:
-  virtual void SetUp() { M.reset(createEmptyModule("<main>")); }
+  void SetUp() override { M.reset(createEmptyModule("<main>")); }
 };
 
 // FIXME: Ensure creating an execution engine does not crash when constructed
 //        with a null module.
 /*
 TEST_F(MCJITTest, null_module) {
   createJIT(0);
 }

unittests/IR/DominatorTreeTest.cpp

 using namespace llvm;
 
 namespace llvm {
   void initializeDPassPass(PassRegistry&);
 
   namespace {
     struct DPass : public FunctionPass {
       static char ID;
-      virtual bool runOnFunction(Function &F) {
+      bool runOnFunction(Function &F) override {
         DominatorTree *DT =
             &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
         PostDominatorTree *PDT = &getAnalysis<PostDominatorTree>();
         Function::iterator FI = F.begin();
 
         BasicBlock *BB0 = FI++;
         BasicBlock::iterator BBI = BB0->begin();
         Instruction *Y1 = BBI++;
struct DPass : public FunctionPass {
         PostDominatedBBs.clear();
         DT->getDescendants(BB3, DominatedBBs);
         DT->getDescendants(BB3, PostDominatedBBs);
         EXPECT_EQ(DominatedBBs.size(), 0UL);
         EXPECT_EQ(PostDominatedBBs.size(), 0UL);
 
         return false;
       }
-      virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      void getAnalysisUsage(AnalysisUsage &AU) const override {
         AU.addRequired<DominatorTreeWrapperPass>();
         AU.addRequired<PostDominatorTree>();
       }
       DPass() : FunctionPass(ID) {
         initializeDPassPass(*PassRegistry::getPassRegistry());
       }
     };
     char DPass::ID = 0;

unittests/IR/IRBuilderTest.cpp

 #include "gtest/gtest.h"
 
 using namespace llvm;
 
 namespace {
 
 class IRBuilderTest : public testing::Test {
 protected:
-  virtual void SetUp() {
+  void SetUp() override {
     M.reset(new Module("MyModule", Ctx));
     FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
                                           /*isVarArg=*/false);
     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
     BB = BasicBlock::Create(Ctx, "", F);
     GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true,
                             GlobalValue::ExternalLinkage, nullptr);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     BB = nullptr;
     M.reset();
   }
 
   LLVMContext Ctx;
   std::unique_ptr<Module> M;
   Function *F;
   BasicBlock *BB;

unittests/IR/ValueHandleTest.cpp

TEST_F(ValueHandle, CallbackVH_CallbackOnDeletion) {
   public:
     int DeletedCalls;
     int AURWCalls;
 
     RecordingVH() : DeletedCalls(0), AURWCalls(0) {}
     RecordingVH(Value *V) : CallbackVH(V), DeletedCalls(0), AURWCalls(0) {}
 
   private:
-    virtual void deleted() { DeletedCalls++; CallbackVH::deleted(); }
-    virtual void allUsesReplacedWith(Value *) { AURWCalls++; }
+    void deleted() override {
+      DeletedCalls++;
+      CallbackVH::deleted();
+    }
+    void allUsesReplacedWith(Value *) override { AURWCalls++; }
   };
 
   RecordingVH RVH;
   RVH = BitcastV.get();
   EXPECT_EQ(0, RVH.DeletedCalls);
   EXPECT_EQ(0, RVH.AURWCalls);
   BitcastV.reset();
   EXPECT_EQ(1, RVH.DeletedCalls);
   EXPECT_EQ(0, RVH.AURWCalls);
 }
 
 TEST_F(ValueHandle, CallbackVH_CallbackOnRAUW) {
   class RecordingVH : public CallbackVH {
   public:
     int DeletedCalls;
     Value *AURWArgument;
 
     RecordingVH() : DeletedCalls(0), AURWArgument(nullptr) {}
     RecordingVH(Value *V)
       : CallbackVH(V), DeletedCalls(0), AURWArgument(nullptr) {}
 
   private:
-    virtual void deleted() { DeletedCalls++; CallbackVH::deleted(); }
-    virtual void allUsesReplacedWith(Value *new_value) {
+    void deleted() override {
+      DeletedCalls++;
+      CallbackVH::deleted();
+    }
+    void allUsesReplacedWith(Value *new_value) override {
       EXPECT_EQ(nullptr, AURWArgument);
       AURWArgument = new_value;
     }
   };
 
   RecordingVH RVH;
   RVH = BitcastV.get();
   EXPECT_EQ(0, RVH.DeletedCalls);
public:
 
     RecoveringVH() : DeletedCalls(0), AURWArgument(nullptr), 
                      Context(&getGlobalContext()) {}
     RecoveringVH(Value *V)
       : CallbackVH(V), DeletedCalls(0), AURWArgument(nullptr), 
         Context(&getGlobalContext()) {}
 
   private:
-    virtual void deleted() {
+    void deleted() override {
       getValPtr()->replaceAllUsesWith(Constant::getNullValue(Type::getInt32Ty(getGlobalContext())));
       setValPtr(nullptr);
     }
-    virtual void allUsesReplacedWith(Value *new_value) {
+    void allUsesReplacedWith(Value *new_value) override {
       ASSERT_TRUE(nullptr != getValPtr());
       EXPECT_EQ(1U, getValPtr()->getNumUses());
       EXPECT_EQ(nullptr, AURWArgument);
       AURWArgument = new_value;
     }
   };
 
   // Normally, if a value has uses, deleting it will crash.  However, we can use
TEST_F(ValueHandle, DestroyingOtherVHOnSameValueDoesntBreakIteration) {
   class DestroyingVH : public CallbackVH {
   public:
     std::unique_ptr<WeakVH> ToClear[2];
     DestroyingVH(Value *V) {
       ToClear[0].reset(new WeakVH(V));
       setValPtr(V);
       ToClear[1].reset(new WeakVH(V));
     }
-    virtual void deleted() {
+    void deleted() override {
       ToClear[0].reset();
       ToClear[1].reset();
       CallbackVH::deleted();
     }
-    virtual void allUsesReplacedWith(Value *) {
+    void allUsesReplacedWith(Value *) override {
       ToClear[0].reset();
       ToClear[1].reset();
     }
   };
 
   {
     WeakVH ShouldBeVisited1(BitcastV.get());
     DestroyingVH C(BitcastV.get());
public:
     AssertingVH<Value> *ToClear[2];
     ClearingVH(Value *V,
                AssertingVH<Value> &A0, AssertingVH<Value> &A1)
       : CallbackVH(V) {
       ToClear[0] = &A0;
       ToClear[1] = &A1;
     }
 
-    virtual void deleted() {
+    void deleted() override {
       *ToClear[0] = nullptr;
       *ToClear[1] = nullptr;
       CallbackVH::deleted();
     }
   };
 
   AssertingVH<Value> A1, A2;
   A1 = BitcastV.get();
   ClearingVH C(BitcastV.get(), A1, A2);
   A2 = BitcastV.get();
   // C.deleted() should run first, clearing the two AssertingVHs,
   // which should prevent them from asserting.
   BitcastV.reset();
 }
 
 }

unittests/LineEditor/LineEditor.cpp

public:
   }
 
   void init() {
     sys::fs::createTemporaryFile("temp", "history", HistPath);
     ASSERT_FALSE(HistPath.empty());
     LE = new LineEditor("test", HistPath);
   }
 
-  ~LineEditorTest() {
+  ~LineEditorTest() override {
     delete LE;
     sys::fs::remove(HistPath.str());
   }
 };
 
 TEST_F(LineEditorTest, HistorySaveLoad) {
   LE->saveHistory();
   LE->loadHistory();

unittests/Linker/LinkModulesTest.cpp

 #include "gtest/gtest.h"
 
 using namespace llvm;
 
 namespace {
 
 class LinkModuleTest : public testing::Test {
 protected:
-  virtual void SetUp() {
+  void SetUp() override {
     M.reset(new Module("MyModule", Ctx));
     FunctionType *FTy = FunctionType::get(
         Type::getInt8PtrTy(Ctx), Type::getInt32Ty(Ctx), false /*=isVarArg*/);
     F = Function::Create(FTy, Function::ExternalLinkage, "ba_func", M.get());
     F->setCallingConv(CallingConv::C);
 
     EntryBB = BasicBlock::Create(Ctx, "entry", F);
     SwitchCase1BB = BasicBlock::Create(Ctx, "switch.case.1", F);
void SetUp() override {
     ConstantInt *One = ConstantInt::get(Type::getInt32Ty(Ctx), 1);
     Constant *OnePtr = ConstantExpr::getCast(Instruction::IntToPtr, One,
                                              Type::getInt8PtrTy(Ctx));
     Init.push_back(OnePtr);
 
     GV->setInitializer(ConstantArray::get(AT, Init));
   }
 
-  virtual void TearDown() { M.reset(); }
+  void TearDown() override { M.reset(); }
 
   LLVMContext Ctx;
   std::unique_ptr<Module> M;
   Function *F;
   ArrayType *AT;
   GlobalVariable *GV;
   BasicBlock *EntryBB;
   BasicBlock *SwitchCase1BB;

unittests/Support/AlignOfTest.cpp

 struct D4 : S2 { int x; };
 struct D5 : S3 { char c; };
 struct D6 : S2, S3 {};
 struct D7 : S1, S3 {};
 struct D8 : S1, D4, D5 { double x[2]; };
 struct D9 : S1, D1 { S1 s1; };
 struct V1 { virtual ~V1(); };
 struct V2 { int x; virtual ~V2(); };
-struct V3 : V1 { virtual ~V3(); };
-struct V4 : virtual V2 { int y; virtual ~V4(); };
-struct V5 : V4, V3 { double z; virtual ~V5(); };
+struct V3 : V1 {
+  ~V3() override;
+};
+struct V4 : virtual V2 { int y;
+  ~V4() override;
+};
+struct V5 : V4, V3 { double z;
+  ~V5() override;
+};
 struct V6 : S1 { virtual ~V6(); };
-struct V7 : virtual V2, virtual V6 { virtual ~V7(); };
-struct V8 : V5, virtual V6, V7 { double zz; virtual ~V8(); };
+struct V7 : virtual V2, virtual V6 {
+  ~V7() override;
+};
+struct V8 : V5, virtual V6, V7 { double zz;
+  ~V8() override;
+};
 
 double S6::f() { return 0.0; }
 float D2::g() { return 0.0f; }
 V1::~V1() {}
 V2::~V2() {}
 V3::~V3() {}
 V4::~V4() {}
 V5::~V5() {}

unittests/Support/CommandLineTest.cpp

public:
   template<class M0t, class M1t, class M2t>
   StackOption(const M0t &M0, const M1t &M1, const M2t &M2) : Base(M0, M1, M2) {}
 
   // Four options...
   template<class M0t, class M1t, class M2t, class M3t>
   StackOption(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
     : Base(M0, M1, M2, M3) {}
 
-  ~StackOption() {
-    this->removeArgument();
-  }
+  ~StackOption() override { this->removeArgument(); }
 };
 
 
 cl::OptionCategory TestCategory("Test Options", "Description");
 TEST(CommandLineTest, ModifyExisitingOption) {
   StackOption<int> TestOption("test-option", cl::desc("old description"));
 
   const char Description[] = "New description";

unittests/Support/MemoryBufferTest.cpp

 namespace {
 
 class MemoryBufferTest : public testing::Test {
 protected:
   MemoryBufferTest()
   : data("this is some data")
   { }
 
-  virtual void SetUp() { }
+  void SetUp() override {}
 
   /// Common testing for different modes of getOpenFileSlice.
   /// Creates a temporary file with known contents, and uses
   /// MemoryBuffer::getOpenFileSlice to map it.
   /// If \p Reopen is true, the file is closed after creating and reopened
   /// anew before using MemoryBuffer.
   void testGetOpenFileSlice(bool Reopen);
 

unittests/Support/Path.cpp

 }
 
 class FileSystemTest : public testing::Test {
 protected:
   /// Unique temporary directory in which all created filesystem entities must
   /// be placed. It is removed at the end of each test (must be empty).
   SmallString<128> TestDirectory;
 
-  virtual void SetUp() {
+  void SetUp() override {
     ASSERT_NO_ERROR(
         fs::createUniqueDirectory("file-system-test", TestDirectory));
     // We don't care about this specific file.
     errs() << "Test Directory: " << TestDirectory << '\n';
     errs().flush();
   }
 
-  virtual void TearDown() {
-    ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
-  }
+  void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
 };
 
 TEST_F(FileSystemTest, Unique) {
   // Create a temp file.
   int FileDescriptor;
   SmallString<64> TempPath;
   ASSERT_NO_ERROR(
       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));

unittests/Transforms/Utils/Cloning.cpp

 #include "gtest/gtest.h"
 
 using namespace llvm;
 
 namespace {
 
 class CloneInstruction : public ::testing::Test {
 protected:
-  virtual void SetUp() {
-    V = nullptr;
-  }
+  void SetUp() override { V = nullptr; }
 
   template <typename T>
   T *clone(T *V1) {
     Value *V2 = V1->clone();
     Orig.insert(V1);
     Clones.insert(V2);
     return cast<T>(V2);
   }
 
   void eraseClones() {
     DeleteContainerPointers(Clones);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     eraseClones();
     DeleteContainerPointers(Orig);
     delete V;
   }
 
   SmallPtrSet<Value *, 4> Orig;   // Erase on exit
   SmallPtrSet<Value *, 4> Clones; // Erase in eraseClones
 
TEST_F(CloneInstruction, CallingConvention) {
   EXPECT_EQ(CallingConv::Cold, F2->getCallingConv());
 
   delete F1;
   delete F2;
 }
 
 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);
   }
 
   void CreateOldFunc() {
     FunctionType* FuncType = FunctionType::get(Type::getVoidTy(C), false);
     OldFunc = Function::Create(FuncType, GlobalValue::PrivateLinkage, "f", M);

utils/TableGen/DAGISelMatcher.h

 /// one that successfully matches.  If one child fails, it tries the next child.
 /// If none of the children match then this check fails.  It never has a 'next'.
 class ScopeMatcher : public Matcher {
   SmallVector<Matcher*, 4> Children;
 public:
   ScopeMatcher(ArrayRef<Matcher *> children)
     : Matcher(Scope), Children(children.begin(), children.end()) {
   }
-  virtual ~ScopeMatcher();
+  ~ScopeMatcher() override;
 
   unsigned getNumChildren() const { return Children.size(); }
 
   Matcher *getChild(unsigned i) { return Children[i]; }
   const Matcher *getChild(unsigned i) const { return Children[i]; }
 
   void resetChild(unsigned i, Matcher *N) {
     delete Children[i];

 /// to one matcher per opcode.  If the opcode doesn't match any of the cases,
 /// then the match fails.  This is semantically equivalent to a Scope node where
 /// every child does a CheckOpcode, but is much faster.
 class SwitchOpcodeMatcher : public Matcher {
   SmallVector<std::pair<const SDNodeInfo*, Matcher*>, 8> Cases;
 public:
   SwitchOpcodeMatcher(ArrayRef<std::pair<const SDNodeInfo*, Matcher*> > cases)
     : Matcher(SwitchOpcode), Cases(cases.begin(), cases.end()) {}
-  virtual ~SwitchOpcodeMatcher();
+  ~SwitchOpcodeMatcher() override;
 
   static inline bool classof(const Matcher *N) {
     return N->getKind() == SwitchOpcode;
   }
 
   unsigned getNumCases() const { return Cases.size(); }
 
   const SDNodeInfo &getCaseOpcode(unsigned i) const { return *Cases[i].first; }

 /// to one matcher per case.  If the type doesn't match any of the cases,
 /// then the match fails.  This is semantically equivalent to a Scope node where
 /// every child does a CheckType, but is much faster.
 class SwitchTypeMatcher : public Matcher {
   SmallVector<std::pair<MVT::SimpleValueType, Matcher*>, 8> Cases;
 public:
   SwitchTypeMatcher(ArrayRef<std::pair<MVT::SimpleValueType, Matcher*> > cases)
   : Matcher(SwitchType), Cases(cases.begin(), cases.end()) {}
-  virtual ~SwitchTypeMatcher();
+  ~SwitchTypeMatcher() override;
 
   static inline bool classof(const Matcher *N) {
     return N->getKind() == SwitchType;
   }
 
   unsigned getNumCases() const { return Cases.size(); }
 
   MVT::SimpleValueType getCaseType(unsigned i) const { return Cases[i].first; }

utils/unittest/googletest/include/gtest/gtest-spi.h

public:
   // thread. DEPRECATED
   explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
 
   // Same as above, but you can choose the interception scope of this object.
   ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
                                    TestPartResultArray* result);
 
   // The d'tor restores the previous test part result reporter.
-  virtual ~ScopedFakeTestPartResultReporter();
+  ~ScopedFakeTestPartResultReporter() override;
 
   // Appends the TestPartResult object to the TestPartResultArray
   // received in the constructor.
   //
   // This method is from the TestPartResultReporterInterface
   // interface.
-  virtual void ReportTestPartResult(const TestPartResult& result);
+  void ReportTestPartResult(const TestPartResult &result) override;
+
  private:
   void Init();
 
   const InterceptMode intercept_mode_;
   TestPartResultReporterInterface* old_reporter_;
   TestPartResultArray* const result_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);

utils/unittest/googletest/include/gtest/gtest-test-part.h

 // current test part result reporter. Besides checking if fatal failures were
 // reported, it only delegates the reporting to the former result reporter.
 // The original result reporter is restored in the destructor.
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 class GTEST_API_ HasNewFatalFailureHelper
     : public TestPartResultReporterInterface {
  public:
   HasNewFatalFailureHelper();
-  virtual ~HasNewFatalFailureHelper();
-  virtual void ReportTestPartResult(const TestPartResult& result);
+  ~HasNewFatalFailureHelper() override;
+  void ReportTestPartResult(const TestPartResult &result) override;
   bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
  private:
   bool has_new_fatal_failure_;
   TestPartResultReporterInterface* original_reporter_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
 };
 
 }  // namespace internal
 
 }  // namespace testing
 
 #endif  // GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_

utils/unittest/googletest/include/gtest/gtest.h

 // The convenience class for users who need to override just one or two
 // methods and are not concerned that a possible change to a signature of
 // the methods they override will not be caught during the build.  For
 // comments about each method please see the definition of TestEventListener
 // above.
 class EmptyTestEventListener : public TestEventListener {
   virtual void anchor();
  public:
-  virtual void OnTestProgramStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                                    int /*iteration*/) {}
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-  virtual void OnTestStart(const TestInfo& /*test_info*/) {}
-  virtual void OnTestPartResult(const TestPartResult& /*test_part_result*/) {}
-  virtual void OnTestEnd(const TestInfo& /*test_info*/) {}
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                                  int /*iteration*/) {}
-  virtual void OnTestProgramEnd(const UnitTest& /*unit_test*/) {}
+   void OnTestProgramStart(const UnitTest & /*unit_test*/) override {}
+   void OnTestIterationStart(const UnitTest & /*unit_test*/,
+                             int /*iteration*/) override {}
+   void OnEnvironmentsSetUpStart(const UnitTest & /*unit_test*/) override {}
+   void OnEnvironmentsSetUpEnd(const UnitTest & /*unit_test*/) override {}
+   void OnTestCaseStart(const TestCase & /*test_case*/) override {}
+   void OnTestStart(const TestInfo & /*test_info*/) override {}
+   void OnTestPartResult(const TestPartResult & /*test_part_result*/) override {
+   }
+   void OnTestEnd(const TestInfo & /*test_info*/) override {}
+   void OnTestCaseEnd(const TestCase & /*test_case*/) override {}
+   void OnEnvironmentsTearDownStart(const UnitTest & /*unit_test*/) override {}
+   void OnEnvironmentsTearDownEnd(const UnitTest & /*unit_test*/) override {}
+   void OnTestIterationEnd(const UnitTest & /*unit_test*/,
+                           int /*iteration*/) override {}
+   void OnTestProgramEnd(const UnitTest & /*unit_test*/) override {}
 };
 
 // TestEventListeners lets users add listeners to track events in Google Test.
 class GTEST_API_ TestEventListeners {
  public:
   TestEventListeners();
   ~TestEventListeners();
 

utils/unittest/googletest/include/gtest/internal/gtest-death-test-internal.h

public:
   virtual ~DeathTestFactory();
   virtual bool Create(const char* statement, const RE* regex,
                       const char* file, int line, DeathTest** test) = 0;
 };
 
 // A concrete DeathTestFactory implementation for normal use.
 class DefaultDeathTestFactory : public DeathTestFactory {
  public:
-  virtual bool Create(const char* statement, const RE* regex,
-                      const char* file, int line, DeathTest** test);
+   bool Create(const char *statement, const RE *regex, const char *file,
+               int line, DeathTest **test) override;
 };
 
 // Returns true if exit_status describes a process that was terminated
 // by a signal, or exited normally with a nonzero exit code.
 GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
 
 // Traps C++ exceptions escaping statement and reports them as test
 // failures. Note that trapping SEH exceptions is not implemented here.

utils/unittest/googletest/include/gtest/internal/gtest-internal.h

private:
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
 };
 
 // This class provides implementation of TeastFactoryBase interface.
 // It is used in TEST and TEST_F macros.
 template <class TestClass>
 class TestFactoryImpl : public TestFactoryBase {
  public:
-  virtual Test* CreateTest() { return new TestClass; }
+   Test *CreateTest() override { return new TestClass; }
 };
 
 #if GTEST_OS_WINDOWS
 
 // Predicate-formatters for implementing the HRESULT checking macros
 // {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
 // We pass a long instead of HRESULT to avoid causing an
 // include dependency for the HRESULT type.

utils/unittest/googletest/include/gtest/internal/gtest-param-util.h

 // since the source can be located on the stack, and the generator
 // is likely to persist beyond that stack frame.
 template <typename T>
 class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
  public:
   template <typename ForwardIterator>
   ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
       : container_(begin, end) {}
-  virtual ~ValuesInIteratorRangeGenerator() {}
+  ~ValuesInIteratorRangeGenerator() override {}
 
-  virtual ParamIteratorInterface<T>* Begin() const {
+  ParamIteratorInterface<T> *Begin() const override {
     return new Iterator(this, container_.begin());
   }
-  virtual ParamIteratorInterface<T>* End() const {
+  ParamIteratorInterface<T> *End() const override {
     return new Iterator(this, container_.end());
   }
 
  private:
   typedef typename ::std::vector<T> ContainerType;
 
   class Iterator : public ParamIteratorInterface<T> {
    public:
     Iterator(const ParamGeneratorInterface<T>* base,
              typename ContainerType::const_iterator iterator)
         : base_(base), iterator_(iterator) {}
-    virtual ~Iterator() {}
+    ~Iterator() override {}
 
-    virtual const ParamGeneratorInterface<T>* BaseGenerator() const {
+    const ParamGeneratorInterface<T> *BaseGenerator() const override {
       return base_;
     }
-    virtual void Advance() {
+    void Advance() override {
       ++iterator_;
       value_.reset();
     }
-    virtual ParamIteratorInterface<T>* Clone() const {
+    ParamIteratorInterface<T> *Clone() const override {
       return new Iterator(*this);
     }
     // We need to use cached value referenced by iterator_ because *iterator_
     // can return a temporary object (and of type other then T), so just
     // having "return &*iterator_;" doesn't work.
     // value_ is updated here and not in Advance() because Advance()
     // can advance iterator_ beyond the end of the range, and we cannot
     // detect that fact. The client code, on the other hand, is
     // responsible for not calling Current() on an out-of-range iterator.
-    virtual const T* Current() const {
+    const T *Current() const override {
       if (value_.get() == NULL)
         value_.reset(new T(*iterator_));
       return value_.get();
     }
-    virtual bool Equals(const ParamIteratorInterface<T>& other) const {
+    bool Equals(const ParamIteratorInterface<T> &other) const override {
       // Having the same base generator guarantees that the other
       // iterator is of the same type and we can downcast.
       GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
           << "The program attempted to compare iterators "
           << "from different generators." << std::endl;
       return iterator_ ==
           CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
     }

 // Stores a parameter value and later creates tests parameterized with that
 // value.
 template <class TestClass>
 class ParameterizedTestFactory : public TestFactoryBase {
  public:
   typedef typename TestClass::ParamType ParamType;
   explicit ParameterizedTestFactory(ParamType parameter) :
       parameter_(parameter) {}
-  virtual Test* CreateTest() {
+  Test *CreateTest() override {
     TestClass::SetParam(&parameter_);
     return new TestClass();
   }
 
  private:
   const ParamType parameter_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);

 template <class TestCase>
 class TestMetaFactory
     : public TestMetaFactoryBase<typename TestCase::ParamType> {
  public:
   typedef typename TestCase::ParamType ParamType;
 
   TestMetaFactory() {}
 
-  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) {
+  TestFactoryBase *CreateTestFactory(ParamType parameter) override {
     return new ParameterizedTestFactory<TestCase>(parameter);
   }
 
  private:
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
 };
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
public:
   typedef typename TestCase::ParamType ParamType;
   // A function that returns an instance of appropriate generator type.
   typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
 
   explicit ParameterizedTestCaseInfo(const char* name)
       : test_case_name_(name) {}
 
   // Test case base name for display purposes.
-  virtual const string& GetTestCaseName() const { return test_case_name_; }
+  const string &GetTestCaseName() const override { return test_case_name_; }
   // Test case id to verify identity.
-  virtual TypeId GetTestCaseTypeId() const { return GetTypeId<TestCase>(); }
+  TypeId GetTestCaseTypeId() const override { return GetTypeId<TestCase>(); }
   // TEST_P macro uses AddTestPattern() to record information
   // about a single test in a LocalTestInfo structure.
   // test_case_name is the base name of the test case (without invocation
   // prefix). test_base_name is the name of an individual test without
   // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
   // test case base name and DoBar is test base name.
   void AddTestPattern(const char* test_case_name,
                       const char* test_base_name,
int AddTestCaseInstantiation(const string& instantiation_name,
     instantiations_.push_back(::std::make_pair(instantiation_name, func));
     return 0;  // Return value used only to run this method in namespace scope.
   }
   // UnitTest class invokes this method to register tests in this test case
   // test cases right before running tests in RUN_ALL_TESTS macro.
   // This method should not be called more then once on any single
   // instance of a ParameterizedTestCaseInfoBase derived class.
   // UnitTest has a guard to prevent from calling this method more then once.
-  virtual void RegisterTests() {
+  void RegisterTests() override {
     for (typename TestInfoContainer::iterator test_it = tests_.begin();
          test_it != tests_.end(); ++test_it) {
       linked_ptr<TestInfo> test_info = *test_it;
       for (typename InstantiationContainer::iterator gen_it =
                instantiations_.begin(); gen_it != instantiations_.end();
                ++gen_it) {
         const string& instantiation_name = gen_it->first;
         ParamGenerator<ParamType> generator((*gen_it->second)());

utils/unittest/googletest/include/gtest/internal/gtest-port.h

ThreadWithParam(
         thread_can_start_(thread_can_start),
         finished_(false) {
     ThreadWithParamBase* const base = this;
     // The thread can be created only after all fields except thread_
     // have been initialized.
     GTEST_CHECK_POSIX_SUCCESS_(
         pthread_create(&thread_, 0, &ThreadFuncWithCLinkage, base));
   }
-  ~ThreadWithParam() { Join(); }
+  ~ThreadWithParam() override { Join(); }
 
   void Join() {
     if (!finished_) {
       GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, 0));
       finished_ = true;
     }
   }
 
-  virtual void Run() {
+  void Run() override {
     if (thread_can_start_ != NULL)
       thread_can_start_->WaitForNotification();
     func_(param_);
   }
 
  private:
   const UserThreadFunc func_;  // User-supplied thread function.
   const T param_;  // User-supplied parameter to the thread function.

utils/unittest/googletest/src/gtest-death-test.cc

DeathTestImpl(const char* a_statement, const RE* a_regex)
         regex_(a_regex),
         spawned_(false),
         status_(-1),
         outcome_(IN_PROGRESS),
         read_fd_(-1),
         write_fd_(-1) {}
 
   // read_fd_ is expected to be closed and cleared by a derived class.
-  ~DeathTestImpl() { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
+  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
 
-  void Abort(AbortReason reason);
-  virtual bool Passed(bool status_ok);
+  void Abort(AbortReason reason) override;
+  bool Passed(bool status_ok) override;
 
   const char* statement() const { return statement_; }
   const RE* regex() const { return regex_; }
   bool spawned() const { return spawned_; }
   void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
   int status() const { return status_; }
   void set_status(int a_status) { status_ = a_status; }
   DeathTestOutcome outcome() const { return outcome_; }

 // ForkingDeathTest provides implementations for most of the abstract
 // methods of the DeathTest interface.  Only the AssumeRole method is
 // left undefined.
 class ForkingDeathTest : public DeathTestImpl {
  public:
   ForkingDeathTest(const char* statement, const RE* regex);
 
   // All of these virtual functions are inherited from DeathTest.
-  virtual int Wait();
+  int Wait() override;
 
  protected:
   void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
 
  private:
   // PID of child process during death test; 0 in the child process itself.
   pid_t child_pid_;
 };

 }
 
 // A concrete death test class that forks, then immediately runs the test
 // in the child process.
 class NoExecDeathTest : public ForkingDeathTest {
  public:
   NoExecDeathTest(const char* a_statement, const RE* a_regex) :
       ForkingDeathTest(a_statement, a_regex) { }
-  virtual TestRole AssumeRole();
+  TestRole AssumeRole() override;
 };
 
 // The AssumeRole process for a fork-and-run death test.  It implements a
 // straightforward fork, with a simple pipe to transmit the status byte.
 DeathTest::TestRole NoExecDeathTest::AssumeRole() {
   const size_t thread_count = GetThreadCount();
   if (thread_count != 1) {
     GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);

 // A concrete death test class that forks and re-executes the main
 // program from the beginning, with command-line flags set that cause
 // only this specific death test to be run.
 class ExecDeathTest : public ForkingDeathTest {
  public:
   ExecDeathTest(const char* a_statement, const RE* a_regex,
                 const char* file, int line) :
       ForkingDeathTest(a_statement, a_regex), file_(file), line_(line) { }
-  virtual TestRole AssumeRole();
+  TestRole AssumeRole() override;
+
  private:
   // The name of the file in which the death test is located.
   const char* const file_;
   // The line number on which the death test is located.
   const int line_;
 };
 
 // Utility class for accumulating command-line arguments.

utils/unittest/googletest/src/gtest-internal-inl.h

  private:
   GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
 };
 
 // A working implementation of the OsStackTraceGetterInterface interface.
 class OsStackTraceGetter : public OsStackTraceGetterInterface {
  public:
   OsStackTraceGetter() : caller_frame_(NULL) {}
-  virtual String CurrentStackTrace(int max_depth, int skip_count);
-  virtual void UponLeavingGTest();
+  String CurrentStackTrace(int max_depth, int skip_count) override;
+  void UponLeavingGTest() override;
 
   // This string is inserted in place of stack frames that are part of
   // Google Test's implementation.
   static const char* const kElidedFramesMarker;
 
  private:
   Mutex mutex_;  // protects all internal state
 

 // This is the default global test part result reporter used in UnitTestImpl.
 // This class should only be used by UnitTestImpl.
 class DefaultGlobalTestPartResultReporter
   : public TestPartResultReporterInterface {
  public:
   explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
   // Implements the TestPartResultReporterInterface. Reports the test part
   // result in the current test.
-  virtual void ReportTestPartResult(const TestPartResult& result);
+  void ReportTestPartResult(const TestPartResult &result) override;
 
  private:
   UnitTestImpl* const unit_test_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
 };
 
 // This is the default per thread test part result reporter used in
 // UnitTestImpl. This class should only be used by UnitTestImpl.
 class DefaultPerThreadTestPartResultReporter
     : public TestPartResultReporterInterface {
  public:
   explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
   // Implements the TestPartResultReporterInterface. The implementation just
   // delegates to the current global test part result reporter of *unit_test_.
-  virtual void ReportTestPartResult(const TestPartResult& result);
+  void ReportTestPartResult(const TestPartResult &result) override;
 
  private:
   UnitTestImpl* const unit_test_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
 };
 
 // The private implementation of the UnitTest class.  We don't protect

utils/unittest/googletest/src/gtest.cc

 class PrettyUnitTestResultPrinter : public TestEventListener {
  public:
   PrettyUnitTestResultPrinter() {}
   static void PrintTestName(const char * test_case, const char * test) {
     printf("%s.%s", test_case, test);
   }
 
   // The following methods override what's in the TestEventListener class.
-  virtual void OnTestProgramStart(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestCaseStart(const TestCase& test_case);
-  virtual void OnTestStart(const TestInfo& test_info);
-  virtual void OnTestPartResult(const TestPartResult& result);
-  virtual void OnTestEnd(const TestInfo& test_info);
-  virtual void OnTestCaseEnd(const TestCase& test_case);
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) {}
-  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
-  virtual void OnTestProgramEnd(const UnitTest& /*unit_test*/) {}
+  void OnTestProgramStart(const UnitTest & /*unit_test*/) override {}
+  void OnTestIterationStart(const UnitTest &unit_test, int iteration) override;
+  void OnEnvironmentsSetUpStart(const UnitTest &unit_test) override;
+  void OnEnvironmentsSetUpEnd(const UnitTest & /*unit_test*/) override {}
+  void OnTestCaseStart(const TestCase &test_case) override;
+  void OnTestStart(const TestInfo &test_info) override;
+  void OnTestPartResult(const TestPartResult &result) override;
+  void OnTestEnd(const TestInfo &test_info) override;
+  void OnTestCaseEnd(const TestCase &test_case) override;
+  void OnEnvironmentsTearDownStart(const UnitTest &unit_test) override;
+  void OnEnvironmentsTearDownEnd(const UnitTest & /*unit_test*/) override {}
+  void OnTestIterationEnd(const UnitTest &unit_test, int iteration) override;
+  void OnTestProgramEnd(const UnitTest & /*unit_test*/) override {}
 
  private:
   static void PrintFailedTests(const UnitTest& unit_test);
 
   internal::String test_case_name_;
 };
 
   // Fired before each iteration of tests starts.

 // End PrettyUnitTestResultPrinter
 
 // class TestEventRepeater
 //
 // This class forwards events to other event listeners.
 class TestEventRepeater : public TestEventListener {
  public:
   TestEventRepeater() : forwarding_enabled_(true) {}
-  virtual ~TestEventRepeater();
+  ~TestEventRepeater() override;
   void Append(TestEventListener *listener);
   TestEventListener* Release(TestEventListener* listener);
 
   // Controls whether events will be forwarded to listeners_. Set to false
   // in death test child processes.
   bool forwarding_enabled() const { return forwarding_enabled_; }
   void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
 
-  virtual void OnTestProgramStart(const UnitTest& unit_test);
-  virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test);
-  virtual void OnTestCaseStart(const TestCase& test_case);
-  virtual void OnTestStart(const TestInfo& test_info);
-  virtual void OnTestPartResult(const TestPartResult& result);
-  virtual void OnTestEnd(const TestInfo& test_info);
-  virtual void OnTestCaseEnd(const TestCase& test_case);
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test);
-  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
-  virtual void OnTestProgramEnd(const UnitTest& unit_test);
+  void OnTestProgramStart(const UnitTest &unit_test) override;
+  void OnTestIterationStart(const UnitTest &unit_test, int iteration) override;
+  void OnEnvironmentsSetUpStart(const UnitTest &unit_test) override;
+  void OnEnvironmentsSetUpEnd(const UnitTest &unit_test) override;
+  void OnTestCaseStart(const TestCase &test_case) override;
+  void OnTestStart(const TestInfo &test_info) override;
+  void OnTestPartResult(const TestPartResult &result) override;
+  void OnTestEnd(const TestInfo &test_info) override;
+  void OnTestCaseEnd(const TestCase &test_case) override;
+  void OnEnvironmentsTearDownStart(const UnitTest &unit_test) override;
+  void OnEnvironmentsTearDownEnd(const UnitTest &unit_test) override;
+  void OnTestIterationEnd(const UnitTest &unit_test, int iteration) override;
+  void OnTestProgramEnd(const UnitTest &unit_test) override;
 
  private:
   // Controls whether events will be forwarded to listeners_. Set to false
   // in death test child processes.
   bool forwarding_enabled_;
   // The list of listeners that receive events.
   std::vector<TestEventListener*> listeners_;
 

 
 // End TestEventRepeater
 
 // This class generates an XML output file.
 class XmlUnitTestResultPrinter : public EmptyTestEventListener {
  public:
   explicit XmlUnitTestResultPrinter(const char* output_file);
 
-  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
+  void OnTestIterationEnd(const UnitTest &unit_test, int iteration) override;
 
  private:
   // Is c a whitespace character that is normalized to a space character
   // when it appears in an XML attribute value?
   static bool IsNormalizableWhitespace(char c) {
     return c == 0x9 || c == 0xA || c == 0xD;
   }
 
public:
   static string UrlEncode(const char* str);
 
   StreamingListener(const string& host, const string& port)
       : sockfd_(-1), host_name_(host), port_num_(port) {
     MakeConnection();
     Send("gtest_streaming_protocol_version=1.0\n");
   }
 
-  virtual ~StreamingListener() {
+  ~StreamingListener() override {
     if (sockfd_ != -1)
       CloseConnection();
   }
 
-  void OnTestProgramStart(const UnitTest& /* unit_test */) {
+  void OnTestProgramStart(const UnitTest & /* unit_test */) override {
     Send("event=TestProgramStart\n");
   }
 
-  void OnTestProgramEnd(const UnitTest& unit_test) {
+  void OnTestProgramEnd(const UnitTest &unit_test) override {
     // Note that Google Test current only report elapsed time for each
     // test iteration, not for the entire test program.
     Send(String::Format("event=TestProgramEnd&passed=%d\n",
                         unit_test.Passed()));
 
     // Notify the streaming server to stop.
     CloseConnection();
   }
 
-  void OnTestIterationStart(const UnitTest& /* unit_test */, int iteration) {
+  void OnTestIterationStart(const UnitTest & /* unit_test */,
+                            int iteration) override {
     Send(String::Format("event=TestIterationStart&iteration=%d\n",
                         iteration));
   }
 
-  void OnTestIterationEnd(const UnitTest& unit_test, int /* iteration */) {
+  void OnTestIterationEnd(const UnitTest &unit_test,
+                          int /* iteration */) override {
     Send(String::Format("event=TestIterationEnd&passed=%d&elapsed_time=%sms\n",
                         unit_test.Passed(),
                         StreamableToString(unit_test.elapsed_time()).c_str()));
   }
 
-  void OnTestCaseStart(const TestCase& test_case) {
+  void OnTestCaseStart(const TestCase &test_case) override {
     Send(String::Format("event=TestCaseStart&name=%s\n", test_case.name()));
   }
 
-  void OnTestCaseEnd(const TestCase& test_case) {
+  void OnTestCaseEnd(const TestCase &test_case) override {
     Send(String::Format("event=TestCaseEnd&passed=%d&elapsed_time=%sms\n",
                         test_case.Passed(),
                         StreamableToString(test_case.elapsed_time()).c_str()));
   }
 
-  void OnTestStart(const TestInfo& test_info) {
+  void OnTestStart(const TestInfo &test_info) override {
     Send(String::Format("event=TestStart&name=%s\n", test_info.name()));
   }
 
-  void OnTestEnd(const TestInfo& test_info) {
+  void OnTestEnd(const TestInfo &test_info) override {
     Send(String::Format(
         "event=TestEnd&passed=%d&elapsed_time=%sms\n",
         (test_info.result())->Passed(),
         StreamableToString((test_info.result())->elapsed_time()).c_str()));
   }
 
-  void OnTestPartResult(const TestPartResult& test_part_result) {
+  void OnTestPartResult(const TestPartResult &test_part_result) override {
     const char* file_name = test_part_result.file_name();
     if (file_name == NULL)
       file_name = "";
     Send(String::Format("event=TestPartResult&file=%s&line=%d&message=",
                         UrlEncode(file_name).c_str(),
                         test_part_result.line_number()));
     Send(UrlEncode(test_part_result.message()) + "\n");
   }