diff --git a/lib/Target/Hexagon/HexagonAsmPrinter.h b/lib/Target/Hexagon/HexagonAsmPrinter.h
index a186dc9c733..7fe8c5790c6 100644
--- a/lib/Target/Hexagon/HexagonAsmPrinter.h
+++ b/lib/Target/Hexagon/HexagonAsmPrinter.h
@@ -30,21 +30,22 @@ namespace llvm {
       Subtarget = &TM.getSubtarget<HexagonSubtarget>();
     }
 
-    virtual const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon Assembly Printer";
     }
 
-    bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const;
+    bool isBlockOnlyReachableByFallthrough(
+                                   const MachineBasicBlock *MBB) const override;
 
-    virtual void EmitInstruction(const MachineInstr *MI);
+    void EmitInstruction(const MachineInstr *MI) override;
 
     void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
     bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                          unsigned AsmVariant, const char *ExtraCode,
-                         raw_ostream &OS);
+                         raw_ostream &OS) override;
     bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                                unsigned AsmVariant, const char *ExtraCode,
-                               raw_ostream &OS);
+                               raw_ostream &OS) override;
 
     static const char *getRegisterName(unsigned RegNo);
   };
diff --git a/lib/Target/Hexagon/HexagonCFGOptimizer.cpp b/lib/Target/Hexagon/HexagonCFGOptimizer.cpp
index a6f807fda89..de340e0074d 100644
--- a/lib/Target/Hexagon/HexagonCFGOptimizer.cpp
+++ b/lib/Target/Hexagon/HexagonCFGOptimizer.cpp
@@ -49,10 +49,10 @@ private:
     initializeHexagonCFGOptimizerPass(*PassRegistry::getPassRegistry());
   }
 
-  const char *getPassName() const {
+  const char *getPassName() const override {
     return "Hexagon CFG Optimizer";
   }
-  bool runOnMachineFunction(MachineFunction &Fn);
+  bool runOnMachineFunction(MachineFunction &Fn) override;
 };
 
 
diff --git a/lib/Target/Hexagon/HexagonCopyToCombine.cpp b/lib/Target/Hexagon/HexagonCopyToCombine.cpp
index 23de1bf77db..aeff680e6a9 100644
--- a/lib/Target/Hexagon/HexagonCopyToCombine.cpp
+++ b/lib/Target/Hexagon/HexagonCopyToCombine.cpp
@@ -68,15 +68,15 @@ public:
     initializeHexagonCopyToCombinePass(*PassRegistry::getPassRegistry());
   }
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     MachineFunctionPass::getAnalysisUsage(AU);
   }
 
-  const char *getPassName() const {
+  const char *getPassName() const override {
     return "Hexagon Copy-To-Combine Pass";
   }
 
-  virtual bool runOnMachineFunction(MachineFunction &Fn);
+  bool runOnMachineFunction(MachineFunction &Fn) override;
 
 private:
   MachineInstr *findPairable(MachineInstr *I1, bool &DoInsertAtI1);
diff --git a/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp b/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp
index e4590bbd4ed..3dafe80ffc4 100644
--- a/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp
+++ b/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp
@@ -60,10 +60,10 @@ class HexagonExpandPredSpillCode : public MachineFunctionPass {
       initializeHexagonExpandPredSpillCodePass(Registry);
     }
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon Expand Predicate Spill Code";
     }
-    bool runOnMachineFunction(MachineFunction &Fn);
+    bool runOnMachineFunction(MachineFunction &Fn) override;
 };
 
 
diff --git a/lib/Target/Hexagon/HexagonFixupHwLoops.cpp b/lib/Target/Hexagon/HexagonFixupHwLoops.cpp
index a79264bb58e..d41939a57a4 100644
--- a/lib/Target/Hexagon/HexagonFixupHwLoops.cpp
+++ b/lib/Target/Hexagon/HexagonFixupHwLoops.cpp
@@ -40,11 +40,13 @@ namespace {
       initializeHexagonFixupHwLoopsPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual bool runOnMachineFunction(MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &MF) override;
 
-    const char *getPassName() const { return "Hexagon Hardware Loop Fixup"; }
+    const char *getPassName() const override {
+      return "Hexagon Hardware Loop Fixup";
+    }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesCFG();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
diff --git a/lib/Target/Hexagon/HexagonFrameLowering.h b/lib/Target/Hexagon/HexagonFrameLowering.h
index a62c76aaf67..446af161aa7 100644
--- a/lib/Target/Hexagon/HexagonFrameLowering.h
+++ b/lib/Target/Hexagon/HexagonFrameLowering.h
@@ -28,25 +28,25 @@ public:
 
   /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
   /// the function.
-  void emitPrologue(MachineFunction &MF) const;
-  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
-  virtual bool
-  spillCalleeSavedRegisters(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MI,
-                            const std::vector<CalleeSavedInfo> &CSI,
-                            const TargetRegisterInfo *TRI) const;
+  void emitPrologue(MachineFunction &MF) const override;
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+                                 MachineBasicBlock::iterator MI,
+                                 const std::vector<CalleeSavedInfo> &CSI,
+                                 const TargetRegisterInfo *TRI) const override;
 
-  void eliminateCallFramePseudoInstr(MachineFunction &MF,
-                                     MachineBasicBlock &MBB,
-                                     MachineBasicBlock::iterator I) const;
+  void
+  eliminateCallFramePseudoInstr(MachineFunction &MF,
+                                MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator I) const override;
 
-  virtual bool
+  bool
   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator MI,
                               const std::vector<CalleeSavedInfo> &CSI,
-                              const TargetRegisterInfo *TRI) const;
-  int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
-  bool hasFP(const MachineFunction &MF) const;
+                              const TargetRegisterInfo *TRI) const override;
+  int getFrameIndexOffset(const MachineFunction &MF, int FI) const override;
+  bool hasFP(const MachineFunction &MF) const override;
   bool hasTailCall(MachineBasicBlock &MBB) const;
 };
 
diff --git a/lib/Target/Hexagon/HexagonHardwareLoops.cpp b/lib/Target/Hexagon/HexagonHardwareLoops.cpp
index db83b1ab397..7f76421ac3e 100644
--- a/lib/Target/Hexagon/HexagonHardwareLoops.cpp
+++ b/lib/Target/Hexagon/HexagonHardwareLoops.cpp
@@ -78,11 +78,11 @@ namespace {
       initializeHexagonHardwareLoopsPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual bool runOnMachineFunction(MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &MF) override;
 
-    const char *getPassName() const { return "Hexagon Hardware Loops"; }
+    const char *getPassName() const override { return "Hexagon Hardware Loops"; }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<MachineDominatorTree>();
       AU.addRequired<MachineLoopInfo>();
       MachineFunctionPass::getAnalysisUsage(AU);
diff --git a/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp b/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
index 687f097351d..dabe650a5b7 100644
--- a/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
+++ b/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
@@ -62,7 +62,7 @@ public:
   }
   bool hasNumUsesBelowThresGA(SDNode *N) const;
 
-  SDNode *Select(SDNode *N);
+  SDNode *Select(SDNode *N) override;
 
   // Complex Pattern Selectors.
   inline bool foldGlobalAddress(SDValue &N, SDValue &R);
@@ -79,15 +79,15 @@ public:
   bool SelectADDRriU6_1(SDValue& N, SDValue &R1, SDValue &R2);
   bool SelectADDRriU6_2(SDValue& N, SDValue &R1, SDValue &R2);
 
-  virtual const char *getPassName() const {
+  const char *getPassName() const override {
     return "Hexagon DAG->DAG Pattern Instruction Selection";
   }
 
   /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
   /// inline asm expressions.
-  virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
-                                            char ConstraintCode,
-                                            std::vector<SDValue> &OutOps);
+  bool SelectInlineAsmMemoryOperand(const SDValue &Op,
+                                    char ConstraintCode,
+                                    std::vector<SDValue> &OutOps) override;
   bool SelectAddr(SDNode *Op, SDValue Addr, SDValue &Base, SDValue &Offset);
 
   SDNode *SelectLoad(SDNode *N);
diff --git a/lib/Target/Hexagon/HexagonISelLowering.h b/lib/Target/Hexagon/HexagonISelLowering.h
index 73da226a172..4f27c276564 100644
--- a/lib/Target/Hexagon/HexagonISelLowering.h
+++ b/lib/Target/Hexagon/HexagonISelLowering.h
@@ -92,14 +92,14 @@ namespace llvm {
                                       const SmallVectorImpl<ISD::InputArg> &Ins,
                                       SelectionDAG& DAG) const;
 
-    virtual bool isTruncateFree(Type *Ty1, Type *Ty2) const;
-    virtual bool isTruncateFree(EVT VT1, EVT VT2) const;
+    bool isTruncateFree(Type *Ty1, Type *Ty2) const override;
+    bool isTruncateFree(EVT VT1, EVT VT2) const override;
 
-    virtual bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const;
+    bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const override;
 
-    virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
+    SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
 
-    virtual const char *getTargetNodeName(unsigned Opcode) const;
+    const char *getTargetNodeName(unsigned Opcode) const override;
     SDValue  LowerBR_JT(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const;
@@ -109,12 +109,12 @@ namespace llvm {
                                  CallingConv::ID CallConv, bool isVarArg,
                                  const SmallVectorImpl<ISD::InputArg> &Ins,
                                  SDLoc dl, SelectionDAG &DAG,
-                                 SmallVectorImpl<SDValue> &InVals) const;
+                                 SmallVectorImpl<SDValue> &InVals) const override;
     SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
 
     SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI,
-                      SmallVectorImpl<SDValue> &InVals) const;
+                      SmallVectorImpl<SDValue> &InVals) const override;
 
     SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
                             CallingConv::ID CallConv, bool isVarArg,
@@ -133,46 +133,45 @@ namespace llvm {
                         CallingConv::ID CallConv, bool isVarArg,
                         const SmallVectorImpl<ISD::OutputArg> &Outs,
                         const SmallVectorImpl<SDValue> &OutVals,
-                        SDLoc dl, SelectionDAG &DAG) const;
+                        SDLoc dl, SelectionDAG &DAG) const override;
 
-    virtual MachineBasicBlock
-    *EmitInstrWithCustomInserter(MachineInstr *MI,
-                                 MachineBasicBlock *BB) const;
+    MachineBasicBlock *
+    EmitInstrWithCustomInserter(MachineInstr *MI,
+                                MachineBasicBlock *BB) const override;
 
     SDValue  LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
     SDValue  LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
-    virtual EVT getSetCCResultType(LLVMContext &C, EVT VT) const {
+    EVT getSetCCResultType(LLVMContext &C, EVT VT) const override {
       if (!VT.isVector())
         return MVT::i1;
       else
         return EVT::getVectorVT(C, MVT::i1, VT.getVectorNumElements());
     }
 
-    virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op,
-                                            SDValue &Base, SDValue &Offset,
-                                            ISD::MemIndexedMode &AM,
-                                            SelectionDAG &DAG) const;
+    bool getPostIndexedAddressParts(SDNode *N, SDNode *Op,
+                                    SDValue &Base, SDValue &Offset,
+                                    ISD::MemIndexedMode &AM,
+                                    SelectionDAG &DAG) const override;
 
     std::pair<unsigned, const TargetRegisterClass*>
     getRegForInlineAsmConstraint(const std::string &Constraint,
-                                 MVT VT) const;
+                                 MVT VT) const override;
 
     // Intrinsics
-    virtual SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op,
-                                            SelectionDAG &DAG) const;
+    SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
     /// isLegalAddressingMode - Return true if the addressing mode represented
     /// by AM is legal for this target, for a load/store of the specified type.
     /// The type may be VoidTy, in which case only return true if the addressing
     /// mode is legal for a load/store of any legal type.
     /// TODO: Handle pre/postinc as well.
-    virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const;
-    virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
+    bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const override;
+    bool isFPImmLegal(const APFloat &Imm, EVT VT) const override;
 
     /// isLegalICmpImmediate - Return true if the specified immediate is legal
     /// icmp immediate, that is the target has icmp instructions which can
     /// compare a register against the immediate without having to materialize
     /// the immediate into a register.
-    virtual bool isLegalICmpImmediate(int64_t Imm) const;
+    bool isLegalICmpImmediate(int64_t Imm) const override;
   };
 } // end namespace llvm
 
diff --git a/lib/Target/Hexagon/HexagonInstrInfo.h b/lib/Target/Hexagon/HexagonInstrInfo.h
index 2a715b2d370..6b032c95e74 100644
--- a/lib/Target/Hexagon/HexagonInstrInfo.h
+++ b/lib/Target/Hexagon/HexagonInstrInfo.h
@@ -40,124 +40,121 @@ public:
   /// such, whenever a client has an instance of instruction info, it should
   /// always be able to get register info as well (through this method).
   ///
-  virtual const HexagonRegisterInfo &getRegisterInfo() const { return RI; }
+  const HexagonRegisterInfo &getRegisterInfo() const { return RI; }
 
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If
   /// not, return 0.  This predicate must return 0 if the instruction has
   /// any side effects other than loading from the stack slot.
-  virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
-                                       int &FrameIndex) const;
+  unsigned isLoadFromStackSlot(const MachineInstr *MI,
+                               int &FrameIndex) const override;
 
   /// isStoreToStackSlot - If the specified machine instruction is a direct
   /// store to a stack slot, return the virtual or physical register number of
   /// the source reg along with the FrameIndex of the loaded stack slot.  If
   /// not, return 0.  This predicate must return 0 if the instruction has
   /// any side effects other than storing to the stack slot.
-  virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
-                                      int &FrameIndex) const;
+  unsigned isStoreToStackSlot(const MachineInstr *MI,
+                              int &FrameIndex) const override;
 
 
-  virtual bool AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
-                                 MachineBasicBlock *&FBB,
-                                 SmallVectorImpl<MachineOperand> &Cond,
-                                 bool AllowModify) const;
+  bool AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
+                         MachineBasicBlock *&FBB,
+                         SmallVectorImpl<MachineOperand> &Cond,
+                         bool AllowModify) const override;
 
-  virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
+  unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
 
-  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
-                                MachineBasicBlock *FBB,
-                                const SmallVectorImpl<MachineOperand> &Cond,
-                                DebugLoc DL) const;
+  unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+                        MachineBasicBlock *FBB,
+                        const SmallVectorImpl<MachineOperand> &Cond,
+                        DebugLoc DL) const override;
 
-  virtual bool analyzeCompare(const MachineInstr *MI,
-                              unsigned &SrcReg, unsigned &SrcReg2,
-                              int &Mask, int &Value) const;
+  bool analyzeCompare(const MachineInstr *MI,
+                      unsigned &SrcReg, unsigned &SrcReg2,
+                      int &Mask, int &Value) const override;
 
-  virtual void copyPhysReg(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator I, DebugLoc DL,
-                           unsigned DestReg, unsigned SrcReg,
-                           bool KillSrc) const;
+  void copyPhysReg(MachineBasicBlock &MBB,
+                   MachineBasicBlock::iterator I, DebugLoc DL,
+                   unsigned DestReg, unsigned SrcReg,
+                   bool KillSrc) const override;
 
-  virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
-                                   MachineBasicBlock::iterator MBBI,
-                                   unsigned SrcReg, bool isKill, int FrameIndex,
-                                   const TargetRegisterClass *RC,
-                                   const TargetRegisterInfo *TRI) const;
+  void storeRegToStackSlot(MachineBasicBlock &MBB,
+                           MachineBasicBlock::iterator MBBI,
+                           unsigned SrcReg, bool isKill, int FrameIndex,
+                           const TargetRegisterClass *RC,
+                           const TargetRegisterInfo *TRI) const override;
 
-  virtual void storeRegToAddr(MachineFunction &MF, unsigned SrcReg, bool isKill,
-                              SmallVectorImpl<MachineOperand> &Addr,
-                              const TargetRegisterClass *RC,
-                              SmallVectorImpl<MachineInstr*> &NewMIs) const;
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg, bool isKill,
+                      SmallVectorImpl<MachineOperand> &Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVectorImpl<MachineInstr*> &NewMIs) const;
 
-  virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                                    MachineBasicBlock::iterator MBBI,
-                                    unsigned DestReg, int FrameIndex,
-                                    const TargetRegisterClass *RC,
-                                    const TargetRegisterInfo *TRI) const;
+  void loadRegFromStackSlot(MachineBasicBlock &MBB,
+                            MachineBasicBlock::iterator MBBI,
+                            unsigned DestReg, int FrameIndex,
+                            const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI) const override;
 
-  virtual void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
-                               SmallVectorImpl<MachineOperand> &Addr,
-                               const TargetRegisterClass *RC,
-                               SmallVectorImpl<MachineInstr*> &NewMIs) const;
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVectorImpl<MachineOperand> &Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVectorImpl<MachineInstr*> &NewMIs) const;
 
-  virtual MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
-                                              MachineInstr* MI,
-                                           const SmallVectorImpl<unsigned> &Ops,
-                                              int FrameIndex) const;
+  MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
+                                      MachineInstr* MI,
+                                      const SmallVectorImpl<unsigned> &Ops,
+                                      int FrameIndex) const override;
 
-  virtual MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
-                                              MachineInstr* MI,
-                                           const SmallVectorImpl<unsigned> &Ops,
-                                              MachineInstr* LoadMI) const {
+  MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
+                                      MachineInstr* MI,
+                                      const SmallVectorImpl<unsigned> &Ops,
+                                      MachineInstr* LoadMI) const override {
     return nullptr;
   }
 
   unsigned createVR(MachineFunction* MF, MVT VT) const;
 
-  virtual bool isBranch(const MachineInstr *MI) const;
-  virtual bool isPredicable(MachineInstr *MI) const;
-  virtual bool
-  PredicateInstruction(MachineInstr *MI,
-                       const SmallVectorImpl<MachineOperand> &Cond) const;
+  bool isBranch(const MachineInstr *MI) const;
+  bool isPredicable(MachineInstr *MI) const override;
+  bool PredicateInstruction(MachineInstr *MI,
+                    const SmallVectorImpl<MachineOperand> &Cond) const override;
 
-  virtual bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
-                                   unsigned ExtraPredCycles,
-                                   const BranchProbability &Probability) const;
+  bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
+                           unsigned ExtraPredCycles,
+                           const BranchProbability &Probability) const override;
 
-  virtual bool isProfitableToIfCvt(MachineBasicBlock &TMBB,
-                                   unsigned NumTCycles, unsigned ExtraTCycles,
-                                   MachineBasicBlock &FMBB,
-                                   unsigned NumFCycles, unsigned ExtraFCycles,
-                                   const BranchProbability &Probability) const;
+  bool isProfitableToIfCvt(MachineBasicBlock &TMBB,
+                           unsigned NumTCycles, unsigned ExtraTCycles,
+                           MachineBasicBlock &FMBB,
+                           unsigned NumFCycles, unsigned ExtraFCycles,
+                           const BranchProbability &Probability) const override;
 
-  virtual bool isPredicated(const MachineInstr *MI) const;
-  virtual bool isPredicated(unsigned Opcode) const;
-  virtual bool isPredicatedTrue(const MachineInstr *MI) const;
-  virtual bool isPredicatedTrue(unsigned Opcode) const;
-  virtual bool isPredicatedNew(const MachineInstr *MI) const;
-  virtual bool isPredicatedNew(unsigned Opcode) const;
-  virtual bool DefinesPredicate(MachineInstr *MI,
-                                std::vector<MachineOperand> &Pred) const;
-  virtual bool
-  SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
-                    const SmallVectorImpl<MachineOperand> &Pred2) const;
+  bool isPredicated(const MachineInstr *MI) const override;
+  bool isPredicated(unsigned Opcode) const;
+  bool isPredicatedTrue(const MachineInstr *MI) const;
+  bool isPredicatedTrue(unsigned Opcode) const;
+  bool isPredicatedNew(const MachineInstr *MI) const;
+  bool isPredicatedNew(unsigned Opcode) const;
+  bool DefinesPredicate(MachineInstr *MI,
+                        std::vector<MachineOperand> &Pred) const override;
+  bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
+                   const SmallVectorImpl<MachineOperand> &Pred2) const override;
 
-  virtual bool
-  ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
+  bool
+  ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
 
-  virtual bool
-  isProfitableToDupForIfCvt(MachineBasicBlock &MBB,unsigned NumCycles,
-                            const BranchProbability &Probability) const;
+  bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
+                           const BranchProbability &Probability) const override;
 
-  virtual DFAPacketizer*
+  DFAPacketizer*
   CreateTargetScheduleState(const TargetMachine *TM,
-                            const ScheduleDAG *DAG) const;
+                            const ScheduleDAG *DAG) const override;
 
-  virtual bool isSchedulingBoundary(const MachineInstr *MI,
-                                    const MachineBasicBlock *MBB,
-                                    const MachineFunction &MF) const;
+  bool isSchedulingBoundary(const MachineInstr *MI,
+                            const MachineBasicBlock *MBB,
+                            const MachineFunction &MF) const override;
   bool isValidOffset(const int Opcode, const int Offset) const;
   bool isValidAutoIncImm(const EVT VT, const int Offset) const;
   bool isMemOp(const MachineInstr *MI) const;
diff --git a/lib/Target/Hexagon/HexagonNewValueJump.cpp b/lib/Target/Hexagon/HexagonNewValueJump.cpp
index 65bbad5225e..b7c03a72779 100644
--- a/lib/Target/Hexagon/HexagonNewValueJump.cpp
+++ b/lib/Target/Hexagon/HexagonNewValueJump.cpp
@@ -75,16 +75,16 @@ namespace {
       initializeHexagonNewValueJumpPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<MachineBranchProbabilityInfo>();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon NewValueJump";
     }
 
-    virtual bool runOnMachineFunction(MachineFunction &Fn);
+    bool runOnMachineFunction(MachineFunction &Fn) override;
 
   private:
     /// \brief A handle to the branch probability pass.
diff --git a/lib/Target/Hexagon/HexagonPeephole.cpp b/lib/Target/Hexagon/HexagonPeephole.cpp
index f55b78720bb..48b61590853 100644
--- a/lib/Target/Hexagon/HexagonPeephole.cpp
+++ b/lib/Target/Hexagon/HexagonPeephole.cpp
@@ -90,13 +90,13 @@ namespace {
       initializeHexagonPeepholePass(*PassRegistry::getPassRegistry());
     }
 
-    bool runOnMachineFunction(MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &MF) override;
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon optimize redundant zero and size extends";
     }
 
-    void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
diff --git a/lib/Target/Hexagon/HexagonRegisterInfo.h b/lib/Target/Hexagon/HexagonRegisterInfo.h
index c0160d898e0..648b4af9e95 100644
--- a/lib/Target/Hexagon/HexagonRegisterInfo.h
+++ b/lib/Target/Hexagon/HexagonRegisterInfo.h
@@ -49,16 +49,16 @@ struct HexagonRegisterInfo : public HexagonGenRegisterInfo {
 
   /// Code Generation virtual methods...
   const MCPhysReg *
-  getCalleeSavedRegs(const MachineFunction *MF = nullptr) const;
+  getCalleeSavedRegs(const MachineFunction *MF = nullptr) const override;
 
   const TargetRegisterClass* const*
   getCalleeSavedRegClasses(const MachineFunction *MF = nullptr) const;
 
-  BitVector getReservedRegs(const MachineFunction &MF) const;
+  BitVector getReservedRegs(const MachineFunction &MF) const override;
 
   void eliminateFrameIndex(MachineBasicBlock::iterator II,
                            int SPAdj, unsigned FIOperandNum,
-                           RegScavenger *RS = nullptr) const;
+                           RegScavenger *RS = nullptr) const override;
 
   /// determineFrameLayout - Determine the size of the frame and maximum call
   /// frame size.
@@ -66,17 +66,17 @@ struct HexagonRegisterInfo : public HexagonGenRegisterInfo {
 
   /// requiresRegisterScavenging - returns true since we may need scavenging for
   /// a temporary register when generating hardware loop instructions.
-  bool requiresRegisterScavenging(const MachineFunction &MF) const {
+  bool requiresRegisterScavenging(const MachineFunction &MF) const override {
     return true;
   }
 
-  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
+  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
     return true;
   }
 
   // Debug information queries.
   unsigned getRARegister() const;
-  unsigned getFrameRegister(const MachineFunction &MF) const;
+  unsigned getFrameRegister(const MachineFunction &MF) const override;
   unsigned getFrameRegister() const;
   unsigned getStackRegister() const;
 };
diff --git a/lib/Target/Hexagon/HexagonRemoveSZExtArgs.cpp b/lib/Target/Hexagon/HexagonRemoveSZExtArgs.cpp
index cadcb32c6ef..2b459a4336b 100644
--- a/lib/Target/Hexagon/HexagonRemoveSZExtArgs.cpp
+++ b/lib/Target/Hexagon/HexagonRemoveSZExtArgs.cpp
@@ -33,13 +33,13 @@ namespace {
     HexagonRemoveExtendArgs() : FunctionPass(ID) {
       initializeHexagonRemoveExtendArgsPass(*PassRegistry::getPassRegistry());
     }
-    virtual bool runOnFunction(Function &F);
+    bool runOnFunction(Function &F) override;
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Remove sign extends";
     }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<MachineFunctionAnalysis>();
       AU.addPreserved<MachineFunctionAnalysis>();
       AU.addPreserved("stack-protector");
diff --git a/lib/Target/Hexagon/HexagonSelectionDAGInfo.h b/lib/Target/Hexagon/HexagonSelectionDAGInfo.h
index 31f278a1857..8ba6108bdfa 100644
--- a/lib/Target/Hexagon/HexagonSelectionDAGInfo.h
+++ b/lib/Target/Hexagon/HexagonSelectionDAGInfo.h
@@ -25,14 +25,13 @@ public:
   explicit HexagonSelectionDAGInfo(const HexagonTargetMachine &TM);
   ~HexagonSelectionDAGInfo();
 
-  virtual
   SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl,
                                   SDValue Chain,
                                   SDValue Dst, SDValue Src,
                                   SDValue Size, unsigned Align,
                                   bool isVolatile, bool AlwaysInline,
                                   MachinePointerInfo DstPtrInfo,
-                                  MachinePointerInfo SrcPtrInfo) const;
+                                  MachinePointerInfo SrcPtrInfo) const override;
 };
 
 }
diff --git a/lib/Target/Hexagon/HexagonSplitConst32AndConst64.cpp b/lib/Target/Hexagon/HexagonSplitConst32AndConst64.cpp
index e337952225b..aa4121f4ed5 100644
--- a/lib/Target/Hexagon/HexagonSplitConst32AndConst64.cpp
+++ b/lib/Target/Hexagon/HexagonSplitConst32AndConst64.cpp
@@ -55,10 +55,10 @@ class HexagonSplitConst32AndConst64 : public MachineFunctionPass {
     HexagonSplitConst32AndConst64(const HexagonTargetMachine& TM)
       : MachineFunctionPass(ID), QTM(TM), QST(*TM.getSubtargetImpl()) {}
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon Split Const32s and Const64s";
     }
-    bool runOnMachineFunction(MachineFunction &Fn);
+    bool runOnMachineFunction(MachineFunction &Fn) override;
 };
 
 
diff --git a/lib/Target/Hexagon/HexagonSplitTFRCondSets.cpp b/lib/Target/Hexagon/HexagonSplitTFRCondSets.cpp
index 2f1ee41bb83..9601090af46 100644
--- a/lib/Target/Hexagon/HexagonSplitTFRCondSets.cpp
+++ b/lib/Target/Hexagon/HexagonSplitTFRCondSets.cpp
@@ -68,10 +68,10 @@ class HexagonSplitTFRCondSets : public MachineFunctionPass {
       initializeHexagonSplitTFRCondSetsPass(*PassRegistry::getPassRegistry());
     }
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon Split TFRCondSets";
     }
-    bool runOnMachineFunction(MachineFunction &Fn);
+    bool runOnMachineFunction(MachineFunction &Fn) override;
 };
 
 
diff --git a/lib/Target/Hexagon/HexagonTargetMachine.cpp b/lib/Target/Hexagon/HexagonTargetMachine.cpp
index d8011a266c6..0c5a643c7ee 100644
--- a/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -113,16 +113,16 @@ public:
     return getTM<HexagonTargetMachine>();
   }
 
-  virtual ScheduleDAGInstrs *
-  createMachineScheduler(MachineSchedContext *C) const {
+  ScheduleDAGInstrs *
+  createMachineScheduler(MachineSchedContext *C) const override {
     return createVLIWMachineSched(C);
   }
 
-  virtual bool addInstSelector();
-  virtual bool addPreRegAlloc();
-  virtual bool addPostRegAlloc();
-  virtual bool addPreSched2();
-  virtual bool addPreEmitPass();
+  bool addInstSelector() override;
+  bool addPreRegAlloc() override;
+  bool addPostRegAlloc() override;
+  bool addPreSched2() override;
+  bool addPreEmitPass() override;
 };
 } // namespace
 
diff --git a/lib/Target/Hexagon/HexagonTargetMachine.h b/lib/Target/Hexagon/HexagonTargetMachine.h
index cf8f9aa3612..fcf5f7f15ca 100644
--- a/lib/Target/Hexagon/HexagonTargetMachine.h
+++ b/lib/Target/Hexagon/HexagonTargetMachine.h
@@ -41,39 +41,39 @@ public:
                        Reloc::Model RM, CodeModel::Model CM,
                        CodeGenOpt::Level OL);
 
-  virtual const HexagonInstrInfo *getInstrInfo() const {
+  const HexagonInstrInfo *getInstrInfo() const override {
     return &InstrInfo;
   }
-  virtual const HexagonSubtarget *getSubtargetImpl() const {
+  const HexagonSubtarget *getSubtargetImpl() const override {
     return &Subtarget;
   }
-  virtual const HexagonRegisterInfo *getRegisterInfo() const {
+  const HexagonRegisterInfo *getRegisterInfo() const override {
     return &InstrInfo.getRegisterInfo();
   }
 
-  virtual const InstrItineraryData* getInstrItineraryData() const {
+  const InstrItineraryData* getInstrItineraryData() const override {
     return InstrItins;
   }
 
 
-  virtual const HexagonTargetLowering* getTargetLowering() const {
+  const HexagonTargetLowering* getTargetLowering() const override {
     return &TLInfo;
   }
 
-  virtual const HexagonFrameLowering* getFrameLowering() const {
+  const HexagonFrameLowering* getFrameLowering() const override {
     return &FrameLowering;
   }
 
-  virtual const HexagonSelectionDAGInfo* getSelectionDAGInfo() const {
+  const HexagonSelectionDAGInfo* getSelectionDAGInfo() const override {
     return &TSInfo;
   }
 
-  virtual const DataLayout       *getDataLayout() const { return &DL; }
+  const DataLayout       *getDataLayout() const override { return &DL; }
   static unsigned getModuleMatchQuality(const Module &M);
 
   // Pass Pipeline Configuration.
-  virtual bool addPassesForOptimizations(PassManagerBase &PM);
-  virtual TargetPassConfig *createPassConfig(PassManagerBase &PM);
+  virtual bool addPassesForOptimizations(PassManagerBase &PM) final;
+  TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 };
 
 extern bool flag_aligned_memcpy;
diff --git a/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp b/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
index 867b705a058..87ce960a60c 100644
--- a/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
+++ b/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
@@ -70,7 +70,7 @@ namespace {
       initializeHexagonPacketizerPass(*PassRegistry::getPassRegistry());
     }
 
-    void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesCFG();
       AU.addRequired<MachineDominatorTree>();
       AU.addRequired<MachineBranchProbabilityInfo>();
@@ -80,11 +80,11 @@ namespace {
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
-    const char *getPassName() const {
+    const char *getPassName() const override {
       return "Hexagon Packetizer";
     }
 
-    bool runOnMachineFunction(MachineFunction &Fn);
+    bool runOnMachineFunction(MachineFunction &Fn) override;
   };
   char HexagonPacketizer::ID = 0;
 
@@ -122,24 +122,25 @@ namespace {
                           const MachineBranchProbabilityInfo *MBPI);
 
     // initPacketizerState - initialize some internal flags.
-    void initPacketizerState();
+    void initPacketizerState() override;
 
     // ignorePseudoInstruction - Ignore bundling of pseudo instructions.
-    bool ignorePseudoInstruction(MachineInstr *MI, MachineBasicBlock *MBB);
+    bool ignorePseudoInstruction(MachineInstr *MI,
+                                 MachineBasicBlock *MBB) override;
 
     // isSoloInstruction - return true if instruction MI can not be packetized
     // with any other instruction, which means that MI itself is a packet.
-    bool isSoloInstruction(MachineInstr *MI);
+    bool isSoloInstruction(MachineInstr *MI) override;
 
     // isLegalToPacketizeTogether - Is it legal to packetize SUI and SUJ
     // together.
-    bool isLegalToPacketizeTogether(SUnit *SUI, SUnit *SUJ);
+    bool isLegalToPacketizeTogether(SUnit *SUI, SUnit *SUJ) override;
 
     // isLegalToPruneDependencies - Is it legal to prune dependece between SUI
     // and SUJ.
-    bool isLegalToPruneDependencies(SUnit *SUI, SUnit *SUJ);
+    bool isLegalToPruneDependencies(SUnit *SUI, SUnit *SUJ) override;
 
-    MachineBasicBlock::iterator addToPacket(MachineInstr *MI);
+    MachineBasicBlock::iterator addToPacket(MachineInstr *MI) override;
   private:
     bool IsCallDependent(MachineInstr* MI, SDep::Kind DepType, unsigned DepReg);
     bool PromoteToDotNew(MachineInstr* MI, SDep::Kind DepType,
diff --git a/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.h b/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.h
index d0cef683da9..09e3f88434e 100644
--- a/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.h
+++ b/lib/Target/Hexagon/InstPrinter/HexagonInstPrinter.h
@@ -27,7 +27,7 @@ namespace llvm {
                                 const MCRegisterInfo &MRI)
       : MCInstPrinter(MAI, MII, MRI), MII(MII) {}
 
-    virtual void printInst(const MCInst *MI, raw_ostream &O, StringRef Annot);
+    void printInst(const MCInst *MI, raw_ostream &O, StringRef Annot) override;
     void printInst(const HexagonMCInst *MI, raw_ostream &O, StringRef Annot);
     virtual StringRef getOpcodeName(unsigned Opcode) const;
     void printInstruction(const MCInst *MI, raw_ostream &O);
diff --git a/lib/Target/Hexagon/MCTargetDesc/HexagonMCAsmInfo.h b/lib/Target/Hexagon/MCTargetDesc/HexagonMCAsmInfo.h
index bd8cb7637af..953d804b49a 100644
--- a/lib/Target/Hexagon/MCTargetDesc/HexagonMCAsmInfo.h
+++ b/lib/Target/Hexagon/MCTargetDesc/HexagonMCAsmInfo.h
@@ -19,7 +19,7 @@
 
 namespace llvm {
   class HexagonMCAsmInfo : public MCAsmInfoELF {
-    virtual void anchor();
+    void anchor() override;
   public:
     explicit HexagonMCAsmInfo(StringRef TT);
   };