[MC] Add "override" where appropriate (NFC)

llvm/include/llvm/MC/MCDXContainerWriter.h

@@ -23,7 +23,7 @@ class MCDXContainerTargetWriter : public MCObjectTargetWriter {
   MCDXContainerTargetWriter() {}
 
 public:
-  virtual ~MCDXContainerTargetWriter();
+  ~MCDXContainerTargetWriter() override;
 
   Triple::ObjectFormatType getFormat() const override {
     return Triple::DXContainer;

llvm/include/llvm/MC/MCELFObjectWriter.h

@@ -62,7 +62,7 @@ class MCELFObjectTargetWriter : public MCObjectTargetWriter {
                           bool HasRelocationAddend_, uint8_t ABIVersion_ = 0);
 
 public:
-  virtual ~MCELFObjectTargetWriter() = default;
+  ~MCELFObjectTargetWriter() override = default;
 
   Triple::ObjectFormatType getFormat() const override { return Triple::ELF; }
   static bool classof(const MCObjectTargetWriter *W) {

llvm/include/llvm/MC/MCGOFFObjectWriter.h

@@ -21,7 +21,7 @@ class MCGOFFObjectTargetWriter : public MCObjectTargetWriter {
   MCGOFFObjectTargetWriter() = default;
 
 public:
-  virtual ~MCGOFFObjectTargetWriter() = default;
+  ~MCGOFFObjectTargetWriter() override = default;
 
   Triple::ObjectFormatType getFormat() const override { return Triple::GOFF; }
 

llvm/include/llvm/MC/MCMachObjectWriter.h

@@ -48,7 +48,7 @@ class LLVM_ABI MCMachObjectTargetWriter : public MCObjectTargetWriter {
   }
 
 public:
-  virtual ~MCMachObjectTargetWriter();
+  ~MCMachObjectTargetWriter() override;
 
   Triple::ObjectFormatType getFormat() const override { return Triple::MachO; }
   static bool classof(const MCObjectTargetWriter *W) {

llvm/include/llvm/MC/MCObjectStreamer.h

@@ -68,7 +68,7 @@ class MCObjectStreamer : public MCStreamer {
   MCObjectStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
                    std::unique_ptr<MCObjectWriter> OW,
                    std::unique_ptr<MCCodeEmitter> Emitter);
-  ~MCObjectStreamer();
+  ~MCObjectStreamer() override;
 
 public:
   /// state management

llvm/include/llvm/MC/MCWasmObjectWriter.h

@@ -27,7 +27,7 @@ class MCWasmObjectTargetWriter : public MCObjectTargetWriter {
   explicit MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten);
 
 public:
-  virtual ~MCWasmObjectTargetWriter();
+  ~MCWasmObjectTargetWriter() override;
 
   Triple::ObjectFormatType getFormat() const override { return Triple::Wasm; }
   static bool classof(const MCObjectTargetWriter *W) {

llvm/include/llvm/MC/MCWinCOFFObjectWriter.h

@@ -29,7 +29,7 @@ class MCWinCOFFObjectTargetWriter : public MCObjectTargetWriter {
   MCWinCOFFObjectTargetWriter(unsigned Machine_);
 
 public:
-  virtual ~MCWinCOFFObjectTargetWriter() = default;
+  ~MCWinCOFFObjectTargetWriter() override = default;
 
   Triple::ObjectFormatType getFormat() const override { return Triple::COFF; }
   static bool classof(const MCObjectTargetWriter *W) {

llvm/lib/MC/GOFFObjectWriter.cpp

@@ -440,7 +440,7 @@ class TextStream : public raw_ostream {
     SetBuffer(Buffer, sizeof(Buffer));
   }
 
-  ~TextStream() { flush(); }
+  ~TextStream() override { flush(); }
 };
 } // namespace
 

llvm/lib/MC/MCAsmStreamer.cpp

@@ -295,7 +295,7 @@ class MCAsmStreamer final : public MCStreamer {
                              unsigned Flags, unsigned Isa,
                              unsigned Discriminator, StringRef FileName,
                              StringRef Location = {}) override;
-  virtual void emitDwarfLocLabelDirective(SMLoc Loc, StringRef Name) override;
+  void emitDwarfLocLabelDirective(SMLoc Loc, StringRef Name) override;
 
   MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override;
 

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -726,7 +726,7 @@ class HLASMAsmParser final : public AsmParser {
     Lexer.setLexHLASMStrings(true);
   }
 
-  ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
+  ~HLASMAsmParser() override { Lexer.setSkipSpace(true); }
 
   bool parseStatement(ParseStatementInfo &Info,
                       MCAsmParserSemaCallback *SI) override;

llvm/lib/MC/XCOFFObjectWriter.cpp

@@ -184,7 +184,7 @@ struct CsectSectionEntry : public SectionEntry {
       Group->clear();
   }
 
-  virtual ~CsectSectionEntry() = default;
+  ~CsectSectionEntry() override = default;
 };
 
 struct DwarfSectionEntry : public SectionEntry {
@@ -220,7 +220,7 @@ struct DwarfSectionEntry : public SectionEntry {
 
   DwarfSectionEntry(DwarfSectionEntry &&s) = default;
 
-  virtual ~DwarfSectionEntry() = default;
+  ~DwarfSectionEntry() override = default;
 };
 
 struct ExceptionTableEntry {
@@ -249,7 +249,7 @@ struct ExceptionSectionEntry : public SectionEntry {
     memcpy(Name, N.data(), N.size());
   }
 
-  virtual ~ExceptionSectionEntry() = default;
+  ~ExceptionSectionEntry() override = default;
 };
 
 struct CInfoSymInfo {
@@ -276,7 +276,7 @@ struct CInfoSymSectionEntry : public SectionEntry {
   std::unique_ptr<CInfoSymInfo> Entry;
 
   CInfoSymSectionEntry(StringRef N, int32_t Flags) : SectionEntry(N, Flags) {}
-  virtual ~CInfoSymSectionEntry() = default;
+  ~CInfoSymSectionEntry() override = default;
   void addEntry(std::unique_ptr<CInfoSymInfo> NewEntry) {
     Entry = std::move(NewEntry);
     Entry->Offset = sizeof(uint32_t);

llvm/unittests/MC/SystemZ/SystemZMCDisassemblerTest.cpp

@@ -61,7 +61,7 @@ Context &getContext() {
 class SystemZMCSymbolizerTest : public MCSymbolizer {
 public:
   SystemZMCSymbolizerTest(MCContext &MC) : MCSymbolizer(MC, nullptr) {}
-  ~SystemZMCSymbolizerTest() {}
+  ~SystemZMCSymbolizerTest() override {}
 
   bool tryAddingSymbolicOperand([[maybe_unused]] MCInst &Inst,
                                 [[maybe_unused]] raw_ostream &CStream,

llvm/unittests/MC/X86/X86MCDisassemblerTest.cpp

@@ -62,7 +62,7 @@ Context &getContext() {
 class X86MCSymbolizerTest : public MCSymbolizer {
 public:
   X86MCSymbolizerTest(MCContext &MC) : MCSymbolizer(MC, nullptr) {}
-  ~X86MCSymbolizerTest() {}
+  ~X86MCSymbolizerTest() override {}
 
   struct OpInfo {
     int64_t Value = 0;