diff --git a/llvm/include/llvm/MC/MCDXContainerWriter.h b/llvm/include/llvm/MC/MCDXContainerWriter.h
index 44d2af3e8a766..9b6ba896a5f09 100644
--- a/llvm/include/llvm/MC/MCDXContainerWriter.h
+++ b/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;
diff --git a/llvm/include/llvm/MC/MCELFObjectWriter.h b/llvm/include/llvm/MC/MCELFObjectWriter.h
index a8b00aa2b45ac..35614cb9c9117 100644
--- a/llvm/include/llvm/MC/MCELFObjectWriter.h
+++ b/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) {
diff --git a/llvm/include/llvm/MC/MCGOFFObjectWriter.h b/llvm/include/llvm/MC/MCGOFFObjectWriter.h
index 78a491522dbd6..ec07637dd2847 100644
--- a/llvm/include/llvm/MC/MCGOFFObjectWriter.h
+++ b/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; }
 
diff --git a/llvm/include/llvm/MC/MCMachObjectWriter.h b/llvm/include/llvm/MC/MCMachObjectWriter.h
index 41416a2f9c698..2163312b9e3c8 100644
--- a/llvm/include/llvm/MC/MCMachObjectWriter.h
+++ b/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) {
diff --git a/llvm/include/llvm/MC/MCObjectStreamer.h b/llvm/include/llvm/MC/MCObjectStreamer.h
index 1899cb6331c6f..d9aecd881b51c 100644
--- a/llvm/include/llvm/MC/MCObjectStreamer.h
+++ b/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
diff --git a/llvm/include/llvm/MC/MCWasmObjectWriter.h b/llvm/include/llvm/MC/MCWasmObjectWriter.h
index 3d5b09407507a..9dd588d0a15b9 100644
--- a/llvm/include/llvm/MC/MCWasmObjectWriter.h
+++ b/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) {
diff --git a/llvm/include/llvm/MC/MCWinCOFFObjectWriter.h b/llvm/include/llvm/MC/MCWinCOFFObjectWriter.h
index b11eacc0dc61d..4a9cf9c56ff01 100644
--- a/llvm/include/llvm/MC/MCWinCOFFObjectWriter.h
+++ b/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) {
diff --git a/llvm/lib/MC/GOFFObjectWriter.cpp b/llvm/lib/MC/GOFFObjectWriter.cpp
index d68f4af86752f..71bd39763956e 100644
--- a/llvm/lib/MC/GOFFObjectWriter.cpp
+++ b/llvm/lib/MC/GOFFObjectWriter.cpp
@@ -440,7 +440,7 @@ class TextStream : public raw_ostream {
     SetBuffer(Buffer, sizeof(Buffer));
   }
 
-  ~TextStream() { flush(); }
+  ~TextStream() override { flush(); }
 };
 } // namespace
 
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index be8c022f39ad1..885fa55b65d50 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/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;
 
diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index acea3ab23680a..dd1bc2be5feb4 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/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;
diff --git a/llvm/lib/MC/XCOFFObjectWriter.cpp b/llvm/lib/MC/XCOFFObjectWriter.cpp
index fce6b2ac5cf8d..d466009348c47 100644
--- a/llvm/lib/MC/XCOFFObjectWriter.cpp
+++ b/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);
diff --git a/llvm/unittests/MC/SystemZ/SystemZMCDisassemblerTest.cpp b/llvm/unittests/MC/SystemZ/SystemZMCDisassemblerTest.cpp
index 01ff1f37f434b..87fad37635320 100644
--- a/llvm/unittests/MC/SystemZ/SystemZMCDisassemblerTest.cpp
+++ b/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,
diff --git a/llvm/unittests/MC/X86/X86MCDisassemblerTest.cpp b/llvm/unittests/MC/X86/X86MCDisassemblerTest.cpp
index 8d4e46c081e19..286528fdd21c3 100644
--- a/llvm/unittests/MC/X86/X86MCDisassemblerTest.cpp
+++ b/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;