diff --git a/clang/docs/LibASTMatchersReference.html b/clang/docs/LibASTMatchersReference.html
--- a/clang/docs/LibASTMatchersReference.html
+++ b/clang/docs/LibASTMatchersReference.html
@@ -5038,7 +5038,7 @@
 <tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('isExpandedFromMacro1')"><a name="isExpandedFromMacro1Anchor">isExpandedFromMacro</a></td><td>std::string MacroName</td></tr>
 <tr><td colspan="4" class="doc" id="isExpandedFromMacro1"><pre>Matches statements that are (transitively) expanded from the named macro.
 Does not match if only part of the statement is expanded from that macro or
-if different parts of the the statement are expanded from different
+if different parts of the statement are expanded from different
 appearances of the macro.
 </pre></td></tr>
 
diff --git a/clang/include/clang/AST/ASTStructuralEquivalence.h b/clang/include/clang/AST/ASTStructuralEquivalence.h
--- a/clang/include/clang/AST/ASTStructuralEquivalence.h
+++ b/clang/include/clang/AST/ASTStructuralEquivalence.h
@@ -117,7 +117,7 @@
   static llvm::Optional<unsigned>
   findUntaggedStructOrUnionIndex(RecordDecl *Anon);
 
-  // If ErrorOnTagTypeMismatch is set, return the the error, otherwise get the
+  // If ErrorOnTagTypeMismatch is set, return the error, otherwise get the
   // relevant warning for the input error diagnostic.
   unsigned getApplicableDiagnostic(unsigned ErrorDiagnostic);
 
diff --git a/clang/include/clang/AST/ComparisonCategories.h b/clang/include/clang/AST/ComparisonCategories.h
--- a/clang/include/clang/AST/ComparisonCategories.h
+++ b/clang/include/clang/AST/ComparisonCategories.h
@@ -145,7 +145,7 @@
     return Kind == CCK::PartialOrdering;
   }
 
-  /// Converts the specified result kind into the the correct result kind
+  /// Converts the specified result kind into the correct result kind
   /// for this category. Specifically it lowers strong equality results to
   /// weak equivalence if needed.
   ComparisonCategoryResult makeWeakResult(ComparisonCategoryResult Res) const {
diff --git a/clang/include/clang/AST/OpenMPClause.h b/clang/include/clang/AST/OpenMPClause.h
--- a/clang/include/clang/AST/OpenMPClause.h
+++ b/clang/include/clang/AST/OpenMPClause.h
@@ -2005,13 +2005,13 @@
     return IsExtended ? 2 : 0;
   }
 
-  /// Sets the the location of '(' in clause for 'depobj' directive.
+  /// Sets the location of '(' in clause for 'depobj' directive.
   void setLParenLoc(SourceLocation Loc) {
     assert(IsExtended && "Expected extended clause.");
     *getTrailingObjects<SourceLocation>() = Loc;
   }
 
-  /// Sets the the location of '(' in clause for 'depobj' directive.
+  /// Sets the location of '(' in clause for 'depobj' directive.
   void setArgumentLoc(SourceLocation Loc) {
     assert(IsExtended && "Expected extended clause.");
     *std::next(getTrailingObjects<SourceLocation>(), 1) = Loc;
@@ -2085,13 +2085,13 @@
     return const_child_range(const_child_iterator(), const_child_iterator());
   }
 
-  /// Gets the the location of '(' in clause for 'depobj' directive.
+  /// Gets the location of '(' in clause for 'depobj' directive.
   SourceLocation getLParenLoc() const {
     assert(IsExtended && "Expected extended clause.");
     return *getTrailingObjects<SourceLocation>();
   }
 
-  /// Gets the the location of argument in clause for 'depobj' directive.
+  /// Gets the location of argument in clause for 'depobj' directive.
   SourceLocation getArgumentLoc() const {
     assert(IsExtended && "Expected extended clause.");
     return *std::next(getTrailingObjects<SourceLocation>(), 1);
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -308,7 +308,7 @@
 
 /// Matches statements that are (transitively) expanded from the named macro.
 /// Does not match if only part of the statement is expanded from that macro or
-/// if different parts of the the statement are expanded from different
+/// if different parts of the statement are expanded from different
 /// appearances of the macro.
 AST_POLYMORPHIC_MATCHER_P(isExpandedFromMacro,
                           AST_POLYMORPHIC_SUPPORTED_TYPES(Decl, Stmt, TypeLoc),
diff --git a/clang/include/clang/DirectoryWatcher/DirectoryWatcher.h b/clang/include/clang/DirectoryWatcher/DirectoryWatcher.h
--- a/clang/include/clang/DirectoryWatcher/DirectoryWatcher.h
+++ b/clang/include/clang/DirectoryWatcher/DirectoryWatcher.h
@@ -20,7 +20,7 @@
 /// Provides notifications for file changes in a directory.
 ///
 /// Invokes client-provided function on every filesystem event in the watched
-/// directory. Initially the the watched directory is scanned and for every file
+/// directory. Initially the watched directory is scanned and for every file
 /// found, an event is synthesized as if the file was added.
 ///
 /// This is not a general purpose directory monitoring tool - list of
diff --git a/clang/include/clang/Tooling/Transformer/RangeSelector.h b/clang/include/clang/Tooling/Transformer/RangeSelector.h
--- a/clang/include/clang/Tooling/Transformer/RangeSelector.h
+++ b/clang/include/clang/Tooling/Transformer/RangeSelector.h
@@ -50,7 +50,7 @@
 /// Selects the (empty) range [B,B) when \p Selector selects the range [B,E).
 RangeSelector before(RangeSelector Selector);
 
-/// Selects the the point immediately following \p Selector. That is, the
+/// Selects the point immediately following \p Selector. That is, the
 /// (empty) range [E,E), when \p Selector selects either
 /// * the CharRange [B,E) or
 /// * the TokenRange [B,E'] where the token at E' spans the range [E',E).
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -4961,7 +4961,7 @@
 
   auto *GEP = cast<llvm::GEPOperator>(GEPVal);
   assert(GEP->getPointerOperand() == BasePtr &&
-         "BasePtr must be the the base of the GEP.");
+         "BasePtr must be the base of the GEP.");
   assert(GEP->isInBounds() && "Expected inbounds GEP");
 
   auto *IntPtrTy = DL.getIntPtrType(GEP->getPointerOperandType());
diff --git a/clang/lib/Lex/PPDirectives.cpp b/clang/lib/Lex/PPDirectives.cpp
--- a/clang/lib/Lex/PPDirectives.cpp
+++ b/clang/lib/Lex/PPDirectives.cpp
@@ -112,7 +112,7 @@
 // the specified module, meaning clang won't build the specified module. This is
 // useful in a number of situations, for instance, when building a library that
 // vends a module map, one might want to avoid hitting intermediate build
-// products containing the the module map or avoid finding the system installed
+// products containimg the module map or avoid finding the system installed
 // modulemap for that library.
 static bool isForModuleBuilding(Module *M, StringRef CurrentModule,
                                 StringRef ModuleName) {
diff --git a/clang/lib/Sema/SemaAvailability.cpp b/clang/lib/Sema/SemaAvailability.cpp
--- a/clang/lib/Sema/SemaAvailability.cpp
+++ b/clang/lib/Sema/SemaAvailability.cpp
@@ -57,7 +57,7 @@
 /// \param D The declaration to check.
 /// \param Message If non-null, this will be populated with the message from
 /// the availability attribute that is selected.
-/// \param ClassReceiver If we're checking the the method of a class message
+/// \param ClassReceiver If we're checking the method of a class message
 /// send, the class. Otherwise nullptr.
 static std::pair<AvailabilityResult, const NamedDecl *>
 ShouldDiagnoseAvailabilityOfDecl(Sema &S, const NamedDecl *D,