Author: Baranov Victor
Date: 2026-08-04T16:34:43+03:00
New Revision: 0bbee28fd45f1ca5780d5db842261262f201e7d1

URL: 
https://github.com/llvm/llvm-project/commit/0bbee28fd45f1ca5780d5db842261262f201e7d1
DIFF: 
https://github.com/llvm/llvm-project/commit/0bbee28fd45f1ca5780d5db842261262f201e7d1.diff

LOG: [clang-tidy][NFC] Apply const-correctness for auto 4/N (#213842)

Added: 
    

Modified: 
    clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/MisleadingCaptureDefaultByValueCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/MissingStdForwardCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/NoSuspendWithLockCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/OwningMemoryCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/PreferMemberInitializerCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsAvoidUncheckedContainerAccessCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsConstantArrayIndexCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/RvalueReferenceParamNotMovedCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/UseEnumClassCheck.cpp
    
clang-tools-extra/clang-tidy/cppcoreguidelines/VirtualClassDestructorCheck.cpp
    clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.cpp
    clang-tools-extra/clang-tidy/llvm/PreferIsaOrDynCastInConditionalsCheck.cpp
    clang-tools-extra/clang-tidy/llvm/PreferRegisterOverUnsignedCheck.cpp
    clang-tools-extra/clang-tidy/llvm/RedundantCastingCheck.cpp
    clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp
    clang-tools-extra/clang-tidy/llvm/TypeSwitchCaseTypesCheck.cpp
    clang-tools-extra/clang-tidy/llvm/UseNewMLIROpBuilderCheck.cpp
    clang-tools-extra/clang-tidy/llvm/UseVectorUtilsCheck.cpp
    clang-tools-extra/clang-tidy/llvmlibc/InlineFunctionDeclCheck.cpp
    clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
    clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
    clang-tools-extra/clang-tidy/objc/AssertEqualsCheck.cpp
    clang-tools-extra/clang-tidy/objc/NSInvocationArgumentLifetimeCheck.cpp
    clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
    clang-tools-extra/clang-tidy/objc/SuperSelfCheck.cpp
    clang-tools-extra/clang-tidy/performance/AvoidEndlCheck.cpp

Removed: 
    


################################################################################
diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
index 4fb0029cc4323..a8b2e24f13c8f 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidGotoCheck.cpp
@@ -38,8 +38,8 @@ void AvoidGotoCheck::registerMatchers(MatchFinder *Finder) {
 
   // Check if the 'goto' is used for control flow other than jumping
   // out of a nested loop.
-  auto Loop = mapAnyOf(forStmt, cxxForRangeStmt, whileStmt, doStmt);
-  auto NestedLoop = Loop.with(hasAncestor(Loop));
+  const auto Loop = mapAnyOf(forStmt, cxxForRangeStmt, whileStmt, doStmt);
+  const auto NestedLoop = Loop.with(hasAncestor(Loop));
 
   const ast_matchers::internal::Matcher<GotoStmt> Anything = anything();
 

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
index 7f5e27d4554db..ee30b22fb1700 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/AvoidNonConstGlobalVariablesCheck.cpp
@@ -25,11 +25,11 @@ void 
AvoidNonConstGlobalVariablesCheck::registerMatchers(MatchFinder *Finder) {
   auto NamespaceMatcher = AllowInternalLinkage
                               ? namespaceDecl(unless(isAnonymous()))
                               : namespaceDecl();
-  auto GlobalContext =
+  const auto GlobalContext =
       varDecl(hasGlobalStorage(),
               hasDeclContext(anyOf(NamespaceMatcher, translationUnitDecl())));
 
-  auto GlobalVariable = varDecl(
+  const auto GlobalVariable = varDecl(
       GlobalContext,
       AllowInternalLinkage ? varDecl(unless(isStaticStorageClass()))
                            : varDecl(),
@@ -40,11 +40,11 @@ void 
AvoidNonConstGlobalVariablesCheck::registerMatchers(MatchFinder *Finder) {
           hasType(referenceType())))); // References can't be changed, only the
                                        // data they reference can be changed.
 
-  auto GlobalReferenceToNonConst =
+  const auto GlobalReferenceToNonConst =
       varDecl(GlobalContext, hasType(referenceType()),
               unless(hasType(references(qualType(isConstQualified())))));
 
-  auto GlobalPointerToNonConst = varDecl(
+  const auto GlobalPointerToNonConst = varDecl(
       GlobalContext, 
hasType(pointerType(pointee(unless(isConstQualified())))));
 
   Finder->addMatcher(GlobalVariable.bind("non-const_variable"), this);

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
index cf3e97ad500ab..500f0e266d481 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp
@@ -108,7 +108,7 @@ void InitVariablesCheck::check(const 
MatchFinder::MatchResult &Result) {
   }
 
   if (InitializationString) {
-    auto Diagnostic =
+    const auto Diagnostic =
         diag(MatchedDecl->getLocation(), "variable %0 is not initialized")
         << MatchedDecl;
     if (*InitializationString != nullptr)

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/MisleadingCaptureDefaultByValueCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/MisleadingCaptureDefaultByValueCheck.cpp
index a8f2dcc8f5e1b..57b72b5b9a02f 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/MisleadingCaptureDefaultByValueCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/MisleadingCaptureDefaultByValueCheck.cpp
@@ -48,7 +48,7 @@ static std::string createReplacementText(const LambdaExpr 
*Lambda) {
   std::string Replacement;
   llvm::raw_string_ostream Stream(Replacement);
 
-  auto AppendName = [&](StringRef Name) {
+  const auto AppendName = [&](StringRef Name) {
     if (!Replacement.empty())
       Stream << ", ";
     if (Lambda->getCaptureDefault() == LCD_ByRef && Name != "this")
@@ -81,10 +81,10 @@ void MisleadingCaptureDefaultByValueCheck::check(
     const bool IsThisImplicitlyCaptured = std::any_of(
         Lambda->implicit_capture_begin(), Lambda->implicit_capture_end(),
         [](const LambdaCapture &Capture) { return Capture.capturesThis(); });
-    auto Diag = diag(Lambda->getCaptureDefaultLoc(),
-                     "lambdas that %select{|implicitly }0capture 'this' "
-                     "should not specify a by-value capture default")
-                << IsThisImplicitlyCaptured;
+    const auto Diag = diag(Lambda->getCaptureDefaultLoc(),
+                           "lambdas that %select{|implicitly }0capture 'this' "
+                           "should not specify a by-value capture default")
+                      << IsThisImplicitlyCaptured;
 
     const std::string ReplacementText = createReplacementText(Lambda);
     const SourceLocation DefaultCaptureEnd =

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/MissingStdForwardCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/MissingStdForwardCheck.cpp
index 8c998778f096b..4a77bd7948615 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/MissingStdForwardCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/MissingStdForwardCheck.cpp
@@ -104,7 +104,7 @@ AST_MATCHER_P(ValueDecl, refersToBoundParm, std::string, 
ParamID) {
 } // namespace
 
 void MissingStdForwardCheck::registerMatchers(MatchFinder *Finder) {
-  auto CapturedVar = varDecl(refersToBoundParm("param"));
+  const auto CapturedVar = varDecl(refersToBoundParm("param"));
 
   auto CaptureInRef =
       allOf(hasCaptureDefaultKind(LambdaCaptureDefault::LCD_ByRef),
@@ -123,9 +123,9 @@ void MissingStdForwardCheck::registerMatchers(MatchFinder 
*Finder) {
                       anyOf(CapturedInCaptureList, CapturedInBody),
                       hasAncestor(functionDecl(equalsBoundNode("func")))))));
 
-  auto ToParam = hasAnyParameter(parmVarDecl(equalsBoundNode("param")));
+  const auto ToParam = hasAnyParameter(parmVarDecl(equalsBoundNode("param")));
 
-  auto ForwardCallMatcher =
+  const auto ForwardCallMatcher =
       callExpr(callExpr().bind("call"), argumentCountIs(1),
                hasArgument(0, declRefExpr(to(CapturedVar)).bind("var")),
                forCallable(anyOf(equalsBoundNode("func"), CapturedInLambda)),

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/NoSuspendWithLockCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/NoSuspendWithLockCheck.cpp
index f2460aec3b2fd..80172bdb06472 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/NoSuspendWithLockCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/NoSuspendWithLockCheck.cpp
@@ -23,7 +23,7 @@ void 
NoSuspendWithLockCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
 }
 
 void NoSuspendWithLockCheck::registerMatchers(MatchFinder *Finder) {
-  auto LockType = templateSpecializationType(
+  const auto LockType = templateSpecializationType(
       hasDeclaration(namedDecl(matchers::matchesAnyListedRegexName(
           utils::options::parseStringList(LockGuards)))));
 

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/OwningMemoryCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/OwningMemoryCheck.cpp
index f4e89470a80da..161e17c47b1f5 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/OwningMemoryCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/OwningMemoryCheck.cpp
@@ -155,7 +155,7 @@ void OwningMemoryCheck::registerMatchers(MatchFinder 
*Finder) {
                              .bind("bad_owner_creation_parameter"))),
                      this);
 
-  auto IsNotInSubLambda = stmt(
+  const auto IsNotInSubLambda = stmt(
       hasAncestor(
           stmt(anyOf(equalsBoundNode("body"), lambdaExpr())).bind("scope")),
       hasAncestor(stmt(equalsBoundNode("scope"), equalsBoundNode("body"))));

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/PreferMemberInitializerCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/PreferMemberInitializerCheck.cpp
index f04b5e87a084c..74c47e23044f4 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/PreferMemberInitializerCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/PreferMemberInitializerCheck.cpp
@@ -67,7 +67,7 @@ static bool canAdvanceAssignment(AssignedLevel Level) {
 static void updateAssignmentLevel(
     const FieldDecl *Field, const Expr *Init, const CXXConstructorDecl *Ctor,
     llvm::DenseMap<const FieldDecl *, AssignedLevel> &AssignedFields) {
-  auto It = AssignedFields.try_emplace(Field, AssignedLevel::None).first;
+  const auto It = AssignedFields.try_emplace(Field, AssignedLevel::None).first;
 
   if (!canAdvanceAssignment(It->second))
     // fast path for already decided field.
@@ -275,9 +275,10 @@ void PreferMemberInitializerCheck::check(
     else
       InvalidFix = true;
 
-    auto Diag = diag(S->getBeginLoc(), "%0 should be initialized in a member"
-                                       " initializer of the constructor")
-                << Field;
+    const auto Diag =
+        diag(S->getBeginLoc(), "%0 should be initialized in a member"
+                               " initializer of the constructor")
+        << Field;
     if (InvalidFix)
       continue;
     const StringRef NewInit = Lexer::getSourceText(

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsAvoidUncheckedContainerAccessCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsAvoidUncheckedContainerAccessCheck.cpp
index 83afaa07b37ed..2622647455c08 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsAvoidUncheckedContainerAccessCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsAvoidUncheckedContainerAccessCheck.cpp
@@ -153,11 +153,12 @@ void ProBoundsAvoidUncheckedContainerAccessCheck::check(
           MatchedExpr->getDirectCallee()->getNumParams() == 0;
 
       if (EmptySubscript) {
-        auto D = diag(MatchedExpr->getCallee()->getBeginLoc(),
-                      "possibly unsafe 'operator[]'%select{, use safe "
-                      "function '%1() instead|}0")
-                 << FixFunctionEmptyArgs.empty() << FixFunctionEmptyArgs.str()
-                 << MatchedExpr->getCallee()->getSourceRange();
+        const auto D = diag(MatchedExpr->getCallee()->getBeginLoc(),
+                            "possibly unsafe 'operator[]'%select{, use safe "
+                            "function '%1() instead|}0")
+                       << FixFunctionEmptyArgs.empty()
+                       << FixFunctionEmptyArgs.str()
+                       << MatchedExpr->getCallee()->getSourceRange();
         if (!FixFunctionEmptyArgs.empty()) {
           D << FixItHint::CreateInsertion(OCE->getArg(0)->getBeginLoc(),
                                           FixFunctionEmptyArgs.str() + "(")
@@ -219,11 +220,12 @@ void ProBoundsAvoidUncheckedContainerAccessCheck::check(
       // Since C++23, the subscript operator may also be called without an
       // argument, which makes the following distinction necessary
       if (EmptySubscript) {
-        auto D = diag(MatchedExpr->getCallee()->getBeginLoc(),
-                      "possibly unsafe 'operator[]'%select{, use safe "
-                      "function '%1()' instead|}0")
-                 << FixFunctionEmptyArgs.empty() << FixFunctionEmptyArgs.str()
-                 << Callee->getSourceRange();
+        const auto D = diag(MatchedExpr->getCallee()->getBeginLoc(),
+                            "possibly unsafe 'operator[]'%select{, use safe "
+                            "function '%1()' instead|}0")
+                       << FixFunctionEmptyArgs.empty()
+                       << FixFunctionEmptyArgs.str()
+                       << Callee->getSourceRange();
 
         if (!FixFunctionEmptyArgs.empty()) {
           D << FixItHint::CreateInsertion(MatchedExpr->getBeginLoc(),

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsConstantArrayIndexCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsConstantArrayIndexCheck.cpp
index 82fc9f253ac1c..5b478b3cb8135 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsConstantArrayIndexCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProBoundsConstantArrayIndexCheck.cpp
@@ -80,9 +80,9 @@ void ProBoundsConstantArrayIndexCheck::check(
           cast<CXXOperatorCallExpr>(Matched)->getArg(0)->getSourceRange();
     const SourceRange IndexRange = IndexExpr->getSourceRange();
 
-    auto Diag = diag(Matched->getExprLoc(),
-                     "do not use array subscript when the index is "
-                     "not an integer constant expression");
+    const auto Diag = diag(Matched->getExprLoc(),
+                           "do not use array subscript when the index is "
+                           "not an integer constant expression");
     if (!GslHeader.empty()) {
       Diag << FixItHint::CreateInsertion(BaseRange.getBegin(), "gsl::at(")
            << FixItHint::CreateReplacement(

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
index fcd9c6d37d99f..d9af322455754 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
@@ -64,7 +64,7 @@ void ProTypeCstyleCastCheck::check(const 
MatchFinder::MatchResult &Result) {
               MatchedCast->getRParenLoc().getLocWithOffset(-1)),
           *Result.SourceManager, getLangOpts());
 
-      auto DiagBuilder = diag(
+      const auto DiagBuilder = diag(
           MatchedCast->getBeginLoc(),
           "do not use C-style cast to downcast from a base to a derived class; 
"
           "use dynamic_cast instead");
@@ -79,7 +79,7 @@ void ProTypeCstyleCastCheck::check(const 
MatchFinder::MatchResult &Result) {
                                        *Result.SourceManager, getLangOpts()),
             ")");
       }
-      auto ParenRange = CharSourceRange::getTokenRange(
+      const auto ParenRange = CharSourceRange::getTokenRange(
           MatchedCast->getLParenLoc(), MatchedCast->getRParenLoc());
       DiagBuilder << FixItHint::CreateReplacement(ParenRange, CastText);
     } else {

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
index 0d51717a88ef4..b507ab16798ad 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
@@ -79,7 +79,7 @@ removeFieldInitialized(const FieldDecl *M,
 static void
 removeFieldsInitializedInBody(const Stmt &Stmt, ASTContext &Context,
                               SmallPtrSetImpl<const FieldDecl *> &FieldDecls) {
-  auto Matches =
+  const auto Matches =
       match(findAll(binaryOperator(
                 hasOperatorName("="),
                 hasLHS(memberExpr(member(fieldDecl().bind("fieldDecl")))))),
@@ -321,7 +321,7 @@ void ProTypeMemberInitCheck::registerMatchers(MatchFinder 
*Finder) {
           .bind("record"),
       this);
 
-  auto HasDefaultConstructor = hasInitializer(
+  const auto HasDefaultConstructor = hasInitializer(
       cxxConstructExpr(unless(requiresZeroInitialization()),
                        hasDeclaration(cxxConstructorDecl(
                            isDefaultConstructor(), 
unless(isUserProvided())))));

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
index daa9f983b7886..95a6f2486b4a3 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
@@ -69,8 +69,8 @@ AST_MATCHER(QualType, isVAList) {
   const QualType Desugar = Node.getDesugaredType(Context);
   const QualType NodeTy = Node.getUnqualifiedType();
 
-  auto CheckVaList = [](QualType NodeTy, QualType Expected,
-                        const ASTContext &Context) {
+  const auto CheckVaList = [](QualType NodeTy, QualType Expected,
+                              const ASTContext &Context) {
     if (NodeTy == Expected)
       return true;
     QualType Desugar = NodeTy;
@@ -159,7 +159,7 @@ static bool hasSingleVariadicArgumentWithValue(const 
CallExpr *C, uint64_t I) {
   if (!FDecl)
     return false;
 
-  auto N = FDecl->getNumParams(); // Number of parameters without '...'
+  const auto N = FDecl->getNumParams(); // Number of parameters without '...'
   if (C->getNumArgs() != N + 1)
     return false; // more/less than one argument passed to '...'
 
@@ -195,7 +195,7 @@ void ProTypeVarargCheck::check(const 
MatchFinder::MatchResult &Result) {
     diag(Matched->getExprLoc(), VaArgWarningMessage);
 
   if (const auto *Matched = Result.Nodes.getNodeAs<VarDecl>("va_list")) {
-    auto SR = Matched->getSourceRange();
+    const auto SR = Matched->getSourceRange();
     if (SR.isInvalid())
       return; // some implicitly generated builtins take va_list
     diag(SR.getBegin(), "do not declare variables of type va_list; "

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/RvalueReferenceParamNotMovedCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/RvalueReferenceParamNotMovedCheck.cpp
index 44b1eb3fa169e..22bb053663831 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/RvalueReferenceParamNotMovedCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/RvalueReferenceParamNotMovedCheck.cpp
@@ -36,7 +36,7 @@ AST_MATCHER_P2(Stmt, argumentOf, bool, AllowPartialMove, 
StatementMatcher,
 } // namespace
 
 void RvalueReferenceParamNotMovedCheck::registerMatchers(MatchFinder *Finder) {
-  auto ToParam = hasAnyParameter(parmVarDecl(equalsBoundNode("param")));
+  const auto ToParam = hasAnyParameter(parmVarDecl(equalsBoundNode("param")));
 
   const StatementMatcher MoveCallMatcher =
       callExpr(

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
index 6f2ab250e441b..2b4034517a082 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
@@ -125,7 +125,7 @@ void SpecialMemberFunctionsCheck::check(
   ClassDefId ID(MatchedDecl->getLocation(),
                 std::string(MatchedDecl->getName()));
 
-  auto StoreMember = [this, &ID](SpecialMemberFunctionData Data) {
+  const auto StoreMember = [this, &ID](SpecialMemberFunctionData Data) {
     SmallVectorImpl<SpecialMemberFunctionData> &Members =
         ClassWithSpecialMembers[ID];
     if (!llvm::is_contained(Members, Data))
@@ -179,14 +179,14 @@ void SpecialMemberFunctionsCheck::checkForMissingMembers(
     });
   };
 
-  auto IsDeleted = [&](SpecialMemberFunctionKind Kind) {
+  const auto IsDeleted = [&](SpecialMemberFunctionKind Kind) {
     return llvm::any_of(DefinedMembers, [Kind](const auto &Data) {
       return Data.FunctionKind == Kind && Data.IsDeleted;
     });
   };
 
-  auto RequireMembers = [&](SpecialMemberFunctionKind Kind1,
-                            SpecialMemberFunctionKind Kind2) {
+  const auto RequireMembers = [&](SpecialMemberFunctionKind Kind1,
+                                  SpecialMemberFunctionKind Kind2) {
     if (AllowImplicitlyDeletedCopyOrMove && HasImplicitDeletedMember(Kind1) &&
         HasImplicitDeletedMember(Kind2))
       return;

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/UseEnumClassCheck.cpp 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/UseEnumClassCheck.cpp
index a79519325e745..84720d10c233e 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/UseEnumClassCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/UseEnumClassCheck.cpp
@@ -26,7 +26,7 @@ void 
UseEnumClassCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
 }
 
 void UseEnumClassCheck::registerMatchers(MatchFinder *Finder) {
-  auto EnumDecl =
+  const auto EnumDecl =
       IgnoreUnscopedEnumsInClasses
           ? enumDecl(unless(isScoped()), unless(hasParent(recordDecl())))
           : enumDecl(unless(isScoped()));

diff  --git 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/VirtualClassDestructorCheck.cpp
 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/VirtualClassDestructorCheck.cpp
index e6b06d3ec4dcb..e43a652ed9d0c 100644
--- 
a/clang-tools-extra/clang-tidy/cppcoreguidelines/VirtualClassDestructorCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/cppcoreguidelines/VirtualClassDestructorCheck.cpp
@@ -159,7 +159,7 @@ static FixItHint changePrivateDestructorVisibilityTo(
   else
     EndLocation = Destructor.getEndLoc().getLocWithOffset(1);
 
-  auto OriginalDestructorRange =
+  const auto OriginalDestructorRange =
       CharSourceRange::getCharRange(Destructor.getBeginLoc(), EndLocation);
   return FixItHint::CreateReplacement(OriginalDestructorRange,
                                       DestructorString);

diff  --git a/clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.cpp
index 93f13c8770481..0b0ca54dfc21e 100644
--- a/clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.cpp
@@ -151,8 +151,8 @@ void IncludeOrderPPCallbacks::EndOfMainFile() {
         continue;
 
       // Emit a warning.
-      auto D = Check.diag(FileDirectives[I].Loc,
-                          "#includes are not sorted properly");
+      const auto D = Check.diag(FileDirectives[I].Loc,
+                                "#includes are not sorted properly");
 
       // Emit fix-its for all following includes in this block.
       for (; I != E; ++I) {
@@ -169,7 +169,7 @@ void IncludeOrderPPCallbacks::EndOfMainFile() {
         const SourceLocation ToLoc = FileDirectives[I].Range.getBegin();
         const char *ToData = SM.getCharacterData(ToLoc);
         const unsigned ToLen = std::strcspn(ToData, "\n");
-        auto ToRange =
+        const auto ToRange =
             CharSourceRange::getCharRange(ToLoc, 
ToLoc.getLocWithOffset(ToLen));
 
         D << FixItHint::CreateReplacement(ToRange, FixedName);

diff  --git 
a/clang-tools-extra/clang-tidy/llvm/PreferIsaOrDynCastInConditionalsCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/PreferIsaOrDynCastInConditionalsCheck.cpp
index 7c9833aa6ee24..584568a6ef154 100644
--- 
a/clang-tools-extra/clang-tidy/llvm/PreferIsaOrDynCastInConditionalsCheck.cpp
+++ 
b/clang-tools-extra/clang-tidy/llvm/PreferIsaOrDynCastInConditionalsCheck.cpp
@@ -22,7 +22,7 @@ AST_MATCHER(Expr, isMacroID) { return 
Node.getExprLoc().isMacroID(); }
 
 void PreferIsaOrDynCastInConditionalsCheck::registerMatchers(
     MatchFinder *Finder) {
-  auto AnyCalleeName = [](ArrayRef<StringRef> CalleeName) {
+  const auto AnyCalleeName = [](ArrayRef<StringRef> CalleeName) {
     return allOf(unless(isMacroID()), unless(cxxMemberCallExpr()),
                  callee(expr(ignoringImpCasts(
                      declRefExpr(to(namedDecl(hasAnyName(CalleeName))),
@@ -33,13 +33,13 @@ void 
PreferIsaOrDynCastInConditionalsCheck::registerMatchers(
   auto CondExpr = hasCondition(implicitCastExpr(
       has(callExpr(AnyCalleeName({"cast", "dyn_cast"})).bind("cond"))));
 
-  auto CondExprOrCondVar =
+  const auto CondExprOrCondVar =
       anyOf(hasConditionVariableStatement(containsDeclaration(
                 0, varDecl(hasInitializer(callExpr(AnyCalleeName({"cast"}))))
                        .bind("var"))),
             CondExpr);
 
-  auto CallWithBindedArg =
+  const auto CallWithBindedArg =
       callExpr(
           AnyCalleeName(
               {"isa", "cast", "cast_or_null", "dyn_cast", "dyn_cast_or_null"}),
@@ -94,7 +94,7 @@ void PreferIsaOrDynCastInConditionalsCheck::check(
     assert(RHS && "RHS is null");
     assert(Arg && "Arg is null");
 
-    auto GetText = [&](SourceRange R) {
+    const auto GetText = [&](SourceRange R) {
       return Lexer::getSourceText(CharSourceRange::getTokenRange(R),
                                   *Result.SourceManager, getLangOpts());
     };

diff  --git 
a/clang-tools-extra/clang-tidy/llvm/PreferRegisterOverUnsignedCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/PreferRegisterOverUnsignedCheck.cpp
index c5ee240b64ea8..60baee7fdba6a 100644
--- a/clang-tools-extra/clang-tidy/llvm/PreferRegisterOverUnsignedCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/PreferRegisterOverUnsignedCheck.cpp
@@ -14,7 +14,7 @@ using namespace clang::ast_matchers;
 namespace clang::tidy::llvm_check {
 
 void PreferRegisterOverUnsignedCheck::registerMatchers(MatchFinder *Finder) {
-  auto RegisterClassMatch = hasType(
+  const auto RegisterClassMatch = hasType(
       cxxRecordDecl(hasName("::llvm::Register")).bind("registerClassDecl"));
 
   Finder->addMatcher(

diff  --git a/clang-tools-extra/clang-tidy/llvm/RedundantCastingCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/RedundantCastingCheck.cpp
index 16a55b3ab1a12..1b2b1ed6118e8 100644
--- a/clang-tools-extra/clang-tidy/llvm/RedundantCastingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/RedundantCastingCheck.cpp
@@ -47,9 +47,9 @@ static constexpr StringRef IsaFunctionNames[] = {"isa", 
"isa_and_nonnull",
                                                  "isa_and_present"};
 
 void RedundantCastingCheck::registerMatchers(MatchFinder *Finder) {
-  auto IsInLLVMNamespace = hasDeclContext(
+  const auto IsInLLVMNamespace = hasDeclContext(
       namespaceDecl(hasName("llvm"), hasDeclContext(translationUnitDecl())));
-  auto AnyCastCalleeName =
+  const auto AnyCastCalleeName =
       allOf(unless(isMacroID()), unless(cxxMemberCallExpr()),
             callee(expr(declRefExpr(to(namedDecl(hasAnyName(CastFunctionNames),
                                                  IsInLLVMNamespace)),
@@ -67,7 +67,7 @@ void RedundantCastingCheck::registerMatchers(MatchFinder 
*Finder) {
           .bind("call"),
       this);
 
-  auto AnyIsaCalleeName =
+  const auto AnyIsaCalleeName =
       allOf(unless(isMacroID()), unless(cxxMemberCallExpr()),
             callee(expr(declRefExpr(to(namedDecl(hasAnyName(IsaFunctionNames),
                                                  IsInLLVMNamespace)),
@@ -103,7 +103,7 @@ static QualType stripPointerOrReference(QualType Ty) {
 static bool isLLVMNamespace(NestedNameSpecifier NNS) {
   if (NNS.getKind() != NestedNameSpecifier::Kind::Namespace)
     return false;
-  auto Pair = NNS.getAsNamespaceAndPrefix();
+  const auto Pair = NNS.getAsNamespaceAndPrefix();
   if (Pair.Namespace->getNamespace()->getName() != "llvm")
     return false;
   const NestedNameSpecifier::Kind Kind = Pair.Prefix.getKind();

diff  --git a/clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp
index 7dea84516502b..dc872cdb38e53 100644
--- a/clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp
@@ -16,7 +16,7 @@ using namespace clang::ast_matchers;
 namespace clang::tidy::llvm_check {
 
 void TwineLocalCheck::registerMatchers(MatchFinder *Finder) {
-  auto TwineType =
+  const auto TwineType =
       qualType(hasDeclaration(cxxRecordDecl(hasName("::llvm::Twine"))));
   Finder->addMatcher(
       varDecl(unless(parmVarDecl()), hasType(TwineType)).bind("variable"),
@@ -25,8 +25,8 @@ void TwineLocalCheck::registerMatchers(MatchFinder *Finder) {
 
 void TwineLocalCheck::check(const MatchFinder::MatchResult &Result) {
   const auto *VD = Result.Nodes.getNodeAs<VarDecl>("variable");
-  auto Diag = diag(VD->getLocation(),
-                   "twine variables are prone to use-after-free bugs");
+  const auto Diag = diag(VD->getLocation(),
+                         "twine variables are prone to use-after-free bugs");
 
   // If this VarDecl has an initializer try to fix it.
   if (VD->hasInit()) {

diff  --git a/clang-tools-extra/clang-tidy/llvm/TypeSwitchCaseTypesCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/TypeSwitchCaseTypesCheck.cpp
index 98453c21ca822..0d89c1cbe9933 100644
--- a/clang-tools-extra/clang-tidy/llvm/TypeSwitchCaseTypesCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/TypeSwitchCaseTypesCheck.cpp
@@ -84,7 +84,8 @@ void TypeSwitchCaseTypesCheck::check(const 
MatchFinder::MatchResult &Result) {
       ParamBaseType->getCanonicalTypeUnqualified())
     return;
 
-  auto Diag = diag(Call->getExprLoc(), "redundant explicit template argument");
+  const auto Diag =
+      diag(Call->getExprLoc(), "redundant explicit template argument");
 
   // Skip fixit if template argument involves macros.
   const SourceLocation LAngleLoc = MemExpr->getLAngleLoc();

diff  --git a/clang-tools-extra/clang-tidy/llvm/UseNewMLIROpBuilderCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/UseNewMLIROpBuilderCheck.cpp
index ca3e778e573c1..346cace9ce994 100644
--- a/clang-tools-extra/clang-tidy/llvm/UseNewMLIROpBuilderCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/UseNewMLIROpBuilderCheck.cpp
@@ -47,7 +47,7 @@ static EditGenerator rewrite(RangeSelector Call, 
RangeSelector Builder) {
 
     // This will try to extract the template argument as written so that the
     // rewritten code looks closest to original.
-    auto NextToken = [&](std::optional<Token> CurrentToken) {
+    const auto NextToken = [&](std::optional<Token> CurrentToken) {
       if (!CurrentToken)
         return CurrentToken;
       if (CurrentToken->is(tok::eof))
@@ -92,7 +92,7 @@ static EditGenerator rewrite(RangeSelector Call, 
RangeSelector Builder) {
       return BuilderRange.takeError();
 
     // Helper for concatting below.
-    auto GetText = [&](const CharSourceRange &Range) {
+    const auto GetText = [&](const CharSourceRange &Range) {
       return Lexer::getSourceText(Range, SM, LangOpts);
     };
 
@@ -120,7 +120,8 @@ static RewriteRuleWith<std::string> 
useNewMlirOpBuilderCheckRule() {
   const Stencil Message = cat("use 'OpType::create(builder, ...)' instead of "
                               "'builder.create<OpType>(...)'");
   // Match a create call on an OpBuilder.
-  auto BuilderType = cxxRecordDecl(isSameOrDerivedFrom("::mlir::OpBuilder"));
+  const auto BuilderType =
+      cxxRecordDecl(isSameOrDerivedFrom("::mlir::OpBuilder"));
   const ast_matchers::internal::Matcher<Stmt> Base =
       cxxMemberCallExpr(
           on(expr(anyOf(hasType(BuilderType), hasType(pointsTo(BuilderType))))

diff  --git a/clang-tools-extra/clang-tidy/llvm/UseVectorUtilsCheck.cpp 
b/clang-tools-extra/clang-tidy/llvm/UseVectorUtilsCheck.cpp
index bd915eb55b448..94723fded2f19 100644
--- a/clang-tools-extra/clang-tidy/llvm/UseVectorUtilsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvm/UseVectorUtilsCheck.cpp
@@ -64,7 +64,8 @@ void UseVectorUtilsCheck::check(const 
MatchFinder::MatchResult &Result) {
       InnerFuncNameToReplacementFuncName.lookup(InnerFuncName);
   assert(!ReplacementFuncName.empty() && "Unhandled function?");
 
-  auto Diag = diag(OuterCall->getBeginLoc(), "use '%0'") << 
ReplacementFuncName;
+  const auto Diag = diag(OuterCall->getBeginLoc(), "use '%0'")
+                    << ReplacementFuncName;
 
   // Replace the outer function name (preserving qualifier and template args),
   // and then remove the inner call's callee and opening paren and closing

diff  --git a/clang-tools-extra/clang-tidy/llvmlibc/InlineFunctionDeclCheck.cpp 
b/clang-tools-extra/clang-tidy/llvmlibc/InlineFunctionDeclCheck.cpp
index 69393781918e1..3120c5c6c86d5 100644
--- a/clang-tools-extra/clang-tidy/llvmlibc/InlineFunctionDeclCheck.cpp
+++ b/clang-tools-extra/clang-tidy/llvmlibc/InlineFunctionDeclCheck.cpp
@@ -74,8 +74,8 @@ void InlineFunctionDeclCheck::check(const 
MatchFinder::MatchResult &Result) {
       return;
 
   // Check if decl starts with LIBC_INLINE
-  auto Loc = FullSourceLoc(Result.SourceManager->getFileLoc(SrcBegin),
-                           *Result.SourceManager);
+  const auto Loc = FullSourceLoc(Result.SourceManager->getFileLoc(SrcBegin),
+                                 *Result.SourceManager);
   const StringRef SrcText = 
Loc.getBufferData().drop_front(Loc.getFileOffset());
   if (SrcText.starts_with("LIBC_INLINE"))
     return;

diff  --git a/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp 
b/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
index 347059e65f453..3e296b5a87173 100644
--- a/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
+++ b/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
@@ -37,8 +37,8 @@ void BufferDerefCheck::check(const MatchFinder::MatchResult 
&Result) {
 
   // Adds the type and expression of a buffer that is used in the MPI call
   // expression to the captured containers.
-  auto AddBuffer = [&CE, &Result, &BufferTypes,
-                    &BufferExprs](const size_t BufferIdx) {
+  const auto AddBuffer = [&CE, &Result, &BufferTypes,
+                          &BufferExprs](const size_t BufferIdx) {
     // Skip null pointer constants and in place 'operators'.
     if (CE->getArg(BufferIdx)->isNullPointerConstant(
             *Result.Context, Expr::NPC_ValueDependentIsNull) ||

diff  --git a/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp 
b/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
index 370a54d892809..4b360978391d2 100644
--- a/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
+++ b/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
@@ -255,8 +255,9 @@ void TypeMismatchCheck::check(const 
MatchFinder::MatchResult &Result) {
 
   // Adds a buffer, MPI datatype pair of an MPI call expression to the
   // containers. For buffers, the type and expression is captured.
-  auto AddPair = [&CE, &Result, &BufferTypes, &BufferExprs, &MPIDatatypes](
-                     const size_t BufferIdx, const size_t DatatypeIdx) {
+  const auto AddPair = [&CE, &Result, &BufferTypes, &BufferExprs,
+                        &MPIDatatypes](const size_t BufferIdx,
+                                       const size_t DatatypeIdx) {
     // Skip null pointer constants and in place 'operators'.
     if (CE->getArg(BufferIdx)->isNullPointerConstant(
             *Result.Context, Expr::NPC_ValueDependentIsNull) ||

diff  --git a/clang-tools-extra/clang-tidy/objc/AssertEqualsCheck.cpp 
b/clang-tools-extra/clang-tidy/objc/AssertEqualsCheck.cpp
index 688dd57cde1d4..c3aed13466363 100644
--- a/clang-tools-extra/clang-tidy/objc/AssertEqualsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/AssertEqualsCheck.cpp
@@ -41,7 +41,7 @@ void AssertEqualsCheck::check(
     if (const auto *Root = Result.Nodes.getNodeAs<BinaryOperator>(CurrName)) {
       const SourceManager *Sm = Result.SourceManager;
       // The macros are nested two levels, so going up twice.
-      auto MacroCallsite = Sm->getImmediateMacroCallerLoc(
+      const auto MacroCallsite = Sm->getImmediateMacroCallerLoc(
           Sm->getImmediateMacroCallerLoc(Root->getBeginLoc()));
       diag(MacroCallsite,
            (Twine("use ") + TargetName + " for comparing objects").str())

diff  --git 
a/clang-tools-extra/clang-tidy/objc/NSInvocationArgumentLifetimeCheck.cpp 
b/clang-tools-extra/clang-tidy/objc/NSInvocationArgumentLifetimeCheck.cpp
index 69caaed2b8542..a66787eb80b1d 100644
--- a/clang-tools-extra/clang-tidy/objc/NSInvocationArgumentLifetimeCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/NSInvocationArgumentLifetimeCheck.cpp
@@ -125,10 +125,11 @@ void NSInvocationArgumentLifetimeCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *MatchedExpr = Result.Nodes.getNodeAs<ObjCMessageExpr>("call");
 
-  auto Diag = diag(MatchedExpr->getArg(0)->getBeginLoc(),
-                   "NSInvocation %objcinstance0 should only pass pointers to "
-                   "objects with ownership __unsafe_unretained")
-              << MatchedExpr->getSelector();
+  const auto Diag =
+      diag(MatchedExpr->getArg(0)->getBeginLoc(),
+           "NSInvocation %objcinstance0 should only pass pointers to "
+           "objects with ownership __unsafe_unretained")
+      << MatchedExpr->getSelector();
 
   // Only provide fix-it hints for references to local variables; fixes for
   // instance variable references don't have as clear an automated fix.

diff  --git a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp 
b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
index 0080a389ce9cb..911494a6d69e9 100644
--- a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -79,7 +79,7 @@ static std::string validPropertyNameRegex(bool UsedInMatcher) 
{
 }
 
 static bool hasCategoryPropertyPrefix(StringRef PropertyName) {
-  auto RegexExp =
+  const auto RegexExp =
       llvm::Regex("^[a-zA-Z][a-zA-Z0-9]*_[a-zA-Z0-9][a-zA-Z0-9_]+$");
   return RegexExp.match(PropertyName);
 }
@@ -87,10 +87,10 @@ static bool hasCategoryPropertyPrefix(StringRef 
PropertyName) {
 static bool prefixedPropertyNameValid(StringRef PropertyName) {
   const size_t Start = PropertyName.find_first_of('_');
   assert(Start != StringRef::npos && Start + 1 < PropertyName.size());
-  auto Prefix = PropertyName.substr(0, Start);
+  const auto Prefix = PropertyName.substr(0, Start);
   if (Prefix.lower() != Prefix)
     return false;
-  auto RegexExp = llvm::Regex(StringRef(validPropertyNameRegex(false)));
+  const auto RegexExp = llvm::Regex(StringRef(validPropertyNameRegex(false)));
   return RegexExp.match(PropertyName.substr(Start + 1));
 }
 

diff  --git a/clang-tools-extra/clang-tidy/objc/SuperSelfCheck.cpp 
b/clang-tools-extra/clang-tidy/objc/SuperSelfCheck.cpp
index 3887afe703389..edd6f3f14464e 100644
--- a/clang-tools-extra/clang-tidy/objc/SuperSelfCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/SuperSelfCheck.cpp
@@ -85,10 +85,11 @@ void SuperSelfCheck::registerMatchers(MatchFinder *Finder) {
 void SuperSelfCheck::check(const MatchFinder::MatchResult &Result) {
   const auto *Message = Result.Nodes.getNodeAs<ObjCMessageExpr>("message");
 
-  auto Diag = diag(Message->getExprLoc(), "suspicious invocation of %0 in "
-                                          "initializer; did you mean to "
-                                          "invoke a superclass initializer?")
-              << Message->getMethodDecl();
+  const auto Diag =
+      diag(Message->getExprLoc(), "suspicious invocation of %0 in "
+                                  "initializer; did you mean to "
+                                  "invoke a superclass initializer?")
+      << Message->getMethodDecl();
 
   const SourceLocation ReceiverLoc = Message->getReceiverRange().getBegin();
   if (ReceiverLoc.isMacroID() || ReceiverLoc.isInvalid())

diff  --git a/clang-tools-extra/clang-tidy/performance/AvoidEndlCheck.cpp 
b/clang-tools-extra/clang-tidy/performance/AvoidEndlCheck.cpp
index 4433cdf5ac0db..1a075bc747923 100644
--- a/clang-tools-extra/clang-tidy/performance/AvoidEndlCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/AvoidEndlCheck.cpp
@@ -49,9 +49,9 @@ void AvoidEndlCheck::check(const MatchFinder::MatchResult 
&Result) {
         TokenRange, *Result.SourceManager, Result.Context->getLangOpts());
     if (SourceText.empty())
       SourceText = "std::endl";
-    auto Diag = diag(Expression->getBeginLoc(),
-                     "do not use '%0' with streams; use '\\n' instead")
-                << SourceText;
+    const auto Diag = diag(Expression->getBeginLoc(),
+                           "do not use '%0' with streams; use '\\n' instead")
+                      << SourceText;
     if (TokenRange.isValid())
       Diag << FixItHint::CreateReplacement(TokenRange, "'\\n'");
   } else {
@@ -65,9 +65,9 @@ void AvoidEndlCheck::check(const MatchFinder::MatchResult 
&Result) {
         *Result.SourceManager, Result.Context->getLangOpts());
     if (SourceText.empty())
       SourceText = "std::endl";
-    auto Diag = diag(CallExpression->getBeginLoc(),
-                     "do not use '%0' with streams; use '\\n' instead")
-                << SourceText;
+    const auto Diag = diag(CallExpression->getBeginLoc(),
+                           "do not use '%0' with streams; use '\\n' instead")
+                      << SourceText;
 
     const CharSourceRange ArgTokenRange = CharSourceRange::getTokenRange(
         CallExpression->getArg(0)->getSourceRange());


        
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