Classes
class	AvoidEndlCheck
	ClangTidyCheck Checks to flag for uses of 'std::endl' on streams and suggests using the newline character '"\n"' instead. More...
class	EnumSizeCheck
	Finds enum type definitions that could use smaller integral type as a base. More...
class	FasterStringFindCheck
	Optimize calls to std::string::find() and friends when the needle passed is a single character string literal. More...
class	ForRangeCopyCheck
	A check that detects copied loop variables and suggests using const references. More...
class	ImplicitConversionInLoopCheck
class	InefficientAlgorithmCheck
	Warns on inefficient use of STL algorithms on associative containers. More...
class	InefficientStringConcatenationCheck
	This check is to warn about the performance overhead arising from concatenating strings, using the operator+, instead of operator+=. More...
class	InefficientVectorOperationCheck
	Finds possible inefficient std::vector operations (e.g. More...
class	MoveConstArgCheck
	Find casts of calculation results to bigger type. More...
class	MoveConstructorInitCheck
	The check flags user-defined move constructors that have a ctor-initializer initializing a member or base class through a copy constructor instead of a move constructor. More...
class	NoAutomaticMoveCheck
	Finds local variables that cannot be automatically moved due to constness. More...
class	NoexceptDestructorCheck
	The check flags destructors not marked with noexcept or marked with noexcept(expr) where expr evaluates to false (but is not a false literal itself). More...
class	NoexceptFunctionBaseCheck
	Generic check which checks if the bound function decl is marked with noexcept or noexcept(expr) where expr evaluates to false. More...
class	NoexceptMoveConstructorCheck
	The check flags user-defined move constructors and assignment operators not marked with noexcept or marked with noexcept(expr) where expr evaluates to false (but is not a false literal itself). More...
class	NoexceptSwapCheck
	The check flags swap functions not marked with noexcept or marked with noexcept(expr) where expr evaluates to false (but is not a false literal itself). More...
class	NoIntToPtrCheck
	Diagnoses every integer to pointer cast. More...
class	PerformanceModule
class	TriviallyDestructibleCheck
	A check that finds classes that would be trivial if not for the defaulted destructors declared out-of-line: struct A: TrivialClass { ~A(); TrivialClass trivial_fields; }; A::~A() = default;. More...
class	TypePromotionInMathFnCheck
	Finds calls to C math library functions with implicit float to double promotions. More...
class	UnnecessaryCopyInitialization
class	UnnecessaryValueParamCheck
	A check that flags value parameters of expensive to copy types that can safely be converted to const references. More...

Functions
static bool	isReferenced (const VarDecl &LoopVar, const Stmt &Stmt, ASTContext &Context)
static bool	isNonTrivialImplicitCast (const Stmt *ST)
static bool	areTypesCompatible (QualType Left, QualType Right)
static void	replaceCallWithArg (const CallExpr *Call, DiagnosticBuilder &Diag, const SourceManager &SM, const LangOptions &LangOpts)
static bool	isRValueReferenceParam (const Expr Invocation, const QualType InvocationParmType, const Expr *Arg)
static ClangTidyModuleRegistry::Add< PerformanceModule >	X ("performance-module", "Adds performance checks.")
static void	recordFixes (const VarDecl &Var, ASTContext &Context, DiagnosticBuilder &Diagnostic)
static std::optional< SourceLocation >	firstLocAfterNewLine (SourceLocation Loc, SourceManager &SM)
static void	recordRemoval (const DeclStmt &Stmt, ASTContext &Context, DiagnosticBuilder &Diagnostic)
static bool	isInitializingVariableImmutable (const VarDecl &InitializingVar, const Stmt &BlockStmt, ASTContext &Context, const std::vector< StringRef > &ExcludedContainerTypes)
static bool	isVariableUnused (const VarDecl &Var, const Stmt &BlockStmt, ASTContext &Context)
static const SubstTemplateTypeParmType *	getSubstitutedType (const QualType &Type, ASTContext &Context)
static bool	differentReplacedTemplateParams (const QualType &VarType, const QualType &InitializerType, ASTContext &Context)
static QualType	constructorArgumentType (const VarDecl *OldVar, const BoundNodes &Nodes)
static std::string	paramNameOrIndex (StringRef Name, size_t Index)
static bool	hasLoopStmtAncestor (const DeclRefExpr &DeclRef, const Decl &Decl, ASTContext &Context)
SmallPtrSet< const DeclRefExpr *, 16 >	allDeclRefExprs (const VarDecl &VarDecl, const Stmt &Stmt, ASTContext &Context)
	Returns set of all DeclRefExprs to VarDecl within Stmt.
bool	isOnlyUsedAsConst (const VarDecl &Var, const Stmt &Stmt, ASTContext &Context, int Indirections)
	Returns true if all DeclRefExpr to the variable within Stmt do not modify it. See constReferenceDeclRefExprs for the meaning of Indirections.

Variables
static constexpr StringRef	ObjectArgId = "objectArg"
static constexpr StringRef	InitFunctionCallId = "initFunctionCall"
static constexpr StringRef	MethodDeclId = "methodDecl"
static constexpr StringRef	FunctionDeclId = "functionDecl"
static constexpr StringRef	OldVarDeclId = "oldVarDecl"

Function Documentation

◆ allDeclRefExprs()

llvm::SmallPtrSet< const DeclRefExpr *, 16 > clang::tidy::utils::decl_ref_expr::allDeclRefExprs	(	const VarDecl &	VarDecl,
		const Stmt &	Stmt,
		ASTContext &	Context )

Returns set of all DeclRefExprs to VarDecl within Stmt.

Definition at line 375 of file DeclRefExprUtils.cpp.

Referenced by isVariableUnused().

◆ areTypesCompatible()

bool clang::tidy::performance::areTypesCompatible	(	QualType	Left,
		QualType	Right )

static

Definition at line 18 of file InefficientAlgorithmCheck.cpp.

Referenced by clang::tidy::performance::InefficientAlgorithmCheck::check().

◆ constructorArgumentType()

QualType clang::tidy::performance::constructorArgumentType	(	const VarDecl *	OldVar,
		const BoundNodes &	Nodes )

static

Definition at line 218 of file UnnecessaryCopyInitialization.cpp.

References FuncDecl, FunctionDeclId, and MethodDeclId.

Referenced by clang::tidy::performance::UnnecessaryCopyInitialization::check().

◆ differentReplacedTemplateParams()

bool clang::tidy::performance::differentReplacedTemplateParams	(	const QualType &	VarType,
		const QualType &	InitializerType,
		ASTContext &	Context )

static

Definition at line 200 of file UnnecessaryCopyInitialization.cpp.

References getSubstitutedType().

Referenced by clang::tidy::performance::UnnecessaryCopyInitialization::check().

◆ firstLocAfterNewLine()

std::optional< SourceLocation > clang::tidy::performance::firstLocAfterNewLine	(	SourceLocation	Loc,
		SourceManager &	SM )

static

Definition at line 42 of file UnnecessaryCopyInitialization.cpp.

Referenced by recordRemoval().

◆ getSubstitutedType()

const SubstTemplateTypeParmType * clang::tidy::performance::getSubstitutedType	(	const QualType &	Type,
		ASTContext &	Context )

static

Definition at line 192 of file UnnecessaryCopyInitialization.cpp.

Referenced by differentReplacedTemplateParams().

◆ hasLoopStmtAncestor()

bool clang::tidy::performance::hasLoopStmtAncestor	(	const DeclRefExpr &	DeclRef,
		const Decl &	Decl,
		ASTContext &	Context )

static

Definition at line 30 of file UnnecessaryValueParamCheck.cpp.

Referenced by clang::tidy::performance::UnnecessaryValueParamCheck::check().

◆ isInitializingVariableImmutable()

bool clang::tidy::performance::isInitializingVariableImmutable	(	const VarDecl &	InitializingVar,
		const Stmt &	BlockStmt,
		ASTContext &	Context,
		const std::vector< StringRef > &	ExcludedContainerTypes )

static

Definition at line 148 of file UnnecessaryCopyInitialization.cpp.

References InitFunctionCallId, isInitializingVariableImmutable(), isOnlyUsedAsConst(), ObjectArgId, and OldVarDeclId.

Referenced by isInitializingVariableImmutable().

◆ isNonTrivialImplicitCast()

bool clang::tidy::performance::isNonTrivialImplicitCast ( const Stmt * ST )

static

Definition at line 25 of file ImplicitConversionInLoopCheck.cpp.

References isNonTrivialImplicitCast().

Referenced by clang::tidy::performance::ImplicitConversionInLoopCheck::check(), and isNonTrivialImplicitCast().

◆ isOnlyUsedAsConst()

bool clang::tidy::utils::decl_ref_expr::isOnlyUsedAsConst	(	const VarDecl &	Var,
		const Stmt &	Stmt,
		ASTContext &	Context,
		int	Indirections )

Returns true if all DeclRefExpr to the variable within Stmt do not modify it. See constReferenceDeclRefExprs for the meaning of Indirections.

Definition at line 361 of file DeclRefExprUtils.cpp.

Referenced by clang::tidy::performance::UnnecessaryCopyInitialization::check(), and isInitializingVariableImmutable().

◆ isReferenced()

bool clang::tidy::performance::isReferenced	(	const VarDecl &	LoopVar,
		const Stmt &	Stmt,
		ASTContext &	Context )

static

Definition at line 99 of file ForRangeCopyCheck.cpp.

◆ isRValueReferenceParam()

bool clang::tidy::performance::isRValueReferenceParam	(	const Expr *	Invocation,
		const QualType *	InvocationParmType,
		const Expr *	Arg )

static

Definition at line 81 of file MoveConstArgCheck.cpp.

Referenced by clang::tidy::performance::MoveConstArgCheck::check().

◆ isVariableUnused()

bool clang::tidy::performance::isVariableUnused	(	const VarDecl &	Var,
		const Stmt &	BlockStmt,
		ASTContext &	Context )

static

Definition at line 186 of file UnnecessaryCopyInitialization.cpp.

References allDeclRefExprs().

Referenced by clang::tidy::performance::UnnecessaryCopyInitialization::check().

◆ paramNameOrIndex()

std::string clang::tidy::performance::paramNameOrIndex	(	StringRef	Name,
		size_t	Index )

static

Definition at line 24 of file UnnecessaryValueParamCheck.cpp.

Referenced by clang::tidy::performance::UnnecessaryValueParamCheck::handleConstRefFix().

◆ recordFixes()

void clang::tidy::performance::recordFixes	(	const VarDecl &	Var,
		ASTContext &	Context,
		DiagnosticBuilder &	Diagnostic )

static

Definition at line 32 of file UnnecessaryCopyInitialization.cpp.

References clang::tidy::utils::fixit::addQualifierToVarDecl(), clang::tidy::utils::fixit::changeVarDeclToReference(), and Fix().

◆ recordRemoval()

void clang::tidy::performance::recordRemoval	(	const DeclStmt &	Stmt,
		ASTContext &	Context,
		DiagnosticBuilder &	Diagnostic )

static

Definition at line 53 of file UnnecessaryCopyInitialization.cpp.

References clang::tidy::utils::lexer::findNextTokenSkippingComments(), and firstLocAfterNewLine().

◆ replaceCallWithArg()

void clang::tidy::performance::replaceCallWithArg	(	const CallExpr *	Call,
		DiagnosticBuilder &	Diag,
		const SourceManager &	SM,
		const LangOptions &	LangOpts )