This class is used to track local variable information. More...

#include "CodeGen/AsmPrinter/DwarfDebug.h"

Inheritance diagram for llvm::DbgVariable:

Public Member Functions
Loc::Variant &	asVariant ()
	To workaround P2162R0 https://github.com/cplusplus/papers/issues/873 the base class subobject needs to be passed directly to std::visit, so expose it directly here.

const Loc::Variant &	asVariant () const

template<typename T >
bool	holds () const
	Member shorthand for std::holds_alternative.

template<typename T >
auto &	get () noexcept
	Asserting, noexcept member alternative to std::get.

template<typename T >
const auto &	get () const noexcept
	Asserting, noexcept member alternative to std::get.

	DbgVariable (const DILocalVariable V, const DILocation IA)
	Construct a DbgVariable.

const DILocalVariable *	getVariable () const

StringRef	getName () const

dwarf::Tag	getTag () const

bool	isArtificial () const
	Return true if DbgVariable is artificial.

bool	isObjectPointer () const

const DIType *	getType () const

Public Member Functions inherited from llvm::DbgEntity
	DbgEntity (const DINode N, const DILocation IA, DbgEntityKind ID)

virtual	~DbgEntity ()=default

void	setDIE (DIE &D)

const DINode *	getEntity () const
	Accessors.

const DILocation *	getInlinedAt () const

DIE *	getDIE () const

DbgEntityKind	getDbgEntityID () const

Static Public Member Functions
static bool	classof (const DbgEntity *N)

Static Public Member Functions inherited from llvm::DbgEntity
static bool	classof (const DbgEntity *N)

Additional Inherited Members
Public Types inherited from llvm::DbgEntity
enum	DbgEntityKind { DbgVariableKind , DbgLabelKind }

Detailed Description

This class is used to track local variable information.

Variables that have been optimized out hold the monostate alternative. This is not distinguished from the case of a constructed DbgVariable which has not be initialized yet.

Variables can be created from allocas, in which case they're generated from the MMI table. Such variables hold the Loc::MMI alternative which can have multiple expressions and frame indices.

Variables can be created from the entry value of registers, in which case they're generated from the MMI table. Such variables hold the EntryValueLoc alternative which can either have a single expression or multiple fragment expressions.

Variables can be created from DBG_VALUE instructions. Those whose location changes over time hold a Loc::Multi alternative which uses DebugLocListIndex and (optionally) DebugLocListTagOffset, while those with a single location hold a Loc::Single alternative which use ValueLoc and (optionally) a single Expr.

Definition at line 215 of file DwarfDebug.h.

Constructor & Destructor Documentation

◆ DbgVariable()

llvm::DbgVariable::DbgVariable	(	const DILocalVariable *	V,
		const DILocation *	IA
	)

inline

Construct a DbgVariable.

Creates a variable without any DW_AT_location.

Definition at line 243 of file DwarfDebug.h.

Member Function Documentation

◆ asVariant() [1/2]

Loc::Variant & llvm::DbgVariable::asVariant ( )

inline

To workaround P2162R0 https://github.com/cplusplus/papers/issues/873 the base class subobject needs to be passed directly to std::visit, so expose it directly here.

Definition at line 221 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::constructVariableDIE().