llvm::DbgVariable Class Reference

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

#include "CodeGen/AsmPrinter/DwarfDebug.h"

Inheritance diagram for llvm::DbgVariable:

Collaboration diagram for llvm::DbgVariable:

Public Member Functions
	DbgVariable (const DILocalVariable *V, const DILocation *IA)
	Frame index + expression. More...
void	initializeMMI (const DIExpression *E, int FI)
	Initialize from the MMI table. More...
void	initializeDbgValue (DbgValueLoc Value)
void	initializeDbgValue (const MachineInstr *DbgValue)
	Initialize from a DBG_VALUE instruction. More...
const DILocalVariable *	getVariable () const
const DIExpression *	getSingleExpression () const
void	setDebugLocListIndex (unsigned O)
unsigned	getDebugLocListIndex () const
void	setDebugLocListTagOffset (uint8_t O)
std::optional< uint8_t >	getDebugLocListTagOffset () const
StringRef	getName () const
const DbgValueLoc *	getValueLoc () const
ArrayRef< FrameIndexExpr >	getFrameIndexExprs () const
	Get the FI entries, sorted by fragment offset. More...
bool	hasFrameIndexExprs () const
void	addMMIEntry (const DbgVariable &V)
dwarf::Tag	getTag () const
bool	isArtificial () const
	Return true if DbgVariable is artificial. More...
bool	isObjectPointer () const
bool	hasComplexAddress () 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. More...
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 can be created from allocas, in which case they're generated from the MMI table. Such variables can have multiple expressions and frame indices.

Variables can be created from DBG_VALUE instructions. Those whose location changes over time use DebugLocListIndex, while those with a single location use ValueLoc and (optionally) a single entry of Expr.

Variables that have been optimized out use none of these fields.

Definition at line 115 of file DwarfDebug.h.

Constructor & Destructor Documentation

DbgVariable()

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

inline

Frame index + expression.

Construct a DbgVariable.

Creates a variable without any DW_AT_location. Call initializeMMI() for MMI entries, or initializeDbgValue() for DBG_VALUE instructions.

Definition at line 136 of file DwarfDebug.h.

Member Function Documentation

addMMIEntry()

void DbgVariable::addMMIEntry

(

const DbgVariable &

V

)

Definition at line 291 of file DwarfDebug.cpp.

References llvm::all_of(), assert(), llvm::DbgEntity::getInlinedAt(), getVariable(), llvm::none_of(), and Other.

Referenced by llvm::DwarfFile::addScopeVariable().

classof()

static bool llvm::DbgVariable::classof ( const DbgEntity *  N )

inlinestatic

Definition at line 225 of file DwarfDebug.h.

References llvm::DbgEntity::DbgVariableKind, and N.

getDebugLocListIndex()

unsigned llvm::DbgVariable::getDebugLocListIndex ( ) const

inline

Definition at line 176 of file DwarfDebug.h.

getDebugLocListTagOffset()

std::optional<uint8_t> llvm::DbgVariable::getDebugLocListTagOffset ( ) const

inline

Definition at line 178 of file DwarfDebug.h.

getFrameIndexExprs()

ArrayRef< DbgVariable::FrameIndexExpr > DbgVariable::getFrameIndexExprs

(

)

const

Get the FI entries, sorted by fragment offset.

Definition at line 273 of file DwarfDebug.cpp.

References llvm::all_of(), assert(), B, and llvm::sort().

getName()

StringRef llvm::DbgVariable::getName ( ) const

inline

Definition at line 181 of file DwarfDebug.h.

References llvm::DIVariable::getName(), and getVariable().

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

getSingleExpression()

const DIExpression* llvm::DbgVariable::getSingleExpression ( ) const

inline

Definition at line 170 of file DwarfDebug.h.

References assert().

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

getTag()

dwarf::Tag llvm::DbgVariable::getTag ( ) const

inline

Definition at line 189 of file DwarfDebug.h.

References getVariable().

getType()

const DIType * DbgVariable::getType

(

)

const

Definition at line 229 of file DwarfDebug.cpp.

References llvm::DIVariable::getType(), and getVariable().

Referenced by llvm::DwarfCompileUnit::applyVariableAttributes(), dependencies(), isArtificial(), and isObjectPointer().

getValueLoc()

const DbgValueLoc* llvm::DbgVariable::getValueLoc ( ) const

inline

Definition at line 182 of file DwarfDebug.h.

getVariable()

const DILocalVariable* llvm::DbgVariable::getVariable ( ) const

inline

Definition at line 166 of file DwarfDebug.h.

References llvm::DbgEntity::getEntity().

Referenced by addMMIEntry(), llvm::DwarfFile::addScopeVariable(), llvm::DwarfCompileUnit::applyVariableAttributes(), getName(), getTag(), getType(), initializeDbgValue(), isArtificial(), and isObjectPointer().

hasComplexAddress()

bool llvm::DbgVariable::hasComplexAddress ( ) const

inline

Definition at line 214 of file DwarfDebug.h.

References assert().

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

hasFrameIndexExprs()

bool llvm::DbgVariable::hasFrameIndexExprs ( ) const

inline

Definition at line 185 of file DwarfDebug.h.

initializeDbgValue() [1/2]

void DbgVariable::initializeDbgValue

(

const MachineInstr *

DbgValue

)

Initialize from a DBG_VALUE instruction.

Definition at line 259 of file DwarfDebug.cpp.

References assert(), E, getDebugLocValue(), llvm::DbgEntity::getInlinedAt(), and getVariable().

initializeDbgValue() [2/2]

void llvm::DbgVariable::initializeDbgValue ( DbgValueLoc  Value )

inline

Definition at line 151 of file DwarfDebug.h.

References assert(), and E.

Referenced by llvm::DebugLocStream::ListBuilder::~ListBuilder().

initializeMMI()

void llvm::DbgVariable::initializeMMI ( const DIExpression *  E, int  FI  )

inline

Initialize from the MMI table.

Definition at line 140 of file DwarfDebug.h.

References assert(), E, and llvm::max().

isArtificial()

bool llvm::DbgVariable::isArtificial ( ) const

inline

Return true if DbgVariable is artificial.

Definition at line 198 of file DwarfDebug.h.

References getType(), and getVariable().

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

isObjectPointer()

bool llvm::DbgVariable::isObjectPointer ( ) const

inline

Definition at line 206 of file DwarfDebug.h.

References getType(), and getVariable().

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

setDebugLocListIndex()

void llvm::DbgVariable::setDebugLocListIndex ( unsigned  O )

inline

Definition at line 175 of file DwarfDebug.h.

References llvm::RISCVFenceField::O.

Referenced by llvm::DebugLocStream::ListBuilder::~ListBuilder().

setDebugLocListTagOffset()

void llvm::DbgVariable::setDebugLocListTagOffset ( uint8_t  O )

inline

Definition at line 177 of file DwarfDebug.h.

References llvm::RISCVFenceField::O.

Referenced by llvm::DebugLocStream::ListBuilder::~ListBuilder().

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The documentation for this class was generated from the following files:

• lib/CodeGen/AsmPrinter/DwarfDebug.h
• lib/CodeGen/AsmPrinter/DwarfDebug.cpp