class DbgVariable

Declaration

class DbgVariable : public DbgEntity { /* full declaration omitted */ };

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 \c DBG_VALUE instructions. Those whose location changes over time use \a DebugLocListIndex, while those with a single location use \a ValueLoc and (optionally) a single entry of \a Expr. Variables that have been optimized out use none of these fields.

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:115

Inherits from: DbgEntity

Member Variables

private unsigned int DebugLocListIndex = ~0U

Index of the entry list in DebugLocs.

private Optional<uint8_t> DebugLocListTagOffset

DW_OP_LLVM_tag_offset value from DebugLocs.

private std::unique_ptr<DbgValueLoc> ValueLoc = nullptr

Single value location description.

private SmallVector<llvm::DbgVariable::FrameIndexExpr, 1> FrameIndexExprs

Method Overview

• public DbgVariable(const llvm::DILocalVariable * V, const llvm::DILocation * IA)
• public void addMMIEntry(const llvm::DbgVariable & V)
• public static bool classof(const llvm::DbgEntity * N)
• public unsigned int getDebugLocListIndex() const
• public Optional<uint8_t> getDebugLocListTagOffset() const
• public ArrayRef<llvm::DbgVariable::FrameIndexExpr> getFrameIndexExprs() const
• public llvm::StringRef getName() const
• public const llvm::DIExpression * getSingleExpression() const
• public dwarf::Tag getTag() const
• public const llvm::DIType * getType() const
• public const llvm::DbgValueLoc * getValueLoc() const
• public const llvm::DILocalVariable * getVariable() const
• public bool hasComplexAddress() const
• public bool hasFrameIndexExprs() const
• public void initializeDbgValue(const llvm::MachineInstr * DbgValue)
• public void initializeDbgValue(llvm::DbgValueLoc Value)
• public void initializeMMI(const llvm::DIExpression * E, int FI)
• public bool isArtificial() const
• public bool isObjectPointer() const
• public void setDebugLocListIndex(unsigned int O)
• public void setDebugLocListTagOffset(uint8_t O)

Inherited from DbgEntity:

• public classof
• public getDIE
• public getDbgEntityID
• public getEntity
• public getInlinedAt
• public setDIE

Methods

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

Description

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

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:136

Parameters

const llvm::DILocalVariable* V

const llvm::DILocation* IA

¶void addMMIEntry(const llvm::DbgVariable& V)

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:184

Parameters

const llvm::DbgVariable& V

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

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:223

Parameters

const llvm::DbgEntity* N

¶unsigned int getDebugLocListIndex() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:176

¶Optional<uint8_t> getDebugLocListTagOffset() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:178

¶ArrayRef<llvm::DbgVariable::FrameIndexExpr>
getFrameIndexExprs() const

Description

Get the FI entries, sorted by fragment offset.

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:182

¶llvm::StringRef getName() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:179

¶const llvm::DIExpression* getSingleExpression()
    const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:170

¶dwarf::Tag getTag() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:187

¶const llvm::DIType* getType() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:221

¶const llvm::DbgValueLoc* getValueLoc() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:180

¶const llvm::DILocalVariable* getVariable() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:166

¶bool hasComplexAddress() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:212

¶bool hasFrameIndexExprs() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:183

¶void initializeDbgValue(
    const llvm::MachineInstr* DbgValue)

Description

Initialize from a DBG_VALUE instruction.

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:163

Parameters

const llvm::MachineInstr* DbgValue

¶void initializeDbgValue(llvm::DbgValueLoc Value)

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:151

Parameters

llvm::DbgValueLoc Value

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

Description

Initialize from the MMI table.

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:140

Parameters

const llvm::DIExpression* E

int FI

¶bool isArtificial() const

Description

Return true if DbgVariable is artificial.

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:196

¶bool isObjectPointer() const

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:204

¶void setDebugLocListIndex(unsigned int O)

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:175

Parameters

unsigned int O

¶void setDebugLocListTagOffset(uint8_t O)

Declared at: llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h:177

Parameters

uint8_t O