#include "Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.h"

Inheritance diagram for llvm::LoongArchAsmBackend:

Public Member Functions
	LoongArchAsmBackend (const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit, const MCTargetOptions &Options)
bool	addReloc (const MCFragment &, const MCFixup &, const MCValue &, uint64_t &FixedValue, bool IsResolved)
void	applyFixup (const MCFragment &, const MCFixup &, const MCValue &Target, uint8_t *Data, uint64_t Value, bool IsResolved) override
std::optional< MCFixupKind >	getFixupKind (StringRef Name) const override
	Map a relocation name used in .reloc to a fixup kind.
MCFixupKindInfo	getFixupKindInfo (MCFixupKind Kind) const override
	Get information on a fixup kind.
bool	relaxAlign (MCFragment &F, unsigned &Size) override
bool	relaxDwarfLineAddr (MCFragment &) const override
bool	relaxDwarfCFA (MCFragment &) const override
std::pair< bool, bool >	relaxLEB128 (MCFragment &F, int64_t &Value) const override
bool	writeNopData (raw_ostream &OS, uint64_t Count, const MCSubtargetInfo *STI) const override
	Write an (optimal) nop sequence of Count bytes to the given output.
std::unique_ptr< MCObjectTargetWriter >	createObjectTargetWriter () const override
const MCTargetOptions &	getTargetOptions () const
DenseMap< MCSection , const MCSymbolRefExpr > &	getSecToAlignSym ()
Public Member Functions inherited from llvm::MCAsmBackend
	MCAsmBackend (const MCAsmBackend &)=delete
MCAsmBackend &	operator= (const MCAsmBackend &)=delete
virtual	~MCAsmBackend ()
void	setAssembler (MCAssembler *A)
MCContext &	getContext () const
bool	allowAutoPadding () const
	Return true if this target might automatically pad instructions and thus need to emit padding enable/disable directives around sensative code.
bool	allowEnhancedRelaxation () const
	Return true if this target allows an unrelaxable instruction to be emitted into RelaxableFragment and then we can increase its size in a tricky way for optimization.
virtual void	reset ()
	lifetime management
std::unique_ptr< MCObjectWriter >	createObjectWriter (raw_pwrite_stream &OS) const
	Create a new MCObjectWriter instance for use by the assembler backend to emit the final object file.
std::unique_ptr< MCObjectWriter >	createDwoObjectWriter (raw_pwrite_stream &OS, raw_pwrite_stream &DwoOS) const
	Create an MCObjectWriter that writes two object files: a .o file which is linked into the final program and a .dwo file which is used by debuggers.
virtual unsigned	getMinimumNopSize () const
	Returns the minimum size of a nop in bytes on this target.
virtual unsigned	getMaximumNopSize (const MCSubtargetInfo &STI) const
	Returns the maximum size of a nop in bytes on this target.
virtual bool	finishLayout (const MCAssembler &Asm) const
virtual uint64_t	generateCompactUnwindEncoding (const MCDwarfFrameInfo FI, const MCContext Ctxt) const
	Generate the compact unwind encoding for the CFI instructions.
bool	isDarwinCanonicalPersonality (const MCSymbol *Sym) const
virtual std::optional< bool >	evaluateFixup (const MCFragment &, MCFixup &, MCValue &, uint64_t &)
void	maybeAddReloc (const MCFragment &, const MCFixup &, const MCValue &, uint64_t &Value, bool IsResolved)
virtual bool	mayNeedRelaxation (unsigned Opcode, ArrayRef< MCOperand > Operands, const MCSubtargetInfo &STI) const
	Check whether the given instruction (encoded as Opcode+Operands) may need relaxation.
virtual bool	fixupNeedsRelaxationAdvanced (const MCFragment &, const MCFixup &, const MCValue &, uint64_t, bool Resolved) const
	Target specific predicate for whether a given fixup requires the associated instruction to be relaxed.
virtual bool	fixupNeedsRelaxation (const MCFixup &Fixup, uint64_t Value) const
	Simple predicate for targets where !Resolved implies requiring relaxation.
virtual void	relaxInstruction (MCInst &Inst, const MCSubtargetInfo &STI) const
	Relax the instruction in the given fragment to the next wider instruction.
virtual bool	relaxSFrameCFA (MCFragment &) const

Additional Inherited Members
Static Public Member Functions inherited from llvm::MCAsmBackend
static const MCSubtargetInfo *	getSubtargetInfo (const MCFragment &F)
Public Attributes inherited from llvm::MCAsmBackend
const llvm::endianness	Endian
Protected Member Functions inherited from llvm::MCAsmBackend
	MCAsmBackend (llvm::endianness Endian)
Protected Attributes inherited from llvm::MCAsmBackend
MCAssembler *	Asm = nullptr
bool	AllowAutoPadding = false
bool	AllowEnhancedRelaxation = false

Detailed Description

Definition at line 26 of file LoongArchAsmBackend.h.

Constructor & Destructor Documentation

◆ LoongArchAsmBackend()

LoongArchAsmBackend::LoongArchAsmBackend	(	const MCSubtargetInfo &	STI,
		uint8_t	OSABI,
		bool	Is64Bit,
		const MCTargetOptions &	Options )

Definition at line 31 of file LoongArchAsmBackend.cpp.

References llvm::little, llvm::MCAsmBackend::MCAsmBackend(), and Options.

Member Function Documentation

◆ addReloc()

bool LoongArchAsmBackend::addReloc	(	const MCFragment &	F,
		const MCFixup &	Fixup,
		const MCValue &	Target,
		uint64_t &	FixedValue,
		bool	IsResolved )

Definition at line 399 of file LoongArchAsmBackend.cpp.

References A(), llvm::MCAsmBackend::Asm, assert(), B(), llvm::MCFixup::create(), F, Fallback, Fixup, llvm::FK_Data_1, llvm::FK_Data_2, llvm::FK_Data_4, llvm::FK_Data_8, llvm::FK_Data_leb128, llvm::MCValue::get(), getRelocPairForSize(), llvm::MCSymbol::getSection(), llvm::MCSymbol::isInSection(), llvm::MCSection::isLinkerRelaxable(), llvm_unreachable, and llvm::MCAsmBackend::maybeAddReloc().

Referenced by applyFixup().

◆ applyFixup()

void LoongArchAsmBackend::applyFixup	(	const MCFragment &	F,
		const MCFixup &	Fixup,
		const MCValue &	Target,
		uint8_t *	Data,
		uint64_t	Value,
		bool	IsResolved )

overridevirtual

Implements llvm::MCAsmBackend.

Definition at line 143 of file LoongArchAsmBackend.cpp.

References addReloc(), adjustFixupValue(), llvm::alignTo(), assert(), llvm::Data, F, Fixup, fixupLeb128(), llvm::FK_Data_leb128, llvm::MCAsmBackend::getContext(), getFixupKindInfo(), I, and llvm::mc::isRelocation().

◆ createObjectTargetWriter()

std::unique_ptr< MCObjectTargetWriter > LoongArchAsmBackend::createObjectTargetWriter ( ) const

overridevirtual

Implements llvm::MCAsmBackend.

Definition at line 488 of file LoongArchAsmBackend.cpp.

References llvm::createLoongArchELFObjectWriter().

◆ getFixupKind()

std::optional< MCFixupKind > LoongArchAsmBackend::getFixupKind ( StringRef Name ) const

overridevirtual

Map a relocation name used in .reloc to a fixup kind.

Reimplemented from llvm::MCAsmBackend.

Definition at line 38 of file LoongArchAsmBackend.cpp.

References llvm::StringSwitch< T, R >::Case(), llvm::StringSwitch< T, R >::Default(), and llvm::FirstLiteralRelocationKind.

◆ getFixupKindInfo()

MCFixupKindInfo LoongArchAsmBackend::getFixupKindInfo ( MCFixupKind Kind ) const

overridevirtual

Get information on a fixup kind.

Reimplemented from llvm::MCAsmBackend.

Definition at line 54 of file LoongArchAsmBackend.cpp.

References assert(), llvm::FirstTargetFixupKind, llvm::MCAsmBackend::getFixupKindInfo(), llvm::mc::isRelocation(), and llvm::LoongArch::NumTargetFixupKinds.

Referenced by applyFixup().

◆ getSecToAlignSym()

DenseMap< MCSection *, const MCSymbolRefExpr * > & llvm::LoongArchAsmBackend::getSecToAlignSym ( )

inline

Definition at line 63 of file LoongArchAsmBackend.h.

Referenced by relaxAlign().

◆ getTargetOptions()

const MCTargetOptions & llvm::LoongArchAsmBackend::getTargetOptions ( ) const

inline

Definition at line 62 of file LoongArchAsmBackend.h.

◆ relaxAlign()

bool LoongArchAsmBackend::relaxAlign	(	MCFragment &	F,
		unsigned &	Size )

overridevirtual

Reimplemented from llvm::MCAsmBackend.

Definition at line 202 of file LoongArchAsmBackend.cpp.

References llvm::MCAsmBackend::Asm, llvm::MCConstantExpr::create(), llvm::MCFixup::create(), llvm::MCSymbolRefExpr::create(), llvm::MCBinaryExpr::createAdd(), F, llvm::FirstLiteralRelocationKind, Fixup, llvm::MCSection::getBeginSymbol(), llvm::MCAsmBackend::getContext(), llvm::MCSymbol::getFragment(), getSecToAlignSym(), llvm::Log2(), llvm::MCSymbol::setFragment(), and Size.

◆ relaxDwarfCFA()

bool LoongArchAsmBackend::relaxDwarfCFA ( MCFragment & F ) const

overridevirtual

Reimplemented from llvm::MCAsmBackend.

Definition at line 314 of file LoongArchAsmBackend.cpp.

References llvm::MCAsmBackend::Asm, assert(), llvm::cast(), llvm::MCFixup::create(), llvm::Data, llvm::MCExpr::evaluateKnownAbsolute(), F, llvm::MCAsmBackend::getContext(), llvm::MCBinaryExpr::getLHS(), getRelocPairForSize(), llvm::MCBinaryExpr::getRHS(), llvm::isUInt(), llvm::isUIntN(), llvm::little, llvm_unreachable, llvm::Offset, and llvm::support::endian::write().

◆ relaxDwarfLineAddr()

bool LoongArchAsmBackend::relaxDwarfLineAddr ( MCFragment & F ) const

overridevirtual

Reimplemented from llvm::MCAsmBackend.

Definition at line 262 of file LoongArchAsmBackend.cpp.

References llvm::MCAsmBackend::Asm, assert(), llvm::CallingConv::C, llvm::MCFixup::create(), llvm::Data, llvm::encodeSLEB128(), llvm::MCExpr::evaluateKnownAbsolute(), F, llvm::MCAsmBackend::getContext(), llvm::MCFixup::getDataKindForSize(), INT64_MAX, llvm::little, llvm::Offset, llvm::raw_ostream::tell(), llvm::support::endian::write(), and llvm::raw_ostream::write_zeros().

◆ relaxLEB128()

std::pair< bool, bool > LoongArchAsmBackend::relaxLEB128	(	MCFragment &	F,
		int64_t &	Value ) const

overridevirtual

Reimplemented from llvm::MCAsmBackend.

Definition at line 253 of file LoongArchAsmBackend.cpp.

References llvm::MCAsmBackend::Asm, llvm::MCFixup::create(), llvm::MCExpr::evaluateKnownAbsolute(), F, and llvm::FK_Data_leb128.

◆ writeNopData()

bool LoongArchAsmBackend::writeNopData	(	raw_ostream &	OS,
		uint64_t	Count,
		const MCSubtargetInfo *	STI ) const

overridevirtual

Write an (optimal) nop sequence of Count bytes to the given output.

If the target cannot generate such a sequence, it should return an error.

Returns: - True on success.

Implements llvm::MCAsmBackend.

Definition at line 365 of file LoongArchAsmBackend.cpp.

References llvm::Count, llvm::raw_ostream::write(), and llvm::raw_ostream::write_zeros().

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

lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.h
lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ LoongArchAsmBackend()

Member Function Documentation

◆ addReloc()

◆ applyFixup()

◆ createObjectTargetWriter()

◆ getFixupKind()

◆ getFixupKindInfo()

◆ getSecToAlignSym()

◆ getTargetOptions()

◆ relaxAlign()

◆ relaxDwarfCFA()

◆ relaxDwarfLineAddr()

◆ relaxLEB128()

◆ writeNopData()