LLVM: llvm::LoongArchAsmBackend Class Reference (original) (raw)

#include "[Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.h](LoongArchAsmBackend%5F8h%5Fsource.html)"

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
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

Definition at line 26 of file LoongArchAsmBackend.h.

◆ addReloc()

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()

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

◆ getFixupKind()

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

◆ getFixupKindInfo()

◆ getSecToAlignSym()

◆ getTargetOptions()

◆ relaxAlign()

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

◆ writeNopData()

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