LLVM  3.7.0
Public Member Functions | List of all members
llvm::MipsAsmBackend Class Reference

#include <MipsAsmBackend.h>

Inheritance diagram for llvm::MipsAsmBackend:
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Collaboration diagram for llvm::MipsAsmBackend:
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Public Member Functions

 MipsAsmBackend (const Target &T, Triple::OSType OSType, bool IsLittle, bool Is64Bit)
 
MCObjectWritercreateObjectWriter (raw_pwrite_stream &OS) const override
 Create a new MCObjectWriter instance for use by the assembler backend to emit the final object file. More...
 
void applyFixup (const MCFixup &Fixup, char *Data, unsigned DataSize, uint64_t Value, bool IsPCRel) const override
 ApplyFixup - Apply the Value for given Fixup into the provided data fragment, at the offset specified by the fixup and following the fixup kind as appropriate. More...
 
const MCFixupKindInfogetFixupKindInfo (MCFixupKind Kind) const override
 Get information on a fixup kind. More...
 
unsigned getNumFixupKinds () const override
 Get the number of target specific fixup kinds. More...
 
bool writeNopData (uint64_t Count, MCObjectWriter *OW) const override
 WriteNopData - Write an (optimal) nop sequence of Count bytes to the given output. More...
 
void processFixupValue (const MCAssembler &Asm, const MCAsmLayout &Layout, const MCFixup &Fixup, const MCFragment *DF, const MCValue &Target, uint64_t &Value, bool &IsResolved) override
 processFixupValue - Target hook to process the literal value of a fixup if necessary. More...
 
Target Relaxation Interfaces
bool mayNeedRelaxation (const MCInst &Inst) const override
 MayNeedRelaxation - Check whether the given instruction may need relaxation. More...
 
bool fixupNeedsRelaxation (const MCFixup &Fixup, uint64_t Value, const MCRelaxableFragment *DF, const MCAsmLayout &Layout) const override
 fixupNeedsRelaxation - Target specific predicate for whether a given fixup requires the associated instruction to be relaxed. More...
 
void relaxInstruction (const MCInst &Inst, MCInst &Res) const override
 RelaxInstruction - Relax the instruction in the given fragment to the next wider instruction. More...
 
- Public Member Functions inherited from llvm::MCAsmBackend
virtual ~MCAsmBackend ()
 
virtual void reset ()
 lifetime management More...
 
virtual MCELFObjectTargetWritercreateELFObjectTargetWriter () const
 Create a new ELFObjectTargetWriter to enable non-standard ELFObjectWriters. More...
 
bool hasDataInCodeSupport () const
 Check whether this target implements data-in-code markers. More...
 
virtual unsigned getMinimumNopSize () const
 Returns the minimum size of a nop in bytes on this target. More...
 
virtual void handleAssemblerFlag (MCAssemblerFlag Flag)
 Handle any target-specific assembler flags. By default, do nothing. More...
 
virtual uint32_t generateCompactUnwindEncoding (ArrayRef< MCCFIInstruction >) const
 Generate the compact unwind encoding for the CFI instructions. More...
 
virtual bool fixupNeedsRelaxationAdvanced (const MCFixup &Fixup, bool Resolved, uint64_t Value, const MCRelaxableFragment *DF, const MCAsmLayout &Layout) const
 Target specific predicate for whether a given fixup requires the associated instruction to be relaxed. More...
 

Additional Inherited Members

- Protected Member Functions inherited from llvm::MCAsmBackend
 MCAsmBackend ()
 
- Protected Attributes inherited from llvm::MCAsmBackend
unsigned HasDataInCodeSupport: 1
 

Detailed Description

Definition at line 29 of file MipsAsmBackend.h.

Constructor & Destructor Documentation

llvm::MipsAsmBackend::MipsAsmBackend ( const Target T,
Triple::OSType  OSType,
bool  IsLittle,
bool  Is64Bit 
)
inline

Definition at line 35 of file MipsAsmBackend.h.

Member Function Documentation

void MipsAsmBackend::applyFixup ( const MCFixup Fixup,
char *  Data,
unsigned  DataSize,
uint64_t  Value,
bool  IsPCRel 
) const
overridevirtual

ApplyFixup - Apply the Value for given Fixup into the provided data fragment, at the offset specified by the fixup and following the fixup kind as appropriate.

Implements llvm::MCAsmBackend.

Definition at line 178 of file MipsAsmBackend.cpp.

References adjustFixupValue(), calculateMMLEIndex(), llvm::Mips::fixup_MICROMIPS_PC10_S1, llvm::Mips::fixup_Mips_16, llvm::Mips::fixup_Mips_64, llvm::FK_Data_2, llvm::FK_Data_4, llvm::FK_Data_8, getFixupKindInfo(), llvm::MCFixup::getKind(), llvm::MCFixup::getOffset(), Kind, needsMMLEByteOrder(), and llvm::MCFixupKindInfo::TargetSize.

MCObjectWriter * MipsAsmBackend::createObjectWriter ( raw_pwrite_stream OS) const
overridevirtual

Create a new MCObjectWriter instance for use by the assembler backend to emit the final object file.

Implements llvm::MCAsmBackend.

Definition at line 153 of file MipsAsmBackend.cpp.

References llvm::createMipsELFObjectWriter(), and llvm::MCELFObjectTargetWriter::getOSABI().

bool llvm::MipsAsmBackend::fixupNeedsRelaxation ( const MCFixup Fixup,
uint64_t  Value,
const MCRelaxableFragment DF,
const MCAsmLayout Layout 
) const
inlineoverridevirtual

fixupNeedsRelaxation - Target specific predicate for whether a given fixup requires the associated instruction to be relaxed.

Implements llvm::MCAsmBackend.

Definition at line 63 of file MipsAsmBackend.h.

References llvm_unreachable.

const MCFixupKindInfo & MipsAsmBackend::getFixupKindInfo ( MCFixupKind  Kind) const
overridevirtual
unsigned llvm::MipsAsmBackend::getNumFixupKinds ( ) const
inlineoverridevirtual

Get the number of target specific fixup kinds.

Implements llvm::MCAsmBackend.

Definition at line 46 of file MipsAsmBackend.h.

References llvm::Mips::NumTargetFixupKinds.

Referenced by getFixupKindInfo().

bool llvm::MipsAsmBackend::mayNeedRelaxation ( const MCInst Inst) const
inlineoverridevirtual

MayNeedRelaxation - Check whether the given instruction may need relaxation.

Parameters
Inst- The instruction to test.

Implements llvm::MCAsmBackend.

Definition at line 57 of file MipsAsmBackend.h.

void MipsAsmBackend::processFixupValue ( const MCAssembler Asm,
const MCAsmLayout Layout,
const MCFixup Fixup,
const MCFragment DF,
const MCValue Target,
uint64_t &  Value,
bool IsResolved 
)
overridevirtual

processFixupValue - Target hook to process the literal value of a fixup if necessary.

Reimplemented from llvm::MCAsmBackend.

Definition at line 397 of file MipsAsmBackend.cpp.

References adjustFixupValue(), and llvm::MCAssembler::getContext().

void llvm::MipsAsmBackend::relaxInstruction ( const MCInst Inst,
MCInst Res 
) const
inlineoverridevirtual

RelaxInstruction - Relax the instruction in the given fragment to the next wider instruction.

Parameters
Inst- The instruction to relax, which may be the same as the output.
[out]ResOn return, the relaxed instruction.

Implements llvm::MCAsmBackend.

Definition at line 77 of file MipsAsmBackend.h.

bool MipsAsmBackend::writeNopData ( uint64_t  Count,
MCObjectWriter OW 
) const
overridevirtual

WriteNopData - 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 383 of file MipsAsmBackend.cpp.

References llvm::MCObjectWriter::WriteZeros().


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