X86AsmBackend.cpp File Reference

#include "MCTargetDesc/X86BaseInfo.h"
#include "MCTargetDesc/X86EncodingOptimization.h"
#include "MCTargetDesc/X86FixupKinds.h"
#include "MCTargetDesc/X86MCAsmInfo.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCELFStreamer.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/MCValue.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/BinaryFormat/ELFRelocs/x86_64.def"
#include "llvm/BinaryFormat/ELFRelocs/i386.def"

Go to the source code of this file.

Namespaces
namespace	CU

Macros
#define	ELF_RELOC(X, Y)
#define	ELF_RELOC(X, Y)

Functions
static bool	isRelaxableBranch (unsigned Opcode)
static unsigned	getRelaxedOpcodeBranch (unsigned Opcode, bool Is16BitMode=false)
static unsigned	getRelaxedOpcode (const MCInst &MI, bool Is16BitMode)
static X86::CondCode	getCondFromBranch (const MCInst &MI, const MCInstrInfo &MCII)
static X86::SecondMacroFusionInstKind	classifySecondInstInMacroFusion (const MCInst &MI, const MCInstrInfo &MCII)
static bool	isRIPRelative (const MCInst &MI, const MCInstrInfo &MCII)
	Check if the instruction uses RIP relative addressing.
static bool	isPrefix (unsigned Opcode, const MCInstrInfo &MCII)
	Check if the instruction is a prefix.
static bool	isFirstMacroFusibleInst (const MCInst &Inst, const MCInstrInfo &MCII)
	Check if the instruction is valid as the first instruction in macro fusion.
static bool	hasVariantSymbol (const MCInst &MI)
	Check if the instruction has a variant symbol operand.
static bool	mayHaveInterruptDelaySlot (unsigned InstOpcode)
	X86 has certain instructions which enable interrupts exactly one instruction after the instruction which stores to SS.
static unsigned	getFixupKindSize (unsigned Kind)

Variables
constexpr char	GotSymName [] = "_GLOBAL_OFFSET_TABLE_"

Macro Definition Documentation

ELF_RELOC [1/2]

#define ELF_RELOC	(		X,
			Y )

Value:

.Case(#X, Y)

ELF_RELOC [2/2]

#define ELF_RELOC	(		X,
			Y )

Value:

.Case(#X, Y)

Function Documentation

classifySecondInstInMacroFusion()

X86::SecondMacroFusionInstKind classifySecondInstInMacroFusion ( const MCInst & MI, const MCInstrInfo & MCII )

static

Definition at line 252 of file X86AsmBackend.cpp.

References getCondFromBranch(), and MI.

getCondFromBranch()

X86::CondCode getCondFromBranch ( const MCInst & MI, const MCInstrInfo & MCII )

static

Definition at line 237 of file X86AsmBackend.cpp.

References llvm::X86::COND_INVALID, llvm::MCInstrInfo::get(), and MI.

Referenced by classifySecondInstInMacroFusion().

getFixupKindSize()

unsigned getFixupKindSize ( unsigned Kind )

static

Definition at line 630 of file X86AsmBackend.cpp.

References llvm::FK_Data_1, llvm::FK_Data_2, llvm::FK_Data_4, llvm::FK_Data_8, llvm::FK_NONE, llvm::FK_SecRel_1, llvm::FK_SecRel_2, llvm::FK_SecRel_4, llvm::FK_SecRel_8, llvm_unreachable, llvm::X86::reloc_branch_4byte_pcrel, llvm::X86::reloc_global_offset_table, llvm::X86::reloc_riprel_4byte, llvm::X86::reloc_riprel_4byte_movq_load, llvm::X86::reloc_riprel_4byte_movq_load_rex2, llvm::X86::reloc_riprel_4byte_relax, llvm::X86::reloc_riprel_4byte_relax_evex, llvm::X86::reloc_riprel_4byte_relax_rex, llvm::X86::reloc_riprel_4byte_relax_rex2, llvm::X86::reloc_signed_4byte, and llvm::X86::reloc_signed_4byte_relax.

getRelaxedOpcode()

unsigned getRelaxedOpcode ( const MCInst & MI, bool Is16BitMode )

static

Definition at line 231 of file X86AsmBackend.cpp.

References llvm::X86::getOpcodeForLongImmediateForm(), getRelaxedOpcodeBranch(), isRelaxableBranch(), and MI.

getRelaxedOpcodeBranch()

unsigned getRelaxedOpcodeBranch ( unsigned Opcode, bool Is16BitMode = false )

static

Definition at line 219 of file X86AsmBackend.cpp.

References llvm_unreachable.

Referenced by getRelaxedOpcode().

hasVariantSymbol()

bool hasVariantSymbol ( const MCInst & MI )

static

Check if the instruction has a variant symbol operand.

Definition at line 365 of file X86AsmBackend.cpp.

References llvm::cast(), llvm::MCExpr::getKind(), MI, and llvm::MCExpr::SymbolRef.

isFirstMacroFusibleInst()

bool isFirstMacroFusibleInst ( const MCInst & Inst, const MCInstrInfo & MCII )

static

Check if the instruction is valid as the first instruction in macro fusion.

Definition at line 277 of file X86AsmBackend.cpp.

References llvm::X86::classifyFirstOpcodeInMacroFusion(), llvm::MCInst::getOpcode(), llvm::X86::Invalid, and isRIPRelative().

isPrefix()

bool isPrefix ( unsigned Opcode, const MCInstrInfo & MCII )

static

Check if the instruction is a prefix.

Definition at line 272 of file X86AsmBackend.cpp.

References llvm::MCInstrInfo::get(), llvm::X86II::isPrefix(), and llvm::MCInstrDesc::TSFlags.

Referenced by readPrefixes().

isRelaxableBranch()

bool isRelaxableBranch ( unsigned Opcode )

static

Definition at line 215 of file X86AsmBackend.cpp.

Referenced by getRelaxedOpcode().

isRIPRelative()

bool isRIPRelative ( const MCInst & MI, const MCInstrInfo & MCII )

static

Check if the instruction uses RIP relative addressing.

Definition at line 258 of file X86AsmBackend.cpp.

References llvm::X86::AddrBaseReg, llvm::MCInstrInfo::get(), llvm::X86II::getMemoryOperandNo(), llvm::X86II::getOperandBias(), and MI.

Referenced by isFirstMacroFusibleInst().

mayHaveInterruptDelaySlot()

bool mayHaveInterruptDelaySlot ( unsigned InstOpcode )

static

X86 has certain instructions which enable interrupts exactly one instruction after the instruction which stores to SS.

Return true if the given instruction may have such an interrupt delay slot.

Definition at line 380 of file X86AsmBackend.cpp.

Variable Documentation

GotSymName

char GotSymName[] = "_GLOBAL_OFFSET_TABLE_"

constexpr

Definition at line 662 of file X86AsmBackend.cpp.