X86MCLFIRewriter.cpp File Reference

#include "X86MCLFIRewriter.h"
#include "X86BaseInfo.h"
#include "X86MCTargetDesc.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include <algorithm>
#include <optional>

Go to the source code of this file.

Functions
static bool	isPrefix (const MCInst &Inst, const MCInstrInfo &InstInfo)
static bool	isSupportedPrefix (const MCInst &Inst)
static bool	isSyscall (const MCInst &Inst)
static bool	isDirectCall (const MCInst &Inst)
static bool	isSupportedIndirectBranch (const MCInst &Inst)
static bool	isWriteSegmentBase (unsigned Opcode)
static bool	hasNoTrackPrefix (const MCInst &Inst, const MCInstrInfo &InstInfo)
static int	findFSMemOperand (const MCInst &Inst, const MCInstrInfo &InstInfo)
static bool	readsRegister (const MCInst &Inst, const MCInstrDesc &Desc, MCRegister Reg, const MCRegisterInfo &RI)
static bool	isGR64OrNone (MCRegister Reg)
static void	emitTPLoad (MCRegister Reg, MCStreamer &Out, const MCSubtargetInfo &STI)
static bool	isSandboxBaseReg (MCRegister Reg)
static bool	hasImplicitMemPointer (unsigned Opcode)
static bool	isBitTestWithRegOffset (unsigned Opcode)
static bool	ignoresMemOperand (unsigned Opcode)
static bool	hasGPRIndex (const MCInst &Inst, int MemIdx)
static bool	has32BitAddress (const MCInst &Inst, int MemIdx)
static std::optional< StringOpPointers >	getStringOpPointers (unsigned Opcode)
static void	emitStringPtrFixup (MCRegister Reg, MCRegister Reg32, MCStreamer &Out, const MCSubtargetInfo &STI)
static std::optional< unsigned >	memToRegOpcode (unsigned Opcode)
static std::optional< unsigned >	demote64BitOpcode (unsigned Opcode)
static void	emitStackFixup (MCStreamer &Out, const MCSubtargetInfo &STI)

Variables
static constexpr MCRegister	LFIBaseReg = X86::R14
static constexpr MCRegister	LFIScratchReg = X86::R11
static constexpr MCRegister	LFITPReg = X86::R15
static constexpr MCRegister	LFIBaseSeg = X86::GS
static constexpr int	TPOffset = 16

Function Documentation

demote64BitOpcode()

std::optional< unsigned > demote64BitOpcode ( unsigned Opcode )

static

Definition at line 727 of file X86MCLFIRewriter.cpp.

emitStackFixup()

void emitStackFixup ( MCStreamer & Out, const MCSubtargetInfo & STI )

static

Definition at line 781 of file X86MCLFIRewriter.cpp.

References LFIBaseReg.

emitStringPtrFixup()

void emitStringPtrFixup ( MCRegister Reg, MCRegister Reg32, MCStreamer & Out, const MCSubtargetInfo & STI )

static

Definition at line 651 of file X86MCLFIRewriter.cpp.

References LFIBaseReg, and Reg.

emitTPLoad()

void emitTPLoad ( MCRegister Reg, MCStreamer & Out, const MCSubtargetInfo & STI )

static

Definition at line 326 of file X86MCLFIRewriter.cpp.

References LFITPReg, Reg, and TPOffset.

findFSMemOperand()

int findFSMemOperand ( const MCInst & Inst, const MCInstrInfo & InstInfo )

static

Definition at line 100 of file X86MCLFIRewriter.cpp.

References llvm::X86::AddrSegmentReg, llvm::X86II::getMemoryOperandIdx(), llvm::MCInst::getOpcode(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), and llvm::MCOperand::isReg().

getStringOpPointers()

std::optional< StringOpPointers > getStringOpPointers ( unsigned Opcode )

static

Definition at line 613 of file X86MCLFIRewriter.cpp.

has32BitAddress()

bool has32BitAddress ( const MCInst & Inst, int MemIdx )

static

Definition at line 537 of file X86MCLFIRewriter.cpp.

References llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::sampleprof::Base, llvm::MCRegisterClass::contains(), llvm::MCInst::getOperand(), and llvm::MCOperand::getReg().

hasGPRIndex()

bool hasGPRIndex ( const MCInst & Inst, int MemIdx )

static

Definition at line 530 of file X86MCLFIRewriter.cpp.

References llvm::X86::AddrIndexReg, llvm::MCInst::getOperand(), and llvm::MCOperand::getReg().

hasImplicitMemPointer()

bool hasImplicitMemPointer ( unsigned Opcode )

static

Definition at line 447 of file X86MCLFIRewriter.cpp.

hasNoTrackPrefix()

bool hasNoTrackPrefix ( const MCInst & Inst, const MCInstrInfo & InstInfo )

static

Definition at line 93 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getFlags(), llvm::MCInst::getOpcode(), llvm::X86::IP_HAS_NOTRACK, and llvm::X86II::NOTRACK.

ignoresMemOperand()

bool ignoresMemOperand ( unsigned Opcode )

static

Definition at line 513 of file X86MCLFIRewriter.cpp.

isBitTestWithRegOffset()

bool isBitTestWithRegOffset ( unsigned Opcode )

static

Definition at line 483 of file X86MCLFIRewriter.cpp.

isDirectCall()

bool isDirectCall ( const MCInst & Inst )

static

Definition at line 61 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getOpcode().

isGR64OrNone()

bool isGR64OrNone ( MCRegister Reg )

static

Definition at line 125 of file X86MCLFIRewriter.cpp.

References Reg.

isPrefix()

bool isPrefix ( const MCInst & Inst, const MCInstrInfo & InstInfo )

static

Definition at line 40 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getOpcode(), and llvm::X86II::isPrefix().

isSandboxBaseReg()

bool isSandboxBaseReg ( MCRegister Reg )

static

Definition at line 440 of file X86MCLFIRewriter.cpp.

References LFIBaseReg, and Reg.

isSupportedIndirectBranch()

bool isSupportedIndirectBranch ( const MCInst & Inst )

static

Definition at line 65 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getOpcode().

isSupportedPrefix()

bool isSupportedPrefix ( const MCInst & Inst )

static

Definition at line 45 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getOpcode().

isSyscall()

bool isSyscall ( const MCInst & Inst )

static

Definition at line 57 of file X86MCLFIRewriter.cpp.

References llvm::MCInst::getOpcode().

isWriteSegmentBase()

bool isWriteSegmentBase ( unsigned Opcode )

static

Definition at line 81 of file X86MCLFIRewriter.cpp.

memToRegOpcode()

std::optional< unsigned > memToRegOpcode ( unsigned Opcode )

static

Definition at line 706 of file X86MCLFIRewriter.cpp.

readsRegister()

bool readsRegister ( const MCInst & Inst, const MCInstrDesc & Desc, MCRegister Reg, const MCRegisterInfo & RI )

static

Definition at line 111 of file X86MCLFIRewriter.cpp.

References E(), llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), I, Reg, and llvm::MCRegisterInfo::regsOverlap().

Variable Documentation

LFIBaseReg

MCRegister LFIBaseReg = X86::R14

staticconstexpr

Definition at line 29 of file X86MCLFIRewriter.cpp.

LFIBaseSeg

MCRegister LFIBaseSeg = X86::GS

staticconstexpr

Definition at line 34 of file X86MCLFIRewriter.cpp.

LFIScratchReg

MCRegister LFIScratchReg = X86::R11

staticconstexpr

Definition at line 30 of file X86MCLFIRewriter.cpp.

LFITPReg

MCRegister LFITPReg = X86::R15

staticconstexpr

Definition at line 31 of file X86MCLFIRewriter.cpp.

Referenced by emitTPLoad().

TPOffset

int TPOffset = 16

staticconstexpr

Definition at line 38 of file X86MCLFIRewriter.cpp.

Referenced by emitTPLoad().