X86InstrInfo.cpp File Reference

#include "X86InstrInfo.h"
#include "X86.h"
#include "X86GenInstrInfo.inc"
#include "X86InstrBuilder.h"
#include "X86MachineFunctionInfo.h"
#include "X86Subtarget.h"
#include "X86TargetMachine.h"
#include "llvm/DerivedTypes.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetAsmInfo.h"

Include dependency graph for X86InstrInfo.cpp:

Go to the source code of this file.

Functions
static bool	regIsPICBase (unsigned BaseReg, const MachineRegisterInfo &MRI)
static bool	isGVStub (GlobalValue *GV, X86TargetMachine &TM)
static bool	isSafeToClobberEFLAGS (MachineBasicBlock &MBB, MachineBasicBlock::iterator I)
static bool	hasLiveCondCodeDef (MachineInstr *MI)
static X86::CondCode	GetCondFromBranchOpc (unsigned BrOpc)
static bool	isBrAnalysisUnpredicatedTerminator (const MachineInstr *MI, const X86InstrInfo &TII)
static const MachineInstrBuilder &	X86InstrAddOperand (MachineInstrBuilder &MIB, const MachineOperand &MO)
static unsigned	getStoreRegOpcode (const TargetRegisterClass *RC, bool isStackAligned)
static unsigned	getLoadRegOpcode (const TargetRegisterClass *RC, bool isStackAligned)
static MachineInstr *	FuseTwoAddrInst (MachineFunction &MF, unsigned Opcode, const SmallVectorImpl< MachineOperand > &MOs, MachineInstr *MI, const TargetInstrInfo &TII)
static MachineInstr *	FuseInst (MachineFunction &MF, unsigned Opcode, unsigned OpNo, const SmallVectorImpl< MachineOperand > &MOs, MachineInstr *MI, const TargetInstrInfo &TII)
static MachineInstr *	MakeM0Inst (const TargetInstrInfo &TII, unsigned Opcode, const SmallVectorImpl< MachineOperand > &MOs, MachineInstr *MI)
static unsigned	sizePCRelativeBlockAddress ()
static unsigned	sizeGlobalAddress (bool dword)
static unsigned	sizeConstPoolAddress (bool dword)
static unsigned	sizeExternalSymbolAddress (bool dword)
static unsigned	sizeJumpTableAddress (bool dword)
static unsigned	sizeConstant (unsigned Size)
static unsigned	sizeRegModRMByte ()
static unsigned	sizeSIBByte ()
static unsigned	getDisplacementFieldSize (const MachineOperand *RelocOp)
static unsigned	getMemModRMByteSize (const MachineInstr &MI, unsigned Op, bool IsPIC, bool Is64BitMode)
static unsigned	GetInstSizeWithDesc (const MachineInstr &MI, const TargetInstrDesc *Desc, bool IsPIC, bool Is64BitMode)
Variables
cl::opt< bool >	NoFusing ("disable-spill-fusing", cl::desc("Disable fusing of spill code into instructions"))
cl::opt< bool >	PrintFailedFusing ("print-failed-fuse-candidates", cl::desc("Print instructions that the allocator wants to"" fuse, but the X86 backend currently can't"), cl::Hidden)
cl::opt< bool >	ReMatPICStubLoad ("remat-pic-stub-load", cl::desc("Re-materialize load from stub in PIC mode"), cl::init(false), cl::Hidden)

---

Function Documentation

static MachineInstr* FuseInst	(	MachineFunction &	MF,
		unsigned	Opcode,
		unsigned	OpNo,
		const SmallVectorImpl< MachineOperand > &	MOs,
		MachineInstr *	MI,
		const TargetInstrInfo &	TII
	)			[static]

Definition at line 1972 of file X86InstrInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::MachineFunction::CreateMachineInstr(), llvm::TargetInstrInfo::get(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::isReg(), llvm::SmallVectorImpl< T >::size(), and X86InstrAddOperand().

static MachineInstr* FuseTwoAddrInst	(	MachineFunction &	MF,
		unsigned	Opcode,
		const SmallVectorImpl< MachineOperand > &	MOs,
		MachineInstr *	MI,
		const TargetInstrInfo &	TII
	)			[static]

Definition at line 1945 of file X86InstrInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::MachineFunction::CreateMachineInstr(), llvm::TargetInstrInfo::get(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getDesc(), llvm::MachineInstr::getNumOperands(), llvm::TargetInstrDesc::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::SmallVectorImpl< T >::size(), and X86InstrAddOperand().

static X86::CondCode GetCondFromBranchOpc

(

unsigned

BrOpc

)

[static]

Definition at line 1400 of file X86InstrInfo.cpp.

References llvm::X86::COND_A, llvm::X86::COND_AE, llvm::X86::COND_B, llvm::X86::COND_BE, llvm::X86::COND_E, llvm::X86::COND_G, llvm::X86::COND_GE, llvm::X86::COND_INVALID, llvm::X86::COND_L, llvm::X86::COND_LE, llvm::X86::COND_NE, llvm::X86::COND_NO, llvm::X86::COND_NP, llvm::X86::COND_NS, llvm::X86::COND_O, llvm::X86::COND_P, and llvm::X86::COND_S.

static unsigned getDisplacementFieldSize

(

const MachineOperand *

RelocOp

)

[static]

Definition at line 2680 of file X86InstrInfo.cpp.

References llvm::MachineOperand::isCPI(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isJTI(), sizeConstant(), sizeConstPoolAddress(), sizeGlobalAddress(), and sizeJumpTableAddress().

Referenced by getMemModRMByteSize().

static unsigned GetInstSizeWithDesc	(	const MachineInstr &	MI,
		const TargetInstrDesc *	Desc,
		bool	IsPIC,
		bool	Is64BitMode
	)			[static]

Definition at line 2776 of file X86InstrInfo.cpp.

References llvm::X86II::AddRegFrm, llvm::X86II::AdSize, AI, llvm::cerr(), llvm::X86II::D8, llvm::X86II::D9, llvm::X86II::DA, llvm::X86II::DB, llvm::TargetInstrInfo::DBG_LABEL, llvm::X86II::DC, llvm::X86II::DD, llvm::X86II::DE, llvm::TargetInstrInfo::DECLARE, llvm::X86InstrInfo::determineREX(), llvm::X86II::DF, llvm::MachineInstr::dump(), llvm::TargetInstrInfo::EH_LABEL, llvm::X86II::FormMask, llvm::X86II::FS, llvm::TargetAsmInfo::getInlineAsmLength(), getMemModRMByteSize(), llvm::TargetInstrDesc::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::TargetInstrDesc::getOperandConstraint(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getSymbolName(), llvm::MachineFunction::getTarget(), llvm::TargetMachine::getTargetAsmInfo(), llvm::X86II::GS, llvm::TargetInstrInfo::IMPLICIT_DEF, llvm::TargetInstrInfo::INLINEASM, llvm::MachineOperand::isCPI(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isJTI(), llvm::MachineOperand::isMBB(), llvm::MachineOperand::isSymbol(), llvm::TargetInstrDesc::isVariadic(), llvm::X86II::LOCK, llvm::X86II::MRM0m, llvm::X86II::MRM0r, llvm::X86II::MRM1m, llvm::X86II::MRM1r, llvm::X86II::MRM2m, llvm::X86II::MRM2r, llvm::X86II::MRM3m, llvm::X86II::MRM3r, llvm::X86II::MRM4m, llvm::X86II::MRM4r, llvm::X86II::MRM5m, llvm::X86II::MRM5r, llvm::X86II::MRM6m, llvm::X86II::MRM6r, llvm::X86II::MRM7m, llvm::X86II::MRM7r, llvm::X86II::MRMDestMem, llvm::X86II::MRMDestReg, llvm::X86II::MRMInitReg, llvm::X86II::MRMSrcMem, llvm::X86II::MRMSrcReg, llvm::X86II::Op0Mask, llvm::TargetInstrDesc::Opcode, llvm::X86II::OpSize, llvm::X86II::Pseudo, llvm::X86II::RawFrm, llvm::X86II::REP, llvm::X86II::SegOvrMask, sizeConstant(), sizeConstPoolAddress(), sizeExternalSymbolAddress(), sizeGlobalAddress(), sizeJumpTableAddress(), llvm::X86InstrInfo::sizeOfImm(), sizePCRelativeBlockAddress(), sizeRegModRMByte(), llvm::X86II::T8, llvm::X86II::TA, llvm::X86II::TB, llvm::TOI::TIED_TO, llvm::TargetInstrDesc::TSFlags, llvm::X86II::XD, and llvm::X86II::XS.

Referenced by llvm::X86InstrInfo::GetInstSizeInBytes().

static unsigned getLoadRegOpcode	(	const TargetRegisterClass *	RC,
		bool	isStackAligned
	)			[static]

Definition at line 1843 of file X86InstrInfo.cpp.

Referenced by llvm::X86InstrInfo::loadRegFromAddr(), llvm::X86InstrInfo::loadRegFromStackSlot(), and llvm::X86InstrInfo::unfoldMemoryOperand().

static unsigned getMemModRMByteSize	(	const MachineInstr &	MI,
		unsigned	Op,
		bool	IsPIC,
		bool	Is64BitMode
	)			[static]

Definition at line 2701 of file X86InstrInfo.cpp.

References Base, BaseReg, llvm::N86::EBP, llvm::N86::ESP, getDisplacementFieldSize(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::X86RegisterInfo::getX86RegNum(), IndexReg, llvm::MachineOperand::isCPI(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isJTI(), and sizeSIBByte().

Referenced by GetInstSizeWithDesc().

static unsigned getStoreRegOpcode	(	const TargetRegisterClass *	RC,
		bool	isStackAligned
	)			[static]

Definition at line 1778 of file X86InstrInfo.cpp.

Referenced by llvm::X86InstrInfo::storeRegToAddr(), llvm::X86InstrInfo::storeRegToStackSlot(), and llvm::X86InstrInfo::unfoldMemoryOperand().

static bool hasLiveCondCodeDef

(

MachineInstr *

MI

)

[static]

hasLiveCondCodeDef - True if MI has a condition code def, e.g. EFLAGS, that is not marked dead.

Definition at line 992 of file X86InstrInfo.cpp.

References llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isDead(), llvm::MachineOperand::isDef(), and llvm::MachineOperand::isReg().

Referenced by llvm::X86InstrInfo::convertToThreeAddress().

static bool isBrAnalysisUnpredicatedTerminator	(	const MachineInstr *	MI,
		const X86InstrInfo &	TII
	)			[static]

Definition at line 1481 of file X86InstrInfo.cpp.

References llvm::MachineInstr::getOpcode(), and llvm::X86InstrInfo::isUnpredicatedTerminator().

Referenced by llvm::X86InstrInfo::AnalyzeBranch().

static bool isGVStub	(	GlobalValue *	GV,
		X86TargetMachine &	TM
	)			[inline, static]

isGVStub - Return true if the GV requires an extra load to get the real address.

Definition at line 789 of file X86InstrInfo.cpp.

References llvm::TargetMachine::getSubtarget().

Referenced by llvm::X86InstrInfo::isInvariantLoad(), and llvm::X86InstrInfo::isReallyTriviallyReMaterializable().

static bool isSafeToClobberEFLAGS	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	I
	)			[static]

isSafeToClobberEFLAGS - Return true if it's safe insert an instruction that would clobber the EFLAGS condition register. Note the result may be conservative. If it cannot definitely determine the safety after visiting two instructions it assumes it's not safe.

Definition at line 869 of file X86InstrInfo.cpp.

References llvm::MachineBasicBlock::end(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), and llvm::MachineOperand::isUse().

Referenced by llvm::X86InstrInfo::reMaterialize().

static MachineInstr* MakeM0Inst	(	const TargetInstrInfo &	TII,
		unsigned	Opcode,
		const SmallVectorImpl< MachineOperand > &	MOs,
		MachineInstr *	MI
	)			[static]

Definition at line 1996 of file X86InstrInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::TargetInstrInfo::get(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), MF, llvm::SmallVectorImpl< T >::size(), and X86InstrAddOperand().

static bool regIsPICBase	(	unsigned	BaseReg,
		const MachineRegisterInfo &	MRI
	)			[static]

regIsPICBase - Return true if register is PIC base (i.e.g defined by X86::MOVPC32r.

Definition at line 774 of file X86InstrInfo.cpp.

References llvm::MachineRegisterInfo::def_begin(), llvm::MachineRegisterInfo::def_end(), E, and llvm::MachineInstr::getOpcode().

Referenced by llvm::X86InstrInfo::isReallyTriviallyReMaterializable().

static unsigned sizeConstant

(

unsigned

Size

)

[static]

Definition at line 2668 of file X86InstrInfo.cpp.

Referenced by getDisplacementFieldSize(), and GetInstSizeWithDesc().

static unsigned sizeConstPoolAddress

(

bool

dword

)

[static]

sizeConstPoolAddress - Give the size of the emission of this constant pool address

Definition at line 2650 of file X86InstrInfo.cpp.

Referenced by getDisplacementFieldSize(), and GetInstSizeWithDesc().

static unsigned sizeExternalSymbolAddress

(

bool

dword

)

[static]

sizeExternalSymbolAddress - Give the size of the emission of this external symbol

Definition at line 2657 of file X86InstrInfo.cpp.

Referenced by GetInstSizeWithDesc().

static unsigned sizeGlobalAddress

(

bool

dword

)

[static]

sizeGlobalAddress - Give the size of the emission of this global address

Definition at line 2643 of file X86InstrInfo.cpp.

Referenced by getDisplacementFieldSize(), and GetInstSizeWithDesc().

static unsigned sizeJumpTableAddress

(

bool

dword

)

[static]

sizeJumpTableAddress - Give the size of the emission of this jump table address

Definition at line 2664 of file X86InstrInfo.cpp.

Referenced by getDisplacementFieldSize(), and GetInstSizeWithDesc().

static unsigned sizePCRelativeBlockAddress

(

)

[static]

sizePCRelativeBlockAddress - This method returns the size of a PC relative block address instruction

Definition at line 2637 of file X86InstrInfo.cpp.

Referenced by GetInstSizeWithDesc().

static unsigned sizeRegModRMByte

(

)

[static]

Definition at line 2672 of file X86InstrInfo.cpp.

Referenced by GetInstSizeWithDesc().

static unsigned sizeSIBByte

(

)

[static]

Definition at line 2676 of file X86InstrInfo.cpp.

Referenced by getMemModRMByteSize().

static const MachineInstrBuilder& X86InstrAddOperand	(	MachineInstrBuilder &	MIB,
		const MachineOperand &	MO
	)			[static]

Definition at line 1595 of file X86InstrInfo.cpp.

References llvm::MachineInstrBuilder::addConstantPoolIndex(), llvm::MachineInstrBuilder::addExternalSymbol(), llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addGlobalAddress(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addJumpTableIndex(), llvm::MachineInstrBuilder::addReg(), llvm::MachineOperand::getGlobal(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getIndex(), llvm::MachineOperand::getOffset(), llvm::MachineOperand::getReg(), llvm::MachineOperand::getSubReg(), llvm::MachineOperand::getSymbolName(), llvm::MachineOperand::isCPI(), llvm::MachineOperand::isDead(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isFI(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isImplicit(), llvm::MachineOperand::isJTI(), llvm::MachineOperand::isKill(), llvm::MachineOperand::isReg(), and llvm::MachineOperand::isSymbol().

Referenced by FuseInst(), FuseTwoAddrInst(), llvm::X86InstrInfo::loadRegFromAddr(), MakeM0Inst(), llvm::X86InstrInfo::storeRegToAddr(), and llvm::X86InstrInfo::unfoldMemoryOperand().

---

Variable Documentation

cl::opt<bool> NoFusing("disable-spill-fusing", cl::desc("Disable fusing of spill code into instructions")) [static]

Referenced by llvm::X86InstrInfo::canFoldMemoryOperand(), and llvm::X86InstrInfo::foldMemoryOperandImpl().

cl::opt<bool> PrintFailedFusing("print-failed-fuse-candidates", cl::desc("Print instructions that the allocator wants to"" fuse, but the X86 backend currently can't"), cl::Hidden) [static]

cl::opt<bool> ReMatPICStubLoad("remat-pic-stub-load", cl::desc("Re-materialize load from stub in PIC mode"), cl::init(false), cl::Hidden) [static]

Referenced by llvm::X86InstrInfo::isReallyTriviallyReMaterializable().