X86FixupLEAs.cpp File Reference

#include "X86.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetSchedule.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

Include dependency graph for X86FixupLEAs.cpp:

Go to the source code of this file.

Macros
#define	FIXUPLEA_DESC   "X86 LEA Fixup"
#define	FIXUPLEA_NAME   "x86-fixup-LEAs"
#define	DEBUG_TYPE   FIXUPLEA_NAME

Functions
	STATISTIC (NumLEAs, "Number of LEA instructions created")
static bool	getPreviousInstr (MachineBasicBlock::iterator &I, MachineFunction::iterator MFI)
	getPreviousInstr - Given a reference to an instruction in a basic block, return a reference to the previous instruction in the block, wrapping around to the last instruction of the block if the block branches to itself. More...
static bool	isLEA (const int Opcode)
static bool	isInefficientLEAReg (unsigned int Reg)
static bool	isRegOperand (const MachineOperand &Op)
static bool	hasInefficientLEABaseReg (const MachineOperand &Base, const MachineOperand &Index)
	Returns true if this LEA uses base an index registers, and the base register is known to be inefficient for the subtarget. More...
static bool	hasLEAOffset (const MachineOperand &Offset)
static int	getADDrrFromLEA (int LEAOpcode)
static int	getADDriFromLEA (int LEAOpcode, const MachineOperand &Offset)
static bool	isLEASimpleIncOrDec (MachineInstr &LEA)
	isLEASimpleIncOrDec - Does this LEA have one these forms: lea reg, 1(reg) lea reg, -1(reg) More...

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   FIXUPLEA_NAME

Definition at line 31 of file X86FixupLEAs.cpp.

FIXUPLEA_DESC

#define FIXUPLEA_DESC   "X86 LEA Fixup"

Definition at line 28 of file X86FixupLEAs.cpp.

FIXUPLEA_NAME

#define FIXUPLEA_NAME   "x86-fixup-LEAs"

Definition at line 29 of file X86FixupLEAs.cpp.

Function Documentation

getADDriFromLEA()

static int getADDriFromLEA ( int  LEAOpcode, const MachineOperand &  Offset  )

inlinestatic

Definition at line 315 of file X86FixupLEAs.cpp.

References llvm::MachineOperand::getImm(), llvm::MachineOperand::isImm(), llvm::isInt< 8 >(), and llvm_unreachable.

Referenced by isLEASimpleIncOrDec().

getADDrrFromLEA()

static int getADDrrFromLEA ( int  LEAOpcode )

inlinestatic

Definition at line 301 of file X86FixupLEAs.cpp.

References llvm_unreachable.

Referenced by isLEASimpleIncOrDec().

getPreviousInstr()

static bool getPreviousInstr ( MachineBasicBlock::iterator &  I, MachineFunction::iterator  MFI  )

inlinestatic

getPreviousInstr - Given a reference to an instruction in a basic block, return a reference to the previous instruction in the block, wrapping around to the last instruction of the block if the block branches to itself.

Definition at line 236 of file X86FixupLEAs.cpp.

References I.

hasInefficientLEABaseReg()

static bool hasInefficientLEABaseReg ( const MachineOperand &  Base, const MachineOperand &  Index  )

inlinestatic

Returns true if this LEA uses base an index registers, and the base register is known to be inefficient for the subtarget.

Definition at line 291 of file X86FixupLEAs.cpp.

References llvm::MachineOperand::getReg(), isInefficientLEAReg(), llvm::MachineOperand::isReg(), and isRegOperand().

Referenced by isLEASimpleIncOrDec().

hasLEAOffset()

static bool hasLEAOffset ( const MachineOperand &  Offset )

inlinestatic

Definition at line 297 of file X86FixupLEAs.cpp.

References llvm::MachineOperand::getImm(), llvm::MachineOperand::isGlobal(), and llvm::MachineOperand::isImm().

Referenced by isLEASimpleIncOrDec().

isInefficientLEAReg()

static bool isInefficientLEAReg ( unsigned int  Reg )

inlinestatic

Definition at line 278 of file X86FixupLEAs.cpp.

Referenced by hasInefficientLEABaseReg(), and isLEASimpleIncOrDec().

isLEA()

static bool isLEA ( const int  Opcode )

inlinestatic

Definition at line 273 of file X86FixupLEAs.cpp.

Referenced by isLEASimpleIncOrDec().

isLEASimpleIncOrDec()

static bool isLEASimpleIncOrDec ( MachineInstr &  LEA )

inlinestatic

isLEASimpleIncOrDec - Does this LEA have one these forms: lea reg, 1(reg) lea reg, -1(reg)

Definition at line 333 of file X86FixupLEAs.cpp.

References llvm::ARM_AM::add, llvm::MachineInstrBuilder::add(), llvm::X86::AddrBaseReg, llvm::X86::AddrDisp, llvm::MachineInstrBuilder::addReg(), llvm::X86::AddrIndexReg, llvm::X86::AddrScaleAmt, llvm::X86::AddrSegmentReg, assert(), llvm::BuildMI(), llvm::HexagonInstrInfo::copyPhysReg(), llvm::dbgs(), llvm::MachineInstr::dump(), llvm::N86::ESP, getADDriFromLEA(), getADDrrFromLEA(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getDesc(), llvm::MachineOperand::getImm(), llvm::X86II::getMemoryOperandNo(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::X86II::getOperandBias(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), llvm::MachineOperand::getReg(), llvm::getX86SubSuperRegister(), hasInefficientLEABaseReg(), hasLEAOffset(), I, llvm::MachineOperand::isImm(), isInefficientLEAReg(), llvm::MachineOperand::isKill(), isLEA(), llvm::MachineOperand::isReg(), LLVM_DEBUG, TII, and llvm::MCInstrDesc::TSFlags.

isRegOperand()

static bool isRegOperand ( const MachineOperand &  Op )

inlinestatic

Definition at line 283 of file X86FixupLEAs.cpp.

References llvm::MachineOperand::getReg(), and llvm::MachineOperand::isReg().

Referenced by hasInefficientLEABaseReg().

STATISTIC()

STATISTIC	(	NumLEAs	,
		"Number of LEA instructions created"
	)