MicroMipsSizeReduction.cpp File Reference

#include "Mips.h"
#include "MipsInstrInfo.h"
#include "MipsSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/Debug.h"

Include dependency graph for MicroMipsSizeReduction.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "micromips-reduce-size"
#define	MICROMIPS_SIZE_REDUCE_NAME   "MicroMips instruction size reduce pass"

Functions
	STATISTIC (NumReduced, "Number of instructions reduced (32-bit to 16-bit ones, " "or two instructions into one")
	INITIALIZE_PASS (MicroMipsSizeReduce, DEBUG_TYPE, MICROMIPS_SIZE_REDUCE_NAME, false, false) static bool IsSP(const MachineOperand &MO)
static bool	isMMThreeBitGPRegister (const MachineOperand &MO)
static bool	isMMSourceRegister (const MachineOperand &MO)
static bool	GetImm (MachineInstr *MI, unsigned Op, int64_t &Imm)
static bool	AddiuspImmValue (int64_t Value)
static bool	InRange (int64_t Value, unsigned short Shift, int LBound, int HBound)
static bool	ImmInRange (MachineInstr *MI, const ReduceEntry &Entry)
static bool	CheckXWPInstr (MachineInstr *MI, bool ReduceToLwp, const ReduceEntry &Entry)
static bool	ConsecutiveRegisters (unsigned Reg1, unsigned Reg2)
static bool	ConsecutiveInstr (MachineInstr *MI1, MachineInstr *MI2)
static bool	IsMovepSrcRegister (unsigned Reg)
static bool	IsMovepDestinationReg (unsigned Reg)
static bool	IsMovepDestinationRegPair (unsigned R0, unsigned R1)

Detailed Description

This pass is used to reduce the size of instructions where applicable.

TODO: Implement microMIPS64 support.

Definition in file MicroMipsSizeReduction.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "micromips-reduce-size"

Definition at line 22 of file MicroMipsSizeReduction.cpp.

MICROMIPS_SIZE_REDUCE_NAME

#define MICROMIPS_SIZE_REDUCE_NAME   "MicroMips instruction size reduce pass"

Definition at line 23 of file MicroMipsSizeReduction.cpp.

Function Documentation

AddiuspImmValue()

static bool AddiuspImmValue ( int64_t  Value )

static

Definition at line 317 of file MicroMipsSizeReduction.cpp.

CheckXWPInstr()

static bool CheckXWPInstr ( MachineInstr *  MI, bool  ReduceToLwp, const ReduceEntry &  Entry  )

static

Definition at line 351 of file MicroMipsSizeReduction.cpp.

ConsecutiveInstr()

static bool ConsecutiveInstr ( MachineInstr *  MI1, MachineInstr *  MI2  )

static

Definition at line 398 of file MicroMipsSizeReduction.cpp.

References ConsecutiveRegisters(), GetImm(), llvm::MachineInstr::getOperand(), and llvm::MachineOperand::getReg().

ConsecutiveRegisters()

static bool ConsecutiveRegisters ( unsigned  Reg1, unsigned  Reg2  )

static

Definition at line 378 of file MicroMipsSizeReduction.cpp.

References i, RA, Registers, T1, and llvm::X86II::T8.

Referenced by ConsecutiveInstr().

GetImm()

static bool GetImm ( MachineInstr *  MI, unsigned  Op, int64_t &  Imm  )

static

Definition at line 308 of file MicroMipsSizeReduction.cpp.

References MI.

Referenced by ConsecutiveInstr(), and llvm::ShapeT::deduceImm().

ImmInRange()

static bool ImmInRange ( MachineInstr *  MI, const ReduceEntry &  Entry  )

static

Definition at line 337 of file MicroMipsSizeReduction.cpp.

INITIALIZE_PASS()

INITIALIZE_PASS	(	MicroMipsSizeReduce	,
		DEBUG_TYPE	,
		MICROMIPS_SIZE_REDUCE_NAME	,
		false	,
		false
	)		const &

Definition at line 282 of file MicroMipsSizeReduction.cpp.

InRange()

static bool InRange ( int64_t  Value, unsigned short  Shift, int  LBound, int  HBound  )

static

Definition at line 327 of file MicroMipsSizeReduction.cpp.

References Shift.

Referenced by llvm::ConstantFoldGetElementPtr().

isMMSourceRegister()

static bool isMMSourceRegister ( const MachineOperand &  MO )

static

Definition at line 300 of file MicroMipsSizeReduction.cpp.

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

isMMThreeBitGPRegister()

static bool isMMThreeBitGPRegister ( const MachineOperand &  MO )

static

Definition at line 293 of file MicroMipsSizeReduction.cpp.

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

IsMovepDestinationReg()

static bool IsMovepDestinationReg ( unsigned  Reg )

static

Definition at line 585 of file MicroMipsSizeReduction.cpp.

References Reg.

IsMovepDestinationRegPair()

static bool IsMovepDestinationRegPair ( unsigned  R0, unsigned  R1  )

static

Definition at line 596 of file MicroMipsSizeReduction.cpp.

IsMovepSrcRegister()

static bool IsMovepSrcRegister ( unsigned  Reg )

static

Definition at line 573 of file MicroMipsSizeReduction.cpp.

References Reg.

STATISTIC()

STATISTIC

(

NumReduced

)