MicroMipsSizeReduction.cpp File Reference

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

#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"

Enumerations
enum	OperandTransfer
	Order of operands to transfer. More...
enum	ReduceType
	Reduction type. More...

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 23 of file MicroMipsSizeReduction.cpp.

MICROMIPS_SIZE_REDUCE_NAME

#define MICROMIPS_SIZE_REDUCE_NAME   "MicroMips instruction size reduce pass"

Definition at line 24 of file MicroMipsSizeReduction.cpp.

Enumeration Type Documentation

OperandTransfer

enum OperandTransfer

Order of operands to transfer.

Definition at line 33 of file MicroMipsSizeReduction.cpp.

ReduceType

enum ReduceType

Reduction type.

Definition at line 46 of file MicroMipsSizeReduction.cpp.

Function Documentation

AddiuspImmValue()

static bool AddiuspImmValue ( int64_t  Value )

static

Definition at line 318 of file MicroMipsSizeReduction.cpp.

CheckXWPInstr()

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

static

Definition at line 352 of file MicroMipsSizeReduction.cpp.

References llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), ImmInRange(), and RA.

ConsecutiveInstr()

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

static

Definition at line 399 of file MicroMipsSizeReduction.cpp.

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

ConsecutiveRegisters()

static bool ConsecutiveRegisters ( unsigned  Reg1, unsigned  Reg2  )

static

Definition at line 379 of file MicroMipsSizeReduction.cpp.

References RA, llvm::SmallVectorBase::size(), T1, and llvm::X86II::T8.

Referenced by ConsecutiveInstr().

GetImm()

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

static

Definition at line 309 of file MicroMipsSizeReduction.cpp.

References llvm::MachineOperand::getImm(), llvm::MachineInstr::getOperand(), and llvm::MachineOperand::isImm().

Referenced by ConsecutiveInstr(), and ImmInRange().

ImmInRange()

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

static

Definition at line 338 of file MicroMipsSizeReduction.cpp.

References GetImm(), and InRange().

Referenced by CheckXWPInstr().

INITIALIZE_PASS()

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

Definition at line 283 of file MicroMipsSizeReduction.cpp.

InRange()

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

static

Definition at line 328 of file MicroMipsSizeReduction.cpp.

Referenced by llvm::ConstantFoldGetElementPtr(), and ImmInRange().

isMMSourceRegister()

static bool isMMSourceRegister ( const MachineOperand &  MO )

static

Definition at line 301 of file MicroMipsSizeReduction.cpp.

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

isMMThreeBitGPRegister()

static bool isMMThreeBitGPRegister ( const MachineOperand &  MO )

static

Definition at line 294 of file MicroMipsSizeReduction.cpp.

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

Referenced by IsMovepDestinationRegPair().

IsMovepDestinationReg()

static bool IsMovepDestinationReg ( unsigned  Reg )

static

Definition at line 586 of file MicroMipsSizeReduction.cpp.

Referenced by IsMovepDestinationRegPair().

IsMovepDestinationRegPair()

static bool IsMovepDestinationRegPair ( unsigned  R0, unsigned  R1  )

static

Definition at line 597 of file MicroMipsSizeReduction.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineFunction::begin(), llvm::BuildMI(), llvm::dbgs(), E, llvm::MachineFunction::end(), llvm::MachineBasicBlock::erase_instr(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getFlags(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineFunction::getSubtarget(), I, llvm::MachineBasicBlock::instr_begin(), llvm::MachineBasicBlock::instr_end(), llvm::MachineInstr::isBundle(), isMMThreeBitGPRegister(), IsMovepDestinationReg(), IsMovepSrcRegister(), llvm::MachineInstr::isTransient(), LLVM_DEBUG, llvm_unreachable, MI, Modified, llvm::MachineInstr::setDesc(), and llvm::MachineInstrBuilder::setMIFlags().

IsMovepSrcRegister()

static bool IsMovepSrcRegister ( unsigned  Reg )

static

Definition at line 574 of file MicroMipsSizeReduction.cpp.

Referenced by IsMovepDestinationRegPair().

STATISTIC()

STATISTIC

(

NumReduced

)