LLVM: lib/Target/Mips/MicroMipsSizeReduction.cpp File Reference

LLVM 20.0.0git

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"

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.

References ImmInRange(), and MI.

◆ 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 Registers.

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(), llvm::ShapeT::deduceImm(), and ImmInRange().

◆ ImmInRange()

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

static

Definition at line 337 of file MicroMipsSizeReduction.cpp.

References GetImm(), InRange(), and MI.

Referenced by CheckXWPInstr().

◆ 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.

Referenced by llvm::ConstantFoldGetElementPtr(), llvm::ConstantExpr::getGetElementPtr(), ImmInRange(), splitGlobal(), and WriteOptimizationInfo().

◆ 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.

◆ 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.

◆ STATISTIC()

STATISTIC ( NumReduced )