Thumb2SizeReduction.cpp File Reference

#include "ARM.h"
#include "ARMBaseInstrInfo.h"
#include "ARMSubtarget.h"
#include "MCTargetDesc/ARMBaseInfo.h"
#include "Thumb2InstrInfo.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <functional>
#include <iterator>
#include <utility>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "thumb2-reduce-size"
#define	THUMB2_SIZE_REDUCE_NAME   "Thumb2 instruction size reduce pass"

Functions
	STATISTIC (NumNarrows, "Number of 32-bit instrs reduced to 16-bit ones")
	STATISTIC (Num2Addrs, "Number of 32-bit instrs reduced to 2addr 16-bit ones")
	STATISTIC (NumLdSts, "Number of 32-bit load / store reduced to 16-bit ones")
	INITIALIZE_PASS (Thumb2SizeReduce, DEBUG_TYPE, THUMB2_SIZE_REDUCE_NAME, false, false) Thumb2SizeReduce
static bool	HasImplicitCPSRDef (const MCInstrDesc &MCID)
static bool	isHighLatencyCPSR (MachineInstr *Def)
static bool	VerifyLowRegs (MachineInstr *MI)
static bool	UpdateCPSRDef (MachineInstr &MI, bool LiveCPSR, bool &DefCPSR)
static bool	UpdateCPSRUse (MachineInstr &MI, bool LiveCPSR)

Variables
static cl::opt< int >	ReduceLimit ("t2-reduce-limit", cl::init(-1), cl::Hidden)
static cl::opt< int >	ReduceLimit2Addr ("t2-reduce-limit2", cl::init(-1), cl::Hidden)
static cl::opt< int >	ReduceLimitLdSt ("t2-reduce-limit3", cl::init(-1), cl::Hidden)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "thumb2-reduce-size"

Definition at line 47 of file Thumb2SizeReduction.cpp.

THUMB2_SIZE_REDUCE_NAME

#define THUMB2_SIZE_REDUCE_NAME   "Thumb2 instruction size reduce pass"

Definition at line 48 of file Thumb2SizeReduction.cpp.

Function Documentation

HasImplicitCPSRDef()

static bool HasImplicitCPSRDef ( const MCInstrDesc &  MCID )

static

Definition at line 255 of file Thumb2SizeReduction.cpp.

References llvm::MCInstrDesc::implicit_defs(), and llvm::is_contained().

INITIALIZE_PASS()

INITIALIZE_PASS	(	Thumb2SizeReduce	,
		DEBUG_TYPE	,
		THUMB2_SIZE_REDUCE_NAME	,
		false	,
		false
	)

Definition at line 242 of file Thumb2SizeReduction.cpp.

References llvm_unreachable.

isHighLatencyCPSR()

static bool isHighLatencyCPSR ( MachineInstr *  Def )

static

Definition at line 260 of file Thumb2SizeReduction.cpp.

STATISTIC() [1/3]

STATISTIC	(	Num2Addrs	,
		"Number of 32-bit instrs reduced to 2addr 16-bit ones"
	)

STATISTIC() [2/3]

STATISTIC	(	NumLdSts	,
		"Number of 32-bit load / store reduced to 16-bit ones"
	)

STATISTIC() [3/3]

STATISTIC	(	NumNarrows	,
		"Number of 32-bit instrs reduced to 16-bit ones"
	)

UpdateCPSRDef()

static bool UpdateCPSRDef ( MachineInstr &  MI, bool  LiveCPSR, bool &  DefCPSR  )

static

Definition at line 979 of file Thumb2SizeReduction.cpp.

References llvm::MachineOperand::getReg(), llvm::MachineOperand::isDead(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isUndef(), llvm::MachineOperand::isUse(), and MI.

UpdateCPSRUse()

static bool UpdateCPSRUse ( MachineInstr &  MI, bool  LiveCPSR  )

static

Definition at line 995 of file Thumb2SizeReduction.cpp.

References assert(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isKill(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isUndef(), and MI.

VerifyLowRegs()

static bool VerifyLowRegs ( MachineInstr *  MI )

static

Definition at line 372 of file Thumb2SizeReduction.cpp.

References llvm::MachineOperand::getReg(), llvm::isARMLowRegister(), llvm::MachineOperand::isImplicit(), llvm::MachineOperand::isReg(), and MI.

Variable Documentation

ReduceLimit

cl::opt< int > ReduceLimit("t2-reduce-limit", cl::init(-1), cl::Hidden) ( "t2-reduce-limit"  , cl::init(-1)  , cl::Hidden    )

static

ReduceLimit2Addr

cl::opt< int > ReduceLimit2Addr("t2-reduce-limit2", cl::init(-1), cl::Hidden) ( "t2-reduce-limit2"  , cl::init(-1)  , cl::Hidden    )

static

ReduceLimitLdSt

cl::opt< int > ReduceLimitLdSt("t2-reduce-limit3", cl::init(-1), cl::Hidden) ( "t2-reduce-limit3"  , cl::init(-1)  , cl::Hidden    )

static