#include "ARM.h"
#include "ARMBaseInstrInfo.h"
#include "ARMBaseRegisterInfo.h"
#include "ARMISelLowering.h"
#include "ARMMachineFunctionInfo.h"
#include "ARMSubtarget.h"
#include "MCTargetDesc/ARMAddressingModes.h"
#include "MCTargetDesc/ARMBaseInfo.h"
#include "Utils/ARMBaseInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/LiveRegUnits.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterClassInfo.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Type.h"
#include "llvm/InitializePasses.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Pass.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstddef>
#include <cstdlib>
#include <iterator>
#include <limits>
#include <utility>

Macros
#define	DEBUG_TYPE "arm-ldst-opt"

#define	ARM_LOAD_STORE_OPT_NAME "ARM load / store optimization pass"

#define	ARM_PREALLOC_LOAD_STORE_OPT_NAME "ARM pre- register allocation load / store optimization pass"

Functions
	STATISTIC (NumLDMGened, "Number of ldm instructions generated")

	STATISTIC (NumSTMGened, "Number of stm instructions generated")

	STATISTIC (NumVLDMGened, "Number of vldm instructions generated")

	STATISTIC (NumVSTMGened, "Number of vstm instructions generated")

	STATISTIC (NumLdStMoved, "Number of load / store instructions moved")

	STATISTIC (NumLDRDFormed,"Number of ldrd created before allocation")

	STATISTIC (NumSTRDFormed,"Number of strd created before allocation")

	STATISTIC (NumLDRD2LDM, "Number of ldrd instructions turned back into ldm")

	STATISTIC (NumSTRD2STM, "Number of strd instructions turned back into stm")

	STATISTIC (NumLDRD2LDR, "Number of ldrd instructions turned back into ldr's")

	STATISTIC (NumSTRD2STR, "Number of strd instructions turned back into str's")

	INITIALIZE_PASS (ARMLoadStoreOpt, "arm-ldst-opt", ARM_LOAD_STORE_OPT_NAME, false, false) static bool definesCPSR(const MachineInstr &MI)

static int	getMemoryOpOffset (const MachineInstr &MI)

static const MachineOperand &	getLoadStoreBaseOp (const MachineInstr &MI)

static const MachineOperand &	getLoadStoreRegOp (const MachineInstr &MI)

static int	getLoadStoreMultipleOpcode (unsigned Opcode, ARM_AM::AMSubMode Mode)

static ARM_AM::AMSubMode	getLoadStoreMultipleSubMode (unsigned Opcode)

static bool	isT1i32Load (unsigned Opc)

static bool	isT2i32Load (unsigned Opc)

static bool	isi32Load (unsigned Opc)

static bool	isT1i32Store (unsigned Opc)

static bool	isT2i32Store (unsigned Opc)

static bool	isi32Store (unsigned Opc)

static bool	isLoadSingle (unsigned Opc)

static unsigned	getImmScale (unsigned Opc)

static unsigned	getLSMultipleTransferSize (const MachineInstr *MI)

static bool	ContainsReg (const ArrayRef< std::pair< unsigned, bool > > &Regs, unsigned Reg)

static bool	isValidLSDoubleOffset (int Offset)

static bool	mayCombineMisaligned (const TargetSubtargetInfo &STI, const MachineInstr &MI)
	Return true for loads/stores that can be combined to a double/multi operation without increasing the requirements for alignment.

static unsigned	getUpdatingLSMultipleOpcode (unsigned Opc, ARM_AM::AMSubMode Mode)

static int	isIncrementOrDecrement (const MachineInstr &MI, Register Reg, ARMCC::CondCodes Pred, Register PredReg)
	Check if the given instruction increments or decrements a register and return the amount it is incremented/decremented.

static MachineBasicBlock::iterator	findIncDecBefore (MachineBasicBlock::iterator MBBI, Register Reg, ARMCC::CondCodes Pred, Register PredReg, int &Offset)
	Searches for an increment or decrement of `Reg` before `MBBI`.

static MachineBasicBlock::iterator	findIncDecAfter (MachineBasicBlock::iterator MBBI, Register Reg, ARMCC::CondCodes Pred, Register PredReg, int &Offset, const TargetRegisterInfo *TRI)
	Searches for a increment or decrement of `Reg` after `MBBI`.

static unsigned	getPreIndexedLoadStoreOpcode (unsigned Opc, ARM_AM::AddrOpc Mode)

static unsigned	getPostIndexedLoadStoreOpcode (unsigned Opc, ARM_AM::AddrOpc Mode)

static bool	isMemoryOp (const MachineInstr &MI)
	Returns true if instruction is a memory operation that this pass is capable of operating on.

static void	InsertLDR_STR (MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, int Offset, bool isDef, unsigned NewOpc, unsigned Reg, bool RegDeadKill, bool RegUndef, unsigned BaseReg, bool BaseKill, bool BaseUndef, ARMCC::CondCodes Pred, unsigned PredReg, const TargetInstrInfo TII, MachineInstr MI)

	INITIALIZE_PASS_BEGIN (ARMPreAllocLoadStoreOpt, "arm-prera-ldst-opt", ARM_PREALLOC_LOAD_STORE_OPT_NAME, false, false) INITIALIZE_PASS_END(ARMPreAllocLoadStoreOpt

arm prera ldst static false cl::opt< unsigned >	InstReorderLimit ("arm-prera-ldst-opt-reorder-limit", cl::init(8), cl::Hidden)

static bool	IsSafeAndProfitableToMove (bool isLd, unsigned Base, MachineBasicBlock::iterator I, MachineBasicBlock::iterator E, SmallPtrSetImpl< MachineInstr * > &MemOps, SmallSet< unsigned, 4 > &MemRegs, const TargetRegisterInfo TRI, AliasAnalysis AA)

static void	forEachDbgRegOperand (MachineInstr *MI, std::function< void(MachineOperand &)> Fn)

static void	updateRegisterMapForDbgValueListAfterMove (SmallDenseMap< Register, SmallVector< MachineInstr * >, 8 > &RegisterMap, MachineInstr DbgValueListInstr, MachineInstr InstrToReplace)

static DebugVariable	createDebugVariableFromMachineInstr (MachineInstr *MI)

static int	getBaseOperandIndex (MachineInstr &MI)

static bool	isPostIndex (MachineInstr &MI)

static bool	isPreIndex (MachineInstr &MI)

static bool	isLegalOrConvertableAddressImm (unsigned Opcode, int Imm, const TargetInstrInfo *TII, int &CodesizeEstimate)

static void	AdjustBaseAndOffset (MachineInstr MI, Register NewBaseReg, int Offset, const TargetInstrInfo TII, const TargetRegisterInfo *TRI)

static MachineInstr *	createPostIncLoadStore (MachineInstr MI, int Offset, Register NewReg, const TargetInstrInfo TII, const TargetRegisterInfo *TRI)

Variables
static cl::opt< bool >	AssumeMisalignedLoadStores ("arm-assume-misaligned-load-store", cl::Hidden, cl::init(false), cl::desc("Be more conservative in ARM load/store opt"))
	This switch disables formation of double/multi instructions that could potentially lead to (new) alignment traps even with CCR.UNALIGN_TRP disabled.

arm prera ldst	opt

arm prera ldst	ARM_PREALLOC_LOAD_STORE_OPT_NAME

arm prera ldst	false

Macro Definition Documentation

◆ ARM_LOAD_STORE_OPT_NAME

#define ARM_LOAD_STORE_OPT_NAME "ARM load / store optimization pass"

Definition at line 95 of file ARMLoadStoreOptimizer.cpp.

◆ ARM_PREALLOC_LOAD_STORE_OPT_NAME

#define ARM_PREALLOC_LOAD_STORE_OPT_NAME "ARM pre- register allocation load / store optimization pass"

Definition at line 2133 of file ARMLoadStoreOptimizer.cpp.

◆ DEBUG_TYPE

#define DEBUG_TYPE "arm-ldst-opt"

Definition at line 72 of file ARMLoadStoreOptimizer.cpp.

Function Documentation

◆ AdjustBaseAndOffset()

static void AdjustBaseAndOffset	(	MachineInstr *	MI,
		Register	NewBaseReg,
		int	Offset,
		const TargetInstrInfo *	TII,
		const TargetRegisterInfo *	TRI
	)

static

Definition at line 3010 of file ARMLoadStoreOptimizer.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addImm(), assert(), llvm::BuildMI(), llvm::MachineInstrBuilder::cloneMemRefs(), getBaseOperandIndex(), llvm::MachineFunction::getRegInfo(), llvm::isLegalAddressImm(), llvm_unreachable, MI, MRI, llvm::Offset, TII, and TRI.

◆ ContainsReg()

static bool ContainsReg	(	const ArrayRef< std::pair< unsigned, bool > > &	Regs,
		unsigned	Reg
	)

static

Definition at line 615 of file ARMLoadStoreOptimizer.cpp.

◆ createDebugVariableFromMachineInstr()

static DebugVariable createDebugVariableFromMachineInstr ( MachineInstr * MI )

static

Definition at line 2522 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ createPostIncLoadStore()

static MachineInstr * createPostIncLoadStore	(	MachineInstr *	MI,
		int	Offset,
		Register	NewReg,
		const TargetInstrInfo *	TII,
		const TargetRegisterInfo *	TRI
	)

static

◆ findIncDecAfter()

static MachineBasicBlock::iterator findIncDecAfter	(	MachineBasicBlock::iterator	MBBI,
		Register	Reg,
		ARMCC::CondCodes	Pred,
		Register	PredReg,
		int &	Offset,
		const TargetRegisterInfo *	TRI
	)

static

Searches for a increment or decrement of Reg after MBBI.

Definition at line 1241 of file ARMLoadStoreOptimizer.cpp.

References llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getParent(), isIncrementOrDecrement(), MBB, MBBI, llvm::Offset, and TRI.

◆ findIncDecBefore()

static MachineBasicBlock::iterator findIncDecBefore	(	MachineBasicBlock::iterator	MBBI,
		Register	Reg,
		ARMCC::CondCodes	Pred,
		Register	PredReg,
		int &	Offset
	)

static

Searches for an increment or decrement of Reg before MBBI.

Definition at line 1221 of file ARMLoadStoreOptimizer.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getParent(), isIncrementOrDecrement(), MBB, MBBI, and llvm::Offset.

◆ forEachDbgRegOperand()

static void forEachDbgRegOperand	(	MachineInstr *	MI,
		std::function< void(MachineOperand &)>	Fn
	)

static

Definition at line 2492 of file ARMLoadStoreOptimizer.cpp.

References I, and MI.

Referenced by updateRegisterMapForDbgValueListAfterMove().

◆ getBaseOperandIndex()

static int getBaseOperandIndex ( MachineInstr & MI )

static

Definition at line 2876 of file ARMLoadStoreOptimizer.cpp.

References MI.

Referenced by AdjustBaseAndOffset().

◆ getImmScale()

static unsigned getImmScale ( unsigned Opc )

static

Definition at line 421 of file ARMLoadStoreOptimizer.cpp.

References llvm_unreachable.

◆ getLoadStoreBaseOp()

static const MachineOperand & getLoadStoreBaseOp ( const MachineInstr & MI )

static

Definition at line 246 of file ARMLoadStoreOptimizer.cpp.

References MI.

Referenced by mayCombineMisaligned().

◆ getLoadStoreMultipleOpcode()

static int getLoadStoreMultipleOpcode	(	unsigned	Opcode,
		ARM_AM::AMSubMode	Mode
	)

static

Definition at line 254 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::da, llvm::ARM_AM::db, llvm::ARM_AM::ia, llvm::ARM_AM::ib, and llvm_unreachable.

◆ getLoadStoreMultipleSubMode()

static ARM_AM::AMSubMode getLoadStoreMultipleSubMode ( unsigned Opcode )

static

Definition at line 339 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::da, llvm::ARM_AM::db, llvm::ARM_AM::ia, llvm::ARM_AM::ib, and llvm_unreachable.

◆ getLoadStoreRegOp()

static const MachineOperand & getLoadStoreRegOp ( const MachineInstr & MI )

static

Definition at line 250 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ getLSMultipleTransferSize()

static unsigned getLSMultipleTransferSize ( const MachineInstr * MI )

static

Definition at line 438 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ getMemoryOpOffset()

static int getMemoryOpOffset ( const MachineInstr & MI )

static

Definition at line 218 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::getAM3Offset(), llvm::ARM_AM::getAM3Op(), llvm::ARM_AM::getAM5Offset(), llvm::ARM_AM::getAM5Op(), MI, llvm::Offset, and llvm::ARM_AM::sub.

◆ getPostIndexedLoadStoreOpcode()

static unsigned getPostIndexedLoadStoreOpcode	(	unsigned	Opc,
		ARM_AM::AddrOpc	Mode
	)

static

Definition at line 1390 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::add, and llvm_unreachable.

Referenced by createPostIncLoadStore().

◆ getPreIndexedLoadStoreOpcode()

static unsigned getPreIndexedLoadStoreOpcode	(	unsigned	Opc,
		ARM_AM::AddrOpc	Mode
	)

static

Definition at line 1365 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::add, and llvm_unreachable.

◆ getUpdatingLSMultipleOpcode()

static unsigned getUpdatingLSMultipleOpcode	(	unsigned	Opc,
		ARM_AM::AMSubMode	Mode
	)

static

Definition at line 1119 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARM_AM::da, llvm::ARM_AM::db, llvm::ARM_AM::ia, llvm::ARM_AM::ib, and llvm_unreachable.

◆ INITIALIZE_PASS()

INITIALIZE_PASS	(	ARMLoadStoreOpt	,
		"arm-ldst-opt"	,
		ARM_LOAD_STORE_OPT_NAME	,
		false	,
		false
	)		const &

Definition at line 202 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	ARMPreAllocLoadStoreOpt	,
		"arm-prera-ldst-opt"	,
		ARM_PREALLOC_LOAD_STORE_OPT_NAME	,
		false	,
		false
	)

◆ InsertLDR_STR()

static void InsertLDR_STR	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator &	MBBI,
		int	Offset,
		bool	isDef,
		unsigned	NewOpc,
		unsigned	Reg,
		bool	RegDeadKill,
		bool	RegUndef,
		unsigned	BaseReg,
		bool	BaseKill,
		bool	BaseUndef,
		ARMCC::CondCodes	Pred,
		unsigned	PredReg,
		const TargetInstrInfo *	TII,
		MachineInstr *	MI
	)

static

Definition at line 1731 of file ARMLoadStoreOptimizer.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineInstrBuilder::cloneMemRefs(), llvm::getDeadRegState(), llvm::getDefRegState(), llvm::getKillRegState(), llvm::getUndefRegState(), MBB, MBBI, MI, llvm::Offset, and TII.

◆ InstReorderLimit()

arm prera ldst static false cl::opt< unsigned > InstReorderLimit	(	"arm-prera-ldst-opt-reorder-limit"	,
		cl::init(8)	,
		cl::Hidden
	)

static

References AssumeMisalignedLoadStores, Modified, MRI, TII, and TRI.

◆ isi32Load()

static bool isi32Load ( unsigned Opc )

static

Definition at line 401 of file ARMLoadStoreOptimizer.cpp.

References isT1i32Load(), and isT2i32Load().

Referenced by isLoadSingle(), and mayCombineMisaligned().

◆ isi32Store()

static bool isi32Store ( unsigned Opc )

static

Definition at line 413 of file ARMLoadStoreOptimizer.cpp.

References isT1i32Store(), and isT2i32Store().

Referenced by mayCombineMisaligned().

◆ isIncrementOrDecrement()

static int isIncrementOrDecrement	(	const MachineInstr &	MI,
		Register	Reg,
		ARMCC::CondCodes	Pred,
		Register	PredReg
	)

static

Check if the given instruction increments or decrements a register and return the amount it is incremented/decremented.

Returns 0 if the CPSR flags generated by the instruction are possibly read as well.

Definition at line 1189 of file ARMLoadStoreOptimizer.cpp.

References llvm::getInstrPredicate(), and MI.

Referenced by findIncDecAfter(), and findIncDecBefore().

◆ isLegalOrConvertableAddressImm()

static bool isLegalOrConvertableAddressImm	(	unsigned	Opcode,
		int	Imm,
		const TargetInstrInfo *	TII,
		int &	CodesizeEstimate
	)

static

Definition at line 2990 of file ARMLoadStoreOptimizer.cpp.

References llvm::ARMII::AddrModeMask, llvm::ARMII::AddrModeT2_i12, llvm::isLegalAddressImm(), and TII.

◆ isLoadSingle()

static bool isLoadSingle ( unsigned Opc )

static

Definition at line 417 of file ARMLoadStoreOptimizer.cpp.

References isi32Load().

◆ isMemoryOp()

static bool isMemoryOp ( const MachineInstr & MI )

static

Returns true if instruction is a memory operation that this pass is capable of operating on.

Definition at line 1676 of file ARMLoadStoreOptimizer.cpp.

References llvm::MachineMemOperand::getAlign(), llvm::MachineMemOperand::isAtomic(), llvm::MachineMemOperand::isVolatile(), and MI.

◆ isPostIndex()

static bool isPostIndex ( MachineInstr & MI )

static

Definition at line 2941 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ isPreIndex()

static bool isPreIndex ( MachineInstr & MI )

static

Definition at line 2963 of file ARMLoadStoreOptimizer.cpp.

References MI.

◆ IsSafeAndProfitableToMove()

static bool IsSafeAndProfitableToMove	(	bool	isLd,
		unsigned	Base,
		MachineBasicBlock::iterator	I,
		MachineBasicBlock::iterator	E,
		SmallPtrSetImpl< MachineInstr * > &	MemOps,
		SmallSet< unsigned, 4 > &	MemRegs,
		const TargetRegisterInfo *	TRI,
		AliasAnalysis *	AA
	)

static

Definition at line 2216 of file ARMLoadStoreOptimizer.cpp.

References llvm::sampleprof::Base, llvm::SmallSet< T, N, C >::count(), llvm::SmallPtrSetImpl< PtrType >::count(), llvm::MachineOperand::getReg(), I, llvm::SmallSet< T, N, C >::insert(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isReg(), llvm::SmallSet< T, N, C >::size(), and TRI.

◆ isT1i32Load()

static bool isT1i32Load ( unsigned Opc )

static

Definition at line 393 of file ARMLoadStoreOptimizer.cpp.

Referenced by isi32Load().

◆ isT1i32Store()

static bool isT1i32Store ( unsigned Opc )

static

Definition at line 405 of file ARMLoadStoreOptimizer.cpp.

Referenced by isi32Store().

◆ isT2i32Load()

static bool isT2i32Load ( unsigned Opc )

static

Definition at line 397 of file ARMLoadStoreOptimizer.cpp.

Referenced by isi32Load().

◆ isT2i32Store()

static bool isT2i32Store ( unsigned Opc )

static

Definition at line 409 of file ARMLoadStoreOptimizer.cpp.

Referenced by isi32Store().

◆ isValidLSDoubleOffset()

static bool isValidLSDoubleOffset ( int Offset )

static

Definition at line 977 of file ARMLoadStoreOptimizer.cpp.

References llvm::abs(), and llvm::Offset.

◆ mayCombineMisaligned()

static bool mayCombineMisaligned	(	const TargetSubtargetInfo &	STI,
		const MachineInstr &	MI
	)

static

Return true for loads/stores that can be combined to a double/multi operation without increasing the requirements for alignment.

Definition at line 986 of file ARMLoadStoreOptimizer.cpp.

References llvm::TargetSubtargetInfo::getFrameLowering(), getLoadStoreBaseOp(), getReg(), llvm::TargetFrameLowering::getTransientStackAlign(), isi32Load(), isi32Store(), and MI.

◆ STATISTIC() [1/11]

STATISTIC	(	NumLDMGened	,
		"Number of ldm instructions generated"
	)

◆ STATISTIC() [2/11]

STATISTIC	(	NumLDRD2LDM	,
		"Number of ldrd instructions turned back into ldm"
	)

◆ STATISTIC() [3/11]

STATISTIC	(	NumLDRD2LDR	,
		"Number of ldrd instructions turned back into ldr's"
	)

◆ STATISTIC() [4/11]

STATISTIC	(	NumLDRDFormed	,
		"Number of ldrd created before allocation"
	)

◆ STATISTIC() [5/11]

STATISTIC	(	NumLdStMoved	,
		"Number of load / store instructions moved"
	)

◆ STATISTIC() [6/11]

STATISTIC	(	NumSTMGened	,
		"Number of stm instructions generated"
	)

◆ STATISTIC() [7/11]

STATISTIC	(	NumSTRD2STM	,
		"Number of strd instructions turned back into stm"
	)

◆ STATISTIC() [8/11]

STATISTIC	(	NumSTRD2STR	,
		"Number of strd instructions turned back into str's"
	)

◆ STATISTIC() [9/11]

STATISTIC	(	NumSTRDFormed	,
		"Number of strd created before allocation"
	)

◆ STATISTIC() [10/11]

STATISTIC	(	NumVLDMGened	,
		"Number of vldm instructions generated"
	)

◆ STATISTIC() [11/11]

STATISTIC	(	NumVSTMGened	,
		"Number of vstm instructions generated"
	)

◆ updateRegisterMapForDbgValueListAfterMove()

static void updateRegisterMapForDbgValueListAfterMove	(	SmallDenseMap< Register, SmallVector< MachineInstr * >, 8 > &	RegisterMap,
		MachineInstr *	DbgValueListInstr,
		MachineInstr *	InstrToReplace
	)

static

Definition at line 2509 of file ARMLoadStoreOptimizer.cpp.

References forEachDbgRegOperand(), if(), and llvm::replace().

Variable Documentation

◆ ARM_PREALLOC_LOAD_STORE_OPT_NAME

arm prera ldst ARM_PREALLOC_LOAD_STORE_OPT_NAME

Definition at line 2189 of file ARMLoadStoreOptimizer.cpp.

◆ AssumeMisalignedLoadStores

cl::opt< bool > AssumeMisalignedLoadStores("arm-assume-misaligned-load-store", cl::Hidden, cl::init(false), cl::desc("Be more conservative in ARM load/store opt"))	(	"arm-assume-misaligned-load-store"	,
		cl::Hidden	,
		cl::init(false)	,
		cl::desc("Be more conservative in ARM load/store opt")
	)

static

This switch disables formation of double/multi instructions that could potentially lead to (new) alignment traps even with CCR.UNALIGN_TRP disabled.

This can be used to create libraries that are robust even when users provoke undefined behaviour by supplying misaligned pointers.

See also: mayCombineMisaligned()

Referenced by InstReorderLimit().

◆ false

arm prera ldst false

Definition at line 2189 of file ARMLoadStoreOptimizer.cpp.

◆ opt

arm prera ldst opt

Definition at line 2188 of file ARMLoadStoreOptimizer.cpp.

Referenced by llvm::lto::backend(), llvm::LTOCodeGenerator::optimize(), and llvm::lto::thinBackend().

Macros

Functions

Variables

Macro Definition Documentation

◆ ARM_LOAD_STORE_OPT_NAME

◆ ARM_PREALLOC_LOAD_STORE_OPT_NAME

◆ DEBUG_TYPE

Function Documentation

◆ AdjustBaseAndOffset()

◆ ContainsReg()

◆ createDebugVariableFromMachineInstr()

◆ createPostIncLoadStore()

◆ findIncDecAfter()

◆ findIncDecBefore()

◆ forEachDbgRegOperand()

◆ getBaseOperandIndex()

◆ getImmScale()

◆ getLoadStoreBaseOp()

◆ getLoadStoreMultipleOpcode()

◆ getLoadStoreMultipleSubMode()

◆ getLoadStoreRegOp()

◆ getLSMultipleTransferSize()

◆ getMemoryOpOffset()

◆ getPostIndexedLoadStoreOpcode()

◆ getPreIndexedLoadStoreOpcode()

◆ getUpdatingLSMultipleOpcode()

◆ INITIALIZE_PASS()

◆ INITIALIZE_PASS_BEGIN()

◆ InsertLDR_STR()

◆ InstReorderLimit()

◆ isi32Load()

◆ isi32Store()

◆ isIncrementOrDecrement()

◆ isLegalOrConvertableAddressImm()

◆ isLoadSingle()

◆ isMemoryOp()

◆ isPostIndex()

◆ isPreIndex()

◆ IsSafeAndProfitableToMove()

◆ isT1i32Load()

◆ isT1i32Store()

◆ isT2i32Load()

◆ isT2i32Store()

◆ isValidLSDoubleOffset()

◆ mayCombineMisaligned()

◆ STATISTIC() [1/11]

◆ STATISTIC() [2/11]

◆ STATISTIC() [3/11]

◆ STATISTIC() [4/11]

◆ STATISTIC() [5/11]

◆ STATISTIC() [6/11]

◆ STATISTIC() [7/11]

◆ STATISTIC() [8/11]

◆ STATISTIC() [9/11]

◆ STATISTIC() [10/11]

◆ STATISTIC() [11/11]

◆ updateRegisterMapForDbgValueListAfterMove()

Variable Documentation

◆ ARM_PREALLOC_LOAD_STORE_OPT_NAME

◆ AssumeMisalignedLoadStores

◆ false

◆ opt