AArch64LoadStoreOptimizer.cpp File Reference

#include "AArch64InstrInfo.h"
#include "AArch64Subtarget.h"
#include "MCTargetDesc/AArch64AddressingModes.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"

Include dependency graph for AArch64LoadStoreOptimizer.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "aarch64-ldst-opt"
Functions
	STATISTIC (NumPairCreated,"Number of load/store pair instructions generated")
	STATISTIC (NumPostFolded,"Number of post-index updates folded")
	STATISTIC (NumPreFolded,"Number of pre-index updates folded")
	STATISTIC (NumUnscaledPairCreated,"Number of load/store from unscaled generated")
static bool	isUnscaledLdst (unsigned Opc)
static unsigned	getMatchingPairOpcode (unsigned Opc)
static unsigned	getPreIndexedOpcode (unsigned Opc)
static unsigned	getPostIndexedOpcode (unsigned Opc)
static void	trackRegDefsUses (MachineInstr *MI, BitVector &ModifiedRegs, BitVector &UsedRegs, const TargetRegisterInfo *TRI)
static bool	inBoundsForPair (bool IsUnscaled, int Offset, int OffsetStride)
static int	alignTo (int Num, int PowOf2)
static bool	isMatchingUpdateInsn (MachineInstr *MI, unsigned BaseReg, int Offset)
Variables
static cl::opt< unsigned >	ScanLimit ("aarch64-load-store-scan-limit", cl::init(20), cl::Hidden)
static cl::opt< bool >	EnableAArch64UnscaledMemOp ("aarch64-unscaled-mem-op", cl::Hidden, cl::desc("Allow AArch64 unscaled load/store combining"), cl::init(true))

---

Define Documentation

#define DEBUG_TYPE   "aarch64-ldst-opt"

Definition at line 33 of file AArch64LoadStoreOptimizer.cpp.

---

Function Documentation

static int alignTo	(	int	Num,
		int	PowOf2
	)		[static]

Definition at line 379 of file AArch64LoadStoreOptimizer.cpp.

static unsigned getMatchingPairOpcode

(

unsigned

Opc

)

[static]

Definition at line 179 of file AArch64LoadStoreOptimizer.cpp.

References llvm_unreachable.

static unsigned getPostIndexedOpcode

(

unsigned

Opc

)

[static]

Definition at line 243 of file AArch64LoadStoreOptimizer.cpp.

References llvm_unreachable.

static unsigned getPreIndexedOpcode

(

unsigned

Opc

)

[static]

Definition at line 216 of file AArch64LoadStoreOptimizer.cpp.

References llvm_unreachable.

static bool inBoundsForPair	(	bool	IsUnscaled,
		int	Offset,
		int	OffsetStride
	)		[static]

Definition at line 362 of file AArch64LoadStoreOptimizer.cpp.

static bool isMatchingUpdateInsn	(	MachineInstr *	MI,
		unsigned	BaseReg,
		int	Offset
	)		[static]

Definition at line 607 of file AArch64LoadStoreOptimizer.cpp.

References llvm::MachineOperand::getImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::AArch64_AM::getShiftValue(), and llvm::MachineOperand::isImm().

static bool isUnscaledLdst

(

unsigned

Opc

)

[static]

Definition at line 114 of file AArch64LoadStoreOptimizer.cpp.

STATISTIC	(	NumPairCreated	,
		"Number of load/store pair instructions generated"
	)

AArch64AllocLoadStoreOpt - Post-register allocation pass to combine load / store instructions to form ldp / stp instructions.

STATISTIC	(	NumPostFolded	,
		"Number of post-index updates folded"
	)

STATISTIC	(	NumPreFolded	,
		"Number of pre-index updates folded"
	)

STATISTIC	(	NumUnscaledPairCreated	,
		"Number of load/store from unscaled generated"
	)

static void trackRegDefsUses	(	MachineInstr *	MI,
		BitVector &	ModifiedRegs,
		BitVector &	UsedRegs,
		const TargetRegisterInfo *	TRI
	)		[static]

trackRegDefsUses - Remember what registers the specified instruction uses and modifies.

Definition at line 340 of file AArch64LoadStoreOptimizer.cpp.

References llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineOperand::getRegMask(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isRegMask(), llvm::MachineOperand::isUse(), llvm::MCRegAliasIterator::isValid(), llvm::BitVector::set(), and llvm::BitVector::setBitsNotInMask().

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Variable Documentation

cl::opt<bool> EnableAArch64UnscaledMemOp("aarch64-unscaled-mem-op", cl::Hidden, cl::desc("Allow AArch64 unscaled load/store combining"), cl::init(true)) [static]

cl::opt<unsigned> ScanLimit("aarch64-load-store-scan-limit", cl::init(20), cl::Hidden) [static]