MachineLICM.cpp File Reference

#include "llvm/CodeGen/Passes.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/MC/MCInstrItineraries.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"

Include dependency graph for MachineLICM.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "machine-licm"
Functions
	STATISTIC (NumHoisted,"Number of machine instructions hoisted out of loops")
	STATISTIC (NumLowRP,"Number of instructions hoisted in low reg pressure situation")
	STATISTIC (NumHighLatency,"Number of high latency instructions hoisted")
	STATISTIC (NumCSEed,"Number of hoisted machine instructions CSEed")
	STATISTIC (NumPostRAHoisted,"Number of machine instructions hoisted out of loops post regalloc")
	INITIALIZE_PASS_BEGIN (MachineLICM,"machinelicm","Machine Loop Invariant Code Motion", false, false) INITIALIZE_PASS_END(MachineLICM
Machine Loop Invariant Code static false bool	LoopIsOuterMostWithPredecessor (MachineLoop *CurLoop)
static bool	InstructionStoresToFI (const MachineInstr *MI, int FI)
static bool	isOperandKill (const MachineOperand &MO, MachineRegisterInfo *MRI)
static bool	isLoadFromGOTOrConstantPool (MachineInstr &MI)
Variables
static cl::opt< bool >	AvoidSpeculation ("avoid-speculation", cl::desc("MachineLICM should avoid speculation"), cl::init(true), cl::Hidden)
	machinelicm
Machine Loop Invariant Code	Motion
Machine Loop Invariant Code	false

---

Define Documentation

#define DEBUG_TYPE   "machine-licm"

Definition at line 45 of file MachineLICM.cpp.

---

Function Documentation

INITIALIZE_PASS_BEGIN	(	MachineLICM	,
		"machinelicm"	,
		"Machine Loop Invariant Code Motion"	,
		false	,
		false
	)

static bool InstructionStoresToFI	(	const MachineInstr *	MI,
		int	FI
	)		[static]

InstructionStoresToFI - Return true if instruction stores to the specified frame.

Definition at line 392 of file MachineLICM.cpp.

References llvm::MachineInstr::memoperands_begin(), and llvm::MachineInstr::memoperands_end().

static bool isLoadFromGOTOrConstantPool

(

MachineInstr &

MI

)

[static]

isLoadFromGOTOrConstantPool - Return true if this machine instruction loads from global offset table or constant pool.

Definition at line 883 of file MachineLICM.cpp.

References I, llvm::MachineInstr::mayLoad(), llvm::MachineInstr::memoperands_begin(), and llvm::MachineInstr::memoperands_end().

static bool isOperandKill	(	const MachineOperand &	MO,
		MachineRegisterInfo *	MRI
	)		[static]

Definition at line 777 of file MachineLICM.cpp.

References llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), and llvm::MachineOperand::isKill().

Machine Loop Invariant Code static false bool LoopIsOuterMostWithPredecessor

(

MachineLoop *

CurLoop

)

[static]

LoopIsOuterMostWithPredecessor - Test if the given loop is the outer-most loop that has a unique predecessor.

Definition at line 311 of file MachineLICM.cpp.

References llvm::LoopBase< BlockT, LoopT >::getParentLoop().

STATISTIC	(	NumHoisted	,
		"Number of machine instructions hoisted out of loops"
	)

STATISTIC	(	NumLowRP	,
		"Number of instructions hoisted in low reg pressure situation"
	)

STATISTIC	(	NumHighLatency	,
		"Number of high latency instructions hoisted"
	)

STATISTIC	(	NumCSEed	,
		"Number of hoisted machine instructions CSEed"
	)

STATISTIC	(	NumPostRAHoisted	,
		"Number of machine instructions hoisted out of loops post regalloc"
	)

---

Variable Documentation

cl::opt<bool> AvoidSpeculation("avoid-speculation", cl::desc("MachineLICM should avoid speculation"), cl::init(true), cl::Hidden) [static]

Machine Loop Invariant Code false

Definition at line 306 of file MachineLICM.cpp.

machinelicm

Definition at line 306 of file MachineLICM.cpp.

Machine Loop Invariant Code Motion

Definition at line 306 of file MachineLICM.cpp.