#include "CodeGen/RegAllocGreedy.h"

Inheritance diagram for llvm::RAGreedy:

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Classes
class	ExtraRegInfo
	Track allocation stage and eviction loop prevention during allocation. More...

Public Member Functions
LiveRegMatrix *	getInterferenceMatrix () const

LiveIntervals *	getLiveIntervals () const

VirtRegMap *	getVirtRegMap () const

const RegisterClassInfo &	getRegClassInfo () const

const ExtraRegInfo &	getExtraInfo () const

size_t	getQueueSize () const

bool	getRegClassPriorityTrumpsGlobalness () const

bool	getReverseLocalAssignment () const

	RAGreedy (const RegClassFilterFunc F=allocateAllRegClasses)

StringRef	getPassName () const override
	Return the pass name.

void	getAnalysisUsage (AnalysisUsage &AU) const override
	RAGreedy analysis usage.

void	releaseMemory () override
	releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed.

Spiller &	spiller () override

void	enqueueImpl (const LiveInterval *LI) override
	enqueue - Add VirtReg to the priority queue of unassigned registers.

const LiveInterval *	dequeue () override
	dequeue - Return the next unassigned register, or NULL.

MCRegister	selectOrSplit (const LiveInterval &, SmallVectorImpl< Register > &) override

void	aboutToRemoveInterval (const LiveInterval &) override
	Method called when the allocator is about to remove a LiveInterval.

bool	runOnMachineFunction (MachineFunction &mf) override
	Perform register allocation.

MachineFunctionProperties	getRequiredProperties () const override

MachineFunctionProperties	getClearedProperties () const override

Public Member Functions inherited from llvm::MachineFunctionPass
bool	doInitialization (Module &) override
	doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run.

Public Member Functions inherited from llvm::FunctionPass
	FunctionPass (char &pid)

Pass *	createPrinterPass (raw_ostream &OS, const std::string &Banner) const override
	createPrinterPass - Get a function printer pass.

virtual bool	runOnFunction (Function &F)=0
	runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.

void	assignPassManager (PMStack &PMS, PassManagerType T) override
	Find appropriate Function Pass Manager or Call Graph Pass Manager in the PM Stack and add self into that manager.

PassManagerType	getPotentialPassManagerType () const override
	Return what kind of Pass Manager can manage this pass.

Public Member Functions inherited from llvm::Pass
	Pass (PassKind K, char &pid)

	Pass (const Pass &)=delete

Pass &	operator= (const Pass &)=delete

virtual	~Pass ()

PassKind	getPassKind () const

virtual StringRef	getPassName () const
	getPassName - Return a nice clean name for a pass.

AnalysisID	getPassID () const
	getPassID - Return the PassID number that corresponds to this pass.

virtual bool	doInitialization (Module &)
	doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run.

virtual bool	doFinalization (Module &)
	doFinalization - Virtual method overriden by subclasses to do any necessary clean up after all passes have run.

virtual void	print (raw_ostream &OS, const Module *M) const
	print - Print out the internal state of the pass.

void	dump () const

virtual Pass *	createPrinterPass (raw_ostream &OS, const std::string &Banner) const =0
	createPrinterPass - Get a Pass appropriate to print the IR this pass operates on (Module, Function or MachineFunction).

virtual void	assignPassManager (PMStack &, PassManagerType)
	Each pass is responsible for assigning a pass manager to itself.

virtual void	preparePassManager (PMStack &)
	Check if available pass managers are suitable for this pass or not.

virtual PassManagerType	getPotentialPassManagerType () const
	Return what kind of Pass Manager can manage this pass.

void	setResolver (AnalysisResolver *AR)

AnalysisResolver *	getResolver () const

virtual void	getAnalysisUsage (AnalysisUsage &) const
	getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.

virtual void	releaseMemory ()
	releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed.

virtual void *	getAdjustedAnalysisPointer (AnalysisID ID)
	getAdjustedAnalysisPointer - This method is used when a pass implements an analysis interface through multiple inheritance.

virtual ImmutablePass *	getAsImmutablePass ()

virtual PMDataManager *	getAsPMDataManager ()

virtual void	verifyAnalysis () const
	verifyAnalysis() - This member can be implemented by a analysis pass to check state of analysis information.

virtual void	dumpPassStructure (unsigned Offset=0)

template<typename AnalysisType >
AnalysisType *	getAnalysisIfAvailable () const
	getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to get analysis information that might be around, for example to update it.

bool	mustPreserveAnalysisID (char &AID) const
	mustPreserveAnalysisID - This method serves the same function as getAnalysisIfAvailable, but works if you just have an AnalysisID.

template<typename AnalysisType >
AnalysisType &	getAnalysis () const
	getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.

template<typename AnalysisType >
AnalysisType &	getAnalysis (Function &F, bool *Changed=nullptr)
	getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function.

template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI) const

template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI, Function &F, bool *Changed=nullptr)

Static Public Attributes
static char	ID = 0

Static Public Attributes inherited from llvm::RegAllocBase
static bool	VerifyEnabled = false
	VerifyEnabled - True when -verify-regalloc is given.

Additional Inherited Members
Static Public Member Functions inherited from llvm::Pass
static const PassInfo *	lookupPassInfo (const void *TI)

static const PassInfo *	lookupPassInfo (StringRef Arg)

static Pass *	createPass (AnalysisID ID)

Protected Member Functions inherited from llvm::MachineFunctionPass
	MachineFunctionPass (char &ID)

virtual bool	runOnMachineFunction (MachineFunction &MF)=0
	runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.

void	getAnalysisUsage (AnalysisUsage &AU) const override
	getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.

virtual MachineFunctionProperties	getRequiredProperties () const

virtual MachineFunctionProperties	getSetProperties () const

virtual MachineFunctionProperties	getClearedProperties () const

Protected Member Functions inherited from llvm::FunctionPass
bool	skipFunction (const Function &F) const
	Optional passes call this function to check whether the pass should be skipped.

Protected Member Functions inherited from llvm::RegAllocBase
	RegAllocBase (const RegClassFilterFunc F=allocateAllRegClasses)

virtual	~RegAllocBase ()=default

void	init (VirtRegMap &vrm, LiveIntervals &lis, LiveRegMatrix &mat)

void	allocatePhysRegs ()

virtual void	postOptimization ()

virtual Spiller &	spiller ()=0

virtual void	enqueueImpl (const LiveInterval *LI)=0
	enqueue - Add VirtReg to the priority queue of unassigned registers.

void	enqueue (const LiveInterval *LI)
	enqueue - Add VirtReg to the priority queue of unassigned registers.

virtual const LiveInterval *	dequeue ()=0
	dequeue - Return the next unassigned register, or NULL.

virtual MCRegister	selectOrSplit (const LiveInterval &VirtReg, SmallVectorImpl< Register > &splitLVRs)=0

virtual void	aboutToRemoveInterval (const LiveInterval &LI)
	Method called when the allocator is about to remove a LiveInterval.

Protected Attributes inherited from llvm::RegAllocBase
const TargetRegisterInfo *	TRI = nullptr

MachineRegisterInfo *	MRI = nullptr

VirtRegMap *	VRM = nullptr

LiveIntervals *	LIS = nullptr

LiveRegMatrix *	Matrix = nullptr

RegisterClassInfo	RegClassInfo

const RegClassFilterFunc	ShouldAllocateClass

SmallPtrSet< MachineInstr *, 32 >	DeadRemats
	Inst which is a def of an original reg and whose defs are already all dead after remat is saved in DeadRemats.

Static Protected Attributes inherited from llvm::RegAllocBase
static const char	TimerGroupName [] = "regalloc"

static const char	TimerGroupDescription [] = "Register Allocation"

Detailed Description

Definition at line 61 of file RegAllocGreedy.h.

Constructor & Destructor Documentation

◆ RAGreedy()

RAGreedy::RAGreedy ( const RegClassFilterFunc F = allocateAllRegClasses )

Definition at line 200 of file RegAllocGreedy.cpp.

Member Function Documentation

◆ aboutToRemoveInterval()

void RAGreedy::aboutToRemoveInterval ( const LiveInterval & LI )

overridevirtual

Method called when the allocator is about to remove a LiveInterval.

Reimplemented from llvm::RegAllocBase.

Definition at line 2182 of file RegAllocGreedy.cpp.

◆ dequeue()

const LiveInterval * RAGreedy::dequeue ( )

overridevirtual

dequeue - Return the next unassigned register, or NULL.

Implements llvm::RegAllocBase.

Definition at line 385 of file RegAllocGreedy.cpp.

References dequeue().

Referenced by dequeue().

◆ enqueueImpl()

void RAGreedy::enqueueImpl ( const LiveInterval * LI )

overridevirtual

enqueue - Add VirtReg to the priority queue of unassigned registers.

Implements llvm::RegAllocBase.

Definition at line 285 of file RegAllocGreedy.cpp.

◆ getAnalysisUsage()

void RAGreedy::getAnalysisUsage ( AnalysisUsage & AU ) const

overridevirtual

RAGreedy analysis usage.

Reimplemented from llvm::MachineFunctionPass.

Definition at line 205 of file RegAllocGreedy.cpp.

References llvm::AnalysisUsage::addPreserved(), llvm::AnalysisUsage::addRequired(), llvm::MachineFunctionPass::getAnalysisUsage(), and llvm::AnalysisUsage::setPreservesCFG().

◆ getClearedProperties()

MachineFunctionProperties llvm::RAGreedy::getClearedProperties ( ) const

inlineoverridevirtual

Reimplemented from llvm::MachineFunctionPass.

Definition at line 309 of file RegAllocGreedy.h.

References llvm::MachineFunctionProperties::set().

◆ getExtraInfo()

const ExtraRegInfo & llvm::RAGreedy::getExtraInfo ( ) const

inline

Definition at line 147 of file RegAllocGreedy.h.

Referenced by llvm::MLPriorityAdvisor::getPriorityImpl().

◆ getInterferenceMatrix()

LiveRegMatrix * llvm::RAGreedy::getInterferenceMatrix ( ) const

inline

Definition at line 143 of file RegAllocGreedy.h.

References Matrix.

◆ getLiveIntervals()

LiveIntervals * llvm::RAGreedy::getLiveIntervals ( ) const

inline

Definition at line 144 of file RegAllocGreedy.h.

◆ getPassName()

StringRef llvm::RAGreedy::getPassName ( ) const

inlineoverridevirtual

Return the pass name.

Reimplemented from llvm::Pass.

Definition at line 289 of file RegAllocGreedy.h.

◆ getQueueSize()

size_t llvm::RAGreedy::getQueueSize ( ) const

inline

Definition at line 148 of file RegAllocGreedy.h.

◆ getRegClassInfo()

const RegisterClassInfo & llvm::RAGreedy::getRegClassInfo ( ) const

inline

Definition at line 146 of file RegAllocGreedy.h.

◆ getRegClassPriorityTrumpsGlobalness()

bool llvm::RAGreedy::getRegClassPriorityTrumpsGlobalness ( ) const

inline

Definition at line 152 of file RegAllocGreedy.h.

◆ getRequiredProperties()

MachineFunctionProperties llvm::RAGreedy::getRequiredProperties ( ) const

inlineoverridevirtual

Reimplemented from llvm::MachineFunctionPass.

Definition at line 304 of file RegAllocGreedy.h.

References llvm::MachineFunctionProperties::set().

◆ getReverseLocalAssignment()

bool llvm::RAGreedy::getReverseLocalAssignment ( ) const

inline

Definition at line 155 of file RegAllocGreedy.h.

◆ getVirtRegMap()

VirtRegMap * llvm::RAGreedy::getVirtRegMap ( ) const

inline

Definition at line 145 of file RegAllocGreedy.h.

◆ releaseMemory()

void RAGreedy::releaseMemory ( )

overridevirtual

releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed.

The default behavior of passes is to hold onto memory for the entire duration of their lifetime (which is the entire compile time). For pipelined passes, this is not a big deal because that memory gets recycled every time the pass is invoked on another program unit. For IP passes, it is more important to free memory when it is unused.

Optionally implement this function to release pass memory when it is no longer used.

Reimplemented from llvm::Pass.

Definition at line 280 of file RegAllocGreedy.cpp.

References llvm::SmallVectorImpl< T >::clear().

Referenced by runOnMachineFunction().