LLVM: llvm::VLIWResourceModel Class Reference

LLVM 20.0.0git

#include "llvm/CodeGen/VLIWMachineScheduler.h"

Inheritance diagram for llvm::VLIWResourceModel:

Inheritance graph

[legend]

Public Member Functions
	VLIWResourceModel (const TargetSubtargetInfo &STI, const TargetSchedModel *SM)

VLIWResourceModel &	operator= (const VLIWResourceModel &other)=delete

	VLIWResourceModel (const VLIWResourceModel &other)=delete

virtual	~VLIWResourceModel ()

virtual void	reset ()

virtual bool	hasDependence (const SUnit SUd, const SUnit SUu)
	Return true if there is a dependence between SUd and SUu.

virtual bool	isResourceAvailable (SUnit *SU, bool IsTop)
	Check if scheduling of this SU is possible in the current packet.

virtual bool	reserveResources (SUnit *SU, bool IsTop)
	Keep track of available resources.

unsigned	getTotalPackets () const

size_t	getPacketInstCount () const

bool	isInPacket (SUnit *SU) const

Protected Member Functions
virtual DFAPacketizer *	createPacketizer (const TargetSubtargetInfo &STI) const

Protected Attributes
const TargetInstrInfo *	TII

DFAPacketizer *	ResourcesModel
	ResourcesModel - Represents VLIW state.

const TargetSchedModel *	SchedModel

SmallVector< SUnit * >	Packet
	Local packet/bundle model.

unsigned	TotalPackets = 0
	Total packets created.

Detailed Description

Definition at line 31 of file VLIWMachineScheduler.h.

Constructor & Destructor Documentation

◆ VLIWResourceModel() [1/2]

VLIWResourceModel::VLIWResourceModel	(	const TargetSubtargetInfo &	STI,
		const TargetSchedModel *	SM
	)

Definition at line 65 of file VLIWMachineScheduler.cpp.

References assert(), llvm::DFAPacketizer::clearResources(), createPacketizer(), llvm::TargetSchedModel::getIssueWidth(), Packet, ResourcesModel, and SchedModel.

◆ VLIWResourceModel() [2/2]

llvm::VLIWResourceModel::VLIWResourceModel ( const VLIWResourceModel & other )

delete

◆ ~VLIWResourceModel()

VLIWResourceModel::~VLIWResourceModel ( )

virtual

Definition at line 84 of file VLIWMachineScheduler.cpp.

References ResourcesModel.

Member Function Documentation

◆ createPacketizer()

DFAPacketizer * VLIWResourceModel::createPacketizer ( const TargetSubtargetInfo & STI ) const

protectedvirtual

Definition at line 194 of file VLIWMachineScheduler.cpp.

References llvm::TargetInstrInfo::CreateTargetScheduleState(), and llvm::TargetSubtargetInfo::getInstrInfo().

Referenced by VLIWResourceModel().

◆ getPacketInstCount()

size_t llvm::VLIWResourceModel::getPacketInstCount ( ) const

inline

Definition at line 61 of file VLIWMachineScheduler.h.

References Packet.

◆ getTotalPackets()

unsigned llvm::VLIWResourceModel::getTotalPackets ( ) const

inline

Definition at line 60 of file VLIWMachineScheduler.h.

References TotalPackets.

Referenced by llvm::ConvergingVLIWScheduler::reportPackets().

◆ hasDependence()

bool VLIWResourceModel::hasDependence	(	const SUnit *	SUd,
		const SUnit *	SUu
	)

virtual

Return true if there is a dependence between SUd and SUu.

Reimplemented in llvm::HexagonVLIWResourceModel.

Definition at line 87 of file VLIWMachineScheduler.cpp.

References llvm::SUnit::Succs.

Referenced by llvm::HexagonVLIWResourceModel::hasDependence(), and isResourceAvailable().

◆ isInPacket()

bool llvm::VLIWResourceModel::isInPacket ( SUnit * SU ) const

inline

Definition at line 62 of file VLIWMachineScheduler.h.

References llvm::is_contained(), and Packet.

Referenced by llvm::ConvergingVLIWScheduler::SchedulingCost().

◆ isResourceAvailable()

bool VLIWResourceModel::isResourceAvailable	(	SUnit *	SU,
		bool	IsTop
	)

virtual

Check if scheduling of this SU is possible in the current packet.

It is not precise (statefull), it is more like another heuristic. Many corner cases are figured empirically.

Definition at line 108 of file VLIWMachineScheduler.cpp.

References llvm::DFAPacketizer::canReserveResources(), llvm::SUnit::getInstr(), llvm::MachineInstr::getOpcode(), hasDependence(), Packet, and ResourcesModel.

Referenced by reserveResources(), llvm::ConvergingVLIWScheduler::SchedulingCost(), and llvm::HexagonConvergingVLIWScheduler::SchedulingCost().

◆ operator=()

VLIWResourceModel & llvm::VLIWResourceModel::operator= ( const VLIWResourceModel & other )

delete

◆ reserveResources()

bool VLIWResourceModel::reserveResources	(	SUnit *	SU,
		bool	IsTop
	)

virtual

Keep track of available resources.

Definition at line 145 of file VLIWMachineScheduler.cpp.

References llvm::dbgs(), llvm::dump(), llvm::SUnit::getInstr(), llvm::TargetSchedModel::getIssueWidth(), llvm::MachineInstr::getOpcode(), isResourceAvailable(), LLVM_DEBUG, Packet, llvm::DFAPacketizer::reserveResources(), reset(), ResourcesModel, SchedModel, and TotalPackets.

◆ reset()

void VLIWResourceModel::reset ( )

virtual

Definition at line 79 of file VLIWMachineScheduler.cpp.

References llvm::DFAPacketizer::clearResources(), Packet, and ResourcesModel.

Referenced by reserveResources().

Member Data Documentation

◆ Packet

SmallVector<SUnit *> llvm::VLIWResourceModel::Packet

protected

Local packet/bundle model.

Purely internal to the MI scheduler at the time.

Definition at line 44 of file VLIWMachineScheduler.h.

Referenced by getPacketInstCount(), isInPacket(), isResourceAvailable(), reserveResources(), reset(), and VLIWResourceModel().

◆ ResourcesModel

DFAPacketizer* llvm::VLIWResourceModel::ResourcesModel

protected

ResourcesModel - Represents VLIW state.

Not limited to VLIW targets per se, but assumes definition of resource model by a target.

Definition at line 38 of file VLIWMachineScheduler.h.

Referenced by isResourceAvailable(), reserveResources(), reset(), VLIWResourceModel(), and ~VLIWResourceModel().

◆ SchedModel

const TargetSchedModel* llvm::VLIWResourceModel::SchedModel

protected

Definition at line 40 of file VLIWMachineScheduler.h.

Referenced by reserveResources(), and VLIWResourceModel().

◆ TII

const TargetInstrInfo* llvm::VLIWResourceModel::TII

protected

Definition at line 33 of file VLIWMachineScheduler.h.

Referenced by llvm::HexagonVLIWResourceModel::hasDependence().

◆ TotalPackets

unsigned llvm::VLIWResourceModel::TotalPackets = 0

protected

Total packets created.

Definition at line 47 of file VLIWMachineScheduler.h.

Referenced by getTotalPackets(), and reserveResources().

The documentation for this class was generated from the following files:

include/llvm/CodeGen/VLIWMachineScheduler.h
lib/CodeGen/VLIWMachineScheduler.cpp