#include "llvm/CodeGen/ResourcePriorityQueue.h"

Inheritance diagram for llvm::ResourcePriorityQueue:

Public Member Functions
	ResourcePriorityQueue (SelectionDAGISel *IS)
	~ResourcePriorityQueue ()
bool	isBottomUp () const override
void	initNodes (std::vector< SUnit > &sunits) override
	Initialize nodes.
void	addNode (const SUnit *SU) override
void	updateNode (const SUnit *SU) override
void	releaseState () override
unsigned	getLatency (unsigned NodeNum) const
unsigned	getNumSolelyBlockNodes (unsigned NodeNum) const
int	SUSchedulingCost (SUnit *SU)
	Single cost function reflecting benefit of scheduling SU in the current cycle.
void	initNumRegDefsLeft (SUnit *SU)
	InitNumRegDefsLeft - Determine the # of regs defined by this node.
int	regPressureDelta (SUnit *SU, bool RawPressure=false)
	Estimates change in reg pressure from this SU.
int	rawRegPressureDelta (SUnit *SU, unsigned RCId)
bool	empty () const override
void	push (SUnit *U) override
SUnit *	pop () override
	Main access point - returns next instructions to be placed in scheduling sequence.
void	remove (SUnit *SU) override
void	scheduledNode (SUnit *SU) override
	scheduledNode - Main resource tracking point.
bool	isResourceAvailable (SUnit *SU)
	Check if scheduling of this SU is possible in the current packet.
void	reserveResources (SUnit *SU)
	Keep track of available resources.
Public Member Functions inherited from llvm::SchedulingPriorityQueue
	SchedulingPriorityQueue (bool rf=false)
virtual	~SchedulingPriorityQueue ()=default
bool	hasReadyFilter () const
virtual bool	tracksRegPressure () const
virtual bool	isReady (SUnit *) const
void	push_all (const std::vector< SUnit * > &Nodes)
virtual void	dump (ScheduleDAG *) const
virtual void	unscheduledNode (SUnit *)
void	setCurCycle (unsigned Cycle)
unsigned	getCurCycle () const

Detailed Description

Definition at line 37 of file ResourcePriorityQueue.h.

Constructor & Destructor Documentation

◆ ResourcePriorityQueue()

ResourcePriorityQueue::ResourcePriorityQueue ( SelectionDAGISel * IS )

Definition at line 43 of file ResourcePriorityQueue.cpp.

References assert(), llvm::fill(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::SelectionDAGISel::MF, and llvm::SelectionDAGISel::TLI.

◆ ~ResourcePriorityQueue()

ResourcePriorityQueue::~ResourcePriorityQueue ( )

default

Member Function Documentation

◆ addNode()

void llvm::ResourcePriorityQueue::addNode ( const SUnit * SU )

inlineoverridevirtual

Implements llvm::SchedulingPriorityQueue.

Definition at line 84 of file ResourcePriorityQueue.h.

◆ empty()

bool llvm::ResourcePriorityQueue::empty ( ) const

inlineoverridevirtual

Implements llvm::SchedulingPriorityQueue.

Definition at line 114 of file ResourcePriorityQueue.h.

Referenced by pop().

◆ getLatency()

unsigned llvm::ResourcePriorityQueue::getLatency ( unsigned NodeNum ) const

inline

Definition at line 94 of file ResourcePriorityQueue.h.

References assert().

◆ getNumSolelyBlockNodes()

unsigned llvm::ResourcePriorityQueue::getNumSolelyBlockNodes ( unsigned NodeNum ) const

inline

Definition at line 99 of file ResourcePriorityQueue.h.

References assert().

◆ initNodes()

void ResourcePriorityQueue::initNodes ( std::vector< SUnit > & sunits )

overridevirtual

Initialize nodes.

Implements llvm::SchedulingPriorityQueue.

Definition at line 165 of file ResourcePriorityQueue.cpp.

References initNumRegDefsLeft(), and llvm::SUnit::NodeQueueId.

◆ initNumRegDefsLeft()

void ResourcePriorityQueue::initNumRegDefsLeft ( SUnit * SU )

InitNumRegDefsLeft - Determine the # of regs defined by this node.

Definition at line 535 of file ResourcePriorityQueue.cpp.

References llvm::ISD::CopyFromReg, llvm::SUnit::getNode(), llvm::MCInstrDesc::getNumDefs(), N, and llvm::SUnit::NumRegDefsLeft.

Referenced by initNodes().

◆ isBottomUp()

bool llvm::ResourcePriorityQueue::isBottomUp ( ) const

inlineoverridevirtual

Implements llvm::SchedulingPriorityQueue.

Definition at line 80 of file ResourcePriorityQueue.h.

◆ isResourceAvailable()

bool ResourcePriorityQueue::isResourceAvailable ( SUnit * SU )

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

Definition at line 240 of file ResourcePriorityQueue.cpp.

References llvm::SDNode::getGluedNode(), llvm::SDNode::getMachineOpcode(), llvm::SUnit::getNode(), llvm::SDep::getSUnit(), llvm::SDep::isCtrl(), and llvm::SDNode::isMachineOpcode().

Referenced by reserveResources(), and SUSchedulingCost().

◆ pop()

SUnit * ResourcePriorityQueue::pop ( )

overridevirtual

Main access point - returns next instructions to be placed in scheduling sequence.

Implements llvm::SchedulingPriorityQueue.

Definition at line 587 of file ResourcePriorityQueue.cpp.

References DisableDFASched, empty(), I, SUSchedulingCost(), and std::swap().

◆ push()

void ResourcePriorityQueue::push ( SUnit * U )

overridevirtual

Implements llvm::SchedulingPriorityQueue.

Definition at line 226 of file ResourcePriorityQueue.cpp.

References llvm::SDep::getSUnit(), llvm::SUnit::NodeNum, and llvm::SUnit::Succs.

◆ rawRegPressureDelta()

int ResourcePriorityQueue::rawRegPressureDelta	(	SUnit *	SU,
		unsigned	RCId )

Definition at line 320 of file ResourcePriorityQueue.cpp.

References llvm::SUnit::getNode(), llvm::SDNode::getNumOperands(), llvm::SDNode::getNumValues(), llvm::SDNode::getOperand(), llvm::SDNode::getSimpleValueType(), llvm::isa(), and llvm::SDNode::isMachineOpcode().

Referenced by regPressureDelta().

◆ regPressureDelta()

int ResourcePriorityQueue::regPressureDelta	(	SUnit *	SU,
		bool	RawPressure = false )

Estimates change in reg pressure from this SU.

It is achieved by trivial tracking of defined and used vregs in dependent instructions. The RawPressure flag makes this function to ignore existing reg file sizes, and report raw def/use balance.

Definition at line 354 of file ResourcePriorityQueue.cpp.

References llvm::SUnit::getNode(), llvm::SDNode::isMachineOpcode(), and rawRegPressureDelta().

Referenced by SUSchedulingCost().