LLVM: llvm::SystemZPostRASchedStrategy Class Reference

LLVM 8.0.1

A MachineSchedStrategy implementation for SystemZ post RA scheduling. More...

#include "Target/SystemZ/SystemZMachineScheduler.h"

Inheritance diagram for llvm::SystemZPostRASchedStrategy:

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Public Member Functions
	SystemZPostRASchedStrategy (const MachineSchedContext *C)

virtual	~SystemZPostRASchedStrategy ()

void	initPolicy (MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned NumRegionInstrs) override
	Called for a region before scheduling. More...

bool	shouldTrackPressure () const override
	PostRA scheduling does not track pressure. More...

bool	doMBBSchedRegionsTopDown () const override

void	initialize (ScheduleDAGMI *dag) override
	Initialize the strategy after building the DAG for a new region. More...

void	enterMBB (MachineBasicBlock *NextMBB) override
	Tell the strategy that MBB is about to be processed. More...

void	leaveMBB () override
	Tell the strategy that current MBB is done. More...

SUnit *	pickNode (bool &IsTopNode) override
	Pick the next node to schedule, or return NULL. More...

void	schedNode (SUnit *SU, bool IsTopNode) override
	ScheduleDAGMI has scheduled an instruction - tell HazardRec about it. More...

void	releaseTopNode (SUnit *SU) override
	SU has had all predecessor dependencies resolved. More...

void	releaseBottomNode (SUnit *SU) override
	Currently only scheduling top-down, so this method is empty. More...

Public Member Functions inherited from llvm::MachineSchedStrategy
virtual	~MachineSchedStrategy ()=default

virtual void	dumpPolicy () const

virtual bool	shouldTrackLaneMasks () const
	Returns true if lanemasks should be tracked. More...

virtual void	registerRoots ()
	Notify this strategy that all roots have been released (including those that depend on EntrySU or ExitSU). More...

virtual void	scheduleTree (unsigned SubtreeID)
	Scheduler callback to notify that a new subtree is scheduled. More...

Detailed Description

A MachineSchedStrategy implementation for SystemZ post RA scheduling.

Definition at line 31 of file SystemZMachineScheduler.h.

Constructor & Destructor Documentation

◆ SystemZPostRASchedStrategy()

SystemZPostRASchedStrategy::SystemZPostRASchedStrategy ( const MachineSchedContext * C )

Definition at line 129 of file SystemZMachineScheduler.cpp.

References llvm::MachineFunction::getSubtarget(), llvm::TargetSchedModel::init(), llvm::MachineSchedContext::MF, and llvm::ARM_MB::ST.

Referenced by leaveMBB().

◆ ~SystemZPostRASchedStrategy()

SystemZPostRASchedStrategy::~SystemZPostRASchedStrategy ( )

virtual

Definition at line 138 of file SystemZMachineScheduler.cpp.

References I.

Member Function Documentation

◆ doMBBSchedRegionsTopDown()

bool llvm::SystemZPostRASchedStrategy::doMBBSchedRegionsTopDown ( ) const

inlineoverridevirtual

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 129 of file SystemZMachineScheduler.h.

References enterMBB(), initialize(), leaveMBB(), pickNode(), releaseTopNode(), and schedNode().

◆ enterMBB()

void SystemZPostRASchedStrategy::enterMBB ( MachineBasicBlock * NextMBB )

overridevirtual

Tell the strategy that MBB is about to be processed.

Create a HazardRec for MBB, save it in SchedStates and set HazardRec to point to it.

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 78 of file SystemZMachineScheduler.cpp.

References assert(), llvm::SystemZHazardRecognizer::copyState(), llvm::dbgs(), llvm::SystemZHazardRecognizer::dumpState(), llvm::SystemZHazardRecognizer::emitInstruction(), llvm::SystemZInstrInfo::getBranchInfo(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::MachineLoopInfo::getLoopFor(), llvm::MachineOperand::getMBB(), getSingleSchedPred(), I, llvm::MachineOperand::isReg(), LLVM_DEBUG, llvm::printMBBReference(), and llvm::SystemZII::Branch::Target.

Referenced by doMBBSchedRegionsTopDown().

◆ initialize()

void SystemZPostRASchedStrategy::initialize ( ScheduleDAGMI * DAG )

overridevirtual

Initialize the strategy after building the DAG for a new region.

Implements llvm::MachineSchedStrategy.

Definition at line 74 of file SystemZMachineScheduler.cpp.

References llvm::SystemZHazardRecognizer::dumpState(), and LLVM_DEBUG.

Referenced by doMBBSchedRegionsTopDown().

◆ initPolicy()

void SystemZPostRASchedStrategy::initPolicy	(	MachineBasicBlock::iterator	Begin,
		MachineBasicBlock::iterator	End,
		unsigned	NumRegionInstrs
	)

overridevirtual

Called for a region before scheduling.

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 146 of file SystemZMachineScheduler.cpp.

◆ leaveMBB()

void SystemZPostRASchedStrategy::leaveMBB ( )

overridevirtual

Tell the strategy that current MBB is done.

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 120 of file SystemZMachineScheduler.cpp.

References llvm::dbgs(), llvm::MachineBasicBlock::getFirstTerminator(), LLVM_DEBUG, llvm::printMBBReference(), and SystemZPostRASchedStrategy().

Referenced by doMBBSchedRegionsTopDown().

◆ pickNode()

SUnit * SystemZPostRASchedStrategy::pickNode ( bool & IsTopNode )

overridevirtual

Pick the next node to schedule, or return NULL.

Implements llvm::MachineSchedStrategy.

Definition at line 158 of file SystemZMachineScheduler.cpp.

References assert(), llvm::dbgs(), llvm::SystemZHazardRecognizer::dumpSU(), llvm::SystemZHazardRecognizer::groupingCost(), LLVM_DEBUG, llvm::operator<(), and llvm::SystemZHazardRecognizer::resourcesCost().

Referenced by doMBBSchedRegionsTopDown().

◆ releaseBottomNode()

void llvm::SystemZPostRASchedStrategy::releaseBottomNode ( SUnit * SU )

inlineoverridevirtual

Currently only scheduling top-down, so this method is empty.

Implements llvm::MachineSchedStrategy.

Definition at line 151 of file SystemZMachineScheduler.h.

◆ releaseTopNode()

void SystemZPostRASchedStrategy::releaseTopNode ( SUnit * SU )

overridevirtual

SU has had all predecessor dependencies resolved.

Put it into Available.

Implements llvm::MachineSchedStrategy.

Definition at line 251 of file SystemZMachineScheduler.cpp.

References llvm::MCSchedClassDesc::BeginGroup, llvm::MCSchedClassDesc::EndGroup, llvm::SystemZHazardRecognizer::getSchedClass(), llvm::SUnit::isScheduleHigh, llvm::SUnit::isUnbuffered, llvm::MCSchedClassDesc::isValid(), and llvm::PPCISD::SC.

Referenced by doMBBSchedRegionsTopDown().

◆ schedNode()

void SystemZPostRASchedStrategy::schedNode	(	SUnit *	SU,
		bool	IsTopNode
	)

overridevirtual

ScheduleDAGMI has scheduled an instruction - tell HazardRec about it.

Implements llvm::MachineSchedStrategy.

Definition at line 241 of file SystemZMachineScheduler.cpp.

References llvm::dbgs(), llvm::SystemZHazardRecognizer::EmitInstruction(), if(), LLVM_DEBUG, and llvm::SUnit::NodeNum.

Referenced by doMBBSchedRegionsTopDown().

◆ shouldTrackPressure()

bool llvm::SystemZPostRASchedStrategy::shouldTrackPressure ( ) const

inlineoverridevirtual

PostRA scheduling does not track pressure.

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 125 of file SystemZMachineScheduler.h.

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

lib/Target/SystemZ/SystemZMachineScheduler.h
lib/Target/SystemZ/SystemZMachineScheduler.cpp