LLVM 20.0.0git
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llvm::SystemZPostRASchedStrategy Class Reference

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.
 
bool shouldTrackPressure () const override
 PostRA scheduling does not track pressure.
 
bool doMBBSchedRegionsTopDown () const override
 
void initialize (ScheduleDAGMI *dag) override
 Initialize the strategy after building the DAG for a new region.
 
void enterMBB (MachineBasicBlock *NextMBB) override
 Tell the strategy that MBB is about to be processed.
 
void leaveMBB () override
 Tell the strategy that current MBB is done.
 
SUnit * pickNode (bool &IsTopNode) override
 Pick the next node to schedule, or return NULL.
 
void schedNode (SUnit *SU, bool IsTopNode) override
 ScheduleDAGMI has scheduled an instruction - tell HazardRec about it.
 
void releaseTopNode (SUnit *SU) override
 SU has had all predecessor dependencies resolved.
 
void releaseBottomNode (SUnit *SU) override
 Currently only scheduling top-down, so this method is empty.
 
- Public Member Functions inherited from llvm::MachineSchedStrategy
virtual ~MachineSchedStrategy ()=default
 
virtual void initPolicy (MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned NumRegionInstrs)
 Optionally override the per-region scheduling policy.
 
virtual void dumpPolicy () const
 
virtual bool shouldTrackPressure () const
 Check if pressure tracking is needed before building the DAG and initializing this strategy.
 
virtual bool shouldTrackLaneMasks () const
 Returns true if lanemasks should be tracked.
 
virtual bool doMBBSchedRegionsTopDown () const
 
virtual void initialize (ScheduleDAGMI *DAG)=0
 Initialize the strategy after building the DAG for a new region.
 
virtual void enterMBB (MachineBasicBlock *MBB)
 Tell the strategy that MBB is about to be processed.
 
virtual void leaveMBB ()
 Tell the strategy that current MBB is done.
 
virtual void registerRoots ()
 Notify this strategy that all roots have been released (including those that depend on EntrySU or ExitSU).
 
virtual SUnit * pickNode (bool &IsTopNode)=0
 Pick the next node to schedule, or return NULL.
 
virtual void scheduleTree (unsigned SubtreeID)
 Scheduler callback to notify that a new subtree is scheduled.
 
virtual void schedNode (SUnit *SU, bool IsTopNode)=0
 Notify MachineSchedStrategy that ScheduleDAGMI has scheduled an instruction and updated scheduled/remaining flags in the DAG nodes.
 
virtual void releaseTopNode (SUnit *SU)=0
 When all predecessor dependencies have been resolved, free this node for top-down scheduling.
 
virtual void releaseBottomNode (SUnit *SU)=0
 When all successor dependencies have been resolved, free this node for bottom-up scheduling.
 

Detailed Description

A MachineSchedStrategy implementation for SystemZ post RA scheduling.

Definition at line 28 of file SystemZMachineScheduler.h.

Constructor & Destructor Documentation

◆ SystemZPostRASchedStrategy()

SystemZPostRASchedStrategy::SystemZPostRASchedStrategy ( const MachineSchedContext *  C)

Definition at line 128 of file SystemZMachineScheduler.cpp.

References llvm::CallingConv::C, and llvm::TargetSchedModel::init().

◆ ~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 126 of file SystemZMachineScheduler.h.

◆ 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 79 of file SystemZMachineScheduler.cpp.

References assert(), llvm::SystemZHazardRecognizer::copyState(), llvm::dbgs(), llvm::Pass::dump(), llvm::SystemZHazardRecognizer::dumpState(), llvm::SystemZHazardRecognizer::emitInstruction(), llvm::SystemZInstrInfo::getBranchInfo(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::SystemZII::Branch::getMBBTarget(), getSingleSchedPred(), if(), llvm::SystemZII::Branch::isIndirect(), LLVM_DEBUG, MI, and llvm::printMBBReference().

◆ 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.

◆ 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, and llvm::printMBBReference().

◆ 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(), and LLVM_DEBUG.

◆ releaseBottomNode()

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

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

Implements llvm::MachineSchedStrategy.

Definition at line 148 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::SystemZHazardRecognizer::getSchedClass(), llvm::SUnit::isScheduleHigh, and llvm::SUnit::isUnbuffered.

◆ 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.

◆ shouldTrackPressure()

bool llvm::SystemZPostRASchedStrategy::shouldTrackPressure ( ) const
inlineoverridevirtual

PostRA scheduling does not track pressure.

Reimplemented from llvm::MachineSchedStrategy.

Definition at line 122 of file SystemZMachineScheduler.h.

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