LLVM  15.0.0git
Public Member Functions | Protected Member Functions | List of all members
llvm::AArch64PostRASchedStrategy Class Reference

A MachineSchedStrategy implementation for AArch64 post RA scheduling. More...

#include "Target/AArch64/AArch64MachineScheduler.h"

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Public Member Functions

 AArch64PostRASchedStrategy (const MachineSchedContext *C)
 
- Public Member Functions inherited from llvm::PostGenericScheduler
 PostGenericScheduler (const MachineSchedContext *C)
 
 ~PostGenericScheduler () override=default
 
void initPolicy (MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned NumRegionInstrs) override
 Optionally override the per-region scheduling policy. More...
 
bool shouldTrackPressure () const override
 PostRA scheduling does not track pressure. More...
 
void initialize (ScheduleDAGMI *Dag) override
 Initialize the strategy after building the DAG for a new region. More...
 
void registerRoots () override
 Notify this strategy that all roots have been released (including those that depend on EntrySU or ExitSU). More...
 
SUnitpickNode (bool &IsTopNode) override
 Pick the next node to schedule. More...
 
void scheduleTree (unsigned SubtreeID) override
 Scheduler callback to notify that a new subtree is scheduled. More...
 
void schedNode (SUnit *SU, bool IsTopNode) override
 Called after ScheduleDAGMI has scheduled an instruction and updated scheduled/remaining flags in the DAG nodes. More...
 
void releaseTopNode (SUnit *SU) override
 When all predecessor dependencies have been resolved, free this node for top-down scheduling. More...
 
void releaseBottomNode (SUnit *SU) override
 When all successor dependencies have been resolved, free this node for bottom-up scheduling. 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 bool doMBBSchedRegionsTopDown () const
 
virtual void enterMBB (MachineBasicBlock *MBB)
 Tell the strategy that MBB is about to be processed. More...
 
virtual void leaveMBB ()
 Tell the strategy that current MBB is done. More...
 

Protected Member Functions

bool tryCandidate (SchedCandidate &Cand, SchedCandidate &TryCand) override
 Apply a set of heuristics to a new candidate for PostRA scheduling. More...
 
- Protected Member Functions inherited from llvm::PostGenericScheduler
void pickNodeFromQueue (SchedCandidate &Cand)
 
- Protected Member Functions inherited from llvm::GenericSchedulerBase
 GenericSchedulerBase (const MachineSchedContext *C)
 
void setPolicy (CandPolicy &Policy, bool IsPostRA, SchedBoundary &CurrZone, SchedBoundary *OtherZone)
 Set the CandPolicy given a scheduling zone given the current resources and latencies inside and outside the zone. More...
 
void traceCandidate (const SchedCandidate &Cand)
 

Additional Inherited Members

- Public Types inherited from llvm::GenericSchedulerBase
enum  CandReason : uint8_t {
  NoCand, Only1, PhysReg, RegExcess,
  RegCritical, Stall, Cluster, Weak,
  RegMax, ResourceReduce, ResourceDemand, BotHeightReduce,
  BotPathReduce, TopDepthReduce, TopPathReduce, NextDefUse,
  NodeOrder
}
 Represent the type of SchedCandidate found within a single queue. More...
 
- Static Public Member Functions inherited from llvm::GenericSchedulerBase
static const char * getReasonStr (GenericSchedulerBase::CandReason Reason)
 
- Protected Attributes inherited from llvm::PostGenericScheduler
ScheduleDAGMIDAG = nullptr
 
SchedBoundary Top
 
SmallVector< SUnit *, 8 > BotRoots
 
- Protected Attributes inherited from llvm::GenericSchedulerBase
const MachineSchedContextContext
 
const TargetSchedModelSchedModel = nullptr
 
const TargetRegisterInfoTRI = nullptr
 
SchedRemainder Rem
 

Detailed Description

A MachineSchedStrategy implementation for AArch64 post RA scheduling.

Definition at line 21 of file AArch64MachineScheduler.h.

Constructor & Destructor Documentation

◆ AArch64PostRASchedStrategy()

llvm::AArch64PostRASchedStrategy::AArch64PostRASchedStrategy ( const MachineSchedContext C)
inline

Definition at line 23 of file AArch64MachineScheduler.h.

Member Function Documentation

◆ tryCandidate()

bool AArch64PostRASchedStrategy::tryCandidate ( SchedCandidate Cand,
SchedCandidate TryCand 
)
overrideprotectedvirtual

Apply a set of heuristics to a new candidate for PostRA scheduling.

Parameters
Candprovides the policy and current best candidate.
TryCandrefers to the next SUnit candidate, otherwise uninitialized.
Returns
true if TryCand is better than Cand (Reason is NOT NoCand)

Reimplemented from llvm::PostGenericScheduler.

Definition at line 61 of file AArch64MachineScheduler.cpp.

References llvm::SUnit::getInstr(), llvm::GenericSchedulerBase::SchedCandidate::isValid(), mayOverlapWrite(), needReorderStoreMI(), llvm::GenericSchedulerBase::NodeOrder, llvm::GenericSchedulerBase::SchedCandidate::Reason, llvm::GenericSchedulerBase::SchedCandidate::SU, and llvm::PostGenericScheduler::tryCandidate().


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