PostGenericScheduler - Interface to the scheduling algorithm used by ScheduleDAGMI. More...

#include "llvm/CodeGen/MachineScheduler.h"

Inheritance diagram for llvm::PostGenericScheduler:

Public Member Functions
	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.
bool	shouldTrackPressure () const override
	PostRA scheduling does not track pressure.
void	initialize (ScheduleDAGMI *Dag) override
	Initialize the strategy after building the DAG for a new region.
void	registerRoots () override
	Notify this strategy that all roots have been released (including those that depend on EntrySU or ExitSU).
SUnit *	pickNode (bool &IsTopNode) override
	Pick the next node to schedule.
SUnit *	pickNodeBidirectional (bool &IsTopNode)
	Pick the best candidate node from either the top or bottom queue.
void	scheduleTree (unsigned SubtreeID) override
	Scheduler callback to notify that a new subtree is scheduled.
void	schedNode (SUnit *SU, bool IsTopNode) override
	Called after ScheduleDAGMI has scheduled an instruction and updated scheduled/remaining flags in the DAG nodes.
void	releaseTopNode (SUnit *SU) override
	When all predecessor dependencies have been resolved, free this node for top-down scheduling.
void	releaseBottomNode (SUnit *SU) override
	When all successor dependencies have been resolved, free this node for bottom-up scheduling.
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.
virtual bool	doMBBSchedRegionsTopDown () const
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.

Protected Member Functions
virtual bool	tryCandidate (SchedCandidate &Cand, SchedCandidate &TryCand)
	Apply a set of heuristics to a new candidate for PostRA scheduling.
void	pickNodeFromQueue (SchedBoundary &Zone, SchedCandidate &Cand)
Protected Member Functions inherited from llvm::GenericSchedulerBase
	GenericSchedulerBase (const MachineSchedContext *C)
LLVM_ABI 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.
MachineSchedPolicy	getPolicy () const override
void	traceCandidate (const SchedCandidate &Cand)

Protected Attributes
ScheduleDAGMI *	DAG = nullptr
SchedBoundary	Top
SchedBoundary	Bot
SchedCandidate	TopCand
	Candidate last picked from Top boundary.
SchedCandidate	BotCand
	Candidate last picked from Bot boundary.
unsigned	TopClusterID
unsigned	BotClusterID
Protected Attributes inherited from llvm::GenericSchedulerBase
const MachineSchedContext *	Context
const TargetSchedModel *	SchedModel = nullptr
const TargetRegisterInfo *	TRI = nullptr
unsigned	TopIdx = 0
unsigned	BotIdx = 0
unsigned	NumRegionInstrs = 0
MachineSchedPolicy	RegionPolicy
SchedRemainder	Rem

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 , NodeOrder , FirstValid }
	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)