Represents a dependence between two instruction. More...

#include "llvm/CodeGen/MachinePipeliner.h"

Public Member Functions
	SwingSchedulerDDGEdge (SUnit *PredOrSucc, const SDep &Dep, bool IsSucc, bool IsValidationOnly)
	Creates an edge corresponding to an edge represented by `PredOrSucc` and `Dep` in the original DAG.

SUnit *	getSrc () const
	Returns the SUnit from which the edge comes (source node).

SUnit *	getDst () const
	Returns the SUnit to which the edge points (destination node).

unsigned	getLatency () const
	Returns the latency value for the edge.

void	setLatency (unsigned Latency)
	Sets the latency for the edge.

unsigned	getDistance () const
	Returns the distance value for the edge.

void	setDistance (unsigned D)
	Sets the distance value for the edge.

Register	getReg () const
	Returns the register associated with the edge.

bool	isAntiDep () const
	Returns true if the edge represents anti dependence.

bool	isOutputDep () const
	Returns true if the edge represents output dependence.

bool	isOrderDep () const
	Returns true if the edge represents a dependence that is not data, anti or output dependence.

bool	isBarrier () const
	Returns true if the edge represents unknown scheduling barrier.

bool	isArtificial () const
	Returns true if the edge represents an artificial dependence.

bool	isAssignedRegDep () const
	Tests if this is a Data dependence that is associated with a register.

bool	ignoreDependence (bool IgnoreAnti) const
	Returns true for DDG nodes that we ignore when computing the cost functions.

bool	isValidationOnly () const
	Returns true if this edge is intended to be used only for validating the schedule.

Detailed Description

Represents a dependence between two instruction.

Definition at line 119 of file MachinePipeliner.h.

Constructor & Destructor Documentation

◆ SwingSchedulerDDGEdge()

llvm::SwingSchedulerDDGEdge::SwingSchedulerDDGEdge	(	SUnit *	PredOrSucc,
		const SDep &	Dep,
		bool	IsSucc,
		bool	IsValidationOnly
	)

inline

Creates an edge corresponding to an edge represented by PredOrSucc and Dep in the original DAG.

This pair has no information about the direction of the edge, so we need to pass an additional argument IsSucc.

Definition at line 130 of file MachinePipeliner.h.

References llvm::SDep::Anti, llvm::SDep::Data, llvm::SDep::getKind(), llvm::SDep::getReg(), llvm::SDep::getSUnit(), Reg, llvm::SDep::setSUnit(), and std::swap().

Member Function Documentation

◆ getDistance()

unsigned llvm::SwingSchedulerDDGEdge::getDistance ( ) const

inline

Returns the distance value for the edge.

Definition at line 163 of file MachinePipeliner.h.

◆ getDst()

SUnit * llvm::SwingSchedulerDDGEdge::getDst ( ) const

inline

Returns the SUnit to which the edge points (destination node).

Definition at line 154 of file MachinePipeliner.h.

Referenced by llvm::SMSchedule::latestCycleInChain().

◆ getLatency()

unsigned llvm::SwingSchedulerDDGEdge::getLatency ( ) const

inline

Returns the latency value for the edge.

Definition at line 157 of file MachinePipeliner.h.

References llvm::SDep::getLatency().

◆ getReg()

Register llvm::SwingSchedulerDDGEdge::getReg ( ) const

inline

Returns the register associated with the edge.

Definition at line 169 of file MachinePipeliner.h.

References llvm::SDep::getReg().

◆ getSrc()

SUnit * llvm::SwingSchedulerDDGEdge::getSrc ( ) const

inline

Returns the SUnit from which the edge comes (source node).

Definition at line 151 of file MachinePipeliner.h.

References llvm::SDep::getSUnit().

Referenced by llvm::SMSchedule::earliestCycleInChain().

◆ ignoreDependence()

bool SwingSchedulerDDGEdge::ignoreDependence ( bool IgnoreAnti ) const

Returns true for DDG nodes that we ignore when computing the cost functions.

We ignore the back-edge recurrence in order to avoid unbounded recursion in the calculation of the ASAP, ALAP, etc functions.

Definition at line 4130 of file MachinePipeliner.cpp.

◆ isAntiDep()

bool llvm::SwingSchedulerDDGEdge::isAntiDep ( ) const

inline

Returns true if the edge represents anti dependence.

Definition at line 172 of file MachinePipeliner.h.

References llvm::SDep::Anti, and llvm::SDep::getKind().

◆ isArtificial()

bool llvm::SwingSchedulerDDGEdge::isArtificial ( ) const

inline

Returns true if the edge represents an artificial dependence.

Definition at line 185 of file MachinePipeliner.h.

References llvm::SDep::isArtificial().

◆ isAssignedRegDep()

bool llvm::SwingSchedulerDDGEdge::isAssignedRegDep ( ) const

inline

Tests if this is a Data dependence that is associated with a register.

Definition at line 188 of file MachinePipeliner.h.

References llvm::SDep::isAssignedRegDep().

◆ isBarrier()

bool llvm::SwingSchedulerDDGEdge::isBarrier ( ) const

inline

Returns true if the edge represents unknown scheduling barrier.

Definition at line 182 of file MachinePipeliner.h.

References llvm::SDep::isBarrier().

◆ isOrderDep()

bool llvm::SwingSchedulerDDGEdge::isOrderDep ( ) const

inline

Returns true if the edge represents a dependence that is not data, anti or output dependence.

Definition at line 179 of file MachinePipeliner.h.

References llvm::SDep::getKind(), and llvm::SDep::Order.

◆ isOutputDep()

bool llvm::SwingSchedulerDDGEdge::isOutputDep ( ) const

inline

Returns true if the edge represents output dependence.

Definition at line 175 of file MachinePipeliner.h.

References llvm::SDep::getKind(), and llvm::SDep::Output.

◆ isValidationOnly()

bool llvm::SwingSchedulerDDGEdge::isValidationOnly ( ) const

inline

Returns true if this edge is intended to be used only for validating the schedule.

Definition at line 197 of file MachinePipeliner.h.

◆ setDistance()

void llvm::SwingSchedulerDDGEdge::setDistance ( unsigned D )

inline

Sets the distance value for the edge.

Definition at line 166 of file MachinePipeliner.h.

References D.

◆ setLatency()

void llvm::SwingSchedulerDDGEdge::setLatency ( unsigned Latency )

inline

Sets the latency for the edge.

Definition at line 160 of file MachinePipeliner.h.

References llvm::Latency, and llvm::SDep::setLatency().

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

include/llvm/CodeGen/MachinePipeliner.h
lib/CodeGen/MachinePipeliner.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ SwingSchedulerDDGEdge()

Member Function Documentation

◆ getDistance()

◆ getDst()

◆ getLatency()

◆ getReg()

◆ getSrc()

◆ ignoreDependence()

◆ isAntiDep()

◆ isArtificial()

◆ isAssignedRegDep()

◆ isBarrier()

◆ isOrderDep()

◆ isOutputDep()

◆ isValidationOnly()

◆ setDistance()

◆ setLatency()