Compute the values of each DAG node for various metrics during DFS. More...

#include <ScheduleDFS.h>

Public Member Functions
	SchedDFSResult (bool IsBU, unsigned lim)

unsigned	getSubtreeLimit () const
	Get the node cutoff before subtrees are considered significant. More...

bool	empty () const
	Return true if this DFSResult is uninitialized. More...

void	clear ()
	Clear the results. More...

void	resize (unsigned NumSUnits)
	Initialize the result data with the size of the DAG. More...

void	compute (ArrayRef< SUnit > SUnits)
	Compute various metrics for the DAG with given roots. More...

unsigned	getNumInstrs (const SUnit *SU) const
	Get the number of instructions in the given subtree and its children. More...

unsigned	getNumSubInstrs (unsigned SubtreeID) const
	Get the number of instructions in the given subtree not including children. More...

ILPValue	getILP (const SUnit *SU) const
	Get the ILP value for a DAG node. More...

unsigned	getNumSubtrees () const
	The number of subtrees detected in this DAG. More...

unsigned	getSubtreeID (const SUnit *SU) const
	Get the ID of the subtree the given DAG node belongs to. More...

unsigned	getSubtreeLevel (unsigned SubtreeID) const
	Get the connection level of a subtree. More...

void	scheduleTree (unsigned SubtreeID)
	Scheduler callback to update SubtreeConnectLevels when a tree is initially scheduled. More...

Friends
class	SchedDFSImpl

Detailed Description

Compute the values of each DAG node for various metrics during DFS.

Definition at line 68 of file ScheduleDFS.h.

Constructor & Destructor Documentation

llvm::SchedDFSResult::SchedDFSResult	(	bool	IsBU,
		unsigned	lim
	)

inline

Definition at line 119 of file ScheduleDFS.h.

Member Function Documentation

void llvm::SchedDFSResult::clear ( )

inline

Clear the results.

Definition at line 131 of file ScheduleDFS.h.

References llvm::SmallVectorImpl< T >::clear().

Referenced by llvm::ScheduleDAGMI::computeDFSResult().

void SchedDFSResult::compute ( ArrayRef< SUnit > SUnits )

Compute various metrics for the DAG with given roots.

Compute an ILP metric for all nodes in the subDAG reachable via depth-first search from this root.

Definition at line 1261 of file ScheduleDAGInstrs.cpp.

References llvm::ArrayRef< T >::begin(), llvm::SDep::Data, llvm::ArrayRef< T >::end(), llvm::SchedDFSImpl::finalize(), llvm::SDep::getKind(), llvm::SDep::getSUnit(), hasDataSucc(), llvm::SUnit::isBoundaryNode(), llvm::SchedDFSImpl::isVisited(), llvm_unreachable, llvm::SchedDFSImpl::visitCrossEdge(), llvm::SchedDFSImpl::visitPostorderEdge(), llvm::SchedDFSImpl::visitPostorderNode(), and llvm::SchedDFSImpl::visitPreorder().

Referenced by llvm::ScheduleDAGMI::computeDFSResult().

bool llvm::SchedDFSResult::empty ( ) const

inline

Return true if this DFSResult is uninitialized.

resize() initializes DFSResult, while compute() populates it.

Definition at line 128 of file ScheduleDFS.h.

Referenced by getSubtreeID().

ILPValue llvm::SchedDFSResult::getILP ( const SUnit * SU ) const

inline

Get the ILP value for a DAG node.

A leaf node has an ILP of 1/1.

Definition at line 161 of file ScheduleDFS.h.

References llvm::SUnit::getDepth(), and llvm::SUnit::NodeNum.

unsigned llvm::SchedDFSResult::getNumInstrs ( const SUnit * SU ) const

inline

Get the number of instructions in the given subtree and its children.

Definition at line 148 of file ScheduleDFS.h.

References llvm::SUnit::NodeNum.

Referenced by llvm::DOTGraphTraits< ScheduleDAGMI * >::getNodeLabel().

unsigned llvm::SchedDFSResult::getNumSubInstrs ( unsigned SubtreeID ) const

inline

Get the number of instructions in the given subtree not including children.

Definition at line 154 of file ScheduleDFS.h.

unsigned llvm::SchedDFSResult::getNumSubtrees ( ) const

inline

The number of subtrees detected in this DAG.

Definition at line 166 of file ScheduleDFS.h.

Referenced by llvm::ScheduleDAGMI::computeDFSResult(), and llvm::SchedDFSImpl::finalize().

unsigned llvm::SchedDFSResult::getSubtreeID ( const SUnit * SU ) const

inline

Get the ID of the subtree the given DAG node belongs to.

For convenience, if DFSResults have not been computed yet, give everything tree ID 0.

Definition at line 172 of file ScheduleDFS.h.

References empty(), and llvm::SUnit::NodeNum.

Referenced by llvm::DOTGraphTraits< ScheduleDAGMI * >::getNodeAttributes(), and llvm::ScheduleDAGMI::updateQueues().

unsigned llvm::SchedDFSResult::getSubtreeLevel ( unsigned SubtreeID ) const

inline

Get the connection level of a subtree.

For bottom-up trees, the connection level is the latency depth (in cycles) of the deepest connection to another subtree.

Definition at line 183 of file ScheduleDFS.h.

unsigned llvm::SchedDFSResult::getSubtreeLimit ( ) const

inline

Get the node cutoff before subtrees are considered significant.

Definition at line 123 of file ScheduleDFS.h.

void llvm::SchedDFSResult::resize ( unsigned NumSUnits )

inline

Initialize the result data with the size of the DAG.

Definition at line 139 of file ScheduleDFS.h.

Referenced by llvm::ScheduleDAGMI::computeDFSResult().

void SchedDFSResult::scheduleTree ( unsigned SubtreeID )

Scheduler callback to update SubtreeConnectLevels when a tree is initially scheduled.

The root of the given SubtreeID was just scheduled. For all subtrees connected to this tree, record the depth of the connection so that the nearest connected subtrees can be prioritized.

Definition at line 1309 of file ScheduleDAGInstrs.cpp.

References llvm::sys::path::begin(), llvm::dbgs(), DEBUG, llvm::sys::path::end(), and I.

Referenced by llvm::ScheduleDAGMI::updateQueues().

Friends And Related Function Documentation

friend class SchedDFSImpl

friend

Definition at line 69 of file ScheduleDFS.h.

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

Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation