llvm::SchedDFSResult Class Reference

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

#include "llvm/CodeGen/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 66 of file ScheduleDFS.h.

Constructor & Destructor Documentation

SchedDFSResult()

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

inline

Definition at line 117 of file ScheduleDFS.h.

Member Function Documentation

clear()

void llvm::SchedDFSResult::clear ( )

inline

Clear the results.

Definition at line 129 of file ScheduleDFS.h.

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

compute()

void SchedDFSResult::compute

(

ArrayRef< SUnit >

SUnits

)

Compute various metrics for the DAG with given roots.

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

Definition at line 1383 of file ScheduleDAGInstrs.cpp.

References llvm::SDep::Data, DFS(), 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().

empty()

bool llvm::SchedDFSResult::empty ( ) const

inline

Return true if this DFSResult is uninitialized.

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

Definition at line 126 of file ScheduleDFS.h.

getILP()

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 159 of file ScheduleDFS.h.

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

Referenced by llvm::createGenericSchedPostRA().

getNumInstrs()

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

inline

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

Definition at line 146 of file ScheduleDFS.h.

References llvm::SUnit::NodeNum.

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

getNumSubInstrs()

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

inline

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

Definition at line 152 of file ScheduleDFS.h.

getNumSubtrees()

unsigned llvm::SchedDFSResult::getNumSubtrees ( ) const

inline

The number of subtrees detected in this DAG.

Definition at line 164 of file ScheduleDFS.h.

Referenced by llvm::SchedDFSImpl::finalize().

getSubtreeID()

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 170 of file ScheduleDFS.h.

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

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

getSubtreeLevel()

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 181 of file ScheduleDFS.h.

References llvm::operator<<().

Referenced by llvm::createGenericSchedPostRA().

getSubtreeLimit()

unsigned llvm::SchedDFSResult::getSubtreeLimit ( ) const

inline

Get the node cutoff before subtrees are considered significant.

Definition at line 121 of file ScheduleDFS.h.

resize()

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

inline

Initialize the result data with the size of the DAG.

Definition at line 137 of file ScheduleDFS.h.

scheduleTree()

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 1429 of file ScheduleDAGInstrs.cpp.

References C, llvm::dbgs(), LLVM_DEBUG, and llvm::max().

Friends And Related Function Documentation

SchedDFSImpl

friend class SchedDFSImpl

friend

Definition at line 67 of file ScheduleDFS.h.

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

• include/llvm/CodeGen/ScheduleDFS.h
• lib/CodeGen/ScheduleDAGInstrs.cpp