org.apache.sysds.hops.rewrite

Class HopRewriteRule

java.lang.Object

org.apache.sysds.hops.rewrite.HopRewriteRule

Direct Known Subclasses:

RewriteAlgebraicSimplificationDynamic, RewriteAlgebraicSimplificationStatic, RewriteBlockSizeAndReblock, RewriteCommonSubexpressionElimination, RewriteConstantFolding, RewriteElementwiseMultChainOptimization, RewriteGPUSpecificOps, RewriteIndexingVectorization, RewriteInjectSparkPReadCheckpointing, RewriteMatrixMultChainOptimization, RewriteRemoveDanglingParentReferences, RewriteRemovePersistentReadWrite, RewriteRemoveReadAfterWrite, RewriteRemoveUnnecessaryCasts, RewriteTransientWriteParentHandling

public abstract class HopRewriteRule
extends Object

Base class for all hop rewrites in order to enable generic application of all rules.

Constructor Summary

Constructors

Constructor and Description
HopRewriteRule()

Method Summary

Modifier and Type	Method and Description
abstract Hop	rewriteHopDAG(Hop root, ProgramRewriteStatus state) Handle a predicate hop DAG with exactly one root.
abstract ArrayList<Hop>	rewriteHopDAGs(ArrayList<Hop> roots, ProgramRewriteStatus state) Handle a generic (last-level) hop DAG with multiple roots.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HopRewriteRule

public HopRewriteRule()

Method Detail

rewriteHopDAGs

public abstract ArrayList<Hop> rewriteHopDAGs(ArrayList<Hop> roots,
                                              ProgramRewriteStatus state)

Handle a generic (last-level) hop DAG with multiple roots.

Parameters:

roots - high-level operator roots

state - program rewrite status

Returns:

list of high-level operators

rewriteHopDAG

public abstract Hop rewriteHopDAG(Hop root,
                                  ProgramRewriteStatus state)

Handle a predicate hop DAG with exactly one root.

Parameters:

root - high-level operator root

state - program rewrite status

Returns:

high-level operator