Package org.apache.sysds.hops.rewrite
Class RewriteRemoveDanglingParentReferences
- java.lang.Object
-
- org.apache.sysds.hops.rewrite.HopRewriteRule
-
- org.apache.sysds.hops.rewrite.RewriteRemoveDanglingParentReferences
-
public class RewriteRemoveDanglingParentReferences extends HopRewriteRule
This rewrite is a general-purpose cleanup pass that removes any dangling parent references in one pass through the hop DAG. These dangling references could have been introduced by rewrites that remove operators but miss a proper cleanup.
-
-
Constructor Summary
Constructors Constructor Description RewriteRemoveDanglingParentReferences()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description HoprewriteHopDAG(Hop root, ProgramRewriteStatus state)Handle a predicate hop DAG with exactly one root.ArrayList<Hop>rewriteHopDAGs(ArrayList<Hop> roots, ProgramRewriteStatus state)Handle a generic (last-level) hop DAG with multiple roots.
-
-
-
Method Detail
-
rewriteHopDAGs
public ArrayList<Hop> rewriteHopDAGs(ArrayList<Hop> roots, ProgramRewriteStatus state)
Description copied from class:HopRewriteRuleHandle a generic (last-level) hop DAG with multiple roots.- Specified by:
rewriteHopDAGsin classHopRewriteRule- Parameters:
roots- high-level operator rootsstate- program rewrite status- Returns:
- list of high-level operators
-
rewriteHopDAG
public Hop rewriteHopDAG(Hop root, ProgramRewriteStatus state)
Description copied from class:HopRewriteRuleHandle a predicate hop DAG with exactly one root.- Specified by:
rewriteHopDAGin classHopRewriteRule- Parameters:
root- high-level operator rootstate- program rewrite status- Returns:
- high-level operator
-
-