Package org.apache.sysds.hops.rewrite
Class RewriteRemoveDanglingParentReferences
- java.lang.Object
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- org.apache.sysds.hops.rewrite.HopRewriteRule
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- org.apache.sysds.hops.rewrite.RewriteRemoveDanglingParentReferences
 
 
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 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.
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Constructor SummaryConstructors Constructor Description RewriteRemoveDanglingParentReferences()
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Method SummaryAll 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.
 
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Method Detail- 
rewriteHopDAGspublic 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 class- HopRewriteRule
- Parameters:
- roots- high-level operator roots
- state- program rewrite status
- Returns:
- list of high-level operators
 
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rewriteHopDAGpublic Hop rewriteHopDAG(Hop root, ProgramRewriteStatus state) Description copied from class:HopRewriteRuleHandle a predicate hop DAG with exactly one root.- Specified by:
- rewriteHopDAGin class- HopRewriteRule
- Parameters:
- root- high-level operator root
- state- program rewrite status
- Returns:
- high-level operator
 
 
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