Package org.apache.sysds.hops.rewrite
Class RewriteHoistLoopInvariantOperations
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- org.apache.sysds.hops.rewrite.StatementBlockRewriteRule
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- org.apache.sysds.hops.rewrite.RewriteHoistLoopInvariantOperations
 
 
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 public class RewriteHoistLoopInvariantOperations extends StatementBlockRewriteRule Rule: Simplify program structure by hoisting loop-invariant operations out of while, for, or parfor loops.
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Constructor SummaryConstructors Constructor Description RewriteHoistLoopInvariantOperations()RewriteHoistLoopInvariantOperations(boolean noSideEffects)
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description booleancreatesSplitDag()Indicates if the rewrite potentially splits dags, which is used for phase ordering of rewrites.List<StatementBlock>rewriteStatementBlock(StatementBlock sb, ProgramRewriteStatus state)Handle an arbitrary statement block.List<StatementBlock>rewriteStatementBlocks(List<StatementBlock> sbs, ProgramRewriteStatus state)Handle a list of statement blocks.- 
Methods inherited from class org.apache.sysds.hops.rewrite.StatementBlockRewriteRulecreateCutVarName
 
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Method Detail- 
createsSplitDagpublic boolean createsSplitDag() Description copied from class:StatementBlockRewriteRuleIndicates if the rewrite potentially splits dags, which is used for phase ordering of rewrites.- Specified by:
- createsSplitDagin class- StatementBlockRewriteRule
- Returns:
- true if dag splits are possible.
 
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rewriteStatementBlockpublic List<StatementBlock> rewriteStatementBlock(StatementBlock sb, ProgramRewriteStatus state) Description copied from class:StatementBlockRewriteRuleHandle an arbitrary statement block. Specific type constraints have to be ensured within the individual rewrites. If a rewrite does not apply to individual blocks, it should simply return the input block.- Specified by:
- rewriteStatementBlockin class- StatementBlockRewriteRule
- Parameters:
- sb- statement block
- state- program rewrite status
- Returns:
- list of statement blocks
 
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rewriteStatementBlockspublic List<StatementBlock> rewriteStatementBlocks(List<StatementBlock> sbs, ProgramRewriteStatus state) Description copied from class:StatementBlockRewriteRuleHandle a list of statement blocks. Specific type constraints have to be ensured within the individual rewrites. If a rewrite does not require sequence access, it should simply return the input list of statement blocks.- Specified by:
- rewriteStatementBlocksin class- StatementBlockRewriteRule
- Parameters:
- sbs- list of statement blocks
- state- program rewrite status
- Returns:
- list of statement blocks
 
 
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