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| <h1 title="Package" class="title">Package org.apache.sysds.hops.rewrite</h1> |
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| <table class="typeSummary"> |
| <caption><span>Class Summary</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="HopDagValidator.html" title="class in org.apache.sysds.hops.rewrite">HopDagValidator</a></th> |
| <td class="colLast"> |
| <div class="block">This class allows to check hop dags for validity, e.g., parent-child linking.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="HopRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">HopRewriteRule</a></th> |
| <td class="colLast"> |
| <div class="block">Base class for all hop rewrites in order to enable generic |
| application of all rules.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="HopRewriteUtils.html" title="class in org.apache.sysds.hops.rewrite">HopRewriteUtils</a></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="MarkForLineageReuse.html" title="class in org.apache.sysds.hops.rewrite">MarkForLineageReuse</a></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="ProgramRewriter.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriter</a></th> |
| <td class="colLast"> |
| <div class="block">This program rewriter applies a variety of rule-based rewrites |
| on all hop dags of the given program in one pass over the entire |
| program.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="ProgramRewriteStatus.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriteStatus</a></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteAlgebraicSimplificationDynamic.html" title="class in org.apache.sysds.hops.rewrite">RewriteAlgebraicSimplificationDynamic</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Algebraic Simplifications.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteAlgebraicSimplificationStatic.html" title="class in org.apache.sysds.hops.rewrite">RewriteAlgebraicSimplificationStatic</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Algebraic Simplifications.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteBlockSizeAndReblock.html" title="class in org.apache.sysds.hops.rewrite">RewriteBlockSizeAndReblock</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: BlockSizeAndReblock.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteCommonSubexpressionElimination.html" title="class in org.apache.sysds.hops.rewrite">RewriteCommonSubexpressionElimination</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: CommonSubexpressionElimination.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteCompressedReblock.html" title="class in org.apache.sysds.hops.rewrite">RewriteCompressedReblock</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Compressed Re block if config compressed.linalg is enabled, we inject compression directions after read of |
| matrices if number of rows is above 1000 and cols at least 1.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteConstantFolding.html" title="class in org.apache.sysds.hops.rewrite">RewriteConstantFolding</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Constant Folding.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteElementwiseMultChainOptimization.html" title="class in org.apache.sysds.hops.rewrite">RewriteElementwiseMultChainOptimization</a></th> |
| <td class="colLast"> |
| <div class="block">Prerequisite: RewriteCommonSubexpressionElimination must run before this rule.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteForLoopVectorization.html" title="class in org.apache.sysds.hops.rewrite">RewriteForLoopVectorization</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by pulling if or else statement body out |
| (removing the if statement block ifself) in order to allow intra-procedure |
| analysis to propagate exact statistics.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteGPUSpecificOps.html" title="class in org.apache.sysds.hops.rewrite">RewriteGPUSpecificOps</a></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteHoistLoopInvariantOperations.html" title="class in org.apache.sysds.hops.rewrite">RewriteHoistLoopInvariantOperations</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by hoisting loop-invariant operations |
| out of while, for, or parfor loops.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteIndexingVectorization.html" title="class in org.apache.sysds.hops.rewrite">RewriteIndexingVectorization</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Indexing vectorization.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteInjectSparkLoopCheckpointing.html" title="class in org.apache.sysds.hops.rewrite">RewriteInjectSparkLoopCheckpointing</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Insert checkpointing operations for caching purposes.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteInjectSparkPReadCheckpointing.html" title="class in org.apache.sysds.hops.rewrite">RewriteInjectSparkPReadCheckpointing</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Inject checkpointing on reading in data in all cases where the operand is used in more than one operation.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteMarkLoopVariablesUpdateInPlace.html" title="class in org.apache.sysds.hops.rewrite">RewriteMarkLoopVariablesUpdateInPlace</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Mark loop variables that are only read/updated through cp left indexing |
| for update in-place.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteMatrixMultChainOptimization.html" title="class in org.apache.sysds.hops.rewrite">RewriteMatrixMultChainOptimization</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Determine the optimal order of execution for a chain of |
| matrix multiplications |
| |
| Solution: Classic Dynamic Programming |
| Approach: Currently, the approach based only on matrix dimensions |
| Goal: To reduce the number of computations in the run-time |
| (map-reduce) layer</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteMatrixMultChainOptimizationSparse.html" title="class in org.apache.sysds.hops.rewrite">RewriteMatrixMultChainOptimizationSparse</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Determine the optimal order of execution for a chain of |
| matrix multiplications |
| |
| Solution: Classic Dynamic Programming |
| Approach: Currently, the approach based only on matrix dimensions |
| and sparsity estimates using the MNC sketch |
| Goal: To reduce the number of computations in the run-time |
| (map-reduce) layer</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteMergeBlockSequence.html" title="class in org.apache.sysds.hops.rewrite">RewriteMergeBlockSequence</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by merging sequences of last-level |
| statement blocks in order to create optimization opportunities.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveDanglingParentReferences.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveDanglingParentReferences</a></th> |
| <td class="colLast"> |
| <div class="block">This rewrite is a general-purpose cleanup pass that removes any |
| dangling parent references in one pass through the hop DAG.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveEmptyBasicBlocks.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveEmptyBasicBlocks</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by removing empty last-level blocks, |
| which may originate from the original program or due to a sequence of |
| rewrites (e.g., checkpoint injection and subsequent IPA).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveForLoopEmptySequence.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveForLoopEmptySequence</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by removing (par)for statements iterating over |
| an empty sequence, i.e., (par)for-loops without a single iteration.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemovePersistentReadWrite.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemovePersistentReadWrite</a></th> |
| <td class="colLast"> |
| <div class="block">This rewrite is a custom rewrite for JMLC in order to replace all persistent reads |
| and writes with transient reads and writes from the symbol table.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveReadAfterWrite.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveReadAfterWrite</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: RemoveReadAfterWrite.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveUnnecessaryBranches.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveUnnecessaryBranches</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Simplify program structure by pulling if or else statement body out |
| (removing the if statement block ifself) in order to allow intra-procedure |
| analysis to propagate exact statistics.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteRemoveUnnecessaryCasts.html" title="class in org.apache.sysds.hops.rewrite">RewriteRemoveUnnecessaryCasts</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: RemoveUnnecessaryCasts.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteSplitDagDataDependentOperators.html" title="class in org.apache.sysds.hops.rewrite">RewriteSplitDagDataDependentOperators</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Split Hop DAG after specific data-dependent operators.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="RewriteSplitDagUnknownCSVRead.html" title="class in org.apache.sysds.hops.rewrite">RewriteSplitDagUnknownCSVRead</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Split Hop DAG after CSV reads with unknown size.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="RewriteTransientWriteParentHandling.html" title="class in org.apache.sysds.hops.rewrite">RewriteTransientWriteParentHandling</a></th> |
| <td class="colLast"> |
| <div class="block">Rule: Eliminate for Transient Write DataHops to have no parents |
| Solution: Move parent edges of Transient Write Hop to parent of |
| its child |
| Reason: Transient Write not being a root messes up |
| analysis for Lop's to Instruction translation (according to Amol)</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="StatementBlockRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">StatementBlockRewriteRule</a></th> |
| <td class="colLast"> |
| <div class="block">Base class for all hop rewrites in order to enable generic |
| application of all rules.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
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| </ul> |
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