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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.sysds.hops.rewrite</a></div> |
| <h2 title="Class RewriteRemoveUnnecessaryCasts" class="title">Class RewriteRemoveUnnecessaryCasts</h2> |
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| <li> |
| <ul class="inheritance"> |
| <li><a href="HopRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">org.apache.sysds.hops.rewrite.HopRewriteRule</a></li> |
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| <pre>public class <span class="typeNameLabel">RewriteRemoveUnnecessaryCasts</span> |
| extends <a href="HopRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">HopRewriteRule</a></pre> |
| <div class="block">Rule: RemoveUnnecessaryCasts. For all value type casts check |
| if they are really necessary. If both cast input and output |
| type are the same, the cast itself is redundant. |
| |
| There are two use case where this can arise: (1) automatically |
| inserted casts on function inlining (in case of unknown value |
| types), and (2) explicit script-level value type casts, that |
| might be redundant according to the read input data. |
| |
| The benefit of this rewrite is negligible for scalars. However, |
| when we support matrices with different value types, those casts |
| might refer to matrices and with that incur large costs.</div> |
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| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">RewriteRemoveUnnecessaryCasts</a></span>()</code></th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rewriteHopDAG(org.apache.sysds.hops.Hop,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">rewriteHopDAG</a></span>​(<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a> root, |
| <a href="ProgramRewriteStatus.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriteStatus</a> state)</code></th> |
| <td class="colLast"> |
| <div class="block">Handle a predicate hop DAG with exactly one root.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html?is-external=true" title="class or interface in java.util" class="externalLink">ArrayList</a><<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rewriteHopDAGs(java.util.ArrayList,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">rewriteHopDAGs</a></span>​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html?is-external=true" title="class or interface in java.util" class="externalLink">ArrayList</a><<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a>> roots, |
| <a href="ProgramRewriteStatus.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriteStatus</a> state)</code></th> |
| <td class="colLast"> |
| <div class="block">Handle a generic (last-level) hop DAG with multiple roots.</div> |
| </td> |
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| <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></li> |
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| <h4>RewriteRemoveUnnecessaryCasts</h4> |
| <pre>public RewriteRemoveUnnecessaryCasts()</pre> |
| </li> |
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| </li> |
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| </section> |
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| <h3>Method Detail</h3> |
| <a id="rewriteHopDAGs(java.util.ArrayList,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>rewriteHopDAGs</h4> |
| <pre class="methodSignature">public <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html?is-external=true" title="class or interface in java.util" class="externalLink">ArrayList</a><<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a>> rewriteHopDAGs​(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ArrayList.html?is-external=true" title="class or interface in java.util" class="externalLink">ArrayList</a><<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a>> roots, |
| <a href="ProgramRewriteStatus.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriteStatus</a> state)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="HopRewriteRule.html#rewriteHopDAGs(java.util.ArrayList,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">HopRewriteRule</a></code></span></div> |
| <div class="block">Handle a generic (last-level) hop DAG with multiple roots.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="HopRewriteRule.html#rewriteHopDAGs(java.util.ArrayList,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">rewriteHopDAGs</a></code> in class <code><a href="HopRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">HopRewriteRule</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>roots</code> - high-level operator roots</dd> |
| <dd><code>state</code> - program rewrite status</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>list of high-level operators</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="rewriteHopDAG(org.apache.sysds.hops.Hop,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>rewriteHopDAG</h4> |
| <pre class="methodSignature">public <a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a> rewriteHopDAG​(<a href="../Hop.html" title="class in org.apache.sysds.hops">Hop</a> root, |
| <a href="ProgramRewriteStatus.html" title="class in org.apache.sysds.hops.rewrite">ProgramRewriteStatus</a> state)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="HopRewriteRule.html#rewriteHopDAG(org.apache.sysds.hops.Hop,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">HopRewriteRule</a></code></span></div> |
| <div class="block">Handle a predicate hop DAG with exactly one root.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="HopRewriteRule.html#rewriteHopDAG(org.apache.sysds.hops.Hop,org.apache.sysds.hops.rewrite.ProgramRewriteStatus)">rewriteHopDAG</a></code> in class <code><a href="HopRewriteRule.html" title="class in org.apache.sysds.hops.rewrite">HopRewriteRule</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>root</code> - high-level operator root</dd> |
| <dd><code>state</code> - program rewrite status</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>high-level operator</dd> |
| </dl> |
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