| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sysds.hops.ipa; |
| |
| |
| import org.apache.sysds.hops.HopsException; |
| import org.apache.sysds.hops.rewrite.ProgramRewriteStatus; |
| import org.apache.sysds.hops.rewrite.ProgramRewriter; |
| import org.apache.sysds.hops.rewrite.RewriteInjectSparkLoopCheckpointing; |
| import org.apache.sysds.parser.DMLProgram; |
| import org.apache.sysds.parser.LanguageException; |
| |
| /** |
| * This rewrite applies static hop dag and statement block |
| * rewrites such as constant folding and branch removal |
| * in order to simplify statistic propagation. |
| * |
| */ |
| public class IPAPassApplyStaticAndDynamicHopRewrites extends IPAPass |
| { |
| @Override |
| @SuppressWarnings("unused") |
| public boolean isApplicable(FunctionCallGraph fgraph) { |
| return InterProceduralAnalysis.APPLY_STATIC_REWRITES |
| || InterProceduralAnalysis.APPLY_DYNAMIC_REWRITES; |
| } |
| |
| @Override |
| public boolean rewriteProgram( DMLProgram prog, FunctionCallGraph fgraph, FunctionCallSizeInfo fcallSizes ) { |
| try { |
| // construct rewriter w/o checkpoint injection to avoid redundancy |
| ProgramRewriter rewriter = new ProgramRewriter( |
| InterProceduralAnalysis.APPLY_STATIC_REWRITES, |
| InterProceduralAnalysis.APPLY_DYNAMIC_REWRITES); |
| rewriter.removeStatementBlockRewrite(RewriteInjectSparkLoopCheckpointing.class); |
| |
| // rewrite program hop dags and statement blocks |
| ProgramRewriteStatus status = new ProgramRewriteStatus(); |
| rewriter.rewriteProgramHopDAGs(prog, true, status); //rewrite and split |
| // in case of removed branches entire function calls might have been eliminated, |
| // accordingly, we should rebuild the function call graph to allow for inlining |
| // even large functions, and avoid restrictions of scalar/size propagation |
| return status.getRemovedBranches(); |
| } |
| catch (LanguageException ex) { |
| throw new HopsException(ex); |
| } |
| } |
| } |