| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.dev.jjs.impl.gflow.constants; |
| |
| import com.google.gwt.dev.jjs.impl.gflow.AssumptionMap; |
| import com.google.gwt.dev.jjs.impl.gflow.IntegratedFlowFunction; |
| import com.google.gwt.dev.jjs.impl.gflow.TransformationFunction.Transformation; |
| import com.google.gwt.dev.jjs.impl.gflow.cfg.Cfg; |
| import com.google.gwt.dev.jjs.impl.gflow.cfg.CfgEdge; |
| import com.google.gwt.dev.jjs.impl.gflow.cfg.CfgNode; |
| import com.google.gwt.dev.jjs.impl.gflow.cfg.CfgTransformer; |
| |
| /** |
| * Integrated flow function for ConstantsAnalysis. First try a transformation, |
| * fall back to flow function if no transformation is possible. |
| */ |
| public class ConstantsIntegratedFlowFunction |
| implements |
| IntegratedFlowFunction<CfgNode<?>, CfgEdge, CfgTransformer, Cfg, ConstantsAssumption> { |
| private static final ConstantsFlowFunction FLOW_FUNCTION = new ConstantsFlowFunction(); |
| |
| private final ConstantsTransformationFunction transformationFunction; |
| |
| public ConstantsIntegratedFlowFunction() { |
| transformationFunction = new ConstantsTransformationFunction(); |
| } |
| |
| public Transformation<CfgTransformer, Cfg> interpretOrReplace( |
| CfgNode<?> node, Cfg graph, |
| AssumptionMap<CfgEdge, ConstantsAssumption> assumptionMap) { |
| Transformation<CfgTransformer, Cfg> transformation = transformationFunction.transform( |
| node, graph, assumptionMap); |
| if (transformation != null) { |
| return transformation; |
| } |
| FLOW_FUNCTION.interpret(node, graph, assumptionMap); |
| return null; |
| } |
| |
| } |