| /* |
| * Copyright 2007 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; |
| |
| import com.google.gwt.dev.jjs.ast.Context; |
| import com.google.gwt.dev.jjs.ast.JMethod; |
| import com.google.gwt.dev.jjs.ast.JMethodCall; |
| import com.google.gwt.dev.jjs.ast.JProgram; |
| import com.google.gwt.dev.jjs.ast.JType; |
| import com.google.gwt.dev.util.log.speedtracer.CompilerEventType; |
| import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger; |
| import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger.Event; |
| import com.google.gwt.thirdparty.guava.common.annotations.VisibleForTesting; |
| |
| import java.util.List; |
| |
| /** |
| * For each JMethodCall that contains a specialization, retarget the method |
| * to the specialized call if possible. Depends on call tightening, |
| * staticizing, and finalizing having been successful on the |
| * method of interest. |
| */ |
| public class MethodCallSpecializer { |
| |
| private class MethodCallSpecializingVisitor extends JChangeTrackingVisitor { |
| |
| public MethodCallSpecializingVisitor(OptimizerContext optimizerCtx) { |
| super(optimizerCtx); |
| } |
| |
| @Override |
| public void endVisit(JMethodCall x, Context ctx) { |
| // Don't do anything if the method binding isn't statically known |
| if (!x.getTarget().isStatic()) { |
| return; |
| } |
| |
| JMethod method = x.getTarget(); |
| JMethod.Specialization specialization = method.getSpecialization(); |
| |
| if (specialization == null) { |
| return; |
| } |
| |
| List<JType> params = specialization.getParams(); |
| if (params.size() == x.getArgs().size()) { |
| for (int i = 0; i < params.size(); i++) { |
| JType argType = x.getArgs().get(i).getType().getUnderlyingType(); |
| |
| if (argType.isNullType()) { |
| return; |
| } |
| // see if the args passed to the function can be cast to the |
| // specialization pattern |
| JType qType = params.get(i).getUnderlyingType(); |
| |
| if (!program.typeOracle.castSucceedsTrivially(argType, qType)) { |
| // params don't match |
| return; |
| } |
| } |
| |
| JMethod targetMethod = specialization.getTargetMethod(); |
| if (targetMethod != null) { |
| JMethodCall call = new JMethodCall(x.getSourceInfo(), |
| x.getInstance(), targetMethod); |
| call.addArgs(x.getArgs()); |
| ctx.replaceMe(call); |
| } |
| } |
| } |
| } |
| |
| public static final String NAME = MethodCallSpecializer.class.getSimpleName(); |
| |
| @VisibleForTesting |
| static OptimizerStats exec(JProgram program) { |
| return exec(program, OptimizerContext.NULL_OPTIMIZATION_CONTEXT); |
| } |
| |
| public static OptimizerStats exec(JProgram program, OptimizerContext optimizerCtx) { |
| Event optimizeEvent = SpeedTracerLogger.start(CompilerEventType.OPTIMIZE, "optimizer", NAME); |
| OptimizerStats stats = new MethodCallSpecializer(program).execImpl(optimizerCtx); |
| optimizerCtx.incOptimizationStep(); |
| optimizeEvent.end("didChange", "" + stats.didChange()); |
| return stats; |
| } |
| |
| private final JProgram program; |
| |
| private MethodCallSpecializer(JProgram program) { |
| this.program = program; |
| } |
| |
| private OptimizerStats execImpl(OptimizerContext optimizerCtx) { |
| MethodCallSpecializingVisitor specializer = new MethodCallSpecializingVisitor(optimizerCtx); |
| specializer.accept(program); |
| JavaAstVerifier.assertProgramIsConsistent(program); |
| return new OptimizerStats(NAME).recordModified(specializer.getNumMods()); |
| } |
| } |