Examples of com.google.gwt.dev.jjs.impl.ControlFlowAnalyzer$RescueVisitor

com.google.gwt.dev.jjs.impl.ControlFlowAnalyzer
Marks as "referenced" any types, methods, and fields that are reachable. Also marks as "instantiable" any the classes and interfaces that can possibly be instantiated. TODO(later): make RescueVisitor use less stack?

   * Map each program atom as exclusive to some split point, whenever possible.
   * Also fixes up load order problems that could result from splitting code
   * based on this assumption.
   */
  private ExclusivityMap computeExclusivityMapWithFixups(Collection<Fragment> exclusiveFragments) {
    ControlFlowAnalyzer completeCfa = computeCompleteCfa();
    Map<Fragment, ControlFlowAnalyzer> notLiveCfaByFragment =
        computeComplementCfaForFragments(exclusiveFragments);
    ExclusivityMap exclusivityMap =  ExclusivityMap.computeExclusivityMap(exclusiveFragments,
        completeCfa, notLiveCfaByFragment);
    exclusivityMap.fixUpLoadOrderDependencies(logger, jprogram, methodsInJavaScript);

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    /*
     * Compute the base fragments, for split points in the initial load
     * sequence.
     */
    initialSequenceCfa = new ControlFlowAnalyzer(initiallyLiveCfa);
    String extendsCfa = "initial";
    List<Integer> initialFragmentNumberSequence = new ArrayList<Integer>();
    for (JRunAsync runAsync : initialLoadSequence) {
      LivenessPredicate alreadyLoaded = new CfaLivenessPredicate(initialSequenceCfa);


      String depGraphName = "sp" + runAsync.getRunAsyncId();
      dependencyRecorder.startDependencyGraph(depGraphName, extendsCfa);
      extendsCfa = depGraphName;


      ControlFlowAnalyzer liveAfterSp = new ControlFlowAnalyzer(initialSequenceCfa);
      liveAfterSp.traverseFromRunAsync(runAsync);
      dependencyRecorder.endDependencyGraph();


      LivenessPredicate liveNow = new CfaLivenessPredicate(liveAfterSp);


      Fragment fragment = new Fragment(Fragment.Type.INITIAL, lastInitialFragment);

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    }
    allFields.addAll(completeCfa.getFieldsWritten());


    for (Fragment fragment : exclusiveFragments) {
      assert fragment.isExclusive();
      ControlFlowAnalyzer notLiveInFragment = notLiveCfaByFragment.get(fragment);
      Set<JNode> allLiveNodes =
          Sets.union(notLiveInFragment.getLiveFieldsAndMethods(),
              notLiveInFragment.getFieldsWritten());
      updateFields(fragment, allLiveNodes, allFields);
      updateMethods(fragment, notLiveInFragment.getLiveFieldsAndMethods(),
          allMethods);
      updateStrings(fragment, notLiveInFragment.getLiveStrings(), completeCfa
          .getLiveStrings());
      updateTypes(fragment,
          declaredTypesIn(notLiveInFragment.getInstantiatedTypes()),
          declaredTypesIn(completeCfa.getInstantiatedTypes()));
    }
  }

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  public void recordLiveSubsetsAndEstimateTheirSizes(
      ControlFlowAnalyzer initialSequenceCfa, Collection<Collection<JRunAsync>> groupedRunAsyncs) {
    this.groupedRunAsyncs = groupedRunAsyncs;
    for (Collection<JRunAsync> runAsyncGroup : groupedRunAsyncs) {
      for (JRunAsync runAsync : runAsyncGroup) {
        ControlFlowAnalyzer withRunAsyncCfa = new ControlFlowAnalyzer(initialSequenceCfa);
        withRunAsyncCfa.traverseFromRunAsync(runAsync);
        recordLiveSubset(withRunAsyncCfa, runAsync);
      }
    }
    accumulatePayloadSizes();
  }

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  protected void recordDependenciesImpl(TreeLogger logger, JProgram jprogram) {


    logger = logger.branch(TreeLogger.DEBUG,
        "Creating dependencies file for the compile report");


    ControlFlowAnalyzer dependencyAnalyzer = new ControlFlowAnalyzer(jprogram);
    dependencyAnalyzer.setDependencyRecorder(this);


    try {
      printPre();
      for (JMethod method : jprogram.getAllEntryMethods()) {
        dependencyAnalyzer.traverseFrom(method);
        maybeFlushOutput();
      }
      printPost();


      flushOutput();

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      OutputStream out) {
    DependencyRecorder deps = new DependencyRecorder(out);
    deps.open();
    deps.startDependencyGraph("initial", null);


    ControlFlowAnalyzer cfa = new ControlFlowAnalyzer(program);
    cfa.setDependencyRecorder(deps);
    for (List<JMethod> entryList : program.entryMethods) {
      for (JMethod entry : entryList) {
        cfa.traverseFrom(entry);
      }
    }


    deps.endDependencyGraph();
    deps.close();

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    for (Fragment fragment : exclusiveFragments) {
      assert fragment.isExclusive();


      dependencyRecorder.startDependencyGraph("sp" + fragment.getFragmentId(),
          dependencyGraphNameAfterInitialSequence);
      ControlFlowAnalyzer cfa = new ControlFlowAnalyzer(initialSequenceCfa);
      cfa.setDependencyRecorder(dependencyRecorder);
      for (Fragment otherFragment : exclusiveFragments) {
        // don't trace the initial fragments as they have already been traced and their atoms are
        // already in {@code initialSequenceCfa}
        if (otherFragment.isInitial()) {
          continue;
        }
        if (otherFragment == fragment) {
          continue;
        }
        for (JRunAsync otherRunAsync : otherFragment.getRunAsyncs()) {
          cfa.traverseFromRunAsync(otherRunAsync);
        }
      }
      dependencyRecorder.endDependencyGraph();
      notLiveCfaByFragment.put(fragment, cfa);
    }

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  /**
   * Compute a CFA that covers the entire live code of the program.
   */
  private ControlFlowAnalyzer computeCompleteCfa() {
    dependencyRecorder.startDependencyGraph("total", null);
    ControlFlowAnalyzer completeCfa = new ControlFlowAnalyzer(jprogram);
    completeCfa.setDependencyRecorder(dependencyRecorder);
    completeCfa.traverseEverything();
    dependencyRecorder.endDependencyGraph();
    return completeCfa;
  }

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   * Map each program atom as exclusive to some split point, whenever possible.
   * Also fixes up load order problems that could result from splitting code
   * based on this assumption.
   */
  private ExclusivityMap computeExclusivityMapWithFixups(Collection<Fragment> exclusiveFragments) {
    ControlFlowAnalyzer completeCfa = computeCompleteCfa();
    Map<Fragment, ControlFlowAnalyzer> notLiveCfaByFragment =
        computeComplementCfaForFragments(exclusiveFragments);
    ExclusivityMap exclusivityMap =  ExclusivityMap.computeExclusivityMap(exclusiveFragments,
        completeCfa, notLiveCfaByFragment);
    exclusivityMap.fixUpLoadOrderDependencies(logger, jprogram, methodsInJavaScript);

View Full Code Here


    /*
     * Compute the base fragments, for split points in the initial load
     * sequence.
     */
    initialSequenceCfa = new ControlFlowAnalyzer(initiallyLiveCfa);
    String extendsCfa = "initial";
    List<Integer> initialFragmentNumberSequence = new ArrayList<Integer>();
    for (JRunAsync runAsync : initialLoadSequence) {
      LivenessPredicate alreadyLoaded = new CfaLivenessPredicate(initialSequenceCfa);


      String depGraphName = "sp" + runAsync.getRunAsyncId();
      dependencyRecorder.startDependencyGraph(depGraphName, extendsCfa);
      extendsCfa = depGraphName;


      ControlFlowAnalyzer liveAfterSp = new ControlFlowAnalyzer(initialSequenceCfa);
      liveAfterSp.traverseFromRunAsync(runAsync);
      dependencyRecorder.endDependencyGraph();


      LivenessPredicate liveNow = new CfaLivenessPredicate(liveAfterSp);


      Fragment fragment = new Fragment(Fragment.Type.INITIAL, lastInitialFragment);

View Full Code Here

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