JS: render all declarations into one remembered fragment, then output this fragment to real output

core/src/main/java/org/teavm/backend/javascript/JavaScriptTarget.java

@@ -16,7 +16,6 @@
 package org.teavm.backend.javascript;
 
 import com.carrotsearch.hppc.ObjectIntHashMap;
-import com.carrotsearch.hppc.ObjectIntMap;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
@@ -24,7 +23,6 @@ import java.io.Writer;
 import java.lang.ref.Reference;
 import java.lang.ref.ReferenceQueue;
 import java.lang.ref.WeakReference;
-import java.lang.reflect.InvocationTargetException;
 import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
@@ -37,30 +35,24 @@ import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Properties;
 import java.util.Set;
 import java.util.function.Function;
-import org.teavm.ast.AsyncMethodNode;
 import org.teavm.ast.ControlFlowEntry;
-import org.teavm.ast.MethodNode;
-import org.teavm.ast.RegularMethodNode;
-import org.teavm.ast.analysis.LocationGraphBuilder;
-import org.teavm.ast.decompilation.DecompilationException;
-import org.teavm.ast.decompilation.Decompiler;
 import org.teavm.backend.javascript.codegen.AliasProvider;
 import org.teavm.backend.javascript.codegen.DefaultAliasProvider;
 import org.teavm.backend.javascript.codegen.DefaultNamingStrategy;
 import org.teavm.backend.javascript.codegen.MinifyingAliasProvider;
+import org.teavm.backend.javascript.codegen.OutputSourceWriter;
 import org.teavm.backend.javascript.codegen.OutputSourceWriterBuilder;
+import org.teavm.backend.javascript.codegen.RememberedSource;
+import org.teavm.backend.javascript.codegen.RememberingSourceWriter;
 import org.teavm.backend.javascript.codegen.SourceWriter;
-import org.teavm.backend.javascript.decompile.PreparedClass;
-import org.teavm.backend.javascript.decompile.PreparedMethod;
 import org.teavm.backend.javascript.intrinsics.ref.ReferenceQueueGenerator;
 import org.teavm.backend.javascript.intrinsics.ref.ReferenceQueueTransformer;
 import org.teavm.backend.javascript.intrinsics.ref.WeakReferenceDependencyListener;
 import org.teavm.backend.javascript.intrinsics.ref.WeakReferenceGenerator;
 import org.teavm.backend.javascript.intrinsics.ref.WeakReferenceTransformer;
-import org.teavm.backend.javascript.rendering.MethodBodyRenderer;
+import org.teavm.backend.javascript.rendering.NameFrequencyEstimator;
 import org.teavm.backend.javascript.rendering.Renderer;
 import org.teavm.backend.javascript.rendering.RenderingContext;
 import org.teavm.backend.javascript.rendering.RenderingUtil;
@@ -72,29 +64,21 @@ import org.teavm.backend.javascript.spi.Injector;
 import org.teavm.backend.javascript.spi.VirtualMethodContributor;
 import org.teavm.backend.javascript.spi.VirtualMethodContributorContext;
 import org.teavm.backend.javascript.templating.JavaScriptTemplateFactory;
-import org.teavm.cache.AstCacheEntry;
-import org.teavm.cache.AstDependencyExtractor;
-import org.teavm.cache.CacheStatus;
 import org.teavm.cache.EmptyMethodNodeCache;
 import org.teavm.cache.MethodNodeCache;
-import org.teavm.common.ServiceRepository;
 import org.teavm.debugging.information.DebugInformationEmitter;
 import org.teavm.debugging.information.DummyDebugInformationEmitter;
 import org.teavm.debugging.information.SourceLocation;
 import org.teavm.dependency.AbstractDependencyListener;
 import org.teavm.dependency.DependencyAgent;
 import org.teavm.dependency.DependencyAnalyzer;
-import org.teavm.dependency.DependencyInfo;
 import org.teavm.dependency.DependencyListener;
 import org.teavm.dependency.DependencyType;
 import org.teavm.dependency.MethodDependency;
 import org.teavm.interop.PlatformMarker;
 import org.teavm.interop.Platforms;
-import org.teavm.model.AnnotationHolder;
 import org.teavm.model.BasicBlock;
 import org.teavm.model.CallLocation;
-import org.teavm.model.ClassHolder;
-import org.teavm.model.ClassHolderSource;
 import org.teavm.model.ClassHolderTransformer;
 import org.teavm.model.ClassReaderSource;
 import org.teavm.model.ElementModifier;
@@ -115,8 +99,6 @@ import org.teavm.model.instructions.StringConstantInstruction;
 import org.teavm.model.transformation.BoundCheckInsertion;
 import org.teavm.model.transformation.NullCheckFilter;
 import org.teavm.model.transformation.NullCheckInsertion;
-import org.teavm.model.util.AsyncMethodFinder;
-import org.teavm.model.util.ProgramUtils;
 import org.teavm.vm.BuildTarget;
 import org.teavm.vm.RenderingException;
 import org.teavm.vm.TeaVMTarget;
@@ -141,18 +123,13 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
     private DebugInformationEmitter debugEmitter;
     private MethodNodeCache astCache = EmptyMethodNodeCache.INSTANCE;
     private final Set<MethodReference> asyncMethods = new HashSet<>();
-    private final Set<MethodReference> asyncFamilyMethods = new HashSet<>();
     private List<VirtualMethodContributor> customVirtualMethods = new ArrayList<>();
     private int topLevelNameLimit = 500000;
-    private AstDependencyExtractor dependencyExtractor = new AstDependencyExtractor();
     private boolean strict;
     private BoundCheckInsertion boundCheckInsertion = new BoundCheckInsertion();
     private NullCheckInsertion nullCheckInsertion = new NullCheckInsertion(NullCheckFilter.EMPTY);
     private final Map<String, String> importedModules = new LinkedHashMap<>();
-    private Map<String, Generator> generatorCache = new HashMap<>();
     private JavaScriptTemplateFactory templateFactory;
-    private boolean threadLibraryUsed;
-    private MethodBodyRenderer bodyRenderer;
 
     @Override
     public List<ClassHolderTransformer> getTransformers() {
@@ -422,71 +399,47 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
         };
         renderingContext.setMinifying(obfuscated);
 
-        bodyRenderer = new MethodBodyRenderer(renderingContext, controller.getDiagnostics(), obfuscated,
-                debugEmitter != null, asyncMethods);
-
-        var clsNodes = modelToAst(classes, renderingContext);
         if (controller.wasCancelled()) {
             return;
         }
 
         var builder = new OutputSourceWriterBuilder(naming);
         builder.setMinified(obfuscated);
-        var sourceWriter = builder.build(writer);
 
-        sourceWriter.setDebugInformationEmitter(debugEmitterToUse);
+        for (var className : classes.getClassNames()) {
-
+            var cls = classes.get(className);
-        var renderer = new Renderer(sourceWriter, asyncMethods, asyncFamilyMethods, renderingContext);
+            for (var method : cls.getMethods()) {
-        RuntimeRenderer runtimeRenderer = new RuntimeRenderer(classes, sourceWriter);
+                preprocessNativeMethod(method);
-        renderer.setProperties(controller.getProperties());
-        renderer.setMinifying(obfuscated);
-        renderer.setProgressConsumer(controller::reportProgress);
-        if (debugEmitter != null) {
-            for (PreparedClass preparedClass : clsNodes) {
-                for (PreparedMethod preparedMethod : preparedClass.getMethods()) {
-                    if (preparedMethod.cfg != null) {
-                        emitCFG(debugEmitter, preparedMethod.cfg);
-                    }
-                }
-                if (controller.wasCancelled()) {
-                    return;
-                }
             }
-            renderer.setDebugEmitter(debugEmitter);
         }
-        renderer.prepare(clsNodes);
+        for (var entry : methodInjectors.entrySet()) {
+            renderingContext.addInjector(entry.getKey(), entry.getValue());
+        }
 
-        printWrapperStart(sourceWriter);
+        var rememberingWriter = new RememberingSourceWriter(debugEmitter != null);
+        var renderer = new Renderer(rememberingWriter, asyncMethods, renderingContext, controller.getDiagnostics(),
+                methodGenerators, astCache, controller.getCacheStatus(), templateFactory);
+        renderer.setProperties(controller.getProperties());
+        renderer.setProgressConsumer(controller::reportProgress);
 
-        for (RendererListener listener : rendererListeners) {
+        for (var listener : rendererListeners) {
             listener.begin(renderer, target);
         }
-        int start = sourceWriter.getOffset();
+        if (!renderer.render(classes, controller.isFriendlyToDebugger())) {
-
-        runtimeRenderer.renderRuntime();
-        sourceWriter.append("var ").append(renderer.getNaming().getScopeName()).ws().append("=").ws()
-                .append("Object.create(null);").newLine();
-        if (!renderer.render(clsNodes)) {
             return;
         }
-        runtimeRenderer.renderHandWrittenRuntime("array.js");
+        var declarations = rememberingWriter.save();
+        rememberingWriter.clear();
+
         renderer.renderStringPool();
         renderer.renderStringConstants();
         renderer.renderCompatibilityStubs();
-
-        runtimeRenderer.renderHandWrittenRuntime("long.js");
-        if (threadLibraryUsed) {
-            runtimeRenderer.renderHandWrittenRuntime("thread.js");
-        } else {
-            runtimeRenderer.renderHandWrittenRuntime("simpleThread.js");
-        }
-
         for (var entry : controller.getEntryPoints().entrySet()) {
-            sourceWriter.appendFunction("$rt_exports").append(".").append(entry.getKey()).ws().append("=").ws();
+            rememberingWriter.appendFunction("$rt_exports").append(".").append(entry.getKey()).ws().append("=").ws();
             var ref = entry.getValue().getMethod();
-            sourceWriter.appendFunction("$rt_mainStarter").append("(").appendMethodBody(ref);
+            rememberingWriter.appendFunction("$rt_mainStarter").append("(").appendMethodBody(ref);
-            sourceWriter.append(");").newLine();
+            rememberingWriter.append(");").newLine();
-            sourceWriter.appendFunction("$rt_exports").append(".").append(entry.getKey()).append(".")
+            rememberingWriter.appendFunction("$rt_exports").append(".").append(entry.getKey()).append(".")
                     .append("javaException").ws().append("=").ws().appendFunction("$rt_javaException")
                     .append(";").newLine();
         }
@@ -494,11 +447,36 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
         for (var listener : rendererListeners) {
             listener.complete();
         }
+        var epilogue = rememberingWriter.save();
+        rememberingWriter.clear();
+
+        var frequencyEstimator = new NameFrequencyEstimator();
+        declarations.replay(frequencyEstimator, RememberedSource.FILTER_REF);
+        epilogue.replay(frequencyEstimator, RememberedSource.FILTER_REF);
+        frequencyEstimator.apply(naming);
+
+        var sourceWriter = builder.build(writer);
+        sourceWriter.setDebugInformationEmitter(debugEmitterToUse);
+        printWrapperStart(sourceWriter);
+
+        int start = sourceWriter.getOffset();
+
+        RuntimeRenderer runtimeRenderer = new RuntimeRenderer(classes, sourceWriter);
+        runtimeRenderer.renderRuntime();
+        runtimeRenderer.renderHandWrittenRuntime("long.js");
+        if (renderer.isThreadLibraryUsed()) {
+            runtimeRenderer.renderHandWrittenRuntime("thread.js");
+        } else {
+            runtimeRenderer.renderHandWrittenRuntime("simpleThread.js");
+        }
+        declarations.write(sourceWriter, 0);
+        runtimeRenderer.renderHandWrittenRuntime("array.js");
+        epilogue.write(sourceWriter, 0);
 
         printWrapperEnd(sourceWriter);
 
         int totalSize = sourceWriter.getOffset() - start;
-        printStats(renderer, totalSize);
+        printStats(sourceWriter, totalSize);
     }
 
     private void printWrapperStart(SourceWriter writer) {
@@ -560,19 +538,21 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
         writer.outdent().append("}));").newLine();
     }
 
-    private void printStats(Renderer renderer, int totalSize) {
+    private void printStats(OutputSourceWriter writer, int totalSize) {
         if (!Boolean.parseBoolean(System.getProperty("teavm.js.stats", "false"))) {
             return;
         }
 
         System.out.println("Total output size: " + STATS_NUM_FORMAT.format(totalSize));
-        System.out.println("Metadata size: " + getSizeWithPercentage(renderer.getMetadataSize(), totalSize));
+        System.out.println("Metadata size: " + getSizeWithPercentage(
-        System.out.println("String pool size: " + getSizeWithPercentage(renderer.getStringPoolSize(), totalSize));
+                writer.getSectionSize(Renderer.SECTION_METADATA), totalSize));
+        System.out.println("String pool size: " + getSizeWithPercentage(
+                writer.getSectionSize(Renderer.SECTION_STRING_POOL), totalSize));
 
-        ObjectIntMap<String> packageSizeMap = new ObjectIntHashMap<>();
+        var packageSizeMap = new ObjectIntHashMap<String>();
-        for (String className : renderer.getClassesInStats()) {
+        for (String className : writer.getClassesInStats()) {
             String packageName = className.substring(0, className.lastIndexOf('.') + 1);
-            int classSize = renderer.getClassSize(className);
+            int classSize = writer.getClassSize(className);
             packageSizeMap.put(packageName, packageSizeMap.getOrDefault(packageName, 0) + classSize);
         }
 
@@ -588,222 +568,6 @@ public class JavaScriptTarget implements TeaVMTarget, TeaVMJavaScriptHost {
         return STATS_NUM_FORMAT.format(size) + " (" + STATS_PERCENT_FORMAT.format((double) size / totalSize) + ")";
     }
 
-    private List<PreparedClass> modelToAst(ListableClassHolderSource classes, RenderingContext context) {
-        AsyncMethodFinder asyncFinder = new AsyncMethodFinder(controller.getDependencyInfo().getCallGraph(),
-                controller.getDependencyInfo());
-        asyncFinder.find(classes);
-        asyncMethods.addAll(asyncFinder.getAsyncMethods());
-        asyncFamilyMethods.addAll(asyncFinder.getAsyncFamilyMethods());
-        Set<MethodReference> splitMethods = new HashSet<>(asyncMethods);
-        splitMethods.addAll(asyncFamilyMethods);
-
-        Decompiler decompiler = new Decompiler(classes, splitMethods, controller.isFriendlyToDebugger());
-
-        List<PreparedClass> classNodes = new ArrayList<>();
-        for (String className : getClassOrdering(classes)) {
-            ClassHolder cls = classes.get(className);
-            for (MethodHolder method : cls.getMethods()) {
-                preprocessNativeMethod(method);
-                if (controller.wasCancelled()) {
-                    break;
-                }
-            }
-        }
-        for (var entry : methodInjectors.entrySet()) {
-            context.addInjector(entry.getKey(), entry.getValue());
-        }
-        for (String className : getClassOrdering(classes)) {
-            ClassHolder cls = classes.get(className);
-            if (controller.wasCancelled()) {
-                break;
-            }
-            classNodes.add(prepare(decompiler, cls, classes));
-        }
-        return classNodes;
-    }
-
-    private List<String> getClassOrdering(ListableClassHolderSource classes) {
-        List<String> sequence = new ArrayList<>();
-        Set<String> visited = new HashSet<>();
-        for (String className : classes.getClassNames()) {
-            orderClasses(classes, className, visited, sequence);
-        }
-        return sequence;
-    }
-
-    private void orderClasses(ClassHolderSource classes, String className, Set<String> visited, List<String> order) {
-        if (!visited.add(className)) {
-            return;
-        }
-        ClassHolder cls = classes.get(className);
-        if (cls == null) {
-            return;
-        }
-        if (cls.getParent() != null) {
-            orderClasses(classes, cls.getParent(), visited, order);
-        }
-        for (String iface : cls.getInterfaces()) {
-            orderClasses(classes, iface, visited, order);
-        }
-        order.add(className);
-    }
-
-    private PreparedClass prepare(Decompiler decompiler, ClassHolder cls, ClassReaderSource classes) {
-        PreparedClass clsNode = new PreparedClass(cls);
-        for (MethodHolder method : cls.getMethods()) {
-            if (method.getModifiers().contains(ElementModifier.ABSTRACT)) {
-                continue;
-            }
-            if ((!isBootstrap() && method.getAnnotations().get(InjectedBy.class.getName()) != null)
-                    || methodInjectors.containsKey(method.getReference())) {
-                continue;
-            }
-            if (!method.hasModifier(ElementModifier.NATIVE) && !method.hasProgram()) {
-                continue;
-            }
-
-            PreparedMethod preparedMethod = method.hasModifier(ElementModifier.NATIVE)
-                    ? prepareNative(method, classes)
-                    : prepare(decompiler, method);
-            clsNode.getMethods().add(preparedMethod);
-        }
-        return clsNode;
-    }
-
-    private PreparedMethod prepareNative(MethodHolder method, ClassReaderSource classes) {
-        MethodReference reference = method.getReference();
-        Generator generator = methodGenerators.get(reference);
-        if (generator == null && !isBootstrap()) {
-            AnnotationHolder annotHolder = method.getAnnotations().get(GeneratedBy.class.getName());
-            if (annotHolder == null) {
-                throw new DecompilationException("Method " + method.getOwnerName() + "." + method.getDescriptor()
-                        + " is native, but no " + GeneratedBy.class.getName() + " annotation found");
-            }
-            ValueType annotValue = annotHolder.getValues().get("value").getJavaClass();
-            String generatorClassName = ((ValueType.Object) annotValue).getClassName();
-            generator = generatorCache.computeIfAbsent(generatorClassName,
-                    name -> createGenerator(name, method, classes));
-        }
-
-        var async = asyncMethods.contains(reference);
-        bodyRenderer.renderNative(generator, async, reference, method.getModifiers());
-        threadLibraryUsed |= bodyRenderer.isThreadLibraryUsed();
-        var result = new PreparedMethod(method.getLevel(), method.getModifiers(), method.getReference(),
-                bodyRenderer.getBody(), bodyRenderer.getParameters(), async, null, null);
-        bodyRenderer.clear();
-        return result;
-    }
-
-    private Generator createGenerator(String name, MethodHolder method, ClassReaderSource classes) {
-        Class<?> generatorClass;
-        try {
-            generatorClass = Class.forName(name, true, controller.getClassLoader());
-        } catch (ClassNotFoundException e) {
-            throw new DecompilationException("Error instantiating generator " + name
-                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor());
-        }
-
-        var constructors = generatorClass.getConstructors();
-        if (constructors.length != 1) {
-            throw new DecompilationException("Error instantiating generator " + name
-                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor());
-        }
-
-        var constructor = constructors[0];
-        var parameterTypes = constructor.getParameterTypes();
-        var arguments = new Object[parameterTypes.length];
-        for (var i = 0; i < arguments.length; ++i) {
-            var parameterType = parameterTypes[i];
-            if (parameterType.equals(ClassReaderSource.class)) {
-                arguments[i] = classes;
-            } else if (parameterType.equals(Properties.class)) {
-                arguments[i] = controller.getProperties();
-            } else if (parameterType.equals(DependencyInfo.class)) {
-                arguments[i] = controller.getDependencyInfo();
-            } else if (parameterType.equals(ServiceRepository.class)) {
-                arguments[i] = controller.getServices();
-            } else if (parameterType.equals(JavaScriptTemplateFactory.class)) {
-                arguments[i] = templateFactory;
-            } else {
-                var service = controller.getServices().getService(parameterType);
-                if (service == null) {
-                    throw new DecompilationException("Error instantiating generator " + name
-                            + " for native method " + method.getOwnerName() + "." + method.getDescriptor() + ". "
-                            + "Its constructor requires " + parameterType + " as its parameter #" + (i + 1)
-                            + " which is not available.");
-                }
-            }
-        }
-
-        try {
-            return (Generator) constructor.newInstance(arguments);
-        } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
-            throw new DecompilationException("Error instantiating generator " + name
-                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor(), e);
-        }
-    }
-
-    private PreparedMethod prepare(Decompiler decompiler, MethodHolder method) {
-        MethodReference reference = method.getReference();
-        ControlFlowEntry[] cfg;
-        MethodNode node;
-        var async = asyncMethods.contains(reference);
-        if (async) {
-            node = decompileAsync(decompiler, method);
-            cfg = ProgramUtils.getLocationCFG(method.getProgram());
-        } else {
-            var entry = decompileRegular(decompiler, method);
-            node = entry.method;
-            cfg = entry.cfg;
-        }
-        bodyRenderer.render(node, async);
-        var result = new PreparedMethod(method.getLevel(), method.getModifiers(), method.getReference(),
-                bodyRenderer.getBody(), bodyRenderer.getParameters(), async, cfg, bodyRenderer.getVariables());
-        threadLibraryUsed |= bodyRenderer.isThreadLibraryUsed();
-        bodyRenderer.clear();
-        return result;
-    }
-
-    private AstCacheEntry decompileRegular(Decompiler decompiler, MethodHolder method) {
-        if (astCache == null) {
-            return decompileRegularCacheMiss(decompiler, method);
-        }
-
-        CacheStatus cacheStatus = controller.getCacheStatus();
-        AstCacheEntry entry = !cacheStatus.isStaleMethod(method.getReference())
-                ? astCache.get(method.getReference(), cacheStatus)
-                : null;
-        if (entry == null) {
-            entry = decompileRegularCacheMiss(decompiler, method);
-            RegularMethodNode finalNode = entry.method;
-            astCache.store(method.getReference(), entry, () -> dependencyExtractor.extract(finalNode));
-        }
-        return entry;
-    }
-
-    private AstCacheEntry decompileRegularCacheMiss(Decompiler decompiler, MethodHolder method) {
-        RegularMethodNode node = decompiler.decompileRegular(method);
-        ControlFlowEntry[] cfg = LocationGraphBuilder.build(node.getBody());
-        return new AstCacheEntry(node, cfg);
-    }
-
-    private AsyncMethodNode decompileAsync(Decompiler decompiler, MethodHolder method) {
-        if (astCache == null) {
-            return decompiler.decompileAsync(method);
-        }
-
-        CacheStatus cacheStatus = controller.getCacheStatus();
-        AsyncMethodNode node = !cacheStatus.isStaleMethod(method.getReference())
-                ? astCache.getAsync(method.getReference(), cacheStatus)
-                : null;
-        if (node == null) {
-            node = decompiler.decompileAsync(method);
-            AsyncMethodNode finalNode = node;
-            astCache.storeAsync(method.getReference(), node, () -> dependencyExtractor.extract(finalNode));
-        }
-        return node;
-    }
-
     private void preprocessNativeMethod(MethodHolder method) {
         if (!method.getModifiers().contains(ElementModifier.NATIVE)
                 || methodGenerators.get(method.getReference()) != null

core/src/main/java/org/teavm/backend/javascript/codegen/NameFrequencyConsumer.java

@@ -1,40 +0,0 @@
-/*
- *  Copyright 2016 Alexey Andreev.
- *
- *  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 org.teavm.backend.javascript.codegen;
-
-import org.teavm.model.FieldReference;
-import org.teavm.model.MethodDescriptor;
-import org.teavm.model.MethodReference;
-
-public interface NameFrequencyConsumer {
-    void consume(MethodReference method);
-
-    void consumeInit(MethodReference method);
-
-    void consume(MethodDescriptor method);
-
-    void consume(String className);
-
-    void consumeClassInit(String className);
-
-    void consume(FieldReference field);
-
-    void consumeStatic(FieldReference field);
-
-    void consumeFunction(String name);
-
-    void consumeGlobal(String name);
-}

core/src/main/java/org/teavm/backend/javascript/codegen/NamingOrderer.java

@@ -1,148 +0,0 @@
-/*
- *  Copyright 2016 Alexey Andreev.
- *
- *  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 org.teavm.backend.javascript.codegen;
-
-import java.util.*;
-import org.teavm.model.FieldReference;
-import org.teavm.model.MethodDescriptor;
-import org.teavm.model.MethodReference;
-
-public class NamingOrderer implements NameFrequencyConsumer {
-    private Map<String, Entry> entries = new HashMap<>();
-    private Set<String> reservedNames = new HashSet<>();
-
-    @Override
-    public void consume(MethodReference method) {
-        String key = "R:" + method;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getFullNameFor(method);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-
-    @Override
-    public void consumeInit(MethodReference method) {
-        String key = "I:" + method;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameForInit(method);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consume(MethodDescriptor method) {
-        String key = "r:" + method;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameFor(method);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consume(String className) {
-        String key = "c:" + className;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameFor(className);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consumeClassInit(String className) {
-        String key = "C:" + className;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameForClassInit(className);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consume(FieldReference field) {
-        String key = "f:" + field;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameFor(field);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consumeStatic(FieldReference field) {
-        var key = "sf:" + field;
-        var entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getFullNameFor(field);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consumeFunction(String name) {
-        String key = "n:" + name;
-        Entry entry = entries.get(key);
-        if (entry == null) {
-            entry = new Entry();
-            entry.operation = naming -> naming.getNameForFunction(name);
-            entries.put(key, entry);
-        }
-        entry.frequency++;
-    }
-
-    @Override
-    public void consumeGlobal(String name) {
-        reservedNames.add(name);
-    }
-
-    public void apply(NamingStrategy naming) {
-        for (var name : reservedNames) {
-            naming.reserveName(name);
-        }
-        List<Entry> entryList = new ArrayList<>(entries.values());
-        Collections.sort(entryList, (o1, o2) -> Integer.compare(o2.frequency, o1.frequency));
-        for (Entry entry : entryList) {
-            entry.operation.perform(naming);
-        }
-    }
-
-    static class Entry {
-        NamingOperation operation;
-        int frequency;
-    }
-
-    interface NamingOperation {
-        void perform(NamingStrategy naming);
-    }
-}

core/src/main/java/org/teavm/backend/javascript/codegen/OutputSourceWriter.java

@@ -15,7 +15,13 @@
  */
 package org.teavm.backend.javascript.codegen;
 
+import com.carrotsearch.hppc.IntIntHashMap;
+import com.carrotsearch.hppc.IntIntMap;
+import com.carrotsearch.hppc.ObjectIntHashMap;
+import com.carrotsearch.hppc.ObjectIntMap;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
 import org.teavm.debugging.information.DebugInformationEmitter;
 import org.teavm.debugging.information.DummyDebugInformationEmitter;
 import org.teavm.model.FieldReference;
@@ -33,6 +39,12 @@ public class OutputSourceWriter extends SourceWriter implements LocationProvider
     private int line;
     private int offset;
     private DebugInformationEmitter debugInformationEmitter = new DummyDebugInformationEmitter();
+    private String classMarkClass;
+    private int classMarkPos;
+    private ObjectIntMap<String> classSizes = new ObjectIntHashMap<>();
+    private int sectionMarkSection = -1;
+    private int sectionMarkPos;
+    private IntIntMap sectionSizes = new IntIntHashMap();
 
     OutputSourceWriter(NamingStrategy naming, Appendable innerWriter, int lineWidth) {
         this.naming = naming;
@@ -140,9 +152,6 @@ public class OutputSourceWriter extends SourceWriter implements LocationProvider
     }
 
     private SourceWriter appendName(ScopedName name) {
-        if (name.scoped) {
-            append(naming.getScopeName()).append(".");
-        }
         append(name.value);
         return this;
     }
@@ -271,6 +280,12 @@ public class OutputSourceWriter extends SourceWriter implements LocationProvider
         return this;
     }
 
+    @Override
+    public SourceWriter emitVariables(String[] names, String jsName) {
+        debugInformationEmitter.emitVariable(names, jsName);
+        return this;
+    }
+
     @Override
     public void emitMethod(MethodDescriptor method) {
         debugInformationEmitter.emitMethod(method);
@@ -295,4 +310,56 @@ public class OutputSourceWriter extends SourceWriter implements LocationProvider
     public int getOffset() {
         return offset;
     }
+
+    @Override
+    public void markClassStart(String className) {
+        classMarkClass = className;
+        classMarkPos = offset;
+    }
+
+    @Override
+    public void markClassEnd() {
+        if (classMarkClass != null) {
+            var size = offset - classMarkPos;
+            if (size > 0) {
+                var currentSize = classSizes.get(classMarkClass);
+                classSizes.put(classMarkClass, currentSize + size);
+            }
+            classMarkClass = null;
+        }
+    }
+
+    @Override
+    public void markSectionStart(int id) {
+        sectionMarkSection = id;
+        sectionMarkPos = offset;
+    }
+
+    @Override
+    public void markSectionEnd() {
+        if (sectionMarkSection >= 0) {
+            int size = offset - sectionMarkPos;
+            if (size > 0) {
+                var currentSize = sectionSizes.get(sectionMarkSection);
+                sectionSizes.put(sectionMarkSection, currentSize + size);
+            }
+            sectionMarkSection = -1;
+        }
+    }
+
+    public Collection<String> getClassesInStats() {
+        var result = new ArrayList<String>();
+        for (var cursor : classSizes.keys()) {
+            result.add(cursor.value);
+        }
+        return result;
+    }
+
+    public int getClassSize(String className) {
+        return classSizes.get(className);
+    }
+
+    public int getSectionSize(int sectionId) {
+        return sectionSizes.get(sectionId);
+    }
 }

core/src/main/java/org/teavm/backend/javascript/codegen/RememberedSource.java

@@ -24,7 +24,8 @@ public class RememberedSource implements SourceFragment {
     public static final int FILTER_TEXT = 1;
     public static final int FILTER_REF = 2;
     public static final int FILTER_DEBUG = 4;
-    public static final int FILTER_ALL = FILTER_TEXT | FILTER_REF | FILTER_DEBUG;
+    public static final int FILTER_STATS = 8;
+    public static final int FILTER_ALL = FILTER_TEXT | FILTER_REF | FILTER_DEBUG | FILTER_STATS;
 
     private byte[] commands;
     private String chars;
@@ -196,6 +197,20 @@ public class RememberedSource implements SourceFragment {
                     }
                     break;
 
+                case RememberingSourceWriter.EMIT_VARIABLES:
+                    var count = intArgs[intArgIndex++];
+                    if ((filter & FILTER_DEBUG) != 0) {
+                        var names = new String[count];
+                        for (var i = 0; i < count; ++i) {
+                            names[i] = strings[intArgs[intArgIndex++]];
+                        }
+                        var jsName = strings[intArgs[intArgIndex++]];
+                        sink.emitVariables(names, jsName);
+                    } else {
+                        intArgIndex += count + 1;
+                    }
+                    break;
+
                 case RememberingSourceWriter.EMIT_CLASS:
                     if ((filter & FILTER_DEBUG) != 0) {
                         var classIndex = intArgs[intArgIndex];
@@ -211,6 +226,32 @@ public class RememberedSource implements SourceFragment {
                     }
                     intArgIndex++;
                     break;
+
+                case RememberingSourceWriter.MARK_CLASS_START:
+                    if ((filter & FILTER_STATS) != 0) {
+                        sink.markClassStart(strings[intArgs[intArgIndex]]);
+                    }
+                    intArgIndex++;
+                    break;
+
+                case RememberingSourceWriter.MARK_CLASS_END:
+                    if ((filter & FILTER_STATS) != 0) {
+                        sink.markClassEnd();
+                    }
+                    break;
+
+                case RememberingSourceWriter.MARK_SECTION_START:
+                    if ((filter & FILTER_STATS) != 0) {
+                        sink.markSectionStart(intArgs[intArgIndex]);
+                    }
+                    intArgIndex++;
+                    break;
+
+                case RememberingSourceWriter.MARK_SECTION_END:
+                    if ((filter & FILTER_STATS) != 0) {
+                        sink.markSectionEnd();
+                    }
+                    break;
             }
         }
     }

core/src/main/java/org/teavm/backend/javascript/codegen/RememberingSourceWriter.java

@@ -46,8 +46,13 @@ public class RememberingSourceWriter extends SourceWriter {
     static final byte ENTER_LOCATION = 16;
     static final byte EXIT_LOCATION = 17;
     static final byte EMIT_STATEMENT_START = 18;
+    static final byte EMIT_VARIABLES = 26;
     static final byte EMIT_METHOD = 19;
     static final byte EMIT_CLASS = 20;
+    static final byte MARK_CLASS_START = 22;
+    static final byte MARK_CLASS_END = 23;
+    static final byte MARK_SECTION_START = 24;
+    static final byte MARK_SECTION_END = 25;
 
     private boolean debug;
 
@@ -262,6 +267,20 @@ public class RememberingSourceWriter extends SourceWriter {
         return this;
     }
 
+    @Override
+    public SourceWriter emitVariables(String[] names, String jsName) {
+        if (debug) {
+            flush();
+            commands.add(EMIT_VARIABLES);
+            intArgs.add(names.length);
+            for (var name : names) {
+                appendStringArg(name);
+            }
+            appendStringArg(jsName);
+        }
+        return this;
+    }
+
     @Override
     public void emitMethod(MethodDescriptor method) {
         if (!debug) {
@@ -290,6 +309,32 @@ public class RememberingSourceWriter extends SourceWriter {
         }
     }
 
+    @Override
+    public void markClassStart(String className) {
+        flush();
+        commands.add(MARK_CLASS_START);
+        appendStringArg(className);
+    }
+
+    @Override
+    public void markClassEnd() {
+        flush();
+        commands.add(MARK_CLASS_END);
+    }
+
+    @Override
+    public void markSectionStart(int id) {
+        flush();
+        commands.add(MARK_SECTION_START);
+        intArgs.add(id);
+    }
+
+    @Override
+    public void markSectionEnd() {
+        flush();
+        commands.add(MARK_SECTION_END);
+    }
+
     public void flush() {
         if (lastWrittenChar == sb.length()) {
             return;

core/src/main/java/org/teavm/backend/javascript/codegen/SourceWriter.java

@@ -138,9 +138,24 @@ public abstract class SourceWriter implements Appendable, SourceWriterSink {
     @Override
     public abstract SourceWriter emitStatementStart();
 
+    @Override
+    public abstract SourceWriter emitVariables(String[] names, String jsName);
+
     @Override
     public abstract void emitMethod(MethodDescriptor method);
 
     @Override
     public abstract void emitClass(String className);
+
+    @Override
+    public abstract void markClassStart(String className);
+
+    @Override
+    public abstract void markClassEnd();
+
+    @Override
+    public abstract void markSectionStart(int id);
+
+    @Override
+    public abstract void markSectionEnd();
 }

core/src/main/java/org/teavm/backend/javascript/codegen/SourceWriterSink.java

@@ -104,9 +104,25 @@ public interface SourceWriterSink {
         return this;
     }
 
+    default SourceWriterSink emitVariables(String[] names, String jsName) {
+        return this;
+    }
+
     default void emitMethod(MethodDescriptor method) {
     }
 
     default void emitClass(String className) {
     }
+
+    default void markClassStart(String className) {
+    }
+
+    default void markClassEnd() {
+    }
+
+    default void markSectionStart(int id) {
+    }
+
+    default void markSectionEnd() {
+    }
 }

core/src/main/java/org/teavm/backend/javascript/decompile/PreparedClass.java

@@ -1,45 +0,0 @@
-/*
- *  Copyright 2019 Alexey Andreev.
- *
- *  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 org.teavm.backend.javascript.decompile;
-
-import java.util.ArrayList;
-import java.util.List;
-import org.teavm.model.ClassHolder;
-
-public class PreparedClass {
-    private ClassHolder classHolder;
-    private List<PreparedMethod> methods = new ArrayList<>();
-
-    public PreparedClass(ClassHolder classHolder) {
-        this.classHolder = classHolder;
-    }
-
-    public String getName() {
-        return classHolder.getName();
-    }
-
-    public String getParentName() {
-        return classHolder.getParent();
-    }
-
-    public List<PreparedMethod> getMethods() {
-        return methods;
-    }
-
-    public ClassHolder getClassHolder() {
-        return classHolder;
-    }
-}

core/src/main/java/org/teavm/backend/javascript/decompile/PreparedMethod.java

@@ -1,47 +0,0 @@
-/*
- *  Copyright 2019 Alexey Andreev.
- *
- *  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 org.teavm.backend.javascript.decompile;
-
-import java.util.Set;
-import org.teavm.ast.ControlFlowEntry;
-import org.teavm.backend.javascript.codegen.RememberedSource;
-import org.teavm.model.AccessLevel;
-import org.teavm.model.ElementModifier;
-import org.teavm.model.MethodReference;
-
-public class PreparedMethod {
-    public final AccessLevel accessLevel;
-    public final Set<ElementModifier> modifiers;
-    public final MethodReference reference;
-    public final RememberedSource body;
-    public final RememberedSource parameters;
-    public final boolean async;
-    public final ControlFlowEntry[] cfg;
-    public final PreparedVariable[] variables;
-
-    public PreparedMethod(AccessLevel accessLevel, Set<ElementModifier> modifiers, MethodReference reference,
-            RememberedSource body, RememberedSource parameters, boolean async, ControlFlowEntry[] cfg,
-            PreparedVariable[] variables) {
-        this.accessLevel = accessLevel;
-        this.modifiers = modifiers;
-        this.reference = reference;
-        this.body = body;
-        this.parameters = parameters;
-        this.async = async;
-        this.cfg = cfg;
-        this.variables = variables;
-    }
-}

core/src/main/java/org/teavm/backend/javascript/decompile/PreparedVariable.java

@@ -1,32 +0,0 @@
-/*
- *  Copyright 2023 Alexey Andreev.
- *
- *  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 org.teavm.backend.javascript.decompile;
-
-import org.teavm.debugging.information.DebugInformationEmitter;
-
-public class PreparedVariable {
-    public final String[] names;
-    public final String jsName;
-
-    public PreparedVariable(String[] names, String jsName) {
-        this.names = names;
-        this.jsName = jsName;
-    }
-
-    public void emit(DebugInformationEmitter emitter) {
-        emitter.emitVariable(names, jsName);
-    }
-}

core/src/main/java/org/teavm/backend/javascript/rendering/MethodBodyRenderer.java

@@ -25,10 +25,7 @@ import org.teavm.ast.MethodNode;
 import org.teavm.ast.MethodNodeVisitor;
 import org.teavm.ast.RegularMethodNode;
 import org.teavm.ast.VariableNode;
-import org.teavm.backend.javascript.codegen.RememberedSource;
-import org.teavm.backend.javascript.codegen.RememberingSourceWriter;
 import org.teavm.backend.javascript.codegen.SourceWriter;
-import org.teavm.backend.javascript.decompile.PreparedVariable;
 import org.teavm.backend.javascript.spi.Generator;
 import org.teavm.backend.javascript.spi.GeneratorContext;
 import org.teavm.dependency.DependencyInfo;
@@ -45,20 +42,17 @@ public class MethodBodyRenderer implements MethodNodeVisitor, GeneratorContext {
     private boolean minifying;
     private boolean async;
     private Set<MethodReference> asyncMethods;
-    private RememberingSourceWriter writer;
+    private SourceWriter writer;
     private StatementRenderer statementRenderer;
     private boolean threadLibraryUsed;
-    private RememberedSource body;
-    private RememberedSource parameters;
-    private PreparedVariable[] variables;
 
-    public MethodBodyRenderer(RenderingContext context, Diagnostics diagnostics, boolean minifying, boolean debug,
+    public MethodBodyRenderer(RenderingContext context, Diagnostics diagnostics, boolean minifying,
-            Set<MethodReference> asyncMethods) {
+            Set<MethodReference> asyncMethods, SourceWriter writer) {
         this.context = context;
         this.diagnostics = diagnostics;
         this.minifying = minifying;
         this.asyncMethods = asyncMethods;
-        writer = new RememberingSourceWriter(debug);
+        this.writer = writer;
         statementRenderer = new StatementRenderer(context, writer);
     }
 
@@ -71,15 +65,11 @@ public class MethodBodyRenderer implements MethodNodeVisitor, GeneratorContext {
         return context.getDependencyInfo();
     }
 
-    public void renderNative(Generator generator, boolean async, MethodReference reference,
+    public void renderNative(Generator generator, boolean async, MethodReference reference) {
-            Set<ElementModifier> modifiers) {
         threadLibraryUsed = false;
         this.async = async;
         statementRenderer.setAsync(async);
-        renderParameters(reference, modifiers);
         generator.generate(this, writer, reference);
-        body = writer.save();
-        writer.clear();
     }
 
     public void render(MethodNode node, boolean async) {
@@ -87,41 +77,18 @@ public class MethodBodyRenderer implements MethodNodeVisitor, GeneratorContext {
         this.async = async;
         statementRenderer.setAsync(async);
         statementRenderer.setCurrentMethod(node);
-        renderParameters(node.getReference(), node.getModifiers());
-        node.acceptVisitor(this);
-        body = writer.save();
         prepareVariables(node);
-        writer.clear();
+        node.acceptVisitor(this);
-    }
-
-    public PreparedVariable[] getVariables() {
-        return variables;
     }
 
     private void prepareVariables(MethodNode method) {
-        var variables = new ArrayList<PreparedVariable>();
         for (int i = 0; i < method.getVariables().size(); ++i) {
-            variables.add(new PreparedVariable(new String[] { method.getVariables().get(i).getName() },
+            writer.emitVariables(new String[] { method.getVariables().get(i).getName() },
-                    statementRenderer.variableName(i)));
+                    statementRenderer.variableName(i));
         }
-        this.variables = variables.toArray(new PreparedVariable[0]);
     }
 
-    public RememberedSource getBody() {
+    public void renderParameters(MethodReference reference, Set<ElementModifier> modifiers) {
-        return body;
-    }
-
-    public RememberedSource getParameters() {
-        return parameters;
-    }
-
-    public void clear() {
-        body = null;
-        parameters = null;
-        variables = null;
-    }
-
-    private void renderParameters(MethodReference reference, Set<ElementModifier> modifiers) {
         int startParam = 0;
         if (modifiers.contains(ElementModifier.STATIC)) {
             startParam = 1;
@@ -139,8 +106,6 @@ public class MethodBodyRenderer implements MethodNodeVisitor, GeneratorContext {
         if (count != 1) {
             writer.append(")");
         }
-        parameters = writer.save();
-        writer.clear();
     }
 
     private void appendMonitor(StatementRenderer statementRenderer, MethodNode methodNode) {

core/src/main/java/org/teavm/backend/javascript/rendering/NameFrequencyEstimator.java

@@ -15,22 +15,18 @@
  */
 package org.teavm.backend.javascript.rendering;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
-import org.teavm.backend.javascript.codegen.NameFrequencyConsumer;
+import org.teavm.backend.javascript.codegen.NamingStrategy;
-import org.teavm.backend.javascript.codegen.RememberedSource;
 import org.teavm.backend.javascript.codegen.SourceWriterSink;
-import org.teavm.backend.javascript.decompile.PreparedClass;
-import org.teavm.backend.javascript.decompile.PreparedMethod;
-import org.teavm.model.ClassReaderSource;
-import org.teavm.model.ElementModifier;
-import org.teavm.model.FieldHolder;
 import org.teavm.model.FieldReference;
 import org.teavm.model.MethodDescriptor;
-import org.teavm.model.MethodReader;
 import org.teavm.model.MethodReference;
-import org.teavm.model.ValueType;
 
-class NameFrequencyEstimator implements SourceWriterSink {
+public class NameFrequencyEstimator implements SourceWriterSink {
     static final MethodReference MONITOR_ENTER_METHOD = new MethodReference(Object.class,
             "monitorEnter", Object.class, void.class);
     static final MethodReference MONITOR_ENTER_SYNC_METHOD = new MethodReference(Object.class,
@@ -39,134 +35,137 @@ class NameFrequencyEstimator implements SourceWriterSink {
             "monitorExit", Object.class, void.class);
     static final MethodReference MONITOR_EXIT_SYNC_METHOD = new MethodReference(Object.class,
             "monitorExitSync", Object.class, void.class);
-    private static final MethodDescriptor CLINIT_METHOD = new MethodDescriptor("<clinit>", ValueType.VOID);
 
-    private final NameFrequencyConsumer consumer;
+    private Map<String, Entry> entries = new HashMap<>();
-    private final ClassReaderSource classSource;
+    private Set<String> reservedNames = new HashSet<>();
-    private final Set<MethodReference> asyncFamilyMethods;
-
-    NameFrequencyEstimator(NameFrequencyConsumer consumer, ClassReaderSource classSource,
-            Set<MethodReference> asyncFamilyMethods) {
-        this.consumer = consumer;
-        this.classSource = classSource;
-        this.asyncFamilyMethods = asyncFamilyMethods;
-    }
-
-    public void estimate(PreparedClass cls) {
-        // Declaration
-        consumer.consume(cls.getName());
-        if (cls.getParentName() != null) {
-            consumer.consume(cls.getParentName());
-        }
-        for (FieldHolder field : cls.getClassHolder().getFields()) {
-            consumer.consume(new FieldReference(cls.getName(), field.getName()));
-            if (field.getModifiers().contains(ElementModifier.STATIC)) {
-                consumer.consume(cls.getName());
-            }
-        }
-
-        // Methods
-        MethodReader clinit = classSource.get(cls.getName()).getMethod(CLINIT_METHOD);
-        for (PreparedMethod method : cls.getMethods()) {
-            consumer.consume(method.reference);
-            if (asyncFamilyMethods.contains(method.reference)) {
-                consumer.consume(method.reference);
-            }
-            if (clinit != null && (method.modifiers.contains(ElementModifier.STATIC)
-                    || method.reference.getName().equals("<init>"))) {
-                consumer.consume(method.reference);
-            }
-            if (!method.modifiers.contains(ElementModifier.STATIC)) {
-                consumer.consume(method.reference.getDescriptor());
-                consumer.consume(method.reference);
-            }
-            if (method.async) {
-                consumer.consumeFunction("$rt_nativeThread");
-                consumer.consumeFunction("$rt_nativeThread");
-                consumer.consumeFunction("$rt_resuming");
-                consumer.consumeFunction("$rt_invalidPointer");
-            }
-
-            method.body.replay(this, RememberedSource.FILTER_REF);
-        }
-
-        if (clinit != null) {
-            consumer.consumeFunction("$rt_eraseClinit");
-        }
-
-        // Metadata
-        consumer.consume(cls.getName());
-        consumer.consume(cls.getName());
-        if (cls.getParentName() != null) {
-            consumer.consume(cls.getParentName());
-        }
-        for (String iface : cls.getClassHolder().getInterfaces()) {
-            consumer.consume(iface);
-        }
-
-        boolean hasFields = false;
-        for (FieldHolder field : cls.getClassHolder().getFields()) {
-            if (!field.hasModifier(ElementModifier.STATIC)) {
-                hasFields = true;
-                break;
-            }
-        }
-        if (!hasFields) {
-            consumer.consumeFunction("$rt_classWithoutFields");
-        }
-    }
 
     @Override
     public SourceWriterSink appendClass(String cls) {
-        consumer.consume(cls);
+        var key = "c:" + cls;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameFor(cls);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendField(FieldReference field) {
-        consumer.consume(field);
+        var key = "f:" + field;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameFor(field);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendStaticField(FieldReference field) {
-        consumer.consumeStatic(field);
+        var key = "sf:" + field;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getFullNameFor(field);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendMethod(MethodDescriptor method) {
-        consumer.consume(method);
+        var key = "r:" + method;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameFor(method);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendMethodBody(MethodReference method) {
-        consumer.consume(method);
+        var key = "R:" + method;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getFullNameFor(method);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendFunction(String name) {
-        consumer.consumeFunction(name);
+        var key = "n:" + name;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameForFunction(name);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendGlobal(String name) {
-        consumer.consumeGlobal(name);
+        reservedNames.add(name);
         return this;
     }
 
     @Override
     public SourceWriterSink appendInit(MethodReference method) {
-        consumer.consumeInit(method);
+        var key = "I:" + method;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameForInit(method);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
 
     @Override
     public SourceWriterSink appendClassInit(String className) {
-        consumer.consumeClassInit(className);
+        var key = "C:" + className;
+        var entry = entries.get(key);
+        if (entry == null) {
+            entry = new Entry();
+            entry.operation = naming -> naming.getNameForClassInit(className);
+            entries.put(key, entry);
+        }
+        entry.frequency++;
         return this;
     }
+
+    public void apply(NamingStrategy naming) {
+        for (var name : reservedNames) {
+            naming.reserveName(name);
+        }
+        var entryList = new ArrayList<>(entries.values());
+        entryList.sort((o1, o2) -> Integer.compare(o2.frequency, o1.frequency));
+        for (var entry : entryList) {
+            entry.operation.perform(naming);
+        }
+    }
+
+    private static class Entry {
+        NamingOperation operation;
+        int frequency;
+    }
+
+    private interface NamingOperation {
+        void perform(NamingStrategy naming);
+    }
 }

core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java

@@ -17,6 +17,7 @@ package org.teavm.backend.javascript.rendering;
 
 import com.carrotsearch.hppc.ObjectIntHashMap;
 import com.carrotsearch.hppc.ObjectIntMap;
+import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -27,77 +28,84 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
 import java.util.function.IntFunction;
-import org.teavm.backend.javascript.codegen.NamingOrderer;
+import org.teavm.ast.AsyncMethodNode;
-import org.teavm.backend.javascript.codegen.NamingStrategy;
+import org.teavm.ast.ControlFlowEntry;
-import org.teavm.backend.javascript.codegen.OutputSourceWriter;
+import org.teavm.ast.MethodNode;
-import org.teavm.backend.javascript.codegen.RememberedSource;
+import org.teavm.ast.RegularMethodNode;
-import org.teavm.backend.javascript.codegen.ScopedName;
+import org.teavm.ast.analysis.LocationGraphBuilder;
+import org.teavm.ast.decompilation.DecompilationException;
+import org.teavm.ast.decompilation.Decompiler;
 import org.teavm.backend.javascript.codegen.SourceWriter;
-import org.teavm.backend.javascript.decompile.PreparedClass;
+import org.teavm.backend.javascript.spi.GeneratedBy;
-import org.teavm.backend.javascript.decompile.PreparedMethod;
+import org.teavm.backend.javascript.spi.Generator;
+import org.teavm.backend.javascript.spi.InjectedBy;
+import org.teavm.backend.javascript.templating.JavaScriptTemplateFactory;
+import org.teavm.cache.AstCacheEntry;
+import org.teavm.cache.AstDependencyExtractor;
+import org.teavm.cache.CacheStatus;
+import org.teavm.cache.MethodNodeCache;
 import org.teavm.common.ServiceRepository;
-import org.teavm.debugging.information.DebugInformationEmitter;
+import org.teavm.dependency.DependencyInfo;
-import org.teavm.debugging.information.DummyDebugInformationEmitter;
+import org.teavm.diagnostics.Diagnostics;
 import org.teavm.model.AccessLevel;
+import org.teavm.model.AnnotationHolder;
+import org.teavm.model.ClassHolder;
+import org.teavm.model.ClassHolderSource;
 import org.teavm.model.ClassReader;
+import org.teavm.model.ClassReaderSource;
 import org.teavm.model.ElementModifier;
 import org.teavm.model.FieldHolder;
 import org.teavm.model.FieldReference;
+import org.teavm.model.ListableClassHolderSource;
 import org.teavm.model.ListableClassReaderSource;
 import org.teavm.model.MethodDescriptor;
+import org.teavm.model.MethodHolder;
 import org.teavm.model.MethodReader;
 import org.teavm.model.MethodReference;
 import org.teavm.model.ValueType;
 import org.teavm.model.analysis.ClassMetadataRequirements;
+import org.teavm.model.util.AsyncMethodFinder;
 import org.teavm.vm.RenderingException;
 import org.teavm.vm.TeaVMProgressFeedback;
 
 public class Renderer implements RenderingManager {
-    private final NamingStrategy naming;
+    public static final int SECTION_STRING_POOL = 0;
-    private final OutputSourceWriter writer;
+    public static final int SECTION_METADATA = 1;
+
+    private final SourceWriter writer;
     private final ListableClassReaderSource classSource;
     private final ClassLoader classLoader;
-    private boolean minifying;
     private final Properties properties = new Properties();
     private final ServiceRepository services;
-    private DebugInformationEmitter debugEmitter = new DummyDebugInformationEmitter();
     private final Set<MethodReference> asyncMethods;
-    private final Set<MethodReference> asyncFamilyMethods;
     private RenderingContext context;
     private List<PostponedFieldInitializer> postponedFieldInitializers = new ArrayList<>();
     private IntFunction<TeaVMProgressFeedback> progressConsumer = p -> TeaVMProgressFeedback.CONTINUE;
+    private MethodBodyRenderer methodBodyRenderer;
+    private Map<String, Generator> generatorCache = new HashMap<>();
+    private Map<MethodReference, Generator> generators;
+    private MethodNodeCache astCache;
+    private CacheStatus cacheStatus;
+    private JavaScriptTemplateFactory templateFactory;
+    private boolean threadLibraryUsed;
+    private AstDependencyExtractor dependencyExtractor = new AstDependencyExtractor();
     public static final MethodDescriptor CLINIT_METHOD = new MethodDescriptor("<clinit>", ValueType.VOID);
 
-    private ObjectIntMap<String> sizeByClass = new ObjectIntHashMap<>();
+    public Renderer(SourceWriter writer, Set<MethodReference> asyncMethods, RenderingContext context,
-    private int stringPoolSize;
+            Diagnostics diagnostics, Map<MethodReference, Generator> generators,
-    private int metadataSize;
+            MethodNodeCache astCache, CacheStatus cacheStatus, JavaScriptTemplateFactory templateFactory) {
-
-    public Renderer(OutputSourceWriter writer, Set<MethodReference> asyncMethods,
-            Set<MethodReference> asyncFamilyMethods, RenderingContext context) {
-        this.naming = context.getNaming();
         this.writer = writer;
         this.classSource = context.getClassSource();
         this.classLoader = context.getClassLoader();
         this.services = context.getServices();
         this.asyncMethods = new HashSet<>(asyncMethods);
-        this.asyncFamilyMethods = new HashSet<>(asyncFamilyMethods);
         this.context = context;
-    }
+        methodBodyRenderer = new MethodBodyRenderer(context, diagnostics, context.isMinifying(), asyncMethods,
-
+                writer);
-    public int getStringPoolSize() {
+        this.generators = generators;
-        return stringPoolSize;
+        this.astCache = astCache;
-    }
+        this.cacheStatus = cacheStatus;
-
+        this.templateFactory = templateFactory;
-    public int getMetadataSize() {
-        return metadataSize;
-    }
-
-    public String[] getClassesInStats() {
-        return sizeByClass.keys().toArray(String.class);
-    }
-
-    public int getClassSize(String className) {
-        return sizeByClass.getOrDefault(className, 0);
     }
 
     @Override
@@ -105,18 +113,8 @@ public class Renderer implements RenderingManager {
         return writer;
     }
 
-    @Override
+    public boolean isThreadLibraryUsed() {
-    public NamingStrategy getNaming() {
+        return threadLibraryUsed;
-        return naming;
-    }
-
-    @Override
-    public boolean isMinifying() {
-        return minifying;
-    }
-
-    public void setMinifying(boolean minifying) {
-        this.minifying = minifying;
     }
 
     @Override
@@ -136,10 +134,6 @@ public class Renderer implements RenderingManager {
         return properties;
     }
 
-    public void setDebugEmitter(DebugInformationEmitter debugEmitter) {
-        this.debugEmitter = debugEmitter;
-    }
-
     public void setProgressConsumer(IntFunction<TeaVMProgressFeedback> progressConsumer) {
         this.progressConsumer = progressConsumer;
     }
@@ -153,7 +147,7 @@ public class Renderer implements RenderingManager {
         if (context.getStringPool().isEmpty()) {
             return;
         }
-        int start = writer.getOffset();
+        writer.markSectionStart(SECTION_STRING_POOL);
         writer.appendFunction("$rt_stringPool").append("([");
         for (int i = 0; i < context.getStringPool().size(); ++i) {
             if (i > 0) {
@@ -162,17 +156,16 @@ public class Renderer implements RenderingManager {
             RenderingUtil.writeString(writer, context.getStringPool().get(i));
         }
         writer.append("]);").newLine();
-        stringPoolSize = writer.getOffset() - start;
+        writer.markSectionEnd();
     }
 
     public void renderStringConstants() throws RenderingException {
         for (PostponedFieldInitializer initializer : postponedFieldInitializers) {
-            int start = writer.getOffset();
+            writer.markSectionStart(SECTION_STRING_POOL);
             writer.appendStaticField(initializer.field).ws().append("=").ws();
             context.constantToString(writer, initializer.value);
             writer.append(";").softNewLine();
-            int sz = writer.getOffset() - start;
+            writer.markSectionEnd();
-            appendClassSize(initializer.field.getClassName(), sz);
         }
     }
 
@@ -207,44 +200,58 @@ public class Renderer implements RenderingManager {
         writer.outdent().append("};").newLine();
     }
 
-    private void appendClassSize(String className, int sz) {
+    public boolean render(ListableClassHolderSource classes, boolean isFriendlyToDebugger) {
-        sizeByClass.put(className, sizeByClass.getOrDefault(className, 0) + sz);
+        var sequence = new ArrayList<ClassHolder>();
-    }
+        var visited = new HashSet<String>();
-
+        for (String className : classes.getClassNames()) {
-    public void prepare(List<PreparedClass> classes) {
+            orderClasses(classes, className, visited, sequence);
-        if (minifying) {
-            NamingOrderer orderer = new NamingOrderer();
-            NameFrequencyEstimator estimator = new NameFrequencyEstimator(orderer, classSource,
-                    asyncFamilyMethods);
-            for (PreparedClass cls : classes) {
-                estimator.estimate(cls);
-            }
-            naming.getScopeName();
-            orderer.apply(naming);
         }
-    }
 
-    public boolean render(List<PreparedClass> classes) throws RenderingException {
+        var asyncFinder = new AsyncMethodFinder(context.getDependencyInfo().getCallGraph(),
+                context.getDependencyInfo());
+        asyncFinder.find(classes);
+        asyncMethods.addAll(asyncFinder.getAsyncMethods());
+        var splitMethods = new HashSet<>(asyncMethods);
+        splitMethods.addAll(asyncFinder.getAsyncFamilyMethods());
+
+        var decompiler = new Decompiler(classes, splitMethods, isFriendlyToDebugger);
+
         int index = 0;
-        for (PreparedClass cls : classes) {
+        for (var cls : sequence) {
-            int start = writer.getOffset();
+            writer.markClassStart(cls.getName());
             renderDeclaration(cls);
-            renderMethodBodies(cls);
+            renderMethodBodies(cls, decompiler);
-            appendClassSize(cls.getName(), writer.getOffset() - start);
+            writer.markClassEnd();
-            if (progressConsumer.apply(1000 * ++index / classes.size()) == TeaVMProgressFeedback.CANCEL) {
+            if (progressConsumer.apply(1000 * ++index / sequence.size()) == TeaVMProgressFeedback.CANCEL) {
                 return false;
             }
         }
-        renderClassMetadata(classes);
+        renderClassMetadata(sequence);
         return true;
     }
 
-    private void renderDeclaration(PreparedClass cls) throws RenderingException {
+    private void orderClasses(ClassHolderSource classes, String className, Set<String> visited,
-        ScopedName jsName = naming.getNameFor(cls.getName());
+            List<ClassHolder> order) {
-        debugEmitter.addClass(jsName.value, cls.getName(), cls.getParentName());
+        if (!visited.add(className)) {
+            return;
+        }
+        ClassHolder cls = classes.get(className);
+        if (cls == null) {
+            return;
+        }
+        if (cls.getParent() != null) {
+            orderClasses(classes, cls.getParent(), visited, order);
+        }
+        for (String iface : cls.getInterfaces()) {
+            orderClasses(classes, iface, visited, order);
+        }
+        order.add(cls);
+    }
+
+    private void renderDeclaration(ClassHolder cls) throws RenderingException {
         List<FieldHolder> nonStaticFields = new ArrayList<>();
         List<FieldHolder> staticFields = new ArrayList<>();
-        for (FieldHolder field : cls.getClassHolder().getFields()) {
+        for (FieldHolder field : cls.getFields()) {
             if (field.getModifiers().contains(ElementModifier.STATIC)) {
                 staticFields.add(field);
             } else {
@@ -252,12 +259,13 @@ public class Renderer implements RenderingManager {
             }
         }
 
-        if (nonStaticFields.isEmpty() && !cls.getClassHolder().getName().equals("java.lang.Object")) {
+        if (nonStaticFields.isEmpty() && !cls.getName().equals("java.lang.Object")) {
-            renderShortClassFunctionDeclaration(cls, jsName);
+            renderShortClassFunctionDeclaration(cls);
         } else {
-            renderFullClassFunctionDeclaration(cls, jsName, nonStaticFields);
+            renderFullClassFunctionDeclaration(cls, nonStaticFields);
         }
 
+        var hasLet = false;
         for (FieldHolder field : staticFields) {
             Object value = field.getInitialValue();
             if (value == null) {
@@ -270,30 +278,30 @@ public class Renderer implements RenderingManager {
                 value = null;
             }
 
-            ScopedName fieldName = naming.getFullNameFor(fieldRef);
+            if (!hasLet) {
-            if (fieldName.scoped) {
-                writer.append(naming.getScopeName()).append(".");
-            } else {
                 writer.append("let ");
+                hasLet = true;
+            } else {
+                writer.append(",").ws();
             }
-            writer.append(fieldName.value).ws().append("=").ws();
+            writer.appendStaticField(fieldRef).ws().append("=").ws();
             context.constantToString(writer, value);
-            writer.append(";").softNewLine();
+        }
+        if (hasLet) {
+            writer.append(";").newLine();
         }
     }
 
-    private void renderFullClassFunctionDeclaration(PreparedClass cls, ScopedName jsName,
+    private void renderFullClassFunctionDeclaration(ClassReader cls, List<FieldHolder> nonStaticFields) {
-            List<FieldHolder> nonStaticFields) {
         boolean thisAliased = false;
-        renderFunctionDeclaration(jsName);
+        writer.append("function ").appendClass(cls.getName()).append("()").ws().append("{").indent().softNewLine();
-        writer.append("()").ws().append("{").indent().softNewLine();
         if (nonStaticFields.size() > 1) {
             thisAliased = true;
             writer.append("let a").ws().append("=").ws().append("this;").ws();
         }
-        if (!cls.getClassHolder().getModifiers().contains(ElementModifier.INTERFACE)
+        if (!cls.readModifiers().contains(ElementModifier.INTERFACE)
-                && cls.getParentName() != null) {
+                && cls.getParent() != null) {
-            writer.appendClass(cls.getParentName()).append(".call(").append(thisAliased ? "a" : "this")
+            writer.appendClass(cls.getParent()).append(".call(").append(thisAliased ? "a" : "this")
                     .append(");").softNewLine();
         }
         for (FieldHolder field : nonStaticFields) {
@@ -306,7 +314,6 @@ public class Renderer implements RenderingManager {
                     .append("=").ws();
             context.constantToString(writer, value);
             writer.append(";").softNewLine();
-            debugEmitter.addField(field.getName(), naming.getNameFor(fieldRef));
         }
 
         if (cls.getName().equals("java.lang.Object")) {
@@ -314,65 +321,83 @@ public class Renderer implements RenderingManager {
         }
 
         writer.outdent().append("}");
-        if (jsName.scoped) {
-            writer.append(";");
-        }
         writer.newLine();
     }
 
-    private void renderShortClassFunctionDeclaration(PreparedClass cls, ScopedName jsName) {
+    private void renderShortClassFunctionDeclaration(ClassReader cls) {
-        if (jsName.scoped) {
+        writer.append("let ").appendClass(cls.getName()).ws().append("=").ws()
-            writer.append(naming.getScopeName()).append(".");
+                .appendFunction("$rt_classWithoutFields").append("(");
-        } else {
+        if (cls.hasModifier(ElementModifier.INTERFACE)) {
-            writer.append("let ");
-        }
-        writer.append(jsName.value).ws().append("=").ws().appendFunction("$rt_classWithoutFields").append("(");
-        if (cls.getClassHolder().hasModifier(ElementModifier.INTERFACE)) {
             writer.append("0");
-        } else if (!cls.getParentName().equals("java.lang.Object")) {
+        } else if (!cls.getParent().equals("java.lang.Object")) {
-            writer.appendClass(cls.getParentName());
+            writer.appendClass(cls.getParent());
         }
         writer.append(");").newLine();
     }
 
-    private void renderMethodBodies(PreparedClass cls) throws RenderingException {
+    private void renderMethodBodies(ClassHolder cls, Decompiler decompiler) {
-        debugEmitter.emitClass(cls.getName());
+        writer.emitClass(cls.getName());
 
         MethodReader clinit = classSource.get(cls.getName()).getMethod(CLINIT_METHOD);
 
         if (clinit != null && context.isDynamicInitializer(cls.getName())) {
             renderCallClinit(clinit, cls);
         }
-        if (!cls.getClassHolder().hasModifier(ElementModifier.INTERFACE)
+        if (!cls.hasModifier(ElementModifier.INTERFACE)
-                && !cls.getClassHolder().hasModifier(ElementModifier.ABSTRACT)) {
+                && !cls.hasModifier(ElementModifier.ABSTRACT)) {
-            for (PreparedMethod method : cls.getMethods()) {
+            for (var method : cls.getMethods()) {
-                if (!method.modifiers.contains(ElementModifier.STATIC)) {
+                if (!method.hasModifier(ElementModifier.STATIC)) {
-                    if (method.reference.getName().equals("<init>")) {
+                    if (method.getName().equals("<init>")) {
                         renderInitializer(method);
                     }
                 }
             }
         }
 
-        for (PreparedMethod method : cls.getMethods()) {
+        var hasLet = false;
-            renderBody(method);
+        for (var method : cls.getMethods()) {
+            if (!filterMethod(method)) {
+                continue;
+            }
+            if (!hasLet) {
+                writer.append("let ");
+                hasLet = true;
+            } else {
+                writer.append(",").newLine();
+            }
+            renderBody(method, decompiler);
+        }
+        if (hasLet) {
+            writer.append(";").newLine();
         }
 
-        debugEmitter.emitClass(null);
+        writer.emitClass(null);
     }
 
-    private void renderCallClinit(MethodReader clinit, PreparedClass cls) {
+    private boolean filterMethod(MethodReader method) {
+        if (method.hasModifier(ElementModifier.ABSTRACT)) {
+            return false;
+        }
+        if (method.getAnnotations().get(InjectedBy.class.getName()) != null
+                || context.getInjector(method.getReference()) != null) {
+            return false;
+        }
+        if (!method.hasModifier(ElementModifier.NATIVE) && method.getProgram() == null) {
+            return false;
+        }
+        return true;
+    }
+
+    private void renderCallClinit(MethodReader clinit, ClassReader cls) {
         boolean isAsync = asyncMethods.contains(clinit.getReference());
 
-        ScopedName className = naming.getNameFor(cls.getName());
+        var clinitCalledField = new FieldReference(cls.getName(), "$_teavm_clinitCalled_$");
-        String clinitCalled = (className.scoped ? naming.getScopeName() + "_" : "") + className.value
-                + "_$clinitCalled";
         if (isAsync) {
-            writer.append("let ").append(clinitCalled).ws().append("=").ws().append("false;").softNewLine();
+            writer.append("let ").appendStaticField(clinitCalledField).ws().append("=").ws().append("false;")
+                    .softNewLine();
         }
 
-        ScopedName name = naming.getNameForClassInit(cls.getName());
+        writer.append("let ").appendClassInit(cls.getName()).ws().append("=").ws();
-        renderLambdaDeclaration(name);
         writer.append("()").sameLineWs().append("=>").ws().append("{").softNewLine().indent();
 
         if (isAsync) {
@@ -383,7 +408,7 @@ public class Renderer implements RenderingManager {
             writer.append(context.pointerName()).ws().append("=").ws().appendFunction("$rt_nativeThread")
                     .append("().pop();").softNewLine();
             writer.outdent().append("}").ws();
-            writer.append("else if").ws().append("(").append(clinitCalled).append(")").ws()
+            writer.append("else if").ws().append("(").appendStaticField(clinitCalledField).append(")").ws()
                     .append("{").indent().softNewLine();
             writer.append("return;").softNewLine();
             writer.outdent().append("}").softNewLine();
@@ -391,7 +416,7 @@ public class Renderer implements RenderingManager {
             renderAsyncPrologue(writer, context);
 
             writer.append("case 0:").indent().softNewLine();
-            writer.append(clinitCalled).ws().append('=').ws().append("true;").softNewLine();
+            writer.appendStaticField(clinitCalledField).ws().append('=').ws().append("true;").softNewLine();
         } else {
             renderEraseClinit(cls);
         }
@@ -416,55 +441,48 @@ public class Renderer implements RenderingManager {
             writer.appendFunction("$rt_nativeThread").append("().push(" + context.pointerName() + ");").softNewLine();
         }
 
-        writer.outdent().append("}");
+        writer.outdent().append("};");
-        if (name.scoped) {
-            writer.append(";");
-        }
         writer.newLine();
     }
 
-    private void renderEraseClinit(PreparedClass cls) {
+    private void renderEraseClinit(ClassReader cls) {
         writer.appendClassInit(cls.getName()).ws().append("=").ws()
                 .appendFunction("$rt_eraseClinit").append("(")
                 .appendClass(cls.getName()).append(");").softNewLine();
     }
 
-    private void renderClassMetadata(List<PreparedClass> classes) {
+    private void renderClassMetadata(List<? extends ClassReader> classReaders) {
-        if (classes.isEmpty()) {
-            return;
-        }
-
         ClassMetadataRequirements metadataRequirements = new ClassMetadataRequirements(context.getDependencyInfo());
 
-        int start = writer.getOffset();
+        writer.markSectionStart(SECTION_METADATA);
 
         writer.appendFunction("$rt_packages").append("([");
-        ObjectIntMap<String> packageIndexes = generatePackageMetadata(classes, metadataRequirements);
+        ObjectIntMap<String> packageIndexes = generatePackageMetadata(classReaders, metadataRequirements);
         writer.append("]);").newLine();
 
-        for (int i = 0; i < classes.size(); i += 50) {
+        for (int i = 0; i < classReaders.size(); i += 50) {
-            int j = Math.min(i + 50, classes.size());
+            int j = Math.min(i + 50, classReaders.size());
-            renderClassMetadataPortion(classes.subList(i, j), packageIndexes, metadataRequirements);
+            renderClassMetadataPortion(classReaders.subList(i, j), packageIndexes, metadataRequirements);
         }
 
-        metadataSize = writer.getOffset() - start;
+        writer.markSectionEnd();
     }
 
-    private void renderClassMetadataPortion(List<PreparedClass> classes, ObjectIntMap<String> packageIndexes,
+    private void renderClassMetadataPortion(List<? extends ClassReader> classes, ObjectIntMap<String> packageIndexes,
             ClassMetadataRequirements metadataRequirements) {
         writer.appendFunction("$rt_metadata").append("([");
         boolean first = true;
-        for (PreparedClass cls : classes) {
+        for (var cls : classes) {
             if (!first) {
                 writer.append(',').softNewLine();
             }
             first = false;
-            debugEmitter.emitClass(cls.getName());
+            writer.emitClass(cls.getName());
             writer.appendClass(cls.getName()).append(",").ws();
 
-            ClassMetadataRequirements.Info requiredMetadata = metadataRequirements.getInfo(cls.getName());
+            var className = cls.getName();
+            var requiredMetadata = metadataRequirements.getInfo(className);
             if (requiredMetadata.name()) {
-                String className = cls.getName();
                 int dotIndex = className.lastIndexOf('.') + 1;
                 String packageName = className.substring(0, dotIndex);
                 className = className.substring(dotIndex);
@@ -475,14 +493,14 @@ public class Renderer implements RenderingManager {
             }
             writer.append(",").ws();
 
-            if (cls.getParentName() != null) {
+            if (cls.getParent() != null) {
-                writer.appendClass(cls.getParentName());
+                writer.appendClass(cls.getParent());
             } else {
                 writer.append("0");
             }
             writer.append(',').ws();
             writer.append("[");
-            List<String> interfaces = new ArrayList<>(cls.getClassHolder().getInterfaces());
+            var interfaces = new ArrayList<>(cls.getInterfaces());
             for (int i = 0; i < interfaces.size(); ++i) {
                 String iface = interfaces.get(i);
                 if (i > 0) {
@@ -492,28 +510,28 @@ public class Renderer implements RenderingManager {
             }
             writer.append("],").ws();
 
-            writer.append(ElementModifier.pack(cls.getClassHolder().getModifiers())).append(',').ws();
+            writer.append(ElementModifier.pack(cls.readModifiers())).append(',').ws();
-            writer.append(cls.getClassHolder().getLevel().ordinal()).append(',').ws();
+            writer.append(cls.getLevel().ordinal()).append(',').ws();
 
             if (!requiredMetadata.enclosingClass() && !requiredMetadata.declaringClass()
                     && !requiredMetadata.simpleName()) {
                 writer.append("0");
             } else {
                 writer.append('[');
-                if (requiredMetadata.enclosingClass() && cls.getClassHolder().getOwnerName() != null) {
+                if (requiredMetadata.enclosingClass() && cls.getOwnerName() != null) {
-                    writer.appendClass(cls.getClassHolder().getOwnerName());
+                    writer.appendClass(cls.getOwnerName());
                 } else {
                     writer.append('0');
                 }
                 writer.append(',');
-                if (requiredMetadata.declaringClass() && cls.getClassHolder().getDeclaringClassName() != null) {
+                if (requiredMetadata.declaringClass() && cls.getDeclaringClassName() != null) {
-                    writer.appendClass(cls.getClassHolder().getDeclaringClassName());
+                    writer.appendClass(cls.getDeclaringClassName());
                 } else {
                     writer.append('0');
                 }
                 writer.append(',');
-                if (requiredMetadata.simpleName() && cls.getClassHolder().getSimpleName() != null) {
+                if (requiredMetadata.simpleName() && cls.getSimpleName() != null) {
-                    writer.append("\"").append(RenderingUtil.escapeString(cls.getClassHolder().getSimpleName()))
+                    writer.append("\"").append(RenderingUtil.escapeString(cls.getSimpleName()))
                             .append("\"");
                 } else {
                     writer.append('0');
@@ -532,30 +550,30 @@ public class Renderer implements RenderingManager {
 
             Map<MethodDescriptor, MethodReference> virtualMethods = new LinkedHashMap<>();
             collectMethodsToCopyFromInterfaces(classSource.get(cls.getName()), virtualMethods);
-            for (PreparedMethod method : cls.getMethods()) {
+            for (var method : cls.getMethods()) {
-                if (!method.modifiers.contains(ElementModifier.STATIC)
+                if (filterMethod(method) && !method.readModifiers().contains(ElementModifier.STATIC)
-                        && method.accessLevel != AccessLevel.PRIVATE) {
+                        && method.getLevel() != AccessLevel.PRIVATE) {
-                    virtualMethods.put(method.reference.getDescriptor(), method.reference);
+                    virtualMethods.put(method.getDescriptor(), method.getReference());
                 }
             }
 
             renderVirtualDeclarations(virtualMethods.values());
-            debugEmitter.emitClass(null);
+            writer.emitClass(null);
         }
         writer.append("]);").newLine();
     }
 
-    private ObjectIntMap<String> generatePackageMetadata(List<PreparedClass> classes,
+    private ObjectIntMap<String> generatePackageMetadata(List<? extends ClassReader> classes,
             ClassMetadataRequirements metadataRequirements) {
         PackageNode root = new PackageNode(null);
 
-        for (PreparedClass classNode : classes) {
+        for (var cls : classes) {
-            String className = classNode.getName();
+            var requiredMetadata = metadataRequirements.getInfo(cls.getName());
-            ClassMetadataRequirements.Info requiredMetadata = metadataRequirements.getInfo(className);
             if (!requiredMetadata.name()) {
                 continue;
             }
 
+            var className = cls.getName();
             int dotIndex = className.lastIndexOf('.');
             if (dotIndex < 0) {
                 continue;
@@ -593,14 +611,6 @@ public class Renderer implements RenderingManager {
         PackageNode(String name) {
             this.name = name;
         }
-
-        int count() {
-            int result = 0;
-            for (PackageNode child : children.values()) {
-                result += 1 + child.count();
-            }
-            return result;
-        }
     }
 
     private void addPackageName(PackageNode node, String name) {
@@ -686,11 +696,10 @@ public class Renderer implements RenderingManager {
         return null;
     }
 
-    private void renderInitializer(PreparedMethod method) {
+    private void renderInitializer(MethodReader method) {
-        MethodReference ref = method.reference;
+        MethodReference ref = method.getReference();
-        debugEmitter.emitMethod(ref.getDescriptor());
+        writer.emitMethod(ref.getDescriptor());
-        ScopedName name = naming.getNameForInit(ref);
+        writer.append("let ").appendInit(ref).ws().append("=").ws();
-        renderLambdaDeclaration(name);
         if (ref.parameterCount() != 1) {
             writer.append("(");
         }
@@ -715,16 +724,13 @@ public class Renderer implements RenderingManager {
         }
         writer.append(");").softNewLine();
         writer.append("return " + instanceName + ";").softNewLine();
-        writer.outdent().append("}");
+        writer.outdent().append("};");
-        if (name.scoped) {
-            writer.append(";");
-        }
         writer.newLine();
-        debugEmitter.emitMethod(null);
+        writer.emitMethod(null);
     }
 
     private String variableNameForInitializer(int index) {
-        return minifying ? RenderingUtil.indexToId(index) : "var_" + index;
+        return context.isMinifying() ? RenderingUtil.indexToId(index) : "var_" + index;
     }
 
     private void renderVirtualDeclarations(Collection<MethodReference> methods) {
@@ -739,19 +745,19 @@ public class Renderer implements RenderingManager {
             if (!isVirtual(method)) {
                 continue;
             }
-            debugEmitter.emitMethod(method.getDescriptor());
+            writer.emitMethod(method.getDescriptor());
             if (!first) {
                 writer.append(",").ws();
             }
             first = false;
             emitVirtualDeclaration(method);
-            debugEmitter.emitMethod(null);
+            writer.emitMethod(null);
         }
         writer.append("]");
     }
 
     private void emitVirtualDeclaration(MethodReference ref) {
-        String methodName = naming.getNameFor(ref.getDescriptor());
+        String methodName = context.getNaming().getNameFor(ref.getDescriptor());
         writer.append("\"").append(methodName).append("\"");
         writer.append(",").ws();
         emitVirtualFunctionWrapper(ref);
@@ -787,47 +793,142 @@ public class Renderer implements RenderingManager {
         writer.append(");").ws().append("}");
     }
 
-    private void renderBody(PreparedMethod method) {
+    private void renderBody(MethodHolder method, Decompiler decompiler) {
-        MethodReference ref = method.reference;
+        MethodReference ref = method.getReference();
-        debugEmitter.emitMethod(ref.getDescriptor());
+        writer.emitMethod(ref.getDescriptor());
-        ScopedName name = naming.getFullNameFor(ref);
 
-        renderLambdaDeclaration(name);
+        writer.appendMethodBody(ref).ws().append("=").ws();
-        method.parameters.replay(writer, RememberedSource.FILTER_ALL);
+        methodBodyRenderer.renderParameters(ref, method.getModifiers());
-        if (method.variables != null) {
-            for (var variable : method.variables) {
-                variable.emit(debugEmitter);
-            }
-        }
         writer.sameLineWs().append("=>").ws().append("{").indent().softNewLine();
-        method.body.replay(writer, RememberedSource.FILTER_ALL);
+        if (method.hasModifier(ElementModifier.NATIVE)) {
+            renderNativeBody(method, classSource);
+        } else {
+            renderRegularBody(method, decompiler);
+        }
 
         writer.outdent().append("}");
-        if (name.scoped) {
+        writer.emitMethod(null);
-            writer.append(";");
-        }
-
-        writer.newLine();
-        debugEmitter.emitMethod(null);
     }
 
-    private void renderLambdaDeclaration(ScopedName name) {
+    private void renderNativeBody(MethodHolder method, ClassReaderSource classes) {
-        if (name.scoped) {
+        var reference = method.getReference();
-            writer.append(naming.getScopeName()).append(".").append(name.value);
+        var generator = generators.get(reference);
+        if (generator == null) {
+            AnnotationHolder annotHolder = method.getAnnotations().get(GeneratedBy.class.getName());
+            if (annotHolder == null) {
+                throw new DecompilationException("Method " + method.getOwnerName() + "." + method.getDescriptor()
+                        + " is native, but no " + GeneratedBy.class.getName() + " annotation found");
+            }
+            ValueType annotValue = annotHolder.getValues().get("value").getJavaClass();
+            String generatorClassName = ((ValueType.Object) annotValue).getClassName();
+            generator = generatorCache.computeIfAbsent(generatorClassName,
+                    name -> createGenerator(name, method, classes));
+        }
+
+        var async = asyncMethods.contains(reference);
+        methodBodyRenderer.renderNative(generator, async, reference);
+        threadLibraryUsed |= methodBodyRenderer.isThreadLibraryUsed();
+    }
+
+    private Generator createGenerator(String name, MethodHolder method, ClassReaderSource classes) {
+        Class<?> generatorClass;
+        try {
+            generatorClass = Class.forName(name, true, context.getClassLoader());
+        } catch (ClassNotFoundException e) {
+            throw new DecompilationException("Error instantiating generator " + name
+                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor());
+        }
+
+        var constructors = generatorClass.getConstructors();
+        if (constructors.length != 1) {
+            throw new DecompilationException("Error instantiating generator " + name
+                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor());
+        }
+
+        var constructor = constructors[0];
+        var parameterTypes = constructor.getParameterTypes();
+        var arguments = new Object[parameterTypes.length];
+        for (var i = 0; i < arguments.length; ++i) {
+            var parameterType = parameterTypes[i];
+            if (parameterType.equals(ClassReaderSource.class)) {
+                arguments[i] = classes;
+            } else if (parameterType.equals(Properties.class)) {
+                arguments[i] = context.getProperties();
+            } else if (parameterType.equals(DependencyInfo.class)) {
+                arguments[i] = context.getDependencyInfo();
+            } else if (parameterType.equals(ServiceRepository.class)) {
+                arguments[i] = context.getServices();
+            } else if (parameterType.equals(JavaScriptTemplateFactory.class)) {
+                arguments[i] = templateFactory;
+            } else {
+                var service = context.getServices().getService(parameterType);
+                if (service == null) {
+                    throw new DecompilationException("Error instantiating generator " + name
+                            + " for native method " + method.getOwnerName() + "." + method.getDescriptor() + ". "
+                            + "Its constructor requires " + parameterType + " as its parameter #" + (i + 1)
+                            + " which is not available.");
+                }
+            }
+        }
+
+        try {
+            return (Generator) constructor.newInstance(arguments);
+        } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+            throw new DecompilationException("Error instantiating generator " + name
+                    + " for native method " + method.getOwnerName() + "." + method.getDescriptor(), e);
+        }
+    }
+
+    private void renderRegularBody(MethodHolder method, Decompiler decompiler) {
+        MethodReference reference = method.getReference();
+        MethodNode node;
+        var async = asyncMethods.contains(reference);
+        if (async) {
+            node = decompileAsync(decompiler, method);
         } else {
-            writer.append("let ").append(name.value);
+            var entry = decompileRegular(decompiler, method);
+            node = entry.method;
         }
-        writer.ws().append("=").ws();
+        methodBodyRenderer.render(node, async);
+        threadLibraryUsed |= methodBodyRenderer.isThreadLibraryUsed();
     }
 
-    private void renderFunctionDeclaration(ScopedName name) {
+    private AstCacheEntry decompileRegular(Decompiler decompiler, MethodHolder method) {
-        if (name.scoped) {
+        if (astCache == null) {
-            writer.append(naming.getScopeName()).append(".").append(name.value).ws().append("=").ws();
+            return decompileRegularCacheMiss(decompiler, method);
         }
-        writer.append("function");
+
-        if (!name.scoped) {
+        AstCacheEntry entry = !cacheStatus.isStaleMethod(method.getReference())
-            writer.append(" ").append(name.value);
+                ? astCache.get(method.getReference(), cacheStatus)
+                : null;
+        if (entry == null) {
+            entry = decompileRegularCacheMiss(decompiler, method);
+            RegularMethodNode finalNode = entry.method;
+            astCache.store(method.getReference(), entry, () -> dependencyExtractor.extract(finalNode));
         }
+        return entry;
+    }
+
+    private AstCacheEntry decompileRegularCacheMiss(Decompiler decompiler, MethodHolder method) {
+        RegularMethodNode node = decompiler.decompileRegular(method);
+        ControlFlowEntry[] cfg = LocationGraphBuilder.build(node.getBody());
+        return new AstCacheEntry(node, cfg);
+    }
+
+    private AsyncMethodNode decompileAsync(Decompiler decompiler, MethodHolder method) {
+        if (astCache == null) {
+            return decompiler.decompileAsync(method);
+        }
+
+        AsyncMethodNode node = !cacheStatus.isStaleMethod(method.getReference())
+                ? astCache.getAsync(method.getReference(), cacheStatus)
+                : null;
+        if (node == null) {
+            node = decompiler.decompileAsync(method);
+            AsyncMethodNode finalNode = node;
+            astCache.storeAsync(method.getReference(), node, () -> dependencyExtractor.extract(finalNode));
+        }
+        return node;
     }
 
     static void renderAsyncPrologue(SourceWriter writer, RenderingContext context) {

core/src/main/java/org/teavm/backend/javascript/rendering/RenderingManager.java

@@ -22,12 +22,8 @@ import org.teavm.common.ServiceRepository;
 import org.teavm.model.ListableClassReaderSource;
 
 public interface RenderingManager extends ServiceRepository {
-    NamingStrategy getNaming();
-
     SourceWriter getWriter();
 
-    boolean isMinifying();
-
     ListableClassReaderSource getClassSource();
 
     ClassLoader getClassLoader();

tools/junit/src/main/resources/test-server/client.js

@@ -18,7 +18,9 @@
 
 let logging = false;
 let deobfuscation = false;
-deobfuscator();
+if (typeof deobfuscator !== 'undefined') {
+    deobfuscator();
+}
 
 function tryConnect() {
     let ws = new WebSocket("ws://localhost:{{PORT}}/ws");