Eagerly compute closure classes

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'cache_strategy.dart' show CacheStrategy;
@@ skipping 706 matching lines @@
             // code is artificially used.
             // If compilation failed, it is possible that the error prevents the
             // compiler from analyzing all the code.
             // TODO(johnniwinther): Reenable this when the reporting is more
             // precise.
             //reportUnusedCode();
           }
           return;
         }
         assert(mainFunction != null);
-        phase = PHASE_DONE_RESOLVING;
 
-        openWorld.closeWorld();
-        // Compute whole-program-knowledge that the backend needs. (This might
-        // require the information computed in [world.populate].)
-        backend.onResolutionComplete();
-
-        deferredLoadTask.onResolutionComplete(mainFunction);
+        closeResolution();
 
         reporter.log('Inferring types...');
         globalInference.runGlobalTypeInference(mainFunction);
 
         if (stopAfterTypeInference) return;
 
         backend.onTypeInferenceComplete();
 
         reporter.log('Compiling...');
         phase = PHASE_COMPILING;
@@ skipping 15 matching lines @@
         if (options.dumpInfo) {
           dumpInfoTask.reportSize(programSize);
           dumpInfoTask.dumpInfo();
         }
 
         backend.sourceInformationStrategy.onComplete();
 
         checkQueues();
       });
 
+  /// Perform the steps needed to fully end the resolution phase.
+  void closeResolution() {
+    phase = PHASE_DONE_RESOLVING;
+
+    openWorld.closeWorld();
+    // Compute whole-program-knowledge that the backend needs. (This might
+    // require the information computed in [world.closeWorld].)
+    backend.onResolutionComplete();
+
+    deferredLoadTask.onResolutionComplete(mainFunction);
+
+    // TODO(johnniwinther): Move this after rti computation but before
+    // reflection members computation, and (re-)close the world afterwards.
+    closureToClassMapper.createClosureClasses();
+  }
+
   void fullyEnqueueLibrary(LibraryElement library, Enqueuer world) {
     void enqueueAll(Element element) {
       fullyEnqueueTopLevelElement(element, world);
     }
 
     library.implementation.forEachLocalMember(enqueueAll);
     library.imports.forEach((ImportElement import) {
       if (import.isDeferred) {
         // `import.prefix` and `loadLibrary` may be `null` when the deferred
         // import has compile-time errors.
@@ skipping 1466 matching lines @@
   _ElementScanner(this.scanner);
   void scanLibrary(LibraryElement library) => scanner.scanLibrary(library);
   void scanUnit(CompilationUnitElement unit) => scanner.scan(unit);
 }
 
 class _EmptyEnvironment implements Environment {
   const _EmptyEnvironment();
 
   String valueOf(String key) => null;
 }