Move towards using WorldImpact for codegen

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;
 import 'closure.dart' as closureMapping show ClosureTask;
 import 'common/backend_api.dart' show Backend;
 import 'common/codegen.dart' show CodegenWorkItem;
 import 'common/names.dart' show Selectors;
 import 'common/names.dart' show Identifiers, Uris;
-import 'common/registry.dart' show EagerRegistry, Registry;
+import 'common/registry.dart' show Registry;
 import 'common/resolution.dart'
     show
         ParsingContext,
         Resolution,
         ResolutionWorkItem,
         ResolutionImpact,
         Target;
 import 'common/tasks.dart' show CompilerTask, GenericTask, Measurer;
 import 'common/work.dart' show WorkItem;
 import 'common.dart';
@@ skipping 210 matching lines @@
     _coreTypes = new _CompilerCoreTypes(_resolution, reporter);
     types = new Types(_resolution);
     tracer = new Tracer(this, this.outputProvider);
 
     if (options.verbose) {
       progress = new Stopwatch()..start();
     }
 
     // TODO(johnniwinther): Separate the dependency tracking from the enqueuing
     // for global dependencies.
-    globalDependencies = new GlobalDependencyRegistry(this);
+    globalDependencies = new GlobalDependencyRegistry();
 
     if (makeBackend != null) {
       backend = makeBackend(this);
     } else {
       js_backend.JavaScriptBackend jsBackend = new js_backend.JavaScriptBackend(
           this,
           generateSourceMap: options.generateSourceMap,
           useStartupEmitter: options.useStartupEmitter,
           useNewSourceInfo: options.useNewSourceInfo,
           useKernel: options.useKernel);
@@ skipping 45 matching lines @@
   }
 
   /// The world currently being computed by resolution. This forms a basis for
   /// the [inferenceWorld] and later the [closedWorld].
   OpenWorld get openWorld => _world;
 
   /// The closed world after resolution but currently refined by inference.
   ClosedWorldRefiner get inferenceWorld => _world;
 
   /// The closed world after resolution and inference.
-  ClosedWorld get closedWorld => _world;
+  ClosedWorld get closedWorld {
+    assert(invariant(CURRENT_ELEMENT_SPANNABLE, _world.isClosed,
+        message: "Closed world not computed yet."));
+    return _world;
+  }
 
   /// Creates the scanner task.
   ///
   /// Override this to mock the scanner for testing.
   ScannerTask createScannerTask() =>
       new ScannerTask(dietParser, reporter, measurer,
           preserveComments: options.preserveComments, commentMap: commentMap);
 
   /// Creates the resolver task.
   ///
@@ skipping 390 matching lines @@
             // 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.populate();
+        openWorld.closeWorld();
         // Compute whole-program-knowledge that the backend needs. (This might
         // require the information computed in [world.populate].)
         backend.onResolutionComplete();
 
         deferredLoadTask.onResolutionComplete(mainFunction);
 
         reporter.log('Inferring types...');
         globalInference.runGlobalTypeInference(mainFunction);
 
         if (stopAfterTypeInference) return;
@@ skipping 1450 matching lines @@
     if (field == null) return false;
     if (!hasBeenResolved(field)) return false;
     if (_proxyConstant == null) {
       _proxyConstant = constants
           .getConstantValue(resolver.constantCompiler.compileConstant(field));
     }
     return _proxyConstant == value;
   }
 }
 
-class GlobalDependencyRegistry extends EagerRegistry {
-  final Compiler compiler;
+class GlobalDependencyRegistry extends Registry {
   Setlet<Element> _otherDependencies;
 
-  GlobalDependencyRegistry(this.compiler) : super('GlobalDependencies', null);
-
-  // TODO(johnniwinther): Rename world/universe/enqueuer through out the
-  // compiler.
-  @override
-  Enqueuer get world => compiler.enqueuer.codegen;
+  GlobalDependencyRegistry();
 
   void registerDependency(Element element) {
     if (element == null) return;
     if (_otherDependencies == null) {
       _otherDependencies = new Setlet<Element>();
     }
     _otherDependencies.add(element.implementation);
   }
 
   Iterable<Element> get otherDependencies {
     return _otherDependencies != null ? _otherDependencies : const <Element>[];
   }
+
+  String get name => 'GlobalDependencies';
 }
 
 class _ScriptLoader implements ScriptLoader {
   Compiler compiler;
   _ScriptLoader(this.compiler);
 
   Future<Script> readScript(Uri uri, [Spannable spannable]) =>
       compiler.readScript(uri, spannable);
 }
 
@@ skipping 14 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;
 }