Add NativeDataResolver

pkg/compiler/lib/src/world.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.world;
 
 import 'closure.dart' show ClosureClassElement, SynthesizedCallMethodElementX;
 import 'common/backend_api.dart' show BackendClasses;
 import 'common.dart';
 import 'constants/constant_system.dart';
 import 'common_elements.dart' show CommonElements;
 import 'elements/entities.dart';
 import 'elements/elements.dart'
     show
         ClassElement,
         Element,
         FunctionElement,
         MemberElement,
         MixinApplicationElement,
         TypedefElement,
         FieldElement;
 import 'elements/resolution_types.dart';
 import 'js_backend/backend.dart' show JavaScriptBackend;
 import 'js_backend/interceptor_data.dart' show InterceptorData;
-import 'js_backend/native_data.dart' show NativeClassData;
+import 'js_backend/native_data.dart' show NativeData;
 import 'ordered_typeset.dart';
 import 'types/masks.dart' show CommonMasks, FlatTypeMask, TypeMask;
 import 'universe/class_set.dart';
 import 'universe/function_set.dart' show FunctionSet, FunctionSetBuilder;
 import 'universe/selector.dart' show Selector;
 import 'universe/side_effects.dart' show SideEffects;
 import 'universe/world_builder.dart' show ResolutionWorldBuilder;
 import 'util/util.dart' show Link;
 
 /// Common superinterface for [OpenWorld] and [ClosedWorld].
 abstract class World {}
 
 /// The [ClosedWorld] represents the information known about a program when
 /// compiling with closed-world semantics.
 ///
 /// Given the entrypoint of an application, we can track what's reachable from
 /// it, what functions are called, what classes are allocated, which native
 /// JavaScript types are touched, what language features are used, and so on.
 /// This precise knowledge about what's live in the program is later used in
 /// optimizations and other compiler decisions during code generation.
 abstract class ClosedWorld implements World {
   /// Access to core classes used by the backend.
   BackendClasses get backendClasses;
 
+  NativeData get nativeData;
+
   InterceptorData get interceptorData;
 
   CommonElements get commonElements;
 
   CommonMasks get commonMasks;
 
   ConstantSystem get constantSystem;
 
   /// Returns `true` if [cls] is either directly or indirectly instantiated.
   bool isInstantiated(ClassEntity cls);
@@ skipping 379 matching lines @@
         this._resolverWorld = resolutionWorldBuilder,
         this._allTypedefs = allTypedefs,
         this._mixinUses = mixinUses,
         this._typesImplementedBySubclasses = typesImplementedBySubclasses,
         this._classHierarchyNodes = classHierarchyNodes,
         this._classSets = classSets {
     _commonMasks = new CommonMasks(this);
     _allFunctions = functionSetBuilder.close(this);
   }
 
-  NativeClassData get _nativeClassData => _backend.nativeClassData;
+  NativeData get nativeData => _backend.nativeData;
 
   @override
   ClosedWorld get closedWorld => this;
 
   /// Cache of [FlatTypeMask]s grouped by the 8 possible values of the
   /// `FlatTypeMask.flags` property.
   final List<Map<ClassElement, TypeMask>> _canonicalizedTypeMasks =
       new List<Map<ClassElement, TypeMask>>.filled(8, null);
 
   FunctionSet get allFunctions => _allFunctions;
@@ skipping 247 matching lines @@
     if (classSet == null) {
       // Vacuously true.
       return true;
     }
     return classSet.hasOnlyInstantiatedSubclasses;
   }
 
   @override
   ClassElement getLubOfInstantiatedSubclasses(ClassElement cls) {
     assert(isClosed);
-    if (_nativeClassData.isJsInteropClass(cls)) {
+    if (nativeData.isJsInteropClass(cls)) {
       return _backend.helpers.jsJavaScriptObjectClass;
     }
     ClassHierarchyNode hierarchy = _classHierarchyNodes[cls.declaration];
     return hierarchy != null
         ? hierarchy.getLubOfInstantiatedSubclasses()
         : null;
   }
 
   @override
   ClassElement getLubOfInstantiatedSubtypes(ClassElement cls) {
     assert(isClosed);
-    if (_nativeClassData.isJsInteropClass(cls)) {
+    if (nativeData.isJsInteropClass(cls)) {
       return _backend.helpers.jsJavaScriptObjectClass;
     }
     ClassSet classSet = _classSets[cls.declaration];
     return classSet != null ? classSet.getLubOfInstantiatedSubtypes() : null;
   }
 
   /// Returns an iterable over the common supertypes of the [classes].
   Iterable<ClassElement> commonSupertypesOf(Iterable<ClassElement> classes) {
     assert(isClosed);
     Iterator<ClassElement> iterator = classes.iterator;
@@ skipping 349 matching lines @@
   void addFunctionCalledInLoop(Element element) {
     functionsCalledInLoop.add(element.declaration);
   }
 
   bool isCalledInLoop(Element element) {
     return functionsCalledInLoop.contains(element.declaration);
   }
 
   bool fieldNeverChanges(MemberElement element) {
     if (!element.isField) return false;
-    if (_nativeClassData.isNativeMember(element)) {
+    if (nativeData.isNativeMember(element)) {
       // Some native fields are views of data that may be changed by operations.
       // E.g. node.firstChild depends on parentNode.removeBefore(n1, n2).
       // TODO(sra): Refine the effect classification so that native effects are
       // distinct from ordinary Dart effects.
       return false;
     }
 
     if (element.isFinal || element.isConst) {
       return true;
     }
@@ skipping 80 matching lines @@
       return getMightBePassedToApply(element.expression);
     }
     return functionsThatMightBePassedToApply.contains(element);
   }
 
   @override
   bool getCurrentlyKnownMightBePassedToApply(Element element) {
     return getMightBePassedToApply(element);
   }
 }