Split RuntimesTypes into RuntimeTypes and RuntimeTypesEncoder

pkg/compiler/lib/src/js_backend/backend.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.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
@@ skipping 493 matching lines @@
       new Setlet<FunctionElement>();
 
   List<CompilerTask> get tasks {
     List<CompilerTask> result = functionCompiler.tasks;
     result.add(emitter);
     result.add(patchResolverTask);
     return result;
   }
 
   final RuntimeTypes rti;
+  final RuntimeTypesEncoder rtiEncoder;
 
   /// Holds the method "disableTreeShaking" in js_mirrors when
   /// dart:mirrors has been loaded.
   FunctionElement disableTreeShakingMarker;
 
   /// Holds the method "preserveNames" in js_mirrors when
   /// dart:mirrors has been loaded.
   FunctionElement preserveNamesMarker;
 
   /// Holds the method "preserveMetadata" in js_mirrors when
@@ skipping 107 matching lines @@
   bool enabledNoSuchMethod = false;
 
   final SourceInformationStrategy sourceInformationStrategy;
 
   JavaScriptBackend(Compiler compiler,
                     {bool generateSourceMap: true,
                      bool useStartupEmitter: false})
       : namer = determineNamer(compiler),
         oneShotInterceptors = new Map<jsAst.Name, Selector>(),
         interceptedElements = new Map<String, Set<Element>>(),
-        rti = new RuntimeTypes(compiler),
+        rti = new _RuntimeTypes(compiler),
+        rtiEncoder = new _RuntimeTypesEncoder(compiler),
         specializedGetInterceptors = new Map<jsAst.Name, Set<ClassElement>>(),
         annotations = new Annotations(compiler),
         this.sourceInformationStrategy =
             generateSourceMap
                 ? (useNewSourceInfo
                      ? const PositionSourceInformationStrategy()
                      : const StartEndSourceInformationStrategy())
                 : const JavaScriptSourceInformationStrategy(),
         super(compiler) {
     emitter = new CodeEmitterTask(
@@ skipping 2567 matching lines @@
                                 TypeVariableElement variable) {
     assert(registry.isForResolution);
     registerBackendStaticInvocation(backend.getSetRuntimeTypeInfo(), registry);
     registerBackendStaticInvocation(backend.getGetRuntimeTypeInfo(), registry);
     backend.registerGetRuntimeTypeArgument(registry);
     registerBackendInstantiation(backend.compiler.listClass, registry);
     registerBackendStaticInvocation(backend.getRuntimeTypeToString(), registry);
     registerBackendStaticInvocation(backend.getCreateRuntimeType(), registry);
     needsInt(registry, 'Needed for accessing a type variable literal on this.');
     ClassElement cls = variable.enclosingClass;
-    backend.rti.classesUsingTypeVariableExpression.add(cls);
+    backend.rti.registerClassUsingTypeVariableExpression(cls);
   }
 
   // TODO(johnniwinther): Maybe split this into [onAssertType] and [onTestType].
   void onIsCheck(DartType type, Registry registry) {
     assert(registry.isForResolution);
     type = type.unalias(backend.resolution);
     registerBackendInstantiation(backend.compiler.boolClass, registry);
     bool inCheckedMode = backend.compiler.enableTypeAssertions;
     if (inCheckedMode) {
       registerBackendStaticInvocation(backend.getThrowRuntimeError(), registry);
@@ skipping 152 matching lines @@
   }
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }