dart2js cps: Make Identical a built-in and add Interceptor to Tree IR.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

 // Copyright (c) 2014, 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 code_generator;
 
 import 'glue.dart';
 
 import '../../tree_ir/tree_ir_nodes.dart' as tree_ir;
 import '../../tree_ir/tree_ir_nodes.dart' show BuiltinOperator;
@@ skipping 575 matching lines @@
     js.Expression kind = js.number(node.selector.invocationMirrorKind);
     js.Expression arguments = new js.ArrayInitializer(
         visitExpressionList(node.arguments));
     js.Expression argumentNames = new js.ArrayInitializer(
         node.selector.namedArguments.map(js.string).toList(growable: false));
     return buildStaticHelperInvocation(glue.createInvocationMirrorMethod,
         <js.Expression>[name, internalName, kind, arguments, argumentNames]);
   }
 
   @override
+  js.Expression visitInterceptor(tree_ir.Interceptor node) {
+    glue.registerUseInterceptorInCodegen();
+    registry.registerSpecializedGetInterceptor(node.interceptedClasses);
+    String helperName = glue.getInterceptorName(node.interceptedClasses);
+    js.Expression globalHolder = glue.getInterceptorLibrary();
+    return js.js('#.#(#)',
+        [globalHolder, helperName, visitExpression(node.input)]);
+  }
+
+  @override
   js.Expression visitGetField(tree_ir.GetField node) {
     return new js.PropertyAccess.field(
         visitExpression(node.object),
         glue.instanceFieldPropertyName(node.field));
   }
 
   @override
   js.Assignment visitSetField(tree_ir.SetField node) {
     js.PropertyAccess field =
         new js.PropertyAccess.field(
@@ skipping 104 matching lines @@
         return new js.Binary('<', args[0], args[1]);
       case BuiltinOperator.NumLe:
         return new js.Binary('<=', args[0], args[1]);
       case BuiltinOperator.NumGt:
         return new js.Binary('>', args[0], args[1]);
       case BuiltinOperator.NumGe:
         return new js.Binary('>=', args[0], args[1]);
       case BuiltinOperator.StringConcatenate:
         if (args.isEmpty) return js.string('');
         return args.reduce((e1,e2) => new js.Binary('+', e1, e2));
+      case BuiltinOperator.Identical:
+        registry.registerStaticInvocation(glue.identicalFunction);
+        return buildStaticHelperInvocation(glue.identicalFunction, args);
       case BuiltinOperator.StrictEq:
         return new js.Binary('===', args[0], args[1]);
       case BuiltinOperator.StrictNeq:
         return new js.Binary('!==', args[0], args[1]);
       case BuiltinOperator.LooseEq:
         return new js.Binary('==', args[0], args[1]);
       case BuiltinOperator.LooseNeq:
         return new js.Binary('!=', args[0], args[1]);
       case BuiltinOperator.IsFalsy:
         return new js.Prefix('!', args[0]);
       case BuiltinOperator.IsNumber:
         return js.js("typeof # === 'number'", args);
       case BuiltinOperator.IsNotNumber:
         return js.js("typeof # !== 'number'", args);
       case BuiltinOperator.IsFloor:
         return js.js("Math.floor(#) === #", args);
       case BuiltinOperator.IsNumberAndFloor:
         return js.js("typeof # === 'number' && Math.floor(#) === #", args);
     }
   }
 
   visitFunctionExpression(tree_ir.FunctionExpression node) {
     // FunctionExpressions are currently unused.
     // We might need them if we want to emit raw JS nested functions.
     throw 'FunctionExpressions should not be used';
   }
 }