Support checked mode

pkg/compiler/lib/src/ssa/builder.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.
 
 import 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 1728 matching lines @@
   /// Use sparingly. In order for the comment to be retained it is modeled as
   /// having side effects which will inhibit code motion.
   // TODO(sra): Figure out how to keep comment anchored without effects.
   void addComment(String text) {
     add(new HForeignCode(js.js.statementTemplateYielding(new js.Comment(text)),
         backend.dynamicType, <HInstruction>[],
         isStatement: true));
   }
 
   HGraph buildCheckedSetter(VariableElement field) {
-    openFunction(field, field.node);
+    ResolvedAst resolvedAst = field.resolvedAst;
+    openFunction(field, resolvedAst.node);
     HInstruction thisInstruction = localsHandler.readThis();
     // Use dynamic type because the type computed by the inferrer is
     // narrowed to the type annotation.
     HInstruction parameter = new HParameterValue(field, backend.dynamicType);
     // Add the parameter as the last instruction of the entry block.
     // If the method is intercepted, we want the actual receiver
     // to be the first parameter.
     graph.entry.addBefore(graph.entry.last, parameter);
     HInstruction value = potentiallyCheckOrTrustType(parameter, field.type);
     add(new HFieldSet(field, thisInstruction, value));
@@ skipping 6865 matching lines @@
   const _LoopTypeVisitor();
   int visitNode(ast.Node node) => HLoopBlockInformation.NOT_A_LOOP;
   int visitWhile(ast.While node) => HLoopBlockInformation.WHILE_LOOP;
   int visitFor(ast.For node) => HLoopBlockInformation.FOR_LOOP;
   int visitDoWhile(ast.DoWhile node) => HLoopBlockInformation.DO_WHILE_LOOP;
   int visitAsyncForIn(ast.AsyncForIn node) => HLoopBlockInformation.FOR_IN_LOOP;
   int visitSyncForIn(ast.SyncForIn node) => HLoopBlockInformation.FOR_IN_LOOP;
   int visitSwitchStatement(ast.SwitchStatement node) =>
       HLoopBlockInformation.SWITCH_CONTINUE_LOOP;
 }