Support for loops in analyzer2dart.

pkg/analyzer2dart/lib/src/cps_generator.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 analyzer2dart.cps_generator;
 
 import 'package:analyzer/analyzer.dart';
 
 import 'package:compiler/implementation/dart_types.dart' as dart2js;
 import 'package:compiler/implementation/elements/elements.dart' as dart2js;
@@ skipping 284 matching lines @@
     irBuilder.buildIf(
         build(node.condition),
         subbuild(node.thenStatement),
         subbuild(node.elseStatement));
   }
 
   @override
   visitBlock(Block node) {
     irBuilder.buildBlock(node.statements, build);
   }
+
+  @override
+  visitForStatement(ForStatement node) {
+    // TODO(johnniwinther): Support `for` as a jump target.
+    SubbuildFunction buildInitializer;
+    if (node.variables != null) {
+      buildInitializer = subbuild(node.variables);
+    } else {
+      buildInitializer = subbuild(node.initialization);
+    }
+    irBuilder.buildFor(buildInitializer: buildInitializer,
+                       buildCondition: subbuild(node.condition),
+                       buildBody: subbuild(node.body),
+                       buildUpdate: subbuildSequence(node.updaters));
+  }
 }