Bugfixes in CPS RecursiveVisitor and ParentVisitor.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart

 // Copyright (c) 2013, 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.
 
 // IrNodes are kept in a separate library to have precise control over their
 // dependencies on other parts of the system.
 library dart2js.ir_nodes;
 
 import '../constants/expressions.dart';
 import '../constants/values.dart' as values show ConstantValue;
@@ skipping 965 matching lines @@
   visitConstructorDefinition(ConstructorDefinition node) {
     processConstructorDefinition(node);
     node.parameters.forEach(visit);
     node.initializers.forEach(visit);
     visit(node.body);
   }
 
   processFieldInitializer(FieldInitializer node) {}
   visitFieldInitializer(FieldInitializer node) {
     processFieldInitializer(node);
-    visit(node.body.body);
+    visit(node.body);
   }
 
   processSuperInitializer(SuperInitializer node) {}
   visitSuperInitializer(SuperInitializer node) {
     processSuperInitializer(node);
-    node.arguments.forEach(
-        (RunnableBody argument) => visit(argument.body));
+    node.arguments.forEach(visit);
   }
 
   // Expressions.
 
   processLetPrim(LetPrim node) {}
   visitLetPrim(LetPrim node) {
     processLetPrim(node);
     visit(node.primitive);
     visit(node.body);
   }
@@ skipping 128 matching lines @@
   }
 
   processMutableVariable(node) {}
   visitMutableVariable(MutableVariable node) {
     processMutableVariable(node);
   }
 
   processGetMutableVariable(GetMutableVariable node) {}
   visitGetMutableVariable(GetMutableVariable node) {
     processGetMutableVariable(node);
+    processReference(node.variable);
   }
 
   processParameter(Parameter node) {}
   visitParameter(Parameter node) => processParameter(node);
 
   processContinuation(Continuation node) {}
   visitContinuation(Continuation node) {
     processContinuation(node);
     node.parameters.forEach(visitParameter);
     if (node.body != null) visit(node.body);
@@ skipping 290 matching lines @@
 
   void visitIdentical(Identical node) {
     visitReference(node.left);
     visitReference(node.right);
   }
 
   void visitInterceptor(Interceptor node) {
     visitReference(node.input);
   }
 }