dart2js cps: Clean up and avoid processing unreachable code.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.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 dart2js.ir_nodes_sexpr;
 
 import '../constants/values.dart';
 import '../util/util.dart';
 import 'cps_ir_nodes.dart';
 import '../universe/call_structure.dart' show
@@ skipping 183 matching lines @@
 
   String visitUnreachable(Unreachable node) {
     return '$indentation(Unreachable)';
   }
 
   String visitConstant(Constant node) {
     String value = node.value.accept(new ConstantStringifier(), null);
     return '(Constant $value)';
   }
 
-  String visitCreateFunction(CreateFunction node) {
-    String function =
-        indentBlock(() => indentBlock(() => visit(node.definition)));
-    return '(CreateFunction\n$function)';
-  }
-
   String visitContinuation(Continuation node) {
     String name = newContinuationName(node);
     if (node.isRecursive) name = 'rec $name';
     // TODO(karlklose): this should be changed to `.map(visit).join(' ')`  and
     // should recurse to [visit].  Currently we can't do that, because the
     // unstringifier_test produces [LetConts] with dummy arguments on them.
     String parameters = node.parameters
         .map((p) => '${decorator(p, newValueName(p))}')
         .join(' ');
     String body = indentBlock(() => indentBlock(() => visit(node.body)));
@@ skipping 11 matching lines @@
 
   String visitTypeCast(TypeCast node) {
     String value = access(node.value);
     String typeArguments = node.typeArguments.map(access).join(' ');
     return '(TypeCast $value ${node.dartType} ($typeArguments))';
   }
 
   String visitTypeTest(TypeTest node) {
     String value = access(node.value);
     String typeArguments = node.typeArguments.map(access).join(' ');
-    String interceptor = node.interceptor == null
-        ? ''
-        : access(node.interceptor);
-    return '(TypeTest $value ${node.dartType} ($typeArguments) ($interceptor))';
+    return '(TypeTest $value ${node.dartType} ($typeArguments))';
   }
 
   String visitTypeTestViaFlag(TypeTestViaFlag node) {
     String interceptor = access(node.interceptor);
     return '(TypeTestViaFlag $interceptor ${node.dartType})';
   }
 
   String visitLiteralList(LiteralList node) {
     String values = node.values.map(access).join(' ');
     return '(LiteralList ($values))';
@@ skipping 227 matching lines @@
   void setReturnContinuation(Continuation node) {
     assert(!_names.containsKey(node) || _names[node] == 'return');
     _names[node] = 'return';
   }
 
   String getName(Node node) {
     if (!_names.containsKey(node)) return 'MISSING_NAME';
     return _names[node];
   }
 }