Compute frontend/backend specific constants.

tests/language/const_switch2_test.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 canonicalization.test.canonizalization1_test;
+import 'package:expect/expect.dart';
 
-import 'package:polymer/polymer.dart';
-import 'common.dart';
-
-@initMethod main() => tests();
+int main() {
+  var a = [1,2,3][2];
+  switch (a) {
+    case 0.0:            /// 01: compile-time error
+      print("illegal");  /// 01: continued
+    case 1:
+      print("OK");
+  }
+}