Fix another bailout problem where not all blocks were visiting when propagating bailout information…

tests/language/bailout6_test.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.
+
+// Test for dart2js to make sure the computed bailout environment is
+// correct.
+
+var global;
+
+class A {
+  var array;
+
+  foo() {
+    do {
+      var element = global;
+      if (element is Map) continue;
+      if (element is num) break;
+    } while (true);
+    return array[0]; // bailout here.
+  }
+}
+
+void main() {
+  var a = new A();
+  a.array = [42];
+  global = 42;
+
+  for (int i = 0; i < 2; i++) {
+    Expect.equals(42, a.foo());
+  }
+
+  a.array = new Map();
+  a.array[0] = 42;
+  for (int i = 0; i < 2; i++) {
+    Expect.equals(42, a.foo());
+  }
+  global = null;
+}