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

tests/language/bailout7_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 to make sure the do/while loop exit condition is generated.
+
+var global;
+
+class A {
+  var array;
+
+  initArray() {
+    if (global[0] == null) {
+      return [2];
+    } else {
+      var map = new Map();
+      map[0] = 2;
+      return map;
+    }
+  }
+
+  bar() {
+    array = initArray();
+    var element;
+    do {
+      element = array[0]; // bailout here
+      if (element is Map) continue;
+      if (element == null) break;
+    } while (element != 2);
+    return global[0]; // bailout here
+  }
+}
+
+
+void main() {
+  global = [2];
+  for (int i = 0; i < 2; i++) {
+    Expect.equals(2, new A().bar());
+  }
+
+  global = new Map();
+  global[0] = 2;
+  for (int i = 0; i < 2; i++) {
+    Expect.equals(2, new A().bar());
+  }
+}