1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 class SuperClass {
18 }
19 
20 class ChildClass extends SuperClass {
21 }
22 
23 public class Main {
24 
25   /// CHECK-START:    void Main.main(java.lang.String[]) builder (after)
26   /// CHECK:          BoundType  klass:SuperClass can_be_null:false exact:false
27 
28   /// CHECK-START:    void Main.main(java.lang.String[]) builder (after)
29   /// CHECK-NOT:      BoundType  klass:SuperClass can_be_null:false exact:true
main(String[] args)30   public static void main(String[] args) {
31     Object obj = new ChildClass();
32 
33     // We need a fixed point iteration to hit the bogus type update
34     // of 'obj' below, so create a loop that updates the type of 'obj'.
35     for (int i = 1; i < 1; i++) {
36       obj = new Object();
37     }
38 
39     if (obj instanceof SuperClass) {
40       // We used to wrongly type obj as an exact SuperClass from this point,
41       // meaning we were statically determining that the following instanceof
42       // would always fail.
43       if (!(obj instanceof ChildClass)) {
44         throw new Error("Expected a ChildClass, got " + obj.getClass());
45       }
46     }
47   }
48 }
49