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 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
