1/*
2 * Copyright (C) 2015 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
18public class Main {
19  public int x = 0;
20
21  public Main(Main c) {
22    // After inlining the graph will look like:
23    //     NullCheck c
24    //     InstanceFieldGet c
25    //     InstanceFieldSet this 3
26    // The dead code will eliminate the InstanceFieldGet and we'll end up with:
27    //     NullCheck c
28    //     InstanceFieldSet this 3
29    // At codegen, when verifying if we can move the null check to the user,
30    // we should check that we actually have the same user (not only that the
31    // next instruction can do implicit null checks).
32    // In this case we should generate code for the NullCheck since the next
33    // instruction checks a different object.
34    c.willBeInlined();
35    x = 3;
36  }
37
38  private int willBeInlined() {
39    return x;
40  }
41
42  public static void main(String[] args) {
43    try {
44      new Main(null);
45      throw new RuntimeException("Failed to throw NullPointerException");
46    } catch (NullPointerException e) {
47      // expected
48    }
49  }
50}
51