1/*
2 * Copyright (C) 2017 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
17public class Main {
18
19  public static void foo(float f) {
20    // The reason this used to break:
21    // 1) We inline the 'foo' call, so blocks now only contain HLoadClass instructions.
22    // 2) We then run the select_generator pass, which cannot change the
23    //    if/else because blocks contain instructions.
24    // 3) We run GVN which will remove the HLoadClass instructions in the blocks.
25    // 4) At code generation, we are in the unlikely situation that a diamond shape
26    //    contains no instruction (usually removed by select_generator). This used
27    //    to trip the ARM code generators.
28    if (f < 1.2f) {
29      foo(Main.class, Object.class);
30      if (f < 0.2f) {
31        foo(Main.class, Object.class);
32      } else {
33        foo(Main.class, Object.class);
34      }
35    } else {
36      System.out.println("Hello World: " + f);
37    }
38  }
39
40  public static void foo(Object a, Object b) {}
41
42  public static void main(String[] args) {
43    foo(0f);
44    foo(4f);
45    foo(0.1f);
46  }
47}
48