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 
17 public class Main {
18 
foo(float f)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 
foo(Object a, Object b)40   public static void foo(Object a, Object b) {}
41 
main(String[] args)42   public static void main(String[] args) {
43     foo(0f);
44     foo(4f);
45     foo(0.1f);
46   }
47 }
48