1 /*
2  * Copyright (C) 2024 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 {
main(String[] args)18     public static void main(String[] args) {
19         // Test with even/odd input, and even/odd amount of loop iterations.
20         assertEquals(-33, $noinline$TwoBitwiseOperations(32, 4));
21         assertEquals(1, $noinline$TwoBitwiseOperations(32, 5));
22         assertEquals(-31, $noinline$TwoBitwiseOperations(31, 4));
23         assertEquals(0, $noinline$TwoBitwiseOperations(31, 5));
24     }
25 
26     /// CHECK-START-ARM: int Main.$noinline$TwoBitwiseOperations(int, int) instruction_simplifier_arm (after)
27     /// CHECK:       BitwiseNegatedRight kind:And
28     /// CHECK:       BitwiseNegatedRight kind:Or
29 
30     /// CHECK-START-ARM64: int Main.$noinline$TwoBitwiseOperations(int, int) instruction_simplifier_arm64 (after)
31     /// CHECK:       BitwiseNegatedRight kind:And
32     /// CHECK:       BitwiseNegatedRight kind:Or
33 
34     /// CHECK-START-{ARM,ARM64}: int Main.$noinline$TwoBitwiseOperations(int, int) disassembly (after)
35     /// CHECK:       BitwiseNegatedRight kind:And
36     /// CHECK:       BitwiseNegatedRight kind:Or
$noinline$TwoBitwiseOperations(int a, int n)37     private static int $noinline$TwoBitwiseOperations(int a, int n) {
38         int result = 0;
39         for (int i = 0; i < n; ++i) {
40             if (i % 2 == 0) {
41                 result = (~a) & 1;
42             } else {
43                 result = (~a) | 1;
44             }
45         }
46         return result;
47     }
48 
assertEquals(int expected, int actual)49     public static void assertEquals(int expected, int actual) {
50         if (expected != actual) {
51             throw new Error("Expected: " + expected + ", found: " + actual);
52         }
53     }
54 }
55