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
17public class Main {
18
19  public static void main(String[] args) {
20    Object[] array = { new Integer(1), new Integer(2), new Integer(3) };
21    int result = test(array, 0, 2);
22    System.out.println(result);
23  }
24
25  // This test method uses two integers (`index1` and `index2`) to
26  // force the register allocator to use some high registers (R8-R15)
27  // on x86-64 in the code generated for the first CheckCast (which
28  // converts `new_array` to an `Object[]`), so as to produce code
29  // containing a conditional jump whose offset does not fit in a
30  // NearLabel when using Baker's read barrier fast path (because
31  // x86-64 instructions using these high registers have a larger
32  // encoding).
33  //
34  // The intent of this artifical constraint is to ensure the initial
35  // failure is properly tested by this regression test.
36
37  /// CHECK-START: int Main.test(java.lang.Object, int, int) register (after)
38  /// CHECK-DAG:     CheckCast check_kind:array_object_check
39  /// CHECK-DAG:     CheckCast check_kind:exact_check
40  /// CHECK-DAG:     CheckCast check_kind:exact_check
41
42  static public int test(Object new_array, int index1, int index2) {
43    Object[] objectArray = (Object[]) new_array;
44    Integer integer1 = (Integer) objectArray[index1];
45    Integer integer2 = (Integer) objectArray[index2];
46    return integer1.intValue() + integer2.intValue();
47  }
48
49}
50