1 /*
 2  * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package org.openjdk.bench.valhalla.field.read;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.CompilerControl;
27 import org.openjdk.jmh.annotations.Setup;
28 import org.openjdk.jmh.infra.Blackhole;
29 
30 public class Identity extends ReadBase {
31 
32     public static class RefWrapper {
33         public IdentityInt f;
34 
35         public RefWrapper(IdentityInt f) {
36             this.f = f;
37         }
38     }
39 
40     public interface InterfaceInt {
41         public int value();
42     }
43 
44     public static class IdentityInt implements InterfaceInt {
45         public final int value;
46         public IdentityInt(int value) {
47             this.value = value;
48         }
49         public int value() {
50             return value;
51         }
52     }
53 
54 
55     public static class RefState extends SizeState {
56         public RefWrapper[] arr;
57 
58         @Setup
59         public void setup() {
60             arr = new RefWrapper[size];
61             for (int i = 0; i < size; i++) {
62                 arr[i] = new RefWrapper(new IdentityInt(i));
63             }
64         }
65     }
66 
67     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
68     public void read_ref(RefWrapper[] src, Blackhole bh) {
69         for (int i = 0; i < src.length; i++) {
70             bh.consume(src[i].f);
71         }
72     }
73 
74 
75     @Benchmark
76     public void read(RefState st1, Blackhole bh) {
77         read_ref(st1.arr, bh);
78     }
79 
80 }