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.copy;
 24 
 25 import org.openjdk.jmh.annotations.Benchmark;
 26 import org.openjdk.jmh.annotations.CompilerControl;
 27 import org.openjdk.jmh.annotations.Setup;
 28 
 29 public class Identity extends CopyBase {
 30 
 31     public static class RefWrapper {
 32         public IdentityInt f;
 33 
 34         public RefWrapper(IdentityInt f) {
 35             this.f = f;
 36         }
 37     }
 38 
 39     public static class IntWrapper {
 40         public InterfaceInt f;
 41 
 42         public IntWrapper(IdentityInt f) {
 43             this.f = f;
 44         }
 45     }
 46 
 47 
 48     public interface InterfaceInt {
 49         public int value();
 50     }
 51 
 52     public static class IdentityInt implements InterfaceInt {
 53         public final int value;
 54         public IdentityInt(int value) {
 55             this.value = value;
 56         }
 57         public int value() {
 58             return value;
 59         }
 60     }
 61 
 62 
 63     public static class RefState extends SizeState {
 64         public RefWrapper[] arr;
 65 
 66         @Setup
 67         public void setup() {
 68             arr = new RefWrapper[size];
 69             for (int i = 0; i < size; i++) {
 70                 arr[i] = new RefWrapper(new IdentityInt(i));
 71             }
 72         }
 73     }
 74 
 75     public static class IntState extends SizeState {
 76         public IntWrapper[] arr;
 77 
 78         @Setup
 79         public void setup() {
 80             arr = new IntWrapper[size];
 81             for (int i = 0; i < size; i++) {
 82                 arr[i] = new IntWrapper(new IdentityInt(i));
 83             }
 84         }
 85     }
 86 
 87     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 88     public void copy(RefWrapper[] dst, RefWrapper[] src) {
 89         for (int i = 0; i < src.length; i++) {
 90             dst[i].f = src[i].f;
 91         }
 92     }
 93 
 94     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 95     public void copy_to_int(IntWrapper[] dst, RefWrapper[] src) {
 96         for (int i = 0; i < src.length; i++) {
 97             dst[i].f = src[i].f;
 98         }
 99     }
100 
101     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
102     public void copy_to_ref(RefWrapper[] dst, IntWrapper[] src) {
103         for (int i = 0; i < src.length; i++) {
104             dst[i].f = (IdentityInt) src[i].f;
105         }
106     }
107 
108     @Benchmark
109     public void copy_ref(RefState st1, RefState st2) {
110         copy(st1.arr, st2.arr);
111     }
112 
113     @Benchmark
114     public void copy_ref_to_int(IntState st1, RefState st2) {
115         copy_to_int(st1.arr, st2.arr);
116     }
117 
118     @Benchmark
119     public void copy_int_to_ref(RefState st1, IntState st2) {
120         copy_to_ref(st1.arr, st2.arr);
121     }
122 
123 }