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.array.walk;
 24 
 25 import org.openjdk.jmh.annotations.Benchmark;
 26 import org.openjdk.jmh.annotations.CompilerControl;
 27 import org.openjdk.jmh.annotations.Fork;
 28 import org.openjdk.jmh.annotations.Setup;
 29 
 30 @Fork(value = 3, jvmArgsAppend = {"--enable-preview"})
 31 public class Value032 extends WalkBase {
 32 
 33     public interface InterfaceInt {
 34         public int value();
 35     }
 36 
 37     public static value class ValueInt implements InterfaceInt {
 38 
 39         public final int value;
 40 
 41         public ValueInt(int value) {
 42             this.value = value;
 43         }
 44 
 45         public int value() {
 46             return value;
 47         }
 48 
 49     }
 50 
 51     public static class ValState extends SizeState {
 52         public ValueInt[] arr;
 53 
 54         @Setup
 55         public void setup() {
 56             arr = new ValueInt[size];
 57             int[] a = makeRandomRing(arr.length);
 58             for (int i = 0; i < a.length; i++) {
 59                 arr[i] = new ValueInt(a[i]);
 60             }
 61         }
 62     }
 63 
 64     public static class IntState extends SizeState {
 65         public InterfaceInt[] arr;
 66 
 67         @Setup
 68         public void setup() {
 69             arr = new InterfaceInt[size];
 70             int[] a = makeRandomRing(arr.length);
 71             for (int i = 0; i < a.length; i++) {
 72                 arr[i] = new ValueInt(a[i]);
 73             }
 74         }
 75 
 76     }
 77 
 78     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 79     private static int walk_val(ValueInt[] values) {
 80         int steps = 0;
 81         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 82         return steps;
 83     }
 84 
 85     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 86     private static int walk_int(InterfaceInt[] values) {
 87         int steps = 0;
 88         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 89         return steps;
 90     }
 91 
 92     @Benchmark
 93     public int walk_val_as_val(ValState st) {
 94         return walk_val(st.arr);
 95     }
 96 
 97     @Benchmark
 98        public int walk_int_as_int(IntState st) {
 99         return walk_int(st.arr);
100     }
101 
102 }