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 jdk.internal.value.ValueClass;
 26 import org.openjdk.jmh.annotations.Benchmark;
 27 import org.openjdk.jmh.annotations.CompilerControl;
 28 import org.openjdk.jmh.annotations.Fork;
 29 import org.openjdk.jmh.annotations.Setup;
 30 
 31 @Fork(value = 3, jvmArgsAppend = {"--enable-preview", "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED"})
 32 public class Value032NullFree extends WalkBase {
 33 
 34     public interface InterfaceInt {
 35         public int value();
 36     }
 37 
 38     public static value class ValueInt implements InterfaceInt {
 39 
 40         public final int value;
 41 
 42         public ValueInt(int value) {
 43             this.value = value;
 44         }
 45 
 46         public int value() {
 47             return value;
 48         }
 49 
 50     }
 51 
 52     public static  class ValState extends SizeState {
 53         public ValueInt[] arr;
 54 
 55         @Setup
 56         public void setup() {
 57             arr = (ValueInt[]) ValueClass.newNullRestrictedAtomicArray(ValueInt.class, size, new ValueInt(0));
 58             int[] a = makeRandomRing(arr.length);
 59             for (int i = 0; i < a.length; i++) {
 60                 arr[i] = new ValueInt(a[i]);
 61             }
 62         }
 63     }
 64 
 65     public static class IntState extends SizeState {
 66         public InterfaceInt[] arr;
 67 
 68         @Setup
 69         public void setup() {
 70             arr = new InterfaceInt[size];
 71             int[] a = makeRandomRing(arr.length);
 72             for (int i = 0; i < a.length; i++) {
 73                 arr[i] = new ValueInt(a[i]);
 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 }