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 Value128NullFree extends WalkBase {
 33 
 34     public interface InterfaceInt {
 35         public int value();
 36     }
 37 
 38     public static value class ValueInt4 implements InterfaceInt {
 39 
 40         public final int prevalue0;
 41         public final int prevalue1;
 42         public final int prevalue2;
 43         public final int value;
 44 
 45         public ValueInt4(int value) {
 46             this.prevalue0 = value;
 47             this.prevalue1 = value;
 48             this.prevalue2 = value;
 49             this.value = value;
 50         }
 51 
 52         public int value() {
 53             return value;
 54         }
 55 
 56     }
 57 
 58     public static class ValState extends SizeState {
 59         public ValueInt4[] arr;
 60 
 61         @Setup
 62         public void setup() {
 63             arr = (ValueInt4[]) ValueClass.newNullRestrictedAtomicArray(ValueInt4.class, size, new ValueInt4(0));
 64             int[] a = makeRandomRing(arr.length);
 65             for (int i = 0; i < a.length; i++) {
 66                 arr[i] = new ValueInt4(a[i]);
 67             }
 68         }
 69     }
 70 
 71     public static class IntState extends SizeState {
 72         public InterfaceInt[] arr;
 73 
 74         @Setup
 75         public void setup() {
 76             arr = new InterfaceInt[size];
 77             int[] a = makeRandomRing(arr.length);
 78             for (int i = 0; i < a.length; i++) {
 79                 arr[i] = new ValueInt4(a[i]);
 80             }
 81         }
 82     }
 83 
 84     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 85     private static int walk_val(ValueInt4[] values) {
 86         int steps = 0;
 87         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 88         return steps;
 89     }
 90 
 91     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
 92     private static int walk_int(InterfaceInt[] values) {
 93         int steps = 0;
 94         for (int i = values[0].value(); i != 0; i = values[i].value()) steps++;
 95         return steps;
 96     }
 97 
 98     @Benchmark
 99     public int walk_val_as_val(ValState st) {
100         return walk_val(st.arr);
101     }
102 
103     @Benchmark
104     public int walk_int_as_int(IntState st) {
105         return walk_int(st.arr);
106     }
107 
108 }