1 /*
 2  * Copyright (c) 2020, 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.acmp.trivial;
24 
25 import org.openjdk.bench.valhalla.types.R64long;
26 import org.openjdk.jmh.annotations.Benchmark;
27 import org.openjdk.jmh.annotations.BenchmarkMode;
28 import org.openjdk.jmh.annotations.CompilerControl;
29 import org.openjdk.jmh.annotations.Fork;
30 import org.openjdk.jmh.annotations.Measurement;
31 import org.openjdk.jmh.annotations.Mode;
32 import org.openjdk.jmh.annotations.OutputTimeUnit;
33 import org.openjdk.jmh.annotations.Scope;
34 import org.openjdk.jmh.annotations.State;
35 import org.openjdk.jmh.annotations.Warmup;
36 
37 import java.util.concurrent.TimeUnit;
38 
39 /*
40  * to provide proper measurement the benchmark have to be executed in two modes:
41  *  -wm INDI
42  *  -wm BULK
43  */
44 
45 @Fork(1)
46 @Warmup(iterations = 3, time = 1)
47 @Measurement(iterations = 5, time = 1)
48 @OutputTimeUnit(TimeUnit.NANOSECONDS)
49 @BenchmarkMode(Mode.AverageTime)
50 @State(Scope.Thread)
51 public class IdentityTrivialNotEquals {
52 
53     Object o1 = new R64long(1);
54     Object o2 = new R64long(2);
55 
56     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
57     private static boolean cmpNotEquals(Object a, Object b) {
58         return a != b; // new acmp
59     }
60 
61     @Benchmark
62     public boolean isNotCmp_null_null() {
63         return cmpNotEquals(null, null);
64     }
65 
66     @Benchmark
67     public boolean isNotCmp_o1_null() {
68         return cmpNotEquals(o1, null);
69     }
70 
71     @Benchmark
72     public boolean isNotCmp_null_o1() {
73         return cmpNotEquals(null, o1);
74     }
75 
76     @Benchmark
77     public boolean isNotCmp_o1_o1() {
78         return cmpNotEquals(o1, o1);
79     }
80 
81     @Benchmark
82     public boolean isNotCmp_o1_o2() {
83         return cmpNotEquals(o1, o2);
84     }
85 
86 }