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.invoke;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.BenchmarkMode;
27 import org.openjdk.jmh.annotations.CompilerControl;
28 import org.openjdk.jmh.annotations.Fork;
29 import org.openjdk.jmh.annotations.Measurement;
30 import org.openjdk.jmh.annotations.Mode;
31 import org.openjdk.jmh.annotations.OutputTimeUnit;
32 import org.openjdk.jmh.annotations.Param;
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 @Fork(3)
40 @Warmup(iterations = 5, time = 1)
41 @Measurement(iterations = 5, time = 1)
42 @OutputTimeUnit(TimeUnit.NANOSECONDS)
43 @BenchmarkMode(Mode.AverageTime)
44 @State(Scope.Thread)
45 public class InlineRec {
46 
47     @Param("100")
48     public int depth;
49 
50     public static primitive class V {
51         final int v;
52 
53         public V(int v) {
54             this.v = v;
55         }
56 
57         public V addL(V y) {
58             return this.v == 0 ? y : new V(this.v - 1).addL(new V(y.v + 1));
59         }
60 
61         public V addR(V y) {
62             return y.v == 0 ? this : new V(this.v + 1).addR(new V(y.v - 1));
63         }
64     }
65 
66     public static V s_addL(V x, V y) {
67         return x.v == 0 ? y : s_addL(new V(x.v - 1), new V(y.v + 1));
68     }
69 
70     public static V s_addR(V x, V y) {
71         return y.v == 0 ? x : s_addR(new V(x.v + 1), new V(y.v - 1));
72     }
73 
74     @Benchmark
75     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
76     public int statL() {
77         return s_addL(new V(depth), new V(depth)).v;
78     }
79 
80     @Benchmark
81     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
82     public int statR() {
83         return s_addR(new V(depth), new V(depth)).v;
84     }
85 
86     @Benchmark
87     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
88     public int instL() {
89         return new V(depth).addL(new V(depth)).v;
90     }
91 
92     @Benchmark
93     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
94     public int instR() {
95         return new V(depth).addR(new V(depth)).v;
96     }
97 
98 
99 }