1 /* 2 * Copyright (c) 2015, 2015, 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.graalvm.compiler.microbenchmarks.graal; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.Warmup; 27 28 import org.graalvm.compiler.graph.Graph; 29 import org.graalvm.compiler.microbenchmarks.graal.util.GraalState; 30 import org.graalvm.compiler.microbenchmarks.graal.util.GraphState; 31 import org.graalvm.compiler.microbenchmarks.graal.util.MethodSpec; 32 import org.graalvm.compiler.nodes.StructuredGraph; 33 34 /** 35 * Benchmarks the performance of {@link Graph#copy()}. 36 */ 37 public class GraphCopyBenchmark extends GraalBenchmark { 38 39 @MethodSpec(declaringClass = ConditionalEliminationBenchmark.class, name = "nullnessSnippet") 40 public static class Nullness extends GraphState { 41 } 42 43 @SuppressWarnings("unused") 44 public static int nullnessSnippet(Object a, Object b) { 45 if (a == null) { 46 if (a == b) { 47 if (b == null) { 48 return 1; 49 } else { 50 return -2; 51 } 52 } else { 53 if (b == null) { 54 return -3; 55 } else { 56 return 4; 57 } 58 } 59 } else { 60 if (a == b) { 61 if (b == null) { 62 return -5; 63 } else { 64 return 6; 65 } 66 } else { 67 if (b == null) { 68 return 7; 69 } else { 70 return 8; 71 } 72 } 73 } 74 } 75 76 @Benchmark 77 @Warmup(iterations = 20) 78 public StructuredGraph nullness(Nullness s, @SuppressWarnings("unused") GraalState g) { 79 return (StructuredGraph) s.graph.copy(); 80 } 81 82 @MethodSpec(declaringClass = GraphCopyBenchmark.class, name = "searchSnippet") 83 public static class Search extends GraphState { 84 } 85 86 static class Entry { 87 final String name; 88 89 Entry(String name) { 90 this.name = name; 91 } 92 } 93 94 static class EntryWithNext extends Entry { 95 EntryWithNext(String name, Entry next) { 96 super(name); 97 this.next = next; 98 } 99 100 final Entry next; 101 } 102 103 public static Entry searchSnippet(Entry start, String name, Entry alternative) { 104 Entry current = start; 105 do { 106 while (current instanceof EntryWithNext) { 107 if (name != null && current.name == name) { 108 current = null; 109 } else { 110 Entry next = ((EntryWithNext) current).next; 111 current = next; 112 } 113 } 114 115 if (current != null) { 116 if (current.name.equals(name)) { 117 return current; 118 } 119 } 120 if (current == alternative) { 121 return null; 122 } 123 current = alternative; 124 125 } while (true); 126 } 127 128 @Benchmark 129 @Warmup(iterations = 20) 130 public StructuredGraph search(Search s, @SuppressWarnings("unused") GraalState g) { 131 return (StructuredGraph) s.graph.copy(); 132 } 133 }