| /* |
| * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.microbenchmarks.graal; |
| |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Warmup; |
| |
| import org.graalvm.compiler.microbenchmarks.graal.util.GraalState; |
| import org.graalvm.compiler.microbenchmarks.graal.util.GraphState; |
| import org.graalvm.compiler.microbenchmarks.graal.util.MethodSpec; |
| import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| |
| public class ConditionalEliminationBenchmark extends GraalBenchmark { |
| |
| @MethodSpec(declaringClass = ConditionalEliminationBenchmark.class, name = "nullnessSnippet") |
| public static class Nullness extends GraphState { |
| } |
| |
| @SuppressWarnings("unused") |
| public static int nullnessSnippet(Object a, Object b) { |
| if (a == null) { |
| if (a == b) { |
| if (b == null) { |
| return 1; |
| } else { |
| return -2; |
| } |
| } else { |
| if (b == null) { |
| return -3; |
| } else { |
| return 4; |
| } |
| } |
| } else { |
| if (a == b) { |
| if (b == null) { |
| return -5; |
| } else { |
| return 6; |
| } |
| } else { |
| if (b == null) { |
| return 7; |
| } else { |
| return 8; |
| } |
| } |
| } |
| } |
| |
| @Benchmark |
| @Warmup(iterations = 20) |
| public void nullness(Nullness s, GraalState g) { |
| new DominatorConditionalEliminationPhase(false).apply(s.graph, new PhaseContext(g.providers)); |
| } |
| |
| @MethodSpec(declaringClass = ConditionalEliminationBenchmark.class, name = "searchSnippet") |
| public static class Search extends GraphState { |
| } |
| |
| static class Entry { |
| final String name; |
| |
| Entry(String name) { |
| this.name = name; |
| } |
| } |
| |
| static class EntryWithNext extends Entry { |
| EntryWithNext(String name, Entry next) { |
| super(name); |
| this.next = next; |
| } |
| |
| final Entry next; |
| } |
| |
| public static Entry searchSnippet(Entry start, String name, Entry alternative) { |
| Entry current = start; |
| do { |
| while (current instanceof EntryWithNext) { |
| if (name != null && current.name == name) { |
| current = null; |
| } else { |
| Entry next = ((EntryWithNext) current).next; |
| current = next; |
| } |
| } |
| |
| if (current != null) { |
| if (current.name.equals(name)) { |
| return current; |
| } |
| } |
| if (current == alternative) { |
| return null; |
| } |
| current = alternative; |
| |
| } while (true); |
| } |
| |
| @Benchmark |
| public void search(Search s, GraalState g) { |
| new DominatorConditionalEliminationPhase(false).apply(s.graph, new PhaseContext(g.providers)); |
| } |
| } |