| /* |
| * Copyright (c) 2016, 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.hotspot.nodes.profiling; |
| |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.graph.iterators.NodeIterable; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.options.Option; |
| import org.graalvm.compiler.options.OptionType; |
| import org.graalvm.compiler.options.OptionValue; |
| |
| @NodeInfo |
| public class ProfileNode extends DeoptimizingFixedWithNextNode implements Lowerable { |
| public static class Options { |
| @Option(help = "Control probabilistic profiling on AMD64", type = OptionType.Expert)// |
| public static final OptionValue<Boolean> ProbabilisticProfiling = new OptionValue<>(true); |
| } |
| |
| public static final NodeClass<ProfileNode> TYPE = NodeClass.create(ProfileNode.class); |
| |
| protected ResolvedJavaMethod method; |
| |
| // Only used if ProbabilisticProfiling == true and may be ignored by lowerer. |
| @OptionalInput protected ValueNode random; |
| |
| // logarithm base 2 of the profile probability |
| protected int probabilityLog; |
| |
| protected ProfileNode(NodeClass<? extends DeoptimizingFixedWithNextNode> c, ResolvedJavaMethod method, int probabilityLog) { |
| super(c, StampFactory.forVoid()); |
| this.method = method; |
| this.probabilityLog = probabilityLog; |
| } |
| |
| public ProfileNode(ResolvedJavaMethod method, int probabilityLog) { |
| super(TYPE, StampFactory.forVoid()); |
| this.method = method; |
| this.probabilityLog = probabilityLog; |
| } |
| |
| @Override |
| public boolean canDeoptimize() { |
| return true; |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| tool.getLowerer().lower(this, tool); |
| } |
| |
| public ResolvedJavaMethod getProfiledMethod() { |
| return method; |
| } |
| |
| public ValueNode getRandom() { |
| return random; |
| } |
| |
| public void setRandom(ValueNode r) { |
| updateUsages(random, r); |
| this.random = r; |
| } |
| |
| /** |
| * Get the logarithm base 2 of the profile probability. |
| */ |
| public int getProbabilityLog() { |
| return probabilityLog; |
| } |
| |
| /** |
| * Gathers all the {@link ProfileNode}s that are inputs to the |
| * {@linkplain StructuredGraph#getNodes() live nodes} in a given graph. |
| */ |
| public static NodeIterable<ProfileNode> getProfileNodes(StructuredGraph graph) { |
| return graph.getNodes().filter(ProfileNode.class); |
| } |
| } |