Mercurial > hg > truffle
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/SnippetCounterNode.java @ 21925:64475dbf6aec
Move instantiation checks from methods substitutions to the lowering of DynamicNewInstanceNode and DynamicNewArrayNode, so that Unsafe.allocateInstance and Array.newInstance can be intrinsified to a single node.
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Wed, 10 Jun 2015 17:23:19 -0700 |
parents | 48c1ebd24120 |
children |
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/* * Copyright (c) 2013, 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 com.oracle.graal.replacements; import static com.oracle.graal.compiler.common.GraalOptions.*; import static com.oracle.graal.replacements.SnippetTemplate.*; import static com.oracle.jvmci.common.UnsafeAccess.*; import java.util.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.phases.util.*; import com.oracle.graal.replacements.Snippet.ConstantParameter; import com.oracle.graal.replacements.SnippetTemplate.AbstractTemplates; import com.oracle.graal.replacements.SnippetTemplate.Arguments; import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo; import com.oracle.graal.word.*; import com.oracle.jvmci.code.*; import com.oracle.jvmci.common.*; import com.oracle.jvmci.meta.*; /** * This node can be used to add a counter to the code that will estimate the dynamic number of calls * by adding an increment to the compiled code. This should of course only be used for * debugging/testing purposes. * * A unique counter will be created for each unique name passed to the constructor. Depending on the * value of withContext, the name of the root method is added to the counter's name. */ @NodeInfo public class SnippetCounterNode extends FixedWithNextNode implements Lowerable { public static final NodeClass<SnippetCounterNode> TYPE = NodeClass.create(SnippetCounterNode.class); @Input protected ValueNode increment; protected final SnippetCounter counter; public SnippetCounterNode(SnippetCounter counter, ValueNode increment) { super(TYPE, StampFactory.forVoid()); this.counter = counter; this.increment = increment; } public SnippetCounter getCounter() { return counter; } public ValueNode getIncrement() { return increment; } @NodeIntrinsic public static native void add(@ConstantNodeParameter SnippetCounter counter, int increment); public static void increment(@ConstantNodeParameter SnippetCounter counter) { add(counter, 1); } public void lower(LoweringTool tool) { if (graph().getGuardsStage().areFrameStatesAtDeopts()) { SnippetCounterSnippets.Templates templates = tool.getReplacements().getSnippetTemplateCache(SnippetCounterSnippets.Templates.class); templates.lower(this, tool); } } /** * When {@link #SnippetCounters} are enabled make sure {@link #SNIPPET_COUNTER_LOCATION} is part * of the private locations. * * @param privateLocations * @return a copy of privateLocations with any needed locations added */ public static LocationIdentity[] addSnippetCounters(LocationIdentity[] privateLocations) { if (SnippetCounters.getValue()) { for (LocationIdentity location : privateLocations) { if (location.equals(SNIPPET_COUNTER_LOCATION)) { return privateLocations; } } LocationIdentity[] result = Arrays.copyOf(privateLocations, privateLocations.length + 1); result[result.length - 1] = SnippetCounterNode.SNIPPET_COUNTER_LOCATION; return result; } return privateLocations; } /** * We do not want to use the {@link LocationIdentity} of the {@link SnippetCounter#value} field, * so that the usage in snippets is always possible. If a method accesses the counter via the * field and the snippet, the result might not be correct though. */ public static final LocationIdentity SNIPPET_COUNTER_LOCATION = NamedLocationIdentity.mutable("SnippetCounter"); static class SnippetCounterSnippets implements Snippets { @Fold private static int countOffset() { try { return (int) unsafe.objectFieldOffset(SnippetCounter.class.getDeclaredField("value")); } catch (Exception e) { throw new JVMCIError(e); } } @Snippet public static void add(@ConstantParameter SnippetCounter counter, int increment) { long loadedValue = ObjectAccess.readLong(counter, countOffset(), SNIPPET_COUNTER_LOCATION); ObjectAccess.writeLong(counter, countOffset(), loadedValue + increment, SNIPPET_COUNTER_LOCATION); } public static class Templates extends AbstractTemplates { private final SnippetInfo add = snippet(SnippetCounterSnippets.class, "add", SNIPPET_COUNTER_LOCATION); public Templates(Providers providers, SnippetReflectionProvider snippetReflection, TargetDescription target) { super(providers, snippetReflection, target); } public void lower(SnippetCounterNode counter, LoweringTool tool) { StructuredGraph graph = counter.graph(); Arguments args = new Arguments(add, graph.getGuardsStage(), tool.getLoweringStage()); args.addConst("counter", counter.getCounter()); args.add("increment", counter.getIncrement()); template(args).instantiate(providers.getMetaAccess(), counter, DEFAULT_REPLACER, args); } } } }