Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/SnippetStub.java @ 20885:c4691265275a
made ReplacementContext and IntrinsicContext top level classes
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 10 Apr 2015 13:21:33 +0200 |
parents | aaf5039e56d7 |
children | 3b5ec1a2b3b5 |
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/* * Copyright (c) 2012, 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.hotspot.stubs; import java.lang.reflect.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.debug.*; import com.oracle.graal.debug.Debug.Scope; import com.oracle.graal.graphbuilderconf.*; import com.oracle.graal.graphbuilderconf.GraphBuilderConfiguration.Plugins; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.java.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.StructuredGraph.AllowAssumptions; import com.oracle.graal.nodes.StructuredGraph.GuardsStage; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.phases.tiers.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.Snippet.ConstantParameter; /** * Base class for a stub defined by a snippet. */ public abstract class SnippetStub extends Stub implements Snippets { protected final ResolvedJavaMethod method; /** * Creates a new snippet stub. * * @param snippetMethodName name of the single {@link Snippet} annotated method in the class of * this object * @param linkage linkage details for a call to the stub */ public SnippetStub(String snippetMethodName, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) { this(null, snippetMethodName, providers, linkage); } /** * Creates a new snippet stub. * * @param snippetDeclaringClass this class in which the {@link Snippet} annotated method is * declared. If {@code null}, this the class of this object is used. * @param snippetMethodName name of the single {@link Snippet} annotated method in * {@code snippetDeclaringClass} * @param linkage linkage details for a call to the stub */ public SnippetStub(Class<? extends Snippets> snippetDeclaringClass, String snippetMethodName, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) { super(providers, linkage); Method javaMethod = SnippetTemplate.AbstractTemplates.findMethod(snippetDeclaringClass == null ? getClass() : snippetDeclaringClass, snippetMethodName, null); this.method = providers.getMetaAccess().lookupJavaMethod(javaMethod); } public static final ThreadLocal<StructuredGraph> SnippetGraphUnderConstruction = new ThreadLocal<>(); @Override protected StructuredGraph getGraph() { Plugins defaultPlugins = providers.getGraphBuilderPlugins(); MetaAccessProvider metaAccess = providers.getMetaAccess(); Plugins plugins = new Plugins(defaultPlugins); plugins.setParameterPlugin(new ConstantBindingParameterPlugin(makeConstArgs(), plugins.getParameterPlugin(), metaAccess, providers.getSnippetReflection())); GraphBuilderConfiguration config = GraphBuilderConfiguration.getSnippetDefault(plugins); // Stubs cannot have optimistic assumptions since they have // to be valid for the entire run of the VM. Nor can they be // evolved or have breakpoints. final StructuredGraph graph = new StructuredGraph(method, AllowAssumptions.NO); graph.disableInlinedMethodRecording(); assert SnippetGraphUnderConstruction.get() == null; SnippetGraphUnderConstruction.set(graph); ReplacementContext initialReplacementContext = new ReplacementContext(method, method); new GraphBuilderPhase.Instance(metaAccess, providers.getStampProvider(), providers.getConstantReflection(), config, OptimisticOptimizations.NONE, initialReplacementContext).apply(graph); SnippetGraphUnderConstruction.set(null); graph.setGuardsStage(GuardsStage.FLOATING_GUARDS); try (Scope s = Debug.scope("LoweringStub", graph)) { new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, new PhaseContext(providers)); } catch (Throwable e) { throw Debug.handle(e); } return graph; } protected boolean checkConstArg(int index, String expectedName) { assert method.getParameterAnnotation(ConstantParameter.class, index) != null : String.format("parameter %d of %s is expected to be constant", index, method.format("%H.%n(%p)")); LocalVariableTable lvt = method.getLocalVariableTable(); if (lvt != null) { Local local = lvt.getLocal(index, 0); assert local != null; String actualName = local.getName(); assert actualName.equals(expectedName) : String.format("parameter %d of %s is expected to be named %s, not %s", index, method.format("%H.%n(%p)"), expectedName, actualName); } return true; } protected Object[] makeConstArgs() { int count = method.getSignature().getParameterCount(false); Object[] args = new Object[count]; for (int i = 0; i < args.length; i++) { if (method.getParameterAnnotation(ConstantParameter.class, i) != null) { args[i] = getConstantParameterValue(i, null); } } return args; } protected Object getConstantParameterValue(int index, String name) { throw new GraalInternalError("%s must override getConstantParameterValue() to provide a value for parameter %d%s", getClass().getName(), index, name == null ? "" : " (" + name + ")"); } @Override protected Object debugScopeContext() { return getInstalledCodeOwner(); } @Override public ResolvedJavaMethod getInstalledCodeOwner() { return method; } @Override public String toString() { return "Stub<" + getInstalledCodeOwner().format("%h.%n") + ">"; } }