CachingPEGraphDecoder.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2015, 2016, 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 */
23package org.graalvm.compiler.replacements;
24
25import static org.graalvm.compiler.core.common.CompilationIdentifier.INVALID_COMPILATION_ID;
26import static org.graalvm.compiler.nodes.graphbuilderconf.IntrinsicContext.CompilationContext.INLINE_AFTER_PARSING;
27
28import java.util.HashMap;
29import java.util.Map;
30
31import org.graalvm.compiler.bytecode.BytecodeProvider;
32import org.graalvm.compiler.debug.Debug;
33import org.graalvm.compiler.java.GraphBuilderPhase;
34import org.graalvm.compiler.nodes.EncodedGraph;
35import org.graalvm.compiler.nodes.GraphEncoder;
36import org.graalvm.compiler.nodes.StructuredGraph;
37import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
38import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
39import org.graalvm.compiler.nodes.graphbuilderconf.IntrinsicContext;
40import org.graalvm.compiler.phases.OptimisticOptimizations;
41import org.graalvm.compiler.phases.common.CanonicalizerPhase;
42import org.graalvm.compiler.phases.common.ConvertDeoptimizeToGuardPhase;
43import org.graalvm.compiler.phases.tiers.PhaseContext;
44import org.graalvm.compiler.phases.util.Providers;
45
46import jdk.vm.ci.code.Architecture;
47import jdk.vm.ci.meta.ResolvedJavaMethod;
48
49/**
50 * A graph decoder that provides all necessary encoded graphs on-the-fly (by parsing the methods and
51 * encoding the graphs).
52 */
53public class CachingPEGraphDecoder extends PEGraphDecoder {
54
55    protected final Providers providers;
56    protected final GraphBuilderConfiguration graphBuilderConfig;
57    protected final OptimisticOptimizations optimisticOpts;
58    private final AllowAssumptions allowAssumptions;
59    private final Map<ResolvedJavaMethod, EncodedGraph> graphCache;
60
61    public CachingPEGraphDecoder(Providers providers, GraphBuilderConfiguration graphBuilderConfig, OptimisticOptimizations optimisticOpts, AllowAssumptions allowAssumptions,
62                    Architecture architecture) {
63        super(providers.getMetaAccess(), providers.getConstantReflection(), providers.getConstantFieldProvider(), providers.getStampProvider(), architecture);
64
65        this.providers = providers;
66        this.graphBuilderConfig = graphBuilderConfig;
67        this.optimisticOpts = optimisticOpts;
68        this.allowAssumptions = allowAssumptions;
69        this.graphCache = new HashMap<>();
70    }
71
72    protected GraphBuilderPhase.Instance createGraphBuilderPhaseInstance(IntrinsicContext initialIntrinsicContext) {
73        return new GraphBuilderPhase.Instance(providers.getMetaAccess(), providers.getStampProvider(), providers.getConstantReflection(), providers.getConstantFieldProvider(), graphBuilderConfig,
74                        optimisticOpts, initialIntrinsicContext);
75    }
76
77    @SuppressWarnings("try")
78    private EncodedGraph createGraph(ResolvedJavaMethod method, BytecodeProvider intrinsicBytecodeProvider) {
79        StructuredGraph graph = new StructuredGraph(method, allowAssumptions, INVALID_COMPILATION_ID);
80        try (Debug.Scope scope = Debug.scope("createGraph", graph)) {
81            IntrinsicContext initialIntrinsicContext = intrinsicBytecodeProvider != null ? new IntrinsicContext(method, method, intrinsicBytecodeProvider, INLINE_AFTER_PARSING) : null;
82            GraphBuilderPhase.Instance graphBuilderPhaseInstance = createGraphBuilderPhaseInstance(initialIntrinsicContext);
83            graphBuilderPhaseInstance.apply(graph);
84
85            PhaseContext context = new PhaseContext(providers);
86            new CanonicalizerPhase().apply(graph, context);
87            /*
88             * ConvertDeoptimizeToGuardPhase reduces the number of merges in the graph, so that
89             * fewer frame states will be created. This significantly reduces the number of nodes in
90             * the initial graph.
91             */
92            new ConvertDeoptimizeToGuardPhase().apply(graph, context);
93
94            EncodedGraph encodedGraph = GraphEncoder.encodeSingleGraph(graph, architecture);
95            graphCache.put(method, encodedGraph);
96            return encodedGraph;
97
98        } catch (Throwable ex) {
99            throw Debug.handle(ex);
100        }
101    }
102
103    @Override
104    protected EncodedGraph lookupEncodedGraph(ResolvedJavaMethod method, BytecodeProvider intrinsicBytecodeProvider) {
105        EncodedGraph result = graphCache.get(method);
106        if (result == null && method.hasBytecodes()) {
107            result = createGraph(method, intrinsicBytecodeProvider);
108        }
109        return result;
110    }
111}
112