1 /* 2 * Copyright (c) 2011, 2018, 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 */ 23 24 25 package org.graalvm.compiler.virtual.phases.ea; 26 27 import static org.graalvm.compiler.core.common.GraalOptions.EscapeAnalysisIterations; 28 import static org.graalvm.compiler.core.common.GraalOptions.EscapeAnalyzeOnly; 29 30 import jdk.internal.vm.compiler.collections.EconomicSet; 31 import org.graalvm.compiler.graph.Node; 32 import org.graalvm.compiler.nodes.StructuredGraph; 33 import org.graalvm.compiler.nodes.StructuredGraph.ScheduleResult; 34 import org.graalvm.compiler.nodes.cfg.ControlFlowGraph; 35 import org.graalvm.compiler.nodes.spi.CoreProviders; 36 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 37 import org.graalvm.compiler.options.Option; 38 import org.graalvm.compiler.options.OptionKey; 39 import org.graalvm.compiler.options.OptionType; 40 import org.graalvm.compiler.options.OptionValues; 41 import org.graalvm.compiler.phases.BasePhase; 42 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 43 44 public class PartialEscapePhase extends EffectsPhase<CoreProviders> { 45 46 static class Options { 47 //@formatter:off 48 @Option(help = "", type = OptionType.Debug) 49 public static final OptionKey<Boolean> OptEarlyReadElimination = new OptionKey<>(true); 50 //@formatter:on 51 } 52 53 private final boolean readElimination; 54 private final BasePhase<CoreProviders> cleanupPhase; 55 56 public PartialEscapePhase(boolean iterative, CanonicalizerPhase canonicalizer, OptionValues options) { 57 this(iterative, Options.OptEarlyReadElimination.getValue(options), canonicalizer, null, options); 58 } 59 60 public PartialEscapePhase(boolean iterative, CanonicalizerPhase canonicalizer, BasePhase<CoreProviders> cleanupPhase, OptionValues options) { 61 this(iterative, Options.OptEarlyReadElimination.getValue(options), canonicalizer, cleanupPhase, options); 62 } 63 64 public PartialEscapePhase(boolean iterative, boolean readElimination, CanonicalizerPhase canonicalizer, BasePhase<CoreProviders> cleanupPhase, OptionValues options) { 65 super(iterative ? EscapeAnalysisIterations.getValue(options) : 1, canonicalizer); 66 this.readElimination = readElimination; 67 this.cleanupPhase = cleanupPhase; 68 } 69 70 @Override 71 protected void postIteration(StructuredGraph graph, CoreProviders context, EconomicSet<Node> changedNodes) { 72 super.postIteration(graph, context, changedNodes); 73 if (cleanupPhase != null) { 74 cleanupPhase.apply(graph, context); 75 } 76 } 77 78 @Override 79 protected void run(StructuredGraph graph, CoreProviders context) { 80 if (VirtualUtil.matches(graph, EscapeAnalyzeOnly.getValue(graph.getOptions()))) { 81 if (readElimination || graph.hasVirtualizableAllocation()) { 82 runAnalysis(graph, context); 83 } 84 } 85 } 86 87 @Override 88 protected Closure<?> createEffectsClosure(CoreProviders context, ScheduleResult schedule, ControlFlowGraph cfg) { 89 for (VirtualObjectNode virtual : cfg.graph.getNodes(VirtualObjectNode.TYPE)) { 90 virtual.resetObjectId(); 91 } 92 assert schedule != null; 93 if (readElimination) { 94 return new PEReadEliminationClosure(schedule, context.getMetaAccess(), context.getConstantReflection(), context.getConstantFieldProvider(), context.getLowerer()); 95 } else { 96 return new PartialEscapeClosure.Final(schedule, context.getMetaAccess(), context.getConstantReflection(), context.getConstantFieldProvider(), context.getLowerer()); 97 } 98 } 99 100 @Override 101 public boolean checkContract() { 102 return false; 103 } 104 105 }