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