1 /* 2 * Copyright (c) 2011, 2019, 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.EscapeAnalyzeOnly; 28 29 import org.graalvm.compiler.nodes.StructuredGraph; 30 import org.graalvm.compiler.nodes.StructuredGraph.ScheduleResult; 31 import org.graalvm.compiler.nodes.cfg.ControlFlowGraph; 32 import org.graalvm.compiler.nodes.spi.CoreProviders; 33 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 34 35 public class EarlyReadEliminationPhase extends EffectsPhase<CoreProviders> { 36 37 private final boolean considerGuards; 38 EarlyReadEliminationPhase(CanonicalizerPhase canonicalizer)39 public EarlyReadEliminationPhase(CanonicalizerPhase canonicalizer) { 40 super(1, canonicalizer, true); 41 this.considerGuards = true; 42 } 43 EarlyReadEliminationPhase(CanonicalizerPhase canonicalizer, boolean considerGuards)44 public EarlyReadEliminationPhase(CanonicalizerPhase canonicalizer, boolean considerGuards) { 45 super(1, canonicalizer, true); 46 this.considerGuards = considerGuards; 47 } 48 49 @Override run(StructuredGraph graph, CoreProviders context)50 protected void run(StructuredGraph graph, CoreProviders context) { 51 if (VirtualUtil.matches(graph, EscapeAnalyzeOnly.getValue(graph.getOptions()))) { 52 runAnalysis(graph, context); 53 } 54 } 55 56 @Override createEffectsClosure(CoreProviders context, ScheduleResult schedule, ControlFlowGraph cfg)57 protected Closure<?> createEffectsClosure(CoreProviders context, ScheduleResult schedule, ControlFlowGraph cfg) { 58 assert schedule == null; 59 return new ReadEliminationClosure(cfg, considerGuards); 60 } 61 62 @Override codeSizeIncrease()63 public float codeSizeIncrease() { 64 return 2f; 65 } 66 } 67