1 /*
   2  * Copyright (c) 2013, 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 
  24 
  25 package org.graalvm.compiler.core.phases;
  26 
  27 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
  28 import static org.graalvm.compiler.phases.common.DeadCodeEliminationPhase.Optionality.Required;
  29 
  30 import org.graalvm.compiler.core.common.GraalOptions;
  31 import org.graalvm.compiler.nodes.spi.LoweringTool;
  32 import org.graalvm.compiler.options.Option;
  33 import org.graalvm.compiler.options.OptionKey;
  34 import org.graalvm.compiler.options.OptionType;
  35 import org.graalvm.compiler.options.OptionValues;
  36 import org.graalvm.compiler.phases.PhaseSuite;
  37 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  38 import org.graalvm.compiler.phases.common.DeadCodeEliminationPhase;
  39 import org.graalvm.compiler.phases.common.ExpandLogicPhase;
  40 import org.graalvm.compiler.phases.common.FixReadsPhase;
  41 import org.graalvm.compiler.phases.common.LoweringPhase;
  42 import org.graalvm.compiler.phases.common.ProfileCompiledMethodsPhase;
  43 import org.graalvm.compiler.phases.common.PropagateDeoptimizeProbabilityPhase;
  44 import org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase;
  45 import org.graalvm.compiler.phases.schedule.SchedulePhase;
  46 import org.graalvm.compiler.phases.schedule.SchedulePhase.SchedulingStrategy;
  47 import org.graalvm.compiler.phases.tiers.LowTierContext;
  48 
  49 public class LowTier extends PhaseSuite<LowTierContext> {
  50 
  51     static class Options {
  52 
  53         // @formatter:off
  54         @Option(help = "", type = OptionType.Debug)
  55         public static final OptionKey<Boolean> ProfileCompiledMethods = new OptionKey<>(false);
  56         // @formatter:on
  57 
  58     }
  59 
  60     public LowTier(OptionValues options) {
  61         CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
  62         CanonicalizerPhase canonicalizerWithoutGVN = new CanonicalizerPhase();
  63         canonicalizerWithoutGVN.disableGVN();
  64         if (ImmutableCode.getValue(options)) {
  65             canonicalizer.disableReadCanonicalization();
  66             canonicalizerWithoutGVN.disableReadCanonicalization();
  67         }
  68 
  69         if (Options.ProfileCompiledMethods.getValue(options)) {
  70             appendPhase(new ProfileCompiledMethodsPhase());
  71         }
  72 
  73         appendPhase(new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.LOW_TIER));
  74 
  75         appendPhase(new ExpandLogicPhase());
  76 
  77         appendPhase(new FixReadsPhase(true, new SchedulePhase(GraalOptions.StressTestEarlyReads.getValue(options) ? SchedulingStrategy.EARLIEST : SchedulingStrategy.LATEST_OUT_OF_LOOPS)));
  78 
  79         appendPhase(canonicalizerWithoutGVN);
  80 
  81         appendPhase(new UseTrappingNullChecksPhase());
  82 
  83         appendPhase(new DeadCodeEliminationPhase(Required));
  84 
  85         appendPhase(new PropagateDeoptimizeProbabilityPhase());
  86 
  87         appendPhase(new SchedulePhase(SchedulePhase.SchedulingStrategy.FINAL_SCHEDULE));
  88     }
  89 }