001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.compiler.phases;
024
025import static com.oracle.graal.compiler.common.GraalOptions.*;
026import static com.oracle.graal.phases.common.DeadCodeEliminationPhase.Optionality.*;
027import jdk.internal.jvmci.options.*;
028
029import com.oracle.graal.nodes.spi.*;
030import com.oracle.graal.phases.*;
031import com.oracle.graal.phases.common.*;
032import com.oracle.graal.phases.tiers.*;
033
034public class LowTier extends PhaseSuite<LowTierContext> {
035
036    static class Options {
037
038        // @formatter:off
039        @Option(help = "", type = OptionType.Debug)
040        public static final OptionValue<Boolean> ProfileCompiledMethods = new OptionValue<>(false);
041        // @formatter:on
042
043    }
044
045    public LowTier() {
046        CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
047        if (ImmutableCode.getValue()) {
048            canonicalizer.disableReadCanonicalization();
049        }
050
051        if (Options.ProfileCompiledMethods.getValue()) {
052            appendPhase(new ProfileCompiledMethodsPhase());
053        }
054
055        appendPhase(new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.LOW_TIER));
056
057        appendPhase(new RemoveValueProxyPhase());
058
059        appendPhase(new ExpandLogicPhase());
060
061        /* Cleanup IsNull checks resulting from MID_TIER/LOW_TIER lowering and ExpandLogic phase. */
062        if (ConditionalElimination.getValue() && OptCanonicalizer.getValue()) {
063            appendPhase(new IterativeConditionalEliminationPhase(canonicalizer, false));
064            /* Canonicalizer may create some new ShortCircuitOrNodes so clean them up. */
065            appendPhase(new ExpandLogicPhase());
066        }
067
068        appendPhase(new UseTrappingNullChecksPhase());
069
070        appendPhase(new DeadCodeEliminationPhase(Required));
071    }
072}