001/*
002 * Copyright (c) 2011, 2014, 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.nodes.spi;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.nodes.*;
028import com.oracle.graal.nodes.extended.*;
029
030public interface LoweringTool {
031
032    MetaAccessProvider getMetaAccess();
033
034    LoweringProvider getLowerer();
035
036    ConstantReflectionProvider getConstantReflection();
037
038    Replacements getReplacements();
039
040    StampProvider getStampProvider();
041
042    GuardingNode createGuard(FixedNode before, LogicNode condition, DeoptimizationReason deoptReason, DeoptimizationAction action);
043
044    GuardingNode createGuard(FixedNode before, LogicNode condition, DeoptimizationReason deoptReason, DeoptimizationAction action, JavaConstant speculation, boolean negated);
045
046    /**
047     * Gets the closest fixed node preceding the node currently being lowered.
048     */
049    FixedWithNextNode lastFixedNode();
050
051    AnchoringNode getCurrentGuardAnchor();
052
053    /**
054     * Marker interface lowering stages.
055     */
056    interface LoweringStage {
057    }
058
059    /**
060     * The lowering stages used in a standard Graal phase plan. Lowering is called 3 times, during
061     * every tier of compilation.
062     */
063    enum StandardLoweringStage implements LoweringStage {
064        HIGH_TIER,
065        MID_TIER,
066        LOW_TIER
067    }
068
069    /**
070     * Returns current lowering stage.
071     */
072    LoweringStage getLoweringStage();
073}