AddressNode.java

/*
 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package org.graalvm.compiler.nodes.memory.address;

import static org.graalvm.compiler.nodeinfo.InputType.Association;
import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;

import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.Node.IndirectCanonicalization;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodeinfo.StructuralInput;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.calc.FloatingNode;

/**
 * Base class for nodes that deal with addressing calculation.
 */
@NodeInfo(allowedUsageTypes = Association, size = SIZE_0, cycles = CYCLES_0)
public abstract class AddressNode extends FloatingNode implements IndirectCanonicalization {
    public static final NodeClass<AddressNode> TYPE = NodeClass.create(AddressNode.class);

    protected AddressNode(NodeClass<? extends AddressNode> c) {
        super(c, StampFactory.pointer());
    }

    public abstract static class Address extends StructuralInput.Association {
    }

    public abstract ValueNode getBase();

    public abstract ValueNode getIndex();

    /**
     * Constant that is the maximum displacement from the base and index for this address. This
     * value is used to determine whether using the access as an implicit null check on the base is
     * valid.
     *
     * @return the maximum distance in bytes from the base that this address can be
     */
    public abstract long getMaxConstantDisplacement();
}