/*

 * Copyright (c) 2009, 2011, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.graalvm.compiler.nodes.java;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;

import org.graalvm.compiler.core.common.type.Stamp;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodeinfo.NodeSize;

import org.graalvm.compiler.nodeinfo.Verbosity;

import org.graalvm.compiler.nodes.FixedWithNextNode;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.spi.Lowerable;

import org.graalvm.compiler.nodes.spi.LoweringTool;

import jdk.vm.ci.meta.ResolvedJavaField;

/**

 * The base class of all instructions that access fields.

 */

@NodeInfo(cycles = CYCLES_2, size = SIZE_1)

public abstract class AccessFieldNode extends FixedWithNextNode implements Lowerable {

    public static final NodeClass<AccessFieldNode> TYPE = NodeClass.create(AccessFieldNode.class);

    @OptionalInput ValueNode object;

    protected final ResolvedJavaField field;

    public ValueNode object() {

        return object;

    }

    /**

     * Constructs a new access field object.

     *

     * @param object the instruction producing the receiver object

     * @param field the compiler interface representation of the field

     */

        super(c, stamp);

        this.object = object;

        this.field = field;

    }

    /**

     * Gets the compiler interface field for this field access.

     *

     * @return the compiler interface field for this field access

     */

    public ResolvedJavaField field() {

        return field;

    }

    /**

     * Checks whether this field access is an access to a static field.

     *

     * @return {@code true} if this field access is to a static field

     */

    public boolean isStatic() {

        return field.isStatic();

    }

    /**

     *

     */

    public boolean isVolatile() {

    }

    @Override

    public void lower(LoweringTool tool) {

        tool.getLowerer().lower(this, tool);

    }

    @Override

    public String toString(Verbosity verbosity) {

        if (verbosity == Verbosity.Name) {

            return super.toString(verbosity) + "#" + field.getName();

        } else {

            return super.toString(verbosity);

        }

    }

    @Override

    public boolean verify() {

        assertTrue((object == null) == isStatic(), "static field must not have object, instance field must have object");

        return super.verify();

    }

    @Override

    public NodeSize estimatedNodeSize() {

            return SIZE_2;

        }

        return super.estimatedNodeSize();

    }

}