/*

 * Copyright (c) 2012, 2014, 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;

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

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.graph.spi.Canonicalizable;

import org.graalvm.compiler.graph.spi.CanonicalizerTool;

import org.graalvm.compiler.nodeinfo.InputType;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.extended.GuardingNode;

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

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

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

@NodeInfo(allowedUsageTypes = {InputType.Guard}, nameTemplate = "Proxy({i#value})")

public final class GuardProxyNode extends ProxyNode implements GuardingNode, Proxy, LIRLowerable, Canonicalizable {

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

    @OptionalInput(InputType.Guard) GuardingNode value;

    public GuardProxyNode(GuardingNode value, LoopExitNode proxyPoint) {

        super(TYPE, StampFactory.forVoid(), proxyPoint);

        this.value = value;

    }

    @Override

    public void generate(NodeLIRBuilderTool generator) {

    }

    public void setValue(GuardingNode newValue) {

        this.updateUsages(value.asNode(), newValue.asNode());

        this.value = newValue;

    }

    @Override

    public ValueNode value() {

        return (value == null ? null : value.asNode());

    }

    @Override

    public Node getOriginalNode() {

        return (value == null ? null : value.asNode());

    }

    @Override

    public Node canonical(CanonicalizerTool tool) {

        if (value == null) {

            return null;

        }

        return this;

    }

}