/*

 * 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.phases.common;

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.memory.address.AddressNode;

import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;

import org.graalvm.compiler.nodes.memory.address.RawAddressNode;

import org.graalvm.compiler.nodes.util.GraphUtil;

import org.graalvm.compiler.phases.Phase;

public class AddressLoweringPhase extends Phase {

    public abstract static class AddressLowering {

        public abstract AddressNode lower(ValueNode address);

        public abstract AddressNode lower(ValueNode base, ValueNode offset);

    }

    private final AddressLowering lowering;

    public AddressLoweringPhase(AddressLowering lowering) {

        this.lowering = lowering;

        assert lowering != null;

    }

    @Override

    protected void run(StructuredGraph graph) {

        for (Node node : graph.getNodes()) {

            AddressNode lowered;

            if (node instanceof RawAddressNode) {

                RawAddressNode address = (RawAddressNode) node;

                lowered = lowering.lower(address.getAddress());

            } else if (node instanceof OffsetAddressNode) {

                OffsetAddressNode address = (OffsetAddressNode) node;

                lowered = lowering.lower(address.getBase(), address.getOffset());

            } else {

                continue;

            }

            node.replaceAtUsages(lowered);

            GraphUtil.killWithUnusedFloatingInputs(node);

        }

    }

}