/*

 * Copyright (c) 2015, 2018, 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.hotspot.amd64;

import org.graalvm.compiler.core.amd64.AMD64MoveFactory;

import org.graalvm.compiler.lir.LIRInstruction;

import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;

import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant;

import jdk.vm.ci.hotspot.HotSpotConstant;

import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;

import jdk.vm.ci.hotspot.HotSpotObjectConstant;

import jdk.vm.ci.meta.AllocatableValue;

import jdk.vm.ci.meta.Constant;

import jdk.vm.ci.meta.JavaConstant;

public class AMD64HotSpotMoveFactory extends AMD64MoveFactory {

    public AMD64HotSpotMoveFactory(BackupSlotProvider backupSlotProvider) {

        super(backupSlotProvider);

    }

    @Override

    public boolean canInlineConstant(Constant c) {

        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) {

            return true;

        } else if (c instanceof HotSpotObjectConstant) {

            return ((HotSpotObjectConstant) c).isCompressed();

        } else if (c instanceof HotSpotMetaspaceConstant) {

            return ((HotSpotMetaspaceConstant) c).isCompressed();

        } else {

            return super.canInlineConstant(c);

        }

    }

    @Override

    public boolean allowConstantToStackMove(Constant value) {

        if (value instanceof HotSpotConstant) {

            return ((HotSpotConstant) value).isCompressed();

        }

        return super.allowConstantToStackMove(value);

    }

    @Override

    public AMD64LIRInstruction createLoad(AllocatableValue dst, Constant src) {

        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(src)) {

            return super.createLoad(dst, JavaConstant.INT_0);

        } else if (src instanceof HotSpotObjectConstant) {

            return new AMD64HotSpotMove.HotSpotLoadObjectConstantOp(dst, (HotSpotObjectConstant) src);

        } else if (src instanceof HotSpotMetaspaceConstant) {

            return new AMD64HotSpotMove.HotSpotLoadMetaspaceConstantOp(dst, (HotSpotMetaspaceConstant) src);

        } else {

            return super.createLoad(dst, src);

        }

    }

    @Override

    public LIRInstruction createStackLoad(AllocatableValue dst, Constant src) {

        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(src)) {

            return super.createStackLoad(dst, JavaConstant.INT_0);

        } else if (src instanceof HotSpotObjectConstant) {

            assert ((HotSpotConstant) src).isCompressed();

            return new AMD64HotSpotMove.HotSpotLoadObjectConstantOp(dst, (HotSpotObjectConstant) src);

        } else if (src instanceof HotSpotMetaspaceConstant) {

            assert ((HotSpotConstant) src).isCompressed();

            return new AMD64HotSpotMove.HotSpotLoadMetaspaceConstantOp(dst, (HotSpotMetaspaceConstant) src);

        } else {

            return super.createStackLoad(dst, src);

        }

    }

}