src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotMoveFactory.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 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.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);
        }
    }
}