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 * 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.core.test;

import org.junit.Test;

import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.java.NewArrayNode;

public class ArrayCopyVirtualizationTest extends GraalCompilerTest {

    @Override
    protected void checkMidTierGraph(StructuredGraph graph) {
        assertTrue(graph.getNodes().filter(node -> node instanceof NewArrayNode).count() == 0, "shouldn't require allocation in %s", graph);
        super.checkMidTierGraph(graph);
    }

    public byte byteCopyVirtualization() {
        byte[] array = new byte[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public short shortCopyVirtualization() {
        short[] array = new short[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 2);
        return array[0];
    }

    public char charCopyVirtualization() {
        char[] array = new char[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public int intCopyVirtualization() {
        int[] array = new int[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public long longCopyVirtualization() {
        long[] array = new long[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public float floatCopyVirtualization() {
        float[] array = new float[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public double doubleCopyVirtualization() {
        double[] array = new double[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    public Object objectCopyVirtualization() {
        Object[] array = new Object[]{1, 2, 3, 4};
        System.arraycopy(array, 1, array, 0, 3);
        return array[0];
    }

    @Test
    public void testCopyVirtualization() {
        test("byteCopyVirtualization");
        test("shortCopyVirtualization");
        test("charCopyVirtualization");
        test("intCopyVirtualization");
        test("longCopyVirtualization");
        test("floatCopyVirtualization");
        test("doubleCopyVirtualization");
        test("objectCopyVirtualization");
    }

    public byte byteCopyBackwardsVirtualization() {
        byte[] array = new byte[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public short shortCopyBackwardsVirtualization() {
        short[] array = new short[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public char charCopyBackwardsVirtualization() {
        char[] array = new char[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public int intCopyBackwardsVirtualization() {
        int[] array = new int[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public long longCopyBackwardsVirtualization() {
        long[] array = new long[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public float floatCopyBackwardsVirtualization() {
        float[] array = new float[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public double doubleCopyBackwardsVirtualization() {
        double[] array = new double[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    public Object objectCopyBackwardsVirtualization() {
        Object[] array = new Object[]{1, 2, 3, 4};
        System.arraycopy(array, 0, array, 1, 3);
        return array[3];
    }

    @Test
    public void testCopyBackwardsVirtualization() {
        test("byteCopyBackwardsVirtualization");
        test("shortCopyBackwardsVirtualization");
        test("charCopyBackwardsVirtualization");
        test("intCopyBackwardsVirtualization");
        test("longCopyBackwardsVirtualization");
        test("floatCopyBackwardsVirtualization");
        test("doubleCopyBackwardsVirtualization");
        test("objectCopyBackwardsVirtualization");
    }
}