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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.hotspot.test;

import java.lang.reflect.Array;

import java.util.ArrayList;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.core.test.GraalCompilerTest;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.Parameterized;

import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)

public class ArrayNewInstanceTest extends GraalCompilerTest {

    @Parameters(name = "{index}: class {0} length {1}")

    public static Iterable<Object[]> data() {

        ArrayList<Object[]> parameters = new ArrayList<>();

        Class<?>[] classesToTest = new Class<?>[]{

                        byte.class,

                        boolean.class,

                        short.class,

                        char.class,

                        int.class,

                        long.class,

                        Void.class,

                        ArrayNewInstanceTest.class

        };

        for (Class<?> clazz : classesToTest) {

            // Negative sizes always deopt

            parameters.add(new Object[]{clazz, -1, true});

            parameters.add(new Object[]{clazz, 0, false});

            parameters.add(new Object[]{clazz, 42, false});

        }

        // The void type always throws an exception where graal deopts

        parameters.add(new Object[]{void.class, -1, true});

        parameters.add(new Object[]{void.class, 0, true});

        parameters.add(new Object[]{void.class, 42, true});

        return parameters;

    }

    private final Class<?> type;

    private final int length;

    private final boolean shouldDeopt;

    private final DeoptimizationBox box = new DeoptimizationBox();

    public ArrayNewInstanceTest(Class<?> type, int length, boolean shouldDeopt) {

        super();

        this.type = type;

        this.length = length;

        this.shouldDeopt = shouldDeopt;

    }

    public static Object newArray(Class<?> klass, int length, DeoptimizationBox box) {

        Object result = Array.newInstance(klass, length);

        box.inCompiledCode = GraalDirectives.inCompiledCode();

        return result;

    }

    @Test

    public void testNewArray() {

        test("newArray", type, length, box);

        assertTrue(box.inCompiledCode != shouldDeopt);

    }

    public static Object newArrayInLoop(Class<?> klass, int length, int iterations, DeoptimizationBox box) {

        Object o = null;

        for (int i = 0; i < iterations; i++) {

            o = Array.newInstance(klass, length);

        }

        box.inCompiledCode = GraalDirectives.inCompiledCode();

        return o;

    }

    @Test

    public void testNewArrayInLoop() {

        test("newArrayInLoop", type, length, 2, box);

        assertTrue(box.inCompiledCode != shouldDeopt);

    }

    private static class DeoptimizationBox {

        volatile boolean inCompiledCode = false;

    }

}