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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.openjdk.bench.vm.compiler;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.*;

import java.util.concurrent.TimeUnit;
import java.util.Random;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 1, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 1, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(value = 1)
public abstract class VectorLoadToStoreForwarding {
    @Param({"80"})
    public int SIZE;

    private int[] aI;

    @Param("0")
    private int seed;
    private Random r = new Random(seed);

    @Setup
    public void init() {
        aI = new int[SIZE];
        
        for (int i = 0; i < SIZE; i++) {
            aI[i] = r.nextInt();
        }
    }

    @Benchmark
    public void benchmark_0() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 0] + 1;
        }
    }

    @Benchmark
    public void benchmark_1() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 1] + 1;
        }
    }

    @Benchmark
    public void benchmark_2() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 2] + 1;
        }
    }

    @Benchmark
    public void benchmark_3() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 3] + 1;
        }
    }

    @Benchmark
    public void benchmark_4() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 4] + 1;
        }
    }

    @Benchmark
    public void benchmark_5() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 5] + 1;
        }
    }

    @Benchmark
    public void benchmark_6() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 6] + 1;
        }
    }

    @Benchmark
    public void benchmark_7() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 7] + 1;
        }
    }

    @Benchmark
    public void benchmark_8() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 8] + 1;
        }
    }

    @Benchmark
    public void benchmark_9() {
        for (int i = 10; i < SIZE; i++) {
            aI[i] = aI[i - 9] + 1;
        }
    }

    @Fork(value = 1, jvmArgsPrepend = {
        "-XX:+UseSuperWord"
    })
    public static class VectorLoadToStoreForwardingSuperWord extends VectorLoadToStoreForwarding {}

    @Fork(value = 1, jvmArgsPrepend = {
        "-XX:-UseSuperWord"
    })
    public static class VectorLoadToStoreForwardingNoSuperWord extends VectorLoadToStoreForwarding {}
}