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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 *
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package org.openjdk.bench.valhalla.callconv;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OperationsPerInvocation;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;

import java.util.Arrays;
import java.util.concurrent.TimeUnit;

@Fork(3)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
@State(Scope.Thread)
public class Primitive2 {

    public static final int SIZE = 96;  // must be divisible by 2 and 3 and around 100

    public abstract static class InvocationLogic {
        public abstract int compute(int v1, int v2);
    }

    public static class InvokeImpl1 extends InvocationLogic {
        @Override
        public int compute(int v1, int v2) {
            return v1;
        }
    }

    public static class InvokeImpl2 extends InvocationLogic {
        @Override
        public int compute(int v1, int v2) {
            return v1;
        }
    }

    public static class InvokeImpl3 extends InvocationLogic {
        @Override
        public int compute(int v1, int v2) {
            return v1;
        }
    }

    @State(Scope.Thread)
    public static class StateTargets {
        InvocationLogic[] arr;

        @Setup
        public void setup() {
            arr = new InvocationLogic[SIZE];
            Arrays.setAll(arr, i -> getImpl(i, 3));
        }

        private  InvocationLogic getImpl(int i, int targets) {
            return switch (i % targets) {
                case 0 -> new InvokeImpl1();
                case 1 -> new InvokeImpl2();
                default -> new InvokeImpl3();
            };
        }
    }

    int a0 = 42;
    int a1 = 43;

    @Benchmark
    @OperationsPerInvocation(SIZE)
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    public void primitive_args2(Blackhole bh, StateTargets st) {
        InvocationLogic[] arr = st.arr;
        for (InvocationLogic t : arr) {
            bh.consume(t.compute(a0, a1));
        }
    }

}
