using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

BenchmarkRunner.Run<NullableEqualsBenchmarks>();

public class NullableEqualsBenchmarks
{
    [Params(1, 0, null)]
    public int? Prop { get; set; }

    [Benchmark]
    public int CurrentLoweringNonDefault()
    {
        int? num = Prop;
        int num2 = 42;
        if ((num.GetValueOrDefault() == num2) & num.HasValue)
        {
            return 1;
        }

        return 0;
    }

    [Benchmark]
    public int ProposedLoweringNonDefault()
    {
        if (Prop.GetValueOrDefault() == 42)
        {
            return 1;
        }

        return 0;
    }

    [Benchmark]
    public int CurrentLoweringDefault()
    {
        int? num = Prop;
        int num2 = 0;
        if ((num.GetValueOrDefault() == num2) & num.HasValue)
        {
            return 1;
        }

        return 0;
    }

    [Benchmark]
    public int ProposedLoweringDefault()
    {
        if (Prop.GetValueOrDefault(1) == 0)
        {
            return 1;
        }

        return 0;
    }
}