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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using System.Runtime.CompilerServices;
using Xunit;
// Tests that side effects induced by the HWI nodes are correctly accounted for.
unsafe class HwiSideEffects
{
[Fact]
public static void TestProblemWithInterferenceChecks()
{
Assert.Equal((uint)2, ProblemWithInterferenceChecks(2));
}
[MethodImpl(MethodImplOptions.NoInlining)]
private static uint ProblemWithInterferenceChecks(uint a)
{
uint x;
if (Bmi2.IsSupported)
{
// Make sure we don't try to contain "a" under the "add" here.
x = a + Bmi2.MultiplyNoFlags(a, a, &a);
}
else
{
x = a;
}
return x;
}
[Fact]
public static void TestProblemWithThrowingLoads()
{
Assert.True(ProblemWithThrowingLoads(null));
}
[MethodImpl(MethodImplOptions.NoInlining)]
private static bool ProblemWithThrowingLoads(int* a)
{
bool result = false;
try
{
Vector128.Load(a);
}
catch (NullReferenceException)
{
result = true;
}
return result;
}
}
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