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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.
// See the LICENSE file in the project root for more information.
//
using System;
using System.Runtime.CompilerServices;
public struct Struct1
{
public bool bfield;
public Struct1(bool b)
{
bfield = b;
}
}
public struct Struct8
{
public double dfield;
public Struct8(double d)
{
dfield = d;
}
}
class GenericClass<T> { }
class GenericException<T> : Exception
{
}
public class Test
{
// Test a recursive tail call with a 1-byte struct parameter.
static bool TestStruct1Param(Struct1 str1, int count)
{
Console.WriteLine(count);
Console.WriteLine(count);
Console.WriteLine(count);
Console.WriteLine(count);
if (!CheckStruct1(str1))
{
return false;
}
if (count <= 0)
{
return true;
}
return TestStruct1Param(str1, count - 1);
}
[MethodImpl(MethodImplOptions.NoInlining)]
static bool CheckStruct1(Struct1 str1)
{
return str1.bfield;
}
// Test a recursive tail call with an 8-byte struct parameter.
static bool TestStruct8Param(Struct8 str8, int count)
{
Console.WriteLine(count);
Console.WriteLine(count);
Console.WriteLine(count);
Console.WriteLine(count);
if (!CheckStruct8(str8))
{
return false;
}
if (count <= 0)
{
return true;
}
return TestStruct8Param(str8, count - 1);
}
[MethodImpl(MethodImplOptions.NoInlining)]
static bool CheckStruct8(Struct8 str8)
{
return (str8.dfield == 1.0);
}
// Test a recursive tail call to a method with generic sharing.
bool TestGenericSharing<T>()
{
if (typeof(T) == typeof(string))
{
return true;
}
else
{
return TestGenericSharing<string>();
}
}
// Test a recursive tail call to a method with hidden generic context param.
// This test will make sure that when a recursive call is converte to a loop
// there is no mismatch of generic context reported to VM and the one used
// within the method.
public static int TestGenericContext<T>(int x)
{
try
{
if (x == 1) throw new GenericException<T>();
}
catch (GenericException<T>)
{
return 1;
}
return x * TestGenericContext<GenericClass<T>>(x - 1);
}
// Test a recursive tail call to a method that has a 'this' parameter
// and a parameter passed on the stack.
bool TestStackParam(int i1, int i2, int i3, int i4)
{
if ((i3 != 5) || (i4 != 7))
{
return false;
}
if (i1 == 0)
{
return true;
}
return TestStackParam(i1 - 1, i2, i3, i4);
}
public static int Main()
{
const int Pass = 100;
const int Fail = -1;
Struct1 str1 = new Struct1(true);
if (!TestStruct1Param(str1, 4))
{
return Fail;
}
Struct8 str8 = new Struct8(1.0);
if (!TestStruct8Param(str8, 4))
{
return Fail;
}
Test test = new Test();
if (!test.TestGenericSharing<object>())
{
return Fail;
}
if (!test.TestStackParam(1, 0, 5, 7))
{
return Fail;
}
if (TestGenericContext<GenericClass<int>>(5) != 120)
{
return Fail;
}
return Pass;
}
}
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