109 lines
3.0 KiB
C#
109 lines
3.0 KiB
C#
namespace Burst.Compiler.IL.Tests.Shared
|
|
{
|
|
internal class TestStackalloc
|
|
{
|
|
[TestCompiler]
|
|
public static unsafe int Stackalloc1ByteWithInitializer()
|
|
{
|
|
var value = stackalloc byte[1] { 0xA4 };
|
|
return value[0];
|
|
}
|
|
|
|
[TestCompiler]
|
|
public static unsafe int Stackalloc16BytesWithInitializer()
|
|
{
|
|
// Roslyn generates quite different IL when the number of bytes is larger than 8.
|
|
var value = stackalloc byte[16] { 0xA4, 0xA1, 0x20, 0xA5, 0x80, 0x17, 0xF6, 0x4F, 0xBD, 0x18, 0x16, 0x73, 0x43, 0xC5, 0xAF, 0x16 };
|
|
return value[9];
|
|
}
|
|
|
|
[TestCompiler]
|
|
public static unsafe int Stackalloc16IntsWithInitializer()
|
|
{
|
|
var value = stackalloc int[16] { 0xA4, 0xA1, 0x20, 0xA5, 0x80, 0x17, 0xF6, 0x4F, 0xBD, 0x18, 0x16, 0x73, 0x43, 0xC5, 0xAF, 0x16 };
|
|
return value[9];
|
|
}
|
|
|
|
[TestCompiler(1)]
|
|
public static unsafe int StackallocInBranch(int takeBranch)
|
|
{
|
|
int* array = null;
|
|
|
|
if (takeBranch != 0)
|
|
{
|
|
int* elem = stackalloc int[1];
|
|
array = elem;
|
|
}
|
|
|
|
if (takeBranch != 0)
|
|
{
|
|
int* elem = stackalloc int[1];
|
|
|
|
if (array == elem)
|
|
{
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
[TestCompiler(4)]
|
|
public static unsafe int StackallocInLoop(int iterations)
|
|
{
|
|
int** array = stackalloc int*[iterations];
|
|
|
|
for (int i = 0; i < iterations; i++)
|
|
{
|
|
int* elem = stackalloc int[1];
|
|
array[i] = elem;
|
|
}
|
|
|
|
for (int i = 0; i < iterations; i++)
|
|
{
|
|
for (int k = i + 1; k < iterations; k++)
|
|
{
|
|
// Make sure all the stack allocations within the loop are unique addresses.
|
|
if (array[i] == array[k])
|
|
{
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
[TestCompiler]
|
|
public static unsafe int StackallocWithUnmanagedConstructedType()
|
|
{
|
|
var value = stackalloc[]
|
|
{
|
|
new Point<int> { X = 1, Y = 2 },
|
|
new Point<int> { X = 42, Y = 5 },
|
|
new Point<int> { X = 3, Y = -1 },
|
|
};
|
|
return value[1].X;
|
|
}
|
|
|
|
private struct Point<T>
|
|
{
|
|
public T X;
|
|
public T Y;
|
|
}
|
|
|
|
#if UNITY_2021_2_OR_NEWER || BURST_INTERNAL
|
|
[TestCompiler]
|
|
public static int StackallocInNestedExpression()
|
|
{
|
|
return StackallocInNestedExpressionHelper(stackalloc[] { 2, 4, 6, 8 });
|
|
}
|
|
|
|
private static int StackallocInNestedExpressionHelper(System.Span<int> span)
|
|
{
|
|
return span[2];
|
|
}
|
|
#endif
|
|
}
|
|
}
|