diff options
Diffstat (limited to 'tests/src/JIT/Regression/JitBlue/GitHub_7907/GitHub_7907.cs')
-rw-r--r-- | tests/src/JIT/Regression/JitBlue/GitHub_7907/GitHub_7907.cs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_7907/GitHub_7907.cs b/tests/src/JIT/Regression/JitBlue/GitHub_7907/GitHub_7907.cs new file mode 100644 index 0000000000..32ea54c663 --- /dev/null +++ b/tests/src/JIT/Regression/JitBlue/GitHub_7907/GitHub_7907.cs @@ -0,0 +1,53 @@ +// 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; + +#pragma warning disable 472 + +public class Bug7907 +{ + int _position = 10; + + [MethodImpl(MethodImplOptions.NoInlining)] + public static int G(int z, ref int r) + { + r -= z; + return 1; + } + + [MethodImpl(MethodImplOptions.NoInlining)] + public int F0(int count) + { + int initialCount = count; + + _position += G(_position, ref count); + + if (initialCount == count) + { + count--; + } + + return initialCount - count; + } + + [MethodImpl(MethodImplOptions.NoInlining)] + public int F1(int count) + { + // " != null" is known to be true - just to remove control flow + // since that by itself may force spilling and mask the bug + count -= (_position += G(_position, ref count)) != null ? count : 1; + + return count; + } + + public static int Main(string[] args) + { + int result0 = new Bug7907().F0(10); + int result1 = new Bug7907().F1(10); + Console.WriteLine("R0={0} R1={1}", result0, result1); + return (result0 == 10 && result1 == 10 ? 100 : -1); + } +} |