1 files changed, 41 insertions, 0 deletions
diff --git a/tests/src/JIT/opt/Enum/shared.cs b/tests/src/JIT/opt/Enum/shared.cs
new file mode 100644
index 0000000000..f15361a05a
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+++ b/tests/src/JIT/opt/Enum/shared.cs
@@ -0,0 +1,41 @@
+// 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.
+
+// Some simple tests for the Enum.HasFlag optimization.
+// Verify the optimization avoids firing for shared types.
+
+using System;
+using System.Runtime.CompilerServices;
+
+class MyG<T,U> 
+{
+    public enum A 
+    {
+        X = 1
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    public static void foo() 
+    {
+        var a = MyG<object,U>.A.X;
+        a.HasFlag(MyG<T,string>.A.X);
+    }
+}
+
+class My 
+{
+    public static int Main() 
+    {
+        int result = 0;
+        try 
+        {
+            MyG<My,My>.foo();
+        }
+        catch(ArgumentException)
+        {
+            result = 100;
+        }
+        return result;
+    }
+}