1 files changed, 29 insertions, 0 deletions
diff --git a/tests/src/JIT/opt/Devirtualization/box1.cs b/tests/src/JIT/opt/Devirtualization/box1.cs
new file mode 100644
index 0000000000..51121f37d8
--- /dev/null
+++ b/tests/src/JIT/opt/Devirtualization/box1.cs
@@ -0,0 +1,29 @@
+// 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;
+
+interface IPrint 
+{
+    void Print();
+}
+
+struct X<T> : IPrint
+{
+    public X(T t) { _t = t; }
+    public void Print() { Console.WriteLine(_t); }
+    T _t;
+}
+
+class Y
+{
+    static int Main()
+    {
+        var s = new X<string>("hello, world!");
+        // Jit should devirtualize, remove box,
+        // change to call unboxed entry, then inline.
+        ((IPrint)s).Print();
+        return 100;
+    }
+}