Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-640.cs

@@ -0,0 +1,34 @@
+enum MyEnum : byte
+{
+	Value_1 = 1
+}
+
+public class C
+{
+	public static int Main ()
+	{
+		MyEnum me = MyEnum.Value_1;
+		MyEnum b = ~me;
+		
+		if (b != (MyEnum)254)
+			return 1;
+		
+		byte r = b - me;
+		if (r != 253)
+			return 2;
+		
+		b = b - 2;
+		if (b != (MyEnum)252)
+			return 3;
+			
+		me -= MyEnum.Value_1;
+		
+		b = (MyEnum)255;
+		b &= ~MyEnum.Value_1;
+		if (b != (MyEnum)254)
+			return 4;
+
+		System.Console.WriteLine ("OK");
+		return 0;
+	}
+}