1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/gnat.dg/warn4.adb b/gcc/testsuite/gnat.dg/warn4.adb
new file mode 100644
index 000000000..94147c1e6
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/warn4.adb
@@ -0,0 +1,30 @@
+-- { dg-do compile }
+-- { dg-options "-O2" }
+
+with Unchecked_Conversion;
+
+procedure Warn4 is
+
+   type POSIX_Character is new Standard.Character;
+   type POSIX_String is array (Positive range <>) of aliased POSIX_Character;
+
+   type String_Ptr is access all String;
+   type POSIX_String_Ptr is access all POSIX_String;
+
+   function sptr_to_psptr is new Unchecked_Conversion -- { dg-warning "aliasing problem" }
+     (String_Ptr, POSIX_String_Ptr); -- { dg-warning "" "" { target *-*-* } 14 }
+
+   function To_POSIX_String (Str : String) return POSIX_String;
+   function To_POSIX_String (Str : String)
+      return POSIX_String is
+   begin
+      return sptr_to_psptr (Str'Unrestricted_Access).all;
+   end To_POSIX_String;
+
+   A : Boolean;
+   S : String := "ABCD/abcd";
+   P : Posix_String := "ABCD/abcd";
+
+begin
+   A := To_POSIX_String (S) = P;
+end;