utils.c (update_pointer_to): In the unconstrained array case, merge the alias…

utils.c (update_pointer_to): In the unconstrained array case, merge the alias set of the old pointer type.

	* gcc-interfaces/utils.c (update_pointer_to): In the unconstrained
	array case, merge the alias set of the old pointer type.

From-SVN: r162488

gcc/ada/ChangeLog

 2010-07-23  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interfaces/utils.c (update_pointer_to): In the unconstrained
+	array case, merge the alias set of the old pointer type.
+
+2010-07-23  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/utils.c (gnat_types_compatible_p): Revert latest change
 	and recurse only for multidimensional array types instead.
 

gcc/ada/gcc-interface/utils.c

@@ -3510,6 +3510,7 @@ update_pointer_to (tree old_type, tree new_type)
       DECL_FIELD_CONTEXT (bounds_field) = new_ptr;
       for (t = new_ptr; t; last = t, t = TYPE_NEXT_VARIANT (t))
 	TYPE_FIELDS (t) = TYPE_FIELDS (ptr);
+      TYPE_ALIAS_SET (new_ptr) = TYPE_ALIAS_SET (ptr);
 
       /* Chain PTR and its variants at the end.  */
       TYPE_NEXT_VARIANT (last) = TYPE_MAIN_VARIANT (ptr);