[Ada] Fix crash in ASIS mode

[Eric Botcazou]

Tested on x86_64-suse-linux, applied on the mainline.


2013-09-18  Eric Botcazou  <ebotca...@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Abstract_State>: New.


-- 
Eric Botcazou
Index: gcc-interface/decl.c
===================================================================
--- gcc-interface/decl.c	(revision 202681)
+++ gcc-interface/decl.c	(working copy)
@@ -4812,6 +4812,12 @@ gnat_to_gnu_entity (Entity_Id gnat_entit
       saved = true;
       break;
 
+    case E_Abstract_State:
+      /* This is a SPARK annotation that only reaches here when compiling in
+	 ASIS mode and has no characteristics to annotate.  */
+      gcc_assert (type_annotate_only);
+      return error_mark_node;
+
     default:
       gcc_unreachable ();
     }