* tree-tailcall.c (suitable_for_tail_opt_p): Also check DECL_EXTERNAL.

From-SVN: r85791

gcc/ChangeLog

+2004-08-10  Richard Henderson  <rth@redhat.com>
+
+	* tree-tailcall.c (suitable_for_tail_opt_p): Also check DECL_EXTERNAL.
+
 2004-08-09  Mark Mitchell  <mark@codesourcery.com>
 
 	* config.gcc (arm*-*-eabi*): New target.

gcc/tree-tailcall.c

@@ -143,7 +143,7 @@ suitable_for_tail_opt_p (void)
     {
       tree var = VARRAY_TREE (referenced_vars, i);
 
-      if (!TREE_STATIC (var)
+      if (!(TREE_STATIC (var) || DECL_EXTERNAL (var))
 	  && var_ann (var)->mem_tag_kind == NOT_A_TAG
 	  && is_call_clobbered (var))
 	return false;