re PR middle-end/44204 (ICE in gimple_op_ptr, at gimple.h:167)

	PR middle-end/44204
	* builtins.c (fold_call_stmt): Pass &error_mark_node if the call
	statement has no arguments.

From-SVN: r159662

gcc/ChangeLog

+2010-05-21  Nathan Froyd  <froydnj@codesourcery.com>
+
+	PR middle-end/44204
+	* builtins.c (fold_call_stmt): Pass &error_mark_node if the call
+	statement has no arguments.
+
 2010-05-21  Kai Tietz  <kai.tietz@onevision.com>
 
 	PR/44139

gcc/builtins.c

@@ -13699,7 +13699,9 @@ fold_call_stmt (gimple stmt, bool ignore)
       if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
         {
 	  return targetm.fold_builtin (fndecl, nargs,
-				       gimple_call_arg_ptr (stmt, 0), ignore);
+				       (nargs > 0
+					? gimple_call_arg_ptr (stmt, 0)
+					: &error_mark_node), ignore);
         }
       else
 	{