2009-07-08 Jerry DeLisle <jvdelisle@gcc.gnu.org>

2009-07-08  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/40330
	PR libfortran/40662
	* io/io.h (st_parameter_dt): Define format_not_saved bit used to signal
	whether the parsed format data was previously saved. Used to determine
	if the current format data should be freed or not.
	* io/transfer.c (st_read_done): Use the format_not_saved bit.
	(st_write_done): Likewise.
	* io/format.c (parse_format_list): Add boolean pointer to arg list. This
	pointer is used to return status to the caller regarding whether it is
	safe to cache the parsed format data.  Currently, if a FMT_STRING token
	is encounetered, it is not safe to cache. Also, added a local boolean
	variable to hold this information as recursive calls to
	parse_format_list are made.  Remove previous save_format logic.
	(parse_format): Do not use the format caching facility if the current
	unit is an internal unit or if it is not safe to save parsed format
	data.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149398 138bc75d-0d04-0410-961f-82ee72b054a4