* ieee.c: Add global function write_ieee_debugging_info and a

	* ieee.c: Add global function write_ieee_debugging_info and a
	bunch of static functions and structs used to write out IEEE
	debugging information.
	* budbg.h (write_ieee_debugging_info): Declare.

	* ieee.c (struct ieee_type): Add pslot field.
	(enum builtin_types): Define.
	(ieee_builtin_type): For a pointer, return a pointer to the named
	type.  Use enum values rather than numbers.
	(ieee_alloc_type): New static function.
	(ieee_read_type_index): Use ieee_alloc_type.
	(parse_ieee_bb): Likewise.
	(parse_ieee_ty): Likewise.  Use ieee_builtin_type for array range,
	rather than making a new integer type.  Store the new type in the
	slot, if there is one.
	(parse_ieee_atn): Treat ATN10 as defining a register variable.
	(ieee_regno_to_genreg): Rename from ieee_regno_to_gen.  Change all
	callers.
	(ieee_genreg_to_regno): New static function.