2003-04-09  Dan Nicolaescu  <dann@ics.uci.edu>
	    Zack Weinberg  <zack@codesourcery.com>

	* regrename.c (struct du_chain): Use a bitfield for reg_class.
	* cse.c (struct qty_table_elem, struct table_elt, struct set):
	Use bitfields for fields holding enum rtx_code or
	enum machine_mode values.  Add comments explaining size choices.

From-SVN: r65419