2004-07-02  Daniel Berlin  <dberlin@dberlin.org)

	* tree-ssa-pre.c (bitmap_set_t): New.
	(bb_value_sets): avail_out is now a bitmap_set_t.
	(bitmap_find_leader): New function.
	(bitmap_value_insert_into_set): Ditto.
	(bitmap_set_copy): Ditto.
	(bitmap_value_replace_in_set): Ditto.
	(bitmap_set_contains_value): Ditto.
	(bitmap_set_new): Ditto.
	(bitmap_set_pool): New pool.
	(find_or_generate_expression): Use bitmap_ functions on AVAIL sets.
	(insert_aux): Ditto.
	(add_to_sets): Ditto.
	(compute_avail): Ditto
	(eliminate): Ditto.
	(init_pre): Ditto.
	(fini_pre): Ditto.
	(execute_pre): Ditto.

From-SVN: r84025