tree-ssa-coalesce.c (struct coalesce_list): Add obstack member.

tree-ssa-coalesce.c (struct coalesce_list): Add obstack member.

2018-11-02  Richard Biener  <rguenther@suse.de>

	* tree-ssa-coalesce.c (struct coalesce_list): Add obstack member.
	(pop_cost_one_pair): Do not free pair.
	(pop_best_coalesce): Likewise.
	(create_coalesce_list): Initialize obstack.
	(delete_coalesce_list): Free obstack.
	(find_coalesce_pair): Obstack-allocate coalesce pairs.
	(add_cost_one_coalesce): Likewise.
	(struct live_track): Remove bitmap pointer indirections.
	(new_live_track): Adjust.
	(delete_live_track): Likewise.
	(live_track_remove_partition): Likewise.
	(live_track_add_partition): Likewise.
	(live_track_live_p): Likewise.
	(live_track_process_def): Likewise.
	(live_track_clear_base_vars): Likewise.

From-SVN: r265745