graphite-sese-to-poly.c (free_data_refs_aux): Update to free the new structure.

2009-10-20  Li Feng  <nemokingdom@gmail.com>

	* graphite-sese-to-poly.c (free_data_refs_aux): Update to free
	the new structure.
	(pdr_add_alias_set): Update retrieving alias_set_num.
	(build_poly_dr): Update retrieving dr_base_object_set.
	(partition_drs_to_sets): Remove.
	(build_alias_set_optimal_p): New.
	(build_alias_set_for_drs): Rename.
	(build_scop_drs): Update.
	* graphite-sese-to-poly.h (struct base_alias_pair): New.
	(ALIAS_SET_INDEX): Remove.
	(BASE_OBJECT_SET_INDEX): Remove.

From-SVN: r154614