tree-ssa-alias.c (compute_memory_partitions): Use alias_bitmap_obstack to allocate...

tree-ssa-alias.c (compute_memory_partitions): Use alias_bitmap_obstack to allocate bitmaps.

	* tree-ssa-alias.c (compute_memory_partitions): Use
	alias_bitmap_obstack to allocate bitmaps.
	(reset_alias_info): Factor out of init_alias_info.
	Mark all name tags not associated to an SSA name for renaming.
	(init_alias_info): Call it.
	(create_name_tags): Tidy.  Add comments.
	(dump_points_to_info_for): Do not call get_mem_sym_stats_for.

testsuite/ChangeLog

	gcc.dg/tree-ssa/20070815.c: New test.

From-SVN: r127520