* toplev.c (dump_memory_report): Call dump_vec_loc_statistics.
	* vec.c: Include hashtab.h
	(vec_descriptor, ptr_hash_entry): New structures.
	(vec_desc_hash, vec_ptr_map): New static variables.
	(hash_descriptor, eq_descriptor, hash_ptr, eq_ptr, vec_descriptor,
	register_overhead, free_overhead, vec_heap_free): New functions.
	(vec_gc_o_reserve_1): ggc_free when resizing to 0.
	(vec_heap_o_reserve_1): free when resizing to 0; add statistics.
	(cmp_statistic, add_statistics, dump_vec_loc_statistics): New functions.

From-SVN: r140277