tree-ssa-loop-im.c: Include hashtab.h.

	* tree-ssa-loop-im.c: Include hashtab.h.
	(struct mem_ref_loc): New.
	(struct mem_ref): Describe the set of references with the same
	shape.
	(max_stmt_uid, get_stmt_uid, record_mem_ref, free_mem_refs,
	maybe_queue_var, fem_single_reachable_address,
	for_each_memref, single_reachable_address,
	is_call_clobbered_ref, determine_lsm_reg): Removed.
	(record_mem_ref_loc, free_mem_ref_locs, determine_lsm_ref,
	hoist_memory_reference, memref_hash, memref_eq, memref_del,
	gather_mem_refs_stmt, gather_mem_refs, find_more_ref_vops):
	New functions.
	(rewrite_mem_refs, schedule_sm): Use mem_ref_loc list.
	(determine_lsm_loop): Rewritten.
	(determine_lsm): Do not set stmt uids.

From-SVN: r99539