PR tree-optimization/65447

	PR tree-optimization/65447
	* tree-ssa-loop-ivopts.c (struct iv_use): New fields.
	(dump_use, dump_uses): Support to dump sub use.
	(record_use): New parameters to support sub use.  Remove call to
	dump_use.
	(record_sub_use, record_group_use): New functions.
	(compute_max_addr_offset, split_all_small_groups): New functions.
	(group_address_uses, rewrite_use_address): New functions.
	(strip_offset): New declaration.
	(find_interesting_uses_address): Call record_group_use.
	(add_candidate): New assertion.
	(infinite_cost_p): Move definition forward.
	(add_costs): Check INFTY cost and return immediately.
	(get_computation_cost_at): Clear setup cost and dependent bitmap
	for sub uses.
	(determine_use_iv_cost_address): Compute cost for sub uses.
	(rewrite_use_address_1): Rename from old rewrite_use_address.
	(free_loop_data): Free sub uses.
	(tree_ssa_iv_optimize_loop): Call group_address_uses.

	gcc/testsuite
	PR tree-optimization/65447
	* gcc.dg/tree-ssa/pr65447.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223433 138bc75d-0d04-0410-961f-82ee72b054a4