* tree-dfa.c (renumber_gimple_stmt_uids_in_blocks): New function.
	* tree-flow.h (renumber_gimple_stmt_uids_in_blocks): Declare it.
	* tree-ssa-loop-ivopts.c (comp_cost): Make COST an integer.
	(enum iv_position): Add IP_AFTER_USE and IP_BEFORE_USE.
	(dump_cand): Handle them.
	(struct iv_cand): New members COST_STEP and AINC_USE.
	(stmt_after_increment): Likewise.
	(stmt_after_inc_pos): Renamed from stmt_after_ip_original_pos.  All
	callers changed.  Use gimple_uid comparison instead of scanning.
	(add_candidate_1): When looking for identical candidates, take
	AINC_USE into account.  Set it for new candidates.
	(force_expr_to_var_cost): Cast target_spill_cost to int.
	(get_address_cost): New arguments STMT_AFTER_INC and MAY_AUTOINC.
	All callers changed.  Check for availability of autoinc addressing
	modes, both in general for a given mode, and in the specific use
	case.
	(get_computation_cost_at): New argument CAN_AUTOINC.  All callers
	changed.
	(get_computation_cost): Likewise.
	(autoinc_possible_for_pair, set_autoinc_for_original_candidates,
	add_autoinc_candidates): New static functions.
	(add_candidate): Call add_autoinc_candidates for candidates based on
	a USE_ADDRESS use.
	(find_iv_candidates): Call set_autoinc_for_original_candidates.
	(determine_use_iv_cost_address): If we have an autoinc candidate at
	the matching use, verify autoinc is possible and subtract the cost
	of the candidate's step from the cost.
	(determine_iv_cost): Record the cost of the increment in the COST_STEP
	member of the candidate.
	(tree_ssa_iv_optimize_loop): Swap the calls to determine_iv_costs and
	determine_use_iv_costs.  Call renumber_gimple_stmt_uids_in_blocks.

testsuite/
	* gcc.target/bfin/loop-autoinc.c: New file.

From-SVN: r150588