tree-ssa-loop-ivopts.c (get_loop_invariant_expr): Simplify.

	* tree-ssa-loop-ivopts.c (get_loop_invariant_expr): Simplify.
	(adjust_setup_cost): New parameter supporting round up adjustment.
	(struct address_cost_data): Delete.
	(force_expr_to_var_cost): Don't bound cost with spill_cost.
	(split_address_cost, ptr_difference_cost): Delete.
	(difference_cost, compare_aff_trees, record_inv_expr): Delete.
	(struct ainc_cost_data): New struct.
	(get_address_cost_ainc): New function.
	(get_address_cost, get_computation_cost): Reimplement.
	(determine_group_iv_cost_address): Record inv_expr for all uses of
	a group.
	(determine_group_iv_cost_cond): Call get_loop_invariant_expr.
	(iv_ca_has_deps): Reimplemented to ...
	(iv_ca_more_deps): ... this.  Check if NEW_CP introduces more deps
	than OLD_CP.
	(iv_ca_extend): Call iv_ca_more_deps.

From-SVN: r247885