tree-flow.h (number_of_iterations_cond): Declaration removed.

	* tree-flow.h (number_of_iterations_cond): Declaration removed.
	* tree-ssa-loop-niter.c (number_of_iterations_cond): Made static.
	(number_of_iterations_special): New function.
	(number_of_iterations_exit): Use number_of_iterations_special.
	Use simplify_using_outer_evolutions only at -O3.
	(number_of_iterations_cond, tree_simplify_using_condition,
	simplify_using_initial_conditions, loop_niter_by_eval,
	compare_trees, can_count_iv_in_wider_type_bound,
	simplify_using_outer_evolutions): Use fold_build.

From-SVN: r97673