Replace evrp use in loop versioning with ranger.

Replace evrp use in loop versioning with ranger.

This patch replaces the evrp_range_analyzer in the loop versioning code
with an on-demand ranger.

Tested on x86-64 Linux.

gcc/ChangeLog:

	* gimple-loop-versioning.cc (lv_dom_walker::lv_dom_walker): Remove
	use of m_range_analyzer.
	(loop_versioning::lv_dom_walker::before_dom_children): Same.
	(loop_versioning::lv_dom_walker::after_dom_children): Remove.
	(loop_versioning::prune_loop_conditions): Replace vr_values use
	with range_query interface.
	(pass_loop_versioning::execute): Use ranger.