Add stmt context in simplify_using_ranges.

Add stmt context in simplify_using_ranges.

There were places simplify_using_ranges was not utilzing the stmt context.

	* vr-values.c (vr_values::vrp_stmt_computes_nonzero): Use stmt.
	(simplify_using_ranges::op_with_boolean_value_range_p): Add a
	statement for location context.
	(check_for_binary_op_overflow): Ditto.
	(simplify_using_ranges::get_vr_for_comparison): Ditto.
	(simplify_using_ranges::compare_name_with_value): Ditto.
	(simplify_using_ranges::compare_names): Ditto.
	(vrp_evaluate_conditional_warnv_with_ops_using_ranges): Ditto.
	(simplify_using_ranges::simplify_truth_ops_using_ranges): Ditto.
	(simplify_using_ranges::simplify_min_or_max_using_ranges): Ditto.
	(simplify_using_ranges::simplify_internal_call_using_ranges): Ditto.
	(simplify_using_ranges::two_valued_val_range_p): Ditto.
	(simplify_using_ranges::simplify): Ditto.
	* vr-values.h: Adjust prototypes.