Add statement context to get_value_range.

Add statement context to get_value_range.

This is in line with the statement context that we have for get_value()
in the substitute_and_fold_engine class.

gcc/ChangeLog:

	* vr-values.c (vr_values::get_value_range): Add stmt param.
	(vr_values::extract_range_from_comparison): Same.
	(vr_values::extract_range_from_assignment): Pass stmt to
	extract_range_from_comparison.
	(vr_values::adjust_range_with_scev): Pass stmt to get_value_range.
	(simplify_using_ranges::vrp_evaluate_conditional): Add stmt param.
	Pass stmt to get_value_range.
	(simplify_using_ranges::vrp_visit_cond_stmt): Pass stmt to
	get_value_range.
	(simplify_using_ranges::simplify_abs_using_ranges): Same.
	(simplify_using_ranges::simplify_div_or_mod_using_ranges): Same.
	(simplify_using_ranges::simplify_bit_ops_using_ranges): Same.
	(simplify_using_ranges::simplify_cond_using_ranges_1): Same.
	(simplify_using_ranges::simplify_switch_using_ranges): Same.
	(simplify_using_ranges::simplify_float_conversion_using_ranges): Same.
	* vr-values.h (class vr_values): Add stmt arg to
	vrp_evaluate_conditional_warnv_with_ops.
	Add stmt arg to extract_range_from_comparison and get_value_range.
	(simplify_using_ranges::get_value_range): Add stmt arg.