Conversion to irange wide_int API.

Conversion to irange wide_int API.

This converts the irange API to use wide_ints exclusively, along with
its users.

This patch will slow down VRP, as there will be more useless
wide_int to tree conversions.  However, this slowdown is only
temporary, as a follow-up patch will convert the internal
representation of iranges to wide_ints for a net overall gain
in performance.

gcc/ChangeLog:

	* fold-const.cc (expr_not_equal_to): Convert to irange wide_int API.
	* gimple-fold.cc (size_must_be_zero_p): Same.
	* gimple-loop-versioning.cc
	(loop_versioning::prune_loop_conditions): Same.
	* gimple-range-edge.cc (gcond_edge_range): Same.
	(gimple_outgoing_range::calc_switch_ranges): Same.
	* gimple-range-fold.cc (adjust_imagpart_expr): Same.
	(adjust_realpart_expr): Same.
	(fold_using_range::range_of_address): Same.
	(fold_using_range::relation_fold_and_or): Same.
	* gimple-range-gori.cc (gori_compute::gori_compute): Same.
	(range_is_either_true_or_false): Same.
	* gimple-range-op.cc (cfn_toupper_tolower::get_letter_range): Same.
	(cfn_clz::fold_range): Same.
	(cfn_ctz::fold_range): Same.
	* gimple-range-tests.cc (class test_expr_eval): Same.
	* gimple-ssa-warn-alloca.cc (alloca_call_type): Same.
	* ipa-cp.cc (ipa_value_range_from_jfunc): Same.
	(propagate_vr_across_jump_function): Same.
	(decide_whether_version_node): Same.
	* ipa-prop.cc (ipa_get_value_range): Same.
	* ipa-prop.h (ipa_range_set_and_normalize): Same.
	* range-op.cc (get_shift_range): Same.
	(value_range_from_overflowed_bounds): Same.
	(value_range_with_overflow): Same.
	(create_possibly_reversed_range): Same.
	(equal_op1_op2_relation): Same.
	(not_equal_op1_op2_relation): Same.
	(lt_op1_op2_relation): Same.
	(le_op1_op2_relation): Same.
	(gt_op1_op2_relation): Same.
	(ge_op1_op2_relation): Same.
	(operator_mult::op1_range): Same.
	(operator_exact_divide::op1_range): Same.
	(operator_lshift::op1_range): Same.
	(operator_rshift::op1_range): Same.
	(operator_cast::op1_range): Same.
	(operator_logical_and::fold_range): Same.
	(set_nonzero_range_from_mask): Same.
	(operator_bitwise_or::op1_range): Same.
	(operator_bitwise_xor::op1_range): Same.
	(operator_addr_expr::fold_range): Same.
	(pointer_plus_operator::wi_fold): Same.
	(pointer_or_operator::op1_range): Same.
	(INT): Same.
	(UINT): Same.
	(INT16): Same.
	(UINT16): Same.
	(SCHAR): Same.
	(UCHAR): Same.
	(range_op_cast_tests): Same.
	(range_op_lshift_tests): Same.
	(range_op_rshift_tests): Same.
	(range_op_bitwise_and_tests): Same.
	(range_relational_tests): Same.
	* range.cc (range_zero): Same.
	(range_nonzero): Same.
	* range.h (range_true): Same.
	(range_false): Same.
	(range_true_and_false): Same.
	* tree-data-ref.cc (split_constant_offset_1): Same.
	* tree-ssa-loop-ch.cc (entry_loop_condition_is_static): Same.
	* tree-ssa-loop-unswitch.cc (struct unswitch_predicate): Same.
	(find_unswitching_predicates_for_bb): Same.
	* tree-ssa-phiopt.cc (value_replacement): Same.
	* tree-ssa-threadbackward.cc
	(back_threader::find_taken_edge_cond): Same.
	* tree-ssanames.cc (ssa_name_has_boolean_range): Same.
	* tree-vrp.cc (find_case_label_range): Same.
	* value-query.cc (range_query::get_tree_range): Same.
	* value-range.cc (irange::set_nonnegative): Same.
	(frange::contains_p): Same.
	(frange::singleton_p): Same.
	(frange::internal_singleton_p): Same.
	(irange::irange_set): Same.
	(irange::irange_set_1bit_anti_range): Same.
	(irange::irange_set_anti_range): Same.
	(irange::set): Same.
	(irange::operator==): Same.
	(irange::singleton_p): Same.
	(irange::contains_p): Same.
	(irange::set_range_from_nonzero_bits): Same.
	(DEFINE_INT_RANGE_INSTANCE): Same.
	(INT): Same.
	(UINT): Same.
	(SCHAR): Same.
	(UINT128): Same.
	(UCHAR): Same.
	(range): New.
	(tree_range): New.
	(range_int): New.
	(range_uint): New.
	(range_uint128): New.
	(range_uchar): New.
	(range_char): New.
	(build_range3): Convert to irange wide_int API.
	(range_tests_irange3): Same.
	(range_tests_int_range_max): Same.
	(range_tests_strict_enum): Same.
	(range_tests_misc): Same.
	(range_tests_nonzero_bits): Same.
	(range_tests_nan): Same.
	(range_tests_signed_zeros): Same.
	* value-range.h (Value_Range::Value_Range): Same.
	(irange::set): Same.
	(irange::nonzero_p): Same.
	(irange::contains_p): Same.
	(range_includes_zero_p): Same.
	(irange::set_nonzero): Same.
	(irange::set_zero): Same.
	(contains_zero_p): Same.
	(frange::contains_p): Same.
	* vr-values.cc
	(simplify_using_ranges::op_with_boolean_value_range_p): Same.
	(bounds_of_var_in_loop): Same.
	(simplify_using_ranges::legacy_fold_cond_overflow): Same.