val compare : t -> t -> intval holds_value_of : t -> Backend_var.tThe identifier that the register holds (part of) the value of.
val part_of_value : t -> intval num_parts_of_value : t -> intval which_parameter : t -> int optionIf the register corresponds to a function parameter, the value returned is the zero-based index of said parameter; otherwise it is
None.
val provenance : t -> unit option