Procval register_class : Reg.t -> intval phys_reg : int -> Reg.tval loc_exn_bucket : Reg.tval loc_spacetime_node_hole : Reg.tval safe_register_pressure : Mach.operation -> intval max_register_pressure : Mach.operation -> int arrayval destroyed_at_oper : Mach.instruction_desc -> Reg.t arrayval destroyed_at_raise : Reg.t arrayval destroyed_at_reloadretaddr : Reg.t arrayval regs_are_volatile : Reg.t array -> boolval op_is_pure : Mach.operation -> boolval contains_calls : bool refFor a given register class, the DWARF register numbering for that class. Given an allocated register with location Reg n and class reg_class, the returned array contains the corresponding DWARF register number at index n - first_available_register.(reg_class).
The DWARF register number corresponding to the stack pointer.