Function jit_insn_set_param_ptr 

pub unsafe extern "C" fn jit_insn_set_param_ptr(
    func: jit_function_t,
    value: jit_value_t,
    type_: jit_type_t,
    offset: jit_nint,
) -> c_int

Same as jit_insn_set_param, except that the parameter is at *value.