(x86) Saves copies of register-based function arguments in the stack.
When none is specified or if the -preserve_argvalues option is not specified on the command line, the compiler behaves as usual.
When simple is specified, up to six integer arguments are saved.
When complete is specified, the values of all function arguments in the stack trace are visible to the user in the proper order.
The values are not updated during the function lifetime on assignments to formal parameters.