The full command-line option is /[NO]ALIGNMENT=option.

    Controls the alignment of code and data. Valid options are:

    Option   Function

    CODE     Alignment of certain branch target labels.
    DATA     Natural alignment of data items.

    If you omit the qualifier from the command line, the default
    options are /NOALIGNMENT=(CODE, DATA). If more than one option
    is specified, the options must be enclosed in parentheses and
    separated by a comma.