DATA_ALIGNMENT vs. DECL_USER_ALIGNMENT

[Richard Kenner]

    Maybe.  I'm a bit confused as to why *_USER_ALIGN would be set for
    "most types" though.  Seems to me that should only be done if the
    USER did something specific, like "for x'alignment use N".

Because of the requirement that the alignment of most types be *static*.
So they cannot be changed from what the front end thinks they are, whether
or not they got that way by explicit user action.