DATA_ALIGNMENT vs. DECL_USER_ALIGNMENT

[Richard Kenner]

    Yes.  64-bit S/390 requires 2-byte alignment.  The alignment can be 2
    or anything stricter than 2 for 64-bit S/390.  GNU Ada currently is
    setting USER_ALIGN to 1 for some objects, which is breaking GNU Ada on
    64-bit S/390.

Actually, it *isn't* setting DECL_USER_ALIGN for any objects and I
believe that's correct.  It's stor-layout.c that is setting it from
TYPE_USER_ALIGN and that seems quite wrong: there is a difference
between specifying the alignment of a type and that of an object and
DECL_USER_ALIGN means the latter.