sizetype, bitsizetype and DECL_FIELD_BITPOS

[Richard Kenner]

    >                                        I see places where it is
    > used in both contexts and, unless I'm missing something, we are missing
    > conversions.
    
    I suppose you mean this?

          offset = size_binop (PLUS_EXPR, offset,
                               size_binop (EXACT_DIV_EXPR, var,
                                           size_int (BITS_PER_UNIT)));

Yes.  VAR is clearly bitsizetype and OFFSET is supposed to be sizetype
and there's no conversion.