http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51994
--- Comment #28 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-01 15:41:52 UTC --- (In reply to comment #27) > (In reply to comment #25) > > I've changed my mind: given that we shouldn't have references outside the > > base > > object in valid programs, there must be an offset if the bitpos is > > negative, so > > we can simply add the (rounded) latter to the former. That's what the > > callers > > would have to do anyway, so we'd better factor it in get_inner_reference. > > I'm not sure it's the best thing to do (adjusting 'offset' by > a BITS_PER_UNIT multiple instead of whatever the caller would like the most). > Only the callers would know how they want to adjust for negative bitpos. Oh, and if you do that, please change bitpos to unsigned HOST_WIDE_INT *.
