http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50268
--- Comment #11 from Marc Glisse <marc.glisse at normalesup dot org> 2011-09-02 10:59:46 UTC --- (In reply to comment #10) > (by the way, if you can see a neat enough way to improve _M_are_all_aux, you > are welcome to propose it! I'm definitely not an expert in this area, and when > I implemented it, I remember just quickly hacking something close to what we > have elsewhere, which I could easily convince myself was correct) all(), when it reaches the last chunk, checks (nbchunk-1)*chunksize+popcount(lastchunk)==size(). It seems to me that it should check instead lastchunk==mask (where mask is something like ~(~0UL<<extrabits), computed at compile-time). Because of the way things are implemented, it means the helper needs to take mask (or extrabits) as argument.
