http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53131
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-04-28 10:37:04 UTC --- (In reply to comment #2) > > > > Do the warnings indicate bugs or not? > > Yes. I checked the first ten. And what do the kernel people say? Do they want Wlogical-op enabled? > > There is also PR43772, which would be nice to fix before enabling this in > > -Wall > > or -Wextra. However, I don't even have any idea why we are warning there. > > Agreed, although I wouldn't regard one broken corner case as a show stopper. > Unfortunately, this corner case triggers in Emacs, so I guess it is not that uncommon. My intention is to try to fix it before touching the status of -Wlogical-op. This will make easier to convince GCC maintainers. However, I have a long list of other things I would like to fix firstm and very little free time, so if you (or anyone else) managed to find out why that bug triggers, it would help already a lot.