http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51798
--- Comment #9 from Andrew Macleod <amacleod at redhat dot com> 2012-01-25 15:36:23 UTC --- (In reply to comment #8) > > At least at this point I'd feel much safer if libstdc++ used just acq_rel > > semantics for the all atomic_fetch_and_add places, instead of somewhere acq > > and > > somewhere rel semantics. > > Can we at least apply the ACQ_REL patch using the new atomic intrinsics? > Well, I thought that was implicit since I wasn't suggesting we change the __sync semantics, just the required libstdc++ bits. All that has to be done is replace the two __sync_fetch_and_add(...) with __atomic_fetch_add(.., __ATOMIC_ACQ_REL) in atomicity.h isn't it?
