http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59194
--- Comment #6 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> --- (In reply to Jakub Jelinek from comment #4) > I bet tsan complains because the load is > not atomic, but does it really matter? If we read garbage there, compare > and swap will fail and next time we'll have hopefully correct value already > from what compare and swap said was the previous value. Actually, I believe this might fail. If the garbage read happens to be equal to what a 3rd thread writes in the meanwhile (admittedly, small change), the compare and swap will succeed and not fail.
