https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58306
--- Comment #19 from Artem S. Tashkinov <t.artem at mailcity dot com> --- (In reply to Martin Liška from comment #18) > Ok, problem is that various value profilers are not updated atomically, > fixed in: > https://gcc.gnu.org/ml/gcc-patches/2016-08/msg00600.html Thank you! Do I understand the patch correctly that it requires "-fprofile-update=atomic" option in order to eliminate this bug?