[Bug middle-end/102566] [i386] GCC should emit LOCK BTS for simple bit-test-and-set operations with std::atomic

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102566

--- Comment #25 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Thiago Macieira from comment #24)
> (In reply to H.J. Lu from comment #23)
> > I renamed the commit title.  The new v3 is the v6 + fixes.
> 
> Got it. Still no issues.

Can you get some performance improvement data on real workloads?