[Bug middle-end/66881] Possibly inefficient std::atomic codegen on x86 for simple arithmetic

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66881

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Ville Voutilainen from comment #2)
> (In reply to H.J. Lu from comment #1)
> > Dup of PR 50677?
> 
> Well, this report has no volatiles in it, so perhaps not?

Can you change init_recog_no_volatile to try it out?