[Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-02-03
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |4.9.3, 5.3.0, 6.0

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed, though I have no idea about the feasibility of the request.  It
might worth to add it to the list of Atomic Optimization Ideas on the Wiki:
https://gcc.gnu.org/wiki/Atomic/GCCMM/Optimizations