[Bug target/47949] Missed optimization for -Os using xchg instead of mov.

[roger at nextmovesoftware dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47949

Roger Sayle <roger at nextmovesoftware dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |roger at nextmovesoftware dot 
com
             Status|NEW                         |RESOLVED
   Target Milestone|---                         |13.0
         Resolution|---                         |FIXED

--- Comment #6 from Roger Sayle <roger at nextmovesoftware dot com> ---
This suggestion has now been implemented on mainline (when using -Oz).