[Bug target/55803] SSE2 double negation less efficient than explicit xor

[roger at nextmovesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55803

Roger Sayle <roger at nextmovesoftware dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
                 CC|                            |roger at nextmovesoftware dot com
             Status|NEW                         |RESOLVED
      Known to work|                            |6.0

--- Comment #4 from Roger Sayle <roger at nextmovesoftware dot com> ---
Since GCC 6.1, functions f and g generate identical code on x86_64 (with both
-Os and -O2).