[Bug c/51562] Expression evaluation with commas seems incorrect in gcc 4.5.2, 4.4.4

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51562

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-15 
09:57:32 UTC ---
(x=1,x)+(x=2,x)

is invoking undefined behavior as there is no sequence point inbetween
the two assignments to x.