[Bug c/48793] Optimization -O2 Incorrectly Removes Logic

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48793

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-04-27 
22:59:51 UTC ---
(In reply to comment #2)
> myInteger = -myInteger;
> 
> is undefined for the integer MIN_INT?

The above is undefined for the value of MIN_INT.  As there is an overflow as
-MIN_INT is not representable in the type int.