[Bug middle-end/31531] A microoptimization of isnegative of signed integer

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31531

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-02-13 
06:30:29 UTC ---
I have a full patch now which also handles PR 14792 once that folding is
included in fold.