pixops: Be smarter than gcc's optimizer
pixops: Be smarter than gcc's optimizer

gcc realizes that the overflow checks aren't necessary. Why not?

Well, if an int overflows, the behavior is undefined. And turning on
-fomit-instructions is valid behavior in an undefined situation.

Distrotech/gdk-pixbuf,Distrotech/gdk-pixbuf,Distrotech/gdk-pixbuf,GNOME/gdk-pixbuf,Distrotech/gdk-pixbuf,Distrotech/gdk-pixbuf,GNOME/gdk-pixbuf,GNOME/gdk-pixbuf,GNOME/gdk-pixbuf