[Bug tree-optimization/88793] Document that __attribute__ ((cold)) is not equivalent to __builtin_except because of optimization for size

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88793

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #5)
> (In reply to Alexander Monakov from comment #3)
> > (-Os is not "minimize size at all costs").
> 
> Bug 88809 comment 1 says the exact opposite. 8-/

And the manual says:
It also performs further optimizations designed to reduce code size.

Also see the thread at:
https://gcc.gnu.org/ml/gcc/2017-08/msg00280.html