Re: if (unlikely(...)) == unnecessary?

[Davide Libenzi]

On Wed, 28 Jan 2009, Chris Snook wrote:

> Davide Libenzi wrote:
> > I noticed that GCC >= 3.3 (not tried the ones before) automatically branches
> > out the "if" code (and follow-through the "else" code, if there). Is that a
> > coincidence or a rule we can rely on going forward?
> 
> That's the default behavior, but there are lots of things that can cause it to
> behave differently.

Please don't keep me hanging. What are they (just a few of the "lots" 
that makes GCC follow-through "if" code)?


- Davide


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