Toy examples of pipeline descriptions with GCC's automata

[Paulo Matos]

Hi,

I need a representative toy example of a pipeline description to explain 
GCC's automata but I can't find or create one that's either too trivial 
(something I write down in 10 mins) or too complex (from GCCs sources).

Does anyone here have anything that they use to explain this or know of 
any slides/papers online with this kind of stuff?

Thanks.
-- 
PMatos