[PATCH] Split log links creation from flow.c

[Zdenek Dvorak]

Hello,

> > this is first part of an attempt to clean up flow.c a bit. It splits
> > log links creation out of it.
> 
> Why do we want to do this?  It seems natural to collect this
> information simultaneous with life info, since they're related.

-- TODO list in flow.c wanted that
-- log links are IMHO very little related to life info
-- they are part of mess in flow.c that basically prevents any sane
   attempt to rework it in more efficient fashion
-- they are computed exactly once; it makes little sense to slow down
   every liveness (re)computation pass due to them (this is a very weak
   argument, as except for checking one flag there is no slowdown...)
-- I dislike this kind of "I do everything" passes; it took me two days
   just to puzzle out what exactly is flow.c doing. I would eventually
   like to transform greatest part of flow.c into using much cleaner
   interface of df.c.

Zdenek