tools for comparing ghc's debug outputs?

[Don Stewart]

claus.reinke:
> >>I seem to recall someone mentioning a tool for normalizing
> >>the output of things like -ddump-simpl to make diffs easier
> >>by reducing irrelevant differences due to gensym-generated
> >>names. Was that just wishful thinking, or does such a thing exist?-)
> >
> >I would also find such a tool very useful, but to the best of my
> >knowledge there's nothing out there yet.
> 
> Surprising - how do all of you optimization tuners manage without?

I use the ghc-core tool, and occasionally piping code into vimdiff,
particularly for assembly.

    http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ghc-core