[Third try. Apparently the compressed dump was still too big to get through]

So I got fed up with trying to navigate gengtype maze of type_p,
pair_p and others and trying to figure out the difference between
GC_POINTED_TO and GC_USED and what is so "maybe" about
GC_MAYBE_POINTED_TO, thus I extended gengtype to dump its data
structures representing GCC data types and variables.

I wanted to attach an example dump it produced but it is about 350K
compressed and so it's too big for this mailing list.  It's not
perfect since I
did depth-first processing and the very first type goes very deep
indeed by pulling virtually all of the remaining types and taking
perhaps 80% of the output. However it is already much more usable and
greppable for looking into interesting types than trying to do the
same in GDB.

I will commit this to gc-improv branch shortly. I think this is
interesting enough to have on the trunk too and I will submit together
with some other patches from gc-improv in couple of weeks.

Any comments?

--
Laurynas



-- 
Laurynas