--- Comment #9 from Jan Hubicka <hubicka at gcc dot> ---
The patch attached does the table cleaning that also removes "stale pointers".
It is bit hard what "stale" means here. Devirtualization is speculative and
works safely only if it sees whole program.  We see bit more of whole program
before we remove stuff that is not reachable in current TU, but practically it
is not a big ifference.

I tested the table rebuild patch. If you want me to implement table walking I
can do it too - only problem is that odr hash is local to ipa-devirt so I will
add walker function in there with a callback.

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