100x -O0 Compile Time Regression {3.2,3.3} -> {3.4,3.5}

[Jan Hubicka]

> This looks like you get a lot of swapping.  I have patch to get some
> statistics about who is allocating the memory, so please just forward
> preprocessed file to my address and i will try it out, perhaps I will be
> lucky :)
OK, 50% of memory seems to be consumed here:

cp/name-lookup.c:2800 (push_class_level_binding)                7273413 145468260          0:47.911%      21740:0.064%

Mark, perhaps you know better than I do how to put this beast on the diet?
Next major consumer is scheduler doing log-links (12%).  I have patch for this
one in queue already.

Honza