When last we left this patch, the general consensus seemed to be that it needed 
to be cleaned up to enforce better separation of the one-time versus 
target-specific initialization parts during regular startup, and to use the same 
function for target initialization during startup as during subsequent calls for 
re-initialization to avoid bit-rot.  See, for instance, previous discussion here:

http://gcc.gnu.org/ml/gcc-patches/2007-07/msg00763.html
http://gcc.gnu.org/ml/gcc-patches/2007-07/msg00850.html

I've now done that rewrite.  This is the non-MIPS-specific part of the patch -- 
the MIPS-specific part, to implement selecting mips16/nomips16 on a per-function 
basis, is almost unchanged from the previous version, and I'll repost that in a 
separate message.  Besides the MIPS testing (both with and without 
-mflip-mips16), I also tried to bootstrap on i686, but that's been dying for me 
with some unrelated error while building libjava.  I did, however, verify that 
there are no regressions in the gcc testsuite on i686.

OK to commit now?  Or do I need to do another round of clean-up on it?

-Sandra