[Bug middle-end/47566] ICE in vn_reference_lookup

[Joost.VandeVondele at pci dot uzh.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47566

--- Comment #8 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-02-01 14:53:44 UTC ---
(In reply to comment #7)
> Hm, you are using -O0 for the compile and -O3 ... for the link step?  Should
> work in theory, but of course isn't tested thoroughly.

Right :-) I'm trying to test this thoroughly... 

seems like a useful trick to speedup parallel builds of Fortran programs (quick
-O0 build to satisfy module dependencies, massively parallel and thus hopefully
fast lto without the dependencies).