Lot's of ICEs with Polyhedron and -ftree-vectorize with mainline

[Richard Guenther]

Has anyone gone through Polyhedron ICEs with -ftree-vectorize?  I see
aermod, air, doduc, linpk, mdbx, rnflow and test_fpu ICE on i686 and
additionally induct and tfft on x86_64.  (-O3 -ffast-math -funroll-loops
otherwise)

Richard.