The old PM sets the options of what used to be known as "latesimplifycfg" on the
instantiation after the vectorizers have run, so that's what we'redoing here.
FWIW, there's a later SimplifyCFGPass instantiation in both PMs where we do not
set the "late" options. I'm not sure if that's intentional or not.
Differential Revision: https://reviews.llvm.org/D39407
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316869 91177308-0d34-0410-b5e6-96231b3b80d8