Switch SimplifyCFG over to the TargetTransformInfo interface rather than
the ScalarTargetTransformInfo interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171617 91177308-0d34-0410-b5e6-96231b3b80d8
Switch the BB vectorizer from the VTTI interface to the simple TTI
interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171618 91177308-0d34-0410-b5e6-96231b3b80d8