Also remove logic in LateVectorize

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188285 91177308-0d34-0410-b5e6-96231b3b80d8
ARMv8: SWP and SWPB are obsoleted on ARMv8.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188288 91177308-0d34-0410-b5e6-96231b3b80d8
dfsan: fix lint warnings


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188293 91177308-0d34-0410-b5e6-96231b3b80d8