Fix mistake in r190442.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190446 91177308-0d34-0410-b5e6-96231b3b80d8
Fix unused variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190448 91177308-0d34-0410-b5e6-96231b3b80d8
Fix another mistake in r190442.

Sorry about that; I'll try to be more careful about DEBUG mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190449 91177308-0d34-0410-b5e6-96231b3b80d8
Don't assert on invalid loop vectorization hint.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190450 91177308-0d34-0410-b5e6-96231b3b80d8