Since VectorizationReport will be part of the result of the analysis it
will be stored in a container. However, one of its members is a
raw_string_ostream which cannot be copy-constructed.
This makes the raw_string_ostream local to the << operator.
This is part of the patchset that converts LoopAccessAnalysis into an
actual analysis pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229620 91177308-0d34-0410-b5e6-96231b3b80d8