Self-memcpy-elision and memcpy of constant byte to memset transforms don't care how many bytes you were trying to transfer. Sink that safety test after those transforms. Noticed by inspection.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200726 91177308-0d34-0410-b5e6-96231b3b80d8