[NewGVN] Add the pass to PassRegistry.def.

We need to hook up here to get it working with the new PM.
Add a test while here (and remove a typo).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290350 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed