[PM] Add a collection of no-op analysis passes and switch the new pass
manager tests to use them and be significantly more comprehensive.

This, naturally, uncovered a bug where the CGSCC pass manager wasn't
printing analyses when they were run.

The only remaining core manipulator is I think an invalidate pass
similar to the require pass. That'll be next. =]

llvm-svn: 225240
4 files changed