[PATCH] D47552: [Power9] Implement float128 parameter passing by value

[Nemanja Ivanovic via Phabricator via llvm-commits]

nemanjai added a comment.

A couple of notes:

- This doesn't just handle parameters, but return values as well
- I think all of these will require predication for `P9Vector` since we don't want to change the `fp128` calling conventions on subtargets that don't support the type


https://reviews.llvm.org/D47552