[x86] lower calls to fmax and llvm.maxnum.* using maxps/maxpd (PR24475)

This is a follow-on to:
http://reviews.llvm.org/rL255700
http://reviews.llvm.org/rL256454



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256510 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed