MFC r259888:

MFC r259888:

Pull in r183971 from upstream llvm trunk:

  X86: cvtpi2ps is just an SSE instruction with MMX operands. It has no AVX
  equivalent.

  Give it the right register format so we can also emit it when AVX is enabled.

This should fix a "Cannot select: intrinsic %llvm.x86.sse.cvtpi2ps" fatal error
in clang while building the gnuradio port for amd64.

Reported by:	db

git-svn-id: svn://svn.freebsd.org/base/stable/10@259989 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f