[X86] Convert f32/f64 FANDN/FAND/FOR/FXOR to vector logic ops and...

[X86] Convert f32/f64 FANDN/FAND/FOR/FXOR to vector logic ops and scalar_to_vector/extract_vector_elts to reduce isel patterns.

Previously we did the equivalent operation in isel patterns with
COPY_TO_REGCLASS operations to transition. By inserting
scalar_to_vetors and extract_vector_elts before isel we can
allow each piece to be selected individually and accomplish the
same final result.

I ideally we'd use vector operations earlier in lowering/combine,
but that looks to be more difficult.

The scalar-fp-to-i64.ll changes are because we have a pattern for
using movlpd for store+extract_vector_elt. While an f64 store
uses movsd. The encoding sizes are the same.

llvm-svn: 362914