[X86] Remove FMA4 scalar intrinsics. Use llvm.fma intrinsic instead.
The intrinsics can be implemented with a f32/f64 llvm.fma intrinsic and an insert into a zero vector.
There are a couple regressions here due to SelectionDAG not being able to pull an fneg through an extract_vector_elt. I'm not super worried about this though as InstCombine should be able to do it before we get to SelectionDAG.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336416 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed