[llvm] [X86] Use X86FixupInstTunings to select between (V)MOVSS/D and (V)BLENDPS/D (PR #143312)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

It looks like these are still failing - please can you regenerate them?
    LLVM :: CodeGen/X86/vec-strict-fptoint-128-fp16.ll
    LLVM :: CodeGen/X86/vector-shuffle-256-v8.ll


https://github.com/llvm/llvm-project/pull/143312