[llvm] [CostModel][X86] getShuffleCost - use processShuffleMasks to split SK_PermuteTwoSrc shuffles to legal types (PR #120599)

[Alexey Bataev via llvm-commits]

https://github.com/alexey-bataev approved this pull request.

LGTM, cheers

https://github.com/llvm/llvm-project/pull/120599