[wip][mlir][x86vector] Shuffle BF16 vector.contract output for Flat layout. #174590
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This patch shuffles the output of a
bf16typenon-vnnipackedvector.contractoperation (flatlayout). The output of the contraction operation is shuffle to match theflatlayout, before get stored in theaccmatrix.Following this transform schedule, the
vector.contractwill be lowered to one of the following operations:Bmatrix shuffled to compensate theflatlayout, orbf16packed operations (supported as part of this PR).