[all-commits] [llvm/llvm-project] 007c68: [mlir][xegpu] Add xegpu.lane_shuffle op (#210777)

[Jianhui Li via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 007c68420876af752e14e1c0e8bdab3a6a4058b0
      https://github.com/llvm/llvm-project/commit/007c68420876af752e14e1c0e8bdab3a6a4058b0
  Author: Jianhui Li <jian.hui.li at intel.com>
  Date:   2026-08-01 (Sat, 01 Aug 2026)

  Changed paths:
    M mlir/include/mlir/Dialect/XeGPU/IR/XeGPUAttrs.td
    M mlir/include/mlir/Dialect/XeGPU/IR/XeGPUOps.td
    M mlir/include/mlir/Dialect/XeGPU/IR/XeGPUTypes.td
    M mlir/lib/Dialect/XeGPU/IR/XeGPUOps.cpp
    A mlir/test/Dialect/XeGPU/canonicalize.mlir
    M mlir/test/Dialect/XeGPU/invalid.mlir
    M mlir/test/Dialect/XeGPU/ops.mlir

  Log Message:
  -----------
  [mlir][xegpu] Add xegpu.lane_shuffle op (#210777)

Add a lane-level XeGPU operation that re-distributes a subgroup's
fragments across its lanes without changing the element type.

The op takes a 1D vector — the fragment held by one lane — and returns a
fragment of the same type. A pack/unpack mode selects the direction:
viewing the subgroup as an S x N element grid (S = subgroup size, N =
elements per lane), pack moves element j of lane i from logical position
j*S + i to i*N + j, so a lane's elements end up at consecutive
positions; unpack is the reverse.
  
This implements xegpu.convert_layout semantics at the lane level when
lane_layout is unchanged but lane_data differs.
  
assisted-by-claude

---------

Co-authored-by: Claude Opus 4.8 <noreply at anthropic.com>



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