[all-commits] [llvm/llvm-project] 49995b: [MLIR][GPU] subgroup_mma fp64 extension (#165873)

[Giacomo Castiglioni via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 49995b2af0abbec1095031dfe9eb049945b6d4f7
      https://github.com/llvm/llvm-project/commit/49995b2af0abbec1095031dfe9eb049945b6d4f7
  Author: Giacomo Castiglioni <giacastiglioni at gmail.com>
  Date:   2025-11-21 (Fri, 21 Nov 2025)

  Changed paths:
    M mlir/include/mlir/Conversion/GPUToNVVM/GPUToNVVMPass.h
    M mlir/include/mlir/Dialect/GPU/IR/GPUBase.td
    M mlir/include/mlir/Dialect/GPU/IR/GPUOps.td
    M mlir/lib/Conversion/GPUToNVVM/WmmaOpsToNvvm.cpp
    M mlir/lib/Dialect/GPU/IR/GPUDialect.cpp
    M mlir/test/Conversion/GPUToNVVM/wmma-ops-to-nvvm.mlir
    M mlir/test/Dialect/GPU/invalid.mlir
    A mlir/test/Integration/GPU/CUDA/TensorCore/wmma-matmul-f64.mlir

  Log Message:
  -----------
  [MLIR][GPU] subgroup_mma fp64 extension (#165873)

This PR extends the `gpu.subgroup_mma_*` ops to support fp64 type.
The extension requires special handling during the lowering to `nvvm`
due to the return type for load ops for fragment a and b (they return a
scalar instead of a struct).



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