Frank Schlimbach 586c5e3083
[mlir][mpi] fixing in-place and 0d mpi.all_reduce (#134225)
* inplace allreduce needs special MPI token MPI_IN_PLACE as send buffer
* 0d tensors have no sizes/strides in LLVM memref struct
2025-04-03 15:53:40 +02:00
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