-> Transpose(MaxPool($arg, $perm))

    (2) ... or it might have only layout dependent operands:

      Example: Mean(Transpose($arg, $reduction_dims))
                 -> Mean($arg, Transpose($reduction_dims))
  }];

  let methods = [
    InterfaceMethod<
      [{Returns indices of layout dependent arguments.}],
      "SmallVector<unsigned, 4>", "GetLayoutDependentArgs", (ins)
    >,