Fix Implicit Stencil Arguments

[philip-paul-mueller]

The issue affects an ICON stencil calculate_diagnostics_for_turbulence (model/atmosphere/diffusion/src/icon4py/model/atmosphere/diffusion/stencils/calculate_diagnostics_for_turbulence.py) which look as:

@field_operator
def _calculate_diagnostics_for_turbulence(
    div: Field[[CellDim, KDim], vpfloat],
    kh_c: Field[[CellDim, KDim], vpfloat],
    wgtfac_c: Field[[CellDim, KDim], vpfloat],
) -> tuple[Field[[CellDim, KDim], vpfloat], Field[[CellDim, KDim], vpfloat]]:
    ...
    return astype((div_ic_wp, hdef_ic_wp), vpfloat)


@program(grid_type=GridType.UNSTRUCTURED)
def calculate_diagnostics_for_turbulence(
    div: Field[[CellDim, KDim], vpfloat],
    kh_c: Field[[CellDim, KDim], vpfloat],
    wgtfac_c: Field[[CellDim, KDim], vpfloat],
    div_ic: Field[[CellDim, KDim], vpfloat],
    hdef_ic: Field[[CellDim, KDim], vpfloat],
):
    _calculate_diagnostics_for_turbulence(
    	div, kh_c, wgtfac_c,
    	out=(
    		div_ic[:, 1:],
    		hdef_ic[:, 1:]
    	)
    )

Baseline ITIR to SDFG translator uses itir.params to determine the input arguments.
However, instead of the expected 5 arguments (the fields) there are ten more, i.e. two for every field with the names __${FIELD_NAME}__size_{0, 1}.
I suspect that it is caused by the slicing of the output parameter, but I am not sure.
I looked through the tests and found similar, but they are all in cartesian, at least the only one I found.

Since these arguments are implicitly generated, the current DaCe backend fails to handle them.

[tehrengruber]

These arguments are always added unless there is an explicit domain keyword argument in the field operator call of the program. See here:

gt4py/src/gt4py/next/ffront/past_to_itir.py

Line 118 in d6dfd6f

if any("domain" not in body_entry.kwargs for body_entry in node.body):

They are used to specify the size of the output domain on itir level. Closing as this is not a GT4Py issue as discussed. Feel free to reopen.