This PR fixes partial TFLite frontend support for dynamic `FILL` and
`SPLIT_V`.
Key changes:
- Allow `FILL` to accept runtime `dims` tensors by converting them with
`relax.op.tensor_to_shape` before calling `relax.op.full`.
- Allow `SPLIT_V` to accept runtime `size_splits` tensors by decomposing
the
op into `cumsum` and `dynamic_strided_slice`.
- Use the TFLite output tuple arity as the source of truth for dynamic
`SPLIT_V`, instead of relying on `size_splits` static shape information.
- Add TFLite frontend regression tests covering dynamic `FILL` import
and
dynamic `SPLIT_V` import/compile behavior.
This addresses the `FILL` and `SPLIT_V` items under the "Fix partial
implementations" section of #19412.
Validation:
```bash
python -m ruff check python/tvm/relax/frontend/tflite/tflite_frontend.py tests/python/relax/test_frontend_tflite.py
```
```bash
python -m pytest tests/python/relax/test_frontend_tflite.py \
-k "split_v_dynamic or fill_dynamic_dims" -v
```
Result:
- All checks passed
HoYi
ccd81f220f