Compiling Yolov3 with glow

Hello I am trying to compile Yolov3 from an ONNX Model file which is currently not possible since the glow does not support Slicing operations with a stepsize not equal to one.

The Yolov3 Model uses a Slicing operation with a stepsize of -1 and a backwards iteration over the tensor which should be equivalent to a simple one dimensional flip operation.
The ONNX Operator list does not support a Flip operation but the glow ONNX model Loader does could one not simply change the ONNX nodes from a negative Slice to a Flip to be able to compile the model?

Otherwise as far as I have seen from the Documentation, open Issues and the Code Base is that extending the support for Slicing operations is not to be trivially achieved?