🐛 [Bug] slice_op not able to handle start value with type trt.ITensor

[shahe-nv]

Bug Description

In py/torch_tensorrt/dynamo/conversion/impl/slice/ops.py, function slice_op, Line 112, it only considers the case when start is int, but not the case when start is trt.ITensor.

I tried to add support for start being trt.ITensor, however, I'm not able to run successfully because TRT requires the start being a shape tensor to be able to do shape inference but it seems start is not a shape tensor. Therefore, currently I'm only able to do a workaround by hard coding all the parameters of the slice layer.

To Reproduce

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Expected behavior

Environment

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Additional context