❓ [Question] Why is `torch.bfloat16` excluded from the `allowed_casts` set ?

[junstar92]

TensorRT/py/torch_tensorrt/dynamo/conversion/aten_ops_converters.py

Lines 1030 to 1037 in a662411

	allowed_casts = {
	torch.float,
	torch.int32,
	torch.int64,
	torch.bool,
	torch.int8,
	torch.float16,
	}

Is there a specific reason why torch.bfloat16 is not included in the allowed_casts set within the to_copy_dtype_validator function?

Plus, this causes graph partitioning when performing a aten.ops._to_copy operation to torch.bfloat16. I'm wondering if this could potentially impact performance.