Oh, I think I see. It's an arithmetic trick to ensure that a dtype where bits<8
will still result in the nbytes-per-element to be 1 byte.
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In this implementation of `GetDataSize()`:
https://github.com/apache/tvm/blob/58716081637fdf21bdae44122086f1dbc35f7c35/include/tvm/runtime/ndarray.h#L316
there is this mysterious line:
```
size *= (arr.dtype.bits * arr.dtype.lanes + 7) / 8;
```
I was instead expecting the simpler:
```
size *=
