leandron commented on issue #8783:
URL: https://github.com/apache/tvm/issues/8783#issuecomment-901008313


   Hi @bhahn221. I had a look into this issue and it seems like some similar 
issues we've seen in past with `tvmc compile --target=c`. 
   
   Based on the error message, it looks like we need to create a way to disable 
the vectorizer when using the C backend in this case? This is currently 
available via the `--pass-config`, *only* in `tvmc compile`.
   
   
https://github.com/apache/tvm/blob/e7748aac40bd4c263882323393ea8896837614a9/python/tvm/driver/tvmc/compiler.py#L86-L93
   
   To do that in `tvmc tune`, my first impulse would be plumbing a similar 
`--pass-config` option, all the way from `tvmc tune` () to 
`call_all_topic_funcs` in `tvm/auto_scheduler/relay_integration.py`:
   
   
https://github.com/apache/tvm/blob/e7748aac40bd4c263882323393ea8896837614a9/python/tvm/auto_scheduler/relay_integration.py#L59-L66
   
   I couldn't find the autotvm equivalent, on where the `PassContext` is 
actually called, but for now, in summary you would need to patch TVM to disable 
the vectorizer in the sources.


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