Lunderberg commented on issue #17245:
URL: https://github.com/apache/tvm/issues/17245#issuecomment-2271755931

   Hmm.  The PrimFunc definition is a bit odd.  The present of the `with 
T.block` means that it is schedulable TIR, but there aren't any `with T.block` 
annotations inside the loops themselves.  So the body looks like it is after 
the `ConvertBlocksToOpaque` transform, but `DefaultGPUSchedule` requires the 
annotations from before that.
   
   The reason why it works when the dead function is removed is because 
`DefaultGPUSchedule` attempts to schedule all TIR functions, regardless of 
whether they are actually used.


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