Lunderberg commented on PR #15916:
URL: https://github.com/apache/tvm/pull/15916#issuecomment-1783586454

   > My concerns were addressed, but we should have agreement on the design 
question @tqchen posed before we merge (if we will merge).
   
   Oh, absolutely.  The comment was to ensure that we had a clean 
implementation for the design comparison.
   
   >  I'm not sure what form this should take, but such special cases make it 
trickier to implement passes like common subexpression elimination: the passes 
have to know about which operators are special and have special handling for 
them
   
   Thank you for this phrasing, as I was trying to put this sentiment into 
words.  The existence of special requirements that must be preserved makes 
generic implementations of other passes be much more difficult.


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