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Posted to commits@tvm.apache.org by GitBox <gi...@apache.org> on 2021/11/18 02:39:41 UTC

[GitHub] [tvm] wrongtest commented on pull request #9482: Implementation of Common Subexpression Elimination for TIR

wrongtest commented on pull request #9482:
URL: https://github.com/apache/tvm/pull/9482#issuecomment-972463175


   Hi @FranckQC, I am also very interested in the CSE pass. In our circumstances we suffer from duplicate index computations produced by loop unroll, like
   ```
   A[i*256 + j*16 + 0] = B[i*256 + j*16 + 4096]
   A[i*256 + j*16 + 1] = B[i*256 + j*16 + 4097]
   ...
   ```
   We have to depend on target backend optimize abilities which may or maynot optimize them out. It would be great if CSE can handle part of these things in TIR level.


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