minminsun opened a new pull request #6297:
URL: https://github.com/apache/incubator-tvm/pull/6297


   For full upstream plan, see [Ansor 
RFC](https://discuss.tvm.ai/t/rfc-ansor-an-auto-scheduler-for-tvm-autotvm-v2-0/7005/32).
   
   In this PR, we enable AutoScheduler to rewrite the layout of placeholders to 
best fit the loop nest of the candidate schedule to be applied on ComputeDAG.
   
   Note that the function in this PR is only for performance evaluation with 
layout rewrite. An end-to-end solution of layout rewrite requires close 
cooperation  with relay passes, which will be provided in future PRs.
   
   CC @merrymercy @jcf94 @FrozenGene @comaniac @tqchen 
   


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