comaniac opened a new pull request #7173:
URL: https://github.com/apache/tvm/pull/7173


   Discussion: https://discuss.tvm.apache.org/t/autoscheduler-and-vm/8750
   
   Remaining issues to auto-schedule PyTorch Mask R-CNN but not handled in this 
PR:
   
   1. There are still lots of extracted tasks only contain a shape_of op. This 
is because shape_of has TOpPattern kOpaque which is one target of 
auto_scheduler task extraction. The problem is other ops with this pattern may 
be tunable (e.g., softmax).
   2. Although the source tensor of shape_of in Mask R-CNN has dynamic shape 
(e.g., (Any, 28, 28)), it cannot be detected by checking I/O tensors, because 
it has no input tensors, and the shape of its output tensor is (3,) which is 
static.
   3. When extracting tasks for a NCHW model on x86, Conv2D NCHWc compute will 
be selected. However, we should provide the general NCHW compute to 
auto_scheduler for tuning.
   
   cc @merrymercy @masahi @jcf94 


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