lixiaoquan commented on a change in pull request #5429:
URL: https://github.com/apache/incubator-tvm/pull/5429#discussion_r415261490



##########
File path: include/tvm/relay/op_attr_types.h
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@@ -81,10 +81,16 @@ using TOpIsStateful = bool;
  */
 using TNonComputational = bool;
 
+enum ShapeDependantKind {
+  kShapeDependantShape = 0,
+  kShapeDependantData = 1,
+  kShapeDependantBoth = 2,

Review comment:
       
https://github.com/apache/incubator-tvm/blob/6e1cd8256e461deca51e45e7aae33088e8f5b966/python/tvm/relay/op/_transform.py#L179
   This line uses a range() and I think it causes variable index.
   
   I tried to allocate a data shape tensor by tvm.te.placeholder(), but it 
can't be passed to tvm.lower() when this shape func is lowered.
   But data shape tensor allocated in this line will be stored in CachedNode 
object 
(https://github.com/apache/incubator-tvm/blob/2c1ca60ea38587401a20f11c5e64f452b79fa777/src/relay/backend/compile_engine.cc#L348)
   Please correct me if I missunderstood your suggestion about allocating a 
buffer.




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