tqchen opened a new pull request, #20462:
URL: https://github.com/apache/tvm/pull/20462

   ## Summary
   
   DataType values can be ordinary operation arguments, but their type and 
TVMScript spelling currently live in Relax. This PR moves AnyType to the root 
IR layer and shares DataType-valued constant construction and printing across 
dialects.
   
   - Define `AnyType` in the root IR type layer as `ir.AnyType`; Relax keeps 
its `AnyType`/`ObjectType` aliases and `R.Any`, and JSON using the former 
`relax.AnyType` key is upgraded on load.
   - Expose `dtype` as an ordinary shared builder call constructing a 
`GenericConst` typed by `AnyType`; DataType values print as `T.dtype(...)` 
(including inside Relax functions) and `I.dtype(...)` in shared IR module 
contexts, while `R.dtype` remains accepted when parsing.
   - Treat generic constants as leaves in TIR path traversal so DataType values 
can appear in operation arguments.
   


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