Hzfengsy opened a new pull request #8354:
URL: https://github.com/apache/tvm/pull/8354


   This PR enables meta_programming for TVM Functions (usually used for 
TVMScript), which is useful to define only one function(TVMScript) but used in 
different shapes.
   
   Example:
   Mate fucntion
   ```Python
   @tvm.script.tir
   def mem_copy(a: ty.handle, b: ty.handle, m: ty.int32, n: ty.int32) -> None:
       A = tir.match_buffer(a, (m, n), "float32")
       B = tir.match_buffer(b, (m, n), "float32")
   
       with tir.block([m, n], "") as [vi, vj]:
           B[vi, vj] = A[vi, vj]
   ```
   
   Instruction:
   ```Python
   a, _, m, n = mem_copy.params
   func = mem_copy.specialize({a: tir.decl_buffer((16, 16))})
   # or
   func = mem_copy.specialize({n: 16, m: 16})
   ```
   
   Specialized function:
   ```Python
   @tvm.script.tir
   def mem_copy_16_16(a: ty.handle, b: ty.handle) -> None:
       A = tir.match_buffer(a, (16, 16), "float32")
       B = tir.match_buffer(b, (16, 16), "float32")
   
       with tir.block([16, 16], "") as [vi, vj]:
           B[vi, vj] = A[vi, vj]
   ```
   
   cc @tqchen @junrushao1994 @MasterJH5574 @comaniac 


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