yzhliu edited a comment on issue #4765: [tir] make IterVar extends Var URL: https://github.com/apache/incubator-tvm/pull/4765#issuecomment-578281104 @tqchen another problem is currently we rely on `IterVar->var` to propagate variables from the very beginning, e.g., ``` rv = tvm.reduce_axis(...) Y = sum(X[rv], axis=rv) ``` However, `rv` could be replaced during the pass, it cause problem when we use the original `rv` to access array one example of replacing: https://github.com/apache/incubator-tvm/blob/master/src/tir/ir/expr_functor.cc#L206-L208 rethink about the scenario, I feel it is actually not a bad idea to have `Var` as a member of `IterVar`, it simplifies the problem.
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