Lunderberg commented on issue #17175:
URL: https://github.com/apache/tvm/issues/17175#issuecomment-2259194413
> I'm baffled. Do we need to explicitly call the ``FuseTIR` transform before
compiling any model?
Looking at the specific example, it looks like there are two distinct `lv`
variables in the input. One is produced by `R.tensor_to_shape`, while the
other is produced by `R.call_pure_packed("vm.builtin.tensor_to_shape", ...)`.
When `FuseTIR` is called, it internally performs dead-code elimination to
remove any values that are no longer required after fusion, along with any
no-longer-used PrimFunc implementations. This has the side effect of removing
the call to `R.tensor_to_shape(x)`, as its output is entirely unused.
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