[Question] While tile input_arg and input_accum can be add together while the shape not match


```
%input = constant <f32: 0.0> : tile<8xf32>
%0 = reduce %input dim=0 identities=[0.000000e+0 : f32] : tile<8xf32> -> tile<f32>
  (%input_arg: tile<2xf32>, %input_accum: tile<f32>) {
    %add_result = addf %input_arg, %input_accum : tile<f32>
    yield %add_result : tile<f32>
  }
```

doc fromm addf
lhs, rhs and result must have the same shape and element type