Lunderberg opened a new pull request, #13217:
URL: https://github.com/apache/tvm/pull/13217
Previously, `RemoveNoOp` would remove statements that could be locally
analyzed as having no effect (e.g. `For` with empty loop extents). This commit
adds opt-in use of data-flow analysis to identify two types of statements that
are no-ops based on their context:
* Buffer stores that are overwritten without ever being read.
```python
buf[i] = 5 # Overwritten by next statement
buf[i] = 10
```
* Storing a value that is already known to be present.
```python
buf[0:16] = T.ramp(0, 16, 1)
buf[5] = 5 # Previous load already stored this value
```
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