junrushao opened a new pull request, #14207:
URL: https://github.com/apache/tvm/pull/14207
As the legacy behavior of previous generation of TVMScript printer, LetStmt
and Let expression in TIR are printed in the same syntax, i.e. `T.let`. This
could be confusing and misleading at times.
This PR introduces a new printer behavior in a backward compatible way.
While ensuring all legacy `T.let` can be parsed properly, we introduce
different syntax for each of them.
For LetStmt in TIR without concise scoping, the new syntax is:
```python
with T.LetStmt(value) as var:
...
```
which was:
```python
var = T.int32()
with T.let(var, value):
...
```
For let expression in TIR PrimExpr, the new syntax becomes:
```python
x = T.int32()
T.Let(x + 1, where={x : 1})
```
which was:
```python
x = T.int32()
T.let(x, 1, x + 1)
```
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