Rewrite rule from scf to cf #404
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function can have a return value even when we are talking about Python
functions, e.g when one write
```python
def foo(x: int):
pass
```
we can interpret this as assigning a value of `Method` to the variable
`foo`. This makes downstream analysis and codegen easier because now we
have a place to store what the function represents
weinbe58
commented
May 15, 2025
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this PR implements the rewrite rule from SCF to CF dialect.
This rule must be applied in a fixed point fashion and works by walking a ssacfg region looking for
scf.Forandscf.IfElse. when if finds these statements it inserts their body blocks and usescfto create the appropriate cfg for those statements. This only implements it for one level of nesting; hence, it should be applied in a fixed-point fashion.