add autowrap_functions kwarg to fx.Tracer (#62106)
Summary:
Implements feature request https://github.com/pytorch/pytorch/issues/62021
Test it out with
```python
from torch import fx
from torch import nn
def fx_int(x):
return int(x)
class MyModule(nn.Module):
def forward(self, x):
return fx_int(x.shape[0] / 2)
tracer = fx.Tracer(autowrap_functions=(fx_int,)) # or remove kwarg to demonstrate symbolic trace error
tracer.trace(MyModule())
```
First time contributor, so please advise if I could have done anything to make lives easier for next time.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62106
Reviewed By: SplitInfinity, driazati
Differential Revision: D30080834
Pulled By: jamesr66a
fbshipit-source-id: 68fadf8c881ea7930e7afd62b642874010fe4903
