Build pytorch with cutlass

I just download pytorch 1.11.0 from here, I find out that lib/ and lib/ is compiled with cutlass, but AFAIK, cutlass is introduced to pytorch at 1.13.0, Why is this library compiled in advance?

How did you check it and which ops/functions do you see?

I use unzip to open the whl file, and get into lib directory, This is the command used:
strings | grep "cutlass"
I can see many cutlass interface and symbols.