Which subfield should TVM belongs to?

Sorry, it seem not very suitable for asking this question in the community, but I have no better choice.
I’d like to apply for PhD this fall. I have some experience about TVM and code generation, also I like to do research about TVM in future. So which subfield should I choose while applying?
Here are the candidate:
Algorithms/AI/Data Networking/ Machine Learning/Programming Languages/Systems/Architecture
Thanks!