Any sub-project in llvm to help with

Hello

I am a computer science undergraduate student. I am looking for programming project related to Compilers for my Bachelor’s thesis and I think llvm will be a good choice. Can someone please recommend me some project which might be useful for llvm community and requires around 4 months of 20 hours a week work? I have previously worked on llvm IR translation and Clang and have good knowledge of C++.

Thanks

Abhishek