[clang] [clang][RISCV] Introduce CodeGenModule::calcRISCVZicfilpFuncSigLabel() (PR #111661)

[Kito Cheng via cfe-commits]

https://github.com/kito-cheng commented:

I would suggest either put more thing to make this PR test-able or write a unittest for this.

https://github.com/llvm/llvm-project/pull/111661