[llvm] [RISCV][WIP] Let RA do the CSR saves. (PR #90819)

[Mikhail Gudim via llvm-commits]

mgudim wrote:

@michaelmaitland thank you for the review! I wanted this branch to be just a proof of concept, so others can see the full context for the subsequent smaller PRs, I will address your comments there.



https://github.com/llvm/llvm-project/pull/90819