[llvm-branch-commits] [RISC-V][RVY] Add support for compressed stack-pointer addition (PR #203598)

[Alexander Richardson via llvm-branch-commits]

arichardson wrote:

If we decide https://github.com/llvm/llvm-project/pull/203599 is a good approach this can be simplified to just use the same instruction and ByHwMode arguments.

https://github.com/llvm/llvm-project/pull/203598