[llvm] [RISCV] Select and/or/xor with certain constants to Zbb ANDN/ORN/XNOR (PR #120221)

[Piotr Fusik via llvm-commits]

pfusik wrote:

> By default, LLVM will squash-merge, so can you pre-commit the new test file before landing this?

Do you mean create a new PR for the pre-commit test?

https://github.com/llvm/llvm-project/pull/120221