[llvm] [SelectionDAG] Expand [US]CMP using arithmetic on boolean values instead of selects (PR #98774)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> but other targets may also start to use it if it provides for better codegen.

Can you add some tests on RISC-V?


https://github.com/llvm/llvm-project/pull/98774