[llvm] [CVP]: Fold `icmp eq X, C` to `trunc X to i1` if C=2k+1 and X in [2k, 2k+1] (PR #83829)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> With this fold, RISC-V can eliminate two instructions, while ARM can eliminate one instruction on the hot path.

Could you please provide the godbolt link?


https://github.com/llvm/llvm-project/pull/83829