[llvm] [SimplifyCFG] Fold `switch(zext/sext(X))` into `switch(X)` (PR #76988)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> @dtcxzyw But won't that edge get eliminated by SimplifyCFG anyway?

Okay, I have got your point.


https://github.com/llvm/llvm-project/pull/76988