[llvm] [ValueTracking] Skip incoming values that are the same as the phi in `isGuaranteedNotToBeUndefOrPoison` (PR #130111)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

The change is fine, though I wouldn't really consider it a "fix" for the compile-time issue. What we normally do is to limit recursion when analyzing phis: https://github.com/llvm/llvm-project/blob/d998eed8aae7cd8d5d28266c9c21f903a100e532/llvm/lib/Analysis/ValueTracking.cpp#L1703-L1704 But we can do that as a followup, this patch is a strict improvement.

https://github.com/llvm/llvm-project/pull/130111