[llvm] [BranchFolding] Fix assertion failure in HoistCommonCodeInSuccs (PR #141028)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Also cannot interpret the ARM very well. I just grabbed the reproducer from @mikaelholmen :D I can try to find an x86 reproducer that we can all read if needed but the test is just there to detect a crash regression quickly more than anything. (Thanks again for the reproducer)

https://github.com/llvm/llvm-project/pull/141028