[llvm] [SCEV] Avoid erase+insert in constant folding (NFC) (PR #101642)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

It looks like there are some binary changes in the compile-time-tracker link http://llvm-compile-time-tracker.com/compare.php?from=85c5265feae82d8e26869adf4505b448b3a17534&to=67271fa74cb49ff958865bc56e3eea79a934bafc&stat=size-text which is unexpected? 

https://github.com/llvm/llvm-project/pull/101642