[llvm] [IndVars] Invalidate stale SCEV exit condition values (PR #207897)

[Jaeuk Lee via llvm-commits]

skku970412 wrote:

I have read the LLVM AI Tool Use Policy, Code-Review Policy and Practices, and Developer Policy linked above. I used OpenAI Codex while preparing this PR, and I have noted that usage in the PR description. I reviewed the generated code and text, reproduced the issue locally, reduced the regression test, and ran the tests listed in the PR description before posting.

https://github.com/llvm/llvm-project/pull/207897