[llvm] SCEV: avoid conflating unknown TC with wrap (NFC) (PR #94162)

[Nikita Popov via llvm-commits]

nikic wrote:

The PR description (but especially the title) are confused. On wrap, the TC is treated as unknown, which is represented as a 0 value. There was no "conflation" here.

> Improvements are planned for future patches.

What improvements are you planning?

https://github.com/llvm/llvm-project/pull/94162