[llvm] [MachinePipeliner] Improve loop carried dependence analysis (PR #94185)

[Afanasyev Ivan via llvm-commits]

ivafanas wrote:

Hi @ytmukai,

The same `computeDelta` copy-paste implementation exists in `llvm/lib/CodeGen/ModuloSchedule.cpp`. I'm not 100% sure, but similar improvement might be required there.

https://github.com/llvm/llvm-project/blob/2871f6905257169f8a49b13289421a668bf24051/llvm/lib/CodeGen/ModuloSchedule.cpp#L928

https://github.com/llvm/llvm-project/pull/94185