[llvm] [VPlan] Narrow truncates of an induction plus a constant offset (PR #226035)

[Vedant Paranjape via llvm-commits]

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VedantParanjape wrote:

I don't really see a case where this might be profitable, mainly because if Start is technically unknown, so are all the intermediate values. So, adding in a constant won't save on cost.

https://github.com/llvm/llvm-project/pull/226035