[PATCH] D103424: [IndVars] Don't forget value when inferring nowrap flags

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

I think i can take a look into doing this inferrence early, but thinking about it,
looks like it would be best to do that after this patch.

I do think this is *not* NFC, but i do think we can solve this more generically,
and even if we can't, the current situation does not seem reasonable.

This reduces runtime of n=512 case from https://bugs.llvm.org/show_bug.cgi?id=50384
from ~7.1s to 0.8s, i.e. an order of magnitude improvement.
I'm not sure if this actually resolves quadratic runtime problem,
it actually might, but it at least *severely* reduces it's impact.

So LGTM.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D103424/new/

https://reviews.llvm.org/D103424