[PATCH] D104203: [LoopUnroll] Fold all exits based on known trip count/multiple

[Nikita Popov via Phabricator via llvm-commits]

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Fold all exits based on known trip count/multiple information from SCEV. Previously only the latch exit or the single exit were folded.

This doesn't yet eliminate ULO.TripCount and ULO.TripMultiple entirely: They're still used to a) decide whether runtime unrolling should be performed and b) for ORE remarks. However, the core unrolling logic is independent of them now.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104203

Files:
  llvm/lib/Transforms/Utils/LoopUnroll.cpp
  llvm/test/Transforms/LoopUnroll/multiple-exits.ll
  llvm/test/Transforms/LoopUnroll/nonlatchcondbr.ll

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