[PATCH] D60783: [LoopPred] Implement a version of the profitability heuristic w/o BPI

[Philip Reames via Phabricator via llvm-commits]

reames created this revision.
reames added reviewers: apilipenko, fedor.sergeev, skatkov.
Herald added subscribers: bollu, mcrosier.
Herald added a project: LLVM.

In the new pass manager, getting access to BPI reliability is a challenge.  In practice, we've been running downstream with a variation of this non-BPI based heuristic.

(I also have some patches I'll post shortly to improve invalidation, but I'm not sure I can push that all the way through yet.)

Original patch by: Anna Thomas (with heavy modification by me)


Repository:
  rL LLVM

https://reviews.llvm.org/D60783

Files:
  lib/Transforms/Scalar/LoopPredication.cpp
  test/Transforms/LoopPredication/profitability.ll

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