[all-commits] [llvm/llvm-project] f1a9a8: [SCEV] Be robust against IR generated by simple-lo...

[Philip Reames via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f1a9a83232230e1c848a91270ebe0d4089f0a803
      https://github.com/llvm/llvm-project/commit/f1a9a83232230e1c848a91270ebe0d4089f0a803
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2019-11-21 (Thu, 21 Nov 2019)

  Changed paths:
    M llvm/lib/Analysis/ScalarEvolution.cpp
    M llvm/test/Analysis/ScalarEvolution/trip-count-andor.ll

  Log Message:
  -----------
  [SCEV] Be robust against IR generated by simple-loop-unswitch

Simple loop unswitch likes to leave around unsimplified and/or/xors. SCEV today bails out on these idioms which is unfortunate in general, and specifically for the unswitch interaction.

Differential Revision: https://reviews.llvm.org/D70459