[all-commits] [llvm/llvm-project] caafdf: [LV] Weaken spuriously strong assert in LoopVersio...

[Philip Reames via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: caafdf07bbccbe89219539e2b56043c2a98358f1
      https://github.com/llvm/llvm-project/commit/caafdf07bbccbe89219539e2b56043c2a98358f1
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2021-01-12 (Tue, 12 Jan 2021)

  Changed paths:
    M llvm/lib/Transforms/Utils/LoopVersioning.cpp

  Log Message:
  -----------
  [LV] Weaken spuriously strong assert in LoopVersioning

LoopVectorize uses some utilities on LoopVersioning, but doesn't actually use it for, you know, versioning.  As a result, the precondition LoopVersioning expects is too strong for this user.  At the moment, LoopVectorize supports any loop with a unique exit block, so check the same precondition here.

Really, the whole class structure here is a mess.  We should separate the actual versioning from the metadata updates, but that's a bigger problem.