[all-commits] [llvm/llvm-project] 040c60: Fix a miscompile introduced by 99203f2.

[Richard Smith via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 040c60d9b69e2ad570556f255a746929a4b10e82
      https://github.com/llvm/llvm-project/commit/040c60d9b69e2ad570556f255a746929a4b10e82
  Author: Richard Smith <richard at metafoo.co.uk>
  Date:   2021-03-25 (Thu, 25 Mar 2021)

  Changed paths:
    M llvm/lib/Analysis/LoopAccessAnalysis.cpp

  Log Message:
  -----------
  Fix a miscompile introduced by 99203f2.

getPointersDiff would previously round down the difference between two
pointers to a multiple of the element size of the pointee, which could
result in a pointer value being decreased a little.

Alexey Bataev has graciously agreed to add a testcase for this;
submitting the bugfix now to unblock.