[all-commits] [llvm/llvm-project] 9c1662: Clarify comments on recurrence matcher [NFC]

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9c16621c0d4fccfa77b279f3b016b785d75b3989
      https://github.com/llvm/llvm-project/commit/9c16621c0d4fccfa77b279f3b016b785d75b3989
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/ValueTracking.h

  Log Message:
  -----------
  Clarify comments on recurrence matcher [NFC]

Triggered by discussion on D98222.  The case where we have a loop variant step is suprising, and doesn't match the behavior of SCEV's recurrences.  As such, make sure we call that out explicitly.