[all-commits] [llvm/llvm-project] 301fbf: [SCEV] Clarify the overflow precondition of comput...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 301fbf9b8115620480db851d091cbbb516cd983d
      https://github.com/llvm/llvm-project/commit/301fbf9b8115620480db851d091cbbb516cd983d
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2021-08-30 (Mon, 30 Aug 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/ScalarEvolution.h
    M llvm/test/Analysis/ScalarEvolution/max-trip-count.ll

  Log Message:
  -----------
  [SCEV] Clarify the overflow precondition of computeMaxBECountForLT [NFC]

And add a test case to illustrate that we do in fact produce the right result for the multiple exit case.  I have gotten myself confused at least three times when reading this code, so clarify to prevent future confusion.