[all-commits] [llvm/llvm-project] 1cc477: [SimplifyCFG] Add test for PR48778 (NFC)

[Nikita Popov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1cc477f030bdeb6de98c6bde89fa7850630def24
      https://github.com/llvm/llvm-project/commit/1cc477f030bdeb6de98c6bde89fa7850630def24
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2021-01-17 (Sun, 17 Jan 2021)

  Changed paths:
    A llvm/test/Transforms/SimplifyCFG/pr48778-sdiv-speculation.ll

  Log Message:
  -----------
  [SimplifyCFG] Add test for PR48778 (NFC)

The sdiv is incorrectly speculated.


  Commit: 4229b87ed36cf20b95b363393452aa4815e344e2
      https://github.com/llvm/llvm-project/commit/4229b87ed36cf20b95b363393452aa4815e344e2
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2021-01-17 (Sun, 17 Jan 2021)

  Changed paths:
    M llvm/lib/Analysis/ValueTracking.cpp
    M llvm/test/Transforms/SimplifyCFG/pr48778-sdiv-speculation.ll

  Log Message:
  -----------
  [ValueTracking] Fix isSafeToSpeculativelyExecute for sdiv (PR48778)

The != -1 check does not work correctly for all bitwidths. Use
isAllOnesValue() instead.


Compare: https://github.com/llvm/llvm-project/compare/9a7fb0848771...4229b87ed36c