[all-commits] [llvm/llvm-project] 80e042: [Mem2Reg] Use poison for unreachable cases

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 80e0424b2ce9489bec73dbd3b920c4543a25feb1
      https://github.com/llvm/llvm-project/commit/80e0424b2ce9489bec73dbd3b920c4543a25feb1
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2021-06-21 (Mon, 21 Jun 2021)

  Changed paths:
    M llvm/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
    M llvm/test/Transforms/Mem2Reg/pr37632-unreachable-list-of-stores.ll

  Log Message:
  -----------
  [Mem2Reg] Use poison for unreachable cases

Use poison instead of undef for cases dealing with unreachable
code. This still leaves the more interesting case of "load from
uninitialized memory" as undef.