[all-commits] [llvm/llvm-project] 0eda45: [SimpleLoopUnswitch] Don't non-trivially unswitch ...

[aeubanks via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0eda4547969e0f5c12af6b4e26afd34ff8c95015
      https://github.com/llvm/llvm-project/commit/0eda4547969e0f5c12af6b4e26afd34ff8c95015
  Author: Arthur Eubanks <aeubanks at google.com>
  Date:   2021-02-08 (Mon, 08 Feb 2021)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
    A llvm/test/Transforms/SimpleLoopUnswitch/not-safe-to-clone.ll

  Log Message:
  -----------
  [SimpleLoopUnswitch] Don't non-trivially unswitch loops that are unsafe to clone

Non-trivial unswitching can clone loops.

The legacy -loop-unswitch pass also checks for this.

Fixes PR49085.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D96288