[all-commits] [llvm/llvm-project] 2b5a89: Revert "[SimpleLoopUnswitch] Fix introduction of U...

[Juneyoung Lee via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 2b5a8976514de326bb84f0913d9d451089c11d22
      https://github.com/llvm/llvm-project/commit/2b5a8976514de326bb84f0913d9d451089c11d22
  Author: Juneyoung Lee <aqjune at gmail.com>
  Date:   2020-02-28 (Fri, 28 Feb 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
    M llvm/test/Transforms/SimpleLoopUnswitch/exponential-nontrivial-unswitch-nested.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/exponential-nontrivial-unswitch-nested2.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/exponential-switch-unswitch.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/guards.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-cost.ll
    M llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch.ll

  Log Message:
  -----------
  Revert "[SimpleLoopUnswitch] Fix introduction of UB when hoisted condition may be undef or poison"

.. due to performance regression.

This patch is reverted until infrastructore for CSE/LICM support for freeze is
added.

This reverts commit 181628b