[all-commits] [llvm/llvm-project] b2b2aa: [LoopUnswitch] Add some additional tests.

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b2b2aa1c607781a3343085900fa7462ee498c993
      https://github.com/llvm/llvm-project/commit/b2b2aa1c607781a3343085900fa7462ee498c993
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2021-01-26 (Tue, 26 Jan 2021)

  Changed paths:
    M llvm/test/Transforms/LoopUnswitch/partial-unswitch.ll

  Log Message:
  -----------
  [LoopUnswitch] Add some additional tests.

Add a few additional tests where partial unswitching is not really
profitable and should be avoided.


  Commit: 1272f16d14264939ad3e73c84acc28a63970bc06
      https://github.com/llvm/llvm-project/commit/1272f16d14264939ad3e73c84acc28a63970bc06
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2021-01-26 (Tue, 26 Jan 2021)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
    M llvm/test/Transforms/LoopUnswitch/partial-unswitch.ll

  Log Message:
  -----------
  [LoopUnswitch] Avoid partially unswitching too aggressively.

This patch adds additional checks to avoid partial unswitching
in cases where it won't be profitable, e.g. because the path directly
exits the loop anyways.


Compare: https://github.com/llvm/llvm-project/compare/110837fbf6a9...1272f16d1426