[all-commits] [llvm/llvm-project] f96aa4: [SimpleLoopUnswitch] Always skip trivial select an...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f96aa493f0459d16a81e76c9d4f2915057cbcf7a
      https://github.com/llvm/llvm-project/commit/f96aa493f0459d16a81e76c9d4f2915057cbcf7a
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-05-26 (Thu, 26 May 2022)

  Changed paths:
    M llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
    M llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-trivial-select.ll

  Log Message:
  -----------
  [SimpleLoopUnswitch] Always skip trivial select and set condition.

When updating the branch instruction outside the loopduring non-trivial
 unswitching, always skip trivial selects and update the condition.

Otherwise we might create invalid IR, because the trivial select is
inside the loop, while the condition is outside the loop.

Fixes #55697.