[PATCH] D139109: [LoopUnswitch] Perform loop unswitching on select instructions

[Sergei Kachkov via Phabricator via llvm-commits]

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Try to convert select instruction with loop-invariant condition into
control-flow equivalent (if-then branch and phi node) and unswitch
this branch. This unswitching is always non-trivial since the successors
of created branch are not loop exits, so it requires cloning of loop.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139109

Files:
  llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
  llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch.ll

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