[PATCH] D136233: [WIP] Virtual loop unswitching

[Max Kazantsev via Phabricator via llvm-commits]

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Still need to write comments & clean up the code, so WIP. Based on https://discourse.llvm.org/t/rfc-inject-invariant-conditions-to-loops-to-enable-unswitching-and-constraint-elimination


https://reviews.llvm.org/D136233

Files:
  llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
  llvm/test/Transforms/SimpleLoopUnswitch/insert-invariant-conditions.ll

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