[PATCH] D125398: [ControlHeightReduction] Freeze condition when converting select to branch

[Nikita Popov via Phabricator via llvm-commits]

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While select conditions can be poison, branch on poison is immediate UB. As such, we need to freeze the condition when converting a select into a branch.


https://reviews.llvm.org/D125398

Files:
  llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp
  llvm/test/Transforms/PGOProfile/chr.ll

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