[PATCH] D145008: [ControlHeightReduction] Don't combine a "poison" branch

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/Transforms/Instrumentation/ControlHeightReduction.cpp:1966
+  // Freeze potentially poisonous conditions.
+  if (!isGuaranteedNotToBeUndefOrPoison(Cond))
     Cond = IRB.CreateFreeze(Cond);
----------------
Is it possible to detect the case where a swap occurred, or is this too complicated?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145008/new/

https://reviews.llvm.org/D145008