[PATCH] D94893: [SimplifyCFG] Freeze the extra condition when optimizing to switch

[Juneyoung Lee via Phabricator via llvm-commits]

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As discussed in D93943 <https://reviews.llvm.org/D93943>, this patch fixes the UB issue by freezing the extra condition when optimizing
`if(extracond || X == C1 || X == C2 || ...) ` into `if(extracond) { switch(X) { .. } }`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94893

Files:
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/SimplifyCFG/switch_create-custom-dl.ll
  llvm/test/Transforms/SimplifyCFG/switch_create.ll
  llvm/test/Transforms/SimplifyCFG/switch_msan.ll

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