[PATCH] D73285: [OpenMP][OMPIRBuilder][BugFix] Handle Unreachable Finalization blocks in `parallel` generation

[Fady Ghanim via Phabricator via llvm-commits]

fghanim created this revision.
fghanim added a reviewer: jdoerfert.
Herald added subscribers: llvm-commits, cfe-commits, guansong, hiraditya.
Herald added projects: clang, LLVM.

In some situations (e.g. `while(1);` ) the body block(s) will not contain a branch to the finalization block.
In this patch, `CreateParallel` has been modified to check if the `PRegPreFiniBB` is reachable before
generating finalization code. If not, will remove all unreachable blocks.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D73285

Files:
  clang/lib/CodeGen/CGStmtOpenMP.cpp
  llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp

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