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![Evgeniy Stepanov](/assets/img/avatar_default.png)
Check whether a BB is known as reachable before adding it to the worklist. This way BB's with multiple predecessors are added to the list no more than once. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170335 91177308-0d34-0410-b5e6-96231b3b80d8