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Commit 6dcd49bc authored by Duncan Sands's avatar Duncan Sands
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Simplify RecursivelyDeleteDeadPHINode. The only functionality change 

should be that if the phi is used by a side-effect free instruction with
no uses then the phi and the instruction now get zapped (checked by the
unittest).

llvm-svn: 126124
parent 5decec97
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