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b63fed3b97
object that manages a single run of this pass. This was already essentially how it worked. Within the run function, it would point members at *stack local* allocations that were only live for a single run. Instead, it seems much cleaner to have a utility object whose lifetime is clearly bounded by the run of the pass over the function and can use member variables in a more direct way. This also makes it easy to plumb the analyses used into it from the pass and will make it re-usable with the new pass manager. No functionality changed here, its just a refactoring. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227162 91177308-0d34-0410-b5e6-96231b3b80d8
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