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This will enable the main ObjCARCOpts dataflow to work with higher level concepts such as "can this ptr state be modified by this ref count" and not need to understand the nitty gritty details of how that is determined. This makes the dataflow cleaner. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231437 91177308-0d34-0410-b5e6-96231b3b80d8