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7ec67156b0
This is the first patch in a series of 3 patches which clean up how we create runtime function declarations in the ARC optimizer when they do not exist already in the IR. Currently we have a bunch of duplicated code in ObjCARCOpts, ObjCARCContract that does this. This patch refactors that code into a separate class called ARCRuntimeEntryPoints which lazily creates the declarations for said entrypoints. The next two patches will consist of the work of refactoring ObjCARCContract/ObjCARCOpts to use this new code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185740 91177308-0d34-0410-b5e6-96231b3b80d8
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