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c292caf55c
loop exit edge -- new PHIs may be needed not only for the additional splits that are made to preserve LoopSimplify form, but also for the original split. Factor out the code that inserts new PHIs so that it can be used for both. Remove LoopRotation.cpp's code for manually updating LCSSA form, as it is now redundant. This fixes PR4934. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81363 91177308-0d34-0410-b5e6-96231b3b80d8
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