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swift-mirror/lib/SILOptimizer/Transforms/ARCCodeMotion.cpp
Erik Eckstein c3ef03fc37 ARCCodeMotion: add a small peephole optimization which removes adjacent retain/release pairs. 
This reduces phase ordering problems, because it eliminates the need for a ARCSequenceOpt (which also does this optimization).
2018-01-19 11:32:36 -08:00

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