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swift-mirror/lib/SILOptimizer/LoopTransforms/COWArrayOpt.cpp
Erik Eckstein c2a8c71191 SILOptimier: Fix a miscompile in COWArrayOpt. 
If a make_mutable operation is done conditionally in a loop, the hoisting of this operation can cause an over-release of the array buffer in some cases.

rdar://problem/48906146
2019-03-19 13:23:38 -07:00

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