George Karpenkov 3a50a9fe74 [attributes] Extend os_returns_(not_?)_retained attributes to parameters ...

When applied to out-parameters, the attributes specify the expected lifetime of the written-into object.

Additionally, introduce OSReturnsRetainedOn(Non)Zero attributes, which
specify that an ownership transfer happens depending on a return code.

Differential Revision: https://reviews.llvm.org/D56292

llvm-svn: 350942

2019-01-11 18:02:08 +00:00

4.1 KiB

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