Richard Smith e97654b2f2 Handle scoped_lockable objects being returned by value in C++17. ...

In C++17, guaranteed copy elision means that there isn't necessarily a
constructor call when a local variable is initialized by a function call that
returns a scoped_lockable by value. In order to model the effects of
initializing a local variable with a function call returning a scoped_lockable,
pretend that the move constructor was invoked within the caller at the point of
return.

llvm-svn: 322316

2018-01-11 22:13:57 +00:00

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