[PATCH] [ms-cxxabi] Elide dtor access checks for pass-by-val objects in callees

[Hans Wennborg]

  > Rather than threading a CheckDtorAccess bool through everywhere, I think you can inline a small portion of the body of FinalizeVarWithDestructor into CheckFunctionDefinition and skip the access check. Most of it is probably dead. That's what I did initially in http://llvm-reviews.chandlerc.com/D929.

  That just removes one level of threading though. We still need to thread it through MarkFunctionReferenced to suppress access checks for base class dtors etc. when defining an implicit destructor, and that's where the ugliness comes from :/

http://llvm-reviews.chandlerc.com/D2409