swift

139de11b - [cast-opt] Eliminate a leak along the cast failure path when bridging from a swift to ns object derived class.

[cast-opt] Eliminate a leak along the cast failure path when bridging from a swift to ns object derived class. I added an interpreter test that exercises this code path using LifetimeTracked to make sure we do not regress again. rdar://49882071 (cherry picked from commit de021aa32b286cac6cae0c2ce53ce1e444eb9707) Conflicts: lib/SILOptimizer/Utils/CastOptimizer.cpp