swift234

SILGen: Fixed leaked retain of lvalue get/set.
SILGenFunction::emitConstantRef was returning a retained reference to local closures, but SILGenLValue saves off the reference and retains it as needed, leading to an extra retain that was never cleaned up. Add a SILGenFunction::emitUnmanagedConstantRef that returns a local or global constant value without retaining a local constant.

Swift SVN r3439