This is necessary because the byte size of an ObjC class type is not reliably statically knowable (e.g. because superclasses sit deep in frameworks that we have no debug info for)
The lack of reliable size info is a problem when trying to freeze-dry an ObjC instance (not the pointer, the pointee)
This commit lays the foundation for having language runtimes help in figuring out byte sizes, and having ClangASTType ask for runtime help
No feature change as no runtime actually implements the logic, and nowhere is an ExecutionContext passed in yet
llvm-svn: 227274
- adds a new flag to mark ValueObjects as "synthetic children generated"
- vends new Create functions as part of the SyntheticChildrenFrontEnd that set the flag automatically
- moves synthetic child providers over to using these new functions
No visible feature change, but preparatory work for feature change
llvm-svn: 223819
Enrico Granata