- Add intrinsics.objc_super()
- Emit objc_msgSendSuper2 calls when an objc method call is combined with objc_super(self)
- Fix objc_block return value ABI for large struct returns
- Fix objc_implement method wrappers bad ABI for large struct returns and indirect args
- Simplify parameter forwarding for objc_imlpement methods
- Add intrinsics.objc_instancetype to mimi Objective-C instancetype* returns
This facilitates returning the correct type on subclasses when calling mehtods
such as `alloc`, `init`, `retain`, etc.
- Refactor Objective-C class implementations generation so that hierarchies are properly initialized
- Better codegen for context passing with ivar-based autocontext
- Allow @superclass on imported objc-c objects
- Better codegen for block forwarding invoker, arguments are forwarded directly
The prior behavior was adjusting the tag size based on the alignment of
the types in the union, even when the union has a custom alignment
specified with `#align`. This changes the behavior so that a custom
alignment, if specified, takes precedence over the alignment of the
types.
Add support for handling generic types in LLVM backend
- Updated `lb_type_internal` to return a pointer type for unspecialized generics.
- Modified `write_type_to_canonical_string` to handle specialized generics without panicking.
- Enhanced `default_type` to return the default type of specialized generics when applicable.
`typeid` used to be a fancy index with extra metadata stored on it. Now it is direct hash of the type.
This is safe to do in practice since any possible collisions are checked at compile time AND the chances of having a 1% collision are around 1 in 600K (see the Birthday Paradox).
Therefore accessing a `^Type_Info` is now a hash table lookup with linear probing. The table is twice the size than necessary so prevent too much probing due to an overly dense hash table.
