Introduce the SIL instruction peer_method, which references a method
in the given class or one of its superclasses (but not a subclass). It
IRGen's to objc_msgSendSuper[Stret] (vs. super_method IRGen'ing to
objc_msgSendSuper[Stret]2 for superclass lookup).
Use peer_method for initializer delegation to a foreign initializer
(i.e., an init-family method written in Objective-C) to close the
safety loophole introduced by initializer delegation in r11965. The
loophole still exists, but can only be triggered from Objective-C.
Teach definite initialization that peer_method really isn't a use of
self.
Swift SVN r11992
This lowers to a call to a to-be-written swift_once runtime function and will be used for lazy global initialization. Having this be a builtin seemed appropriate to me given that:
- references to it will be implicitly emitted by SILGen for global initializers.
- there are restrictions on its correct use that are currently impossible to express in the language outside of the stdlib.
Swift SVN r10508
When we need a reference to protocol or protocol composition type metadata, ask for it through the runtime, instead of referencing statically-emitted protocol metadata.
Swift SVN r9871
Use objc_getProtocol to derive a reference to the Protocol* for each required conformance, then pass the array off to a to-be-written dynamicCastObjCProtocol(Un)?Conditional entry point that will do all of the conformsToProtocol checks.
Swift SVN r9397
In the metadata template fill function for generic classes with dependent layout, include a call to a (not yet implemented) runtime initClassMetadata function to lay out the class fields and initialize the field offset vector.
Swift SVN r9233
In the fill function for a generic struct metadata template, gather metadata for all of the field types, then invoke the runtime's new initStructMetadata function to initialize the field offset vector and vwtable.
Swift SVN r9123
Conditionalize dependencies on fixed layout in the init/assign/destroy implementations for single-payload unions, and use some to-be-written runtime entry points in the dynamic case. Provide an initializeValueWitnessTable implementation for dynamic single-payload union metadata.
Swift SVN r8319
The dynamic method branch queries for the ability of an object to
respond to a particular selector (with -respondsToSelector:) and
branches on the result.
Note that we can't actually check the resulting IR here until we
handle partial application on Objective-C methods
(<rdar://problem/14958980>).
Swift SVN r8081
