The Objective-C runtime executes the .cxx_destruct method after the
last -dealloc has executed when destroying an object, allowing the
instance variables to remain live even after the subclass's
destructor/-dealloc has executed, which is important for memory
safety. This fixes the majority of <rdar://problem/15136592>.
Note that IRGenModule::getAddrOfIVarDestroyer() contains an egregious
hack to find the ivar destructor SIL function via a linear
search. We need a better way to find SIL functions that we know exist,
because LinkEntity does not suffice.
Swift SVN r12206
SILDeclRef was previously storing the ClassDecl for this case, because
semantic analysis didn't guarantee that a DestructorDecl was always
present. It is now, and this representation makes more sense.
Swift SVN r12122
In general, this forces SILGen and IRGen code that's grabbing
a declaration to state whether it's doing so to define it.
Change SIL serialization to serialize the linkage of functions
and global variables, which means also serializing declarations.
Change the deserializer to use this stored linkage, even when
only deserializing a declaration, and to call a callback to
inform the client that it has deserialized a new entity.
Take advantage of that callback in the linking pass to alter
the deserialized linkage as appropriate for the fact that we
imported the declaration. This computation should really take
advantage of the relationship between modules, but currently
it does not.
Swift SVN r12090
Split 'destructive_switch_enum_addr' into separate 'switch_enum_addr' and 'take_enum_data_addr' instructions. This should unblock some optimization work we would like to do with enums.
Swift SVN r12015
Emphasize the fact that this address is only intended for initialization. When we split destructive_switch_enum_addr, there will be another similar instruction for destructively taking the payload out of an already-initialized enum.
Swift SVN r12000
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
Remove the initialize_var instruction now that DI fully diagnoses initialization problems. Change String-to-NSString bridging to explicitly invoke String's default constructor; it was the last remaining user of initialize_var. Remove dead code to emit an implicit default constructor without a body.
Swift SVN r11066
Existing uses use a "globalvar" kind. Add a new "rootinit" kind which
will be used for root initializers (i.e. init methods of structs, enums,
and root classes).
Swift SVN r10772
a FuncDecl. This makes it much more straight-forward for SIL passes to
introduce a new one - without doing name lookup in the builtin module!
Swift SVN r10694
(the same way alloc_box returns two) instead of returning a tuple.
This eliminates a ton of tuple_extract instructions, which just
bloat the generated SIL. This resolves rdar://15378135.
Swift SVN r10416
I tried hard find all references to 'func' in documentation, comments and
diagnostics, but I am sure that I missed a few. If you find something, please
let me know.
rdar://15346654
Swift SVN r9886
Doug pointed out that 'isObjC' incorrectly excludes C functions, for which we'll also need to be able to independently reference Swift and foreign entries.
Swift SVN r8669
This mirrors the behavior of project_existential and simplifies some special cases in SILGen. It unfortunately makes dynamic_lookup sequences a bit noisier because of the need to explicitly cast the projection from DynamicLookup.Self to Builtin.ObjCPointer, but I think this modeling is more solid and will fit better with my planned redesign of archetype_method/protocol_method.
Swift SVN r8572
