capture analysis is gone. This functionality is subsumed by SIL passes,
which turn boxes into stack allocations.
One minor detail of this is that dealloc_ref isn't implemented yet in IRGen
(rdar://14648382) and SILGen produces it for destructors (e.g. see
test/SILGen/lifetime.swift). To unblock progress, I just removed the
llvm_unreachable in IRGen.
Swift SVN r6890
Have project_existential return $*This instead of $Builtin.OpaquePointer, and have protocol_method do the same for methods of opaque protocols. This makes it easier for passes to reason about the semantics of the projected address, since it's restricted by the semantics of SIL addresses.
Swift SVN r6872
We haven't fully updated references to union cases, and enums still are not
their own thing yet, but "oneof" is gone. Long live "union"!
Swift SVN r6783
"SILConstant" doesn't really describe its role in SIL anymore, which is to provide a reference to a Swift declaration in a SIL instruction, such as a method or nominal type field.
Swift SVN r6559
These still need to be serialized, because they are one-to-one with the
type's protocol list, but don't actually require any data. Found on
attempting to emit a module for the standard library.
Most of the churn here is moving Interleave.h to a more general STLExtras.h.
Swift SVN r6167
their types.
- DebugTypeInfo holds all type info we need to emit debug information.
- Type info is limited to name, location, and storage size.
- As a side-effect: verbose LLVM IR allocas in debug builds!
Swift SVN r5980
Until we get a proper dataflow pass to statically catch fall-off-the-end bugs, going into outer space is an awful UX for our library writers. Insert an llvm.trap() call when we emit SIL "unreachable" instructions.
Swift SVN r5953
and lexical scopes, which can be enabled through the new -g option.
When -g is enabled, line tables and scopes compile all the way
down to DWARF.
Changes to SIL:
- In addition to a SILLocation, every instruction now also has a pointer
to a SILDebugScope (its containing lexical scope).
- Added LexicalScope, which is to be used for all Scopes we want to show
up in the debug info.
Swift SVN r5772
Improve our representations of casts in the AST and SIL so that 'as!' and 'is' (and eventually 'as?') can share almost all of the same type-checking, SILGen, and IRGen code.
In the AST, we now represent 'as!' and 'is' as UnconditionalCheckedCastExpr and IsaExpr, respectively, with the semantic variations of cast (downcast, super-to-archetype, archetype-to-concrete, etc.) discriminated by an enum field. This keeps the user-visible syntactic and type behavior differences of the two forms cleanly separated for AST consumers.
At the SIL level, we transpose the representation so that the different cast semantics get their own instructions and the conditional/unconditional cast behavior is indicated by an enum, making it easy for IRGen to discriminate the different code paths for the different semantics. We also add an 'IsNonnull' instruction to cover the conditional-cast-result-to-boolean conversion common to all the forms of 'is'.
The upshot of all this is that 'x is T' now works for all the new archetype and existential cast forms supported by 'as!'.
Swift SVN r5737
Use the new swift_dynamicCastIndirect runtime functions to implement casts from opaque archetype and existential types to concrete types.
Swift SVN r5684
Just refer to "class archetypes" and "class protocols". Change 'isClassBounded' methods to 'requiresClass', which is a character shorter.
Swift SVN r5674
Treat archetypes with a superclass bound as class-bounded. Change SILGen and IRGen to use the new SuperToArchetypeRef and ArchetypeRefToSuper cast instructions, and drop the old SuperToArchetype and ArchetypeToSuper instructions, which are unneeded because any archetype with a superclass will be class-bounded.
Note that this patch doesn't implement representation optimization for archetypes with superclass bounds--they're still always represented with a worst-case UnknownRefCountedPtrTy.
Swift SVN r5629
Provide a lowering for the DeinitExistential instruction to deallocate the buffer in an existential container with an uninitialized value, using its deallocateBuffer witness.
Swift SVN r5623
Emit ObjC method dispatch for ObjC method calls. This should get calls to generics bound by ObjC protocols working; ObjC existentials still need their representation tweaked not to include witness table pointers.
Swift SVN r5600
Provide TypeInfo for class-bounded existentials, which represents them as an explosion comprising one witness table per subscribed protocol and then the class instance pointer as an ObjC-refcounted pointer. Provide lowerings for the SIL instructions that manipulate class-bounded existentials (except for existential-to-existential erasures, which aren't critical to getting basic operations working and will need some abstraction remapping to deal with class-bounded-to-opaque upcasts aside from the representation change).
Swift SVN r5579
