This attribute instructs the compiler that this function declaration
should be "import"ed from host environment. It's equivalent of Clang's
`__attribute__((import_module("module"), import_name("field")))`
Currently, when compiling with no optimizations on, we still delete
functions that are sometimes used in the debugger. For example, users
might want to call functions which are unused, or compiler generated
setters/getters.
rdar://101046198
This attribute instructs the compiler that this function declaration
should be "export"ed from this .wasm module. It's equivalent of Clang's
`__attribute__((export_name("name")))`
Currently, when compiling with no optimizations on, we still delete
functions that are sometimes used in the debugger. For example, users
might want to call functions which are unused, or compiler generated
setters/getters.
rdar://101046198
- VTableSpecializer, a new pass that synthesizes a new vtable per each observed concrete type used
- Don't use full type metadata refs in embedded Swift
- Lazily emit specialized class metadata (LazySpecializedClassMetadata) in IRGen
- Don't emit regular class metadata for a class decl if it's generic (only emit the specialized metadata)
- In embedded Swift, classes get a simplified metadata: Basically just a vtable + destructor + superclass pointer.
- Only non-resilient (intended as permanent restriction), non-generic classes (for now) supported.
- Relax the check that prohibits metadata emission and usage to allow classes.
- Add a flag to the serialized module (IsEmbeddedSwiftModule)
- Check on import that the mode matches (don't allow importing non-embedded module in embedded mode and vice versa)
- Drop TBD support, it's not expected to work in embedded Swift for now
- Drop auto-linking backdeploy libraries, it's not expected to backdeploy embedded Swift for now
- Drop prespecializations, not expected to work in embedded Swift for now
- Use CMO to serialize everything when emitting an embedded Swift module
- Change SILLinker to deserialize/import everything when importing an embedded Swift module
- Add an IR test for importing modules
- Add a deserialization validation test
This adjusts Cxx to be built statically on all platforms including
Windows. The static library support is sufficient to support this
module linking statically on Windows.
Rewrite the handling for the `CxxStdlib` implicit linking to use a
slightly more functional style for filtering. Additionally, add Windows
to the list providing the overlay. The Windows linking scenario is a
slightly more complicated as the library names differ between static and
dynamic variants to disambiguate between import libraries and static
libraries. Take this into account when embedding the library name so
that the linker can find the appropriate content.
Moving the query implementation up to the AST library from SIL will allow
conveniences to be written on specific AST element classes. For instance, this
will allow `EnumDecl` to expose a convenience that enumerates element decls
that are available during lowering.
Also, improve naming and documentation for these queries.
`ReadOnly`/`ArgMemOnly` were mostly moved over, but a few were missed.
Update them all. Also default to `unknown` for no memory effects rather
than none (ie. we should be conservative).
Reformatting everything now that we have `llvm` namespaces. I've
separated this from the main commit to help manage merge-conflicts and
for making it a bit easier to read the mega-patch.
