Merge pull request #4655 from swiftwasm/main

[pull] swiftwasm from main

Author: kateinoigakukun

docs/CppInteroperability/CppInteroperabilityStatus.md

@@ -140,7 +140,31 @@ This status table describes which of the following Swift language features have
 | **Swift Language Feature**     | **Implemented Experimental Support For Using It In C++** |
 |--------------------------------|----------------------------------------------------------|
 | Top-level `@_cdecl` functions  | Yes                                                      |
-| Top-level Swift functions      | Partially, only with C compatible types                  |
-| `inout` parameters             | No                                                       |
+| Top-level Swift functions      | Partially, only with primitive and Swift struct types    |
+| `inout` parameters             | Yes                                                      |
 | Variadic parameters            | No                                                       |
 | Multiple return values         | No                                                       |
+
+**Structs**
+
+| **Swift Language Feature**     | **Implemented Experimental Support For Using It In C++** |
+|--------------------------------|----------------------------------------------------------|
+| Fixed layout structs           | Yes                                                      |
+| Resilient / opaque structs     | Yes                                                      |
+| Copy and destroy semantics     | Yes                                                      |
+| Initializers                   | Partially, as static `init` methods. No failable support |
+
+**Methods**
+
+| **Swift Language Feature**     | **Implemented Experimental Support For Using It In C++** |
+|--------------------------------|----------------------------------------------------------|
+| Instance methods               | Yes, for structs only                                    |
+| Static methods                 | No                                                       |
+
+**Properties**
+
+| **Swift Language Feature**     | **Implemented Experimental Support For Using It In C++** |
+|--------------------------------|----------------------------------------------------------|
+| Getter accessors               | Yes, via `get<name>`. For structs only                   |
+| Setter accessors               | No                                                       |
+| Mutation accessors             | No                                                       |

include/swift/ABI/Metadata.h

@@ -55,6 +55,7 @@ template <typename Runtime> struct TargetStructMetadata;
 template <typename Runtime> struct TargetOpaqueMetadata;
 template <typename Runtime> struct TargetValueMetadata;
 template <typename Runtime> struct TargetForeignClassMetadata;
+template <typename Runtime> struct TargetForeignReferenceTypeMetadata;
 template <typename Runtime> struct TargetContextDescriptor;
 template <typename Runtime> class TargetTypeContextDescriptor;
 template <typename Runtime> class TargetClassDescriptor;
@@ -258,6 +259,7 @@ struct TargetMetadata {
     case MetadataKind::Class:
     case MetadataKind::ObjCClassWrapper:
     case MetadataKind::ForeignClass:
+    case MetadataKind::ForeignReferenceType:
       return true;
 
     default:
@@ -375,6 +377,9 @@ struct TargetMetadata {
     case MetadataKind::ForeignClass:
       return static_cast<const TargetForeignClassMetadata<Runtime> *>(this)
           ->Description;
+    case MetadataKind::ForeignReferenceType:
+      return static_cast<const TargetForeignReferenceTypeMetadata<Runtime> *>(this)
+          ->Description;
     default:
       return nullptr;
     }
@@ -1159,6 +1164,44 @@ struct TargetForeignClassMetadata : public TargetForeignTypeMetadata<Runtime> {
 };
 using ForeignClassMetadata = TargetForeignClassMetadata<InProcess>;
 
+/// The structure of metadata objects for foreign reference types.
+/// A foreign reference type is a non-Swift, non-Objective-C foreign type with
+/// reference semantics. Foreign reference types are pointers/reference to
+/// value types marked with the "import_as_ref" attribute.
+///
+/// Foreign reference types may have *custom* reference counting operations, or
+/// they may be immortal (and therefore trivial).
+///
+/// We assume for now that foreign reference types are entirely opaque
+/// to Swift introspection.
+template <typename Runtime>
+struct TargetForeignReferenceTypeMetadata : public TargetForeignTypeMetadata<Runtime> {
+  using StoredPointer = typename Runtime::StoredPointer;
+
+  /// An out-of-line description of the type.
+  TargetSignedPointer<Runtime, const TargetClassDescriptor<Runtime> * __ptrauth_swift_type_descriptor> Description;
+
+  /// Reserved space.  For now, this should be zero-initialized.
+  /// If this is used for anything in the future, at least some of these
+  /// first bits should be flags.
+  StoredPointer Reserved[1];
+
+  ConstTargetMetadataPointer<Runtime, TargetClassDescriptor>
+  getDescription() const {
+    return Description;
+  }
+
+  typename Runtime::StoredSignedPointer
+  getDescriptionAsSignedPointer() const {
+    return Description;
+  }
+
+  static bool classof(const TargetMetadata<Runtime> *metadata) {
+    return metadata->getKind() == MetadataKind::ForeignReferenceType;
+  }
+};
+using ForeignReferenceTypeMetadata = TargetForeignReferenceTypeMetadata<InProcess>;
+
 /// The common structure of metadata for structs and enums.
 template <typename Runtime>
 struct TargetValueMetadata : public TargetMetadata<Runtime> {

include/swift/ABI/MetadataKind.def

@@ -53,6 +53,9 @@ NOMINALTYPEMETADATAKIND(Optional, 2 | MetadataKindIsNonHeap)
 /// A foreign class, such as a Core Foundation class.
 METADATAKIND(ForeignClass, 3 | MetadataKindIsNonHeap)
 
+/// A non-Swift non-Objective-C class type.
+METADATAKIND(ForeignReferenceType, 4 | MetadataKindIsNonHeap)
+
 /// A type whose value is not exposed in the metadata system.
 METADATAKIND(Opaque, 0 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
 

include/swift/APIDigester/ModuleAnalyzerNodes.h

@@ -157,6 +157,7 @@ struct CheckerOptions {
   bool PrintModule;
   bool SwiftOnly;
   bool SkipOSCheck;
+  bool SkipRemoveDeprecatedCheck;
   bool CompilerStyle;
   bool Migrator;
   StringRef LocationFilter;

include/swift/AST/ASTContext.h

@@ -880,10 +880,6 @@ class ASTContext final {
   /// for extended existential types.
   AvailabilityContext getParameterizedExistentialRuntimeAvailability();
 
-  /// Get the runtime availability of immortal ref-count symbols, which are
-  /// needed to place array buffers into constant data sections.
-  AvailabilityContext getImmortalRefCountSymbolsAvailability();
-
   /// Get the runtime availability of features introduced in the Swift 5.2
   /// compiler for the target platform.
   AvailabilityContext getSwift52Availability();

include/swift/AST/ASTMangler.h

@@ -197,7 +197,7 @@ class ASTMangler : public Mangler {
                                              Type GlobalActorBound,
                                              ModuleDecl *Module);
 
-  std::string mangleDistributedThunk(const FuncDecl *thunk);
+  std::string mangleDistributedThunk(const AbstractFunctionDecl *thunk);
 
   /// Mangle a completion handler block implementation function, used for importing ObjC
   /// APIs as async.

include/swift/AST/Attr.def

@@ -664,7 +664,7 @@ SIMPLE_DECL_ATTR(_inheritActorContext, InheritActorContext,
 // 117 was 'spawn' and is now unused
 
 CONTEXTUAL_SIMPLE_DECL_ATTR(distributed, DistributedActor,
-  DeclModifier | OnClass | OnFunc | OnVar |
+  DeclModifier | OnClass | OnFunc | OnAccessor | OnVar |
   ABIBreakingToAdd | ABIBreakingToRemove |
   APIBreakingToAdd | APIBreakingToRemove,
   118)
@@ -735,6 +735,12 @@ CONTEXTUAL_SIMPLE_DECL_ATTR(_local, KnownToBeLocal,
   APIBreakingToAdd | APIBreakingToRemove,
   130)
 
+SIMPLE_DECL_ATTR(_distributed_thunk, DistributedThunk,
+  OnFunc | UserInaccessible |
+  ABIBreakingToAdd | ABIBreakingToRemove |
+  APIBreakingToAdd | APIBreakingToRemove,
+  131)
+
 // If you're adding a new underscored attribute here, please document it in
 // docs/ReferenceGuides/UnderscoredAttributes.md.
 

include/swift/AST/Decl.h

@@ -5355,6 +5355,10 @@ class VarDecl : public AbstractStorageDecl {
   /// Does this have a 'distributed' modifier?
   bool isDistributed() const;
 
+  /// Return a distributed thunk if this computed property is marked as
+  /// 'distributed' and and nullptr otherwise.
+  FuncDecl *getDistributedThunk() const;
+
   /// Is this var known to be a "local" distributed actor,
   /// if so the implicit throwing ans some isolation checks can be skipped.
   bool isKnownToBeLocal() const;
@@ -6410,6 +6414,9 @@ class AbstractFunctionDecl : public GenericContext, public ValueDecl {
   /// A function is concurrent if it has the @Sendable attribute.
   bool isSendable() const;
 
+  /// Determine if function has 'nonisolated' attribute
+  bool isNonisolated() const;
+
   /// Returns true if the function is a suitable 'async' context.
   ///
   /// Functions that are an 'async' context can make calls to 'async' functions.
@@ -6429,6 +6436,10 @@ class AbstractFunctionDecl : public GenericContext, public ValueDecl {
   /// Returns 'true' if the function is distributed.
   bool isDistributed() const;
 
+  /// Is this a thunk function used to access a distributed method outside
+  /// of its actor isolation context?
+  bool isDistributedThunk() const;
+
   /// For a 'distributed' target (func or computed property),
   /// get the 'thunk' responsible for performing the 'remoteCall'.
   ///
@@ -6757,7 +6768,7 @@ class AbstractFunctionDecl : public GenericContext, public ValueDecl {
   bool hasDynamicSelfResult() const;
 
   /// The async function marked as the alternative to this function, if any.
-  AbstractFunctionDecl *getAsyncAlternative() const;
+  AbstractFunctionDecl *getAsyncAlternative(bool isKnownObjC = false) const;
 
   /// If \p asyncAlternative is set, then compare its parameters to this
   /// (presumed synchronous) function's parameters to find the index of the

include/swift/AST/DiagnosticsSema.def

@@ -4604,6 +4604,9 @@ ERROR(distributed_actor_isolated_method,none,
 ERROR(distributed_local_cannot_be_used,none,
       "'local' cannot be used in user-defined code currently",
       ())
+ERROR(distributed_thunk_cannot_be_used,none,
+      "'distributed_thunk' cannot be used in user-defined code",
+      ())
 ERROR(distributed_actor_func_param_not_codable,none,
       "parameter '%0' of type %1 in %2 does not conform to serialization requirement '%3'",
       (StringRef, Type, DescriptiveDeclKind, StringRef))
@@ -4801,6 +4804,9 @@ ERROR(distributed_property_cannot_be_static,none,
 ERROR(distributed_property_can_only_be_computed,none,
       "%0 %1 cannot be 'distributed', only computed properties can",
       (DescriptiveDeclKind, DeclName))
+ERROR(distributed_property_accessor_only_get_can_be_distributed,none,
+      "only 'get' accessors may be 'distributed'",
+      ())
 NOTE(distributed_actor_isolated_property,none,
       "access to %0 %1 is only permitted within distributed actor %2",
       (DescriptiveDeclKind, DeclName, DeclName))
@@ -6179,6 +6185,10 @@ ERROR(result_builder_requires_explicit_var_initialization,none,
 ERROR(cannot_declare_computed_var_in_result_builder,none,
       "cannot declare local %select{lazy|wrapped|computed|observed}0 variable "
       "in result builder", (unsigned))
+ERROR(cannot_convert_result_builder_result_to_return_type,none,
+      "cannot convert result builder result type %0 to return type %1",
+      (Type,Type))
+
 
 //------------------------------------------------------------------------------
 // MARK: Tuple Shuffle Diagnostics

include/swift/AST/Expr.h

@@ -319,7 +319,7 @@ class alignas(8) Expr : public ASTAllocated<Expr> {
     ImplicitlyAsync : 1,
     ImplicitlyThrows : 1,
     NoAsync : 1,
-    ShouldApplyDistributedThunk : 1
+    UsesDistributedThunk : 1
   );
 
   SWIFT_INLINE_BITFIELD_EMPTY(CallExpr, ApplyExpr);
@@ -4445,7 +4445,7 @@ class ApplyExpr : public Expr {
     Bits.ApplyExpr.ImplicitlyAsync = false;
     Bits.ApplyExpr.ImplicitlyThrows = false;
     Bits.ApplyExpr.NoAsync = false;
-    Bits.ApplyExpr.ShouldApplyDistributedThunk = false;
+    Bits.ApplyExpr.UsesDistributedThunk = false;
   }
 
 public:
@@ -4532,11 +4532,11 @@ class ApplyExpr : public Expr {
 
   /// Informs IRGen to that this expression should be applied as its distributed
   /// thunk, rather than invoking the function directly.
-  bool shouldApplyDistributedThunk() const {
-    return Bits.ApplyExpr.ShouldApplyDistributedThunk;
+  bool usesDistributedThunk() const {
+    return Bits.ApplyExpr.UsesDistributedThunk;
   }
-  void setShouldApplyDistributedThunk(bool flag) {
-    Bits.ApplyExpr.ShouldApplyDistributedThunk = flag;
+  void setUsesDistributedThunk(bool flag) {
+    Bits.ApplyExpr.UsesDistributedThunk = flag;
   }
 
   ValueDecl *getCalledValue() const;