[pull] swiftwasm from main

include/swift/AST/DeclContext.h

@@ -82,6 +82,7 @@ namespace swift {
   class SerializedDefaultArgumentInitializer;
   class SerializedTopLevelCodeDecl;
   class StructDecl;
+  class AccessorDecl;
 
 namespace serialization {
 using DeclID = llvm::PointerEmbeddedInt<unsigned, 31>;
@@ -457,6 +458,18 @@ class alignas(1 << DeclContextAlignInBits) DeclContext
     return const_cast<DeclContext*>(this)->getInnermostMethodContext();
   }
 
+  /// Returns the innermost accessor context that belongs to a property.
+  ///
+  /// This routine looks through closure, initializer, and local function
+  /// contexts to find the innermost accessor declaration.
+  ///
+  /// \returns the innermost accessor, or null if there is no such context.
+  LLVM_READONLY
+  AccessorDecl *getInnermostPropertyAccessorContext();
+  const AccessorDecl *getInnermostPropertyAccessorContext() const {
+    return const_cast<DeclContext*>(this)->getInnermostPropertyAccessorContext();
+  }
+
   /// Returns the innermost type context.
   ///
   /// This routine looks through closure, initializer, and local function

include/swift/AST/DiagnosticsFrontend.def

@@ -437,7 +437,8 @@ NOTE(sdk_version_pbm_version,none,
 NOTE(compiled_module_ignored_reason,none,
      "compiled module '%0' was ignored because %select{%error"
      "|it belongs to a framework in the SDK"
-     "|loading from module interfaces is preferred}1",
+     "|loading from module interfaces is preferred"
+     "|it's a compiler host module}1",
      (StringRef, unsigned))
 NOTE(out_of_date_module_here,none,
      "%select{compiled|cached|forwarding|prebuilt}0 module is out of date: '%1'",

include/swift/AST/DiagnosticsSema.def

@@ -1676,6 +1676,11 @@ ERROR(attr_objc_implementation_category_not_found,none,
 NOTE(attr_objc_implementation_fixit_remove_category_name,none,
      "remove arguments to implement the main '@interface' for this class",
      ())
+ERROR(attr_objc_implementation_no_conformance,none,
+      "'@_objcImplementation' extension cannot add conformance to %0; "
+      "add this conformance %select{with an ordinary extension|"
+      "in the Objective-C header}1",
+      (Type, bool))
 
 ERROR(member_of_objc_implementation_not_objc_or_final,none,
       "%0 %1 does not match any %0 declared in the headers for %2; did you use "
@@ -7364,7 +7369,22 @@ ERROR(init_accessor_accesses_attribute_on_other_declaration,none,
 ERROR(init_accessor_property_both_init_and_accessed,none,
       "property %0 cannot be both initialized and accessed",
       (DeclName))
-
+ERROR(invalid_use_of_self_in_init_accessor,none,
+      "'self' within init accessors can only be used to reference "
+      "properties listed in 'initializes' and 'accesses'; "
+      "init accessors are run before 'self' is fully available", ())
+ERROR(init_accessor_invalid_member_ref,none,
+      "cannot reference instance member %0; init accessors can only "
+      "refer to instance properties listed in 'initializes' and "
+      "'accesses' attributes",
+      (DeclNameRef))
+ERROR(cannot_synthesize_memberwise_due_to_property_init_order,none,
+      "cannot synthesize memberwise initializer",
+      ())
+NOTE(out_of_order_access_in_init_accessor,none,
+     "init accessor for %0 cannot access stored property %1 because it "
+     "is called before %1 is initialized",
+     (Identifier, Identifier))
 
 #define UNDEFINE_DIAGNOSTIC_MACROS
 #include "DefineDiagnosticMacros.h"

include/swift/AST/TypeMatcher.h

@@ -438,10 +438,12 @@ class TypeMatcher {
 
         if (firstArgs.size() == secondArgs.size()) {
           for (unsigned i : indices(firstArgs)) {
-            return this->visit(CanType(firstArgs[i]),
-                               secondArgs[i],
-                               sugaredFirstType->castTo<ParameterizedProtocolType>()
-                                   ->getArgs()[i]);
+            if (!this->visit(CanType(firstArgs[i]),
+                             secondArgs[i],
+                             sugaredFirstType->castTo<ParameterizedProtocolType>()
+                                 ->getArgs()[i])) {
+              return false;
+            }
           }
 
           return true;

include/swift/Basic/StringExtras.h

@@ -519,6 +519,9 @@ class NullTerminatedStringRef {
 /// where escaped Unicode characters lead to malformed/invalid JSON.
 void writeEscaped(llvm::StringRef Str, llvm::raw_ostream &OS);
 
+/// Whether the path components of `path` begin with those from `prefix`.
+bool pathStartsWith(StringRef prefix, StringRef path);
+
 } // end namespace swift
 
 #endif // SWIFT_BASIC_STRINGEXTRAS_H

include/swift/RemoteInspection/GenericMetadataCacheEntry.h

@@ -0,0 +1,40 @@
+//===--- GenericMetadataCacheEntry.h ----------------------------*- C++ -*-===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+//
+// Declares a struct that mirrors the layout of GenericCacheEntry in
+// Metadata.cpp and use a static assert to check that the offset of
+// the member Value match between the two.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SWIFT_REFLECTION_GENERICMETADATACACHEENTRY_H
+#define SWIFT_REFLECTION_GENERICMETADATACACHEENTRY_H
+
+#include <cstdint>
+
+namespace swift {
+
+template<typename StoredPointer>
+struct GenericMetadataCacheEntry {
+  StoredPointer TrackingInfo;
+  uint16_t NumKeyParameters;
+  uint16_t NumWitnessTables;
+  uint16_t NumPacks;
+  uint16_t NumShapeClasses;
+  StoredPointer PackShapeDescriptors;
+  uint32_t Hash;
+  StoredPointer Value;
+};
+
+} // namespace swift
+
+#endif // SWIFT_REFLECTION_GENERICMETADATACACHEENTRY_H

include/swift/RemoteInspection/ReflectionContext.h

@@ -30,6 +30,7 @@
 #include "swift/Concurrency/Actor.h"
 #include "swift/Remote/MemoryReader.h"
 #include "swift/Remote/MetadataReader.h"
+#include "swift/RemoteInspection/GenericMetadataCacheEntry.h"
 #include "swift/RemoteInspection/Records.h"
 #include "swift/RemoteInspection/RuntimeInternals.h"
 #include "swift/RemoteInspection/TypeLowering.h"
@@ -1289,22 +1290,14 @@ class ReflectionContext
   StoredPointer allocationMetadataPointer(
     MetadataAllocation<Runtime> Allocation) {
     if (Allocation.Tag == GenericMetadataCacheTag) {
-        struct GenericMetadataCacheEntry {
-          StoredPointer LockedStorage;
-          uint8_t LockedStorageKind;
-          uint8_t TrackingInfo;
-          uint16_t NumKeyParameters;
-          uint16_t NumWitnessTables;
-          uint32_t Hash;
-          StoredPointer Value;
-        };
         auto AllocationBytes =
           getReader().readBytes(RemoteAddress(Allocation.Ptr),
                                               Allocation.Size);
         if (!AllocationBytes)
           return 0;
-        auto Entry = reinterpret_cast<const GenericMetadataCacheEntry *>(
-          AllocationBytes.get());
+        auto Entry =
+          reinterpret_cast<const GenericMetadataCacheEntry<StoredPointer> *>(
+            AllocationBytes.get());
         return Entry->Value;
     }
     return 0;

include/swift/Runtime/Enum.h

@@ -111,6 +111,12 @@ void swift_initEnumMetadataMultiPayload(EnumMetadata *enumType,
                                         unsigned numPayloads,
                                         const TypeLayout * const *payloadTypes);
 
+SWIFT_RUNTIME_EXPORT
+void swift_initEnumMetadataMultiPayloadWithLayoutString(EnumMetadata *enumType,
+                                                        EnumLayoutFlags flags,
+                                                        unsigned numPayloads,
+                                          const Metadata * const *payloadTypes);
+
 /// Return an integer value representing which case of a multi-payload
 ///        enum is inhabited.
 ///

include/swift/Runtime/RuntimeFunctions.def

@@ -1276,7 +1276,8 @@ FUNCTION(InitStructMetadata,
 // void swift_initStructMetadataWithLayoutString(Metadata *structType,
 //                                               StructLayoutFlags flags,
 //                                               size_t numFields,
-//                                               Metadata * const *fieldTypes,
+//                                               uint8_t * const *fieldTypes,
+//                                               const uint8_t *fieldTags
 //                                               uint32_t *fieldOffsets);
 FUNCTION(InitStructMetadataWithLayoutString,
          swift_initStructMetadataWithLayoutString, C_CC, AlwaysAvailable,
@@ -1312,6 +1313,7 @@ FUNCTION(InitEnumMetadataSinglePayload,
          EFFECT(MetaData))
 
 // void swift_initEnumMetadataMultiPayload(Metadata *enumType,
+//                                         EnumLayoutFlags layoutFlags,
 //                                         size_t numPayloads,
 //                                         TypeLayout * const *payloadTypes);
 FUNCTION(InitEnumMetadataMultiPayload,
@@ -1322,6 +1324,19 @@ FUNCTION(InitEnumMetadataMultiPayload,
          ATTRS(NoUnwind, WillReturn),
          EFFECT(MetaData))
 
+// void
+// swift_initEnumMetadataMultiPayloadWithLayoutString(Metadata *enumType,
+//                                                  EnumLayoutFlags layoutFlags,
+//                                                    size_t numPayloads,
+//                                              Metadata * const *payloadTypes);
+FUNCTION(InitEnumMetadataMultiPayloadWithLayoutString,
+         swift_initEnumMetadataMultiPayloadWithLayoutString,
+         C_CC, AlwaysAvailable,
+         RETURNS(VoidTy),
+         ARGS(TypeMetadataPtrTy, SizeTy, SizeTy, TypeMetadataPtrPtrTy),
+         ATTRS(NoUnwind, WillReturn),
+         EFFECT(MetaData))
+
 // int swift_getEnumCaseMultiPayload(opaque_t *obj, Metadata *enumTy);
 FUNCTION(GetEnumCaseMultiPayload,
          swift_getEnumCaseMultiPayload,

include/swift/Sema/CSFix.h

@@ -447,6 +447,10 @@ enum class FixKind : uint8_t {
 
   /// Ignore missing 'each' keyword before value pack reference.
   IgnoreMissingEachKeyword,
+
+  /// Ignore the fact that member couldn't be referenced within init accessor
+  /// because its name doesn't appear in 'initializes' or 'accesses' attributes.
+  AllowInvalidMemberReferenceInInitAccessor,
 };
 
 class ConstraintFix {
@@ -3536,6 +3540,39 @@ class IgnoreMissingEachKeyword final : public ConstraintFix {
   }
 };
 
+class AllowInvalidMemberReferenceInInitAccessor final : public ConstraintFix {
+  DeclNameRef MemberName;
+
+  AllowInvalidMemberReferenceInInitAccessor(ConstraintSystem &cs,
+                                            DeclNameRef memberName,
+                                            ConstraintLocator *locator)
+      : ConstraintFix(cs, FixKind::AllowInvalidMemberReferenceInInitAccessor,
+                      locator),
+        MemberName(memberName) {}
+
+public:
+  std::string getName() const override {
+    llvm::SmallVector<char, 16> scratch;
+    auto memberName = MemberName.getString(scratch);
+    return "allow reference to member '" + memberName.str() +
+           "' in init accessor";
+  }
+
+  bool diagnose(const Solution &solution, bool asNote = false) const override;
+
+  bool diagnoseForAmbiguity(CommonFixesArray commonFixes) const override {
+    return diagnose(*commonFixes.front().first);
+  }
+
+  static AllowInvalidMemberReferenceInInitAccessor *
+  create(ConstraintSystem &cs, DeclNameRef memberName,
+         ConstraintLocator *locator);
+
+  static bool classof(const ConstraintFix *fix) {
+    return fix->getKind() == FixKind::AllowInvalidMemberReferenceInInitAccessor;
+  }
+};
+
 } // end namespace constraints
 } // end namespace swift
 

include/swift/Sema/ConstraintSystem.h

@@ -1879,6 +1879,11 @@ struct MemberLookupResult {
     /// This is a static member being access through a protocol metatype
     /// but its result type doesn't conform to this protocol.
     UR_InvalidStaticMemberOnProtocolMetatype,
+
+    /// This is a member that doesn't appear in 'initializes' and/or
+    /// 'accesses' attributes of the init accessor and therefore canno
+    /// t be referenced in its body.
+    UR_UnavailableWithinInitAccessor,
   };
 
   /// This is a list of considered (but rejected) candidates, along with a

lib/AST/Decl.cpp

@@ -7168,6 +7168,12 @@ bool VarDecl::isMemberwiseInitialized(bool preferDeclaredProperties) const {
       isBackingStorageForDeclaredProperty(this))
     return false;
 
+  // If this is a computed property with `init` accessor, it's
+  // memberwise initializable when it could be used to initialize
+  // other stored properties.
+  if (auto *init = getAccessor(AccessorKind::Init))
+    return init->getAttrs().hasAttribute<InitializesAttr>();
+
   // If this is a computed property, it's not memberwise initialized unless
   // the caller has asked for the declared properties and it is either a
   // `lazy` property or a property with an attached wrapper.

lib/AST/DeclContext.cpp

@@ -211,6 +211,24 @@ AbstractFunctionDecl *DeclContext::getInnermostMethodContext() {
   return nullptr;
 }
 
+AccessorDecl *DeclContext::getInnermostPropertyAccessorContext() {
+  auto dc = this;
+  do {
+    if (auto decl = dc->getAsDecl()) {
+      auto accessor = dyn_cast<AccessorDecl>(decl);
+      // If we found a non-accessor decl, we're done.
+      if (accessor == nullptr)
+        return nullptr;
+
+      auto *storage = accessor->getStorage();
+      if (isa<VarDecl>(storage) && storage->getDeclContext()->isTypeContext())
+        return accessor;
+    }
+  } while ((dc = dc->getParent()));
+
+  return nullptr;
+}
+
 bool DeclContext::isTypeContext() const {
   if (auto decl = getAsDecl())
     return isa<NominalTypeDecl>(decl) || isa<ExtensionDecl>(decl);

lib/AST/Module.cpp

@@ -43,6 +43,7 @@
 #include "swift/Basic/Compiler.h"
 #include "swift/Basic/SourceManager.h"
 #include "swift/Basic/Statistic.h"
+#include "swift/Basic/StringExtras.h"
 #include "swift/Demangling/ManglingMacros.h"
 #include "swift/Parse/Token.h"
 #include "swift/Strings.h"
@@ -4235,18 +4236,6 @@ FrontendStatsTracer::getTraceFormatter<const SourceFile *>() {
   return &TF;
 }
 
-static bool prefixMatches(StringRef prefix, StringRef path) {
-  auto prefixIt = llvm::sys::path::begin(prefix),
-       prefixEnd = llvm::sys::path::end(prefix);
-  for (auto pathIt = llvm::sys::path::begin(path),
-            pathEnd = llvm::sys::path::end(path);
-       prefixIt != prefixEnd && pathIt != pathEnd; ++prefixIt, ++pathIt) {
-    if (*prefixIt != *pathIt)
-      return false;
-  }
-  return prefixIt == prefixEnd;
-}
-
 bool IsNonUserModuleRequest::evaluate(Evaluator &evaluator, ModuleDecl *mod) const {
   // stdlib is non-user by definition
   if (mod->isStdlibModule())
@@ -4274,5 +4263,6 @@ bool IsNonUserModuleRequest::evaluate(Evaluator &evaluator, ModuleDecl *mod) con
     return false;
 
   StringRef runtimePath = searchPathOpts.RuntimeResourcePath;
-  return (!runtimePath.empty() && prefixMatches(runtimePath, modulePath)) || (!sdkPath.empty() && prefixMatches(sdkPath, modulePath));
+  return (!runtimePath.empty() && pathStartsWith(runtimePath, modulePath)) ||
+      (!sdkPath.empty() && pathStartsWith(sdkPath, modulePath));
 }

lib/Basic/StringExtras.cpp

@@ -23,6 +23,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 
@@ -1417,3 +1418,15 @@ void swift::writeEscaped(llvm::StringRef Str, llvm::raw_ostream &OS) {
     }
   }
 }
+
+bool swift::pathStartsWith(StringRef prefix, StringRef path) {
+  auto prefixIt = llvm::sys::path::begin(prefix),
+       prefixEnd = llvm::sys::path::end(prefix);
+  for (auto pathIt = llvm::sys::path::begin(path),
+            pathEnd = llvm::sys::path::end(path);
+       prefixIt != prefixEnd && pathIt != pathEnd; ++prefixIt, ++pathIt) {
+    if (*prefixIt != *pathIt)
+      return false;
+  }
+  return prefixIt == prefixEnd;
+}