Merge pull request #1203 from swiftwasm/release/5.3

[pull] swiftwasm-release/5.3 from release/5.3

Author: pull[bot]

include/swift/AST/Decl.h

@@ -2711,6 +2711,7 @@ class ValueDecl : public Decl {
   /// Is this declaration marked with 'dynamic'?
   bool isDynamic() const;
 
+private:
   bool isObjCDynamic() const {
     return isObjC() && isDynamic();
   }
@@ -2719,6 +2720,37 @@ class ValueDecl : public Decl {
     return !isObjC() && isDynamic();
   }
 
+  bool isObjCDynamicInGenericClass() const;
+
+public:
+  /// Should we use Objective-C method dispatch for this decl.
+  bool shouldUseObjCDispatch() const {
+    return isObjCDynamic();
+  }
+
+  /// Should we use native dynamic function replacement dispatch for this decl.
+  bool shouldUseNativeDynamicDispatch() const {
+    return isNativeDynamic();
+  }
+
+  /// Should we use Objective-C category based function replacement for this
+  /// decl.
+  /// This is all `@objc dynamic` methods except for such methods in native
+  /// generic classes. We can't use a category for generic classes so we use
+  /// native replacement instead (this behavior is only enabled with
+  /// -enable-implicit-dynamic).
+  bool shouldUseObjCMethodReplacement() const;
+
+  /// Should we use native dynamic function replacement mechanism for this decl.
+  /// This is all native dynamic methods except for `@objc dynamic` methods in
+  /// generic classes (see above).
+  bool shouldUseNativeMethodReplacement() const;
+
+  /// Is this a native dynamic function replacement based replacement.
+  /// This is all @_dynamicReplacement(for:) of native functions and @objc
+  /// dynamic methods on generic classes (see above).
+  bool isNativeMethodReplacement() const;
+
   bool isEffectiveLinkageMoreVisibleThan(ValueDecl *other) const {
     return (std::min(getEffectiveAccess(), AccessLevel::Public) >
             std::min(other->getEffectiveAccess(), AccessLevel::Public));

include/swift/AST/DiagnosticsSema.def

@@ -5054,8 +5054,8 @@ ERROR(function_builder_infer_ambig, none,
 NOTE(function_builder_infer_add_return, none,
      "add an explicit 'return' statement to not use a function builder", ())
 NOTE(function_builder_infer_pick_specific, none,
-     "apply function builder %0 (inferred from protocol %1)",
-     (Type, DeclName))
+     "apply function builder %0 (inferred from %select{protocol|dynamic replacement of}1 %2)",
+     (Type, unsigned, DeclName))
 
 //------------------------------------------------------------------------------
 // MARK: Tuple Shuffle Diagnostics

include/swift/AST/Expr.h

@@ -597,13 +597,23 @@ class ErrorExpr : public Expr {
 /// CodeCompletionExpr - Represents the code completion token in the AST, this
 /// can help us preserve the context of the code completion position.
 class CodeCompletionExpr : public Expr {
-  SourceRange Range;
+  Expr *Base;
+  SourceLoc Loc;
 
 public:
-  CodeCompletionExpr(SourceRange Range, Type Ty = Type())
-      : Expr(ExprKind::CodeCompletion, /*Implicit=*/true, Ty), Range(Range) {}
+  CodeCompletionExpr(Expr *Base, SourceLoc Loc)
+      : Expr(ExprKind::CodeCompletion, /*Implicit=*/true, Type()),
+        Base(Base), Loc(Loc) {}
 
-  SourceRange getSourceRange() const { return Range; }
+  CodeCompletionExpr(SourceLoc Loc)
+      : CodeCompletionExpr(/*Base=*/nullptr, Loc) {}
+
+  Expr *getBase() const { return Base; }
+  void setBase(Expr *E) { Base = E; }
+
+  SourceLoc getLoc() const { return Loc; }
+  SourceLoc getStartLoc() const { return Base ? Base->getStartLoc() : Loc; }
+  SourceLoc getEndLoc() const { return Loc; }
 
   static bool classof(const Expr *E) {
     return E->getKind() == ExprKind::CodeCompletion;

include/swift/Basic/LangOptions.h

@@ -316,13 +316,13 @@ namespace swift {
 
     /// Emit the newer, finer-grained swiftdeps file. Eventually will support
     /// faster rebuilds.
-    bool EnableFineGrainedDependencies = true;
+    bool EnableFineGrainedDependencies = false;
 
     /// Instead of hashing tokens inside of NominalType and ExtensionBodies into
     /// the interface hash, hash them into per-iterable-decl-context
     /// fingerprints. Fine-grained dependency types won't dirty every provides
     /// in a file when the user adds a member to, e.g., a struct.
-    bool EnableTypeFingerprints = true;
+    bool EnableTypeFingerprints = false;
 
     /// When using fine-grained dependencies, emit dot files for every swiftdeps
     /// file.
@@ -540,7 +540,10 @@ namespace swift {
     /// Enable constraint solver support for experimental
     ///        operator protocol designator feature.
     bool SolverEnableOperatorDesignatedTypes = false;
-    
+
+    /// Enable experimental support for one-way constraints for the
+    /// parameters of closures.
+    bool EnableOneWayClosureParameters = false;
   };
 } // end namespace swift
 

include/swift/Option/FrontendOptions.td

@@ -632,6 +632,10 @@ def experimental_print_full_convention :
  HelpText<"When emitting a module interface, emit additional @convention "
           "arguments, regardless of whether they were written in the source">;
 
+def experimental_one_way_closure_params :
+  Flag<["-"], "experimental-one-way-closure-params">,
+  HelpText<"Enable experimental support for one-way closure parameters">;
+
 def prebuilt_module_cache_path :
   Separate<["-"], "prebuilt-module-cache-path">,
   HelpText<"Directory of prebuilt modules for loading module interfaces">;

include/swift/Parse/CodeCompletionCallbacks.h

@@ -198,6 +198,10 @@ class CodeCompletionCallbacks {
 
   virtual void completeCallArg(CodeCompletionExpr *E, bool isFirst) {};
 
+  virtual bool canPerformCompleteLabeledTrailingClosure() const {
+    return false;
+  }
+
   virtual void completeLabeledTrailingClosure(CodeCompletionExpr *E,
                                               bool isAtStartOfLine) {};
 

include/swift/Serialization/Validation.h

@@ -98,6 +98,7 @@ class ExtendedValidationInfo {
     unsigned IsSIB : 1;
     unsigned IsTestable : 1;
     unsigned ResilienceStrategy : 2;
+    unsigned IsImplicitDynamicEnabled: 1;
   } Bits;
 public:
   ExtendedValidationInfo() : Bits() {}
@@ -123,6 +124,10 @@ class ExtendedValidationInfo {
   void setPrivateImportsEnabled(bool enabled) {
     Bits.ArePrivateImportsEnabled = enabled;
   }
+  bool isImplicitDynamicEnabled() { return Bits.IsImplicitDynamicEnabled; }
+  void setImplicitDynamicEnabled(bool val) {
+    Bits.IsImplicitDynamicEnabled = val;
+  }
   bool isTestable() const { return Bits.IsTestable; }
   void setIsTestable(bool val) {
     Bits.IsTestable = val;

lib/AST/ASTVerifier.cpp

@@ -3111,12 +3111,12 @@ class Verifier : public ASTWalker {
                storageDecl->getWriteImpl() ==
                    WriteImplKind::StoredWithObservers ||
                storageDecl->getWriteImpl() == WriteImplKind::MutableAddress) &&
-              storageDecl->isNativeDynamic()) &&
+              storageDecl->shouldUseNativeDynamicDispatch()) &&
             // We allow a non dynamic getter if there is a dynamic read.
             !(FD->isGetter() &&
               (storageDecl->getReadImpl() == ReadImplKind::Read ||
                storageDecl->getReadImpl() == ReadImplKind::Address) &&
-              storageDecl->isNativeDynamic())) {
+              storageDecl->shouldUseNativeDynamicDispatch())) {
           Out << "Property and accessor do not match for 'dynamic'\n";
           abort();
         }

lib/AST/ASTWalker.cpp

@@ -476,7 +476,15 @@ class Traversal : public ASTVisitor<Traversal, Expr*, Stmt*,
   } while (false)
 
   Expr *visitErrorExpr(ErrorExpr *E) { return E; }
-  Expr *visitCodeCompletionExpr(CodeCompletionExpr *E) { return E; }
+  Expr *visitCodeCompletionExpr(CodeCompletionExpr *E) {
+    if (Expr *baseExpr = E->getBase()) {
+      Expr *newBaseExpr = doIt(baseExpr);
+      if (!newBaseExpr)
+        return nullptr;
+      E->setBase(newBaseExpr);
+    }
+    return E;
+  }
   Expr *visitLiteralExpr(LiteralExpr *E) { return E; }
   Expr *visitDiscardAssignmentExpr(DiscardAssignmentExpr *E) { return E; }
   Expr *visitTypeExpr(TypeExpr *E) {

lib/AST/Decl.cpp

@@ -1950,7 +1950,7 @@ SourceRange IfConfigDecl::getSourceRange() const {
 }
 
 static bool isPolymorphic(const AbstractStorageDecl *storage) {
-  if (storage->isObjCDynamic())
+  if (storage->shouldUseObjCDispatch())
     return true;
 
 
@@ -2083,7 +2083,7 @@ getDirectReadWriteAccessStrategy(const AbstractStorageDecl *storage) {
     return AccessStrategy::getStorage();
   case ReadWriteImplKind::Stored: {
     // If the storage isDynamic (and not @objc) use the accessors.
-    if (storage->isNativeDynamic())
+    if (storage->shouldUseNativeDynamicDispatch())
       return AccessStrategy::getMaterializeToTemporary(
           getOpaqueReadAccessStrategy(storage, false),
           getOpaqueWriteAccessStrategy(storage, false));
@@ -2168,7 +2168,7 @@ AbstractStorageDecl::getAccessStrategy(AccessSemantics semantics,
       if (isPolymorphic(this))
         return getOpaqueAccessStrategy(this, accessKind, /*dispatch*/ true);
 
-      if (isNativeDynamic())
+      if (shouldUseNativeDynamicDispatch())
         return getOpaqueAccessStrategy(this, accessKind, /*dispatch*/ false);
 
       // If the storage is resilient from the given module and resilience
@@ -2926,6 +2926,59 @@ bool ValueDecl::isDynamic() const {
     getAttrs().hasAttribute<DynamicAttr>());
 }
 
+bool ValueDecl::isObjCDynamicInGenericClass() const {
+  if (!isObjCDynamic())
+    return false;
+
+  auto *DC = this->getDeclContext();
+  auto *classDecl = DC->getSelfClassDecl();
+  if (!classDecl)
+    return false;
+
+  return classDecl->isGenericContext() && !classDecl->usesObjCGenericsModel();
+}
+
+bool ValueDecl::shouldUseObjCMethodReplacement() const {
+  if (isNativeDynamic())
+    return false;
+
+  if (getModuleContext()->isImplicitDynamicEnabled() &&
+      isObjCDynamicInGenericClass())
+    return false;
+
+  return isObjCDynamic();
+}
+
+bool ValueDecl::shouldUseNativeMethodReplacement() const {
+  if (isNativeDynamic())
+    return true;
+
+  if (!isObjCDynamicInGenericClass())
+    return false;
+
+  auto *replacedDecl = getDynamicallyReplacedDecl();
+  if (replacedDecl)
+    return false;
+
+  return getModuleContext()->isImplicitDynamicEnabled();
+}
+
+bool ValueDecl::isNativeMethodReplacement() const {
+  // Is this a @_dynamicReplacement(for:) that use the native dynamic function
+  // replacement mechanism.
+  auto *replacedDecl = getDynamicallyReplacedDecl();
+  if (!replacedDecl)
+    return false;
+
+  if (isNativeDynamic())
+    return true;
+
+  if (isObjCDynamicInGenericClass())
+    return replacedDecl->getModuleContext()->isImplicitDynamicEnabled();
+
+  return false;
+}
+
 void ValueDecl::setIsDynamic(bool value) {
   assert(!LazySemanticInfo.isDynamicComputed ||
          LazySemanticInfo.isDynamic == value);
@@ -5143,7 +5196,7 @@ bool AbstractStorageDecl::hasDidSetOrWillSetDynamicReplacement() const {
 
 bool AbstractStorageDecl::hasAnyNativeDynamicAccessors() const {
   for (auto accessor : getAllAccessors()) {
-    if (accessor->isNativeDynamic())
+    if (accessor->shouldUseNativeDynamicDispatch())
       return true;
   }
   return false;