---

yaml
---
r: 343191
b: refs/heads/master-rebranch
c: e5fa534
h: refs/heads/master
i:
  343189: bc5a657
  343187: a0074e8
  343183: 3f8d1ca

Author: CodaFi

[refs]

@@ -1455,7 +1455,7 @@ refs/tags/swift-DEVELOPMENT-SNAPSHOT-2019-08-02-a: ddd2b2976aa9bfde5f20fe37f6bd2
 refs/tags/swift-DEVELOPMENT-SNAPSHOT-2019-08-03-a: 171cc166f2abeb5ca2a4003700a8a78a108bd300
 refs/heads/benlangmuir-patch-1: baaebaf39d52f3bf36710d4fe40cf212e996b212
 refs/heads/i-do-redeclare: 8c4e6d5de5c1e3f0a2cedccf319df713ea22c48e
-refs/heads/master-rebranch: 7bca7291e2a58d90b6ae9f082e3e58c976550e97
+refs/heads/master-rebranch: e5fa534cc79f74bf624ca2b1412bf434eded990a
 refs/heads/rdar-53901732: 9bd06af3284e18a109cdbf9aa59d833b24eeca7b
 refs/heads/revert-26776-subst-always-returns-a-type: 1b8e18fdd391903a348970a4c848995d4cdd789c
 refs/heads/tensorflow-merge: 8b854f62f80d4476cb383d43c4aac2001dde3cec

branches/master-rebranch/include/swift/AST/ASTContext.h

@@ -112,10 +112,6 @@ namespace swift {
 
   enum class KnownProtocolKind : uint8_t;
 
-namespace namelookup {
-  class ImportCache;
-}
-
 namespace syntax {
   class SyntaxArena;
 }
@@ -687,9 +683,7 @@ class ASTContext final {
   /// If there is no Clang module loader, returns a null pointer.
   /// The loader is owned by the AST context.
   ClangModuleLoader *getDWARFModuleLoader() const;
-
-  namelookup::ImportCache &getImportCache() const;
-
+  
   /// Asks every module loader to verify the ASTs it has loaded.
   ///
   /// Does nothing in non-asserts (NDEBUG) builds.

branches/master-rebranch/include/swift/AST/ASTNode.h

@@ -36,10 +36,10 @@ namespace swift {
   enum class DeclKind : uint8_t;
   enum class StmtKind;
 
-  struct ASTNode : public llvm::PointerUnion<Expr*, Stmt*, Decl*> {
+  struct ASTNode : public llvm::PointerUnion3<Expr*, Stmt*, Decl*> {
     // Inherit the constructors from PointerUnion.
-    using PointerUnion::PointerUnion;
-
+    using PointerUnion3::PointerUnion3;
+    
     SourceRange getSourceRange() const;
 
     /// Return the location of the start of the statement.

branches/master-rebranch/include/swift/AST/Decl.h

@@ -4789,7 +4789,7 @@ class VarDecl : public AbstractStorageDecl {
   };
 
 protected:
-  PointerUnion<PatternBindingDecl *, Stmt *, VarDecl *> Parent;
+  PointerUnion3<PatternBindingDecl *, Stmt *, VarDecl *> Parent;
 
   VarDecl(DeclKind kind, bool isStatic, Introducer introducer,
           bool issCaptureList, SourceLoc nameLoc, Identifier name,

branches/master-rebranch/include/swift/AST/DiagnosticsClangImporter.def

@@ -91,6 +91,10 @@ WARNING(implicit_bridging_header_imported_from_module,none,
         "is deprecated and will be removed in a later version of Swift",
         (StringRef, Identifier))
 
+WARNING(clang_vfs_overlay_is_ignored,none,
+        "ignoring '-ivfsoverlay' options provided to '-Xcc' in favor of "
+        "'-vfsoverlay'", ())
+
 #ifndef DIAG_NO_UNDEF
 # if defined(DIAG)
 #  undef DIAG

branches/master-rebranch/include/swift/AST/GenericSignatureBuilder.h

@@ -92,10 +92,10 @@ class GenericSignatureBuilder {
   class ResolvedType;
 
   using UnresolvedRequirementRHS =
-      llvm::PointerUnion<Type, PotentialArchetype *, LayoutConstraint>;
+      llvm::PointerUnion3<Type, PotentialArchetype *, LayoutConstraint>;
 
   using RequirementRHS =
-    llvm::PointerUnion<Type, PotentialArchetype *, LayoutConstraint>;
+    llvm::PointerUnion3<Type, PotentialArchetype *, LayoutConstraint>;
 
   /// The location of a requirement as written somewhere in the source.
   typedef llvm::PointerUnion<const TypeRepr *, const RequirementRepr *>
@@ -1374,8 +1374,8 @@ class GenericSignatureBuilder::FloatingRequirementSource {
   } kind;
 
   using Storage =
-    llvm::PointerUnion<const RequirementSource *, const TypeRepr *,
-                       const RequirementRepr *>;
+    llvm::PointerUnion3<const RequirementSource *, const TypeRepr *,
+                        const RequirementRepr *>;
 
   Storage storage;
 

branches/master-rebranch/include/swift/AST/ImportCache.h

@@ -24,10 +24,6 @@
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/TinyPtrVector.h"
 
-namespace llvm {
-class FileCollector;
-}
-
 namespace clang {
 class DependencyCollector;
 }
@@ -58,9 +54,8 @@ enum class Bridgeability : unsigned {
 class DependencyTracker {
   std::shared_ptr<clang::DependencyCollector> clangCollector;
 public:
-  explicit DependencyTracker(
-      bool TrackSystemDeps,
-      std::shared_ptr<llvm::FileCollector> FileCollector = {});
+
+  explicit DependencyTracker(bool TrackSystemDeps);
 
   /// Adds a file as a dependency.
   ///

branches/master-rebranch/include/swift/AST/ModuleLoader.h

@@ -378,11 +378,11 @@ bool removeOverriddenDecls(SmallVectorImpl<ValueDecl*> &decls);
 /// other declarations in that set.
 ///
 /// \param decls The set of declarations being considered.
-/// \param dc The DeclContext from which the lookup was performed.
+/// \param curModule The current module.
 ///
 /// \returns true if any shadowed declarations were removed.
 bool removeShadowedDecls(SmallVectorImpl<ValueDecl*> &decls,
-                         const DeclContext *dc);
+                         const ModuleDecl *curModule);
 
 /// Finds decls visible in the given context and feeds them to the given
 /// VisibleDeclConsumer.  If the current DeclContext is nested in a function,

branches/master-rebranch/include/swift/AST/NameLookup.h

@@ -369,7 +369,7 @@ struct WhereClauseOwner {
 
   /// The source of the where clause, which can be a generic parameter list
   /// or a declaration that can have a where clause.
-  llvm::PointerUnion<GenericParamList *, Decl *, SpecializeAttr *> source;
+  llvm::PointerUnion3<GenericParamList *, Decl *, SpecializeAttr *> source;
 
   WhereClauseOwner(Decl *decl);
 

branches/master-rebranch/include/swift/AST/TypeCheckRequests.h

@@ -42,7 +42,8 @@ namespace llvm {
   template<typename T> class MutableArrayRef;
   template<typename T> class TinyPtrVector;
   template<typename T> class Optional;
-  template <typename ...PTs> class PointerUnion;
+  template <typename PT1, typename PT2> class PointerUnion;
+  template <typename PT1, typename PT2, typename PT3> class PointerUnion3;
   class SmallBitVector;
 
   // Other common classes.
@@ -67,6 +68,7 @@ namespace swift {
   using llvm::None;
   using llvm::Optional;
   using llvm::PointerUnion;
+  using llvm::PointerUnion3;
   using llvm::SmallBitVector;
   using llvm::SmallPtrSet;
   using llvm::SmallPtrSetImpl;

branches/master-rebranch/include/swift/Basic/LLVM.h

@@ -175,19 +175,6 @@ FRONTEND_STATISTIC(AST, NumBraceStmtASTScopeExpansions)
 /// Number of ASTScope lookups
 FRONTEND_STATISTIC(AST, NumASTScopeLookups)
 
-/// Number of lookups of the cached import graph for a module or
-/// source file.
-FRONTEND_STATISTIC(AST, ImportSetFoldHit)
-FRONTEND_STATISTIC(AST, ImportSetFoldMiss)
-
-FRONTEND_STATISTIC(AST, ImportSetCacheHit)
-FRONTEND_STATISTIC(AST, ImportSetCacheMiss)
-
-FRONTEND_STATISTIC(AST, ModuleVisibilityCacheHit)
-FRONTEND_STATISTIC(AST, ModuleVisibilityCacheMiss)
-
-FRONTEND_STATISTIC(AST, ModuleShadowCacheHit)
-FRONTEND_STATISTIC(AST, ModuleShadowCacheMiss)
 
 /// Number of full function bodies parsed.
 FRONTEND_STATISTIC(Parse, NumFunctionsParsed)

branches/master-rebranch/include/swift/Basic/Statistics.def

@@ -23,7 +23,6 @@
 
 namespace llvm {
   class Triple;
-  class FileCollector;
   template<typename Fn> class function_ref;
 }
 
@@ -148,8 +147,7 @@ class ClangImporter final : public ClangModuleLoader {
   /// Create a new clang::DependencyCollector customized to
   /// ClangImporter's specific uses.
   static std::shared_ptr<clang::DependencyCollector>
-  createDependencyCollector(bool TrackSystemDeps,
-                            std::shared_ptr<llvm::FileCollector> FileCollector);
+  createDependencyCollector(bool TrackSystemDeps);
 
   /// Append visible module names to \p names. Note that names are possibly
   /// duplicated, and not guaranteed to be ordered in any way.

branches/master-rebranch/include/swift/ClangImporter/ClangImporter.h

@@ -96,6 +96,10 @@ class ClangImporterOptions {
   /// When set, don't enforce warnings with -Werror.
   bool DebuggerSupport = false;
 
+  /// When set, clobber the Clang instance's virtual file system with the Swift
+  /// virtual file system.
+  bool ForceUseSwiftVirtualFileSystem = false;
+
   /// Return a hash code of any components from these options that should
   /// contribute to a Swift Bridging PCH hash.
   llvm::hash_code getPCHHashComponents() const {