vendor/clang/clang-trunk-r366426

12 files changed, 216 insertions, 93 deletions

diff --git a/include/clang/Serialization/ASTBitCodes.h b/include/clang/Serialization/ASTBitCodes.h
index ec752fb7c796e..0e1b9e0af9e6d 100644
--- a/include/clang/Serialization/ASTBitCodes.h
+++ b/include/clang/Serialization/ASTBitCodes.h
@@ -1,9 +1,8 @@
 //===- ASTBitCodes.h - Enum values for the PCH bitcode format ---*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -24,7 +23,7 @@
 #include "clang/Basic/OperatorKinds.h"
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/DenseMapInfo.h"
-#include "llvm/Bitcode/BitCodes.h"
+#include "llvm/Bitstream/BitCodes.h"
 #include <cassert>
 #include <cstdint>
 
@@ -1174,7 +1173,10 @@ namespace serialization {
       TYPE_DEPENDENT_ADDRESS_SPACE = 47,
 
       /// A dependentSizedVectorType record.
-      TYPE_DEPENDENT_SIZED_VECTOR = 48
+      TYPE_DEPENDENT_SIZED_VECTOR = 48,
+
+      /// A type defined in a macro.
+      TYPE_MACRO_QUALIFIED = 49
     };
 
     /// The type IDs for special types constructed by semantic
@@ -1439,9 +1441,6 @@ namespace serialization {
       /// A CXXConstructorDecl record.
       DECL_CXX_CONSTRUCTOR,
 
-      /// A CXXConstructorDecl record for an inherited constructor.
-      DECL_CXX_INHERITED_CONSTRUCTOR,
-
       /// A CXXDestructorDecl record.
       DECL_CXX_DESTRUCTOR,
 
@@ -1490,7 +1489,10 @@ namespace serialization {
       /// A TypeAliasTemplateDecl record.
       DECL_TYPE_ALIAS_TEMPLATE,
 
-      /// A StaticAssertDecl record.
+      /// \brief A ConceptDecl record.
+      DECL_CONCEPT,
+
+      /// \brief A StaticAssertDecl record.
       DECL_STATIC_ASSERT,
 
       /// A record containing CXXBaseSpecifiers.
@@ -1522,7 +1524,10 @@ namespace serialization {
 
       /// An OMPRequiresDecl record.
       DECL_OMP_REQUIRES,
-	 
+
+      /// An OMPAllocateDcl record.
+      DECL_OMP_ALLOCATE,
+
       /// An EmptyDecl record.
       DECL_EMPTY,
 
@@ -1538,6 +1543,9 @@ namespace serialization {
       /// A PragmaDetectMismatchDecl record.
       DECL_PRAGMA_DETECT_MISMATCH,
 
+      /// An OMPDeclareMapperDecl record.
+      DECL_OMP_DECLARE_MAPPER,
+
       /// An OMPDeclareReductionDecl record.
       DECL_OMP_DECLARE_REDUCTION,
 
@@ -1727,6 +1735,9 @@ namespace serialization {
       /// A GNUNullExpr record.
       EXPR_GNU_NULL,
 
+      /// A SourceLocExpr record.
+      EXPR_SOURCE_LOC,
+
       /// A ShuffleVectorExpr record.
       EXPR_SHUFFLE_VECTOR,
 
diff --git a/include/clang/Serialization/ASTDeserializationListener.h b/include/clang/Serialization/ASTDeserializationListener.h
index c462a90dde549..f3a01a4b97315 100644
--- a/include/clang/Serialization/ASTDeserializationListener.h
+++ b/include/clang/Serialization/ASTDeserializationListener.h
@@ -1,9 +1,8 @@
 //===- ASTDeserializationListener.h - Decl/Type PCH Read Events -*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/include/clang/Serialization/ASTReader.h b/include/clang/Serialization/ASTReader.h
index f97f545852f48..37bea48d88465 100644
--- a/include/clang/Serialization/ASTReader.h
+++ b/include/clang/Serialization/ASTReader.h
@@ -1,9 +1,8 @@
 //===- ASTReader.h - AST File Reader ----------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -57,7 +56,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/iterator.h"
 #include "llvm/ADT/iterator_range.h"
-#include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/Bitstream/BitstreamReader.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -98,7 +97,7 @@ class HeaderSearchOptions;
 class LangOptions;
 class LazyASTUnresolvedSet;
 class MacroInfo;
-class MemoryBufferCache;
+class InMemoryModuleCache;
 class NamedDecl;
 class NamespaceDecl;
 class ObjCCategoryDecl;
@@ -441,9 +440,6 @@ private:
   /// The module manager which manages modules and their dependencies
   ModuleManager ModuleMgr;
 
-  /// The cache that manages memory buffers for PCM files.
-  MemoryBufferCache &PCMCache;
-
   /// A dummy identifier resolver used to merge TU-scope declarations in
   /// C, for the cases where we don't have a Sema object to provide a real
   /// identifier resolver.
@@ -1441,6 +1437,7 @@ private:
   void Error(StringRef Msg) const;
   void Error(unsigned DiagID, StringRef Arg1 = StringRef(),
              StringRef Arg2 = StringRef()) const;
+  void Error(llvm::Error &&Err) const;
 
 public:
   /// Load the AST file and validate its contents against the given
@@ -1482,8 +1479,8 @@ public:
   ///
   /// \param ReadTimer If non-null, a timer used to track the time spent
   /// deserializing.
-  ASTReader(Preprocessor &PP, ASTContext *Context,
-            const PCHContainerReader &PCHContainerRdr,
+  ASTReader(Preprocessor &PP, InMemoryModuleCache &ModuleCache,
+            ASTContext *Context, const PCHContainerReader &PCHContainerRdr,
             ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
             StringRef isysroot = "", bool DisableValidation = false,
             bool AllowASTWithCompilerErrors = false,
@@ -2224,6 +2221,9 @@ public:
   llvm::APFloat ReadAPFloat(const RecordData &Record,
                             const llvm::fltSemantics &Sem, unsigned &Idx);
 
+  /// Read an APValue
+  APValue ReadAPValue(const RecordData &Record, unsigned &Idx);
+
   // Read a string
   static std::string ReadString(const RecordData &Record, unsigned &Idx);
 
@@ -2235,6 +2235,10 @@ public:
   // Read a path
   std::string ReadPath(ModuleFile &F, const RecordData &Record, unsigned &Idx);
 
+  // Read a path
+  std::string ReadPath(StringRef BaseDirectory, const RecordData &Record,
+                       unsigned &Idx);
+
   // Skip a path
   static void SkipPath(const RecordData &Record, unsigned &Idx) {
     SkipString(Record, Idx);
@@ -2376,7 +2380,8 @@ public:
 
   /// Reads a record with id AbbrevID from Cursor, resetting the
   /// internal state.
-  unsigned readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID);
+  Expected<unsigned> readRecord(llvm::BitstreamCursor &Cursor,
+                                unsigned AbbrevID);
 
   /// Is this a module file for a module (rather than a PCH or similar).
   bool isModule() const { return F->isModule(); }
@@ -2430,6 +2435,14 @@ public:
                                                  ID);
   }
 
+  ExplicitSpecifier readExplicitSpec() {
+    uint64_t Kind = readInt();
+    bool HasExpr = Kind & 0x1;
+    Kind = Kind >> 1;
+    return ExplicitSpecifier(HasExpr ? readExpr() : nullptr,
+                             static_cast<ExplicitSpecKind>(Kind));
+  }
+
   void readExceptionSpec(SmallVectorImpl<QualType> &ExceptionStorage,
                          FunctionProtoType::ExceptionSpecInfo &ESI) {
     return Reader->readExceptionSpec(*F, ExceptionStorage, ESI, Record, Idx);
@@ -2604,6 +2617,8 @@ public:
     return Reader->ReadSourceRange(*F, Record, Idx);
   }
 
+  APValue readAPValue() { return Reader->ReadAPValue(Record, Idx); }
+
   /// Read an integral value, advancing Idx.
   llvm::APInt readAPInt() {
     return Reader->ReadAPInt(Record, Idx);
@@ -2666,7 +2681,10 @@ struct SavedStreamPosition {
       : Cursor(Cursor), Offset(Cursor.GetCurrentBitNo()) {}
 
   ~SavedStreamPosition() {
-    Cursor.JumpToBit(Offset);
+    if (llvm::Error Err = Cursor.JumpToBit(Offset))
+      llvm::report_fatal_error(
+          "Cursor should always be able to go back, failed: " +
+          toString(std::move(Err)));
   }
 
 private:
diff --git a/include/clang/Serialization/ASTWriter.h b/include/clang/Serialization/ASTWriter.h
index 11af30ac8373e..76bd874fb0128 100644
--- a/include/clang/Serialization/ASTWriter.h
+++ b/include/clang/Serialization/ASTWriter.h
@@ -1,9 +1,8 @@
 //===- ASTWriter.h - AST File Writer ----------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -37,7 +36,7 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/Bitcode/BitstreamWriter.h"
+#include "llvm/Bitstream/BitstreamWriter.h"
 #include <cassert>
 #include <cstddef>
 #include <cstdint>
@@ -75,8 +74,8 @@ class IdentifierResolver;
 class LangOptions;
 class MacroDefinitionRecord;
 class MacroInfo;
-class MemoryBufferCache;
 class Module;
+class InMemoryModuleCache;
 class ModuleFileExtension;
 class ModuleFileExtensionWriter;
 class NamedDecl;
@@ -133,7 +132,7 @@ private:
   const SmallVectorImpl<char> &Buffer;
 
   /// The PCM manager which manages memory buffers for pcm files.
-  MemoryBufferCache &PCMCache;
+  InMemoryModuleCache &ModuleCache;
 
   /// The ASTContext we're writing.
   ASTContext *Context = nullptr;
@@ -543,7 +542,7 @@ public:
   /// Create a new precompiled header writer that outputs to
   /// the given bitstream.
   ASTWriter(llvm::BitstreamWriter &Stream, SmallVectorImpl<char> &Buffer,
-            MemoryBufferCache &PCMCache,
+            InMemoryModuleCache &ModuleCache,
             ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
             bool IncludeTimestamps = true);
   ~ASTWriter() override;
@@ -571,7 +570,8 @@ public:
   /// the module but currently is merely a random 32-bit number.
   ASTFileSignature WriteAST(Sema &SemaRef, const std::string &OutputFile,
                             Module *WritingModule, StringRef isysroot,
-                            bool hasErrors = false);
+                            bool hasErrors = false,
+                            bool ShouldCacheASTInMemory = false);
 
   /// Emit a token.
   void AddToken(const Token &Tok, RecordDataImpl &Record);
@@ -738,6 +738,7 @@ private:
   void DeclarationMarkedOpenMPThreadPrivate(const Decl *D) override;
   void DeclarationMarkedOpenMPDeclareTarget(const Decl *D,
                                             const Attr *Attr) override;
+  void DeclarationMarkedOpenMPAllocate(const Decl *D, const Attr *A) override;
   void RedefinedHiddenDefinition(const NamedDecl *D, Module *M) override;
   void AddedAttributeToRecord(const Attr *Attr,
                               const RecordDecl *Record) override;
@@ -862,6 +863,9 @@ public:
   /// Emit a floating-point value.
   void AddAPFloat(const llvm::APFloat &Value);
 
+  /// Emit an APvalue.
+  void AddAPValue(const APValue &Value);
+
   /// Emit a reference to an identifier.
   void AddIdentifierRef(const IdentifierInfo *II) {
     return Writer->AddIdentifierRef(II, *Record);
@@ -974,6 +978,7 @@ class PCHGenerator : public SemaConsumer {
   llvm::BitstreamWriter Stream;
   ASTWriter Writer;
   bool AllowASTWithErrors;
+  bool ShouldCacheASTInMemory;
 
 protected:
   ASTWriter &getWriter() { return Writer; }
@@ -981,10 +986,12 @@ protected:
   SmallVectorImpl<char> &getPCH() const { return Buffer->Data; }
 
 public:
-  PCHGenerator(const Preprocessor &PP, StringRef OutputFile, StringRef isysroot,
+  PCHGenerator(const Preprocessor &PP, InMemoryModuleCache &ModuleCache,
+               StringRef OutputFile, StringRef isysroot,
                std::shared_ptr<PCHBuffer> Buffer,
                ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
-               bool AllowASTWithErrors = false, bool IncludeTimestamps = true);
+               bool AllowASTWithErrors = false, bool IncludeTimestamps = true,
+               bool ShouldCacheASTInMemory = false);
   ~PCHGenerator() override;
 
   void InitializeSema(Sema &S) override { SemaPtr = &S; }
diff --git a/include/clang/Serialization/ContinuousRangeMap.h b/include/clang/Serialization/ContinuousRangeMap.h
index ad827e37db2d7..0c05537dd1080 100644
--- a/include/clang/Serialization/ContinuousRangeMap.h
+++ b/include/clang/Serialization/ContinuousRangeMap.h
@@ -1,9 +1,8 @@
 //===- ContinuousRangeMap.h - Map with int range as key ---------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -74,7 +73,7 @@ public:
   }
 
   void insertOrReplace(const value_type &Val) {
-    iterator I = std::lower_bound(Rep.begin(), Rep.end(), Val, Compare());
+    iterator I = llvm::lower_bound(Rep, Val, Compare());
     if (I != Rep.end() && I->first == Val.first) {
       I->second = Val.second;
       return;
@@ -92,7 +91,7 @@ public:
   const_iterator end() const { return Rep.end(); }
 
   iterator find(Int K) {
-    iterator I = std::upper_bound(Rep.begin(), Rep.end(), K, Compare());
+    iterator I = llvm::upper_bound(Rep, K, Compare());
     // I points to the first entry with a key > K, which is the range that
     // follows the one containing K.
     if (I == Rep.begin())
diff --git a/include/clang/Serialization/GlobalModuleIndex.h b/include/clang/Serialization/GlobalModuleIndex.h
index 5791fc024a329..5f48126262247 100644
--- a/include/clang/Serialization/GlobalModuleIndex.h
+++ b/include/clang/Serialization/GlobalModuleIndex.h
@@ -1,9 +1,8 @@
 //===--- GlobalModuleIndex.h - Global Module Index --------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -21,6 +20,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Error.h"
 #include <memory>
 #include <utility>
 
@@ -123,27 +123,14 @@ class GlobalModuleIndex {
 public:
   ~GlobalModuleIndex();
 
-  /// An error code returned when trying to read an index.
-  enum ErrorCode {
-    /// No error occurred.
-    EC_None,
-    /// No index was found.
-    EC_NotFound,
-    /// Some other process is currently building the index; it is not
-    /// available yet.
-    EC_Building,
-    /// There was an unspecified I/O error reading or writing the index.
-    EC_IOError
-  };
-
   /// Read a global index file for the given directory.
   ///
   /// \param Path The path to the specific module cache where the module files
   /// for the intended configuration reside.
   ///
   /// \returns A pair containing the global module index (if it exists) and
-  /// the error code.
-  static std::pair<GlobalModuleIndex *, ErrorCode>
+  /// the error.
+  static std::pair<GlobalModuleIndex *, llvm::Error>
   readIndex(llvm::StringRef Path);
 
   /// Returns an iterator for identifiers stored in the index table.
@@ -195,9 +182,9 @@ public:
   /// creating modules.
   /// \param Path The path to the directory containing module files, into
   /// which the global index will be written.
-  static ErrorCode writeIndex(FileManager &FileMgr,
-                              const PCHContainerReader &PCHContainerRdr,
-                              llvm::StringRef Path);
+  static llvm::Error writeIndex(FileManager &FileMgr,
+                                const PCHContainerReader &PCHContainerRdr,
+                                llvm::StringRef Path);
 };
 }
 
diff --git a/include/clang/Serialization/InMemoryModuleCache.h b/include/clang/Serialization/InMemoryModuleCache.h
new file mode 100644
index 0000000000000..7b5b5c1cf1be9
--- /dev/null
+++ b/include/clang/Serialization/InMemoryModuleCache.h
@@ -0,0 +1,107 @@
+//===- InMemoryModuleCache.h - In-memory cache for modules ------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H
+#define LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H
+
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <memory>
+
+namespace clang {
+
+/// In-memory cache for modules.
+///
+/// This is a cache for modules for use across a compilation, sharing state
+/// between the CompilerInstances in an implicit modules build.  It must be
+/// shared by each CompilerInstance, ASTReader, ASTWriter, and ModuleManager
+/// that are coordinating.
+///
+/// Critically, it ensures that a single process has a consistent view of each
+/// PCM.  This is used by \a CompilerInstance when building PCMs to ensure that
+/// each \a ModuleManager sees the same files.
+class InMemoryModuleCache : public llvm::RefCountedBase<InMemoryModuleCache> {
+  struct PCM {
+    std::unique_ptr<llvm::MemoryBuffer> Buffer;
+
+    /// Track whether this PCM is known to be good (either built or
+    /// successfully imported by a CompilerInstance/ASTReader using this
+    /// cache).
+    bool IsFinal = false;
+
+    PCM() = default;
+    PCM(std::unique_ptr<llvm::MemoryBuffer> Buffer)
+        : Buffer(std::move(Buffer)) {}
+  };
+
+  /// Cache of buffers.
+  llvm::StringMap<PCM> PCMs;
+
+public:
+  /// There are four states for a PCM.  It must monotonically increase.
+  ///
+  ///  1. Unknown: the PCM has neither been read from disk nor built.
+  ///  2. Tentative: the PCM has been read from disk but not yet imported or
+  ///     built.  It might work.
+  ///  3. ToBuild: the PCM read from disk did not work but a new one has not
+  ///     been built yet.
+  ///  4. Final: indicating that the current PCM was either built in this
+  ///     process or has been successfully imported.
+  enum State { Unknown, Tentative, ToBuild, Final };
+
+  /// Get the state of the PCM.
+  State getPCMState(llvm::StringRef Filename) const;
+
+  /// Store the PCM under the Filename.
+  ///
+  /// \pre state is Unknown
+  /// \post state is Tentative
+  /// \return a reference to the buffer as a convenience.
+  llvm::MemoryBuffer &addPCM(llvm::StringRef Filename,
+                             std::unique_ptr<llvm::MemoryBuffer> Buffer);
+
+  /// Store a just-built PCM under the Filename.
+  ///
+  /// \pre state is Unknown or ToBuild.
+  /// \pre state is not Tentative.
+  /// \return a reference to the buffer as a convenience.
+  llvm::MemoryBuffer &addBuiltPCM(llvm::StringRef Filename,
+                                  std::unique_ptr<llvm::MemoryBuffer> Buffer);
+
+  /// Try to remove a buffer from the cache.  No effect if state is Final.
+  ///
+  /// \pre state is Tentative/Final.
+  /// \post Tentative => ToBuild or Final => Final.
+  /// \return false on success, i.e. if Tentative => ToBuild.
+  bool tryToDropPCM(llvm::StringRef Filename);
+
+  /// Mark a PCM as final.
+  ///
+  /// \pre state is Tentative or Final.
+  /// \post state is Final.
+  void finalizePCM(llvm::StringRef Filename);
+
+  /// Get a pointer to the pCM if it exists; else nullptr.
+  llvm::MemoryBuffer *lookupPCM(llvm::StringRef Filename) const;
+
+  /// Check whether the PCM is final and has been shown to work.
+  ///
+  /// \return true iff state is Final.
+  bool isPCMFinal(llvm::StringRef Filename) const;
+
+  /// Check whether the PCM is waiting to be built.
+  ///
+  /// \return true iff state is ToBuild.
+  bool shouldBuildPCM(llvm::StringRef Filename) const;
+};
+
+} // end namespace clang
+
+#endif // LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H
diff --git a/include/clang/Serialization/Module.h b/include/clang/Serialization/Module.h
index d6e78e693109e..1979c53a7133c 100644
--- a/include/clang/Serialization/Module.h
+++ b/include/clang/Serialization/Module.h
@@ -1,9 +1,8 @@
 //===- Module.h - Module description ----------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -25,7 +24,7 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/Bitstream/BitstreamReader.h"
 #include "llvm/Support/Endian.h"
 #include <cassert>
 #include <cstdint>
@@ -175,7 +174,7 @@ public:
   unsigned Generation;
 
   /// The memory buffer that stores the data associated with
-  /// this AST file, owned by the PCMCache in the ModuleManager.
+  /// this AST file, owned by the InMemoryModuleCache.
   llvm::MemoryBuffer *Buffer;
 
   /// The size of this file, in bits.
diff --git a/include/clang/Serialization/ModuleFileExtension.h b/include/clang/Serialization/ModuleFileExtension.h
index f70218e329af1..63562c0d6bd2b 100644
--- a/include/clang/Serialization/ModuleFileExtension.h
+++ b/include/clang/Serialization/ModuleFileExtension.h
@@ -1,9 +1,8 @@
 //===-- ModuleFileExtension.h - Module File Extensions ----------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Serialization/ModuleManager.h b/include/clang/Serialization/ModuleManager.h
index cfc9a2ef112c2..5b3b22be759c7 100644
--- a/include/clang/Serialization/ModuleManager.h
+++ b/include/clang/Serialization/ModuleManager.h
@@ -1,9 +1,8 @@
 //===- ModuleManager.cpp - Module Manager -----------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -39,7 +38,7 @@ class FileEntry;
 class FileManager;
 class GlobalModuleIndex;
 class HeaderSearch;
-class MemoryBufferCache;
+class InMemoryModuleCache;
 class ModuleMap;
 class PCHContainerReader;
 
@@ -68,7 +67,7 @@ class ModuleManager {
   FileManager &FileMgr;
 
   /// Cache of PCM files.
-  IntrusiveRefCntPtr<MemoryBufferCache> PCMCache;
+  IntrusiveRefCntPtr<InMemoryModuleCache> ModuleCache;
 
   /// Knows how to unwrap module containers.
   const PCHContainerReader &PCHContainerRdr;
@@ -140,7 +139,7 @@ public:
       SmallVectorImpl<std::unique_ptr<ModuleFile>>::reverse_iterator>;
   using ModuleOffset = std::pair<uint32_t, StringRef>;
 
-  explicit ModuleManager(FileManager &FileMgr, MemoryBufferCache &PCMCache,
+  explicit ModuleManager(FileManager &FileMgr, InMemoryModuleCache &ModuleCache,
                          const PCHContainerReader &PCHContainerRdr,
                          const HeaderSearch &HeaderSearchInfo);
   ~ModuleManager();
@@ -318,7 +317,7 @@ public:
   /// View the graphviz representation of the module graph.
   void viewGraph();
 
-  MemoryBufferCache &getPCMCache() const { return *PCMCache; }
+  InMemoryModuleCache &getModuleCache() const { return *ModuleCache; }
 };
 
 } // namespace serialization
diff --git a/include/clang/Serialization/PCHContainerOperations.h b/include/clang/Serialization/PCHContainerOperations.h
index 2a91d9830af3c..33fc4a0a24e07 100644
--- a/include/clang/Serialization/PCHContainerOperations.h
+++ b/include/clang/Serialization/PCHContainerOperations.h
@@ -1,9 +1,8 @@
 //===--- Serialization/PCHContainerOperations.h - PCH Containers --*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Serialization/SerializationDiagnostic.h b/include/clang/Serialization/SerializationDiagnostic.h
index 2decd1c2f67be..7fc93c11932f7 100644
--- a/include/clang/Serialization/SerializationDiagnostic.h
+++ b/include/clang/Serialization/SerializationDiagnostic.h
@@ -1,9 +1,8 @@
 //===--- SerializationDiagnostic.h - Serialization Diagnostics -*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//