[NFC] Header cleanup

Summary: Removed unused headers, replaced some headers with forward class declarations

Patch by: Eugene <claprix@yandex.ru>

Differential Revision: https://reviews.llvm.org/D20100

llvm-svn: 275882
diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index 4fd7aeb..9094a01 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -12,10 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Serialization/ASTReader.h"
 #include "ASTCommon.h"
 #include "ASTReaderInternals.h"
-#include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclGroup.h"
@@ -24,6 +22,7 @@
 #include "clang/AST/Expr.h"
 #include "clang/Sema/IdentifierResolver.h"
 #include "clang/Sema/SemaDiagnostic.h"
+#include "clang/Serialization/ASTReader.h"
 #include "llvm/Support/SaveAndRestore.h"
 
 using namespace clang;
diff --git a/clang/lib/Serialization/ASTReaderInternals.h b/clang/lib/Serialization/ASTReaderInternals.h
index d392364..250c8b1 100644
--- a/clang/lib/Serialization/ASTReaderInternals.h
+++ b/clang/lib/Serialization/ASTReaderInternals.h
@@ -13,14 +13,12 @@
 #ifndef LLVM_CLANG_LIB_SERIALIZATION_ASTREADERINTERNALS_H
 #define LLVM_CLANG_LIB_SERIALIZATION_ASTREADERINTERNALS_H
 
+#include "MultiOnDiskHashTable.h"
 #include "clang/AST/DeclarationName.h"
 #include "clang/Serialization/ASTBitCodes.h"
 #include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/PointerUnion.h"
-#include "llvm/ADT/TinyPtrVector.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/OnDiskHashTable.h"
-#include "MultiOnDiskHashTable.h"
 #include <utility>
 
 namespace clang {
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index bb6a8ae..314eee0 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -12,7 +12,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Serialization/ASTWriter.h"
-#include "clang/Serialization/ModuleFileExtension.h"
 #include "ASTCommon.h"
 #include "ASTReaderInternals.h"
 #include "MultiOnDiskHashTable.h"
@@ -44,6 +43,7 @@
 #include "clang/Sema/IdentifierResolver.h"
 #include "clang/Sema/Sema.h"
 #include "clang/Serialization/ASTReader.h"
+#include "clang/Serialization/ModuleFileExtension.h"
 #include "clang/Serialization/SerializationDiagnostic.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/APInt.h"
@@ -52,7 +52,6 @@
 #include "llvm/Bitcode/BitstreamWriter.h"
 #include "llvm/Support/Compression.h"
 #include "llvm/Support/EndianStream.h"
-#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/OnDiskHashTable.h"
 #include "llvm/Support/Path.h"
diff --git a/clang/lib/Serialization/ASTWriterDecl.cpp b/clang/lib/Serialization/ASTWriterDecl.cpp
index 23d1854..50c5385 100644
--- a/clang/lib/Serialization/ASTWriterDecl.cpp
+++ b/clang/lib/Serialization/ASTWriterDecl.cpp
@@ -11,7 +11,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Serialization/ASTWriter.h"
 #include "ASTCommon.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclContextInternals.h"
@@ -20,7 +19,7 @@
 #include "clang/AST/Expr.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Serialization/ASTReader.h"
-#include "llvm/ADT/Twine.h"
+#include "clang/Serialization/ASTWriter.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
 #include "llvm/Support/ErrorHandling.h"
 using namespace clang;
diff --git a/clang/lib/Serialization/GeneratePCH.cpp b/clang/lib/Serialization/GeneratePCH.cpp
index 308fde8..47dce37 100644
--- a/clang/lib/Serialization/GeneratePCH.cpp
+++ b/clang/lib/Serialization/GeneratePCH.cpp
@@ -12,14 +12,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Serialization/ASTWriter.h"
-#include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
-#include "clang/Basic/FileManager.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Sema/SemaConsumer.h"
+#include "clang/Serialization/ASTWriter.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
-#include <string>
 
 using namespace clang;
 
diff --git a/clang/lib/Serialization/Module.cpp b/clang/lib/Serialization/Module.cpp
index ca0cb3c..72b0861 100644
--- a/clang/lib/Serialization/Module.cpp
+++ b/clang/lib/Serialization/Module.cpp
@@ -13,7 +13,6 @@
 //===----------------------------------------------------------------------===//
 #include "clang/Serialization/Module.h"
 #include "ASTReaderInternals.h"
-#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace clang;
diff --git a/clang/lib/Serialization/ModuleFileExtension.cpp b/clang/lib/Serialization/ModuleFileExtension.cpp
index 81dcfd6..5bd0a1c 100644
--- a/clang/lib/Serialization/ModuleFileExtension.cpp
+++ b/clang/lib/Serialization/ModuleFileExtension.cpp
@@ -8,7 +8,6 @@
 //===----------------------------------------------------------------------===//
 #include "clang/Serialization/ModuleFileExtension.h"
 #include "llvm/ADT/Hashing.h"
-#include "llvm/Support/raw_ostream.h"
 using namespace clang;
 
 ModuleFileExtension::~ModuleFileExtension() { }
diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp
index 292f36d..8692f9e 100644
--- a/clang/lib/Serialization/ModuleManager.cpp
+++ b/clang/lib/Serialization/ModuleManager.cpp
@@ -11,14 +11,13 @@
 //  modules for the ASTReader.
 //
 //===----------------------------------------------------------------------===//
+#include "clang/Serialization/ModuleManager.h"
 #include "clang/Frontend/PCHContainerOperations.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/ModuleMap.h"
 #include "clang/Serialization/GlobalModuleIndex.h"
-#include "clang/Serialization/ModuleManager.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
-#include "llvm/Support/raw_ostream.h"
 #include <system_error>
 
 #ifndef NDEBUG
diff --git a/clang/lib/Serialization/MultiOnDiskHashTable.h b/clang/lib/Serialization/MultiOnDiskHashTable.h
index 04dea83..fdbbb60 100644
--- a/clang/lib/Serialization/MultiOnDiskHashTable.h
+++ b/clang/lib/Serialization/MultiOnDiskHashTable.h
@@ -18,7 +18,11 @@
 #ifndef LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
 #define LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
 
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/PointerUnion.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/TinyPtrVector.h"
 #include "llvm/Support/EndianStream.h"
 #include "llvm/Support/OnDiskHashTable.h"