Reintroduce the serialization library, with fixed dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111279 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/GeneratePCH.cpp b/lib/Serialization/GeneratePCH.cpp
new file mode 100644
index 0000000..55eaa9c
--- /dev/null
+++ b/lib/Serialization/GeneratePCH.cpp
@@ -0,0 +1,64 @@
+//===--- GeneratePCH.cpp - AST Consumer for PCH Generation ------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the CreatePCHGenerate function, which creates an
+// ASTConsume that generates a PCH file.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/ASTConsumers.h"
+#include "clang/Serialization/PCHWriter.h"
+#include "clang/Sema/SemaConsumer.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/FileManager.h"
+#include "llvm/Bitcode/BitstreamWriter.h"
+#include "llvm/Support/raw_ostream.h"
+#include <string>
+
+using namespace clang;
+
+PCHGenerator::PCHGenerator(const Preprocessor &PP,
+ bool Chaining,
+ const char *isysroot,
+ llvm::raw_ostream *OS)
+ : PP(PP), isysroot(isysroot), Out(OS), SemaPtr(0),
+ StatCalls(0), Stream(Buffer), Writer(Stream) {
+
+ // Install a stat() listener to keep track of all of the stat()
+ // calls.
+ StatCalls = new MemorizeStatCalls;
+ // If we have a chain, we want new stat calls only, so install the memorizer
+ // *after* the already installed PCHReader's stat cache.
+ PP.getFileManager().addStatCache(StatCalls,
+ /*AtBeginning=*/!Chaining);
+}
+
+void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
+ if (PP.getDiagnostics().hasErrorOccurred())
+ return;
+
+ // Emit the PCH file
+ assert(SemaPtr && "No Sema?");
+ Writer.WritePCH(*SemaPtr, StatCalls, isysroot);
+
+ // Write the generated bitstream to "Out".
+ Out->write((char *)&Buffer.front(), Buffer.size());
+
+ // Make sure it hits disk now.
+ Out->flush();
+
+ // Free up some memory, in case the process is kept alive.
+ Buffer.clear();
+}
+
+PCHDeserializationListener *PCHGenerator::GetPCHDeserializationListener() {
+ return &Writer;
+}