Move ASTConsumers.h to include/clang/Frontend, and move the associated
.cpp files to lib/Frontend. (As proposed on cfe-dev.)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72060 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/GeneratePCH.cpp b/lib/Frontend/GeneratePCH.cpp
new file mode 100644
index 0000000..8be88ce
--- /dev/null
+++ b/lib/Frontend/GeneratePCH.cpp
@@ -0,0 +1,78 @@
+//===--- 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/Frontend/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/System/Path.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Streams.h"
+#include <string>
+
+using namespace clang;
+using namespace llvm;
+
+namespace {
+ class VISIBILITY_HIDDEN PCHGenerator : public SemaConsumer {
+ const Preprocessor &PP;
+ llvm::raw_ostream *Out;
+ Sema *SemaPtr;
+ MemorizeStatCalls *StatCalls; // owned by the FileManager
+
+ public:
+ explicit PCHGenerator(const Preprocessor &PP, llvm::raw_ostream *Out);
+ virtual void InitializeSema(Sema &S) { SemaPtr = &S; }
+ virtual void HandleTranslationUnit(ASTContext &Ctx);
+ };
+}
+
+PCHGenerator::PCHGenerator(const Preprocessor &PP, llvm::raw_ostream *OS)
+ : PP(PP), Out(OS), SemaPtr(0), StatCalls(0) {
+
+ // Install a stat() listener to keep track of all of the stat()
+ // calls.
+ StatCalls = new MemorizeStatCalls;
+ PP.getFileManager().setStatCache(StatCalls);
+}
+
+void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
+ if (PP.getDiagnostics().hasErrorOccurred())
+ return;
+
+ // Write the PCH contents into a buffer
+ std::vector<unsigned char> Buffer;
+ BitstreamWriter Stream(Buffer);
+ PCHWriter Writer(Stream);
+
+ // Emit the PCH file
+ assert(SemaPtr && "No Sema?");
+ Writer.WritePCH(*SemaPtr, StatCalls);
+
+ // Write the generated bitstream to "Out".
+ Out->write((char *)&Buffer.front(), Buffer.size());
+
+ // Make sure it hits disk now.
+ Out->flush();
+}
+
+ASTConsumer *clang::CreatePCHGenerator(const Preprocessor &PP,
+ llvm::raw_ostream *OS) {
+ return new PCHGenerator(PP, OS);
+}