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//===--- GeneratePCH.cpp - Sema 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 PCHGenerator, which as a SemaConsumer that generates
// a PCH file.
//
//===----------------------------------------------------------------------===//
#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 "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
using namespace clang;
PCHGenerator::PCHGenerator(const Preprocessor &PP, StringRef OutputFile,
clang::Module *Module, StringRef isysroot,
std::shared_ptr<PCHBuffer> Buffer,
bool AllowASTWithErrors)
: PP(PP), OutputFile(OutputFile), Module(Module), isysroot(isysroot.str()),
SemaPtr(nullptr), Buffer(Buffer), Stream(Buffer->Data), Writer(Stream),
AllowASTWithErrors(AllowASTWithErrors) {
Buffer->IsComplete = false;
}
PCHGenerator::~PCHGenerator() {
}
void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
// Don't create a PCH if there were fatal failures during module loading.
if (PP.getModuleLoader().HadFatalFailure)
return;
bool hasErrors = PP.getDiagnostics().hasErrorOccurred();
if (hasErrors && !AllowASTWithErrors)
return;
// Emit the PCH file to the Buffer.
assert(SemaPtr && "No Sema?");
Writer.WriteAST(*SemaPtr, OutputFile, Module, isysroot, hasErrors);
Buffer->IsComplete = true;
}
ASTMutationListener *PCHGenerator::GetASTMutationListener() {
return &Writer;
}
ASTDeserializationListener *PCHGenerator::GetASTDeserializationListener() {
return &Writer;
}
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