forked from OSchip/llvm-project
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//===--- 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,
|
|
raw_ostream *OS, bool AllowASTWithErrors)
|
|
: PP(PP), OutputFile(OutputFile), Module(Module),
|
|
isysroot(isysroot.str()), Out(OS),
|
|
SemaPtr(nullptr), Stream(Buffer), Writer(Stream),
|
|
AllowASTWithErrors(AllowASTWithErrors),
|
|
HasEmittedPCH(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
|
|
assert(SemaPtr && "No Sema?");
|
|
Writer.WriteAST(*SemaPtr, OutputFile, Module, isysroot, hasErrors);
|
|
|
|
// 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();
|
|
|
|
HasEmittedPCH = true;
|
|
}
|
|
|
|
ASTMutationListener *PCHGenerator::GetASTMutationListener() {
|
|
return &Writer;
|
|
}
|
|
|
|
ASTDeserializationListener *PCHGenerator::GetASTDeserializationListener() {
|
|
return &Writer;
|
|
}
|