74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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//===--- GeneratePCH.cpp - Sema Consumer for PCH Generation -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the PCHGenerator, which as a SemaConsumer that generates
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// a PCH file.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Serialization/ASTWriter.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Sema/SemaConsumer.h"
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#include "llvm/Bitcode/BitstreamWriter.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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using namespace clang;
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PCHGenerator::PCHGenerator(const Preprocessor &PP,
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StringRef OutputFile,
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clang::Module *Module,
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StringRef isysroot,
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raw_ostream *OS, bool AllowASTWithErrors)
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: PP(PP), OutputFile(OutputFile), Module(Module),
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isysroot(isysroot.str()), Out(OS),
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SemaPtr(0), Stream(Buffer), Writer(Stream),
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AllowASTWithErrors(AllowASTWithErrors),
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HasEmittedPCH(false) {
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}
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PCHGenerator::~PCHGenerator() {
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}
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void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
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// Don't create a PCH if there were fatal failures during module loading.
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if (PP.getModuleLoader().HadFatalFailure)
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return;
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bool hasErrors = PP.getDiagnostics().hasErrorOccurred();
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if (hasErrors && !AllowASTWithErrors)
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return;
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// Emit the PCH file
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assert(SemaPtr && "No Sema?");
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Writer.WriteAST(*SemaPtr, OutputFile, Module, isysroot, hasErrors);
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// Write the generated bitstream to "Out".
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Out->write((char *)&Buffer.front(), Buffer.size());
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// Make sure it hits disk now.
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Out->flush();
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// Free up some memory, in case the process is kept alive.
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Buffer.clear();
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HasEmittedPCH = true;
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}
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ASTMutationListener *PCHGenerator::GetASTMutationListener() {
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return &Writer;
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}
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ASTDeserializationListener *PCHGenerator::GetASTDeserializationListener() {
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return &Writer;
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}
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