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cb28f9d7ad
MacroInfo*. Instead of simply dumping an offset into the current file, give each macro definition a proper ID with all of the standard modules-remapping facilities. Additionally, when a macro is modified in a subsequent AST file (e.g., #undef'ing a macro loaded from another module or from a precompiled header), provide a macro update record rather than rewriting the entire macro definition. This gives us greater consistency with the way we handle declarations, and ties together macro definitions much more cleanly. Note that we're still not actually deserializing macro history (we never were), but it's far easy to do properly now. llvm-svn: 165560
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
//===--- 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/Sema/SemaConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/FileSystemStatCache.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)
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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), StatCalls(0), Stream(Buffer), Writer(Stream) {
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// Install a stat() listener to keep track of all of the stat()
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// calls.
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StatCalls = new MemorizeStatCalls();
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PP.getFileManager().addStatCache(StatCalls, /*AtBeginning=*/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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if (PP.getDiagnostics().hasErrorOccurred())
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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, StatCalls, OutputFile, Module, isysroot);
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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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}
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PPMutationListener *PCHGenerator::GetPPMutationListener() {
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return &Writer;
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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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