void IncrementalParser::Initialize() {
if (hasCodeGenerator())
getCodeGenerator()->Initialize(getCI()->getASTContext());
CompilationOptions CO;
CO.DeclarationExtraction = 0;
CO.ValuePrinting = CompilationOptions::VPDisabled;
CO.CodeGeneration = hasCodeGenerator();
// pull in PCHs
const std::string& PCHFileName
= m_CI->getInvocation ().getPreprocessorOpts().ImplicitPCHInclude;
if (!PCHFileName.empty()) {
Transaction* CurT = beginTransaction(CO);
m_CI->createPCHExternalASTSource(PCHFileName,
true /*DisablePCHValidation*/,
true /*AllowPCHWithCompilerErrors*/,
0 /*DeserializationListener*/);
Transaction* EndedT = endTransaction(CurT);
commitTransaction(EndedT);
}
Transaction* CurT = beginTransaction(CO);
Sema* TheSema = &m_CI->getSema();
m_Parser.reset(new Parser(m_CI->getPreprocessor(), *TheSema,
false /*skipFuncBodies*/));
m_CI->getPreprocessor().EnterMainSourceFile();
// Initialize the parser after we have entered the main source file.
m_Parser->Initialize();
// Perform initialization that occurs after the parser has been initialized
// but before it parses anything. Initializes the consumers too.
TheSema->Initialize();
ExternalASTSource *External = TheSema->getASTContext().getExternalSource();
if (External)
External->StartTranslationUnit(m_Consumer);
Transaction* EndedT = endTransaction(CurT);
commitTransaction(EndedT);
}
void clang::ParseAST(Sema &S, bool PrintStats, bool SkipFunctionBodies) {
// Collect global stats on Decls/Stmts (until we have a module streamer).
if (PrintStats) {
Decl::EnableStatistics();
Stmt::EnableStatistics();
}
// Also turn on collection of stats inside of the Sema object.
bool OldCollectStats = PrintStats;
std::swap(OldCollectStats, S.CollectStats);
ASTConsumer *Consumer = &S.getASTConsumer();
OwningPtr<Parser> ParseOP(new Parser(S.getPreprocessor(), S,
SkipFunctionBodies));
Parser &P = *ParseOP.get();
PrettyStackTraceParserEntry CrashInfo(P);
// Recover resources if we crash before exiting this method.
llvm::CrashRecoveryContextCleanupRegistrar<Parser>
CleanupParser(ParseOP.get());
S.getPreprocessor().EnterMainSourceFile();
P.Initialize();
S.Initialize();
// C11 6.9p1 says translation units must have at least one top-level
// declaration. C++ doesn't have this restriction. We also don't want to
// complain if we have a precompiled header, although technically if the PCH
// is empty we should still emit the (pedantic) diagnostic.
Parser::DeclGroupPtrTy ADecl;
ExternalASTSource *External = S.getASTContext().getExternalSource();
if (External)
External->StartTranslationUnit(Consumer);
if (P.ParseTopLevelDecl(ADecl)) {
if (!External && !S.getLangOpts().CPlusPlus)
P.Diag(diag::ext_empty_translation_unit);
} else {
do {
// If we got a null return and something *was* parsed, ignore it. This
// is due to a top-level semicolon, an action override, or a parse error
// skipping something.
if (ADecl && !Consumer->HandleTopLevelDecl(ADecl.get()))
return;
} while (!P.ParseTopLevelDecl(ADecl));
}
// Process any TopLevelDecls generated by #pragma weak.
for (SmallVector<Decl*,2>::iterator
I = S.WeakTopLevelDecls().begin(),
E = S.WeakTopLevelDecls().end(); I != E; ++I)
Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
Consumer->HandleTranslationUnit(S.getASTContext());
std::swap(OldCollectStats, S.CollectStats);
if (PrintStats) {
llvm::errs() << "\nSTATISTICS:\n";
P.getActions().PrintStats();
S.getASTContext().PrintStats();
Decl::PrintStats();
Stmt::PrintStats();
Consumer->PrintStats();
}
}
