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();
}
}
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);
// Initialize the template instantiation observer chain.
// FIXME: See note on "finalize" below.
initialize(S.TemplateInstCallbacks, S);
ASTConsumer *Consumer = &S.getASTConsumer();
std::unique_ptr<Parser> ParseOP(
new Parser(S.getPreprocessor(), S, SkipFunctionBodies));
Parser &P = *ParseOP.get();
llvm::CrashRecoveryContextCleanupRegistrar<const void, ResetStackCleanup>
CleanupPrettyStack(llvm::SavePrettyStackState());
PrettyStackTraceParserEntry CrashInfo(P);
// Recover resources if we crash before exiting this method.
llvm::CrashRecoveryContextCleanupRegistrar<Parser>
CleanupParser(ParseOP.get());
S.getPreprocessor().EnterMainSourceFile();
P.Initialize();
Parser::DeclGroupPtrTy ADecl;
ExternalASTSource *External = S.getASTContext().getExternalSource();
if (External)
External->StartTranslationUnit(Consumer);
for (bool AtEOF = P.ParseFirstTopLevelDecl(ADecl); !AtEOF;
AtEOF = P.ParseTopLevelDecl(ADecl)) {
// 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;
}
// Process any TopLevelDecls generated by #pragma weak.
for (Decl *D : S.WeakTopLevelDecls())
Consumer->HandleTopLevelDecl(DeclGroupRef(D));
Consumer->HandleTranslationUnit(S.getASTContext());
// Finalize the template instantiation observer chain.
// FIXME: This (and init.) should be done in the Sema class, but because
// Sema does not have a reliable "Finalize" function (it has a
// destructor, but it is not guaranteed to be called ("-disable-free")).
// So, do the initialization above and do the finalization here:
finalize(S.TemplateInstCallbacks, S);
std::swap(OldCollectStats, S.CollectStats);
if (PrintStats) {
llvm::errs() << "\nSTATISTICS:\n";
P.getActions().PrintStats();
S.getASTContext().PrintStats();
Decl::PrintStats();
Stmt::PrintStats();
Consumer->PrintStats();
}
}