bool DeclCollector::HandleTopLevelDecl(DeclGroupRef DGR) {
// if that decl comes from an AST File, i.e. PCH/PCM, no transaction needed
// pipe it directly to codegen.
if (comesFromASTReader(DGR)) {
if (m_CodeGen) {
for (DeclGroupRef::iterator I = DGR.begin(), E = DGR.end();
I != E; ++I) {
if (NamespaceDecl* ND = dyn_cast<NamespaceDecl>(*I)) {
for (NamespaceDecl::decl_iterator IN = ND->decls_begin(),
EN = ND->decls_end(); IN != EN; ++IN)
// Recurse over decls inside the namespace, like
// CodeGenModule::EmitNamespace() does.
HandleTopLevelDecl(DeclGroupRef(*IN));
} else {
if (!shouldIgnoreDeclFromASTReader(*I)) {
m_CodeGen->HandleTopLevelDecl(DeclGroupRef(*I));
}
// FIXME: once modules are there this is not needed anymore.
// it is used to simulate modules and the ASTDeserializationListener
// for sources that are included to describe the library that was
// built from the sources (ACLiC).
if (!(*I)->isFromASTFile() && m_Interp->getASTDeserializationListener())
m_Interp->getASTDeserializationListener()->DeclRead(0, *I);
}
}
}
return true;
}
Transaction::DelayCallInfo DCI(DGR, Transaction::kCCIHandleTopLevelDecl);
m_CurTransaction->append(DCI);
return true;
}
void DeclCollector::HandleCXXStaticMemberVarInstantiation(VarDecl *D) {
assert(m_CurTransaction && "Missing transction");
Transaction::DelayCallInfo DCI(DeclGroupRef(D),
Transaction::kCCIHandleCXXStaticMemberVarInstantiation);
m_CurTransaction->append(DCI);
if (m_Consumer
&& (!comesFromASTReader(DeclGroupRef(D))
|| !shouldIgnore(D)))
m_Consumer->HandleCXXStaticMemberVarInstantiation(D);
}
void DeclCollector::HandleTagDeclDefinition(TagDecl* TD) {
assert(m_CurTransaction && "Missing transction");
Transaction::DelayCallInfo DCI(DeclGroupRef(TD),
Transaction::kCCIHandleTagDeclDefinition);
m_CurTransaction->append(DCI);
if (m_Consumer
&& (!comesFromASTReader(DeclGroupRef(TD))
|| !shouldIgnore(TD)))
m_Consumer->HandleTagDeclDefinition(TD);
}
void DeclCollector::CompleteTentativeDefinition(VarDecl* VD) {
assert(m_CurTransaction && "Missing transction");
// C has tentative definitions which we might need to deal with when running
// in C mode.
Transaction::DelayCallInfo DCI(DeclGroupRef(VD),
Transaction::kCCICompleteTentativeDefinition);
m_CurTransaction->append(DCI);
if (m_Consumer
&& (!comesFromASTReader(DeclGroupRef(VD))
|| !shouldIgnore(VD)))
m_Consumer->CompleteTentativeDefinition(VD);
}
void DeclCollector::HandleCXXStaticMemberVarInstantiation(VarDecl *D) {
// if that decl comes from an AST File, i.e. PCH/PCM, no transaction needed
// pipe it directly to codegen.
if (comesFromASTReader(DeclGroupRef(D))) {
if (m_CodeGen && !shouldIgnoreDeclFromASTReader(D))
m_CodeGen->HandleCXXStaticMemberVarInstantiation(D);
return;
}
Transaction::DelayCallInfo DCI(DeclGroupRef(D),
Transaction::kCCIHandleCXXStaticMemberVarInstantiation);
m_CurTransaction->append(DCI);
}
void DeclCollector::HandleTagDeclDefinition(TagDecl* TD) {
// if that decl comes from an AST File, i.e. PCH/PCM, no transaction needed
// pipe it directly to codegen.
if (comesFromASTReader(DeclGroupRef(TD))) {
if (m_CodeGen)
m_CodeGen->HandleTagDeclDefinition(TD);
return;
}
Transaction::DelayCallInfo DCI(DeclGroupRef(TD),
Transaction::kCCIHandleTagDeclDefinition);
m_CurTransaction->append(DCI);
}
void DeclCollector::HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
// if that decl comes from an AST File, i.e. PCH/PCM, no transaction needed
// pipe it directly to codegen.
if (comesFromASTReader(DeclGroupRef(D))) {
if (m_CodeGen)
m_CodeGen->HandleCXXImplicitFunctionInstantiation(D);
return;
}
Transaction::DelayCallInfo DCI(DeclGroupRef(D),
Transaction::kCCIHandleCXXImplicitFunctionInstantiation);
m_CurTransaction->append(DCI);
}
void DeclCollector::CompleteTentativeDefinition(VarDecl* VD) {
// C has tentative definitions which we might need to deal with when running
// in C mode.
Transaction::DelayCallInfo DCI(DeclGroupRef(VD),
Transaction::kCCICompleteTentativeDefinition);
m_CurTransaction->append(DCI);
}
void DeclCollector::HandleVTable(CXXRecordDecl* RD) {
assert(m_CurTransaction && "Missing transction");
Transaction::DelayCallInfo DCI(DeclGroupRef(RD),
Transaction::kCCIHandleVTable);
m_CurTransaction->append(DCI);
if (m_Consumer
&& (!comesFromASTReader(DeclGroupRef(RD))
|| !shouldIgnore(RD)))
m_Consumer->HandleVTable(RD);
// Intentional no-op. It comes through Sema::DefineUsedVTables, which
// comes either Sema::ActOnEndOfTranslationUnit or while instantiating a
// template. In our case we will do it on transaction commit, without
// keeping track of used vtables, because we have cases where we bypass the
// clang/AST and directly ask the module so that we have to generate
// everything without extra smartness.
}
bool DeclCollector::HandleTopLevelDecl(DeclGroupRef DGR) {
if (!Transform(DGR))
return false;
if (DGR.isNull())
return true;
assert(m_CurTransaction && "Missing transction");
Transaction::DelayCallInfo DCI(DGR, Transaction::kCCIHandleTopLevelDecl);
m_CurTransaction->append(DCI);
if (!m_Consumer
|| getTransaction()->getIssuedDiags() == Transaction::kErrors)
return true;
if (comesFromASTReader(DGR)) {
for (DeclGroupRef::iterator DI = DGR.begin(), DE = DGR.end();
DI != DE; ++DI) {
DeclGroupRef SplitDGR(*DI);
// FIXME: The special namespace treatment (not sending itself to
// CodeGen, but only its content - if the contained decl should be
// emitted) works around issue with the static initialization when
// having a PCH and loading a library. We don't want to generate
// code for the static that will come through the library.
//
// This will be fixed with the clang::Modules. Make sure we remember.
// assert(!getCI()->getLangOpts().Modules && "Please revisit!");
if (NamespaceDecl* ND = dyn_cast<NamespaceDecl>(*DI)) {
for (NamespaceDecl::decl_iterator NDI = ND->decls_begin(),
EN = ND->decls_end(); NDI != EN; ++NDI) {
// Recurse over decls inside the namespace, like
// CodeGenModule::EmitNamespace() does.
if (!shouldIgnore(*NDI))
m_Consumer->HandleTopLevelDecl(DeclGroupRef(*NDI));
}
} else if (!shouldIgnore(*DI)) {
m_Consumer->HandleTopLevelDecl(DeclGroupRef(*DI));
}
continue;
}
} else {
m_Consumer->HandleTopLevelDecl(DGR);
}
return true;
}
void DeclCollector::HandleVTable(CXXRecordDecl* RD, bool DefinitionRequired) {
Transaction::DelayCallInfo DCI(DeclGroupRef(RD),
Transaction::kCCIHandleVTable);
m_CurTransaction->append(DCI);
// Intentional no-op. It comes through Sema::DefineUsedVTables, which
// comes either Sema::ActOnEndOfTranslationUnit or while instantiating a
// template. In our case we will do it on transaction commit, without
// keeping track of used vtables, because we have cases where we bypass the
// clang/AST and directly ask the module so that we have to generate
// everything without extra smartness.
}
void DeclCollector::HandleVTable(CXXRecordDecl* RD, bool DefinitionRequired) {
// if that decl comes from an AST File, i.e. PCH/PCM, no transaction needed
// pipe it directly to codegen.
if (comesFromASTReader(DeclGroupRef(RD))) {
// FIXME: when is the vtable part of the library?
if (m_CodeGen)
m_CodeGen->HandleVTable(RD, DefinitionRequired);
return;
}
Transaction::DelayCallInfo DCI(DeclGroupRef(RD),
Transaction::kCCIHandleVTable);
m_CurTransaction->append(DCI);
// Intentional no-op. It comes through Sema::DefineUsedVTables, which
// comes either Sema::ActOnEndOfTranslationUnit or while instantiating a
// template. In our case we will do it on transaction commit, without
// keeping track of used vtables, because we have cases where we bypass the
// clang/AST and directly ask the module so that we have to generate
// everything without extra smartness.
}
void DeclCollector::HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
Transaction::DelayCallInfo DCI(DeclGroupRef(D),
Transaction::kCCIHandleCXXImplicitFunctionInstantiation);
m_CurTransaction->append(DCI);
}
void DeclCollector::HandleTagDeclDefinition(TagDecl* TD) {
Transaction::DelayCallInfo DCI(DeclGroupRef(TD),
Transaction::kCCIHandleTagDeclDefinition);
m_CurTransaction->append(DCI);
}
ASTNodeInfo EvaluateTSynthesizer::VisitDeclStmt(DeclStmt* Node) {
// Visit all the children, which are the contents of the DeclGroupRef
for (Stmt::child_iterator
I = Node->child_begin(), E = Node->child_end(); I != E; ++I) {
if (*I) {
Expr* E = cast_or_null<Expr>(*I);
if (!E || !IsArtificiallyDependent(E))
continue;
//FIXME: don't assume there is only one decl.
assert(Node->isSingleDecl() && "There is more that one decl in stmt");
VarDecl* CuredDecl = cast_or_null<VarDecl>(Node->getSingleDecl());
assert(CuredDecl && "Not a variable declaration!");
QualType CuredDeclTy = CuredDecl->getType();
// check if the case is sometype * somevar = init;
// or some_builtin_type somevar = init;
if (CuredDecl->hasInit() && (CuredDeclTy->isAnyPointerType()
|| !CuredDeclTy->isRecordType())) {
*I = SubstituteUnknownSymbol(CuredDeclTy, CuredDecl->getInit());
continue;
}
// 1. Check whether this is the case of MyClass A(dep->symbol())
// 2. Insert the RuntimeUniverse's LifetimeHandler instance
// 3. Change the A's initializer to *(MyClass*)instance.getMemory()
// 4. Make A reference (&A)
// 5. Set the new initializer of A
if (CuredDeclTy->isLValueReferenceType())
continue;
// Set Sema's Current DeclContext to the one we need
DeclContext* OldDC = m_Sema->CurContext;
m_Sema->CurContext = CuredDecl->getDeclContext();
ASTNodeInfo NewNode;
// 2.1 Get unique name for the LifetimeHandler instance and
// initialize it
std::string UniqueName;
createUniqueName(UniqueName);
IdentifierInfo& II = m_Context->Idents.get(UniqueName);
// Prepare the initialization Exprs.
// We want to call LifetimeHandler(DynamicExprInfo* ExprInfo,
// DeclContext DC,
// const char* type)
// Interpreter* interp)
llvm::SmallVector<Expr*, 4> Inits;
// Add MyClass in LifetimeHandler unique(DynamicExprInfo* ExprInfo
// DC,
// "MyClass"
// Interpreter* Interp)
// Build Arg0 DynamicExprInfo
Inits.push_back(BuildDynamicExprInfo(E));
// Build Arg1 DeclContext* DC
QualType DCTy = m_Context->getTypeDeclType(m_DeclContextDecl);
Inits.push_back(utils::Synthesize::CStyleCastPtrExpr(m_Sema, DCTy,
(uint64_t)m_CurDeclContext)
);
// Build Arg2 llvm::StringRef
// Get the type of the type without specifiers
PrintingPolicy Policy(m_Context->getLangOpts());
Policy.SuppressTagKeyword = 1;
std::string Res;
CuredDeclTy.getAsStringInternal(Res, Policy);
Inits.push_back(ConstructConstCharPtrExpr(Res.c_str()));
// Build Arg3 cling::Interpreter
CXXScopeSpec CXXSS;
DeclarationNameInfo NameInfo(m_gCling->getDeclName(),
m_gCling->getLocStart());
Expr* gClingDRE
= m_Sema->BuildDeclarationNameExpr(CXXSS, NameInfo ,m_gCling).take();
Inits.push_back(gClingDRE);
// 2.3 Create a variable from LifetimeHandler.
QualType HandlerTy = m_Context->getTypeDeclType(m_LifetimeHandlerDecl);
TypeSourceInfo* TSI = m_Context->getTrivialTypeSourceInfo(HandlerTy,
m_NoSLoc);
VarDecl* HandlerInstance = VarDecl::Create(*m_Context,
CuredDecl->getDeclContext(),
m_NoSLoc,
m_NoSLoc,
&II,
HandlerTy,
TSI,
SC_None);
// 2.4 Call the best-match constructor. The method does overload
// resolution of the constructors and then initializes the new
// variable with it
ExprResult InitExprResult
= m_Sema->ActOnParenListExpr(m_NoSLoc,
m_NoELoc,
Inits);
m_Sema->AddInitializerToDecl(HandlerInstance,
InitExprResult.take(),
/*DirectInit*/ true,
/*TypeMayContainAuto*/ false);
// 2.5 Register the instance in the enclosing context
CuredDecl->getDeclContext()->addDecl(HandlerInstance);
NewNode.addNode(new (m_Context)
DeclStmt(DeclGroupRef(HandlerInstance),
m_NoSLoc,
m_NoELoc)
);
// 3.1 Build a DeclRefExpr, which holds the object
DeclRefExpr* MemberExprBase
= m_Sema->BuildDeclRefExpr(HandlerInstance,
HandlerTy,
VK_LValue,
m_NoSLoc
).takeAs<DeclRefExpr>();
// 3.2 Create a MemberExpr to getMemory from its declaration.
CXXScopeSpec SS;
LookupResult MemberLookup(*m_Sema, m_LHgetMemoryDecl->getDeclName(),
m_NoSLoc, Sema::LookupMemberName);
// Add the declaration as if doesn't exist.
// TODO: Check whether this is the most appropriate variant
MemberLookup.addDecl(m_LHgetMemoryDecl, AS_public);
MemberLookup.resolveKind();
Expr* MemberExpr = m_Sema->BuildMemberReferenceExpr(MemberExprBase,
HandlerTy,
m_NoSLoc,
/*IsArrow=*/false,
SS,
m_NoSLoc,
/*FirstQualifierInScope=*/0,
MemberLookup,
/*TemplateArgs=*/0
).take();
// 3.3 Build the actual call
Scope* S = m_Sema->getScopeForContext(m_Sema->CurContext);
Expr* theCall = m_Sema->ActOnCallExpr(S,
MemberExpr,
m_NoSLoc,
MultiExprArg(),
m_NoELoc).take();
// Cast to the type LHS type
Expr* Result
= utils::Synthesize::CStyleCastPtrExpr(m_Sema, CuredDeclTy, theCall);
// Cast once more (dereference the cstyle cast)
Result = m_Sema->BuildUnaryOp(S, m_NoSLoc, UO_Deref, Result).take();
// 4.
CuredDecl->setType(m_Context->getLValueReferenceType(CuredDeclTy));
// 5.
CuredDecl->setInit(Result);
NewNode.addNode(Node);
// Restore Sema's original DeclContext
m_Sema->CurContext = OldDC;
return NewNode;
}
}
return ASTNodeInfo(Node, 0);
}
void Transaction::forceAppend(Decl* D) {
forceAppend(DelayCallInfo(DeclGroupRef(D), kCCIHandleTopLevelDecl));
}
void Transaction::append(Decl* D) {
append(DeclGroupRef(D));
}
// Add the input to the memory buffer, parse it, and add it to the AST.
IncrementalParser::EParseResult
IncrementalParser::Parse(llvm::StringRef input) {
Preprocessor& PP = m_CI->getPreprocessor();
DiagnosticConsumer& DClient = m_CI->getDiagnosticClient();
PP.enableIncrementalProcessing();
DClient.BeginSourceFile(m_CI->getLangOpts(), &PP);
// Reset the transaction information
getLastTransaction().setBeforeFirstDecl(getCI()->getSema().CurContext);
if (input.size()) {
std::ostringstream source_name;
source_name << "input_line_" << (m_MemoryBuffer.size() + 1);
llvm::MemoryBuffer* MB
= llvm::MemoryBuffer::getMemBufferCopy(input, source_name.str());
m_MemoryBuffer.push_back(MB);
SourceManager& SM = getCI()->getSourceManager();
// Create SourceLocation, which will allow clang to order the overload
// candidates for example
SourceLocation NewLoc = SM.getLocForStartOfFile(m_VirtualFileID);
NewLoc = NewLoc.getLocWithOffset(m_MemoryBuffer.size() + 1);
// Create FileID for the current buffer
FileID FID = SM.createFileIDForMemBuffer(m_MemoryBuffer.back(),
/*LoadedID*/0,
/*LoadedOffset*/0, NewLoc);
PP.EnterSourceFile(FID, 0, NewLoc);
}
Parser::DeclGroupPtrTy ADecl;
while (!m_Parser->ParseTopLevelDecl(ADecl)) {
// Not end of file.
// 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) {
DeclGroupRef DGR = ADecl.getAsVal<DeclGroupRef>();
for (DeclGroupRef::iterator i=DGR.begin(); i< DGR.end(); ++i) {
if (!m_FirstTopLevelDecl)
m_FirstTopLevelDecl = *((*i)->getDeclContext()->decls_begin());
m_LastTopLevelDecl = *i;
}
m_Consumer->HandleTopLevelDecl(DGR);
} // ADecl
};
// Process any TopLevelDecls generated by #pragma weak.
for (llvm::SmallVector<Decl*,2>::iterator
I = getCI()->getSema().WeakTopLevelDecls().begin(),
E = getCI()->getSema().WeakTopLevelDecls().end(); I != E; ++I) {
m_Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
}
getCI()->getSema().PerformPendingInstantiations();
DClient.EndSourceFile();
PP.enableIncrementalProcessing(false);
DiagnosticsEngine& Diag = getCI()->getSema().getDiagnostics();
if (Diag.hasErrorOccurred())
return IncrementalParser::kFailed;
else if (Diag.getNumWarnings())
return IncrementalParser::kSuccessWithWarnings;
return IncrementalParser::kSuccess;
}
void DeclCollector::HandleCXXStaticMemberVarInstantiation(VarDecl *D) {
Transaction::DelayCallInfo DCI(DeclGroupRef(D),
Transaction::kCCIHandleCXXStaticMemberVarInstantiation);
m_CurTransaction->append(DCI);
}
bool DeclExtractor::ExtractDecl(Decl* D) {
FunctionDecl* FD = dyn_cast<FunctionDecl>(D);
if (FD) {
if (FD->getNameAsString().find("__cling_Un1Qu3"))
return true;
llvm::SmallVector<NamedDecl*, 4> TouchedDecls;
CompoundStmt* CS = dyn_cast<CompoundStmt>(FD->getBody());
assert(CS && "Function body not a CompoundStmt?");
DeclContext* DC = FD->getTranslationUnitDecl();
Scope* TUScope = m_Sema->TUScope;
assert(TUScope == m_Sema->getScopeForContext(DC) && "TU scope from DC?");
llvm::SmallVector<Stmt*, 4> Stmts;
for (CompoundStmt::body_iterator I = CS->body_begin(), EI = CS->body_end();
I != EI; ++I) {
DeclStmt* DS = dyn_cast<DeclStmt>(*I);
if (!DS) {
Stmts.push_back(*I);
continue;
}
for (DeclStmt::decl_iterator J = DS->decl_begin();
J != DS->decl_end(); ++J) {
NamedDecl* ND = dyn_cast<NamedDecl>(*J);
if (ND) {
DeclContext* OldDC = ND->getDeclContext();
// Make sure the decl is not found at its old possition
OldDC->removeDecl(ND);
if (Scope* S = m_Sema->getScopeForContext(OldDC)) {
S->RemoveDecl(ND);
m_Sema->IdResolver.RemoveDecl(ND);
}
if (ND->getDeclContext() == ND->getLexicalDeclContext())
ND->setLexicalDeclContext(DC);
else
assert("Not implemented: Decl with different lexical context");
ND->setDeclContext(DC);
if (VarDecl* VD = dyn_cast<VarDecl>(ND)) {
VD->setStorageClass(SC_None);
VD->setStorageClassAsWritten(SC_None);
// if we want to print the result of the initializer of int i = 5
// or the default initializer int i
if (I+1 == EI || !isa<NullStmt>(*(I+1))) {
QualType VDTy = VD->getType().getNonReferenceType();
Expr* DRE = m_Sema->BuildDeclRefExpr(VD, VDTy,VK_LValue,
SourceLocation()
).take();
Stmts.push_back(DRE);
}
}
// force recalc of the linkage (to external)
ND->ClearLinkageCache();
TouchedDecls.push_back(ND);
}
}
}
bool hasNoErrors = !CheckForClashingNames(TouchedDecls, DC, TUScope);
if (hasNoErrors) {
for (size_t i = 0; i < TouchedDecls.size(); ++i) {
m_Sema->PushOnScopeChains(TouchedDecls[i],
m_Sema->getScopeForContext(DC),
/*AddCurContext*/!isa<UsingDirectiveDecl>(TouchedDecls[i]));
// The transparent DeclContexts (eg. scopeless enum) doesn't have
// scopes. While extracting their contents we need to update the
// lookup tables and telling them to pick up the new possitions
// in the AST.
if (DeclContext* InnerDC = dyn_cast<DeclContext>(TouchedDecls[i])) {
if (InnerDC->isTransparentContext()) {
// We can't PushDeclContext, because we don't have scope.
Sema::ContextRAII pushedDC(*m_Sema, InnerDC);
for(DeclContext::decl_iterator DI = InnerDC->decls_begin(),
DE = InnerDC->decls_end(); DI != DE ; ++DI) {
if (NamedDecl* ND = dyn_cast<NamedDecl>(*DI))
InnerDC->makeDeclVisibleInContext(ND);
}
}
}
// Append the new top level decl to the current transaction.
getTransaction()->appendUnique(DeclGroupRef(TouchedDecls[i]));
}
}
CS->setStmts(*m_Context, Stmts.data(), Stmts.size());
// Put the wrapper after its declarations. (Nice when AST dumping)
DC->removeDecl(FD);
DC->addDecl(FD);
return hasNoErrors;
}
return true;
}
bool DeclCollector::comesFromASTReader(const Decl* D) const {
// The operation is const but clang::DeclGroupRef doesn't allow us to
// express it.
return comesFromASTReader(DeclGroupRef(const_cast<Decl*>(D)));
}
// Add the input to the memory buffer, parse it, and add it to the AST.
IncrementalParser::EParseResult
IncrementalParser::ParseInternal(llvm::StringRef input) {
if (input.empty()) return IncrementalParser::kSuccess;
Sema& S = getCI()->getSema();
assert(!(S.getLangOpts().Modules
&& m_Consumer->getTransaction()->getCompilationOpts()
.CodeGenerationForModule)
&& "CodeGenerationForModule should be removed once modules are available!");
// Recover resources if we crash before exiting this method.
llvm::CrashRecoveryContextCleanupRegistrar<Sema> CleanupSema(&S);
Preprocessor& PP = m_CI->getPreprocessor();
if (!PP.getCurrentLexer()) {
PP.EnterSourceFile(m_CI->getSourceManager().getMainFileID(),
0, SourceLocation());
}
assert(PP.isIncrementalProcessingEnabled() && "Not in incremental mode!?");
PP.enableIncrementalProcessing();
std::ostringstream source_name;
source_name << "input_line_" << (m_MemoryBuffers.size() + 1);
// Create an uninitialized memory buffer, copy code in and append "\n"
size_t InputSize = input.size(); // don't include trailing 0
// MemBuffer size should *not* include terminating zero
llvm::MemoryBuffer* MB
= llvm::MemoryBuffer::getNewUninitMemBuffer(InputSize + 1,
source_name.str());
char* MBStart = const_cast<char*>(MB->getBufferStart());
memcpy(MBStart, input.data(), InputSize);
memcpy(MBStart + InputSize, "\n", 2);
m_MemoryBuffers.push_back(MB);
SourceManager& SM = getCI()->getSourceManager();
// Create SourceLocation, which will allow clang to order the overload
// candidates for example
SourceLocation NewLoc = SM.getLocForStartOfFile(m_VirtualFileID);
NewLoc = NewLoc.getLocWithOffset(m_MemoryBuffers.size() + 1);
// Create FileID for the current buffer
FileID FID = SM.createFileIDForMemBuffer(m_MemoryBuffers.back(),
SrcMgr::C_User,
/*LoadedID*/0,
/*LoadedOffset*/0, NewLoc);
PP.EnterSourceFile(FID, /*DirLookup*/0, NewLoc);
Parser::DeclGroupPtrTy ADecl;
while (!m_Parser->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)
m_Consumer->HandleTopLevelDecl(ADecl.getAsVal<DeclGroupRef>());
};
// Process any TopLevelDecls generated by #pragma weak.
for (llvm::SmallVector<Decl*,2>::iterator I = S.WeakTopLevelDecls().begin(),
E = S.WeakTopLevelDecls().end(); I != E; ++I) {
m_Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
}
DiagnosticsEngine& Diag = S.getDiagnostics();
if (Diag.hasErrorOccurred())
return IncrementalParser::kFailed;
else if (Diag.getNumWarnings())
return IncrementalParser::kSuccessWithWarnings;
return IncrementalParser::kSuccess;
}
// Add the input to the memory buffer, parse it, and add it to the AST.
IncrementalParser::EParseResult
IncrementalParser::ParseInternal(llvm::StringRef input) {
if (input.empty()) return IncrementalParser::kSuccess;
Sema& S = getCI()->getSema();
const CompilationOptions& CO
= m_Consumer->getTransaction()->getCompilationOpts();
assert(!(S.getLangOpts().Modules
&& CO.CodeGenerationForModule)
&& "CodeGenerationForModule to be removed once PCMs are available!");
// Recover resources if we crash before exiting this method.
llvm::CrashRecoveryContextCleanupRegistrar<Sema> CleanupSema(&S);
Preprocessor& PP = m_CI->getPreprocessor();
if (!PP.getCurrentLexer()) {
PP.EnterSourceFile(m_CI->getSourceManager().getMainFileID(),
0, SourceLocation());
}
assert(PP.isIncrementalProcessingEnabled() && "Not in incremental mode!?");
PP.enableIncrementalProcessing();
smallstream source_name;
source_name << "input_line_" << (m_MemoryBuffers.size() + 1);
// Create an uninitialized memory buffer, copy code in and append "\n"
size_t InputSize = input.size(); // don't include trailing 0
// MemBuffer size should *not* include terminating zero
std::unique_ptr<llvm::MemoryBuffer>
MB(llvm::MemoryBuffer::getNewUninitMemBuffer(InputSize + 1,
source_name.str()));
char* MBStart = const_cast<char*>(MB->getBufferStart());
memcpy(MBStart, input.data(), InputSize);
MBStart[InputSize] = '\n';
SourceManager& SM = getCI()->getSourceManager();
// Create SourceLocation, which will allow clang to order the overload
// candidates for example
SourceLocation NewLoc = getLastMemoryBufferEndLoc().getLocWithOffset(1);
llvm::MemoryBuffer* MBNonOwn = MB.get();
// Create FileID for the current buffer.
FileID FID;
// Create FileEntry and FileID for the current buffer.
// Enabling the completion point only works on FileEntries.
const clang::FileEntry* FE
= SM.getFileManager().getVirtualFile(source_name.str(), InputSize,
0 /* mod time*/);
SM.overrideFileContents(FE, std::move(MB));
FID = SM.createFileID(FE, NewLoc, SrcMgr::C_User);
if (CO.CodeCompletionOffset != -1) {
// The completion point is set one a 1-based line/column numbering.
// It relies on the implementation to account for the wrapper extra line.
PP.SetCodeCompletionPoint(FE, 1/* start point 1-based line*/,
CO.CodeCompletionOffset+1/* 1-based column*/);
}
m_MemoryBuffers.push_back(std::make_pair(MBNonOwn, FID));
// NewLoc only used for diags.
PP.EnterSourceFile(FID, /*DirLookup*/0, NewLoc);
m_Consumer->getTransaction()->setBufferFID(FID);
DiagnosticsEngine& Diags = getCI()->getDiagnostics();
FilteringDiagConsumer::RAAI RAAITmp(*m_DiagConsumer, CO.IgnorePromptDiags);
DiagnosticErrorTrap Trap(Diags);
Sema::SavePendingInstantiationsRAII SavedPendingInstantiations(S);
Parser::DeclGroupPtrTy ADecl;
while (!m_Parser->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 (Trap.hasErrorOccurred())
m_Consumer->getTransaction()->setIssuedDiags(Transaction::kErrors);
if (ADecl)
m_Consumer->HandleTopLevelDecl(ADecl.get());
};
// If never entered the while block, there's a chance an error occured
if (Trap.hasErrorOccurred())
m_Consumer->getTransaction()->setIssuedDiags(Transaction::kErrors);
if (CO.CodeCompletionOffset != -1) {
assert((int)SM.getFileOffset(PP.getCodeCompletionLoc())
== CO.CodeCompletionOffset
&& "Completion point wrongly set!");
assert(PP.isCodeCompletionReached()
&& "Code completion set but not reached!");
// Let's ignore this transaction:
m_Consumer->getTransaction()->setIssuedDiags(Transaction::kErrors);
return kSuccess;
}
#ifdef LLVM_ON_WIN32
// Microsoft-specific:
// Late parsed templates can leave unswallowed "macro"-like tokens.
// They will seriously confuse the Parser when entering the next
// source file. So lex until we are EOF.
Token Tok;
do {
PP.Lex(Tok);
} while (Tok.isNot(tok::eof));
#endif
#ifndef NDEBUG
Token AssertTok;
PP.Lex(AssertTok);
assert(AssertTok.is(tok::eof) && "Lexer must be EOF when starting incremental parse!");
#endif
// Process any TopLevelDecls generated by #pragma weak.
for (llvm::SmallVector<Decl*,2>::iterator I = S.WeakTopLevelDecls().begin(),
E = S.WeakTopLevelDecls().end(); I != E; ++I) {
m_Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
}
if (m_Consumer->getTransaction()->getIssuedDiags() == Transaction::kErrors)
return kFailed;
else if (Diags.getNumWarnings())
return kSuccessWithWarnings;
return kSuccess;
}
