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clang-1/lib/Frontend/PCHReaderDecl.cpp

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25 KiB
C++
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//===--- PCHReaderDecl.cpp - Decl Deserialization ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the PCHReader::ReadDeclRecord method, which is the
// entrypoint for loading a decl.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/PCHReader.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/DeclGroup.h"
#include "clang/AST/Expr.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Declaration deserialization
//===----------------------------------------------------------------------===//
namespace {
class PCHDeclReader : public DeclVisitor<PCHDeclReader, void> {
PCHReader &Reader;
const PCHReader::RecordData &Record;
unsigned &Idx;
public:
PCHDeclReader(PCHReader &Reader, const PCHReader::RecordData &Record,
unsigned &Idx)
: Reader(Reader), Record(Record), Idx(Idx) { }
void VisitDecl(Decl *D);
void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
void VisitNamedDecl(NamedDecl *ND);
void VisitTypeDecl(TypeDecl *TD);
void VisitTypedefDecl(TypedefDecl *TD);
void VisitTagDecl(TagDecl *TD);
void VisitEnumDecl(EnumDecl *ED);
void VisitRecordDecl(RecordDecl *RD);
void VisitValueDecl(ValueDecl *VD);
void VisitEnumConstantDecl(EnumConstantDecl *ECD);
void VisitFunctionDecl(FunctionDecl *FD);
void VisitFieldDecl(FieldDecl *FD);
void VisitVarDecl(VarDecl *VD);
void VisitImplicitParamDecl(ImplicitParamDecl *PD);
void VisitParmVarDecl(ParmVarDecl *PD);
void VisitOriginalParmVarDecl(OriginalParmVarDecl *PD);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
void VisitBlockDecl(BlockDecl *BD);
std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
void VisitObjCMethodDecl(ObjCMethodDecl *D);
void VisitObjCContainerDecl(ObjCContainerDecl *D);
void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
void VisitObjCIvarDecl(ObjCIvarDecl *D);
void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
void VisitObjCClassDecl(ObjCClassDecl *D);
void VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
void VisitObjCImplDecl(ObjCImplDecl *D);
void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
};
}
void PCHDeclReader::VisitDecl(Decl *D) {
D->setDeclContext(cast_or_null<DeclContext>(Reader.GetDecl(Record[Idx++])));
D->setLexicalDeclContext(
cast_or_null<DeclContext>(Reader.GetDecl(Record[Idx++])));
D->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
D->setInvalidDecl(Record[Idx++]);
if (Record[Idx++])
D->addAttr(Reader.ReadAttributes());
D->setImplicit(Record[Idx++]);
D->setAccess((AccessSpecifier)Record[Idx++]);
}
void PCHDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
VisitDecl(TU);
}
void PCHDeclReader::VisitNamedDecl(NamedDecl *ND) {
VisitDecl(ND);
ND->setDeclName(Reader.ReadDeclarationName(Record, Idx));
}
void PCHDeclReader::VisitTypeDecl(TypeDecl *TD) {
VisitNamedDecl(TD);
TD->setTypeForDecl(Reader.GetType(Record[Idx++]).getTypePtr());
}
void PCHDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
// Note that we cannot use VisitTypeDecl here, because we need to
// set the underlying type of the typedef *before* we try to read
// the type associated with the TypedefDecl.
VisitNamedDecl(TD);
TD->setUnderlyingType(Reader.GetType(Record[Idx + 1]));
TD->setTypeForDecl(Reader.GetType(Record[Idx]).getTypePtr());
Idx += 2;
}
void PCHDeclReader::VisitTagDecl(TagDecl *TD) {
VisitTypeDecl(TD);
TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
TD->setDefinition(Record[Idx++]);
TD->setTypedefForAnonDecl(
cast_or_null<TypedefDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitEnumDecl(EnumDecl *ED) {
VisitTagDecl(ED);
ED->setIntegerType(Reader.GetType(Record[Idx++]));
// FIXME: C++ InstantiatedFrom
}
void PCHDeclReader::VisitRecordDecl(RecordDecl *RD) {
VisitTagDecl(RD);
RD->setHasFlexibleArrayMember(Record[Idx++]);
RD->setAnonymousStructOrUnion(Record[Idx++]);
}
void PCHDeclReader::VisitValueDecl(ValueDecl *VD) {
VisitNamedDecl(VD);
VD->setType(Reader.GetType(Record[Idx++]));
}
void PCHDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
VisitValueDecl(ECD);
if (Record[Idx++])
ECD->setInitExpr(Reader.ReadDeclExpr());
ECD->setInitVal(Reader.ReadAPSInt(Record, Idx));
}
void PCHDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
VisitValueDecl(FD);
if (Record[Idx++])
FD->setLazyBody(Reader.getDeclsCursor().GetCurrentBitNo());
FD->setPreviousDeclaration(
cast_or_null<FunctionDecl>(Reader.GetDecl(Record[Idx++])));
FD->setStorageClass((FunctionDecl::StorageClass)Record[Idx++]);
FD->setInline(Record[Idx++]);
FD->setC99InlineDefinition(Record[Idx++]);
FD->setVirtualAsWritten(Record[Idx++]);
FD->setPure(Record[Idx++]);
FD->setHasInheritedPrototype(Record[Idx++]);
FD->setHasWrittenPrototype(Record[Idx++]);
FD->setDeleted(Record[Idx++]);
FD->setTypeSpecStartLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
// FIXME: C++ TemplateOrInstantiation
unsigned NumParams = Record[Idx++];
llvm::SmallVector<ParmVarDecl *, 16> Params;
Params.reserve(NumParams);
for (unsigned I = 0; I != NumParams; ++I)
Params.push_back(cast<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
FD->setParams(*Reader.getContext(), Params.data(), NumParams);
}
void PCHDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
VisitNamedDecl(MD);
if (Record[Idx++]) {
// In practice, this won't be executed (since method definitions
// don't occur in header files).
MD->setBody(Reader.ReadDeclStmt());
MD->setSelfDecl(cast<ImplicitParamDecl>(Reader.GetDecl(Record[Idx++])));
MD->setCmdDecl(cast<ImplicitParamDecl>(Reader.GetDecl(Record[Idx++])));
}
MD->setInstanceMethod(Record[Idx++]);
MD->setVariadic(Record[Idx++]);
MD->setSynthesized(Record[Idx++]);
MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record[Idx++]);
MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
MD->setResultType(Reader.GetType(Record[Idx++]));
MD->setEndLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
unsigned NumParams = Record[Idx++];
llvm::SmallVector<ParmVarDecl *, 16> Params;
Params.reserve(NumParams);
for (unsigned I = 0; I != NumParams; ++I)
Params.push_back(cast<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
MD->setMethodParams(*Reader.getContext(), Params.data(), NumParams);
}
void PCHDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
VisitNamedDecl(CD);
CD->setAtEndLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
}
void PCHDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
VisitObjCContainerDecl(ID);
ID->setTypeForDecl(Reader.GetType(Record[Idx++]).getTypePtr());
ID->setSuperClass(cast_or_null<ObjCInterfaceDecl>
(Reader.GetDecl(Record[Idx++])));
unsigned NumProtocols = Record[Idx++];
llvm::SmallVector<ObjCProtocolDecl *, 16> Protocols;
Protocols.reserve(NumProtocols);
for (unsigned I = 0; I != NumProtocols; ++I)
Protocols.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
ID->setProtocolList(Protocols.data(), NumProtocols, *Reader.getContext());
unsigned NumIvars = Record[Idx++];
llvm::SmallVector<ObjCIvarDecl *, 16> IVars;
IVars.reserve(NumIvars);
for (unsigned I = 0; I != NumIvars; ++I)
IVars.push_back(cast<ObjCIvarDecl>(Reader.GetDecl(Record[Idx++])));
ID->setIVarList(IVars.data(), NumIvars, *Reader.getContext());
ID->setCategoryList(
cast_or_null<ObjCCategoryDecl>(Reader.GetDecl(Record[Idx++])));
ID->setForwardDecl(Record[Idx++]);
ID->setImplicitInterfaceDecl(Record[Idx++]);
ID->setClassLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
ID->setSuperClassLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
ID->setAtEndLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
}
void PCHDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
VisitFieldDecl(IVD);
IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record[Idx++]);
}
void PCHDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
VisitObjCContainerDecl(PD);
PD->setForwardDecl(Record[Idx++]);
PD->setLocEnd(SourceLocation::getFromRawEncoding(Record[Idx++]));
unsigned NumProtoRefs = Record[Idx++];
llvm::SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
ProtoRefs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoRefs.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, *Reader.getContext());
}
void PCHDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
VisitFieldDecl(FD);
}
void PCHDeclReader::VisitObjCClassDecl(ObjCClassDecl *CD) {
VisitDecl(CD);
unsigned NumClassRefs = Record[Idx++];
llvm::SmallVector<ObjCInterfaceDecl *, 16> ClassRefs;
ClassRefs.reserve(NumClassRefs);
for (unsigned I = 0; I != NumClassRefs; ++I)
ClassRefs.push_back(cast<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
CD->setClassList(*Reader.getContext(), ClassRefs.data(), NumClassRefs);
}
void PCHDeclReader::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *FPD) {
VisitDecl(FPD);
unsigned NumProtoRefs = Record[Idx++];
llvm::SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
ProtoRefs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoRefs.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
FPD->setProtocolList(ProtoRefs.data(), NumProtoRefs, *Reader.getContext());
}
void PCHDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
VisitObjCContainerDecl(CD);
CD->setClassInterface(cast<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
unsigned NumProtoRefs = Record[Idx++];
llvm::SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
ProtoRefs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoRefs.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, *Reader.getContext());
CD->setNextClassCategory(cast_or_null<ObjCCategoryDecl>(Reader.GetDecl(Record[Idx++])));
CD->setLocEnd(SourceLocation::getFromRawEncoding(Record[Idx++]));
}
void PCHDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
VisitNamedDecl(CAD);
CAD->setClassInterface(cast<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
VisitNamedDecl(D);
D->setType(Reader.GetType(Record[Idx++]));
// FIXME: stable encoding
D->setPropertyAttributes(
(ObjCPropertyDecl::PropertyAttributeKind)Record[Idx++]);
// FIXME: stable encoding
D->setPropertyImplementation(
(ObjCPropertyDecl::PropertyControl)Record[Idx++]);
D->setGetterName(Reader.ReadDeclarationName(Record, Idx).getObjCSelector());
D->setSetterName(Reader.ReadDeclarationName(Record, Idx).getObjCSelector());
D->setGetterMethodDecl(
cast_or_null<ObjCMethodDecl>(Reader.GetDecl(Record[Idx++])));
D->setSetterMethodDecl(
cast_or_null<ObjCMethodDecl>(Reader.GetDecl(Record[Idx++])));
D->setPropertyIvarDecl(
cast_or_null<ObjCIvarDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
VisitNamedDecl(D);
D->setClassInterface(
cast_or_null<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
D->setLocEnd(SourceLocation::getFromRawEncoding(Record[Idx++]));
}
void PCHDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
VisitObjCImplDecl(D);
D->setIdentifier(Reader.GetIdentifierInfo(Record, Idx));
}
void PCHDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
VisitObjCImplDecl(D);
D->setSuperClass(
cast_or_null<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
VisitDecl(D);
D->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
D->setPropertyDecl(
cast_or_null<ObjCPropertyDecl>(Reader.GetDecl(Record[Idx++])));
D->setPropertyIvarDecl(
cast_or_null<ObjCIvarDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitFieldDecl(FieldDecl *FD) {
VisitValueDecl(FD);
FD->setMutable(Record[Idx++]);
if (Record[Idx++])
FD->setBitWidth(Reader.ReadDeclExpr());
}
void PCHDeclReader::VisitVarDecl(VarDecl *VD) {
VisitValueDecl(VD);
VD->setStorageClass((VarDecl::StorageClass)Record[Idx++]);
VD->setThreadSpecified(Record[Idx++]);
VD->setCXXDirectInitializer(Record[Idx++]);
VD->setDeclaredInCondition(Record[Idx++]);
VD->setPreviousDeclaration(
cast_or_null<VarDecl>(Reader.GetDecl(Record[Idx++])));
VD->setTypeSpecStartLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
if (Record[Idx++])
VD->setInit(*Reader.getContext(), Reader.ReadDeclExpr());
}
void PCHDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
VisitVarDecl(PD);
}
void PCHDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
VisitVarDecl(PD);
PD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
// FIXME: default argument (C++ only)
}
void PCHDeclReader::VisitOriginalParmVarDecl(OriginalParmVarDecl *PD) {
VisitParmVarDecl(PD);
PD->setOriginalType(Reader.GetType(Record[Idx++]));
}
void PCHDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
VisitDecl(AD);
AD->setAsmString(cast<StringLiteral>(Reader.ReadDeclExpr()));
}
void PCHDeclReader::VisitBlockDecl(BlockDecl *BD) {
VisitDecl(BD);
BD->setBody(cast_or_null<CompoundStmt>(Reader.ReadDeclStmt()));
unsigned NumParams = Record[Idx++];
llvm::SmallVector<ParmVarDecl *, 16> Params;
Params.reserve(NumParams);
for (unsigned I = 0; I != NumParams; ++I)
Params.push_back(cast<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
BD->setParams(*Reader.getContext(), Params.data(), NumParams);
}
std::pair<uint64_t, uint64_t>
PCHDeclReader::VisitDeclContext(DeclContext *DC) {
uint64_t LexicalOffset = Record[Idx++];
uint64_t VisibleOffset = Record[Idx++];
return std::make_pair(LexicalOffset, VisibleOffset);
}
//===----------------------------------------------------------------------===//
// Attribute Reading
//===----------------------------------------------------------------------===//
/// \brief Reads attributes from the current stream position.
Attr *PCHReader::ReadAttributes() {
unsigned Code = DeclsCursor.ReadCode();
assert(Code == llvm::bitc::UNABBREV_RECORD &&
"Expected unabbreviated record"); (void)Code;
RecordData Record;
unsigned Idx = 0;
unsigned RecCode = DeclsCursor.ReadRecord(Code, Record);
assert(RecCode == pch::DECL_ATTR && "Expected attribute record");
(void)RecCode;
#define SIMPLE_ATTR(Name) \
case Attr::Name: \
New = ::new (*Context) Name##Attr(); \
break
#define STRING_ATTR(Name) \
case Attr::Name: \
New = ::new (*Context) Name##Attr(ReadString(Record, Idx)); \
break
#define UNSIGNED_ATTR(Name) \
case Attr::Name: \
New = ::new (*Context) Name##Attr(Record[Idx++]); \
break
Attr *Attrs = 0;
while (Idx < Record.size()) {
Attr *New = 0;
Attr::Kind Kind = (Attr::Kind)Record[Idx++];
bool IsInherited = Record[Idx++];
switch (Kind) {
STRING_ATTR(Alias);
UNSIGNED_ATTR(Aligned);
SIMPLE_ATTR(AlwaysInline);
SIMPLE_ATTR(AnalyzerNoReturn);
STRING_ATTR(Annotate);
STRING_ATTR(AsmLabel);
case Attr::Blocks:
New = ::new (*Context) BlocksAttr(
(BlocksAttr::BlocksAttrTypes)Record[Idx++]);
break;
case Attr::Cleanup:
New = ::new (*Context) CleanupAttr(
cast<FunctionDecl>(GetDecl(Record[Idx++])));
break;
SIMPLE_ATTR(Const);
UNSIGNED_ATTR(Constructor);
SIMPLE_ATTR(DLLExport);
SIMPLE_ATTR(DLLImport);
SIMPLE_ATTR(Deprecated);
UNSIGNED_ATTR(Destructor);
SIMPLE_ATTR(FastCall);
case Attr::Format: {
std::string Type = ReadString(Record, Idx);
unsigned FormatIdx = Record[Idx++];
unsigned FirstArg = Record[Idx++];
New = ::new (*Context) FormatAttr(Type, FormatIdx, FirstArg);
break;
}
case Attr::FormatArg: {
unsigned FormatIdx = Record[Idx++];
New = ::new (*Context) FormatArgAttr(FormatIdx);
break;
}
case Attr::Sentinel: {
int sentinel = Record[Idx++];
int nullPos = Record[Idx++];
New = ::new (*Context) SentinelAttr(sentinel, nullPos);
break;
}
SIMPLE_ATTR(GNUInline);
case Attr::IBOutletKind:
New = ::new (*Context) IBOutletAttr();
break;
SIMPLE_ATTR(NoReturn);
SIMPLE_ATTR(NoThrow);
SIMPLE_ATTR(Nodebug);
SIMPLE_ATTR(Noinline);
case Attr::NonNull: {
unsigned Size = Record[Idx++];
llvm::SmallVector<unsigned, 16> ArgNums;
ArgNums.insert(ArgNums.end(), &Record[Idx], &Record[Idx] + Size);
Idx += Size;
New = ::new (*Context) NonNullAttr(ArgNums.data(), Size);
break;
}
SIMPLE_ATTR(ObjCException);
SIMPLE_ATTR(ObjCNSObject);
SIMPLE_ATTR(CFReturnsRetained);
SIMPLE_ATTR(NSReturnsRetained);
SIMPLE_ATTR(Overloadable);
UNSIGNED_ATTR(Packed);
SIMPLE_ATTR(Pure);
UNSIGNED_ATTR(Regparm);
STRING_ATTR(Section);
SIMPLE_ATTR(StdCall);
SIMPLE_ATTR(TransparentUnion);
SIMPLE_ATTR(Unavailable);
SIMPLE_ATTR(Unused);
SIMPLE_ATTR(Used);
case Attr::Visibility:
New = ::new (*Context) VisibilityAttr(
(VisibilityAttr::VisibilityTypes)Record[Idx++]);
break;
SIMPLE_ATTR(WarnUnusedResult);
SIMPLE_ATTR(Weak);
SIMPLE_ATTR(WeakImport);
}
assert(New && "Unable to decode attribute?");
New->setInherited(IsInherited);
New->setNext(Attrs);
Attrs = New;
}
#undef UNSIGNED_ATTR
#undef STRING_ATTR
#undef SIMPLE_ATTR
// The list of attributes was built backwards. Reverse the list
// before returning it.
Attr *PrevAttr = 0, *NextAttr = 0;
while (Attrs) {
NextAttr = Attrs->getNext();
Attrs->setNext(PrevAttr);
PrevAttr = Attrs;
Attrs = NextAttr;
}
return PrevAttr;
}
//===----------------------------------------------------------------------===//
// PCHReader Implementation
//===----------------------------------------------------------------------===//
/// \brief Note that we have loaded the declaration with the given
/// Index.
///
/// This routine notes that this declaration has already been loaded,
/// so that future GetDecl calls will return this declaration rather
/// than trying to load a new declaration.
inline void PCHReader::LoadedDecl(unsigned Index, Decl *D) {
assert(!DeclsLoaded[Index] && "Decl loaded twice?");
DeclsLoaded[Index] = D;
}
/// \brief Determine whether the consumer will be interested in seeing
/// this declaration (via HandleTopLevelDecl).
///
/// This routine should return true for anything that might affect
/// code generation, e.g., inline function definitions, Objective-C
/// declarations with metadata, etc.
static bool isConsumerInterestedIn(Decl *D) {
if (VarDecl *Var = dyn_cast<VarDecl>(D))
return Var->isFileVarDecl() && Var->getInit();
if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
return Func->isThisDeclarationADefinition();
return isa<ObjCProtocolDecl>(D);
}
/// \brief Read the declaration at the given offset from the PCH file.
Decl *PCHReader::ReadDeclRecord(uint64_t Offset, unsigned Index) {
// Keep track of where we are in the stream, then jump back there
// after reading this declaration.
SavedStreamPosition SavedPosition(DeclsCursor);
DeclsCursor.JumpToBit(Offset);
RecordData Record;
unsigned Code = DeclsCursor.ReadCode();
unsigned Idx = 0;
PCHDeclReader Reader(*this, Record, Idx);
Decl *D = 0;
switch ((pch::DeclCode)DeclsCursor.ReadRecord(Code, Record)) {
case pch::DECL_ATTR:
case pch::DECL_CONTEXT_LEXICAL:
case pch::DECL_CONTEXT_VISIBLE:
assert(false && "Record cannot be de-serialized with ReadDeclRecord");
break;
case pch::DECL_TRANSLATION_UNIT:
assert(Index == 0 && "Translation unit must be at index 0");
D = Context->getTranslationUnitDecl();
break;
case pch::DECL_TYPEDEF:
D = TypedefDecl::Create(*Context, 0, SourceLocation(), 0, QualType());
break;
case pch::DECL_ENUM:
D = EnumDecl::Create(*Context, 0, SourceLocation(), 0, 0);
break;
case pch::DECL_RECORD:
D = RecordDecl::Create(*Context, TagDecl::TK_struct, 0, SourceLocation(),
0, 0);
break;
case pch::DECL_ENUM_CONSTANT:
D = EnumConstantDecl::Create(*Context, 0, SourceLocation(), 0, QualType(),
0, llvm::APSInt());
break;
case pch::DECL_FUNCTION:
D = FunctionDecl::Create(*Context, 0, SourceLocation(), DeclarationName(),
QualType());
break;
case pch::DECL_OBJC_METHOD:
D = ObjCMethodDecl::Create(*Context, SourceLocation(), SourceLocation(),
Selector(), QualType(), 0);
break;
case pch::DECL_OBJC_INTERFACE:
D = ObjCInterfaceDecl::Create(*Context, 0, SourceLocation(), 0);
break;
case pch::DECL_OBJC_IVAR:
D = ObjCIvarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(),
ObjCIvarDecl::None);
break;
case pch::DECL_OBJC_PROTOCOL:
D = ObjCProtocolDecl::Create(*Context, 0, SourceLocation(), 0);
break;
case pch::DECL_OBJC_AT_DEFS_FIELD:
D = ObjCAtDefsFieldDecl::Create(*Context, 0, SourceLocation(), 0,
QualType(), 0);
break;
case pch::DECL_OBJC_CLASS:
D = ObjCClassDecl::Create(*Context, 0, SourceLocation());
break;
case pch::DECL_OBJC_FORWARD_PROTOCOL:
D = ObjCForwardProtocolDecl::Create(*Context, 0, SourceLocation());
break;
case pch::DECL_OBJC_CATEGORY:
D = ObjCCategoryDecl::Create(*Context, 0, SourceLocation(), 0);
break;
case pch::DECL_OBJC_CATEGORY_IMPL:
D = ObjCCategoryImplDecl::Create(*Context, 0, SourceLocation(), 0, 0);
break;
case pch::DECL_OBJC_IMPLEMENTATION:
D = ObjCImplementationDecl::Create(*Context, 0, SourceLocation(), 0, 0);
break;
case pch::DECL_OBJC_COMPATIBLE_ALIAS:
D = ObjCCompatibleAliasDecl::Create(*Context, 0, SourceLocation(), 0, 0);
break;
case pch::DECL_OBJC_PROPERTY:
D = ObjCPropertyDecl::Create(*Context, 0, SourceLocation(), 0, QualType());
break;
case pch::DECL_OBJC_PROPERTY_IMPL:
D = ObjCPropertyImplDecl::Create(*Context, 0, SourceLocation(),
SourceLocation(), 0,
ObjCPropertyImplDecl::Dynamic, 0);
break;
case pch::DECL_FIELD:
D = FieldDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0,
false);
break;
case pch::DECL_VAR:
D = VarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(),
VarDecl::None, SourceLocation());
break;
case pch::DECL_IMPLICIT_PARAM:
D = ImplicitParamDecl::Create(*Context, 0, SourceLocation(), 0, QualType());
break;
case pch::DECL_PARM_VAR:
D = ParmVarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(),
VarDecl::None, 0);
break;
case pch::DECL_ORIGINAL_PARM_VAR:
D = OriginalParmVarDecl::Create(*Context, 0, SourceLocation(), 0,
QualType(), QualType(), VarDecl::None, 0);
break;
case pch::DECL_FILE_SCOPE_ASM:
D = FileScopeAsmDecl::Create(*Context, 0, SourceLocation(), 0);
break;
case pch::DECL_BLOCK:
D = BlockDecl::Create(*Context, 0, SourceLocation());
break;
}
assert(D && "Unknown declaration reading PCH file");
LoadedDecl(Index, D);
Reader.Visit(D);
// If this declaration is also a declaration context, get the
// offsets for its tables of lexical and visible declarations.
if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
if (Offsets.first || Offsets.second) {
DC->setHasExternalLexicalStorage(Offsets.first != 0);
DC->setHasExternalVisibleStorage(Offsets.second != 0);
DeclContextOffsets[DC] = Offsets;
}
}
assert(Idx == Record.size());
// If we have deserialized a declaration that has a definition the
// AST consumer might need to know about, notify the consumer
// about that definition now or queue it for later.
if (isConsumerInterestedIn(D)) {
if (Consumer) {
DeclGroupRef DG(D);
Consumer->HandleTopLevelDecl(DG);
} else {
InterestingDecls.push_back(D);
}
}
return D;
}
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