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llvm-project/clang/lib/Frontend/PCHReaderDecl.cpp
Douglas Gregor 6fd1b1802f Implement semantic analysis and an AST representation for the named 
return value optimization. Sema marks return statements with their
NRVO candidates (which may or may not end up using the NRVO), then, at
the end of a function body, computes and marks those variables that
can be allocated into the return slot.

I've checked this locally with some debugging statements (not
committed), but there won't be any tests until CodeGen comes along.

llvm-svn: 103865
2010-05-15 06:01:05 +00:00

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39 KiB
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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/DeclCXX.h"
#include "clang/AST/DeclTemplate.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 VisitNamespaceDecl(NamespaceDecl *D);
void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
void VisitTypeDecl(TypeDecl *TD);
void VisitTypedefDecl(TypedefDecl *TD);
void VisitUnresolvedUsingTypename(UnresolvedUsingTypenameDecl *D);
void VisitTagDecl(TagDecl *TD);
void VisitEnumDecl(EnumDecl *ED);
void VisitRecordDecl(RecordDecl *RD);
void VisitCXXRecordDecl(CXXRecordDecl *D);
void VisitClassTemplateSpecializationDecl(
ClassTemplateSpecializationDecl *D);
void VisitClassTemplatePartialSpecializationDecl(
ClassTemplatePartialSpecializationDecl *D);
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
void VisitValueDecl(ValueDecl *VD);
void VisitEnumConstantDecl(EnumConstantDecl *ECD);
void VisitUnresolvedUsingValue(UnresolvedUsingValueDecl *D);
void VisitDeclaratorDecl(DeclaratorDecl *DD);
void VisitFunctionDecl(FunctionDecl *FD);
void VisitCXXMethodDecl(CXXMethodDecl *D);
void VisitCXXConstructorDecl(CXXConstructorDecl *D);
void VisitCXXDestructorDecl(CXXDestructorDecl *D);
void VisitCXXConversionDecl(CXXConversionDecl *D);
void VisitFieldDecl(FieldDecl *FD);
void VisitVarDecl(VarDecl *VD);
void VisitImplicitParamDecl(ImplicitParamDecl *PD);
void VisitParmVarDecl(ParmVarDecl *PD);
void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
void VisitTemplateDecl(TemplateDecl *D);
void VisitClassTemplateDecl(ClassTemplateDecl *D);
void visitFunctionTemplateDecl(FunctionTemplateDecl *D);
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
void VisitUsing(UsingDecl *D);
void VisitUsingShadow(UsingShadowDecl *D);
void VisitLinkageSpecDecl(LinkageSpecDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
void VisitFriendTemplateDecl(FriendTemplateDecl *D);
void VisitStaticAssertDecl(StaticAssertDecl *D);
void VisitBlockDecl(BlockDecl *BD);
std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
// FIXME: Reorder according to DeclNodes.def?
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->setUsed(Record[Idx++]);
D->setAccess((AccessSpecifier)Record[Idx++]);
D->setPCHLevel(Record[Idx++] + 1);
}
void PCHDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
VisitDecl(TU);
TU->setAnonymousNamespace(
cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
}
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);
uint64_t TypeData = Record[Idx++];
TD->setTypeSourceInfo(Reader.GetTypeSourceInfo(Record, Idx));
TD->setTypeForDecl(Reader.GetType(TypeData).getTypePtr());
}
void PCHDeclReader::VisitTagDecl(TagDecl *TD) {
VisitTypeDecl(TD);
TD->setPreviousDeclaration(
cast_or_null<TagDecl>(Reader.GetDecl(Record[Idx++])));
TD->setTagKind((TagDecl::TagKind)Record[Idx++]);
TD->setDefinition(Record[Idx++]);
TD->setEmbeddedInDeclarator(Record[Idx++]);
TD->setRBraceLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
TD->setTagKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
// FIXME: maybe read optional qualifier and its range.
TD->setTypedefForAnonDecl(
cast_or_null<TypedefDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitEnumDecl(EnumDecl *ED) {
VisitTagDecl(ED);
ED->setIntegerType(Reader.GetType(Record[Idx++]));
ED->setPromotionType(Reader.GetType(Record[Idx++]));
ED->setNumPositiveBits(Record[Idx++]);
ED->setNumNegativeBits(Record[Idx++]);
// FIXME: C++ InstantiatedFrom
}
void PCHDeclReader::VisitRecordDecl(RecordDecl *RD) {
VisitTagDecl(RD);
RD->setHasFlexibleArrayMember(Record[Idx++]);
RD->setAnonymousStructOrUnion(Record[Idx++]);
RD->setHasObjectMember(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::VisitDeclaratorDecl(DeclaratorDecl *DD) {
VisitValueDecl(DD);
TypeSourceInfo *TInfo = Reader.GetTypeSourceInfo(Record, Idx);
if (TInfo)
DD->setTypeSourceInfo(TInfo);
// FIXME: read optional qualifier and its range.
}
void PCHDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
VisitDeclaratorDecl(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->setStorageClassAsWritten((FunctionDecl::StorageClass)Record[Idx++]);
FD->setInlineSpecified(Record[Idx++]);
FD->setVirtualAsWritten(Record[Idx++]);
FD->setPure(Record[Idx++]);
FD->setHasInheritedPrototype(Record[Idx++]);
FD->setHasWrittenPrototype(Record[Idx++]);
FD->setDeleted(Record[Idx++]);
FD->setTrivial(Record[Idx++]);
FD->setCopyAssignment(Record[Idx++]);
FD->setHasImplicitReturnZero(Record[Idx++]);
FD->setLocEnd(SourceLocation::getFromRawEncoding(Record[Idx++]));
// FIXME: C++ TemplateOrInstantiation
// Read in the parameters.
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(Params.data(), NumParams);
// FIXME: order this properly w.r.t. friendness
// FIXME: this same thing needs to happen for function templates
if (FD->isOverloadedOperator() && !FD->getDeclContext()->isRecord())
FD->setNonMemberOperator();
}
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->setNumSelectorArgs(unsigned(Record[Idx++]));
MD->setResultType(Reader.GetType(Record[Idx++]));
MD->setResultTypeSourceInfo(Reader.GetTypeSourceInfo(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,
NumParams);
}
void PCHDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
VisitNamedDecl(CD);
SourceLocation A = SourceLocation::getFromRawEncoding(Record[Idx++]);
SourceLocation B = SourceLocation::getFromRawEncoding(Record[Idx++]);
CD->setAtEndRange(SourceRange(A, B));
}
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++])));
llvm::SmallVector<SourceLocation, 16> ProtoLocs;
ProtoLocs.reserve(NumProtocols);
for (unsigned I = 0; I != NumProtocols; ++I)
ProtoLocs.push_back(SourceLocation::getFromRawEncoding(Record[Idx++]));
ID->setProtocolList(Protocols.data(), NumProtocols, ProtoLocs.data(),
*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->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->setLocEnd(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++])));
llvm::SmallVector<SourceLocation, 16> ProtoLocs;
ProtoLocs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoLocs.push_back(SourceLocation::getFromRawEncoding(Record[Idx++]));
PD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
*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++])));
llvm::SmallVector<SourceLocation, 16> SLocs;
SLocs.reserve(NumClassRefs);
for (unsigned I = 0; I != NumClassRefs; ++I)
SLocs.push_back(SourceLocation::getFromRawEncoding(Record[Idx++]));
CD->setClassList(*Reader.getContext(), ClassRefs.data(), SLocs.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++])));
llvm::SmallVector<SourceLocation, 16> ProtoLocs;
ProtoLocs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoLocs.push_back(SourceLocation::getFromRawEncoding(Record[Idx++]));
FPD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
*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++])));
llvm::SmallVector<SourceLocation, 16> ProtoLocs;
ProtoLocs.reserve(NumProtoRefs);
for (unsigned I = 0; I != NumProtoRefs; ++I)
ProtoLocs.push_back(SourceLocation::getFromRawEncoding(Record[Idx++]));
CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
*Reader.getContext());
CD->setNextClassCategory(cast_or_null<ObjCCategoryDecl>(Reader.GetDecl(Record[Idx++])));
CD->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
CD->setCategoryNameLoc(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->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
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) {
VisitObjCContainerDecl(D);
D->setClassInterface(
cast_or_null<ObjCInterfaceDecl>(Reader.GetDecl(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++])));
// FIXME. Add reading of IvarInitializers and NumIvarInitializers.
}
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++])));
// FIXME. read GetterCXXConstructor and SetterCXXAssignment
}
void PCHDeclReader::VisitFieldDecl(FieldDecl *FD) {
VisitDeclaratorDecl(FD);
FD->setMutable(Record[Idx++]);
if (Record[Idx++])
FD->setBitWidth(Reader.ReadDeclExpr());
}
void PCHDeclReader::VisitVarDecl(VarDecl *VD) {
VisitDeclaratorDecl(VD);
VD->setStorageClass((VarDecl::StorageClass)Record[Idx++]);
VD->setStorageClassAsWritten((VarDecl::StorageClass)Record[Idx++]);
VD->setThreadSpecified(Record[Idx++]);
VD->setCXXDirectInitializer(Record[Idx++]);
VD->setDeclaredInCondition(Record[Idx++]);
VD->setExceptionVariable(Record[Idx++]);
VD->setNRVOVariable(Record[Idx++]);
VD->setPreviousDeclaration(
cast_or_null<VarDecl>(Reader.GetDecl(Record[Idx++])));
if (Record[Idx++])
VD->setInit(Reader.ReadDeclExpr());
}
void PCHDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
VisitVarDecl(PD);
}
void PCHDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
VisitVarDecl(PD);
PD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record[Idx++]);
PD->setHasInheritedDefaultArg(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(Params.data(), NumParams);
}
void PCHDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
VisitDecl(D);
D->setLanguage((LinkageSpecDecl::LanguageIDs)Record[Idx++]);
D->setHasBraces(Record[Idx++]);
}
void PCHDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
VisitNamedDecl(D);
D->setLBracLoc(Reader.ReadSourceLocation(Record, Idx));
D->setRBracLoc(Reader.ReadSourceLocation(Record, Idx));
D->setNextNamespace(
cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
// Only read one reference--the original or anonymous namespace.
bool IsOriginal = Record[Idx++];
if (IsOriginal)
D->setAnonymousNamespace(
cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
else
D->setOriginalNamespace(
cast_or_null<NamespaceDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
VisitNamedDecl(D);
D->setAliasLoc(Reader.ReadSourceLocation(Record, Idx));
D->setQualifierRange(Reader.ReadSourceRange(Record, Idx));
D->setQualifier(Reader.ReadNestedNameSpecifier(Record, Idx));
D->setTargetNameLoc(Reader.ReadSourceLocation(Record, Idx));
D->setAliasedNamespace(cast<NamedDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitUsing(UsingDecl *D) {
VisitNamedDecl(D);
D->setUsingLocation(Reader.ReadSourceLocation(Record, Idx));
D->setNestedNameRange(Reader.ReadSourceRange(Record, Idx));
D->setTargetNestedNameDecl(Reader.ReadNestedNameSpecifier(Record, Idx));
// FIXME: It would probably be more efficient to read these into a vector
// and then re-cosntruct the shadow decl set over that vector since it
// would avoid existence checks.
unsigned NumShadows = Record[Idx++];
for(unsigned I = 0; I != NumShadows; ++I) {
D->addShadowDecl(cast<UsingShadowDecl>(Reader.GetDecl(Record[Idx++])));
}
D->setTypeName(Record[Idx++]);
}
void PCHDeclReader::VisitUsingShadow(UsingShadowDecl *D) {
VisitNamedDecl(D);
D->setTargetDecl(cast<NamedDecl>(Reader.GetDecl(Record[Idx++])));
D->setUsingDecl(cast<UsingDecl>(Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
VisitNamedDecl(D);
D->setNamespaceKeyLocation(Reader.ReadSourceLocation(Record, Idx));
D->setQualifierRange(Reader.ReadSourceRange(Record, Idx));
D->setQualifier(Reader.ReadNestedNameSpecifier(Record, Idx));
D->setIdentLocation(Reader.ReadSourceLocation(Record, Idx));
D->setNominatedNamespace(cast<NamedDecl>(Reader.GetDecl(Record[Idx++])));
D->setCommonAncestor(cast_or_null<DeclContext>(
Reader.GetDecl(Record[Idx++])));
}
void PCHDeclReader::VisitUnresolvedUsingValue(UnresolvedUsingValueDecl *D) {
VisitValueDecl(D);
D->setTargetNestedNameRange(Reader.ReadSourceRange(Record, Idx));
D->setUsingLoc(Reader.ReadSourceLocation(Record, Idx));
D->setTargetNestedNameSpecifier(Reader.ReadNestedNameSpecifier(Record, Idx));
}
void PCHDeclReader::VisitUnresolvedUsingTypename(
UnresolvedUsingTypenameDecl *D) {
VisitTypeDecl(D);
D->setTargetNestedNameRange(Reader.ReadSourceRange(Record, Idx));
D->setUsingLoc(Reader.ReadSourceLocation(Record, Idx));
D->setTypenameLoc(Reader.ReadSourceLocation(Record, Idx));
D->setTargetNestedNameSpecifier(Reader.ReadNestedNameSpecifier(Record, Idx));
}
void PCHDeclReader::VisitCXXRecordDecl(CXXRecordDecl *D) {
// assert(false && "cannot read CXXRecordDecl");
VisitRecordDecl(D);
}
void PCHDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
// assert(false && "cannot read CXXMethodDecl");
VisitFunctionDecl(D);
}
void PCHDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
// assert(false && "cannot read CXXConstructorDecl");
VisitCXXMethodDecl(D);
}
void PCHDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
// assert(false && "cannot read CXXDestructorDecl");
VisitCXXMethodDecl(D);
}
void PCHDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
// assert(false && "cannot read CXXConversionDecl");
VisitCXXMethodDecl(D);
}
void PCHDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
assert(false && "cannot read FriendTemplateDecl");
}
void PCHDeclReader::VisitTemplateDecl(TemplateDecl *D) {
assert(false && "cannot read TemplateDecl");
}
void PCHDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
assert(false && "cannot read ClassTemplateDecl");
}
void PCHDeclReader::VisitClassTemplateSpecializationDecl(
ClassTemplateSpecializationDecl *D) {
assert(false && "cannot read ClassTemplateSpecializationDecl");
}
void PCHDeclReader::VisitClassTemplatePartialSpecializationDecl(
ClassTemplatePartialSpecializationDecl *D) {
assert(false && "cannot read ClassTemplatePartialSpecializationDecl");
}
void PCHDeclReader::visitFunctionTemplateDecl(FunctionTemplateDecl *D) {
assert(false && "cannot read FunctionTemplateDecl");
}
void PCHDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
assert(false && "cannot read TemplateTypeParmDecl");
}
void PCHDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
assert(false && "cannot read NonTypeTemplateParmDecl");
}
void PCHDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
assert(false && "cannot read TemplateTemplateParmDecl");
}
void PCHDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
assert(false && "cannot read StaticAssertDecl");
}
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(*Context, 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) {
default:
assert(0 && "Unknown attribute!");
break;
STRING_ATTR(Alias);
UNSIGNED_ATTR(Aligned);
SIMPLE_ATTR(AlwaysInline);
SIMPLE_ATTR(AnalyzerNoReturn);
STRING_ATTR(Annotate);
STRING_ATTR(AsmLabel);
SIMPLE_ATTR(BaseCheck);
case Attr::Blocks:
New = ::new (*Context) BlocksAttr(
(BlocksAttr::BlocksAttrTypes)Record[Idx++]);
break;
SIMPLE_ATTR(CDecl);
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);
SIMPLE_ATTR(Final);
case Attr::Format: {
std::string Type = ReadString(Record, Idx);
unsigned FormatIdx = Record[Idx++];
unsigned FirstArg = Record[Idx++];
New = ::new (*Context) FormatAttr(*Context, 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);
SIMPLE_ATTR(Hiding);
case Attr::IBActionKind:
New = ::new (*Context) IBActionAttr();
break;
case Attr::IBOutletKind:
New = ::new (*Context) IBOutletAttr();
break;
SIMPLE_ATTR(Malloc);
SIMPLE_ATTR(NoDebug);
SIMPLE_ATTR(NoInline);
SIMPLE_ATTR(NoReturn);
SIMPLE_ATTR(NoThrow);
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(*Context, ArgNums.data(), Size);
break;
}
case Attr::ReqdWorkGroupSize: {
unsigned X = Record[Idx++];
unsigned Y = Record[Idx++];
unsigned Z = Record[Idx++];
New = ::new (*Context) ReqdWorkGroupSizeAttr(X, Y, Z);
break;
}
SIMPLE_ATTR(ObjCException);
SIMPLE_ATTR(ObjCNSObject);
SIMPLE_ATTR(CFReturnsNotRetained);
SIMPLE_ATTR(CFReturnsRetained);
SIMPLE_ATTR(NSReturnsNotRetained);
SIMPLE_ATTR(NSReturnsRetained);
SIMPLE_ATTR(Overloadable);
SIMPLE_ATTR(Override);
SIMPLE_ATTR(Packed);
UNSIGNED_ATTR(PragmaPack);
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(WeakRef);
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 (isa<FileScopeAsmDecl>(D))
return true;
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);
// Note that we are loading a declaration record.
LoadingTypeOrDecl Loading(*this);
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, 0);
break;
case pch::DECL_ENUM:
D = EnumDecl::Create(*Context, 0, SourceLocation(), 0, SourceLocation(), 0);
break;
case pch::DECL_RECORD:
D = RecordDecl::Create(*Context, TTK_Struct, 0, SourceLocation(),
0, SourceLocation(), 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(), 0);
break;
case pch::DECL_LINKAGE_SPEC:
D = LinkageSpecDecl::Create(*Context, 0, SourceLocation(),
(LinkageSpecDecl::LanguageIDs)0,
false);
break;
case pch::DECL_NAMESPACE:
D = NamespaceDecl::Create(*Context, 0, SourceLocation(), 0);
break;
case pch::DECL_NAMESPACE_ALIAS:
D = NamespaceAliasDecl::Create(*Context, 0, SourceLocation(),
SourceLocation(), 0, SourceRange(), 0,
SourceLocation(), 0);
break;
case pch::DECL_USING:
D = UsingDecl::Create(*Context, 0, SourceLocation(), SourceRange(),
SourceLocation(), 0, DeclarationName(), false);
break;
case pch::DECL_USING_SHADOW:
D = UsingShadowDecl::Create(*Context, 0, SourceLocation(), 0, 0);
break;
case pch::DECL_USING_DIRECTIVE:
D = UsingDirectiveDecl::Create(*Context, 0, SourceLocation(),
SourceLocation(), SourceRange(), 0,
SourceLocation(), 0, 0);
break;
case pch::DECL_UNRESOLVED_USING_VALUE:
D = UnresolvedUsingValueDecl::Create(*Context, 0, SourceLocation(),
SourceRange(), 0, SourceLocation(),
DeclarationName());
break;
case pch::DECL_UNRESOLVED_USING_TYPENAME:
D = UnresolvedUsingTypenameDecl::Create(*Context, 0, SourceLocation(),
SourceLocation(), SourceRange(),
0, SourceLocation(),
DeclarationName());
break;
case pch::DECL_CXX_RECORD:
D = CXXRecordDecl::Create(*Context, TTK_Struct, 0,
SourceLocation(), 0, SourceLocation(), 0);
break;
case pch::DECL_CXX_METHOD:
D = CXXMethodDecl::Create(*Context, 0, SourceLocation(), DeclarationName(),
QualType(), 0);
break;
case pch::DECL_CXX_CONSTRUCTOR:
D = CXXConstructorDecl::Create(*Context, Decl::EmptyShell());
break;
case pch::DECL_CXX_DESTRUCTOR:
D = CXXDestructorDecl::Create(*Context, Decl::EmptyShell());
break;
case pch::DECL_CXX_CONVERSION:
D = CXXConversionDecl::Create(*Context, Decl::EmptyShell());
break;
case pch::DECL_FRIEND:
assert(false && "cannot read FriendDecl");
break;
case pch::DECL_FRIEND_TEMPLATE:
assert(false && "cannot read FriendTemplateDecl");
break;
case pch::DECL_TEMPLATE:
// FIXME: Should TemplateDecl be ABSTRACT_DECL???
assert(false && "TemplateDecl should be abstract!");
break;
case pch::DECL_CLASS_TEMPLATE:
assert(false && "cannot read ClassTemplateDecl");
break;
case pch::DECL_CLASS_TEMPLATE_SPECIALIZATION:
assert(false && "cannot read ClasstemplateSpecializationDecl");
break;
case pch::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
assert(false && "cannot read ClassTemplatePartialSpecializationDecl");
break;
case pch::DECL_FUNCTION_TEMPLATE:
assert(false && "cannot read FunctionTemplateDecl");
break;
case pch::DECL_TEMPLATE_TYPE_PARM:
assert(false && "cannot read TemplateTypeParmDecl");
break;
case pch::DECL_NON_TYPE_TEMPLATE_PARM:
assert(false && "cannot read NonTypeTemplateParmDecl");
break;
case pch::DECL_TEMPLATE_TEMPLATE_PARM:
assert(false && "cannot read TemplateTemplateParmDecl");
break;
case pch::DECL_STATIC_ASSERT:
assert(false && "cannot read StaticAssertDecl");
break;
case pch::DECL_OBJC_METHOD:
D = ObjCMethodDecl::Create(*Context, SourceLocation(), SourceLocation(),
Selector(), QualType(), 0, 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(), 0,
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(),
SourceLocation(), 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, SourceLocation(),
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, 0,
false);
break;
case pch::DECL_VAR:
D = VarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0,
VarDecl::None, VarDecl::None);
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(), 0,
VarDecl::None, 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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