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ab6a088314
teak-llvm/clang/lib/Frontend/PCHWriterDecl.cpp
Sebastian Redl ab6a088314 - Make ObjCInterfaceDecl redeclarable, and create separate decl nodes for forward declarations and the definition. 
- Eagerly create ObjCInterfaceTypes for declarations.
- The two above changes lead to a 0.5% increase in memory use and no speed regression when parsing Cocoa.h. On the other hand, now chained PCH works when there's a forward declaration in one PCH and the interface definition in another.
- Add HandleInterestingDecl to ASTConsumer. PCHReader passes the "interesting" decls it finds to this function instead of HandleTopLevelDecl. The default implementation forwards to HandleTopLevelDecl, but ASTUnit's handler for example ignores them. This fixes a potential crash when lazy loading of PCH data would cause ASTUnit's "top level" declaration collection to change while being iterated.

llvm-svn: 110610
2010-08-09 21:55:28 +00:00

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//===--- PCHWriterDecl.cpp - Declaration Serialization --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements serialization for Declarations.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/PCHWriter.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Support/ErrorHandling.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Declaration serialization
//===----------------------------------------------------------------------===//
namespace clang {
class PCHDeclWriter : public DeclVisitor<PCHDeclWriter, void> {
PCHWriter &Writer;
ASTContext &Context;
PCHWriter::RecordData &Record;
public:
pch::DeclCode Code;
unsigned AbbrevToUse;
PCHDeclWriter(PCHWriter &Writer, ASTContext &Context,
PCHWriter::RecordData &Record)
: Writer(Writer), Context(Context), Record(Record) {
}
void Visit(Decl *D);
void VisitDecl(Decl *D);
void VisitTranslationUnitDecl(TranslationUnitDecl *D);
void VisitNamedDecl(NamedDecl *D);
void VisitNamespaceDecl(NamespaceDecl *D);
void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
void VisitTypeDecl(TypeDecl *D);
void VisitTypedefDecl(TypedefDecl *D);
void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
void VisitTagDecl(TagDecl *D);
void VisitEnumDecl(EnumDecl *D);
void VisitRecordDecl(RecordDecl *D);
void VisitCXXRecordDecl(CXXRecordDecl *D);
void VisitClassTemplateSpecializationDecl(
ClassTemplateSpecializationDecl *D);
void VisitClassTemplatePartialSpecializationDecl(
ClassTemplatePartialSpecializationDecl *D);
void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
void VisitValueDecl(ValueDecl *D);
void VisitEnumConstantDecl(EnumConstantDecl *D);
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
void VisitDeclaratorDecl(DeclaratorDecl *D);
void VisitFunctionDecl(FunctionDecl *D);
void VisitCXXMethodDecl(CXXMethodDecl *D);
void VisitCXXConstructorDecl(CXXConstructorDecl *D);
void VisitCXXDestructorDecl(CXXDestructorDecl *D);
void VisitCXXConversionDecl(CXXConversionDecl *D);
void VisitFieldDecl(FieldDecl *D);
void VisitVarDecl(VarDecl *D);
void VisitImplicitParamDecl(ImplicitParamDecl *D);
void VisitParmVarDecl(ParmVarDecl *D);
void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
void VisitTemplateDecl(TemplateDecl *D);
void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
void VisitClassTemplateDecl(ClassTemplateDecl *D);
void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
void VisitUsingDecl(UsingDecl *D);
void VisitUsingShadowDecl(UsingShadowDecl *D);
void VisitLinkageSpecDecl(LinkageSpecDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
void VisitAccessSpecDecl(AccessSpecDecl *D);
void VisitFriendDecl(FriendDecl *D);
void VisitFriendTemplateDecl(FriendTemplateDecl *D);
void VisitStaticAssertDecl(StaticAssertDecl *D);
void VisitBlockDecl(BlockDecl *D);
void VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
uint64_t VisibleOffset);
template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
// FIXME: Put in the same order is DeclNodes.td?
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 PCHDeclWriter::Visit(Decl *D) {
DeclVisitor<PCHDeclWriter>::Visit(D);
// Handle FunctionDecl's body here and write it after all other Stmts/Exprs
// have been written. We want it last because we will not read it back when
// retrieving it from the PCH, we'll just lazily set the offset.
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
Record.push_back(FD->isThisDeclarationADefinition());
if (FD->isThisDeclarationADefinition())
Writer.AddStmt(FD->getBody());
}
}
void PCHDeclWriter::VisitDecl(Decl *D) {
Writer.AddDeclRef(cast_or_null<Decl>(D->getDeclContext()), Record);
Writer.AddDeclRef(cast_or_null<Decl>(D->getLexicalDeclContext()), Record);
Writer.AddSourceLocation(D->getLocation(), Record);
Record.push_back(D->isInvalidDecl());
Record.push_back(D->hasAttrs());
Record.push_back(D->isImplicit());
Record.push_back(D->isUsed(false));
Record.push_back(D->getAccess());
Record.push_back(D->getPCHLevel());
}
void PCHDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
VisitDecl(D);
Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
Code = pch::DECL_TRANSLATION_UNIT;
}
void PCHDeclWriter::VisitNamedDecl(NamedDecl *D) {
VisitDecl(D);
Writer.AddDeclarationName(D->getDeclName(), Record);
}
void PCHDeclWriter::VisitTypeDecl(TypeDecl *D) {
VisitNamedDecl(D);
Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
}
void PCHDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
VisitTypeDecl(D);
Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
Code = pch::DECL_TYPEDEF;
}
void PCHDeclWriter::VisitTagDecl(TagDecl *D) {
VisitTypeDecl(D);
Record.push_back(D->getIdentifierNamespace());
VisitRedeclarable(D);
Record.push_back((unsigned)D->getTagKind()); // FIXME: stable encoding
Record.push_back(D->isDefinition());
Record.push_back(D->isEmbeddedInDeclarator());
Writer.AddSourceLocation(D->getRBraceLoc(), Record);
Writer.AddSourceLocation(D->getTagKeywordLoc(), Record);
// FIXME: maybe write optional qualifier and its range.
Writer.AddDeclRef(D->getTypedefForAnonDecl(), Record);
}
void PCHDeclWriter::VisitEnumDecl(EnumDecl *D) {
VisitTagDecl(D);
Writer.AddTypeRef(D->getIntegerType(), Record);
Writer.AddTypeRef(D->getPromotionType(), Record);
Record.push_back(D->getNumPositiveBits());
Record.push_back(D->getNumNegativeBits());
Writer.AddDeclRef(D->getInstantiatedFromMemberEnum(), Record);
Code = pch::DECL_ENUM;
}
void PCHDeclWriter::VisitRecordDecl(RecordDecl *D) {
VisitTagDecl(D);
Record.push_back(D->hasFlexibleArrayMember());
Record.push_back(D->isAnonymousStructOrUnion());
Record.push_back(D->hasObjectMember());
Code = pch::DECL_RECORD;
}
void PCHDeclWriter::VisitValueDecl(ValueDecl *D) {
VisitNamedDecl(D);
Writer.AddTypeRef(D->getType(), Record);
}
void PCHDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
VisitValueDecl(D);
Record.push_back(D->getInitExpr()? 1 : 0);
if (D->getInitExpr())
Writer.AddStmt(D->getInitExpr());
Writer.AddAPSInt(D->getInitVal(), Record);
Code = pch::DECL_ENUM_CONSTANT;
}
void PCHDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
VisitValueDecl(D);
Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
// FIXME: write optional qualifier and its range.
}
void PCHDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
VisitDeclaratorDecl(D);
Record.push_back(D->getIdentifierNamespace());
Record.push_back(D->getTemplatedKind());
switch (D->getTemplatedKind()) {
default: assert(false && "Unhandled TemplatedKind!");
break;
case FunctionDecl::TK_NonTemplate:
break;
case FunctionDecl::TK_FunctionTemplate:
Writer.AddDeclRef(D->getDescribedFunctionTemplate(), Record);
break;
case FunctionDecl::TK_MemberSpecialization: {
MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
Writer.AddDeclRef(MemberInfo->getInstantiatedFrom(), Record);
Record.push_back(MemberInfo->getTemplateSpecializationKind());
Writer.AddSourceLocation(MemberInfo->getPointOfInstantiation(), Record);
break;
}
case FunctionDecl::TK_FunctionTemplateSpecialization: {
FunctionTemplateSpecializationInfo *
FTSInfo = D->getTemplateSpecializationInfo();
// We want it canonical to guarantee that it has a Common*.
Writer.AddDeclRef(FTSInfo->getTemplate()->getCanonicalDecl(), Record);
Record.push_back(FTSInfo->getTemplateSpecializationKind());
// Template arguments.
Writer.AddTemplateArgumentList(FTSInfo->TemplateArguments, Record);
// Template args as written.
Record.push_back(FTSInfo->TemplateArgumentsAsWritten != 0);
if (FTSInfo->TemplateArgumentsAsWritten) {
Record.push_back(FTSInfo->TemplateArgumentsAsWritten->size());
for (int i=0, e = FTSInfo->TemplateArgumentsAsWritten->size(); i!=e; ++i)
Writer.AddTemplateArgumentLoc((*FTSInfo->TemplateArgumentsAsWritten)[i],
Record);
Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->getLAngleLoc(),
Record);
Writer.AddSourceLocation(FTSInfo->TemplateArgumentsAsWritten->getRAngleLoc(),
Record);
}
Writer.AddSourceLocation(FTSInfo->getPointOfInstantiation(), Record);
break;
}
case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
DependentFunctionTemplateSpecializationInfo *
DFTSInfo = D->getDependentSpecializationInfo();
// Templates.
Record.push_back(DFTSInfo->getNumTemplates());
for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
Writer.AddDeclRef(DFTSInfo->getTemplate(i), Record);
// Templates args.
Record.push_back(DFTSInfo->getNumTemplateArgs());
for (int i=0, e = DFTSInfo->getNumTemplateArgs(); i != e; ++i)
Writer.AddTemplateArgumentLoc(DFTSInfo->getTemplateArg(i), Record);
Writer.AddSourceLocation(DFTSInfo->getLAngleLoc(), Record);
Writer.AddSourceLocation(DFTSInfo->getRAngleLoc(), Record);
break;
}
}
// FunctionDecl's body is handled last at PCHWriterDecl::Visit,
// after everything else is written.
VisitRedeclarable(D);
Record.push_back(D->getStorageClass()); // FIXME: stable encoding
Record.push_back(D->getStorageClassAsWritten());
Record.push_back(D->isInlineSpecified());
Record.push_back(D->isVirtualAsWritten());
Record.push_back(D->isPure());
Record.push_back(D->hasInheritedPrototype());
Record.push_back(D->hasWrittenPrototype());
Record.push_back(D->isDeleted());
Record.push_back(D->isTrivial());
Record.push_back(D->isCopyAssignment());
Record.push_back(D->hasImplicitReturnZero());
Writer.AddSourceLocation(D->getLocEnd(), Record);
Record.push_back(D->param_size());
for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
P != PEnd; ++P)
Writer.AddDeclRef(*P, Record);
Code = pch::DECL_FUNCTION;
}
void PCHDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
VisitNamedDecl(D);
// FIXME: convert to LazyStmtPtr?
// Unlike C/C++, method bodies will never be in header files.
bool HasBodyStuff = D->getBody() != 0 ||
D->getSelfDecl() != 0 || D->getCmdDecl() != 0;
Record.push_back(HasBodyStuff);
if (HasBodyStuff) {
Writer.AddStmt(D->getBody());
Writer.AddDeclRef(D->getSelfDecl(), Record);
Writer.AddDeclRef(D->getCmdDecl(), Record);
}
Record.push_back(D->isInstanceMethod());
Record.push_back(D->isVariadic());
Record.push_back(D->isSynthesized());
Record.push_back(D->isDefined());
// FIXME: stable encoding for @required/@optional
Record.push_back(D->getImplementationControl());
// FIXME: stable encoding for in/out/inout/bycopy/byref/oneway
Record.push_back(D->getObjCDeclQualifier());
Record.push_back(D->getNumSelectorArgs());
Writer.AddTypeRef(D->getResultType(), Record);
Writer.AddTypeSourceInfo(D->getResultTypeSourceInfo(), Record);
Writer.AddSourceLocation(D->getLocEnd(), Record);
Record.push_back(D->param_size());
for (ObjCMethodDecl::param_iterator P = D->param_begin(),
PEnd = D->param_end(); P != PEnd; ++P)
Writer.AddDeclRef(*P, Record);
Code = pch::DECL_OBJC_METHOD;
}
void PCHDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceRange(D->getAtEndRange(), Record);
// Abstract class (no need to define a stable pch::DECL code).
}
void PCHDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
VisitObjCContainerDecl(D);
Record.push_back(D->isForwardDecl());
Record.push_back(D->isImplicitInterfaceDecl());
VisitRedeclarable(D);
Writer.AddTypeRef(QualType(D->getTypeForDecl(), 0), Record);
Writer.AddDeclRef(D->getSuperClass(), Record);
Record.push_back(D->protocol_size());
for (ObjCInterfaceDecl::protocol_iterator P = D->protocol_begin(),
PEnd = D->protocol_end();
P != PEnd; ++P)
Writer.AddDeclRef(*P, Record);
for (ObjCInterfaceDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
PLEnd = D->protocol_loc_end();
PL != PLEnd; ++PL)
Writer.AddSourceLocation(*PL, Record);
Record.push_back(D->ivar_size());
for (ObjCInterfaceDecl::ivar_iterator I = D->ivar_begin(),
IEnd = D->ivar_end(); I != IEnd; ++I)
Writer.AddDeclRef(*I, Record);
Writer.AddDeclRef(D->getCategoryList(), Record);
Writer.AddSourceLocation(D->getClassLoc(), Record);
Writer.AddSourceLocation(D->getSuperClassLoc(), Record);
Writer.AddSourceLocation(D->getLocEnd(), Record);
Code = pch::DECL_OBJC_INTERFACE;
}
void PCHDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
VisitFieldDecl(D);
// FIXME: stable encoding for @public/@private/@protected/@package
Record.push_back(D->getAccessControl());
Record.push_back(D->getSynthesize());
Code = pch::DECL_OBJC_IVAR;
}
void PCHDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
VisitObjCContainerDecl(D);
Record.push_back(D->isForwardDecl());
Writer.AddSourceLocation(D->getLocEnd(), Record);
Record.push_back(D->protocol_size());
for (ObjCProtocolDecl::protocol_iterator
I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
Writer.AddDeclRef(*I, Record);
for (ObjCProtocolDecl::protocol_loc_iterator PL = D->protocol_loc_begin(),
PLEnd = D->protocol_loc_end();
PL != PLEnd; ++PL)
Writer.AddSourceLocation(*PL, Record);
Code = pch::DECL_OBJC_PROTOCOL;
}
void PCHDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
VisitFieldDecl(D);
Code = pch::DECL_OBJC_AT_DEFS_FIELD;
}
void PCHDeclWriter::VisitObjCClassDecl(ObjCClassDecl *D) {
VisitDecl(D);
Record.push_back(D->size());
for (ObjCClassDecl::iterator I = D->begin(), IEnd = D->end(); I != IEnd; ++I)
Writer.AddDeclRef(I->getInterface(), Record);
for (ObjCClassDecl::iterator I = D->begin(), IEnd = D->end(); I != IEnd; ++I)
Writer.AddSourceLocation(I->getLocation(), Record);
Code = pch::DECL_OBJC_CLASS;
}
void PCHDeclWriter::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
VisitDecl(D);
Record.push_back(D->protocol_size());
for (ObjCForwardProtocolDecl::protocol_iterator
I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
Writer.AddDeclRef(*I, Record);
for (ObjCForwardProtocolDecl::protocol_loc_iterator
PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
PL != PLEnd; ++PL)
Writer.AddSourceLocation(*PL, Record);
Code = pch::DECL_OBJC_FORWARD_PROTOCOL;
}
void PCHDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
VisitObjCContainerDecl(D);
Writer.AddDeclRef(D->getClassInterface(), Record);
Record.push_back(D->protocol_size());
for (ObjCCategoryDecl::protocol_iterator
I = D->protocol_begin(), IEnd = D->protocol_end(); I != IEnd; ++I)
Writer.AddDeclRef(*I, Record);
for (ObjCCategoryDecl::protocol_loc_iterator
PL = D->protocol_loc_begin(), PLEnd = D->protocol_loc_end();
PL != PLEnd; ++PL)
Writer.AddSourceLocation(*PL, Record);
Writer.AddDeclRef(D->getNextClassCategory(), Record);
Writer.AddSourceLocation(D->getAtLoc(), Record);
Writer.AddSourceLocation(D->getCategoryNameLoc(), Record);
Code = pch::DECL_OBJC_CATEGORY;
}
void PCHDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
VisitNamedDecl(D);
Writer.AddDeclRef(D->getClassInterface(), Record);
Code = pch::DECL_OBJC_COMPATIBLE_ALIAS;
}
void PCHDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceLocation(D->getAtLoc(), Record);
Writer.AddTypeSourceInfo(D->getTypeSourceInfo(), Record);
// FIXME: stable encoding
Record.push_back((unsigned)D->getPropertyAttributes());
Record.push_back((unsigned)D->getPropertyAttributesAsWritten());
// FIXME: stable encoding
Record.push_back((unsigned)D->getPropertyImplementation());
Writer.AddDeclarationName(D->getGetterName(), Record);
Writer.AddDeclarationName(D->getSetterName(), Record);
Writer.AddDeclRef(D->getGetterMethodDecl(), Record);
Writer.AddDeclRef(D->getSetterMethodDecl(), Record);
Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
Code = pch::DECL_OBJC_PROPERTY;
}
void PCHDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
VisitObjCContainerDecl(D);
Writer.AddDeclRef(D->getClassInterface(), Record);
// Abstract class (no need to define a stable pch::DECL code).
}
void PCHDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
VisitObjCImplDecl(D);
Writer.AddIdentifierRef(D->getIdentifier(), Record);
Code = pch::DECL_OBJC_CATEGORY_IMPL;
}
void PCHDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
VisitObjCImplDecl(D);
Writer.AddDeclRef(D->getSuperClass(), Record);
Writer.AddCXXBaseOrMemberInitializers(D->IvarInitializers,
D->NumIvarInitializers, Record);
Code = pch::DECL_OBJC_IMPLEMENTATION;
}
void PCHDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
VisitDecl(D);
Writer.AddSourceLocation(D->getLocStart(), Record);
Writer.AddDeclRef(D->getPropertyDecl(), Record);
Writer.AddDeclRef(D->getPropertyIvarDecl(), Record);
Writer.AddStmt(D->getGetterCXXConstructor());
Writer.AddStmt(D->getSetterCXXAssignment());
Code = pch::DECL_OBJC_PROPERTY_IMPL;
}
void PCHDeclWriter::VisitFieldDecl(FieldDecl *D) {
VisitDeclaratorDecl(D);
Record.push_back(D->isMutable());
Record.push_back(D->getBitWidth()? 1 : 0);
if (D->getBitWidth())
Writer.AddStmt(D->getBitWidth());
if (!D->getDeclName())
Writer.AddDeclRef(Context.getInstantiatedFromUnnamedFieldDecl(D), Record);
Code = pch::DECL_FIELD;
}
void PCHDeclWriter::VisitVarDecl(VarDecl *D) {
VisitDeclaratorDecl(D);
Record.push_back(D->getStorageClass()); // FIXME: stable encoding
Record.push_back(D->getStorageClassAsWritten());
Record.push_back(D->isThreadSpecified());
Record.push_back(D->hasCXXDirectInitializer());
Record.push_back(D->isExceptionVariable());
Record.push_back(D->isNRVOVariable());
VisitRedeclarable(D);
Record.push_back(D->getInit() ? 1 : 0);
if (D->getInit())
Writer.AddStmt(D->getInit());
MemberSpecializationInfo *SpecInfo
= D->isStaticDataMember() ? D->getMemberSpecializationInfo() : 0;
Record.push_back(SpecInfo != 0);
if (SpecInfo) {
Writer.AddDeclRef(SpecInfo->getInstantiatedFrom(), Record);
Record.push_back(SpecInfo->getTemplateSpecializationKind());
Writer.AddSourceLocation(SpecInfo->getPointOfInstantiation(), Record);
}
Code = pch::DECL_VAR;
}
void PCHDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
VisitVarDecl(D);
Code = pch::DECL_IMPLICIT_PARAM;
}
void PCHDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
VisitVarDecl(D);
Record.push_back(D->getObjCDeclQualifier()); // FIXME: stable encoding
Record.push_back(D->hasInheritedDefaultArg());
Record.push_back(D->hasUninstantiatedDefaultArg());
if (D->hasUninstantiatedDefaultArg())
Writer.AddStmt(D->getUninstantiatedDefaultArg());
Code = pch::DECL_PARM_VAR;
// If the assumptions about the DECL_PARM_VAR abbrev are true, use it. Here
// we dynamically check for the properties that we optimize for, but don't
// know are true of all PARM_VAR_DECLs.
if (!D->getTypeSourceInfo() &&
!D->hasAttrs() &&
!D->isImplicit() &&
!D->isUsed(false) &&
D->getAccess() == AS_none &&
D->getPCHLevel() == 0 &&
D->getStorageClass() == 0 &&
!D->hasCXXDirectInitializer() && // Can params have this ever?
D->getObjCDeclQualifier() == 0 &&
!D->hasInheritedDefaultArg() &&
D->getInit() == 0 &&
!D->hasUninstantiatedDefaultArg()) // No default expr.
AbbrevToUse = Writer.getParmVarDeclAbbrev();
// Check things we know are true of *every* PARM_VAR_DECL, which is more than
// just us assuming it.
assert(!D->isInvalidDecl() && "Shouldn't emit invalid decls");
assert(!D->isThreadSpecified() && "PARM_VAR_DECL can't be __thread");
assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
assert(D->getPreviousDeclaration() == 0 && "PARM_VAR_DECL can't be redecl");
assert(!D->isStaticDataMember() &&
"PARM_VAR_DECL can't be static data member");
}
void PCHDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
VisitDecl(D);
Writer.AddStmt(D->getAsmString());
Code = pch::DECL_FILE_SCOPE_ASM;
}
void PCHDeclWriter::VisitBlockDecl(BlockDecl *D) {
VisitDecl(D);
Writer.AddStmt(D->getBody());
Writer.AddTypeSourceInfo(D->getSignatureAsWritten(), Record);
Record.push_back(D->param_size());
for (FunctionDecl::param_iterator P = D->param_begin(), PEnd = D->param_end();
P != PEnd; ++P)
Writer.AddDeclRef(*P, Record);
Code = pch::DECL_BLOCK;
}
void PCHDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
VisitDecl(D);
// FIXME: It might be nice to serialize the brace locations for this
// declaration, which don't seem to be readily available in the AST.
Record.push_back(D->getLanguage());
Record.push_back(D->hasBraces());
Code = pch::DECL_LINKAGE_SPEC;
}
void PCHDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceLocation(D->getLBracLoc(), Record);
Writer.AddSourceLocation(D->getRBracLoc(), Record);
Writer.AddDeclRef(D->getNextNamespace(), Record);
// Only write one reference--original or anonymous
Record.push_back(D->isOriginalNamespace());
if (D->isOriginalNamespace())
Writer.AddDeclRef(D->getAnonymousNamespace(), Record);
else
Writer.AddDeclRef(D->getOriginalNamespace(), Record);
Code = pch::DECL_NAMESPACE;
if (Writer.hasChain() && !D->isOriginalNamespace() &&
D->getOriginalNamespace()->getPCHLevel() > 0) {
Writer.AddUpdatedNamespace(D->getOriginalNamespace());
}
}
void PCHDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceLocation(D->getAliasLoc(), Record);
Writer.AddSourceRange(D->getQualifierRange(), Record);
Writer.AddNestedNameSpecifier(D->getQualifier(), Record);
Writer.AddSourceLocation(D->getTargetNameLoc(), Record);
Writer.AddDeclRef(D->getNamespace(), Record);
Code = pch::DECL_NAMESPACE_ALIAS;
}
void PCHDeclWriter::VisitUsingDecl(UsingDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceRange(D->getNestedNameRange(), Record);
Writer.AddSourceLocation(D->getUsingLocation(), Record);
Writer.AddNestedNameSpecifier(D->getTargetNestedNameDecl(), Record);
Record.push_back(D->getNumShadowDecls());
for (UsingDecl::shadow_iterator P = D->shadow_begin(),
PEnd = D->shadow_end(); P != PEnd; ++P)
Writer.AddDeclRef(*P, Record);
Record.push_back(D->isTypeName());
Writer.AddDeclRef(Context.getInstantiatedFromUsingDecl(D), Record);
Code = pch::DECL_USING;
}
void PCHDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
VisitNamedDecl(D);
Writer.AddDeclRef(D->getTargetDecl(), Record);
Writer.AddDeclRef(D->getUsingDecl(), Record);
Writer.AddDeclRef(Context.getInstantiatedFromUsingShadowDecl(D), Record);
Code = pch::DECL_USING_SHADOW;
}
void PCHDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
VisitNamedDecl(D);
Writer.AddSourceLocation(D->getNamespaceKeyLocation(), Record);
Writer.AddSourceRange(D->getQualifierRange(), Record);
Writer.AddNestedNameSpecifier(D->getQualifier(), Record);
Writer.AddSourceLocation(D->getIdentLocation(), Record);
Writer.AddDeclRef(D->getNominatedNamespace(), Record);
Writer.AddDeclRef(dyn_cast<Decl>(D->getCommonAncestor()), Record);
Code = pch::DECL_USING_DIRECTIVE;
}
void PCHDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
VisitValueDecl(D);
Writer.AddSourceRange(D->getTargetNestedNameRange(), Record);
Writer.AddSourceLocation(D->getUsingLoc(), Record);
Writer.AddNestedNameSpecifier(D->getTargetNestedNameSpecifier(), Record);
Code = pch::DECL_UNRESOLVED_USING_VALUE;
}
void PCHDeclWriter::VisitUnresolvedUsingTypenameDecl(
UnresolvedUsingTypenameDecl *D) {
VisitTypeDecl(D);
Writer.AddSourceRange(D->getTargetNestedNameRange(), Record);
Writer.AddSourceLocation(D->getUsingLoc(), Record);
Writer.AddSourceLocation(D->getTypenameLoc(), Record);
Writer.AddNestedNameSpecifier(D->getTargetNestedNameSpecifier(), Record);
Code = pch::DECL_UNRESOLVED_USING_TYPENAME;
}
void PCHDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
// See comments at PCHDeclReader::VisitCXXRecordDecl about why this happens
// before VisitRecordDecl.
enum { Data_NoDefData, Data_Owner, Data_NotOwner };
bool OwnsDefinitionData = false;
if (D->DefinitionData) {
assert(D->DefinitionData->Definition &&
"DefinitionData don't point to a definition decl!");
OwnsDefinitionData = D->DefinitionData->Definition == D;
if (OwnsDefinitionData) {
Record.push_back(Data_Owner);
} else {
Record.push_back(Data_NotOwner);
Writer.AddDeclRef(D->DefinitionData->Definition, Record);
}
} else
Record.push_back(Data_NoDefData);
VisitRecordDecl(D);
if (OwnsDefinitionData) {
assert(D->DefinitionData);
struct CXXRecordDecl::DefinitionData &Data = *D->DefinitionData;
Record.push_back(Data.UserDeclaredConstructor);
Record.push_back(Data.UserDeclaredCopyConstructor);
Record.push_back(Data.UserDeclaredCopyAssignment);
Record.push_back(Data.UserDeclaredDestructor);
Record.push_back(Data.Aggregate);
Record.push_back(Data.PlainOldData);
Record.push_back(Data.Empty);
Record.push_back(Data.Polymorphic);
Record.push_back(Data.Abstract);
Record.push_back(Data.HasTrivialConstructor);
Record.push_back(Data.HasTrivialCopyConstructor);
Record.push_back(Data.HasTrivialCopyAssignment);
Record.push_back(Data.HasTrivialDestructor);
Record.push_back(Data.ComputedVisibleConversions);
Record.push_back(Data.DeclaredDefaultConstructor);
Record.push_back(Data.DeclaredCopyConstructor);
Record.push_back(Data.DeclaredCopyAssignment);
Record.push_back(Data.DeclaredDestructor);
Record.push_back(D->getNumBases());
for (CXXRecordDecl::base_class_iterator I = D->bases_begin(),
E = D->bases_end(); I != E; ++I)
Writer.AddCXXBaseSpecifier(*I, Record);
// FIXME: Make VBases lazily computed when needed to avoid storing them.
Record.push_back(D->getNumVBases());
for (CXXRecordDecl::base_class_iterator I = D->vbases_begin(),
E = D->vbases_end(); I != E; ++I)
Writer.AddCXXBaseSpecifier(*I, Record);
Writer.AddUnresolvedSet(Data.Conversions, Record);
Writer.AddUnresolvedSet(Data.VisibleConversions, Record);
// Data.Definition is written at the top.
Writer.AddDeclRef(Data.FirstFriend, Record);
}
enum {
CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
};
if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
Record.push_back(CXXRecTemplate);
Writer.AddDeclRef(TemplD, Record);
} else if (MemberSpecializationInfo *MSInfo
= D->getMemberSpecializationInfo()) {
Record.push_back(CXXRecMemberSpecialization);
Writer.AddDeclRef(MSInfo->getInstantiatedFrom(), Record);
Record.push_back(MSInfo->getTemplateSpecializationKind());
Writer.AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
} else {
Record.push_back(CXXRecNotTemplate);
}
Code = pch::DECL_CXX_RECORD;
}
void PCHDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
VisitFunctionDecl(D);
Record.push_back(D->size_overridden_methods());
for (CXXMethodDecl::method_iterator
I = D->begin_overridden_methods(), E = D->end_overridden_methods();
I != E; ++I)
Writer.AddDeclRef(*I, Record);
Code = pch::DECL_CXX_METHOD;
}
void PCHDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
VisitCXXMethodDecl(D);
Record.push_back(D->IsExplicitSpecified);
Record.push_back(D->ImplicitlyDefined);
Writer.AddCXXBaseOrMemberInitializers(D->BaseOrMemberInitializers,
D->NumBaseOrMemberInitializers, Record);
Code = pch::DECL_CXX_CONSTRUCTOR;
}
void PCHDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
VisitCXXMethodDecl(D);
Record.push_back(D->ImplicitlyDefined);
Writer.AddDeclRef(D->OperatorDelete, Record);
Code = pch::DECL_CXX_DESTRUCTOR;
}
void PCHDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
VisitCXXMethodDecl(D);
Record.push_back(D->IsExplicitSpecified);
Code = pch::DECL_CXX_CONVERSION;
}
void PCHDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
VisitDecl(D);
Writer.AddSourceLocation(D->getColonLoc(), Record);
Code = pch::DECL_ACCESS_SPEC;
}
void PCHDeclWriter::VisitFriendDecl(FriendDecl *D) {
VisitDecl(D);
Record.push_back(D->Friend.is<TypeSourceInfo*>());
if (D->Friend.is<TypeSourceInfo*>())
Writer.AddTypeSourceInfo(D->Friend.get<TypeSourceInfo*>(), Record);
else
Writer.AddDeclRef(D->Friend.get<NamedDecl*>(), Record);
Writer.AddDeclRef(D->NextFriend, Record);
Writer.AddSourceLocation(D->FriendLoc, Record);
Code = pch::DECL_FRIEND;
}
void PCHDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
VisitDecl(D);
Record.push_back(D->getNumTemplateParameters());
for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
Writer.AddTemplateParameterList(D->getTemplateParameterList(i), Record);
Record.push_back(D->getFriendDecl() != 0);
if (D->getFriendDecl())
Writer.AddDeclRef(D->getFriendDecl(), Record);
else
Writer.AddTypeSourceInfo(D->getFriendType(), Record);
Writer.AddSourceLocation(D->getFriendLoc(), Record);
Code = pch::DECL_FRIEND_TEMPLATE;
}
void PCHDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
VisitNamedDecl(D);
Writer.AddDeclRef(D->getTemplatedDecl(), Record);
Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
}
void PCHDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
VisitTemplateDecl(D);
Record.push_back(D->getIdentifierNamespace());
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
if (D->getPreviousDeclaration() == 0) {
// This TemplateDecl owns the CommonPtr; write it.
assert(D->isCanonicalDecl());
Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
if (D->getInstantiatedFromMemberTemplate())
Record.push_back(D->isMemberSpecialization());
Writer.AddDeclRef(D->getCommonPtr()->Latest, Record);
} else {
RedeclarableTemplateDecl *First = D->getFirstDeclaration();
assert(First != D);
// If this is a most recent redeclaration that is pointed to by a first decl
// in a chained PCH, keep track of the association with the map so we can
// update the first decl during PCH reading.
if (First->getMostRecentDeclaration() == D &&
First->getPCHLevel() > D->getPCHLevel()) {
assert(Writer.FirstLatestDecls.find(First)==Writer.FirstLatestDecls.end()
&& "The latest is already set");
Writer.FirstLatestDecls[First] = D;
}
}
}
void PCHDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
VisitRedeclarableTemplateDecl(D);
if (D->getPreviousDeclaration() == 0) {
typedef llvm::FoldingSet<ClassTemplateSpecializationDecl> CTSDSetTy;
CTSDSetTy &CTSDSet = D->getSpecializations();
Record.push_back(CTSDSet.size());
for (CTSDSetTy::iterator I=CTSDSet.begin(), E = CTSDSet.end(); I!=E; ++I) {
assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
Writer.AddDeclRef(&*I, Record);
}
typedef llvm::FoldingSet<ClassTemplatePartialSpecializationDecl> CTPSDSetTy;
CTPSDSetTy &CTPSDSet = D->getPartialSpecializations();
Record.push_back(CTPSDSet.size());
for (CTPSDSetTy::iterator I=CTPSDSet.begin(), E=CTPSDSet.end(); I!=E; ++I) {
assert(I->isCanonicalDecl() && "Expected only canonical decls in set");
Writer.AddDeclRef(&*I, Record);
}
// InjectedClassNameType is computed, no need to write it.
}
Code = pch::DECL_CLASS_TEMPLATE;
}
void PCHDeclWriter::VisitClassTemplateSpecializationDecl(
ClassTemplateSpecializationDecl *D) {
VisitCXXRecordDecl(D);
llvm::PointerUnion<ClassTemplateDecl *,
ClassTemplatePartialSpecializationDecl *> InstFrom
= D->getSpecializedTemplateOrPartial();
if (InstFrom.is<ClassTemplateDecl *>()) {
Writer.AddDeclRef(InstFrom.get<ClassTemplateDecl *>(), Record);
} else {
Writer.AddDeclRef(InstFrom.get<ClassTemplatePartialSpecializationDecl *>(),
Record);
Writer.AddTemplateArgumentList(&D->getTemplateInstantiationArgs(), Record);
}
// Explicit info.
Writer.AddTypeSourceInfo(D->getTypeAsWritten(), Record);
if (D->getTypeAsWritten()) {
Writer.AddSourceLocation(D->getExternLoc(), Record);
Writer.AddSourceLocation(D->getTemplateKeywordLoc(), Record);
}
Writer.AddTemplateArgumentList(&D->getTemplateArgs(), Record);
Writer.AddSourceLocation(D->getPointOfInstantiation(), Record);
Record.push_back(D->getSpecializationKind());
if (D->isCanonicalDecl()) {
// When reading, we'll add it to the folding set of the following template.
Writer.AddDeclRef(D->getSpecializedTemplate()->getCanonicalDecl(), Record);
}
Code = pch::DECL_CLASS_TEMPLATE_SPECIALIZATION;
}
void PCHDeclWriter::VisitClassTemplatePartialSpecializationDecl(
ClassTemplatePartialSpecializationDecl *D) {
VisitClassTemplateSpecializationDecl(D);
Writer.AddTemplateParameterList(D->getTemplateParameters(), Record);
Record.push_back(D->getNumTemplateArgsAsWritten());
for (int i = 0, e = D->getNumTemplateArgsAsWritten(); i != e; ++i)
Writer.AddTemplateArgumentLoc(D->getTemplateArgsAsWritten()[i], Record);
Record.push_back(D->getSequenceNumber());
// These are read/set from/to the first declaration.
if (D->getPreviousDeclaration() == 0) {
Writer.AddDeclRef(D->getInstantiatedFromMember(), Record);
Record.push_back(D->isMemberSpecialization());
}
Code = pch::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
}
void PCHDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
VisitRedeclarableTemplateDecl(D);
if (D->getPreviousDeclaration() == 0) {
// This FunctionTemplateDecl owns the CommonPtr; write it.
// Write the function specialization declarations.
Record.push_back(D->getSpecializations().size());
for (llvm::FoldingSet<FunctionTemplateSpecializationInfo>::iterator
I = D->getSpecializations().begin(),
E = D->getSpecializations().end() ; I != E; ++I) {
assert(I->Function->isCanonicalDecl() &&
"Expected only canonical decls in set");
Writer.AddDeclRef(I->Function, Record);
}
}
Code = pch::DECL_FUNCTION_TEMPLATE;
}
void PCHDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
VisitTypeDecl(D);
Record.push_back(D->wasDeclaredWithTypename());
Record.push_back(D->isParameterPack());
Record.push_back(D->defaultArgumentWasInherited());
Writer.AddTypeSourceInfo(D->getDefaultArgumentInfo(), Record);
Code = pch::DECL_TEMPLATE_TYPE_PARM;
}
void PCHDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
VisitVarDecl(D);
// TemplateParmPosition.
Record.push_back(D->getDepth());
Record.push_back(D->getPosition());
// Rest of NonTypeTemplateParmDecl.
Record.push_back(D->getDefaultArgument() != 0);
if (D->getDefaultArgument()) {
Writer.AddStmt(D->getDefaultArgument());
Record.push_back(D->defaultArgumentWasInherited());
}
Code = pch::DECL_NON_TYPE_TEMPLATE_PARM;
}
void PCHDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
VisitTemplateDecl(D);
// TemplateParmPosition.
Record.push_back(D->getDepth());
Record.push_back(D->getPosition());
// Rest of TemplateTemplateParmDecl.
Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
Record.push_back(D->defaultArgumentWasInherited());
Code = pch::DECL_TEMPLATE_TEMPLATE_PARM;
}
void PCHDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
VisitDecl(D);
Writer.AddStmt(D->getAssertExpr());
Writer.AddStmt(D->getMessage());
Code = pch::DECL_STATIC_ASSERT;
}
/// \brief Emit the DeclContext part of a declaration context decl.
///
/// \param LexicalOffset the offset at which the DECL_CONTEXT_LEXICAL
/// block for this declaration context is stored. May be 0 to indicate
/// that there are no declarations stored within this context.
///
/// \param VisibleOffset the offset at which the DECL_CONTEXT_VISIBLE
/// block for this declaration context is stored. May be 0 to indicate
/// that there are no declarations visible from this context. Note
/// that this value will not be emitted for non-primary declaration
/// contexts.
void PCHDeclWriter::VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
uint64_t VisibleOffset) {
Record.push_back(LexicalOffset);
Record.push_back(VisibleOffset);
}
template <typename T>
void PCHDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
enum { NoRedeclaration = 0, PointsToPrevious, PointsToLatest };
if (D->RedeclLink.getNext() == D) {
Record.push_back(NoRedeclaration);
} else {
Record.push_back(D->RedeclLink.NextIsPrevious() ? PointsToPrevious
: PointsToLatest);
Writer.AddDeclRef(D->RedeclLink.getPointer(), Record);
}
T *First = D->getFirstDeclaration();
T *ThisDecl = static_cast<T*>(D);
// If this is a most recent redeclaration that is pointed to by a first decl
// in a chained PCH, keep track of the association with the map so we can
// update the first decl during PCH reading.
if (ThisDecl != First && First->getMostRecentDeclaration() == ThisDecl &&
First->getPCHLevel() > ThisDecl->getPCHLevel()) {
assert(Writer.FirstLatestDecls.find(First) == Writer.FirstLatestDecls.end()
&& "The latest is already set");
Writer.FirstLatestDecls[First] = ThisDecl;
}
}
//===----------------------------------------------------------------------===//
// PCHWriter Implementation
//===----------------------------------------------------------------------===//
void PCHWriter::WriteDeclsBlockAbbrevs() {
using namespace llvm;
// Abbreviation for DECL_PARM_VAR.
BitCodeAbbrev *Abv = new BitCodeAbbrev();
Abv->Add(BitCodeAbbrevOp(pch::DECL_PARM_VAR));
// Decl
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalDeclContext
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
Abv->Add(BitCodeAbbrevOp(0)); // isInvalidDecl (!?)
Abv->Add(BitCodeAbbrevOp(0)); // HasAttrs
Abv->Add(BitCodeAbbrevOp(0)); // isImplicit
Abv->Add(BitCodeAbbrevOp(0)); // isUsed
Abv->Add(BitCodeAbbrevOp(AS_none)); // C++ AccessSpecifier
Abv->Add(BitCodeAbbrevOp(0)); // PCH level
// NamedDecl
Abv->Add(BitCodeAbbrevOp(0)); // NameKind = Identifier
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
// ValueDecl
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
// DeclaratorDecl
Abv->Add(BitCodeAbbrevOp(pch::PREDEF_TYPE_NULL_ID)); // InfoType
// VarDecl
Abv->Add(BitCodeAbbrevOp(0)); // StorageClass
Abv->Add(BitCodeAbbrevOp(0)); // StorageClassAsWritten
Abv->Add(BitCodeAbbrevOp(0)); // isThreadSpecified
Abv->Add(BitCodeAbbrevOp(0)); // hasCXXDirectInitializer
Abv->Add(BitCodeAbbrevOp(0)); // isExceptionVariable
Abv->Add(BitCodeAbbrevOp(0)); // isNRVOVariable
Abv->Add(BitCodeAbbrevOp(0)); // PrevDecl
Abv->Add(BitCodeAbbrevOp(0)); // HasInit
Abv->Add(BitCodeAbbrevOp(0)); // HasMemberSpecializationInfo
// ParmVarDecl
Abv->Add(BitCodeAbbrevOp(0)); // ObjCDeclQualifier
Abv->Add(BitCodeAbbrevOp(0)); // HasInheritedDefaultArg
Abv->Add(BitCodeAbbrevOp(0)); // HasUninstantiatedDefaultArg
ParmVarDeclAbbrev = Stream.EmitAbbrev(Abv);
Abv = new BitCodeAbbrev();
Abv->Add(BitCodeAbbrevOp(pch::DECL_CONTEXT_LEXICAL));
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abv);
}
/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
/// consumers of the AST.
///
/// Such decls will always be deserialized from the PCH file, so we would like
/// this to be as restrictive as possible. Currently the predicate is driven by
/// code generation requirements, if other clients have a different notion of
/// what is "required" then we may have to consider an alternate scheme where
/// clients can iterate over the top-level decls and get information on them,
/// without necessary deserializing them. We could explicitly require such
/// clients to use a separate API call to "realize" the decl. This should be
/// relatively painless since they would presumably only do it for top-level
/// decls.
static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
// File scoped assembly or obj-c implementation must be seen.
if (isa<FileScopeAsmDecl>(D) || isa<ObjCImplementationDecl>(D))
return true;
return Context.DeclMustBeEmitted(D);
}
void PCHWriter::WriteDecl(ASTContext &Context, Decl *D) {
RecordData Record;
PCHDeclWriter W(*this, Context, Record);
// If this declaration is also a DeclContext, write blocks for the
// declarations that lexically stored inside its context and those
// declarations that are visible from its context. These blocks
// are written before the declaration itself so that we can put
// their offsets into the record for the declaration.
uint64_t LexicalOffset = 0;
uint64_t VisibleOffset = 0;
DeclContext *DC = dyn_cast<DeclContext>(D);
if (DC) {
LexicalOffset = WriteDeclContextLexicalBlock(Context, DC);
VisibleOffset = WriteDeclContextVisibleBlock(Context, DC);
}
// Determine the ID for this declaration
pch::DeclID &ID = DeclIDs[D];
if (ID == 0)
ID = NextDeclID++;
unsigned Index = ID - FirstDeclID;
// Record the offset for this declaration
if (DeclOffsets.size() == Index)
DeclOffsets.push_back(Stream.GetCurrentBitNo());
else if (DeclOffsets.size() < Index) {
DeclOffsets.resize(Index+1);
DeclOffsets[Index] = Stream.GetCurrentBitNo();
}
// Build and emit a record for this declaration
Record.clear();
W.Code = (pch::DeclCode)0;
W.AbbrevToUse = 0;
W.Visit(D);
if (DC) W.VisitDeclContext(DC, LexicalOffset, VisibleOffset);
if (!W.Code)
llvm::report_fatal_error(llvm::StringRef("unexpected declaration kind '") +
D->getDeclKindName() + "'");
Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
// If the declaration had any attributes, write them now.
if (D->hasAttrs())
WriteAttributeRecord(D->getAttrs());
// Flush any expressions that were written as part of this declaration.
FlushStmts();
// Note "external" declarations so that we can add them to a record in the
// PCH file later.
//
// FIXME: This should be renamed, the predicate is much more complicated.
if (isRequiredDecl(D, Context))
ExternalDefinitions.push_back(Index + 1);
}
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