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llvm-project/clang/lib/Frontend/PCHWriterDecl.cpp

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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 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);
// 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());
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
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.
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
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.
Record.push_back(D->getBody() != 0);
if (D->getBody() != 0) {
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());
// 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);
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);
Record.push_back(D->isForwardDecl());
Record.push_back(D->isImplicitInterfaceDecl());
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);
// FIXME add writing of IvarInitializers and NumIvarInitializers.
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);
// FIXME. write GetterCXXConstructor and SetterCXXAssignment.
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->isDeclaredInCondition());
Record.push_back(D->isExceptionVariable());
Record.push_back(D->isNRVOVariable());
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
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->isDeclaredInCondition() && "PARM_VAR_DECL can't be in condition");
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;
}
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);
Record.push_back(D->NumBaseOrMemberInitializers);
for (unsigned i=0; i != D->NumBaseOrMemberInitializers; ++i) {
CXXBaseOrMemberInitializer *Init = D->BaseOrMemberInitializers[i];
Record.push_back(Init->isBaseInitializer());
if (Init->isBaseInitializer()) {
Writer.AddTypeSourceInfo(Init->getBaseClassInfo(), Record);
Record.push_back(Init->isBaseVirtual());
} else {
Writer.AddDeclRef(Init->getMember(), Record);
}
Writer.AddSourceLocation(Init->getMemberLocation(), Record);
Writer.AddStmt(Init->getInit());
Writer.AddDeclRef(Init->getAnonUnionMember(), Record);
Writer.AddSourceLocation(Init->getLParenLoc(), Record);
Writer.AddSourceLocation(Init->getRParenLoc(), Record);
Record.push_back(Init->isWritten());
if (Init->isWritten()) {
Record.push_back(Init->getSourceOrder());
} else {
Record.push_back(Init->getNumArrayIndices());
for (unsigned i=0, e=Init->getNumArrayIndices(); i != e; ++i)
Writer.AddDeclRef(Init->getArrayIndex(i), 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::VisitClassTemplateDecl(ClassTemplateDecl *D) {
VisitTemplateDecl(D);
Record.push_back(D->getIdentifierNamespace());
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
if (D->getPreviousDeclaration() == 0) {
// This ClassTemplateDecl owns the CommonPtr; write it.
assert(D->isCanonicalDecl());
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.
Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
if (D->getInstantiatedFromMemberTemplate())
Record.push_back(D->isMemberSpecialization());
}
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) {
VisitTemplateDecl(D);
Record.push_back(D->getIdentifierNamespace());
Writer.AddDeclRef(D->getPreviousDeclaration(), Record);
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);
}
Writer.AddDeclRef(D->getInstantiatedFromMemberTemplate(), Record);
if (D->getInstantiatedFromMemberTemplate())
Record.push_back(D->isMemberSpecialization());
}
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);
}
//===----------------------------------------------------------------------===//
// 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)); // isDeclaredInCondition
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);
}
/// 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.
//
// FIXME: This predicate is essentially IRgen's predicate to determine whether a
// declaration can be deferred. Merge them somehow.
static bool isRequiredDecl(const Decl *D, ASTContext &Context) {
// File scoped assembly must be seen.
if (isa<FileScopeAsmDecl>(D))
return true;
// Otherwise if this isn't a function or a file scoped variable it doesn't
// need to be seen.
if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
if (!VD->isFileVarDecl())
return false;
} else if (!isa<FunctionDecl>(D))
return false;
// Aliases and used decls must be seen.
if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>())
return true;
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
// Forward declarations don't need to be seen.
if (!FD->isThisDeclarationADefinition())
return false;
// Constructors and destructors must be seen.
if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>())
return true;
// Otherwise, this is required unless it is static.
//
// FIXME: Inlines.
return FD->getStorageClass() != FunctionDecl::Static;
} else {
const VarDecl *VD = cast<VarDecl>(D);
// In C++, this doesn't need to be seen if it is marked "extern".
if (Context.getLangOptions().CPlusPlus && !VD->getInit() &&
(VD->getStorageClass() == VarDecl::Extern ||
VD->isExternC()))
return false;
// In C, this doesn't need to be seen unless it is a definition.
if (!Context.getLangOptions().CPlusPlus && !VD->getInit())
return false;
// Otherwise, this is required unless it is static.
return VD->getStorageClass() != VarDecl::Static;
}
}
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 = DeclIDs.size();
unsigned Index = ID - 1;
// 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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