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Diffstat (limited to 'contrib/llvm/tools/clang/lib/Frontend/PCHWriterDecl.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Frontend/PCHWriterDecl.cpp | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Frontend/PCHWriterDecl.cpp b/contrib/llvm/tools/clang/lib/Frontend/PCHWriterDecl.cpp new file mode 100644 index 0000000..cc58e8e --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Frontend/PCHWriterDecl.cpp @@ -0,0 +1,817 @@ +//===--- 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 { + 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 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 VisitUnresolvedUsingTypename(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 VisitUnresolvedUsingValue(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 VisitUsing(UsingDecl *D); + void VisitUsingShadow(UsingShadowDecl *D); + void VisitLinkageSpecDecl(LinkageSpecDecl *D); + void VisitFileScopeAsmDecl(FileScopeAsmDecl *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.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 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()); + 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); + 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()); + // FIXME: C++ InstantiatedFrom + 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->isThisDeclarationADefinition()); + if (D->isThisDeclarationADefinition()) + Writer.AddStmt(D->getBody()); + + 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()); + // FIXME: C++ TemplateOrInstantiation??? + 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()); + 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.AddTypeRef(D->getType(), Record); + // FIXME: stable encoding + Record.push_back((unsigned)D->getPropertyAttributes()); + // 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()); + 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()); + 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()); + 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() && + 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) // 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"); +} + +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()); + 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::VisitUsing(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()); + Code = pch::DECL_USING; +} + +void PCHDeclWriter::VisitUsingShadow(UsingShadowDecl *D) { + VisitNamedDecl(D); + Writer.AddDeclRef(D->getTargetDecl(), Record); + Writer.AddDeclRef(D->getUsingDecl(), 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::VisitUnresolvedUsingValue(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::VisitUnresolvedUsingTypename( + 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) { + // assert(false && "cannot write CXXRecordDecl"); + VisitRecordDecl(D); + Code = pch::DECL_CXX_RECORD; +} + +void PCHDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) { + // assert(false && "cannot write CXXMethodDecl"); + VisitFunctionDecl(D); + Code = pch::DECL_CXX_METHOD; +} + +void PCHDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) { + // assert(false && "cannot write CXXConstructorDecl"); + VisitCXXMethodDecl(D); + Code = pch::DECL_CXX_CONSTRUCTOR; +} + +void PCHDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) { + // assert(false && "cannot write CXXDestructorDecl"); + VisitCXXMethodDecl(D); + Code = pch::DECL_CXX_DESTRUCTOR; +} + +void PCHDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) { + // assert(false && "cannot write CXXConversionDecl"); + VisitCXXMethodDecl(D); + Code = pch::DECL_CXX_CONVERSION; +} + +void PCHDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) { + assert(false && "cannot write FriendTemplateDecl"); +} + +void PCHDeclWriter::VisitTemplateDecl(TemplateDecl *D) { + assert(false && "cannot write TemplateDecl"); +} + +void PCHDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) { + assert(false && "cannot write ClassTemplateDecl"); +} + +void PCHDeclWriter::VisitClassTemplateSpecializationDecl( + ClassTemplateSpecializationDecl *D) { + assert(false && "cannot write ClassTemplateSpecializationDecl"); +} + +void PCHDeclWriter::VisitClassTemplatePartialSpecializationDecl( + ClassTemplatePartialSpecializationDecl *D) { + assert(false && "cannot write ClassTemplatePartialSpecializationDecl"); +} + +void PCHDeclWriter::visitFunctionTemplateDecl(FunctionTemplateDecl *D) { + assert(false && "cannot write FunctionTemplateDecl"); +} + +void PCHDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) { + assert(false && "cannot write TemplateTypeParmDecl"); +} + +void PCHDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) { + assert(false && "cannot write NonTypeTemplateParmDecl"); +} + +void PCHDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) { + assert(false && "cannot write TemplateTemplateParmDecl"); +} + +void PCHDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) { + assert(false && "cannot write StaticAssertDecl"); +} + +/// \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 + // ParmVarDecl + Abv->Add(BitCodeAbbrevOp(0)); // ObjCDeclQualifier + Abv->Add(BitCodeAbbrevOp(0)); // HasInheritedDefaultArg + + 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); +} |
