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//===--- ASTReader.h - AST File Reader --------------------------*- C++ -*-===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This file defines the ASTReader class, which reads AST files.
#include "clang/Serialization/ASTBitCodes.h"
#include "clang/Serialization/ContinuousRangeMap.h"
#include "clang/Serialization/Module.h"
#include "clang/Serialization/ModuleManager.h"
#include "clang/Sema/ExternalSemaSource.h"
#include "clang/AST/DeclarationName.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/TemplateBase.h"
#include "clang/Lex/ExternalPreprocessorSource.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/PreprocessingRecord.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/FileSystemOptions.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Support/DataTypes.h"
#include <deque>
#include <map>
#include <string>
#include <utility>
#include <vector>
namespace llvm {
class MemoryBuffer;
namespace clang {
class AddrLabelExpr;
class ASTConsumer;
class ASTContext;
class ASTIdentifierIterator;
class ASTUnit; // FIXME: Layering violation and egregious hack.
class Attr;
class Decl;
class DeclContext;
class NestedNameSpecifier;
class CXXBaseSpecifier;
class CXXConstructorDecl;
class CXXCtorInitializer;
class GotoStmt;
class MacroDefinition;
class NamedDecl;
class OpaqueValueExpr;
class Preprocessor;
class Sema;
class SwitchCase;
class ASTDeserializationListener;
class ASTWriter;
class ASTReader;
class ASTDeclReader;
class ASTStmtReader;
class TypeLocReader;
struct HeaderFileInfo;
class VersionTuple;
struct PCHPredefinesBlock {
/// \brief The file ID for this predefines buffer in a PCH file.
FileID BufferID;
/// \brief This predefines buffer in a PCH file.
StringRef Data;
typedef SmallVector<PCHPredefinesBlock, 2> PCHPredefinesBlocks;
/// \brief Abstract interface for callback invocations by the ASTReader.
/// While reading an AST file, the ASTReader will call the methods of the
/// listener to pass on specific information. Some of the listener methods can
/// return true to indicate to the ASTReader that the information (and
/// consequently the AST file) is invalid.
class ASTReaderListener {
virtual ~ASTReaderListener();
/// \brief Receives the language options.
/// \returns true to indicate the options are invalid or false otherwise.
virtual bool ReadLanguageOptions(const LangOptions &LangOpts) {
return false;
/// \brief Receives the target triple.
/// \returns true to indicate the target triple is invalid or false otherwise.
virtual bool ReadTargetTriple(StringRef Triple) {
return false;
/// \brief Receives the contents of the predefines buffer.
/// \param Buffers Information about the predefines buffers.
/// \param OriginalFileName The original file name for the AST file, which
/// will appear as an entry in the predefines buffer.
/// \param SuggestedPredefines If necessary, additional definitions are added
/// here.
/// \returns true to indicate the predefines are invalid or false otherwise.
virtual bool ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers,
StringRef OriginalFileName,
std::string &SuggestedPredefines,
FileManager &FileMgr) {
return false;
/// \brief Receives a HeaderFileInfo entry.
virtual void ReadHeaderFileInfo(const HeaderFileInfo &HFI, unsigned ID) {}
/// \brief Receives __COUNTER__ value.
virtual void ReadCounter(unsigned Value) {}
/// \brief ASTReaderListener implementation to validate the information of
/// the PCH file against an initialized Preprocessor.
class PCHValidator : public ASTReaderListener {
Preprocessor &PP;
ASTReader &Reader;
unsigned NumHeaderInfos;
PCHValidator(Preprocessor &PP, ASTReader &Reader)
: PP(PP), Reader(Reader), NumHeaderInfos(0) {}
virtual bool ReadLanguageOptions(const LangOptions &LangOpts);
virtual bool ReadTargetTriple(StringRef Triple);
virtual bool ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers,
StringRef OriginalFileName,
std::string &SuggestedPredefines,
FileManager &FileMgr);
virtual void ReadHeaderFileInfo(const HeaderFileInfo &HFI, unsigned ID);
virtual void ReadCounter(unsigned Value);
void Error(const char *Msg);
namespace serialization {
class ReadMethodPoolVisitor;
namespace reader {
class ASTIdentifierLookupTrait;
/// \brief The on-disk hash table used for the DeclContext's Name lookup table.
typedef OnDiskChainedHashTable<ASTDeclContextNameLookupTrait>
} // end namespace serialization
/// \brief Reads an AST files chain containing the contents of a translation
/// unit.
/// The ASTReader class reads bitstreams (produced by the ASTWriter
/// class) containing the serialized representation of a given
/// abstract syntax tree and its supporting data structures. An
/// instance of the ASTReader can be attached to an ASTContext object,
/// which will provide access to the contents of the AST files.
/// The AST reader provides lazy de-serialization of declarations, as
/// required when traversing the AST. Only those AST nodes that are
/// actually required will be de-serialized.
class ASTReader
: public ExternalPreprocessorSource,
public ExternalPreprocessingRecordSource,
public ExternalHeaderFileInfoSource,
public ExternalSemaSource,
public IdentifierInfoLookup,
public ExternalIdentifierLookup,
public ExternalSLocEntrySource
enum ASTReadResult { Success, Failure, IgnorePCH };
/// \brief Types of AST files.
friend class PCHValidator;
friend class ASTDeclReader;
friend class ASTStmtReader;
friend class ASTIdentifierIterator;
friend class serialization::reader::ASTIdentifierLookupTrait;
friend class TypeLocReader;
friend class ASTWriter;
friend class ASTUnit; // ASTUnit needs to remap source locations.
friend class serialization::ReadMethodPoolVisitor;
typedef serialization::ModuleFile ModuleFile;
typedef serialization::ModuleKind ModuleKind;
typedef serialization::ModuleManager ModuleManager;
typedef ModuleManager::ModuleIterator ModuleIterator;
typedef ModuleManager::ModuleConstIterator ModuleConstIterator;
typedef ModuleManager::ModuleReverseIterator ModuleReverseIterator;
/// \brief The receiver of some callbacks invoked by ASTReader.
OwningPtr<ASTReaderListener> Listener;
/// \brief The receiver of deserialization events.
ASTDeserializationListener *DeserializationListener;
SourceManager &SourceMgr;
FileManager &FileMgr;
DiagnosticsEngine &Diags;
/// \brief The semantic analysis object that will be processing the
/// AST files and the translation unit that uses it.
Sema *SemaObj;
/// \brief The preprocessor that will be loading the source file.
Preprocessor &PP;
/// \brief The AST context into which we'll read the AST files.
ASTContext &Context;
/// \brief The AST consumer.
ASTConsumer *Consumer;
/// \brief The module manager which manages modules and their dependencies
ModuleManager ModuleMgr;
/// \brief A map of global bit offsets to the module that stores entities
/// at those bit offsets.
ContinuousRangeMap<uint64_t, ModuleFile*, 4> GlobalBitOffsetsMap;
/// \brief A map of negated SLocEntryIDs to the modules containing them.
ContinuousRangeMap<unsigned, ModuleFile*, 64> GlobalSLocEntryMap;
typedef ContinuousRangeMap<unsigned, ModuleFile*, 64> GlobalSLocOffsetMapType;
/// \brief A map of reversed (SourceManager::MaxLoadedOffset - SLocOffset)
/// SourceLocation offsets to the modules containing them.
GlobalSLocOffsetMapType GlobalSLocOffsetMap;
/// \brief Types that have already been loaded from the chain.
/// When the pointer at index I is non-NULL, the type with
/// ID = (I + 1) << FastQual::Width has already been loaded
std::vector<QualType> TypesLoaded;
typedef ContinuousRangeMap<serialization::TypeID, ModuleFile *, 4>
/// \brief Mapping from global type IDs to the module in which the
/// type resides along with the offset that should be added to the
/// global type ID to produce a local ID.
GlobalTypeMapType GlobalTypeMap;
/// \brief Declarations that have already been loaded from the chain.
/// When the pointer at index I is non-NULL, the declaration with ID
/// = I + 1 has already been loaded.
std::vector<Decl *> DeclsLoaded;
typedef ContinuousRangeMap<serialization::DeclID, ModuleFile *, 4>
/// \brief Mapping from global declaration IDs to the module in which the
/// declaration resides.
GlobalDeclMapType GlobalDeclMap;
typedef std::pair<ModuleFile *, uint64_t> FileOffset;
typedef SmallVector<FileOffset, 2> FileOffsetsTy;
typedef llvm::DenseMap<serialization::DeclID, FileOffsetsTy>
/// \brief Declarations that have modifications residing in a later file
/// in the chain.
DeclUpdateOffsetsMap DeclUpdateOffsets;
struct ReplacedDeclInfo {
ModuleFile *Mod;
uint64_t Offset;
unsigned RawLoc;
ReplacedDeclInfo() : Mod(0), Offset(0), RawLoc(0) {}
ReplacedDeclInfo(ModuleFile *Mod, uint64_t Offset, unsigned RawLoc)
: Mod(Mod), Offset(Offset), RawLoc(RawLoc) {}
typedef llvm::DenseMap<serialization::DeclID, ReplacedDeclInfo>
/// \brief Declarations that have been replaced in a later file in the chain.
DeclReplacementMap ReplacedDecls;
struct FileDeclsInfo {
ModuleFile *Mod;
ArrayRef<serialization::LocalDeclID> Decls;
FileDeclsInfo() : Mod(0) {}
FileDeclsInfo(ModuleFile *Mod, ArrayRef<serialization::LocalDeclID> Decls)
: Mod(Mod), Decls(Decls) {}
/// \brief Map from a FileID to the file-level declarations that it contains.
llvm::DenseMap<FileID, FileDeclsInfo> FileDeclIDs;
// Updates for visible decls can occur for other contexts than just the
// TU, and when we read those update records, the actual context will not
// be available yet (unless it's the TU), so have this pending map using the
// ID as a key. It will be realized when the context is actually loaded.
SmallVector<std::pair<serialization::reader::ASTDeclContextNameLookupTable *,
ModuleFile*>, 1> DeclContextVisibleUpdates;
typedef llvm::DenseMap<serialization::DeclID, DeclContextVisibleUpdates>
/// \brief Updates to the visible declarations of declaration contexts that
/// haven't been loaded yet.
DeclContextVisibleUpdatesPending PendingVisibleUpdates;
/// \brief The set of C++ or Objective-C classes that have forward
/// declarations that have not yet been linked to their definitions.
llvm::SmallPtrSet<Decl *, 4> PendingDefinitions;
/// \brief Read the records that describe the contents of declcontexts.
bool ReadDeclContextStorage(ModuleFile &M,
llvm::BitstreamCursor &Cursor,
const std::pair<uint64_t, uint64_t> &Offsets,
serialization::DeclContextInfo &Info);
/// \brief A vector containing identifiers that have already been
/// loaded.
/// If the pointer at index I is non-NULL, then it refers to the
/// IdentifierInfo for the identifier with ID=I+1 that has already
/// been loaded.
std::vector<IdentifierInfo *> IdentifiersLoaded;
typedef ContinuousRangeMap<serialization::IdentID, ModuleFile *, 4>
/// \brief Mapping from global identifer IDs to the module in which the
/// identifier resides along with the offset that should be added to the
/// global identifier ID to produce a local ID.
GlobalIdentifierMapType GlobalIdentifierMap;
/// \brief A vector containing submodules that have already been loaded.
/// This vector is indexed by the Submodule ID (-1). NULL submodule entries
/// indicate that the particular submodule ID has not yet been loaded.
SmallVector<Module *, 2> SubmodulesLoaded;
typedef ContinuousRangeMap<serialization::SubmoduleID, ModuleFile *, 4>
/// \brief Mapping from global submodule IDs to the module file in which the
/// submodule resides along with the offset that should be added to the
/// global submodule ID to produce a local ID.
GlobalSubmoduleMapType GlobalSubmoduleMap;
/// \brief A set of hidden declarations.
typedef llvm::SmallVector<llvm::PointerUnion<Decl *, IdentifierInfo *>, 2>
typedef llvm::DenseMap<Module *, HiddenNames> HiddenNamesMapType;
/// \brief A mapping from each of the hidden submodules to the deserialized
/// declarations in that submodule that could be made visible.
HiddenNamesMapType HiddenNamesMap;
/// \brief A module import or export that hasn't yet been resolved.
struct UnresolvedModuleImportExport {
/// \brief The file in which this module resides.
ModuleFile *File;
/// \brief The module that is importing or exporting.
Module *Mod;
/// \brief The local ID of the module that is being exported.
unsigned ID;
/// \brief Whether this is an import (vs. an export).
unsigned IsImport : 1;
/// \brief Whether this is a wildcard export.
unsigned IsWildcard : 1;
/// \brief The set of module imports and exports that still need to be
/// resolved.
llvm::SmallVector<UnresolvedModuleImportExport, 2>
/// \brief A vector containing selectors that have already been loaded.
/// This vector is indexed by the Selector ID (-1). NULL selector
/// entries indicate that the particular selector ID has not yet
/// been loaded.
SmallVector<Selector, 16> SelectorsLoaded;
typedef ContinuousRangeMap<serialization::SelectorID, ModuleFile *, 4>
/// \brief Mapping from global selector IDs to the module in which the
/// selector resides along with the offset that should be added to the
/// global selector ID to produce a local ID.
GlobalSelectorMapType GlobalSelectorMap;
/// \brief The generation number of the last time we loaded data from the
/// global method pool for this selector.
llvm::DenseMap<Selector, unsigned> SelectorGeneration;
/// \brief Mapping from identifiers that represent macros whose definitions
/// have not yet been deserialized to the global offset where the macro
/// record resides.
llvm::DenseMap<IdentifierInfo *, uint64_t> UnreadMacroRecordOffsets;
typedef ContinuousRangeMap<unsigned, ModuleFile *, 4>
/// \brief Mapping from global preprocessing entity IDs to the module in
/// which the preprocessed entity resides along with the offset that should be
/// added to the global preprocessing entitiy ID to produce a local ID.
GlobalPreprocessedEntityMapType GlobalPreprocessedEntityMap;
/// \name CodeGen-relevant special data
/// \brief Fields containing data that is relevant to CodeGen.
/// \brief The IDs of all declarations that fulfill the criteria of
/// "interesting" decls.
/// This contains the data loaded from all EXTERNAL_DEFINITIONS blocks in the
/// chain. The referenced declarations are deserialized and passed to the
/// consumer eagerly.
SmallVector<uint64_t, 16> ExternalDefinitions;
/// \brief The IDs of all tentative definitions stored in the the chain.
/// Sema keeps track of all tentative definitions in a TU because it has to
/// complete them and pass them on to CodeGen. Thus, tentative definitions in
/// the PCH chain must be eagerly deserialized.
SmallVector<uint64_t, 16> TentativeDefinitions;
/// \brief The IDs of all CXXRecordDecls stored in the chain whose VTables are
/// used.
/// CodeGen has to emit VTables for these records, so they have to be eagerly
/// deserialized.
SmallVector<uint64_t, 64> VTableUses;
/// \brief A snapshot of the pending instantiations in the chain.
/// This record tracks the instantiations that Sema has to perform at the
/// end of the TU. It consists of a pair of values for every pending
/// instantiation where the first value is the ID of the decl and the second
/// is the instantiation location.
SmallVector<uint64_t, 64> PendingInstantiations;
/// \name DiagnosticsEngine-relevant special data
/// \brief Fields containing data that is used for generating diagnostics
/// \brief A snapshot of Sema's unused file-scoped variable tracking, for
/// generating warnings.
SmallVector<uint64_t, 16> UnusedFileScopedDecls;
/// \brief A list of all the delegating constructors we've seen, to diagnose
/// cycles.
SmallVector<uint64_t, 4> DelegatingCtorDecls;
/// \brief Method selectors used in a @selector expression. Used for
/// implementation of -Wselector.
SmallVector<uint64_t, 64> ReferencedSelectorsData;
/// \brief A snapshot of Sema's weak undeclared identifier tracking, for
/// generating warnings.
SmallVector<uint64_t, 64> WeakUndeclaredIdentifiers;
/// \brief The IDs of type aliases for ext_vectors that exist in the chain.
/// Used by Sema for finding sugared names for ext_vectors in diagnostics.
SmallVector<uint64_t, 4> ExtVectorDecls;
/// \name Sema-relevant special data
/// \brief Fields containing data that is used for semantic analysis
/// \brief The IDs of all locally scoped external decls in the chain.
/// Sema tracks these to validate that the types are consistent across all
/// local external declarations.
SmallVector<uint64_t, 16> LocallyScopedExternalDecls;
/// \brief The IDs of all dynamic class declarations in the chain.
/// Sema tracks these because it checks for the key functions being defined
/// at the end of the TU, in which case it directs CodeGen to emit the VTable.
SmallVector<uint64_t, 16> DynamicClasses;
/// \brief The IDs of the declarations Sema stores directly.
/// Sema tracks a few important decls, such as namespace std, directly.
SmallVector<uint64_t, 4> SemaDeclRefs;
/// \brief The IDs of the types ASTContext stores directly.
/// The AST context tracks a few important types, such as va_list, directly.
SmallVector<uint64_t, 16> SpecialTypes;
/// \brief The IDs of CUDA-specific declarations ASTContext stores directly.
/// The AST context tracks a few important decls, currently cudaConfigureCall,
/// directly.
SmallVector<uint64_t, 2> CUDASpecialDeclRefs;
/// \brief The floating point pragma option settings.
SmallVector<uint64_t, 1> FPPragmaOptions;
/// \brief The OpenCL extension settings.
SmallVector<uint64_t, 1> OpenCLExtensions;
/// \brief A list of the namespaces we've seen.
SmallVector<uint64_t, 4> KnownNamespaces;
/// \brief A list of modules that were imported by precompiled headers or
/// any other non-module AST file.
SmallVector<serialization::SubmoduleID, 2> ImportedModules;
/// \brief The original file name that was used to build the primary AST file,
/// which may have been modified for relocatable-pch support.
std::string OriginalFileName;
/// \brief The actual original file name that was used to build the primary
/// AST file.
std::string ActualOriginalFileName;
/// \brief The file ID for the original file that was used to build the
/// primary AST file.
FileID OriginalFileID;
/// \brief The directory that the PCH was originally created in. Used to
/// allow resolving headers even after headers+PCH was moved to a new path.
std::string OriginalDir;
/// \brief The directory that the PCH we are reading is stored in.
std::string CurrentDir;
/// \brief Whether this precompiled header is a relocatable PCH file.
bool RelocatablePCH;
/// \brief The system include root to be used when loading the
/// precompiled header.
std::string isysroot;
/// \brief Whether to disable the normal validation performed on precompiled
/// headers when they are loaded.
bool DisableValidation;
/// \brief Whether to disable the use of stat caches in AST files.
bool DisableStatCache;
/// \brief Whether to accept an AST file with compiler errors.
bool AllowASTWithCompilerErrors;
/// \brief The current "generation" of the module file import stack, which
/// indicates how many separate module file load operations have occurred.
unsigned CurrentGeneration;
/// \brief Mapping from switch-case IDs in the chain to switch-case statements
/// Statements usually don't have IDs, but switch cases need them, so that the
/// switch statement can refer to them.
std::map<unsigned, SwitchCase *> SwitchCaseStmts;
std::map<unsigned, SwitchCase *> *CurrSwitchCaseStmts;
/// \brief The number of stat() calls that hit/missed the stat
/// cache.
unsigned NumStatHits, NumStatMisses;
/// \brief The number of source location entries de-serialized from
/// the PCH file.
unsigned NumSLocEntriesRead;
/// \brief The number of source location entries in the chain.
unsigned TotalNumSLocEntries;
/// \brief The number of statements (and expressions) de-serialized
/// from the chain.
unsigned NumStatementsRead;
/// \brief The total number of statements (and expressions) stored
/// in the chain.
unsigned TotalNumStatements;
/// \brief The number of macros de-serialized from the chain.
unsigned NumMacrosRead;
/// \brief The total number of macros stored in the chain.
unsigned TotalNumMacros;
/// \brief The number of selectors that have been read.
unsigned NumSelectorsRead;
/// \brief The number of method pool entries that have been read.
unsigned NumMethodPoolEntriesRead;
/// \brief The number of times we have looked up a selector in the method
/// pool and not found anything interesting.
unsigned NumMethodPoolMisses;
/// \brief The total number of method pool entries in the selector table.
unsigned TotalNumMethodPoolEntries;
/// Number of lexical decl contexts read/total.
unsigned NumLexicalDeclContextsRead, TotalLexicalDeclContexts;
/// Number of visible decl contexts read/total.
unsigned NumVisibleDeclContextsRead, TotalVisibleDeclContexts;
/// Total size of modules, in bits, currently loaded
uint64_t TotalModulesSizeInBits;
/// \brief Number of Decl/types that are currently deserializing.
unsigned NumCurrentElementsDeserializing;
/// \brief Set true while we are in the process of passing deserialized
/// "interesting" decls to consumer inside FinishedDeserializing().
/// This is used as a guard to avoid recursively repeating the process of
/// passing decls to consumer.
bool PassingDeclsToConsumer;
/// Number of CXX base specifiers currently loaded
unsigned NumCXXBaseSpecifiersLoaded;
/// \brief An IdentifierInfo that has been loaded but whose top-level
/// declarations of the same name have not (yet) been loaded.
struct PendingIdentifierInfo {
IdentifierInfo *II;
SmallVector<uint32_t, 4> DeclIDs;
/// \brief The set of identifiers that were read while the AST reader was
/// (recursively) loading declarations.
/// The declarations on the identifier chain for these identifiers will be
/// loaded once the recursive loading has completed.
std::deque<PendingIdentifierInfo> PendingIdentifierInfos;
/// \brief The generation number of each identifier, which keeps track of
/// the last time we loaded information about this identifier.
llvm::DenseMap<IdentifierInfo *, unsigned> IdentifierGeneration;
/// \brief Contains declarations and definitions that will be
/// "interesting" to the ASTConsumer, when we get that AST consumer.
/// "Interesting" declarations are those that have data that may
/// need to be emitted, such as inline function definitions or
/// Objective-C protocols.
std::deque<Decl *> InterestingDecls;
/// \brief The set of redeclarable declaraations that have been deserialized
/// since the last time the declaration chains were linked.
llvm::SmallPtrSet<Decl *, 16> RedeclsDeserialized;
/// \brief The list of redeclaration chains that still need to be
/// reconstructed.
/// Each element is the global declaration ID of the first declaration in
/// the chain. Elements in this vector should be unique; use
/// PendingDeclChainsKnown to ensure uniqueness.
llvm::SmallVector<serialization::DeclID, 16> PendingDeclChains;
/// \brief Keeps track of the elements added to PendingDeclChains.
llvm::SmallSet<serialization::DeclID, 16> PendingDeclChainsKnown;
/// \brief The set of Objective-C categories that have been deserialized
/// since the last time the declaration chains were linked.
llvm::SmallPtrSet<ObjCCategoryDecl *, 16> CategoriesDeserialized;
/// \brief The set of Objective-C class definitions that have already been
/// loaded, for which we will need to check for categories whenever a new
/// module is loaded.
llvm::SmallVector<ObjCInterfaceDecl *, 16> ObjCClassesLoaded;
typedef llvm::DenseMap<Decl *, llvm::SmallVector<serialization::DeclID, 2> >
/// \brief A mapping from canonical declarations to the set of additional
/// (global, previously-canonical) declaration IDs that have been merged with
/// that canonical declaration.
MergedDeclsMap MergedDecls;
typedef llvm::DenseMap<serialization::GlobalDeclID,
llvm::SmallVector<serialization::DeclID, 2> >
/// \brief A mapping from canonical declaration IDs to the set of additional
/// declaration IDs that have been merged with that canonical declaration.
/// This is the deserialized representation of the entries in MergedDecls.
/// When we query entries in MergedDecls, they will be augmented with entries
/// from StoredMergedDecls.
StoredMergedDeclsMap StoredMergedDecls;
/// \brief Combine the stored merged declarations for the given canonical
/// declaration into the set of merged declarations.
/// \returns An iterator into MergedDecls that corresponds to the position of
/// the given canonical declaration.
combineStoredMergedDecls(Decl *Canon, serialization::GlobalDeclID CanonID);
/// \brief Ready to load the previous declaration of the given Decl.
void loadAndAttachPreviousDecl(Decl *D, serialization::DeclID ID);
/// \brief When reading a Stmt tree, Stmt operands are placed in this stack.
SmallVector<Stmt *, 16> StmtStack;
/// \brief What kind of records we are reading.
enum ReadingKind {
Read_Decl, Read_Type, Read_Stmt
/// \brief What kind of records we are reading.
ReadingKind ReadingKind;
/// \brief RAII object to change the reading kind.
class ReadingKindTracker {
ASTReader &Reader;
enum ReadingKind PrevKind;
ReadingKindTracker(const ReadingKindTracker&); // do not implement
ReadingKindTracker &operator=(const ReadingKindTracker&);// do not implement
ReadingKindTracker(enum ReadingKind newKind, ASTReader &reader)
: Reader(reader), PrevKind(Reader.ReadingKind) {
Reader.ReadingKind = newKind;
~ReadingKindTracker() { Reader.ReadingKind = PrevKind; }
/// \brief All predefines buffers in the chain, to be treated as if
/// concatenated.
PCHPredefinesBlocks PCHPredefinesBuffers;
/// \brief Suggested contents of the predefines buffer, after this
/// PCH file has been processed.
/// In most cases, this string will be empty, because the predefines
/// buffer computed to build the PCH file will be identical to the
/// predefines buffer computed from the command line. However, when
/// there are differences that the PCH reader can work around, this
/// predefines buffer may contain additional definitions.
std::string SuggestedPredefines;
/// \brief Reads a statement from the specified cursor.
Stmt *ReadStmtFromStream(ModuleFile &F);
/// \brief Get a FileEntry out of stored-in-PCH filename, making sure we take
/// into account all the necessary relocations.
const FileEntry *getFileEntry(StringRef filename);
void MaybeAddSystemRootToFilename(std::string &Filename);
ASTReadResult ReadASTCore(StringRef FileName, ModuleKind Type,
ModuleFile *ImportedBy);
ASTReadResult ReadASTBlock(ModuleFile &F);
bool CheckPredefinesBuffers();
bool ParseLineTable(ModuleFile &F, SmallVectorImpl<uint64_t> &Record);
ASTReadResult ReadSourceManagerBlock(ModuleFile &F);
ASTReadResult ReadSLocEntryRecord(int ID);
llvm::BitstreamCursor &SLocCursorForID(int ID);
SourceLocation getImportLocation(ModuleFile *F);
ASTReadResult ReadSubmoduleBlock(ModuleFile &F);
bool ParseLanguageOptions(const SmallVectorImpl<uint64_t> &Record);
struct RecordLocation {
RecordLocation(ModuleFile *M, uint64_t O)
: F(M), Offset(O) {}
ModuleFile *F;
uint64_t Offset;
QualType readTypeRecord(unsigned Index);
RecordLocation TypeCursorForIndex(unsigned Index);
void LoadedDecl(unsigned Index, Decl *D);
Decl *ReadDeclRecord(serialization::DeclID ID);
RecordLocation DeclCursorForID(serialization::DeclID ID,
unsigned &RawLocation);
void loadDeclUpdateRecords(serialization::DeclID ID, Decl *D);
void loadPendingDeclChain(serialization::GlobalDeclID ID);
void loadObjCCategories(serialization::GlobalDeclID ID, ObjCInterfaceDecl *D,
unsigned PreviousGeneration = 0);
RecordLocation getLocalBitOffset(uint64_t GlobalOffset);
uint64_t getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset);
/// \brief Returns the first preprocessed entity ID that ends after \arg BLoc.
findBeginPreprocessedEntity(SourceLocation BLoc) const;
/// \brief Returns the first preprocessed entity ID that begins after \arg
/// ELoc.
findEndPreprocessedEntity(SourceLocation ELoc) const;
/// \brief \arg SLocMapI points at a chunk of a module that contains no
/// preprocessed entities or the entities it contains are not the ones we are
/// looking for. Find the next module that contains entities and return the ID
/// of the first entry.
GlobalSLocOffsetMapType::const_iterator SLocMapI) const;
/// \brief Returns (ModuleFile, Local index) pair for \arg GlobalIndex of a
/// preprocessed entity.
std::pair<ModuleFile *, unsigned>
getModulePreprocessedEntity(unsigned GlobalIndex);
void PassInterestingDeclsToConsumer();
void PassInterestingDeclToConsumer(Decl *D);
void finishPendingActions();
/// \brief Produce an error diagnostic and return true.
/// This routine should only be used for fatal errors that have to
/// do with non-routine failures (e.g., corrupted AST file).
void Error(StringRef Msg);
void Error(unsigned DiagID, StringRef Arg1 = StringRef(),
StringRef Arg2 = StringRef());
ASTReader(const ASTReader&); // do not implement
ASTReader &operator=(const ASTReader &); // do not implement
typedef SmallVector<uint64_t, 64> RecordData;
/// \brief Load the AST file and validate its contents against the given
/// Preprocessor.
/// \param PP the preprocessor associated with the context in which this
/// precompiled header will be loaded.
/// \param Context the AST context that this precompiled header will be
/// loaded into.
/// \param isysroot If non-NULL, the system include path specified by the
/// user. This is only used with relocatable PCH files. If non-NULL,
/// a relocatable PCH file will use the default path "/".
/// \param DisableValidation If true, the AST reader will suppress most
/// of its regular consistency checking, allowing the use of precompiled
/// headers that cannot be determined to be compatible.
/// \param DisableStatCache If true, the AST reader will ignore the
/// stat cache in the AST files. This performance pessimization can
/// help when an AST file is being used in cases where the
/// underlying files in the file system may have changed, but
/// parsing should still continue.
/// \param AllowASTWithCompilerErrors If true, the AST reader will accept an
/// AST file the was created out of an AST with compiler errors,
/// otherwise it will reject it.
ASTReader(Preprocessor &PP, ASTContext &Context, StringRef isysroot = "",
bool DisableValidation = false, bool DisableStatCache = false,
bool AllowASTWithCompilerErrors = false);
SourceManager &getSourceManager() const { return SourceMgr; }
/// \brief Load the AST file designated by the given file name.
ASTReadResult ReadAST(const std::string &FileName, ModuleKind Type);
/// \brief Checks that no file that is stored in PCH is out-of-sync with
/// the actual file in the file system.
ASTReadResult validateFileEntries(ModuleFile &M);
/// \brief Make the entities in the given module and any of its (non-explicit)
/// submodules visible to name lookup.
/// \param Mod The module whose names should be made visible.
/// \param Visibility The level of visibility to give the names in the module.
/// Visibility can only be increased over time.
void makeModuleVisible(Module *Mod,
Module::NameVisibilityKind NameVisibility);
/// \brief Make the names within this set of hidden names visible.
void makeNamesVisible(const HiddenNames &Names);
/// \brief Set the AST callbacks listener.
void setListener(ASTReaderListener *listener) {
/// \brief Set the AST deserialization listener.
void setDeserializationListener(ASTDeserializationListener *Listener);
/// \brief Initializes the ASTContext
void InitializeContext();
/// \brief Add in-memory (virtual file) buffer.
void addInMemoryBuffer(StringRef &FileName, llvm::MemoryBuffer *Buffer) {
ModuleMgr.addInMemoryBuffer(FileName, Buffer);
/// \brief Finalizes the AST reader's state before writing an AST file to
/// disk.
/// This operation may undo temporary state in the AST that should not be
/// emitted.
void finalizeForWriting();
/// \brief Retrieve the module manager.
ModuleManager &getModuleManager() { return ModuleMgr; }
/// \brief Retrieve the preprocessor.
Preprocessor &getPreprocessor() const { return PP; }
/// \brief Retrieve the name of the original source file name
const std::string &getOriginalSourceFile() { return OriginalFileName; }
/// \brief Retrieve the name of the original source file name directly from
/// the AST file, without actually loading the AST file.
static std::string getOriginalSourceFile(const std::string &ASTFileName,
FileManager &FileMgr,
DiagnosticsEngine &Diags);
/// \brief Returns the suggested contents of the predefines buffer,
/// which contains a (typically-empty) subset of the predefines
/// build prior to including the precompiled header.
const std::string &getSuggestedPredefines() { return SuggestedPredefines; }
/// \brief Read a preallocated preprocessed entity from the external source.
/// \returns null if an error occurred that prevented the preprocessed
/// entity from being loaded.
virtual PreprocessedEntity *ReadPreprocessedEntity(unsigned Index);
/// \brief Returns a pair of [Begin, End) indices of preallocated
/// preprocessed entities that \arg Range encompasses.
virtual std::pair<unsigned, unsigned>
findPreprocessedEntitiesInRange(SourceRange Range);
/// \brief Optionally returns true or false if the preallocated preprocessed
/// entity with index \arg Index came from file \arg FID.
virtual llvm::Optional<bool> isPreprocessedEntityInFileID(unsigned Index,
FileID FID);
/// \brief Read the header file information for the given file entry.
virtual HeaderFileInfo GetHeaderFileInfo(const FileEntry *FE);
void ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag);
/// \brief Returns the number of source locations found in the chain.
unsigned getTotalNumSLocs() const {
return TotalNumSLocEntries;
/// \brief Returns the number of identifiers found in the chain.
unsigned getTotalNumIdentifiers() const {
return static_cast<unsigned>(IdentifiersLoaded.size());
/// \brief Returns the number of types found in the chain.
unsigned getTotalNumTypes() const {
return static_cast<unsigned>(TypesLoaded.size());
/// \brief Returns the number of declarations found in the chain.
unsigned getTotalNumDecls() const {
return static_cast<unsigned>(DeclsLoaded.size());
/// \brief Returns the number of submodules known.
unsigned getTotalNumSubmodules() const {
return static_cast<unsigned>(SubmodulesLoaded.size());
/// \brief Returns the number of selectors found in the chain.
unsigned getTotalNumSelectors() const {
return static_cast<unsigned>(SelectorsLoaded.size());
/// \brief Returns the number of preprocessed entities known to the AST
/// reader.
unsigned getTotalNumPreprocessedEntities() const {
unsigned Result = 0;
for (ModuleConstIterator I = ModuleMgr.begin(),
E = ModuleMgr.end(); I != E; ++I) {
Result += (*I)->NumPreprocessedEntities;
return Result;
/// \brief Returns the number of C++ base specifiers found in the chain.
unsigned getTotalNumCXXBaseSpecifiers() const {
return NumCXXBaseSpecifiersLoaded;
/// \brief Reads a TemplateArgumentLocInfo appropriate for the
/// given TemplateArgument kind.
GetTemplateArgumentLocInfo(ModuleFile &F, TemplateArgument::ArgKind Kind,
const RecordData &Record, unsigned &Idx);
/// \brief Reads a TemplateArgumentLoc.
ReadTemplateArgumentLoc(ModuleFile &F,
const RecordData &Record, unsigned &Idx);
/// \brief Reads a declarator info from the given record.
TypeSourceInfo *GetTypeSourceInfo(ModuleFile &F,
const RecordData &Record, unsigned &Idx);
/// \brief Resolve a type ID into a type, potentially building a new
/// type.
QualType GetType(serialization::TypeID ID);
/// \brief Resolve a local type ID within a given AST file into a type.
QualType getLocalType(ModuleFile &F, unsigned LocalID);
/// \brief Map a local type ID within a given AST file into a global type ID.
serialization::TypeID getGlobalTypeID(ModuleFile &F, unsigned LocalID) const;
/// \brief Read a type from the current position in the given record, which
/// was read from the given AST file.
QualType readType(ModuleFile &F, const RecordData &Record, unsigned &Idx) {
if (Idx >= Record.size())
return QualType();
return getLocalType(F, Record[Idx++]);
/// \brief Map from a local declaration ID within a given module to a
/// global declaration ID.
serialization::DeclID getGlobalDeclID(ModuleFile &F, unsigned LocalID) const;
/// \brief Returns true if global DeclID \arg ID originated from module
/// \arg M.
bool isDeclIDFromModule(serialization::GlobalDeclID ID, ModuleFile &M) const;
/// \brief Retrieve the module file that owns the given declaration, or NULL
/// if the declaration is not from a module file.
ModuleFile *getOwningModuleFile(Decl *D);
/// \brief Returns the source location for the decl \arg ID.
SourceLocation getSourceLocationForDeclID(serialization::GlobalDeclID ID);
/// \brief Resolve a declaration ID into a declaration, potentially
/// building a new declaration.
Decl *GetDecl(serialization::DeclID ID);
virtual Decl *GetExternalDecl(uint32_t ID);
/// \brief Reads a declaration with the given local ID in the given module.
Decl *GetLocalDecl(ModuleFile &F, uint32_t LocalID) {
return GetDecl(getGlobalDeclID(F, LocalID));
/// \brief Reads a declaration with the given local ID in the given module.
/// \returns The requested declaration, casted to the given return type.
template<typename T>
T *GetLocalDeclAs(ModuleFile &F, uint32_t LocalID) {
return cast_or_null<T>(GetLocalDecl(F, LocalID));
/// \brief Map a global declaration ID into the declaration ID used to
/// refer to this declaration within the given module fule.
/// \returns the global ID of the given declaration as known in the given
/// module file.
mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
serialization::DeclID GlobalID);
/// \brief Reads a declaration ID from the given position in a record in the
/// given module.
/// \returns The declaration ID read from the record, adjusted to a global ID.
serialization::DeclID ReadDeclID(ModuleFile &F, const RecordData &Record,
unsigned &Idx);
/// \brief Reads a declaration from the given position in a record in the
/// given module.
Decl *ReadDecl(ModuleFile &F, const RecordData &R, unsigned &I) {
return GetDecl(ReadDeclID(F, R, I));
/// \brief Reads a declaration from the given position in a record in the
/// given module.
/// \returns The declaration read from this location, casted to the given
/// result type.
template<typename T>
T *ReadDeclAs(ModuleFile &F, const RecordData &R, unsigned &I) {
return cast_or_null<T>(GetDecl(ReadDeclID(F, R, I)));
/// \brief Read a CXXBaseSpecifiers ID form the given record and
/// return its global bit offset.
uint64_t readCXXBaseSpecifiers(ModuleFile &M, const RecordData &Record,
unsigned &Idx);
virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset);
/// \brief Resolve the offset of a statement into a statement.
/// This operation will read a new statement from the external
/// source each time it is called, and is meant to be used via a
/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
virtual Stmt *GetExternalDeclStmt(uint64_t Offset);
/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
/// specified cursor. Read the abbreviations that are at the top of the block
/// and then leave the cursor pointing into the block.
bool ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, unsigned BlockID);
/// \brief Finds all the visible declarations with a given name.
/// The current implementation of this method just loads the entire
/// lookup table as unmaterialized references.
virtual DeclContext::lookup_result
FindExternalVisibleDeclsByName(const DeclContext *DC,
DeclarationName Name);
/// \brief Read all of the declarations lexically stored in a
/// declaration context.
/// \param DC The declaration context whose declarations will be
/// read.
/// \param Decls Vector that will contain the declarations loaded
/// from the external source. The caller is responsible for merging
/// these declarations with any declarations already stored in the
/// declaration context.
/// \returns true if there was an error while reading the
/// declarations for this declaration context.
virtual ExternalLoadResult FindExternalLexicalDecls(const DeclContext *DC,
bool (*isKindWeWant)(Decl::Kind),
SmallVectorImpl<Decl*> &Decls);
/// \brief Get the decls that are contained in a file in the Offset/Length
/// range. \arg Length can be 0 to indicate a point at \arg Offset instead of
/// a range.
virtual void FindFileRegionDecls(FileID File, unsigned Offset,unsigned Length,
SmallVectorImpl<Decl *> &Decls);
/// \brief Notify ASTReader that we started deserialization of
/// a decl or type so until FinishedDeserializing is called there may be
/// decls that are initializing. Must be paired with FinishedDeserializing.
virtual void StartedDeserializing() { ++NumCurrentElementsDeserializing; }
/// \brief Notify ASTReader that we finished the deserialization of
/// a decl or type. Must be paired with StartedDeserializing.
virtual void FinishedDeserializing();
/// \brief Function that will be invoked when we begin parsing a new
/// translation unit involving this external AST source.
/// This function will provide all of the external definitions to
/// the ASTConsumer.
virtual void StartTranslationUnit(ASTConsumer *Consumer);
/// \brief Print some statistics about AST usage.
virtual void PrintStats();
/// \brief Dump information about the AST reader to standard error.
void dump();
/// Return the amount of memory used by memory buffers, breaking down
/// by heap-backed versus mmap'ed memory.
virtual void getMemoryBufferSizes(MemoryBufferSizes &sizes) const;
/// \brief Initialize the semantic source with the Sema instance
/// being used to perform semantic analysis on the abstract syntax
/// tree.
virtual void InitializeSema(Sema &S);
/// \brief Inform the semantic consumer that Sema is no longer available.
virtual void ForgetSema() { SemaObj = 0; }
/// \brief Retrieve the IdentifierInfo for the named identifier.
/// This routine builds a new IdentifierInfo for the given identifier. If any
/// declarations with this name are visible from translation unit scope, their
/// declarations will be deserialized and introduced into the declaration
/// chain of the identifier.
virtual IdentifierInfo *get(const char *NameStart, const char *NameEnd);
IdentifierInfo *get(StringRef Name) {
return get(Name.begin(), Name.end());
/// \brief Retrieve an iterator into the set of all identifiers
/// in all loaded AST files.
virtual IdentifierIterator *getIdentifiers() const;
/// \brief Load the contents of the global method pool for a given
/// selector.
virtual void ReadMethodPool(Selector Sel);
/// \brief Load the set of namespaces that are known to the external source,
/// which will be used during typo correction.
virtual void ReadKnownNamespaces(
SmallVectorImpl<NamespaceDecl *> &Namespaces);
virtual void ReadTentativeDefinitions(
SmallVectorImpl<VarDecl *> &TentativeDefs);
virtual void ReadUnusedFileScopedDecls(
SmallVectorImpl<const DeclaratorDecl *> &Decls);
virtual void ReadDelegatingConstructors(
SmallVectorImpl<CXXConstructorDecl *> &Decls);
virtual void ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls);
virtual void ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls);
virtual void ReadLocallyScopedExternalDecls(
SmallVectorImpl<NamedDecl *> &Decls);
virtual void ReadReferencedSelectors(
SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels);
virtual void ReadWeakUndeclaredIdentifiers(
SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WI);
virtual void ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables);
virtual void ReadPendingInstantiations(
SmallVectorImpl<std::pair<ValueDecl *,
SourceLocation> > &Pending);
/// \brief Load a selector from disk, registering its ID if it exists.
void LoadSelector(Selector Sel);
void SetIdentifierInfo(unsigned ID, IdentifierInfo *II);
void SetGloballyVisibleDecls(IdentifierInfo *II,
const SmallVectorImpl<uint32_t> &DeclIDs,
bool Nonrecursive = false);
/// \brief Report a diagnostic.
DiagnosticBuilder Diag(unsigned DiagID);
/// \brief Report a diagnostic.
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID);
IdentifierInfo *DecodeIdentifierInfo(serialization::IdentifierID ID);
IdentifierInfo *GetIdentifierInfo(ModuleFile &M, const RecordData &Record,
unsigned &Idx) {
return DecodeIdentifierInfo(getGlobalIdentifierID(M, Record[Idx++]));
virtual IdentifierInfo *GetIdentifier(serialization::IdentifierID ID) {
return DecodeIdentifierInfo(ID);
IdentifierInfo *getLocalIdentifier(ModuleFile &M, unsigned LocalID);
serialization::IdentifierID getGlobalIdentifierID(ModuleFile &M,
unsigned LocalID);
/// \brief Read the source location entry with index ID.
virtual bool ReadSLocEntry(int ID);
/// \brief Retrieve the global submodule ID given a module and its local ID
/// number.
getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID);
/// \brief Retrieve the submodule that corresponds to a global submodule ID.
Module *getSubmodule(serialization::SubmoduleID GlobalID);
/// \brief Retrieve a selector from the given module with its local ID
/// number.
Selector getLocalSelector(ModuleFile &M, unsigned LocalID);
Selector DecodeSelector(serialization::SelectorID Idx);
virtual Selector GetExternalSelector(serialization::SelectorID ID);
uint32_t GetNumExternalSelectors();
Selector ReadSelector(ModuleFile &M, const RecordData &Record, unsigned &Idx) {
return getLocalSelector(M, Record[Idx++]);
/// \brief Retrieve the global selector ID that corresponds to this
/// the local selector ID in a given module.
serialization::SelectorID getGlobalSelectorID(ModuleFile &F,
unsigned LocalID) const;
/// \brief Read a declaration name.
DeclarationName ReadDeclarationName(ModuleFile &F,
const RecordData &Record, unsigned &Idx);
void ReadDeclarationNameLoc(ModuleFile &F,
DeclarationNameLoc &DNLoc, DeclarationName Name,
const RecordData &Record, unsigned &Idx);
void ReadDeclarationNameInfo(ModuleFile &F, DeclarationNameInfo &NameInfo,
const RecordData &Record, unsigned &Idx);
void ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info,
const RecordData &Record, unsigned &Idx);
NestedNameSpecifier *ReadNestedNameSpecifier(ModuleFile &F,
const RecordData &Record,
unsigned &Idx);
NestedNameSpecifierLoc ReadNestedNameSpecifierLoc(ModuleFile &F,
const RecordData &Record,
unsigned &Idx);
/// \brief Read a template name.
TemplateName ReadTemplateName(ModuleFile &F, const RecordData &Record,
unsigned &Idx);
/// \brief Read a template argument.
TemplateArgument ReadTemplateArgument(ModuleFile &F,
const RecordData &Record,unsigned &Idx);
/// \brief Read a template parameter list.
TemplateParameterList *ReadTemplateParameterList(ModuleFile &F,
const RecordData &Record,
unsigned &Idx);
/// \brief Read a template argument array.
ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs,
ModuleFile &F, const RecordData &Record,
unsigned &Idx);
/// \brief Read a UnresolvedSet structure.
void ReadUnresolvedSet(ModuleFile &F, UnresolvedSetImpl &Set,
const RecordData &Record, unsigned &Idx);
/// \brief Read a C++ base specifier.
CXXBaseSpecifier ReadCXXBaseSpecifier(ModuleFile &F,
const RecordData &Record,unsigned &Idx);
/// \brief Read a CXXCtorInitializer array.
std::pair<CXXCtorInitializer **, unsigned>
ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record,
unsigned &Idx);
/// \brief Read a source location from raw form.
SourceLocation ReadSourceLocation(ModuleFile &ModuleFile, unsigned Raw) const {
SourceLocation Loc = SourceLocation::getFromRawEncoding(Raw);
assert(ModuleFile.SLocRemap.find(Loc.getOffset()) != ModuleFile.SLocRemap.end() &&
"Cannot find offset to remap.");
int Remap = ModuleFile.SLocRemap.find(Loc.getOffset())->second;
return Loc.getLocWithOffset(Remap);
/// \brief Read a source location.
SourceLocation ReadSourceLocation(ModuleFile &ModuleFile,
const RecordData &Record, unsigned& Idx) {
return ReadSourceLocation(ModuleFile, Record[Idx++]);
/// \brief Read a source range.
SourceRange ReadSourceRange(ModuleFile &F,
const RecordData &Record, unsigned& Idx);
/// \brief Read an integral value
llvm::APInt ReadAPInt(const RecordData &Record, unsigned &Idx);
/// \brief Read a signed integral value
llvm::APSInt ReadAPSInt(const RecordData &Record, unsigned &Idx);
/// \brief Read a floating-point value
llvm::APFloat ReadAPFloat(const RecordData &Record, unsigned &Idx);
// \brief Read a string
std::string ReadString(const RecordData &Record, unsigned &Idx);
/// \brief Read a version tuple.
VersionTuple ReadVersionTuple(const RecordData &Record, unsigned &Idx);
CXXTemporary *ReadCXXTemporary(ModuleFile &F, const RecordData &Record,
unsigned &Idx);
/// \brief Reads attributes from the current stream position.
void ReadAttributes(ModuleFile &F, AttrVec &Attrs,
const RecordData &Record, unsigned &Idx);
/// \brief Reads a statement.
Stmt *ReadStmt(ModuleFile &F);
/// \brief Reads an expression.
Expr *ReadExpr(ModuleFile &F);
/// \brief Reads a sub-statement operand during statement reading.
Stmt *ReadSubStmt() {
assert(ReadingKind == Read_Stmt &&
"Should be called only during statement reading!");
// Subexpressions are stored from last to first, so the next Stmt we need
// is at the back of the stack.
assert(!StmtStack.empty() && "Read too many sub statements!");
return StmtStack.pop_back_val();
/// \brief Reads a sub-expression operand during statement reading.
Expr *ReadSubExpr();
/// \brief Reads the macro record located at the given offset.
void ReadMacroRecord(ModuleFile &F, uint64_t Offset);
/// \brief Determine the global preprocessed entity ID that corresponds to
/// the given local ID within the given module.
getGlobalPreprocessedEntityID(ModuleFile &M, unsigned LocalID) const;
/// \brief Note that the identifier is a macro whose record will be loaded
/// from the given AST file at the given (file-local) offset.
/// \param II The name of the macro.
/// \param F The module file from which the macro definition was deserialized.
/// \param Offset The offset into the module file at which the macro
/// definition is located.
/// \param Visible Whether the macro should be made visible.
void setIdentifierIsMacro(IdentifierInfo *II, ModuleFile &F,
uint64_t Offset, bool Visible);
/// \brief Read the set of macros defined by this external macro source.
virtual void ReadDefinedMacros();
/// \brief Read the macro definition for this identifier.
virtual void LoadMacroDefinition(IdentifierInfo *II);
/// \brief Update an out-of-date identifier.
virtual void updateOutOfDateIdentifier(IdentifierInfo &II);
/// \brief Note that this identifier is up-to-date.
void markIdentifierUpToDate(IdentifierInfo *II);
/// \brief Read the macro definition corresponding to this iterator
/// into the unread macro record offsets table.
void LoadMacroDefinition(
llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos);
/// \brief Load all external visible decls in the given DeclContext.
void completeVisibleDeclsMap(const DeclContext *DC);
/// \brief Retrieve the AST context that this AST reader supplements.
ASTContext &getContext() { return Context; }
// \brief Contains declarations that were loaded before we have
// access to a Sema object.
SmallVector<NamedDecl *, 16> PreloadedDecls;
/// \brief Retrieve the semantic analysis object used to analyze the
/// translation unit in which the precompiled header is being
/// imported.
Sema *getSema() { return SemaObj; }
/// \brief Retrieve the identifier table associated with the
/// preprocessor.
IdentifierTable &getIdentifierTable();
/// \brief Record that the given ID maps to the given switch-case
/// statement.
void RecordSwitchCaseID(SwitchCase *SC, unsigned ID);
/// \brief Retrieve the switch-case statement with the given ID.
SwitchCase *getSwitchCaseWithID(unsigned ID);
void ClearSwitchCaseIDs();
/// \brief Helper class that saves the current stream position and
/// then restores it when destroyed.
struct SavedStreamPosition {
explicit SavedStreamPosition(llvm::BitstreamCursor &Cursor)
: Cursor(Cursor), Offset(Cursor.GetCurrentBitNo()) { }
~SavedStreamPosition() {
llvm::BitstreamCursor &Cursor;
uint64_t Offset;
inline void PCHValidator::Error(const char *Msg) {
} // end namespace clang