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Diffstat (limited to 'include/clang/Frontend/PCHReader.h')
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diff --git a/include/clang/Frontend/PCHReader.h b/include/clang/Frontend/PCHReader.h deleted file mode 100644 index 5aa90b717f..0000000000 --- a/include/clang/Frontend/PCHReader.h +++ /dev/null @@ -1,1009 +0,0 @@ -//===--- PCHReader.h - Precompiled Headers 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 PCHReader class, which reads a precompiled header. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_CLANG_FRONTEND_PCH_READER_H -#define LLVM_CLANG_FRONTEND_PCH_READER_H - -#include "clang/Frontend/PCHBitCodes.h" -#include "clang/AST/DeclarationName.h" -#include "clang/Sema/ExternalSemaSource.h" -#include "clang/AST/DeclObjC.h" -#include "clang/AST/Type.h" -#include "clang/AST/TemplateBase.h" -#include "clang/Lex/ExternalPreprocessorSource.h" -#include "clang/Lex/PreprocessingRecord.h" -#include "clang/Basic/Diagnostic.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/DenseMap.h" -#include "llvm/ADT/OwningPtr.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/ADT/StringRef.h" -#include "llvm/Bitcode/BitstreamReader.h" -#include "llvm/System/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 Attr; -class Decl; -class DeclContext; -class NestedNameSpecifier; -class CXXBaseSpecifier; -class CXXBaseOrMemberInitializer; -class GotoStmt; -class LabelStmt; -class MacroDefinition; -class NamedDecl; -class PCHDeserializationListener; -class Preprocessor; -class Sema; -class SwitchCase; -class PCHReader; -class PCHDeclReader; -struct HeaderFileInfo; - -struct PCHPredefinesBlock { - /// \brief The file ID for this predefines buffer in a PCH file. - FileID BufferID; - - /// \brief This predefines buffer in a PCH file. - llvm::StringRef Data; -}; -typedef llvm::SmallVector<PCHPredefinesBlock, 2> PCHPredefinesBlocks; - -/// \brief Abstract interface for callback invocations by the PCHReader. -/// -/// While reading a PCH file, the PCHReader will call the methods of the -/// listener to pass on specific information. Some of the listener methods can -/// return true to indicate to the PCHReader that the information (and -/// consequently the PCH file) is invalid. -class PCHReaderListener { -public: - virtual ~PCHReaderListener(); - - /// \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(llvm::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 PCH, 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, - llvm::StringRef OriginalFileName, - std::string &SuggestedPredefines) { - 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 PCHReaderListener implementation to validate the information of -/// the PCH file against an initialized Preprocessor. -class PCHValidator : public PCHReaderListener { - Preprocessor &PP; - PCHReader &Reader; - - unsigned NumHeaderInfos; - -public: - PCHValidator(Preprocessor &PP, PCHReader &Reader) - : PP(PP), Reader(Reader), NumHeaderInfos(0) {} - - virtual bool ReadLanguageOptions(const LangOptions &LangOpts); - virtual bool ReadTargetTriple(llvm::StringRef Triple); - virtual bool ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, - llvm::StringRef OriginalFileName, - std::string &SuggestedPredefines); - virtual void ReadHeaderFileInfo(const HeaderFileInfo &HFI, unsigned ID); - virtual void ReadCounter(unsigned Value); - -private: - void Error(const char *Msg); -}; - -/// \brief Reads a precompiled header chain containing the contents of a -/// translation unit. -/// -/// The PCHReader class reads bitstreams (produced by the PCHWriter -/// class) containing the serialized representation of a given -/// abstract syntax tree and its supporting data structures. An -/// instance of the PCHReader can be attached to an ASTContext object, -/// which will provide access to the contents of the PCH files. -/// -/// The PCH 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 PCHReader - : public ExternalPreprocessorSource, - public ExternalPreprocessingRecordSource, - public ExternalSemaSource, - public IdentifierInfoLookup, - public ExternalIdentifierLookup, - public ExternalSLocEntrySource { -public: - enum PCHReadResult { Success, Failure, IgnorePCH }; - friend class PCHValidator; - friend class PCHDeclReader; -private: - /// \brief The receiver of some callbacks invoked by PCHReader. - llvm::OwningPtr<PCHReaderListener> Listener; - - /// \brief The receiver of deserialization events. - PCHDeserializationListener *DeserializationListener; - - SourceManager &SourceMgr; - FileManager &FileMgr; - Diagnostic &Diags; - - /// \brief The semantic analysis object that will be processing the - /// PCH 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 PCH files. - ASTContext *Context; - - /// \brief The AST consumer. - ASTConsumer *Consumer; - - /// \brief Information that is needed for every file in the chain. - struct PerFileData { - PerFileData(); - - /// \brief The PCH stat cache installed for this file, if any. - /// - /// The dynamic type of this stat cache is always PCHStatCache - void *StatCache; - - /// \brief The bitstream reader from which we'll read the PCH file. - llvm::BitstreamReader StreamFile; - llvm::BitstreamCursor Stream; - - /// \brief The size of this file, in bits. - uint64_t SizeInBits; - - /// \brief The cursor to the start of the preprocessor block, which stores - /// all of the macro definitions. - llvm::BitstreamCursor MacroCursor; - - /// DeclsCursor - This is a cursor to the start of the DECLS_BLOCK block. It - /// has read all the abbreviations at the start of the block and is ready to - /// jump around with these in context. - llvm::BitstreamCursor DeclsCursor; - - /// \brief The file name of the PCH file. - std::string FileName; - - /// \brief The memory buffer that stores the data associated with - /// this PCH file. - llvm::OwningPtr<llvm::MemoryBuffer> Buffer; - - /// \brief Cursor used to read source location entries. - llvm::BitstreamCursor SLocEntryCursor; - - /// \brief The number of source location entries in this PCH file. - unsigned LocalNumSLocEntries; - - /// \brief Offsets for all of the source location entries in the - /// PCH file. - const uint32_t *SLocOffsets; - - /// \brief The number of types in this PCH file. - unsigned LocalNumTypes; - - /// \brief Offset of each type within the bitstream, indexed by the - /// type ID, or the representation of a Type*. - const uint32_t *TypeOffsets; - - /// \brief The number of declarations in this PCH file. - unsigned LocalNumDecls; - - /// \brief Offset of each declaration within the bitstream, indexed - /// by the declaration ID (-1). - const uint32_t *DeclOffsets; - - /// \brief The number of identifiers in this PCH file. - unsigned LocalNumIdentifiers; - - /// \brief Offsets into the identifier table data. - /// - /// This array is indexed by the identifier ID (-1), and provides - /// the offset into IdentifierTableData where the string data is - /// stored. - const uint32_t *IdentifierOffsets; - - /// \brief Actual data for the on-disk hash table. - /// - // This pointer points into a memory buffer, where the on-disk hash - // table for identifiers actually lives. - const char *IdentifierTableData; - - /// \brief A pointer to an on-disk hash table of opaque type - /// IdentifierHashTable. - void *IdentifierLookupTable; - - /// \brief The number of macro definitions in this file. - unsigned LocalNumMacroDefinitions; - - /// \brief Offsets of all of the macro definitions in the preprocessing - /// record in the PCH file. - const uint32_t *MacroDefinitionOffsets; - - /// \brief The number of preallocated preprocessing entities in the - /// preprocessing record. - unsigned NumPreallocatedPreprocessingEntities; - - /// \brief A pointer to an on-disk hash table of opaque type - /// PCHSelectorLookupTable. - /// - /// This hash table provides the IDs of all selectors, and the associated - /// instance and factory methods. - void *SelectorLookupTable; - - /// \brief A pointer to the character data that comprises the selector table - /// - /// The SelectorOffsets table refers into this memory. - const unsigned char *SelectorLookupTableData; - - /// \brief Offsets into the method pool lookup table's data array - /// where each selector resides. - const uint32_t *SelectorOffsets; - - /// \brief The number of selectors new to this file. - /// - /// This is the number of entries in SelectorOffsets. - unsigned LocalNumSelectors; - }; - - /// \brief The chain of PCH files. The first entry is the one named by the - /// user, the last one is the one that doesn't depend on anything further. - /// That is, the entry I was created with -include-pch I+1. - llvm::SmallVector<PerFileData*, 2> Chain; - - /// \brief Types that have already been loaded from the PCH file. - /// - /// When the pointer at index I is non-NULL, the type with - /// ID = (I + 1) << FastQual::Width has already been loaded from the PCH chain - std::vector<QualType> TypesLoaded; - - /// \brief Declarations that have already been loaded from the PCH file. - /// - /// When the pointer at index I is non-NULL, the declaration with ID - /// = I + 1 has already been loaded. - std::vector<Decl *> DeclsLoaded; - - typedef llvm::DenseMap<pch::DeclID, std::pair<PerFileData *, uint64_t> > - DeclReplacementMap; - /// \brief Declarations that have been replaced in a later file in the chain. - DeclReplacementMap ReplacedDecls; - - /// \brief Information about the contents of a DeclContext. - struct DeclContextInfo { - llvm::BitstreamCursor *Stream; - uint64_t OffsetToVisibleDecls; - const pch::DeclID *LexicalDecls; - unsigned NumLexicalDecls; - }; - typedef llvm::SmallVector<DeclContextInfo, 1> DeclContextInfos; - typedef llvm::DenseMap<const DeclContext *, DeclContextInfos> - DeclContextOffsetsMap; - - /// \brief Offsets of the lexical and visible declarations for each - /// DeclContext. - DeclContextOffsetsMap DeclContextOffsets; - - typedef llvm::DenseMap<pch::DeclID, pch::DeclID> FirstLatestDeclIDMap; - /// \brief Map of first declarations from a chained PCH that point to the - /// most recent declarations in another PCH. - FirstLatestDeclIDMap FirstLatestDeclIDs; - - /// \brief Read the records that describe the contents of declcontexts. - bool ReadDeclContextStorage(llvm::BitstreamCursor &Cursor, - const std::pair<uint64_t, uint64_t> &Offsets, - 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; - - /// \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. - llvm::SmallVector<Selector, 16> SelectorsLoaded; - - /// \brief Method selectors used in a @selector expression. Used for - /// implementation of -Wselector. - llvm::SmallVector<long long unsigned int,64u> ReferencedSelectorsData; - - /// \brief The macro definitions we have already loaded. - llvm::SmallVector<MacroDefinition *, 16> MacroDefinitionsLoaded; - - /// \brief The set of external definitions stored in the the PCH - /// file. - llvm::SmallVector<uint64_t, 16> ExternalDefinitions; - - /// \brief The set of tentative definitions stored in the the PCH - /// file. - llvm::SmallVector<uint64_t, 16> TentativeDefinitions; - - /// \brief The set of unused file scoped decls stored in the the PCH file. - llvm::SmallVector<uint64_t, 16> UnusedFileScopedDecls; - - /// \brief The set of weak undeclared identifiers stored in the the PCH file. - llvm::SmallVector<uint64_t, 64> WeakUndeclaredIdentifiers; - - /// \brief The set of locally-scoped external declarations stored in - /// the the PCH file. - llvm::SmallVector<uint64_t, 16> LocallyScopedExternalDecls; - - /// \brief The set of ext_vector type declarations stored in the the - /// PCH file. - llvm::SmallVector<uint64_t, 4> ExtVectorDecls; - - /// \brief The set of VTable uses of CXXRecordDecls stored in the PCH file. - llvm::SmallVector<uint64_t, 64> VTableUses; - - /// \brief The set of dynamic CXXRecord declarations stored in the PCH file. - llvm::SmallVector<uint64_t, 16> DynamicClasses; - - /// \brief The set of pending implicit instantiations stored in the PCH file. - llvm::SmallVector<uint64_t, 64> PendingImplicitInstantiations; - - /// \brief The set of Sema declaration references, stored in PCH. - llvm::SmallVector<uint64_t, 4> SemaDeclRefs; - - /// \brief The set of Objective-C category definitions stored in the - /// the PCH file. - llvm::SmallVector<uint64_t, 4> ObjCCategoryImpls; - - /// \brief The original file name that was used to build the PCH 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 PCH file. - std::string ActualOriginalFileName; - - /// \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. - const char *isysroot; - - /// \brief Whether to disable the normal validation performed on precompiled - /// headers when they are loaded. - bool DisableValidation; - - /// \brief Mapping from switch-case IDs in the PCH file to - /// switch-case statements. - std::map<unsigned, SwitchCase *> SwitchCaseStmts; - - /// \brief Mapping from label statement IDs in the PCH file to label - /// statements. - std::map<unsigned, LabelStmt *> LabelStmts; - - /// \brief Mapping from label IDs to the set of "goto" statements - /// that point to that label before the label itself has been - /// de-serialized. - std::multimap<unsigned, GotoStmt *> UnresolvedGotoStmts; - - /// \brief Mapping from label IDs to the set of address label - /// expressions that point to that label before the label itself has - /// been de-serialized. - std::multimap<unsigned, AddrLabelExpr *> UnresolvedAddrLabelExprs; - - /// \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 all PCH files. - unsigned TotalNumSLocEntries; - - /// \brief The number of statements (and expressions) de-serialized - /// from the PCH file. - unsigned NumStatementsRead; - - /// \brief The total number of statements (and expressions) stored - /// in the PCH file. - unsigned TotalNumStatements; - - /// \brief The number of macros de-serialized from the PCH file. - unsigned NumMacrosRead; - - /// \brief The total number of macros stored in the PCH file. - 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; - - /// \brief Number of Decl/types that are currently deserializing. - unsigned NumCurrentElementsDeserializing; - - /// \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; - llvm::SmallVector<uint32_t, 4> DeclIDs; - }; - - /// \brief The set of identifiers that were read while the PCH 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 FIXME: document! - llvm::SmallVector<uint64_t, 16> SpecialTypes; - - /// \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 When reading a Stmt tree, Stmt operands are placed in this stack. - llvm::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 { - PCHReader &Reader; - enum ReadingKind PrevKind; - - ReadingKindTracker(const ReadingKindTracker&); // do not implement - ReadingKindTracker &operator=(const ReadingKindTracker&);// do not implement - - public: - ReadingKindTracker(enum ReadingKind newKind, PCHReader &reader) - : Reader(reader), PrevKind(Reader.ReadingKind) { - Reader.ReadingKind = newKind; - } - - ~ReadingKindTracker() { Reader.ReadingKind = PrevKind; } - }; - - /// \brief All predefines buffers in all PCH files, 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(llvm::BitstreamCursor &Cursor); - - void MaybeAddSystemRootToFilename(std::string &Filename); - - PCHReadResult ReadPCHCore(llvm::StringRef FileName); - PCHReadResult ReadPCHBlock(PerFileData &F); - bool CheckPredefinesBuffers(); - bool ParseLineTable(llvm::SmallVectorImpl<uint64_t> &Record); - PCHReadResult ReadSourceManagerBlock(PerFileData &F); - PCHReadResult ReadSLocEntryRecord(unsigned ID); - llvm::BitstreamCursor &SLocCursorForID(unsigned ID); - bool ParseLanguageOptions(const llvm::SmallVectorImpl<uint64_t> &Record); - - typedef std::pair<llvm::BitstreamCursor *, uint64_t> RecordLocation; - - QualType ReadTypeRecord(unsigned Index); - RecordLocation TypeCursorForIndex(unsigned Index); - void LoadedDecl(unsigned Index, Decl *D); - Decl *ReadDeclRecord(unsigned Index, pch::DeclID ID); - RecordLocation DeclCursorForIndex(unsigned Index, pch::DeclID ID); - - void PassInterestingDeclsToConsumer(); - - /// \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 PCH file). - void Error(const char *Msg); - - PCHReader(const PCHReader&); // do not implement - PCHReader &operator=(const PCHReader &); // do not implement -public: - typedef llvm::SmallVector<uint64_t, 64> RecordData; - - /// \brief Load the PCH 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 PCH reader will suppress most - /// of its regular consistency checking, allowing the use of precompiled - /// headers that cannot be determined to be compatible. - PCHReader(Preprocessor &PP, ASTContext *Context, const char *isysroot = 0, - bool DisableValidation = false); - - /// \brief Load the PCH file without using any pre-initialized Preprocessor. - /// - /// The necessary information to initialize a Preprocessor later can be - /// obtained by setting a PCHReaderListener. - /// - /// \param SourceMgr the source manager into which the precompiled header - /// will be loaded. - /// - /// \param FileMgr the file manager into which the precompiled header will - /// be loaded. - /// - /// \param Diags the diagnostics system to use for reporting errors and - /// warnings relevant to loading the precompiled header. - /// - /// \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 PCH reader will suppress most - /// of its regular consistency checking, allowing the use of precompiled - /// headers that cannot be determined to be compatible. - PCHReader(SourceManager &SourceMgr, FileManager &FileMgr, - Diagnostic &Diags, const char *isysroot = 0, - bool DisableValidation = false); - ~PCHReader(); - - /// \brief Load the precompiled header designated by the given file - /// name. - PCHReadResult ReadPCH(const std::string &FileName); - - /// \brief Set the PCH callbacks listener. - void setListener(PCHReaderListener *listener) { - Listener.reset(listener); - } - - /// \brief Set the PCH deserialization listener. - void setDeserializationListener(PCHDeserializationListener *Listener); - - /// \brief Set the Preprocessor to use. - void setPreprocessor(Preprocessor &pp); - - /// \brief Sets and initializes the given Context. - void InitializeContext(ASTContext &Context); - - /// \brief Retrieve the name of the named (primary) PCH file - const std::string &getFileName() const { return Chain[0]->FileName; } - - /// \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 PCH file, without actually loading the PCH - /// file. - static std::string getOriginalSourceFile(const std::string &PCHFileName, - Diagnostic &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 preprocessed entities into the - virtual void ReadPreprocessedEntities(); - - /// \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 selectors found in the chain. - unsigned getTotalNumSelectors() const { - return static_cast<unsigned>(SelectorsLoaded.size()); - } - - /// \brief Reads a TemplateArgumentLocInfo appropriate for the - /// given TemplateArgument kind. - TemplateArgumentLocInfo - GetTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind, - llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record, unsigned &Idx); - - /// \brief Reads a TemplateArgumentLoc. - TemplateArgumentLoc - ReadTemplateArgumentLoc(llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record, unsigned &Idx); - - /// \brief Reads a declarator info from the given record. - TypeSourceInfo *GetTypeSourceInfo(llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record, unsigned &Idx); - - /// \brief Resolve and return the translation unit declaration. - TranslationUnitDecl *GetTranslationUnitDecl(); - - /// \brief Resolve a type ID into a type, potentially building a new - /// type. - QualType GetType(pch::TypeID ID); - - /// \brief Resolve a declaration ID into a declaration, potentially - /// building a new declaration. - Decl *GetDecl(pch::DeclID ID); - virtual Decl *GetExternalDecl(uint32_t ID); - - /// \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 bool FindExternalLexicalDecls(const DeclContext *DC, - llvm::SmallVectorImpl<Decl*> &Decls); - - /// \brief Notify PCHReader 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 PCHReader 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 PCH usage. - virtual void PrintStats(); - - /// \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(llvm::StringRef Name) { - return get(Name.begin(), Name.end()); - } - - /// \brief Load the contents of the global method pool for a given - /// selector. - /// - /// \returns a pair of Objective-C methods lists containing the - /// instance and factory methods, respectively, with this selector. - virtual std::pair<ObjCMethodList, ObjCMethodList> - ReadMethodPool(Selector Sel); - - /// \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 llvm::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(unsigned Idx); - - IdentifierInfo *GetIdentifierInfo(const RecordData &Record, unsigned &Idx) { - return DecodeIdentifierInfo(Record[Idx++]); - } - - virtual IdentifierInfo *GetIdentifier(unsigned ID) { - return DecodeIdentifierInfo(ID); - } - - /// \brief Read the source location entry with index ID. - virtual void ReadSLocEntry(unsigned ID); - - Selector DecodeSelector(unsigned Idx); - - virtual Selector GetExternalSelector(uint32_t ID); - uint32_t GetNumExternalSelectors(); - - Selector GetSelector(const RecordData &Record, unsigned &Idx) { - return DecodeSelector(Record[Idx++]); - } - - /// \brief Read a declaration name. - DeclarationName ReadDeclarationName(const RecordData &Record, unsigned &Idx); - - NestedNameSpecifier *ReadNestedNameSpecifier(const RecordData &Record, - unsigned &Idx); - - /// \brief Read a template name. - TemplateName ReadTemplateName(const RecordData &Record, unsigned &Idx); - - /// \brief Read a template argument. - TemplateArgument ReadTemplateArgument(llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record,unsigned &Idx); - - /// \brief Read a template parameter list. - TemplateParameterList *ReadTemplateParameterList(const RecordData &Record, - unsigned &Idx); - - /// \brief Read a template argument array. - void - ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, - llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record, unsigned &Idx); - - /// \brief Read a UnresolvedSet structure. - void ReadUnresolvedSet(UnresolvedSetImpl &Set, - const RecordData &Record, unsigned &Idx); - - /// \brief Read a C++ base specifier. - CXXBaseSpecifier ReadCXXBaseSpecifier(llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record,unsigned &Idx); - - /// \brief Read a CXXBaseOrMemberInitializer array. - std::pair<CXXBaseOrMemberInitializer **, unsigned> - ReadCXXBaseOrMemberInitializers(llvm::BitstreamCursor &DeclsCursor, - const RecordData &Record, unsigned &Idx); - - /// \brief Read a source location. - SourceLocation ReadSourceLocation(const RecordData &Record, unsigned& Idx) { - return SourceLocation::getFromRawEncoding(Record[Idx++]); - } - - /// \brief Read a source range. - SourceRange ReadSourceRange(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); - - CXXTemporary *ReadCXXTemporary(const RecordData &Record, unsigned &Idx); - - /// \brief Reads attributes from the current stream position. - Attr *ReadAttributes(llvm::BitstreamCursor &DeclsCursor); - - /// \brief Reads a statement. - Stmt *ReadStmt(llvm::BitstreamCursor &Cursor); - - /// \brief Reads an expression. - Expr *ReadExpr(llvm::BitstreamCursor &Cursor); - - /// \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(llvm::BitstreamCursor &Stream, uint64_t Offset); - - /// \brief Read the set of macros defined by this external macro source. - virtual void ReadDefinedMacros(); - - /// \brief Retrieve the macro definition with the given ID. - MacroDefinition *getMacroDefinition(pch::IdentID ID); - - /// \brief Retrieve the AST context that this PCH reader - /// supplements. - ASTContext *getContext() { return Context; } - - // \brief Contains declarations that were loaded before we have - // access to a Sema object. - llvm::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); - - /// \brief Record that the given label statement has been - /// deserialized and has the given ID. - void RecordLabelStmt(LabelStmt *S, unsigned ID); - - /// \brief Set the label of the given statement to the label - /// identified by ID. - /// - /// Depending on the order in which the label and other statements - /// referencing that label occur, this operation may complete - /// immediately (updating the statement) or i |