Reintroduce the serialization library, with fixed dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111279 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/PCHReader.cpp b/lib/Serialization/PCHReader.cpp
new file mode 100644
index 0000000..852bbaf
--- /dev/null
+++ b/lib/Serialization/PCHReader.cpp
@@ -0,0 +1,3857 @@
+//===--- PCHReader.cpp - 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.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Serialization/PCHReader.h"
+#include "clang/Serialization/PCHDeserializationListener.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/Utils.h"
+#include "clang/Sema/Sema.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/Type.h"
+#include "clang/AST/TypeLocVisitor.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/PreprocessingRecord.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Basic/OnDiskHashTable.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/SourceManagerInternals.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/Version.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/System/Path.h"
+#include <algorithm>
+#include <iterator>
+#include <cstdio>
+#include <sys/stat.h>
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// PCH reader validator implementation
+//===----------------------------------------------------------------------===//
+
+PCHReaderListener::~PCHReaderListener() {}
+
+bool
+PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) {
+ const LangOptions &PPLangOpts = PP.getLangOptions();
+#define PARSE_LANGOPT_BENIGN(Option)
+#define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \
+ if (PPLangOpts.Option != LangOpts.Option) { \
+ Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \
+ return true; \
+ }
+
+ PARSE_LANGOPT_BENIGN(Trigraphs);
+ PARSE_LANGOPT_BENIGN(BCPLComment);
+ PARSE_LANGOPT_BENIGN(DollarIdents);
+ PARSE_LANGOPT_BENIGN(AsmPreprocessor);
+ PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions);
+ PARSE_LANGOPT_IMPORTANT(GNUKeywords, diag::warn_pch_gnu_keywords);
+ PARSE_LANGOPT_BENIGN(ImplicitInt);
+ PARSE_LANGOPT_BENIGN(Digraphs);
+ PARSE_LANGOPT_BENIGN(HexFloats);
+ PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99);
+ PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions);
+ PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus);
+ PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x);
+ PARSE_LANGOPT_BENIGN(CXXOperatorName);
+ PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c);
+ PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2);
+ PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi);
+ PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI2, diag::warn_pch_nonfragile_abi2);
+ PARSE_LANGOPT_IMPORTANT(NoConstantCFStrings,
+ diag::warn_pch_no_constant_cfstrings);
+ PARSE_LANGOPT_BENIGN(PascalStrings);
+ PARSE_LANGOPT_BENIGN(WritableStrings);
+ PARSE_LANGOPT_IMPORTANT(LaxVectorConversions,
+ diag::warn_pch_lax_vector_conversions);
+ PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec);
+ PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions);
+ PARSE_LANGOPT_IMPORTANT(SjLjExceptions, diag::warn_pch_sjlj_exceptions);
+ PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime);
+ PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding);
+ PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins);
+ PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics,
+ diag::warn_pch_thread_safe_statics);
+ PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads);
+ PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks);
+ PARSE_LANGOPT_BENIGN(EmitAllDecls);
+ PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno);
+ PARSE_LANGOPT_BENIGN(getSignedOverflowBehavior());
+ PARSE_LANGOPT_IMPORTANT(HeinousExtensions,
+ diag::warn_pch_heinous_extensions);
+ // FIXME: Most of the options below are benign if the macro wasn't
+ // used. Unfortunately, this means that a PCH compiled without
+ // optimization can't be used with optimization turned on, even
+ // though the only thing that changes is whether __OPTIMIZE__ was
+ // defined... but if __OPTIMIZE__ never showed up in the header, it
+ // doesn't matter. We could consider making this some special kind
+ // of check.
+ PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize);
+ PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size);
+ PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static);
+ PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level);
+ PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline);
+ PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline);
+ PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control);
+ PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed);
+ PARSE_LANGOPT_IMPORTANT(ShortWChar, diag::warn_pch_short_wchar);
+ if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) {
+ Reader.Diag(diag::warn_pch_gc_mode)
+ << LangOpts.getGCMode() << PPLangOpts.getGCMode();
+ return true;
+ }
+ PARSE_LANGOPT_BENIGN(getVisibilityMode());
+ PARSE_LANGOPT_IMPORTANT(getStackProtectorMode(),
+ diag::warn_pch_stack_protector);
+ PARSE_LANGOPT_BENIGN(InstantiationDepth);
+ PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl);
+ PARSE_LANGOPT_BENIGN(CatchUndefined);
+ PARSE_LANGOPT_IMPORTANT(ElideConstructors, diag::warn_pch_elide_constructors);
+ PARSE_LANGOPT_BENIGN(SpellChecking);
+#undef PARSE_LANGOPT_IMPORTANT
+#undef PARSE_LANGOPT_BENIGN
+
+ return false;
+}
+
+bool PCHValidator::ReadTargetTriple(llvm::StringRef Triple) {
+ if (Triple == PP.getTargetInfo().getTriple().str())
+ return false;
+
+ Reader.Diag(diag::warn_pch_target_triple)
+ << Triple << PP.getTargetInfo().getTriple().str();
+ return true;
+}
+
+struct EmptyStringRef {
+ bool operator ()(llvm::StringRef r) const { return r.empty(); }
+};
+struct EmptyBlock {
+ bool operator ()(const PCHPredefinesBlock &r) const { return r.Data.empty(); }
+};
+
+static bool EqualConcatenations(llvm::SmallVector<llvm::StringRef, 2> L,
+ PCHPredefinesBlocks R) {
+ // First, sum up the lengths.
+ unsigned LL = 0, RL = 0;
+ for (unsigned I = 0, N = L.size(); I != N; ++I) {
+ LL += L[I].size();
+ }
+ for (unsigned I = 0, N = R.size(); I != N; ++I) {
+ RL += R[I].Data.size();
+ }
+ if (LL != RL)
+ return false;
+ if (LL == 0 && RL == 0)
+ return true;
+
+ // Kick out empty parts, they confuse the algorithm below.
+ L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end());
+ R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end());
+
+ // Do it the hard way. At this point, both vectors must be non-empty.
+ llvm::StringRef LR = L[0], RR = R[0].Data;
+ unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size();
+ (void) RN;
+ for (;;) {
+ // Compare the current pieces.
+ if (LR.size() == RR.size()) {
+ // If they're the same length, it's pretty easy.
+ if (LR != RR)
+ return false;
+ // Both pieces are done, advance.
+ ++LI;
+ ++RI;
+ // If either string is done, they're both done, since they're the same
+ // length.
+ if (LI == LN) {
+ assert(RI == RN && "Strings not the same length after all?");
+ return true;
+ }
+ LR = L[LI];
+ RR = R[RI].Data;
+ } else if (LR.size() < RR.size()) {
+ // Right piece is longer.
+ if (!RR.startswith(LR))
+ return false;
+ ++LI;
+ assert(LI != LN && "Strings not the same length after all?");
+ RR = RR.substr(LR.size());
+ LR = L[LI];
+ } else {
+ // Left piece is longer.
+ if (!LR.startswith(RR))
+ return false;
+ ++RI;
+ assert(RI != RN && "Strings not the same length after all?");
+ LR = LR.substr(RR.size());
+ RR = R[RI].Data;
+ }
+ }
+}
+
+static std::pair<FileID, llvm::StringRef::size_type>
+FindMacro(const PCHPredefinesBlocks &Buffers, llvm::StringRef MacroDef) {
+ std::pair<FileID, llvm::StringRef::size_type> Res;
+ for (unsigned I = 0, N = Buffers.size(); I != N; ++I) {
+ Res.second = Buffers[I].Data.find(MacroDef);
+ if (Res.second != llvm::StringRef::npos) {
+ Res.first = Buffers[I].BufferID;
+ break;
+ }
+ }
+ return Res;
+}
+
+bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers,
+ llvm::StringRef OriginalFileName,
+ std::string &SuggestedPredefines) {
+ // We are in the context of an implicit include, so the predefines buffer will
+ // have a #include entry for the PCH file itself (as normalized by the
+ // preprocessor initialization). Find it and skip over it in the checking
+ // below.
+ llvm::SmallString<256> PCHInclude;
+ PCHInclude += "#include \"";
+ PCHInclude += NormalizeDashIncludePath(OriginalFileName);
+ PCHInclude += "\"\n";
+ std::pair<llvm::StringRef,llvm::StringRef> Split =
+ llvm::StringRef(PP.getPredefines()).split(PCHInclude.str());
+ llvm::StringRef Left = Split.first, Right = Split.second;
+ if (Left == PP.getPredefines()) {
+ Error("Missing PCH include entry!");
+ return true;
+ }
+
+ // If the concatenation of all the PCH buffers is equal to the adjusted
+ // command line, we're done.
+ // We build a SmallVector of the command line here, because we'll eventually
+ // need to support an arbitrary amount of pieces anyway (when we have chained
+ // PCH reading).
+ llvm::SmallVector<llvm::StringRef, 2> CommandLine;
+ CommandLine.push_back(Left);
+ CommandLine.push_back(Right);
+ if (EqualConcatenations(CommandLine, Buffers))
+ return false;
+
+ SourceManager &SourceMgr = PP.getSourceManager();
+
+ // The predefines buffers are different. Determine what the differences are,
+ // and whether they require us to reject the PCH file.
+ llvm::SmallVector<llvm::StringRef, 8> PCHLines;
+ for (unsigned I = 0, N = Buffers.size(); I != N; ++I)
+ Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
+
+ llvm::SmallVector<llvm::StringRef, 8> CmdLineLines;
+ Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
+ Right.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
+
+ // Sort both sets of predefined buffer lines, since we allow some extra
+ // definitions and they may appear at any point in the output.
+ std::sort(CmdLineLines.begin(), CmdLineLines.end());
+ std::sort(PCHLines.begin(), PCHLines.end());
+
+ // Determine which predefines that were used to build the PCH file are missing
+ // from the command line.
+ std::vector<llvm::StringRef> MissingPredefines;
+ std::set_difference(PCHLines.begin(), PCHLines.end(),
+ CmdLineLines.begin(), CmdLineLines.end(),
+ std::back_inserter(MissingPredefines));
+
+ bool MissingDefines = false;
+ bool ConflictingDefines = false;
+ for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) {
+ llvm::StringRef Missing = MissingPredefines[I];
+ if (!Missing.startswith("#define ")) {
+ Reader.Diag(diag::warn_pch_compiler_options_mismatch);
+ return true;
+ }
+
+ // This is a macro definition. Determine the name of the macro we're
+ // defining.
+ std::string::size_type StartOfMacroName = strlen("#define ");
+ std::string::size_type EndOfMacroName
+ = Missing.find_first_of("( \n\r", StartOfMacroName);
+ assert(EndOfMacroName != std::string::npos &&
+ "Couldn't find the end of the macro name");
+ llvm::StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName);
+
+ // Determine whether this macro was given a different definition on the
+ // command line.
+ std::string MacroDefStart = "#define " + MacroName.str();
+ std::string::size_type MacroDefLen = MacroDefStart.size();
+ llvm::SmallVector<llvm::StringRef, 8>::iterator ConflictPos
+ = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(),
+ MacroDefStart);
+ for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) {
+ if (!ConflictPos->startswith(MacroDefStart)) {
+ // Different macro; we're done.
+ ConflictPos = CmdLineLines.end();
+ break;
+ }
+
+ assert(ConflictPos->size() > MacroDefLen &&
+ "Invalid #define in predefines buffer?");
+ if ((*ConflictPos)[MacroDefLen] != ' ' &&
+ (*ConflictPos)[MacroDefLen] != '(')
+ continue; // Longer macro name; keep trying.
+
+ // We found a conflicting macro definition.
+ break;
+ }
+
+ if (ConflictPos != CmdLineLines.end()) {
+ Reader.Diag(diag::warn_cmdline_conflicting_macro_def)
+ << MacroName;
+
+ // Show the definition of this macro within the PCH file.
+ std::pair<FileID, llvm::StringRef::size_type> MacroLoc =
+ FindMacro(Buffers, Missing);
+ assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!");
+ SourceLocation PCHMissingLoc =
+ SourceMgr.getLocForStartOfFile(MacroLoc.first)
+ .getFileLocWithOffset(MacroLoc.second);
+ Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName;
+
+ ConflictingDefines = true;
+ continue;
+ }
+
+ // If the macro doesn't conflict, then we'll just pick up the macro
+ // definition from the PCH file. Warn the user that they made a mistake.
+ if (ConflictingDefines)
+ continue; // Don't complain if there are already conflicting defs
+
+ if (!MissingDefines) {
+ Reader.Diag(diag::warn_cmdline_missing_macro_defs);
+ MissingDefines = true;
+ }
+
+ // Show the definition of this macro within the PCH file.
+ std::pair<FileID, llvm::StringRef::size_type> MacroLoc =
+ FindMacro(Buffers, Missing);
+ assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!");
+ SourceLocation PCHMissingLoc =
+ SourceMgr.getLocForStartOfFile(MacroLoc.first)
+ .getFileLocWithOffset(MacroLoc.second);
+ Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch);
+ }
+
+ if (ConflictingDefines)
+ return true;
+
+ // Determine what predefines were introduced based on command-line
+ // parameters that were not present when building the PCH
+ // file. Extra #defines are okay, so long as the identifiers being
+ // defined were not used within the precompiled header.
+ std::vector<llvm::StringRef> ExtraPredefines;
+ std::set_difference(CmdLineLines.begin(), CmdLineLines.end(),
+ PCHLines.begin(), PCHLines.end(),
+ std::back_inserter(ExtraPredefines));
+ for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) {
+ llvm::StringRef &Extra = ExtraPredefines[I];
+ if (!Extra.startswith("#define ")) {
+ Reader.Diag(diag::warn_pch_compiler_options_mismatch);
+ return true;
+ }
+
+ // This is an extra macro definition. Determine the name of the
+ // macro we're defining.
+ std::string::size_type StartOfMacroName = strlen("#define ");
+ std::string::size_type EndOfMacroName
+ = Extra.find_first_of("( \n\r", StartOfMacroName);
+ assert(EndOfMacroName != std::string::npos &&
+ "Couldn't find the end of the macro name");
+ llvm::StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName);
+
+ // Check whether this name was used somewhere in the PCH file. If
+ // so, defining it as a macro could change behavior, so we reject
+ // the PCH file.
+ if (IdentifierInfo *II = Reader.get(MacroName)) {
+ Reader.Diag(diag::warn_macro_name_used_in_pch) << II;
+ return true;
+ }
+
+ // Add this definition to the suggested predefines buffer.
+ SuggestedPredefines += Extra;
+ SuggestedPredefines += '\n';
+ }
+
+ // If we get here, it's because the predefines buffer had compatible
+ // contents. Accept the PCH file.
+ return false;
+}
+
+void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI,
+ unsigned ID) {
+ PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID);
+ ++NumHeaderInfos;
+}
+
+void PCHValidator::ReadCounter(unsigned Value) {
+ PP.setCounterValue(Value);
+}
+
+//===----------------------------------------------------------------------===//
+// PCH reader implementation
+//===----------------------------------------------------------------------===//
+
+PCHReader::PCHReader(Preprocessor &PP, ASTContext *Context,
+ const char *isysroot, bool DisableValidation)
+ : Listener(new PCHValidator(PP, *this)), DeserializationListener(0),
+ SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()),
+ Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context),
+ Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation),
+ NumStatHits(0), NumStatMisses(0), NumSLocEntriesRead(0),
+ TotalNumSLocEntries(0), NumStatementsRead(0), TotalNumStatements(0),
+ NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0),
+ NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0),
+ TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0),
+ TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0),
+ TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) {
+ RelocatablePCH = false;
+}
+
+PCHReader::PCHReader(SourceManager &SourceMgr, FileManager &FileMgr,
+ Diagnostic &Diags, const char *isysroot,
+ bool DisableValidation)
+ : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr),
+ Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0),
+ isysroot(isysroot), DisableValidation(DisableValidation), NumStatHits(0),
+ NumStatMisses(0), NumSLocEntriesRead(0), TotalNumSLocEntries(0),
+ NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0),
+ TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0),
+ NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0),
+ NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0),
+ NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0),
+ NumCurrentElementsDeserializing(0) {
+ RelocatablePCH = false;
+}
+
+PCHReader::~PCHReader() {
+ for (unsigned i = 0, e = Chain.size(); i != e; ++i)
+ delete Chain[e - i - 1];
+}
+
+PCHReader::PerFileData::PerFileData()
+ : StatCache(0), LocalNumSLocEntries(0), LocalNumTypes(0), TypeOffsets(0),
+ LocalNumDecls(0), DeclOffsets(0), LocalNumIdentifiers(0),
+ IdentifierOffsets(0), IdentifierTableData(0), IdentifierLookupTable(0),
+ LocalNumMacroDefinitions(0), MacroDefinitionOffsets(0),
+ NumPreallocatedPreprocessingEntities(0), SelectorLookupTable(0),
+ SelectorLookupTableData(0), SelectorOffsets(0), LocalNumSelectors(0)
+{}
+
+void
+PCHReader::setDeserializationListener(PCHDeserializationListener *Listener) {
+ DeserializationListener = Listener;
+ if (DeserializationListener)
+ DeserializationListener->SetReader(this);
+}
+
+
+namespace {
+class PCHSelectorLookupTrait {
+ PCHReader &Reader;
+
+public:
+ struct data_type {
+ pch::SelectorID ID;
+ ObjCMethodList Instance, Factory;
+ };
+
+ typedef Selector external_key_type;
+ typedef external_key_type internal_key_type;
+
+ explicit PCHSelectorLookupTrait(PCHReader &Reader) : Reader(Reader) { }
+
+ static bool EqualKey(const internal_key_type& a,
+ const internal_key_type& b) {
+ return a == b;
+ }
+
+ static unsigned ComputeHash(Selector Sel) {
+ unsigned N = Sel.getNumArgs();
+ if (N == 0)
+ ++N;
+ unsigned R = 5381;
+ for (unsigned I = 0; I != N; ++I)
+ if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
+ R = llvm::HashString(II->getName(), R);
+ return R;
+ }
+
+ // This hopefully will just get inlined and removed by the optimizer.
+ static const internal_key_type&
+ GetInternalKey(const external_key_type& x) { return x; }
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d) {
+ using namespace clang::io;
+ unsigned KeyLen = ReadUnalignedLE16(d);
+ unsigned DataLen = ReadUnalignedLE16(d);
+ return std::make_pair(KeyLen, DataLen);
+ }
+
+ internal_key_type ReadKey(const unsigned char* d, unsigned) {
+ using namespace clang::io;
+ SelectorTable &SelTable = Reader.getContext()->Selectors;
+ unsigned N = ReadUnalignedLE16(d);
+ IdentifierInfo *FirstII
+ = Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d));
+ if (N == 0)
+ return SelTable.getNullarySelector(FirstII);
+ else if (N == 1)
+ return SelTable.getUnarySelector(FirstII);
+
+ llvm::SmallVector<IdentifierInfo *, 16> Args;
+ Args.push_back(FirstII);
+ for (unsigned I = 1; I != N; ++I)
+ Args.push_back(Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)));
+
+ return SelTable.getSelector(N, Args.data());
+ }
+
+ data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) {
+ using namespace clang::io;
+
+ data_type Result;
+
+ Result.ID = ReadUnalignedLE32(d);
+ unsigned NumInstanceMethods = ReadUnalignedLE16(d);
+ unsigned NumFactoryMethods = ReadUnalignedLE16(d);
+
+ // Load instance methods
+ ObjCMethodList *Prev = 0;
+ for (unsigned I = 0; I != NumInstanceMethods; ++I) {
+ ObjCMethodDecl *Method
+ = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));
+ if (!Result.Instance.Method) {
+ // This is the first method, which is the easy case.
+ Result.Instance.Method = Method;
+ Prev = &Result.Instance;
+ continue;
+ }
+
+ ObjCMethodList *Mem =
+ Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>();
+ Prev->Next = new (Mem) ObjCMethodList(Method, 0);
+ Prev = Prev->Next;
+ }
+
+ // Load factory methods
+ Prev = 0;
+ for (unsigned I = 0; I != NumFactoryMethods; ++I) {
+ ObjCMethodDecl *Method
+ = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d)));
+ if (!Result.Factory.Method) {
+ // This is the first method, which is the easy case.
+ Result.Factory.Method = Method;
+ Prev = &Result.Factory;
+ continue;
+ }
+
+ ObjCMethodList *Mem =
+ Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>();
+ Prev->Next = new (Mem) ObjCMethodList(Method, 0);
+ Prev = Prev->Next;
+ }
+
+ return Result;
+ }
+};
+
+} // end anonymous namespace
+
+/// \brief The on-disk hash table used for the global method pool.
+typedef OnDiskChainedHashTable<PCHSelectorLookupTrait>
+ PCHSelectorLookupTable;
+
+namespace {
+class PCHIdentifierLookupTrait {
+ PCHReader &Reader;
+ llvm::BitstreamCursor &Stream;
+
+ // If we know the IdentifierInfo in advance, it is here and we will
+ // not build a new one. Used when deserializing information about an
+ // identifier that was constructed before the PCH file was read.
+ IdentifierInfo *KnownII;
+
+public:
+ typedef IdentifierInfo * data_type;
+
+ typedef const std::pair<const char*, unsigned> external_key_type;
+
+ typedef external_key_type internal_key_type;
+
+ PCHIdentifierLookupTrait(PCHReader &Reader, llvm::BitstreamCursor &Stream,
+ IdentifierInfo *II = 0)
+ : Reader(Reader), Stream(Stream), KnownII(II) { }
+
+ static bool EqualKey(const internal_key_type& a,
+ const internal_key_type& b) {
+ return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0
+ : false;
+ }
+
+ static unsigned ComputeHash(const internal_key_type& a) {
+ return llvm::HashString(llvm::StringRef(a.first, a.second));
+ }
+
+ // This hopefully will just get inlined and removed by the optimizer.
+ static const internal_key_type&
+ GetInternalKey(const external_key_type& x) { return x; }
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d) {
+ using namespace clang::io;
+ unsigned DataLen = ReadUnalignedLE16(d);
+ unsigned KeyLen = ReadUnalignedLE16(d);
+ return std::make_pair(KeyLen, DataLen);
+ }
+
+ static std::pair<const char*, unsigned>
+ ReadKey(const unsigned char* d, unsigned n) {
+ assert(n >= 2 && d[n-1] == '\0');
+ return std::make_pair((const char*) d, n-1);
+ }
+
+ IdentifierInfo *ReadData(const internal_key_type& k,
+ const unsigned char* d,
+ unsigned DataLen) {
+ using namespace clang::io;
+ pch::IdentID ID = ReadUnalignedLE32(d);
+ bool IsInteresting = ID & 0x01;
+
+ // Wipe out the "is interesting" bit.
+ ID = ID >> 1;
+
+ if (!IsInteresting) {
+ // For uninteresting identifiers, just build the IdentifierInfo
+ // and associate it with the persistent ID.
+ IdentifierInfo *II = KnownII;
+ if (!II)
+ II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second);
+ Reader.SetIdentifierInfo(ID, II);
+ II->setIsFromPCH();
+ return II;
+ }
+
+ unsigned Bits = ReadUnalignedLE16(d);
+ bool CPlusPlusOperatorKeyword = Bits & 0x01;
+ Bits >>= 1;
+ bool HasRevertedTokenIDToIdentifier = Bits & 0x01;
+ Bits >>= 1;
+ bool Poisoned = Bits & 0x01;
+ Bits >>= 1;
+ bool ExtensionToken = Bits & 0x01;
+ Bits >>= 1;
+ bool hasMacroDefinition = Bits & 0x01;
+ Bits >>= 1;
+ unsigned ObjCOrBuiltinID = Bits & 0x3FF;
+ Bits >>= 10;
+
+ assert(Bits == 0 && "Extra bits in the identifier?");
+ DataLen -= 6;
+
+ // Build the IdentifierInfo itself and link the identifier ID with
+ // the new IdentifierInfo.
+ IdentifierInfo *II = KnownII;
+ if (!II)
+ II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second);
+ Reader.SetIdentifierInfo(ID, II);
+
+ // Set or check the various bits in the IdentifierInfo structure.
+ // Token IDs are read-only.
+ if (HasRevertedTokenIDToIdentifier)
+ II->RevertTokenIDToIdentifier();
+ II->setObjCOrBuiltinID(ObjCOrBuiltinID);
+ assert(II->isExtensionToken() == ExtensionToken &&
+ "Incorrect extension token flag");
+ (void)ExtensionToken;
+ II->setIsPoisoned(Poisoned);
+ assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&
+ "Incorrect C++ operator keyword flag");
+ (void)CPlusPlusOperatorKeyword;
+
+ // If this identifier is a macro, deserialize the macro
+ // definition.
+ if (hasMacroDefinition) {
+ uint32_t Offset = ReadUnalignedLE32(d);
+ Reader.ReadMacroRecord(Stream, Offset);
+ DataLen -= 4;
+ }
+
+ // Read all of the declarations visible at global scope with this
+ // name.
+ if (Reader.getContext() == 0) return II;
+ if (DataLen > 0) {
+ llvm::SmallVector<uint32_t, 4> DeclIDs;
+ for (; DataLen > 0; DataLen -= 4)
+ DeclIDs.push_back(ReadUnalignedLE32(d));
+ Reader.SetGloballyVisibleDecls(II, DeclIDs);
+ }
+
+ II->setIsFromPCH();
+ return II;
+ }
+};
+
+} // end anonymous namespace
+
+/// \brief The on-disk hash table used to contain information about
+/// all of the identifiers in the program.
+typedef OnDiskChainedHashTable<PCHIdentifierLookupTrait>
+ PCHIdentifierLookupTable;
+
+void PCHReader::Error(const char *Msg) {
+ Diag(diag::err_fe_pch_malformed) << Msg;
+}
+
+/// \brief Check the contents of the concatenation of all predefines buffers in
+/// the PCH chain against the contents of the predefines buffer of the current
+/// compiler invocation.
+///
+/// The contents should be the same. If not, then some command-line option
+/// changed the preprocessor state and we must probably reject the PCH file.
+///
+/// \returns true if there was a mismatch (in which case the PCH file
+/// should be ignored), or false otherwise.
+bool PCHReader::CheckPredefinesBuffers() {
+ if (Listener)
+ return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers,
+ ActualOriginalFileName,
+ SuggestedPredefines);
+ return false;
+}
+
+//===----------------------------------------------------------------------===//
+// Source Manager Deserialization
+//===----------------------------------------------------------------------===//
+
+/// \brief Read the line table in the source manager block.
+/// \returns true if ther was an error.
+bool PCHReader::ParseLineTable(llvm::SmallVectorImpl<uint64_t> &Record) {
+ unsigned Idx = 0;
+ LineTableInfo &LineTable = SourceMgr.getLineTable();
+
+ // Parse the file names
+ std::map<int, int> FileIDs;
+ for (int I = 0, N = Record[Idx++]; I != N; ++I) {
+ // Extract the file name
+ unsigned FilenameLen = Record[Idx++];
+ std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen);
+ Idx += FilenameLen;
+ MaybeAddSystemRootToFilename(Filename);
+ FileIDs[I] = LineTable.getLineTableFilenameID(Filename.c_str(),
+ Filename.size());
+ }
+
+ // Parse the line entries
+ std::vector<LineEntry> Entries;
+ while (Idx < Record.size()) {
+ int FID = Record[Idx++];
+
+ // Extract the line entries
+ unsigned NumEntries = Record[Idx++];
+ assert(NumEntries && "Numentries is 00000");
+ Entries.clear();
+ Entries.reserve(NumEntries);
+ for (unsigned I = 0; I != NumEntries; ++I) {
+ unsigned FileOffset = Record[Idx++];
+ unsigned LineNo = Record[Idx++];
+ int FilenameID = FileIDs[Record[Idx++]];
+ SrcMgr::CharacteristicKind FileKind
+ = (SrcMgr::CharacteristicKind)Record[Idx++];
+ unsigned IncludeOffset = Record[Idx++];
+ Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
+ FileKind, IncludeOffset));
+ }
+ LineTable.AddEntry(FID, Entries);
+ }
+
+ return false;
+}
+
+namespace {
+
+class PCHStatData {
+public:
+ const bool hasStat;
+ const ino_t ino;
+ const dev_t dev;
+ const mode_t mode;
+ const time_t mtime;
+ const off_t size;
+
+ PCHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s)
+ : hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {}
+
+ PCHStatData()
+ : hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {}
+};
+
+class PCHStatLookupTrait {
+ public:
+ typedef const char *external_key_type;
+ typedef const char *internal_key_type;
+
+ typedef PCHStatData data_type;
+
+ static unsigned ComputeHash(const char *path) {
+ return llvm::HashString(path);
+ }
+
+ static internal_key_type GetInternalKey(const char *path) { return path; }
+
+ static bool EqualKey(internal_key_type a, internal_key_type b) {
+ return strcmp(a, b) == 0;
+ }
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d) {
+ unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d);
+ unsigned DataLen = (unsigned) *d++;
+ return std::make_pair(KeyLen + 1, DataLen);
+ }
+
+ static internal_key_type ReadKey(const unsigned char *d, unsigned) {
+ return (const char *)d;
+ }
+
+ static data_type ReadData(const internal_key_type, const unsigned char *d,
+ unsigned /*DataLen*/) {
+ using namespace clang::io;
+
+ if (*d++ == 1)
+ return data_type();
+
+ ino_t ino = (ino_t) ReadUnalignedLE32(d);
+ dev_t dev = (dev_t) ReadUnalignedLE32(d);
+ mode_t mode = (mode_t) ReadUnalignedLE16(d);
+ time_t mtime = (time_t) ReadUnalignedLE64(d);
+ off_t size = (off_t) ReadUnalignedLE64(d);
+ return data_type(ino, dev, mode, mtime, size);
+ }
+};
+
+/// \brief stat() cache for precompiled headers.
+///
+/// This cache is very similar to the stat cache used by pretokenized
+/// headers.
+class PCHStatCache : public StatSysCallCache {
+ typedef OnDiskChainedHashTable<PCHStatLookupTrait> CacheTy;
+ CacheTy *Cache;
+
+ unsigned &NumStatHits, &NumStatMisses;
+public:
+ PCHStatCache(const unsigned char *Buckets,
+ const unsigned char *Base,
+ unsigned &NumStatHits,
+ unsigned &NumStatMisses)
+ : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) {
+ Cache = CacheTy::Create(Buckets, Base);
+ }
+
+ ~PCHStatCache() { delete Cache; }
+
+ int stat(const char *path, struct stat *buf) {
+ // Do the lookup for the file's data in the PCH file.
+ CacheTy::iterator I = Cache->find(path);
+
+ // If we don't get a hit in the PCH file just forward to 'stat'.
+ if (I == Cache->end()) {
+ ++NumStatMisses;
+ return StatSysCallCache::stat(path, buf);
+ }
+
+ ++NumStatHits;
+ PCHStatData Data = *I;
+
+ if (!Data.hasStat)
+ return 1;
+
+ buf->st_ino = Data.ino;
+ buf->st_dev = Data.dev;
+ buf->st_mtime = Data.mtime;
+ buf->st_mode = Data.mode;
+ buf->st_size = Data.size;
+ return 0;
+ }
+};
+} // end anonymous namespace
+
+
+/// \brief Read a source manager block
+PCHReader::PCHReadResult PCHReader::ReadSourceManagerBlock(PerFileData &F) {
+ using namespace SrcMgr;
+
+ llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
+
+ // Set the source-location entry cursor to the current position in
+ // the stream. This cursor will be used to read the contents of the
+ // source manager block initially, and then lazily read
+ // source-location entries as needed.
+ SLocEntryCursor = F.Stream;
+
+ // The stream itself is going to skip over the source manager block.
+ if (F.Stream.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+
+ // Enter the source manager block.
+ if (SLocEntryCursor.EnterSubBlock(pch::SOURCE_MANAGER_BLOCK_ID)) {
+ Error("malformed source manager block record in PCH file");
+ return Failure;
+ }
+
+ RecordData Record;
+ while (true) {
+ unsigned Code = SLocEntryCursor.ReadCode();
+ if (Code == llvm::bitc::END_BLOCK) {
+ if (SLocEntryCursor.ReadBlockEnd()) {
+ Error("error at end of Source Manager block in PCH file");
+ return Failure;
+ }
+ return Success;
+ }
+
+ if (Code == llvm::bitc::ENTER_SUBBLOCK) {
+ // No known subblocks, always skip them.
+ SLocEntryCursor.ReadSubBlockID();
+ if (SLocEntryCursor.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+ continue;
+ }
+
+ if (Code == llvm::bitc::DEFINE_ABBREV) {
+ SLocEntryCursor.ReadAbbrevRecord();
+ continue;
+ }
+
+ // Read a record.
+ const char *BlobStart;
+ unsigned BlobLen;
+ Record.clear();
+ switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) {
+ default: // Default behavior: ignore.
+ break;
+
+ case pch::SM_LINE_TABLE:
+ if (ParseLineTable(Record))
+ return Failure;
+ break;
+
+ case pch::SM_SLOC_FILE_ENTRY:
+ case pch::SM_SLOC_BUFFER_ENTRY:
+ case pch::SM_SLOC_INSTANTIATION_ENTRY:
+ // Once we hit one of the source location entries, we're done.
+ return Success;
+ }
+ }
+}
+
+/// \brief Get a cursor that's correctly positioned for reading the source
+/// location entry with the given ID.
+llvm::BitstreamCursor &PCHReader::SLocCursorForID(unsigned ID) {
+ assert(ID != 0 && ID <= TotalNumSLocEntries &&
+ "SLocCursorForID should only be called for real IDs.");
+
+ ID -= 1;
+ PerFileData *F = 0;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ F = Chain[N - I - 1];
+ if (ID < F->LocalNumSLocEntries)
+ break;
+ ID -= F->LocalNumSLocEntries;
+ }
+ assert(F && F->LocalNumSLocEntries > ID && "Chain corrupted");
+
+ F->SLocEntryCursor.JumpToBit(F->SLocOffsets[ID]);
+ return F->SLocEntryCursor;
+}
+
+/// \brief Read in the source location entry with the given ID.
+PCHReader::PCHReadResult PCHReader::ReadSLocEntryRecord(unsigned ID) {
+ if (ID == 0)
+ return Success;
+
+ if (ID > TotalNumSLocEntries) {
+ Error("source location entry ID out-of-range for PCH file");
+ return Failure;
+ }
+
+ llvm::BitstreamCursor &SLocEntryCursor = SLocCursorForID(ID);
+
+ ++NumSLocEntriesRead;
+ unsigned Code = SLocEntryCursor.ReadCode();
+ if (Code == llvm::bitc::END_BLOCK ||
+ Code == llvm::bitc::ENTER_SUBBLOCK ||
+ Code == llvm::bitc::DEFINE_ABBREV) {
+ Error("incorrectly-formatted source location entry in PCH file");
+ return Failure;
+ }
+
+ RecordData Record;
+ const char *BlobStart;
+ unsigned BlobLen;
+ switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) {
+ default:
+ Error("incorrectly-formatted source location entry in PCH file");
+ return Failure;
+
+ case pch::SM_SLOC_FILE_ENTRY: {
+ std::string Filename(BlobStart, BlobStart + BlobLen);
+ MaybeAddSystemRootToFilename(Filename);
+ const FileEntry *File = FileMgr.getFile(Filename);
+ if (File == 0) {
+ std::string ErrorStr = "could not find file '";
+ ErrorStr += Filename;
+ ErrorStr += "' referenced by PCH file";
+ Error(ErrorStr.c_str());
+ return Failure;
+ }
+
+ if (Record.size() < 10) {
+ Error("source location entry is incorrect");
+ return Failure;
+ }
+
+ if (!DisableValidation &&
+ ((off_t)Record[4] != File->getSize()
+#if !defined(LLVM_ON_WIN32)
+ // In our regression testing, the Windows file system seems to
+ // have inconsistent modification times that sometimes
+ // erroneously trigger this error-handling path.
+ || (time_t)Record[5] != File->getModificationTime()
+#endif
+ )) {
+ Diag(diag::err_fe_pch_file_modified)
+ << Filename;
+ return Failure;
+ }
+
+ FileID FID = SourceMgr.createFileID(File,
+ SourceLocation::getFromRawEncoding(Record[1]),
+ (SrcMgr::CharacteristicKind)Record[2],
+ ID, Record[0]);
+ if (Record[3])
+ const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile())
+ .setHasLineDirectives();
+
+ // Reconstruct header-search information for this file.
+ HeaderFileInfo HFI;
+ HFI.isImport = Record[6];
+ HFI.DirInfo = Record[7];
+ HFI.NumIncludes = Record[8];
+ HFI.ControllingMacroID = Record[9];
+ if (Listener)
+ Listener->ReadHeaderFileInfo(HFI, File->getUID());
+ break;
+ }
+
+ case pch::SM_SLOC_BUFFER_ENTRY: {
+ const char *Name = BlobStart;
+ unsigned Offset = Record[0];
+ unsigned Code = SLocEntryCursor.ReadCode();
+ Record.clear();
+ unsigned RecCode
+ = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen);
+
+ if (RecCode != pch::SM_SLOC_BUFFER_BLOB) {
+ Error("PCH record has invalid code");
+ return Failure;
+ }
+
+ llvm::MemoryBuffer *Buffer
+ = llvm::MemoryBuffer::getMemBuffer(llvm::StringRef(BlobStart, BlobLen - 1),
+ Name);
+ FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, Offset);
+
+ if (strcmp(Name, "<built-in>") == 0) {
+ PCHPredefinesBlock Block = {
+ BufferID,
+ llvm::StringRef(BlobStart, BlobLen - 1)
+ };
+ PCHPredefinesBuffers.push_back(Block);
+ }
+
+ break;
+ }
+
+ case pch::SM_SLOC_INSTANTIATION_ENTRY: {
+ SourceLocation SpellingLoc
+ = SourceLocation::getFromRawEncoding(Record[1]);
+ SourceMgr.createInstantiationLoc(SpellingLoc,
+ SourceLocation::getFromRawEncoding(Record[2]),
+ SourceLocation::getFromRawEncoding(Record[3]),
+ Record[4],
+ ID,
+ Record[0]);
+ break;
+ }
+ }
+
+ return Success;
+}
+
+/// 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 PCHReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor,
+ unsigned BlockID) {
+ if (Cursor.EnterSubBlock(BlockID)) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+
+ while (true) {
+ unsigned Code = Cursor.ReadCode();
+
+ // We expect all abbrevs to be at the start of the block.
+ if (Code != llvm::bitc::DEFINE_ABBREV)
+ return false;
+ Cursor.ReadAbbrevRecord();
+ }
+}
+
+void PCHReader::ReadMacroRecord(llvm::BitstreamCursor &Stream, uint64_t Offset){
+ assert(PP && "Forgot to set Preprocessor ?");
+
+ // Keep track of where we are in the stream, then jump back there
+ // after reading this macro.
+ SavedStreamPosition SavedPosition(Stream);
+
+ Stream.JumpToBit(Offset);
+ RecordData Record;
+ llvm::SmallVector<IdentifierInfo*, 16> MacroArgs;
+ MacroInfo *Macro = 0;
+
+ while (true) {
+ unsigned Code = Stream.ReadCode();
+ switch (Code) {
+ case llvm::bitc::END_BLOCK:
+ return;
+
+ case llvm::bitc::ENTER_SUBBLOCK:
+ // No known subblocks, always skip them.
+ Stream.ReadSubBlockID();
+ if (Stream.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return;
+ }
+ continue;
+
+ case llvm::bitc::DEFINE_ABBREV:
+ Stream.ReadAbbrevRecord();
+ continue;
+ default: break;
+ }
+
+ // Read a record.
+ Record.clear();
+ pch::PreprocessorRecordTypes RecType =
+ (pch::PreprocessorRecordTypes)Stream.ReadRecord(Code, Record);
+ switch (RecType) {
+ case pch::PP_MACRO_OBJECT_LIKE:
+ case pch::PP_MACRO_FUNCTION_LIKE: {
+ // If we already have a macro, that means that we've hit the end
+ // of the definition of the macro we were looking for. We're
+ // done.
+ if (Macro)
+ return;
+
+ IdentifierInfo *II = DecodeIdentifierInfo(Record[0]);
+ if (II == 0) {
+ Error("macro must have a name in PCH file");
+ return;
+ }
+ SourceLocation Loc = SourceLocation::getFromRawEncoding(Record[1]);
+ bool isUsed = Record[2];
+
+ MacroInfo *MI = PP->AllocateMacroInfo(Loc);
+ MI->setIsUsed(isUsed);
+ MI->setIsFromPCH();
+
+ unsigned NextIndex = 3;
+ if (RecType == pch::PP_MACRO_FUNCTION_LIKE) {
+ // Decode function-like macro info.
+ bool isC99VarArgs = Record[3];
+ bool isGNUVarArgs = Record[4];
+ MacroArgs.clear();
+ unsigned NumArgs = Record[5];
+ NextIndex = 6 + NumArgs;
+ for (unsigned i = 0; i != NumArgs; ++i)
+ MacroArgs.push_back(DecodeIdentifierInfo(Record[6+i]));
+
+ // Install function-like macro info.
+ MI->setIsFunctionLike();
+ if (isC99VarArgs) MI->setIsC99Varargs();
+ if (isGNUVarArgs) MI->setIsGNUVarargs();
+ MI->setArgumentList(MacroArgs.data(), MacroArgs.size(),
+ PP->getPreprocessorAllocator());
+ }
+
+ // Finally, install the macro.
+ PP->setMacroInfo(II, MI);
+
+ // Remember that we saw this macro last so that we add the tokens that
+ // form its body to it.
+ Macro = MI;
+
+ if (NextIndex + 1 == Record.size() && PP->getPreprocessingRecord()) {
+ // We have a macro definition. Load it now.
+ PP->getPreprocessingRecord()->RegisterMacroDefinition(Macro,
+ getMacroDefinition(Record[NextIndex]));
+ }
+
+ ++NumMacrosRead;
+ break;
+ }
+
+ case pch::PP_TOKEN: {
+ // If we see a TOKEN before a PP_MACRO_*, then the file is
+ // erroneous, just pretend we didn't see this.
+ if (Macro == 0) break;
+
+ Token Tok;
+ Tok.startToken();
+ Tok.setLocation(SourceLocation::getFromRawEncoding(Record[0]));
+ Tok.setLength(Record[1]);
+ if (IdentifierInfo *II = DecodeIdentifierInfo(Record[2]))
+ Tok.setIdentifierInfo(II);
+ Tok.setKind((tok::TokenKind)Record[3]);
+ Tok.setFlag((Token::TokenFlags)Record[4]);
+ Macro->AddTokenToBody(Tok);
+ break;
+ }
+
+ case pch::PP_MACRO_INSTANTIATION: {
+ // If we already have a macro, that means that we've hit the end
+ // of the definition of the macro we were looking for. We're
+ // done.
+ if (Macro)
+ return;
+
+ if (!PP->getPreprocessingRecord()) {
+ Error("missing preprocessing record in PCH file");
+ return;
+ }
+
+ PreprocessingRecord &PPRec = *PP->getPreprocessingRecord();
+ if (PPRec.getPreprocessedEntity(Record[0]))
+ return;
+
+ MacroInstantiation *MI
+ = new (PPRec) MacroInstantiation(DecodeIdentifierInfo(Record[3]),
+ SourceRange(
+ SourceLocation::getFromRawEncoding(Record[1]),
+ SourceLocation::getFromRawEncoding(Record[2])),
+ getMacroDefinition(Record[4]));
+ PPRec.SetPreallocatedEntity(Record[0], MI);
+ return;
+ }
+
+ case pch::PP_MACRO_DEFINITION: {
+ // If we already have a macro, that means that we've hit the end
+ // of the definition of the macro we were looking for. We're
+ // done.
+ if (Macro)
+ return;
+
+ if (!PP->getPreprocessingRecord()) {
+ Error("missing preprocessing record in PCH file");
+ return;
+ }
+
+ PreprocessingRecord &PPRec = *PP->getPreprocessingRecord();
+ if (PPRec.getPreprocessedEntity(Record[0]))
+ return;
+
+ if (Record[1] >= MacroDefinitionsLoaded.size()) {
+ Error("out-of-bounds macro definition record");
+ return;
+ }
+
+ MacroDefinition *MD
+ = new (PPRec) MacroDefinition(DecodeIdentifierInfo(Record[4]),
+ SourceLocation::getFromRawEncoding(Record[5]),
+ SourceRange(
+ SourceLocation::getFromRawEncoding(Record[2]),
+ SourceLocation::getFromRawEncoding(Record[3])));
+ PPRec.SetPreallocatedEntity(Record[0], MD);
+ MacroDefinitionsLoaded[Record[1]] = MD;
+ return;
+ }
+ }
+ }
+}
+
+void PCHReader::ReadDefinedMacros() {
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ llvm::BitstreamCursor &MacroCursor = Chain[N - I - 1]->MacroCursor;
+
+ // If there was no preprocessor block, skip this file.
+ if (!MacroCursor.getBitStreamReader())
+ continue;
+
+ llvm::BitstreamCursor Cursor = MacroCursor;
+ if (Cursor.EnterSubBlock(pch::PREPROCESSOR_BLOCK_ID)) {
+ Error("malformed preprocessor block record in PCH file");
+ return;
+ }
+
+ RecordData Record;
+ while (true) {
+ unsigned Code = Cursor.ReadCode();
+ if (Code == llvm::bitc::END_BLOCK) {
+ if (Cursor.ReadBlockEnd()) {
+ Error("error at end of preprocessor block in PCH file");
+ return;
+ }
+ break;
+ }
+
+ if (Code == llvm::bitc::ENTER_SUBBLOCK) {
+ // No known subblocks, always skip them.
+ Cursor.ReadSubBlockID();
+ if (Cursor.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return;
+ }
+ continue;
+ }
+
+ if (Code == llvm::bitc::DEFINE_ABBREV) {
+ Cursor.ReadAbbrevRecord();
+ continue;
+ }
+
+ // Read a record.
+ const char *BlobStart;
+ unsigned BlobLen;
+ Record.clear();
+ switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) {
+ default: // Default behavior: ignore.
+ break;
+
+ case pch::PP_MACRO_OBJECT_LIKE:
+ case pch::PP_MACRO_FUNCTION_LIKE:
+ DecodeIdentifierInfo(Record[0]);
+ break;
+
+ case pch::PP_TOKEN:
+ // Ignore tokens.
+ break;
+
+ case pch::PP_MACRO_INSTANTIATION:
+ case pch::PP_MACRO_DEFINITION:
+ // Read the macro record.
+ ReadMacroRecord(Chain[N - I - 1]->Stream, Cursor.GetCurrentBitNo());
+ break;
+ }
+ }
+ }
+}
+
+MacroDefinition *PCHReader::getMacroDefinition(pch::IdentID ID) {
+ if (ID == 0 || ID >= MacroDefinitionsLoaded.size())
+ return 0;
+
+ if (!MacroDefinitionsLoaded[ID]) {
+ unsigned Index = ID;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PerFileData &F = *Chain[N - I - 1];
+ if (Index < F.LocalNumMacroDefinitions) {
+ ReadMacroRecord(F.Stream, F.MacroDefinitionOffsets[Index]);
+ break;
+ }
+ Index -= F.LocalNumMacroDefinitions;
+ }
+ assert(MacroDefinitionsLoaded[ID] && "Broken chain");
+ }
+
+ return MacroDefinitionsLoaded[ID];
+}
+
+/// \brief If we are loading a relocatable PCH file, and the filename is
+/// not an absolute path, add the system root to the beginning of the file
+/// name.
+void PCHReader::MaybeAddSystemRootToFilename(std::string &Filename) {
+ // If this is not a relocatable PCH file, there's nothing to do.
+ if (!RelocatablePCH)
+ return;
+
+ if (Filename.empty() || llvm::sys::Path(Filename).isAbsolute())
+ return;
+
+ if (isysroot == 0) {
+ // If no system root was given, default to '/'
+ Filename.insert(Filename.begin(), '/');
+ return;
+ }
+
+ unsigned Length = strlen(isysroot);
+ if (isysroot[Length - 1] != '/')
+ Filename.insert(Filename.begin(), '/');
+
+ Filename.insert(Filename.begin(), isysroot, isysroot + Length);
+}
+
+PCHReader::PCHReadResult
+PCHReader::ReadPCHBlock(PerFileData &F) {
+ llvm::BitstreamCursor &Stream = F.Stream;
+
+ if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+
+ // Read all of the records and blocks for the PCH file.
+ RecordData Record;
+ bool First = true;
+ while (!Stream.AtEndOfStream()) {
+ unsigned Code = Stream.ReadCode();
+ if (Code == llvm::bitc::END_BLOCK) {
+ if (Stream.ReadBlockEnd()) {
+ Error("error at end of module block in PCH file");
+ return Failure;
+ }
+
+ return Success;
+ }
+
+ if (Code == llvm::bitc::ENTER_SUBBLOCK) {
+ switch (Stream.ReadSubBlockID()) {
+ case pch::DECLTYPES_BLOCK_ID:
+ // We lazily load the decls block, but we want to set up the
+ // DeclsCursor cursor to point into it. Clone our current bitcode
+ // cursor to it, enter the block and read the abbrevs in that block.
+ // With the main cursor, we just skip over it.
+ F.DeclsCursor = Stream;
+ if (Stream.SkipBlock() || // Skip with the main cursor.
+ // Read the abbrevs.
+ ReadBlockAbbrevs(F.DeclsCursor, pch::DECLTYPES_BLOCK_ID)) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+ break;
+
+ case pch::PREPROCESSOR_BLOCK_ID:
+ F.MacroCursor = Stream;
+ if (PP)
+ PP->setExternalSource(this);
+
+ if (Stream.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+ break;
+
+ case pch::SOURCE_MANAGER_BLOCK_ID:
+ switch (ReadSourceManagerBlock(F)) {
+ case Success:
+ break;
+
+ case Failure:
+ Error("malformed source manager block in PCH file");
+ return Failure;
+
+ case IgnorePCH:
+ return IgnorePCH;
+ }
+ break;
+ }
+ First = false;
+ continue;
+ }
+
+ if (Code == llvm::bitc::DEFINE_ABBREV) {
+ Stream.ReadAbbrevRecord();
+ continue;
+ }
+
+ // Read and process a record.
+ Record.clear();
+ const char *BlobStart = 0;
+ unsigned BlobLen = 0;
+ switch ((pch::PCHRecordTypes)Stream.ReadRecord(Code, Record,
+ &BlobStart, &BlobLen)) {
+ default: // Default behavior: ignore.
+ break;
+
+ case pch::METADATA: {
+ if (Record[0] != pch::VERSION_MAJOR && !DisableValidation) {
+ Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old
+ : diag::warn_pch_version_too_new);
+ return IgnorePCH;
+ }
+
+ RelocatablePCH = Record[4];
+ if (Listener) {
+ std::string TargetTriple(BlobStart, BlobLen);
+ if (Listener->ReadTargetTriple(TargetTriple))
+ return IgnorePCH;
+ }
+ break;
+ }
+
+ case pch::CHAINED_METADATA: {
+ if (!First) {
+ Error("CHAINED_METADATA is not first record in block");
+ return Failure;
+ }
+ if (Record[0] != pch::VERSION_MAJOR && !DisableValidation) {
+ Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old
+ : diag::warn_pch_version_too_new);
+ return IgnorePCH;
+ }
+
+ // Load the chained file.
+ switch(ReadPCHCore(llvm::StringRef(BlobStart, BlobLen))) {
+ case Failure: return Failure;
+ // If we have to ignore the dependency, we'll have to ignore this too.
+ case IgnorePCH: return IgnorePCH;
+ case Success: break;
+ }
+ break;
+ }
+
+ case pch::TYPE_OFFSET:
+ if (F.LocalNumTypes != 0) {
+ Error("duplicate TYPE_OFFSET record in PCH file");
+ return Failure;
+ }
+ F.TypeOffsets = (const uint32_t *)BlobStart;
+ F.LocalNumTypes = Record[0];
+ break;
+
+ case pch::DECL_OFFSET:
+ if (F.LocalNumDecls != 0) {
+ Error("duplicate DECL_OFFSET record in PCH file");
+ return Failure;
+ }
+ F.DeclOffsets = (const uint32_t *)BlobStart;
+ F.LocalNumDecls = Record[0];
+ break;
+
+ case pch::TU_UPDATE_LEXICAL: {
+ DeclContextInfo Info = {
+ /* No visible information */ 0, 0,
+ reinterpret_cast<const pch::DeclID *>(BlobStart),
+ BlobLen / sizeof(pch::DeclID)
+ };
+ DeclContextOffsets[Context->getTranslationUnitDecl()].push_back(Info);
+ break;
+ }
+
+ case pch::REDECLS_UPDATE_LATEST: {
+ assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs");
+ for (unsigned i = 0, e = Record.size(); i < e; i += 2) {
+ pch::DeclID First = Record[i], Latest = Record[i+1];
+ assert((FirstLatestDeclIDs.find(First) == FirstLatestDeclIDs.end() ||
+ Latest > FirstLatestDeclIDs[First]) &&
+ "The new latest is supposed to come after the previous latest");
+ FirstLatestDeclIDs[First] = Latest;
+ }
+ break;
+ }
+
+ case pch::LANGUAGE_OPTIONS:
+ if (ParseLanguageOptions(Record) && !DisableValidation)
+ return IgnorePCH;
+ break;
+
+ case pch::IDENTIFIER_TABLE:
+ F.IdentifierTableData = BlobStart;
+ if (Record[0]) {
+ F.IdentifierLookupTable
+ = PCHIdentifierLookupTable::Create(
+ (const unsigned char *)F.IdentifierTableData + Record[0],
+ (const unsigned char *)F.IdentifierTableData,
+ PCHIdentifierLookupTrait(*this, F.Stream));
+ if (PP)
+ PP->getIdentifierTable().setExternalIdentifierLookup(this);
+ }
+ break;
+
+ case pch::IDENTIFIER_OFFSET:
+ if (F.LocalNumIdentifiers != 0) {
+ Error("duplicate IDENTIFIER_OFFSET record in PCH file");
+ return Failure;
+ }
+ F.IdentifierOffsets = (const uint32_t *)BlobStart;
+ F.LocalNumIdentifiers = Record[0];
+ break;
+
+ case pch::EXTERNAL_DEFINITIONS:
+ // Optimization for the first block.
+ if (ExternalDefinitions.empty())
+ ExternalDefinitions.swap(Record);
+ else
+ ExternalDefinitions.insert(ExternalDefinitions.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::SPECIAL_TYPES:
+ // Optimization for the first block
+ if (SpecialTypes.empty())
+ SpecialTypes.swap(Record);
+ else
+ SpecialTypes.insert(SpecialTypes.end(), Record.begin(), Record.end());
+ break;
+
+ case pch::STATISTICS:
+ TotalNumStatements += Record[0];
+ TotalNumMacros += Record[1];
+ TotalLexicalDeclContexts += Record[2];
+ TotalVisibleDeclContexts += Record[3];
+ break;
+
+ case pch::TENTATIVE_DEFINITIONS:
+ // Optimization for the first block.
+ if (TentativeDefinitions.empty())
+ TentativeDefinitions.swap(Record);
+ else
+ TentativeDefinitions.insert(TentativeDefinitions.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::UNUSED_FILESCOPED_DECLS:
+ // Optimization for the first block.
+ if (UnusedFileScopedDecls.empty())
+ UnusedFileScopedDecls.swap(Record);
+ else
+ UnusedFileScopedDecls.insert(UnusedFileScopedDecls.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::WEAK_UNDECLARED_IDENTIFIERS:
+ // Later blocks overwrite earlier ones.
+ WeakUndeclaredIdentifiers.swap(Record);
+ break;
+
+ case pch::LOCALLY_SCOPED_EXTERNAL_DECLS:
+ // Optimization for the first block.
+ if (LocallyScopedExternalDecls.empty())
+ LocallyScopedExternalDecls.swap(Record);
+ else
+ LocallyScopedExternalDecls.insert(LocallyScopedExternalDecls.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::SELECTOR_OFFSETS:
+ F.SelectorOffsets = (const uint32_t *)BlobStart;
+ F.LocalNumSelectors = Record[0];
+ break;
+
+ case pch::METHOD_POOL:
+ F.SelectorLookupTableData = (const unsigned char *)BlobStart;
+ if (Record[0])
+ F.SelectorLookupTable
+ = PCHSelectorLookupTable::Create(
+ F.SelectorLookupTableData + Record[0],
+ F.SelectorLookupTableData,
+ PCHSelectorLookupTrait(*this));
+ TotalNumMethodPoolEntries += Record[1];
+ break;
+
+ case pch::REFERENCED_SELECTOR_POOL: {
+ ReferencedSelectorsData.insert(ReferencedSelectorsData.end(),
+ Record.begin(), Record.end());
+ break;
+ }
+
+ case pch::PP_COUNTER_VALUE:
+ if (!Record.empty() && Listener)
+ Listener->ReadCounter(Record[0]);
+ break;
+
+ case pch::SOURCE_LOCATION_OFFSETS:
+ F.SLocOffsets = (const uint32_t *)BlobStart;
+ F.LocalNumSLocEntries = Record[0];
+ // We cannot delay this until all PCHs are loaded, because then source
+ // location preloads would also have to be delayed.
+ TotalNumSLocEntries += F.LocalNumSLocEntries;
+ SourceMgr.PreallocateSLocEntries(this, TotalNumSLocEntries, Record[1]);
+ break;
+
+ case pch::SOURCE_LOCATION_PRELOADS:
+ for (unsigned I = 0, N = Record.size(); I != N; ++I) {
+ PCHReadResult Result = ReadSLocEntryRecord(Record[I]);
+ if (Result != Success)
+ return Result;
+ }
+ break;
+
+ case pch::STAT_CACHE: {
+ PCHStatCache *MyStatCache =
+ new PCHStatCache((const unsigned char *)BlobStart + Record[0],
+ (const unsigned char *)BlobStart,
+ NumStatHits, NumStatMisses);
+ FileMgr.addStatCache(MyStatCache);
+ F.StatCache = MyStatCache;
+ break;
+ }
+
+ case pch::EXT_VECTOR_DECLS:
+ // Optimization for the first block.
+ if (ExtVectorDecls.empty())
+ ExtVectorDecls.swap(Record);
+ else
+ ExtVectorDecls.insert(ExtVectorDecls.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::VTABLE_USES:
+ // Later tables overwrite earlier ones.
+ VTableUses.swap(Record);
+ break;
+
+ case pch::DYNAMIC_CLASSES:
+ // Optimization for the first block.
+ if (DynamicClasses.empty())
+ DynamicClasses.swap(Record);
+ else
+ DynamicClasses.insert(DynamicClasses.end(),
+ Record.begin(), Record.end());
+ break;
+
+ case pch::PENDING_IMPLICIT_INSTANTIATIONS:
+ // Optimization for the first block.
+ if (PendingImplicitInstantiations.empty())
+ PendingImplicitInstantiations.swap(Record);
+ else
+ PendingImplicitInstantiations.insert(
+ PendingImplicitInstantiations.end(), Record.begin(), Record.end());
+ break;
+
+ case pch::SEMA_DECL_REFS:
+ // Later tables overwrite earlier ones.
+ SemaDeclRefs.swap(Record);
+ break;
+
+ case pch::ORIGINAL_FILE_NAME:
+ // The primary PCH will be the last to get here, so it will be the one
+ // that's used.
+ ActualOriginalFileName.assign(BlobStart, BlobLen);
+ OriginalFileName = ActualOriginalFileName;
+ MaybeAddSystemRootToFilename(OriginalFileName);
+ break;
+
+ case pch::VERSION_CONTROL_BRANCH_REVISION: {
+ const std::string &CurBranch = getClangFullRepositoryVersion();
+ llvm::StringRef PCHBranch(BlobStart, BlobLen);
+ if (llvm::StringRef(CurBranch) != PCHBranch && !DisableValidation) {
+ Diag(diag::warn_pch_different_branch) << PCHBranch << CurBranch;
+ return IgnorePCH;
+ }
+ break;
+ }
+
+ case pch::MACRO_DEFINITION_OFFSETS:
+ F.MacroDefinitionOffsets = (const uint32_t *)BlobStart;
+ F.NumPreallocatedPreprocessingEntities = Record[0];
+ F.LocalNumMacroDefinitions = Record[1];
+ break;
+
+ case pch::DECL_REPLACEMENTS: {
+ if (Record.size() % 2 != 0) {
+ Error("invalid DECL_REPLACEMENTS block in PCH file");
+ return Failure;
+ }
+ for (unsigned I = 0, N = Record.size(); I != N; I += 2)
+ ReplacedDecls[static_cast<pch::DeclID>(Record[I])] =
+ std::make_pair(&F, Record[I+1]);
+ break;
+ }
+ }
+ First = false;
+ }
+ Error("premature end of bitstream in PCH file");
+ return Failure;
+}
+
+PCHReader::PCHReadResult PCHReader::ReadPCH(const std::string &FileName) {
+ switch(ReadPCHCore(FileName)) {
+ case Failure: return Failure;
+ case IgnorePCH: return IgnorePCH;
+ case Success: break;
+ }
+
+ // Here comes stuff that we only do once the entire chain is loaded.
+
+ // Allocate space for loaded identifiers, decls and types.
+ unsigned TotalNumIdentifiers = 0, TotalNumTypes = 0, TotalNumDecls = 0,
+ TotalNumPreallocatedPreprocessingEntities = 0, TotalNumMacroDefs = 0,
+ TotalNumSelectors = 0;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ TotalNumIdentifiers += Chain[I]->LocalNumIdentifiers;
+ TotalNumTypes += Chain[I]->LocalNumTypes;
+ TotalNumDecls += Chain[I]->LocalNumDecls;
+ TotalNumPreallocatedPreprocessingEntities +=
+ Chain[I]->NumPreallocatedPreprocessingEntities;
+ TotalNumMacroDefs += Chain[I]->LocalNumMacroDefinitions;
+ TotalNumSelectors += Chain[I]->LocalNumSelectors;
+ }
+ IdentifiersLoaded.resize(TotalNumIdentifiers);
+ TypesLoaded.resize(TotalNumTypes);
+ DeclsLoaded.resize(TotalNumDecls);
+ MacroDefinitionsLoaded.resize(TotalNumMacroDefs);
+ if (PP) {
+ if (TotalNumIdentifiers > 0)
+ PP->getHeaderSearchInfo().SetExternalLookup(this);
+ if (TotalNumPreallocatedPreprocessingEntities > 0) {
+ if (!PP->getPreprocessingRecord())
+ PP->createPreprocessingRecord();
+ PP->getPreprocessingRecord()->SetExternalSource(*this,
+ TotalNumPreallocatedPreprocessingEntities);
+ }
+ }
+ SelectorsLoaded.resize(TotalNumSelectors);
+
+ // Check the predefines buffers.
+ if (!DisableValidation && CheckPredefinesBuffers())
+ return IgnorePCH;
+
+ if (PP) {
+ // Initialization of keywords and pragmas occurs before the
+ // PCH file is read, so there may be some identifiers that were
+ // loaded into the IdentifierTable before we intercepted the
+ // creation of identifiers. Iterate through the list of known
+ // identifiers and determine whether we have to establish
+ // preprocessor definitions or top-level identifier declaration
+ // chains for those identifiers.
+ //
+ // We copy the IdentifierInfo pointers to a small vector first,
+ // since de-serializing declarations or macro definitions can add
+ // new entries into the identifier table, invalidating the
+ // iterators.
+ llvm::SmallVector<IdentifierInfo *, 128> Identifiers;
+ for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(),
+ IdEnd = PP->getIdentifierTable().end();
+ Id != IdEnd; ++Id)
+ Identifiers.push_back(Id->second);
+ // We need to search the tables in all files.
+ for (unsigned J = 0, M = Chain.size(); J != M; ++J) {
+ PCHIdentifierLookupTable *IdTable
+ = (PCHIdentifierLookupTable *)Chain[J]->IdentifierLookupTable;
+ // Not all PCH files necessarily have identifier tables, only the useful
+ // ones.
+ if (!IdTable)
+ continue;
+ for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) {
+ IdentifierInfo *II = Identifiers[I];
+ // Look in the on-disk hash tables for an entry for this identifier
+ PCHIdentifierLookupTrait Info(*this, Chain[J]->Stream, II);
+ std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength());
+ PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info);
+ if (Pos == IdTable->end())
+ continue;
+
+ // Dereferencing the iterator has the effect of populating the
+ // IdentifierInfo node with the various declarations it needs.
+ (void)*Pos;
+ }
+ }
+ }
+
+ if (Context)
+ InitializeContext(*Context);
+
+ return Success;
+}
+
+PCHReader::PCHReadResult PCHReader::ReadPCHCore(llvm::StringRef FileName) {
+ Chain.push_back(new PerFileData());
+ PerFileData &F = *Chain.back();
+
+ // Set the PCH file name.
+ F.FileName = FileName;
+
+ // Open the PCH file.
+ //
+ // FIXME: This shouldn't be here, we should just take a raw_ostream.
+ std::string ErrStr;
+ F.Buffer.reset(llvm::MemoryBuffer::getFileOrSTDIN(FileName, &ErrStr));
+ if (!F.Buffer) {
+ Error(ErrStr.c_str());
+ return IgnorePCH;
+ }
+
+ // Initialize the stream
+ F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(),
+ (const unsigned char *)F.Buffer->getBufferEnd());
+ llvm::BitstreamCursor &Stream = F.Stream;
+ Stream.init(F.StreamFile);
+ F.SizeInBits = F.Buffer->getBufferSize() * 8;
+
+ // Sniff for the signature.
+ if (Stream.Read(8) != 'C' ||
+ Stream.Read(8) != 'P' ||
+ Stream.Read(8) != 'C' ||
+ Stream.Read(8) != 'H') {
+ Diag(diag::err_not_a_pch_file) << FileName;
+ return Failure;
+ }
+
+ while (!Stream.AtEndOfStream()) {
+ unsigned Code = Stream.ReadCode();
+
+ if (Code != llvm::bitc::ENTER_SUBBLOCK) {
+ Error("invalid record at top-level of PCH file");
+ return Failure;
+ }
+
+ unsigned BlockID = Stream.ReadSubBlockID();
+
+ // We only know the PCH subblock ID.
+ switch (BlockID) {
+ case llvm::bitc::BLOCKINFO_BLOCK_ID:
+ if (Stream.ReadBlockInfoBlock()) {
+ Error("malformed BlockInfoBlock in PCH file");
+ return Failure;
+ }
+ break;
+ case pch::PCH_BLOCK_ID:
+ switch (ReadPCHBlock(F)) {
+ case Success:
+ break;
+
+ case Failure:
+ return Failure;
+
+ case IgnorePCH:
+ // FIXME: We could consider reading through to the end of this
+ // PCH block, skipping subblocks, to see if there are other
+ // PCH blocks elsewhere.
+
+ // Clear out any preallocated source location entries, so that
+ // the source manager does not try to resolve them later.
+ SourceMgr.ClearPreallocatedSLocEntries();
+
+ // Remove the stat cache.
+ if (F.StatCache)
+ FileMgr.removeStatCache((PCHStatCache*)F.StatCache);
+
+ return IgnorePCH;
+ }
+ break;
+ default:
+ if (Stream.SkipBlock()) {
+ Error("malformed block record in PCH file");
+ return Failure;
+ }
+ break;
+ }
+ }
+
+ return Success;
+}
+
+void PCHReader::setPreprocessor(Preprocessor &pp) {
+ PP = &pp;
+
+ unsigned TotalNum = 0;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I)
+ TotalNum += Chain[I]->NumPreallocatedPreprocessingEntities;
+ if (TotalNum) {
+ if (!PP->getPreprocessingRecord())
+ PP->createPreprocessingRecord();
+ PP->getPreprocessingRecord()->SetExternalSource(*this, TotalNum);
+ }
+}
+
+void PCHReader::InitializeContext(ASTContext &Ctx) {
+ Context = &Ctx;
+ assert(Context && "Passed null context!");
+
+ assert(PP && "Forgot to set Preprocessor ?");
+ PP->getIdentifierTable().setExternalIdentifierLookup(this);
+ PP->getHeaderSearchInfo().SetExternalLookup(this);
+ PP->setExternalSource(this);
+
+ // Load the translation unit declaration
+ GetTranslationUnitDecl();
+
+ // Load the special types.
+ Context->setBuiltinVaListType(
+ GetType(SpecialTypes[pch::SPECIAL_TYPE_BUILTIN_VA_LIST]));
+ if (unsigned Id = SpecialTypes[pch::SPECIAL_TYPE_OBJC_ID])
+ Context->setObjCIdType(GetType(Id));
+ if (unsigned Sel = SpecialTypes[pch::SPECIAL_TYPE_OBJC_SELECTOR])
+ Context->setObjCSelType(GetType(Sel));
+ if (unsigned Proto = SpecialTypes[pch::SPECIAL_TYPE_OBJC_PROTOCOL])
+ Context->setObjCProtoType(GetType(Proto));
+ if (unsigned Class = SpecialTypes[pch::SPECIAL_TYPE_OBJC_CLASS])
+ Context->setObjCClassType(GetType(Class));
+
+ if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_CF_CONSTANT_STRING])
+ Context->setCFConstantStringType(GetType(String));
+ if (unsigned FastEnum
+ = SpecialTypes[pch::SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE])
+ Context->setObjCFastEnumerationStateType(GetType(FastEnum));
+ if (unsigned File = SpecialTypes[pch::SPECIAL_TYPE_FILE]) {
+ QualType FileType = GetType(File);
+ if (FileType.isNull()) {
+ Error("FILE type is NULL");
+ return;
+ }
+ if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
+ Context->setFILEDecl(Typedef->getDecl());
+ else {
+ const TagType *Tag = FileType->getAs<TagType>();
+ if (!Tag) {
+ Error("Invalid FILE type in PCH file");
+ return;
+ }
+ Context->setFILEDecl(Tag->getDecl());
+ }
+ }
+ if (unsigned Jmp_buf = SpecialTypes[pch::SPECIAL_TYPE_jmp_buf]) {
+ QualType Jmp_bufType = GetType(Jmp_buf);
+ if (Jmp_bufType.isNull()) {
+ Error("jmp_bug type is NULL");
+ return;
+ }
+ if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
+ Context->setjmp_bufDecl(Typedef->getDecl());
+ else {
+ const TagType *Tag = Jmp_bufType->getAs<TagType>();
+ if (!Tag) {
+ Error("Invalid jmp_bug type in PCH file");
+ return;
+ }
+ Context->setjmp_bufDecl(Tag->getDecl());
+ }
+ }
+ if (unsigned Sigjmp_buf = SpecialTypes[pch::SPECIAL_TYPE_sigjmp_buf]) {
+ QualType Sigjmp_bufType = GetType(Sigjmp_buf);
+ if (Sigjmp_bufType.isNull()) {
+ Error("sigjmp_buf type is NULL");
+ return;
+ }
+ if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
+ Context->setsigjmp_bufDecl(Typedef->getDecl());
+ else {
+ const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
+ assert(Tag && "Invalid sigjmp_buf type in PCH file");
+ Context->setsigjmp_bufDecl(Tag->getDecl());
+ }
+ }
+ if (unsigned ObjCIdRedef
+ = SpecialTypes[pch::SPECIAL_TYPE_OBJC_ID_REDEFINITION])
+ Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef);
+ if (unsigned ObjCClassRedef
+ = SpecialTypes[pch::SPECIAL_TYPE_OBJC_CLASS_REDEFINITION])
+ Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef);
+ if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_BLOCK_DESCRIPTOR])
+ Context->setBlockDescriptorType(GetType(String));
+ if (unsigned String
+ = SpecialTypes[pch::SPECIAL_TYPE_BLOCK_EXTENDED_DESCRIPTOR])
+ Context->setBlockDescriptorExtendedType(GetType(String));
+ if (unsigned ObjCSelRedef
+ = SpecialTypes[pch::SPECIAL_TYPE_OBJC_SEL_REDEFINITION])
+ Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef);
+ if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_NS_CONSTANT_STRING])
+ Context->setNSConstantStringType(GetType(String));
+
+ if (SpecialTypes[pch::SPECIAL_TYPE_INT128_INSTALLED])
+ Context->setInt128Installed();
+}
+
+/// \brief Retrieve the name of the original source file name
+/// directly from the PCH file, without actually loading the PCH
+/// file.
+std::string PCHReader::getOriginalSourceFile(const std::string &PCHFileName,
+ Diagnostic &Diags) {
+ // Open the PCH file.
+ std::string ErrStr;
+ llvm::OwningPtr<llvm::MemoryBuffer> Buffer;
+ Buffer.reset(llvm::MemoryBuffer::getFile(PCHFileName.c_str(), &ErrStr));
+ if (!Buffer) {
+ Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr;
+ return std::string();
+ }
+
+ // Initialize the stream
+ llvm::BitstreamReader StreamFile;
+ llvm::BitstreamCursor Stream;
+ StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
+ (const unsigned char *)Buffer->getBufferEnd());
+ Stream.init(StreamFile);
+
+ // Sniff for the signature.
+ if (Stream.Read(8) != 'C' ||
+ Stream.Read(8) != 'P' ||
+ Stream.Read(8) != 'C' ||
+ Stream.Read(8) != 'H') {
+ Diags.Report(diag::err_fe_not_a_pch_file) << PCHFileName;
+ return std::string();
+ }
+
+ RecordData Record;
+ while (!Stream.AtEndOfStream()) {
+ unsigned Code = Stream.ReadCode();
+
+ if (Code == llvm::bitc::ENTER_SUBBLOCK) {
+ unsigned BlockID = Stream.ReadSubBlockID();
+
+ // We only know the PCH subblock ID.
+ switch (BlockID) {
+ case pch::PCH_BLOCK_ID:
+ if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) {
+ Diags.Report(diag::err_fe_pch_malformed_block) << PCHFileName;
+ return std::string();
+ }
+ break;
+
+ default:
+ if (Stream.SkipBlock()) {
+ Diags.Report(diag::err_fe_pch_malformed_block) << PCHFileName;
+ return std::string();
+ }
+ break;
+ }
+ continue;
+ }
+
+ if (Code == llvm::bitc::END_BLOCK) {
+ if (Stream.ReadBlockEnd()) {
+ Diags.Report(diag::err_fe_pch_error_at_end_block) << PCHFileName;
+ return std::string();
+ }
+ continue;
+ }
+
+ if (Code == llvm::bitc::DEFINE_ABBREV) {
+ Stream.ReadAbbrevRecord();
+ continue;
+ }
+
+ Record.clear();
+ const char *BlobStart = 0;
+ unsigned BlobLen = 0;
+ if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen)
+ == pch::ORIGINAL_FILE_NAME)
+ return std::string(BlobStart, BlobLen);
+ }
+
+ return std::string();
+}
+
+/// \brief Parse the record that corresponds to a LangOptions data
+/// structure.
+///
+/// This routine compares the language options used to generate the
+/// PCH file against the language options set for the current
+/// compilation. For each option, we classify differences between the
+/// two compiler states as either "benign" or "important". Benign
+/// differences don't matter, and we accept them without complaint
+/// (and without modifying the language options). Differences between
+/// the states for important options cause the PCH file to be
+/// unusable, so we emit a warning and return true to indicate that
+/// there was an error.
+///
+/// \returns true if the PCH file is unacceptable, false otherwise.
+bool PCHReader::ParseLanguageOptions(
+ const llvm::SmallVectorImpl<uint64_t> &Record) {
+ if (Listener) {
+ LangOptions LangOpts;
+
+ #define PARSE_LANGOPT(Option) \
+ LangOpts.Option = Record[Idx]; \
+ ++Idx
+
+ unsigned Idx = 0;
+ PARSE_LANGOPT(Trigraphs);
+ PARSE_LANGOPT(BCPLComment);
+ PARSE_LANGOPT(DollarIdents);
+ PARSE_LANGOPT(AsmPreprocessor);
+ PARSE_LANGOPT(GNUMode);
+ PARSE_LANGOPT(GNUKeywords);
+ PARSE_LANGOPT(ImplicitInt);
+ PARSE_LANGOPT(Digraphs);
+ PARSE_LANGOPT(HexFloats);
+ PARSE_LANGOPT(C99);
+ PARSE_LANGOPT(Microsoft);
+ PARSE_LANGOPT(CPlusPlus);
+ PARSE_LANGOPT(CPlusPlus0x);
+ PARSE_LANGOPT(CXXOperatorNames);
+ PARSE_LANGOPT(ObjC1);
+ PARSE_LANGOPT(ObjC2);
+ PARSE_LANGOPT(ObjCNonFragileABI);
+ PARSE_LANGOPT(ObjCNonFragileABI2);
+ PARSE_LANGOPT(NoConstantCFStrings);
+ PARSE_LANGOPT(PascalStrings);
+ PARSE_LANGOPT(WritableStrings);
+ PARSE_LANGOPT(LaxVectorConversions);
+ PARSE_LANGOPT(AltiVec);
+ PARSE_LANGOPT(Exceptions);
+ PARSE_LANGOPT(SjLjExceptions);
+ PARSE_LANGOPT(NeXTRuntime);
+ PARSE_LANGOPT(Freestanding);
+ PARSE_LANGOPT(NoBuiltin);
+ PARSE_LANGOPT(ThreadsafeStatics);
+ PARSE_LANGOPT(POSIXThreads);
+ PARSE_LANGOPT(Blocks);
+ PARSE_LANGOPT(EmitAllDecls);
+ PARSE_LANGOPT(MathErrno);
+ LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy)
+ Record[Idx++]);
+ PARSE_LANGOPT(HeinousExtensions);
+ PARSE_LANGOPT(Optimize);
+ PARSE_LANGOPT(OptimizeSize);
+ PARSE_LANGOPT(Static);
+ PARSE_LANGOPT(PICLevel);
+ PARSE_LANGOPT(GNUInline);
+ PARSE_LANGOPT(NoInline);
+ PARSE_LANGOPT(AccessControl);
+ PARSE_LANGOPT(CharIsSigned);
+ PARSE_LANGOPT(ShortWChar);
+ LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]);
+ LangOpts.setVisibilityMode((LangOptions::VisibilityMode)Record[Idx++]);
+ LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode)
+ Record[Idx++]);
+ PARSE_LANGOPT(InstantiationDepth);
+ PARSE_LANGOPT(OpenCL);
+ PARSE_LANGOPT(CatchUndefined);
+ // FIXME: Missing ElideConstructors?!
+ #undef PARSE_LANGOPT
+
+ return Listener->ReadLanguageOptions(LangOpts);
+ }
+
+ return false;
+}
+
+void PCHReader::ReadPreprocessedEntities() {
+ ReadDefinedMacros();
+}
+
+/// \brief Get the correct cursor and offset for loading a type.
+PCHReader::RecordLocation PCHReader::TypeCursorForIndex(unsigned Index) {
+ PerFileData *F = 0;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ F = Chain[N - I - 1];
+ if (Index < F->LocalNumTypes)
+ break;
+ Index -= F->LocalNumTypes;
+ }
+ assert(F && F->LocalNumTypes > Index && "Broken chain");
+ return RecordLocation(&F->DeclsCursor, F->TypeOffsets[Index]);
+}
+
+/// \brief Read and return the type with the given index..
+///
+/// The index is the type ID, shifted and minus the number of predefs. This
+/// routine actually reads the record corresponding to the type at the given
+/// location. It is a helper routine for GetType, which deals with reading type
+/// IDs.
+QualType PCHReader::ReadTypeRecord(unsigned Index) {
+ RecordLocation Loc = TypeCursorForIndex(Index);
+ llvm::BitstreamCursor &DeclsCursor = *Loc.first;
+
+ // Keep track of where we are in the stream, then jump back there
+ // after reading this type.
+ SavedStreamPosition SavedPosition(DeclsCursor);
+
+ ReadingKindTracker ReadingKind(Read_Type, *this);
+
+ // Note that we are loading a type record.
+ Deserializing AType(this);
+
+ DeclsCursor.JumpToBit(Loc.second);
+ RecordData Record;
+ unsigned Code = DeclsCursor.ReadCode();
+ switch ((pch::TypeCode)DeclsCursor.ReadRecord(Code, Record)) {
+ case pch::TYPE_EXT_QUAL: {
+ if (Record.size() != 2) {
+ Error("Incorrect encoding of extended qualifier type");
+ return QualType();
+ }
+ QualType Base = GetType(Record[0]);
+ Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]);
+ return Context->getQualifiedType(Base, Quals);
+ }
+
+ case pch::TYPE_COMPLEX: {
+ if (Record.size() != 1) {
+ Error("Incorrect encoding of complex type");
+ return QualType();
+ }
+ QualType ElemType = GetType(Record[0]);
+ return Context->getComplexType(ElemType);
+ }
+
+ case pch::TYPE_POINTER: {
+ if (Record.size() != 1) {
+ Error("Incorrect encoding of pointer type");
+ return QualType();
+ }
+ QualType PointeeType = GetType(Record[0]);
+ return Context->getPointerType(PointeeType);
+ }
+
+ case pch::TYPE_BLOCK_POINTER: {
+ if (Record.size() != 1) {
+ Error("Incorrect encoding of block pointer type");
+ return QualType();
+ }
+ QualType PointeeType = GetType(Record[0]);
+ return Context->getBlockPointerType(PointeeType);
+ }
+
+ case pch::TYPE_LVALUE_REFERENCE: {
+ if (Record.size() != 1) {
+ Error("Incorrect encoding of lvalue reference type");
+ return QualType();
+ }
+ QualType PointeeType = GetType(Record[0]);
+ return Context->getLValueReferenceType(PointeeType);
+ }
+
+ case pch::TYPE_RVALUE_REFERENCE: {
+ if (Record.size() != 1) {
+ Error("Incorrect encoding of rvalue reference type");
+ return QualType();
+ }
+ QualType PointeeType = GetType(Record[0]);
+ return Context->getRValueReferenceType(PointeeType);
+ }
+
+ case pch::TYPE_MEMBER_POINTER: {
+ if (Record.size() != 2) {
+ Error("Incorrect encoding of member pointer type");
+ return QualType();
+ }
+ QualType PointeeType = GetType(Record[0]);
+ QualType ClassType = GetType(Record[1]);
+ return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr());
+ }
+
+ case pch::TYPE_CONSTANT_ARRAY: {
+ QualType ElementType = GetType(Record[0]);
+ ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
+ unsigned IndexTypeQuals = Record[2];
+ unsigned Idx = 3;
+ llvm::APInt Size = ReadAPInt(Record, Idx);
+ return Context->getConstantArrayType(ElementType, Size,
+ ASM, IndexTypeQuals);
+ }
+
+ case pch::TYPE_INCOMPLETE_ARRAY: {
+ QualType ElementType = GetType(Record[0]);
+ ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
+ unsigned IndexTypeQuals = Record[2];
+ return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
+ }
+
+ case pch::TYPE_VARIABLE_ARRAY: {
+ QualType ElementType = GetType(Record[0]);
+ ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
+ unsigned IndexTypeQuals = Record[2];
+ SourceLocation LBLoc = SourceLocation::getFromRawEncoding(Record[3]);
+ SourceLocation RBLoc = SourceLocation::getFromRawEncoding(Record[4]);
+ return Context->getVariableArrayType(ElementType, ReadExpr(DeclsCursor),
+ ASM, IndexTypeQuals,
+ SourceRange(LBLoc, RBLoc));
+ }
+
+ case pch::TYPE_VECTOR: {
+ if (Record.size() != 3) {
+ Error("incorrect encoding of vector type in PCH file");
+ return QualType();
+ }
+
+ QualType ElementType = GetType(Record[0]);
+ unsigned NumElements = Record[1];
+ unsigned AltiVecSpec = Record[2];
+ return Context->getVectorType(ElementType, NumElements,
+ (VectorType::AltiVecSpecific)AltiVecSpec);
+ }
+
+ case pch::TYPE_EXT_VECTOR: {
+ if (Record.size() != 3) {
+ Error("incorrect encoding of extended vector type in PCH file");
+ return QualType();
+ }
+
+ QualType ElementType = GetType(Record[0]);
+ unsigned NumElements = Record[1];
+ return Context->getExtVectorType(ElementType, NumElements);
+ }
+
+ case pch::TYPE_FUNCTION_NO_PROTO: {
+ if (Record.size() != 4) {
+ Error("incorrect encoding of no-proto function type");
+ return QualType();
+ }
+ QualType ResultType = GetType(Record[0]);
+ FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]);
+ return Context->getFunctionNoProtoType(ResultType, Info);
+ }
+
+ case pch::TYPE_FUNCTION_PROTO: {
+ QualType ResultType = GetType(Record[0]);
+ bool NoReturn = Record[1];
+ unsigned RegParm = Record[2];
+ CallingConv CallConv = (CallingConv)Record[3];
+ unsigned Idx = 4;
+ unsigned NumParams = Record[Idx++];
+ llvm::SmallVector<QualType, 16> ParamTypes;
+ for (unsigned I = 0; I != NumParams; ++I)
+ ParamTypes.push_back(GetType(Record[Idx++]));
+ bool isVariadic = Record[Idx++];
+ unsigned Quals = Record[Idx++];
+ bool hasExceptionSpec = Record[Idx++];
+ bool hasAnyExceptionSpec = Record[Idx++];
+ unsigned NumExceptions = Record[Idx++];
+ llvm::SmallVector<QualType, 2> Exceptions;
+ for (unsigned I = 0; I != NumExceptions; ++I)
+ Exceptions.push_back(GetType(Record[Idx++]));
+ return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams,
+ isVariadic, Quals, hasExceptionSpec,
+ hasAnyExceptionSpec, NumExceptions,
+ Exceptions.data(),
+ FunctionType::ExtInfo(NoReturn, RegParm,
+ CallConv));
+ }
+
+ case pch::TYPE_UNRESOLVED_USING:
+ return Context->getTypeDeclType(
+ cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0])));
+
+ case pch::TYPE_TYPEDEF: {
+ if (Record.size() != 2) {
+ Error("incorrect encoding of typedef type");
+ return QualType();
+ }
+ TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0]));
+ QualType Canonical = GetType(Record[1]);
+ return Context->getTypedefType(Decl, Canonical);
+ }
+
+ case pch::TYPE_TYPEOF_EXPR:
+ return Context->getTypeOfExprType(ReadExpr(DeclsCursor));
+
+ case pch::TYPE_TYPEOF: {
+ if (Record.size() != 1) {
+ Error("incorrect encoding of typeof(type) in PCH file");
+ return QualType();
+ }
+ QualType UnderlyingType = GetType(Record[0]);
+ return Context->getTypeOfType(UnderlyingType);
+ }
+
+ case pch::TYPE_DECLTYPE:
+ return Context->getDecltypeType(ReadExpr(DeclsCursor));
+
+ case pch::TYPE_RECORD: {
+ if (Record.size() != 2) {
+ Error("incorrect encoding of record type");
+ return QualType();
+ }
+ bool IsDependent = Record[0];
+ QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1])));
+ T->Dependent = IsDependent;
+ return T;
+ }
+
+ case pch::TYPE_ENUM: {
+ if (Record.size() != 2) {
+ Error("incorrect encoding of enum type");
+ return QualType();
+ }
+ bool IsDependent = Record[0];
+ QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1])));
+ T->Dependent = IsDependent;
+ return T;
+ }
+
+ case pch::TYPE_ELABORATED: {
+ unsigned Idx = 0;
+ ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
+ NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx);
+ QualType NamedType = GetType(Record[Idx++]);
+ return Context->getElaboratedType(Keyword, NNS, NamedType);
+ }
+
+ case pch::TYPE_OBJC_INTERFACE: {
+ unsigned Idx = 0;
+ ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++]));
+ return Context->getObjCInterfaceType(ItfD);
+ }
+
+ case pch::TYPE_OBJC_OBJECT: {
+ unsigned Idx = 0;
+ QualType Base = GetType(Record[Idx++]);
+ unsigned NumProtos = Record[Idx++];
+ llvm::SmallVector<ObjCProtocolDecl*, 4> Protos;
+ for (unsigned I = 0; I != NumProtos; ++I)
+ Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++])));
+ return Context->getObjCObjectType(Base, Protos.data(), NumProtos);
+ }
+
+ case pch::TYPE_OBJC_OBJECT_POINTER: {
+ unsigned Idx = 0;
+ QualType Pointee = GetType(Record[Idx++]);
+ return Context->getObjCObjectPointerType(Pointee);
+ }
+
+ case pch::TYPE_SUBST_TEMPLATE_TYPE_PARM: {
+ unsigned Idx = 0;
+ QualType Parm = GetType(Record[Idx++]);
+ QualType Replacement = GetType(Record[Idx++]);
+ return
+ Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm),
+ Replacement);
+ }
+
+ case pch::TYPE_INJECTED_CLASS_NAME: {
+ CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0]));
+ QualType TST = GetType(Record[1]); // probably derivable
+ // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
+ // for PCH reading, too much interdependencies.
+ return
+ QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0);
+ }
+
+ case pch::TYPE_TEMPLATE_TYPE_PARM: {
+ unsigned Idx = 0;
+ unsigned Depth = Record[Idx++];
+ unsigned Index = Record[Idx++];
+ bool Pack = Record[Idx++];
+ IdentifierInfo *Name = GetIdentifierInfo(Record, Idx);
+ return Context->getTemplateTypeParmType(Depth, Index, Pack, Name);
+ }
+
+ case pch::TYPE_DEPENDENT_NAME: {
+ unsigned Idx = 0;
+ ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
+ NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx);
+ const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx);
+ QualType Canon = GetType(Record[Idx++]);
+ return Context->getDependentNameType(Keyword, NNS, Name, Canon);
+ }
+
+ case pch::TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
+ unsigned Idx = 0;
+ ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
+ NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx);
+ const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx);
+ unsigned NumArgs = Record[Idx++];
+ llvm::SmallVector<TemplateArgument, 8> Args;
+ Args.reserve(NumArgs);
+ while (NumArgs--)
+ Args.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx));
+ return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name,
+ Args.size(), Args.data());
+ }
+
+ case pch::TYPE_DEPENDENT_SIZED_ARRAY: {
+ unsigned Idx = 0;
+
+ // ArrayType
+ QualType ElementType = GetType(Record[Idx++]);
+ ArrayType::ArraySizeModifier ASM
+ = (ArrayType::ArraySizeModifier)Record[Idx++];
+ unsigned IndexTypeQuals = Record[Idx++];
+
+ // DependentSizedArrayType
+ Expr *NumElts = ReadExpr(DeclsCursor);
+ SourceRange Brackets = ReadSourceRange(Record, Idx);
+
+ return Context->getDependentSizedArrayType(ElementType, NumElts, ASM,
+ IndexTypeQuals, Brackets);
+ }
+
+ case pch::TYPE_TEMPLATE_SPECIALIZATION: {
+ unsigned Idx = 0;
+ bool IsDependent = Record[Idx++];
+ TemplateName Name = ReadTemplateName(Record, Idx);
+ llvm::SmallVector<TemplateArgument, 8> Args;
+ ReadTemplateArgumentList(Args, DeclsCursor, Record, Idx);
+ QualType Canon = GetType(Record[Idx++]);
+ QualType T;
+ if (Canon.isNull())
+ T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(),
+ Args.size());
+ else
+ T = Context->getTemplateSpecializationType(Name, Args.data(),
+ Args.size(), Canon);
+ T->Dependent = IsDependent;
+ return T;
+ }
+ }
+ // Suppress a GCC warning
+ return QualType();
+}
+
+namespace {
+
+class TypeLocReader : public TypeLocVisitor<TypeLocReader> {
+ PCHReader &Reader;
+ llvm::BitstreamCursor &DeclsCursor;
+ const PCHReader::RecordData &Record;
+ unsigned &Idx;
+
+public:
+ TypeLocReader(PCHReader &Reader, llvm::BitstreamCursor &Cursor,
+ const PCHReader::RecordData &Record, unsigned &Idx)
+ : Reader(Reader), DeclsCursor(Cursor), Record(Record), Idx(Idx) { }
+
+ // We want compile-time assurance that we've enumerated all of
+ // these, so unfortunately we have to declare them first, then
+ // define them out-of-line.
+#define ABSTRACT_TYPELOC(CLASS, PARENT)
+#define TYPELOC(CLASS, PARENT) \
+ void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
+#include "clang/AST/TypeLocNodes.def"
+
+ void VisitFunctionTypeLoc(FunctionTypeLoc);
+ void VisitArrayTypeLoc(ArrayTypeLoc);
+};
+
+}
+
+void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
+ // nothing to do
+}
+void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
+ TL.setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ if (TL.needsExtraLocalData()) {
+ TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
+ TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
+ TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
+ TL.setModeAttr(Record[Idx++]);
+ }
+}
+void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
+ TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
+ TL.setCaretLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
+ TL.setAmpLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
+ TL.setAmpAmpLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
+ TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
+ TL.setLBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ if (Record[Idx++])
+ TL.setSizeExpr(Reader.ReadExpr(DeclsCursor));
+ else
+ TL.setSizeExpr(0);
+}
+void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocReader::VisitDependentSizedArrayTypeLoc(
+ DependentSizedArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
+ DependentSizedExtVectorTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
+ TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) {
+ TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
+ }
+}
+void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
+ VisitFunctionTypeLoc(TL);
+}
+void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
+ VisitFunctionTypeLoc(TL);
+}
+void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
+ TL.setTypeofLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
+ TL.setTypeofLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(DeclsCursor, Record, Idx));
+}
+void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
+ SubstTemplateTypeParmTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitTemplateSpecializationTypeLoc(
+ TemplateSpecializationTypeLoc TL) {
+ TL.setTemplateNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
+ TL.setArgLocInfo(i,
+ Reader.GetTemplateArgumentLocInfo(TL.getTypePtr()->getArg(i).getKind(),
+ DeclsCursor, Record, Idx));
+}
+void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
+ TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx));
+}
+void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
+ TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx));
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
+ DependentTemplateSpecializationTypeLoc TL) {
+ TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx));
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
+ TL.setArgLocInfo(I,
+ Reader.GetTemplateArgumentLocInfo(TL.getTypePtr()->getArg(I).getKind(),
+ DeclsCursor, Record, Idx));
+}
+void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
+ TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
+ TL.setHasBaseTypeAsWritten(Record[Idx++]);
+ TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+ for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
+ TL.setProtocolLoc(i, SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
+ TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+}
+
+TypeSourceInfo *PCHReader::GetTypeSourceInfo(llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record,
+ unsigned &Idx) {
+ QualType InfoTy = GetType(Record[Idx++]);
+ if (InfoTy.isNull())
+ return 0;
+
+ TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy);
+ TypeLocReader TLR(*this, DeclsCursor, Record, Idx);
+ for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
+ TLR.Visit(TL);
+ return TInfo;
+}
+
+QualType PCHReader::GetType(pch::TypeID ID) {
+ unsigned FastQuals = ID & Qualifiers::FastMask;
+ unsigned Index = ID >> Qualifiers::FastWidth;
+
+ if (Index < pch::NUM_PREDEF_TYPE_IDS) {
+ QualType T;
+ switch ((pch::PredefinedTypeIDs)Index) {
+ case pch::PREDEF_TYPE_NULL_ID: return QualType();
+ case pch::PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break;
+ case pch::PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break;
+
+ case pch::PREDEF_TYPE_CHAR_U_ID:
+ case pch::PREDEF_TYPE_CHAR_S_ID:
+ // FIXME: Check that the signedness of CharTy is correct!
+ T = Context->CharTy;
+ break;
+
+ case pch::PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break;
+ case pch::PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break;
+ case pch::PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break;
+ case pch::PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break;
+ case pch::PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break;
+ case pch::PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break;
+ case pch::PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break;
+ case pch::PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break;
+ case pch::PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break;
+ case pch::PREDEF_TYPE_INT_ID: T = Context->IntTy; break;
+ case pch::PREDEF_TYPE_LONG_ID: T = Context->LongTy; break;
+ case pch::PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break;
+ case pch::PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break;
+ case pch::PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break;
+ case pch::PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break;
+ case pch::PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break;
+ case pch::PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break;
+ case pch::PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break;
+ case pch::PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break;
+ case pch::PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break;
+ case pch::PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break;
+ case pch::PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break;
+ case pch::PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break;
+ case pch::PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break;
+ }
+
+ assert(!T.isNull() && "Unknown predefined type");
+ return T.withFastQualifiers(FastQuals);
+ }
+
+ Index -= pch::NUM_PREDEF_TYPE_IDS;
+ assert(Index < TypesLoaded.size() && "Type index out-of-range");
+ if (TypesLoaded[Index].isNull()) {
+ TypesLoaded[Index] = ReadTypeRecord(Index);
+ TypesLoaded[Index]->setFromPCH();
+ if (DeserializationListener)
+ DeserializationListener->TypeRead(ID >> Qualifiers::FastWidth,
+ TypesLoaded[Index]);
+ }
+
+ return TypesLoaded[Index].withFastQualifiers(FastQuals);
+}
+
+TemplateArgumentLocInfo
+PCHReader::GetTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind,
+ llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record,
+ unsigned &Index) {
+ switch (Kind) {
+ case TemplateArgument::Expression:
+ return ReadExpr(DeclsCursor);
+ case TemplateArgument::Type:
+ return GetTypeSourceInfo(DeclsCursor, Record, Index);
+ case TemplateArgument::Template: {
+ SourceRange QualifierRange = ReadSourceRange(Record, Index);
+ SourceLocation TemplateNameLoc = ReadSourceLocation(Record, Index);
+ return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc);
+ }
+ case TemplateArgument::Null:
+ case TemplateArgument::Integral:
+ case TemplateArgument::Declaration:
+ case TemplateArgument::Pack:
+ return TemplateArgumentLocInfo();
+ }
+ llvm_unreachable("unexpected template argument loc");
+ return TemplateArgumentLocInfo();
+}
+
+TemplateArgumentLoc
+PCHReader::ReadTemplateArgumentLoc(llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record, unsigned &Index) {
+ TemplateArgument Arg = ReadTemplateArgument(DeclsCursor, Record, Index);
+
+ if (Arg.getKind() == TemplateArgument::Expression) {
+ if (Record[Index++]) // bool InfoHasSameExpr.
+ return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
+ }
+ return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(Arg.getKind(),
+ DeclsCursor,
+ Record, Index));
+}
+
+Decl *PCHReader::GetExternalDecl(uint32_t ID) {
+ return GetDecl(ID);
+}
+
+TranslationUnitDecl *PCHReader::GetTranslationUnitDecl() {
+ if (!DeclsLoaded[0]) {
+ ReadDeclRecord(0, 0);
+ if (DeserializationListener)
+ DeserializationListener->DeclRead(1, DeclsLoaded[0]);
+ }
+
+ return cast<TranslationUnitDecl>(DeclsLoaded[0]);
+}
+
+Decl *PCHReader::GetDecl(pch::DeclID ID) {
+ if (ID == 0)
+ return 0;
+
+ if (ID > DeclsLoaded.size()) {
+ Error("declaration ID out-of-range for PCH file");
+ return 0;
+ }
+
+ unsigned Index = ID - 1;
+ if (!DeclsLoaded[Index]) {
+ ReadDeclRecord(Index, ID);
+ if (DeserializationListener)
+ DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
+ }
+
+ return DeclsLoaded[Index];
+}
+
+/// \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).
+Stmt *PCHReader::GetExternalDeclStmt(uint64_t Offset) {
+ // Offset here is a global offset across the entire chain.
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PerFileData &F = *Chain[N - I - 1];
+ if (Offset < F.SizeInBits) {
+ // Since we know that this statement is part of a decl, make sure to use
+ // the decl cursor to read it.
+ F.DeclsCursor.JumpToBit(Offset);
+ return ReadStmtFromStream(F.DeclsCursor);
+ }
+ Offset -= F.SizeInBits;
+ }
+ llvm_unreachable("Broken chain");
+}
+
+bool PCHReader::FindExternalLexicalDecls(const DeclContext *DC,
+ llvm::SmallVectorImpl<Decl*> &Decls) {
+ assert(DC->hasExternalLexicalStorage() &&
+ "DeclContext has no lexical decls in storage");
+
+ // There might be lexical decls in multiple parts of the chain, for the TU
+ // at least.
+ DeclContextInfos &Infos = DeclContextOffsets[DC];
+ for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end();
+ I != E; ++I) {
+ // IDs can be 0 if this context doesn't contain declarations.
+ if (!I->LexicalDecls)
+ continue;
+
+ // Load all of the declaration IDs
+ for (const pch::DeclID *ID = I->LexicalDecls,
+ *IDE = ID + I->NumLexicalDecls;
+ ID != IDE; ++ID)
+ Decls.push_back(GetDecl(*ID));
+ }
+
+ ++NumLexicalDeclContextsRead;
+ return false;
+}
+
+DeclContext::lookup_result
+PCHReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
+ DeclarationName Name) {
+ assert(DC->hasExternalVisibleStorage() &&
+ "DeclContext has no visible decls in storage");
+
+ llvm::SmallVector<VisibleDeclaration, 64> Decls;
+ // There might be lexical decls in multiple parts of the chain, for the TU
+ // and namespaces.
+ DeclContextInfos &Infos = DeclContextOffsets[DC];
+ for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end();
+ I != E; ++I) {
+ uint64_t Offset = I->OffsetToVisibleDecls;
+ if (Offset == 0)
+ continue;
+
+ llvm::BitstreamCursor &DeclsCursor = *I->Stream;
+
+ // Keep track of where we are in the stream, then jump back there
+ // after reading this context.
+ SavedStreamPosition SavedPosition(DeclsCursor);
+
+ // Load the record containing all of the declarations visible in
+ // this context.
+ DeclsCursor.JumpToBit(Offset);
+ RecordData Record;
+ unsigned Code = DeclsCursor.ReadCode();
+ unsigned RecCode = DeclsCursor.ReadRecord(Code, Record);
+ if (RecCode != pch::DECL_CONTEXT_VISIBLE) {
+ Error("Expected visible block");
+ return DeclContext::lookup_result(DeclContext::lookup_iterator(),
+ DeclContext::lookup_iterator());
+ }
+
+ if (Record.empty())
+ continue;
+
+ unsigned Idx = 0;
+ while (Idx < Record.size()) {
+ Decls.push_back(VisibleDeclaration());
+ Decls.back().Name = ReadDeclarationName(Record, Idx);
+
+ unsigned Size = Record[Idx++];
+ llvm::SmallVector<unsigned, 4> &LoadedDecls = Decls.back().Declarations;
+ LoadedDecls.reserve(Size);
+ for (unsigned J = 0; J < Size; ++J)
+ LoadedDecls.push_back(Record[Idx++]);
+ }
+ }
+
+ ++NumVisibleDeclContextsRead;
+
+ SetExternalVisibleDecls(DC, Decls);
+ return const_cast<DeclContext*>(DC)->lookup(Name);
+}
+
+void PCHReader::PassInterestingDeclsToConsumer() {
+ assert(Consumer);
+ while (!InterestingDecls.empty()) {
+ DeclGroupRef DG(InterestingDecls.front());
+ InterestingDecls.pop_front();
+ Consumer->HandleInterestingDecl(DG);
+ }
+}
+
+void PCHReader::StartTranslationUnit(ASTConsumer *Consumer) {
+ this->Consumer = Consumer;
+
+ if (!Consumer)
+ return;
+
+ for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) {
+ // Force deserialization of this decl, which will cause it to be queued for
+ // passing to the consumer.
+ GetDecl(ExternalDefinitions[I]);
+ }
+
+ PassInterestingDeclsToConsumer();
+}
+
+void PCHReader::PrintStats() {
+ std::fprintf(stderr, "*** PCH Statistics:\n");
+
+ unsigned NumTypesLoaded
+ = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
+ QualType());
+ unsigned NumDeclsLoaded
+ = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
+ (Decl *)0);
+ unsigned NumIdentifiersLoaded
+ = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
+ IdentifiersLoaded.end(),
+ (IdentifierInfo *)0);
+ unsigned NumSelectorsLoaded
+ = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
+ SelectorsLoaded.end(),
+ Selector());
+
+ std::fprintf(stderr, " %u stat cache hits\n", NumStatHits);
+ std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses);
+ if (TotalNumSLocEntries)
+ std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n",
+ NumSLocEntriesRead, TotalNumSLocEntries,
+ ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
+ if (!TypesLoaded.empty())
+ std::fprintf(stderr, " %u/%u types read (%f%%)\n",
+ NumTypesLoaded, (unsigned)TypesLoaded.size(),
+ ((float)NumTypesLoaded/TypesLoaded.size() * 100));
+ if (!DeclsLoaded.empty())
+ std::fprintf(stderr, " %u/%u declarations read (%f%%)\n",
+ NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
+ ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
+ if (!IdentifiersLoaded.empty())
+ std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n",
+ NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
+ ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
+ if (!SelectorsLoaded.empty())
+ std::fprintf(stderr, " %u/%u selectors read (%f%%)\n",
+ NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
+ ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
+ if (TotalNumStatements)
+ std::fprintf(stderr, " %u/%u statements read (%f%%)\n",
+ NumStatementsRead, TotalNumStatements,
+ ((float)NumStatementsRead/TotalNumStatements * 100));
+ if (TotalNumMacros)
+ std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
+ NumMacrosRead, TotalNumMacros,
+ ((float)NumMacrosRead/TotalNumMacros * 100));
+ if (TotalLexicalDeclContexts)
+ std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n",
+ NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
+ ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
+ * 100));
+ if (TotalVisibleDeclContexts)
+ std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n",
+ NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
+ ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
+ * 100));
+ if (TotalNumMethodPoolEntries) {
+ std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n",
+ NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
+ ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
+ * 100));
+ std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses);
+ }
+ std::fprintf(stderr, "\n");
+}
+
+void PCHReader::InitializeSema(Sema &S) {
+ SemaObj = &S;
+ S.ExternalSource = this;
+
+ // Makes sure any declarations that were deserialized "too early"
+ // still get added to the identifier's declaration chains.
+ if (SemaObj->TUScope) {
+ for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) {
+ SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(PreloadedDecls[I]));
+ SemaObj->IdResolver.AddDecl(PreloadedDecls[I]);
+ }
+ }
+ PreloadedDecls.clear();
+
+ // If there were any tentative definitions, deserialize them and add
+ // them to Sema's list of tentative definitions.
+ for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
+ VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I]));
+ SemaObj->TentativeDefinitions.push_back(Var);
+ }
+
+ // If there were any unused file scoped decls, deserialize them and add to
+ // Sema's list of unused file scoped decls.
+ for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
+ DeclaratorDecl *D = cast<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
+ SemaObj->UnusedFileScopedDecls.push_back(D);
+ }
+
+ // If there were any weak undeclared identifiers, deserialize them and add to
+ // Sema's list of weak undeclared identifiers.
+ if (!WeakUndeclaredIdentifiers.empty()) {
+ unsigned Idx = 0;
+ for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) {
+ IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx);
+ IdentifierInfo *AliasId=GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx);
+ SourceLocation Loc = ReadSourceLocation(WeakUndeclaredIdentifiers, Idx);
+ bool Used = WeakUndeclaredIdentifiers[Idx++];
+ Sema::WeakInfo WI(AliasId, Loc);
+ WI.setUsed(Used);
+ SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI));
+ }
+ }
+
+ // If there were any locally-scoped external declarations,
+ // deserialize them and add them to Sema's table of locally-scoped
+ // external declarations.
+ for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) {
+ NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I]));
+ SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D;
+ }
+
+ // If there were any ext_vector type declarations, deserialize them
+ // and add them to Sema's vector of such declarations.
+ for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I)
+ SemaObj->ExtVectorDecls.push_back(
+ cast<TypedefDecl>(GetDecl(ExtVectorDecls[I])));
+
+ // FIXME: Do VTable uses and dynamic classes deserialize too much ?
+ // Can we cut them down before writing them ?
+
+ // If there were any VTable uses, deserialize the information and add it
+ // to Sema's vector and map of VTable uses.
+ if (!VTableUses.empty()) {
+ unsigned Idx = 0;
+ for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) {
+ CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
+ SourceLocation Loc = ReadSourceLocation(VTableUses, Idx);
+ bool DefinitionRequired = VTableUses[Idx++];
+ SemaObj->VTableUses.push_back(std::make_pair(Class, Loc));
+ SemaObj->VTablesUsed[Class] = DefinitionRequired;
+ }
+ }
+
+ // If there were any dynamic classes declarations, deserialize them
+ // and add them to Sema's vector of such declarations.
+ for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I)
+ SemaObj->DynamicClasses.push_back(
+ cast<CXXRecordDecl>(GetDecl(DynamicClasses[I])));
+
+ // If there were any pending implicit instantiations, deserialize them
+ // and add them to Sema's queue of such instantiations.
+ assert(PendingImplicitInstantiations.size() % 2 == 0 &&
+ "Expected pairs of entries");
+ for (unsigned Idx = 0, N = PendingImplicitInstantiations.size(); Idx < N;) {
+ ValueDecl *D=cast<ValueDecl>(GetDecl(PendingImplicitInstantiations[Idx++]));
+ SourceLocation Loc = ReadSourceLocation(PendingImplicitInstantiations, Idx);
+ SemaObj->PendingImplicitInstantiations.push_back(std::make_pair(D, Loc));
+ }
+
+ // Load the offsets of the declarations that Sema references.
+ // They will be lazily deserialized when needed.
+ if (!SemaDeclRefs.empty()) {
+ assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!");
+ SemaObj->StdNamespace = SemaDeclRefs[0];
+ SemaObj->StdBadAlloc = SemaDeclRefs[1];
+ }
+
+ // If there are @selector references added them to its pool. This is for
+ // implementation of -Wselector.
+ if (!ReferencedSelectorsData.empty()) {
+ unsigned int DataSize = ReferencedSelectorsData.size()-1;
+ unsigned I = 0;
+ while (I < DataSize) {
+ Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
+ SourceLocation SelLoc =
+ SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
+ SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc));
+ }
+ }
+}
+
+IdentifierInfo* PCHReader::get(const char *NameStart, const char *NameEnd) {
+ // Try to find this name within our on-disk hash tables. We start with the
+ // most recent one, since that one contains the most up-to-date info.
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PCHIdentifierLookupTable *IdTable
+ = (PCHIdentifierLookupTable *)Chain[I]->IdentifierLookupTable;
+ if (!IdTable)
+ continue;
+ std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart);
+ PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key);
+ if (Pos == IdTable->end())
+ continue;
+
+ // Dereferencing the iterator has the effect of building the
+ // IdentifierInfo node and populating it with the various
+ // declarations it needs.
+ return *Pos;
+ }
+ return 0;
+}
+
+std::pair<ObjCMethodList, ObjCMethodList>
+PCHReader::ReadMethodPool(Selector Sel) {
+ // Find this selector in a hash table. We want to find the most recent entry.
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PerFileData &F = *Chain[I];
+ if (!F.SelectorLookupTable)
+ continue;
+
+ PCHSelectorLookupTable *PoolTable
+ = (PCHSelectorLookupTable*)F.SelectorLookupTable;
+ PCHSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
+ if (Pos != PoolTable->end()) {
+ ++NumSelectorsRead;
+ // FIXME: Not quite happy with the statistics here. We probably should
+ // disable this tracking when called via LoadSelector.
+ // Also, should entries without methods count as misses?
+ ++NumMethodPoolEntriesRead;
+ PCHSelectorLookupTrait::data_type Data = *Pos;
+ if (DeserializationListener)
+ DeserializationListener->SelectorRead(Data.ID, Sel);
+ return std::make_pair(Data.Instance, Data.Factory);
+ }
+ }
+
+ ++NumMethodPoolMisses;
+ return std::pair<ObjCMethodList, ObjCMethodList>();
+}
+
+void PCHReader::LoadSelector(Selector Sel) {
+ // It would be complicated to avoid reading the methods anyway. So don't.
+ ReadMethodPool(Sel);
+}
+
+void PCHReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) {
+ assert(ID && "Non-zero identifier ID required");
+ assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range");
+ IdentifiersLoaded[ID - 1] = II;
+ if (DeserializationListener)
+ DeserializationListener->IdentifierRead(ID, II);
+}
+
+/// \brief Set the globally-visible declarations associated with the given
+/// identifier.
+///
+/// If the PCH reader is currently in a state where the given declaration IDs
+/// cannot safely be resolved, they are queued until it is safe to resolve
+/// them.
+///
+/// \param II an IdentifierInfo that refers to one or more globally-visible
+/// declarations.
+///
+/// \param DeclIDs the set of declaration IDs with the name @p II that are
+/// visible at global scope.
+///
+/// \param Nonrecursive should be true to indicate that the caller knows that
+/// this call is non-recursive, and therefore the globally-visible declarations
+/// will not be placed onto the pending queue.
+void
+PCHReader::SetGloballyVisibleDecls(IdentifierInfo *II,
+ const llvm::SmallVectorImpl<uint32_t> &DeclIDs,
+ bool Nonrecursive) {
+ if (NumCurrentElementsDeserializing && !Nonrecursive) {
+ PendingIdentifierInfos.push_back(PendingIdentifierInfo());
+ PendingIdentifierInfo &PII = PendingIdentifierInfos.back();
+ PII.II = II;
+ for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I)
+ PII.DeclIDs.push_back(DeclIDs[I]);
+ return;
+ }
+
+ for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
+ NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
+ if (SemaObj) {
+ if (SemaObj->TUScope) {
+ // Introduce this declaration into the translation-unit scope
+ // and add it to the declaration chain for this identifier, so
+ // that (unqualified) name lookup will find it.
+ SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(D));
+ SemaObj->IdResolver.AddDeclToIdentifierChain(II, D);
+ }
+ } else {
+ // Queue this declaration so that it will be added to the
+ // translation unit scope and identifier's declaration chain
+ // once a Sema object is known.
+ PreloadedDecls.push_back(D);
+ }
+ }
+}
+
+IdentifierInfo *PCHReader::DecodeIdentifierInfo(unsigned ID) {
+ if (ID == 0)
+ return 0;
+
+ if (IdentifiersLoaded.empty()) {
+ Error("no identifier table in PCH file");
+ return 0;
+ }
+
+ assert(PP && "Forgot to set Preprocessor ?");
+ ID -= 1;
+ if (!IdentifiersLoaded[ID]) {
+ unsigned Index = ID;
+ const char *Str = 0;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PerFileData *F = Chain[N - I - 1];
+ if (Index < F->LocalNumIdentifiers) {
+ uint32_t Offset = F->IdentifierOffsets[Index];
+ Str = F->IdentifierTableData + Offset;
+ break;
+ }
+ Index -= F->LocalNumIdentifiers;
+ }
+ assert(Str && "Broken Chain");
+
+ // All of the strings in the PCH file are preceded by a 16-bit
+ // length. Extract that 16-bit length to avoid having to execute
+ // strlen().
+ // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as
+ // unsigned integers. This is important to avoid integer overflow when
+ // we cast them to 'unsigned'.
+ const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
+ unsigned StrLen = (((unsigned) StrLenPtr[0])
+ | (((unsigned) StrLenPtr[1]) << 8)) - 1;
+ IdentifiersLoaded[ID]
+ = &PP->getIdentifierTable().get(Str, StrLen);
+ if (DeserializationListener)
+ DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]);
+ }
+
+ return IdentifiersLoaded[ID];
+}
+
+void PCHReader::ReadSLocEntry(unsigned ID) {
+ ReadSLocEntryRecord(ID);
+}
+
+Selector PCHReader::DecodeSelector(unsigned ID) {
+ if (ID == 0)
+ return Selector();
+
+ if (ID > SelectorsLoaded.size()) {
+ Error("selector ID out of range in PCH file");
+ return Selector();
+ }
+
+ if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) {
+ // Load this selector from the selector table.
+ unsigned Idx = ID - 1;
+ for (unsigned I = 0, N = Chain.size(); I != N; ++I) {
+ PerFileData &F = *Chain[N - I - 1];
+ if (Idx < F.LocalNumSelectors) {
+ PCHSelectorLookupTrait Trait(*this);
+ SelectorsLoaded[ID - 1] =
+ Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0);
+ if (DeserializationListener)
+ DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]);
+ break;
+ }
+ Idx -= F.LocalNumSelectors;
+ }
+ }
+
+ return SelectorsLoaded[ID - 1];
+}
+
+Selector PCHReader::GetExternalSelector(uint32_t ID) {
+ return DecodeSelector(ID);
+}
+
+uint32_t PCHReader::GetNumExternalSelectors() {
+ // ID 0 (the null selector) is considered an external selector.
+ return getTotalNumSelectors() + 1;
+}
+
+DeclarationName
+PCHReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) {
+ DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++];
+ switch (Kind) {
+ case DeclarationName::Identifier:
+ return DeclarationName(GetIdentifierInfo(Record, Idx));
+
+ case DeclarationName::ObjCZeroArgSelector:
+ case DeclarationName::ObjCOneArgSelector:
+ case DeclarationName::ObjCMultiArgSelector:
+ return DeclarationName(GetSelector(Record, Idx));
+
+ case DeclarationName::CXXConstructorName:
+ return Context->DeclarationNames.getCXXConstructorName(
+ Context->getCanonicalType(GetType(Record[Idx++])));
+
+ case DeclarationName::CXXDestructorName:
+ return Context->DeclarationNames.getCXXDestructorName(
+ Context->getCanonicalType(GetType(Record[Idx++])));
+
+ case DeclarationName::CXXConversionFunctionName:
+ return Context->DeclarationNames.getCXXConversionFunctionName(
+ Context->getCanonicalType(GetType(Record[Idx++])));
+
+ case DeclarationName::CXXOperatorName:
+ return Context->DeclarationNames.getCXXOperatorName(
+ (OverloadedOperatorKind)Record[Idx++]);
+
+ case DeclarationName::CXXLiteralOperatorName:
+ return Context->DeclarationNames.getCXXLiteralOperatorName(
+ GetIdentifierInfo(Record, Idx));
+
+ case DeclarationName::CXXUsingDirective:
+ return DeclarationName::getUsingDirectiveName();
+ }
+
+ // Required to silence GCC warning
+ return DeclarationName();
+}
+
+TemplateName
+PCHReader::ReadTemplateName(const RecordData &Record, unsigned &Idx) {
+ TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++];
+ switch (Kind) {
+ case TemplateName::Template:
+ return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++])));
+
+ case TemplateName::OverloadedTemplate: {
+ unsigned size = Record[Idx++];
+ UnresolvedSet<8> Decls;
+ while (size--)
+ Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++])));
+
+ return Context->getOverloadedTemplateName(Decls.begin(), Decls.end());
+ }
+
+ case TemplateName::QualifiedTemplate: {
+ NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx);
+ bool hasTemplKeyword = Record[Idx++];
+ TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++]));
+ return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template);
+ }
+
+ case TemplateName::DependentTemplate: {
+ NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx);
+ if (Record[Idx++]) // isIdentifier
+ return Context->getDependentTemplateName(NNS,
+ GetIdentifierInfo(Record, Idx));
+ return Context->getDependentTemplateName(NNS,
+ (OverloadedOperatorKind)Record[Idx++]);
+ }
+ }
+
+ assert(0 && "Unhandled template name kind!");
+ return TemplateName();
+}
+
+TemplateArgument
+PCHReader::ReadTemplateArgument(llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record, unsigned &Idx) {
+ switch ((TemplateArgument::ArgKind)Record[Idx++]) {
+ case TemplateArgument::Null:
+ return TemplateArgument();
+ case TemplateArgument::Type:
+ return TemplateArgument(GetType(Record[Idx++]));
+ case TemplateArgument::Declaration:
+ return TemplateArgument(GetDecl(Record[Idx++]));
+ case TemplateArgument::Integral: {
+ llvm::APSInt Value = ReadAPSInt(Record, Idx);
+ QualType T = GetType(Record[Idx++]);
+ return TemplateArgument(Value, T);
+ }
+ case TemplateArgument::Template:
+ return TemplateArgument(ReadTemplateName(Record, Idx));
+ case TemplateArgument::Expression:
+ return TemplateArgument(ReadExpr(DeclsCursor));
+ case TemplateArgument::Pack: {
+ unsigned NumArgs = Record[Idx++];
+ llvm::SmallVector<TemplateArgument, 8> Args;
+ Args.reserve(NumArgs);
+ while (NumArgs--)
+ Args.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx));
+ TemplateArgument TemplArg;
+ TemplArg.setArgumentPack(Args.data(), Args.size(), /*CopyArgs=*/true);
+ return TemplArg;
+ }
+ }
+
+ assert(0 && "Unhandled template argument kind!");
+ return TemplateArgument();
+}
+
+TemplateParameterList *
+PCHReader::ReadTemplateParameterList(const RecordData &Record, unsigned &Idx) {
+ SourceLocation TemplateLoc = ReadSourceLocation(Record, Idx);
+ SourceLocation LAngleLoc = ReadSourceLocation(Record, Idx);
+ SourceLocation RAngleLoc = ReadSourceLocation(Record, Idx);
+
+ unsigned NumParams = Record[Idx++];
+ llvm::SmallVector<NamedDecl *, 16> Params;
+ Params.reserve(NumParams);
+ while (NumParams--)
+ Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++])));
+
+ TemplateParameterList* TemplateParams =
+ TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc,
+ Params.data(), Params.size(), RAngleLoc);
+ return TemplateParams;
+}
+
+void
+PCHReader::
+ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs,
+ llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record, unsigned &Idx) {
+ unsigned NumTemplateArgs = Record[Idx++];
+ TemplArgs.reserve(NumTemplateArgs);
+ while (NumTemplateArgs--)
+ TemplArgs.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx));
+}
+
+/// \brief Read a UnresolvedSet structure.
+void PCHReader::ReadUnresolvedSet(UnresolvedSetImpl &Set,
+ const RecordData &Record, unsigned &Idx) {
+ unsigned NumDecls = Record[Idx++];
+ while (NumDecls--) {
+ NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++]));
+ AccessSpecifier AS = (AccessSpecifier)Record[Idx++];
+ Set.addDecl(D, AS);
+ }
+}
+
+CXXBaseSpecifier
+PCHReader::ReadCXXBaseSpecifier(llvm::BitstreamCursor &DeclsCursor,
+ const RecordData &Record, unsigned &Idx) {
+ bool isVirtual = static_cast<bool>(Record[Idx++]);
+ bool isBaseOfClass = static_cast<bool>(Record[Idx++]);
+ AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]);
+ TypeSourceInfo *TInfo = GetTypeSourceInfo(DeclsCursor, Record, Idx);
+ SourceRange Range = ReadSourceRange(Record, Idx);
+ return CXXBaseSpecifier(Range, isVirtual, isBaseOfClass, AS, TInfo);
+}
+
+std::pair<CXXBaseOrMemberInitializer **, unsigned>
+PCHReader::ReadCXXBaseOrMemberInitializers(llvm::BitstreamCursor &Cursor,
+ const RecordData &Record,
+ unsigned &Idx) {
+ CXXBaseOrMemberInitializer **BaseOrMemberInitializers = 0;
+ unsigned NumInitializers = Record[Idx++];
+ if (NumInitializers) {
+ ASTContext &C = *getContext();
+
+ BaseOrMemberInitializers
+ = new (C) CXXBaseOrMemberInitializer*[NumInitializers];
+ for (unsigned i=0; i != NumInitializers; ++i) {
+ TypeSourceInfo *BaseClassInfo = 0;
+ bool IsBaseVirtual = false;
+ FieldDecl *Member = 0;
+
+ bool IsBaseInitializer = Record[Idx++];
+ if (IsBaseInitializer) {
+ BaseClassInfo = GetTypeSourceInfo(Cursor, Record, Idx);
+ IsBaseVirtual = Record[Idx++];
+ } else {
+ Member = cast<FieldDecl>(GetDecl(Record[Idx++]));
+ }
+ SourceLocation MemberLoc = ReadSourceLocation(Record, Idx);
+ Expr *Init = ReadExpr(Cursor);
+ FieldDecl *AnonUnionMember
+ = cast_or_null<FieldDecl>(GetDecl(Record[Idx++]));
+ SourceLocation LParenLoc = ReadSourceLocation(Record, Idx);
+ SourceLocation RParenLoc = ReadSourceLocation(Record, Idx);
+ bool IsWritten = Record[Idx++];
+ unsigned SourceOrderOrNumArrayIndices;
+ llvm::SmallVector<VarDecl *, 8> Indices;
+ if (IsWritten) {
+ SourceOrderOrNumArrayIndices = Record[Idx++];
+ } else {
+ SourceOrderOrNumArrayIndices = Record[Idx++];
+ Indices.reserve(SourceOrderOrNumArrayIndices);
+ for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i)
+ Indices.push_back(cast<VarDecl>(GetDecl(Record[Idx++])));
+ }
+
+ CXXBaseOrMemberInitializer *BOMInit;
+ if (IsBaseInitializer) {
+ BOMInit = new (C) CXXBaseOrMemberInitializer(C, BaseClassInfo,
+ IsBaseVirtual, LParenLoc,
+ Init, RParenLoc);
+ } else if (IsWritten) {
+ BOMInit = new (C) CXXBaseOrMemberInitializer(C, Member, MemberLoc,
+ LParenLoc, Init, RParenLoc);
+ } else {
+ BOMInit = CXXBaseOrMemberInitializer::Create(C, Member, MemberLoc,
+ LParenLoc, Init, RParenLoc,
+ Indices.data(),
+ Indices.size());
+ }
+
+ BOMInit->setAnonUnionMember(AnonUnionMember);
+ BaseOrMemberInitializers[i] = BOMInit;
+ }
+ }
+
+ return std::make_pair(BaseOrMemberInitializers, NumInitializers);
+}
+
+NestedNameSpecifier *
+PCHReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) {
+ unsigned N = Record[Idx++];
+ NestedNameSpecifier *NNS = 0, *Prev = 0;
+ for (unsigned I = 0; I != N; ++I) {
+ NestedNameSpecifier::SpecifierKind Kind
+ = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
+ switch (Kind) {
+ case NestedNameSpecifier::Identifier: {
+ IdentifierInfo *II = GetIdentifierInfo(Record, Idx);
+ NNS = NestedNameSpecifier::Create(*Context, Prev, II);
+ break;
+ }
+
+ case NestedNameSpecifier::Namespace: {
+ NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++]));
+ NNS = NestedNameSpecifier::Create(*Context, Prev, NS);
+ break;
+ }
+
+ case NestedNameSpecifier::TypeSpec:
+ case NestedNameSpecifier::TypeSpecWithTemplate: {
+ Type *T = GetType(Record[Idx++]).getTypePtr();
+ bool Template = Record[Idx++];
+ NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T);
+ break;
+ }
+
+ case NestedNameSpecifier::Global: {
+ NNS = NestedNameSpecifier::GlobalSpecifier(*Context);
+ // No associated value, and there can't be a prefix.
+ break;
+ }
+ }
+ Prev = NNS;
+ }
+ return NNS;
+}
+
+SourceRange
+PCHReader::ReadSourceRange(const RecordData &Record, unsigned &Idx) {
+ SourceLocation beg = SourceLocation::getFromRawEncoding(Record[Idx++]);
+ SourceLocation end = SourceLocation::getFromRawEncoding(Record[Idx++]);
+ return SourceRange(beg, end);
+}
+
+/// \brief Read an integral value
+llvm::APInt PCHReader::ReadAPInt(const RecordData &Record, unsigned &Idx) {
+ unsigned BitWidth = Record[Idx++];
+ unsigned NumWords = llvm::APInt::getNumWords(BitWidth);
+ llvm::APInt Result(BitWidth, NumWords, &Record[Idx]);
+ Idx += NumWords;
+ return Result;
+}
+
+/// \brief Read a signed integral value
+llvm::APSInt PCHReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) {
+ bool isUnsigned = Record[Idx++];
+ return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned);
+}
+
+/// \brief Read a floating-point value
+llvm::APFloat PCHReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) {
+ return llvm::APFloat(ReadAPInt(Record, Idx));
+}
+
+// \brief Read a string
+std::string PCHReader::ReadString(const RecordData &Record, unsigned &Idx) {
+ unsigned Len = Record[Idx++];
+ std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
+ Idx += Len;
+ return Result;
+}
+
+CXXTemporary *PCHReader::ReadCXXTemporary(const RecordData &Record,
+ unsigned &Idx) {
+ CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++]));
+ return CXXTemporary::Create(*Context, Decl);
+}
+
+DiagnosticBuilder PCHReader::Diag(unsigned DiagID) {
+ return Diag(SourceLocation(), DiagID);
+}
+
+DiagnosticBuilder PCHReader::Diag(SourceLocation Loc, unsigned DiagID) {
+ return Diags.Report(FullSourceLoc(Loc, SourceMgr), DiagID);
+}
+
+/// \brief Retrieve the identifier table associated with the
+/// preprocessor.
+IdentifierTable &PCHReader::getIdentifierTable() {
+ assert(PP && "Forgot to set Preprocessor ?");
+ return PP->getIdentifierTable();
+}
+
+/// \brief Record that the given ID maps to the given switch-case
+/// statement.
+void PCHReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
+ assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID");
+ SwitchCaseStmts[ID] = SC;
+}
+
+/// \brief Retrieve the switch-case statement with the given ID.
+SwitchCase *PCHReader::getSwitchCaseWithID(unsigned ID) {
+ assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID");
+ return SwitchCaseStmts[ID];
+}
+
+/// \brief Record that the given label statement has been
+/// deserialized and has the given ID.
+void PCHReader::RecordLabelStmt(LabelStmt *S, unsigned ID) {
+ assert(LabelStmts.find(ID) == LabelStmts.end() &&
+ "Deserialized label twice");
+ LabelStmts[ID] = S;
+
+ // If we've already seen any goto statements that point to this
+ // label, resolve them now.
+ typedef std::multimap<unsigned, GotoStmt *>::iterator GotoIter;
+ std::pair<GotoIter, GotoIter> Gotos = UnresolvedGotoStmts.equal_range(ID);
+ for (GotoIter Goto = Gotos.first; Goto != Gotos.second; ++Goto)
+ Goto->second->setLabel(S);
+ UnresolvedGotoStmts.erase(Gotos.first, Gotos.second);
+
+ // If we've already seen any address-label statements that point to
+ // this label, resolve them now.
+ typedef std::multimap<unsigned, AddrLabelExpr *>::iterator AddrLabelIter;
+ std::pair<AddrLabelIter, AddrLabelIter> AddrLabels
+ = UnresolvedAddrLabelExprs.equal_range(ID);
+ for (AddrLabelIter AddrLabel = AddrLabels.first;
+ AddrLabel != AddrLabels.second; ++AddrLabel)
+ AddrLabel->second->setLabel(S);
+ UnresolvedAddrLabelExprs.erase(AddrLabels.first, AddrLabels.second);
+}
+
+/// \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 it may queue the
+/// statement to be back-patched later.
+void PCHReader::SetLabelOf(GotoStmt *S, unsigned ID) {
+ std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID);
+ if (Label != LabelStmts.end()) {
+ // We've already seen this label, so set the label of the goto and
+ // we're done.
+ S->setLabel(Label->second);
+ } else {
+ // We haven't seen this label yet, so add this goto to the set of
+ // unresolved goto statements.
+ UnresolvedGotoStmts.insert(std::make_pair(ID, S));
+ }
+}
+
+/// \brief Set the label of the given expression 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 it may queue the
+/// statement to be back-patched later.
+void PCHReader::SetLabelOf(AddrLabelExpr *S, unsigned ID) {
+ std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID);
+ if (Label != LabelStmts.end()) {
+ // We've already seen this label, so set the label of the
+ // label-address expression and we're done.
+ S->setLabel(Label->second);
+ } else {
+ // We haven't seen this label yet, so add this label-address
+ // expression to the set of unresolved label-address expressions.
+ UnresolvedAddrLabelExprs.insert(std::make_pair(ID, S));
+ }
+}
+
+void PCHReader::FinishedDeserializing() {
+ assert(NumCurrentElementsDeserializing &&
+ "FinishedDeserializing not paired with StartedDeserializing");
+ if (NumCurrentElementsDeserializing == 1) {
+ // If any identifiers with corresponding top-level declarations have
+ // been loaded, load those declarations now.
+ while (!PendingIdentifierInfos.empty()) {
+ SetGloballyVisibleDecls(PendingIdentifierInfos.front().II,
+ PendingIdentifierInfos.front().DeclIDs, true);
+ PendingIdentifierInfos.pop_front();
+ }
+
+ // We are not in recursive loading, so it's safe to pass the "interesting"
+ // decls to the consumer.
+ if (Consumer)
+ PassInterestingDeclsToConsumer();
+ }
+ --NumCurrentElementsDeserializing;
+}