Factor the Module and ModuleManager classes out into separate headers
and .cpp files, since ASTReader.cpp was getting way too large. No
functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@138582 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTReaderInternals.h b/lib/Serialization/ASTReaderInternals.h
new file mode 100644
index 0000000..14ff744
--- /dev/null
+++ b/lib/Serialization/ASTReaderInternals.h
@@ -0,0 +1,243 @@
+//===--- ASTReaderInternals.h - AST Reader Internals ------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides internal definitions used in the AST reader.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CLANG_SERIALIZATION_ASTREADER_INTERNALS_H
+#define LLVM_CLANG_SERIALIZATION_ASTREADER_INTERNALS_H
+
+#include "clang/Basic/OnDiskHashTable.h"
+#include "clang/AST/DeclarationName.h"
+#include <utility>
+#include <sys/stat.h>
+
+namespace clang {
+
+class ASTReader;
+class HeaderSearch;
+struct HeaderFileInfo;
+
+namespace serialization {
+
+class Module;
+
+namespace reader {
+
+/// \brief Class that performs name lookup into a DeclContext stored
+/// in an AST file.
+class ASTDeclContextNameLookupTrait {
+ ASTReader &Reader;
+ Module &F;
+
+public:
+ /// \brief Pair of begin/end iterators for DeclIDs.
+ ///
+ /// Note that these declaration IDs are local to the module that contains this
+ /// particular lookup t
+ typedef std::pair<DeclID *, DeclID *> data_type;
+
+ /// \brief Special internal key for declaration names.
+ /// The hash table creates keys for comparison; we do not create
+ /// a DeclarationName for the internal key to avoid deserializing types.
+ struct DeclNameKey {
+ DeclarationName::NameKind Kind;
+ uint64_t Data;
+ DeclNameKey() : Kind((DeclarationName::NameKind)0), Data(0) { }
+ };
+
+ typedef DeclarationName external_key_type;
+ typedef DeclNameKey internal_key_type;
+
+ explicit ASTDeclContextNameLookupTrait(ASTReader &Reader,
+ Module &F)
+ : Reader(Reader), F(F) { }
+
+ static bool EqualKey(const internal_key_type& a,
+ const internal_key_type& b) {
+ return a.Kind == b.Kind && a.Data == b.Data;
+ }
+
+ unsigned ComputeHash(const DeclNameKey &Key) const;
+ internal_key_type GetInternalKey(const external_key_type& Name) const;
+ external_key_type GetExternalKey(const internal_key_type& Key) const;
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d);
+
+ internal_key_type ReadKey(const unsigned char* d, unsigned);
+
+ data_type ReadData(internal_key_type, const unsigned char* d,
+ unsigned DataLen);
+};
+
+/// \brief The on-disk hash table used for the DeclContext's Name lookup table.
+typedef OnDiskChainedHashTable<ASTDeclContextNameLookupTrait>
+ ASTDeclContextNameLookupTable;
+
+/// \brief Class that performs lookup for an identifier stored in an AST file.
+class ASTIdentifierLookupTrait {
+ ASTReader &Reader;
+ Module &F;
+
+ // 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 AST 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;
+
+ ASTIdentifierLookupTrait(ASTReader &Reader, Module &F,
+ IdentifierInfo *II = 0)
+ : Reader(Reader), F(F), 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);
+
+ // This hopefully will just get inlined and removed by the optimizer.
+ static const internal_key_type&
+ GetInternalKey(const external_key_type& x) { return x; }
+
+ // This hopefully will just get inlined and removed by the optimizer.
+ static const external_key_type&
+ GetExternalKey(const internal_key_type& x) { return x; }
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d);
+
+ static std::pair<const char*, unsigned>
+ ReadKey(const unsigned char* d, unsigned n);
+
+ IdentifierInfo *ReadData(const internal_key_type& k,
+ const unsigned char* d,
+ unsigned DataLen);
+};
+
+/// \brief The on-disk hash table used to contain information about
+/// all of the identifiers in the program.
+typedef OnDiskChainedHashTable<ASTIdentifierLookupTrait>
+ ASTIdentifierLookupTable;
+
+/// \brief Class that performs lookup for a selector's entries in the global
+/// method pool stored in an AST file.
+class ASTSelectorLookupTrait {
+ ASTReader &Reader;
+ Module &F;
+
+public:
+ struct data_type {
+ SelectorID ID;
+ llvm::SmallVector<ObjCMethodDecl *, 2> Instance;
+ llvm::SmallVector<ObjCMethodDecl *, 2> Factory;
+ };
+
+ typedef Selector external_key_type;
+ typedef external_key_type internal_key_type;
+
+ ASTSelectorLookupTrait(ASTReader &Reader, Module &F)
+ : Reader(Reader), F(F) { }
+
+ static bool EqualKey(const internal_key_type& a,
+ const internal_key_type& b) {
+ return a == b;
+ }
+
+ static unsigned ComputeHash(Selector Sel);
+
+ static const internal_key_type&
+ GetInternalKey(const external_key_type& x) { return x; };
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d);
+
+ internal_key_type ReadKey(const unsigned char* d, unsigned);
+ data_type ReadData(Selector, const unsigned char* d, unsigned DataLen);
+};
+
+/// \brief The on-disk hash table used for the global method pool.
+typedef OnDiskChainedHashTable<ASTSelectorLookupTrait>
+ ASTSelectorLookupTable;
+
+/// \brief Trait class used to search the on-disk hash table containing all of
+/// the header search information.
+///
+/// The on-disk hash table contains a mapping from each header path to
+/// information about that header (how many times it has been included, its
+/// controlling macro, etc.). Note that we actually hash based on the
+/// filename, and support "deep" comparisons of file names based on current
+/// inode numbers, so that the search can cope with non-normalized path names
+/// and symlinks.
+class HeaderFileInfoTrait {
+ ASTReader &Reader;
+ Module &M;
+ HeaderSearch *HS;
+ const char *FrameworkStrings;
+ const char *SearchPath;
+ struct stat SearchPathStatBuf;
+ llvm::Optional<int> SearchPathStatResult;
+
+ int StatSimpleCache(const char *Path, struct stat *StatBuf) {
+ if (Path == SearchPath) {
+ if (!SearchPathStatResult)
+ SearchPathStatResult = stat(Path, &SearchPathStatBuf);
+
+ *StatBuf = SearchPathStatBuf;
+ return *SearchPathStatResult;
+ }
+
+ return stat(Path, StatBuf);
+ }
+
+public:
+ typedef const char *external_key_type;
+ typedef const char *internal_key_type;
+
+ typedef HeaderFileInfo data_type;
+
+ HeaderFileInfoTrait(ASTReader &Reader, Module &M, HeaderSearch *HS,
+ const char *FrameworkStrings,
+ const char *SearchPath = 0)
+ : Reader(Reader), M(M), HS(HS), FrameworkStrings(FrameworkStrings),
+ SearchPath(SearchPath) { }
+
+ static unsigned ComputeHash(const char *path);
+ static internal_key_type GetInternalKey(const char *path);
+ bool EqualKey(internal_key_type a, internal_key_type b);
+
+ static std::pair<unsigned, unsigned>
+ ReadKeyDataLength(const unsigned char*& d);
+
+ static internal_key_type ReadKey(const unsigned char *d, unsigned) {
+ return (const char *)d;
+ }
+
+ data_type ReadData(const internal_key_type, const unsigned char *d,
+ unsigned DataLen);
+};
+
+/// \brief The on-disk hash table used for known header files.
+typedef OnDiskChainedHashTable<HeaderFileInfoTrait>
+ HeaderFileInfoLookupTable;
+
+} // end namespace clang::serialization::reader
+} // end namespace clang::serialization
+} // end namespace clang
+
+
+#endif