move IdentifierTable.h from liblex to libbasic.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42730 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 374 deletions

diff --git a/Lex/IdentifierTable.cpp b/Lex/IdentifierTable.cpp
deleted file mode 100644
index c4c1ee358d..0000000000
--- a/Lex/IdentifierTable.cpp
+++ /dev/null
@@ -1,374 +0,0 @@
-//===--- IdentifierTable.cpp - Hash table for identifier lookup -----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the IdentifierInfo, IdentifierVisitor, and
-// IdentifierTable interfaces.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Lex/IdentifierTable.h"
-#include "clang/Basic/LangOptions.h"
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/DenseMap.h"
-using namespace clang;
-
-//===----------------------------------------------------------------------===//
-// IdentifierInfo Implementation
-//===----------------------------------------------------------------------===//
-
-IdentifierInfo::IdentifierInfo() {
-  TokenID = tok::identifier;
-  ObjCID = tok::objc_not_keyword;
-  BuiltinID = 0;
-  HasMacro = false;
-  IsExtension = false;
-  IsPoisoned = false;
-  IsOtherTargetMacro = false;
-  IsCPPOperatorKeyword = false;
-  IsNonPortableBuiltin = false;
-  FETokenInfo = 0;
-}
-
-//===----------------------------------------------------------------------===//
-// IdentifierTable Implementation
-//===----------------------------------------------------------------------===//
-
-IdentifierTable::IdentifierTable(const LangOptions &LangOpts)
-  // Start with space for 8K identifiers.
-  : HashTable(8192) {
-
-  // Populate the identifier table with info about keywords for the current
-  // language.
-  AddKeywords(LangOpts);
-}
-
-//===----------------------------------------------------------------------===//
-// Language Keyword Implementation
-//===----------------------------------------------------------------------===//
-
-/// AddKeyword - This method is used to associate a token ID with specific
-/// identifiers because they are language keywords.  This causes the lexer to
-/// automatically map matching identifiers to specialized token codes.
-///
-/// The C90/C99/CPP/CPP0x flags are set to 0 if the token should be
-/// enabled in the specified langauge, set to 1 if it is an extension
-/// in the specified language, and set to 2 if disabled in the
-/// specified language.
-static void AddKeyword(const char *Keyword, unsigned KWLen,
-                       tok::TokenKind TokenCode,
-                       int C90, int C99, int CXX, int CXX0x,
-                       const LangOptions &LangOpts, IdentifierTable &Table) {
-  int Flags = LangOpts.CPlusPlus ? (LangOpts.CPlusPlus0x? CXX0x : CXX)
-                                 : (LangOpts.C99 ? C99 : C90);
-  
-  // Don't add this keyword if disabled in this language or if an extension
-  // and extensions are disabled.
-  if (Flags + LangOpts.NoExtensions >= 2) return;
-  
-  IdentifierInfo &Info = Table.get(Keyword, Keyword+KWLen);
-  Info.setTokenID(TokenCode);
-  Info.setIsExtensionToken(Flags == 1);
-}
-
-static void AddAlias(const char *Keyword, unsigned KWLen,
-                     const char *AliaseeKeyword, unsigned AliaseeKWLen,
-                     const LangOptions &LangOpts, IdentifierTable &Table) {
-  IdentifierInfo &AliasInfo = Table.get(Keyword, Keyword+KWLen);
-  IdentifierInfo &AliaseeInfo = Table.get(AliaseeKeyword,
-                                          AliaseeKeyword+AliaseeKWLen);
-  AliasInfo.setTokenID(AliaseeInfo.getTokenID());
-  AliasInfo.setIsExtensionToken(AliaseeInfo.isExtensionToken());
-}  
-
-/// AddCXXOperatorKeyword - Register a C++ operator keyword alternative
-/// representations.
-static void AddCXXOperatorKeyword(const char *Keyword, unsigned KWLen,
-                                  tok::TokenKind TokenCode,
-                                  IdentifierTable &Table) {
-  IdentifierInfo &Info = Table.get(Keyword, Keyword + KWLen);
-  Info.setTokenID(TokenCode);
-  Info.setIsCPlusplusOperatorKeyword();
-}
-
-/// AddObjCKeyword - Register an Objective-C @keyword like "class" "selector" or 
-/// "property".
-static void AddObjCKeyword(tok::ObjCKeywordKind ObjCID, 
-                           const char *Name, unsigned NameLen,
-                           IdentifierTable &Table) {
-  Table.get(Name, Name+NameLen).setObjCKeywordID(ObjCID);
-}
-
-/// AddKeywords - Add all keywords to the symbol table.
-///
-void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
-  enum {
-    C90Shift = 0,
-    EXTC90   = 1 << C90Shift,
-    NOTC90   = 2 << C90Shift,
-    C99Shift = 2,
-    EXTC99   = 1 << C99Shift,
-    NOTC99   = 2 << C99Shift,
-    CPPShift = 4,
-    EXTCPP   = 1 << CPPShift,
-    NOTCPP   = 2 << CPPShift,
-    CPP0xShift = 6,
-    EXTCPP0x   = 1 << CPP0xShift,
-    NOTCPP0x   = 2 << CPP0xShift,
-    Mask     = 3
-  };
-  
-  // Add keywords and tokens for the current language.
-#define KEYWORD(NAME, FLAGS) \
-  AddKeyword(#NAME, strlen(#NAME), tok::kw_ ## NAME,  \
-             ((FLAGS) >> C90Shift) & Mask, \
-             ((FLAGS) >> C99Shift) & Mask, \
-             ((FLAGS) >> CPPShift) & Mask, \
-             ((FLAGS) >> CPP0xShift) & Mask, LangOpts, *this);
-#define ALIAS(NAME, TOK) \
-  AddAlias(NAME, strlen(NAME), #TOK, strlen(#TOK), LangOpts, *this);
-#define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \
-  if (LangOpts.CXXOperatorNames)          \
-    AddCXXOperatorKeyword(#NAME, strlen(#NAME), tok::ALIAS, *this);
-#define OBJC1_AT_KEYWORD(NAME) \
-  if (LangOpts.ObjC1)          \
-    AddObjCKeyword(tok::objc_##NAME, #NAME, strlen(#NAME), *this);
-#define OBJC2_AT_KEYWORD(NAME) \
-  if (LangOpts.ObjC2)          \
-    AddObjCKeyword(tok::objc_##NAME, #NAME, strlen(#NAME), *this);
-#include "clang/Basic/TokenKinds.def"
-}
-
-tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const {
-  // We use a perfect hash function here involving the length of the keyword,
-  // the first and third character.  For preprocessor ID's there are no
-  // collisions (if there were, the switch below would complain about duplicate
-  // case values).  Note that this depends on 'if' being null terminated.
-  
-#define HASH(LEN, FIRST, THIRD) \
-  (LEN << 5) + (((FIRST-'a') + (THIRD-'a')) & 31)
-#define CASE(LEN, FIRST, THIRD, NAME) \
-  case HASH(LEN, FIRST, THIRD): \
-    return memcmp(Name, #NAME, LEN) ? tok::pp_not_keyword : tok::pp_ ## NAME
-    
-  unsigned Len = getLength();
-  const char *Name = getName();
-  switch (HASH(Len, Name[0], Name[2])) {
-  default: return tok::pp_not_keyword;
-  CASE( 2, 'i', '\0', if);
-  CASE( 4, 'e', 'i', elif);
-  CASE( 4, 'e', 's', else);
-  CASE( 4, 'l', 'n', line);
-  CASE( 4, 's', 'c', sccs);
-  CASE( 5, 'e', 'd', endif);
-  CASE( 5, 'e', 'r', error);
-  CASE( 5, 'i', 'e', ident);
-  CASE( 5, 'i', 'd', ifdef);
-  CASE( 5, 'u', 'd', undef);
-
-  CASE( 6, 'a', 's', assert);
-  CASE( 6, 'd', 'f', define);
-  CASE( 6, 'i', 'n', ifndef);
-  CASE( 6, 'i', 'p', import);
-  CASE( 6, 'p', 'a', pragma);
-
-  CASE( 7, 'd', 'f', defined);
-  CASE( 7, 'i', 'c', include);
-  CASE( 7, 'w', 'r', warning);
-
-  CASE( 8, 'u', 'a', unassert);
-  CASE(12, 'i', 'c', include_next);
-  CASE(13, 'd', 'f', define_target);
-  CASE(19, 'd', 'f', define_other_target);
-#undef CASE
-#undef HASH
-  }
-}
-
-//===----------------------------------------------------------------------===//
-// Stats Implementation
-//===----------------------------------------------------------------------===//
-
-/// PrintStats - Print statistics about how well the identifier table is doing
-/// at hashing identifiers.
-void IdentifierTable::PrintStats() const {
-  unsigned NumBuckets = HashTable.getNumBuckets();
-  unsigned NumIdentifiers = HashTable.getNumItems();
-  unsigned NumEmptyBuckets = NumBuckets-NumIdentifiers;
-  unsigned AverageIdentifierSize = 0;
-  unsigned MaxIdentifierLength = 0;
-  
-  // TODO: Figure out maximum times an identifier had to probe for -stats.
-  for (llvm::StringMap<IdentifierInfo, llvm::BumpPtrAllocator>::const_iterator
-       I = HashTable.begin(), E = HashTable.end(); I != E; ++I) {
-    unsigned IdLen = I->getKeyLength();
-    AverageIdentifierSize += IdLen;
-    if (MaxIdentifierLength < IdLen)
-      MaxIdentifierLength = IdLen;
-  }
-  
-  fprintf(stderr, "\n*** Identifier Table Stats:\n");
-  fprintf(stderr, "# Identifiers:   %d\n", NumIdentifiers);
-  fprintf(stderr, "# Empty Buckets: %d\n", NumEmptyBuckets);
-  fprintf(stderr, "Hash density (#identifiers per bucket): %f\n",
-          NumIdentifiers/(double)NumBuckets);
-  fprintf(stderr, "Ave identifier length: %f\n",
-          (AverageIdentifierSize/(double)NumIdentifiers));
-  fprintf(stderr, "Max identifier length: %d\n", MaxIdentifierLength);
-  
-  // Compute statistics about the memory allocated for identifiers.
-  HashTable.getAllocator().PrintStats();
-}
-
-//===----------------------------------------------------------------------===//
-// SelectorTable Implementation
-//===----------------------------------------------------------------------===//
-
-unsigned llvm::DenseMapInfo<clang::Selector>::getHashValue(clang::Selector S) {
-  return DenseMapInfo<void*>::getHashValue(S.getAsOpaquePtr());
-}
-
-
-/// MultiKeywordSelector - One of these variable length records is kept for each
-/// selector containing more than one keyword. We use a folding set
-/// to unique aggregate names (keyword selectors in ObjC parlance). Access to 
-/// this class is provided strictly through Selector.
-namespace clang {
-class MultiKeywordSelector : public llvm::FoldingSetNode {
-public:  
-  unsigned NumArgs;
-
-  // Constructor for keyword selectors.
-  MultiKeywordSelector(unsigned nKeys, IdentifierInfo **IIV) {
-    assert((nKeys > 1) && "not a multi-keyword selector");
-    NumArgs = nKeys;
-    // Fill in the trailing keyword array.
-    IdentifierInfo **KeyInfo = reinterpret_cast<IdentifierInfo **>(this+1);
-    for (unsigned i = 0; i != nKeys; ++i)
-      KeyInfo[i] = IIV[i];
-  }
-  // getName - Derive the full selector name and return it.
-  std::string getName() const;
-    
-  unsigned getNumArgs() const { return NumArgs; }
-  
-  typedef IdentifierInfo *const *keyword_iterator;
-  keyword_iterator keyword_begin() const {
-    return reinterpret_cast<keyword_iterator>(this+1);
-  }
-  keyword_iterator keyword_end() const { 
-    return keyword_begin()+NumArgs; 
-  }
-  IdentifierInfo *getIdentifierInfoForSlot(unsigned i) const {
-    assert(i < NumArgs && "getIdentifierInfoForSlot(): illegal index");
-    return keyword_begin()[i];
-  }
-  static void Profile(llvm::FoldingSetNodeID &ID, 
-                      keyword_iterator ArgTys, unsigned NumArgs) {
-    ID.AddInteger(NumArgs);
-    for (unsigned i = 0; i != NumArgs; ++i)
-      ID.AddPointer(ArgTys[i]);
-  }
-  void Profile(llvm::FoldingSetNodeID &ID) {
-    Profile(ID, keyword_begin(), NumArgs);
-  }
-};
-} // end namespace clang.
-
-unsigned Selector::getNumArgs() const {
-  unsigned IIF = getIdentifierInfoFlag();
-  if (IIF == ZeroArg)
-    return 0;
-  if (IIF == OneArg)
-    return 1;
-  // We point to a MultiKeywordSelector (pointer doesn't contain any flags).
-  MultiKeywordSelector *SI = reinterpret_cast<MultiKeywordSelector *>(InfoPtr);
-  return SI->getNumArgs(); 
-}
-
-IdentifierInfo *Selector::getIdentifierInfoForSlot(unsigned argIndex) const {
-  if (IdentifierInfo *II = getAsIdentifierInfo()) {
-    assert(argIndex == 0 && "illegal keyword index");
-    return II;
-  }
-  // We point to a MultiKeywordSelector (pointer doesn't contain any flags).
-  MultiKeywordSelector *SI = reinterpret_cast<MultiKeywordSelector *>(InfoPtr);
-  return SI->getIdentifierInfoForSlot(argIndex);
-}
-
-std::string MultiKeywordSelector::getName() const {
-  std::string Result;
-  unsigned Length = 0;
-  for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) {
-    if (*I)
-      Length += (*I)->getLength();
-    ++Length;  // :
-  }
-  
-  Result.reserve(Length);
-  
-  for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) {
-    if (*I)
-      Result.insert(Result.end(), (*I)->getName(),
-                    (*I)->getName()+(*I)->getLength());
-    Result.push_back(':');
-  }
-  
-  return Result;
-}
-
-std::string Selector::getName() const {
-  if (IdentifierInfo *II = getAsIdentifierInfo()) {
-    if (getNumArgs() == 0)
-      return II->getName();
-    
-    std::string Res = II->getName();
-    Res += ":";
-    return Res;
-  }
-  
-  // We have a multiple keyword selector (no embedded flags).
-  return reinterpret_cast<MultiKeywordSelector *>(InfoPtr)->getName();
-}
-
-
-Selector SelectorTable::getSelector(unsigned nKeys, IdentifierInfo **IIV) {
-  if (nKeys < 2)
-    return Selector(IIV[0], nKeys);
-  
-  llvm::FoldingSet<MultiKeywordSelector> *SelTab;
-  
-  SelTab = static_cast<llvm::FoldingSet<MultiKeywordSelector> *>(Impl);
-    
-  // Unique selector, to guarantee there is one per name.
-  llvm::FoldingSetNodeID ID;
-  MultiKeywordSelector::Profile(ID, IIV, nKeys);
-
-  void *InsertPos = 0;
-  if (MultiKeywordSelector *SI = SelTab->FindNodeOrInsertPos(ID, InsertPos))
-    return Selector(SI);
-  
-  // MultiKeywordSelector objects are not allocated with new because they have a
-  // variable size array (for parameter types) at the end of them.
-  MultiKeywordSelector *SI = 
-    (MultiKeywordSelector*)malloc(sizeof(MultiKeywordSelector) + 
-                                  nKeys*sizeof(IdentifierInfo *));
-  new (SI) MultiKeywordSelector(nKeys, IIV);
-  SelTab->InsertNode(SI, InsertPos);
-  return Selector(SI);
-}
-
-SelectorTable::SelectorTable() {
-  Impl = new llvm::FoldingSet<MultiKeywordSelector>;
-}
-
-SelectorTable::~SelectorTable() {
-  delete static_cast<llvm::FoldingSet<MultiKeywordSelector> *>(Impl);
-}
-
-