Analyzer moved to ../Reader directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14491 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 1062 deletions

diff --git a/lib/Bytecode/Analyzer/Parser.cpp b/lib/Bytecode/Analyzer/Parser.cpp
deleted file mode 100644
index c79318a02c..0000000000
--- a/lib/Bytecode/Analyzer/Parser.cpp
+++ /dev/null
@@ -1,1062 +0,0 @@
-//===- Parser.cpp - Code to parse bytecode files --------------------------===//
-// 
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
-//===----------------------------------------------------------------------===//
-//
-// This library implements the functionality defined in llvm/Bytecode/Parser.h
-//
-// Note that this library should be as fast as possible, reentrant, and 
-// threadsafe!!
-//
-// TODO: Allow passing in an option to ignore the symbol table
-//
-//===----------------------------------------------------------------------===//
-
-#include "AnalyzerInternals.h"
-#include "llvm/Module.h"
-#include "llvm/Bytecode/Format.h"
-#include "Support/StringExtras.h"
-#include <iostream>
-#include <sstream>
-
-using namespace llvm;
-
-// Enable to trace to figure out what the heck is going on when parsing fails
-//#define TRACE_LEVEL 10
-//#define DEBUG_OUTPUT
-
-#if TRACE_LEVEL    // ByteCodeReading_TRACEr
-#define BCR_TRACE(n, X) \
-    if (n < TRACE_LEVEL) std::cerr << std::string(n*2, ' ') << X
-#else
-#define BCR_TRACE(n, X)
-#endif
-
-#define PARSE_ERROR(inserters) { \
-    std::ostringstream errormsg; \
-    errormsg << inserters; \
-    if ( ! handler->handleError( errormsg.str() ) ) \
-      throw std::string(errormsg.str()); \
-  }
-
-inline bool AbstractBytecodeParser::moreInBlock() {
-  return At < BlockEnd;
-}
-
-inline void AbstractBytecodeParser::checkPastBlockEnd(const char * block_name) {
-  if ( At > BlockEnd )
-    PARSE_ERROR("Attempt to read past the end of " << block_name << " block.");
-}
-
-inline void AbstractBytecodeParser::align32() {
-  BufPtr Save = At;
-  At = (const unsigned char *)((unsigned long)(At+3) & (~3UL));
-  if ( reportAlignment && At > Save ) handler->handleAlignment( At - Save );
-  if (At > BlockEnd) 
-    throw std::string("Ran out of data while aligning!");
-}
-
-inline unsigned AbstractBytecodeParser::read_uint() {
-  if (At+4 > BlockEnd) 
-    throw std::string("Ran out of data reading uint!");
-  At += 4;
-  return At[-4] | (At[-3] << 8) | (At[-2] << 16) | (At[-1] << 24);
-}
-
-inline unsigned AbstractBytecodeParser::read_vbr_uint() {
-  unsigned Shift = 0;
-  unsigned Result = 0;
-  BufPtr Save = At;
-  
-  do {
-    if (At == BlockEnd) 
-      throw std::string("Ran out of data reading vbr_uint!");
-    Result |= (unsigned)((*At++) & 0x7F) << Shift;
-    Shift += 7;
-  } while (At[-1] & 0x80);
-  if (reportVBR)
-    handler->handleVBR32(At-Save);
-  return Result;
-}
-
-inline uint64_t AbstractBytecodeParser::read_vbr_uint64() {
-  unsigned Shift = 0;
-  uint64_t Result = 0;
-  BufPtr Save = At;
-  
-  do {
-    if (At == BlockEnd) 
-      throw std::string("Ran out of data reading vbr_uint64!");
-    Result |= (uint64_t)((*At++) & 0x7F) << Shift;
-    Shift += 7;
-  } while (At[-1] & 0x80);
-  if (reportVBR)
-    handler->handleVBR64(At-Save);
-  return Result;
-}
-
-inline int64_t AbstractBytecodeParser::read_vbr_int64() {
-  uint64_t R = read_vbr_uint64();
-  if (R & 1) {
-    if (R != 1)
-      return -(int64_t)(R >> 1);
-    else   // There is no such thing as -0 with integers.  "-0" really means
-           // 0x8000000000000000.
-      return 1LL << 63;
-  } else
-    return  (int64_t)(R >> 1);
-}
-
-inline std::string AbstractBytecodeParser::read_str() {
-  unsigned Size = read_vbr_uint();
-  const unsigned char *OldAt = At;
-  At += Size;
-  if (At > BlockEnd)             // Size invalid?
-    throw std::string("Ran out of data reading a string!");
-  return std::string((char*)OldAt, Size);
-}
-
-inline void AbstractBytecodeParser::read_data(void *Ptr, void *End) {
-  unsigned char *Start = (unsigned char *)Ptr;
-  unsigned Amount = (unsigned char *)End - Start;
-  if (At+Amount > BlockEnd) 
-    throw std::string("Ran out of data!");
-  std::copy(At, At+Amount, Start);
-  At += Amount;
-}
-
-inline void AbstractBytecodeParser::readBlock(unsigned &Type, unsigned &Size) {
-  Type = read_uint();
-  Size = read_uint();
-  BlockStart = At;
-  if ( At + Size > BlockEnd )
-    throw std::string("Attempt to size a block past end of memory");
-  BlockEnd = At + Size;
-  if ( reportBlocks ) {
-    handler->handleBlock( Type, BlockStart, Size );
-  }
-}
-
-const Type *AbstractBytecodeParser::getType(unsigned ID) {
-//cerr << "Looking up Type ID: " << ID << "\n";
-
-if (ID < Type::FirstDerivedTyID)
-  if (const Type *T = Type::getPrimitiveType((Type::TypeID)ID))
-    return T;   // Asked for a primitive type...
-
-// Otherwise, derived types need offset...
-ID -= Type::FirstDerivedTyID;
-
-if (!CompactionTypeTable.empty()) {
-  if (ID >= CompactionTypeTable.size())
-    PARSE_ERROR("Type ID out of range for compaction table!");
-  return CompactionTypeTable[ID];
-}
-
-// Is it a module-level type?
-  if (ID < ModuleTypes.size())
-    return ModuleTypes[ID].get();
-
-  // Nope, is it a function-level type?
-  ID -= ModuleTypes.size();
-  if (ID < FunctionTypes.size())
-    return FunctionTypes[ID].get();
-
-  PARSE_ERROR("Illegal type reference!");
-  return Type::VoidTy;
-}
-
-bool AbstractBytecodeParser::ParseInstruction(std::vector<unsigned> &Operands) {
-  BufPtr SaveAt = At;
-  Operands.clear();
-  unsigned iType = 0;
-  unsigned Opcode = 0;
-  unsigned Op = read_uint();
-
-  // bits   Instruction format:        Common to all formats
-  // --------------------------
-  // 01-00: Opcode type, fixed to 1.
-  // 07-02: Opcode
-  Opcode    = (Op >> 2) & 63;
-  Operands.resize((Op >> 0) & 03);
-
-  switch (Operands.size()) {
-  case 1:
-    // bits   Instruction format:
-    // --------------------------
-    // 19-08: Resulting type plane
-    // 31-20: Operand #1 (if set to (2^12-1), then zero operands)
-    //
-    iType   = (Op >>  8) & 4095;
-    Operands[0] = (Op >> 20) & 4095;
-    if (Operands[0] == 4095)    // Handle special encoding for 0 operands...
-      Operands.resize(0);
-    break;
-  case 2:
-    // bits   Instruction format:
-    // --------------------------
-    // 15-08: Resulting type plane
-    // 23-16: Operand #1
-    // 31-24: Operand #2  
-    //
-    iType   = (Op >>  8) & 255;
-    Operands[0] = (Op >> 16) & 255;
-    Operands[1] = (Op >> 24) & 255;
-    break;
-  case 3:
-    // bits   Instruction format:
-    // --------------------------
-    // 13-08: Resulting type plane
-    // 19-14: Operand #1
-    // 25-20: Operand #2
-    // 31-26: Operand #3
-    //
-    iType   = (Op >>  8) & 63;
-    Operands[0] = (Op >> 14) & 63;
-    Operands[1] = (Op >> 20) & 63;
-    Operands[2] = (Op >> 26) & 63;
-    break;
-  case 0:
-    At -= 4;  // Hrm, try this again...
-    Opcode = read_vbr_uint();
-    Opcode >>= 2;
-    iType = read_vbr_uint();
-
-    unsigned NumOperands = read_vbr_uint();
-    Operands.resize(NumOperands);
-
-    if (NumOperands == 0)
-      PARSE_ERROR("Zero-argument instruction found; this is invalid.");
-
-    for (unsigned i = 0; i != NumOperands; ++i)
-      Operands[i] = read_vbr_uint();
-    align32();
-    break;
-  }
-
-  return handler->handleInstruction(Opcode, getType(iType), Operands, At-SaveAt);
-}
-
-/// ParseBasicBlock - In LLVM 1.0 bytecode files, we used to output one
-/// basicblock at a time.  This method reads in one of the basicblock packets.
-void AbstractBytecodeParser::ParseBasicBlock( unsigned BlockNo) {
-  handler->handleBasicBlockBegin( BlockNo );
-
-  std::vector<unsigned> Args;
-  bool is_terminating = false;
-  while ( moreInBlock() )
-    is_terminating = ParseInstruction(Args);
-
-  if ( ! is_terminating )
-    PARSE_ERROR("Non-terminated basic block found!");
-
-  handler->handleBasicBlockEnd( BlockNo );
-}
-
-/// ParseInstructionList - Parse all of the BasicBlock's & Instruction's in the
-/// body of a function.  In post 1.0 bytecode files, we no longer emit basic
-/// block individually, in order to avoid per-basic-block overhead.
-unsigned AbstractBytecodeParser::ParseInstructionList() {
-  unsigned BlockNo = 0;
-  std::vector<unsigned> Args;
-
-  while ( moreInBlock() ) {
-    handler->handleBasicBlockBegin( BlockNo );
-
-    // Read instructions into this basic block until we get to a terminator
-    bool is_terminating = false;
-    while (moreInBlock() && !is_terminating )
-        is_terminating = ParseInstruction(Args ) ;
-
-    if (!is_terminating)
-      PARSE_ERROR( "Non-terminated basic block found!");
-
-    handler->handleBasicBlockEnd( BlockNo );
-    ++BlockNo;
-  }
-  return BlockNo;
-}
-
-void AbstractBytecodeParser::ParseSymbolTable() {
-  handler->handleSymbolTableBegin();
-
-  while ( moreInBlock() ) {
-    // Symtab block header: [num entries][type id number]
-    unsigned NumEntries = read_vbr_uint();
-    unsigned Typ = read_vbr_uint();
-    const Type *Ty = getType(Typ);
-
-    handler->handleSymbolTablePlane( Typ, NumEntries, Ty );
-
-    for (unsigned i = 0; i != NumEntries; ++i) {
-      // Symtab entry: [def slot #][name]
-      unsigned slot = read_vbr_uint();
-      std::string Name = read_str();
-
-      if (Typ == Type::TypeTyID)
-        handler->handleSymbolTableType( i, slot, Name );
-      else
-        handler->handleSymbolTableValue( i, slot, Name );
-    }
-  }
-  checkPastBlockEnd("Symbol Table");
-
-  handler->handleSymbolTableEnd();
-}
-
-void AbstractBytecodeParser::ParseFunctionLazily() {
-  if (FunctionSignatureList.empty())
-    throw std::string("FunctionSignatureList empty!");
-
-  Function *Func = FunctionSignatureList.back();
-  FunctionSignatureList.pop_back();
-
-  // Save the information for future reading of the function
-  LazyFunctionLoadMap[Func] = LazyFunctionInfo(BlockStart, BlockEnd);
-
-  // Pretend we've `parsed' this function
-  At = BlockEnd;
-}
-
-void AbstractBytecodeParser::ParseNextFunction(Function* Func) {
-  // Find {start, end} pointers and slot in the map. If not there, we're done.
-  LazyFunctionMap::iterator Fi = LazyFunctionLoadMap.find(Func);
-
-  // Make sure we found it
-  if ( Fi == LazyFunctionLoadMap.end() ) {
-    PARSE_ERROR("Unrecognized function of type " << Func->getType()->getDescription());
-    return;
-  }
-
-  BlockStart = At = Fi->second.Buf;
-  BlockEnd = Fi->second.Buf;
-  assert(Fi->first == Func);
-
-  LazyFunctionLoadMap.erase(Fi);
-
-  this->ParseFunctionBody( Func );
-}
-
-void AbstractBytecodeParser::ParseAllFunctionBodies() {
-  LazyFunctionMap::iterator Fi = LazyFunctionLoadMap.begin();
-  LazyFunctionMap::iterator Fe = LazyFunctionLoadMap.end();
-
-  while ( Fi != Fe ) {
-    Function* Func = Fi->first;
-    BlockStart = At = Fi->second.Buf;
-    BlockEnd = Fi->second.EndBuf;
-    this->ParseFunctionBody(Func);
-    ++Fi;
-  }
-}
-
-void AbstractBytecodeParser::ParseFunctionBody(Function* Func ) {
-
-  unsigned FuncSize = BlockEnd - At;
-  GlobalValue::LinkageTypes Linkage = GlobalValue::ExternalLinkage;
-
-  unsigned LinkageType = read_vbr_uint();
-  switch (LinkageType) {
-  case 0: Linkage = GlobalValue::ExternalLinkage; break;
-  case 1: Linkage = GlobalValue::WeakLinkage; break;
-  case 2: Linkage = GlobalValue::AppendingLinkage; break;
-  case 3: Linkage = GlobalValue::InternalLinkage; break;
-  case 4: Linkage = GlobalValue::LinkOnceLinkage; break;
-  default:
-    PARSE_ERROR("Invalid linkage type for Function.");
-    Linkage = GlobalValue::InternalLinkage;
-    break;
-  }
-
-  Func->setLinkage( Linkage );
-  handler->handleFunctionBegin(Func,FuncSize);
-
-  // Keep track of how many basic blocks we have read in...
-  unsigned BlockNum = 0;
-  bool InsertedArguments = false;
-
-  BufPtr MyEnd = BlockEnd;
-  while ( At < MyEnd ) {
-    unsigned Type, Size;
-    BufPtr OldAt = At;
-    readBlock(Type, Size);
-
-    switch (Type) {
-    case BytecodeFormat::ConstantPool:
-      ParseConstantPool(FunctionTypes );
-      break;
-
-    case BytecodeFormat::CompactionTable:
-      ParseCompactionTable();
-      break;
-
-    case BytecodeFormat::BasicBlock:
-      ParseBasicBlock(BlockNum++);
-      break;
-
-    case BytecodeFormat::InstructionList:
-      if (BlockNum) 
-        PARSE_ERROR("InstructionList must come before basic blocks!");
-      BlockNum = ParseInstructionList();
-      break;
-
-    case BytecodeFormat::SymbolTable:
-      ParseSymbolTable();
-      break;
-
-    default:
-      At += Size;
-      if (OldAt > At)
-        PARSE_ERROR("Wrapped around reading bytecode");
-      break;
-    }
-    BlockEnd = MyEnd;
-
-    // Malformed bc file if read past end of block.
-    align32();
-  }
-
-  handler->handleFunctionEnd(Func);
-
-  // Clear out function-level types...
-  FunctionTypes.clear();
-  CompactionTypeTable.clear();
-}
-
-void AbstractBytecodeParser::ParseCompactionTable() {
-
-  handler->handleCompactionTableBegin();
-
-  while ( moreInBlock() ) {
-    unsigned NumEntries = read_vbr_uint();
-    unsigned Ty;
-
-    if ((NumEntries & 3) == 3) {
-      NumEntries >>= 2;
-      Ty = read_vbr_uint();
-    } else {
-      Ty = NumEntries >> 2;
-      NumEntries &= 3;
-    }
-
-    handler->handleCompactionTablePlane( Ty, NumEntries );
-
-    if (Ty == Type::TypeTyID) {
-      for (unsigned i = 0; i != NumEntries; ++i) {
-        unsigned TypeSlot = read_vbr_uint();
-        const Type *Typ = getGlobalTableType(TypeSlot);
-        handler->handleCompactionTableType( i, TypeSlot, Typ );
-      }
-    } else {
-      const Type *Typ = getType(Ty);
-      // Push the implicit zero
-      for (unsigned i = 0; i != NumEntries; ++i) {
-        unsigned ValSlot = read_vbr_uint();
-        handler->handleCompactionTableValue( i, ValSlot, Typ );
-      }
-    }
-  }
-  handler->handleCompactionTableEnd();
-}
-
-const Type *AbstractBytecodeParser::ParseTypeConstant() {
-  unsigned PrimType = read_vbr_uint();
-
-  const Type *Val = 0;
-  if ((Val = Type::getPrimitiveType((Type::TypeID)PrimType)))
-    return Val;
-  
-  switch (PrimType) {
-  case Type::FunctionTyID: {
-    const Type *RetType = getType(read_vbr_uint());
-
-    unsigned NumParams = read_vbr_uint();
-
-    std::vector<const Type*> Params;
-    while (NumParams--)
-      Params.push_back(getType(read_vbr_uint()));
-
-    bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
-    if (isVarArg) Params.pop_back();
-
-    Type* result = FunctionType::get(RetType, Params, isVarArg);
-    handler->handleType( result );
-    return result;
-  }
-  case Type::ArrayTyID: {
-    unsigned ElTyp = read_vbr_uint();
-    const Type *ElementType = getType(ElTyp);
-
-    unsigned NumElements = read_vbr_uint();
-
-    BCR_TRACE(5, "Array Type Constant #" << ElTyp << " size=" 
-              << NumElements << "\n");
-    Type* result =  ArrayType::get(ElementType, NumElements);
-    handler->handleType( result );
-    return result;
-  }
-  case Type::StructTyID: {
-    std::vector<const Type*> Elements;
-    unsigned Typ = read_vbr_uint();
-    while (Typ) {         // List is terminated by void/0 typeid
-      Elements.push_back(getType(Typ));
-      Typ = read_vbr_uint();
-    }
-
-    Type* result = StructType::get(Elements);
-    handler->handleType( result );
-    return result;
-  }
-  case Type::PointerTyID: {
-    unsigned ElTyp = read_vbr_uint();
-    BCR_TRACE(5, "Pointer Type Constant #" << ElTyp << "\n");
-    Type* result = PointerType::get(getType(ElTyp));
-    handler->handleType( result );
-    return result;
-  }
-
-  case Type::OpaqueTyID: {
-    Type* result = OpaqueType::get();
-    handler->handleType( result );
-    return result;
-  }
-
-  default:
-    PARSE_ERROR("Don't know how to deserialize primitive type" << PrimType << "\n");
-    return Val;
-  }
-}
-
-// ParseTypeConstants - We have to use this weird code to handle recursive
-// types.  We know that recursive types will only reference the current slab of
-// values in the type plane, but they can forward reference types before they
-// have been read.  For example, Type #0 might be '{ Ty#1 }' and Type #1 might
-// be 'Ty#0*'.  When reading Type #0, type number one doesn't exist.  To fix
-// this ugly problem, we pessimistically insert an opaque type for each type we
-// are about to read.  This means that forward references will resolve to
-// something and when we reread the type later, we can replace the opaque type
-// with a new resolved concrete type.
-//
-void AbstractBytecodeParser::ParseTypeConstants( 
-  TypeListTy &Tab, unsigned NumEntries
-) {
-  assert(Tab.size() == 0 && "should not have read type constants in before!");
-
-  // Insert a bunch of opaque types to be resolved later...
-  Tab.reserve(NumEntries);
-  for (unsigned i = 0; i != NumEntries; ++i)
-    Tab.push_back(OpaqueType::get());
-
-  // Loop through reading all of the types.  Forward types will make use of the
-  // opaque types just inserted.
-  //
-  for (unsigned i = 0; i != NumEntries; ++i) {
-    const Type *NewTy = ParseTypeConstant(), *OldTy = Tab[i].get();
-    if (NewTy == 0) throw std::string("Couldn't parse type!");
-    BCR_TRACE(4, "#" << i << ": Read Type Constant: '" << NewTy <<
-              "' Replacing: " << OldTy << "\n");
-
-    // Don't insertValue the new type... instead we want to replace the opaque
-    // type with the new concrete value...
-    //
-
-    // Refine the abstract type to the new type.  This causes all uses of the
-    // abstract type to use NewTy.  This also will cause the opaque type to be
-    // deleted...
-    //
-    cast<DerivedType>(const_cast<Type*>(OldTy))->refineAbstractTypeTo(NewTy);
-
-    // This should have replace the old opaque type with the new type in the
-    // value table... or with a preexisting type that was already in the system
-    assert(Tab[i] != OldTy && "refineAbstractType didn't work!");
-  }
-
-  BCR_TRACE(5, "Resulting types:\n");
-  for (unsigned i = 0; i < NumEntries; ++i) {
-    BCR_TRACE(5, (void*)Tab[i].get() << " - " << Tab[i].get() << "\n");
-  }
-}
-
-
-void AbstractBytecodeParser::ParseConstantValue(unsigned TypeID) {
-
-  // We must check for a ConstantExpr before switching by type because
-  // a ConstantExpr can be of any type, and has no explicit value.
-  // 
-  // 0 if not expr; numArgs if is expr
-  unsigned isExprNumArgs = read_vbr_uint();
-  
-  if (isExprNumArgs) {
-    unsigned Opcode = read_vbr_uint();
-    const Type* Typ = getType(TypeID);
-    
-    // FIXME: Encoding of constant exprs could be much more compact!
-    std::vector<std::pair<const Type*,unsigned> > ArgVec;
-    ArgVec.reserve(isExprNumArgs);
-
-    // Read the slot number and types of each of the arguments
-    for (unsigned i = 0; i != isExprNumArgs; ++i) {
-      unsigned ArgValSlot = read_vbr_uint();
-      unsigned ArgTypeSlot = read_vbr_uint();
-      BCR_TRACE(4, "CE Arg " << i << ": Type: '" << *getType(ArgTypeSlot)
-                << "'  slot: " << ArgValSlot << "\n");
-      
-      // Get the arg value from its slot if it exists, otherwise a placeholder
-      ArgVec.push_back(std::make_pair(getType(ArgTypeSlot), ArgValSlot));
-    }
-
-    handler->handleConstantExpression( Opcode, Typ, ArgVec );
-    return;
-  }
-  
-  // Ok, not an ConstantExpr.  We now know how to read the given type...
-  const Type *Ty = getType(TypeID);
-  switch (Ty->getTypeID()) {
-  case Type::BoolTyID: {
-    unsigned Val = read_vbr_uint();
-    if (Val != 0 && Val != 1) 
-      PARSE_ERROR("Invalid boolean value read.");
-
-    handler->handleConstantValue( ConstantBool::get(Val == 1));
-    break;
-  }
-
-  case Type::UByteTyID:   // Unsigned integer types...
-  case Type::UShortTyID:
-  case Type::UIntTyID: {
-    unsigned Val = read_vbr_uint();
-    if (!ConstantUInt::isValueValidForType(Ty, Val)) 
-      throw std::string("Invalid unsigned byte/short/int read.");
-    handler->handleConstantValue( ConstantUInt::get(Ty, Val) );
-    break;
-  }
-
-  case Type::ULongTyID: {
-    handler->handleConstantValue( ConstantUInt::get(Ty, read_vbr_uint64()) );
-    break;
-  }
-
-  case Type::SByteTyID:   // Signed integer types...
-  case Type::ShortTyID:
-  case Type::IntTyID: {
-  case Type::LongTyID:
-    int64_t Val = read_vbr_int64();
-    if (!ConstantSInt::isValueValidForType(Ty, Val)) 
-      throw std::string("Invalid signed byte/short/int/long read.");
-    handler->handleConstantValue(  ConstantSInt::get(Ty, Val) );
-    break;
-  }
-
-  case Type::FloatTyID: {
-    float F;
-    read_data(&F, &F+1);
-    handler->handleConstantValue( ConstantFP::get(Ty, F) );
-    break;
-  }
-
-  case Type::DoubleTyID: {
-    double Val;
-    read_data(&Val, &Val+1);
-    handler->handleConstantValue( ConstantFP::get(Ty, Val) );
-    break;
-  }
-
-  case Type::TypeTyID:
-    PARSE_ERROR("Type constants shouldn't live in constant table!");
-    break;
-
-  case Type::ArrayTyID: {
-    const ArrayType *AT = cast<ArrayType>(Ty);
-    unsigned NumElements = AT->getNumElements();
-    std::vector<unsigned> Elements;
-    Elements.reserve(NumElements);
-    while (NumElements--)     // Read all of the elements of the constant.
-      Elements.push_back(read_vbr_uint());
-
-    handler->handleConstantArray( AT, Elements );
-    break;
-  }
-
-  case Type::StructTyID: {
-    const StructType *ST = cast<StructType>(Ty);
-    std::vector<unsigned> Elements;
-    Elements.reserve(ST->getNumElements());
-    for (unsigned i = 0; i != ST->getNumElements(); ++i)
-      Elements.push_back(read_vbr_uint());
-    handler->handleConstantStruct( ST, Elements );
-    break;
-  }    
-
-  case Type::PointerTyID: {  // ConstantPointerRef value...
-    const PointerType *PT = cast<PointerType>(Ty);
-    unsigned Slot = read_vbr_uint();
-    handler->handleConstantPointer( PT, Slot );
-    break;
-  }
-
-  default:
-    PARSE_ERROR("Don't know how to deserialize constant value of type '"+
-                      Ty->getDescription());
-  }
-}
-
-void AbstractBytecodeParser::ParseGlobalTypes() {
-  ParseConstantPool(ModuleTypes);
-}
-
-void AbstractBytecodeParser::ParseStringConstants(unsigned NumEntries ){
-  for (; NumEntries; --NumEntries) {
-    unsigned Typ = read_vbr_uint();
-    const Type *Ty = getType(Typ);
-    if (!isa<ArrayType>(Ty))
-      throw std::string("String constant data invalid!");
-    
-    const ArrayType *ATy = cast<ArrayType>(Ty);
-    if (ATy->getElementType() != Type::SByteTy &&
-        ATy->getElementType() != Type::UByteTy)
-      throw std::string("String constant data invalid!");
-    
-    // Read character data.  The type tells us how long the string is.
-    char Data[ATy->getNumElements()];
-    read_data(Data, Data+ATy->getNumElements());
-
-    std::vector<Constant*> Elements(ATy->getNumElements());
-    if (ATy->getElementType() == Type::SByteTy)
-      for (unsigned i = 0, e = ATy->getNumElements(); i != e; ++i)
-        Elements[i] = ConstantSInt::get(Type::SByteTy, (signed char)Data[i]);
-    else
-      for (unsigned i = 0, e = ATy->getNumElements(); i != e; ++i)
-        Elements[i] = ConstantUInt::get(Type::UByteTy, (unsigned char)Data[i]);
-
-    // Create the constant, inserting it as needed.
-    ConstantArray *C = cast<ConstantArray>( ConstantArray::get(ATy, Elements) );
-    handler->handleConstantString( C );
-  }
-}
-
-
-void AbstractBytecodeParser::ParseConstantPool( TypeListTy &TypeTab) {
-  while ( moreInBlock() ) {
-    unsigned NumEntries = read_vbr_uint();
-    unsigned Typ = read_vbr_uint();
-    if (Typ == Type::TypeTyID) {
-      ParseTypeConstants(TypeTab, NumEntries);
-    } else if (Typ == Type::VoidTyID) {
-      ParseStringConstants(NumEntries);
-    } else {
-      BCR_TRACE(3, "Type: '" << *getType(Typ) << "'  NumEntries: "
-                << NumEntries << "\n");
-
-      for (unsigned i = 0; i < NumEntries; ++i) {
-        ParseConstantValue(Typ);
-      }
-    }
-  }
-  
-  checkPastBlockEnd("Constant Pool");
-}
-
-void AbstractBytecodeParser::ParseModuleGlobalInfo() {
-
-  handler->handleModuleGlobalsBegin();
-
-  // Read global variables...
-  unsigned VarType = read_vbr_uint();
-  while (VarType != Type::VoidTyID) { // List is terminated by Void
-    // VarType Fields: bit0 = isConstant, bit1 = hasInitializer, bit2,3,4 =
-    // Linkage, bit4+ = slot#
-    unsigned SlotNo = VarType >> 5;
-    unsigned LinkageID = (VarType >> 2) & 7;
-    bool isConstant = VarType & 1;
-    bool hasInitializer = VarType & 2;
-    GlobalValue::LinkageTypes Linkage;
-
-    switch (LinkageID) {
-    case 0: Linkage = GlobalValue::ExternalLinkage;  break;
-    case 1: Linkage = GlobalValue::WeakLinkage;      break;
-    case 2: Linkage = GlobalValue::AppendingLinkage; break;
-    case 3: Linkage = GlobalValue::InternalLinkage;  break;
-    case 4: Linkage = GlobalValue::LinkOnceLinkage;  break;
-    default: 
-      PARSE_ERROR("Unknown linkage type: " << LinkageID);
-      Linkage = GlobalValue::InternalLinkage;
-      break;
-    }
-
-    const Type *Ty = getType(SlotNo);
-    if ( !Ty ) {
-      PARSE_ERROR("Global has no type! SlotNo=" << SlotNo);
-    }
-
-    if ( !isa<PointerType>(Ty)) {
-      PARSE_ERROR("Global not a pointer type! Ty= " << Ty->getDescription());
-    }
-
-    const Type *ElTy = cast<PointerType>(Ty)->getElementType();
-
-    // Create the global variable...
-    if (hasInitializer) {
-      unsigned initSlot = read_vbr_uint();
-      handler->handleInitializedGV( ElTy, isConstant, Linkage, initSlot );
-    } else 
-      handler->handleGlobalVariable( ElTy, isConstant, Linkage );
-
-    // Get next item
-    VarType = read_vbr_uint();
-  }
-
-  // Read the function objects for all of the functions that are coming
-  unsigned FnSignature = read_vbr_uint();
-  while (FnSignature != Type::VoidTyID) { // List is terminated by Void
-    const Type *Ty = getType(FnSignature);
-    if (!isa<PointerType>(Ty) ||
-        !isa<FunctionType>(cast<PointerType>(Ty)->getElementType())) {
-      PARSE_ERROR( "Function not a pointer to function type! Ty = " +
-                        Ty->getDescription());
-      // FIXME: what should Ty be if handler continues?
-    }
-
-    // We create functions by passing the underlying FunctionType to create...
-    const FunctionType* FTy = 
-      cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
-    Function* Func = new Function(FTy, GlobalValue::ExternalLinkage);
-
-    // Save this for later so we know type of lazily instantiated functions
-    FunctionSignatureList.push_back(Func);
-
-    handler->handleFunctionDeclaration(Func, FTy);
-
-    // Get Next function signature
-    FnSignature = read_vbr_uint();
-  }
-
-  if (hasInconsistentModuleGlobalInfo)
-    align32();
-
-  // Now that the function signature list is set up, reverse it so that we can 
-  // remove elements efficiently from the back of the vector.
-  std::reverse(FunctionSignatureList.begin(), FunctionSignatureList.end());
-
-  // This is for future proofing... in the future extra fields may be added that
-  // we don't understand, so we transparently ignore them.
-  //
-  At = BlockEnd;
-
-  handler->handleModuleGlobalsEnd();
-}
-
-void AbstractBytecodeParser::ParseVersionInfo() {
-  unsigned Version = read_vbr_uint();
-
-  // Unpack version number: low four bits are for flags, top bits = version
-  Module::Endianness  Endianness;
-  Module::PointerSize PointerSize;
-  Endianness  = (Version & 1) ? Module::BigEndian : Module::LittleEndian;
-  PointerSize = (Version & 2) ? Module::Pointer64 : Module::Pointer32;
-
-  bool hasNoEndianness = Version & 4;
-  bool hasNoPointerSize = Version & 8;
-  
-  RevisionNum = Version >> 4;
-
-  // Default values for the current bytecode version
-  hasInconsistentModuleGlobalInfo = false;
-  hasExplicitPrimitiveZeros = false;
-  hasRestrictedGEPTypes = false;
-
-  switch (RevisionNum) {
-  case 0:               //  LLVM 1.0, 1.1 release version
-    // Base LLVM 1.0 bytecode format.
-    hasInconsistentModuleGlobalInfo = true;
-    hasExplicitPrimitiveZeros = true;
-    // FALL THROUGH
-  case 1:               // LLVM 1.2 release version
-    // LLVM 1.2 added explicit support for emitting strings efficiently.
-
-    // Also, it fixed the problem where the size of the ModuleGlobalInfo block
-    // included the size for the alignment at the end, where the rest of the
-    // blocks did not.
-
-    // LLVM 1.2 and before required that GEP indices be ubyte constants for
-    // structures and longs for sequential types.
-    hasRestrictedGEPTypes = true;
-
-    // FALL THROUGH
-  case 2:               // LLVM 1.3 release version
-    break;
-
-  default:
-    PARSE_ERROR("Unknown bytecode version number: " << RevisionNum);
-  }
-
-  if (hasNoEndianness) Endianness  = Module::AnyEndianness;
-  if (hasNoPointerSize) PointerSize = Module::AnyPointerSize;
-
-  handler->handleVersionInfo(RevisionNum, Endianness, PointerSize );
-}
-
-void AbstractBytecodeParser::ParseModule() {
-  unsigned Type, Size;
-
-  FunctionSignatureList.clear(); // Just in case...
-
-  // Read into instance variables...
-  ParseVersionInfo();
-  align32(); /// FIXME: Is this redundant? VI is first and 4 bytes!
-
-  bool SeenModuleGlobalInfo = false;
-  bool SeenGlobalTypePlane = false;
-  BufPtr MyEnd = BlockEnd;
-  while (At < MyEnd) {
-    BufPtr OldAt = At;
-    readBlock(Type, Size);
-
-    switch (Type) {
-
-    case BytecodeFormat::GlobalTypePlane:
-      if ( SeenGlobalTypePlane )
-        PARSE_ERROR("Two GlobalTypePlane Blocks Encountered!");
-
-      ParseGlobalTypes();
-      SeenGlobalTypePlane = true;
-      break;
-
-    case BytecodeFormat::ModuleGlobalInfo: 
-      if ( SeenModuleGlobalInfo )
-        PARSE_ERROR("Two ModuleGlobalInfo Blocks Encountered!");
-      ParseModuleGlobalInfo();
-      SeenModuleGlobalInfo = true;
-      break;
-
-    case BytecodeFormat::ConstantPool:
-      ParseConstantPool(ModuleTypes);
-      break;
-
-    case BytecodeFormat::Function:
-      ParseFunctionLazily();
-      break;
-
-    case BytecodeFormat::SymbolTable:
-      ParseSymbolTable();
-      break;
-
-    default:
-      At += Size;
-      if (OldAt > At) {
-        PARSE_ERROR("Unexpected Block of Type" << Type << "encountered!" );
-      }
-      break;
-    }
-    BlockEnd = MyEnd;
-    align32();
-  }
-
-  /// Make sure we pulled them all out. If we didn't then there's a declaration
-  /// but a missing body. That's not allowed.
-  if (!FunctionSignatureList.empty())
-    throw std::string(
-      "Function declared, but bytecode stream ended before definition");
-}
-
-void AbstractBytecodeParser::ParseBytecode(
-       BufPtr b, unsigned Length,
-       const std::string &ModuleID) {
-
-  At = MemStart = BlockStart = b;
-  MemEnd = BlockEnd = b + Length;
-  handler->handleStart();
-
-  // Read and check signature...
-  unsigned Sig = read_uint();
-  if (Sig != ('l' | ('l' << 8) | ('v' << 16) | ('m' << 24))) {
-    PARSE_ERROR("Invalid bytecode signature: " << Sig);
-  }
-
-  handler->handleModuleBegin(ModuleID);
-
-  unsigned Type, Size;
-  readBlock(Type, Size);
-  if ( Type != BytecodeFormat::Module ) {
-    PARSE_ERROR("Expected Module Block! At: " << unsigned(intptr_t(At))
-      << ", Type:" << Type << ", Size:" << Size);
-  }
-  if ( At + Size != MemEnd ) {
-    PARSE_ERROR("Invalid Top Level Block Length! At: " 
-      << unsigned(intptr_t(At)) << ", Type:" << Type << ", Size:" << Size);
-  }
-  this->ParseModule();
-
-  handler->handleModuleEnd(ModuleID);
-
-  handler->handleFinish();
-}
-
-//===----------------------------------------------------------------------===//
-//=== Default Implementations of Handler Methods
-//===----------------------------------------------------------------------===//
-
-bool BytecodeHandler::handleError(const std::string& str ) { return false; }
-void BytecodeHandler::handleStart() { }
-void BytecodeHandler::handleFinish() { }
-void BytecodeHandler::handleModuleBegin(const std::string& id) { }
-void BytecodeHandler::handleModuleEnd(const std::string& id) { }
-void BytecodeHandler::handleVersionInfo( unsigned char RevisionNum,
-  Module::Endianness Endianness, Module::PointerSize PointerSize) { }
-void BytecodeHandler::handleModuleGlobalsBegin() { }
-void BytecodeHandler::handleGlobalVariable( 
-  const Type* ElemType, bool isConstant, GlobalValue::LinkageTypes ) { }
-void BytecodeHandler::handleInitializedGV( 
-  const Type* ElemType, bool isConstant, GlobalValue::LinkageTypes,
-  unsigned initSlot) {}
-void BytecodeHandler::handleType( const Type* Ty ) {}
-void BytecodeHandler::handleFunctionDeclaration( 
-  Function* Func, const FunctionType* FuncType) {}
-void BytecodeHandler::handleModuleGlobalsEnd() { } 
-void BytecodeHandler::handleCompactionTableBegin() { } 
-void BytecodeHandler::handleCompactionTablePlane( unsigned Ty, 
-  unsigned NumEntries) {}
-void BytecodeHandler::handleCompactionTableType( unsigned i, unsigned TypSlot, 
-  const Type* ) {}
-void BytecodeHandler::handleCompactionTableValue( unsigned i, unsigned ValSlot,
-  const Type* ) {}