remove the old bc writer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36881 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 1266 deletions

diff --git a/lib/Bytecode/Writer/Writer.cpp b/lib/Bytecode/Writer/Writer.cpp
deleted file mode 100644
index ea5159b28f..0000000000
--- a/lib/Bytecode/Writer/Writer.cpp
+++ /dev/null
@@ -1,1266 +0,0 @@
-//===-- Writer.cpp - Library for writing LLVM 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/Writer.h
-//
-// Note that this file uses an unusual technique of outputting all the bytecode
-// to a vector of unsigned char, then copies the vector to an ostream.  The
-// reason for this is that we must do "seeking" in the stream to do back-
-// patching, and some very important ostreams that we want to support (like
-// pipes) do not support seeking.  :( :( :(
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "bcwriter"
-#include "WriterInternals.h"
-#include "llvm/Bytecode/WriteBytecodePass.h"
-#include "llvm/CallingConv.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/ParameterAttributes.h"
-#include "llvm/InlineAsm.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/TypeSymbolTable.h"
-#include "llvm/ValueSymbolTable.h"
-#include "llvm/Support/GetElementPtrTypeIterator.h"
-#include "llvm/Support/Compressor.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/Streams.h"
-#include "llvm/System/Program.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/Statistic.h"
-#include <cstring>
-#include <algorithm>
-using namespace llvm;
-
-/// This value needs to be incremented every time the bytecode format changes
-/// so that the reader can distinguish which format of the bytecode file has
-/// been written.
-/// @brief The bytecode version number
-const unsigned BCVersionNum = 7;
-
-char WriteBytecodePass::ID = 0;
-static RegisterPass<WriteBytecodePass> X("emitbytecode", "Bytecode Writer");
-
-STATISTIC(BytesWritten, "Number of bytecode bytes written");
-
-//===----------------------------------------------------------------------===//
-//===                           Output Primitives                          ===//
-//===----------------------------------------------------------------------===//
-
-// output - If a position is specified, it must be in the valid portion of the
-// string... note that this should be inlined always so only the relevant IF
-// body should be included.
-inline void BytecodeWriter::output(unsigned i, int pos) {
-  if (pos == -1) { // Be endian clean, little endian is our friend
-    Out.push_back((unsigned char)i);
-    Out.push_back((unsigned char)(i >> 8));
-    Out.push_back((unsigned char)(i >> 16));
-    Out.push_back((unsigned char)(i >> 24));
-  } else {
-    Out[pos  ] = (unsigned char)i;
-    Out[pos+1] = (unsigned char)(i >> 8);
-    Out[pos+2] = (unsigned char)(i >> 16);
-    Out[pos+3] = (unsigned char)(i >> 24);
-  }
-}
-
-inline void BytecodeWriter::output(int32_t i) {
-  output((uint32_t)i);
-}
-
-/// output_vbr - Output an unsigned value, by using the least number of bytes
-/// possible.  This is useful because many of our "infinite" values are really
-/// very small most of the time; but can be large a few times.
-/// Data format used:  If you read a byte with the high bit set, use the low
-/// seven bits as data and then read another byte.
-inline void BytecodeWriter::output_vbr(uint64_t i) {
-  while (1) {
-    if (i < 0x80) { // done?
-      Out.push_back((unsigned char)i);   // We know the high bit is clear...
-      return;
-    }
-
-    // Nope, we are bigger than a character, output the next 7 bits and set the
-    // high bit to say that there is more coming...
-    Out.push_back(0x80 | ((unsigned char)i & 0x7F));
-    i >>= 7;  // Shift out 7 bits now...
-  }
-}
-
-inline void BytecodeWriter::output_vbr(uint32_t i) {
-  while (1) {
-    if (i < 0x80) { // done?
-      Out.push_back((unsigned char)i);   // We know the high bit is clear...
-      return;
-    }
-
-    // Nope, we are bigger than a character, output the next 7 bits and set the
-    // high bit to say that there is more coming...
-    Out.push_back(0x80 | ((unsigned char)i & 0x7F));
-    i >>= 7;  // Shift out 7 bits now...
-  }
-}
-
-inline void BytecodeWriter::output_typeid(unsigned i) {
-  if (i <= 0x00FFFFFF)
-    this->output_vbr(i);
-  else {
-    this->output_vbr(0x00FFFFFF);
-    this->output_vbr(i);
-  }
-}
-
-inline void BytecodeWriter::output_vbr(int64_t i) {
-  if (i < 0)
-    output_vbr(((uint64_t)(-i) << 1) | 1); // Set low order sign bit...
-  else
-    output_vbr((uint64_t)i << 1);          // Low order bit is clear.
-}
-
-
-inline void BytecodeWriter::output_vbr(int i) {
-  if (i < 0)
-    output_vbr(((unsigned)(-i) << 1) | 1); // Set low order sign bit...
-  else
-    output_vbr((unsigned)i << 1);          // Low order bit is clear.
-}
-
-inline void BytecodeWriter::output_str(const char *Str, unsigned Len) {
-  output_vbr(Len);             // Strings may have an arbitrary length.
-  Out.insert(Out.end(), Str, Str+Len);
-}
-
-inline void BytecodeWriter::output_data(const void *Ptr, const void *End) {
-  Out.insert(Out.end(), (const unsigned char*)Ptr, (const unsigned char*)End);
-}
-
-inline void BytecodeWriter::output_float(float& FloatVal) {
-  /// FIXME: This isn't optimal, it has size problems on some platforms
-  /// where FP is not IEEE.
-  uint32_t i = FloatToBits(FloatVal);
-  Out.push_back( static_cast<unsigned char>( (i      ) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 8 ) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 16) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 24) & 0xFF));
-}
-
-inline void BytecodeWriter::output_double(double& DoubleVal) {
-  /// FIXME: This isn't optimal, it has size problems on some platforms
-  /// where FP is not IEEE.
-  uint64_t i = DoubleToBits(DoubleVal);
-  Out.push_back( static_cast<unsigned char>( (i      ) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 8 ) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 16) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 24) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 32) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 40) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 48) & 0xFF));
-  Out.push_back( static_cast<unsigned char>( (i >> 56) & 0xFF));
-}
-
-inline BytecodeBlock::BytecodeBlock(unsigned ID, BytecodeWriter &w,
-                                    bool elideIfEmpty, bool hasLongFormat)
-  : Id(ID), Writer(w), ElideIfEmpty(elideIfEmpty), HasLongFormat(hasLongFormat){
-
-  if (HasLongFormat) {
-    w.output(ID);
-    w.output(0U); // For length in long format
-  } else {
-    w.output(0U); /// Place holder for ID and length for this block
-  }
-  Loc = w.size();
-}
-
-inline BytecodeBlock::~BytecodeBlock() { // Do backpatch when block goes out
-                                         // of scope...
-  if (Loc == Writer.size() && ElideIfEmpty) {
-    // If the block is empty, and we are allowed to, do not emit the block at
-    // all!
-    Writer.resize(Writer.size()-(HasLongFormat?8:4));
-    return;
-  }
-
-  if (HasLongFormat)
-    Writer.output(unsigned(Writer.size()-Loc), int(Loc-4));
-  else
-    Writer.output(unsigned(Writer.size()-Loc) << 5 | (Id & 0x1F), int(Loc-4));
-}
-
-//===----------------------------------------------------------------------===//
-//===                           Constant Output                            ===//
-//===----------------------------------------------------------------------===//
-
-void BytecodeWriter::outputParamAttrsList(const ParamAttrsList *Attrs) {
-  if (!Attrs) {
-    output_vbr(unsigned(0));
-    return;
-  }
-  unsigned numAttrs = Attrs->size();
-  output_vbr(numAttrs);
-  for (unsigned i = 0; i < numAttrs; ++i) {
-    uint16_t index = Attrs->getParamIndex(i);
-    uint16_t attrs = Attrs->getParamAttrs(index);
-    output_vbr(uint32_t(index));
-    output_vbr(uint32_t(attrs));
-  }
-}
-
-void BytecodeWriter::outputType(const Type *T) {
-  const StructType* STy = dyn_cast<StructType>(T);
-  if(STy && STy->isPacked())
-    output_vbr((unsigned)Type::PackedStructTyID);
-  else
-    output_vbr((unsigned)T->getTypeID());
-
-  // That's all there is to handling primitive types...
-  if (T->isPrimitiveType())
-    return;     // We might do this if we alias a prim type: %x = type int
-
-  switch (T->getTypeID()) {   // Handle derived types now.
-  case Type::IntegerTyID:
-    output_vbr(cast<IntegerType>(T)->getBitWidth());
-    break;
-  case Type::FunctionTyID: {
-    const FunctionType *FT = cast<FunctionType>(T);
-    output_typeid(Table.getTypeSlot(FT->getReturnType()));
-
-    // Output the number of arguments to function (+1 if varargs):
-    output_vbr((unsigned)FT->getNumParams()+FT->isVarArg());
-
-    // Output all of the arguments...
-    FunctionType::param_iterator I = FT->param_begin();
-    for (; I != FT->param_end(); ++I)
-      output_typeid(Table.getTypeSlot(*I));
-
-    // Terminate list with VoidTy if we are a varargs function...
-    if (FT->isVarArg())
-      output_typeid((unsigned)Type::VoidTyID);
-
-    // Put out all the parameter attributes
-    outputParamAttrsList(FT->getParamAttrs());
-    break;
-  }
-
-  case Type::ArrayTyID: {
-    const ArrayType *AT = cast<ArrayType>(T);
-    output_typeid(Table.getTypeSlot(AT->getElementType()));
-    output_vbr(AT->getNumElements());
-    break;
-  }
-
- case Type::VectorTyID: {
-    const VectorType *PT = cast<VectorType>(T);
-    output_typeid(Table.getTypeSlot(PT->getElementType()));
-    output_vbr(PT->getNumElements());
-    break;
-  }
-
-  case Type::StructTyID: {
-    const StructType *ST = cast<StructType>(T);
-    // Output all of the element types...
-    for (StructType::element_iterator I = ST->element_begin(),
-           E = ST->element_end(); I != E; ++I) {
-      output_typeid(Table.getTypeSlot(*I));
-    }
-
-    // Terminate list with VoidTy
-    output_typeid((unsigned)Type::VoidTyID);
-    break;
-  }
-
-  case Type::PointerTyID:
-    output_typeid(Table.getTypeSlot(cast<PointerType>(T)->getElementType()));
-    break;
-
-  case Type::OpaqueTyID:
-    // No need to emit anything, just the count of opaque types is enough.
-    break;
-
-  default:
-    cerr << __FILE__ << ":" << __LINE__ << ": Don't know how to serialize"
-         << " Type '" << T->getDescription() << "'\n";
-    break;
-  }
-}
-
-void BytecodeWriter::outputConstant(const Constant *CPV) {
-  assert(((CPV->getType()->isPrimitiveType() || CPV->getType()->isInteger()) ||
-          !CPV->isNullValue()) && "Shouldn't output null constants!");
-
-  // We must check for a ConstantExpr before switching by type because
-  // a ConstantExpr can be of any type, and has no explicit value.
-  //
-  if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
-    // FIXME: Encoding of constant exprs could be much more compact!
-    assert(CE->getNumOperands() > 0 && "ConstantExpr with 0 operands");
-    assert(CE->getNumOperands() != 1 || CE->isCast());
-    output_vbr(1+CE->getNumOperands());   // flags as an expr
-    output_vbr(CE->getOpcode());          // Put out the CE op code
-
-    for (User::const_op_iterator OI = CE->op_begin(); OI != CE->op_end(); ++OI){
-      output_vbr(Table.getSlot(*OI));
-      output_typeid(Table.getTypeSlot((*OI)->getType()));
-    }
-    if (CE->isCompare())
-      output_vbr((unsigned)CE->getPredicate());
-    return;
-  } else if (isa<UndefValue>(CPV)) {
-    output_vbr(1U);       // 1 -> UndefValue constant.
-    return;
-  } else {
-    output_vbr(0U);       // flag as not a ConstantExpr (i.e. 0 operands)
-  }
-
-  switch (CPV->getType()->getTypeID()) {
-  case Type::IntegerTyID: { // Integer types...
-    const ConstantInt *CI = cast<ConstantInt>(CPV);
-    unsigned NumBits = cast<IntegerType>(CPV->getType())->getBitWidth();
-    if (NumBits <= 32)
-      output_vbr(uint32_t(CI->getZExtValue()));
-    else if (NumBits <= 64)
-      output_vbr(uint64_t(CI->getZExtValue()));
-    else {
-      // We have an arbitrary precision integer value to write whose 
-      // bit width is > 64. However, in canonical unsigned integer 
-      // format it is likely that the high bits are going to be zero.
-      // So, we only write the number of active words. 
-      uint32_t activeWords = CI->getValue().getActiveWords();
-      const uint64_t *rawData = CI->getValue().getRawData();
-      output_vbr(activeWords);
-      for (uint32_t i = 0; i < activeWords; ++i)
-        output_vbr(rawData[i]);
-    }
-    break;
-  }
-
-  case Type::ArrayTyID: {
-    const ConstantArray *CPA = cast<ConstantArray>(CPV);
-    assert(!CPA->isString() && "Constant strings should be handled specially!");
-
-    for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
-      output_vbr(Table.getSlot(CPA->getOperand(i)));
-    break;
-  }
-
-  case Type::VectorTyID: {
-    const ConstantVector *CP = cast<ConstantVector>(CPV);
-    for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
-      output_vbr(Table.getSlot(CP->getOperand(i)));
-    break;
-  }
-
-  case Type::StructTyID: {
-    const ConstantStruct *CPS = cast<ConstantStruct>(CPV);
-
-    for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
-      output_vbr(Table.getSlot(CPS->getOperand(i)));
-    break;
-  }
-
-  case Type::PointerTyID:
-    assert(0 && "No non-null, non-constant-expr constants allowed!");
-    abort();
-
-  case Type::FloatTyID: {   // Floating point types...
-    float Tmp = (float)cast<ConstantFP>(CPV)->getValue();
-    output_float(Tmp);
-    break;
-  }
-  case Type::DoubleTyID: {
-    double Tmp = cast<ConstantFP>(CPV)->getValue();
-    output_double(Tmp);
-    break;
-  }
-
-  case Type::VoidTyID:
-  case Type::LabelTyID:
-  default:
-    cerr << __FILE__ << ":" << __LINE__ << ": Don't know how to serialize"
-         << " type '" << *CPV->getType() << "'\n";
-    break;
-  }
-  return;
-}
-
-/// outputInlineAsm - InlineAsm's get emitted to the constant pool, so they can
-/// be shared by multiple uses.
-void BytecodeWriter::outputInlineAsm(const InlineAsm *IA) {
-  // Output a marker, so we know when we have one one parsing the constant pool.
-  // Note that this encoding is 5 bytes: not very efficient for a marker.  Since
-  // unique inline asms are rare, this should hardly matter.
-  output_vbr(~0U);
-  
-  output(IA->getAsmString());
-  output(IA->getConstraintString());
-  output_vbr(unsigned(IA->hasSideEffects()));
-}
-
-void BytecodeWriter::outputConstantStrings() {
-  SlotCalculator::string_iterator I = Table.string_begin();
-  SlotCalculator::string_iterator E = Table.string_end();
-  if (I == E) return;  // No strings to emit
-
-  // If we have != 0 strings to emit, output them now.  Strings are emitted into
-  // the 'void' type plane.
-  output_vbr(unsigned(E-I));
-  output_typeid(Type::VoidTyID);
-
-  // Emit all of the strings.
-  for (I = Table.string_begin(); I != E; ++I) {
-    const ConstantArray *Str = *I;
-    output_typeid(Table.getTypeSlot(Str->getType()));
-
-    // Now that we emitted the type (which indicates the size of the string),
-    // emit all of the characters.
-    std::string Val = Str->getAsString();
-    output_data(Val.c_str(), Val.c_str()+Val.size());
-  }
-}
-
-//===----------------------------------------------------------------------===//
-//===                           Instruction Output                         ===//
-//===----------------------------------------------------------------------===//
-
-// outputInstructionFormat0 - Output those weird instructions that have a large
-// number of operands or have large operands themselves.
-//
-// Format: [opcode] [type] [numargs] [arg0] [arg1] ... [arg<numargs-1>]
-//
-void BytecodeWriter::outputInstructionFormat0(const Instruction *I,
-                                              unsigned Opcode,
-                                              const SlotCalculator &Table,
-                                              unsigned Type) {
-  // Opcode must have top two bits clear...
-  output_vbr(Opcode << 2);                  // Instruction Opcode ID
-  output_typeid(Type);                      // Result type
-
-  unsigned NumArgs = I->getNumOperands();
-  bool HasExtraArg = false;
-  if (isa<CastInst>(I)  || isa<InvokeInst>(I) || 
-      isa<CmpInst>(I) || isa<VAArgInst>(I) || Opcode == 58 || 
-      Opcode == 62 || Opcode == 63)
-    HasExtraArg = true;
-  if (const AllocationInst *AI = dyn_cast<AllocationInst>(I))
-    HasExtraArg = AI->getAlignment() != 0;
-  
-  output_vbr(NumArgs + HasExtraArg);
-
-  if (!isa<GetElementPtrInst>(&I)) {
-    for (unsigned i = 0; i < NumArgs; ++i)
-      output_vbr(Table.getSlot(I->getOperand(i)));
-
-    if (isa<CastInst>(I) || isa<VAArgInst>(I)) {
-      output_typeid(Table.getTypeSlot(I->getType()));
-    } else if (isa<CmpInst>(I)) {
-      output_vbr(unsigned(cast<CmpInst>(I)->getPredicate()));
-    } else if (isa<InvokeInst>(I)) {  
-      output_vbr(cast<InvokeInst>(I)->getCallingConv());
-    } else if (Opcode == 58) {  // Call escape sequence
-      output_vbr((cast<CallInst>(I)->getCallingConv() << 1) |
-                 unsigned(cast<CallInst>(I)->isTailCall()));
-    } else if (const AllocationInst *AI = dyn_cast<AllocationInst>(I)) {
-      if (AI->getAlignment())
-        output_vbr((unsigned)Log2_32(AI->getAlignment())+1);
-    } else if (Opcode == 62) { // Attributed load
-      output_vbr((unsigned)(((Log2_32(cast<LoadInst>(I)->getAlignment())+1)<<1)
-                            + (cast<LoadInst>(I)->isVolatile() ? 1 : 0)));
-    } else if (Opcode == 63) { // Attributed store
-      output_vbr((unsigned)(((Log2_32(cast<StoreInst>(I)->getAlignment())+1)<<1)
-                            + (cast<StoreInst>(I)->isVolatile() ? 1 : 0)));
-    }
-  } else {
-    output_vbr(Table.getSlot(I->getOperand(0)));
-
-    // We need to encode the type of sequential type indices into their slot #
-    unsigned Idx = 1;
-    for (gep_type_iterator TI = gep_type_begin(I), E = gep_type_end(I);
-         Idx != NumArgs; ++TI, ++Idx) {
-      unsigned Slot = Table.getSlot(I->getOperand(Idx));
-
-      if (isa<SequentialType>(*TI)) {
-        // These should be either 32-bits or 64-bits, however, with bit
-        // accurate types we just distinguish between less than or equal to
-        // 32-bits or greater than 32-bits.
-        unsigned BitWidth = 
-          cast<IntegerType>(I->getOperand(Idx)->getType())->getBitWidth();
-        assert(BitWidth == 32 || BitWidth == 64 && 
-               "Invalid bitwidth for GEP index");
-        unsigned IdxId = BitWidth == 32 ? 0 : 1;
-        Slot = (Slot << 1) | IdxId;
-      }
-      output_vbr(Slot);
-    }
-  }
-}
-
-
-// outputInstrVarArgsCall - Output the absurdly annoying varargs function calls.
-// This are more annoying than most because the signature of the call does not
-// tell us anything about the types of the arguments in the varargs portion.
-// Because of this, we encode (as type 0) all of the argument types explicitly
-// before the argument value.  This really sucks, but you shouldn't be using
-// varargs functions in your code! *death to printf*!
-//
-// Format: [opcode] [type] [numargs] [arg0] [arg1] ... [arg<numargs-1>]
-//
-void BytecodeWriter::outputInstrVarArgsCall(const Instruction *I,
-                                            unsigned Opcode,
-                                            const SlotCalculator &Table,
-                                            unsigned Type) {
-  assert(isa<CallInst>(I) || isa<InvokeInst>(I));
-  // Opcode must have top two bits clear...
-  output_vbr(Opcode << 2);                  // Instruction Opcode ID
-  output_typeid(Type);                      // Result type (varargs type)
-
-  const PointerType *PTy = cast<PointerType>(I->getOperand(0)->getType());
-  const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
-  unsigned NumParams = FTy->getNumParams();
-
-  unsigned NumFixedOperands;
-  if (isa<CallInst>(I)) {
-    // Output an operand for the callee and each fixed argument, then two for
-    // each variable argument.
-    NumFixedOperands = 1+NumParams;
-  } else {
-    assert(isa<InvokeInst>(I) && "Not call or invoke??");
-    // Output an operand for the callee and destinations, then two for each
-    // variable argument.
-    NumFixedOperands = 3+NumParams;
-  }
-  output_vbr(2 * I->getNumOperands()-NumFixedOperands + 
-      unsigned(Opcode == 58 || isa<InvokeInst>(I)));
-
-  // The type for the function has already been emitted in the type field of the
-  // instruction.  Just emit the slot # now.
-  for (unsigned i = 0; i != NumFixedOperands; ++i)
-    output_vbr(Table.getSlot(I->getOperand(i)));
-
-  for (unsigned i = NumFixedOperands, e = I->getNumOperands(); i != e; ++i) {
-    // Output Arg Type ID
-    output_typeid(Table.getTypeSlot(I->getOperand(i)->getType()));
-
-    // Output arg ID itself
-    output_vbr(Table.getSlot(I->getOperand(i)));
-  }
-  
-  if (isa<InvokeInst>(I)) {
-    // Emit the tail call/calling conv for invoke instructions
-    output_vbr(cast<InvokeInst>(I)->getCallingConv());
-  } else if (Opcode == 58) {
-    const CallInst *CI = cast<CallInst>(I);
-    output_vbr((CI->getCallingConv() << 1) | unsigned(CI->isTailCall()));
-  }
-}
-
-
-// outputInstructionFormat1 - Output one operand instructions, knowing that no
-// operand index is >= 2^12.
-//
-inline void BytecodeWriter::outputInstructionFormat1(const Instruction *I,
-                                                     unsigned Opcode,
-                                                     unsigned *Slots,
-                                                     unsigned Type) {
-  // bits   Instruction format:
-  // --------------------------
-  // 01-00: Opcode type, fixed to 1.
-  // 07-02: Opcode
-  // 19-08: Resulting type plane
-  // 31-20: Operand #1 (if set to (2^12-1), then zero operands)
-  //
-  output(1 | (Opcode << 2) | (Type << 8) | (Slots[0] << 20));
-}
-
-
-// outputInstructionFormat2 - Output two operand instructions, knowing that no
-// operand index is >= 2^8.
-//
-inline void BytecodeWriter::outputInstructionFormat2(const Instruction *I,
-                                                     unsigned Opcode,
-                                                     unsigned *Slots,
-                                                     unsigned Type) {
-  // bits   Instruction format:
-  // --------------------------
-  // 01-00: Opcode type, fixed to 2.
-  // 07-02: Opcode
-  // 15-08: Resulting type plane
-  // 23-16: Operand #1
-  // 31-24: Operand #2
-  //
-  output(2 | (Opcode << 2) | (Type << 8) | (Slots[0] << 16) | (Slots[1] << 24));
-}
-
-
-// outputInstructionFormat3 - Output three operand instructions, knowing that no
-// operand index is >= 2^6.
-//
-inline void BytecodeWriter::outputInstructionFormat3(const Instruction *I,
-                                                     unsigned Opcode,
-                                                     unsigned *Slots,
-                                                     unsigned Type) {
-  // bits   Instruction format:
-  // --------------------------
-  // 01-00: Opcode type, fixed to 3.
-  // 07-02: Opcode
-  // 13-08: Resulting type plane
-  // 19-14: Operand #1
-  // 25-20: Operand #2
-  // 31-26: Operand #3
-  //
-  output(3 | (Opcode << 2) | (Type << 8) |
-          (Slots[0] << 14) | (Slots[1] << 20) | (Slots[2] << 26));
-}
-
-void BytecodeWriter::outputInstruction(const Instruction &I) {
-  assert(I.getOpcode() < 57 && "Opcode too big???");
-  unsigned Opcode = I.getOpcode();
-  unsigned NumOperands = I.getNumOperands();
-
-  // Encode 'tail call' as 61
-  // 63.
-  if (const CallInst *CI = dyn_cast<CallInst>(&I)) {
-    if (CI->getCallingConv() == CallingConv::C) {
-      if (CI->isTailCall())
-        Opcode = 61;   // CCC + Tail Call
-      else
-        ;     // Opcode = Instruction::Call
-    } else if (CI->getCallingConv() == CallingConv::Fast) {
-      if (CI->isTailCall())
-        Opcode = 59;    // FastCC + TailCall
-      else
-        Opcode = 60;    // FastCC + Not Tail Call
-    } else {
-      Opcode = 58;      // Call escape sequence.
-    }
-  }
-
-  // Figure out which type to encode with the instruction.  Typically we want
-  // the type of the first parameter, as opposed to the type of the instruction
-  // (for example, with setcc, we always know it returns bool, but the type of
-  // the first param is actually interesting).  But if we have no arguments
-  // we take the type of the instruction itself.
-  //
-  const Type *Ty;
-  switch (I.getOpcode()) {
-  case Instruction::Select:
-  case Instruction::Malloc:
-  case Instruction::Alloca:
-    Ty = I.getType();  // These ALWAYS want to encode the return type
-    break;
-  case Instruction::Store:
-    Ty = I.getOperand(1)->getType();  // Encode the pointer type...
-    assert(isa<PointerType>(Ty) && "Store to nonpointer type!?!?");
-    break;
-  default:              // Otherwise use the default behavior...
-    Ty = NumOperands ? I.getOperand(0)->getType() : I.getType();
-    break;
-  }
-
-  unsigned Type = Table.getTypeSlot(Ty);
-
-  // Varargs calls and invokes are encoded entirely different from any other
-  // instructions.
-  if (const CallInst *CI = dyn_cast<CallInst>(&I)){
-    const PointerType *Ty =cast<PointerType>(CI->getCalledValue()->getType());
-    if (cast<FunctionType>(Ty->getElementType())->isVarArg()) {
-      outputInstrVarArgsCall(CI, Opcode, Table, Type);
-      return;
-    }
-  } else if (const InvokeInst *II = dyn_cast<InvokeInst>(&I)) {
-    const PointerType *Ty =cast<PointerType>(II->getCalledValue()->getType());
-    if (cast<FunctionType>(Ty->getElementType())->isVarArg()) {
-      outputInstrVarArgsCall(II, Opcode, Table, Type);
-      return;
-    }
-  }
-
-  if (NumOperands <= 3) {
-    // Make sure that we take the type number into consideration.  We don't want
-    // to overflow the field size for the instruction format we select.
-    //
-    unsigned MaxOpSlot = Type;
-    unsigned Slots[3]; Slots[0] = (1 << 12)-1;   // Marker to signify 0 operands
-
-    for (unsigned i = 0; i != NumOperands; ++i) {
-      unsigned Slot = Table.getSlot(I.getOperand(i));
-      if (Slot > MaxOpSlot) MaxOpSlot = Slot;
-      Slots[i] = Slot;
-    }
-
-    // Handle the special cases for various instructions...
-    if (isa<CastInst>(I) || isa<VAArgInst>(I)) {
-      // Cast has to encode the destination type as the second argument in the
-      // packet, or else we won't know what type to cast to!
-      Slots[1] = Table.getTypeSlot(I.getType());
-      if (Slots[1] > MaxOpSlot) MaxOpSlot = Slots[1];
-      NumOperands++;
-    } else if (const AllocationInst *AI = dyn_cast<AllocationInst>(&I)) {
-      assert(NumOperands == 1 && "Bogus allocation!");
-      if (AI->getAlignment()) {
-        Slots[1] = Log2_32(AI->getAlignment())+1;
-        if (Slots[1] > MaxOpSlot) MaxOpSlot = Slots[1];
-        NumOperands = 2;
-      }
-    } else if (isa<ICmpInst>(I) || isa<FCmpInst>(I)) {
-      // We need to encode the compare instruction's predicate as the third
-      // operand. Its not really a slot, but we don't want to break the 
-      // instruction format for these instructions.
-      NumOperands++;
-      assert(NumOperands == 3 && "CmpInst with wrong number of operands?");
-      Slots[2] = unsigned(cast<CmpInst>(&I)->getPredicate());
-      if (Slots[2] > MaxOpSlot)
-        MaxOpSlot = Slots[2];
-    } else if (const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(&I)) {
-      // We need to encode the type of sequential type indices into their slot #
-      unsigned Idx = 1;
-      for (gep_type_iterator I = gep_type_begin(GEP), E = gep_type_end(GEP);
-           I != E; ++I, ++Idx)
-        if (isa<SequentialType>(*I)) {
-          // These should be either 32-bits or 64-bits, however, with bit
-          // accurate types we just distinguish between less than or equal to
-          // 32-bits or greater than 32-bits.
-          unsigned BitWidth = 
-            cast<IntegerType>(GEP->getOperand(Idx)->getType())->getBitWidth();
-          assert(BitWidth == 32 || BitWidth == 64 && 
-                 "Invalid bitwidth for GEP index");
-          unsigned IdxId = BitWidth == 32 ? 0 : 1;
-          Slots[Idx] = (Slots[Idx] << 1) | IdxId;
-          if (Slots[Idx] > MaxOpSlot) MaxOpSlot = Slots[Idx];
-        }
-    } else if (Opcode == 58) {
-      // If this is the escape sequence for call, emit the tailcall/cc info.
-      const CallInst &CI = cast<CallInst>(I);
-      ++NumOperands;
-      if (NumOperands <= 3) {
-        Slots[NumOperands-1] =
-          (CI.getCallingConv() << 1)|unsigned(CI.isTailCall());
-        if (Slots[NumOperands-1] > MaxOpSlot)
-          MaxOpSlot = Slots[NumOperands-1];
-      }
-    } else if (isa<InvokeInst>(I)) {
-      // Invoke escape seq has at least 4 operands to encode.
-      ++NumOperands;
-    } else if (const LoadInst *LI = dyn_cast<LoadInst>(&I)) {
-      // Encode attributed load as opcode 62
-      // We need to encode the attributes of the load instruction as the second
-      // operand. Its not really a slot, but we don't want to break the 
-      // instruction format for these instructions.
-      if (LI->getAlignment() || LI->isVolatile()) {
-        NumOperands = 2;
-        Slots[1] = ((Log2_32(LI->getAlignment())+1)<<1) + 
-                    (LI->isVolatile() ? 1 : 0);
-        if (Slots[1] > MaxOpSlot) 
-          MaxOpSlot = Slots[1];
-        Opcode = 62;
-      }
-    } else if (const StoreInst *SI = dyn_cast<StoreInst>(&I)) {
-      // Encode attributed store as opcode 63
-      // We need to encode the attributes of the store instruction as the third
-      // operand. Its not really a slot, but we don't want to break the 
-      // instruction format for these instructions.
-      if (SI->getAlignment() || SI->isVolatile()) {
-        NumOperands = 3;
-        Slots[2] = ((Log2_32(SI->getAlignment())+1)<<1) + 
-                    (SI->isVolatile() ? 1 : 0);
-        if (Slots[2] > MaxOpSlot) 
-          MaxOpSlot = Slots[2];
-        Opcode = 63;
-      }
-    }
-
-    // Decide which instruction encoding to use.  This is determined primarily
-    // by the number of operands, and secondarily by whether or not the max
-    // operand will fit into the instruction encoding.  More operands == fewer
-    // bits per operand.
-    //
-    switch (NumOperands) {
-    case 0:
-    case 1:
-      if (MaxOpSlot < (1 << 12)-1) { // -1 because we use 4095 to indicate 0 ops
-        outputInstructionFormat1(&I, Opcode, Slots, Type);
-        return;
-      }
-      break;
-
-    case 2:
-      if (MaxOpSlot < (1 << 8)) {
-        outputInstructionFormat2(&I, Opcode, Slots, Type);
-        return;
-      }
-      break;
-
-    case 3:
-      if (MaxOpSlot < (1 << 6)) {
-        outputInstructionFormat3(&I, Opcode, Slots, Type);
-        return;
-      }
-      break;
-    default:
-      break;
-    }
-  }
-
-  // If we weren't handled before here, we either have a large number of
-  // operands or a large operand index that we are referring to.
-  outputInstructionFormat0(&I, Opcode, Table, Type);
-}
-
-//===----------------------------------------------------------------------===//
-//===                              Block Output                            ===//
-//===----------------------------------------------------------------------===//
-
-BytecodeWriter::BytecodeWriter(std::vector<unsigned char> &o, const Module *M)
-  : Out(o), Table(M) {
-
-  // Emit the signature...
-  static const unsigned char *Sig = (const unsigned char*)"llvm";
-  output_data(Sig, Sig+4);
-
-  // Emit the top level CLASS block.
-  BytecodeBlock ModuleBlock(BytecodeFormat::ModuleBlockID, *this, false, true);
-
-  // Output the version identifier
-  output_vbr(BCVersionNum);
-
-  // The Global type plane comes first
-  {
-    BytecodeBlock CPool(BytecodeFormat::GlobalTypePlaneBlockID, *this);
-    outputTypes(Type::FirstDerivedTyID);
-  }
-
-  // The ModuleInfoBlock follows directly after the type information
-  outputModuleInfoBlock(M);
-
-  // Output module level constants, used for global variable initializers
-  outputConstants();
-
-  // Do the whole module now! Process each function at a time...
-  for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
-    outputFunction(I);
-
-  // Output the symbole table for types
-  outputTypeSymbolTable(M->getTypeSymbolTable());
-
-  // Output the symbol table for values
-  outputValueSymbolTable(M->getValueSymbolTable());
-}
-
-void BytecodeWriter::outputTypes(unsigned TypeNum) {
-  // Write the type plane for types first because earlier planes (e.g. for a
-  // primitive type like float) may have constants constructed using types
-  // coming later (e.g., via getelementptr from a pointer type).  The type
-  // plane is needed before types can be fwd or bkwd referenced.
-  const std::vector<const Type*>& Types = Table.getTypes();
-  assert(!Types.empty() && "No types at all?");
-  assert(TypeNum <= Types.size() && "Invalid TypeNo index");
-
-  unsigned NumEntries = Types.size() - TypeNum;
-
-  // Output type header: [num entries]
-  output_vbr(NumEntries);
-
-  for (unsigned i = TypeNum; i < TypeNum+NumEntries; ++i)
-    outputType(Types[i]);
-}
-
-// Helper function for outputConstants().
-// Writes out all the constants in the plane Plane starting at entry StartNo.
-//
-void BytecodeWriter::outputConstantsInPlane(const Value *const *Plane,
-                                            unsigned PlaneSize,
-                                            unsigned StartNo) {
-  unsigned ValNo = StartNo;
-
-  // Scan through and ignore function arguments, global values, and constant
-  // strings.
-  for (; ValNo < PlaneSize &&
-         (isa<Argument>(Plane[ValNo]) || isa<GlobalValue>(Plane[ValNo]) ||
-          (isa<ConstantArray>(Plane[ValNo]) &&
-           cast<ConstantArray>(Plane[ValNo])->isString())); ValNo++)
-    /*empty*/;
-
-  unsigned NC = ValNo;              // Number of constants
-  for (; NC < PlaneSize && (isa<Constant>(Plane[NC]) || 
-                              isa<InlineAsm>(Plane[NC])); NC++)
-    /*empty*/;
-  NC -= ValNo;                      // Convert from index into count
-  if (NC == 0) return;              // Skip empty type planes...
-
-  // FIXME: Most slabs only have 1 or 2 entries!  We should encode this much
-  // more compactly.
-
-  // Put out type header: [num entries][type id number]
-  //
-  output_vbr(NC);
-
-  // Put out the Type ID Number.
-  output_typeid(Table.getTypeSlot(Plane[0]->getType()));
-
-  for (unsigned i = ValNo; i < ValNo+NC; ++i) {
-    const Value *V = Plane[i];
-    if (const Constant *C = dyn_cast<Constant>(V))
-      outputConstant(C);
-    else
-      outputInlineAsm(cast<InlineAsm>(V));
-  }
-}
-
-static inline bool hasNullValue(const Type *Ty) {
-  return Ty != Type::LabelTy && Ty != Type::VoidTy && !isa<OpaqueType>(Ty);
-}
-
-void BytecodeWriter::outputConstants() {
-  BytecodeBlock CPool(BytecodeFormat::ConstantPoolBlockID, *this,
-                      true  /* Elide block if empty */);
-
-  unsigned NumPlanes = Table.getNumPlanes();
-
-  // Output module-level string constants before any other constants.
-  outputConstantStrings();
-
-  for (unsigned pno = 0; pno != NumPlanes; pno++) {
-    const SlotCalculator::TypePlane &Plane = Table.getPlane(pno);
-    if (