Breaking up the PowerPC target into 32- and 64-bit subparts, Part III: the rest.

llvm-svn: 15636

1 files changed, 0 insertions, 735 deletions

diff --git a/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
deleted file mode 100644
index b52f055c8cf..00000000000
--- a/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
+++ /dev/null
@@ -1,735 +0,0 @@
-//===-- PowerPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --===//
-// 
-//                     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 file contains a printer that converts from our internal representation
-// of machine-dependent LLVM code to PowerPC assembly language. This printer is
-// the output mechanism used by `llc'.
-//
-// Documentation at http://developer.apple.com/documentation/DeveloperTools/
-// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "asmprinter"
-#include "PowerPC.h"
-#include "PowerPCInstrInfo.h"
-#include "PowerPCTargetMachine.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Module.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/Mangler.h"
-#include "Support/CommandLine.h"
-#include "Support/Debug.h"
-#include "Support/Statistic.h"
-#include "Support/StringExtras.h"
-#include <set>
-
-namespace llvm {
-
-namespace {
-  Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
-
-  struct Printer : public MachineFunctionPass {
-    /// Output stream on which we're printing assembly code.
-    ///
-    std::ostream &O;
-
-    /// Target machine description which we query for reg. names, data
-    /// layout, etc.
-    ///
-    PowerPCTargetMachine &TM;
-
-    /// Name-mangler for global names.
-    ///
-    Mangler *Mang;
-    std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
-    std::set<std::string> Strings;
-
-    Printer(std::ostream &o, TargetMachine &tm) : O(o),
-      TM(reinterpret_cast<PowerPCTargetMachine&>(tm)), LabelNumber(0) {}
-
-    /// Cache of mangled name for current function. This is
-    /// recalculated at the beginning of each call to
-    /// runOnMachineFunction().
-    ///
-    std::string CurrentFnName;
-
-    /// Unique incrementer for label values for referencing Global values.
-    ///
-    unsigned LabelNumber;
-  
-    virtual const char *getPassName() const {
-      return "PowerPC Assembly Printer";
-    }
-
-    void printMachineInstruction(const MachineInstr *MI);
-    void printOp(const MachineOperand &MO, bool elideOffsetKeyword = false);
-    void printImmOp(const MachineOperand &MO, unsigned ArgType);
-    void printConstantPool(MachineConstantPool *MCP);
-    bool runOnMachineFunction(MachineFunction &F);    
-    bool doInitialization(Module &M);
-    bool doFinalization(Module &M);
-    void emitGlobalConstant(const Constant* CV);
-    void emitConstantValueOnly(const Constant *CV);
-  };
-} // end of anonymous namespace
-
-/// createPPCAsmPrinterPass - Returns a pass that prints the PPC
-/// assembly code for a MachineFunction to the given output stream,
-/// using the given target machine description.  This should work
-/// regardless of whether the function is in SSA form or not.
-///
-FunctionPass *createPPCAsmPrinterPass(std::ostream &o,TargetMachine &tm) {
-  return new Printer(o, tm);
-}
-
-/// isStringCompatible - Can we treat the specified array as a string?
-/// Only if it is an array of ubytes or non-negative sbytes.
-///
-static bool isStringCompatible(const ConstantArray *CVA) {
-  const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
-  if (ETy == Type::UByteTy) return true;
-  if (ETy != Type::SByteTy) return false;
-
-  for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
-    if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
-      return false;
-
-  return true;
-}
-
-/// toOctal - Convert the low order bits of X into an octal digit.
-///
-static inline char toOctal(int X) {
-  return (X&7)+'0';
-}
-
-/// getAsCString - Return the specified array as a C compatible
-/// string, only if the predicate isStringCompatible is true.
-///
-static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
-  assert(isStringCompatible(CVA) && "Array is not string compatible!");
-
-  O << "\"";
-  for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
-    unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
-
-    if (C == '"') {
-      O << "\\\"";
-    } else if (C == '\\') {
-      O << "\\\\";
-    } else if (isprint(C)) {
-      O << C;
-    } else {
-      switch (C) {
-      case '\b': O << "\\b"; break;
-      case '\f': O << "\\f"; break;
-      case '\n': O << "\\n"; break;
-      case '\r': O << "\\r"; break;
-      case '\t': O << "\\t"; break;
-      default:
-        O << '\\';
-        O << toOctal(C >> 6);
-        O << toOctal(C >> 3);
-        O << toOctal(C >> 0);
-        break;
-      }
-    }
-  }
-  O << "\"";
-}
-
-// Print out the specified constant, without a storage class.  Only the
-// constants valid in constant expressions can occur here.
-void Printer::emitConstantValueOnly(const Constant *CV) {
-  if (CV->isNullValue())
-    O << "0";
-  else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
-    assert(CB == ConstantBool::True);
-    O << "1";
-  } else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
-    O << CI->getValue();
-  else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
-    O << CI->getValue();
-  else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
-    // This is a constant address for a global variable or function.  Use the
-    // name of the variable or function as the address value.
-    O << Mang->getValueName(GV);
-  else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
-    const TargetData &TD = TM.getTargetData();
-    switch (CE->getOpcode()) {
-    case Instruction::GetElementPtr: {
-      // generate a symbolic expression for the byte address
-      const Constant *ptrVal = CE->getOperand(0);
-      std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
-      if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
-        O << "(";
-        emitConstantValueOnly(ptrVal);
-        O << ") + " << Offset;
-      } else {
-        emitConstantValueOnly(ptrVal);
-      }
-      break;
-    }
-    case Instruction::Cast: {
-      // Support only non-converting or widening casts for now, that is, ones
-      // that do not involve a change in value.  This assertion is really gross,
-      // and may not even be a complete check.
-      Constant *Op = CE->getOperand(0);
-      const Type *OpTy = Op->getType(), *Ty = CE->getType();
-
-      // Remember, kids, pointers on x86 can be losslessly converted back and
-      // forth into 32-bit or wider integers, regardless of signedness. :-P
-      assert(((isa<PointerType>(OpTy)
-               && (Ty == Type::LongTy || Ty == Type::ULongTy
-                   || Ty == Type::IntTy || Ty == Type::UIntTy))
-              || (isa<PointerType>(Ty)
-                  && (OpTy == Type::LongTy || OpTy == Type::ULongTy
-                      || OpTy == Type::IntTy || OpTy == Type::UIntTy))
-              || (((TD.getTypeSize(Ty) >= TD.getTypeSize(OpTy))
-                   && OpTy->isLosslesslyConvertibleTo(Ty))))
-             && "FIXME: Don't yet support this kind of constant cast expr");
-      O << "(";
-      emitConstantValueOnly(Op);
-      O << ")";
-      break;
-    }
-    case Instruction::Add:
-      O << "(";
-      emitConstantValueOnly(CE->getOperand(0));
-      O << ") + (";
-      emitConstantValueOnly(CE->getOperand(1));
-      O << ")";
-      break;
-    default:
-      assert(0 && "Unsupported operator!");
-    }
-  } else {
-    assert(0 && "Unknown constant value!");
-  }
-}
-
-// Print a constant value or values, with the appropriate storage class as a
-// prefix.
-void Printer::emitGlobalConstant(const Constant *CV) {  
-  const TargetData &TD = TM.getTargetData();
-
-  if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
-    if (isStringCompatible(CVA)) {
-      O << "\t.ascii ";
-      printAsCString(O, CVA);
-      O << "\n";
-    } else { // Not a string.  Print the values in successive locations
-      for (unsigned i=0, e = CVA->getNumOperands(); i != e; i++)
-        emitGlobalConstant(CVA->getOperand(i));
-    }
-    return;
-  } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
-    // Print the fields in successive locations. Pad to align if needed!
-    const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
-    unsigned sizeSoFar = 0;
-    for (unsigned i = 0, e = CVS->getNumOperands(); i != e; i++) {
-      const Constant* field = CVS->getOperand(i);
-
-      // Check if padding is needed and insert one or more 0s.
-      unsigned fieldSize = TD.getTypeSize(field->getType());
-      unsigned padSize = ((i == e-1? cvsLayout->StructSize
-                           : cvsLayout->MemberOffsets[i+1])
-                          - cvsLayout->MemberOffsets[i]) - fieldSize;
-      sizeSoFar += fieldSize + padSize;
-
-      // Now print the actual field value
-      emitGlobalConstant(field);
-
-      // Insert the field padding unless it's zero bytes...
-      if (padSize)
-        O << "\t.space\t " << padSize << "\n";      
-    }
-    assert(sizeSoFar == cvsLayout->StructSize &&
-           "Layout of constant struct may be incorrect!");
-    return;
-  } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
-    // FP Constants are printed as integer constants to avoid losing
-    // precision...
-    double Val = CFP->getValue();
-    switch (CFP->getType()->getTypeID()) {
-    default: assert(0 && "Unknown floating point type!");
-    case Type::FloatTyID: {
-      union FU {                            // Abide by C TBAA rules
-        float FVal;
-        unsigned UVal;
-      } U;
-      U.FVal = Val;
-      O << ".long\t" << U.UVal << "\t; float " << Val << "\n";
-      return;
-    }
-    case Type::DoubleTyID: {
-      union DU {                            // Abide by C TBAA rules
-        double FVal;
-        uint64_t UVal;
-        struct {
-          uint32_t MSWord;
-          uint32_t LSWord;
-        } T;
-      } U;
-      U.FVal = Val;
-      
-      O << ".long\t" << U.T.MSWord << "\t; double most significant word " 
-        << Val << "\n";
-      O << ".long\t" << U.T.LSWord << "\t; double least significant word " 
-        << Val << "\n";
-      return;
-    }
-    }
-  } else if (CV->getType() == Type::ULongTy || CV->getType() == Type::LongTy) {
-    if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
-      union DU {                            // Abide by C TBAA rules
-        int64_t UVal;
-        struct {
-          uint32_t MSWord;
-          uint32_t LSWord;
-        } T;
-      } U;
-      U.UVal = CI->getRawValue();
-        
-      O << ".long\t" << U.T.MSWord << "\t; Double-word most significant word " 
-        << U.UVal << "\n";
-      O << ".long\t" << U.T.LSWord << "\t; Double-word least significant word " 
-        << U.UVal << "\n";
-      return;
-    }
-  }
-
-  const Type *type = CV->getType();
-  O << "\t";
-  switch (type->getTypeID()) {
-  case Type::UByteTyID: case Type::SByteTyID:
-    O << ".byte";
-    break;
-  case Type::UShortTyID: case Type::ShortTyID:
-    O << ".short";
-    break;
-  case Type::BoolTyID: 
-  case Type::PointerTyID:
-  case Type::UIntTyID: case Type::IntTyID:
-    O << ".long";
-    break;
-  case Type::ULongTyID: case Type::LongTyID:    
-    assert (0 && "Should have already output double-word constant.");
-  case Type::FloatTyID: case Type::DoubleTyID:
-    assert (0 && "Should have already output floating point constant.");
-  default:
-    if (CV == Constant::getNullValue(type)) {  // Zero initializer?
-      O << ".space\t" << TD.getTypeSize(type) << "\n";      
-      return;
-    }
-    std::cerr << "Can't handle printing: " << *CV;
-    abort();
-    break;
-  }
-  O << "\t";
-  emitConstantValueOnly(CV);
-  O << "\n";
-}
-
-/// printConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
-///
-void Printer::printConstantPool(MachineConstantPool *MCP) {
-  const std::vector<Constant*> &CP = MCP->getConstants();
-  const TargetData &TD = TM.getTargetData();
- 
-  if (CP.empty()) return;
-
-  for (unsigned i = 0, e = CP.size(); i != e; ++i) {
-    O << "\t.const\n";
-    O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
-      << "\n";
-    O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;"
-      << *CP[i] << "\n";
-    emitGlobalConstant(CP[i]);
-  }
-}
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool Printer::runOnMachineFunction(MachineFunction &MF) {
-  O << "\n\n";
-  // What's my mangled name?
-  CurrentFnName = Mang->getValueName(MF.getFunction());
-
-  // Print out constants referenced by the function
-  printConstantPool(MF.getConstantPool());
-
-  // Print out labels for the function.
-  O << "\t.text\n"; 
-  O << "\t.globl\t" << CurrentFnName << "\n";
-  O << "\t.align 2\n";
-  O << CurrentFnName << ":\n";
-
-  // Print out code for the function.
-  for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
-       I != E; ++I) {
-    // Print a label for the basic block.
-    O << ".LBB" << CurrentFnName << "_" << I->getNumber() << ":\t; "
-      << I->getBasicBlock()->getName() << "\n";
-    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
-      II != E; ++II) {
-      // Print the assembly for the instruction.
-      O << "\t";
-      printMachineInstruction(II);
-    }
-  }
-  ++LabelNumber;
-
-  // We didn't modify anything.
-  return false;
-}
-
-void Printer::printOp(const MachineOperand &MO,
-                      bool elideOffsetKeyword /* = false */) {
-  const MRegisterInfo &RI = *TM.getRegisterInfo();
-  int new_symbol;
-  
-  switch (MO.getType()) {
-  case MachineOperand::MO_VirtualRegister:
-    if (Value *V = MO.getVRegValueOrNull()) {
-      O << "<" << V->getName() << ">";
-      return;
-    }
-    // FALLTHROUGH
-  case MachineOperand::MO_MachineRegister:
-  case MachineOperand::MO_CCRegister:
-    O << LowercaseString(RI.get(MO.getReg()).Name);
-    return;
-
-  case MachineOperand::MO_SignExtendedImmed:
-  case MachineOperand::MO_UnextendedImmed:
-    std::cerr << "printOp() does not handle immediate values\n";
-    abort();
-    return;
-
-  case MachineOperand::MO_PCRelativeDisp:
-    std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
-    abort();
-    return;
-    
-  case MachineOperand::MO_MachineBasicBlock: {
-    MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
-    O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
-      << "_" << MBBOp->getNumber() << "\t; "
-      << MBBOp->getBasicBlock()->getName();
-    return;
-  }
-
-  case MachineOperand::MO_ConstantPoolIndex:
-    O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
-    return;
-
-  case MachineOperand::MO_ExternalSymbol:
-    O << MO.getSymbolName();
-    return;
-
-  case MachineOperand::MO_GlobalAddress:
-    if (!elideOffsetKeyword) {
-      GlobalValue *GV = MO.getGlobal();
-      std::string Name = Mang->getValueName(GV);
-
-      // Dynamically-resolved functions need a stub for the function
-      Function *F = dyn_cast<Function>(GV);
-      if (F && F->isExternal() &&
-          TM.CalledFunctions.find(F) != TM.CalledFunctions.end()) {
-        FnStubs.insert(Name);
-        O << "L" << Name << "$stub";
-        return;
-      }
-            
-      // External global variables need a non-lazily-resolved stub
-      if (!GV->hasInternalLinkage() &&
-          TM.AddressTaken.find(GV) != TM.AddressTaken.end()) {
-        GVStubs.insert(Name);
-        O << "L" << Name << "$non_lazy_ptr";
-        return;
-      }
-            
-      O << Mang->getValueName(GV);
-    }
-    return;
-    
-  default:
-    O << "<unknown operand type: " << MO.getType() << ">";
-    return;
-  }
-}
-
-void Printer::printImmOp(const MachineOperand &MO, unsigned ArgType) {
-  int Imm = MO.getImmedValue();
-  if (ArgType == PPCII::Simm16 || ArgType == PPCII::Disimm16) {
-    O << (short)Imm;
-  } else if (ArgType == PPCII::Zimm16) {
-    O << (unsigned short)Imm;
-  } else {
-    O << Imm;
-  }
-}
-
-/// printMachineInstruction -- Print out a single PPC LLVM instruction
-/// MI in Darwin syntax to the current output stream.
-///
-void Printer::printMachineInstruction(const MachineInstr *MI) {
-  unsigned Opcode = MI->getOpcode();
-  const TargetInstrInfo &TII = *TM.getInstrInfo();
-  const TargetInstrDescriptor &Desc = TII.get(Opcode);
-  unsigned i;
-
-  unsigned ArgCount = MI->getNumOperands();
-  unsigned ArgType[] = {
-    (Desc.TSFlags >> PPCII::Arg0TypeShift) & PPCII::ArgTypeMask,
-    (Desc.TSFlags >> PPCII::Arg1TypeShift) & PPCII::ArgTypeMask,
-    (Desc.TSFlags >> PPCII::Arg2TypeShift) & PPCII::ArgTypeMask,
-    (Desc.TSFlags >> PPCII::Arg3TypeShift) & PPCII::ArgTypeMask,
-    (Desc.TSFlags >> PPCII::Arg4TypeShift) & PPCII::ArgTypeMask
-  };
-  assert(((Desc.TSFlags & PPCII::VMX) == 0) &&
-         "Instruction requires VMX support");
-  assert(((Desc.TSFlags & PPCII::PPC64) == 0) &&
-         "Instruction requires 64 bit support");
-  ++EmittedInsts;
-
-  // CALLpcrel and CALLindirect are handled specially here to print only the
-  // appropriate number of args that the assembler expects.  This is because
-  // may have many arguments appended to record the uses of registers that are
-  // holding arguments to the called function.
-  if (Opcode == PPC::COND_BRANCH) {
-    std::cerr << "Error: untranslated conditional branch psuedo instruction!\n";
-    abort();
-  } else if (Opcode == PPC::IMPLICIT_DEF) {
-    O << "; IMPLICIT DEF ";
-    printOp(MI->getOperand(0));
-    O << "\n";
-    return;
-  } else if (Opcode == PPC::CALLpcrel) {
-    O << TII.getName(Opcode) << " ";
-    printOp(MI->getOperand(0));
-    O << "\n";
-    return;
-  } else if (Opcode == PPC::CALLindirect) {
-    O << TII.getName(Opcode) << " ";
-    printImmOp(MI->getOperand(0), ArgType[0]);
-    O << ", ";
-    printImmOp(MI->getOperand(1), ArgType[0]);
-    O << "\n";
-    return;
-  } else if (Opcode == PPC::MovePCtoLR) {
-    // FIXME: should probably be converted to cout.width and cout.fill
-    O << "bl \"L0000" << LabelNumber << "$pb\"\n";
-    O << "\"L0000" << LabelNumber << "$pb\":\n";
-    O << "\tmflr ";
-    printOp(MI->getOperand(0));
-    O << "\n";
-    return;
-  }
-
-  O << TII.getName(Opcode) << " ";
-  if (Opcode == PPC::LOADLoDirect || Opcode == PPC::LOADLoIndirect) {
-    printOp(MI->getOperand(0));
-    O << ", lo16(";
-    printOp(MI->getOperand(2));
-    O << "-\"L0000" << LabelNumber << "$pb\")";
-    O << "(";
-    if (MI->getOperand(1).getReg() == PPC::R0)
-      O << "0";
-    else
-      printOp(MI->getOperand(1));
-    O << ")\n";
-  } else if (Opcode == PPC::LOADHiAddr) {
-    printOp(MI->getOperand(0));
-    O << ", ";
-    if (MI->getOperand(1).getReg() == PPC::R0)
-      O << "0";
-    else
-      printOp(MI->getOperand(1));
-    O << ", ha16(" ;
-    printOp(MI->getOperand(2));
-     O << "-\"L0000" << LabelNumber << "$pb\")\n";
-  } else if (ArgCount == 3 && ArgType[1] == PPCII::Disimm16) {
-    printOp(MI->getOperand(0));
-    O << ", ";
-    printImmOp(MI->getOperand(1), ArgType[1]);
-    O << "(";
-    if (MI->getOperand(2).hasAllocatedReg() &&
-        MI->getOperand(2).getReg() == PPC::R0)
-      O << "0";
-    else
-      printOp(MI->getOperand(2));
-    O << ")\n";
-  } else {
-    for (i = 0; i < ArgCount; ++i) {
-      // addi and friends
-      if (i == 1 && ArgCount == 3 && ArgType[2] == PPCII::Simm16 &&
-          MI->getOperand(1).hasAllocatedReg() && 
-          MI->getOperand(1).getReg() == PPC::R0) {
-        O << "0";
-      // for long branch support, bc $+8
-      } else if (i == 1 && ArgCount == 2 && MI->getOperand(1).isImmediate() &&
-                 TII.isBranch(MI->getOpcode())) {
-        O << "$+8";
-        assert(8 == MI->getOperand(i).getImmedValue()
-          && "branch off PC not to pc+8?");
-        //printOp(MI->getOperand(i));
-      } else if (MI->getOperand(i).isImmediate()) {
-        printImmOp(MI->getOperand(i), ArgType[i]);
-      } else {
-        printOp(MI->getOperand(i));
-      }
-      if (ArgCount - 1 == i)
-        O << "\n";
-      else
-        O << ", ";
-    }
-  }
-}
-
-bool Printer::doInitialization(Module &M) {
-  Mang = new Mangler(M, true);
-  return false; // success
-}
-
-// SwitchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void SwitchSection(std::ostream &OS, std::string &CurSection,
-                          const char *NewSection) {
-  if (CurSection != NewSection) {
-    CurSection = NewSection;
-    if (!CurSection.empty())
-      OS << "\t" << NewSection << "\n";
-  }
-}
-
-bool Printer::doFinalization(Module &M) {
-  const TargetData &TD = TM.getTargetData();
-  std::string CurSection;
-
-  // Print out module-level global variables here.
-  for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
-    if (I->hasInitializer()) {   // External global require no code
-      O << "\n\n";
-      std::string name = Mang->getValueName(I);
-      Constant *C = I->getInitializer();
-      unsigned Size = TD.getTypeSize(C->getType());
-      unsigned Align = TD.getTypeAlignment(C->getType());
-
-      if (C->isNullValue() && /* FIXME: Verify correct */
-          (I->hasInternalLinkage() || I->hasWeakLinkage())) {
-        SwitchSection(O, CurSection, ".data");
-        if (I->hasInternalLinkage())
-          O << ".lcomm " << name << "," << TD.getTypeSize(C->getType())
-            << "," << (unsigned)TD.getTypeAlignment(C->getType());
-        else 
-          O << ".comm " << name << "," << TD.getTypeSize(C->getType());
-        O << "\t\t; ";
-        WriteAsOperand(O, I, true, true, &M);
-        O << "\n";
-      } else {
-        switch (I->getLinkage()) {
-        case GlobalValue::LinkOnceLinkage:
-          O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
-            << ".weak_definition " << name << '\n'
-            << ".private_extern " << name << '\n'
-            << ".section __DATA,__datacoal_nt,coalesced,no_toc\n";
-          LinkOnceStubs.insert(name);
-          break;  
-        case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
-          // Nonnull linkonce -> weak
-          O << "\t.weak " << name << "\n";
-          SwitchSection(O, CurSection, "");
-          O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
-          break;
-        case GlobalValue::AppendingLinkage:
-          // FIXME: appending linkage variables should go into a section of
-          // their name or something.  For now, just emit them as external.
-        case GlobalValue::ExternalLinkage:
-          // If external or appending, declare as a global symbol
-          O << "\t.globl " << name << "\n";
-          // FALL THROUGH
-        case GlobalValue::InternalLinkage:
-          SwitchSection(O, CurSection, ".data");
-          break;
-        }
-
-        O << "\t.align " << Align << "\n";
-        O << name << ":\t\t\t\t; ";
-        WriteAsOperand(O, I, true, true, &M);
-        O << " = ";
-        WriteAsOperand(O, C, false, false, &M);
-        O << "\n";
-        emitGlobalConstant(C);
-      }
-    }
-
-  // Output stubs for link-once variables
-  if (LinkOnceStubs.begin() != LinkOnceStubs.end())
-    O << ".data\n.align 2\n";
-  for (std::set<std::string>::iterator i = LinkOnceStubs.begin(), 
-         e = LinkOnceStubs.end(); i != e; ++i) {
-    O << *i << "$non_lazy_ptr:\n"
-      << "\t.long\t" << *i << '\n';
-  }
-  
-  // Output stubs for dynamically-linked functions
-  for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end(); 
-       i != e; ++i)
-  {
-    O << ".data\n";
-    O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
-    O << "\t.align 2\n";
-    O << "L" << *i << "$stub:\n";
-    O << "\t.indirect_symbol " << *i << "\n";
-    O << "\tmflr r0\n";
-    O << "\tbcl 20,31,L0$" << *i << "\n";
-    O << "L0$" << *i << ":\n";
-    O << "\tmflr r11\n";
-    O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
-    O << "\tmtlr r0\n";
-    O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
-    O << "\tmtctr r12\n";
-    O << "\tbctr\n";
-    O << ".data\n";
-    O << ".lazy_symbol_pointer\n";
-    O << "L" << *i << "$lazy_ptr:\n";
-    O << "\t.indirect_symbol " << *i << "\n";
-    O << "\t.long dyld_stub_binding_helper\n";
-  }
-
-  O << "\n";
-
-  // Output stubs for external global variables
-  if (GVStubs.begin() != GVStubs.end())
-    O << ".data\n.non_lazy_symbol_pointer\n";
-  for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end(); 
-       i != e; ++i) {
-    O << "L" << *i << "$non_lazy_ptr:\n";
-    O << "\t.indirect_symbol " << *i << "\n";
-    O << "\t.long\t0\n";
-  }
-  
-  delete Mang;
-  return false; // success
-}
-
-} // End llvm namespace