lib/Target/PowerPC/PPCAsmPrinter.cpp - fp2-dev/platform/external/llvm - Gitiles

 //===-- Printer.cpp - Convert LLVM code 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' and `lli -print-machineinstrs'.
 //
 // 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 "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.
     ///
     TargetMachine &TM;

     /// Name-mangler for global names.
     ///
     Mangler *Mang;
     std::set<std::string> FnStubs, GVStubs;
     std::set<std::string> Strings;

     Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(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 int labelNumber;

     virtual const char *getPassName() const {
       return "PowerPC Assembly Printer";
     }

     void printMachineInstruction(const MachineInstr *MI);
     void printOp(const MachineOperand &MO, bool elideOffsetKeyword = false);
     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

 /// createPPCCodePrinterPass - 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.
 ///
 FunctionPass *createPPCCodePrinterPass(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 (CV->isNullValue()) {
     O << "\t.space\t " << TD.getTypeSize(CV->getType()) << "\n";
     return;
   } else 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
       const std::vector<Use> &constValues = CVA->getValues();
       for (unsigned i=0; i < constValues.size(); i++)
         emitGlobalConstant(cast<Constant>(constValues[i].get()));
     }
     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());
     const std::vector<Use>& constValues = CVS->getValues();
     unsigned sizeSoFar = 0;
     for (unsigned i=0, N = constValues.size(); i < N; i++) {
       const Constant* field = cast<Constant>(constValues[i].get());

       // Check if padding is needed and insert one or more 0s.
       unsigned fieldSize = TD.getTypeSize(field->getType());
       unsigned padSize = ((i == N-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()->getPrimitiveSize() == 64) {
     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:
     assert (0 && "Can't handle printing this type of thing");
     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);
     }
   }

   // 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:
     O << (int)MO.getImmedValue();
     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()) {
         FnStubs.insert(Name);
         O << "L" << Name << "$stub";
       } else {
         GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
         // External global variables need a non-lazily-resolved stub
         if (GVar && GVar->isExternal()) {
           GVStubs.insert(Name);
           O << "L" << Name << "$non_lazy_ptr";
         } else
           O << Mang->getValueName(GV);
       }
     }
     return;

   default:
     O << "<unknown operand type: " << MO.getType() << ">";
     return;
   }
 }

 /// printMachineInstruction -- Print out a single PPC32 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 int i;

   unsigned int ArgCount = MI->getNumOperands();
     //Desc.TSFlags & PPC32II::ArgCountMask;
   unsigned int ArgType[] = {
     (Desc.TSFlags >> PPC32II::Arg0TypeShift) & PPC32II::ArgTypeMask,
     (Desc.TSFlags >> PPC32II::Arg1TypeShift) & PPC32II::ArgTypeMask,
     (Desc.TSFlags >> PPC32II::Arg2TypeShift) & PPC32II::ArgTypeMask,
     (Desc.TSFlags >> PPC32II::Arg3TypeShift) & PPC32II::ArgTypeMask,
     (Desc.TSFlags >> PPC32II::Arg4TypeShift) & PPC32II::ArgTypeMask
   };
   assert(((Desc.TSFlags & PPC32II::VMX) == 0) &&
          "Instruction requires VMX support");
   assert(((Desc.TSFlags & PPC32II::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 == PPC32::IMPLICIT_DEF) {
     O << "; IMPLICIT DEF ";
     printOp(MI->getOperand(0));
     O << "\n";
     return;
   } else if (Opcode == PPC32::CALLpcrel) {
     O << TII.getName(MI->getOpcode()) << " ";
     printOp(MI->getOperand(0));
     O << "\n";
     return;
   } else if (Opcode == PPC32::CALLindirect) {
     O << TII.getName(MI->getOpcode()) << " ";
     printOp(MI->getOperand(0));
     O << ", ";
     printOp(MI->getOperand(1));
     O << "\n";
     return;
   } else if (Opcode == PPC32::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(MI->getOpcode()) << " ";
   if (Opcode == PPC32::LOADLoAddr) {
     printOp(MI->getOperand(0));
     O << ", lo16(";
     printOp(MI->getOperand(2));
     O << "-\"L0000" << labelNumber << "$pb\")";
     labelNumber++;
     O << "(";
     if (MI->getOperand(1).getReg() == PPC32::R0)
       O << "0";
     else
       printOp(MI->getOperand(1));
     O << ")\n";
   } else if (Opcode == PPC32::LOADHiAddr) {
     printOp(MI->getOperand(0));
     O << ", ";
     if (MI->getOperand(1).getReg() == PPC32::R0)
       O << "0";
     else
       printOp(MI->getOperand(1));
     O << ", ha16(" ;
     printOp(MI->getOperand(2));
      O << "-\"L0000" << labelNumber << "$pb\")\n";
   } else if (ArgCount == 3 && ArgType[1] == PPC32II::Disimm16) {
     printOp(MI->getOperand(0));
     O << ", ";
     printOp(MI->getOperand(1));
     O << "(";
     if (MI->getOperand(2).hasAllocatedReg() &&
         MI->getOperand(2).getReg() == PPC32::R0)
       O << "0";
     else
       printOp(MI->getOperand(2));
     O << ")\n";
   } else {
     for (i = 0; i < ArgCount; ++i) {
       if (i == 1 && ArgCount == 3 && ArgType[2] == PPC32II::Simm16 &&
           MI->getOperand(1).hasAllocatedReg() &&
           MI->getOperand(1).getReg() == PPC32::R0) {
         O << "0";
       } 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() &&
           (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
            I->hasWeakLinkage() /* FIXME: Verify correct */)) {
         SwitchSection(O, CurSection, ".data");
         if (I->hasInternalLinkage())
           O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
             << "," << (unsigned)TD.getTypeAlignment(C->getType());
         else
           O << "\t.comm " << name << "," << TD.getTypeSize(C->getType());
         O << "\t\t; ";
         WriteAsOperand(O, I, true, true, &M);
         O << "\n";
       } else {
         switch (I->getLinkage()) {
         case GlobalValue::LinkOnceLinkage:
         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 dynamically-linked functions
   for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
        i != e; ++i)
   {
     O << "\t.picsymbol_stub\n";
     O << "L" << *i << "$stub:\n";
     O << "\t.indirect_symbol " << *i << "\n";
     O << "\tmflr r0\n";
     O << "\tbl L0$" << *i << "\n";
     O << "L0$" << *i << ":\n";
     O << "\tmflr r11\n";
     O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
     O << "\tmtlr r0\n";
     O << "\tlwz r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
     O << "\tmtctr r12\n";
     O << "\taddi r11,r11,lo16(L" << *i << "$lazy_ptr - L0$" << *i << ")\n";
     O << "\tbctr\n";
     O << ".data\n";
     O << ".lazy_symbol_pointer\n";
     O << "L" << *i << "$lazy_ptr:\n";
     O << ".indirect_symbol " << *i << "\n";
     O << ".long dyld_stub_binding_helper\n";
   }

   O << "\n";

   // Output stubs for external global variables
   if (GVStubs.begin() != GVStubs.end())
     O << "\t.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
	//===-- Printer.cpp - Convert LLVM code 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' and `lli -print-machineinstrs'.
	//
	// 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 "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.
	///
	TargetMachine &TM;

	/// Name-mangler for global names.
	///
	Mangler *Mang;
	std::set<std::string> FnStubs, GVStubs;
	std::set<std::string> Strings;

	Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(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 int labelNumber;

	virtual const char *getPassName() const {
	return "PowerPC Assembly Printer";
	}

	void printMachineInstruction(const MachineInstr *MI);
	void printOp(const MachineOperand &MO, bool elideOffsetKeyword = false);
	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

	/// createPPCCodePrinterPass - 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.
	///
	FunctionPass *createPPCCodePrinterPass(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 (CV->isNullValue()) {
	O << "\t.space\t " << TD.getTypeSize(CV->getType()) << "\n";
	return;
	} else 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
	const std::vector<Use> &constValues = CVA->getValues();
	for (unsigned i=0; i < constValues.size(); i++)
	emitGlobalConstant(cast<Constant>(constValues[i].get()));
	}
	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());
	const std::vector<Use>& constValues = CVS->getValues();
	unsigned sizeSoFar = 0;
	for (unsigned i=0, N = constValues.size(); i < N; i++) {
	const Constant* field = cast<Constant>(constValues[i].get());

	// Check if padding is needed and insert one or more 0s.
	unsigned fieldSize = TD.getTypeSize(field->getType());
	unsigned padSize = ((i == N-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()->getPrimitiveSize() == 64) {
	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:
	assert (0 && "Can't handle printing this type of thing");
	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);
	}
	}

	// 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:
	O << (int)MO.getImmedValue();
	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()) {
	FnStubs.insert(Name);
	O << "L" << Name << "$stub";
	} else {
	GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
	// External global variables need a non-lazily-resolved stub
	if (GVar && GVar->isExternal()) {
	GVStubs.insert(Name);
	O << "L" << Name << "$non_lazy_ptr";
	} else
	O << Mang->getValueName(GV);
	}
	}
	return;

	default:
	O << "<unknown operand type: " << MO.getType() << ">";
	return;
	}
	}

	/// printMachineInstruction -- Print out a single PPC32 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 int i;

	unsigned int ArgCount = MI->getNumOperands();
	//Desc.TSFlags & PPC32II::ArgCountMask;
	unsigned int ArgType[] = {
	(Desc.TSFlags >> PPC32II::Arg0TypeShift) & PPC32II::ArgTypeMask,
	(Desc.TSFlags >> PPC32II::Arg1TypeShift) & PPC32II::ArgTypeMask,
	(Desc.TSFlags >> PPC32II::Arg2TypeShift) & PPC32II::ArgTypeMask,
	(Desc.TSFlags >> PPC32II::Arg3TypeShift) & PPC32II::ArgTypeMask,
	(Desc.TSFlags >> PPC32II::Arg4TypeShift) & PPC32II::ArgTypeMask
	};
	assert(((Desc.TSFlags & PPC32II::VMX) == 0) &&
	"Instruction requires VMX support");
	assert(((Desc.TSFlags & PPC32II::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 == PPC32::IMPLICIT_DEF) {
	O << "; IMPLICIT DEF ";
	printOp(MI->getOperand(0));
	O << "\n";
	return;
	} else if (Opcode == PPC32::CALLpcrel) {
	O << TII.getName(MI->getOpcode()) << " ";
	printOp(MI->getOperand(0));
	O << "\n";
	return;
	} else if (Opcode == PPC32::CALLindirect) {
	O << TII.getName(MI->getOpcode()) << " ";
	printOp(MI->getOperand(0));
	O << ", ";
	printOp(MI->getOperand(1));
	O << "\n";
	return;
	} else if (Opcode == PPC32::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(MI->getOpcode()) << " ";
	if (Opcode == PPC32::LOADLoAddr) {
	printOp(MI->getOperand(0));
	O << ", lo16(";
	printOp(MI->getOperand(2));
	O << "-\"L0000" << labelNumber << "$pb\")";
	labelNumber++;
	O << "(";
	if (MI->getOperand(1).getReg() == PPC32::R0)
	O << "0";
	else
	printOp(MI->getOperand(1));
	O << ")\n";
	} else if (Opcode == PPC32::LOADHiAddr) {
	printOp(MI->getOperand(0));
	O << ", ";
	if (MI->getOperand(1).getReg() == PPC32::R0)
	O << "0";
	else
	printOp(MI->getOperand(1));
	O << ", ha16(" ;
	printOp(MI->getOperand(2));
	O << "-\"L0000" << labelNumber << "$pb\")\n";
	} else if (ArgCount == 3 && ArgType[1] == PPC32II::Disimm16) {
	printOp(MI->getOperand(0));
	O << ", ";
	printOp(MI->getOperand(1));
	O << "(";
	if (MI->getOperand(2).hasAllocatedReg() &&
	MI->getOperand(2).getReg() == PPC32::R0)
	O << "0";
	else
	printOp(MI->getOperand(2));
	O << ")\n";
	} else {
	for (i = 0; i < ArgCount; ++i) {
	if (i == 1 && ArgCount == 3 && ArgType[2] == PPC32II::Simm16 &&
	MI->getOperand(1).hasAllocatedReg() &&
	MI->getOperand(1).getReg() == PPC32::R0) {
	O << "0";
	} 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() &&
	(I->hasLinkOnceLinkage() \|\| I->hasInternalLinkage() \|\|
	I->hasWeakLinkage() /* FIXME: Verify correct */)) {
	SwitchSection(O, CurSection, ".data");
	if (I->hasInternalLinkage())
	O << "\t.lcomm " << name << "," << TD.getTypeSize(C->getType())
	<< "," << (unsigned)TD.getTypeAlignment(C->getType());
	else
	O << "\t.comm " << name << "," << TD.getTypeSize(C->getType());
	O << "\t\t; ";
	WriteAsOperand(O, I, true, true, &M);
	O << "\n";
	} else {
	switch (I->getLinkage()) {
	case GlobalValue::LinkOnceLinkage:
	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 dynamically-linked functions
	for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
	i != e; ++i)
	{
	O << "\t.picsymbol_stub\n";
	O << "L" << *i << "$stub:\n";
	O << "\t.indirect_symbol " << *i << "\n";
	O << "\tmflr r0\n";
	O << "\tbl L0$" << *i << "\n";
	O << "L0$" << *i << ":\n";
	O << "\tmflr r11\n";
	O << "\taddis r11,r11,ha16(L" << i << "$lazy_ptr-L0$" << i << ")\n";
	O << "\tmtlr r0\n";
	O << "\tlwz r12,lo16(L" << i << "$lazy_ptr-L0$" << i << ")(r11)\n";
	O << "\tmtctr r12\n";
	O << "\taddi r11,r11,lo16(L" << i << "$lazy_ptr - L0$" << i << ")\n";
	O << "\tbctr\n";
	O << ".data\n";
	O << ".lazy_symbol_pointer\n";
	O << "L" << *i << "$lazy_ptr:\n";
	O << ".indirect_symbol " << *i << "\n";
	O << ".long dyld_stub_binding_helper\n";
	}

	O << "\n";

	// Output stubs for external global variables
	if (GVStubs.begin() != GVStubs.end())
	O << "\t.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