Factor out asmprinter out of ppc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54887 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 1119 deletions

diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
deleted file mode 100644
index 1c54590..0000000
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ /dev/null
@@ -1,1119 +0,0 @@
-//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --------=//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file 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 "PPC.h"
-#include "PPCPredicates.h"
-#include "PPCTargetMachine.h"
-#include "PPCSubtarget.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Module.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/DwarfWriter.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringExtras.h"
-#include <set>
-using namespace llvm;
-
-STATISTIC(EmittedInsts, "Number of machine instrs printed");
-
-namespace {
-  struct VISIBILITY_HIDDEN PPCAsmPrinter : public AsmPrinter {
-    std::set<std::string> FnStubs, GVStubs;
-    const PPCSubtarget &Subtarget;
-
-    PPCAsmPrinter(std::ostream &O, TargetMachine &TM, const TargetAsmInfo *T)
-      : AsmPrinter(O, TM, T), Subtarget(TM.getSubtarget<PPCSubtarget>()) {
-    }
-
-    virtual const char *getPassName() const {
-      return "PowerPC Assembly Printer";
-    }
-
-    PPCTargetMachine &getTM() {
-      return static_cast<PPCTargetMachine&>(TM);
-    }
-
-    unsigned enumRegToMachineReg(unsigned enumReg) {
-      switch (enumReg) {
-      default: assert(0 && "Unhandled register!"); break;
-      case PPC::CR0:  return  0;
-      case PPC::CR1:  return  1;
-      case PPC::CR2:  return  2;
-      case PPC::CR3:  return  3;
-      case PPC::CR4:  return  4;
-      case PPC::CR5:  return  5;
-      case PPC::CR6:  return  6;
-      case PPC::CR7:  return  7;
-      }
-      abort();
-    }
-
-    /// printInstruction - This method is automatically generated by tablegen
-    /// from the instruction set description.  This method returns true if the
-    /// machine instruction was sufficiently described to print it, otherwise it
-    /// returns false.
-    bool printInstruction(const MachineInstr *MI);
-
-    void printMachineInstruction(const MachineInstr *MI);
-    void printOp(const MachineOperand &MO);
-
-    /// stripRegisterPrefix - This method strips the character prefix from a
-    /// register name so that only the number is left.  Used by for linux asm.
-    const char *stripRegisterPrefix(const char *RegName) {
-      switch (RegName[0]) {
-      case 'r':
-      case 'f':
-      case 'v': return RegName + 1;
-      case 'c': if (RegName[1] == 'r') return RegName + 2;
-      }
-
-      return RegName;
-    }
-
-    /// printRegister - Print register according to target requirements.
-    ///
-    void printRegister(const MachineOperand &MO, bool R0AsZero) {
-      unsigned RegNo = MO.getReg();
-      assert(TargetRegisterInfo::isPhysicalRegister(RegNo) && "Not physreg??");
-
-      // If we should use 0 for R0.
-      if (R0AsZero && RegNo == PPC::R0) {
-        O << "0";
-        return;
-      }
-
-      const char *RegName = TM.getRegisterInfo()->get(RegNo).AsmName;
-      // Linux assembler (Others?) does not take register mnemonics.
-      // FIXME - What about special registers used in mfspr/mtspr?
-      if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
-      O << RegName;
-    }
-
-    void printOperand(const MachineInstr *MI, unsigned OpNo) {
-      const MachineOperand &MO = MI->getOperand(OpNo);
-      if (MO.isRegister()) {
-        printRegister(MO, false);
-      } else if (MO.isImmediate()) {
-        O << MO.getImm();
-      } else {
-        printOp(MO);
-      }
-    }
-
-    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
-                         unsigned AsmVariant, const char *ExtraCode);
-    bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
-                               unsigned AsmVariant, const char *ExtraCode);
-
-
-    void printS5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      char value = MI->getOperand(OpNo).getImm();
-      value = (value << (32-5)) >> (32-5);
-      O << (int)value;
-    }
-    void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      unsigned char value = MI->getOperand(OpNo).getImm();
-      assert(value <= 31 && "Invalid u5imm argument!");
-      O << (unsigned int)value;
-    }
-    void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      unsigned char value = MI->getOperand(OpNo).getImm();
-      assert(value <= 63 && "Invalid u6imm argument!");
-      O << (unsigned int)value;
-    }
-    void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      O << (short)MI->getOperand(OpNo).getImm();
-    }
-    void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      O << (unsigned short)MI->getOperand(OpNo).getImm();
-    }
-    void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo) {
-      if (MI->getOperand(OpNo).isImmediate()) {
-        O << (short)(MI->getOperand(OpNo).getImm()*4);
-      } else {
-        O << "lo16(";
-        printOp(MI->getOperand(OpNo));
-        if (TM.getRelocationModel() == Reloc::PIC_)
-          O << "-\"L" << getFunctionNumber() << "$pb\")";
-        else
-          O << ')';
-      }
-    }
-    void printBranchOperand(const MachineInstr *MI, unsigned OpNo) {
-      // Branches can take an immediate operand.  This is used by the branch
-      // selection pass to print $+8, an eight byte displacement from the PC.
-      if (MI->getOperand(OpNo).isImmediate()) {
-        O << "$+" << MI->getOperand(OpNo).getImm()*4;
-      } else {
-        printOp(MI->getOperand(OpNo));
-      }
-    }
-    void printCallOperand(const MachineInstr *MI, unsigned OpNo) {
-      const MachineOperand &MO = MI->getOperand(OpNo);
-      if (TM.getRelocationModel() != Reloc::Static) {
-        if (MO.getType() == MachineOperand::MO_GlobalAddress) {
-          GlobalValue *GV = MO.getGlobal();
-          if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
-                GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
-            // Dynamically-resolved functions need a stub for the function.
-            std::string Name = Mang->getValueName(GV);
-            FnStubs.insert(Name);
-            printSuffixedName(Name, "$stub");
-            if (GV->hasExternalWeakLinkage())
-              ExtWeakSymbols.insert(GV);
-            return;
-          }
-        }
-        if (MO.getType() == MachineOperand::MO_ExternalSymbol) {
-          std::string Name(TAI->getGlobalPrefix()); Name += MO.getSymbolName();
-          FnStubs.insert(Name);
-          printSuffixedName(Name, "$stub");
-          return;
-        }
-      }
-
-      printOp(MI->getOperand(OpNo));
-    }
-    void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo) {
-     O << (int)MI->getOperand(OpNo).getImm()*4;
-    }
-    void printPICLabel(const MachineInstr *MI, unsigned OpNo) {
-      O << "\"L" << getFunctionNumber() << "$pb\"\n";
-      O << "\"L" << getFunctionNumber() << "$pb\":";
-    }
-    void printSymbolHi(const MachineInstr *MI, unsigned OpNo) {
-      if (MI->getOperand(OpNo).isImmediate()) {
-        printS16ImmOperand(MI, OpNo);
-      } else {
-        if (Subtarget.isDarwin()) O << "ha16(";
-        printOp(MI->getOperand(OpNo));
-        if (TM.getRelocationModel() == Reloc::PIC_)
-          O << "-\"L" << getFunctionNumber() << "$pb\"";
-        if (Subtarget.isDarwin())
-          O << ')';
-        else
-          O << "@ha";
-      }
-    }
-    void printSymbolLo(const MachineInstr *MI, unsigned OpNo) {
-      if (MI->getOperand(OpNo).isImmediate()) {
-        printS16ImmOperand(MI, OpNo);
-      } else {
-        if (Subtarget.isDarwin()) O << "lo16(";
-        printOp(MI->getOperand(OpNo));
-        if (TM.getRelocationModel() == Reloc::PIC_)
-          O << "-\"L" << getFunctionNumber() << "$pb\"";
-        if (Subtarget.isDarwin())
-          O << ')';
-        else
-          O << "@l";
-      }
-    }
-    void printcrbitm(const MachineInstr *MI, unsigned OpNo) {
-      unsigned CCReg = MI->getOperand(OpNo).getReg();
-      unsigned RegNo = enumRegToMachineReg(CCReg);
-      O << (0x80 >> RegNo);
-    }
-    // The new addressing mode printers.
-    void printMemRegImm(const MachineInstr *MI, unsigned OpNo) {
-      printSymbolLo(MI, OpNo);
-      O << '(';
-      if (MI->getOperand(OpNo+1).isRegister() &&
-          MI->getOperand(OpNo+1).getReg() == PPC::R0)
-        O << "0";
-      else
-        printOperand(MI, OpNo+1);
-      O << ')';
-    }
-    void printMemRegImmShifted(const MachineInstr *MI, unsigned OpNo) {
-      if (MI->getOperand(OpNo).isImmediate())
-        printS16X4ImmOperand(MI, OpNo);
-      else
-        printSymbolLo(MI, OpNo);
-      O << '(';
-      if (MI->getOperand(OpNo+1).isRegister() &&
-          MI->getOperand(OpNo+1).getReg() == PPC::R0)
-        O << "0";
-      else
-        printOperand(MI, OpNo+1);
-      O << ')';
-    }
-
-    void printMemRegReg(const MachineInstr *MI, unsigned OpNo) {
-      // When used as the base register, r0 reads constant zero rather than
-      // the value contained in the register.  For this reason, the darwin
-      // assembler requires that we print r0 as 0 (no r) when used as the base.
-      const MachineOperand &MO = MI->getOperand(OpNo);
-      printRegister(MO, true);
-      O << ", ";
-      printOperand(MI, OpNo+1);
-    }
-
-    void printPredicateOperand(const MachineInstr *MI, unsigned OpNo,
-                               const char *Modifier);
-
-    virtual bool runOnMachineFunction(MachineFunction &F) = 0;
-    virtual bool doFinalization(Module &M) = 0;
-
-    virtual void EmitExternalGlobal(const GlobalVariable *GV);
-  };
-
-  /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
-  struct VISIBILITY_HIDDEN PPCLinuxAsmPrinter : public PPCAsmPrinter {
-
-    DwarfWriter DW;
-    MachineModuleInfo *MMI;
-
-    PPCLinuxAsmPrinter(std::ostream &O, PPCTargetMachine &TM,
-                    const TargetAsmInfo *T)
-      : PPCAsmPrinter(O, TM, T), DW(O, this, T), MMI(0) {
-    }
-
-    virtual const char *getPassName() const {
-      return "Linux PPC Assembly Printer";
-    }
-
-    bool runOnMachineFunction(MachineFunction &F);
-    bool doInitialization(Module &M);
-    bool doFinalization(Module &M);
-
-    void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesAll();
-      AU.addRequired<MachineModuleInfo>();
-      PPCAsmPrinter::getAnalysisUsage(AU);
-    }
-
-    /// getSectionForFunction - Return the section that we should emit the
-    /// specified function body into.
-    virtual std::string getSectionForFunction(const Function &F) const;
-    void printModuleLevelGV(const GlobalVariable* GVar);
-  };
-
-  /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
-  /// OS X
-  struct VISIBILITY_HIDDEN PPCDarwinAsmPrinter : public PPCAsmPrinter {
-
-    DwarfWriter DW;
-    MachineModuleInfo *MMI;
-
-    PPCDarwinAsmPrinter(std::ostream &O, PPCTargetMachine &TM,
-                        const TargetAsmInfo *T)
-      : PPCAsmPrinter(O, TM, T), DW(O, this, T), MMI(0) {
-    }
-
-    virtual const char *getPassName() const {
-      return "Darwin PPC Assembly Printer";
-    }
-
-    bool runOnMachineFunction(MachineFunction &F);
-    bool doInitialization(Module &M);
-    bool doFinalization(Module &M);
-
-    void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesAll();
-      AU.addRequired<MachineModuleInfo>();
-      PPCAsmPrinter::getAnalysisUsage(AU);
-    }
-
-    /// getSectionForFunction - Return the section that we should emit the
-    /// specified function body into.
-    virtual std::string getSectionForFunction(const Function &F) const;
-    void printModuleLevelGV(const GlobalVariable* GVar);
-  };
-} // end of anonymous namespace
-
-// Include the auto-generated portion of the assembly writer
-#include "PPCGenAsmWriter.inc"
-
-void PPCAsmPrinter::printOp(const MachineOperand &MO) {
-  switch (MO.getType()) {
-  case MachineOperand::MO_Immediate:
-    cerr << "printOp() does not handle immediate values\n";
-    abort();
-    return;
-
-  case MachineOperand::MO_MachineBasicBlock:
-    printBasicBlockLabel(MO.getMBB());
-    return;
-  case MachineOperand::MO_JumpTableIndex:
-    O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
-      << '_' << MO.getIndex();
-    // FIXME: PIC relocation model
-    return;
-  case MachineOperand::MO_ConstantPoolIndex:
-    O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
-      << '_' << MO.getIndex();
-    return;
-  case MachineOperand::MO_ExternalSymbol:
-    // Computing the address of an external symbol, not calling it.
-    if (TM.getRelocationModel() != Reloc::Static) {
-      std::string Name(TAI->getGlobalPrefix()); Name += MO.getSymbolName();
-      GVStubs.insert(Name);
-      printSuffixedName(Name, "$non_lazy_ptr");
-      return;
-    }
-    O << TAI->getGlobalPrefix() << MO.getSymbolName();
-    return;
-  case MachineOperand::MO_GlobalAddress: {
-    // Computing the address of a global symbol, not calling it.
-    GlobalValue *GV = MO.getGlobal();
-    std::string Name = Mang->getValueName(GV);
-
-    // External or weakly linked global variables need non-lazily-resolved stubs
-    if (TM.getRelocationModel() != Reloc::Static) {
-      if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
-            GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
-        GVStubs.insert(Name);
-        printSuffixedName(Name, "$non_lazy_ptr");
-        if (GV->hasExternalWeakLinkage())
-          ExtWeakSymbols.insert(GV);
-        return;
-      }
-    }
-    O << Name;
-
-    if (MO.getOffset() > 0)
-      O << "+" << MO.getOffset();
-    else if (MO.getOffset() < 0)
-      O << MO.getOffset();
-
-    if (GV->hasExternalWeakLinkage())
-      ExtWeakSymbols.insert(GV);
-    return;
-  }
-
-  default:
-    O << "<unknown operand type: " << MO.getType() << ">";
-    return;
-  }
-}
-
-/// EmitExternalGlobal - In this case we need to use the indirect symbol.
-///
-void PPCAsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
-  std::string Name = getGlobalLinkName(GV);
-  if (TM.getRelocationModel() != Reloc::Static) {
-    GVStubs.insert(Name);
-    printSuffixedName(Name, "$non_lazy_ptr");
-    return;
-  }
-  O << Name;
-}
-
-/// PrintAsmOperand - Print out an operand for an inline asm expression.
-///
-bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
-                                    unsigned AsmVariant,
-                                    const char *ExtraCode) {
-  // Does this asm operand have a single letter operand modifier?
-  if (ExtraCode && ExtraCode[0]) {
-    if (ExtraCode[1] != 0) return true; // Unknown modifier.
-
-    switch (ExtraCode[0]) {
-    default: return true;  // Unknown modifier.
-    case 'c': // Don't print "$" before a global var name or constant.
-      // PPC never has a prefix.
-      printOperand(MI, OpNo);
-      return false;
-    case 'L': // Write second word of DImode reference.
-      // Verify that this operand has two consecutive registers.
-      if (!MI->getOperand(OpNo).isRegister() ||
-          OpNo+1 == MI->getNumOperands() ||
-          !MI->getOperand(OpNo+1).isRegister())
-        return true;
-      ++OpNo;   // Return the high-part.
-      break;
-    case 'I':
-      // Write 'i' if an integer constant, otherwise nothing.  Used to print
-      // addi vs add, etc.
-      if (MI->getOperand(OpNo).isImmediate())
-        O << "i";
-      return false;
-    }
-  }
-
-  printOperand(MI, OpNo);
-  return false;
-}
-
-bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
-                                          unsigned AsmVariant,
-                                          const char *ExtraCode) {
-  if (ExtraCode && ExtraCode[0])
-    return true; // Unknown modifier.
-  if (MI->getOperand(OpNo).isRegister())
-    printMemRegReg(MI, OpNo);
-  else
-    printMemRegImm(MI, OpNo);
-  return false;
-}
-
-void PPCAsmPrinter::printPredicateOperand(const MachineInstr *MI, unsigned OpNo,
-                                          const char *Modifier) {
-  assert(Modifier && "Must specify 'cc' or 'reg' as predicate op modifier!");
-  unsigned Code = MI->getOperand(OpNo).getImm();
-  if (!strcmp(Modifier, "cc")) {
-    switch ((PPC::Predicate)Code) {
-    case PPC::PRED_ALWAYS: return; // Don't print anything for always.
-    case PPC::PRED_LT: O << "lt"; return;
-    case PPC::PRED_LE: O << "le"; return;
-    case PPC::PRED_EQ: O << "eq"; return;
-    case PPC::PRED_GE: O << "ge"; return;
-    case PPC::PRED_GT: O << "gt"; return;
-    case PPC::PRED_NE: O << "ne"; return;
-    case PPC::PRED_UN: O << "un"; return;
-    case PPC::PRED_NU: O << "nu"; return;
-    }
-
-  } else {
-    assert(!strcmp(Modifier, "reg") &&
-           "Need to specify 'cc' or 'reg' as predicate op modifier!");
-    // Don't print the register for 'always'.
-    if (Code == PPC::PRED_ALWAYS) return;
-    printOperand(MI, OpNo+1);
-  }
-}
-
-
-/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
-/// the current output stream.
-///
-void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
-  ++EmittedInsts;
-
-  // Check for slwi/srwi mnemonics.
-  if (MI->getOpcode() == PPC::RLWINM) {
-    bool FoundMnemonic = false;
-    unsigned char SH = MI->getOperand(2).getImm();
-    unsigned char MB = MI->getOperand(3).getImm();
-    unsigned char ME = MI->getOperand(4).getImm();
-    if (SH <= 31 && MB == 0 && ME == (31-SH)) {
-      O << "\tslwi "; FoundMnemonic = true;
-    }
-    if (SH <= 31 && MB == (32-SH) && ME == 31) {
-      O << "\tsrwi "; FoundMnemonic = true;
-      SH = 32-SH;
-    }
-    if (FoundMnemonic) {
-      printOperand(MI, 0);
-      O << ", ";
-      printOperand(MI, 1);
-      O << ", " << (unsigned int)SH << '\n';
-      return;
-    }
-  } else if (MI->getOpcode() == PPC::OR || MI->getOpcode() == PPC::OR8) {
-    if (MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
-      O << "\tmr ";
-      printOperand(MI, 0);
-      O << ", ";
-      printOperand(MI, 1);
-      O << '\n';
-      return;
-    }
-  } else if (MI->getOpcode() == PPC::RLDICR) {
-    unsigned char SH = MI->getOperand(2).getImm();
-    unsigned char ME = MI->getOperand(3).getImm();
-    // rldicr RA, RS, SH, 63-SH == sldi RA, RS, SH
-    if (63-SH == ME) {
-      O << "\tsldi ";
-      printOperand(MI, 0);
-      O << ", ";
-      printOperand(MI, 1);
-      O << ", " << (unsigned int)SH << '\n';
-      return;
-    }
-  }
-
-  if (printInstruction(MI))
-    return; // Printer was automatically generated
-
-  assert(0 && "Unhandled instruction in asm writer!");
-  abort();
-  return;
-}
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool PPCLinuxAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
-
-  SetupMachineFunction(MF);
-  O << "\n\n";
-
-  // Print out constants referenced by the function
-  EmitConstantPool(MF.getConstantPool());
-
-  // Print out labels for the function.
-  const Function *F = MF.getFunction();
-  SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
-
-  switch (F->getLinkage()) {
-  default: assert(0 && "Unknown linkage type!");
-  case Function::InternalLinkage:  // Symbols default to internal.
-    break;
-  case Function::ExternalLinkage:
-    O << "\t.global\t" << CurrentFnName << '\n'
-      << "\t.type\t" << CurrentFnName << ", @function\n";
-    break;
-  case Function::WeakLinkage:
-  case Function::LinkOnceLinkage:
-    O << "\t.global\t" << CurrentFnName << '\n';
-    O << "\t.weak\t" << CurrentFnName << '\n';
-    break;
-  }
-
-  printVisibility(CurrentFnName, F->getVisibility());
-
-  EmitAlignment(2, F);
-  O << CurrentFnName << ":\n";
-
-  // Emit pre-function debug information.
-  DW.BeginFunction(&MF);
-
-  // 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.
-    if (I != MF.begin()) {
-      printBasicBlockLabel(I, true, true);
-      O << '\n';
-    }
-    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
-         II != E; ++II) {
-      // Print the assembly for the instruction.
-      printMachineInstruction(II);
-    }
-  }
-
-  O << "\t.size\t" << CurrentFnName << ",.-" << CurrentFnName << '\n';
-
-  // Print out jump tables referenced by the function.
-  EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
-
-  // Emit post-function debug information.
-  DW.EndFunction();
-
-  // We didn't modify anything.
-  return false;
-}
-
-bool PPCLinuxAsmPrinter::doInitialization(Module &M) {
-  bool Result = AsmPrinter::doInitialization(M);
-
-  // Emit initial debug information.
-  DW.BeginModule(&M);
-
-  // AsmPrinter::doInitialization should have done this analysis.
-  MMI = getAnalysisToUpdate<MachineModuleInfo>();
-  assert(MMI);
-  DW.SetModuleInfo(MMI);
-
-  // GNU as handles section names wrapped in quotes
-  Mang->setUseQuotes(true);
-
-  SwitchToTextSection(TAI->getTextSection());
-
-  return Result;
-}
-
-/// PrintUnmangledNameSafely - Print out the printable characters in the name.
-/// Don't print things like \n or \0.
-static void PrintUnmangledNameSafely(const Value *V, std::ostream &OS) {
-  for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
-       Name != E; ++Name)
-    if (isprint(*Name))
-      OS << *Name;
-}
-
-void PPCLinuxAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
-  const TargetData *TD = TM.getTargetData();
-
-  if (!GVar->hasInitializer())
-    return;   // External global require no code
-
-  // Check to see if this is a special global used by LLVM, if so, emit it.
-  if (EmitSpecialLLVMGlobal(GVar))
-    return;
-
-  std::string name = Mang->getValueName(GVar);
-  std::string SectionName = TAI->SectionForGlobal(GVar);
-
-  printVisibility(name, GVar->getVisibility());
-
-  Constant *C = GVar->getInitializer();
-  const Type *Type = C->getType();
-  unsigned Size = TD->getABITypeSize(Type);
-  unsigned Align = TD->getPreferredAlignmentLog(GVar);
-
-  SwitchToDataSection(SectionName.c_str());
-
-  if (C->isNullValue() && /* FIXME: Verify correct */
-      !GVar->hasSection() &&
-      (GVar->hasInternalLinkage() || GVar->hasExternalLinkage() ||
-       GVar->isWeakForLinker())) {
-      if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
-
-      if (GVar->hasExternalLinkage()) {
-        O << "\t.global " << name << '\n';
-        O << "\t.type " << name << ", @object\n";
-        O << name << ":\n";
-        O << "\t.zero " << Size << '\n';
-      } else if (GVar->hasInternalLinkage()) {
-        O << TAI->getLCOMMDirective() << name << ',' << Size;
-      } else {
-        O << ".comm " << name << ',' << Size;
-      }
-      O << "\t\t" << TAI->getCommentString() << " '";
-      PrintUnmangledNameSafely(GVar, O);
-      O << "'\n";
-      return;
-  }
-
-  switch (GVar->getLinkage()) {
-   case GlobalValue::LinkOnceLinkage:
-   case GlobalValue::WeakLinkage:
-   case GlobalValue::CommonLinkage:
-    O << "\t.global " << name << '\n'
-      << "\t.type " << name << ", @object\n"
-      << "\t.weak " << name << '\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.global " << name << '\n'
-      << "\t.type " << name << ", @object\n";
-    // FALL THROUGH
-   case GlobalValue::InternalLinkage:
-    break;
-   default:
-    cerr << "Unknown linkage type!";
-    abort();
-  }
-
-  EmitAlignment(Align, GVar);
-  O << name << ":\t\t\t\t" << TAI->getCommentString() << " '";
-  PrintUnmangledNameSafely(GVar, O);
-  O << "'\n";
-
-  // If the initializer is a extern weak symbol, remember to emit the weak
-  // reference!
-  if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
-    if (GV->hasExternalWeakLinkage())
-      ExtWeakSymbols.insert(GV);
-
-  EmitGlobalConstant(C);
-  O << '\n';
-}
-
-bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
-  // Print out module-level global variables here.
-  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
-       I != E; ++I)
-    printModuleLevelGV(I);
-
-  // TODO
-
-  // Emit initial debug information.
-  DW.EndModule();
-
-  return AsmPrinter::doFinalization(M);
-}
-
-std::string PPCLinuxAsmPrinter::getSectionForFunction(const Function &F) const {
-  return TAI->SectionForGlobal(&F);
-}
-
-std::string PPCDarwinAsmPrinter::getSectionForFunction(const Function &F) const {
-  return TAI->SectionForGlobal(&F);
-}
-
-/// runOnMachineFunction - This uses the printMachineInstruction()
-/// method to print assembly for each instruction.
-///
-bool PPCDarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
-  SetupMachineFunction(MF);
-  O << "\n\n";
-
-  // Print out constants referenced by the function
-  EmitConstantPool(MF.getConstantPool());
-
-  // Print out labels for the function.
-  const Function *F = MF.getFunction();
-  SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
-
-  switch (F->getLinkage()) {
-  default: assert(0 && "Unknown linkage type!");
-  case Function::InternalLinkage:  // Symbols default to internal.
-    break;
-  case Function::ExternalLinkage:
-    O << "\t.globl\t" << CurrentFnName << '\n';
-    break;
-  case Function::WeakLinkage:
-  case Function::LinkOnceLinkage:
-    O << "\t.globl\t" << CurrentFnName << '\n';
-    O << "\t.weak_definition\t" << CurrentFnName << '\n';
-    break;
-  }
-
-  printVisibility(CurrentFnName, F->getVisibility());
-
-  EmitAlignment(OptimizeForSize ? 2 : 4, F);
-  O << CurrentFnName << ":\n";
-
-  // Emit pre-function debug information.
-  DW.BeginFunction(&MF);
-
-  // If the function is empty, then we need to emit *something*. Otherwise, the
-  // function's label might be associated with something that it wasn't meant to
-  // be associated with. We emit a noop in this situation.
-  MachineFunction::iterator I = MF.begin();
-
-  if (++I == MF.end() && MF.front().empty())
-    O << "\tnop\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.
-    if (I != MF.begin()) {
-      printBasicBlockLabel(I, true, true);
-      O << '\n';
-    }
-    for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
-         II != IE; ++II) {
-      // Print the assembly for the instruction.
-      printMachineInstruction(II);
-    }
-  }
-
-  // Print out jump tables referenced by the function.
-  EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
-
-  // Emit post-function debug information.
-  DW.EndFunction();
-
-  // We didn't modify anything.
-  return false;
-}
-
-
-bool PPCDarwinAsmPrinter::doInitialization(Module &M) {
-  static const char *const CPUDirectives[] = {
-    "",
-    "ppc",
-    "ppc601",
-    "ppc602",
-    "ppc603",
-    "ppc7400",
-    "ppc750",
-    "ppc970",
-    "ppc64"
-  };
-
-  unsigned Directive = Subtarget.getDarwinDirective();
-  if (Subtarget.isGigaProcessor() && Directive < PPC::DIR_970)
-    Directive = PPC::DIR_970;
-  if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
-    Directive = PPC::DIR_7400;
-  if (Subtarget.isPPC64() && Directive < PPC::DIR_970)
-    Directive = PPC::DIR_64;
-  assert(Directive <= PPC::DIR_64 && "Directive out of range.");
-  O << "\t.machine " << CPUDirectives[Directive] << '\n';
-
-  bool Result = AsmPrinter::doInitialization(M);
-
-  // Emit initial debug information.
-  DW.BeginModule(&M);
-
-  // We need this for Personality functions.
-  // AsmPrinter::doInitialization should have done this analysis.
-  MMI = getAnalysisToUpdate<MachineModuleInfo>();
-  assert(MMI);
-  DW.SetModuleInfo(MMI);
-
-  // Darwin wants symbols to be quoted if they have complex names.
-  Mang->setUseQuotes(true);
-
-  // Prime text sections so they are adjacent.  This reduces the likelihood a
-  // large data or debug section causes a branch to exceed 16M limit.
-  SwitchToTextSection("\t.section __TEXT,__textcoal_nt,coalesced,"
-                      "pure_instructions");
-  if (TM.getRelocationModel() == Reloc::PIC_) {
-    SwitchToTextSection("\t.section __TEXT,__picsymbolstub1,symbol_stubs,"
-                          "pure_instructions,32");
-  } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
-    SwitchToTextSection("\t.section __TEXT,__symbol_stub1,symbol_stubs,"
-                        "pure_instructions,16");
-  }
-  SwitchToTextSection(TAI->getTextSection());
-
-  return Result;
-}
-
-void PPCDarwinAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
-  const TargetData *TD = TM.getTargetData();
-
-  if (!GVar->hasInitializer())
-    return;   // External global require no code
-
-  // Check to see if this is a special global used by LLVM, if so, emit it.
-  if (EmitSpecialLLVMGlobal(GVar)) {
-    if (TM.getRelocationModel() == Reloc::Static) {
-      if (GVar->getName() == "llvm.global_ctors")
-        O << ".reference .constructors_used\n";
-      else if (GVar->getName() == "llvm.global_dtors")
-        O << ".reference .destructors_used\n";
-    }
-    return;
-  }
-
-  std::string name = Mang->getValueName(GVar);
-  std::string SectionName = TAI->SectionForGlobal(GVar);
-
-  printVisibility(name, GVar->getVisibility());
-
-  Constant *C = GVar->getInitializer();
-  const Type *Type = C->getType();
-  unsigned Size = TD->getABITypeSize(Type);
-  unsigned Align = TD->getPreferredAlignmentLog(GVar);
-
-  SwitchToDataSection(SectionName.c_str());
-
-  if (C->isNullValue() && /* FIXME: Verify correct */
-      !GVar->hasSection() &&
-      (GVar->hasInternalLinkage() || GVar->hasExternalLinkage() ||
-       GVar->isWeakForLinker())) {
-    if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
-
-    if (GVar->hasExternalLinkage()) {
-      O << "\t.globl " << name << '\n';
-      O << "\t.zerofill __DATA, __common, " << name << ", "
-        << Size << ", " << Align;
-    } else if (GVar->hasInternalLinkage()) {
-      O << TAI->getLCOMMDirective() << name << ',' << Size << ',' << Align;
-    } else if (!GVar->hasCommonLinkage()) {
-      O << "\t.globl " << name << '\n'
-        << TAI->getWeakDefDirective() << name << '\n';
-      EmitAlignment(Align, GVar);
-      O << name << ":\t\t\t\t" << TAI->getCommentString() << " ";
-      PrintUnmangledNameSafely(GVar, O);
-      O << '\n';
-      EmitGlobalConstant(C);
-      return;
-    } else {
-      O << ".comm " << name << ',' << Size;
-      // Darwin 9 and above support aligned common data.
-      if (Subtarget.isDarwin9())
-        O << ',' << Align;
-    }
-    O << "\t\t" << TAI->getCommentString() << " '";
-    PrintUnmangledNameSafely(GVar, O);
-    O << "'\n";
-    return;
-  }
-
-  switch (GVar->getLinkage()) {
-   case GlobalValue::LinkOnceLinkage:
-   case GlobalValue::WeakLinkage:
-   case GlobalValue::CommonLinkage:
-    O << "\t.globl " << name << '\n'
-      << "\t.weak_definition " << name << '\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:
-    break;
-   default:
-    cerr << "Unknown linkage type!";
-    abort();
-  }
-
-  EmitAlignment(Align, GVar);
-  O << name << ":\t\t\t\t" << TAI->getCommentString() << " '";
-  PrintUnmangledNameSafely(GVar, O);
-  O << "'\n";
-
-  // If the initializer is a extern weak symbol, remember to emit the weak
-  // reference!
-  if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
-    if (GV->hasExternalWeakLinkage())
-      ExtWeakSymbols.insert(GV);
-
-  EmitGlobalConstant(C);
-  O << '\n';
-}
-
-bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
-  const TargetData *TD = TM.getTargetData();
-
-  // Print out module-level global variables here.
-  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
-       I != E; ++I)
-    printModuleLevelGV(I);
-
-  bool isPPC64 = TD->getPointerSizeInBits() == 64;
-
-  // Output stubs for dynamically-linked functions
-  if (TM.getRelocationModel() == Reloc::PIC_) {
-    for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
-         i != e; ++i) {
-      SwitchToTextSection("\t.section __TEXT,__picsymbolstub1,symbol_stubs,"
-                          "pure_instructions,32");
-      EmitAlignment(4);
-      std::string p = *i;
-      std::string L0p = (p[0]=='\"') ? "\"L0$" + p.substr(1) : "L0$" + p ;
-      printSuffixedName(p, "$stub");
-      O << ":\n";
-      O << "\t.indirect_symbol " << *i << '\n';
-      O << "\tmflr r0\n";
-      O << "\tbcl 20,31," << L0p << '\n';
-      O << L0p << ":\n";
-      O << "\tmflr r11\n";
-      O << "\taddis r11,r11,ha16(";
-      printSuffixedName(p, "$lazy_ptr");
-      O << "-" << L0p << ")\n";
-      O << "\tmtlr r0\n";
-      if (isPPC64)
-        O << "\tldu r12,lo16(";
-      else
-        O << "\tlwzu r12,lo16(";
-      printSuffixedName(p, "$lazy_ptr");
-      O << "-" << L0p << ")(r11)\n";
-      O << "\tmtctr r12\n";
-      O << "\tbctr\n";
-      SwitchToDataSection(".lazy_symbol_pointer");
-      printSuffixedName(p, "$lazy_ptr");
-      O << ":\n";
-      O << "\t.indirect_symbol " << *i << '\n';
-      if (isPPC64)
-        O << "\t.quad dyld_stub_binding_helper\n";
-      else
-        O << "\t.long dyld_stub_binding_helper\n";
-    }
-  } else {
-    for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
-         i != e; ++i) {
-      SwitchToTextSection("\t.section __TEXT,__symbol_stub1,symbol_stubs,"
-                          "pure_instructions,16");
-      EmitAlignment(4);
-      std::string p = *i;
-      printSuffixedName(p, "$stub");
-      O << ":\n";
-      O << "\t.indirect_symbol " << *i << '\n';
-      O << "\tlis r11,ha16(";
-      printSuffixedName(p, "$lazy_ptr");
-      O << ")\n";
-      if (isPPC64)
-        O << "\tldu r12,lo16(";
-      else
-        O << "\tlwzu r12,lo16(";
-      printSuffixedName(p, "$lazy_ptr");
-      O << ")(r11)\n";
-      O << "\tmtctr r12\n";
-      O << "\tbctr\n";
-      SwitchToDataSection(".lazy_symbol_pointer");
-      printSuffixedName(p, "$lazy_ptr");
-      O << ":\n";
-      O << "\t.indirect_symbol " << *i << '\n';
-      if (isPPC64)
-        O << "\t.quad dyld_stub_binding_helper\n";
-      else
-        O << "\t.long dyld_stub_binding_helper\n";
-    }
-  }
-
-  O << '\n';
-
-  if (TAI->doesSupportExceptionHandling() && MMI) {
-    // Add the (possibly multiple) personalities to the set of global values.
-    // Only referenced functions get into the Personalities list.
-    const std::vector<Function *>& Personalities = MMI->getPersonalities();
-
-    for (std::vector<Function *>::const_iterator I = Personalities.begin(),
-           E = Personalities.end(); I != E; ++I)
-      if (*I) GVStubs.insert("_" + (*I)->getName());
-  }
-
-  // Output stubs for external and common global variables.
-  if (!GVStubs.empty()) {
-    SwitchToDataSection(".non_lazy_symbol_pointer");
-    for (std::set<std::string>::iterator I = GVStubs.begin(),
-         E = GVStubs.end(); I != E; ++I) {
-      std::string p = *I;
-      printSuffixedName(p, "$non_lazy_ptr");
-      O << ":\n";
-      O << "\t.indirect_symbol " << *I << '\n';
-      if (isPPC64)
-        O << "\t.quad\t0\n";
-      else
-        O << "\t.long\t0\n";
-    }
-  }
-
-  // Emit initial debug information.
-  DW.EndModule();
-
-  // Funny Darwin hack: This flag tells the linker that no global symbols
-  // contain code that falls through to other global symbols (e.g. the obvious
-  // implementation of multiple entry points).  If this doesn't occur, the
-  // linker can safely perform dead code stripping.  Since LLVM never generates
-  // code that does this, it is always safe to set.
-  O << "\t.subsections_via_symbols\n";
-
-  return AsmPrinter::doFinalization(M);
-}
-
-
-
-/// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
-/// for a MachineFunction to the given output stream, in a format that the
-/// Darwin assembler can deal with.
-///
-FunctionPass *llvm::createPPCAsmPrinterPass(std::ostream &o,
-                                            PPCTargetMachine &tm) {
-  const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
-
-  if (Subtarget->isDarwin()) {
-    return new PPCDarwinAsmPrinter(o, tm, tm.getTargetAsmInfo());
-  } else {
-    return new PPCLinuxAsmPrinter(o, tm, tm.getTargetAsmInfo());
-  }
-}