AsmPrinter.cpp

          unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
          OpNo += (OpFlags >> 3) + 1;
        }

        if (OpNo >= MI->getNumOperands()) {
          Error = true;
        } else {
          unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
          ++OpNo;  // Skip over the ID number.

          AsmPrinter *AP = const_cast<AsmPrinter*>(this);
          if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
            Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
                                              Modifier[0] ? Modifier : 0);
          } else {
            Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
                                        Modifier[0] ? Modifier : 0);
          }
        }
        if (Error) {
          cerr << "Invalid operand found in inline asm: '"
               << AsmStr << "'\n";
          MI->dump();
          exit(1);
        }
      }
      break;
    }
    }
  }
  O << "\n\t" << TAI->getInlineAsmEnd() << "\n";
}

/// printLabel - This method prints a local label used by debug and
/// exception handling tables.
void AsmPrinter::printLabel(const MachineInstr *MI) const {
  O << "\n"
    << TAI->getPrivateGlobalPrefix()
    << "label_"
    << MI->getOperand(0).getImmedValue()
    << ":\n";
}

/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
/// instruction, using the specified assembler variant.  Targets should
/// overried this to format as appropriate.
bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                                 unsigned AsmVariant, const char *ExtraCode) {
  // Target doesn't support this yet!
  return true;
}

bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                                       unsigned AsmVariant,
                                       const char *ExtraCode) {
  // Target doesn't support this yet!
  return true;
}

/// printBasicBlockLabel - This method prints the label for the specified
/// MachineBasicBlock
void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
                                      bool printColon,
                                      bool printComment) const {
  O << TAI->getPrivateGlobalPrefix() << "BB" << FunctionNumber << "_"
    << MBB->getNumber();
  if (printColon)
    O << ':';
  if (printComment && MBB->getBasicBlock())
    O << '\t' << TAI->getCommentString() << MBB->getBasicBlock()->getName();
}

/// printSetLabel - This method prints a set label for the specified
/// MachineBasicBlock
void AsmPrinter::printSetLabel(unsigned uid, 
                               const MachineBasicBlock *MBB) const {
  if (!TAI->getSetDirective())
    return;
  
  O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
    << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
  printBasicBlockLabel(MBB, false, false);
  O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() 
    << '_' << uid << '\n';
}

void AsmPrinter::printSetLabel(unsigned uid, unsigned uid2,
                               const MachineBasicBlock *MBB) const {
  if (!TAI->getSetDirective())
    return;
  
  O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
    << getFunctionNumber() << '_' << uid << '_' << uid2
    << "_set_" << MBB->getNumber() << ',';
  printBasicBlockLabel(MBB, false, false);
  O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() 
    << '_' << uid << '_' << uid2 << '\n';
}

/// printDataDirective - This method prints the asm directive for the
/// specified type.
void AsmPrinter::printDataDirective(const Type *type) {
  const TargetData *TD = TM.getTargetData();
  switch (type->getTypeID()) {
  case Type::IntegerTyID: {
    unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
    if (BitWidth <= 8)
      O << TAI->getData8bitsDirective();
    else if (BitWidth <= 16)
      O << TAI->getData16bitsDirective();
    else if (BitWidth <= 32)
      O << TAI->getData32bitsDirective();
    else if (BitWidth <= 64) {
      assert(TAI->getData64bitsDirective() &&
             "Target cannot handle 64-bit constant exprs!");
      O << TAI->getData64bitsDirective();
    }
    break;
  }
  case Type::PointerTyID:
    if (TD->getPointerSize() == 8) {
      assert(TAI->getData64bitsDirective() &&
             "Target cannot handle 64-bit pointer exprs!");
      O << TAI->getData64bitsDirective();
    } else {
      O << TAI->getData32bitsDirective();
    }
    break;
  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;
  }
}