InstrInfoEmitter::run

// run - Emit the main instruction description records for the target...
void InstrInfoEmitter::run(raw_ostream &OS) {
  emitEnums(OS);

  GatherItinClasses();

  EmitSourceFileHeader("Target Instruction Descriptors", OS);

  CodeGenTarget &Target = CDP.getTargetInfo();
  const std::string &TargetName = Target.getName();
  Record *InstrInfo = Target.getInstructionSet();
  std::string Namespace = Target.getInstNamespace();

  OS << "\n#ifdef GET_INSTRINFO_MC_DESC\n";
  OS << "#undef GET_INSTRINFO_MC_DESC\n";

  OS << "namespace llvm {\n";
  OS << "namespace " << Namespace << " {\n\n";

  // Keep track of all of the def lists we have emitted already.
  std::map<std::vector<Record*>, unsigned> EmittedLists;
  unsigned ListNumber = 0;

  // Emit all of the instruction's implicit uses and defs.
  for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
         E = Target.inst_end(); II != E; ++II) {
    Record *Inst = (*II)->TheDef;
    std::vector<Record*> Uses = Inst->getValueAsListOfDefs("Uses");
    if (!Uses.empty()) {
      unsigned &IL = EmittedLists[Uses];
      if (!IL) PrintDefList(Uses, IL = ++ListNumber, OS);
    }
    std::vector<Record*> Defs = Inst->getValueAsListOfDefs("Defs");
    if (!Defs.empty()) {
      unsigned &IL = EmittedLists[Defs];
      if (!IL) PrintDefList(Defs, IL = ++ListNumber, OS);
    }
  }

  OperandInfoMapTy OperandInfoIDs;

  // Emit all of the operand info records.
  EmitOperandInfo(OS, OperandInfoIDs);

  // Emit all of the MCInstrDesc records in their ENUM ordering.
  //
  OS << "\nMCInstrDesc " << "Insts[] = {\n";
  const std::vector<const CodeGenInstruction*> &NumberedInstructions =
    Target.getInstructionsByEnumValue();

  for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i)
    emitRecord(*NumberedInstructions[i], i, InstrInfo, EmittedLists,
               OperandInfoIDs, OS);
  OS << "};\n\n";
  OS << "} // End " << Namespace << " namespace \n";
  OS << "} // End llvm namespace \n\n";

  // MCInstrInfo initialization routine.
  OS << "namespace llvm {\n";
  OS << "static inline void Init" << TargetName
     << "MCInstrInfo(MCInstrInfo *II) {\n";
  OS << "  II->InitMCInstrInfo(" << Namespace << "::Insts, "
     << NumberedInstructions.size() << ");\n}\n\n";
  OS << "} // End llvm namespace \n";

  OS << "#endif // GET_INSTRINFO_MC_DESC\n\n";

  // Create a TargetInstrInfo subclass to hide the MC layer initialization.
  OS << "\n#ifdef GET_INSTRINFO_HEADER\n";
  OS << "#undef GET_INSTRINFO_HEADER\n";

  std::string ClassName = TargetName + "GenInstrInfo";
  OS << "namespace llvm {\n";
  OS << "struct " << ClassName << " : public TargetInstrInfoImpl {\n"
     << "  explicit " << ClassName << "(int SO = -1, int DO = -1);\n"
     << "};\n";
  OS << "} // End llvm namespace \n";

  OS << "#endif // GET_INSTRINFO_HEADER\n\n";

  OS << "\n#ifdef GET_INSTRINFO_CTOR\n";
  OS << "#undef GET_INSTRINFO_CTOR\n";

  OS << "namespace llvm {\n";
  OS << "namespace " << Namespace << " {\n";
  OS << "extern MCInstrDesc " << "Insts[];\n";
  OS << "} // End " << Namespace << " namespace \n";
  OS << ClassName << "::" << ClassName << "(int SO, int DO)\n"
     << "  : TargetInstrInfoImpl(SO, DO) {\n"
     << "  InitMCInstrInfo(" << TargetName << "::Insts, "
     << NumberedInstructions.size() << ");\n}\n";
  OS << "} // End llvm namespace \n";

  OS << "#endif // GET_INSTRINFO_CTOR\n\n";
}