third_party/LLVM/utils/TableGen/InstrInfoEmitter.cpp - SwiftShader - Git at Google

 //===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This tablegen backend is responsible for emitting a description of the target
 // instruction set for the code generator.
 //
 //===----------------------------------------------------------------------===//

 #include "InstrInfoEmitter.h"
 #include "CodeGenTarget.h"
 #include "llvm/TableGen/Record.h"
 #include "llvm/ADT/StringExtras.h"
 #include <algorithm>
 using namespace llvm;

 static void PrintDefList(const std::vector<Record*> &Uses,
                          unsigned Num, raw_ostream &OS) {
   OS << "static const unsigned ImplicitList" << Num << "[] = { ";
   for (unsigned i = 0, e = Uses.size(); i != e; ++i)
     OS << getQualifiedName(Uses[i]) << ", ";
   OS << "0 };\n";
 }

 //===----------------------------------------------------------------------===//
 // Instruction Itinerary Information.
 //===----------------------------------------------------------------------===//

 void InstrInfoEmitter::GatherItinClasses() {
   std::vector<Record*> DefList =
   Records.getAllDerivedDefinitions("InstrItinClass");
   std::sort(DefList.begin(), DefList.end(), LessRecord());

   for (unsigned i = 0, N = DefList.size(); i < N; i++)
     ItinClassMap[DefList[i]->getName()] = i;
 }

 unsigned InstrInfoEmitter::getItinClassNumber(const Record *InstRec) {
   return ItinClassMap[InstRec->getValueAsDef("Itinerary")->getName()];
 }

 //===----------------------------------------------------------------------===//
 // Operand Info Emission.
 //===----------------------------------------------------------------------===//

 std::vector<std::string>
 InstrInfoEmitter::GetOperandInfo(const CodeGenInstruction &Inst) {
   std::vector<std::string> Result;

   for (unsigned i = 0, e = Inst.Operands.size(); i != e; ++i) {
     // Handle aggregate operands and normal operands the same way by expanding
     // either case into a list of operands for this op.
     std::vector<CGIOperandList::OperandInfo> OperandList;

     // This might be a multiple operand thing.  Targets like X86 have
     // registers in their multi-operand operands.  It may also be an anonymous
     // operand, which has a single operand, but no declared class for the
     // operand.
     DagInit *MIOI = Inst.Operands[i].MIOperandInfo;

     if (!MIOI || MIOI->getNumArgs() == 0) {
       // Single, anonymous, operand.
       OperandList.push_back(Inst.Operands[i]);
     } else {
       for (unsigned j = 0, e = Inst.Operands[i].MINumOperands; j != e; ++j) {
         OperandList.push_back(Inst.Operands[i]);

         Record *OpR = dynamic_cast<DefInit*>(MIOI->getArg(j))->getDef();
         OperandList.back().Rec = OpR;
       }
     }

     for (unsigned j = 0, e = OperandList.size(); j != e; ++j) {
       Record *OpR = OperandList[j].Rec;
       std::string Res;

       if (OpR->isSubClassOf("RegisterOperand"))
         OpR = OpR->getValueAsDef("RegClass");
       if (OpR->isSubClassOf("RegisterClass"))
         Res += getQualifiedName(OpR) + "RegClassID, ";
       else if (OpR->isSubClassOf("PointerLikeRegClass"))
         Res += utostr(OpR->getValueAsInt("RegClassKind")) + ", ";
       else
         // -1 means the operand does not have a fixed register class.
         Res += "-1, ";

       // Fill in applicable flags.
       Res += "0";

       // Ptr value whose register class is resolved via callback.
       if (OpR->isSubClassOf("PointerLikeRegClass"))
         Res += "|(1<<MCOI::LookupPtrRegClass)";

       // Predicate operands.  Check to see if the original unexpanded operand
       // was of type PredicateOperand.
       if (Inst.Operands[i].Rec->isSubClassOf("PredicateOperand"))
         Res += "|(1<<MCOI::Predicate)";

       // Optional def operands.  Check to see if the original unexpanded operand
       // was of type OptionalDefOperand.
       if (Inst.Operands[i].Rec->isSubClassOf("OptionalDefOperand"))
         Res += "|(1<<MCOI::OptionalDef)";

       // Fill in constraint info.
       Res += ", ";

       const CGIOperandList::ConstraintInfo &Constraint =
         Inst.Operands[i].Constraints[j];
       if (Constraint.isNone())
         Res += "0";
       else if (Constraint.isEarlyClobber())
         Res += "(1 << MCOI::EARLY_CLOBBER)";
       else {
         assert(Constraint.isTied());
         Res += "((" + utostr(Constraint.getTiedOperand()) +
                     " << 16) | (1 << MCOI::TIED_TO))";
       }

       // Fill in operand type.
       Res += ", MCOI::";
       assert(!Inst.Operands[i].OperandType.empty() && "Invalid operand type.");
       Res += Inst.Operands[i].OperandType;

       Result.push_back(Res);
     }
   }

   return Result;
 }

 void InstrInfoEmitter::EmitOperandInfo(raw_ostream &OS,
                                        OperandInfoMapTy &OperandInfoIDs) {
   // ID #0 is for no operand info.
   unsigned OperandListNum = 0;
   OperandInfoIDs[std::vector<std::string>()] = ++OperandListNum;

   OS << "\n";
   const CodeGenTarget &Target = CDP.getTargetInfo();
   for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
        E = Target.inst_end(); II != E; ++II) {
     std::vector<std::string> OperandInfo = GetOperandInfo(**II);
     unsigned &N = OperandInfoIDs[OperandInfo];
     if (N != 0) continue;

     N = ++OperandListNum;
     OS << "static const MCOperandInfo OperandInfo" << N << "[] = { ";
     for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i)
       OS << "{ " << OperandInfo[i] << " }, ";
     OS << "};\n";
   }
 }

 //===----------------------------------------------------------------------===//
 // Main Output.
 //===----------------------------------------------------------------------===//

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

   GatherItinClasses();

   EmitSourceFileHeader("Target Instruction Descriptors", OS);

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

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

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

   // 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 " << TargetName << "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";

   // MCInstrInfo initialization routine.
   OS << "static inline void Init" << TargetName
      << "MCInstrInfo(MCInstrInfo *II) {\n";
   OS << "  II->InitMCInstrInfo(" << TargetName << "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 << "extern MCInstrDesc " << TargetName << "Insts[];\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";
 }

 void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
                                   Record *InstrInfo,
                          std::map<std::vector<Record*>, unsigned> &EmittedLists,
                                   const OperandInfoMapTy &OpInfo,
                                   raw_ostream &OS) {
   int MinOperands = 0;
   if (!Inst.Operands.size() == 0)
     // Each logical operand can be multiple MI operands.
     MinOperands = Inst.Operands.back().MIOperandNo +
                   Inst.Operands.back().MINumOperands;

   OS << "  { ";
   OS << Num << ",\t" << MinOperands << ",\t"
      << Inst.Operands.NumDefs << ",\t"
      << getItinClassNumber(Inst.TheDef) << ",\t"
      << Inst.TheDef->getValueAsInt("Size") << ",\t\""
      << Inst.TheDef->getName() << "\", 0";

   // Emit all of the target indepedent flags...
   if (Inst.isPseudo)           OS << "|(1<<MCID::Pseudo)";
   if (Inst.isReturn)           OS << "|(1<<MCID::Return)";
   if (Inst.isBranch)           OS << "|(1<<MCID::Branch)";
   if (Inst.isIndirectBranch)   OS << "|(1<<MCID::IndirectBranch)";
   if (Inst.isCompare)          OS << "|(1<<MCID::Compare)";
   if (Inst.isMoveImm)          OS << "|(1<<MCID::MoveImm)";
   if (Inst.isBitcast)          OS << "|(1<<MCID::Bitcast)";
   if (Inst.isBarrier)          OS << "|(1<<MCID::Barrier)";
   if (Inst.hasDelaySlot)       OS << "|(1<<MCID::DelaySlot)";
   if (Inst.isCall)             OS << "|(1<<MCID::Call)";
   if (Inst.canFoldAsLoad)      OS << "|(1<<MCID::FoldableAsLoad)";
   if (Inst.mayLoad)            OS << "|(1<<MCID::MayLoad)";
   if (Inst.mayStore)           OS << "|(1<<MCID::MayStore)";
   if (Inst.isPredicable)       OS << "|(1<<MCID::Predicable)";
   if (Inst.isConvertibleToThreeAddress) OS << "|(1<<MCID::ConvertibleTo3Addr)";
   if (Inst.isCommutable)       OS << "|(1<<MCID::Commutable)";
   if (Inst.isTerminator)       OS << "|(1<<MCID::Terminator)";
   if (Inst.isReMaterializable) OS << "|(1<<MCID::Rematerializable)";
   if (Inst.isNotDuplicable)    OS << "|(1<<MCID::NotDuplicable)";
   if (Inst.Operands.hasOptionalDef) OS << "|(1<<MCID::HasOptionalDef)";
   if (Inst.usesCustomInserter) OS << "|(1<<MCID::UsesCustomInserter)";
   if (Inst.hasPostISelHook)    OS << "|(1<<MCID::HasPostISelHook)";
   if (Inst.Operands.isVariadic)OS << "|(1<<MCID::Variadic)";
   if (Inst.hasSideEffects)     OS << "|(1<<MCID::UnmodeledSideEffects)";
   if (Inst.isAsCheapAsAMove)   OS << "|(1<<MCID::CheapAsAMove)";
   if (Inst.hasExtraSrcRegAllocReq) OS << "|(1<<MCID::ExtraSrcRegAllocReq)";
   if (Inst.hasExtraDefRegAllocReq) OS << "|(1<<MCID::ExtraDefRegAllocReq)";

   // Emit all of the target-specific flags...
   BitsInit *TSF = Inst.TheDef->getValueAsBitsInit("TSFlags");
   if (!TSF) throw "no TSFlags?";
   uint64_t Value = 0;
   for (unsigned i = 0, e = TSF->getNumBits(); i != e; ++i) {
     if (BitInit *Bit = dynamic_cast<BitInit*>(TSF->getBit(i)))
       Value |= uint64_t(Bit->getValue()) << i;
     else
       throw "Invalid TSFlags bit in " + Inst.TheDef->getName();
   }
   OS << ", 0x";
   OS.write_hex(Value);
   OS << "ULL, ";

   // Emit the implicit uses and defs lists...
   std::vector<Record*> UseList = Inst.TheDef->getValueAsListOfDefs("Uses");
   if (UseList.empty())
     OS << "NULL, ";
   else
     OS << "ImplicitList" << EmittedLists[UseList] << ", ";

   std::vector<Record*> DefList = Inst.TheDef->getValueAsListOfDefs("Defs");
   if (DefList.empty())
     OS << "NULL, ";
   else
     OS << "ImplicitList" << EmittedLists[DefList] << ", ";

   // Emit the operand info.
   std::vector<std::string> OperandInfo = GetOperandInfo(Inst);
   if (OperandInfo.empty())
     OS << "0";
   else
     OS << "OperandInfo" << OpInfo.find(OperandInfo)->second;

   OS << " },  // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
 }

 // emitEnums - Print out enum values for all of the instructions.
 void InstrInfoEmitter::emitEnums(raw_ostream &OS) {
   EmitSourceFileHeader("Target Instruction Enum Values", OS);

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

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

   CodeGenTarget Target(Records);

   // We must emit the PHI opcode first...
   std::string Namespace = Target.getInstNamespace();

   if (Namespace.empty()) {
     fprintf(stderr, "No instructions defined!\n");
     exit(1);
   }

   const std::vector<const CodeGenInstruction*> &NumberedInstructions =
     Target.getInstructionsByEnumValue();

   OS << "namespace " << Namespace << " {\n";
   OS << "  enum {\n";
   for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
     OS << "    " << NumberedInstructions[i]->TheDef->getName()
        << "\t= " << i << ",\n";
   }
   OS << "    INSTRUCTION_LIST_END = " << NumberedInstructions.size() << "\n";
   OS << "  };\n}\n";
   OS << "} // End llvm namespace \n";

   OS << "#endif // GET_INSTRINFO_ENUM\n\n";
 }
	//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// This tablegen backend is responsible for emitting a description of the target
	// instruction set for the code generator.
	//
	//===----------------------------------------------------------------------===//

	#include "InstrInfoEmitter.h"
	#include "CodeGenTarget.h"
	#include "llvm/TableGen/Record.h"
	#include "llvm/ADT/StringExtras.h"
	#include <algorithm>
	using namespace llvm;

	static void PrintDefList(const std::vector<Record*> &Uses,
	unsigned Num, raw_ostream &OS) {
	OS << "static const unsigned ImplicitList" << Num << "[] = { ";
	for (unsigned i = 0, e = Uses.size(); i != e; ++i)
	OS << getQualifiedName(Uses[i]) << ", ";
	OS << "0 };\n";
	}

	//===----------------------------------------------------------------------===//
	// Instruction Itinerary Information.
	//===----------------------------------------------------------------------===//

	void InstrInfoEmitter::GatherItinClasses() {
	std::vector<Record*> DefList =
	Records.getAllDerivedDefinitions("InstrItinClass");
	std::sort(DefList.begin(), DefList.end(), LessRecord());

	for (unsigned i = 0, N = DefList.size(); i < N; i++)
	ItinClassMap[DefList[i]->getName()] = i;
	}

	unsigned InstrInfoEmitter::getItinClassNumber(const Record *InstRec) {
	return ItinClassMap[InstRec->getValueAsDef("Itinerary")->getName()];
	}

	//===----------------------------------------------------------------------===//
	// Operand Info Emission.
	//===----------------------------------------------------------------------===//

	std::vector<std::string>
	InstrInfoEmitter::GetOperandInfo(const CodeGenInstruction &Inst) {
	std::vector<std::string> Result;

	for (unsigned i = 0, e = Inst.Operands.size(); i != e; ++i) {
	// Handle aggregate operands and normal operands the same way by expanding
	// either case into a list of operands for this op.
	std::vector<CGIOperandList::OperandInfo> OperandList;

	// This might be a multiple operand thing. Targets like X86 have
	// registers in their multi-operand operands. It may also be an anonymous
	// operand, which has a single operand, but no declared class for the
	// operand.
	DagInit *MIOI = Inst.Operands[i].MIOperandInfo;

	if (!MIOI \|\| MIOI->getNumArgs() == 0) {
	// Single, anonymous, operand.
	OperandList.push_back(Inst.Operands[i]);
	} else {
	for (unsigned j = 0, e = Inst.Operands[i].MINumOperands; j != e; ++j) {
	OperandList.push_back(Inst.Operands[i]);

	Record OpR = dynamic_cast<DefInit>(MIOI->getArg(j))->getDef();
	OperandList.back().Rec = OpR;
	}
	}

	for (unsigned j = 0, e = OperandList.size(); j != e; ++j) {
	Record *OpR = OperandList[j].Rec;
	std::string Res;

	if (OpR->isSubClassOf("RegisterOperand"))
	OpR = OpR->getValueAsDef("RegClass");
	if (OpR->isSubClassOf("RegisterClass"))
	Res += getQualifiedName(OpR) + "RegClassID, ";
	else if (OpR->isSubClassOf("PointerLikeRegClass"))
	Res += utostr(OpR->getValueAsInt("RegClassKind")) + ", ";
	else
	// -1 means the operand does not have a fixed register class.
	Res += "-1, ";

	// Fill in applicable flags.
	Res += "0";

	// Ptr value whose register class is resolved via callback.
	if (OpR->isSubClassOf("PointerLikeRegClass"))
	Res += "\|(1<<MCOI::LookupPtrRegClass)";

	// Predicate operands. Check to see if the original unexpanded operand
	// was of type PredicateOperand.
	if (Inst.Operands[i].Rec->isSubClassOf("PredicateOperand"))
	Res += "\|(1<<MCOI::Predicate)";

	// Optional def operands. Check to see if the original unexpanded operand
	// was of type OptionalDefOperand.
	if (Inst.Operands[i].Rec->isSubClassOf("OptionalDefOperand"))
	Res += "\|(1<<MCOI::OptionalDef)";

	// Fill in constraint info.
	Res += ", ";

	const CGIOperandList::ConstraintInfo &Constraint =
	Inst.Operands[i].Constraints[j];
	if (Constraint.isNone())
	Res += "0";
	else if (Constraint.isEarlyClobber())
	Res += "(1 << MCOI::EARLY_CLOBBER)";
	else {
	assert(Constraint.isTied());
	Res += "((" + utostr(Constraint.getTiedOperand()) +
	" << 16) \| (1 << MCOI::TIED_TO))";
	}

	// Fill in operand type.
	Res += ", MCOI::";
	assert(!Inst.Operands[i].OperandType.empty() && "Invalid operand type.");
	Res += Inst.Operands[i].OperandType;

	Result.push_back(Res);
	}
	}

	return Result;
	}

	void InstrInfoEmitter::EmitOperandInfo(raw_ostream &OS,
	OperandInfoMapTy &OperandInfoIDs) {
	// ID #0 is for no operand info.
	unsigned OperandListNum = 0;
	OperandInfoIDs[std::vector<std::string>()] = ++OperandListNum;

	OS << "\n";
	const CodeGenTarget &Target = CDP.getTargetInfo();
	for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
	E = Target.inst_end(); II != E; ++II) {
	std::vector<std::string> OperandInfo = GetOperandInfo(**II);
	unsigned &N = OperandInfoIDs[OperandInfo];
	if (N != 0) continue;

	N = ++OperandListNum;
	OS << "static const MCOperandInfo OperandInfo" << N << "[] = { ";
	for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i)
	OS << "{ " << OperandInfo[i] << " }, ";
	OS << "};\n";
	}
	}

	//===----------------------------------------------------------------------===//
	// Main Output.
	//===----------------------------------------------------------------------===//

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

	GatherItinClasses();

	EmitSourceFileHeader("Target Instruction Descriptors", OS);

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

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

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

	// 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 " << TargetName << "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";

	// MCInstrInfo initialization routine.
	OS << "static inline void Init" << TargetName
	<< "MCInstrInfo(MCInstrInfo *II) {\n";
	OS << " II->InitMCInstrInfo(" << TargetName << "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 << "extern MCInstrDesc " << TargetName << "Insts[];\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";
	}

	void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
	Record *InstrInfo,
	std::map<std::vector<Record*>, unsigned> &EmittedLists,
	const OperandInfoMapTy &OpInfo,
	raw_ostream &OS) {
	int MinOperands = 0;
	if (!Inst.Operands.size() == 0)
	// Each logical operand can be multiple MI operands.
	MinOperands = Inst.Operands.back().MIOperandNo +
	Inst.Operands.back().MINumOperands;

	OS << " { ";
	OS << Num << ",\t" << MinOperands << ",\t"
	<< Inst.Operands.NumDefs << ",\t"
	<< getItinClassNumber(Inst.TheDef) << ",\t"
	<< Inst.TheDef->getValueAsInt("Size") << ",\t\""
	<< Inst.TheDef->getName() << "\", 0";

	// Emit all of the target indepedent flags...
	if (Inst.isPseudo) OS << "\|(1<<MCID::Pseudo)";
	if (Inst.isReturn) OS << "\|(1<<MCID::Return)";
	if (Inst.isBranch) OS << "\|(1<<MCID::Branch)";
	if (Inst.isIndirectBranch) OS << "\|(1<<MCID::IndirectBranch)";
	if (Inst.isCompare) OS << "\|(1<<MCID::Compare)";
	if (Inst.isMoveImm) OS << "\|(1<<MCID::MoveImm)";
	if (Inst.isBitcast) OS << "\|(1<<MCID::Bitcast)";
	if (Inst.isBarrier) OS << "\|(1<<MCID::Barrier)";
	if (Inst.hasDelaySlot) OS << "\|(1<<MCID::DelaySlot)";
	if (Inst.isCall) OS << "\|(1<<MCID::Call)";
	if (Inst.canFoldAsLoad) OS << "\|(1<<MCID::FoldableAsLoad)";
	if (Inst.mayLoad) OS << "\|(1<<MCID::MayLoad)";
	if (Inst.mayStore) OS << "\|(1<<MCID::MayStore)";
	if (Inst.isPredicable) OS << "\|(1<<MCID::Predicable)";
	if (Inst.isConvertibleToThreeAddress) OS << "\|(1<<MCID::ConvertibleTo3Addr)";
	if (Inst.isCommutable) OS << "\|(1<<MCID::Commutable)";
	if (Inst.isTerminator) OS << "\|(1<<MCID::Terminator)";
	if (Inst.isReMaterializable) OS << "\|(1<<MCID::Rematerializable)";
	if (Inst.isNotDuplicable) OS << "\|(1<<MCID::NotDuplicable)";
	if (Inst.Operands.hasOptionalDef) OS << "\|(1<<MCID::HasOptionalDef)";
	if (Inst.usesCustomInserter) OS << "\|(1<<MCID::UsesCustomInserter)";
	if (Inst.hasPostISelHook) OS << "\|(1<<MCID::HasPostISelHook)";
	if (Inst.Operands.isVariadic)OS << "\|(1<<MCID::Variadic)";
	if (Inst.hasSideEffects) OS << "\|(1<<MCID::UnmodeledSideEffects)";
	if (Inst.isAsCheapAsAMove) OS << "\|(1<<MCID::CheapAsAMove)";
	if (Inst.hasExtraSrcRegAllocReq) OS << "\|(1<<MCID::ExtraSrcRegAllocReq)";
	if (Inst.hasExtraDefRegAllocReq) OS << "\|(1<<MCID::ExtraDefRegAllocReq)";

	// Emit all of the target-specific flags...
	BitsInit *TSF = Inst.TheDef->getValueAsBitsInit("TSFlags");
	if (!TSF) throw "no TSFlags?";
	uint64_t Value = 0;
	for (unsigned i = 0, e = TSF->getNumBits(); i != e; ++i) {
	if (BitInit Bit = dynamic_cast<BitInit>(TSF->getBit(i)))
	Value \|= uint64_t(Bit->getValue()) << i;
	else
	throw "Invalid TSFlags bit in " + Inst.TheDef->getName();
	}
	OS << ", 0x";
	OS.write_hex(Value);
	OS << "ULL, ";

	// Emit the implicit uses and defs lists...
	std::vector<Record*> UseList = Inst.TheDef->getValueAsListOfDefs("Uses");
	if (UseList.empty())
	OS << "NULL, ";
	else
	OS << "ImplicitList" << EmittedLists[UseList] << ", ";

	std::vector<Record*> DefList = Inst.TheDef->getValueAsListOfDefs("Defs");
	if (DefList.empty())
	OS << "NULL, ";
	else
	OS << "ImplicitList" << EmittedLists[DefList] << ", ";

	// Emit the operand info.
	std::vector<std::string> OperandInfo = GetOperandInfo(Inst);
	if (OperandInfo.empty())
	OS << "0";
	else
	OS << "OperandInfo" << OpInfo.find(OperandInfo)->second;

	OS << " }, // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
	}

	// emitEnums - Print out enum values for all of the instructions.
	void InstrInfoEmitter::emitEnums(raw_ostream &OS) {
	EmitSourceFileHeader("Target Instruction Enum Values", OS);

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

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

	CodeGenTarget Target(Records);

	// We must emit the PHI opcode first...
	std::string Namespace = Target.getInstNamespace();

	if (Namespace.empty()) {
	fprintf(stderr, "No instructions defined!\n");
	exit(1);
	}

	const std::vector<const CodeGenInstruction*> &NumberedInstructions =
	Target.getInstructionsByEnumValue();

	OS << "namespace " << Namespace << " {\n";
	OS << " enum {\n";
	for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
	OS << " " << NumberedInstructions[i]->TheDef->getName()
	<< "\t= " << i << ",\n";
	}
	OS << " INSTRUCTION_LIST_END = " << NumberedInstructions.size() << "\n";
	OS << " };\n}\n";
	OS << "} // End llvm namespace \n";

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