+/// Generate a table and function for looking up the indices of operands by
+/// name.
+///
+/// This code generates:
+/// - An enum in the llvm::TargetNamespace::OpName namespace, with one entry
+/// for each operand name.
+/// - A 2-dimensional table called OperandMap for mapping OpName enum values to
+/// operand indices.
+/// - A function called getNamedOperandIdx(uint16_t Opcode, uint16_t NamedIdx)
+/// for looking up the operand index for an instruction, given a value from
+/// OpName enum
+void InstrInfoEmitter::emitOperandNameMappings(raw_ostream &OS,
+ const CodeGenTarget &Target,
+ const std::vector<const CodeGenInstruction*> &NumberedInstructions) {
+
+ const std::string &Namespace = Target.getInstNamespace();
+ std::string OpNameNS = "OpName";
+ // Map of operand names to their enumeration value. This will be used to
+ // generate the OpName enum.
+ std::map<std::string, unsigned> Operands;
+ OpNameMapTy OperandMap;
+
+ initOperandMapData(NumberedInstructions, Namespace, Operands, OperandMap);
+
+ OS << "#ifdef GET_INSTRINFO_OPERAND_ENUM\n";
+ OS << "#undef GET_INSTRINFO_OPERAND_ENUM\n";
+ OS << "namespace llvm {";
+ OS << "namespace " << Namespace << " {\n";
+ OS << "namespace " << OpNameNS << " { \n";
+ OS << "enum {\n";
+ for (const auto &Op : Operands)
+ OS << " " << Op.first << " = " << Op.second << ",\n";
+
+ OS << "OPERAND_LAST";
+ OS << "\n};\n";
+ OS << "} // End namespace OpName\n";
+ OS << "} // End namespace " << Namespace << "\n";
+ OS << "} // End namespace llvm\n";
+ OS << "#endif //GET_INSTRINFO_OPERAND_ENUM\n";
+
+ OS << "#ifdef GET_INSTRINFO_NAMED_OPS\n";
+ OS << "#undef GET_INSTRINFO_NAMED_OPS\n";
+ OS << "namespace llvm {";
+ OS << "namespace " << Namespace << " {\n";
+ OS << "LLVM_READONLY\n";
+ OS << "int16_t getNamedOperandIdx(uint16_t Opcode, uint16_t NamedIdx) {\n";
+ if (!Operands.empty()) {
+ OS << " static const int16_t OperandMap [][" << Operands.size()
+ << "] = {\n";
+ for (const auto &Entry : OperandMap) {
+ const std::map<unsigned, unsigned> &OpList = Entry.first;
+ OS << "{";
+
+ // Emit a row of the OperandMap table
+ for (unsigned i = 0, e = Operands.size(); i != e; ++i)
+ OS << (OpList.count(i) == 0 ? -1 : (int)OpList.find(i)->second) << ", ";
+
+ OS << "},\n";
+ }
+ OS << "};\n";
+
+ OS << " switch(Opcode) {\n";
+ unsigned TableIndex = 0;
+ for (const auto &Entry : OperandMap) {
+ for (const std::string &Name : Entry.second)
+ OS << " case " << Name << ":\n";
+
+ OS << " return OperandMap[" << TableIndex++ << "][NamedIdx];\n";
+ }
+ OS << " default: return -1;\n";
+ OS << " }\n";
+ } else {
+ // There are no operands, so no need to emit anything
+ OS << " return -1;\n";
+ }
+ OS << "}\n";
+ OS << "} // End namespace " << Namespace << "\n";
+ OS << "} // End namespace llvm\n";
+ OS << "#endif //GET_INSTRINFO_NAMED_OPS\n";
+
+}
+
+/// Generate an enum for all the operand types for this target, under the
+/// llvm::TargetNamespace::OpTypes namespace.
+/// Operand types are all definitions derived of the Operand Target.td class.
+void InstrInfoEmitter::emitOperandTypesEnum(raw_ostream &OS,
+ const CodeGenTarget &Target) {
+
+ const std::string &Namespace = Target.getInstNamespace();
+ std::vector<Record *> Operands = Records.getAllDerivedDefinitions("Operand");
+
+ OS << "\n#ifdef GET_INSTRINFO_OPERAND_TYPES_ENUM\n";
+ OS << "#undef GET_INSTRINFO_OPERAND_TYPES_ENUM\n";
+ OS << "namespace llvm {";
+ OS << "namespace " << Namespace << " {\n";
+ OS << "namespace OpTypes { \n";
+ OS << "enum OperandType {\n";
+
+ unsigned EnumVal = 0;
+ for (const Record *Op : Operands) {
+ if (!Op->isAnonymous())
+ OS << " " << Op->getName() << " = " << EnumVal << ",\n";
+ ++EnumVal;
+ }
+
+ OS << " OPERAND_TYPE_LIST_END" << "\n};\n";
+ OS << "} // End namespace OpTypes\n";
+ OS << "} // End namespace " << Namespace << "\n";
+ OS << "} // End namespace llvm\n";
+ OS << "#endif // GET_INSTRINFO_OPERAND_TYPES_ENUM\n";
+}
+