diff options
Diffstat (limited to 'utils/TableGen/InstrInfoEmitter.cpp')
| -rw-r--r-- | utils/TableGen/InstrInfoEmitter.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp index d6020a8461..1df8ae54c7 100644 --- a/utils/TableGen/InstrInfoEmitter.cpp +++ b/utils/TableGen/InstrInfoEmitter.cpp @@ -45,11 +45,25 @@ private: void emitEnums(raw_ostream &OS); typedef std::map<std::vector<std::string>, unsigned> OperandInfoMapTy; + + /// The keys of this map are maps which have OpName enum values as their keys + /// and instruction operand indices as their values. The values of this map + /// are lists of instruction names. + typedef std::map<std::map<unsigned, unsigned>, + std::vector<std::string> > OpNameMapTy; + typedef std::map<std::string, unsigned>::iterator StrUintMapIter; void emitRecord(const CodeGenInstruction &Inst, unsigned Num, Record *InstrInfo, std::map<std::vector<Record*>, unsigned> &EL, const OperandInfoMapTy &OpInfo, raw_ostream &OS); + void initOperandMapData( + const std::vector<const CodeGenInstruction *> NumberedInstructions, + const std::string &Namespace, + std::map<std::string, unsigned> &Operands, + OpNameMapTy &OperandMap); + void emitOperandNameMappings(raw_ostream &OS, const CodeGenTarget &Target, + const std::vector<const CodeGenInstruction*> &NumberedInstructions); // Operand information. void EmitOperandInfo(raw_ostream &OS, OperandInfoMapTy &OperandInfoIDs); @@ -176,6 +190,120 @@ void InstrInfoEmitter::EmitOperandInfo(raw_ostream &OS, } } + +/// Initialize data structures for generating operand name mappings. +/// +/// \param Operands [out] A map used to generate the OpName enum with operand +/// names as its keys and operand enum values as its values. +/// \param OperandMap [out] A map for representing the operand name mappings for +/// each instructions. This is used to generate the OperandMap table as +/// well as the getNamedOperandIdx() function. +void InstrInfoEmitter::initOperandMapData( + const std::vector<const CodeGenInstruction *> NumberedInstructions, + const std::string &Namespace, + std::map<std::string, unsigned> &Operands, + OpNameMapTy &OperandMap) { + + unsigned NumOperands = 0; + for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) { + const CodeGenInstruction *Inst = NumberedInstructions[i]; + if (!Inst->TheDef->getValueAsBit("UseNamedOperandTable")) { + continue; + } + std::map<unsigned, unsigned> OpList; + for (unsigned j = 0, je = Inst->Operands.size(); j != je; ++j) { + const CGIOperandList::OperandInfo &Info = Inst->Operands[j]; + StrUintMapIter I = Operands.find(Info.Name); + + if (I == Operands.end()) { + I = Operands.insert(Operands.begin(), + std::pair<std::string, unsigned>(Info.Name, NumOperands++)); + } + OpList[I->second] = Info.MIOperandNo; + } + OperandMap[OpList].push_back(Namespace + "::" + Inst->TheDef->getName()); + } +} + +/// 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 (StrUintMapIter i = Operands.begin(), e = Operands.end(); i != e; ++i) + OS << " " << i->first << " = " << i->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 << "int16_t getNamedOperandIdx(uint16_t Opcode, uint16_t NamedIdx) {\n"; + OS << " static const int16_t OperandMap []["<< Operands.size() << "] = {\n"; + for (OpNameMapTy::iterator i = OperandMap.begin(), e = OperandMap.end(); + i != e; ++i) { + const std::map<unsigned, unsigned> &OpList = i->first; + OS << "{"; + + // Emit a row of the OperandMap table + for (unsigned ii = 0, ie = Operands.size(); ii != ie; ++ii) + OS << (OpList.count(ii) == 0 ? -1 : (int)OpList.find(ii)->second) << ", "; + + OS << "},\n"; + } + OS << "};\n"; + + OS << " switch(Opcode) {\n"; + unsigned TableIndex = 0; + for (OpNameMapTy::iterator i = OperandMap.begin(), e = OperandMap.end(); + i != e; ++i) { + std::vector<std::string> &OpcodeList = i->second; + + for (unsigned ii = 0, ie = OpcodeList.size(); ii != ie; ++ii) + OS << " case " << OpcodeList[ii] << ":\n"; + + OS << " return OperandMap[" << TableIndex++ << "][NamedIdx];\n"; + } + OS << " default: return -1;\n"; + OS << " }\n"; + OS << "}\n"; + OS << "} // End namespace " << Namespace << "\n"; + OS << "} // End namespace llvm\n"; + OS << "#endif //GET_INSTRINFO_NAMED_OPS\n"; + +} + //===----------------------------------------------------------------------===// // Main Output. //===----------------------------------------------------------------------===// @@ -293,6 +421,8 @@ void InstrInfoEmitter::run(raw_ostream &OS) { OS << "} // End llvm namespace \n"; OS << "#endif // GET_INSTRINFO_CTOR\n\n"; + + emitOperandNameMappings(OS, Target, NumberedInstructions); } void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num, |