diff options
Diffstat (limited to 'utils/TableGen/RegisterInfoEmitter.cpp')
-rw-r--r-- | utils/TableGen/RegisterInfoEmitter.cpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp index 0e273bc989..ac89e25843 100644 --- a/utils/TableGen/RegisterInfoEmitter.cpp +++ b/utils/TableGen/RegisterInfoEmitter.cpp @@ -118,6 +118,75 @@ RegisterInfoEmitter::runEnums(raw_ostream &OS, OS << "#endif // GET_REGINFO_ENUM\n\n"; } +void RegisterInfoEmitter:: +EmitRegUnitPressure(raw_ostream &OS, const CodeGenRegBank &RegBank, + const std::string &ClassName) { + unsigned NumRCs = RegBank.getRegClasses().size(); + unsigned NumSets = RegBank.getNumRegPressureSets(); + + OS << "/// Get the weight in units of pressure for this register class.\n" + << "unsigned " << ClassName << "::\n" + << "getRegClassWeight(const TargetRegisterClass *RC) const {\n" + << " static const unsigned RCWeightTable[] = {\n"; + for (unsigned i = 0, e = NumRCs; i != e; ++i) { + const CodeGenRegisterClass &RC = *RegBank.getRegClasses()[i]; + const CodeGenRegister::Set &Regs = RC.getMembers(); + if (Regs.empty()) + OS << " 0"; + else + OS << " " << (*Regs.begin())->getWeight(RegBank); + OS << ", \t// " << RC.getName() << "\n"; + } + OS << " 0 };\n" + << " return RCWeightTable[RC->getID()];\n" + << "}\n\n"; + + OS << "\n" + << "// Get the number of dimensions of register pressure.\n" + << "unsigned " << ClassName << "::getNumRegPressureSets() const {\n" + << " return " << NumSets << ";\n}\n\n"; + + OS << "// Get the register unit pressure limit for this dimension.\n" + << "// This limit must be adjusted dynamically for reserved registers.\n" + << "unsigned " << ClassName << "::\n" + << "getRegPressureSetLimit(unsigned Idx) const {\n" + << " static const unsigned PressureLimitTable[] = {\n"; + for (unsigned i = 0; i < NumSets; ++i ) { + OS << " " << RegBank.getRegPressureSet(i).Units.size() + << ", \t// " << i << ": " << RegBank.getRegPressureSet(i).Name << "\n"; + } + OS << " 0 };\n" + << " return PressureLimitTable[Idx];\n" + << "}\n\n"; + + OS << "/// Get the dimensions of register pressure " + << "impacted by this register class.\n" + << "/// Returns a -1 terminated array of pressure set IDs\n" + << "const int* " << ClassName << "::\n" + << "getRegClassPressureSets(const TargetRegisterClass *RC) const {\n" + << " static const int RCSetsTable[] = {\n "; + std::vector<unsigned> RCSetStarts(NumRCs); + for (unsigned i = 0, StartIdx = 0, e = NumRCs; i != e; ++i) { + RCSetStarts[i] = StartIdx; + ArrayRef<unsigned> PSetIDs = RegBank.getRCPressureSetIDs(i); + for (ArrayRef<unsigned>::iterator PSetI = PSetIDs.begin(), + PSetE = PSetIDs.end(); PSetI != PSetE; ++PSetI) { + OS << *PSetI << ", "; + ++StartIdx; + } + OS << "-1, \t// " << RegBank.getRegClasses()[i]->getName() << "\n "; + ++StartIdx; + } + OS << "-1 };\n"; + OS << " static const unsigned RCSetStartTable[] = {\n "; + for (unsigned i = 0, e = NumRCs; i != e; ++i) { + OS << RCSetStarts[i] << ","; + } + OS << "0 };\n" + << " unsigned SetListStart = RCSetStartTable[RC->getID()];\n" + << " return &RCSetsTable[SetListStart];\n" + << "}\n\n"; +} void RegisterInfoEmitter::EmitRegMappingTables(raw_ostream &OS, @@ -593,6 +662,11 @@ RegisterInfoEmitter::runTargetHeader(raw_ostream &OS, CodeGenTarget &Target, << " const TargetRegisterClass *getMatchingSuperRegClass(" "const TargetRegisterClass*, const TargetRegisterClass*, " "unsigned) const;\n" + << " unsigned getRegClassWeight(const TargetRegisterClass *RC) const;\n" + << " unsigned getNumRegPressureSets() const;\n" + << " unsigned getRegPressureSetLimit(unsigned Idx) const;\n" + << " const int *getRegClassPressureSets(" + << "const TargetRegisterClass *RC) const;\n" << "};\n\n"; ArrayRef<CodeGenRegisterClass*> RegisterClasses = RegBank.getRegClasses(); @@ -961,6 +1035,8 @@ RegisterInfoEmitter::runTargetDesc(raw_ostream &OS, CodeGenTarget &Target, } OS << "}\n\n"; + EmitRegUnitPressure(OS, RegBank, ClassName); + // Emit the constructor of the class... OS << "extern const MCRegisterDesc " << TargetName << "RegDesc[];\n"; OS << "extern const uint16_t " << TargetName << "RegLists[];\n"; |