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Diffstat (limited to 'support/tools/TableGen/RegisterInfoEmitter.cpp')
-rw-r--r-- | support/tools/TableGen/RegisterInfoEmitter.cpp | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/support/tools/TableGen/RegisterInfoEmitter.cpp b/support/tools/TableGen/RegisterInfoEmitter.cpp deleted file mode 100644 index af3efe3a9c..0000000000 --- a/support/tools/TableGen/RegisterInfoEmitter.cpp +++ /dev/null @@ -1,234 +0,0 @@ -//===- RegisterInfoEmitter.cpp - Generate a Register File Desc. -*- C++ -*-===// -// -// This tablegen backend is responsible for emitting a description of a target -// register file for a code generator. It uses instances of the Register, -// RegisterAliases, and RegisterClass classes to gather this information. -// -//===----------------------------------------------------------------------===// - -#include "RegisterInfoEmitter.h" -#include "CodeGenWrappers.h" -#include "Record.h" -#include "Support/StringExtras.h" -#include <set> - -// runEnums - Print out enum values for all of the registers. -void RegisterInfoEmitter::runEnums(std::ostream &OS) { - std::vector<Record*> Registers = Records.getAllDerivedDefinitions("Register"); - - if (Registers.size() == 0) - throw std::string("No 'Register' subclasses defined!"); - - std::string Namespace = Registers[0]->getValueAsString("Namespace"); - - EmitSourceFileHeader("Target Register Enum Values", OS); - - if (!Namespace.empty()) - OS << "namespace " << Namespace << " {\n"; - OS << " enum {\n NoRegister,\n"; - - for (unsigned i = 0, e = Registers.size(); i != e; ++i) - OS << " " << Registers[i]->getName() << ", \t// " << i+1 << "\n"; - - OS << " };\n"; - if (!Namespace.empty()) - OS << "}\n"; -} - -void RegisterInfoEmitter::runHeader(std::ostream &OS) { - EmitSourceFileHeader("Register Information Header Fragment", OS); - const std::string &TargetName = CodeGenTarget().getName(); - std::string ClassName = TargetName + "GenRegisterInfo"; - - OS << "#include \"llvm/Target/MRegisterInfo.h\"\n\n"; - - OS << "struct " << ClassName << " : public MRegisterInfo {\n" - << " " << ClassName - << "(int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n" - << " const unsigned* getCalleeSaveRegs() const;\n" - << "};\n\n"; - - std::vector<Record*> RegisterClasses = - Records.getAllDerivedDefinitions("RegisterClass"); - - OS << "namespace " << TargetName << " { // Register classes\n"; - for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) { - if (RegisterClasses[i]->getValueAsBit("isDummyClass")) - continue; // Ignore dummies - - const std::string &Name = RegisterClasses[i]->getName(); - if (Name.size() < 9 || Name[9] != '.') // Ignore anonymous classes - OS << " extern TargetRegisterClass *" << Name << "RegisterClass;\n"; - } - OS << "} // end of namespace " << TargetName << "\n\n"; -} - -// RegisterInfoEmitter::run - Main register file description emitter. -// -void RegisterInfoEmitter::run(std::ostream &OS) { - EmitSourceFileHeader("Register Information Source Fragment", OS); - - // Start out by emitting each of the register classes... to do this, we build - // a set of registers which belong to a register class, this is to ensure that - // each register is only in a single register class. - // - std::vector<Record*> RegisterClasses = - Records.getAllDerivedDefinitions("RegisterClass"); - - std::vector<Record*> Registers = Records.getAllDerivedDefinitions("Register"); - - std::set<Record*> RegistersFound; - std::vector<std::string> RegClassNames; - - // Loop over all of the register classes... emitting each one. - OS << "namespace { // Register classes...\n"; - - for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) { - Record *RC = RegisterClasses[rc]; - if (RC->getValueAsBit("isDummyClass")) continue; // Ignore dummies - - std::string Name = RC->getName(); - if (Name.size() > 9 && Name[9] == '.') { - static unsigned AnonCounter = 0; - Name = "AnonRegClass_"+utostr(AnonCounter++); - } - - RegClassNames.push_back(Name); - - // Emit the register list now... - OS << " // " << Name << " Register Class...\n const unsigned " << Name - << "[] = {\n "; - ListInit *RegList = RC->getValueAsListInit("MemberList"); - for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) { - DefInit *RegDef = dynamic_cast<DefInit*>(RegList->getElement(i)); - if (!RegDef) throw "Register class member is not a record!"; - Record *Reg = RegDef->getDef(); - if (!Reg->isSubClassOf("Register")) - throw "Register Class member '" + Reg->getName() + - " does not derive from the Register class!"; - if (RegistersFound.count(Reg)) - throw "Register '" + Reg->getName() + - "' included in multiple register classes!"; - RegistersFound.insert(Reg); - OS << getQualifiedName(Reg) << ", "; - } - OS << "\n };\n\n"; - - OS << " struct " << Name << "Class : public TargetRegisterClass {\n" - << " " << Name << "Class() : TargetRegisterClass(" - << RC->getValueAsInt("Size")/8 << ", " << RC->getValueAsInt("Alignment") - << ", " << Name << ", " << Name << " + " << RegList->getSize() - << ") {}\n"; - - if (CodeInit *CI = dynamic_cast<CodeInit*>(RC->getValueInit("Methods"))) - OS << CI->getValue(); - else - throw "Expected 'code' fragment for 'Methods' value in register class '"+ - RC->getName() + "'!"; - - OS << " } " << Name << "Instance;\n\n"; - } - - OS << " const TargetRegisterClass* const RegisterClasses[] = {\n"; - for (unsigned i = 0, e = RegClassNames.size(); i != e; ++i) - OS << " &" << RegClassNames[i] << "Instance,\n"; - OS << " };\n"; - - // Emit register class aliases... - std::vector<Record*> RegisterAliasesRecs = - Records.getAllDerivedDefinitions("RegisterAliases"); - std::map<Record*, std::set<Record*> > RegisterAliases; - - for (unsigned i = 0, e = RegisterAliasesRecs.size(); i != e; ++i) { - Record *AS = RegisterAliasesRecs[i]; - Record *R = AS->getValueAsDef("Reg"); - ListInit *LI = AS->getValueAsListInit("Aliases"); - - // Add information that R aliases all of the elements in the list... and - // that everything in the list aliases R. - for (unsigned j = 0, e = LI->getSize(); j != e; ++j) { - DefInit *Reg = dynamic_cast<DefInit*>(LI->getElement(j)); - if (!Reg) throw "ERROR: Alias list element is not a def!"; - if (RegisterAliases[R].count(Reg->getDef())) - std::cerr << "Warning: register alias between " << getQualifiedName(R) - << " and " << getQualifiedName(Reg->getDef()) - << " specified multiple times!\n"; - RegisterAliases[R].insert(Reg->getDef()); - - if (RegisterAliases[Reg->getDef()].count(R)) - std::cerr << "Warning: register alias between " << getQualifiedName(R) - << " and " << getQualifiedName(Reg->getDef()) - << " specified multiple times!\n"; - RegisterAliases[Reg->getDef()].insert(R); - } - } - - if (!RegisterAliases.empty()) - OS << "\n\n // Register Alias Sets...\n"; - - // Loop over all of the registers which have aliases, emitting the alias list - // to memory. - for (std::map<Record*, std::set<Record*> >::iterator - I = RegisterAliases.begin(), E = RegisterAliases.end(); I != E; ++I) { - OS << " const unsigned " << I->first->getName() << "_AliasSet[] = { "; - for (std::set<Record*>::iterator ASI = I->second.begin(), - E = I->second.end(); ASI != E; ++ASI) - OS << getQualifiedName(*ASI) << ", "; - OS << "0 };\n"; - } - - OS << "\n const MRegisterDesc RegisterDescriptors[] = { // Descriptors\n"; - OS << " { \"NOREG\",\t0,\t\t0,\t0 },\n"; - // Now that register alias sets have been emitted, emit the register - // descriptors now. - for (unsigned i = 0, e = Registers.size(); i != e; ++i) { - Record *Reg = Registers[i]; - OS << " { \""; - if (!Reg->getValueAsString("Name").empty()) - OS << Reg->getValueAsString("Name"); - else - OS << Reg->getName(); - OS << "\",\t"; - if (RegisterAliases.count(Reg)) - OS << Reg->getName() << "_AliasSet,\t"; - else - OS << "0,\t\t"; - OS << "0, 0 },\n"; - } - OS << " };\n"; // End of register descriptors... - OS << "}\n\n"; // End of anonymous namespace... - - CodeGenTarget Target; - - OS << "namespace " << Target.getName() << " { // Register classes\n"; - for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) { - if (RegisterClasses[i]->getValueAsBit("isDummyClass")) - continue; // Ignore dummies - - const std::string &Name = RegisterClasses[i]->getName(); - if (Name.size() < 9 || Name[9] != '.') // Ignore anonymous classes - OS << " TargetRegisterClass *" << Name << "RegisterClass = &" - << Name << "Instance;\n"; - } - OS << "} // end of namespace " << Target.getName() << "\n\n"; - - - - std::string ClassName = Target.getName() + "GenRegisterInfo"; - - // Emit the constructor of the class... - OS << ClassName << "::" << ClassName - << "(int CallFrameSetupOpcode, int CallFrameDestroyOpcode)\n" - << " : MRegisterInfo(RegisterDescriptors, " << Registers.size()+1 - << ", RegisterClasses, RegisterClasses+" << RegClassNames.size() << ",\n " - << " CallFrameSetupOpcode, CallFrameDestroyOpcode) {}\n\n"; - - // Emit the getCalleeSaveRegs method... - OS << "const unsigned* " << ClassName << "::getCalleeSaveRegs() const {\n" - << " static const unsigned CalleeSaveRegs[] = {\n "; - - const std::vector<Record*> &CSR = Target.getCalleeSavedRegisters(); - for (unsigned i = 0, e = CSR.size(); i != e; ++i) - OS << getQualifiedName(CSR[i]) << ", "; - OS << " 0\n };\n return CalleeSaveRegs;\n}\n\n"; -} |