+++ /dev/null
-//===- 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";
-}
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