//===- RegisterInfoEmitter.cpp - Generate a Register File Desc. -*- C++ -*-===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// 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 "CodeGenTarget.h"
+#include "CodeGenRegisters.h"
#include "Record.h"
-#include "Support/StringExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/STLExtras.h"
#include <set>
-
-static void EmitSourceHeader(const std::string &Desc, std::ostream &o) {
- o << "//===- TableGen'erated file -------------------------------------*-"
- " C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"
- "d file, do not edit!\n//\n//===------------------------------------"
- "----------------------------------===//\n\n";
-}
+using namespace llvm;
// 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!");
+ CodeGenTarget Target;
+ const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
- std::string Namespace = Registers[0]->getValueAsString("Namespace");
+ std::string Namespace = Registers[0].TheDef->getValueAsString("Namespace");
- EmitSourceHeader("Target Register Enum Values", OS);
+ EmitSourceFileHeader("Target Register Enum Values", OS);
+ OS << "namespace llvm {\n\n";
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 << " " << Registers[i].getName() << ", \t// " << i+1 << "\n";
+
OS << " };\n";
if (!Namespace.empty())
OS << "}\n";
-}
-
-static Record *getRegisterInfo(RecordKeeper &RC) {
- std::vector<Record*> RegisterInfos =
- Records.getAllDerivedDefinitions("RegisterInfo");
-
- if (RegisterInfos.size() != 1)
- throw std::string("ERROR: Multiple subclasses of RegisterInfo defined!");
- return RegisterInfos[0];
+ OS << "} // End llvm namespace \n";
}
void RegisterInfoEmitter::runHeader(std::ostream &OS) {
- EmitSourceHeader("Register Information Header Fragment", OS);
-
- std::string ClassName =
- getRegisterInfo(Records)->getValueAsString("ClassName");
+ EmitSourceFileHeader("Register Information Header Fragment", OS);
+ CodeGenTarget Target;
+ const std::string &TargetName = Target.getName();
+ std::string ClassName = TargetName + "GenRegisterInfo";
+
+ OS << "#include \"llvm/Target/MRegisterInfo.h\"\n";
+ OS << "#include <string>\n\n";
- OS << "#include \"llvm/Target/MRegisterInfo.h\"\n\n";
+ OS << "namespace llvm {\n\n";
OS << "struct " << ClassName << " : public MRegisterInfo {\n"
<< " " << ClassName
<< "(int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n"
<< " const unsigned* getCalleeSaveRegs() const;\n"
+ << " const TargetRegisterClass* const *getCalleeSaveRegClasses() const;\n"
+ << " int getDwarfRegNum(unsigned RegNum) const;\n"
<< "};\n\n";
-}
-static std::string getQualifiedName(Record *R) {
- std::string Namespace = R->getValueAsString("Namespace");
- if (Namespace.empty()) return R->getName();
- return Namespace + "::" + R->getName();
+ const std::vector<CodeGenRegisterClass> &RegisterClasses =
+ Target.getRegisterClasses();
+
+ if (!RegisterClasses.empty()) {
+ OS << "namespace " << RegisterClasses[0].Namespace
+ << " { // Register classes\n";
+ for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
+ const std::string &Name = RegisterClasses[i].getName();
+
+ // Output the register class definition.
+ OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
+ << " " << Name << "Class();\n"
+ << RegisterClasses[i].MethodProtos << " };\n";
+
+ // Output the extern for the instance.
+ OS << " extern " << Name << "Class\t" << Name << "RegClass;\n";
+ // Output the extern for the pointer to the instance (should remove).
+ OS << " static TargetRegisterClass * const "<< Name <<"RegisterClass = &"
+ << Name << "RegClass;\n";
+ }
+ OS << "} // end of namespace " << TargetName << "\n\n";
+ }
+ OS << "} // End llvm namespace \n";
}
// RegisterInfoEmitter::run - Main register file description emitter.
//
void RegisterInfoEmitter::run(std::ostream &OS) {
- EmitSourceHeader("Register Information Source Fragment", OS);
+ CodeGenTarget Target;
+ EmitSourceFileHeader("Register Information Source Fragment", OS);
+
+ OS << "namespace llvm {\n\n";
// 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");
- Record *RegisterClass = Records.getClass("Register");
-
- std::set<Record*> RegistersFound;
- std::vector<std::string> RegClassNames;
+ const std::vector<CodeGenRegisterClass> &RegisterClasses =
+ Target.getRegisterClasses();
// 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];
- std::string Name = RC->getName();
- if (Name[9] == '.') {
- static unsigned AnonCounter = 0;
- Name = "AnonRegClass_"+utostr(AnonCounter++);
- }
+ // RegClassesBelongedTo - Keep track of which register classes each reg
+ // belongs to.
+ std::multimap<Record*, const CodeGenRegisterClass*> RegClassesBelongedTo;
- RegClassNames.push_back(Name);
+ // Emit the register enum value arrays for each RegisterClass
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
- // Emit the register list now...
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName();
+
+ // 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) {
- Record *Reg = RegList->getElement(i);
- if (!Reg->isSubClassOf(RegisterClass))
- 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);
+ for (unsigned i = 0, e = RC.Elements.size(); i != e; ++i) {
+ Record *Reg = RC.Elements[i];
OS << getQualifiedName(Reg) << ", ";
+
+ // Keep track of which regclasses this register is in.
+ RegClassesBelongedTo.insert(std::make_pair(Reg, &RC));
}
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";
+ }
+
+ // Emit the ValueType arrays for each RegisterClass
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
- 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";
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName() + "VTs";
+
+ // Emit the register list now.
+ OS << " // " << Name
+ << " Register Class Value Types...\n const MVT::ValueType " << Name
+ << "[] = {\n ";
+ for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
+ OS << "MVT::" << RC.VTs[i] << ", ";
+ OS << "MVT::Other\n };\n\n";
+ }
+ OS << "} // end anonymous namespace\n\n";
+
+ // Now that all of the structs have been emitted, emit the instances.
+ if (!RegisterClasses.empty()) {
+ OS << "namespace " << RegisterClasses[0].Namespace
+ << " { // Register class instances\n";
+ for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
+ OS << " " << RegisterClasses[i].getName() << "Class\t"
+ << RegisterClasses[i].getName() << "RegClass;\n";
+
+ for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
+ const CodeGenRegisterClass &RC = RegisterClasses[i];
+ OS << RC.MethodBodies << "\n";
+ OS << RC.getName() << "Class::" << RC.getName()
+ << "Class() : TargetRegisterClass(" << RC.getName() + "VTs" << ", "
+ << RC.SpillSize/8 << ", "
+ << RC.SpillAlignment/8 << ", " << RC.getName() << ", "
+ << RC.getName() << " + " << RC.Elements.size() << ") {}\n";
+ }
+
+ OS << "}\n";
}
+ OS << "\nnamespace {\n";
OS << " const TargetRegisterClass* const RegisterClasses[] = {\n";
- for (unsigned i = 0, e = RegClassNames.size(); i != e; ++i)
- OS << " &" << RegClassNames[i] << "Instance,\n";
+ for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
+ OS << " &" << getQualifiedName(RegisterClasses[i].TheDef)
+ << "RegClass,\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");
+ const std::vector<CodeGenRegister> &Regs = Target.getRegisters();
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record *R = Regs[i].TheDef;
+ std::vector<Record*> LI = Regs[i].TheDef->getValueAsListOfDefs("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) {
- if (RegisterAliases[R].count(LI->getElement(j)))
+ for (unsigned j = 0, e = LI.size(); j != e; ++j) {
+ Record *Reg = LI[j];
+ if (RegisterAliases[R].count(Reg))
std::cerr << "Warning: register alias between " << getQualifiedName(R)
- << " and " << getQualifiedName(LI->getElement(j))
+ << " and " << getQualifiedName(Reg)
<< " specified multiple times!\n";
- RegisterAliases[R].insert(LI->getElement(j));
+ RegisterAliases[R].insert(Reg);
- if (RegisterAliases[LI->getElement(j)].count(R))
+ if (RegisterAliases[Reg].count(R))
std::cerr << "Warning: register alias between " << getQualifiedName(R)
- << " and " << getQualifiedName(LI->getElement(j))
+ << " and " << getQualifiedName(Reg)
<< " specified multiple times!\n";
- RegisterAliases[LI->getElement(j)].insert(R);
+ RegisterAliases[Reg].insert(R);
}
}
if (!RegisterAliases.empty())
OS << "\n\n // Register Alias Sets...\n";
-
+
+ // Emit the empty alias list
+ OS << " const unsigned Empty_AliasSet[] = { 0 };\n";
// Loop over all of the registers which have aliases, emitting the alias list
// to memory.
for (std::map<Record*, std::set<Record*> >::iterator
OS << "0 };\n";
}
- OS << "\n const MRegisterDesc RegisterDescriptors[] = { // Descriptors\n";
- OS << " { \"NOREG\",\t0,\t\t0,\t0 },\n";
+ OS<<"\n const TargetRegisterDesc RegisterDescriptors[] = { // Descriptors\n";
+ OS << " { \"NOREG\",\t0 },\n";
+
+
// Now that register alias sets have been emitted, emit the register
// descriptors now.
+ const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
- Record *Reg = Registers[i];
- OS << " { \"" << Reg->getName() << "\",\t";
- if (RegisterAliases.count(Reg))
- OS << Reg->getName() << "_AliasSet,\t";
+ const CodeGenRegister &Reg = Registers[i];
+ OS << " { \"";
+ if (!Reg.TheDef->getValueAsString("Name").empty())
+ OS << Reg.TheDef->getValueAsString("Name");
else
- OS << "0,\t\t";
- OS << "0, 0 },\n";
+ OS << Reg.getName();
+ OS << "\",\t";
+ if (RegisterAliases.count(Reg.TheDef))
+ OS << Reg.getName() << "_AliasSet },\n";
+ else
+ OS << "Empty_AliasSet },\n";
}
OS << " };\n"; // End of register descriptors...
OS << "}\n\n"; // End of anonymous namespace...
- Record *RegisterInfo = getRegisterInfo(Records);
- std::string ClassName = RegisterInfo->getValueAsString("ClassName");
-
+ 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 "
+ << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n "
<< " CallFrameSetupOpcode, CallFrameDestroyOpcode) {}\n\n";
-
- // Emit the getCalleeSaveRegs method...
+
+ // Emit the getCalleeSaveRegs method.
OS << "const unsigned* " << ClassName << "::getCalleeSaveRegs() const {\n"
<< " static const unsigned CalleeSaveRegs[] = {\n ";
- ListInit *LI = RegisterInfo->getValueAsListInit("CalleeSavedRegisters");
- for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
- OS << getQualifiedName(LI->getElement(i)) << ", ";
+ 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";
+
+ // Emit information about the callee saved register classes.
+ OS << "const TargetRegisterClass* const*\n" << ClassName
+ << "::getCalleeSaveRegClasses() const {\n"
+ << " static const TargetRegisterClass * const "
+ << "CalleeSaveRegClasses[] = {\n ";
+
+ for (unsigned i = 0, e = CSR.size(); i != e; ++i) {
+ Record *R = CSR[i];
+ std::multimap<Record*, const CodeGenRegisterClass*>::iterator I, E;
+ tie(I, E) = RegClassesBelongedTo.equal_range(R);
+ if (I == E)
+ throw "Callee saved register '" + R->getName() +
+ "' must belong to a register class for spilling.\n";
+ const CodeGenRegisterClass *RC = (I++)->second;
+ for (; I != E; ++I)
+ if (RC->SpillSize < I->second->SpillSize)
+ RC = I->second;
+ OS << "&" << getQualifiedName(RC->TheDef) << "RegClass, ";
+ }
+ OS << " 0\n };\n return CalleeSaveRegClasses;\n}\n\n";
+
+ // Emit information about the dwarf register numbers.
+ OS << "int " << ClassName << "::getDwarfRegNum(unsigned RegNum) const {\n";
+ OS << " static const int DwarfRegNums[] = { -1, // NoRegister";
+ for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
+ if (!(i % 16)) OS << "\n ";
+ const CodeGenRegister &Reg = Registers[i];
+ int DwarfRegNum = Reg.TheDef->getValueAsInt("DwarfNumber");
+ OS << DwarfRegNum;
+ if ((i + 1) != e) OS << ", ";
+ }
+ OS << "\n };\n";
+ OS << " assert(RegNum < (sizeof(DwarfRegNums)/sizeof(int)) &&\n";
+ OS << " \"RegNum exceeds number of registers\");\n";
+ OS << " return DwarfRegNums[RegNum];\n";
+ OS << "}\n\n";
+
+ OS << "} // End llvm namespace \n";
}
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