//===- RegisterInfoEmitter.cpp - Generate a Register File Desc. -*- C++ -*-===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file 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 "CodeGenWrappers.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 <algorithm>
#include <set>
+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!");
+void RegisterInfoEmitter::runEnums(raw_ostream &OS) {
+ CodeGenTarget Target;
+ const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
- std::string Namespace = Registers[0]->getValueAsString("Namespace");
+ std::string Namespace = Registers[0].TheDef->getValueAsString("Namespace");
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 << " NUM_TARGET_REGS \t// " << Registers.size()+1 << "\n";
OS << " };\n";
if (!Namespace.empty())
OS << "}\n";
+ OS << "} // End llvm namespace \n";
}
-void RegisterInfoEmitter::runHeader(std::ostream &OS) {
+void RegisterInfoEmitter::runHeader(raw_ostream &OS) {
EmitSourceFileHeader("Register Information Header Fragment", OS);
- const std::string &TargetName = CodeGenTarget().getName();
+ CodeGenTarget Target;
+ const std::string &TargetName = Target.getName();
std::string ClassName = TargetName + "GenRegisterInfo";
- OS << "#include \"llvm/Target/MRegisterInfo.h\"\n\n";
+ OS << "#include \"llvm/Target/TargetRegisterInfo.h\"\n";
+ OS << "#include <string>\n\n";
- OS << "struct " << ClassName << " : public MRegisterInfo {\n"
- << " " << ClassName
+ OS << "namespace llvm {\n\n";
+
+ OS << "struct " << ClassName << " : public TargetRegisterInfo {\n"
+ << " explicit " << ClassName
<< "(int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n"
- << " const unsigned* getCalleeSaveRegs() const;\n"
+ << " virtual int getDwarfRegNumFull(unsigned RegNum, "
+ << "unsigned Flavour) const;\n"
+ << " virtual int getDwarfRegNum(unsigned RegNum, bool isEH) const = 0;\n"
+ << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
+ << " { return false; }\n"
+ << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
<< "};\n\n";
- std::vector<Record*> RegisterClasses =
- Records.getAllDerivedDefinitions("RegisterClass");
+ const std::vector<CodeGenRegisterClass> &RegisterClasses =
+ Target.getRegisterClasses();
+
+ if (!RegisterClasses.empty()) {
+ OS << "namespace " << RegisterClasses[0].Namespace
+ << " { // Register classes\n";
+
+ OS << " enum {\n";
+ for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
+ if (i) OS << ",\n";
+ OS << " " << RegisterClasses[i].getName() << "RegClassID";
+ OS << " = " << (i+1);
+ }
+ OS << "\n };\n\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";
+}
+
+bool isSubRegisterClass(const CodeGenRegisterClass &RC,
+ std::set<Record*> &RegSet) {
+ for (unsigned i = 0, e = RC.Elements.size(); i != e; ++i) {
+ Record *Reg = RC.Elements[i];
+ if (!RegSet.count(Reg))
+ return false;
+ }
+ return true;
+}
- OS << "namespace " << TargetName << " { // Register classes\n";
- for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
- if (RegisterClasses[i]->getValueAsBit("isDummyClass"))
- continue; // Ignore dummies
+static void addSuperReg(Record *R, Record *S,
+ std::map<Record*, std::set<Record*>, LessRecord> &SubRegs,
+ std::map<Record*, std::set<Record*>, LessRecord> &SuperRegs,
+ std::map<Record*, std::set<Record*>, LessRecord> &Aliases) {
+ if (R == S) {
+ errs() << "Error: recursive sub-register relationship between"
+ << " register " << getQualifiedName(R)
+ << " and its sub-registers?\n";
+ abort();
+ }
+ if (!SuperRegs[R].insert(S).second)
+ return;
+ SubRegs[S].insert(R);
+ Aliases[R].insert(S);
+ Aliases[S].insert(R);
+ if (SuperRegs.count(S))
+ for (std::set<Record*>::iterator I = SuperRegs[S].begin(),
+ E = SuperRegs[S].end(); I != E; ++I)
+ addSuperReg(R, *I, SubRegs, SuperRegs, Aliases);
+}
- const std::string &Name = RegisterClasses[i]->getName();
- if (Name.size() < 9 || Name[9] != '.') // Ignore anonymous classes
- OS << " extern TargetRegisterClass *" << Name << "RegisterClass;\n";
+static void addSubSuperReg(Record *R, Record *S,
+ std::map<Record*, std::set<Record*>, LessRecord> &SubRegs,
+ std::map<Record*, std::set<Record*>, LessRecord> &SuperRegs,
+ std::map<Record*, std::set<Record*>, LessRecord> &Aliases) {
+ if (R == S) {
+ errs() << "Error: recursive sub-register relationship between"
+ << " register " << getQualifiedName(R)
+ << " and its sub-registers?\n";
+ abort();
}
- OS << "} // end of namespace " << TargetName << "\n\n";
+
+ if (!SubRegs[R].insert(S).second)
+ return;
+ addSuperReg(S, R, SubRegs, SuperRegs, Aliases);
+ Aliases[R].insert(S);
+ Aliases[S].insert(R);
+ if (SubRegs.count(S))
+ for (std::set<Record*>::iterator I = SubRegs[S].begin(),
+ E = SubRegs[S].end(); I != E; ++I)
+ addSubSuperReg(R, *I, SubRegs, SuperRegs, Aliases);
}
+class RegisterSorter {
+private:
+ std::map<Record*, std::set<Record*>, LessRecord> &RegisterSubRegs;
+
+public:
+ RegisterSorter(std::map<Record*, std::set<Record*>, LessRecord> &RS)
+ : RegisterSubRegs(RS) {};
+
+ bool operator()(Record *RegA, Record *RegB) {
+ // B is sub-register of A.
+ return RegisterSubRegs.count(RegA) && RegisterSubRegs[RegA].count(RegB);
+ }
+};
+
// RegisterInfoEmitter::run - Main register file description emitter.
//
-void RegisterInfoEmitter::run(std::ostream &OS) {
+void RegisterInfoEmitter::run(raw_ostream &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");
-
- 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];
- 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++);
- }
+ // 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...
- OS << " // " << Name << " Register Class...\n const unsigned " << Name
+ // 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"
+ << " static 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);
+ 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() + "'!";
+ // 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"
+ << " static const EVT " << Name
+ << "[] = {\n ";
+ for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
+ OS << getEnumName(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";
+
+ std::map<unsigned, std::set<unsigned> > SuperClassMap;
+ std::map<unsigned, std::set<unsigned> > SuperRegClassMap;
+ OS << "\n";
+
+ // Emit the sub-register classes for each RegisterClass
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
+
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName();
+
+ OS << " // " << Name
+ << " Sub-register Classes...\n"
+ << " static const TargetRegisterClass* const "
+ << Name << "SubRegClasses[] = {\n ";
+
+ bool Empty = true;
+
+ for (unsigned subrc = 0, subrcMax = RC.SubRegClasses.size();
+ subrc != subrcMax; ++subrc) {
+ unsigned rc2 = 0, e2 = RegisterClasses.size();
+ for (; rc2 != e2; ++rc2) {
+ const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
+ if (RC.SubRegClasses[subrc]->getName() == RC2.getName()) {
+ if (!Empty)
+ OS << ", ";
+ OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
+ Empty = false;
+
+ std::map<unsigned, std::set<unsigned> >::iterator SCMI =
+ SuperRegClassMap.find(rc2);
+ if (SCMI == SuperRegClassMap.end()) {
+ SuperRegClassMap.insert(std::make_pair(rc2,
+ std::set<unsigned>()));
+ SCMI = SuperRegClassMap.find(rc2);
+ }
+ SCMI->second.insert(rc);
+ break;
+ }
+ }
+ if (rc2 == e2)
+ throw "Register Class member '" +
+ RC.SubRegClasses[subrc]->getName() +
+ "' is not a valid RegisterClass!";
+ }
+
+ OS << (!Empty ? ", " : "") << "NULL";
+ OS << "\n };\n\n";
+ }
- OS << " } " << Name << "Instance;\n\n";
+ // Emit the super-register classes for each RegisterClass
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
+
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName();
+
+ OS << " // " << Name
+ << " Super-register Classes...\n"
+ << " static const TargetRegisterClass* const "
+ << Name << "SuperRegClasses[] = {\n ";
+
+ bool Empty = true;
+ std::map<unsigned, std::set<unsigned> >::iterator I =
+ SuperRegClassMap.find(rc);
+ if (I != SuperRegClassMap.end()) {
+ for (std::set<unsigned>::iterator II = I->second.begin(),
+ EE = I->second.end(); II != EE; ++II) {
+ const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
+ if (!Empty)
+ OS << ", ";
+ OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
+ Empty = false;
+ }
+ }
+
+ OS << (!Empty ? ", " : "") << "NULL";
+ OS << "\n };\n\n";
+ }
+
+ // Emit the sub-classes array for each RegisterClass
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
+
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName();
+
+ std::set<Record*> RegSet;
+ for (unsigned i = 0, e = RC.Elements.size(); i != e; ++i) {
+ Record *Reg = RC.Elements[i];
+ RegSet.insert(Reg);
+ }
+
+ OS << " // " << Name
+ << " Register Class sub-classes...\n"
+ << " static const TargetRegisterClass* const "
+ << Name << "Subclasses[] = {\n ";
+
+ bool Empty = true;
+ for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
+ const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
+
+ // RC2 is a sub-class of RC if it is a valid replacement for any
+ // instruction operand where an RC register is required. It must satisfy
+ // these conditions:
+ //
+ // 1. All RC2 registers are also in RC.
+ // 2. The RC2 spill size must not be smaller that the RC spill size.
+ // 3. RC2 spill alignment must be compatible with RC.
+ //
+ // Sub-classes are used to determine if a virtual register can be used
+ // as an instruction operand, or if it must be copied first.
+
+ if (rc == rc2 || RC2.Elements.size() > RC.Elements.size() ||
+ (RC.SpillAlignment && RC2.SpillAlignment % RC.SpillAlignment) ||
+ RC.SpillSize > RC2.SpillSize || !isSubRegisterClass(RC2, RegSet))
+ continue;
+
+ if (!Empty) OS << ", ";
+ OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
+ Empty = false;
+
+ std::map<unsigned, std::set<unsigned> >::iterator SCMI =
+ SuperClassMap.find(rc2);
+ if (SCMI == SuperClassMap.end()) {
+ SuperClassMap.insert(std::make_pair(rc2, std::set<unsigned>()));
+ SCMI = SuperClassMap.find(rc2);
+ }
+ SCMI->second.insert(rc);
+ }
+
+ OS << (!Empty ? ", " : "") << "NULL";
+ OS << "\n };\n\n";
+ }
+
+ for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
+ const CodeGenRegisterClass &RC = RegisterClasses[rc];
+
+ // Give the register class a legal C name if it's anonymous.
+ std::string Name = RC.TheDef->getName();
+
+ OS << " // " << Name
+ << " Register Class super-classes...\n"
+ << " static const TargetRegisterClass* const "
+ << Name << "Superclasses[] = {\n ";
+
+ bool Empty = true;
+ std::map<unsigned, std::set<unsigned> >::iterator I =
+ SuperClassMap.find(rc);
+ if (I != SuperClassMap.end()) {
+ for (std::set<unsigned>::iterator II = I->second.begin(),
+ EE = I->second.end(); II != EE; ++II) {
+ const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
+ if (!Empty) OS << ", ";
+ OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
+ Empty = false;
+ }
+ }
+
+ OS << (!Empty ? ", " : "") << "NULL";
+ OS << "\n };\n\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() + "RegClassID" << ", "
+ << '\"' << RC.getName() << "\", "
+ << RC.getName() + "VTs" << ", "
+ << RC.getName() + "Subclasses" << ", "
+ << RC.getName() + "Superclasses" << ", "
+ << RC.getName() + "SubRegClasses" << ", "
+ << RC.getName() + "SuperRegClasses" << ", "
+ << RC.SpillSize/8 << ", "
+ << RC.SpillAlignment/8 << ", "
+ << RC.CopyCost << ", "
+ << 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");
+ // Emit register sub-registers / super-registers, aliases...
+ std::map<Record*, std::set<Record*>, LessRecord> RegisterSubRegs;
+ std::map<Record*, std::set<Record*>, LessRecord> RegisterSuperRegs;
+ std::map<Record*, std::set<Record*>, LessRecord> RegisterAliases;
+ std::map<Record*, std::vector<std::pair<int, Record*> > > SubRegVectors;
+ typedef std::map<Record*, std::vector<int64_t>, LessRecord> DwarfRegNumsMapTy;
+ DwarfRegNumsMapTy DwarfRegNums;
+
+ 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) {
- 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());
+ for (unsigned j = 0, e = LI.size(); j != e; ++j) {
+ Record *Reg = LI[j];
+ if (RegisterAliases[R].count(Reg))
+ errs() << "Warning: register alias between " << getQualifiedName(R)
+ << " and " << getQualifiedName(Reg)
+ << " specified multiple times!\n";
+ RegisterAliases[R].insert(Reg);
+
+ if (RegisterAliases[Reg].count(R))
+ errs() << "Warning: register alias between " << getQualifiedName(R)
+ << " and " << getQualifiedName(Reg)
+ << " specified multiple times!\n";
+ RegisterAliases[Reg].insert(R);
+ }
+ }
+
+ // Process sub-register sets.
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record *R = Regs[i].TheDef;
+ std::vector<Record*> LI = Regs[i].TheDef->getValueAsListOfDefs("SubRegs");
+ // Process sub-register set and add aliases information.
+ for (unsigned j = 0, e = LI.size(); j != e; ++j) {
+ Record *SubReg = LI[j];
+ if (RegisterSubRegs[R].count(SubReg))
+ errs() << "Warning: register " << getQualifiedName(SubReg)
+ << " specified as a sub-register of " << getQualifiedName(R)
+ << " multiple times!\n";
+ addSubSuperReg(R, SubReg, RegisterSubRegs, RegisterSuperRegs,
+ RegisterAliases);
+ }
+ }
+
+ // Print the SubregHashTable, a simple quadratically probed
+ // hash table for determining if a register is a subregister
+ // of another register.
+ unsigned NumSubRegs = 0;
+ std::map<Record*, unsigned> RegNo;
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ RegNo[Regs[i].TheDef] = i;
+ NumSubRegs += RegisterSubRegs[Regs[i].TheDef].size();
+ }
+
+ unsigned SubregHashTableSize = 2 * NextPowerOf2(2 * NumSubRegs);
+ unsigned* SubregHashTable = new unsigned[2 * SubregHashTableSize];
+ std::fill(SubregHashTable, SubregHashTable + 2 * SubregHashTableSize, ~0U);
+
+ unsigned hashMisses = 0;
+
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record* R = Regs[i].TheDef;
+ for (std::set<Record*>::iterator I = RegisterSubRegs[R].begin(),
+ E = RegisterSubRegs[R].end(); I != E; ++I) {
+ Record* RJ = *I;
+ // We have to increase the indices of both registers by one when
+ // computing the hash because, in the generated code, there
+ // will be an extra empty slot at register 0.
+ size_t index = ((i+1) + (RegNo[RJ]+1) * 37) & (SubregHashTableSize-1);
+ unsigned ProbeAmt = 2;
+ while (SubregHashTable[index*2] != ~0U &&
+ SubregHashTable[index*2+1] != ~0U) {
+ index = (index + ProbeAmt) & (SubregHashTableSize-1);
+ ProbeAmt += 2;
+
+ hashMisses++;
+ }
+
+ SubregHashTable[index*2] = i;
+ SubregHashTable[index*2+1] = RegNo[RJ];
+ }
+ }
+
+ OS << "\n\n // Number of hash collisions: " << hashMisses << "\n";
+
+ if (SubregHashTableSize) {
+ std::string Namespace = Regs[0].TheDef->getValueAsString("Namespace");
+
+ OS << " const unsigned SubregHashTable[] = { ";
+ for (unsigned i = 0; i < SubregHashTableSize - 1; ++i) {
+ if (i != 0)
+ // Insert spaces for nice formatting.
+ OS << " ";
+
+ if (SubregHashTable[2*i] != ~0U) {
+ OS << getQualifiedName(Regs[SubregHashTable[2*i]].TheDef) << ", "
+ << getQualifiedName(Regs[SubregHashTable[2*i+1]].TheDef) << ", \n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister, \n";
+ }
+ }
+
+ unsigned Idx = SubregHashTableSize*2-2;
+ if (SubregHashTable[Idx] != ~0U) {
+ OS << " "
+ << getQualifiedName(Regs[SubregHashTable[Idx]].TheDef) << ", "
+ << getQualifiedName(Regs[SubregHashTable[Idx+1]].TheDef) << " };\n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister };\n";
+ }
+
+ OS << " const unsigned SubregHashTableSize = "
+ << SubregHashTableSize << ";\n";
+ } else {
+ OS << " const unsigned SubregHashTable[] = { ~0U, ~0U };\n"
+ << " const unsigned SubregHashTableSize = 1;\n";
+ }
+
+ delete [] SubregHashTable;
+
+
+ // Print the SuperregHashTable, a simple quadratically probed
+ // hash table for determining if a register is a super-register
+ // of another register.
+ unsigned NumSupRegs = 0;
+ RegNo.clear();
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ RegNo[Regs[i].TheDef] = i;
+ NumSupRegs += RegisterSuperRegs[Regs[i].TheDef].size();
+ }
+
+ unsigned SuperregHashTableSize = 2 * NextPowerOf2(2 * NumSupRegs);
+ unsigned* SuperregHashTable = new unsigned[2 * SuperregHashTableSize];
+ std::fill(SuperregHashTable, SuperregHashTable + 2 * SuperregHashTableSize, ~0U);
+
+ hashMisses = 0;
+
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record* R = Regs[i].TheDef;
+ for (std::set<Record*>::iterator I = RegisterSuperRegs[R].begin(),
+ E = RegisterSuperRegs[R].end(); I != E; ++I) {
+ Record* RJ = *I;
+ // We have to increase the indices of both registers by one when
+ // computing the hash because, in the generated code, there
+ // will be an extra empty slot at register 0.
+ size_t index = ((i+1) + (RegNo[RJ]+1) * 37) & (SuperregHashTableSize-1);
+ unsigned ProbeAmt = 2;
+ while (SuperregHashTable[index*2] != ~0U &&
+ SuperregHashTable[index*2+1] != ~0U) {
+ index = (index + ProbeAmt) & (SuperregHashTableSize-1);
+ ProbeAmt += 2;
+
+ hashMisses++;
+ }
+
+ SuperregHashTable[index*2] = i;
+ SuperregHashTable[index*2+1] = RegNo[RJ];
+ }
+ }
+
+ OS << "\n\n // Number of hash collisions: " << hashMisses << "\n";
+
+ if (SuperregHashTableSize) {
+ std::string Namespace = Regs[0].TheDef->getValueAsString("Namespace");
+
+ OS << " const unsigned SuperregHashTable[] = { ";
+ for (unsigned i = 0; i < SuperregHashTableSize - 1; ++i) {
+ if (i != 0)
+ // Insert spaces for nice formatting.
+ OS << " ";
+
+ if (SuperregHashTable[2*i] != ~0U) {
+ OS << getQualifiedName(Regs[SuperregHashTable[2*i]].TheDef) << ", "
+ << getQualifiedName(Regs[SuperregHashTable[2*i+1]].TheDef) << ", \n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister, \n";
+ }
+ }
+
+ unsigned Idx = SuperregHashTableSize*2-2;
+ if (SuperregHashTable[Idx] != ~0U) {
+ OS << " "
+ << getQualifiedName(Regs[SuperregHashTable[Idx]].TheDef) << ", "
+ << getQualifiedName(Regs[SuperregHashTable[Idx+1]].TheDef) << " };\n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister };\n";
+ }
+
+ OS << " const unsigned SuperregHashTableSize = "
+ << SuperregHashTableSize << ";\n";
+ } else {
+ OS << " const unsigned SuperregHashTable[] = { ~0U, ~0U };\n"
+ << " const unsigned SuperregHashTableSize = 1;\n";
+ }
+
+ delete [] SuperregHashTable;
+
- 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);
+ // Print the AliasHashTable, a simple quadratically probed
+ // hash table for determining if a register aliases another register.
+ unsigned NumAliases = 0;
+ RegNo.clear();
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ RegNo[Regs[i].TheDef] = i;
+ NumAliases += RegisterAliases[Regs[i].TheDef].size();
+ }
+
+ unsigned AliasesHashTableSize = 2 * NextPowerOf2(2 * NumAliases);
+ unsigned* AliasesHashTable = new unsigned[2 * AliasesHashTableSize];
+ std::fill(AliasesHashTable, AliasesHashTable + 2 * AliasesHashTableSize, ~0U);
+
+ hashMisses = 0;
+
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record* R = Regs[i].TheDef;
+ for (std::set<Record*>::iterator I = RegisterAliases[R].begin(),
+ E = RegisterAliases[R].end(); I != E; ++I) {
+ Record* RJ = *I;
+ // We have to increase the indices of both registers by one when
+ // computing the hash because, in the generated code, there
+ // will be an extra empty slot at register 0.
+ size_t index = ((i+1) + (RegNo[RJ]+1) * 37) & (AliasesHashTableSize-1);
+ unsigned ProbeAmt = 2;
+ while (AliasesHashTable[index*2] != ~0U &&
+ AliasesHashTable[index*2+1] != ~0U) {
+ index = (index + ProbeAmt) & (AliasesHashTableSize-1);
+ ProbeAmt += 2;
+
+ hashMisses++;
+ }
+
+ AliasesHashTable[index*2] = i;
+ AliasesHashTable[index*2+1] = RegNo[RJ];
}
}
+
+ OS << "\n\n // Number of hash collisions: " << hashMisses << "\n";
+
+ if (AliasesHashTableSize) {
+ std::string Namespace = Regs[0].TheDef->getValueAsString("Namespace");
+
+ OS << " const unsigned AliasesHashTable[] = { ";
+ for (unsigned i = 0; i < AliasesHashTableSize - 1; ++i) {
+ if (i != 0)
+ // Insert spaces for nice formatting.
+ OS << " ";
+
+ if (AliasesHashTable[2*i] != ~0U) {
+ OS << getQualifiedName(Regs[AliasesHashTable[2*i]].TheDef) << ", "
+ << getQualifiedName(Regs[AliasesHashTable[2*i+1]].TheDef) << ", \n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister, \n";
+ }
+ }
+
+ unsigned Idx = AliasesHashTableSize*2-2;
+ if (AliasesHashTable[Idx] != ~0U) {
+ OS << " "
+ << getQualifiedName(Regs[AliasesHashTable[Idx]].TheDef) << ", "
+ << getQualifiedName(Regs[AliasesHashTable[Idx+1]].TheDef) << " };\n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister };\n";
+ }
+
+ OS << " const unsigned AliasesHashTableSize = "
+ << AliasesHashTableSize << ";\n";
+ } else {
+ OS << " const unsigned AliasesHashTable[] = { ~0U, ~0U };\n"
+ << " const unsigned AliasesHashTableSize = 1;\n";
+ }
+
+ delete [] AliasesHashTable;
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
+ for (std::map<Record*, std::set<Record*>, LessRecord >::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(),
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.
+ if (!RegisterSubRegs.empty())
+ OS << "\n\n // Register Sub-registers Sets...\n";
+
+ // Emit the empty sub-registers list
+ OS << " const unsigned Empty_SubRegsSet[] = { 0 };\n";
+ // Loop over all of the registers which have sub-registers, emitting the
+ // sub-registers list to memory.
+ for (std::map<Record*, std::set<Record*>, LessRecord>::iterator
+ I = RegisterSubRegs.begin(), E = RegisterSubRegs.end(); I != E; ++I) {
+ OS << " const unsigned " << I->first->getName() << "_SubRegsSet[] = { ";
+ std::vector<Record*> SubRegsVector;
+ for (std::set<Record*>::iterator ASI = I->second.begin(),
+ E = I->second.end(); ASI != E; ++ASI)
+ SubRegsVector.push_back(*ASI);
+ RegisterSorter RS(RegisterSubRegs);
+ std::stable_sort(SubRegsVector.begin(), SubRegsVector.end(), RS);
+ for (unsigned i = 0, e = SubRegsVector.size(); i != e; ++i)
+ OS << getQualifiedName(SubRegsVector[i]) << ", ";
+ OS << "0 };\n";
+ }
+
+ if (!RegisterSuperRegs.empty())
+ OS << "\n\n // Register Super-registers Sets...\n";
+
+ // Emit the empty super-registers list
+ OS << " const unsigned Empty_SuperRegsSet[] = { 0 };\n";
+ // Loop over all of the registers which have super-registers, emitting the
+ // super-registers list to memory.
+ for (std::map<Record*, std::set<Record*>, LessRecord >::iterator
+ I = RegisterSuperRegs.begin(), E = RegisterSuperRegs.end(); I != E; ++I) {
+ OS << " const unsigned " << I->first->getName() << "_SuperRegsSet[] = { ";
+
+ std::vector<Record*> SuperRegsVector;
+ for (std::set<Record*>::iterator ASI = I->second.begin(),
+ E = I->second.end(); ASI != E; ++ASI)
+ SuperRegsVector.push_back(*ASI);
+ RegisterSorter RS(RegisterSubRegs);
+ std::stable_sort(SuperRegsVector.begin(), SuperRegsVector.end(), RS);
+ for (unsigned i = 0, e = SuperRegsVector.size(); i != e; ++i)
+ OS << getQualifiedName(SuperRegsVector[i]) << ", ";
+ OS << "0 };\n";
+ }
+
+ OS<<"\n const TargetRegisterDesc RegisterDescriptors[] = { // Descriptors\n";
+ OS << " { \"NOREG\",\t\"NOREG\",\t0,\t0,\t0 },\n";
+
+ // Now that register alias and sub-registers 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];
+ const CodeGenRegister &Reg = Registers[i];
OS << " { \"";
- if (!Reg->getValueAsString("Name").empty())
- OS << Reg->getValueAsString("Name");
+ if (!Reg.TheDef->getValueAsString("AsmName").empty())
+ OS << Reg.TheDef->getValueAsString("AsmName");
else
- OS << Reg->getName();
- OS << "\",\t";
- if (RegisterAliases.count(Reg))
- OS << Reg->getName() << "_AliasSet,\t";
+ OS << Reg.getName();
+ OS << "\",\t\"";
+ OS << Reg.getName() << "\",\t";
+ if (RegisterAliases.count(Reg.TheDef))
+ OS << Reg.getName() << "_AliasSet,\t";
else
OS << "Empty_AliasSet,\t";
- OS << "0, 0 },\n";
+ if (RegisterSubRegs.count(Reg.TheDef))
+ OS << Reg.getName() << "_SubRegsSet,\t";
+ else
+ OS << "Empty_SubRegsSet,\t";
+ if (RegisterSuperRegs.count(Reg.TheDef))
+ OS << Reg.getName() << "_SuperRegsSet },\n";
+ else
+ OS << "Empty_SuperRegsSet },\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
+ std::string ClassName = Target.getName() + "GenRegisterInfo";
- const std::string &Name = RegisterClasses[i]->getName();
- if (Name.size() < 9 || Name[9] != '.') // Ignore anonymous classes
- OS << " TargetRegisterClass *" << Name << "RegisterClass = &"
- << Name << "Instance;\n";
+ // Calculate the mapping of subregister+index pairs to physical registers.
+ std::vector<Record*> SubRegs = Records.getAllDerivedDefinitions("SubRegSet");
+ for (unsigned i = 0, e = SubRegs.size(); i != e; ++i) {
+ int subRegIndex = SubRegs[i]->getValueAsInt("index");
+ std::vector<Record*> From = SubRegs[i]->getValueAsListOfDefs("From");
+ std::vector<Record*> To = SubRegs[i]->getValueAsListOfDefs("To");
+
+ if (From.size() != To.size()) {
+ errs() << "Error: register list and sub-register list not of equal length"
+ << " in SubRegSet\n";
+ exit(1);
+ }
+
+ // For each entry in from/to vectors, insert the to register at index
+ for (unsigned ii = 0, ee = From.size(); ii != ee; ++ii)
+ SubRegVectors[From[ii]].push_back(std::make_pair(subRegIndex, To[ii]));
}
- OS << "} // end of namespace " << Target.getName() << "\n\n";
-
-
-
- std::string ClassName = Target.getName() + "GenRegisterInfo";
+
+ // Emit the subregister + index mapping function based on the information
+ // calculated above.
+ OS << "unsigned " << ClassName
+ << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
+ << " switch (RegNo) {\n"
+ << " default:\n return 0;\n";
+ for (std::map<Record*, std::vector<std::pair<int, Record*> > >::iterator
+ I = SubRegVectors.begin(), E = SubRegVectors.end(); I != E; ++I) {
+ OS << " case " << getQualifiedName(I->first) << ":\n";
+ OS << " switch (Index) {\n";
+ OS << " default: return 0;\n";
+ for (unsigned i = 0, e = I->second.size(); i != e; ++i)
+ OS << " case " << (I->second)[i].first << ": return "
+ << getQualifiedName((I->second)[i].second) << ";\n";
+ OS << " };\n" << " break;\n";
+ }
+ OS << " };\n";
+ OS << " return 0;\n";
+ OS << "}\n\n";
// 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";
+ << " : TargetRegisterInfo(RegisterDescriptors, " << Registers.size()+1
+ << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n "
+ << " CallFrameSetupOpcode, CallFrameDestroyOpcode,\n"
+ << " SubregHashTable, SubregHashTableSize,\n"
+ << " SuperregHashTable, SuperregHashTableSize,\n"
+ << " AliasesHashTable, AliasesHashTableSize) {\n"
+ << "}\n\n";
+
+ // Collect all information about dwarf register numbers
+
+ // First, just pull all provided information to the map
+ unsigned maxLength = 0;
+ for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
+ Record *Reg = Registers[i].TheDef;
+ std::vector<int64_t> RegNums = Reg->getValueAsListOfInts("DwarfNumbers");
+ maxLength = std::max((size_t)maxLength, RegNums.size());
+ if (DwarfRegNums.count(Reg))
+ errs() << "Warning: DWARF numbers for register " << getQualifiedName(Reg)
+ << "specified multiple times\n";
+ DwarfRegNums[Reg] = RegNums;
+ }
+
+ // Now we know maximal length of number list. Append -1's, where needed
+ for (DwarfRegNumsMapTy::iterator
+ I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I)
+ for (unsigned i = I->second.size(), e = maxLength; i != e; ++i)
+ I->second.push_back(-1);
+
+ // Emit information about the dwarf register numbers.
+ OS << "int " << ClassName << "::getDwarfRegNumFull(unsigned RegNum, "
+ << "unsigned Flavour) const {\n"
+ << " switch (Flavour) {\n"
+ << " default:\n"
+ << " assert(0 && \"Unknown DWARF flavour\");\n"
+ << " return -1;\n";
+
+ for (unsigned i = 0, e = maxLength; i != e; ++i) {
+ OS << " case " << i << ":\n"
+ << " switch (RegNum) {\n"
+ << " default:\n"
+ << " assert(0 && \"Invalid RegNum\");\n"
+ << " return -1;\n";
+
+ // Sort by name to get a stable order.
+
+
+ for (DwarfRegNumsMapTy::iterator
+ I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
+ int RegNo = I->second[i];
+ if (RegNo != -2)
+ OS << " case " << getQualifiedName(I->first) << ":\n"
+ << " return " << RegNo << ";\n";
+ else
+ OS << " case " << getQualifiedName(I->first) << ":\n"
+ << " assert(0 && \"Invalid register for this mode\");\n"
+ << " return -1;\n";
+ }
+ OS << " };\n";
+ }
+
+ OS << " };\n}\n\n";
+
+ OS << "} // End llvm namespace \n";
}