1 //===- RegisterInfoEmitter.cpp - Generate a Register File Desc. -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend is responsible for emitting a description of a target
11 // register file for a code generator. It uses instances of the Register,
12 // RegisterAliases, and RegisterClass classes to gather this information.
14 //===----------------------------------------------------------------------===//
16 #include "RegisterInfoEmitter.h"
17 #include "CodeGenTarget.h"
18 #include "CodeGenRegisters.h"
20 #include "llvm/ADT/StringExtras.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/Support/Format.h"
27 // runEnums - Print out enum values for all of the registers.
29 RegisterInfoEmitter::runEnums(raw_ostream &OS,
30 CodeGenTarget &Target, CodeGenRegBank &Bank) {
31 const std::vector<CodeGenRegister*> &Registers = Bank.getRegisters();
33 std::string Namespace = Registers[0]->TheDef->getValueAsString("Namespace");
35 EmitSourceFileHeader("Target Register Enum Values", OS);
37 OS << "\n#ifdef GET_REGINFO_ENUM\n";
38 OS << "#undef GET_REGINFO_ENUM\n";
40 OS << "namespace llvm {\n\n";
42 if (!Namespace.empty())
43 OS << "namespace " << Namespace << " {\n";
44 OS << "enum {\n NoRegister,\n";
46 for (unsigned i = 0, e = Registers.size(); i != e; ++i)
47 OS << " " << Registers[i]->getName() << " = " <<
48 Registers[i]->EnumValue << ",\n";
49 assert(Registers.size() == Registers[Registers.size()-1]->EnumValue &&
50 "Register enum value mismatch!");
51 OS << " NUM_TARGET_REGS \t// " << Registers.size()+1 << "\n";
53 if (!Namespace.empty())
56 const std::vector<CodeGenRegisterClass> &RegisterClasses =
57 Target.getRegisterClasses();
58 if (!RegisterClasses.empty()) {
59 OS << "\n// Register classes\n";
60 if (!Namespace.empty())
61 OS << "namespace " << Namespace << " {\n";
63 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
65 OS << " " << RegisterClasses[i].getName() << "RegClassID";
69 if (!Namespace.empty())
73 const std::vector<Record*> RegAltNameIndices = Target.getRegAltNameIndices();
74 // If the only definition is the default NoRegAltName, we don't need to
76 if (RegAltNameIndices.size() > 1) {
77 OS << "\n// Register alternate name indices\n";
78 if (!Namespace.empty())
79 OS << "namespace " << Namespace << " {\n";
81 for (unsigned i = 0, e = RegAltNameIndices.size(); i != e; ++i)
82 OS << " " << RegAltNameIndices[i]->getName() << ",\t// " << i << "\n";
83 OS << " NUM_TARGET_REG_ALT_NAMES = " << RegAltNameIndices.size() << "\n";
85 if (!Namespace.empty())
90 OS << "} // End llvm namespace \n";
91 OS << "#endif // GET_REGINFO_ENUM\n\n";
95 RegisterInfoEmitter::EmitRegMapping(raw_ostream &OS,
96 const std::vector<CodeGenRegister*> &Regs,
99 // Collect all information about dwarf register numbers
100 typedef std::map<Record*, std::vector<int64_t>, LessRecord> DwarfRegNumsMapTy;
101 DwarfRegNumsMapTy DwarfRegNums;
103 // First, just pull all provided information to the map
104 unsigned maxLength = 0;
105 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
106 Record *Reg = Regs[i]->TheDef;
107 std::vector<int64_t> RegNums = Reg->getValueAsListOfInts("DwarfNumbers");
108 maxLength = std::max((size_t)maxLength, RegNums.size());
109 if (DwarfRegNums.count(Reg))
110 errs() << "Warning: DWARF numbers for register " << getQualifiedName(Reg)
111 << "specified multiple times\n";
112 DwarfRegNums[Reg] = RegNums;
118 // Now we know maximal length of number list. Append -1's, where needed
119 for (DwarfRegNumsMapTy::iterator
120 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I)
121 for (unsigned i = I->second.size(), e = maxLength; i != e; ++i)
122 I->second.push_back(-1);
124 // Emit reverse information about the dwarf register numbers.
125 for (unsigned j = 0; j < 2; ++j) {
128 OS << "DwarfFlavour";
133 << " assert(0 && \"Unknown DWARF flavour\");\n"
136 for (unsigned i = 0, e = maxLength; i != e; ++i) {
137 OS << " case " << i << ":\n";
138 for (DwarfRegNumsMapTy::iterator
139 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
140 int DwarfRegNo = I->second[i];
146 OS << "mapDwarfRegToLLVMReg(" << DwarfRegNo << ", "
147 << getQualifiedName(I->first) << ", ";
159 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
160 Record *Reg = Regs[i]->TheDef;
161 const RecordVal *V = Reg->getValue("DwarfAlias");
162 if (!V || !V->getValue())
165 DefInit *DI = dynamic_cast<DefInit*>(V->getValue());
166 Record *Alias = DI->getDef();
167 DwarfRegNums[Reg] = DwarfRegNums[Alias];
170 // Emit information about the dwarf register numbers.
171 for (unsigned j = 0; j < 2; ++j) {
174 OS << "DwarfFlavour";
179 << " assert(0 && \"Unknown DWARF flavour\");\n"
182 for (unsigned i = 0, e = maxLength; i != e; ++i) {
183 OS << " case " << i << ":\n";
184 // Sort by name to get a stable order.
185 for (DwarfRegNumsMapTy::iterator
186 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
187 int RegNo = I->second[i];
191 OS << "mapLLVMRegToDwarfReg(" << getQualifiedName(I->first) << ", "
206 // runMCDesc - Print out MC register descriptions.
209 RegisterInfoEmitter::runMCDesc(raw_ostream &OS, CodeGenTarget &Target,
210 CodeGenRegBank &RegBank) {
211 EmitSourceFileHeader("MC Register Information", OS);
213 OS << "\n#ifdef GET_REGINFO_MC_DESC\n";
214 OS << "#undef GET_REGINFO_MC_DESC\n";
216 std::map<const CodeGenRegister*, CodeGenRegister::Set> Overlaps;
217 RegBank.computeOverlaps(Overlaps);
219 OS << "namespace llvm {\n\n";
221 const std::string &TargetName = Target.getName();
222 std::string ClassName = TargetName + "GenMCRegisterInfo";
223 OS << "struct " << ClassName << " : public MCRegisterInfo {\n"
224 << " explicit " << ClassName << "(const MCRegisterDesc *D);\n";
227 OS << "\nnamespace {\n";
229 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
231 // Emit an overlap list for all registers.
232 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
233 const CodeGenRegister *Reg = Regs[i];
234 const CodeGenRegister::Set &O = Overlaps[Reg];
235 // Move Reg to the front so TRI::getAliasSet can share the list.
236 OS << " const unsigned " << Reg->getName() << "_Overlaps[] = { "
237 << getQualifiedName(Reg->TheDef) << ", ";
238 for (CodeGenRegister::Set::const_iterator I = O.begin(), E = O.end();
241 OS << getQualifiedName((*I)->TheDef) << ", ";
245 // Emit the empty sub-registers list
246 OS << " const unsigned Empty_SubRegsSet[] = { 0 };\n";
247 // Loop over all of the registers which have sub-registers, emitting the
248 // sub-registers list to memory.
249 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
250 const CodeGenRegister &Reg = *Regs[i];
251 if (Reg.getSubRegs().empty())
253 // getSubRegs() orders by SubRegIndex. We want a topological order.
254 SetVector<CodeGenRegister*> SR;
255 Reg.addSubRegsPreOrder(SR);
256 OS << " const unsigned " << Reg.getName() << "_SubRegsSet[] = { ";
257 for (unsigned j = 0, je = SR.size(); j != je; ++j)
258 OS << getQualifiedName(SR[j]->TheDef) << ", ";
262 // Emit the empty super-registers list
263 OS << " const unsigned Empty_SuperRegsSet[] = { 0 };\n";
264 // Loop over all of the registers which have super-registers, emitting the
265 // super-registers list to memory.
266 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
267 const CodeGenRegister &Reg = *Regs[i];
268 const CodeGenRegister::SuperRegList &SR = Reg.getSuperRegs();
271 OS << " const unsigned " << Reg.getName() << "_SuperRegsSet[] = { ";
272 for (unsigned j = 0, je = SR.size(); j != je; ++j)
273 OS << getQualifiedName(SR[j]->TheDef) << ", ";
276 OS << "}\n"; // End of anonymous namespace...
278 OS << "\nMCRegisterDesc " << TargetName
279 << "RegDesc[] = { // Descriptors\n";
280 OS << " { \"NOREG\",\t0,\t0,\t0 },\n";
282 // Now that register alias and sub-registers sets have been emitted, emit the
283 // register descriptors now.
284 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
285 const CodeGenRegister &Reg = *Regs[i];
287 OS << Reg.getName() << "\",\t" << Reg.getName() << "_Overlaps,\t";
288 if (!Reg.getSubRegs().empty())
289 OS << Reg.getName() << "_SubRegsSet,\t";
291 OS << "Empty_SubRegsSet,\t";
292 if (!Reg.getSuperRegs().empty())
293 OS << Reg.getName() << "_SuperRegsSet";
295 OS << "Empty_SuperRegsSet";
298 OS << "};\n\n"; // End of register descriptors...
300 // FIXME: This code is duplicated in the TargetRegisterClass emitter.
301 const std::vector<CodeGenRegisterClass> &RegisterClasses =
302 Target.getRegisterClasses();
304 // Loop over all of the register classes... emitting each one.
305 OS << "namespace { // Register classes...\n";
307 // Emit the register enum value arrays for each RegisterClass
308 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
309 const CodeGenRegisterClass &RC = RegisterClasses[rc];
310 ArrayRef<Record*> Order = RC.getOrder();
312 // Give the register class a legal C name if it's anonymous.
313 std::string Name = RC.getName();
315 // Emit the register list now.
316 OS << " // " << Name << " Register Class...\n"
317 << " static const unsigned " << Name
319 for (unsigned i = 0, e = Order.size(); i != e; ++i) {
320 Record *Reg = Order[i];
321 OS << getQualifiedName(Reg) << ", ";
327 OS << "MCRegisterClass " << TargetName << "MCRegisterClasses[] = {\n";
329 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
330 const CodeGenRegisterClass &RC = RegisterClasses[rc];
331 OS << " MCRegisterClass("
333 << '\"' << RC.getName() << "\", "
334 << RC.SpillSize/8 << ", "
335 << RC.SpillAlignment/8 << ", "
336 << RC.CopyCost << ", "
337 << RC.Allocatable << ", "
338 << RC.getName() << ", " << RC.getName() << " + "
339 << RC.getOrder().size()
345 // MCRegisterInfo initialization routine.
346 OS << "static inline void Init" << TargetName
347 << "MCRegisterInfo(MCRegisterInfo *RI, unsigned RA, "
348 << "unsigned DwarfFlavour = 0, unsigned EHFlavour = 0) {\n";
349 OS << " RI->InitMCRegisterInfo(" << TargetName << "RegDesc, "
350 << Regs.size()+1 << ", RA, " << TargetName << "MCRegisterClasses, "
351 << RegisterClasses.size() << ");\n\n";
353 EmitRegMapping(OS, Regs, false);
358 OS << "} // End llvm namespace \n";
359 OS << "#endif // GET_REGINFO_MC_DESC\n\n";
363 RegisterInfoEmitter::runTargetHeader(raw_ostream &OS, CodeGenTarget &Target,
364 CodeGenRegBank &RegBank) {
365 EmitSourceFileHeader("Register Information Header Fragment", OS);
367 OS << "\n#ifdef GET_REGINFO_HEADER\n";
368 OS << "#undef GET_REGINFO_HEADER\n";
370 const std::string &TargetName = Target.getName();
371 std::string ClassName = TargetName + "GenRegisterInfo";
373 OS << "#include \"llvm/Target/TargetRegisterInfo.h\"\n";
374 OS << "#include <string>\n\n";
376 OS << "namespace llvm {\n\n";
378 OS << "struct " << ClassName << " : public TargetRegisterInfo {\n"
379 << " explicit " << ClassName
380 << "(unsigned RA, unsigned D = 0, unsigned E = 0);\n"
381 << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
382 << " { return false; }\n"
383 << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
384 << " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
385 << " unsigned composeSubRegIndices(unsigned, unsigned) const;\n"
388 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
389 if (!SubRegIndices.empty()) {
390 OS << "\n// Subregister indices\n";
391 std::string Namespace = SubRegIndices[0]->getValueAsString("Namespace");
392 if (!Namespace.empty())
393 OS << "namespace " << Namespace << " {\n";
394 OS << "enum {\n NoSubRegister,\n";
395 for (unsigned i = 0, e = RegBank.getNumNamedIndices(); i != e; ++i)
396 OS << " " << SubRegIndices[i]->getName() << ",\t// " << i+1 << "\n";
397 OS << " NUM_TARGET_NAMED_SUBREGS = " << SubRegIndices.size()+1 << "\n";
399 if (!Namespace.empty())
403 const std::vector<CodeGenRegisterClass> &RegisterClasses =
404 Target.getRegisterClasses();
406 if (!RegisterClasses.empty()) {
407 OS << "namespace " << RegisterClasses[0].Namespace
408 << " { // Register classes\n";
410 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
411 const CodeGenRegisterClass &RC = RegisterClasses[i];
412 const std::string &Name = RC.getName();
414 // Output the register class definition.
415 OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
416 << " " << Name << "Class();\n";
417 if (!RC.AltOrderSelect.empty())
418 OS << " ArrayRef<unsigned> "
419 "getRawAllocationOrder(const MachineFunction&) const;\n";
422 // Output the extern for the instance.
423 OS << " extern " << Name << "Class\t" << Name << "RegClass;\n";
424 // Output the extern for the pointer to the instance (should remove).
425 OS << " static TargetRegisterClass * const "<< Name <<"RegisterClass = &"
426 << Name << "RegClass;\n";
428 OS << "} // end of namespace " << TargetName << "\n\n";
430 OS << "} // End llvm namespace \n";
431 OS << "#endif // GET_REGINFO_HEADER\n\n";
435 // runTargetDesc - Output the target register and register file descriptions.
438 RegisterInfoEmitter::runTargetDesc(raw_ostream &OS, CodeGenTarget &Target,
439 CodeGenRegBank &RegBank){
440 EmitSourceFileHeader("Target Register and Register Classes Information", OS);
442 OS << "\n#ifdef GET_REGINFO_TARGET_DESC\n";
443 OS << "#undef GET_REGINFO_TARGET_DESC\n";
445 OS << "namespace llvm {\n\n";
447 // Start out by emitting each of the register classes.
448 const std::vector<CodeGenRegisterClass> &RegisterClasses =
449 Target.getRegisterClasses();
451 // Collect all registers belonging to any allocatable class.
452 std::set<Record*> AllocatableRegs;
454 // Loop over all of the register classes... emitting each one.
455 OS << "namespace { // Register classes...\n";
457 // Emit the register enum value arrays for each RegisterClass
458 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
459 const CodeGenRegisterClass &RC = RegisterClasses[rc];
460 ArrayRef<Record*> Order = RC.getOrder();
462 // Collect allocatable registers.
464 AllocatableRegs.insert(Order.begin(), Order.end());
466 // Give the register class a legal C name if it's anonymous.
467 std::string Name = RC.getName();
469 // Emit the register list now.
470 OS << " // " << Name << " Register Class...\n"
471 << " static const unsigned " << Name
473 for (unsigned i = 0, e = Order.size(); i != e; ++i) {
474 Record *Reg = Order[i];
475 OS << getQualifiedName(Reg) << ", ";
480 // Emit the ValueType arrays for each RegisterClass
481 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
482 const CodeGenRegisterClass &RC = RegisterClasses[rc];
484 // Give the register class a legal C name if it's anonymous.
485 std::string Name = RC.getName() + "VTs";
487 // Emit the register list now.
489 << " Register Class Value Types...\n"
490 << " static const EVT " << Name
492 for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
493 OS << getEnumName(RC.VTs[i]) << ", ";
494 OS << "MVT::Other\n };\n\n";
496 OS << "} // end anonymous namespace\n\n";
498 // Now that all of the structs have been emitted, emit the instances.
499 if (!RegisterClasses.empty()) {
500 OS << "namespace " << RegisterClasses[0].Namespace
501 << " { // Register class instances\n";
502 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
503 OS << " " << RegisterClasses[i].getName() << "Class\t"
504 << RegisterClasses[i].getName() << "RegClass;\n";
506 std::map<unsigned, std::set<unsigned> > SuperClassMap;
507 std::map<unsigned, std::set<unsigned> > SuperRegClassMap;
510 unsigned NumSubRegIndices = RegBank.getSubRegIndices().size();
512 if (NumSubRegIndices) {
513 // Emit the sub-register classes for each RegisterClass
514 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
515 const CodeGenRegisterClass &RC = RegisterClasses[rc];
516 std::vector<Record*> SRC(NumSubRegIndices);
517 for (DenseMap<Record*,Record*>::const_iterator
518 i = RC.SubRegClasses.begin(),
519 e = RC.SubRegClasses.end(); i != e; ++i) {
521 unsigned idx = RegBank.getSubRegIndexNo(i->first);
522 SRC.at(idx-1) = i->second;
524 // Find the register class number of i->second for SuperRegClassMap.
525 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
526 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
527 if (RC2.TheDef == i->second) {
528 SuperRegClassMap[rc2].insert(rc);
534 // Give the register class a legal C name if it's anonymous.
535 std::string Name = RC.TheDef->getName();
538 << " Sub-register Classes...\n"
539 << " static const TargetRegisterClass* const "
540 << Name << "SubRegClasses[] = {\n ";
542 for (unsigned idx = 0; idx != NumSubRegIndices; ++idx) {
546 OS << "&" << getQualifiedName(SRC[idx]) << "RegClass";
553 // Emit the super-register classes for each RegisterClass
554 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
555 const CodeGenRegisterClass &RC = RegisterClasses[rc];
557 // Give the register class a legal C name if it's anonymous.
558 std::string Name = RC.TheDef->getName();
561 << " Super-register Classes...\n"
562 << " static const TargetRegisterClass* const "
563 << Name << "SuperRegClasses[] = {\n ";
566 std::map<unsigned, std::set<unsigned> >::iterator I =
567 SuperRegClassMap.find(rc);
568 if (I != SuperRegClassMap.end()) {
569 for (std::set<unsigned>::iterator II = I->second.begin(),
570 EE = I->second.end(); II != EE; ++II) {
571 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
574 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
579 OS << (!Empty ? ", " : "") << "NULL";
583 // No subregindices in this target
584 OS << " static const TargetRegisterClass* const "
585 << "NullRegClasses[] = { NULL };\n\n";
588 // Emit the sub-classes array for each RegisterClass
589 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
590 const CodeGenRegisterClass &RC = RegisterClasses[rc];
592 // Give the register class a legal C name if it's anonymous.
593 std::string Name = RC.TheDef->getName();
596 << " Register Class sub-classes...\n"
597 << " static const TargetRegisterClass* const "
598 << Name << "Subclasses[] = {\n ";
601 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
602 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
604 // Sub-classes are used to determine if a virtual register can be used
605 // as an instruction operand, or if it must be copied first.
606 if (rc == rc2 || !RC.hasSubClass(&RC2)) continue;
608 if (!Empty) OS << ", ";
609 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
612 std::map<unsigned, std::set<unsigned> >::iterator SCMI =
613 SuperClassMap.find(rc2);
614 if (SCMI == SuperClassMap.end()) {
615 SuperClassMap.insert(std::make_pair(rc2, std::set<unsigned>()));
616 SCMI = SuperClassMap.find(rc2);
618 SCMI->second.insert(rc);
621 OS << (!Empty ? ", " : "") << "NULL";
625 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
626 const CodeGenRegisterClass &RC = RegisterClasses[rc];
628 // Give the register class a legal C name if it's anonymous.
629 std::string Name = RC.TheDef->getName();
632 << " Register Class super-classes...\n"
633 << " static const TargetRegisterClass* const "
634 << Name << "Superclasses[] = {\n ";
637 std::map<unsigned, std::set<unsigned> >::iterator I =
638 SuperClassMap.find(rc);
639 if (I != SuperClassMap.end()) {
640 for (std::set<unsigned>::iterator II = I->second.begin(),
641 EE = I->second.end(); II != EE; ++II) {
642 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
643 if (!Empty) OS << ", ";
644 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
649 OS << (!Empty ? ", " : "") << "NULL";
654 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
655 const CodeGenRegisterClass &RC = RegisterClasses[i];
656 OS << RC.getName() << "Class::" << RC.getName()
657 << "Class() : TargetRegisterClass("
658 << RC.getName() + "RegClassID" << ", "
659 << '\"' << RC.getName() << "\", "
660 << RC.getName() + "VTs" << ", "
661 << RC.getName() + "Subclasses" << ", "
662 << RC.getName() + "Superclasses" << ", "
663 << (NumSubRegIndices ? RC.getName() + "Sub" : std::string("Null"))
665 << (NumSubRegIndices ? RC.getName() + "Super" : std::string("Null"))
667 << RC.SpillSize/8 << ", "
668 << RC.SpillAlignment/8 << ", "
669 << RC.CopyCost << ", "
670 << RC.Allocatable << ", "
671 << RC.getName() << ", " << RC.getName() << " + "
672 << RC.getOrder().size()
674 if (!RC.AltOrderSelect.empty()) {
675 OS << "\nstatic inline unsigned " << RC.getName()
676 << "AltOrderSelect(const MachineFunction &MF) {"
677 << RC.AltOrderSelect << "}\n\nArrayRef<unsigned> "
678 << RC.getName() << "Class::"
679 << "getRawAllocationOrder(const MachineFunction &MF) const {\n";
680 for (unsigned oi = 1 , oe = RC.getNumOrders(); oi != oe; ++oi) {
681 ArrayRef<Record*> Elems = RC.getOrder(oi);
682 OS << " static const unsigned AltOrder" << oi << "[] = {";
683 for (unsigned elem = 0; elem != Elems.size(); ++elem)
684 OS << (elem ? ", " : " ") << getQualifiedName(Elems[elem]);
687 OS << " static const ArrayRef<unsigned> Order[] = {\n"
688 << " makeArrayRef(" << RC.getName();
689 for (unsigned oi = 1, oe = RC.getNumOrders(); oi != oe; ++oi)
690 OS << "),\n makeArrayRef(AltOrder" << oi;
691 OS << ")\n };\n const unsigned Select = " << RC.getName()
692 << "AltOrderSelect(MF);\n assert(Select < " << RC.getNumOrders()
693 << ");\n return Order[Select];\n}\n";
700 OS << "\nnamespace {\n";
701 OS << " const TargetRegisterClass* const RegisterClasses[] = {\n";
702 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
703 OS << " &" << getQualifiedName(RegisterClasses[i].TheDef)
706 OS << "}\n"; // End of anonymous namespace...
708 // Emit extra information about registers.
709 const std::string &TargetName = Target.getName();
710 OS << "\n static const TargetRegisterInfoDesc "
711 << TargetName << "RegInfoDesc[] = "
712 << "{ // Extra Descriptors\n";
713 OS << " { 0, 0 },\n";
715 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
716 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
717 const CodeGenRegister &Reg = *Regs[i];
719 OS << Reg.CostPerUse << ", "
720 << int(AllocatableRegs.count(Reg.TheDef)) << " },\n";
722 OS << " };\n"; // End of register descriptors...
725 // Calculate the mapping of subregister+index pairs to physical registers.
726 // This will also create further anonymous indexes.
727 unsigned NamedIndices = RegBank.getNumNamedIndices();
729 // Emit SubRegIndex names, skipping 0
730 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
731 OS << "\n static const char *const " << TargetName
732 << "SubRegIndexTable[] = { \"";
733 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
734 OS << SubRegIndices[i]->getName();
740 // Emit names of the anonymus subreg indexes.
741 if (SubRegIndices.size() > NamedIndices) {
743 for (unsigned i = NamedIndices, e = SubRegIndices.size(); i != e; ++i) {
744 OS << "\n " << SubRegIndices[i]->getName() << " = " << i+1;
752 std::string ClassName = Target.getName() + "GenRegisterInfo";
754 // Emit the subregister + index mapping function based on the information
756 OS << "unsigned " << ClassName
757 << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
758 << " switch (RegNo) {\n"
759 << " default:\n return 0;\n";
760 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
761 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
764 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
765 OS << " switch (Index) {\n";
766 OS << " default: return 0;\n";
767 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
768 ie = SRM.end(); ii != ie; ++ii)
769 OS << " case " << getQualifiedName(ii->first)
770 << ": return " << getQualifiedName(ii->second->TheDef) << ";\n";
771 OS << " };\n" << " break;\n";
774 OS << " return 0;\n";
777 OS << "unsigned " << ClassName
778 << "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"
779 << " switch (RegNo) {\n"
780 << " default:\n return 0;\n";
781 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
782 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
785 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
786 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
787 ie = SRM.end(); ii != ie; ++ii)
788 OS << " if (SubRegNo == " << getQualifiedName(ii->second->TheDef)
789 << ") return " << getQualifiedName(ii->first) << ";\n";
790 OS << " return 0;\n";
793 OS << " return 0;\n";
796 // Emit composeSubRegIndices
797 OS << "unsigned " << ClassName
798 << "::composeSubRegIndices(unsigned IdxA, unsigned IdxB) const {\n"
799 << " switch (IdxA) {\n"
800 << " default:\n return IdxB;\n";
801 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
803 for (unsigned j = 0; j != e; ++j) {
804 if (Record *Comp = RegBank.getCompositeSubRegIndex(SubRegIndices[i],
807 OS << " case " << getQualifiedName(SubRegIndices[i])
808 << ": switch(IdxB) {\n default: return IdxB;\n";
811 OS << " case " << getQualifiedName(SubRegIndices[j])
812 << ": return " << getQualifiedName(Comp) << ";\n";
820 // Emit the constructor of the class...
821 OS << "extern MCRegisterDesc " << TargetName << "RegDesc[];\n";
822 OS << "extern MCRegisterClass " << TargetName << "MCRegisterClasses[];\n";
824 OS << ClassName << "::" << ClassName
825 << "(unsigned RA, unsigned DwarfFlavour, unsigned EHFlavour)\n"
826 << " : TargetRegisterInfo(" << TargetName << "RegInfoDesc"
827 << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n"
828 << " " << TargetName << "SubRegIndexTable) {\n"
829 << " InitMCRegisterInfo(" << TargetName << "RegDesc, "
830 << Regs.size()+1 << ", RA, " << TargetName << "MCRegisterClasses, "
831 << RegisterClasses.size() << ");\n\n";
833 EmitRegMapping(OS, Regs, true);
837 OS << "} // End llvm namespace \n";
838 OS << "#endif // GET_REGINFO_TARGET_DESC\n\n";
841 void RegisterInfoEmitter::run(raw_ostream &OS) {
842 CodeGenTarget Target(Records);
843 CodeGenRegBank &RegBank = Target.getRegBank();
844 RegBank.computeDerivedInfo();
846 runEnums(OS, Target, RegBank);
847 runMCDesc(OS, Target, RegBank);
848 runTargetHeader(OS, Target, RegBank);
849 runTargetDesc(OS, Target, RegBank);