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 ArrayRef<Record*> Order = RC.getOrder();
333 std::string Name = RC.getName();
335 OS << " MCRegisterClass("
337 << '\"' << RC.getName() << "\", "
338 << RC.SpillSize/8 << ", "
339 << RC.SpillAlignment/8 << ", "
340 << RC.CopyCost << ", "
341 << RC.Allocatable << ", "
342 << RC.getName() << ", " << RC.getName() << " + "
343 << RC.getOrder().size()
349 // MCRegisterInfo initialization routine.
350 OS << "static inline void Init" << TargetName
351 << "MCRegisterInfo(MCRegisterInfo *RI, unsigned RA, "
352 << "unsigned DwarfFlavour = 0, unsigned EHFlavour = 0) {\n";
353 OS << " RI->InitMCRegisterInfo(" << TargetName << "RegDesc, "
354 << Regs.size()+1 << ", RA, " << TargetName << "MCRegisterClasses, "
355 << RegisterClasses.size() << ");\n\n";
357 EmitRegMapping(OS, Regs, false);
362 OS << "} // End llvm namespace \n";
363 OS << "#endif // GET_REGINFO_MC_DESC\n\n";
367 RegisterInfoEmitter::runTargetHeader(raw_ostream &OS, CodeGenTarget &Target,
368 CodeGenRegBank &RegBank) {
369 EmitSourceFileHeader("Register Information Header Fragment", OS);
371 OS << "\n#ifdef GET_REGINFO_HEADER\n";
372 OS << "#undef GET_REGINFO_HEADER\n";
374 const std::string &TargetName = Target.getName();
375 std::string ClassName = TargetName + "GenRegisterInfo";
377 OS << "#include \"llvm/Target/TargetRegisterInfo.h\"\n";
378 OS << "#include <string>\n\n";
380 OS << "namespace llvm {\n\n";
382 OS << "struct " << ClassName << " : public TargetRegisterInfo {\n"
383 << " explicit " << ClassName
384 << "(unsigned RA, unsigned D = 0, unsigned E = 0);\n"
385 << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
386 << " { return false; }\n"
387 << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
388 << " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
389 << " unsigned composeSubRegIndices(unsigned, unsigned) const;\n"
392 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
393 if (!SubRegIndices.empty()) {
394 OS << "\n// Subregister indices\n";
395 std::string Namespace = SubRegIndices[0]->getValueAsString("Namespace");
396 if (!Namespace.empty())
397 OS << "namespace " << Namespace << " {\n";
398 OS << "enum {\n NoSubRegister,\n";
399 for (unsigned i = 0, e = RegBank.getNumNamedIndices(); i != e; ++i)
400 OS << " " << SubRegIndices[i]->getName() << ",\t// " << i+1 << "\n";
401 OS << " NUM_TARGET_NAMED_SUBREGS = " << SubRegIndices.size()+1 << "\n";
403 if (!Namespace.empty())
407 const std::vector<CodeGenRegisterClass> &RegisterClasses =
408 Target.getRegisterClasses();
410 if (!RegisterClasses.empty()) {
411 OS << "namespace " << RegisterClasses[0].Namespace
412 << " { // Register classes\n";
414 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
415 const CodeGenRegisterClass &RC = RegisterClasses[i];
416 const std::string &Name = RC.getName();
418 // Output the register class definition.
419 OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
420 << " " << Name << "Class();\n";
421 if (!RC.AltOrderSelect.empty())
422 OS << " ArrayRef<unsigned> "
423 "getRawAllocationOrder(const MachineFunction&) const;\n";
426 // Output the extern for the instance.
427 OS << " extern " << Name << "Class\t" << Name << "RegClass;\n";
428 // Output the extern for the pointer to the instance (should remove).
429 OS << " static TargetRegisterClass * const "<< Name <<"RegisterClass = &"
430 << Name << "RegClass;\n";
432 OS << "} // end of namespace " << TargetName << "\n\n";
434 OS << "} // End llvm namespace \n";
435 OS << "#endif // GET_REGINFO_HEADER\n\n";
439 // runTargetDesc - Output the target register and register file descriptions.
442 RegisterInfoEmitter::runTargetDesc(raw_ostream &OS, CodeGenTarget &Target,
443 CodeGenRegBank &RegBank){
444 EmitSourceFileHeader("Target Register and Register Classes Information", OS);
446 OS << "\n#ifdef GET_REGINFO_TARGET_DESC\n";
447 OS << "#undef GET_REGINFO_TARGET_DESC\n";
449 OS << "namespace llvm {\n\n";
451 // Start out by emitting each of the register classes.
452 const std::vector<CodeGenRegisterClass> &RegisterClasses =
453 Target.getRegisterClasses();
455 // Collect all registers belonging to any allocatable class.
456 std::set<Record*> AllocatableRegs;
458 // Loop over all of the register classes... emitting each one.
459 OS << "namespace { // Register classes...\n";
461 // Emit the register enum value arrays for each RegisterClass
462 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
463 const CodeGenRegisterClass &RC = RegisterClasses[rc];
464 ArrayRef<Record*> Order = RC.getOrder();
466 // Collect allocatable registers.
468 AllocatableRegs.insert(Order.begin(), Order.end());
470 // Give the register class a legal C name if it's anonymous.
471 std::string Name = RC.getName();
473 // Emit the register list now.
474 OS << " // " << Name << " Register Class...\n"
475 << " static const unsigned " << Name
477 for (unsigned i = 0, e = Order.size(); i != e; ++i) {
478 Record *Reg = Order[i];
479 OS << getQualifiedName(Reg) << ", ";
484 // Emit the ValueType arrays for each RegisterClass
485 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
486 const CodeGenRegisterClass &RC = RegisterClasses[rc];
488 // Give the register class a legal C name if it's anonymous.
489 std::string Name = RC.getName() + "VTs";
491 // Emit the register list now.
493 << " Register Class Value Types...\n"
494 << " static const EVT " << Name
496 for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
497 OS << getEnumName(RC.VTs[i]) << ", ";
498 OS << "MVT::Other\n };\n\n";
500 OS << "} // end anonymous namespace\n\n";
502 // Now that all of the structs have been emitted, emit the instances.
503 if (!RegisterClasses.empty()) {
504 OS << "namespace " << RegisterClasses[0].Namespace
505 << " { // Register class instances\n";
506 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
507 OS << " " << RegisterClasses[i].getName() << "Class\t"
508 << RegisterClasses[i].getName() << "RegClass;\n";
510 std::map<unsigned, std::set<unsigned> > SuperClassMap;
511 std::map<unsigned, std::set<unsigned> > SuperRegClassMap;
514 unsigned NumSubRegIndices = RegBank.getSubRegIndices().size();
516 if (NumSubRegIndices) {
517 // Emit the sub-register classes for each RegisterClass
518 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
519 const CodeGenRegisterClass &RC = RegisterClasses[rc];
520 std::vector<Record*> SRC(NumSubRegIndices);
521 for (DenseMap<Record*,Record*>::const_iterator
522 i = RC.SubRegClasses.begin(),
523 e = RC.SubRegClasses.end(); i != e; ++i) {
525 unsigned idx = RegBank.getSubRegIndexNo(i->first);
526 SRC.at(idx-1) = i->second;
528 // Find the register class number of i->second for SuperRegClassMap.
529 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
530 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
531 if (RC2.TheDef == i->second) {
532 SuperRegClassMap[rc2].insert(rc);
538 // Give the register class a legal C name if it's anonymous.
539 std::string Name = RC.TheDef->getName();
542 << " Sub-register Classes...\n"
543 << " static const TargetRegisterClass* const "
544 << Name << "SubRegClasses[] = {\n ";
546 for (unsigned idx = 0; idx != NumSubRegIndices; ++idx) {
550 OS << "&" << getQualifiedName(SRC[idx]) << "RegClass";
557 // Emit the super-register classes for each RegisterClass
558 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
559 const CodeGenRegisterClass &RC = RegisterClasses[rc];
561 // Give the register class a legal C name if it's anonymous.
562 std::string Name = RC.TheDef->getName();
565 << " Super-register Classes...\n"
566 << " static const TargetRegisterClass* const "
567 << Name << "SuperRegClasses[] = {\n ";
570 std::map<unsigned, std::set<unsigned> >::iterator I =
571 SuperRegClassMap.find(rc);
572 if (I != SuperRegClassMap.end()) {
573 for (std::set<unsigned>::iterator II = I->second.begin(),
574 EE = I->second.end(); II != EE; ++II) {
575 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
578 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
583 OS << (!Empty ? ", " : "") << "NULL";
587 // No subregindices in this target
588 OS << " static const TargetRegisterClass* const "
589 << "NullRegClasses[] = { NULL };\n\n";
592 // Emit the sub-classes array for each RegisterClass
593 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
594 const CodeGenRegisterClass &RC = RegisterClasses[rc];
596 // Give the register class a legal C name if it's anonymous.
597 std::string Name = RC.TheDef->getName();
600 << " Register Class sub-classes...\n"
601 << " static const TargetRegisterClass* const "
602 << Name << "Subclasses[] = {\n ";
605 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
606 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
608 // Sub-classes are used to determine if a virtual register can be used
609 // as an instruction operand, or if it must be copied first.
610 if (rc == rc2 || !RC.hasSubClass(&RC2)) continue;
612 if (!Empty) OS << ", ";
613 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
616 std::map<unsigned, std::set<unsigned> >::iterator SCMI =
617 SuperClassMap.find(rc2);
618 if (SCMI == SuperClassMap.end()) {
619 SuperClassMap.insert(std::make_pair(rc2, std::set<unsigned>()));
620 SCMI = SuperClassMap.find(rc2);
622 SCMI->second.insert(rc);
625 OS << (!Empty ? ", " : "") << "NULL";
629 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
630 const CodeGenRegisterClass &RC = RegisterClasses[rc];
632 // Give the register class a legal C name if it's anonymous.
633 std::string Name = RC.TheDef->getName();
636 << " Register Class super-classes...\n"
637 << " static const TargetRegisterClass* const "
638 << Name << "Superclasses[] = {\n ";
641 std::map<unsigned, std::set<unsigned> >::iterator I =
642 SuperClassMap.find(rc);
643 if (I != SuperClassMap.end()) {
644 for (std::set<unsigned>::iterator II = I->second.begin(),
645 EE = I->second.end(); II != EE; ++II) {
646 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
647 if (!Empty) OS << ", ";
648 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
653 OS << (!Empty ? ", " : "") << "NULL";
658 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
659 const CodeGenRegisterClass &RC = RegisterClasses[i];
660 OS << RC.getName() << "Class::" << RC.getName()
661 << "Class() : TargetRegisterClass("
662 << RC.getName() + "RegClassID" << ", "
663 << '\"' << RC.getName() << "\", "
664 << RC.getName() + "VTs" << ", "
665 << RC.getName() + "Subclasses" << ", "
666 << RC.getName() + "Superclasses" << ", "
667 << (NumSubRegIndices ? RC.getName() + "Sub" : std::string("Null"))
669 << (NumSubRegIndices ? RC.getName() + "Super" : std::string("Null"))
671 << RC.SpillSize/8 << ", "
672 << RC.SpillAlignment/8 << ", "
673 << RC.CopyCost << ", "
674 << RC.Allocatable << ", "
675 << RC.getName() << ", " << RC.getName() << " + "
676 << RC.getOrder().size()
678 if (!RC.AltOrderSelect.empty()) {
679 OS << "\nstatic inline unsigned " << RC.getName()
680 << "AltOrderSelect(const MachineFunction &MF) {"
681 << RC.AltOrderSelect << "}\n\nArrayRef<unsigned> "
682 << RC.getName() << "Class::"
683 << "getRawAllocationOrder(const MachineFunction &MF) const {\n";
684 for (unsigned oi = 1 , oe = RC.getNumOrders(); oi != oe; ++oi) {
685 ArrayRef<Record*> Elems = RC.getOrder(oi);
686 OS << " static const unsigned AltOrder" << oi << "[] = {";
687 for (unsigned elem = 0; elem != Elems.size(); ++elem)
688 OS << (elem ? ", " : " ") << getQualifiedName(Elems[elem]);
691 OS << " static const ArrayRef<unsigned> Order[] = {\n"
692 << " makeArrayRef(" << RC.getName();
693 for (unsigned oi = 1, oe = RC.getNumOrders(); oi != oe; ++oi)
694 OS << "),\n makeArrayRef(AltOrder" << oi;
695 OS << ")\n };\n const unsigned Select = " << RC.getName()
696 << "AltOrderSelect(MF);\n assert(Select < " << RC.getNumOrders()
697 << ");\n return Order[Select];\n}\n";
704 OS << "\nnamespace {\n";
705 OS << " const TargetRegisterClass* const RegisterClasses[] = {\n";
706 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
707 OS << " &" << getQualifiedName(RegisterClasses[i].TheDef)
710 OS << "}\n"; // End of anonymous namespace...
712 // Emit extra information about registers.
713 const std::string &TargetName = Target.getName();
714 OS << "\n static const TargetRegisterInfoDesc "
715 << TargetName << "RegInfoDesc[] = "
716 << "{ // Extra Descriptors\n";
717 OS << " { 0, 0 },\n";
719 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
720 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
721 const CodeGenRegister &Reg = *Regs[i];
723 OS << Reg.CostPerUse << ", "
724 << int(AllocatableRegs.count(Reg.TheDef)) << " },\n";
726 OS << " };\n"; // End of register descriptors...
729 // Calculate the mapping of subregister+index pairs to physical registers.
730 // This will also create further anonymous indexes.
731 unsigned NamedIndices = RegBank.getNumNamedIndices();
733 // Emit SubRegIndex names, skipping 0
734 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
735 OS << "\n static const char *const " << TargetName
736 << "SubRegIndexTable[] = { \"";
737 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
738 OS << SubRegIndices[i]->getName();
744 // Emit names of the anonymus subreg indexes.
745 if (SubRegIndices.size() > NamedIndices) {
747 for (unsigned i = NamedIndices, e = SubRegIndices.size(); i != e; ++i) {
748 OS << "\n " << SubRegIndices[i]->getName() << " = " << i+1;
756 std::string ClassName = Target.getName() + "GenRegisterInfo";
758 // Emit the subregister + index mapping function based on the information
760 OS << "unsigned " << ClassName
761 << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
762 << " switch (RegNo) {\n"
763 << " default:\n return 0;\n";
764 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
765 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
768 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
769 OS << " switch (Index) {\n";
770 OS << " default: return 0;\n";
771 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
772 ie = SRM.end(); ii != ie; ++ii)
773 OS << " case " << getQualifiedName(ii->first)
774 << ": return " << getQualifiedName(ii->second->TheDef) << ";\n";
775 OS << " };\n" << " break;\n";
778 OS << " return 0;\n";
781 OS << "unsigned " << ClassName
782 << "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"
783 << " switch (RegNo) {\n"
784 << " default:\n return 0;\n";
785 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
786 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
789 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
790 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
791 ie = SRM.end(); ii != ie; ++ii)
792 OS << " if (SubRegNo == " << getQualifiedName(ii->second->TheDef)
793 << ") return " << getQualifiedName(ii->first) << ";\n";
794 OS << " return 0;\n";
797 OS << " return 0;\n";
800 // Emit composeSubRegIndices
801 OS << "unsigned " << ClassName
802 << "::composeSubRegIndices(unsigned IdxA, unsigned IdxB) const {\n"
803 << " switch (IdxA) {\n"
804 << " default:\n return IdxB;\n";
805 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
807 for (unsigned j = 0; j != e; ++j) {
808 if (Record *Comp = RegBank.getCompositeSubRegIndex(SubRegIndices[i],
811 OS << " case " << getQualifiedName(SubRegIndices[i])
812 << ": switch(IdxB) {\n default: return IdxB;\n";
815 OS << " case " << getQualifiedName(SubRegIndices[j])
816 << ": return " << getQualifiedName(Comp) << ";\n";
824 // Emit the constructor of the class...
825 OS << "extern MCRegisterDesc " << TargetName << "RegDesc[];\n";
826 OS << "extern MCRegisterClass " << TargetName << "MCRegisterClasses[];\n";
828 OS << ClassName << "::" << ClassName
829 << "(unsigned RA, unsigned DwarfFlavour, unsigned EHFlavour)\n"
830 << " : TargetRegisterInfo(" << TargetName << "RegInfoDesc"
831 << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n"
832 << " " << TargetName << "SubRegIndexTable) {\n"
833 << " InitMCRegisterInfo(" << TargetName << "RegDesc, "
834 << Regs.size()+1 << ", RA, " << TargetName << "MCRegisterClasses, "
835 << RegisterClasses.size() << ");\n\n";
837 EmitRegMapping(OS, Regs, true);
841 OS << "} // End llvm namespace \n";
842 OS << "#endif // GET_REGINFO_TARGET_DESC\n\n";
845 void RegisterInfoEmitter::run(raw_ostream &OS) {
846 CodeGenTarget Target(Records);
847 CodeGenRegBank &RegBank = Target.getRegBank();
848 RegBank.computeDerivedInfo();
850 runEnums(OS, Target, RegBank);
851 runMCDesc(OS, Target, RegBank);
852 runTargetHeader(OS, Target, RegBank);
853 runTargetDesc(OS, Target, RegBank);