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 OS << "namespace " << RegisterClasses[0].Namespace << " {\n";
62 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
64 OS << " " << RegisterClasses[i].getName() << "RegClassID";
71 OS << "} // End llvm namespace \n";
72 OS << "#endif // GET_REGINFO_ENUM\n\n";
76 // runMCDesc - Print out MC register descriptions.
79 RegisterInfoEmitter::runMCDesc(raw_ostream &OS, CodeGenTarget &Target,
80 CodeGenRegBank &RegBank) {
81 EmitSourceFileHeader("MC Register Information", OS);
83 OS << "\n#ifdef GET_REGINFO_MC_DESC\n";
84 OS << "#undef GET_REGINFO_MC_DESC\n";
86 std::map<const CodeGenRegister*, CodeGenRegister::Set> Overlaps;
87 RegBank.computeOverlaps(Overlaps);
89 OS << "namespace llvm {\n\n";
91 const std::string &TargetName = Target.getName();
92 std::string ClassName = TargetName + "GenMCRegisterInfo";
93 OS << "struct " << ClassName << " : public MCRegisterInfo {\n"
94 << " explicit " << ClassName << "(const MCRegisterDesc *D);\n";
97 OS << "\nnamespace {\n";
99 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
101 // Emit an overlap list for all registers.
102 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
103 const CodeGenRegister *Reg = Regs[i];
104 const CodeGenRegister::Set &O = Overlaps[Reg];
105 // Move Reg to the front so TRI::getAliasSet can share the list.
106 OS << " const unsigned " << Reg->getName() << "_Overlaps[] = { "
107 << getQualifiedName(Reg->TheDef) << ", ";
108 for (CodeGenRegister::Set::const_iterator I = O.begin(), E = O.end();
111 OS << getQualifiedName((*I)->TheDef) << ", ";
115 const std::vector<Record*> RegAltNameIndices = Target.getRegAltNameIndices();
116 // If the only definition is the default NoRegAltName, we don't need to
118 if (RegAltNameIndices.size() > 1) {
119 OS << "\n// Register alternate name indices\n";
121 for (unsigned i = 0, e = RegAltNameIndices.size(); i != e; ++i)
122 OS << " " << RegAltNameIndices[i]->getName() << ",\t// " << i << "\n";
123 OS << " NUM_TARGET_REG_ALT_NAMES = " << RegAltNameIndices.size() << "\n";
127 // Emit the empty sub-registers list
128 OS << " const unsigned Empty_SubRegsSet[] = { 0 };\n";
129 // Loop over all of the registers which have sub-registers, emitting the
130 // sub-registers list to memory.
131 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
132 const CodeGenRegister &Reg = *Regs[i];
133 if (Reg.getSubRegs().empty())
135 // getSubRegs() orders by SubRegIndex. We want a topological order.
136 SetVector<CodeGenRegister*> SR;
137 Reg.addSubRegsPreOrder(SR);
138 OS << " const unsigned " << Reg.getName() << "_SubRegsSet[] = { ";
139 for (unsigned j = 0, je = SR.size(); j != je; ++j)
140 OS << getQualifiedName(SR[j]->TheDef) << ", ";
144 // Emit the empty super-registers list
145 OS << " const unsigned Empty_SuperRegsSet[] = { 0 };\n";
146 // Loop over all of the registers which have super-registers, emitting the
147 // super-registers list to memory.
148 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
149 const CodeGenRegister &Reg = *Regs[i];
150 const CodeGenRegister::SuperRegList &SR = Reg.getSuperRegs();
153 OS << " const unsigned " << Reg.getName() << "_SuperRegsSet[] = { ";
154 for (unsigned j = 0, je = SR.size(); j != je; ++j)
155 OS << getQualifiedName(SR[j]->TheDef) << ", ";
159 OS << "\n const MCRegisterDesc " << TargetName
160 << "RegDesc[] = { // Descriptors\n";
161 OS << " { \"NOREG\",\t0,\t0,\t0 },\n";
163 // Now that register alias and sub-registers sets have been emitted, emit the
164 // register descriptors now.
165 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
166 const CodeGenRegister &Reg = *Regs[i];
168 OS << Reg.getName() << "\",\t" << Reg.getName() << "_Overlaps,\t";
169 if (!Reg.getSubRegs().empty())
170 OS << Reg.getName() << "_SubRegsSet,\t";
172 OS << "Empty_SubRegsSet,\t";
173 if (!Reg.getSuperRegs().empty())
174 OS << Reg.getName() << "_SuperRegsSet";
176 OS << "Empty_SuperRegsSet";
179 OS << " };\n"; // End of register descriptors...
181 OS << "}\n\n"; // End of anonymous namespace...
183 // MCRegisterInfo initialization routine.
184 OS << "static inline void Init" << TargetName
185 << "MCRegisterInfo(MCRegisterInfo *RI) {\n";
186 OS << " RI->InitMCRegisterInfo(" << TargetName << "RegDesc, "
187 << Regs.size()+1 << ");\n}\n\n";
189 OS << "} // End llvm namespace \n";
190 OS << "#endif // GET_REGINFO_MC_DESC\n\n";
194 RegisterInfoEmitter::runTargetHeader(raw_ostream &OS, CodeGenTarget &Target,
195 CodeGenRegBank &RegBank) {
196 EmitSourceFileHeader("Register Information Header Fragment", OS);
198 OS << "\n#ifdef GET_REGINFO_HEADER\n";
199 OS << "#undef GET_REGINFO_HEADER\n";
201 const std::string &TargetName = Target.getName();
202 std::string ClassName = TargetName + "GenRegisterInfo";
204 OS << "#include \"llvm/Target/TargetRegisterInfo.h\"\n";
205 OS << "#include <string>\n\n";
207 OS << "namespace llvm {\n\n";
209 OS << "struct " << ClassName << " : public TargetRegisterInfo {\n"
210 << " explicit " << ClassName
211 << "(const MCRegisterDesc *D, const TargetRegisterInfoDesc *ID, "
212 << "int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n"
213 << " virtual int getDwarfRegNumFull(unsigned RegNum, "
214 << "unsigned Flavour) const;\n"
215 << " virtual int getLLVMRegNumFull(unsigned DwarfRegNum, "
216 << "unsigned Flavour) const;\n"
217 << " virtual int getDwarfRegNum(unsigned RegNum, bool isEH) const = 0;\n"
218 << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
219 << " { return false; }\n"
220 << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
221 << " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
222 << " unsigned composeSubRegIndices(unsigned, unsigned) const;\n"
225 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
226 if (!SubRegIndices.empty()) {
227 OS << "\n// Subregister indices\n";
228 std::string Namespace = SubRegIndices[0]->getValueAsString("Namespace");
229 if (!Namespace.empty())
230 OS << "namespace " << Namespace << " {\n";
231 OS << "enum {\n NoSubRegister,\n";
232 for (unsigned i = 0, e = RegBank.getNumNamedIndices(); i != e; ++i)
233 OS << " " << SubRegIndices[i]->getName() << ",\t// " << i+1 << "\n";
234 OS << " NUM_TARGET_NAMED_SUBREGS = " << SubRegIndices.size()+1 << "\n";
236 if (!Namespace.empty())
240 const std::vector<CodeGenRegisterClass> &RegisterClasses =
241 Target.getRegisterClasses();
243 if (!RegisterClasses.empty()) {
244 OS << "namespace " << RegisterClasses[0].Namespace
245 << " { // Register classes\n";
247 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
248 const CodeGenRegisterClass &RC = RegisterClasses[i];
249 const std::string &Name = RC.getName();
251 // Output the register class definition.
252 OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
253 << " " << Name << "Class();\n";
254 if (!RC.AltOrderSelect.empty())
255 OS << " ArrayRef<unsigned> "
256 "getRawAllocationOrder(const MachineFunction&) const;\n";
259 // Output the extern for the instance.
260 OS << " extern " << Name << "Class\t" << Name << "RegClass;\n";
261 // Output the extern for the pointer to the instance (should remove).
262 OS << " static TargetRegisterClass * const "<< Name <<"RegisterClass = &"
263 << Name << "RegClass;\n";
265 OS << "} // end of namespace " << TargetName << "\n\n";
267 OS << "} // End llvm namespace \n";
268 OS << "#endif // GET_REGINFO_HEADER\n\n";
272 // runTargetDesc - Output the target register and register file descriptions.
275 RegisterInfoEmitter::runTargetDesc(raw_ostream &OS, CodeGenTarget &Target,
276 CodeGenRegBank &RegBank){
277 EmitSourceFileHeader("Target Register and Register Classes Information", OS);
279 OS << "\n#ifdef GET_REGINFO_TARGET_DESC\n";
280 OS << "#undef GET_REGINFO_TARGET_DESC\n";
282 OS << "namespace llvm {\n\n";
284 // Start out by emitting each of the register classes.
285 const std::vector<CodeGenRegisterClass> &RegisterClasses =
286 Target.getRegisterClasses();
288 // Collect all registers belonging to any allocatable class.
289 std::set<Record*> AllocatableRegs;
291 // Loop over all of the register classes... emitting each one.
292 OS << "namespace { // Register classes...\n";
294 // Emit the register enum value arrays for each RegisterClass
295 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
296 const CodeGenRegisterClass &RC = RegisterClasses[rc];
297 ArrayRef<Record*> Order = RC.getOrder();
299 // Collect allocatable registers.
301 AllocatableRegs.insert(Order.begin(), Order.end());
303 // Give the register class a legal C name if it's anonymous.
304 std::string Name = RC.getName();
306 // Emit the register list now.
307 OS << " // " << Name << " Register Class...\n"
308 << " static const unsigned " << Name
310 for (unsigned i = 0, e = Order.size(); i != e; ++i) {
311 Record *Reg = Order[i];
312 OS << getQualifiedName(Reg) << ", ";
317 // Emit the ValueType arrays for each RegisterClass
318 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
319 const CodeGenRegisterClass &RC = RegisterClasses[rc];
321 // Give the register class a legal C name if it's anonymous.
322 std::string Name = RC.getName() + "VTs";
324 // Emit the register list now.
326 << " Register Class Value Types...\n"
327 << " static const EVT " << Name
329 for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
330 OS << getEnumName(RC.VTs[i]) << ", ";
331 OS << "MVT::Other\n };\n\n";
333 OS << "} // end anonymous namespace\n\n";
335 // Now that all of the structs have been emitted, emit the instances.
336 if (!RegisterClasses.empty()) {
337 OS << "namespace " << RegisterClasses[0].Namespace
338 << " { // Register class instances\n";
339 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
340 OS << " " << RegisterClasses[i].getName() << "Class\t"
341 << RegisterClasses[i].getName() << "RegClass;\n";
343 std::map<unsigned, std::set<unsigned> > SuperClassMap;
344 std::map<unsigned, std::set<unsigned> > SuperRegClassMap;
347 unsigned NumSubRegIndices = RegBank.getSubRegIndices().size();
349 if (NumSubRegIndices) {
350 // Emit the sub-register classes for each RegisterClass
351 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
352 const CodeGenRegisterClass &RC = RegisterClasses[rc];
353 std::vector<Record*> SRC(NumSubRegIndices);
354 for (DenseMap<Record*,Record*>::const_iterator
355 i = RC.SubRegClasses.begin(),
356 e = RC.SubRegClasses.end(); i != e; ++i) {
358 unsigned idx = RegBank.getSubRegIndexNo(i->first);
359 SRC.at(idx-1) = i->second;
361 // Find the register class number of i->second for SuperRegClassMap.
362 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
363 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
364 if (RC2.TheDef == i->second) {
365 SuperRegClassMap[rc2].insert(rc);
371 // Give the register class a legal C name if it's anonymous.
372 std::string Name = RC.TheDef->getName();
375 << " Sub-register Classes...\n"
376 << " static const TargetRegisterClass* const "
377 << Name << "SubRegClasses[] = {\n ";
379 for (unsigned idx = 0; idx != NumSubRegIndices; ++idx) {
383 OS << "&" << getQualifiedName(SRC[idx]) << "RegClass";
390 // Emit the super-register classes for each RegisterClass
391 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
392 const CodeGenRegisterClass &RC = RegisterClasses[rc];
394 // Give the register class a legal C name if it's anonymous.
395 std::string Name = RC.TheDef->getName();
398 << " Super-register Classes...\n"
399 << " static const TargetRegisterClass* const "
400 << Name << "SuperRegClasses[] = {\n ";
403 std::map<unsigned, std::set<unsigned> >::iterator I =
404 SuperRegClassMap.find(rc);
405 if (I != SuperRegClassMap.end()) {
406 for (std::set<unsigned>::iterator II = I->second.begin(),
407 EE = I->second.end(); II != EE; ++II) {
408 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
411 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
416 OS << (!Empty ? ", " : "") << "NULL";
420 // No subregindices in this target
421 OS << " static const TargetRegisterClass* const "
422 << "NullRegClasses[] = { NULL };\n\n";
425 // Emit the sub-classes array for each RegisterClass
426 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
427 const CodeGenRegisterClass &RC = RegisterClasses[rc];
429 // Give the register class a legal C name if it's anonymous.
430 std::string Name = RC.TheDef->getName();
433 << " Register Class sub-classes...\n"
434 << " static const TargetRegisterClass* const "
435 << Name << "Subclasses[] = {\n ";
438 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
439 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
441 // Sub-classes are used to determine if a virtual register can be used
442 // as an instruction operand, or if it must be copied first.
443 if (rc == rc2 || !RC.hasSubClass(&RC2)) continue;
445 if (!Empty) OS << ", ";
446 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
449 std::map<unsigned, std::set<unsigned> >::iterator SCMI =
450 SuperClassMap.find(rc2);
451 if (SCMI == SuperClassMap.end()) {
452 SuperClassMap.insert(std::make_pair(rc2, std::set<unsigned>()));
453 SCMI = SuperClassMap.find(rc2);
455 SCMI->second.insert(rc);
458 OS << (!Empty ? ", " : "") << "NULL";
462 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
463 const CodeGenRegisterClass &RC = RegisterClasses[rc];
465 // Give the register class a legal C name if it's anonymous.
466 std::string Name = RC.TheDef->getName();
469 << " Register Class super-classes...\n"
470 << " static const TargetRegisterClass* const "
471 << Name << "Superclasses[] = {\n ";
474 std::map<unsigned, std::set<unsigned> >::iterator I =
475 SuperClassMap.find(rc);
476 if (I != SuperClassMap.end()) {
477 for (std::set<unsigned>::iterator II = I->second.begin(),
478 EE = I->second.end(); II != EE; ++II) {
479 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
480 if (!Empty) OS << ", ";
481 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
486 OS << (!Empty ? ", " : "") << "NULL";
491 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
492 const CodeGenRegisterClass &RC = RegisterClasses[i];
493 OS << RC.getName() << "Class::" << RC.getName()
494 << "Class() : TargetRegisterClass("
495 << RC.getName() + "RegClassID" << ", "
496 << '\"' << RC.getName() << "\", "
497 << RC.getName() + "VTs" << ", "
498 << RC.getName() + "Subclasses" << ", "
499 << RC.getName() + "Superclasses" << ", "
500 << (NumSubRegIndices ? RC.getName() + "Sub" : std::string("Null"))
502 << (NumSubRegIndices ? RC.getName() + "Super" : std::string("Null"))
504 << RC.SpillSize/8 << ", "
505 << RC.SpillAlignment/8 << ", "
506 << RC.CopyCost << ", "
507 << RC.Allocatable << ", "
508 << RC.getName() << ", " << RC.getName() << " + "
509 << RC.getOrder().size()
511 if (!RC.AltOrderSelect.empty()) {
512 OS << "\nstatic inline unsigned " << RC.getName()
513 << "AltOrderSelect(const MachineFunction &MF) {"
514 << RC.AltOrderSelect << "}\n\nArrayRef<unsigned> "
515 << RC.getName() << "Class::"
516 << "getRawAllocationOrder(const MachineFunction &MF) const {\n";
517 for (unsigned oi = 1 , oe = RC.getNumOrders(); oi != oe; ++oi) {
518 ArrayRef<Record*> Elems = RC.getOrder(oi);
519 OS << " static const unsigned AltOrder" << oi << "[] = {";
520 for (unsigned elem = 0; elem != Elems.size(); ++elem)
521 OS << (elem ? ", " : " ") << getQualifiedName(Elems[elem]);
524 OS << " static const ArrayRef<unsigned> Order[] = {\n"
525 << " ArrayRef<unsigned>(" << RC.getName();
526 for (unsigned oi = 1, oe = RC.getNumOrders(); oi != oe; ++oi)
527 OS << "),\n ArrayRef<unsigned>(AltOrder" << oi;
528 OS << ")\n };\n const unsigned Select = " << RC.getName()
529 << "AltOrderSelect(MF);\n assert(Select < " << RC.getNumOrders()
530 << ");\n return Order[Select];\n}\n";
537 OS << "\nnamespace {\n";
538 OS << " const TargetRegisterClass* const RegisterClasses[] = {\n";
539 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
540 OS << " &" << getQualifiedName(RegisterClasses[i].TheDef)
544 // Emit extra information about registers.
545 OS << "\n static const TargetRegisterInfoDesc "
546 << Target.getName() << "RegInfoDesc[] = "
547 << "{ // Extra Descriptors\n";
548 OS << " { 0, 0 },\n";
550 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
551 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
552 const CodeGenRegister &Reg = *Regs[i];
554 OS << Reg.CostPerUse << ", "
555 << int(AllocatableRegs.count(Reg.TheDef)) << " },\n";
557 OS << " };\n"; // End of register descriptors...
560 // Calculate the mapping of subregister+index pairs to physical registers.
561 // This will also create further anonymous indexes.
562 unsigned NamedIndices = RegBank.getNumNamedIndices();
564 // Emit SubRegIndex names, skipping 0
565 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
566 OS << "\n const char *const SubRegIndexTable[] = { \"";
567 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
568 OS << SubRegIndices[i]->getName();
574 // Emit names of the anonymus subreg indexes.
575 if (SubRegIndices.size() > NamedIndices) {
577 for (unsigned i = NamedIndices, e = SubRegIndices.size(); i != e; ++i) {
578 OS << "\n " << SubRegIndices[i]->getName() << " = " << i+1;
584 OS << "}\n\n"; // End of anonymous namespace...
586 std::string ClassName = Target.getName() + "GenRegisterInfo";
588 // Emit the subregister + index mapping function based on the information
590 OS << "unsigned " << ClassName
591 << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
592 << " switch (RegNo) {\n"
593 << " default:\n return 0;\n";
594 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
595 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
598 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
599 OS << " switch (Index) {\n";
600 OS << " default: return 0;\n";
601 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
602 ie = SRM.end(); ii != ie; ++ii)
603 OS << " case " << getQualifiedName(ii->first)
604 << ": return " << getQualifiedName(ii->second->TheDef) << ";\n";
605 OS << " };\n" << " break;\n";
608 OS << " return 0;\n";
611 OS << "unsigned " << ClassName
612 << "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"
613 << " switch (RegNo) {\n"
614 << " default:\n return 0;\n";
615 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
616 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
619 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
620 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
621 ie = SRM.end(); ii != ie; ++ii)
622 OS << " if (SubRegNo == " << getQualifiedName(ii->second->TheDef)
623 << ") return " << getQualifiedName(ii->first) << ";\n";
624 OS << " return 0;\n";
627 OS << " return 0;\n";
630 // Emit composeSubRegIndices
631 OS << "unsigned " << ClassName
632 << "::composeSubRegIndices(unsigned IdxA, unsigned IdxB) const {\n"
633 << " switch (IdxA) {\n"
634 << " default:\n return IdxB;\n";
635 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
637 for (unsigned j = 0; j != e; ++j) {
638 if (Record *Comp = RegBank.getCompositeSubRegIndex(SubRegIndices[i],
641 OS << " case " << getQualifiedName(SubRegIndices[i])
642 << ": switch(IdxB) {\n default: return IdxB;\n";
645 OS << " case " << getQualifiedName(SubRegIndices[j])
646 << ": return " << getQualifiedName(Comp) << ";\n";
654 // Emit the constructor of the class...
655 OS << ClassName << "::" << ClassName
656 << "(const MCRegisterDesc *D, const TargetRegisterInfoDesc *ID, "
657 << "int CallFrameSetupOpcode, int CallFrameDestroyOpcode)\n"
658 << " : TargetRegisterInfo(ID"
659 << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n"
660 << " SubRegIndexTable,\n"
661 << " CallFrameSetupOpcode, CallFrameDestroyOpcode) {\n"
662 << " InitMCRegisterInfo(D, " << Regs.size()+1 << ");\n"
665 // Collect all information about dwarf register numbers
666 typedef std::map<Record*, std::vector<int64_t>, LessRecord> DwarfRegNumsMapTy;
667 DwarfRegNumsMapTy DwarfRegNums;
669 // First, just pull all provided information to the map
670 unsigned maxLength = 0;
671 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
672 Record *Reg = Regs[i]->TheDef;
673 std::vector<int64_t> RegNums = Reg->getValueAsListOfInts("DwarfNumbers");
674 maxLength = std::max((size_t)maxLength, RegNums.size());
675 if (DwarfRegNums.count(Reg))
676 errs() << "Warning: DWARF numbers for register " << getQualifiedName(Reg)
677 << "specified multiple times\n";
678 DwarfRegNums[Reg] = RegNums;
681 // Now we know maximal length of number list. Append -1's, where needed
682 for (DwarfRegNumsMapTy::iterator
683 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I)
684 for (unsigned i = I->second.size(), e = maxLength; i != e; ++i)
685 I->second.push_back(-1);
687 // Emit reverse information about the dwarf register numbers.
688 OS << "int " << ClassName << "::getLLVMRegNumFull(unsigned DwarfRegNum, "
689 << "unsigned Flavour) const {\n"
690 << " switch (Flavour) {\n"
692 << " assert(0 && \"Unknown DWARF flavour\");\n"
695 for (unsigned i = 0, e = maxLength; i != e; ++i) {
696 OS << " case " << i << ":\n"
697 << " switch (DwarfRegNum) {\n"
699 << " assert(0 && \"Invalid DwarfRegNum\");\n"
702 for (DwarfRegNumsMapTy::iterator
703 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
704 int DwarfRegNo = I->second[i];
706 OS << " case " << DwarfRegNo << ":\n"
707 << " return " << getQualifiedName(I->first) << ";\n";
714 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
715 Record *Reg = Regs[i]->TheDef;
716 const RecordVal *V = Reg->getValue("DwarfAlias");
717 if (!V || !V->getValue())
720 DefInit *DI = dynamic_cast<DefInit*>(V->getValue());
721 Record *Alias = DI->getDef();
722 DwarfRegNums[Reg] = DwarfRegNums[Alias];
725 // Emit information about the dwarf register numbers.
726 OS << "int " << ClassName << "::getDwarfRegNumFull(unsigned RegNum, "
727 << "unsigned Flavour) const {\n"
728 << " switch (Flavour) {\n"
730 << " assert(0 && \"Unknown DWARF flavour\");\n"
733 for (unsigned i = 0, e = maxLength; i != e; ++i) {
734 OS << " case " << i << ":\n"
735 << " switch (RegNum) {\n"
737 << " assert(0 && \"Invalid RegNum\");\n"
740 // Sort by name to get a stable order.
743 for (DwarfRegNumsMapTy::iterator
744 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
745 int RegNo = I->second[i];
746 OS << " case " << getQualifiedName(I->first) << ":\n"
747 << " return " << RegNo << ";\n";
754 OS << "} // End llvm namespace \n";
755 OS << "#endif // GET_REGINFO_TARGET_DESC\n\n";
758 void RegisterInfoEmitter::run(raw_ostream &OS) {
759 CodeGenTarget Target(Records);
760 CodeGenRegBank &RegBank = Target.getRegBank();
761 RegBank.computeDerivedInfo();
763 runEnums(OS, Target, RegBank);
764 runMCDesc(OS, Target, RegBank);
765 runTargetHeader(OS, Target, RegBank);
766 runTargetDesc(OS, Target, RegBank);