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<Record*> &SubRegIndices = Bank.getSubRegIndices();
57 if (!SubRegIndices.empty()) {
58 OS << "\n// Subregister indices\n";
59 Namespace = SubRegIndices[0]->getValueAsString("Namespace");
60 if (!Namespace.empty())
61 OS << "namespace " << Namespace << " {\n";
62 OS << "enum {\n NoSubRegister,\n";
63 for (unsigned i = 0, e = Bank.getNumNamedIndices(); i != e; ++i)
64 OS << " " << SubRegIndices[i]->getName() << ",\t// " << i+1 << "\n";
65 OS << " NUM_TARGET_NAMED_SUBREGS = " << SubRegIndices.size()+1 << "\n";
67 if (!Namespace.empty())
71 const std::vector<CodeGenRegisterClass> &RegisterClasses =
72 Target.getRegisterClasses();
74 if (!RegisterClasses.empty()) {
75 OS << "\n// Register classes\n";
76 OS << "namespace " << RegisterClasses[0].Namespace << " {\n";
78 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
80 OS << " " << RegisterClasses[i].getName() << "RegClassID";
87 OS << "} // End llvm namespace \n";
88 OS << "#endif // GET_REGINFO_ENUM\n\n";
91 void RegisterInfoEmitter::runHeader(raw_ostream &OS, CodeGenTarget &Target) {
92 EmitSourceFileHeader("Register Information Header Fragment", OS);
94 OS << "\n#ifdef GET_REGINFO_HEADER\n";
95 OS << "#undef GET_REGINFO_HEADER\n";
97 const std::string &TargetName = Target.getName();
98 std::string ClassName = TargetName + "GenRegisterInfo";
100 OS << "#include \"llvm/Target/TargetRegisterInfo.h\"\n";
101 OS << "#include <string>\n\n";
103 OS << "namespace llvm {\n\n";
105 OS << "struct " << ClassName << " : public TargetRegisterInfo {\n"
106 << " explicit " << ClassName
107 << "(const MCRegisterDesc *D, const TargetRegisterInfoDesc *ID, "
108 << "int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n"
109 << " virtual int getDwarfRegNumFull(unsigned RegNum, "
110 << "unsigned Flavour) const;\n"
111 << " virtual int getLLVMRegNumFull(unsigned DwarfRegNum, "
112 << "unsigned Flavour) const;\n"
113 << " virtual int getDwarfRegNum(unsigned RegNum, bool isEH) const = 0;\n"
114 << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
115 << " { return false; }\n"
116 << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
117 << " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
118 << " unsigned composeSubRegIndices(unsigned, unsigned) const;\n"
121 const std::vector<CodeGenRegisterClass> &RegisterClasses =
122 Target.getRegisterClasses();
124 if (!RegisterClasses.empty()) {
125 OS << "namespace " << RegisterClasses[0].Namespace
126 << " { // Register classes\n";
128 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
129 const CodeGenRegisterClass &RC = RegisterClasses[i];
130 const std::string &Name = RC.getName();
132 // Output the register class definition.
133 OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
134 << " " << Name << "Class();\n";
135 if (!RC.AltOrderSelect.empty())
136 OS << " ArrayRef<unsigned> "
137 "getRawAllocationOrder(const MachineFunction&) const;\n";
140 // Output the extern for the instance.
141 OS << " extern " << Name << "Class\t" << Name << "RegClass;\n";
142 // Output the extern for the pointer to the instance (should remove).
143 OS << " static TargetRegisterClass * const "<< Name <<"RegisterClass = &"
144 << Name << "RegClass;\n";
146 OS << "} // end of namespace " << TargetName << "\n\n";
148 OS << "} // End llvm namespace \n";
149 OS << "#endif // GET_REGINFO_HEADER\n\n";
153 // runMCDesc - Print out MC register descriptions.
156 RegisterInfoEmitter::runMCDesc(raw_ostream &OS, CodeGenTarget &Target,
157 CodeGenRegBank &RegBank) {
158 EmitSourceFileHeader("MC Register Information", OS);
160 OS << "\n#ifdef GET_REGINFO_MC_DESC\n";
161 OS << "#undef GET_REGINFO_MC_DESC\n";
163 std::map<const CodeGenRegister*, CodeGenRegister::Set> Overlaps;
164 RegBank.computeOverlaps(Overlaps);
166 OS << "namespace llvm {\n\n";
168 const std::string &TargetName = Target.getName();
169 std::string ClassName = TargetName + "GenMCRegisterInfo";
170 OS << "struct " << ClassName << " : public MCRegisterInfo {\n"
171 << " explicit " << ClassName << "(const MCRegisterDesc *D);\n";
174 OS << "\nnamespace {\n";
176 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
178 // Emit an overlap list for all registers.
179 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
180 const CodeGenRegister *Reg = Regs[i];
181 const CodeGenRegister::Set &O = Overlaps[Reg];
182 // Move Reg to the front so TRI::getAliasSet can share the list.
183 OS << " const unsigned " << Reg->getName() << "_Overlaps[] = { "
184 << getQualifiedName(Reg->TheDef) << ", ";
185 for (CodeGenRegister::Set::const_iterator I = O.begin(), E = O.end();
188 OS << getQualifiedName((*I)->TheDef) << ", ";
192 // Emit the empty sub-registers list
193 OS << " const unsigned Empty_SubRegsSet[] = { 0 };\n";
194 // Loop over all of the registers which have sub-registers, emitting the
195 // sub-registers list to memory.
196 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
197 const CodeGenRegister &Reg = *Regs[i];
198 if (Reg.getSubRegs().empty())
200 // getSubRegs() orders by SubRegIndex. We want a topological order.
201 SetVector<CodeGenRegister*> SR;
202 Reg.addSubRegsPreOrder(SR);
203 OS << " const unsigned " << Reg.getName() << "_SubRegsSet[] = { ";
204 for (unsigned j = 0, je = SR.size(); j != je; ++j)
205 OS << getQualifiedName(SR[j]->TheDef) << ", ";
209 // Emit the empty super-registers list
210 OS << " const unsigned Empty_SuperRegsSet[] = { 0 };\n";
211 // Loop over all of the registers which have super-registers, emitting the
212 // super-registers list to memory.
213 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
214 const CodeGenRegister &Reg = *Regs[i];
215 const CodeGenRegister::SuperRegList &SR = Reg.getSuperRegs();
218 OS << " const unsigned " << Reg.getName() << "_SuperRegsSet[] = { ";
219 for (unsigned j = 0, je = SR.size(); j != je; ++j)
220 OS << getQualifiedName(SR[j]->TheDef) << ", ";
224 OS << "\n const MCRegisterDesc " << TargetName
225 << "RegDesc[] = { // Descriptors\n";
226 OS << " { \"NOREG\",\t0,\t0,\t0 },\n";
228 // Now that register alias and sub-registers sets have been emitted, emit the
229 // register descriptors now.
230 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
231 const CodeGenRegister &Reg = *Regs[i];
233 OS << Reg.getName() << "\",\t" << Reg.getName() << "_Overlaps,\t";
234 if (!Reg.getSubRegs().empty())
235 OS << Reg.getName() << "_SubRegsSet,\t";
237 OS << "Empty_SubRegsSet,\t";
238 if (!Reg.getSuperRegs().empty())
239 OS << Reg.getName() << "_SuperRegsSet";
241 OS << "Empty_SuperRegsSet";
244 OS << " };\n"; // End of register descriptors...
246 OS << "}\n\n"; // End of anonymous namespace...
248 // MCRegisterInfo initialization routine.
249 OS << "static inline void Init" << TargetName
250 << "MCRegisterInfo(MCRegisterInfo *RI) {\n";
251 OS << " RI->InitMCRegisterInfo(" << TargetName << "RegDesc, "
252 << Regs.size()+1 << ");\n}\n\n";
254 OS << "} // End llvm namespace \n";
255 OS << "#endif // GET_REGINFO_MC_DESC\n\n";
259 // runTargetDesc - Output the target register and register file descriptions.
262 RegisterInfoEmitter::runTargetDesc(raw_ostream &OS, CodeGenTarget &Target,
263 CodeGenRegBank &RegBank){
264 EmitSourceFileHeader("Target Register and Register Classes Information", OS);
266 OS << "\n#ifdef GET_REGINFO_TARGET_DESC\n";
267 OS << "#undef GET_REGINFO_TARGET_DESC\n";
269 OS << "namespace llvm {\n\n";
271 // Start out by emitting each of the register classes.
272 const std::vector<CodeGenRegisterClass> &RegisterClasses =
273 Target.getRegisterClasses();
275 // Collect all registers belonging to any allocatable class.
276 std::set<Record*> AllocatableRegs;
278 // Loop over all of the register classes... emitting each one.
279 OS << "namespace { // Register classes...\n";
281 // Emit the register enum value arrays for each RegisterClass
282 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
283 const CodeGenRegisterClass &RC = RegisterClasses[rc];
284 ArrayRef<Record*> Order = RC.getOrder();
286 // Collect allocatable registers.
288 AllocatableRegs.insert(Order.begin(), Order.end());
290 // Give the register class a legal C name if it's anonymous.
291 std::string Name = RC.getName();
293 // Emit the register list now.
294 OS << " // " << Name << " Register Class...\n"
295 << " static const unsigned " << Name
297 for (unsigned i = 0, e = Order.size(); i != e; ++i) {
298 Record *Reg = Order[i];
299 OS << getQualifiedName(Reg) << ", ";
304 // Emit the ValueType arrays for each RegisterClass
305 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
306 const CodeGenRegisterClass &RC = RegisterClasses[rc];
308 // Give the register class a legal C name if it's anonymous.
309 std::string Name = RC.getName() + "VTs";
311 // Emit the register list now.
313 << " Register Class Value Types...\n"
314 << " static const EVT " << Name
316 for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
317 OS << getEnumName(RC.VTs[i]) << ", ";
318 OS << "MVT::Other\n };\n\n";
320 OS << "} // end anonymous namespace\n\n";
322 // Now that all of the structs have been emitted, emit the instances.
323 if (!RegisterClasses.empty()) {
324 OS << "namespace " << RegisterClasses[0].Namespace
325 << " { // Register class instances\n";
326 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
327 OS << " " << RegisterClasses[i].getName() << "Class\t"
328 << RegisterClasses[i].getName() << "RegClass;\n";
330 std::map<unsigned, std::set<unsigned> > SuperClassMap;
331 std::map<unsigned, std::set<unsigned> > SuperRegClassMap;
334 unsigned NumSubRegIndices = RegBank.getSubRegIndices().size();
336 if (NumSubRegIndices) {
337 // Emit the sub-register classes for each RegisterClass
338 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
339 const CodeGenRegisterClass &RC = RegisterClasses[rc];
340 std::vector<Record*> SRC(NumSubRegIndices);
341 for (DenseMap<Record*,Record*>::const_iterator
342 i = RC.SubRegClasses.begin(),
343 e = RC.SubRegClasses.end(); i != e; ++i) {
345 unsigned idx = RegBank.getSubRegIndexNo(i->first);
346 SRC.at(idx-1) = i->second;
348 // Find the register class number of i->second for SuperRegClassMap.
349 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
350 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
351 if (RC2.TheDef == i->second) {
352 SuperRegClassMap[rc2].insert(rc);
358 // Give the register class a legal C name if it's anonymous.
359 std::string Name = RC.TheDef->getName();
362 << " Sub-register Classes...\n"
363 << " static const TargetRegisterClass* const "
364 << Name << "SubRegClasses[] = {\n ";
366 for (unsigned idx = 0; idx != NumSubRegIndices; ++idx) {
370 OS << "&" << getQualifiedName(SRC[idx]) << "RegClass";
377 // Emit the super-register classes for each RegisterClass
378 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
379 const CodeGenRegisterClass &RC = RegisterClasses[rc];
381 // Give the register class a legal C name if it's anonymous.
382 std::string Name = RC.TheDef->getName();
385 << " Super-register Classes...\n"
386 << " static const TargetRegisterClass* const "
387 << Name << "SuperRegClasses[] = {\n ";
390 std::map<unsigned, std::set<unsigned> >::iterator I =
391 SuperRegClassMap.find(rc);
392 if (I != SuperRegClassMap.end()) {
393 for (std::set<unsigned>::iterator II = I->second.begin(),
394 EE = I->second.end(); II != EE; ++II) {
395 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
398 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
403 OS << (!Empty ? ", " : "") << "NULL";
407 // No subregindices in this target
408 OS << " static const TargetRegisterClass* const "
409 << "NullRegClasses[] = { NULL };\n\n";
412 // Emit the sub-classes array for each RegisterClass
413 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
414 const CodeGenRegisterClass &RC = RegisterClasses[rc];
416 // Give the register class a legal C name if it's anonymous.
417 std::string Name = RC.TheDef->getName();
420 << " Register Class sub-classes...\n"
421 << " static const TargetRegisterClass* const "
422 << Name << "Subclasses[] = {\n ";
425 for (unsigned rc2 = 0, e2 = RegisterClasses.size(); rc2 != e2; ++rc2) {
426 const CodeGenRegisterClass &RC2 = RegisterClasses[rc2];
428 // Sub-classes are used to determine if a virtual register can be used
429 // as an instruction operand, or if it must be copied first.
430 if (rc == rc2 || !RC.hasSubClass(&RC2)) continue;
432 if (!Empty) OS << ", ";
433 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
436 std::map<unsigned, std::set<unsigned> >::iterator SCMI =
437 SuperClassMap.find(rc2);
438 if (SCMI == SuperClassMap.end()) {
439 SuperClassMap.insert(std::make_pair(rc2, std::set<unsigned>()));
440 SCMI = SuperClassMap.find(rc2);
442 SCMI->second.insert(rc);
445 OS << (!Empty ? ", " : "") << "NULL";
449 for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
450 const CodeGenRegisterClass &RC = RegisterClasses[rc];
452 // Give the register class a legal C name if it's anonymous.
453 std::string Name = RC.TheDef->getName();
456 << " Register Class super-classes...\n"
457 << " static const TargetRegisterClass* const "
458 << Name << "Superclasses[] = {\n ";
461 std::map<unsigned, std::set<unsigned> >::iterator I =
462 SuperClassMap.find(rc);
463 if (I != SuperClassMap.end()) {
464 for (std::set<unsigned>::iterator II = I->second.begin(),
465 EE = I->second.end(); II != EE; ++II) {
466 const CodeGenRegisterClass &RC2 = RegisterClasses[*II];
467 if (!Empty) OS << ", ";
468 OS << "&" << getQualifiedName(RC2.TheDef) << "RegClass";
473 OS << (!Empty ? ", " : "") << "NULL";
478 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i) {
479 const CodeGenRegisterClass &RC = RegisterClasses[i];
480 OS << RC.getName() << "Class::" << RC.getName()
481 << "Class() : TargetRegisterClass("
482 << RC.getName() + "RegClassID" << ", "
483 << '\"' << RC.getName() << "\", "
484 << RC.getName() + "VTs" << ", "
485 << RC.getName() + "Subclasses" << ", "
486 << RC.getName() + "Superclasses" << ", "
487 << (NumSubRegIndices ? RC.getName() + "Sub" : std::string("Null"))
489 << (NumSubRegIndices ? RC.getName() + "Super" : std::string("Null"))
491 << RC.SpillSize/8 << ", "
492 << RC.SpillAlignment/8 << ", "
493 << RC.CopyCost << ", "
494 << RC.Allocatable << ", "
495 << RC.getName() << ", " << RC.getName() << " + "
496 << RC.getOrder().size()
498 if (!RC.AltOrderSelect.empty()) {
499 OS << "\nstatic inline unsigned " << RC.getName()
500 << "AltOrderSelect(const MachineFunction &MF) {"
501 << RC.AltOrderSelect << "}\n\nArrayRef<unsigned> "
502 << RC.getName() << "Class::"
503 << "getRawAllocationOrder(const MachineFunction &MF) const {\n";
504 for (unsigned oi = 1 , oe = RC.getNumOrders(); oi != oe; ++oi) {
505 ArrayRef<Record*> Elems = RC.getOrder(oi);
506 OS << " static const unsigned AltOrder" << oi << "[] = {";
507 for (unsigned elem = 0; elem != Elems.size(); ++elem)
508 OS << (elem ? ", " : " ") << getQualifiedName(Elems[elem]);
511 OS << " static const ArrayRef<unsigned> Order[] = {\n"
512 << " ArrayRef<unsigned>(" << RC.getName();
513 for (unsigned oi = 1, oe = RC.getNumOrders(); oi != oe; ++oi)
514 OS << "),\n ArrayRef<unsigned>(AltOrder" << oi;
515 OS << ")\n };\n const unsigned Select = " << RC.getName()
516 << "AltOrderSelect(MF);\n assert(Select < " << RC.getNumOrders()
517 << ");\n return Order[Select];\n}\n";
524 OS << "\nnamespace {\n";
525 OS << " const TargetRegisterClass* const RegisterClasses[] = {\n";
526 for (unsigned i = 0, e = RegisterClasses.size(); i != e; ++i)
527 OS << " &" << getQualifiedName(RegisterClasses[i].TheDef)
531 // Emit extra information about registers.
532 OS << "\n static const TargetRegisterInfoDesc "
533 << Target.getName() << "RegInfoDesc[] = "
534 << "{ // Extra Descriptors\n";
535 OS << " { 0, 0 },\n";
537 const std::vector<CodeGenRegister*> &Regs = RegBank.getRegisters();
538 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
539 const CodeGenRegister &Reg = *Regs[i];
541 OS << Reg.CostPerUse << ", "
542 << int(AllocatableRegs.count(Reg.TheDef)) << " },\n";
544 OS << " };\n"; // End of register descriptors...
547 // Calculate the mapping of subregister+index pairs to physical registers.
548 // This will also create further anonymous indexes.
549 unsigned NamedIndices = RegBank.getNumNamedIndices();
551 // Emit SubRegIndex names, skipping 0
552 const std::vector<Record*> &SubRegIndices = RegBank.getSubRegIndices();
553 OS << "\n const char *const SubRegIndexTable[] = { \"";
554 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
555 OS << SubRegIndices[i]->getName();
561 // Emit names of the anonymus subreg indexes.
562 if (SubRegIndices.size() > NamedIndices) {
564 for (unsigned i = NamedIndices, e = SubRegIndices.size(); i != e; ++i) {
565 OS << "\n " << SubRegIndices[i]->getName() << " = " << i+1;
571 OS << "}\n\n"; // End of anonymous namespace...
573 std::string ClassName = Target.getName() + "GenRegisterInfo";
575 // Emit the subregister + index mapping function based on the information
577 OS << "unsigned " << ClassName
578 << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
579 << " switch (RegNo) {\n"
580 << " default:\n return 0;\n";
581 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
582 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
585 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
586 OS << " switch (Index) {\n";
587 OS << " default: return 0;\n";
588 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
589 ie = SRM.end(); ii != ie; ++ii)
590 OS << " case " << getQualifiedName(ii->first)
591 << ": return " << getQualifiedName(ii->second->TheDef) << ";\n";
592 OS << " };\n" << " break;\n";
595 OS << " return 0;\n";
598 OS << "unsigned " << ClassName
599 << "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"
600 << " switch (RegNo) {\n"
601 << " default:\n return 0;\n";
602 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
603 const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
606 OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
607 for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
608 ie = SRM.end(); ii != ie; ++ii)
609 OS << " if (SubRegNo == " << getQualifiedName(ii->second->TheDef)
610 << ") return " << getQualifiedName(ii->first) << ";\n";
611 OS << " return 0;\n";
614 OS << " return 0;\n";
617 // Emit composeSubRegIndices
618 OS << "unsigned " << ClassName
619 << "::composeSubRegIndices(unsigned IdxA, unsigned IdxB) const {\n"
620 << " switch (IdxA) {\n"
621 << " default:\n return IdxB;\n";
622 for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i) {
624 for (unsigned j = 0; j != e; ++j) {
625 if (Record *Comp = RegBank.getCompositeSubRegIndex(SubRegIndices[i],
628 OS << " case " << getQualifiedName(SubRegIndices[i])
629 << ": switch(IdxB) {\n default: return IdxB;\n";
632 OS << " case " << getQualifiedName(SubRegIndices[j])
633 << ": return " << getQualifiedName(Comp) << ";\n";
641 // Emit the constructor of the class...
642 OS << ClassName << "::" << ClassName
643 << "(const MCRegisterDesc *D, const TargetRegisterInfoDesc *ID, "
644 << "int CallFrameSetupOpcode, int CallFrameDestroyOpcode)\n"
645 << " : TargetRegisterInfo(ID"
646 << ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n"
647 << " SubRegIndexTable,\n"
648 << " CallFrameSetupOpcode, CallFrameDestroyOpcode) {\n"
649 << " InitMCRegisterInfo(D, " << Regs.size()+1 << ");\n"
652 // Collect all information about dwarf register numbers
653 typedef std::map<Record*, std::vector<int64_t>, LessRecord> DwarfRegNumsMapTy;
654 DwarfRegNumsMapTy DwarfRegNums;
656 // First, just pull all provided information to the map
657 unsigned maxLength = 0;
658 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
659 Record *Reg = Regs[i]->TheDef;
660 std::vector<int64_t> RegNums = Reg->getValueAsListOfInts("DwarfNumbers");
661 maxLength = std::max((size_t)maxLength, RegNums.size());
662 if (DwarfRegNums.count(Reg))
663 errs() << "Warning: DWARF numbers for register " << getQualifiedName(Reg)
664 << "specified multiple times\n";
665 DwarfRegNums[Reg] = RegNums;
668 // Now we know maximal length of number list. Append -1's, where needed
669 for (DwarfRegNumsMapTy::iterator
670 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I)
671 for (unsigned i = I->second.size(), e = maxLength; i != e; ++i)
672 I->second.push_back(-1);
674 // Emit reverse information about the dwarf register numbers.
675 OS << "int " << ClassName << "::getLLVMRegNumFull(unsigned DwarfRegNum, "
676 << "unsigned Flavour) const {\n"
677 << " switch (Flavour) {\n"
679 << " assert(0 && \"Unknown DWARF flavour\");\n"
682 for (unsigned i = 0, e = maxLength; i != e; ++i) {
683 OS << " case " << i << ":\n"
684 << " switch (DwarfRegNum) {\n"
686 << " assert(0 && \"Invalid DwarfRegNum\");\n"
689 for (DwarfRegNumsMapTy::iterator
690 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
691 int DwarfRegNo = I->second[i];
693 OS << " case " << DwarfRegNo << ":\n"
694 << " return " << getQualifiedName(I->first) << ";\n";
701 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
702 Record *Reg = Regs[i]->TheDef;
703 const RecordVal *V = Reg->getValue("DwarfAlias");
704 if (!V || !V->getValue())
707 DefInit *DI = dynamic_cast<DefInit*>(V->getValue());
708 Record *Alias = DI->getDef();
709 DwarfRegNums[Reg] = DwarfRegNums[Alias];
712 // Emit information about the dwarf register numbers.
713 OS << "int " << ClassName << "::getDwarfRegNumFull(unsigned RegNum, "
714 << "unsigned Flavour) const {\n"
715 << " switch (Flavour) {\n"
717 << " assert(0 && \"Unknown DWARF flavour\");\n"
720 for (unsigned i = 0, e = maxLength; i != e; ++i) {
721 OS << " case " << i << ":\n"
722 << " switch (RegNum) {\n"
724 << " assert(0 && \"Invalid RegNum\");\n"
727 // Sort by name to get a stable order.
730 for (DwarfRegNumsMapTy::iterator
731 I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
732 int RegNo = I->second[i];
733 OS << " case " << getQualifiedName(I->first) << ":\n"
734 << " return " << RegNo << ";\n";
741 OS << "} // End llvm namespace \n";
742 OS << "#endif // GET_REGINFO_TARGET_DESC\n\n";
745 void RegisterInfoEmitter::run(raw_ostream &OS) {
746 CodeGenTarget Target(Records);
747 CodeGenRegBank &RegBank = Target.getRegBank();
748 RegBank.computeDerivedInfo();
750 runEnums(OS, Target, RegBank);
751 runHeader(OS, Target);
752 runMCDesc(OS, Target, RegBank);
753 runTargetDesc(OS, Target, RegBank);