utils/TableGen/Record.cpp

   1 //===- Record.cpp - Record implementation ---------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // Implement the tablegen record classes.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "Record.h"
  15 #include "llvm/System/DataTypes.h"
  16 #include "llvm/Support/Format.h"
  17 #include "llvm/ADT/StringExtras.h"
  18
  19 using namespace llvm;
  20
  21 //===----------------------------------------------------------------------===//
  22 //    Type implementations
  23 //===----------------------------------------------------------------------===//
  24
  25 void RecTy::dump() const { print(errs()); }
  26
  27 Init *BitRecTy::convertValue(BitsInit *BI) {
  28   if (BI->getNumBits() != 1) return 0; // Only accept if just one bit!
  29   return BI->getBit(0);
  30 }
  31
  32 bool BitRecTy::baseClassOf(const BitsRecTy *RHS) const {
  33   return RHS->getNumBits() == 1;
  34 }
  35
  36 Init *BitRecTy::convertValue(IntInit *II) {
  37   int64_t Val = II->getValue();
  38   if (Val != 0 && Val != 1) return 0;  // Only accept 0 or 1 for a bit!
  39
  40   return new BitInit(Val != 0);
  41 }
  42
  43 Init *BitRecTy::convertValue(TypedInit *VI) {
  44   if (dynamic_cast<BitRecTy*>(VI->getType()))
  45     return VI;  // Accept variable if it is already of bit type!
  46   return 0;
  47 }
  48
  49 std::string BitsRecTy::getAsString() const {
  50   return "bits<" + utostr(Size) + ">";
  51 }
  52
  53 Init *BitsRecTy::convertValue(UnsetInit *UI) {
  54   BitsInit *Ret = new BitsInit(Size);
  55
  56   for (unsigned i = 0; i != Size; ++i)
  57     Ret->setBit(i, new UnsetInit());
  58   return Ret;
  59 }
  60
  61 Init *BitsRecTy::convertValue(BitInit *UI) {
  62   if (Size != 1) return 0;  // Can only convert single bit...
  63   BitsInit *Ret = new BitsInit(1);
  64   Ret->setBit(0, UI);
  65   return Ret;
  66 }
  67
  68 // convertValue from Int initializer to bits type: Split the integer up into the
  69 // appropriate bits...
  70 //
  71 Init *BitsRecTy::convertValue(IntInit *II) {
  72   int64_t Value = II->getValue();
  73   // Make sure this bitfield is large enough to hold the integer value...
  74   if (Value >= 0) {
  75     if (Value & ~((1LL << Size)-1))
  76       return 0;
  77   } else {
  78     if ((Value >> Size) != -1 || ((Value & (1LL << (Size-1))) == 0))
  79       return 0;
  80   }
  81
  82   BitsInit *Ret = new BitsInit(Size);
  83   for (unsigned i = 0; i != Size; ++i)
  84     Ret->setBit(i, new BitInit(Value & (1LL << i)));
  85
  86   return Ret;
  87 }
  88
  89 Init *BitsRecTy::convertValue(BitsInit *BI) {
  90   // If the number of bits is right, return it.  Otherwise we need to expand or
  91   // truncate...
  92   if (BI->getNumBits() == Size) return BI;
  93   return 0;
  94 }
  95
  96 Init *BitsRecTy::convertValue(TypedInit *VI) {
  97   if (BitsRecTy *BRT = dynamic_cast<BitsRecTy*>(VI->getType()))
  98     if (BRT->Size == Size) {
  99       BitsInit *Ret = new BitsInit(Size);
 100       for (unsigned i = 0; i != Size; ++i)
 101         Ret->setBit(i, new VarBitInit(VI, i));
 102       return Ret;
 103     }
 104   if (Size == 1 && dynamic_cast<BitRecTy*>(VI->getType())) {
 105     BitsInit *Ret = new BitsInit(1);
 106     Ret->setBit(0, VI);
 107     return Ret;
 108   }
 109
 110   return 0;
 111 }
 112
 113 Init *IntRecTy::convertValue(BitInit *BI) {
 114   return new IntInit(BI->getValue());
 115 }
 116
 117 Init *IntRecTy::convertValue(BitsInit *BI) {
 118   int64_t Result = 0;
 119   for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
 120     if (BitInit *Bit = dynamic_cast<BitInit*>(BI->getBit(i))) {
 121       Result |= Bit->getValue() << i;
 122     } else {
 123       return 0;
 124     }
 125   return new IntInit(Result);
 126 }
 127
 128 Init *IntRecTy::convertValue(TypedInit *TI) {
 129   if (TI->getType()->typeIsConvertibleTo(this))
 130     return TI;  // Accept variable if already of the right type!
 131   return 0;
 132 }
 133
 134 Init *StringRecTy::convertValue(UnOpInit *BO) {
 135   if (BO->getOpcode() == UnOpInit::CAST) {
 136     Init *L = BO->getOperand()->convertInitializerTo(this);
 137     if (L == 0) return 0;
 138     if (L != BO->getOperand())
 139       return new UnOpInit(UnOpInit::CAST, L, new StringRecTy);
 140     return BO;
 141   }
 142
 143   return convertValue((TypedInit*)BO);
 144 }
 145
 146 Init *StringRecTy::convertValue(BinOpInit *BO) {
 147   if (BO->getOpcode() == BinOpInit::STRCONCAT) {
 148     Init *L = BO->getLHS()->convertInitializerTo(this);
 149     Init *R = BO->getRHS()->convertInitializerTo(this);
 150     if (L == 0 || R == 0) return 0;
 151     if (L != BO->getLHS() || R != BO->getRHS())
 152       return new BinOpInit(BinOpInit::STRCONCAT, L, R, new StringRecTy);
 153     return BO;
 154   }
 155   if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
 156     if (BO->getType()->getAsString() == getAsString()) {
 157       Init *L = BO->getLHS()->convertInitializerTo(this);
 158       Init *R = BO->getRHS()->convertInitializerTo(this);
 159       if (L == 0 || R == 0) return 0;
 160       if (L != BO->getLHS() || R != BO->getRHS())
 161         return new BinOpInit(BinOpInit::NAMECONCAT, L, R, new StringRecTy);
 162       return BO;
 163     }
 164   }
 165
 166   return convertValue((TypedInit*)BO);
 167 }
 168
 169
 170 Init *StringRecTy::convertValue(TypedInit *TI) {
 171   if (dynamic_cast<StringRecTy*>(TI->getType()))
 172     return TI;  // Accept variable if already of the right type!
 173   return 0;
 174 }
 175
 176 std::string ListRecTy::getAsString() const {
 177   return "list<" + Ty->getAsString() + ">";
 178 }
 179
 180 Init *ListRecTy::convertValue(ListInit *LI) {
 181   std::vector<Init*> Elements;
 182
 183   // Verify that all of the elements of the list are subclasses of the
 184   // appropriate class!
 185   for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
 186     if (Init *CI = LI->getElement(i)->convertInitializerTo(Ty))
 187       Elements.push_back(CI);
 188     else
 189       return 0;
 190
 191   ListRecTy *LType = dynamic_cast<ListRecTy*>(LI->getType());
 192   if (LType == 0) {
 193     return 0;
 194   }
 195
 196   return new ListInit(Elements, new ListRecTy(Ty));
 197 }
 198
 199 Init *ListRecTy::convertValue(TypedInit *TI) {
 200   // Ensure that TI is compatible with our class.
 201   if (ListRecTy *LRT = dynamic_cast<ListRecTy*>(TI->getType()))
 202     if (LRT->getElementType()->typeIsConvertibleTo(getElementType()))
 203       return TI;
 204   return 0;
 205 }
 206
 207 Init *CodeRecTy::convertValue(TypedInit *TI) {
 208   if (TI->getType()->typeIsConvertibleTo(this))
 209     return TI;
 210   return 0;
 211 }
 212
 213 Init *DagRecTy::convertValue(TypedInit *TI) {
 214   if (TI->getType()->typeIsConvertibleTo(this))
 215     return TI;
 216   return 0;
 217 }
 218
 219 Init *DagRecTy::convertValue(UnOpInit *BO) {
 220   if (BO->getOpcode() == UnOpInit::CAST) {
 221     Init *L = BO->getOperand()->convertInitializerTo(this);
 222     if (L == 0) return 0;
 223     if (L != BO->getOperand())
 224       return new UnOpInit(UnOpInit::CAST, L, new DagRecTy);
 225     return BO;
 226   }
 227   return 0;
 228 }
 229
 230 Init *DagRecTy::convertValue(BinOpInit *BO) {
 231   if (BO->getOpcode() == BinOpInit::CONCAT) {
 232     Init *L = BO->getLHS()->convertInitializerTo(this);
 233     Init *R = BO->getRHS()->convertInitializerTo(this);
 234     if (L == 0 || R == 0) return 0;
 235     if (L != BO->getLHS() || R != BO->getRHS())
 236       return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
 237     return BO;
 238   }
 239   if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
 240     if (BO->getType()->getAsString() == getAsString()) {
 241       Init *L = BO->getLHS()->convertInitializerTo(this);
 242       Init *R = BO->getRHS()->convertInitializerTo(this);
 243       if (L == 0 || R == 0) return 0;
 244       if (L != BO->getLHS() || R != BO->getRHS())
 245         return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
 246       return BO;
 247     }
 248   }
 249   return 0;
 250 }
 251
 252 std::string RecordRecTy::getAsString() const {
 253   return Rec->getName();
 254 }
 255
 256 Init *RecordRecTy::convertValue(DefInit *DI) {
 257   // Ensure that DI is a subclass of Rec.
 258   if (!DI->getDef()->isSubClassOf(Rec))
 259     return 0;
 260   return DI;
 261 }
 262
 263 Init *RecordRecTy::convertValue(TypedInit *TI) {
 264   // Ensure that TI is compatible with Rec.
 265   if (RecordRecTy *RRT = dynamic_cast<RecordRecTy*>(TI->getType()))
 266     if (RRT->getRecord()->isSubClassOf(getRecord()) ||
 267         RRT->getRecord() == getRecord())
 268       return TI;
 269   return 0;
 270 }
 271
 272 bool RecordRecTy::baseClassOf(const RecordRecTy *RHS) const {
 273   return Rec == RHS->getRecord() || RHS->getRecord()->isSubClassOf(Rec);
 274 }
 275
 276
 277 /// resolveTypes - Find a common type that T1 and T2 convert to.
 278 /// Return 0 if no such type exists.
 279 ///
 280 RecTy *llvm::resolveTypes(RecTy *T1, RecTy *T2) {
 281   if (!T1->typeIsConvertibleTo(T2)) {
 282     if (!T2->typeIsConvertibleTo(T1)) {
 283       // If one is a Record type, check superclasses
 284       RecordRecTy *RecTy1 = dynamic_cast<RecordRecTy*>(T1);
 285       if (RecTy1) {
 286         // See if T2 inherits from a type T1 also inherits from
 287         const std::vector<Record *> &T1SuperClasses =
 288           RecTy1->getRecord()->getSuperClasses();
 289         for(std::vector<Record *>::const_iterator i = T1SuperClasses.begin(),
 290               iend = T1SuperClasses.end();
 291             i != iend;
 292             ++i) {
 293           RecordRecTy *SuperRecTy1 = new RecordRecTy(*i);
 294           RecTy *NewType1 = resolveTypes(SuperRecTy1, T2);
 295           if (NewType1 != 0) {
 296             if (NewType1 != SuperRecTy1) {
 297               delete SuperRecTy1;
 298             }
 299             return NewType1;
 300           }
 301         }
 302       }
 303       RecordRecTy *RecTy2 = dynamic_cast<RecordRecTy*>(T2);
 304       if (RecTy2) {
 305         // See if T1 inherits from a type T2 also inherits from
 306         const std::vector<Record *> &T2SuperClasses =
 307           RecTy2->getRecord()->getSuperClasses();
 308         for (std::vector<Record *>::const_iterator i = T2SuperClasses.begin(),
 309               iend = T2SuperClasses.end();
 310             i != iend;
 311             ++i) {
 312           RecordRecTy *SuperRecTy2 = new RecordRecTy(*i);
 313           RecTy *NewType2 = resolveTypes(T1, SuperRecTy2);
 314           if (NewType2 != 0) {
 315             if (NewType2 != SuperRecTy2) {
 316               delete SuperRecTy2;
 317             }
 318             return NewType2;
 319           }
 320         }
 321       }
 322       return 0;
 323     }
 324     return T2;
 325   }
 326   return T1;
 327 }
 328
 329
 330 //===----------------------------------------------------------------------===//
 331 //    Initializer implementations
 332 //===----------------------------------------------------------------------===//
 333
 334 void Init::dump() const { return print(errs()); }
 335
 336 Init *BitsInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 337   BitsInit *BI = new BitsInit(Bits.size());
 338   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 339     if (Bits[i] >= getNumBits()) {
 340       delete BI;
 341       return 0;
 342     }
 343     BI->setBit(i, getBit(Bits[i]));
 344   }
 345   return BI;
 346 }
 347
 348 std::string BitsInit::getAsString() const {
 349   std::string Result = "{ ";
 350   for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
 351     if (i) Result += ", ";
 352     if (Init *Bit = getBit(e-i-1))
 353       Result += Bit->getAsString();
 354     else
 355       Result += "*";
 356   }
 357   return Result + " }";
 358 }
 359
 360 // resolveReferences - If there are any field references that refer to fields
 361 // that have been filled in, we can propagate the values now.
 362 //
 363 Init *BitsInit::resolveReferences(Record &R, const RecordVal *RV) {
 364   bool Changed = false;
 365   BitsInit *New = new BitsInit(getNumBits());
 366
 367   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 368     Init *B;
 369     Init *CurBit = getBit(i);
 370
 371     do {
 372       B = CurBit;
 373       CurBit = CurBit->resolveReferences(R, RV);
 374       Changed |= B != CurBit;
 375     } while (B != CurBit);
 376     New->setBit(i, CurBit);
 377   }
 378
 379   if (Changed)
 380     return New;
 381   delete New;
 382   return this;
 383 }
 384
 385 std::string IntInit::getAsString() const {
 386   return itostr(Value);
 387 }
 388
 389 Init *IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 390   BitsInit *BI = new BitsInit(Bits.size());
 391
 392   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 393     if (Bits[i] >= 64) {
 394       delete BI;
 395       return 0;
 396     }
 397     BI->setBit(i, new BitInit(Value & (INT64_C(1) << Bits[i])));
 398   }
 399   return BI;
 400 }
 401
 402 Init *ListInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
 403   std::vector<Init*> Vals;
 404   for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
 405     if (Elements[i] >= getSize())
 406       return 0;
 407     Vals.push_back(getElement(Elements[i]));
 408   }
 409   return new ListInit(Vals, getType());
 410 }
 411
 412 Record *ListInit::getElementAsRecord(unsigned i) const {
 413   assert(i < Values.size() && "List element index out of range!");
 414   DefInit *DI = dynamic_cast<DefInit*>(Values[i]);
 415   if (DI == 0) throw "Expected record in list!";
 416   return DI->getDef();
 417 }
 418
 419 Init *ListInit::resolveReferences(Record &R, const RecordVal *RV) {
 420   std::vector<Init*> Resolved;
 421   Resolved.reserve(getSize());
 422   bool Changed = false;
 423
 424   for (unsigned i = 0, e = getSize(); i != e; ++i) {
 425     Init *E;
 426     Init *CurElt = getElement(i);
 427
 428     do {
 429       E = CurElt;
 430       CurElt = CurElt->resolveReferences(R, RV);
 431       Changed |= E != CurElt;
 432     } while (E != CurElt);
 433     Resolved.push_back(E);
 434   }
 435
 436   if (Changed)
 437     return new ListInit(Resolved, getType());
 438   return this;
 439 }
 440
 441 Init *ListInit::resolveListElementReference(Record &R, const RecordVal *IRV,
 442                                             unsigned Elt) {
 443   if (Elt >= getSize())
 444     return 0;  // Out of range reference.
 445   Init *E = getElement(Elt);
 446   // If the element is set to some value, or if we are resolving a reference
 447   // to a specific variable and that variable is explicitly unset, then
 448   // replace the VarListElementInit with it.
 449   if (IRV || !dynamic_cast<UnsetInit*>(E))
 450     return E;
 451   return 0;
 452 }
 453
 454 std::string ListInit::getAsString() const {
 455   std::string Result = "[";
 456   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
 457     if (i) Result += ", ";
 458     Result += Values[i]->getAsString();
 459   }
 460   return Result + "]";
 461 }
 462
 463 Init *OpInit::resolveBitReference(Record &R, const RecordVal *IRV,
 464                                   unsigned Bit) {
 465   Init *Folded = Fold(&R, 0);
 466
 467   if (Folded != this) {
 468     TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
 469     if (Typed) {
 470       return Typed->resolveBitReference(R, IRV, Bit);
 471     }
 472   }
 473
 474   return 0;
 475 }
 476
 477 Init *OpInit::resolveListElementReference(Record &R, const RecordVal *IRV,
 478                                           unsigned Elt) {
 479   Init *Folded = Fold(&R, 0);
 480
 481   if (Folded != this) {
 482     TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
 483     if (Typed) {
 484       return Typed->resolveListElementReference(R, IRV, Elt);
 485     }
 486   }
 487
 488   return 0;
 489 }
 490
 491 Init *UnOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 492   switch (getOpcode()) {
 493   default: assert(0 && "Unknown unop");
 494   case CAST: {
 495     if (getType()->getAsString() == "string") {
 496       StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 497       if (LHSs) {
 498         return LHSs;
 499       }
 500
 501       DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
 502       if (LHSd) {
 503         return new StringInit(LHSd->getDef()->getName());
 504       }
 505     } else {
 506       StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 507       if (LHSs) {
 508         std::string Name = LHSs->getValue();
 509
 510         // From TGParser::ParseIDValue
 511         if (CurRec) {
 512           if (const RecordVal *RV = CurRec->getValue(Name)) {
 513             if (RV->getType() != getType()) {
 514               throw "type mismatch in nameconcat";
 515             }
 516             return new VarInit(Name, RV->getType());
 517           }
 518
 519           std::string TemplateArgName = CurRec->getName()+":"+Name;
 520           if (CurRec->isTemplateArg(TemplateArgName)) {
 521             const RecordVal *RV = CurRec->getValue(TemplateArgName);
 522             assert(RV && "Template arg doesn't exist??");
 523
 524             if (RV->getType() != getType()) {
 525               throw "type mismatch in nameconcat";
 526             }
 527
 528             return new VarInit(TemplateArgName, RV->getType());
 529           }
 530         }
 531
 532         if (CurMultiClass) {
 533           std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
 534           if (CurMultiClass->Rec.isTemplateArg(MCName)) {
 535             const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
 536             assert(RV && "Template arg doesn't exist??");
 537
 538             if (RV->getType() != getType()) {
 539               throw "type mismatch in nameconcat";
 540             }
 541
 542             return new VarInit(MCName, RV->getType());
 543           }
 544         }
 545
 546         if (Record *D = Records.getDef(Name))
 547           return new DefInit(D);
 548
 549         errs() << "Variable not defined: '" + Name + "'\n";
 550         assert(0 && "Variable not found");
 551         return 0;
 552       }
 553     }
 554     break;
 555   }
 556   case CAR: {
 557     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 558     if (LHSl) {
 559       if (LHSl->getSize() == 0) {
 560         assert(0 && "Empty list in car");
 561         return 0;
 562       }
 563       return LHSl->getElement(0);
 564     }
 565     break;
 566   }
 567   case CDR: {
 568     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 569     if (LHSl) {
 570       if (LHSl->getSize() == 0) {
 571         assert(0 && "Empty list in cdr");
 572         return 0;
 573       }
 574       ListInit *Result = new ListInit(LHSl->begin()+1, LHSl->end(),
 575                                       LHSl->getType());
 576       return Result;
 577     }
 578     break;
 579   }
 580   case LNULL: {
 581     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 582     if (LHSl) {
 583       if (LHSl->getSize() == 0) {
 584         return new IntInit(1);
 585       } else {
 586         return new IntInit(0);
 587       }
 588     }
 589     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 590     if (LHSs) {
 591       if (LHSs->getValue().empty()) {
 592         return new IntInit(1);
 593       } else {
 594         return new IntInit(0);
 595       }
 596     }
 597
 598     break;
 599   }
 600   }
 601   return this;
 602 }
 603
 604 Init *UnOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 605   Init *lhs = LHS->resolveReferences(R, RV);
 606
 607   if (LHS != lhs)
 608     return (new UnOpInit(getOpcode(), lhs, getType()))->Fold(&R, 0);
 609   return Fold(&R, 0);
 610 }
 611
 612 std::string UnOpInit::getAsString() const {
 613   std::string Result;
 614   switch (Opc) {
 615   case CAST: Result = "!cast<" + getType()->getAsString() + ">"; break;
 616   case CAR: Result = "!car"; break;
 617   case CDR: Result = "!cdr"; break;
 618   case LNULL: Result = "!null"; break;
 619   }
 620   return Result + "(" + LHS->getAsString() + ")";
 621 }
 622
 623 RecTy *UnOpInit::getFieldType(const std::string &FieldName) const {
 624   switch (getOpcode()) {
 625   default: assert(0 && "Unknown unop");
 626   case CAST: {
 627     RecordRecTy *RecordType = dynamic_cast<RecordRecTy *>(getType());
 628     if (RecordType) {
 629       RecordVal *Field = RecordType->getRecord()->getValue(FieldName);
 630       if (Field) {
 631         return Field->getType();
 632       }
 633     }
 634     break;
 635   }
 636   }
 637   return 0;
 638 }
 639
 640 Init *BinOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 641   switch (getOpcode()) {
 642   default: assert(0 && "Unknown binop");
 643   case CONCAT: {
 644     DagInit *LHSs = dynamic_cast<DagInit*>(LHS);
 645     DagInit *RHSs = dynamic_cast<DagInit*>(RHS);
 646     if (LHSs && RHSs) {
 647       DefInit *LOp = dynamic_cast<DefInit*>(LHSs->getOperator());
 648       DefInit *ROp = dynamic_cast<DefInit*>(RHSs->getOperator());
 649       if (LOp == 0 || ROp == 0 || LOp->getDef() != ROp->getDef())
 650         throw "Concated Dag operators do not match!";
 651       std::vector<Init*> Args;
 652       std::vector<std::string> ArgNames;
 653       for (unsigned i = 0, e = LHSs->getNumArgs(); i != e; ++i) {
 654         Args.push_back(LHSs->getArg(i));
 655         ArgNames.push_back(LHSs->getArgName(i));
 656       }
 657       for (unsigned i = 0, e = RHSs->getNumArgs(); i != e; ++i) {
 658         Args.push_back(RHSs->getArg(i));
 659         ArgNames.push_back(RHSs->getArgName(i));
 660       }
 661       return new DagInit(LHSs->getOperator(), "", Args, ArgNames);
 662     }
 663     break;
 664   }
 665   case STRCONCAT: {
 666     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 667     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 668     if (LHSs && RHSs)
 669       return new StringInit(LHSs->getValue() + RHSs->getValue());
 670     break;
 671   }
 672   case NAMECONCAT: {
 673     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 674     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 675     if (LHSs && RHSs) {
 676       std::string Name(LHSs->getValue() + RHSs->getValue());
 677
 678       // From TGParser::ParseIDValue
 679       if (CurRec) {
 680         if (const RecordVal *RV = CurRec->getValue(Name)) {
 681           if (RV->getType() != getType()) {
 682             throw "type mismatch in nameconcat";
 683           }
 684           return new VarInit(Name, RV->getType());
 685         }
 686
 687         std::string TemplateArgName = CurRec->getName()+":"+Name;
 688         if (CurRec->isTemplateArg(TemplateArgName)) {
 689           const RecordVal *RV = CurRec->getValue(TemplateArgName);
 690           assert(RV && "Template arg doesn't exist??");
 691
 692           if (RV->getType() != getType()) {
 693             throw "type mismatch in nameconcat";
 694           }
 695
 696           return new VarInit(TemplateArgName, RV->getType());
 697         }
 698       }
 699
 700       if (CurMultiClass) {
 701         std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
 702         if (CurMultiClass->Rec.isTemplateArg(MCName)) {
 703           const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
 704           assert(RV && "Template arg doesn't exist??");
 705
 706           if (RV->getType() != getType()) {
 707             throw "type mismatch in nameconcat";
 708           }
 709
 710           return new VarInit(MCName, RV->getType());
 711         }
 712       }
 713
 714       if (Record *D = Records.getDef(Name))
 715         return new DefInit(D);
 716
 717       errs() << "Variable not defined in !nameconcat: '" + Name + "'\n";
 718       assert(0 && "Variable not found in !nameconcat");
 719       return 0;
 720     }
 721     break;
 722   }
 723   case EQ: {
 724     // Make sure we've resolved
 725     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 726     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 727     if (LHSs && RHSs)
 728       return new IntInit(LHSs->getValue() == RHSs->getValue());
 729
 730     break;
 731   }
 732   case SHL:
 733   case SRA:
 734   case SRL: {
 735     IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
 736     IntInit *RHSi = dynamic_cast<IntInit*>(RHS);
 737     if (LHSi && RHSi) {
 738       int64_t LHSv = LHSi->getValue(), RHSv = RHSi->getValue();
 739       int64_t Result;
 740       switch (getOpcode()) {
 741       default: assert(0 && "Bad opcode!");
 742       case SHL: Result = LHSv << RHSv; break;
 743       case SRA: Result = LHSv >> RHSv; break;
 744       case SRL: Result = (uint64_t)LHSv >> (uint64_t)RHSv; break;
 745       }
 746       return new IntInit(Result);
 747     }
 748     break;
 749   }
 750   }
 751   return this;
 752 }
 753
 754 Init *BinOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 755   Init *lhs = LHS->resolveReferences(R, RV);
 756   Init *rhs = RHS->resolveReferences(R, RV);
 757
 758   if (LHS != lhs || RHS != rhs)
 759     return (new BinOpInit(getOpcode(), lhs, rhs, getType()))->Fold(&R, 0);
 760   return Fold(&R, 0);
 761 }
 762
 763 std::string BinOpInit::getAsString() const {
 764   std::string Result;
 765   switch (Opc) {
 766   case CONCAT: Result = "!con"; break;
 767   case SHL: Result = "!shl"; break;
 768   case SRA: Result = "!sra"; break;
 769   case SRL: Result = "!srl"; break;
 770   case EQ: Result = "!eq"; break;
 771   case STRCONCAT: Result = "!strconcat"; break;
 772   case NAMECONCAT:
 773     Result = "!nameconcat<" + getType()->getAsString() + ">"; break;
 774   }
 775   return Result + "(" + LHS->getAsString() + ", " + RHS->getAsString() + ")";
 776 }
 777
 778 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
 779                            Record *CurRec, MultiClass *CurMultiClass);
 780
 781 static Init *EvaluateOperation(OpInit *RHSo, Init *LHS, Init *Arg,
 782                                RecTy *Type, Record *CurRec,
 783                                MultiClass *CurMultiClass) {
 784   std::vector<Init *> NewOperands;
 785
 786   TypedInit *TArg = dynamic_cast<TypedInit*>(Arg);
 787
 788   // If this is a dag, recurse
 789   if (TArg && TArg->getType()->getAsString() == "dag") {
 790     Init *Result = ForeachHelper(LHS, Arg, RHSo, Type,
 791                                  CurRec, CurMultiClass);
 792     if (Result != 0) {
 793       return Result;
 794     } else {
 795       return 0;
 796     }
 797   }
 798
 799   for (int i = 0; i < RHSo->getNumOperands(); ++i) {
 800     OpInit *RHSoo = dynamic_cast<OpInit*>(RHSo->getOperand(i));
 801
 802     if (RHSoo) {
 803       Init *Result = EvaluateOperation(RHSoo, LHS, Arg,
 804                                        Type, CurRec, CurMultiClass);
 805       if (Result != 0) {
 806         NewOperands.push_back(Result);
 807       } else {
 808         NewOperands.push_back(Arg);
 809       }
 810     } else if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
 811       NewOperands.push_back(Arg);
 812     } else {
 813       NewOperands.push_back(RHSo->getOperand(i));
 814     }
 815   }
 816
 817   // Now run the operator and use its result as the new leaf
 818   OpInit *NewOp = RHSo->clone(NewOperands);
 819   Init *NewVal = NewOp->Fold(CurRec, CurMultiClass);
 820   if (NewVal != NewOp) {
 821     delete NewOp;
 822     return NewVal;
 823   }
 824   return 0;
 825 }
 826
 827 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
 828                            Record *CurRec, MultiClass *CurMultiClass) {
 829   DagInit *MHSd = dynamic_cast<DagInit*>(MHS);
 830   ListInit *MHSl = dynamic_cast<ListInit*>(MHS);
 831
 832   DagRecTy *DagType = dynamic_cast<DagRecTy*>(Type);
 833   ListRecTy *ListType = dynamic_cast<ListRecTy*>(Type);
 834
 835   OpInit *RHSo = dynamic_cast<OpInit*>(RHS);
 836
 837   if (!RHSo) {
 838     errs() << "!foreach requires an operator\n";
 839     assert(0 && "No operator for !foreach");
 840   }
 841
 842   TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
 843
 844   if (!LHSt) {
 845     errs() << "!foreach requires typed variable\n";
 846     assert(0 && "No typed variable for !foreach");
 847   }
 848
 849   if ((MHSd && DagType) || (MHSl && ListType)) {
 850     if (MHSd) {
 851       Init *Val = MHSd->getOperator();
 852       Init *Result = EvaluateOperation(RHSo, LHS, Val,
 853                                        Type, CurRec, CurMultiClass);
 854       if (Result != 0) {
 855         Val = Result;
 856       }
 857
 858       std::vector<std::pair<Init *, std::string> > args;
 859       for (unsigned int i = 0; i < MHSd->getNumArgs(); ++i) {
 860         Init *Arg;
 861         std::string ArgName;
 862         Arg = MHSd->getArg(i);
 863         ArgName = MHSd->getArgName(i);
 864
 865         // Process args
 866         Init *Result = EvaluateOperation(RHSo, LHS, Arg, Type,
 867                                          CurRec, CurMultiClass);
 868         if (Result != 0) {
 869           Arg = Result;
 870         }
 871
 872         // TODO: Process arg names
 873         args.push_back(std::make_pair(Arg, ArgName));
 874       }
 875
 876       return new DagInit(Val, "", args);
 877     }
 878     if (MHSl) {
 879       std::vector<Init *> NewOperands;
 880       std::vector<Init *> NewList(MHSl->begin(), MHSl->end());
 881
 882       for (ListInit::iterator li = NewList.begin(),
 883              liend = NewList.end();
 884            li != liend;
 885            ++li) {
 886         Init *Item = *li;
 887         NewOperands.clear();
 888         for(int i = 0; i < RHSo->getNumOperands(); ++i) {
 889           // First, replace the foreach variable with the list item
 890           if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
 891             NewOperands.push_back(Item);
 892           } else {
 893             NewOperands.push_back(RHSo->getOperand(i));
 894           }
 895         }
 896
 897         // Now run the operator and use its result as the new list item
 898         OpInit *NewOp = RHSo->clone(NewOperands);
 899         Init *NewItem = NewOp->Fold(CurRec, CurMultiClass);
 900         if (NewItem != NewOp) {
 901           *li = NewItem;
 902           delete NewOp;
 903         }
 904       }
 905       return new ListInit(NewList, MHSl->getType());
 906     }
 907   }
 908   return 0;
 909 }
 910
 911 Init *TernOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 912   switch (getOpcode()) {
 913   default: assert(0 && "Unknown binop");
 914   case SUBST: {
 915     DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
 916     VarInit *LHSv = dynamic_cast<VarInit*>(LHS);
 917     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 918
 919     DefInit *MHSd = dynamic_cast<DefInit*>(MHS);
 920     VarInit *MHSv = dynamic_cast<VarInit*>(MHS);
 921     StringInit *MHSs = dynamic_cast<StringInit*>(MHS);
 922
 923     DefInit *RHSd = dynamic_cast<DefInit*>(RHS);
 924     VarInit *RHSv = dynamic_cast<VarInit*>(RHS);
 925     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 926
 927     if ((LHSd && MHSd && RHSd)
 928         || (LHSv && MHSv && RHSv)
 929         || (LHSs && MHSs && RHSs)) {
 930       if (RHSd) {
 931         Record *Val = RHSd->getDef();
 932         if (LHSd->getAsString() == RHSd->getAsString()) {
 933           Val = MHSd->getDef();
 934         }
 935         return new DefInit(Val);
 936       }
 937       if (RHSv) {
 938         std::string Val = RHSv->getName();
 939         if (LHSv->getAsString() == RHSv->getAsString()) {
 940           Val = MHSv->getName();
 941         }
 942         return new VarInit(Val, getType());
 943       }
 944       if (RHSs) {
 945         std::string Val = RHSs->getValue();
 946
 947         std::string::size_type found;
 948         std::string::size_type idx = 0;
 949         do {
 950           found = Val.find(LHSs->getValue(), idx);
 951           if (found != std::string::npos) {
 952             Val.replace(found, LHSs->getValue().size(), MHSs->getValue());
 953           }
 954           idx = found +  MHSs->getValue().size();
 955         } while (found != std::string::npos);
 956
 957         return new StringInit(Val);
 958       }
 959     }
 960     break;
 961   }
 962
 963   case FOREACH: {
 964     Init *Result = ForeachHelper(LHS, MHS, RHS, getType(),
 965                                  CurRec, CurMultiClass);
 966     if (Result != 0) {
 967       return Result;
 968     }
 969     break;
 970   }
 971
 972   case IF: {
 973     IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
 974     if (LHSi) {
 975       if (LHSi->getValue()) {
 976         return MHS;
 977       } else {
 978         return RHS;
 979       }
 980     }
 981     break;
 982   }
 983   }
 984
 985   return this;
 986 }
 987
 988 Init *TernOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 989   Init *lhs = LHS->resolveReferences(R, RV);
 990
 991   if (Opc == IF && lhs != LHS) {
 992     IntInit *Value = dynamic_cast<IntInit*>(lhs);
 993     if (Value != 0) {
 994       // Short-circuit
 995       if (Value->getValue()) {
 996         Init *mhs = MHS->resolveReferences(R, RV);
 997         return (new TernOpInit(getOpcode(), lhs, mhs,
 998                                RHS, getType()))->Fold(&R, 0);
 999       } else {
1000         Init *rhs = RHS->resolveReferences(R, RV);
1001         return (new TernOpInit(getOpcode(), lhs, MHS,
1002                                rhs, getType()))->Fold(&R, 0);
1003       }
1004     }
1005   }
1006
1007   Init *mhs = MHS->resolveReferences(R, RV);
1008   Init *rhs = RHS->resolveReferences(R, RV);
1009
1010   if (LHS != lhs || MHS != mhs || RHS != rhs)
1011     return (new TernOpInit(getOpcode(), lhs, mhs, rhs, getType()))->Fold(&R, 0);
1012   return Fold(&R, 0);
1013 }
1014
1015 std::string TernOpInit::getAsString() const {
1016   std::string Result;
1017   switch (Opc) {
1018   case SUBST: Result = "!subst"; break;
1019   case FOREACH: Result = "!foreach"; break;
1020   case IF: Result = "!if"; break;
1021  }
1022   return Result + "(" + LHS->getAsString() + ", " + MHS->getAsString() + ", "
1023     + RHS->getAsString() + ")";
1024 }
1025
1026 Init *TypedInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
1027   BitsRecTy *T = dynamic_cast<BitsRecTy*>(getType());
1028   if (T == 0) return 0;  // Cannot subscript a non-bits variable...
1029   unsigned NumBits = T->getNumBits();
1030
1031   BitsInit *BI = new BitsInit(Bits.size());
1032   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
1033     if (Bits[i] >= NumBits) {
1034       delete BI;
1035       return 0;
1036     }
1037     BI->setBit(i, new VarBitInit(this, Bits[i]));
1038   }
1039   return BI;
1040 }
1041
1042 Init *TypedInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
1043   ListRecTy *T = dynamic_cast<ListRecTy*>(getType());
1044   if (T == 0) return 0;  // Cannot subscript a non-list variable...
1045
1046   if (Elements.size() == 1)
1047     return new VarListElementInit(this, Elements[0]);
1048
1049   std::vector<Init*> ListInits;
1050   ListInits.reserve(Elements.size());
1051   for (unsigned i = 0, e = Elements.size(); i != e; ++i)
1052     ListInits.push_back(new VarListElementInit(this, Elements[i]));
1053   return new ListInit(ListInits, T);
1054 }
1055
1056
1057 Init *VarInit::resolveBitReference(Record &R, const RecordVal *IRV,
1058                                    unsigned Bit) {
1059   if (R.isTemplateArg(getName())) return 0;
1060   if (IRV && IRV->getName() != getName()) return 0;
1061
1062   RecordVal *RV = R.getValue(getName());
1063   assert(RV && "Reference to a non-existent variable?");
1064   assert(dynamic_cast<BitsInit*>(RV->getValue()));
1065   BitsInit *BI = (BitsInit*)RV->getValue();
1066
1067   assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1068   Init *B = BI->getBit(Bit);
1069
1070   // If the bit is set to some value, or if we are resolving a reference to a
1071   // specific variable and that variable is explicitly unset, then replace the
1072   // VarBitInit with it.
1073   if (IRV || !dynamic_cast<UnsetInit*>(B))
1074     return B;
1075   return 0;
1076 }
1077
1078 Init *VarInit::resolveListElementReference(Record &R, const RecordVal *IRV,
1079                                            unsigned Elt) {
1080   if (R.isTemplateArg(getName())) return 0;
1081   if (IRV && IRV->getName() != getName()) return 0;
1082
1083   RecordVal *RV = R.getValue(getName());
1084   assert(RV && "Reference to a non-existent variable?");
1085   ListInit *LI = dynamic_cast<ListInit*>(RV->getValue());
1086   if (!LI) {
1087     VarInit *VI = dynamic_cast<VarInit*>(RV->getValue());
1088     assert(VI && "Invalid list element!");
1089     return new VarListElementInit(VI, Elt);
1090   }
1091
1092   if (Elt >= LI->getSize())
1093     return 0;  // Out of range reference.
1094   Init *E = LI->getElement(Elt);
1095   // If the element is set to some value, or if we are resolving a reference
1096   // to a specific variable and that variable is explicitly unset, then
1097   // replace the VarListElementInit with it.
1098   if (IRV || !dynamic_cast<UnsetInit*>(E))
1099     return E;
1100   return 0;
1101 }
1102
1103
1104 RecTy *VarInit::getFieldType(const std::string &FieldName) const {
1105   if (RecordRecTy *RTy = dynamic_cast<RecordRecTy*>(getType()))
1106     if (const RecordVal *RV = RTy->getRecord()->getValue(FieldName))
1107       return RV->getType();
1108   return 0;
1109 }
1110
1111 Init *VarInit::getFieldInit(Record &R, const RecordVal *RV,
1112                             const std::string &FieldName) const {
1113   if (dynamic_cast<RecordRecTy*>(getType()))
1114     if (const RecordVal *Val = R.getValue(VarName)) {
1115       if (RV != Val && (RV || dynamic_cast<UnsetInit*>(Val->getValue())))
1116         return 0;
1117       Init *TheInit = Val->getValue();
1118       assert(TheInit != this && "Infinite loop detected!");
1119       if (Init *I = TheInit->getFieldInit(R, RV, FieldName))
1120         return I;
1121       else
1122         return 0;
1123     }
1124   return 0;
1125 }
1126
1127 /// resolveReferences - This method is used by classes that refer to other
1128 /// variables which may not be defined at the time the expression is formed.
1129 /// If a value is set for the variable later, this method will be called on
1130 /// users of the value to allow the value to propagate out.
1131 ///
1132 Init *VarInit::resolveReferences(Record &R, const RecordVal *RV) {
1133   if (RecordVal *Val = R.getValue(VarName))
1134     if (RV == Val || (RV == 0 && !dynamic_cast<UnsetInit*>(Val->getValue())))
1135       return Val->getValue();
1136   return this;
1137 }
1138
1139 std::string VarBitInit::getAsString() const {
1140    return TI->getAsString() + "{" + utostr(Bit) + "}";
1141 }
1142
1143 Init *VarBitInit::resolveReferences(Record &R, const RecordVal *RV) {
1144   if (Init *I = getVariable()->resolveBitReference(R, RV, getBitNum()))
1145     return I;
1146   return this;
1147 }
1148
1149 std::string VarListElementInit::getAsString() const {
1150   return TI->getAsString() + "[" + utostr(Element) + "]";
1151 }
1152
1153 Init *VarListElementInit::resolveReferences(Record &R, const RecordVal *RV) {
1154   if (Init *I = getVariable()->resolveListElementReference(R, RV,
1155                                                            getElementNum()))
1156     return I;
1157   return this;
1158 }
1159
1160 Init *VarListElementInit::resolveBitReference(Record &R, const RecordVal *RV,
1161                                               unsigned Bit) {
1162   // FIXME: This should be implemented, to support references like:
1163   // bit B = AA[0]{1};
1164   return 0;
1165 }
1166
1167 Init *VarListElementInit::
1168 resolveListElementReference(Record &R, const RecordVal *RV, unsigned Elt) {
1169   // FIXME: This should be implemented, to support references like:
1170   // int B = AA[0][1];
1171   return 0;
1172 }
1173
1174 RecTy *DefInit::getFieldType(const std::string &FieldName) const {
1175   if (const RecordVal *RV = Def->getValue(FieldName))
1176     return RV->getType();
1177   return 0;
1178 }
1179
1180 Init *DefInit::getFieldInit(Record &R, const RecordVal *RV,
1181                             const std::string &FieldName) const {
1182   return Def->getValue(FieldName)->getValue();
1183 }
1184
1185
1186 std::string DefInit::getAsString() const {
1187   return Def->getName();
1188 }
1189
1190 Init *FieldInit::resolveBitReference(Record &R, const RecordVal *RV,
1191                                      unsigned Bit) {
1192   if (Init *BitsVal = Rec->getFieldInit(R, RV, FieldName))
1193     if (BitsInit *BI = dynamic_cast<BitsInit*>(BitsVal)) {
1194       assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1195       Init *B = BI->getBit(Bit);
1196
1197       if (dynamic_cast<BitInit*>(B))  // If the bit is set...
1198         return B;                     // Replace the VarBitInit with it.
1199     }
1200   return 0;
1201 }
1202
1203 Init *FieldInit::resolveListElementReference(Record &R, const RecordVal *RV,
1204                                              unsigned Elt) {
1205   if (Init *ListVal = Rec->getFieldInit(R, RV, FieldName))
1206     if (ListInit *LI = dynamic_cast<ListInit*>(ListVal)) {
1207       if (Elt >= LI->getSize()) return 0;
1208       Init *E = LI->getElement(Elt);
1209
1210       // If the element is set to some value, or if we are resolving a
1211       // reference to a specific variable and that variable is explicitly
1212       // unset, then replace the VarListElementInit with it.
1213       if (RV || !dynamic_cast<UnsetInit*>(E))
1214         return E;
1215     }
1216   return 0;
1217 }
1218
1219 Init *FieldInit::resolveReferences(Record &R, const RecordVal *RV) {
1220   Init *NewRec = RV ? Rec->resolveReferences(R, RV) : Rec;
1221
1222   Init *BitsVal = NewRec->getFieldInit(R, RV, FieldName);
1223   if (BitsVal) {
1224     Init *BVR = BitsVal->resolveReferences(R, RV);
1225     return BVR->isComplete() ? BVR : this;
1226   }
1227
1228   if (NewRec != Rec) {
1229     return new FieldInit(NewRec, FieldName);
1230   }
1231   return this;
1232 }
1233
1234 Init *DagInit::resolveReferences(Record &R, const RecordVal *RV) {
1235   std::vector<Init*> NewArgs;
1236   for (unsigned i = 0, e = Args.size(); i != e; ++i)
1237     NewArgs.push_back(Args[i]->resolveReferences(R, RV));
1238
1239   Init *Op = Val->resolveReferences(R, RV);
1240
1241   if (Args != NewArgs || Op != Val)
1242     return new DagInit(Op, "", NewArgs, ArgNames);
1243
1244   return this;
1245 }
1246
1247
1248 std::string DagInit::getAsString() const {
1249   std::string Result = "(" + Val->getAsString();
1250   if (!ValName.empty())
1251     Result += ":" + ValName;
1252   if (Args.size()) {
1253     Result += " " + Args[0]->getAsString();
1254     if (!ArgNames[0].empty()) Result += ":$" + ArgNames[0];
1255     for (unsigned i = 1, e = Args.size(); i != e; ++i) {
1256       Result += ", " + Args[i]->getAsString();
1257       if (!ArgNames[i].empty()) Result += ":$" + ArgNames[i];
1258     }
1259   }
1260   return Result + ")";
1261 }
1262
1263
1264 //===----------------------------------------------------------------------===//
1265 //    Other implementations
1266 //===----------------------------------------------------------------------===//
1267
1268 RecordVal::RecordVal(const std::string &N, RecTy *T, unsigned P)
1269   : Name(N), Ty(T), Prefix(P) {
1270   Value = Ty->convertValue(new UnsetInit());
1271   assert(Value && "Cannot create unset value for current type!");
1272 }
1273
1274 void RecordVal::dump() const { errs() << *this; }
1275
1276 void RecordVal::print(raw_ostream &OS, bool PrintSem) const {
1277   if (getPrefix()) OS << "field ";
1278   OS << *getType() << " " << getName();
1279
1280   if (getValue())
1281     OS << " = " << *getValue();
1282
1283   if (PrintSem) OS << ";\n";
1284 }
1285
1286 unsigned Record::LastID = 0;
1287
1288 void Record::setName(const std::string &Name) {
1289   if (Records.getDef(getName()) == this) {
1290     Records.removeDef(getName());
1291     this->Name = Name;
1292     Records.addDef(this);
1293   } else {
1294     Records.removeClass(getName());
1295     this->Name = Name;
1296     Records.addClass(this);
1297   }
1298 }
1299
1300 /// resolveReferencesTo - If anything in this record refers to RV, replace the
1301 /// reference to RV with the RHS of RV.  If RV is null, we resolve all possible
1302 /// references.
1303 void Record::resolveReferencesTo(const RecordVal *RV) {
1304   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1305     if (Init *V = Values[i].getValue())
1306       Values[i].setValue(V->resolveReferences(*this, RV));
1307   }
1308 }
1309
1310 void Record::dump() const { errs() << *this; }
1311
1312 raw_ostream &llvm::operator<<(raw_ostream &OS, const Record &R) {
1313   OS << R.getName();
1314
1315   const std::vector<std::string> &TArgs = R.getTemplateArgs();
1316   if (!TArgs.empty()) {
1317     OS << "<";
1318     for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1319       if (i) OS << ", ";
1320       const RecordVal *RV = R.getValue(TArgs[i]);
1321       assert(RV && "Template argument record not found??");
1322       RV->print(OS, false);
1323     }
1324     OS << ">";
1325   }
1326
1327   OS << " {";
1328   const std::vector<Record*> &SC = R.getSuperClasses();
1329   if (!SC.empty()) {
1330     OS << "\t//";
1331     for (unsigned i = 0, e = SC.size(); i != e; ++i)
1332       OS << " " << SC[i]->getName();
1333   }
1334   OS << "\n";
1335
1336   const std::vector<RecordVal> &Vals = R.getValues();
1337   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1338     if (Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1339       OS << Vals[i];
1340   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1341     if (!Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1342       OS << Vals[i];
1343
1344   return OS << "}\n";
1345 }
1346
1347 /// getValueInit - Return the initializer for a value with the specified name,
1348 /// or throw an exception if the field does not exist.
1349 ///
1350 Init *Record::getValueInit(StringRef FieldName) const {
1351   const RecordVal *R = getValue(FieldName);
1352   if (R == 0 || R->getValue() == 0)
1353     throw "Record `" + getName() + "' does not have a field named `" +
1354       FieldName.str() + "'!\n";
1355   return R->getValue();
1356 }
1357
1358
1359 /// getValueAsString - This method looks up the specified field and returns its
1360 /// value as a string, throwing an exception if the field does not exist or if
1361 /// the value is not a string.
1362 ///
1363 std::string Record::getValueAsString(StringRef FieldName) const {
1364   const RecordVal *R = getValue(FieldName);
1365   if (R == 0 || R->getValue() == 0)
1366     throw "Record `" + getName() + "' does not have a field named `" +
1367           FieldName.str() + "'!\n";
1368
1369   if (const StringInit *SI = dynamic_cast<const StringInit*>(R->getValue()))
1370     return SI->getValue();
1371   throw "Record `" + getName() + "', field `" + FieldName.str() +
1372         "' does not have a string initializer!";
1373 }
1374
1375 /// getValueAsBitsInit - This method looks up the specified field and returns
1376 /// its value as a BitsInit, throwing an exception if the field does not exist
1377 /// or if the value is not the right type.
1378 ///
1379 BitsInit *Record::getValueAsBitsInit(StringRef FieldName) const {
1380   const RecordVal *R = getValue(FieldName);
1381   if (R == 0 || R->getValue() == 0)
1382     throw "Record `" + getName() + "' does not have a field named `" +
1383           FieldName.str() + "'!\n";
1384
1385   if (BitsInit *BI = dynamic_cast<BitsInit*>(R->getValue()))
1386     return BI;
1387   throw "Record `" + getName() + "', field `" + FieldName.str() +
1388         "' does not have a BitsInit initializer!";
1389 }
1390
1391 /// getValueAsListInit - This method looks up the specified field and returns
1392 /// its value as a ListInit, throwing an exception if the field does not exist
1393 /// or if the value is not the right type.
1394 ///
1395 ListInit *Record::getValueAsListInit(StringRef FieldName) const {
1396   const RecordVal *R = getValue(FieldName);
1397   if (R == 0 || R->getValue() == 0)
1398     throw "Record `" + getName() + "' does not have a field named `" +
1399           FieldName.str() + "'!\n";
1400
1401   if (ListInit *LI = dynamic_cast<ListInit*>(R->getValue()))
1402     return LI;
1403   throw "Record `" + getName() + "', field `" + FieldName.str() +
1404         "' does not have a list initializer!";
1405 }
1406
1407 /// getValueAsListOfDefs - This method looks up the specified field and returns
1408 /// its value as a vector of records, throwing an exception if the field does
1409 /// not exist or if the value is not the right type.
1410 ///
1411 std::vector<Record*>
1412 Record::getValueAsListOfDefs(StringRef FieldName) const {
1413   ListInit *List = getValueAsListInit(FieldName);
1414   std::vector<Record*> Defs;
1415   for (unsigned i = 0; i < List->getSize(); i++) {
1416     if (DefInit *DI = dynamic_cast<DefInit*>(List->getElement(i))) {
1417       Defs.push_back(DI->getDef());
1418     } else {
1419       throw "Record `" + getName() + "', field `" + FieldName.str() +
1420             "' list is not entirely DefInit!";
1421     }
1422   }
1423   return Defs;
1424 }
1425
1426 /// getValueAsInt - This method looks up the specified field and returns its
1427 /// value as an int64_t, throwing an exception if the field does not exist or if
1428 /// the value is not the right type.
1429 ///
1430 int64_t Record::getValueAsInt(StringRef FieldName) const {
1431   const RecordVal *R = getValue(FieldName);
1432   if (R == 0 || R->getValue() == 0)
1433     throw "Record `" + getName() + "' does not have a field named `" +
1434           FieldName.str() + "'!\n";
1435
1436   if (IntInit *II = dynamic_cast<IntInit*>(R->getValue()))
1437     return II->getValue();
1438   throw "Record `" + getName() + "', field `" + FieldName.str() +
1439         "' does not have an int initializer!";
1440 }
1441
1442 /// getValueAsListOfInts - This method looks up the specified field and returns
1443 /// its value as a vector of integers, throwing an exception if the field does
1444 /// not exist or if the value is not the right type.
1445 ///
1446 std::vector<int64_t>
1447 Record::getValueAsListOfInts(StringRef FieldName) const {
1448   ListInit *List = getValueAsListInit(FieldName);
1449   std::vector<int64_t> Ints;
1450   for (unsigned i = 0; i < List->getSize(); i++) {
1451     if (IntInit *II = dynamic_cast<IntInit*>(List->getElement(i))) {
1452       Ints.push_back(II->getValue());
1453     } else {
1454       throw "Record `" + getName() + "', field `" + FieldName.str() +
1455             "' does not have a list of ints initializer!";
1456     }
1457   }
1458   return Ints;
1459 }
1460
1461 /// getValueAsDef - This method looks up the specified field and returns its
1462 /// value as a Record, throwing an exception if the field does not exist or if
1463 /// the value is not the right type.
1464 ///
1465 Record *Record::getValueAsDef(StringRef FieldName) const {
1466   const RecordVal *R = getValue(FieldName);
1467   if (R == 0 || R->getValue() == 0)
1468     throw "Record `" + getName() + "' does not have a field named `" +
1469       FieldName.str() + "'!\n";
1470
1471   if (DefInit *DI = dynamic_cast<DefInit*>(R->getValue()))
1472     return DI->getDef();
1473   throw "Record `" + getName() + "', field `" + FieldName.str() +
1474         "' does not have a def initializer!";
1475 }
1476
1477 /// getValueAsBit - This method looks up the specified field and returns its
1478 /// value as a bit, throwing an exception if the field does not exist or if
1479 /// the value is not the right type.
1480 ///
1481 bool Record::getValueAsBit(StringRef FieldName) const {
1482   const RecordVal *R = getValue(FieldName);
1483   if (R == 0 || R->getValue() == 0)
1484     throw "Record `" + getName() + "' does not have a field named `" +
1485       FieldName.str() + "'!\n";
1486
1487   if (BitInit *BI = dynamic_cast<BitInit*>(R->getValue()))
1488     return BI->getValue();
1489   throw "Record `" + getName() + "', field `" + FieldName.str() +
1490         "' does not have a bit initializer!";
1491 }
1492
1493 /// getValueAsDag - This method looks up the specified field and returns its
1494 /// value as an Dag, throwing an exception if the field does not exist or if
1495 /// the value is not the right type.
1496 ///
1497 DagInit *Record::getValueAsDag(StringRef FieldName) const {
1498   const RecordVal *R = getValue(FieldName);
1499   if (R == 0 || R->getValue() == 0)
1500     throw "Record `" + getName() + "' does not have a field named `" +
1501       FieldName.str() + "'!\n";
1502
1503   if (DagInit *DI = dynamic_cast<DagInit*>(R->getValue()))
1504     return DI;
1505   throw "Record `" + getName() + "', field `" + FieldName.str() +
1506         "' does not have a dag initializer!";
1507 }
1508
1509 std::string Record::getValueAsCode(StringRef FieldName) const {
1510   const RecordVal *R = getValue(FieldName);
1511   if (R == 0 || R->getValue() == 0)
1512     throw "Record `" + getName() + "' does not have a field named `" +
1513       FieldName.str() + "'!\n";
1514
1515   if (const CodeInit *CI = dynamic_cast<const CodeInit*>(R->getValue()))
1516     return CI->getValue();
1517   throw "Record `" + getName() + "', field `" + FieldName.str() +
1518     "' does not have a code initializer!";
1519 }
1520
1521
1522 void MultiClass::dump() const {
1523   errs() << "Record:\n";
1524   Rec.dump();
1525
1526   errs() << "Defs:\n";
1527   for (RecordVector::const_iterator r = DefPrototypes.begin(),
1528          rend = DefPrototypes.end();
1529        r != rend;
1530        ++r) {
1531     (*r)->dump();
1532   }
1533 }
1534
1535
1536 void RecordKeeper::dump() const { errs() << *this; }
1537
1538 raw_ostream &llvm::operator<<(raw_ostream &OS, const RecordKeeper &RK) {
1539   OS << "------------- Classes -----------------\n";
1540   const std::map<std::string, Record*> &Classes = RK.getClasses();
1541   for (std::map<std::string, Record*>::const_iterator I = Classes.begin(),
1542          E = Classes.end(); I != E; ++I)
1543     OS << "class " << *I->second;
1544
1545   OS << "------------- Defs -----------------\n";
1546   const std::map<std::string, Record*> &Defs = RK.getDefs();
1547   for (std::map<std::string, Record*>::const_iterator I = Defs.begin(),
1548          E = Defs.end(); I != E; ++I)
1549     OS << "def " << *I->second;
1550   return OS;
1551 }
1552
1553
1554 /// getAllDerivedDefinitions - This method returns all concrete definitions
1555 /// that derive from the specified class name.  If a class with the specified
1556 /// name does not exist, an error is printed and true is returned.
1557 std::vector<Record*>
1558 RecordKeeper::getAllDerivedDefinitions(const std::string &ClassName) const {
1559   Record *Class = Records.getClass(ClassName);
1560   if (!Class)
1561     throw "ERROR: Couldn't find the `" + ClassName + "' class!\n";
1562
1563   std::vector<Record*> Defs;
1564   for (std::map<std::string, Record*>::const_iterator I = getDefs().begin(),
1565          E = getDefs().end(); I != E; ++I)
1566     if (I->second->isSubClassOf(Class))
1567       Defs.push_back(I->second);
1568
1569   return Defs;
1570 }
1571