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