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