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 // convertValue from Int initializer to bits type: Split the integer up into the
  69 // appropriate bits...
  70 //
  71 Init *BitsRecTy::convertValue(IntInit *II) {
  72   int64_t Value = II->getValue();
  73   // Make sure this bitfield is large enough to hold the integer value...
  74   if (Value >= 0) {
  75     if (Value & ~((1LL << Size)-1))
  76       return 0;
  77   } else {
  78     if ((Value >> Size) != -1 || ((Value & (1LL << (Size-1))) == 0))
  79       return 0;
  80   }
  81
  82   BitsInit *Ret = new BitsInit(Size);
  83   for (unsigned i = 0; i != Size; ++i)
  84     Ret->setBit(i, new BitInit(Value & (1LL << i)));
  85
  86   return Ret;
  87 }
  88
  89 Init *BitsRecTy::convertValue(BitsInit *BI) {
  90   // If the number of bits is right, return it.  Otherwise we need to expand or
  91   // truncate...
  92   if (BI->getNumBits() == Size) return BI;
  93   return 0;
  94 }
  95
  96 Init *BitsRecTy::convertValue(TypedInit *VI) {
  97   if (BitsRecTy *BRT = dynamic_cast<BitsRecTy*>(VI->getType()))
  98     if (BRT->Size == Size) {
  99       BitsInit *Ret = new BitsInit(Size);
 100       for (unsigned i = 0; i != Size; ++i)
 101         Ret->setBit(i, new VarBitInit(VI, i));
 102       return Ret;
 103     }
 104   if (Size == 1 && dynamic_cast<BitRecTy*>(VI->getType())) {
 105     BitsInit *Ret = new BitsInit(1);
 106     Ret->setBit(0, VI);
 107     return Ret;
 108   }
 109
 110   return 0;
 111 }
 112
 113 Init *IntRecTy::convertValue(BitInit *BI) {
 114   return new IntInit(BI->getValue());
 115 }
 116
 117 Init *IntRecTy::convertValue(BitsInit *BI) {
 118   int64_t Result = 0;
 119   for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
 120     if (BitInit *Bit = dynamic_cast<BitInit*>(BI->getBit(i))) {
 121       Result |= Bit->getValue() << i;
 122     } else {
 123       return 0;
 124     }
 125   return new IntInit(Result);
 126 }
 127
 128 Init *IntRecTy::convertValue(TypedInit *TI) {
 129   if (TI->getType()->typeIsConvertibleTo(this))
 130     return TI;  // Accept variable if already of the right type!
 131   return 0;
 132 }
 133
 134 Init *StringRecTy::convertValue(UnOpInit *BO) {
 135   if (BO->getOpcode() == UnOpInit::CAST) {
 136     Init *L = BO->getOperand()->convertInitializerTo(this);
 137     if (L == 0) return 0;
 138     if (L != BO->getOperand())
 139       return new UnOpInit(UnOpInit::CAST, L, new StringRecTy);
 140     return BO;
 141   }
 142
 143   return convertValue((TypedInit*)BO);
 144 }
 145
 146 Init *StringRecTy::convertValue(BinOpInit *BO) {
 147   if (BO->getOpcode() == BinOpInit::STRCONCAT) {
 148     Init *L = BO->getLHS()->convertInitializerTo(this);
 149     Init *R = BO->getRHS()->convertInitializerTo(this);
 150     if (L == 0 || R == 0) return 0;
 151     if (L != BO->getLHS() || R != BO->getRHS())
 152       return new BinOpInit(BinOpInit::STRCONCAT, L, R, new StringRecTy);
 153     return BO;
 154   }
 155   if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
 156     if (BO->getType()->getAsString() == getAsString()) {
 157       Init *L = BO->getLHS()->convertInitializerTo(this);
 158       Init *R = BO->getRHS()->convertInitializerTo(this);
 159       if (L == 0 || R == 0) return 0;
 160       if (L != BO->getLHS() || R != BO->getRHS())
 161         return new BinOpInit(BinOpInit::NAMECONCAT, L, R, new StringRecTy);
 162       return BO;
 163     }
 164   }
 165
 166   return convertValue((TypedInit*)BO);
 167 }
 168
 169
 170 Init *StringRecTy::convertValue(TypedInit *TI) {
 171   if (dynamic_cast<StringRecTy*>(TI->getType()))
 172     return TI;  // Accept variable if already of the right type!
 173   return 0;
 174 }
 175
 176 std::string ListRecTy::getAsString() const {
 177   return "list<" + Ty->getAsString() + ">";
 178 }
 179
 180 Init *ListRecTy::convertValue(ListInit *LI) {
 181   std::vector<Init*> Elements;
 182
 183   // Verify that all of the elements of the list are subclasses of the
 184   // appropriate class!
 185   for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
 186     if (Init *CI = LI->getElement(i)->convertInitializerTo(Ty))
 187       Elements.push_back(CI);
 188     else
 189       return 0;
 190
 191   ListRecTy *LType = dynamic_cast<ListRecTy*>(LI->getType());
 192   if (LType == 0) {
 193     return 0;
 194   }
 195
 196   return new ListInit(Elements, new ListRecTy(Ty));
 197 }
 198
 199 Init *ListRecTy::convertValue(TypedInit *TI) {
 200   // Ensure that TI is compatible with our class.
 201   if (ListRecTy *LRT = dynamic_cast<ListRecTy*>(TI->getType()))
 202     if (LRT->getElementType()->typeIsConvertibleTo(getElementType()))
 203       return TI;
 204   return 0;
 205 }
 206
 207 Init *CodeRecTy::convertValue(TypedInit *TI) {
 208   if (TI->getType()->typeIsConvertibleTo(this))
 209     return TI;
 210   return 0;
 211 }
 212
 213 Init *DagRecTy::convertValue(TypedInit *TI) {
 214   if (TI->getType()->typeIsConvertibleTo(this))
 215     return TI;
 216   return 0;
 217 }
 218
 219 Init *DagRecTy::convertValue(UnOpInit *BO) {
 220   if (BO->getOpcode() == UnOpInit::CAST) {
 221     Init *L = BO->getOperand()->convertInitializerTo(this);
 222     if (L == 0) return 0;
 223     if (L != BO->getOperand())
 224       return new UnOpInit(UnOpInit::CAST, L, new DagRecTy);
 225     return BO;
 226   }
 227   return 0;
 228 }
 229
 230 Init *DagRecTy::convertValue(BinOpInit *BO) {
 231   if (BO->getOpcode() == BinOpInit::CONCAT) {
 232     Init *L = BO->getLHS()->convertInitializerTo(this);
 233     Init *R = BO->getRHS()->convertInitializerTo(this);
 234     if (L == 0 || R == 0) return 0;
 235     if (L != BO->getLHS() || R != BO->getRHS())
 236       return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
 237     return BO;
 238   }
 239   if (BO->getOpcode() == BinOpInit::NAMECONCAT) {
 240     if (BO->getType()->getAsString() == getAsString()) {
 241       Init *L = BO->getLHS()->convertInitializerTo(this);
 242       Init *R = BO->getRHS()->convertInitializerTo(this);
 243       if (L == 0 || R == 0) return 0;
 244       if (L != BO->getLHS() || R != BO->getRHS())
 245         return new BinOpInit(BinOpInit::CONCAT, L, R, new DagRecTy);
 246       return BO;
 247     }
 248   }
 249   return 0;
 250 }
 251
 252 std::string RecordRecTy::getAsString() const {
 253   return Rec->getName();
 254 }
 255
 256 Init *RecordRecTy::convertValue(DefInit *DI) {
 257   // Ensure that DI is a subclass of Rec.
 258   if (!DI->getDef()->isSubClassOf(Rec))
 259     return 0;
 260   return DI;
 261 }
 262
 263 Init *RecordRecTy::convertValue(TypedInit *TI) {
 264   // Ensure that TI is compatible with Rec.
 265   if (RecordRecTy *RRT = dynamic_cast<RecordRecTy*>(TI->getType()))
 266     if (RRT->getRecord()->isSubClassOf(getRecord()) ||
 267         RRT->getRecord() == getRecord())
 268       return TI;
 269   return 0;
 270 }
 271
 272 bool RecordRecTy::baseClassOf(const RecordRecTy *RHS) const {
 273   return Rec == RHS->getRecord() || RHS->getRecord()->isSubClassOf(Rec);
 274 }
 275
 276
 277 /// resolveTypes - Find a common type that T1 and T2 convert to.
 278 /// Return 0 if no such type exists.
 279 ///
 280 RecTy *llvm::resolveTypes(RecTy *T1, RecTy *T2) {
 281   if (!T1->typeIsConvertibleTo(T2)) {
 282     if (!T2->typeIsConvertibleTo(T1)) {
 283       // If one is a Record type, check superclasses
 284       RecordRecTy *RecTy1 = dynamic_cast<RecordRecTy*>(T1);
 285       if (RecTy1) {
 286         // See if T2 inherits from a type T1 also inherits from
 287         const std::vector<Record *> &T1SuperClasses = RecTy1->getRecord()->getSuperClasses();
 288         for(std::vector<Record *>::const_iterator i = T1SuperClasses.begin(),
 289               iend = T1SuperClasses.end();
 290             i != iend;
 291             ++i) {
 292           RecordRecTy *SuperRecTy1 = new RecordRecTy(*i);
 293           RecTy *NewType1 = resolveTypes(SuperRecTy1, T2);
 294           if (NewType1 != 0) {
 295             if (NewType1 != SuperRecTy1) {
 296               delete SuperRecTy1;
 297             }
 298             return NewType1;
 299           }
 300         }
 301       }
 302       RecordRecTy *RecTy2 = dynamic_cast<RecordRecTy*>(T2);
 303       if (RecTy2) {
 304         // See if T1 inherits from a type T2 also inherits from
 305         const std::vector<Record *> &T2SuperClasses = RecTy2->getRecord()->getSuperClasses();
 306         for(std::vector<Record *>::const_iterator i = T2SuperClasses.begin(),
 307               iend = T2SuperClasses.end();
 308             i != iend;
 309             ++i) {
 310           RecordRecTy *SuperRecTy2 = new RecordRecTy(*i);
 311           RecTy *NewType2 = resolveTypes(T1, SuperRecTy2);
 312           if (NewType2 != 0) {
 313             if (NewType2 != SuperRecTy2) {
 314               delete SuperRecTy2;
 315             }
 316             return NewType2;
 317           }
 318         }
 319       }
 320       return 0;
 321     }
 322     return T2;
 323   }
 324   return T1;
 325 }
 326
 327
 328 //===----------------------------------------------------------------------===//
 329 //    Initializer implementations
 330 //===----------------------------------------------------------------------===//
 331
 332 void Init::dump() const { return print(errs()); }
 333
 334 Init *BitsInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 335   BitsInit *BI = new BitsInit(Bits.size());
 336   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 337     if (Bits[i] >= getNumBits()) {
 338       delete BI;
 339       return 0;
 340     }
 341     BI->setBit(i, getBit(Bits[i]));
 342   }
 343   return BI;
 344 }
 345
 346 std::string BitsInit::getAsString() const {
 347   //if (!printInHex(OS)) return;
 348   //if (!printAsVariable(OS)) return;
 349   //if (!printAsUnset(OS)) return;
 350
 351   std::string Result = "{ ";
 352   for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
 353     if (i) Result += ", ";
 354     if (Init *Bit = getBit(e-i-1))
 355       Result += Bit->getAsString();
 356     else
 357       Result += "*";
 358   }
 359   return Result + " }";
 360 }
 361
 362 bool BitsInit::printInHex(raw_ostream &OS) const {
 363   // First, attempt to convert the value into an integer value...
 364   int64_t Result = 0;
 365   for (unsigned i = 0, e = getNumBits(); i != e; ++i)
 366     if (BitInit *Bit = dynamic_cast<BitInit*>(getBit(i))) {
 367       Result |= Bit->getValue() << i;
 368     } else {
 369       return true;
 370     }
 371
 372   OS << format("0x%x", Result);
 373   return false;
 374 }
 375
 376 bool BitsInit::printAsVariable(raw_ostream &OS) const {
 377   // Get the variable that we may be set equal to...
 378   assert(getNumBits() != 0);
 379   VarBitInit *FirstBit = dynamic_cast<VarBitInit*>(getBit(0));
 380   if (FirstBit == 0) return true;
 381   TypedInit *Var = FirstBit->getVariable();
 382
 383   // Check to make sure the types are compatible.
 384   BitsRecTy *Ty = dynamic_cast<BitsRecTy*>(FirstBit->getVariable()->getType());
 385   if (Ty == 0) return true;
 386   if (Ty->getNumBits() != getNumBits()) return true; // Incompatible types!
 387
 388   // Check to make sure all bits are referring to the right bits in the variable
 389   for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
 390     VarBitInit *Bit = dynamic_cast<VarBitInit*>(getBit(i));
 391     if (Bit == 0 || Bit->getVariable() != Var || Bit->getBitNum() != i)
 392       return true;
 393   }
 394
 395   Var->print(OS);
 396   return false;
 397 }
 398
 399 bool BitsInit::printAsUnset(raw_ostream &OS) const {
 400   for (unsigned i = 0, e = getNumBits(); i != e; ++i)
 401     if (!dynamic_cast<UnsetInit*>(getBit(i)))
 402       return true;
 403   OS << "?";
 404   return false;
 405 }
 406
 407 // resolveReferences - If there are any field references that refer to fields
 408 // that have been filled in, we can propagate the values now.
 409 //
 410 Init *BitsInit::resolveReferences(Record &R, const RecordVal *RV) {
 411   bool Changed = false;
 412   BitsInit *New = new BitsInit(getNumBits());
 413
 414   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 415     Init *B;
 416     Init *CurBit = getBit(i);
 417
 418     do {
 419       B = CurBit;
 420       CurBit = CurBit->resolveReferences(R, RV);
 421       Changed |= B != CurBit;
 422     } while (B != CurBit);
 423     New->setBit(i, CurBit);
 424   }
 425
 426   if (Changed)
 427     return New;
 428   delete New;
 429   return this;
 430 }
 431
 432 std::string IntInit::getAsString() const {
 433   return itostr(Value);
 434 }
 435
 436 Init *IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 437   BitsInit *BI = new BitsInit(Bits.size());
 438
 439   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 440     if (Bits[i] >= 64) {
 441       delete BI;
 442       return 0;
 443     }
 444     BI->setBit(i, new BitInit(Value & (INT64_C(1) << Bits[i])));
 445   }
 446   return BI;
 447 }
 448
 449 Init *ListInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
 450   std::vector<Init*> Vals;
 451   for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
 452     if (Elements[i] >= getSize())
 453       return 0;
 454     Vals.push_back(getElement(Elements[i]));
 455   }
 456   return new ListInit(Vals, getType());
 457 }
 458
 459 Record *ListInit::getElementAsRecord(unsigned i) const {
 460   assert(i < Values.size() && "List element index out of range!");
 461   DefInit *DI = dynamic_cast<DefInit*>(Values[i]);
 462   if (DI == 0) throw "Expected record in list!";
 463   return DI->getDef();
 464 }
 465
 466 Init *ListInit::resolveReferences(Record &R, const RecordVal *RV) {
 467   std::vector<Init*> Resolved;
 468   Resolved.reserve(getSize());
 469   bool Changed = false;
 470
 471   for (unsigned i = 0, e = getSize(); i != e; ++i) {
 472     Init *E;
 473     Init *CurElt = getElement(i);
 474
 475     do {
 476       E = CurElt;
 477       CurElt = CurElt->resolveReferences(R, RV);
 478       Changed |= E != CurElt;
 479     } while (E != CurElt);
 480     Resolved.push_back(E);
 481   }
 482
 483   if (Changed)
 484     return new ListInit(Resolved, getType());
 485   return this;
 486 }
 487
 488 Init *ListInit::resolveListElementReference(Record &R, const RecordVal *IRV,
 489                                            unsigned Elt) {
 490   if (Elt >= getSize())
 491     return 0;  // Out of range reference.
 492   Init *E = getElement(Elt);
 493   if (!dynamic_cast<UnsetInit*>(E))  // If the element is set
 494     return E;                        // Replace the VarListElementInit with it.
 495   return 0;
 496 }
 497
 498 std::string ListInit::getAsString() const {
 499   std::string Result = "[";
 500   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
 501     if (i) Result += ", ";
 502     Result += Values[i]->getAsString();
 503   }
 504   return Result + "]";
 505 }
 506
 507 Init *OpInit::resolveBitReference(Record &R, const RecordVal *IRV,
 508                                    unsigned Bit) {
 509   Init *Folded = Fold(&R, 0);
 510
 511   if (Folded != this) {
 512     TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
 513     if (Typed) {
 514       return Typed->resolveBitReference(R, IRV, Bit);
 515     }
 516   }
 517
 518   return 0;
 519 }
 520
 521 Init *OpInit::resolveListElementReference(Record &R, const RecordVal *IRV,
 522                                            unsigned Elt) {
 523   Init *Folded = Fold(&R, 0);
 524
 525   if (Folded != this) {
 526     TypedInit *Typed = dynamic_cast<TypedInit *>(Folded);
 527     if (Typed) {
 528       return Typed->resolveListElementReference(R, IRV, Elt);
 529     }
 530   }
 531
 532   return 0;
 533 }
 534
 535 Init *UnOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 536   switch (getOpcode()) {
 537   default: assert(0 && "Unknown unop");
 538   case CAST: {
 539     if (getType()->getAsString() == "string") {
 540       StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 541       if (LHSs) {
 542         return LHSs;
 543       }
 544
 545       DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
 546       if (LHSd) {
 547         return new StringInit(LHSd->getDef()->getName());
 548       }
 549     }
 550     else {
 551       StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 552       if (LHSs) {
 553         std::string Name = LHSs->getValue();
 554
 555         // From TGParser::ParseIDValue
 556         if (CurRec) {
 557           if (const RecordVal *RV = CurRec->getValue(Name)) {
 558             if (RV->getType() != getType()) {
 559               throw "type mismatch in nameconcat";
 560             }
 561             return new VarInit(Name, RV->getType());
 562           }
 563
 564           std::string TemplateArgName = CurRec->getName()+":"+Name;
 565           if (CurRec->isTemplateArg(TemplateArgName)) {
 566             const RecordVal *RV = CurRec->getValue(TemplateArgName);
 567             assert(RV && "Template arg doesn't exist??");
 568
 569             if (RV->getType() != getType()) {
 570               throw "type mismatch in nameconcat";
 571             }
 572
 573             return new VarInit(TemplateArgName, RV->getType());
 574           }
 575         }
 576
 577         if (CurMultiClass) {
 578           std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
 579           if (CurMultiClass->Rec.isTemplateArg(MCName)) {
 580             const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
 581             assert(RV && "Template arg doesn't exist??");
 582
 583             if (RV->getType() != getType()) {
 584               throw "type mismatch in nameconcat";
 585             }
 586
 587             return new VarInit(MCName, RV->getType());
 588           }
 589         }
 590
 591         if (Record *D = Records.getDef(Name))
 592           return new DefInit(D);
 593
 594         errs() << "Variable not defined: '" + Name + "'\n";
 595         assert(0 && "Variable not found");
 596         return 0;
 597       }
 598     }
 599     break;
 600   }
 601   case CAR: {
 602     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 603     if (LHSl) {
 604       if (LHSl->getSize() == 0) {
 605         assert(0 && "Empty list in car");
 606         return 0;
 607       }
 608       return LHSl->getElement(0);
 609     }
 610     break;
 611   }
 612   case CDR: {
 613     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 614     if (LHSl) {
 615       if (LHSl->getSize() == 0) {
 616         assert(0 && "Empty list in cdr");
 617         return 0;
 618       }
 619       ListInit *Result = new ListInit(LHSl->begin()+1, LHSl->end(), LHSl->getType());
 620       return Result;
 621     }
 622     break;
 623   }
 624   case LNULL: {
 625     ListInit *LHSl = dynamic_cast<ListInit*>(LHS);
 626     if (LHSl) {
 627       if (LHSl->getSize() == 0) {
 628         return new IntInit(1);
 629       }
 630       else {
 631         return new IntInit(0);
 632       }
 633     }
 634     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 635     if (LHSs) {
 636       if (LHSs->getValue().empty()) {
 637         return new IntInit(1);
 638       }
 639       else {
 640         return new IntInit(0);
 641       }
 642     }
 643
 644     break;
 645   }
 646   }
 647   return this;
 648 }
 649
 650 Init *UnOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 651   Init *lhs = LHS->resolveReferences(R, RV);
 652
 653   if (LHS != lhs)
 654     return (new UnOpInit(getOpcode(), lhs, getType()))->Fold(&R, 0);
 655   return Fold(&R, 0);
 656 }
 657
 658 std::string UnOpInit::getAsString() const {
 659   std::string Result;
 660   switch (Opc) {
 661   case CAST: Result = "!cast<" + getType()->getAsString() + ">"; break;
 662   case CAR: Result = "!car"; break;
 663   case CDR: Result = "!cdr"; break;
 664   case LNULL: Result = "!null"; break;
 665   }
 666   return Result + "(" + LHS->getAsString() + ")";
 667 }
 668
 669 RecTy *UnOpInit::getFieldType(const std::string &FieldName) const {
 670   switch (getOpcode()) {
 671   default: assert(0 && "Unknown unop");
 672   case CAST: {
 673     RecordRecTy *RecordType = dynamic_cast<RecordRecTy *>(getType());
 674     if (RecordType) {
 675       RecordVal *Field = RecordType->getRecord()->getValue(FieldName);
 676       if (Field) {
 677         return Field->getType();
 678       }
 679     }
 680     break;
 681   }
 682   }
 683   return 0;
 684 }
 685
 686 Init *BinOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 687   switch (getOpcode()) {
 688   default: assert(0 && "Unknown binop");
 689   case CONCAT: {
 690     DagInit *LHSs = dynamic_cast<DagInit*>(LHS);
 691     DagInit *RHSs = dynamic_cast<DagInit*>(RHS);
 692     if (LHSs && RHSs) {
 693       DefInit *LOp = dynamic_cast<DefInit*>(LHSs->getOperator());
 694       DefInit *ROp = dynamic_cast<DefInit*>(RHSs->getOperator());
 695       if (LOp->getDef() != ROp->getDef()) {
 696         bool LIsOps =
 697           LOp->getDef()->getName() == "outs" ||
 698           LOp->getDef()->getName() != "ins" ||
 699           LOp->getDef()->getName() != "defs";
 700         bool RIsOps =
 701           ROp->getDef()->getName() == "outs" ||
 702           ROp->getDef()->getName() != "ins" ||
 703           ROp->getDef()->getName() != "defs";
 704         if (!LIsOps || !RIsOps)
 705           throw "Concated Dag operators do not match!";
 706       }
 707       std::vector<Init*> Args;
 708       std::vector<std::string> ArgNames;
 709       for (unsigned i = 0, e = LHSs->getNumArgs(); i != e; ++i) {
 710         Args.push_back(LHSs->getArg(i));
 711         ArgNames.push_back(LHSs->getArgName(i));
 712       }
 713       for (unsigned i = 0, e = RHSs->getNumArgs(); i != e; ++i) {
 714         Args.push_back(RHSs->getArg(i));
 715         ArgNames.push_back(RHSs->getArgName(i));
 716       }
 717       return new DagInit(LHSs->getOperator(), "", Args, ArgNames);
 718     }
 719     break;
 720   }
 721   case STRCONCAT: {
 722     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 723     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 724     if (LHSs && RHSs)
 725       return new StringInit(LHSs->getValue() + RHSs->getValue());
 726     break;
 727   }
 728   case NAMECONCAT: {
 729     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 730     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 731     if (LHSs && RHSs) {
 732       std::string Name(LHSs->getValue() + RHSs->getValue());
 733
 734       // From TGParser::ParseIDValue
 735       if (CurRec) {
 736         if (const RecordVal *RV = CurRec->getValue(Name)) {
 737           if (RV->getType() != getType()) {
 738             throw "type mismatch in nameconcat";
 739           }
 740           return new VarInit(Name, RV->getType());
 741         }
 742
 743         std::string TemplateArgName = CurRec->getName()+":"+Name;
 744         if (CurRec->isTemplateArg(TemplateArgName)) {
 745           const RecordVal *RV = CurRec->getValue(TemplateArgName);
 746           assert(RV && "Template arg doesn't exist??");
 747
 748           if (RV->getType() != getType()) {
 749             throw "type mismatch in nameconcat";
 750           }
 751
 752           return new VarInit(TemplateArgName, RV->getType());
 753         }
 754       }
 755
 756       if (CurMultiClass) {
 757         std::string MCName = CurMultiClass->Rec.getName()+"::"+Name;
 758         if (CurMultiClass->Rec.isTemplateArg(MCName)) {
 759           const RecordVal *RV = CurMultiClass->Rec.getValue(MCName);
 760           assert(RV && "Template arg doesn't exist??");
 761
 762           if (RV->getType() != getType()) {
 763             throw "type mismatch in nameconcat";
 764           }
 765
 766           return new VarInit(MCName, RV->getType());
 767         }
 768       }
 769
 770       if (Record *D = Records.getDef(Name))
 771         return new DefInit(D);
 772
 773       errs() << "Variable not defined in !nameconcat: '" + Name + "'\n";
 774       assert(0 && "Variable not found in !nameconcat");
 775       return 0;
 776     }
 777     break;
 778   }
 779   case SHL:
 780   case SRA:
 781   case SRL: {
 782     IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
 783     IntInit *RHSi = dynamic_cast<IntInit*>(RHS);
 784     if (LHSi && RHSi) {
 785       int64_t LHSv = LHSi->getValue(), RHSv = RHSi->getValue();
 786       int64_t Result;
 787       switch (getOpcode()) {
 788       default: assert(0 && "Bad opcode!");
 789       case SHL: Result = LHSv << RHSv; break;
 790       case SRA: Result = LHSv >> RHSv; break;
 791       case SRL: Result = (uint64_t)LHSv >> (uint64_t)RHSv; break;
 792       }
 793       return new IntInit(Result);
 794     }
 795     break;
 796   }
 797   }
 798   return this;
 799 }
 800
 801 Init *BinOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 802   Init *lhs = LHS->resolveReferences(R, RV);
 803   Init *rhs = RHS->resolveReferences(R, RV);
 804
 805   if (LHS != lhs || RHS != rhs)
 806     return (new BinOpInit(getOpcode(), lhs, rhs, getType()))->Fold(&R, 0);
 807   return Fold(&R, 0);
 808 }
 809
 810 std::string BinOpInit::getAsString() const {
 811   std::string Result;
 812   switch (Opc) {
 813   case CONCAT: Result = "!con"; break;
 814   case SHL: Result = "!shl"; break;
 815   case SRA: Result = "!sra"; break;
 816   case SRL: Result = "!srl"; break;
 817   case STRCONCAT: Result = "!strconcat"; break;
 818   case NAMECONCAT:
 819     Result = "!nameconcat<" + getType()->getAsString() + ">"; break;
 820   }
 821   return Result + "(" + LHS->getAsString() + ", " + RHS->getAsString() + ")";
 822 }
 823
 824 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
 825                            Record *CurRec, MultiClass *CurMultiClass);
 826
 827 static Init *EvaluateOperation(OpInit *RHSo, Init *LHS, Init *Arg,
 828                                RecTy *Type, Record *CurRec,
 829                                MultiClass *CurMultiClass) {
 830   std::vector<Init *> NewOperands;
 831
 832   TypedInit *TArg = dynamic_cast<TypedInit*>(Arg);
 833
 834   // If this is a dag, recurse
 835   if (TArg && TArg->getType()->getAsString() == "dag") {
 836     Init *Result = ForeachHelper(LHS, Arg, RHSo, Type,
 837                                  CurRec, CurMultiClass);
 838     if (Result != 0) {
 839       return Result;
 840     }
 841     else {
 842       return 0;
 843     }
 844   }
 845
 846   for (int i = 0; i < RHSo->getNumOperands(); ++i) {
 847     OpInit *RHSoo = dynamic_cast<OpInit*>(RHSo->getOperand(i));
 848
 849     if (RHSoo) {
 850       Init *Result = EvaluateOperation(RHSoo, LHS, Arg,
 851                                        Type, CurRec, CurMultiClass);
 852       if (Result != 0) {
 853         NewOperands.push_back(Result);
 854       }
 855       else {
 856         NewOperands.push_back(Arg);
 857       }
 858     }
 859     else if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
 860       NewOperands.push_back(Arg);
 861     }
 862     else {
 863       NewOperands.push_back(RHSo->getOperand(i));
 864     }
 865   }
 866
 867   // Now run the operator and use its result as the new leaf
 868   OpInit *NewOp = RHSo->clone(NewOperands);
 869   Init *NewVal = NewOp->Fold(CurRec, CurMultiClass);
 870   if (NewVal != NewOp) {
 871     delete NewOp;
 872     return NewVal;
 873   }
 874   return 0;
 875 }
 876
 877 static Init *ForeachHelper(Init *LHS, Init *MHS, Init *RHS, RecTy *Type,
 878                            Record *CurRec, MultiClass *CurMultiClass) {
 879   DagInit *MHSd = dynamic_cast<DagInit*>(MHS);
 880   ListInit *MHSl = dynamic_cast<ListInit*>(MHS);
 881
 882   DagRecTy *DagType = dynamic_cast<DagRecTy*>(Type);
 883   ListRecTy *ListType = dynamic_cast<ListRecTy*>(Type);
 884
 885   OpInit *RHSo = dynamic_cast<OpInit*>(RHS);
 886
 887   if (!RHSo) {
 888     errs() << "!foreach requires an operator\n";
 889     assert(0 && "No operator for !foreach");
 890   }
 891
 892   TypedInit *LHSt = dynamic_cast<TypedInit*>(LHS);
 893
 894   if (!LHSt) {
 895     errs() << "!foreach requires typed variable\n";
 896     assert(0 && "No typed variable for !foreach");
 897   }
 898
 899   if ((MHSd && DagType) || (MHSl && ListType)) {
 900     if (MHSd) {
 901       Init *Val = MHSd->getOperator();
 902       Init *Result = EvaluateOperation(RHSo, LHS, Val,
 903                                        Type, CurRec, CurMultiClass);
 904       if (Result != 0) {
 905         Val = Result;
 906       }
 907
 908       std::vector<std::pair<Init *, std::string> > args;
 909       for (unsigned int i = 0; i < MHSd->getNumArgs(); ++i) {
 910         Init *Arg;
 911         std::string ArgName;
 912         Arg = MHSd->getArg(i);
 913         ArgName = MHSd->getArgName(i);
 914
 915         // Process args
 916         Init *Result = EvaluateOperation(RHSo, LHS, Arg, Type,
 917                                          CurRec, CurMultiClass);
 918         if (Result != 0) {
 919           Arg = Result;
 920         }
 921
 922         // TODO: Process arg names
 923         args.push_back(std::make_pair(Arg, ArgName));
 924       }
 925
 926       return new DagInit(Val, "", args);
 927     }
 928     if (MHSl) {
 929       std::vector<Init *> NewOperands;
 930       std::vector<Init *> NewList(MHSl->begin(), MHSl->end());
 931
 932       for (ListInit::iterator li = NewList.begin(),
 933              liend = NewList.end();
 934            li != liend;
 935            ++li) {
 936         Init *Item = *li;
 937         NewOperands.clear();
 938         for(int i = 0; i < RHSo->getNumOperands(); ++i) {
 939           // First, replace the foreach variable with the list item
 940           if (LHS->getAsString() == RHSo->getOperand(i)->getAsString()) {
 941             NewOperands.push_back(Item);
 942           }
 943           else {
 944             NewOperands.push_back(RHSo->getOperand(i));
 945           }
 946         }
 947
 948         // Now run the operator and use its result as the new list item
 949         OpInit *NewOp = RHSo->clone(NewOperands);
 950         Init *NewItem = NewOp->Fold(CurRec, CurMultiClass);
 951         if (NewItem != NewOp) {
 952           *li = NewItem;
 953           delete NewOp;
 954         }
 955       }
 956       return new ListInit(NewList, MHSl->getType());
 957     }
 958   }
 959   return 0;
 960 }
 961
 962 Init *TernOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) {
 963   switch (getOpcode()) {
 964   default: assert(0 && "Unknown binop");
 965   case SUBST: {
 966     DefInit *LHSd = dynamic_cast<DefInit*>(LHS);
 967     VarInit *LHSv = dynamic_cast<VarInit*>(LHS);
 968     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 969
 970     DefInit *MHSd = dynamic_cast<DefInit*>(MHS);
 971     VarInit *MHSv = dynamic_cast<VarInit*>(MHS);
 972     StringInit *MHSs = dynamic_cast<StringInit*>(MHS);
 973
 974     DefInit *RHSd = dynamic_cast<DefInit*>(RHS);
 975     VarInit *RHSv = dynamic_cast<VarInit*>(RHS);
 976     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 977
 978     if ((LHSd && MHSd && RHSd)
 979         || (LHSv && MHSv && RHSv)
 980         || (LHSs && MHSs && RHSs)) {
 981       if (RHSd) {
 982         Record *Val = RHSd->getDef();
 983         if (LHSd->getAsString() == RHSd->getAsString()) {
 984           Val = MHSd->getDef();
 985         }
 986         return new DefInit(Val);
 987       }
 988       if (RHSv) {
 989         std::string Val = RHSv->getName();
 990         if (LHSv->getAsString() == RHSv->getAsString()) {
 991           Val = MHSv->getName();
 992         }
 993         return new VarInit(Val, getType());
 994       }
 995       if (RHSs) {
 996         std::string Val = RHSs->getValue();
 997
 998         std::string::size_type found;
 999         do {
1000           found = Val.find(LHSs->getValue());
1001           if (found != std::string::npos) {
1002             Val.replace(found, LHSs->getValue().size(), MHSs->getValue());
1003           }
1004         } while (found != std::string::npos);
1005
1006         return new StringInit(Val);
1007       }
1008     }
1009     break;
1010   }
1011
1012   case FOREACH: {
1013     Init *Result = ForeachHelper(LHS, MHS, RHS, getType(),
1014                                  CurRec, CurMultiClass);
1015     if (Result != 0) {
1016       return Result;
1017     }
1018     break;
1019   }
1020
1021   case IF: {
1022     IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
1023     if (LHSi) {
1024       if (LHSi->getValue()) {
1025         return MHS;
1026       }
1027       else {
1028         return RHS;
1029       }
1030     }
1031     break;
1032   }
1033   }
1034
1035   return this;
1036 }
1037
1038 Init *TernOpInit::resolveReferences(Record &R, const RecordVal *RV) {
1039   Init *lhs = LHS->resolveReferences(R, RV);
1040
1041   if (Opc == IF && lhs != LHS) {
1042     IntInit *Value = dynamic_cast<IntInit*>(lhs);
1043     if (Value != 0) {
1044       // Short-circuit
1045       if (Value->getValue()) {
1046         Init *mhs = MHS->resolveReferences(R, RV);
1047         return (new TernOpInit(getOpcode(), lhs, mhs, RHS, getType()))->Fold(&R, 0);
1048       }
1049       else {
1050         Init *rhs = RHS->resolveReferences(R, RV);
1051         return (new TernOpInit(getOpcode(), lhs, MHS, rhs, getType()))->Fold(&R, 0);
1052       }
1053     }
1054   }
1055
1056   Init *mhs = MHS->resolveReferences(R, RV);
1057   Init *rhs = RHS->resolveReferences(R, RV);
1058
1059   if (LHS != lhs || MHS != mhs || RHS != rhs)
1060     return (new TernOpInit(getOpcode(), lhs, mhs, rhs, getType()))->Fold(&R, 0);
1061   return Fold(&R, 0);
1062 }
1063
1064 std::string TernOpInit::getAsString() const {
1065   std::string Result;
1066   switch (Opc) {
1067   case SUBST: Result = "!subst"; break;
1068   case FOREACH: Result = "!foreach"; break;
1069   case IF: Result = "!if"; break;
1070  }
1071   return Result + "(" + LHS->getAsString() + ", " + MHS->getAsString() + ", "
1072     + RHS->getAsString() + ")";
1073 }
1074
1075 Init *TypedInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
1076   BitsRecTy *T = dynamic_cast<BitsRecTy*>(getType());
1077   if (T == 0) return 0;  // Cannot subscript a non-bits variable...
1078   unsigned NumBits = T->getNumBits();
1079
1080   BitsInit *BI = new BitsInit(Bits.size());
1081   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
1082     if (Bits[i] >= NumBits) {
1083       delete BI;
1084       return 0;
1085     }
1086     BI->setBit(i, new VarBitInit(this, Bits[i]));
1087   }
1088   return BI;
1089 }
1090
1091 Init *TypedInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
1092   ListRecTy *T = dynamic_cast<ListRecTy*>(getType());
1093   if (T == 0) return 0;  // Cannot subscript a non-list variable...
1094
1095   if (Elements.size() == 1)
1096     return new VarListElementInit(this, Elements[0]);
1097
1098   std::vector<Init*> ListInits;
1099   ListInits.reserve(Elements.size());
1100   for (unsigned i = 0, e = Elements.size(); i != e; ++i)
1101     ListInits.push_back(new VarListElementInit(this, Elements[i]));
1102   return new ListInit(ListInits, T);
1103 }
1104
1105
1106 Init *VarInit::resolveBitReference(Record &R, const RecordVal *IRV,
1107                                    unsigned Bit) {
1108   if (R.isTemplateArg(getName())) return 0;
1109   if (IRV && IRV->getName() != getName()) return 0;
1110
1111   RecordVal *RV = R.getValue(getName());
1112   assert(RV && "Reference to a non-existant variable?");
1113   assert(dynamic_cast<BitsInit*>(RV->getValue()));
1114   BitsInit *BI = (BitsInit*)RV->getValue();
1115
1116   assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1117   Init *B = BI->getBit(Bit);
1118
1119   if (!dynamic_cast<UnsetInit*>(B))  // If the bit is not set...
1120     return B;                        // Replace the VarBitInit with it.
1121   return 0;
1122 }
1123
1124 Init *VarInit::resolveListElementReference(Record &R, const RecordVal *IRV,
1125                                            unsigned Elt) {
1126   if (R.isTemplateArg(getName())) return 0;
1127   if (IRV && IRV->getName() != getName()) return 0;
1128
1129   RecordVal *RV = R.getValue(getName());
1130   assert(RV && "Reference to a non-existant variable?");
1131   ListInit *LI = dynamic_cast<ListInit*>(RV->getValue());
1132   if (!LI) {
1133     VarInit *VI = dynamic_cast<VarInit*>(RV->getValue());
1134     assert(VI && "Invalid list element!");
1135     return new VarListElementInit(VI, Elt);
1136   }
1137
1138   if (Elt >= LI->getSize())
1139     return 0;  // Out of range reference.
1140   Init *E = LI->getElement(Elt);
1141   if (!dynamic_cast<UnsetInit*>(E))  // If the element is set
1142     return E;                        // Replace the VarListElementInit with it.
1143   return 0;
1144 }
1145
1146
1147 RecTy *VarInit::getFieldType(const std::string &FieldName) const {
1148   if (RecordRecTy *RTy = dynamic_cast<RecordRecTy*>(getType()))
1149     if (const RecordVal *RV = RTy->getRecord()->getValue(FieldName))
1150       return RV->getType();
1151   return 0;
1152 }
1153
1154 Init *VarInit::getFieldInit(Record &R, const std::string &FieldName) const {
1155   if (dynamic_cast<RecordRecTy*>(getType()))
1156     if (const RecordVal *RV = R.getValue(VarName)) {
1157       Init *TheInit = RV->getValue();
1158       assert(TheInit != this && "Infinite loop detected!");
1159       if (Init *I = TheInit->getFieldInit(R, FieldName))
1160         return I;
1161       else
1162         return 0;
1163     }
1164   return 0;
1165 }
1166
1167 /// resolveReferences - This method is used by classes that refer to other
1168 /// variables which may not be defined at the time they expression is formed.
1169 /// If a value is set for the variable later, this method will be called on
1170 /// users of the value to allow the value to propagate out.
1171 ///
1172 Init *VarInit::resolveReferences(Record &R, const RecordVal *RV) {
1173   if (RecordVal *Val = R.getValue(VarName))
1174     if (RV == Val || (RV == 0 && !dynamic_cast<UnsetInit*>(Val->getValue())))
1175       return Val->getValue();
1176   return this;
1177 }
1178
1179 std::string VarBitInit::getAsString() const {
1180    return TI->getAsString() + "{" + utostr(Bit) + "}";
1181 }
1182
1183 Init *VarBitInit::resolveReferences(Record &R, const RecordVal *RV) {
1184   if (Init *I = getVariable()->resolveBitReference(R, RV, getBitNum()))
1185     return I;
1186   return this;
1187 }
1188
1189 std::string VarListElementInit::getAsString() const {
1190   return TI->getAsString() + "[" + utostr(Element) + "]";
1191 }
1192
1193 Init *VarListElementInit::resolveReferences(Record &R, const RecordVal *RV) {
1194   if (Init *I = getVariable()->resolveListElementReference(R, RV,
1195                                                            getElementNum()))
1196     return I;
1197   return this;
1198 }
1199
1200 Init *VarListElementInit::resolveBitReference(Record &R, const RecordVal *RV,
1201                                               unsigned Bit) {
1202   // FIXME: This should be implemented, to support references like:
1203   // bit B = AA[0]{1};
1204   return 0;
1205 }
1206
1207 Init *VarListElementInit::
1208 resolveListElementReference(Record &R, const RecordVal *RV, unsigned Elt) {
1209   // FIXME: This should be implemented, to support references like:
1210   // int B = AA[0][1];
1211   return 0;
1212 }
1213
1214 RecTy *DefInit::getFieldType(const std::string &FieldName) const {
1215   if (const RecordVal *RV = Def->getValue(FieldName))
1216     return RV->getType();
1217   return 0;
1218 }
1219
1220 Init *DefInit::getFieldInit(Record &R, const std::string &FieldName) const {
1221   return Def->getValue(FieldName)->getValue();
1222 }
1223
1224
1225 std::string DefInit::getAsString() const {
1226   return Def->getName();
1227 }
1228
1229 Init *FieldInit::resolveBitReference(Record &R, const RecordVal *RV,
1230                                      unsigned Bit) {
1231   if (Init *BitsVal = Rec->getFieldInit(R, FieldName))
1232     if (BitsInit *BI = dynamic_cast<BitsInit*>(BitsVal)) {
1233       assert(Bit < BI->getNumBits() && "Bit reference out of range!");
1234       Init *B = BI->getBit(Bit);
1235
1236       if (dynamic_cast<BitInit*>(B))  // If the bit is set...
1237         return B;                     // Replace the VarBitInit with it.
1238     }
1239   return 0;
1240 }
1241
1242 Init *FieldInit::resolveListElementReference(Record &R, const RecordVal *RV,
1243                                              unsigned Elt) {
1244   if (Init *ListVal = Rec->getFieldInit(R, FieldName))
1245     if (ListInit *LI = dynamic_cast<ListInit*>(ListVal)) {
1246       if (Elt >= LI->getSize()) return 0;
1247       Init *E = LI->getElement(Elt);
1248
1249       if (!dynamic_cast<UnsetInit*>(E))  // If the bit is set...
1250         return E;                  // Replace the VarListElementInit with it.
1251     }
1252   return 0;
1253 }
1254
1255 Init *FieldInit::resolveReferences(Record &R, const RecordVal *RV) {
1256   Init *NewRec = RV ? Rec->resolveReferences(R, RV) : Rec;
1257
1258   Init *BitsVal = NewRec->getFieldInit(R, FieldName);
1259   if (BitsVal) {
1260     Init *BVR = BitsVal->resolveReferences(R, RV);
1261     return BVR->isComplete() ? BVR : this;
1262   }
1263
1264   if (NewRec != Rec) {
1265     return new FieldInit(NewRec, FieldName);
1266   }
1267   return this;
1268 }
1269
1270 Init *DagInit::resolveReferences(Record &R, const RecordVal *RV) {
1271   std::vector<Init*> NewArgs;
1272   for (unsigned i = 0, e = Args.size(); i != e; ++i)
1273     NewArgs.push_back(Args[i]->resolveReferences(R, RV));
1274
1275   Init *Op = Val->resolveReferences(R, RV);
1276
1277   if (Args != NewArgs || Op != Val)
1278     return new DagInit(Op, "", NewArgs, ArgNames);
1279
1280   return this;
1281 }
1282
1283
1284 std::string DagInit::getAsString() const {
1285   std::string Result = "(" + Val->getAsString();
1286   if (!ValName.empty())
1287     Result += ":" + ValName;
1288   if (Args.size()) {
1289     Result += " " + Args[0]->getAsString();
1290     if (!ArgNames[0].empty()) Result += ":$" + ArgNames[0];
1291     for (unsigned i = 1, e = Args.size(); i != e; ++i) {
1292       Result += ", " + Args[i]->getAsString();
1293       if (!ArgNames[i].empty()) Result += ":$" + ArgNames[i];
1294     }
1295   }
1296   return Result + ")";
1297 }
1298
1299
1300 //===----------------------------------------------------------------------===//
1301 //    Other implementations
1302 //===----------------------------------------------------------------------===//
1303
1304 RecordVal::RecordVal(const std::string &N, RecTy *T, unsigned P)
1305   : Name(N), Ty(T), Prefix(P) {
1306   Value = Ty->convertValue(new UnsetInit());
1307   assert(Value && "Cannot create unset value for current type!");
1308 }
1309
1310 void RecordVal::dump() const { errs() << *this; }
1311
1312 void RecordVal::print(raw_ostream &OS, bool PrintSem) const {
1313   if (getPrefix()) OS << "field ";
1314   OS << *getType() << " " << getName();
1315
1316   if (getValue())
1317     OS << " = " << *getValue();
1318
1319   if (PrintSem) OS << ";\n";
1320 }
1321
1322 unsigned Record::LastID = 0;
1323
1324 void Record::setName(const std::string &Name) {
1325   if (Records.getDef(getName()) == this) {
1326     Records.removeDef(getName());
1327     this->Name = Name;
1328     Records.addDef(this);
1329   } else {
1330     Records.removeClass(getName());
1331     this->Name = Name;
1332     Records.addClass(this);
1333   }
1334 }
1335
1336 /// resolveReferencesTo - If anything in this record refers to RV, replace the
1337 /// reference to RV with the RHS of RV.  If RV is null, we resolve all possible
1338 /// references.
1339 void Record::resolveReferencesTo(const RecordVal *RV) {
1340   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
1341     if (Init *V = Values[i].getValue())
1342       Values[i].setValue(V->resolveReferences(*this, RV));
1343   }
1344 }
1345
1346
1347 void Record::dump() const { errs() << *this; }
1348
1349 raw_ostream &llvm::operator<<(raw_ostream &OS, const Record &R) {
1350   OS << R.getName();
1351
1352   const std::vector<std::string> &TArgs = R.getTemplateArgs();
1353   if (!TArgs.empty()) {
1354     OS << "<";
1355     for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
1356       if (i) OS << ", ";
1357       const RecordVal *RV = R.getValue(TArgs[i]);
1358       assert(RV && "Template argument record not found??");
1359       RV->print(OS, false);
1360     }
1361     OS << ">";
1362   }
1363
1364   OS << " {";
1365   const std::vector<Record*> &SC = R.getSuperClasses();
1366   if (!SC.empty()) {
1367     OS << "\t//";
1368     for (unsigned i = 0, e = SC.size(); i != e; ++i)
1369       OS << " " << SC[i]->getName();
1370   }
1371   OS << "\n";
1372
1373   const std::vector<RecordVal> &Vals = R.getValues();
1374   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1375     if (Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1376       OS << Vals[i];
1377   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
1378     if (!Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
1379       OS << Vals[i];
1380
1381   return OS << "}\n";
1382 }
1383
1384 /// getValueInit - Return the initializer for a value with the specified name,
1385 /// or throw an exception if the field does not exist.
1386 ///
1387 Init *Record::getValueInit(const std::string &FieldName) const {
1388   const RecordVal *R = getValue(FieldName);
1389   if (R == 0 || R->getValue() == 0)
1390     throw "Record `" + getName() + "' does not have a field named `" +
1391       FieldName + "'!\n";
1392   return R->getValue();
1393 }
1394
1395
1396 /// getValueAsString - This method looks up the specified field and returns its
1397 /// value as a string, throwing an exception if the field does not exist or if
1398 /// the value is not a string.
1399 ///
1400 std::string Record::getValueAsString(const std::string &FieldName) const {
1401   const RecordVal *R = getValue(FieldName);
1402   if (R == 0 || R->getValue() == 0)
1403     throw "Record `" + getName() + "' does not have a field named `" +
1404           FieldName + "'!\n";
1405
1406   if (const StringInit *SI = dynamic_cast<const StringInit*>(R->getValue()))
1407     return SI->getValue();
1408   throw "Record `" + getName() + "', field `" + FieldName +
1409         "' does not have a string initializer!";
1410 }
1411
1412 /// getValueAsBitsInit - This method looks up the specified field and returns
1413 /// its value as a BitsInit, throwing an exception if the field does not exist
1414 /// or if the value is not the right type.
1415 ///
1416 BitsInit *Record::getValueAsBitsInit(const std::string &FieldName) const {
1417   const RecordVal *R = getValue(FieldName);
1418   if (R == 0 || R->getValue() == 0)
1419     throw "Record `" + getName() + "' does not have a field named `" +
1420           FieldName + "'!\n";
1421
1422   if (BitsInit *BI = dynamic_cast<BitsInit*>(R->getValue()))
1423     return BI;
1424   throw "Record `" + getName() + "', field `" + FieldName +
1425         "' does not have a BitsInit initializer!";
1426 }
1427
1428 /// getValueAsListInit - This method looks up the specified field and returns
1429 /// its value as a ListInit, throwing an exception if the field does not exist
1430 /// or if the value is not the right type.
1431 ///
1432 ListInit *Record::getValueAsListInit(const std::string &FieldName) const {
1433   const RecordVal *R = getValue(FieldName);
1434   if (R == 0 || R->getValue() == 0)
1435     throw "Record `" + getName() + "' does not have a field named `" +
1436           FieldName + "'!\n";
1437
1438   if (ListInit *LI = dynamic_cast<ListInit*>(R->getValue()))
1439     return LI;
1440   throw "Record `" + getName() + "', field `" + FieldName +
1441         "' does not have a list initializer!";
1442 }
1443
1444 /// getValueAsListOfDefs - This method looks up the specified field and returns
1445 /// its value as a vector of records, throwing an exception if the field does
1446 /// not exist or if the value is not the right type.
1447 ///
1448 std::vector<Record*>
1449 Record::getValueAsListOfDefs(const std::string &FieldName) const {
1450   ListInit *List = getValueAsListInit(FieldName);
1451   std::vector<Record*> Defs;
1452   for (unsigned i = 0; i < List->getSize(); i++) {
1453     if (DefInit *DI = dynamic_cast<DefInit*>(List->getElement(i))) {
1454       Defs.push_back(DI->getDef());
1455     } else {
1456       throw "Record `" + getName() + "', field `" + FieldName +
1457             "' list is not entirely DefInit!";
1458     }
1459   }
1460   return Defs;
1461 }
1462
1463 /// getValueAsInt - This method looks up the specified field and returns its
1464 /// value as an int64_t, throwing an exception if the field does not exist or if
1465 /// the value is not the right type.
1466 ///
1467 int64_t Record::getValueAsInt(const std::string &FieldName) const {
1468   const RecordVal *R = getValue(FieldName);
1469   if (R == 0 || R->getValue() == 0)
1470     throw "Record `" + getName() + "' does not have a field named `" +
1471           FieldName + "'!\n";
1472
1473   if (IntInit *II = dynamic_cast<IntInit*>(R->getValue()))
1474     return II->getValue();
1475   throw "Record `" + getName() + "', field `" + FieldName +
1476         "' does not have an int initializer!";
1477 }
1478
1479 /// getValueAsListOfInts - This method looks up the specified field and returns
1480 /// its value as a vector of integers, throwing an exception if the field does
1481 /// not exist or if the value is not the right type.
1482 ///
1483 std::vector<int64_t>
1484 Record::getValueAsListOfInts(const std::string &FieldName) const {
1485   ListInit *List = getValueAsListInit(FieldName);
1486   std::vector<int64_t> Ints;
1487   for (unsigned i = 0; i < List->getSize(); i++) {
1488     if (IntInit *II = dynamic_cast<IntInit*>(List->getElement(i))) {
1489       Ints.push_back(II->getValue());
1490     } else {
1491       throw "Record `" + getName() + "', field `" + FieldName +
1492             "' does not have a list of ints initializer!";
1493     }
1494   }
1495   return Ints;
1496 }
1497
1498 /// getValueAsDef - This method looks up the specified field and returns its
1499 /// value as a Record, throwing an exception if the field does not exist or if
1500 /// the value is not the right type.
1501 ///
1502 Record *Record::getValueAsDef(const std::string &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 + "'!\n";
1507
1508   if (DefInit *DI = dynamic_cast<DefInit*>(R->getValue()))
1509     return DI->getDef();
1510   throw "Record `" + getName() + "', field `" + FieldName +
1511         "' does not have a def initializer!";
1512 }
1513
1514 /// getValueAsBit - This method looks up the specified field and returns its
1515 /// value as a bit, throwing an exception if the field does not exist or if
1516 /// the value is not the right type.
1517 ///
1518 bool Record::getValueAsBit(const std::string &FieldName) const {
1519   const RecordVal *R = getValue(FieldName);
1520   if (R == 0 || R->getValue() == 0)
1521     throw "Record `" + getName() + "' does not have a field named `" +
1522       FieldName + "'!\n";
1523
1524   if (BitInit *BI = dynamic_cast<BitInit*>(R->getValue()))
1525     return BI->getValue();
1526   throw "Record `" + getName() + "', field `" + FieldName +
1527         "' does not have a bit initializer!";
1528 }
1529
1530 /// getValueAsDag - This method looks up the specified field and returns its
1531 /// value as an Dag, throwing an exception if the field does not exist or if
1532 /// the value is not the right type.
1533 ///
1534 DagInit *Record::getValueAsDag(const std::string &FieldName) const {
1535   const RecordVal *R = getValue(FieldName);
1536   if (R == 0 || R->getValue() == 0)
1537     throw "Record `" + getName() + "' does not have a field named `" +
1538       FieldName + "'!\n";
1539
1540   if (DagInit *DI = dynamic_cast<DagInit*>(R->getValue()))
1541     return DI;
1542   throw "Record `" + getName() + "', field `" + FieldName +
1543         "' does not have a dag initializer!";
1544 }
1545
1546 std::string Record::getValueAsCode(const std::string &FieldName) const {
1547   const RecordVal *R = getValue(FieldName);
1548   if (R == 0 || R->getValue() == 0)
1549     throw "Record `" + getName() + "' does not have a field named `" +
1550       FieldName + "'!\n";
1551
1552   if (const CodeInit *CI = dynamic_cast<const CodeInit*>(R->getValue()))
1553     return CI->getValue();
1554   throw "Record `" + getName() + "', field `" + FieldName +
1555     "' does not have a code initializer!";
1556 }
1557
1558
1559 void MultiClass::dump() const {
1560   errs() << "Record:\n";
1561   Rec.dump();
1562
1563   errs() << "Defs:\n";
1564   for (RecordVector::const_iterator r = DefPrototypes.begin(),
1565          rend = DefPrototypes.end();
1566        r != rend;
1567        ++r) {
1568     (*r)->dump();
1569   }
1570 }
1571
1572
1573 void RecordKeeper::dump() const { errs() << *this; }
1574
1575 raw_ostream &llvm::operator<<(raw_ostream &OS, const RecordKeeper &RK) {
1576   OS << "------------- Classes -----------------\n";
1577   const std::map<std::string, Record*> &Classes = RK.getClasses();
1578   for (std::map<std::string, Record*>::const_iterator I = Classes.begin(),
1579          E = Classes.end(); I != E; ++I)
1580     OS << "class " << *I->second;
1581
1582   OS << "------------- Defs -----------------\n";
1583   const std::map<std::string, Record*> &Defs = RK.getDefs();
1584   for (std::map<std::string, Record*>::const_iterator I = Defs.begin(),
1585          E = Defs.end(); I != E; ++I)
1586     OS << "def " << *I->second;
1587   return OS;
1588 }
1589
1590
1591 /// getAllDerivedDefinitions - This method returns all concrete definitions
1592 /// that derive from the specified class name.  If a class with the specified
1593 /// name does not exist, an error is printed and true is returned.
1594 std::vector<Record*>
1595 RecordKeeper::getAllDerivedDefinitions(const std::string &ClassName) const {
1596   Record *Class = Records.getClass(ClassName);
1597   if (!Class)
1598     throw "ERROR: Couldn't find the `" + ClassName + "' class!\n";
1599
1600   std::vector<Record*> Defs;
1601   for (std::map<std::string, Record*>::const_iterator I = getDefs().begin(),
1602          E = getDefs().end(); I != E; ++I)
1603     if (I->second->isSubClassOf(Class))
1604       Defs.push_back(I->second);
1605
1606   return Defs;
1607 }
1608