utils/TableGen/Record.cpp

   1 //===- Record.cpp - Record implementation ---------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // Implement the tablegen record classes.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "Record.h"
  15 #include "llvm/Support/DataTypes.h"
  16 #include "llvm/Support/Streams.h"
  17 #include "llvm/ADT/StringExtras.h"
  18 #include <ios>
  19
  20 using namespace llvm;
  21
  22 //===----------------------------------------------------------------------===//
  23 //    Type implementations
  24 //===----------------------------------------------------------------------===//
  25
  26 void RecTy::dump() const { print(*cerr.stream()); }
  27
  28 Init *BitRecTy::convertValue(BitsInit *BI) {
  29   if (BI->getNumBits() != 1) return 0; // Only accept if just one bit!
  30   return BI->getBit(0);
  31 }
  32
  33 bool BitRecTy::baseClassOf(const BitsRecTy *RHS) const {
  34   return RHS->getNumBits() == 1;
  35 }
  36
  37 Init *BitRecTy::convertValue(IntInit *II) {
  38   int Val = II->getValue();
  39   if (Val != 0 && Val != 1) return 0;  // Only accept 0 or 1 for a bit!
  40
  41   return new BitInit(Val != 0);
  42 }
  43
  44 Init *BitRecTy::convertValue(TypedInit *VI) {
  45   if (dynamic_cast<BitRecTy*>(VI->getType()))
  46     return VI;  // Accept variable if it is already of bit type!
  47   return 0;
  48 }
  49
  50 std::string BitsRecTy::getAsString() const {
  51   return "bits<" + utostr(Size) + ">";
  52 }
  53
  54 Init *BitsRecTy::convertValue(UnsetInit *UI) {
  55   BitsInit *Ret = new BitsInit(Size);
  56
  57   for (unsigned i = 0; i != Size; ++i)
  58     Ret->setBit(i, new UnsetInit());
  59   return Ret;
  60 }
  61
  62 Init *BitsRecTy::convertValue(BitInit *UI) {
  63   if (Size != 1) return 0;  // Can only convert single bit...
  64   BitsInit *Ret = new BitsInit(1);
  65   Ret->setBit(0, UI);
  66   return Ret;
  67 }
  68
  69 // convertValue from Int initializer to bits type: Split the integer up into the
  70 // appropriate bits...
  71 //
  72 Init *BitsRecTy::convertValue(IntInit *II) {
  73   int64_t Value = II->getValue();
  74   // Make sure this bitfield is large enough to hold the integer value...
  75   if (Value >= 0) {
  76     if (Value & ~((1LL << Size)-1))
  77       return 0;
  78   } else {
  79     if ((Value >> Size) != -1 || ((Value & (1LL << (Size-1))) == 0))
  80       return 0;
  81   }
  82
  83   BitsInit *Ret = new BitsInit(Size);
  84   for (unsigned i = 0; i != Size; ++i)
  85     Ret->setBit(i, new BitInit(Value & (1LL << i)));
  86
  87   return Ret;
  88 }
  89
  90 Init *BitsRecTy::convertValue(BitsInit *BI) {
  91   // If the number of bits is right, return it.  Otherwise we need to expand or
  92   // truncate...
  93   if (BI->getNumBits() == Size) return BI;
  94   return 0;
  95 }
  96
  97 Init *BitsRecTy::convertValue(TypedInit *VI) {
  98   if (BitsRecTy *BRT = dynamic_cast<BitsRecTy*>(VI->getType()))
  99     if (BRT->Size == Size) {
 100       BitsInit *Ret = new BitsInit(Size);
 101       for (unsigned i = 0; i != Size; ++i)
 102         Ret->setBit(i, new VarBitInit(VI, i));
 103       return Ret;
 104     }
 105   if (Size == 1 && dynamic_cast<BitRecTy*>(VI->getType())) {
 106     BitsInit *Ret = new BitsInit(1);
 107     Ret->setBit(0, VI);
 108     return Ret;
 109   }
 110
 111   return 0;
 112 }
 113
 114 Init *IntRecTy::convertValue(BitInit *BI) {
 115   return new IntInit(BI->getValue());
 116 }
 117
 118 Init *IntRecTy::convertValue(BitsInit *BI) {
 119   int Result = 0;
 120   for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
 121     if (BitInit *Bit = dynamic_cast<BitInit*>(BI->getBit(i))) {
 122       Result |= Bit->getValue() << i;
 123     } else {
 124       return 0;
 125     }
 126   return new IntInit(Result);
 127 }
 128
 129 Init *IntRecTy::convertValue(TypedInit *TI) {
 130   if (TI->getType()->typeIsConvertibleTo(this))
 131     return TI;  // Accept variable if already of the right type!
 132   return 0;
 133 }
 134
 135 Init *StringRecTy::convertValue(BinOpInit *BO) {
 136   if (BO->getOpcode() == BinOpInit::STRCONCAT) {
 137     Init *L = BO->getLHS()->convertInitializerTo(this);
 138     Init *R = BO->getRHS()->convertInitializerTo(this);
 139     if (L == 0 || R == 0) return 0;
 140     if (L != BO->getLHS() || R != BO->getRHS())
 141       return new BinOpInit(BinOpInit::STRCONCAT, L, R);
 142     return BO;
 143   }
 144   return 0;
 145 }
 146
 147
 148 Init *StringRecTy::convertValue(TypedInit *TI) {
 149   if (dynamic_cast<StringRecTy*>(TI->getType()))
 150     return TI;  // Accept variable if already of the right type!
 151   return 0;
 152 }
 153
 154 std::string ListRecTy::getAsString() const {
 155   return "list<" + Ty->getAsString() + ">";
 156 }
 157
 158 Init *ListRecTy::convertValue(ListInit *LI) {
 159   std::vector<Init*> Elements;
 160
 161   // Verify that all of the elements of the list are subclasses of the
 162   // appropriate class!
 163   for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
 164     if (Init *CI = LI->getElement(i)->convertInitializerTo(Ty))
 165       Elements.push_back(CI);
 166     else
 167       return 0;
 168
 169   return new ListInit(Elements);
 170 }
 171
 172 Init *ListRecTy::convertValue(TypedInit *TI) {
 173   // Ensure that TI is compatible with our class.
 174   if (ListRecTy *LRT = dynamic_cast<ListRecTy*>(TI->getType()))
 175     if (LRT->getElementType()->typeIsConvertibleTo(getElementType()))
 176       return TI;
 177   return 0;
 178 }
 179
 180 Init *CodeRecTy::convertValue(TypedInit *TI) {
 181   if (TI->getType()->typeIsConvertibleTo(this))
 182     return TI;
 183   return 0;
 184 }
 185
 186 Init *DagRecTy::convertValue(TypedInit *TI) {
 187   if (TI->getType()->typeIsConvertibleTo(this))
 188     return TI;
 189   return 0;
 190 }
 191
 192 Init *DagRecTy::convertValue(BinOpInit *BO) {
 193   if (BO->getOpcode() == BinOpInit::CONCAT) {
 194     Init *L = BO->getLHS()->convertInitializerTo(this);
 195     Init *R = BO->getRHS()->convertInitializerTo(this);
 196     if (L == 0 || R == 0) return 0;
 197     if (L != BO->getLHS() || R != BO->getRHS())
 198       return new BinOpInit(BinOpInit::CONCAT, L, R);
 199     return BO;
 200   }
 201   return 0;
 202 }
 203
 204 std::string RecordRecTy::getAsString() const {
 205   return Rec->getName();
 206 }
 207
 208 Init *RecordRecTy::convertValue(DefInit *DI) {
 209   // Ensure that DI is a subclass of Rec.
 210   if (!DI->getDef()->isSubClassOf(Rec))
 211     return 0;
 212   return DI;
 213 }
 214
 215 Init *RecordRecTy::convertValue(TypedInit *TI) {
 216   // Ensure that TI is compatible with Rec.
 217   if (RecordRecTy *RRT = dynamic_cast<RecordRecTy*>(TI->getType()))
 218     if (RRT->getRecord()->isSubClassOf(getRecord()) ||
 219         RRT->getRecord() == getRecord())
 220       return TI;
 221   return 0;
 222 }
 223
 224 bool RecordRecTy::baseClassOf(const RecordRecTy *RHS) const {
 225   return Rec == RHS->getRecord() || RHS->getRecord()->isSubClassOf(Rec);
 226 }
 227
 228
 229 //===----------------------------------------------------------------------===//
 230 //    Initializer implementations
 231 //===----------------------------------------------------------------------===//
 232
 233 void Init::dump() const { return print(*cerr.stream()); }
 234
 235 Init *BitsInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 236   BitsInit *BI = new BitsInit(Bits.size());
 237   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 238     if (Bits[i] >= getNumBits()) {
 239       delete BI;
 240       return 0;
 241     }
 242     BI->setBit(i, getBit(Bits[i]));
 243   }
 244   return BI;
 245 }
 246
 247 std::string BitsInit::getAsString() const {
 248   //if (!printInHex(OS)) return;
 249   //if (!printAsVariable(OS)) return;
 250   //if (!printAsUnset(OS)) return;
 251
 252   std::string Result = "{ ";
 253   for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
 254     if (i) Result += ", ";
 255     if (Init *Bit = getBit(e-i-1))
 256       Result += Bit->getAsString();
 257     else
 258       Result += "*";
 259   }
 260   return Result + " }";
 261 }
 262
 263 bool BitsInit::printInHex(std::ostream &OS) const {
 264   // First, attempt to convert the value into an integer value...
 265   int Result = 0;
 266   for (unsigned i = 0, e = getNumBits(); i != e; ++i)
 267     if (BitInit *Bit = dynamic_cast<BitInit*>(getBit(i))) {
 268       Result |= Bit->getValue() << i;
 269     } else {
 270       return true;
 271     }
 272
 273   OS << "0x" << std::hex << Result << std::dec;
 274   return false;
 275 }
 276
 277 bool BitsInit::printAsVariable(std::ostream &OS) const {
 278   // Get the variable that we may be set equal to...
 279   assert(getNumBits() != 0);
 280   VarBitInit *FirstBit = dynamic_cast<VarBitInit*>(getBit(0));
 281   if (FirstBit == 0) return true;
 282   TypedInit *Var = FirstBit->getVariable();
 283
 284   // Check to make sure the types are compatible.
 285   BitsRecTy *Ty = dynamic_cast<BitsRecTy*>(FirstBit->getVariable()->getType());
 286   if (Ty == 0) return true;
 287   if (Ty->getNumBits() != getNumBits()) return true; // Incompatible types!
 288
 289   // Check to make sure all bits are referring to the right bits in the variable
 290   for (unsigned i = 0, e = getNumBits(); i != e; ++i) {
 291     VarBitInit *Bit = dynamic_cast<VarBitInit*>(getBit(i));
 292     if (Bit == 0 || Bit->getVariable() != Var || Bit->getBitNum() != i)
 293       return true;
 294   }
 295
 296   Var->print(OS);
 297   return false;
 298 }
 299
 300 bool BitsInit::printAsUnset(std::ostream &OS) const {
 301   for (unsigned i = 0, e = getNumBits(); i != e; ++i)
 302     if (!dynamic_cast<UnsetInit*>(getBit(i)))
 303       return true;
 304   OS << "?";
 305   return false;
 306 }
 307
 308 // resolveReferences - If there are any field references that refer to fields
 309 // that have been filled in, we can propagate the values now.
 310 //
 311 Init *BitsInit::resolveReferences(Record &R, const RecordVal *RV) {
 312   bool Changed = false;
 313   BitsInit *New = new BitsInit(getNumBits());
 314
 315   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 316     Init *B;
 317     Init *CurBit = getBit(i);
 318
 319     do {
 320       B = CurBit;
 321       CurBit = CurBit->resolveReferences(R, RV);
 322       Changed |= B != CurBit;
 323     } while (B != CurBit);
 324     New->setBit(i, CurBit);
 325   }
 326
 327   if (Changed)
 328     return New;
 329   delete New;
 330   return this;
 331 }
 332
 333 std::string IntInit::getAsString() const {
 334   return itostr(Value);
 335 }
 336
 337 Init *IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 338   BitsInit *BI = new BitsInit(Bits.size());
 339
 340   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 341     if (Bits[i] >= 32) {
 342       delete BI;
 343       return 0;
 344     }
 345     BI->setBit(i, new BitInit(Value & (1 << Bits[i])));
 346   }
 347   return BI;
 348 }
 349
 350 Init *ListInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
 351   std::vector<Init*> Vals;
 352   for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
 353     if (Elements[i] >= getSize())
 354       return 0;
 355     Vals.push_back(getElement(Elements[i]));
 356   }
 357   return new ListInit(Vals);
 358 }
 359
 360 Record *ListInit::getElementAsRecord(unsigned i) const {
 361   assert(i < Values.size() && "List element index out of range!");
 362   DefInit *DI = dynamic_cast<DefInit*>(Values[i]);
 363   if (DI == 0) throw "Expected record in list!";
 364   return DI->getDef();
 365 }
 366
 367 Init *ListInit::resolveReferences(Record &R, const RecordVal *RV) {
 368   std::vector<Init*> Resolved;
 369   Resolved.reserve(getSize());
 370   bool Changed = false;
 371
 372   for (unsigned i = 0, e = getSize(); i != e; ++i) {
 373     Init *E;
 374     Init *CurElt = getElement(i);
 375
 376     do {
 377       E = CurElt;
 378       CurElt = CurElt->resolveReferences(R, RV);
 379       Changed |= E != CurElt;
 380     } while (E != CurElt);
 381     Resolved.push_back(E);
 382   }
 383
 384   if (Changed)
 385     return new ListInit(Resolved);
 386   return this;
 387 }
 388
 389 std::string ListInit::getAsString() const {
 390   std::string Result = "[";
 391   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
 392     if (i) Result += ", ";
 393     Result += Values[i]->getAsString();
 394   }
 395   return Result + "]";
 396 }
 397
 398 Init *BinOpInit::Fold() {
 399   switch (getOpcode()) {
 400   default: assert(0 && "Unknown binop");
 401   case CONCAT: {
 402     DagInit *LHSs = dynamic_cast<DagInit*>(LHS);
 403     DagInit *RHSs = dynamic_cast<DagInit*>(RHS);
 404     if (LHSs && RHSs) {
 405       DefInit *LOp = dynamic_cast<DefInit*>(LHSs->getOperator());
 406       DefInit *ROp = dynamic_cast<DefInit*>(RHSs->getOperator());
 407       if (LOp->getDef() != ROp->getDef()) {
 408         bool LIsOps =
 409           LOp->getDef()->getName() == "outs" ||
 410           LOp->getDef()->getName() != "ins" ||
 411           LOp->getDef()->getName() != "defs";
 412         bool RIsOps =
 413           ROp->getDef()->getName() == "outs" ||
 414           ROp->getDef()->getName() != "ins" ||
 415           ROp->getDef()->getName() != "defs";
 416         if (!LIsOps || !RIsOps)
 417           throw "Concated Dag operators do not match!";
 418       }
 419       std::vector<Init*> Args;
 420       std::vector<std::string> ArgNames;
 421       for (unsigned i = 0, e = LHSs->getNumArgs(); i != e; ++i) {
 422         Args.push_back(LHSs->getArg(i));
 423         ArgNames.push_back(LHSs->getArgName(i));
 424       }
 425       for (unsigned i = 0, e = RHSs->getNumArgs(); i != e; ++i) {
 426         Args.push_back(RHSs->getArg(i));
 427         ArgNames.push_back(RHSs->getArgName(i));
 428       }
 429       return new DagInit(LHSs->getOperator(), Args, ArgNames);
 430     }
 431     break;
 432   }
 433   case STRCONCAT: {
 434     StringInit *LHSs = dynamic_cast<StringInit*>(LHS);
 435     StringInit *RHSs = dynamic_cast<StringInit*>(RHS);
 436     if (LHSs && RHSs)
 437       return new StringInit(LHSs->getValue() + RHSs->getValue());
 438     break;
 439   }
 440   case SHL:
 441   case SRA:
 442   case SRL: {
 443     IntInit *LHSi = dynamic_cast<IntInit*>(LHS);
 444     IntInit *RHSi = dynamic_cast<IntInit*>(RHS);
 445     if (LHSi && RHSi) {
 446       int LHSv = LHSi->getValue(), RHSv = RHSi->getValue();
 447       int Result;
 448       switch (getOpcode()) {
 449       default: assert(0 && "Bad opcode!");
 450       case SHL: Result = LHSv << RHSv; break;
 451       case SRA: Result = LHSv >> RHSv; break;
 452       case SRL: Result = (unsigned)LHSv >> (unsigned)RHSv; break;
 453       }
 454       return new IntInit(Result);
 455     }
 456     break;
 457   }
 458   }
 459   return this;
 460 }
 461
 462 Init *BinOpInit::resolveReferences(Record &R, const RecordVal *RV) {
 463   Init *lhs = LHS->resolveReferences(R, RV);
 464   Init *rhs = RHS->resolveReferences(R, RV);
 465
 466   if (LHS != lhs || RHS != rhs)
 467     return (new BinOpInit(getOpcode(), lhs, rhs))->Fold();
 468   return Fold();
 469 }
 470
 471 std::string BinOpInit::getAsString() const {
 472   std::string Result;
 473   switch (Opc) {
 474   case CONCAT: Result = "!con"; break;
 475   case SHL: Result = "!shl"; break;
 476   case SRA: Result = "!sra"; break;
 477   case SRL: Result = "!srl"; break;
 478   case STRCONCAT: Result = "!strconcat"; break;
 479   }
 480   return Result + "(" + LHS->getAsString() + ", " + RHS->getAsString() + ")";
 481 }
 482
 483 Init *TypedInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 484   BitsRecTy *T = dynamic_cast<BitsRecTy*>(getType());
 485   if (T == 0) return 0;  // Cannot subscript a non-bits variable...
 486   unsigned NumBits = T->getNumBits();
 487
 488   BitsInit *BI = new BitsInit(Bits.size());
 489   for (unsigned i = 0, e = Bits.size(); i != e; ++i) {
 490     if (Bits[i] >= NumBits) {
 491       delete BI;
 492       return 0;
 493     }
 494     BI->setBit(i, new VarBitInit(this, Bits[i]));
 495   }
 496   return BI;
 497 }
 498
 499 Init *TypedInit::convertInitListSlice(const std::vector<unsigned> &Elements) {
 500   ListRecTy *T = dynamic_cast<ListRecTy*>(getType());
 501   if (T == 0) return 0;  // Cannot subscript a non-list variable...
 502
 503   if (Elements.size() == 1)
 504     return new VarListElementInit(this, Elements[0]);
 505
 506   std::vector<Init*> ListInits;
 507   ListInits.reserve(Elements.size());
 508   for (unsigned i = 0, e = Elements.size(); i != e; ++i)
 509     ListInits.push_back(new VarListElementInit(this, Elements[i]));
 510   return new ListInit(ListInits);
 511 }
 512
 513
 514 Init *VarInit::resolveBitReference(Record &R, const RecordVal *IRV,
 515                                    unsigned Bit) {
 516   if (R.isTemplateArg(getName())) return 0;
 517   if (IRV && IRV->getName() != getName()) return 0;
 518
 519   RecordVal *RV = R.getValue(getName());
 520   assert(RV && "Reference to a non-existant variable?");
 521   assert(dynamic_cast<BitsInit*>(RV->getValue()));
 522   BitsInit *BI = (BitsInit*)RV->getValue();
 523
 524   assert(Bit < BI->getNumBits() && "Bit reference out of range!");
 525   Init *B = BI->getBit(Bit);
 526
 527   if (!dynamic_cast<UnsetInit*>(B))  // If the bit is not set...
 528     return B;                        // Replace the VarBitInit with it.
 529   return 0;
 530 }
 531
 532 Init *VarInit::resolveListElementReference(Record &R, const RecordVal *IRV,
 533                                            unsigned Elt) {
 534   if (R.isTemplateArg(getName())) return 0;
 535   if (IRV && IRV->getName() != getName()) return 0;
 536
 537   RecordVal *RV = R.getValue(getName());
 538   assert(RV && "Reference to a non-existant variable?");
 539   ListInit *LI = dynamic_cast<ListInit*>(RV->getValue());
 540   assert(LI && "Invalid list element!");
 541
 542   if (Elt >= LI->getSize())
 543     return 0;  // Out of range reference.
 544   Init *E = LI->getElement(Elt);
 545   if (!dynamic_cast<UnsetInit*>(E))  // If the element is set
 546     return E;                        // Replace the VarListElementInit with it.
 547   return 0;
 548 }
 549
 550
 551 RecTy *VarInit::getFieldType(const std::string &FieldName) const {
 552   if (RecordRecTy *RTy = dynamic_cast<RecordRecTy*>(getType()))
 553     if (const RecordVal *RV = RTy->getRecord()->getValue(FieldName))
 554       return RV->getType();
 555   return 0;
 556 }
 557
 558 Init *VarInit::getFieldInit(Record &R, const std::string &FieldName) const {
 559   if (dynamic_cast<RecordRecTy*>(getType()))
 560     if (const RecordVal *RV = R.getValue(VarName)) {
 561       Init *TheInit = RV->getValue();
 562       assert(TheInit != this && "Infinite loop detected!");
 563       if (Init *I = TheInit->getFieldInit(R, FieldName))
 564         return I;
 565       else
 566         return 0;
 567     }
 568   return 0;
 569 }
 570
 571 /// resolveReferences - This method is used by classes that refer to other
 572 /// variables which may not be defined at the time they expression is formed.
 573 /// If a value is set for the variable later, this method will be called on
 574 /// users of the value to allow the value to propagate out.
 575 ///
 576 Init *VarInit::resolveReferences(Record &R, const RecordVal *RV) {
 577   if (RecordVal *Val = R.getValue(VarName))
 578     if (RV == Val || (RV == 0 && !dynamic_cast<UnsetInit*>(Val->getValue())))
 579       return Val->getValue();
 580   return this;
 581 }
 582
 583 std::string VarBitInit::getAsString() const {
 584    return TI->getAsString() + "{" + utostr(Bit) + "}";
 585 }
 586
 587 Init *VarBitInit::resolveReferences(Record &R, const RecordVal *RV) {
 588   if (Init *I = getVariable()->resolveBitReference(R, RV, getBitNum()))
 589     return I;
 590   return this;
 591 }
 592
 593 std::string VarListElementInit::getAsString() const {
 594   return TI->getAsString() + "[" + utostr(Element) + "]";
 595 }
 596
 597 Init *VarListElementInit::resolveReferences(Record &R, const RecordVal *RV) {
 598   if (Init *I = getVariable()->resolveListElementReference(R, RV,
 599                                                            getElementNum()))
 600     return I;
 601   return this;
 602 }
 603
 604 Init *VarListElementInit::resolveBitReference(Record &R, const RecordVal *RV,
 605                                               unsigned Bit) {
 606   // FIXME: This should be implemented, to support references like:
 607   // bit B = AA[0]{1};
 608   return 0;
 609 }
 610
 611 Init *VarListElementInit::
 612 resolveListElementReference(Record &R, const RecordVal *RV, unsigned Elt) {
 613   // FIXME: This should be implemented, to support references like:
 614   // int B = AA[0][1];
 615   return 0;
 616 }
 617
 618 RecTy *DefInit::getFieldType(const std::string &FieldName) const {
 619   if (const RecordVal *RV = Def->getValue(FieldName))
 620     return RV->getType();
 621   return 0;
 622 }
 623
 624 Init *DefInit::getFieldInit(Record &R, const std::string &FieldName) const {
 625   return Def->getValue(FieldName)->getValue();
 626 }
 627
 628
 629 std::string DefInit::getAsString() const {
 630   return Def->getName();
 631 }
 632
 633 Init *FieldInit::resolveBitReference(Record &R, const RecordVal *RV,
 634                                      unsigned Bit) {
 635   if (Init *BitsVal = Rec->getFieldInit(R, FieldName))
 636     if (BitsInit *BI = dynamic_cast<BitsInit*>(BitsVal)) {
 637       assert(Bit < BI->getNumBits() && "Bit reference out of range!");
 638       Init *B = BI->getBit(Bit);
 639
 640       if (dynamic_cast<BitInit*>(B))  // If the bit is set...
 641         return B;                     // Replace the VarBitInit with it.
 642     }
 643   return 0;
 644 }
 645
 646 Init *FieldInit::resolveListElementReference(Record &R, const RecordVal *RV,
 647                                              unsigned Elt) {
 648   if (Init *ListVal = Rec->getFieldInit(R, FieldName))
 649     if (ListInit *LI = dynamic_cast<ListInit*>(ListVal)) {
 650       if (Elt >= LI->getSize()) return 0;
 651       Init *E = LI->getElement(Elt);
 652
 653       if (!dynamic_cast<UnsetInit*>(E))  // If the bit is set...
 654         return E;                  // Replace the VarListElementInit with it.
 655     }
 656   return 0;
 657 }
 658
 659 Init *FieldInit::resolveReferences(Record &R, const RecordVal *RV) {
 660   Init *NewRec = RV ? Rec->resolveReferences(R, RV) : Rec;
 661
 662   Init *BitsVal = NewRec->getFieldInit(R, FieldName);
 663   if (BitsVal) {
 664     Init *BVR = BitsVal->resolveReferences(R, RV);
 665     return BVR->isComplete() ? BVR : this;
 666   }
 667
 668   if (NewRec != Rec) {
 669     dump();
 670     NewRec->dump(); cerr << "\n";
 671     return new FieldInit(NewRec, FieldName);
 672   }
 673   return this;
 674 }
 675
 676 Init *DagInit::resolveReferences(Record &R, const RecordVal *RV) {
 677   std::vector<Init*> NewArgs;
 678   for (unsigned i = 0, e = Args.size(); i != e; ++i)
 679     NewArgs.push_back(Args[i]->resolveReferences(R, RV));
 680
 681   Init *Op = Val->resolveReferences(R, RV);
 682
 683   if (Args != NewArgs || Op != Val)
 684     return new DagInit(Op, NewArgs, ArgNames);
 685
 686   return this;
 687 }
 688
 689
 690 std::string DagInit::getAsString() const {
 691   std::string Result = "(" + Val->getAsString();
 692   if (Args.size()) {
 693     Result += " " + Args[0]->getAsString();
 694     if (!ArgNames[0].empty()) Result += ":$" + ArgNames[0];
 695     for (unsigned i = 1, e = Args.size(); i != e; ++i) {
 696       Result += ", " + Args[i]->getAsString();
 697       if (!ArgNames[i].empty()) Result += ":$" + ArgNames[i];
 698     }
 699   }
 700   return Result + ")";
 701 }
 702
 703
 704 //===----------------------------------------------------------------------===//
 705 //    Other implementations
 706 //===----------------------------------------------------------------------===//
 707
 708 RecordVal::RecordVal(const std::string &N, RecTy *T, unsigned P)
 709   : Name(N), Ty(T), Prefix(P) {
 710   Value = Ty->convertValue(new UnsetInit());
 711   assert(Value && "Cannot create unset value for current type!");
 712 }
 713
 714 void RecordVal::dump() const { cerr << *this; }
 715
 716 void RecordVal::print(std::ostream &OS, bool PrintSem) const {
 717   if (getPrefix()) OS << "field ";
 718   OS << *getType() << " " << getName();
 719
 720   if (getValue())
 721     OS << " = " << *getValue();
 722
 723   if (PrintSem) OS << ";\n";
 724 }
 725
 726 void Record::setName(const std::string &Name) {
 727   if (Records.getDef(getName()) == this) {
 728     Records.removeDef(getName());
 729     this->Name = Name;
 730     Records.addDef(this);
 731   } else {
 732     Records.removeClass(getName());
 733     this->Name = Name;
 734     Records.addClass(this);
 735   }
 736 }
 737
 738 /// resolveReferencesTo - If anything in this record refers to RV, replace the
 739 /// reference to RV with the RHS of RV.  If RV is null, we resolve all possible
 740 /// references.
 741 void Record::resolveReferencesTo(const RecordVal *RV) {
 742   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
 743     if (Init *V = Values[i].getValue())
 744       Values[i].setValue(V->resolveReferences(*this, RV));
 745   }
 746 }
 747
 748
 749 void Record::dump() const { cerr << *this; }
 750
 751 std::ostream &llvm::operator<<(std::ostream &OS, const Record &R) {
 752   OS << R.getName();
 753
 754   const std::vector<std::string> &TArgs = R.getTemplateArgs();
 755   if (!TArgs.empty()) {
 756     OS << "<";
 757     for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
 758       if (i) OS << ", ";
 759       const RecordVal *RV = R.getValue(TArgs[i]);
 760       assert(RV && "Template argument record not found??");
 761       RV->print(OS, false);
 762     }
 763     OS << ">";
 764   }
 765
 766   OS << " {";
 767   const std::vector<Record*> &SC = R.getSuperClasses();
 768   if (!SC.empty()) {
 769     OS << "\t//";
 770     for (unsigned i = 0, e = SC.size(); i != e; ++i)
 771       OS << " " << SC[i]->getName();
 772   }
 773   OS << "\n";
 774
 775   const std::vector<RecordVal> &Vals = R.getValues();
 776   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
 777     if (Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
 778       OS << Vals[i];
 779   for (unsigned i = 0, e = Vals.size(); i != e; ++i)
 780     if (!Vals[i].getPrefix() && !R.isTemplateArg(Vals[i].getName()))
 781       OS << Vals[i];
 782
 783   return OS << "}\n";
 784 }
 785
 786 /// getValueInit - Return the initializer for a value with the specified name,
 787 /// or throw an exception if the field does not exist.
 788 ///
 789 Init *Record::getValueInit(const std::string &FieldName) const {
 790   const RecordVal *R = getValue(FieldName);
 791   if (R == 0 || R->getValue() == 0)
 792     throw "Record `" + getName() + "' does not have a field named `" +
 793       FieldName + "'!\n";
 794   return R->getValue();
 795 }
 796
 797
 798 /// getValueAsString - This method looks up the specified field and returns its
 799 /// value as a string, throwing an exception if the field does not exist or if
 800 /// the value is not a string.
 801 ///
 802 std::string Record::getValueAsString(const std::string &FieldName) const {
 803   const RecordVal *R = getValue(FieldName);
 804   if (R == 0 || R->getValue() == 0)
 805     throw "Record `" + getName() + "' does not have a field named `" +
 806           FieldName + "'!\n";
 807
 808   if (const StringInit *SI = dynamic_cast<const StringInit*>(R->getValue()))
 809     return SI->getValue();
 810   throw "Record `" + getName() + "', field `" + FieldName +
 811         "' does not have a string initializer!";
 812 }
 813
 814 /// getValueAsBitsInit - This method looks up the specified field and returns
 815 /// its value as a BitsInit, throwing an exception if the field does not exist
 816 /// or if the value is not the right type.
 817 ///
 818 BitsInit *Record::getValueAsBitsInit(const std::string &FieldName) const {
 819   const RecordVal *R = getValue(FieldName);
 820   if (R == 0 || R->getValue() == 0)
 821     throw "Record `" + getName() + "' does not have a field named `" +
 822           FieldName + "'!\n";
 823
 824   if (BitsInit *BI = dynamic_cast<BitsInit*>(R->getValue()))
 825     return BI;
 826   throw "Record `" + getName() + "', field `" + FieldName +
 827         "' does not have a BitsInit initializer!";
 828 }
 829
 830 /// getValueAsListInit - This method looks up the specified field and returns
 831 /// its value as a ListInit, throwing an exception if the field does not exist
 832 /// or if the value is not the right type.
 833 ///
 834 ListInit *Record::getValueAsListInit(const std::string &FieldName) const {
 835   const RecordVal *R = getValue(FieldName);
 836   if (R == 0 || R->getValue() == 0)
 837     throw "Record `" + getName() + "' does not have a field named `" +
 838           FieldName + "'!\n";
 839
 840   if (ListInit *LI = dynamic_cast<ListInit*>(R->getValue()))
 841     return LI;
 842   throw "Record `" + getName() + "', field `" + FieldName +
 843         "' does not have a list initializer!";
 844 }
 845
 846 /// getValueAsListOfDefs - This method looks up the specified field and returns
 847 /// its value as a vector of records, throwing an exception if the field does
 848 /// not exist or if the value is not the right type.
 849 ///
 850 std::vector<Record*>
 851 Record::getValueAsListOfDefs(const std::string &FieldName) const {
 852   ListInit *List = getValueAsListInit(FieldName);
 853   std::vector<Record*> Defs;
 854   for (unsigned i = 0; i < List->getSize(); i++) {
 855     if (DefInit *DI = dynamic_cast<DefInit*>(List->getElement(i))) {
 856       Defs.push_back(DI->getDef());
 857     } else {
 858       throw "Record `" + getName() + "', field `" + FieldName +
 859             "' list is not entirely DefInit!";
 860     }
 861   }
 862   return Defs;
 863 }
 864
 865 /// getValueAsInt - This method looks up the specified field and returns its
 866 /// value as an int, throwing an exception if the field does not exist or if
 867 /// the value is not the right type.
 868 ///
 869 int Record::getValueAsInt(const std::string &FieldName) const {
 870   const RecordVal *R = getValue(FieldName);
 871   if (R == 0 || R->getValue() == 0)
 872     throw "Record `" + getName() + "' does not have a field named `" +
 873           FieldName + "'!\n";
 874
 875   if (IntInit *II = dynamic_cast<IntInit*>(R->getValue()))
 876     return II->getValue();
 877   throw "Record `" + getName() + "', field `" + FieldName +
 878         "' does not have an int initializer!";
 879 }
 880
 881 /// getValueAsListOfInts - This method looks up the specified field and returns
 882 /// its value as a vector of integers, throwing an exception if the field does
 883 /// not exist or if the value is not the right type.
 884 ///
 885 std::vector<int>
 886 Record::getValueAsListOfInts(const std::string &FieldName) const {
 887   ListInit *List = getValueAsListInit(FieldName);
 888   std::vector<int> Ints;
 889   for (unsigned i = 0; i < List->getSize(); i++) {
 890     if (IntInit *II = dynamic_cast<IntInit*>(List->getElement(i))) {
 891       Ints.push_back(II->getValue());
 892     } else {
 893       throw "Record `" + getName() + "', field `" + FieldName +
 894             "' does not have a list of ints initializer!";
 895     }
 896   }
 897   return Ints;
 898 }
 899
 900 /// getValueAsDef - This method looks up the specified field and returns its
 901 /// value as a Record, throwing an exception if the field does not exist or if
 902 /// the value is not the right type.
 903 ///
 904 Record *Record::getValueAsDef(const std::string &FieldName) const {
 905   const RecordVal *R = getValue(FieldName);
 906   if (R == 0 || R->getValue() == 0)
 907     throw "Record `" + getName() + "' does not have a field named `" +
 908       FieldName + "'!\n";
 909
 910   if (DefInit *DI = dynamic_cast<DefInit*>(R->getValue()))
 911     return DI->getDef();
 912   throw "Record `" + getName() + "', field `" + FieldName +
 913         "' does not have a def initializer!";
 914 }
 915
 916 /// getValueAsBit - This method looks up the specified field and returns its
 917 /// value as a bit, throwing an exception if the field does not exist or if
 918 /// the value is not the right type.
 919 ///
 920 bool Record::getValueAsBit(const std::string &FieldName) const {
 921   const RecordVal *R = getValue(FieldName);
 922   if (R == 0 || R->getValue() == 0)
 923     throw "Record `" + getName() + "' does not have a field named `" +
 924       FieldName + "'!\n";
 925
 926   if (BitInit *BI = dynamic_cast<BitInit*>(R->getValue()))
 927     return BI->getValue();
 928   throw "Record `" + getName() + "', field `" + FieldName +
 929         "' does not have a bit initializer!";
 930 }
 931
 932 /// getValueAsDag - This method looks up the specified field and returns its
 933 /// value as an Dag, throwing an exception if the field does not exist or if
 934 /// the value is not the right type.
 935 ///
 936 DagInit *Record::getValueAsDag(const std::string &FieldName) const {
 937   const RecordVal *R = getValue(FieldName);
 938   if (R == 0 || R->getValue() == 0)
 939     throw "Record `" + getName() + "' does not have a field named `" +
 940       FieldName + "'!\n";
 941
 942   if (DagInit *DI = dynamic_cast<DagInit*>(R->getValue()))
 943     return DI;
 944   throw "Record `" + getName() + "', field `" + FieldName +
 945         "' does not have a dag initializer!";
 946 }
 947
 948 std::string Record::getValueAsCode(const std::string &FieldName) const {
 949   const RecordVal *R = getValue(FieldName);
 950   if (R == 0 || R->getValue() == 0)
 951     throw "Record `" + getName() + "' does not have a field named `" +
 952       FieldName + "'!\n";
 953
 954   if (const CodeInit *CI = dynamic_cast<const CodeInit*>(R->getValue()))
 955     return CI->getValue();
 956   throw "Record `" + getName() + "', field `" + FieldName +
 957     "' does not have a code initializer!";
 958 }
 959
 960
 961 void RecordKeeper::dump() const { cerr << *this; }
 962
 963 std::ostream &llvm::operator<<(std::ostream &OS, const RecordKeeper &RK) {
 964   OS << "------------- Classes -----------------\n";
 965   const std::map<std::string, Record*> &Classes = RK.getClasses();
 966   for (std::map<std::string, Record*>::const_iterator I = Classes.begin(),
 967          E = Classes.end(); I != E; ++I)
 968     OS << "class " << *I->second;
 969
 970   OS << "------------- Defs -----------------\n";
 971   const std::map<std::string, Record*> &Defs = RK.getDefs();
 972   for (std::map<std::string, Record*>::const_iterator I = Defs.begin(),
 973          E = Defs.end(); I != E; ++I)
 974     OS << "def " << *I->second;
 975   return OS;
 976 }
 977
 978
 979 /// getAllDerivedDefinitions - This method returns all concrete definitions
 980 /// that derive from the specified class name.  If a class with the specified
 981 /// name does not exist, an error is printed and true is returned.
 982 std::vector<Record*>
 983 RecordKeeper::getAllDerivedDefinitions(const std::string &ClassName) const {
 984   Record *Class = Records.getClass(ClassName);
 985   if (!Class)
 986     throw "ERROR: Couldn't find the `" + ClassName + "' class!\n";
 987
 988   std::vector<Record*> Defs;
 989   for (std::map<std::string, Record*>::const_iterator I = getDefs().begin(),
 990          E = getDefs().end(); I != E; ++I)
 991     if (I->second->isSubClassOf(Class))
 992       Defs.push_back(I->second);
 993
 994   return Defs;
 995 }
 996