utils/TableGen/Record.h

   1 //===- Record.h - Classes to represent Table Records ------------*- C++ -*-===//
   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 // This file defines the main TableGen data structures, including the TableGen
  11 // types, values, and high-level data structures.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef RECORD_H
  16 #define RECORD_H
  17
  18 #include "TGSourceMgr.h"
  19 #include "llvm/Support/DataTypes.h"
  20 #include <map>
  21 #include <ostream>
  22
  23 namespace llvm {
  24
  25 // RecTy subclasses.
  26 class BitRecTy;
  27 class BitsRecTy;
  28 class IntRecTy;
  29 class StringRecTy;
  30 class ListRecTy;
  31 class CodeRecTy;
  32 class DagRecTy;
  33 class RecordRecTy;
  34
  35 // Init subclasses.
  36 struct Init;
  37 class UnsetInit;
  38 class BitInit;
  39 class BitsInit;
  40 class IntInit;
  41 class StringInit;
  42 class CodeInit;
  43 class ListInit;
  44 class UnOpInit;
  45 class BinOpInit;
  46 class TernOpInit;
  47 class DefInit;
  48 class DagInit;
  49 class TypedInit;
  50 class VarInit;
  51 class FieldInit;
  52 class VarBitInit;
  53 class VarListElementInit;
  54
  55 // Other classes.
  56 class Record;
  57 class RecordVal;
  58 struct MultiClass;
  59
  60 //===----------------------------------------------------------------------===//
  61 //  Type Classes
  62 //===----------------------------------------------------------------------===//
  63
  64 struct RecTy {
  65   virtual ~RecTy() {}
  66
  67   virtual std::string getAsString() const = 0;
  68   void print(std::ostream &OS) const { OS << getAsString(); }
  69   void dump() const;
  70
  71   /// typeIsConvertibleTo - Return true if all values of 'this' type can be
  72   /// converted to the specified type.
  73   virtual bool typeIsConvertibleTo(const RecTy *RHS) const = 0;
  74
  75 public:   // These methods should only be called from subclasses of Init
  76   virtual Init *convertValue( UnsetInit *UI) { return 0; }
  77   virtual Init *convertValue(   BitInit *BI) { return 0; }
  78   virtual Init *convertValue(  BitsInit *BI) { return 0; }
  79   virtual Init *convertValue(   IntInit *II) { return 0; }
  80   virtual Init *convertValue(StringInit *SI) { return 0; }
  81   virtual Init *convertValue(  ListInit *LI) { return 0; }
  82   virtual Init *convertValue( UnOpInit *UI) {
  83     return convertValue((TypedInit*)UI);
  84   }
  85   virtual Init *convertValue( BinOpInit *UI) {
  86     return convertValue((TypedInit*)UI);
  87   }
  88   virtual Init *convertValue( TernOpInit *UI) {
  89     return convertValue((TypedInit*)UI);
  90   }
  91   virtual Init *convertValue(  CodeInit *CI) { return 0; }
  92   virtual Init *convertValue(VarBitInit *VB) { return 0; }
  93   virtual Init *convertValue(   DefInit *DI) { return 0; }
  94   virtual Init *convertValue(   DagInit *DI) { return 0; }
  95   virtual Init *convertValue( TypedInit *TI) { return 0; }
  96   virtual Init *convertValue(   VarInit *VI) {
  97     return convertValue((TypedInit*)VI);
  98   }
  99   virtual Init *convertValue( FieldInit *FI) {
 100     return convertValue((TypedInit*)FI);
 101   }
 102
 103 public:   // These methods should only be called by subclasses of RecTy.
 104   // baseClassOf - These virtual methods should be overloaded to return true iff
 105   // all values of type 'RHS' can be converted to the 'this' type.
 106   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 107   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 108   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 109   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 110   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 111   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 112   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 113   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 114 };
 115
 116 inline std::ostream &operator<<(std::ostream &OS, const RecTy &Ty) {
 117   Ty.print(OS);
 118   return OS;
 119 }
 120
 121
 122 /// BitRecTy - 'bit' - Represent a single bit
 123 ///
 124 class BitRecTy : public RecTy {
 125 public:
 126   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 127   virtual Init *convertValue(   BitInit *BI) { return (Init*)BI; }
 128   virtual Init *convertValue(  BitsInit *BI);
 129   virtual Init *convertValue(   IntInit *II);
 130   virtual Init *convertValue(StringInit *SI) { return 0; }
 131   virtual Init *convertValue(  ListInit *LI) { return 0; }
 132   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 133   virtual Init *convertValue(VarBitInit *VB) { return (Init*)VB; }
 134   virtual Init *convertValue(   DefInit *DI) { return 0; }
 135   virtual Init *convertValue(   DagInit *DI) { return 0; }
 136   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 137   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 138   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 139   virtual Init *convertValue( TypedInit *TI);
 140   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 141   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 142
 143   std::string getAsString() const { return "bit"; }
 144
 145   bool typeIsConvertibleTo(const RecTy *RHS) const {
 146     return RHS->baseClassOf(this);
 147   }
 148   virtual bool baseClassOf(const BitRecTy    *RHS) const { return true; }
 149   virtual bool baseClassOf(const BitsRecTy   *RHS) const;
 150   virtual bool baseClassOf(const IntRecTy    *RHS) const { return true; }
 151   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 152   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 153   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 154   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 155   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 156
 157 };
 158
 159
 160 // BitsRecTy - 'bits<n>' - Represent a fixed number of bits
 161 /// BitsRecTy - 'bits&lt;n&gt;' - Represent a fixed number of bits
 162 ///
 163 class BitsRecTy : public RecTy {
 164   unsigned Size;
 165 public:
 166   explicit BitsRecTy(unsigned Sz) : Size(Sz) {}
 167
 168   unsigned getNumBits() const { return Size; }
 169
 170   virtual Init *convertValue( UnsetInit *UI);
 171   virtual Init *convertValue(   BitInit *UI);
 172   virtual Init *convertValue(  BitsInit *BI);
 173   virtual Init *convertValue(   IntInit *II);
 174   virtual Init *convertValue(StringInit *SI) { return 0; }
 175   virtual Init *convertValue(  ListInit *LI) { return 0; }
 176   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 177   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 178   virtual Init *convertValue(   DefInit *DI) { return 0; }
 179   virtual Init *convertValue(   DagInit *DI) { return 0; }
 180   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 181   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 182   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 183   virtual Init *convertValue( TypedInit *TI);
 184   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 185   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 186
 187   std::string getAsString() const;
 188
 189   bool typeIsConvertibleTo(const RecTy *RHS) const {
 190     return RHS->baseClassOf(this);
 191   }
 192   virtual bool baseClassOf(const BitRecTy    *RHS) const { return Size == 1; }
 193   virtual bool baseClassOf(const BitsRecTy   *RHS) const {
 194     return RHS->Size == Size;
 195   }
 196   virtual bool baseClassOf(const IntRecTy    *RHS) const { return true; }
 197   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 198   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 199   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 200   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 201   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 202
 203 };
 204
 205
 206 /// IntRecTy - 'int' - Represent an integer value of no particular size
 207 ///
 208 class IntRecTy : public RecTy {
 209 public:
 210   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 211   virtual Init *convertValue(   BitInit *BI);
 212   virtual Init *convertValue(  BitsInit *BI);
 213   virtual Init *convertValue(   IntInit *II) { return (Init*)II; }
 214   virtual Init *convertValue(StringInit *SI) { return 0; }
 215   virtual Init *convertValue(  ListInit *LI) { return 0; }
 216   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 217   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 218   virtual Init *convertValue(   DefInit *DI) { return 0; }
 219   virtual Init *convertValue(   DagInit *DI) { return 0; }
 220   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 221   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 222   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 223   virtual Init *convertValue( TypedInit *TI);
 224   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 225   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 226
 227   std::string getAsString() const { return "int"; }
 228
 229   bool typeIsConvertibleTo(const RecTy *RHS) const {
 230     return RHS->baseClassOf(this);
 231   }
 232
 233   virtual bool baseClassOf(const BitRecTy    *RHS) const { return true; }
 234   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return true; }
 235   virtual bool baseClassOf(const IntRecTy    *RHS) const { return true; }
 236   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 237   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 238   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 239   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 240   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 241
 242 };
 243
 244 /// StringRecTy - 'string' - Represent an string value
 245 ///
 246 class StringRecTy : public RecTy {
 247 public:
 248   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 249   virtual Init *convertValue(   BitInit *BI) { return 0; }
 250   virtual Init *convertValue(  BitsInit *BI) { return 0; }
 251   virtual Init *convertValue(   IntInit *II) { return 0; }
 252   virtual Init *convertValue(StringInit *SI) { return (Init*)SI; }
 253   virtual Init *convertValue(  ListInit *LI) { return 0; }
 254   virtual Init *convertValue( UnOpInit *BO);
 255   virtual Init *convertValue( BinOpInit *BO);
 256   virtual Init *convertValue( TernOpInit *BO) { return RecTy::convertValue(BO);}
 257
 258   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 259   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 260   virtual Init *convertValue(   DefInit *DI) { return 0; }
 261   virtual Init *convertValue(   DagInit *DI) { return 0; }
 262   virtual Init *convertValue( TypedInit *TI);
 263   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 264   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 265
 266   std::string getAsString() const { return "string"; }
 267
 268   bool typeIsConvertibleTo(const RecTy *RHS) const {
 269     return RHS->baseClassOf(this);
 270   }
 271
 272   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 273   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 274   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 275   virtual bool baseClassOf(const StringRecTy *RHS) const { return true; }
 276   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 277   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 278   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 279   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 280 };
 281
 282 // ListRecTy - 'list<Ty>' - Represent a list of values, all of which must be of
 283 // the specified type.
 284 /// ListRecTy - 'list&lt;Ty&gt;' - Represent a list of values, all of which must
 285 /// be of the specified type.
 286 ///
 287 class ListRecTy : public RecTy {
 288   RecTy *Ty;
 289 public:
 290   explicit ListRecTy(RecTy *T) : Ty(T) {}
 291
 292   RecTy *getElementType() const { return Ty; }
 293
 294   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 295   virtual Init *convertValue(   BitInit *BI) { return 0; }
 296   virtual Init *convertValue(  BitsInit *BI) { return 0; }
 297   virtual Init *convertValue(   IntInit *II) { return 0; }
 298   virtual Init *convertValue(StringInit *SI) { return 0; }
 299   virtual Init *convertValue(  ListInit *LI);
 300   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 301   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 302   virtual Init *convertValue(   DefInit *DI) { return 0; }
 303   virtual Init *convertValue(   DagInit *DI) { return 0; }
 304   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 305   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 306   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 307   virtual Init *convertValue( TypedInit *TI);
 308   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 309   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 310
 311   std::string getAsString() const;
 312
 313   bool typeIsConvertibleTo(const RecTy *RHS) const {
 314     return RHS->baseClassOf(this);
 315   }
 316
 317   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 318   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 319   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 320   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 321   virtual bool baseClassOf(const ListRecTy   *RHS) const {
 322     return RHS->getElementType()->typeIsConvertibleTo(Ty);
 323   }
 324   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 325   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 326   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 327 };
 328
 329 /// CodeRecTy - 'code' - Represent an code fragment, function or method.
 330 ///
 331 class CodeRecTy : public RecTy {
 332 public:
 333   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 334   virtual Init *convertValue(   BitInit *BI) { return 0; }
 335   virtual Init *convertValue(  BitsInit *BI) { return 0; }
 336   virtual Init *convertValue(   IntInit *II) { return 0; }
 337   virtual Init *convertValue(StringInit *SI) { return 0; }
 338   virtual Init *convertValue(  ListInit *LI) { return 0; }
 339   virtual Init *convertValue(  CodeInit *CI) { return (Init*)CI; }
 340   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 341   virtual Init *convertValue(   DefInit *DI) { return 0; }
 342   virtual Init *convertValue(   DagInit *DI) { return 0; }
 343   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 344   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 345   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 346   virtual Init *convertValue( TypedInit *TI);
 347   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 348   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 349
 350   std::string getAsString() const { return "code"; }
 351
 352   bool typeIsConvertibleTo(const RecTy *RHS) const {
 353     return RHS->baseClassOf(this);
 354   }
 355   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 356   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 357   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 358   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 359   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 360   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return true; }
 361   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 362   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 363 };
 364
 365 /// DagRecTy - 'dag' - Represent a dag fragment
 366 ///
 367 class DagRecTy : public RecTy {
 368 public:
 369   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 370   virtual Init *convertValue(   BitInit *BI) { return 0; }
 371   virtual Init *convertValue(  BitsInit *BI) { return 0; }
 372   virtual Init *convertValue(   IntInit *II) { return 0; }
 373   virtual Init *convertValue(StringInit *SI) { return 0; }
 374   virtual Init *convertValue(  ListInit *LI) { return 0; }
 375   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 376   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 377   virtual Init *convertValue(   DefInit *DI) { return 0; }
 378   virtual Init *convertValue( UnOpInit *BO);
 379   virtual Init *convertValue( BinOpInit *BO);
 380   virtual Init *convertValue( TernOpInit *BO) { return RecTy::convertValue(BO);}
 381   virtual Init *convertValue(   DagInit *CI) { return (Init*)CI; }
 382   virtual Init *convertValue( TypedInit *TI);
 383   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 384   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 385
 386   std::string getAsString() const { return "dag"; }
 387
 388   bool typeIsConvertibleTo(const RecTy *RHS) const {
 389     return RHS->baseClassOf(this);
 390   }
 391
 392   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 393   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 394   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 395   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 396   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 397   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 398   virtual bool baseClassOf(const DagRecTy    *RHS) const { return true; }
 399   virtual bool baseClassOf(const RecordRecTy *RHS) const { return false; }
 400 };
 401
 402
 403 /// RecordRecTy - '[classname]' - Represent an instance of a class, such as:
 404 /// (R32 X = EAX).
 405 ///
 406 class RecordRecTy : public RecTy {
 407   Record *Rec;
 408 public:
 409   explicit RecordRecTy(Record *R) : Rec(R) {}
 410
 411   Record *getRecord() const { return Rec; }
 412
 413   virtual Init *convertValue( UnsetInit *UI) { return (Init*)UI; }
 414   virtual Init *convertValue(   BitInit *BI) { return 0; }
 415   virtual Init *convertValue(  BitsInit *BI) { return 0; }
 416   virtual Init *convertValue(   IntInit *II) { return 0; }
 417   virtual Init *convertValue(StringInit *SI) { return 0; }
 418   virtual Init *convertValue(  ListInit *LI) { return 0; }
 419   virtual Init *convertValue(  CodeInit *CI) { return 0; }
 420   virtual Init *convertValue(VarBitInit *VB) { return 0; }
 421   virtual Init *convertValue( UnOpInit *UI) { return RecTy::convertValue(UI);}
 422   virtual Init *convertValue( BinOpInit *UI) { return RecTy::convertValue(UI);}
 423   virtual Init *convertValue( TernOpInit *UI) { return RecTy::convertValue(UI);}
 424   virtual Init *convertValue(   DefInit *DI);
 425   virtual Init *convertValue(   DagInit *DI) { return 0; }
 426   virtual Init *convertValue( TypedInit *VI);
 427   virtual Init *convertValue(   VarInit *VI) { return RecTy::convertValue(VI);}
 428   virtual Init *convertValue( FieldInit *FI) { return RecTy::convertValue(FI);}
 429
 430   std::string getAsString() const;
 431
 432   bool typeIsConvertibleTo(const RecTy *RHS) const {
 433     return RHS->baseClassOf(this);
 434   }
 435   virtual bool baseClassOf(const BitRecTy    *RHS) const { return false; }
 436   virtual bool baseClassOf(const BitsRecTy   *RHS) const { return false; }
 437   virtual bool baseClassOf(const IntRecTy    *RHS) const { return false; }
 438   virtual bool baseClassOf(const StringRecTy *RHS) const { return false; }
 439   virtual bool baseClassOf(const ListRecTy   *RHS) const { return false; }
 440   virtual bool baseClassOf(const CodeRecTy   *RHS) const { return false; }
 441   virtual bool baseClassOf(const DagRecTy    *RHS) const { return false; }
 442   virtual bool baseClassOf(const RecordRecTy *RHS) const;
 443 };
 444
 445
 446
 447 //===----------------------------------------------------------------------===//
 448 //  Initializer Classes
 449 //===----------------------------------------------------------------------===//
 450
 451 struct Init {
 452   virtual ~Init() {}
 453
 454   /// isComplete - This virtual method should be overridden by values that may
 455   /// not be completely specified yet.
 456   virtual bool isComplete() const { return true; }
 457
 458   /// print - Print out this value.
 459   void print(std::ostream &OS) const { OS << getAsString(); }
 460
 461   /// getAsString - Convert this value to a string form.
 462   virtual std::string getAsString() const = 0;
 463
 464   /// dump - Debugging method that may be called through a debugger, just
 465   /// invokes print on cerr.
 466   void dump() const;
 467
 468   /// convertInitializerTo - This virtual function is a simple call-back
 469   /// function that should be overridden to call the appropriate
 470   /// RecTy::convertValue method.
 471   ///
 472   virtual Init *convertInitializerTo(RecTy *Ty) = 0;
 473
 474   /// convertInitializerBitRange - This method is used to implement the bitrange
 475   /// selection operator.  Given an initializer, it selects the specified bits
 476   /// out, returning them as a new init of bits type.  If it is not legal to use
 477   /// the bit subscript operator on this initializer, return null.
 478   ///
 479   virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits) {
 480     return 0;
 481   }
 482
 483   /// convertInitListSlice - This method is used to implement the list slice
 484   /// selection operator.  Given an initializer, it selects the specified list
 485   /// elements, returning them as a new init of list type.  If it is not legal
 486   /// to take a slice of this, return null.
 487   ///
 488   virtual Init *convertInitListSlice(const std::vector<unsigned> &Elements) {
 489     return 0;
 490   }
 491
 492   /// getFieldType - This method is used to implement the FieldInit class.
 493   /// Implementors of this method should return the type of the named field if
 494   /// they are of record type.
 495   ///
 496   virtual RecTy *getFieldType(const std::string &FieldName) const { return 0; }
 497
 498   /// getFieldInit - This method complements getFieldType to return the
 499   /// initializer for the specified field.  If getFieldType returns non-null
 500   /// this method should return non-null, otherwise it returns null.
 501   ///
 502   virtual Init *getFieldInit(Record &R, const std::string &FieldName) const {
 503     return 0;
 504   }
 505
 506   /// resolveReferences - This method is used by classes that refer to other
 507   /// variables which may not be defined at the time they expression is formed.
 508   /// If a value is set for the variable later, this method will be called on
 509   /// users of the value to allow the value to propagate out.
 510   ///
 511   virtual Init *resolveReferences(Record &R, const RecordVal *RV) {
 512     return this;
 513   }
 514 };
 515
 516 inline std::ostream &operator<<(std::ostream &OS, const Init &I) {
 517   I.print(OS); return OS;
 518 }
 519
 520 /// TypedInit - This is the common super-class of types that have a specific,
 521 /// explicit, type.
 522 ///
 523 class TypedInit : public Init {
 524   RecTy *Ty;
 525 public:
 526   explicit TypedInit(RecTy *T) : Ty(T) {}
 527
 528   RecTy *getType() const { return Ty; }
 529
 530   virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
 531   virtual Init *convertInitListSlice(const std::vector<unsigned> &Elements);
 532
 533   /// resolveBitReference - This method is used to implement
 534   /// VarBitInit::resolveReferences.  If the bit is able to be resolved, we
 535   /// simply return the resolved value, otherwise we return null.
 536   ///
 537   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
 538                                     unsigned Bit) = 0;
 539
 540   /// resolveListElementReference - This method is used to implement
 541   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 542   /// now, we return the resolved value, otherwise we return null.
 543   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 544                                             unsigned Elt) = 0;
 545 };
 546
 547
 548 /// UnsetInit - ? - Represents an uninitialized value
 549 ///
 550 class UnsetInit : public Init {
 551 public:
 552   virtual Init *convertInitializerTo(RecTy *Ty) {
 553     return Ty->convertValue(this);
 554   }
 555
 556   virtual bool isComplete() const { return false; }
 557   virtual std::string getAsString() const { return "?"; }
 558 };
 559
 560
 561 /// BitInit - true/false - Represent a concrete initializer for a bit.
 562 ///
 563 class BitInit : public Init {
 564   bool Value;
 565 public:
 566   explicit BitInit(bool V) : Value(V) {}
 567
 568   bool getValue() const { return Value; }
 569
 570   virtual Init *convertInitializerTo(RecTy *Ty) {
 571     return Ty->convertValue(this);
 572   }
 573
 574   virtual std::string getAsString() const { return Value ? "1" : "0"; }
 575 };
 576
 577 /// BitsInit - { a, b, c } - Represents an initializer for a BitsRecTy value.
 578 /// It contains a vector of bits, whose size is determined by the type.
 579 ///
 580 class BitsInit : public Init {
 581   std::vector<Init*> Bits;
 582 public:
 583   explicit BitsInit(unsigned Size) : Bits(Size) {}
 584
 585   unsigned getNumBits() const { return Bits.size(); }
 586
 587   Init *getBit(unsigned Bit) const {
 588     assert(Bit < Bits.size() && "Bit index out of range!");
 589     return Bits[Bit];
 590   }
 591   void setBit(unsigned Bit, Init *V) {
 592     assert(Bit < Bits.size() && "Bit index out of range!");
 593     assert(Bits[Bit] == 0 && "Bit already set!");
 594     Bits[Bit] = V;
 595   }
 596
 597   virtual Init *convertInitializerTo(RecTy *Ty) {
 598     return Ty->convertValue(this);
 599   }
 600   virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
 601
 602   virtual bool isComplete() const {
 603     for (unsigned i = 0; i != getNumBits(); ++i)
 604       if (!getBit(i)->isComplete()) return false;
 605     return true;
 606   }
 607   virtual std::string getAsString() const;
 608
 609   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 610
 611   // printXX - Print this bitstream with the specified format, returning true if
 612   // it is not possible.
 613   bool printInHex(std::ostream &OS) const;
 614   bool printAsVariable(std::ostream &OS) const;
 615   bool printAsUnset(std::ostream &OS) const;
 616 };
 617
 618
 619 /// IntInit - 7 - Represent an initalization by a literal integer value.
 620 ///
 621 class IntInit : public Init {
 622   int64_t Value;
 623 public:
 624   explicit IntInit(int64_t V) : Value(V) {}
 625
 626   int64_t getValue() const { return Value; }
 627
 628   virtual Init *convertInitializerTo(RecTy *Ty) {
 629     return Ty->convertValue(this);
 630   }
 631   virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
 632
 633   virtual std::string getAsString() const;
 634 };
 635
 636
 637 /// StringInit - "foo" - Represent an initialization by a string value.
 638 ///
 639 class StringInit : public TypedInit {
 640   std::string Value;
 641 public:
 642   explicit StringInit(const std::string &V)
 643     : TypedInit(new StringRecTy), Value(V) {}
 644
 645   const std::string &getValue() const { return Value; }
 646
 647   virtual Init *convertInitializerTo(RecTy *Ty) {
 648     return Ty->convertValue(this);
 649   }
 650
 651   virtual std::string getAsString() const { return "\"" + Value + "\""; }
 652
 653   /// resolveBitReference - This method is used to implement
 654   /// VarBitInit::resolveReferences.  If the bit is able to be resolved, we
 655   /// simply return the resolved value, otherwise we return null.
 656   ///
 657   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
 658                                     unsigned Bit) {
 659     assert(0 && "Illegal bit reference off string");
 660     return 0;
 661   }
 662
 663   /// resolveListElementReference - This method is used to implement
 664   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 665   /// now, we return the resolved value, otherwise we return null.
 666   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 667                                             unsigned Elt) {
 668     assert(0 && "Illegal element reference off string");
 669     return 0;
 670   }
 671 };
 672
 673 /// CodeInit - "[{...}]" - Represent a code fragment.
 674 ///
 675 class CodeInit : public Init {
 676   std::string Value;
 677 public:
 678   explicit CodeInit(const std::string &V) : Value(V) {}
 679
 680   const std::string getValue() const { return Value; }
 681
 682   virtual Init *convertInitializerTo(RecTy *Ty) {
 683     return Ty->convertValue(this);
 684   }
 685
 686   virtual std::string getAsString() const { return "[{" + Value + "}]"; }
 687 };
 688
 689 /// ListInit - [AL, AH, CL] - Represent a list of defs
 690 ///
 691 class ListInit : public Init {
 692   std::vector<Init*> Values;
 693 public:
 694   typedef std::vector<Init*>::iterator       iterator;
 695   typedef std::vector<Init*>::const_iterator const_iterator;
 696
 697   explicit ListInit(std::vector<Init*> &Vs) {
 698     Values.swap(Vs);
 699   }
 700   explicit ListInit(iterator Start, iterator End)
 701     : Values(Start, End) {}
 702
 703   unsigned getSize() const { return Values.size(); }
 704   Init *getElement(unsigned i) const {
 705     assert(i < Values.size() && "List element index out of range!");
 706     return Values[i];
 707   }
 708
 709   Record *getElementAsRecord(unsigned i) const;
 710
 711   Init *convertInitListSlice(const std::vector<unsigned> &Elements);
 712
 713   virtual Init *convertInitializerTo(RecTy *Ty) {
 714     return Ty->convertValue(this);
 715   }
 716
 717   /// resolveReferences - This method is used by classes that refer to other
 718   /// variables which may not be defined at the time they expression is formed.
 719   /// If a value is set for the variable later, this method will be called on
 720   /// users of the value to allow the value to propagate out.
 721   ///
 722   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 723
 724   virtual std::string getAsString() const;
 725
 726   inline iterator       begin()       { return Values.begin(); }
 727   inline const_iterator begin() const { return Values.begin(); }
 728   inline iterator       end  ()       { return Values.end();   }
 729   inline const_iterator end  () const { return Values.end();   }
 730
 731   inline size_t         size () const { return Values.size();  }
 732   inline bool           empty() const { return Values.empty(); }
 733 };
 734
 735
 736 /// OpInit - Base class for operators
 737 ///
 738 class OpInit : public TypedInit {
 739 public:
 740   OpInit(RecTy *Type) : TypedInit(Type) {}
 741
 742   // Clone - Clone this operator, replacing arguments with the new list
 743   virtual OpInit *clone(std::vector<Init *> &Operands) = 0;
 744
 745   virtual int getNumOperands(void) const = 0;
 746   virtual Init *getOperand(int i) = 0;
 747
 748   // Fold - If possible, fold this to a simpler init.  Return this if not
 749   // possible to fold.
 750   virtual Init *Fold(Record *CurRec, MultiClass *CurMultiClass) = 0;
 751
 752   virtual Init *convertInitializerTo(RecTy *Ty) {
 753     return Ty->convertValue(this);
 754   }
 755
 756   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
 757                                     unsigned Bit);
 758   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 759                                             unsigned Elt);
 760 };
 761
 762
 763 /// UnOpInit - !op (X) - Transform an init.
 764 ///
 765 class UnOpInit : public OpInit {
 766 public:
 767   enum UnaryOp { CAST, CAR, CDR, LNULL };
 768 private:
 769   UnaryOp Opc;
 770   Init *LHS;
 771 public:
 772   UnOpInit(UnaryOp opc, Init *lhs, RecTy *Type) :
 773       OpInit(Type), Opc(opc), LHS(lhs) {
 774   }
 775
 776   // Clone - Clone this operator, replacing arguments with the new list
 777   virtual OpInit *clone(std::vector<Init *> &Operands) {
 778     assert(Operands.size() == 1 &&
 779            "Wrong number of operands for unary operation");
 780     return new UnOpInit(getOpcode(), *Operands.begin(), getType());
 781   }
 782
 783   int getNumOperands(void) const { return 1; }
 784   Init *getOperand(int i) {
 785     assert(i == 0 && "Invalid operand id for unary operator");
 786     return getOperand();
 787   }
 788
 789   UnaryOp getOpcode() const { return Opc; }
 790   Init *getOperand() const { return LHS; }
 791
 792   // Fold - If possible, fold this to a simpler init.  Return this if not
 793   // possible to fold.
 794   Init *Fold(Record *CurRec, MultiClass *CurMultiClass);
 795
 796   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 797
 798   virtual std::string getAsString() const;
 799 };
 800
 801 /// BinOpInit - !op (X, Y) - Combine two inits.
 802 ///
 803 class BinOpInit : public OpInit {
 804 public:
 805   enum BinaryOp { SHL, SRA, SRL, STRCONCAT, CONCAT, NAMECONCAT };
 806 private:
 807   BinaryOp Opc;
 808   Init *LHS, *RHS;
 809 public:
 810   BinOpInit(BinaryOp opc, Init *lhs, Init *rhs, RecTy *Type) :
 811       OpInit(Type), Opc(opc), LHS(lhs), RHS(rhs) {
 812   }
 813
 814   // Clone - Clone this operator, replacing arguments with the new list
 815   virtual OpInit *clone(std::vector<Init *> &Operands) {
 816     assert(Operands.size() == 2 &&
 817            "Wrong number of operands for binary operation");
 818     return new BinOpInit(getOpcode(), Operands[0], Operands[1], getType());
 819   }
 820
 821   int getNumOperands(void) const { return 2; }
 822   Init *getOperand(int i) {
 823     assert((i == 0 || i == 1) && "Invalid operand id for binary operator");
 824     if (i == 0) {
 825       return getLHS();
 826     }
 827     else {
 828       return getRHS();
 829     }
 830   }
 831
 832   BinaryOp getOpcode() const { return Opc; }
 833   Init *getLHS() const { return LHS; }
 834   Init *getRHS() const { return RHS; }
 835
 836   // Fold - If possible, fold this to a simpler init.  Return this if not
 837   // possible to fold.
 838   Init *Fold(Record *CurRec, MultiClass *CurMultiClass);
 839
 840   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 841
 842   virtual std::string getAsString() const;
 843 };
 844
 845 /// TernOpInit - !op (X, Y, Z) - Combine two inits.
 846 ///
 847 class TernOpInit : public OpInit {
 848 public:
 849   enum TernaryOp { SUBST, FOREACH, IF };
 850 private:
 851   TernaryOp Opc;
 852   Init *LHS, *MHS, *RHS;
 853 public:
 854   TernOpInit(TernaryOp opc, Init *lhs, Init *mhs, Init *rhs, RecTy *Type) :
 855       OpInit(Type), Opc(opc), LHS(lhs), MHS(mhs), RHS(rhs) {
 856   }
 857
 858   // Clone - Clone this operator, replacing arguments with the new list
 859   virtual OpInit *clone(std::vector<Init *> &Operands) {
 860     assert(Operands.size() == 3 &&
 861            "Wrong number of operands for ternary operation");
 862     return new TernOpInit(getOpcode(), Operands[0], Operands[1], Operands[2],
 863                           getType());
 864   }
 865
 866   int getNumOperands(void) const { return 3; }
 867   Init *getOperand(int i) {
 868     assert((i == 0 || i == 1 || i == 2) &&
 869            "Invalid operand id for ternary operator");
 870     if (i == 0) {
 871       return getLHS();
 872     }
 873     else if (i == 1) {
 874       return getMHS();
 875     }
 876     else {
 877       return getRHS();
 878     }
 879   }
 880
 881   TernaryOp getOpcode() const { return Opc; }
 882   Init *getLHS() const { return LHS; }
 883   Init *getMHS() const { return MHS; }
 884   Init *getRHS() const { return RHS; }
 885
 886   // Fold - If possible, fold this to a simpler init.  Return this if not
 887   // possible to fold.
 888   Init *Fold(Record *CurRec, MultiClass *CurMultiClass);
 889
 890   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 891
 892   virtual std::string getAsString() const;
 893 };
 894
 895
 896 /// VarInit - 'Opcode' - Represent a reference to an entire variable object.
 897 ///
 898 class VarInit : public TypedInit {
 899   std::string VarName;
 900 public:
 901   explicit VarInit(const std::string &VN, RecTy *T)
 902     : TypedInit(T), VarName(VN) {}
 903
 904   virtual Init *convertInitializerTo(RecTy *Ty) {
 905     return Ty->convertValue(this);
 906   }
 907
 908   const std::string &getName() const { return VarName; }
 909
 910   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
 911                                     unsigned Bit);
 912   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 913                                             unsigned Elt);
 914
 915   virtual RecTy *getFieldType(const std::string &FieldName) const;
 916   virtual Init *getFieldInit(Record &R, const std::string &FieldName) const;
 917
 918   /// resolveReferences - This method is used by classes that refer to other
 919   /// variables which may not be defined at the time they expression is formed.
 920   /// If a value is set for the variable later, this method will be called on
 921   /// users of the value to allow the value to propagate out.
 922   ///
 923   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 924
 925   virtual std::string getAsString() const { return VarName; }
 926 };
 927
 928
 929 /// VarBitInit - Opcode{0} - Represent access to one bit of a variable or field.
 930 ///
 931 class VarBitInit : public Init {
 932   TypedInit *TI;
 933   unsigned Bit;
 934 public:
 935   VarBitInit(TypedInit *T, unsigned B) : TI(T), Bit(B) {
 936     assert(T->getType() && dynamic_cast<BitsRecTy*>(T->getType()) &&
 937            ((BitsRecTy*)T->getType())->getNumBits() > B &&
 938            "Illegal VarBitInit expression!");
 939   }
 940
 941   virtual Init *convertInitializerTo(RecTy *Ty) {
 942     return Ty->convertValue(this);
 943   }
 944
 945   TypedInit *getVariable() const { return TI; }
 946   unsigned getBitNum() const { return Bit; }
 947
 948   virtual std::string getAsString() const;
 949   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 950 };
 951
 952 /// VarListElementInit - List[4] - Represent access to one element of a var or
 953 /// field.
 954 class VarListElementInit : public TypedInit {
 955   TypedInit *TI;
 956   unsigned Element;
 957 public:
 958   VarListElementInit(TypedInit *T, unsigned E)
 959     : TypedInit(dynamic_cast<ListRecTy*>(T->getType())->getElementType()),
 960                 TI(T), Element(E) {
 961     assert(T->getType() && dynamic_cast<ListRecTy*>(T->getType()) &&
 962            "Illegal VarBitInit expression!");
 963   }
 964
 965   virtual Init *convertInitializerTo(RecTy *Ty) {
 966     return Ty->convertValue(this);
 967   }
 968
 969   TypedInit *getVariable() const { return TI; }
 970   unsigned getElementNum() const { return Element; }
 971
 972   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
 973                                     unsigned Bit);
 974
 975   /// resolveListElementReference - This method is used to implement
 976   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 977   /// now, we return the resolved value, otherwise we return null.
 978   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 979                                             unsigned Elt);
 980
 981   virtual std::string getAsString() const;
 982   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
 983 };
 984
 985 /// DefInit - AL - Represent a reference to a 'def' in the description
 986 ///
 987 class DefInit : public TypedInit {
 988   Record *Def;
 989 public:
 990   explicit DefInit(Record *D) : TypedInit(new RecordRecTy(D)), Def(D) {}
 991
 992   virtual Init *convertInitializerTo(RecTy *Ty) {
 993     return Ty->convertValue(this);
 994   }
 995
 996   Record *getDef() const { return Def; }
 997
 998   //virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
 999
1000   virtual RecTy *getFieldType(const std::string &FieldName) const;
1001   virtual Init *getFieldInit(Record &R, const std::string &FieldName) const;
1002
1003   virtual std::string getAsString() const;
1004
1005   /// resolveBitReference - This method is used to implement
1006   /// VarBitInit::resolveReferences.  If the bit is able to be resolved, we
1007   /// simply return the resolved value, otherwise we return null.
1008   ///
1009   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
1010                                     unsigned Bit) {
1011     assert(0 && "Illegal bit reference off def");
1012     return 0;
1013   }
1014
1015   /// resolveListElementReference - This method is used to implement
1016   /// VarListElementInit::resolveReferences.  If the list element is resolvable
1017   /// now, we return the resolved value, otherwise we return null.
1018   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
1019                                             unsigned Elt) {
1020     assert(0 && "Illegal element reference off def");
1021     return 0;
1022   }
1023 };
1024
1025
1026 /// FieldInit - X.Y - Represent a reference to a subfield of a variable
1027 ///
1028 class FieldInit : public TypedInit {
1029   Init *Rec;                // Record we are referring to
1030   std::string FieldName;    // Field we are accessing
1031 public:
1032   FieldInit(Init *R, const std::string &FN)
1033     : TypedInit(R->getFieldType(FN)), Rec(R), FieldName(FN) {
1034     assert(getType() && "FieldInit with non-record type!");
1035   }
1036
1037   virtual Init *convertInitializerTo(RecTy *Ty) {
1038     return Ty->convertValue(this);
1039   }
1040
1041   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
1042                                     unsigned Bit);
1043   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
1044                                             unsigned Elt);
1045
1046   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
1047
1048   virtual std::string getAsString() const {
1049     return Rec->getAsString() + "." + FieldName;
1050   }
1051 };
1052
1053 /// DagInit - (v a, b) - Represent a DAG tree value.  DAG inits are required
1054 /// to have at least one value then a (possibly empty) list of arguments.  Each
1055 /// argument can have a name associated with it.
1056 ///
1057 class DagInit : public TypedInit {
1058   Init *Val;
1059   std::string ValName;
1060   std::vector<Init*> Args;
1061   std::vector<std::string> ArgNames;
1062 public:
1063   DagInit(Init *V, std::string VN,
1064           const std::vector<std::pair<Init*, std::string> > &args)
1065     : TypedInit(new DagRecTy), Val(V), ValName(VN) {
1066     Args.reserve(args.size());
1067     ArgNames.reserve(args.size());
1068     for (unsigned i = 0, e = args.size(); i != e; ++i) {
1069       Args.push_back(args[i].first);
1070       ArgNames.push_back(args[i].second);
1071     }
1072   }
1073   DagInit(Init *V, std::string VN, const std::vector<Init*> &args,
1074           const std::vector<std::string> &argNames)
1075   : TypedInit(new DagRecTy), Val(V), ValName(VN), Args(args), ArgNames(argNames) {
1076   }
1077
1078   virtual Init *convertInitializerTo(RecTy *Ty) {
1079     return Ty->convertValue(this);
1080   }
1081
1082   Init *getOperator() const { return Val; }
1083
1084   const std::string &getName() const { return ValName; }
1085
1086   unsigned getNumArgs() const { return Args.size(); }
1087   Init *getArg(unsigned Num) const {
1088     assert(Num < Args.size() && "Arg number out of range!");
1089     return Args[Num];
1090   }
1091   const std::string &getArgName(unsigned Num) const {
1092     assert(Num < ArgNames.size() && "Arg number out of range!");
1093     return ArgNames[Num];
1094   }
1095
1096   void setArg(unsigned Num, Init *I) {
1097     assert(Num < Args.size() && "Arg number out of range!");
1098     Args[Num] = I;
1099   }
1100
1101   virtual Init *resolveReferences(Record &R, const RecordVal *RV);
1102
1103   virtual std::string getAsString() const;
1104
1105   typedef std::vector<Init*>::iterator             arg_iterator;
1106   typedef std::vector<Init*>::const_iterator       const_arg_iterator;
1107   typedef std::vector<std::string>::iterator       name_iterator;
1108   typedef std::vector<std::string>::const_iterator const_name_iterator;
1109
1110   inline arg_iterator        arg_begin()       { return Args.begin(); }
1111   inline const_arg_iterator  arg_begin() const { return Args.begin(); }
1112   inline arg_iterator        arg_end  ()       { return Args.end();   }
1113   inline const_arg_iterator  arg_end  () const { return Args.end();   }
1114
1115   inline size_t              arg_size () const { return Args.size();  }
1116   inline bool                arg_empty() const { return Args.empty(); }
1117
1118   inline name_iterator       name_begin()       { return ArgNames.begin(); }
1119   inline const_name_iterator name_begin() const { return ArgNames.begin(); }
1120   inline name_iterator       name_end  ()       { return ArgNames.end();   }
1121   inline const_name_iterator name_end  () const { return ArgNames.end();   }
1122
1123   inline size_t              name_size () const { return ArgNames.size();  }
1124   inline bool                name_empty() const { return ArgNames.empty(); }
1125
1126   virtual Init *resolveBitReference(Record &R, const RecordVal *RV,
1127                                     unsigned Bit) {
1128     assert(0 && "Illegal bit reference off dag");
1129     return 0;
1130   }
1131
1132   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
1133                                             unsigned Elt) {
1134     assert(0 && "Illegal element reference off dag");
1135     return 0;
1136   }
1137
1138 };
1139
1140 //===----------------------------------------------------------------------===//
1141 //  High-Level Classes
1142 //===----------------------------------------------------------------------===//
1143
1144 class RecordVal {
1145   std::string Name;
1146   RecTy *Ty;
1147   unsigned Prefix;
1148   Init *Value;
1149 public:
1150   RecordVal(const std::string &N, RecTy *T, unsigned P);
1151
1152   const std::string &getName() const { return Name; }
1153
1154   unsigned getPrefix() const { return Prefix; }
1155   RecTy *getType() const { return Ty; }
1156   Init *getValue() const { return Value; }
1157
1158   bool setValue(Init *V) {
1159     if (V) {
1160       Value = V->convertInitializerTo(Ty);
1161       return Value == 0;
1162     }
1163     Value = 0;
1164     return false;
1165   }
1166
1167   void dump() const;
1168   void print(std::ostream &OS, bool PrintSem = true) const;
1169 };
1170
1171 inline std::ostream &operator<<(std::ostream &OS, const RecordVal &RV) {
1172   RV.print(OS << "  ");
1173   return OS;
1174 }
1175
1176 class Record {
1177   std::string Name;
1178   TGLoc Loc;
1179   std::vector<std::string> TemplateArgs;
1180   std::vector<RecordVal> Values;
1181   std::vector<Record*> SuperClasses;
1182 public:
1183
1184   explicit Record(const std::string &N, TGLoc loc) : Name(N), Loc(loc) {}
1185   ~Record() {}
1186
1187   const std::string &getName() const { return Name; }
1188   void setName(const std::string &Name);  // Also updates RecordKeeper.
1189
1190   TGLoc getLoc() const { return Loc; }
1191
1192   const std::vector<std::string> &getTemplateArgs() const {
1193     return TemplateArgs;
1194   }
1195   const std::vector<RecordVal> &getValues() const { return Values; }
1196   const std::vector<Record*>   &getSuperClasses() const { return SuperClasses; }
1197
1198   bool isTemplateArg(const std::string &Name) const {
1199     for (unsigned i = 0, e = TemplateArgs.size(); i != e; ++i)
1200       if (TemplateArgs[i] == Name) return true;
1201     return false;
1202   }
1203
1204   const RecordVal *getValue(const std::string &Name) const {
1205     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1206       if (Values[i].getName() == Name) return &Values[i];
1207     return 0;
1208   }
1209   RecordVal *getValue(const std::string &Name) {
1210     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1211       if (Values[i].getName() == Name) return &Values[i];
1212     return 0;
1213   }
1214
1215   void addTemplateArg(const std::string &Name) {
1216     assert(!isTemplateArg(Name) && "Template arg already defined!");
1217     TemplateArgs.push_back(Name);
1218   }
1219
1220   void addValue(const RecordVal &RV) {
1221     assert(getValue(RV.getName()) == 0 && "Value already added!");
1222     Values.push_back(RV);
1223   }
1224
1225   void removeValue(const std::string &Name) {
1226     assert(getValue(Name) && "Cannot remove an entry that does not exist!");
1227     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1228       if (Values[i].getName() == Name) {
1229         Values.erase(Values.begin()+i);
1230         return;
1231       }
1232     assert(0 && "Name does not exist in record!");
1233   }
1234
1235   bool isSubClassOf(const Record *R) const {
1236     for (unsigned i = 0, e = SuperClasses.size(); i != e; ++i)
1237       if (SuperClasses[i] == R)
1238         return true;
1239     return false;
1240   }
1241
1242   bool isSubClassOf(const std::string &Name) const {
1243     for (unsigned i = 0, e = SuperClasses.size(); i != e; ++i)
1244       if (SuperClasses[i]->getName() == Name)
1245         return true;
1246     return false;
1247   }
1248
1249   void addSuperClass(Record *R) {
1250     assert(!isSubClassOf(R) && "Already subclassing record!");
1251     SuperClasses.push_back(R);
1252   }
1253
1254   /// resolveReferences - If there are any field references that refer to fields
1255   /// that have been filled in, we can propagate the values now.
1256   ///
1257   void resolveReferences() { resolveReferencesTo(0); }
1258
1259   /// resolveReferencesTo - If anything in this record refers to RV, replace the
1260   /// reference to RV with the RHS of RV.  If RV is null, we resolve all
1261   /// possible references.
1262   void resolveReferencesTo(const RecordVal *RV);
1263
1264   void dump() const;
1265
1266   //===--------------------------------------------------------------------===//
1267   // High-level methods useful to tablegen back-ends
1268   //
1269
1270   /// getValueInit - Return the initializer for a value with the specified name,
1271   /// or throw an exception if the field does not exist.
1272   ///
1273   Init *getValueInit(const std::string &FieldName) const;
1274
1275   /// getValueAsString - This method looks up the specified field and returns
1276   /// its value as a string, throwing an exception if the field does not exist
1277   /// or if the value is not a string.
1278   ///
1279   std::string getValueAsString(const std::string &FieldName) const;
1280
1281   /// getValueAsBitsInit - This method looks up the specified field and returns
1282   /// its value as a BitsInit, throwing an exception if the field does not exist
1283   /// or if the value is not the right type.
1284   ///
1285   BitsInit *getValueAsBitsInit(const std::string &FieldName) const;
1286
1287   /// getValueAsListInit - This method looks up the specified field and returns
1288   /// its value as a ListInit, throwing an exception if the field does not exist
1289   /// or if the value is not the right type.
1290   ///
1291   ListInit *getValueAsListInit(const std::string &FieldName) const;
1292
1293   /// getValueAsListOfDefs - This method looks up the specified field and
1294   /// returns its value as a vector of records, throwing an exception if the
1295   /// field does not exist or if the value is not the right type.
1296   ///
1297   std::vector<Record*> getValueAsListOfDefs(const std::string &FieldName) const;
1298
1299   /// getValueAsListOfInts - This method looks up the specified field and returns
1300   /// its value as a vector of integers, throwing an exception if the field does
1301   /// not exist or if the value is not the right type.
1302   ///
1303   std::vector<int64_t> getValueAsListOfInts(const std::string &FieldName) const;
1304
1305   /// getValueAsDef - This method looks up the specified field and returns its
1306   /// value as a Record, throwing an exception if the field does not exist or if
1307   /// the value is not the right type.
1308   ///
1309   Record *getValueAsDef(const std::string &FieldName) const;
1310
1311   /// getValueAsBit - This method looks up the specified field and returns its
1312   /// value as a bit, throwing an exception if the field does not exist or if
1313   /// the value is not the right type.
1314   ///
1315   bool getValueAsBit(const std::string &FieldName) const;
1316
1317   /// getValueAsInt - This method looks up the specified field and returns its
1318   /// value as an int64_t, throwing an exception if the field does not exist or
1319   /// if the value is not the right type.
1320   ///
1321   int64_t getValueAsInt(const std::string &FieldName) const;
1322
1323   /// getValueAsDag - This method looks up the specified field and returns its
1324   /// value as an Dag, throwing an exception if the field does not exist or if
1325   /// the value is not the right type.
1326   ///
1327   DagInit *getValueAsDag(const std::string &FieldName) const;
1328
1329   /// getValueAsCode - This method looks up the specified field and returns
1330   /// its value as the string data in a CodeInit, throwing an exception if the
1331   /// field does not exist or if the value is not a code object.
1332   ///
1333   std::string getValueAsCode(const std::string &FieldName) const;
1334 };
1335
1336 std::ostream &operator<<(std::ostream &OS, const Record &R);
1337
1338 struct MultiClass {
1339   Record Rec;  // Placeholder for template args and Name.
1340   typedef std::vector<Record*> RecordVector;
1341   RecordVector DefPrototypes;
1342
1343   void dump() const;
1344
1345   MultiClass(const std::string &Name, TGLoc Loc) : Rec(Name, Loc) {}
1346 };
1347
1348 class RecordKeeper {
1349   std::map<std::string, Record*> Classes, Defs;
1350 public:
1351   ~RecordKeeper() {
1352     for (std::map<std::string, Record*>::iterator I = Classes.begin(),
1353            E = Classes.end(); I != E; ++I)
1354       delete I->second;
1355     for (std::map<std::string, Record*>::iterator I = Defs.begin(),
1356            E = Defs.end(); I != E; ++I)
1357       delete I->second;
1358   }
1359
1360   const std::map<std::string, Record*> &getClasses() const { return Classes; }
1361   const std::map<std::string, Record*> &getDefs() const { return Defs; }
1362
1363   Record *getClass(const std::string &Name) const {
1364     std::map<std::string, Record*>::const_iterator I = Classes.find(Name);
1365     return I == Classes.end() ? 0 : I->second;
1366   }
1367   Record *getDef(const std::string &Name) const {
1368     std::map<std::string, Record*>::const_iterator I = Defs.find(Name);
1369     return I == Defs.end() ? 0 : I->second;
1370   }
1371   void addClass(Record *R) {
1372     assert(getClass(R->getName()) == 0 && "Class already exists!");
1373     Classes.insert(std::make_pair(R->getName(), R));
1374   }
1375   void addDef(Record *R) {
1376     assert(getDef(R->getName()) == 0 && "Def already exists!");
1377     Defs.insert(std::make_pair(R->getName(), R));
1378   }
1379
1380   /// removeClass - Remove, but do not delete, the specified record.
1381   ///
1382   void removeClass(const std::string &Name) {
1383     assert(Classes.count(Name) && "Class does not exist!");
1384     Classes.erase(Name);
1385   }
1386   /// removeDef - Remove, but do not delete, the specified record.
1387   ///
1388   void removeDef(const std::string &Name) {
1389     assert(Defs.count(Name) && "Def does not exist!");
1390     Defs.erase(Name);
1391   }
1392
1393   //===--------------------------------------------------------------------===//
1394   // High-level helper methods, useful for tablegen backends...
1395
1396   /// getAllDerivedDefinitions - This method returns all concrete definitions
1397   /// that derive from the specified class name.  If a class with the specified
1398   /// name does not exist, an exception is thrown.
1399   std::vector<Record*>
1400   getAllDerivedDefinitions(const std::string &ClassName) const;
1401
1402
1403   void dump() const;
1404 };
1405
1406 /// LessRecord - Sorting predicate to sort record pointers by name.
1407 ///
1408 struct LessRecord {
1409   bool operator()(const Record *Rec1, const Record *Rec2) const {
1410     return Rec1->getName() < Rec2->getName();
1411   }
1412 };
1413
1414 /// LessRecordFieldName - Sorting predicate to sort record pointers by their
1415 /// name field.
1416 ///
1417 struct LessRecordFieldName {
1418   bool operator()(const Record *Rec1, const Record *Rec2) const {
1419     return Rec1->getValueAsString("Name") < Rec2->getValueAsString("Name");
1420   }
1421 };
1422
1423
1424 class TGError {
1425   TGLoc Loc;
1426   std::string Message;
1427 public:
1428   TGError(TGLoc loc, const std::string &message) : Loc(loc), Message(message) {}
1429
1430   TGLoc getLoc() const { return Loc; }
1431   const std::string &getMessage() const { return Message; }
1432 };
1433
1434
1435 std::ostream &operator<<(std::ostream &OS, const RecordKeeper &RK);
1436
1437 extern RecordKeeper Records;
1438
1439 void PrintError(TGLoc ErrorLoc, const std::string &Msg);
1440
1441
1442 } // End llvm namespace
1443
1444 #endif