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