src/llvm/include/llvm/TableGen/Record.h

   1 //===- llvm/TableGen/Record.h - Classes for 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 LLVM_TABLEGEN_RECORD_H
  16 #define LLVM_TABLEGEN_RECORD_H
  17
  18 #include "llvm/ADT/ArrayRef.h"
  19 #include "llvm/ADT/FoldingSet.h"
  20 #include "llvm/Support/Allocator.h"
  21 #include "llvm/Support/Casting.h"
  22 #include "llvm/Support/DataTypes.h"
  23 #include "llvm/Support/ErrorHandling.h"
  24 #include "llvm/Support/SourceMgr.h"
  25 #include "llvm/Support/raw_ostream.h"
  26 #include <map>
  27
  28 namespace llvm {
  29 class raw_ostream;
  30
  31 // RecTy subclasses.
  32 class BitRecTy;
  33 class BitsRecTy;
  34 class IntRecTy;
  35 class StringRecTy;
  36 class ListRecTy;
  37 class DagRecTy;
  38 class RecordRecTy;
  39
  40 // Init subclasses.
  41 class Init;
  42 class UnsetInit;
  43 class BitInit;
  44 class BitsInit;
  45 class IntInit;
  46 class StringInit;
  47 class ListInit;
  48 class UnOpInit;
  49 class BinOpInit;
  50 class TernOpInit;
  51 class DefInit;
  52 class DagInit;
  53 class TypedInit;
  54 class VarInit;
  55 class FieldInit;
  56 class VarBitInit;
  57 class VarListElementInit;
  58
  59 // Other classes.
  60 class Record;
  61 class RecordVal;
  62 struct MultiClass;
  63 class RecordKeeper;
  64
  65 //===----------------------------------------------------------------------===//
  66 //  Type Classes
  67 //===----------------------------------------------------------------------===//
  68
  69 class RecTy {
  70 public:
  71   /// \brief Subclass discriminator (for dyn_cast<> et al.)
  72   enum RecTyKind {
  73     BitRecTyKind,
  74     BitsRecTyKind,
  75     IntRecTyKind,
  76     StringRecTyKind,
  77     ListRecTyKind,
  78     DagRecTyKind,
  79     RecordRecTyKind
  80   };
  81
  82 private:
  83   RecTyKind Kind;
  84   ListRecTy *ListTy;
  85   virtual void anchor();
  86
  87 public:
  88   RecTyKind getRecTyKind() const { return Kind; }
  89
  90   RecTy(RecTyKind K) : Kind(K), ListTy(nullptr) {}
  91   virtual ~RecTy() {}
  92
  93   virtual std::string getAsString() const = 0;
  94   void print(raw_ostream &OS) const { OS << getAsString(); }
  95   void dump() const;
  96
  97   /// typeIsConvertibleTo - Return true if all values of 'this' type can be
  98   /// converted to the specified type.
  99   virtual bool typeIsConvertibleTo(const RecTy *RHS) const = 0;
 100
 101   /// getListTy - Returns the type representing list<this>.
 102   ListRecTy *getListTy();
 103
 104 public:   // These methods should only be called from subclasses of Init
 105   virtual Init *convertValue( UnsetInit *UI) { return nullptr; }
 106   virtual Init *convertValue(   BitInit *BI) { return nullptr; }
 107   virtual Init *convertValue(  BitsInit *BI) { return nullptr; }
 108   virtual Init *convertValue(   IntInit *II) { return nullptr; }
 109   virtual Init *convertValue(StringInit *SI) { return nullptr; }
 110   virtual Init *convertValue(  ListInit *LI) { return nullptr; }
 111   virtual Init *convertValue( UnOpInit *UI) {
 112     return convertValue((TypedInit*)UI);
 113   }
 114   virtual Init *convertValue( BinOpInit *UI) {
 115     return convertValue((TypedInit*)UI);
 116   }
 117   virtual Init *convertValue( TernOpInit *UI) {
 118     return convertValue((TypedInit*)UI);
 119   }
 120   virtual Init *convertValue(VarBitInit *VB) { return nullptr; }
 121   virtual Init *convertValue(   DefInit *DI) { return nullptr; }
 122   virtual Init *convertValue(   DagInit *DI) { return nullptr; }
 123   virtual Init *convertValue( TypedInit *TI) { return nullptr; }
 124   virtual Init *convertValue(   VarInit *VI) {
 125     return convertValue((TypedInit*)VI);
 126   }
 127   virtual Init *convertValue( FieldInit *FI) {
 128     return convertValue((TypedInit*)FI);
 129   }
 130
 131 public:
 132   virtual bool baseClassOf(const RecTy*) const;
 133 };
 134
 135 inline raw_ostream &operator<<(raw_ostream &OS, const RecTy &Ty) {
 136   Ty.print(OS);
 137   return OS;
 138 }
 139
 140 /// BitRecTy - 'bit' - Represent a single bit
 141 ///
 142 class BitRecTy : public RecTy {
 143   static BitRecTy Shared;
 144   BitRecTy() : RecTy(BitRecTyKind) {}
 145
 146 public:
 147   static bool classof(const RecTy *RT) {
 148     return RT->getRecTyKind() == BitRecTyKind;
 149   }
 150
 151   static BitRecTy *get() { return &Shared; }
 152
 153   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 154   Init *convertValue(   BitInit *BI) override { return (Init*)BI; }
 155   Init *convertValue(  BitsInit *BI) override;
 156   Init *convertValue(   IntInit *II) override;
 157   Init *convertValue(StringInit *SI) override { return nullptr; }
 158   Init *convertValue(  ListInit *LI) override { return nullptr; }
 159   Init *convertValue(VarBitInit *VB) override { return (Init*)VB; }
 160   Init *convertValue(   DefInit *DI) override { return nullptr; }
 161   Init *convertValue(   DagInit *DI) override { return nullptr; }
 162   Init *convertValue( UnOpInit *UI) override { return RecTy::convertValue(UI);}
 163   Init *convertValue( BinOpInit *UI) override { return RecTy::convertValue(UI);}
 164   Init *convertValue( TernOpInit *UI) override {return RecTy::convertValue(UI);}
 165   Init *convertValue( TypedInit *TI) override;
 166   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 167   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 168
 169   std::string getAsString() const override { return "bit"; }
 170
 171   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 172     return RHS->baseClassOf(this);
 173   }
 174   bool baseClassOf(const RecTy*) const override;
 175 };
 176
 177 /// BitsRecTy - 'bits<n>' - Represent a fixed number of bits
 178 ///
 179 class BitsRecTy : public RecTy {
 180   unsigned Size;
 181   explicit BitsRecTy(unsigned Sz) : RecTy(BitsRecTyKind), Size(Sz) {}
 182
 183 public:
 184   static bool classof(const RecTy *RT) {
 185     return RT->getRecTyKind() == BitsRecTyKind;
 186   }
 187
 188   static BitsRecTy *get(unsigned Sz);
 189
 190   unsigned getNumBits() const { return Size; }
 191
 192   Init *convertValue( UnsetInit *UI) override;
 193   Init *convertValue(   BitInit *UI) override;
 194   Init *convertValue(  BitsInit *BI) override;
 195   Init *convertValue(   IntInit *II) override;
 196   Init *convertValue(StringInit *SI) override { return nullptr; }
 197   Init *convertValue(  ListInit *LI) override { return nullptr; }
 198   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 199   Init *convertValue(   DefInit *DI) override { return nullptr; }
 200   Init *convertValue(   DagInit *DI) override { return nullptr; }
 201   Init *convertValue(  UnOpInit *UI) override { return RecTy::convertValue(UI);}
 202   Init *convertValue( BinOpInit *UI) override { return RecTy::convertValue(UI);}
 203   Init *convertValue(TernOpInit *UI) override { return RecTy::convertValue(UI);}
 204   Init *convertValue( TypedInit *TI) override;
 205   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 206   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 207
 208   std::string getAsString() const override;
 209
 210   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 211     return RHS->baseClassOf(this);
 212   }
 213   bool baseClassOf(const RecTy*) const override;
 214 };
 215
 216 /// IntRecTy - 'int' - Represent an integer value of no particular size
 217 ///
 218 class IntRecTy : public RecTy {
 219   static IntRecTy Shared;
 220   IntRecTy() : RecTy(IntRecTyKind) {}
 221
 222 public:
 223   static bool classof(const RecTy *RT) {
 224     return RT->getRecTyKind() == IntRecTyKind;
 225   }
 226
 227   static IntRecTy *get() { return &Shared; }
 228
 229   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 230   Init *convertValue(   BitInit *BI) override;
 231   Init *convertValue(  BitsInit *BI) override;
 232   Init *convertValue(   IntInit *II) override { return (Init*)II; }
 233   Init *convertValue(StringInit *SI) override { return nullptr; }
 234   Init *convertValue(  ListInit *LI) override { return nullptr; }
 235   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 236   Init *convertValue(   DefInit *DI) override { return nullptr; }
 237   Init *convertValue(   DagInit *DI) override { return nullptr; }
 238   Init *convertValue( UnOpInit *UI)  override { return RecTy::convertValue(UI);}
 239   Init *convertValue( BinOpInit *UI) override { return RecTy::convertValue(UI);}
 240   Init *convertValue( TernOpInit *UI) override {return RecTy::convertValue(UI);}
 241   Init *convertValue( TypedInit *TI) override;
 242   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 243   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 244
 245   std::string getAsString() const override { return "int"; }
 246
 247   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 248     return RHS->baseClassOf(this);
 249   }
 250
 251   bool baseClassOf(const RecTy*) const override;
 252 };
 253
 254 /// StringRecTy - 'string' - Represent an string value
 255 ///
 256 class StringRecTy : public RecTy {
 257   static StringRecTy Shared;
 258   StringRecTy() : RecTy(StringRecTyKind) {}
 259
 260 public:
 261   static bool classof(const RecTy *RT) {
 262     return RT->getRecTyKind() == StringRecTyKind;
 263   }
 264
 265   static StringRecTy *get() { return &Shared; }
 266
 267   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 268   Init *convertValue(   BitInit *BI) override { return nullptr; }
 269   Init *convertValue(  BitsInit *BI) override { return nullptr; }
 270   Init *convertValue(   IntInit *II) override { return nullptr; }
 271   Init *convertValue(StringInit *SI) override { return (Init*)SI; }
 272   Init *convertValue(  ListInit *LI) override { return nullptr; }
 273   Init *convertValue( UnOpInit *BO) override;
 274   Init *convertValue( BinOpInit *BO) override;
 275   Init *convertValue( TernOpInit *BO) override {return RecTy::convertValue(BO);}
 276
 277   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 278   Init *convertValue(   DefInit *DI) override { return nullptr; }
 279   Init *convertValue(   DagInit *DI) override { return nullptr; }
 280   Init *convertValue( TypedInit *TI) override;
 281   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 282   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 283
 284   std::string getAsString() const override { return "string"; }
 285
 286   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 287     return RHS->baseClassOf(this);
 288   }
 289 };
 290
 291 /// ListRecTy - 'list<Ty>' - Represent a list of values, all of which must be of
 292 /// the specified type.
 293 ///
 294 class ListRecTy : public RecTy {
 295   RecTy *Ty;
 296   explicit ListRecTy(RecTy *T) : RecTy(ListRecTyKind), Ty(T) {}
 297   friend ListRecTy *RecTy::getListTy();
 298
 299 public:
 300   static bool classof(const RecTy *RT) {
 301     return RT->getRecTyKind() == ListRecTyKind;
 302   }
 303
 304   static ListRecTy *get(RecTy *T) { return T->getListTy(); }
 305   RecTy *getElementType() const { return Ty; }
 306
 307   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 308   Init *convertValue(   BitInit *BI) override { return nullptr; }
 309   Init *convertValue(  BitsInit *BI) override { return nullptr; }
 310   Init *convertValue(   IntInit *II) override { return nullptr; }
 311   Init *convertValue(StringInit *SI) override { return nullptr; }
 312   Init *convertValue(  ListInit *LI) override;
 313   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 314   Init *convertValue(   DefInit *DI) override { return nullptr; }
 315   Init *convertValue(   DagInit *DI) override { return nullptr; }
 316   Init *convertValue(  UnOpInit *UI) override { return RecTy::convertValue(UI);}
 317   Init *convertValue( BinOpInit *UI) override { return RecTy::convertValue(UI);}
 318   Init *convertValue(TernOpInit *UI) override { return RecTy::convertValue(UI);}
 319   Init *convertValue( TypedInit *TI) override;
 320   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 321   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 322
 323   std::string getAsString() const override;
 324
 325   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 326     return RHS->baseClassOf(this);
 327   }
 328
 329   bool baseClassOf(const RecTy*) const override;
 330 };
 331
 332 /// DagRecTy - 'dag' - Represent a dag fragment
 333 ///
 334 class DagRecTy : public RecTy {
 335   static DagRecTy Shared;
 336   DagRecTy() : RecTy(DagRecTyKind) {}
 337
 338 public:
 339   static bool classof(const RecTy *RT) {
 340     return RT->getRecTyKind() == DagRecTyKind;
 341   }
 342
 343   static DagRecTy *get() { return &Shared; }
 344
 345   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 346   Init *convertValue(   BitInit *BI) override { return nullptr; }
 347   Init *convertValue(  BitsInit *BI) override { return nullptr; }
 348   Init *convertValue(   IntInit *II) override { return nullptr; }
 349   Init *convertValue(StringInit *SI) override { return nullptr; }
 350   Init *convertValue(  ListInit *LI) override { return nullptr; }
 351   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 352   Init *convertValue(   DefInit *DI) override { return nullptr; }
 353   Init *convertValue( UnOpInit *BO) override;
 354   Init *convertValue( BinOpInit *BO) override;
 355   Init *convertValue( TernOpInit *BO) override {return RecTy::convertValue(BO);}
 356   Init *convertValue(   DagInit *CI) override { return (Init*)CI; }
 357   Init *convertValue( TypedInit *TI) override;
 358   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 359   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 360
 361   std::string getAsString() const override { return "dag"; }
 362
 363   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 364     return RHS->baseClassOf(this);
 365   }
 366 };
 367
 368 /// RecordRecTy - '[classname]' - Represent an instance of a class, such as:
 369 /// (R32 X = EAX).
 370 ///
 371 class RecordRecTy : public RecTy {
 372   Record *Rec;
 373   explicit RecordRecTy(Record *R) : RecTy(RecordRecTyKind), Rec(R) {}
 374   friend class Record;
 375
 376 public:
 377   static bool classof(const RecTy *RT) {
 378     return RT->getRecTyKind() == RecordRecTyKind;
 379   }
 380
 381   static RecordRecTy *get(Record *R);
 382
 383   Record *getRecord() const { return Rec; }
 384
 385   Init *convertValue( UnsetInit *UI) override { return (Init*)UI; }
 386   Init *convertValue(   BitInit *BI) override { return nullptr; }
 387   Init *convertValue(  BitsInit *BI) override { return nullptr; }
 388   Init *convertValue(   IntInit *II) override { return nullptr; }
 389   Init *convertValue(StringInit *SI) override { return nullptr; }
 390   Init *convertValue(  ListInit *LI) override { return nullptr; }
 391   Init *convertValue(VarBitInit *VB) override { return nullptr; }
 392   Init *convertValue( UnOpInit *UI) override { return RecTy::convertValue(UI);}
 393   Init *convertValue( BinOpInit *UI) override { return RecTy::convertValue(UI);}
 394   Init *convertValue( TernOpInit *UI) override {return RecTy::convertValue(UI);}
 395   Init *convertValue(   DefInit *DI) override;
 396   Init *convertValue(   DagInit *DI) override { return nullptr; }
 397   Init *convertValue( TypedInit *VI) override;
 398   Init *convertValue(   VarInit *VI) override { return RecTy::convertValue(VI);}
 399   Init *convertValue( FieldInit *FI) override { return RecTy::convertValue(FI);}
 400
 401   std::string getAsString() const override;
 402
 403   bool typeIsConvertibleTo(const RecTy *RHS) const override {
 404     return RHS->baseClassOf(this);
 405   }
 406   bool baseClassOf(const RecTy*) const override;
 407 };
 408
 409 /// resolveTypes - Find a common type that T1 and T2 convert to.
 410 /// Return 0 if no such type exists.
 411 ///
 412 RecTy *resolveTypes(RecTy *T1, RecTy *T2);
 413
 414 //===----------------------------------------------------------------------===//
 415 //  Initializer Classes
 416 //===----------------------------------------------------------------------===//
 417
 418 class Init {
 419 protected:
 420   /// \brief Discriminator enum (for isa<>, dyn_cast<>, et al.)
 421   ///
 422   /// This enum is laid out by a preorder traversal of the inheritance
 423   /// hierarchy, and does not contain an entry for abstract classes, as per
 424   /// the recommendation in docs/HowToSetUpLLVMStyleRTTI.rst.
 425   ///
 426   /// We also explicitly include "first" and "last" values for each
 427   /// interior node of the inheritance tree, to make it easier to read the
 428   /// corresponding classof().
 429   ///
 430   /// We could pack these a bit tighter by not having the IK_FirstXXXInit
 431   /// and IK_LastXXXInit be their own values, but that would degrade
 432   /// readability for really no benefit.
 433   enum InitKind {
 434     IK_BitInit,
 435     IK_FirstTypedInit,
 436     IK_BitsInit,
 437     IK_DagInit,
 438     IK_DefInit,
 439     IK_FieldInit,
 440     IK_IntInit,
 441     IK_ListInit,
 442     IK_FirstOpInit,
 443     IK_BinOpInit,
 444     IK_TernOpInit,
 445     IK_UnOpInit,
 446     IK_LastOpInit,
 447     IK_StringInit,
 448     IK_VarInit,
 449     IK_VarListElementInit,
 450     IK_LastTypedInit,
 451     IK_UnsetInit,
 452     IK_VarBitInit
 453   };
 454
 455 private:
 456   const InitKind Kind;
 457   Init(const Init &) LLVM_DELETED_FUNCTION;
 458   Init &operator=(const Init &) LLVM_DELETED_FUNCTION;
 459   virtual void anchor();
 460
 461 public:
 462   InitKind getKind() const { return Kind; }
 463
 464 protected:
 465   explicit Init(InitKind K) : Kind(K) {}
 466
 467 public:
 468   virtual ~Init() {}
 469
 470   /// isComplete - This virtual method should be overridden by values that may
 471   /// not be completely specified yet.
 472   virtual bool isComplete() const { return true; }
 473
 474   /// print - Print out this value.
 475   void print(raw_ostream &OS) const { OS << getAsString(); }
 476
 477   /// getAsString - Convert this value to a string form.
 478   virtual std::string getAsString() const = 0;
 479   /// getAsUnquotedString - Convert this value to a string form,
 480   /// without adding quote markers.  This primaruly affects
 481   /// StringInits where we will not surround the string value with
 482   /// quotes.
 483   virtual std::string getAsUnquotedString() const { return getAsString(); }
 484
 485   /// dump - Debugging method that may be called through a debugger, just
 486   /// invokes print on stderr.
 487   void dump() const;
 488
 489   /// convertInitializerTo - This virtual function is a simple call-back
 490   /// function that should be overridden to call the appropriate
 491   /// RecTy::convertValue method.
 492   ///
 493   virtual Init *convertInitializerTo(RecTy *Ty) const = 0;
 494
 495   /// convertInitializerBitRange - This method is used to implement the bitrange
 496   /// selection operator.  Given an initializer, it selects the specified bits
 497   /// out, returning them as a new init of bits type.  If it is not legal to use
 498   /// the bit subscript operator on this initializer, return null.
 499   ///
 500   virtual Init *
 501   convertInitializerBitRange(const std::vector<unsigned> &Bits) const {
 502     return nullptr;
 503   }
 504
 505   /// convertInitListSlice - This method is used to implement the list slice
 506   /// selection operator.  Given an initializer, it selects the specified list
 507   /// elements, returning them as a new init of list type.  If it is not legal
 508   /// to take a slice of this, return null.
 509   ///
 510   virtual Init *
 511   convertInitListSlice(const std::vector<unsigned> &Elements) const {
 512     return nullptr;
 513   }
 514
 515   /// getFieldType - This method is used to implement the FieldInit class.
 516   /// Implementors of this method should return the type of the named field if
 517   /// they are of record type.
 518   ///
 519   virtual RecTy *getFieldType(const std::string &FieldName) const {
 520     return nullptr;
 521   }
 522
 523   /// getFieldInit - This method complements getFieldType to return the
 524   /// initializer for the specified field.  If getFieldType returns non-null
 525   /// this method should return non-null, otherwise it returns null.
 526   ///
 527   virtual Init *getFieldInit(Record &R, const RecordVal *RV,
 528                              const std::string &FieldName) const {
 529     return nullptr;
 530   }
 531
 532   /// resolveReferences - This method is used by classes that refer to other
 533   /// variables which may not be defined at the time the expression is formed.
 534   /// If a value is set for the variable later, this method will be called on
 535   /// users of the value to allow the value to propagate out.
 536   ///
 537   virtual Init *resolveReferences(Record &R, const RecordVal *RV) const {
 538     return const_cast<Init *>(this);
 539   }
 540
 541   /// getBit - This method is used to return the initializer for the specified
 542   /// bit.
 543   virtual Init *getBit(unsigned Bit) const = 0;
 544
 545   /// getBitVar - This method is used to retrieve the initializer for bit
 546   /// reference. For non-VarBitInit, it simply returns itself.
 547   virtual Init *getBitVar() const { return const_cast<Init*>(this); }
 548
 549   /// getBitNum - This method is used to retrieve the bit number of a bit
 550   /// reference. For non-VarBitInit, it simply returns 0.
 551   virtual unsigned getBitNum() const { return 0; }
 552 };
 553
 554 inline raw_ostream &operator<<(raw_ostream &OS, const Init &I) {
 555   I.print(OS); return OS;
 556 }
 557
 558 /// TypedInit - This is the common super-class of types that have a specific,
 559 /// explicit, type.
 560 ///
 561 class TypedInit : public Init {
 562   RecTy *Ty;
 563
 564   TypedInit(const TypedInit &Other) LLVM_DELETED_FUNCTION;
 565   TypedInit &operator=(const TypedInit &Other) LLVM_DELETED_FUNCTION;
 566
 567 protected:
 568   explicit TypedInit(InitKind K, RecTy *T) : Init(K), Ty(T) {}
 569
 570 public:
 571   static bool classof(const Init *I) {
 572     return I->getKind() >= IK_FirstTypedInit &&
 573            I->getKind() <= IK_LastTypedInit;
 574   }
 575   RecTy *getType() const { return Ty; }
 576
 577   Init *
 578   convertInitializerBitRange(const std::vector<unsigned> &Bits) const override;
 579   Init *
 580   convertInitListSlice(const std::vector<unsigned> &Elements) const override;
 581
 582   /// getFieldType - This method is used to implement the FieldInit class.
 583   /// Implementors of this method should return the type of the named field if
 584   /// they are of record type.
 585   ///
 586   RecTy *getFieldType(const std::string &FieldName) const override;
 587
 588   /// resolveListElementReference - This method is used to implement
 589   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 590   /// now, we return the resolved value, otherwise we return null.
 591   virtual Init *resolveListElementReference(Record &R, const RecordVal *RV,
 592                                             unsigned Elt) const = 0;
 593 };
 594
 595 /// UnsetInit - ? - Represents an uninitialized value
 596 ///
 597 class UnsetInit : public Init {
 598   UnsetInit() : Init(IK_UnsetInit) {}
 599   UnsetInit(const UnsetInit &) LLVM_DELETED_FUNCTION;
 600   UnsetInit &operator=(const UnsetInit &Other) LLVM_DELETED_FUNCTION;
 601   void anchor() override;
 602
 603 public:
 604   static bool classof(const Init *I) {
 605     return I->getKind() == IK_UnsetInit;
 606   }
 607   static UnsetInit *get();
 608
 609   Init *convertInitializerTo(RecTy *Ty) const override {
 610     return Ty->convertValue(const_cast<UnsetInit *>(this));
 611   }
 612
 613   Init *getBit(unsigned Bit) const override {
 614     return const_cast<UnsetInit*>(this);
 615   }
 616
 617   bool isComplete() const override { return false; }
 618   std::string getAsString() const override { return "?"; }
 619 };
 620
 621 /// BitInit - true/false - Represent a concrete initializer for a bit.
 622 ///
 623 class BitInit : public Init {
 624   bool Value;
 625
 626   explicit BitInit(bool V) : Init(IK_BitInit), Value(V) {}
 627   BitInit(const BitInit &Other) LLVM_DELETED_FUNCTION;
 628   BitInit &operator=(BitInit &Other) LLVM_DELETED_FUNCTION;
 629   void anchor() override;
 630
 631 public:
 632   static bool classof(const Init *I) {
 633     return I->getKind() == IK_BitInit;
 634   }
 635   static BitInit *get(bool V);
 636
 637   bool getValue() const { return Value; }
 638
 639   Init *convertInitializerTo(RecTy *Ty) const override {
 640     return Ty->convertValue(const_cast<BitInit *>(this));
 641   }
 642
 643   Init *getBit(unsigned Bit) const override {
 644     assert(Bit < 1 && "Bit index out of range!");
 645     return const_cast<BitInit*>(this);
 646   }
 647
 648   std::string getAsString() const override { return Value ? "1" : "0"; }
 649 };
 650
 651 /// BitsInit - { a, b, c } - Represents an initializer for a BitsRecTy value.
 652 /// It contains a vector of bits, whose size is determined by the type.
 653 ///
 654 class BitsInit : public TypedInit, public FoldingSetNode {
 655   std::vector<Init*> Bits;
 656
 657   BitsInit(ArrayRef<Init *> Range)
 658     : TypedInit(IK_BitsInit, BitsRecTy::get(Range.size())),
 659       Bits(Range.begin(), Range.end()) {}
 660
 661   BitsInit(const BitsInit &Other) LLVM_DELETED_FUNCTION;
 662   BitsInit &operator=(const BitsInit &Other) LLVM_DELETED_FUNCTION;
 663
 664 public:
 665   static bool classof(const Init *I) {
 666     return I->getKind() == IK_BitsInit;
 667   }
 668   static BitsInit *get(ArrayRef<Init *> Range);
 669
 670   void Profile(FoldingSetNodeID &ID) const;
 671
 672   unsigned getNumBits() const { return Bits.size(); }
 673
 674   Init *convertInitializerTo(RecTy *Ty) const override {
 675     return Ty->convertValue(const_cast<BitsInit *>(this));
 676   }
 677   Init *
 678   convertInitializerBitRange(const std::vector<unsigned> &Bits) const override;
 679
 680   bool isComplete() const override {
 681     for (unsigned i = 0; i != getNumBits(); ++i)
 682       if (!getBit(i)->isComplete()) return false;
 683     return true;
 684   }
 685   bool allInComplete() const {
 686     for (unsigned i = 0; i != getNumBits(); ++i)
 687       if (getBit(i)->isComplete()) return false;
 688     return true;
 689   }
 690   std::string getAsString() const override;
 691
 692   /// resolveListElementReference - This method is used to implement
 693   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 694   /// now, we return the resolved value, otherwise we return null.
 695   Init *resolveListElementReference(Record &R, const RecordVal *RV,
 696                                     unsigned Elt) const override {
 697     llvm_unreachable("Illegal element reference off bits<n>");
 698   }
 699
 700   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
 701
 702   Init *getBit(unsigned Bit) const override {
 703     assert(Bit < Bits.size() && "Bit index out of range!");
 704     return Bits[Bit];
 705   }
 706 };
 707
 708 /// IntInit - 7 - Represent an initialization by a literal integer value.
 709 ///
 710 class IntInit : public TypedInit {
 711   int64_t Value;
 712
 713   explicit IntInit(int64_t V)
 714     : TypedInit(IK_IntInit, IntRecTy::get()), Value(V) {}
 715
 716   IntInit(const IntInit &Other) LLVM_DELETED_FUNCTION;
 717   IntInit &operator=(const IntInit &Other) LLVM_DELETED_FUNCTION;
 718
 719 public:
 720   static bool classof(const Init *I) {
 721     return I->getKind() == IK_IntInit;
 722   }
 723   static IntInit *get(int64_t V);
 724
 725   int64_t getValue() const { return Value; }
 726
 727   Init *convertInitializerTo(RecTy *Ty) const override {
 728     return Ty->convertValue(const_cast<IntInit *>(this));
 729   }
 730   Init *
 731   convertInitializerBitRange(const std::vector<unsigned> &Bits) const override;
 732
 733   std::string getAsString() const override;
 734
 735   /// resolveListElementReference - This method is used to implement
 736   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 737   /// now, we return the resolved value, otherwise we return null.
 738   Init *resolveListElementReference(Record &R, const RecordVal *RV,
 739                                     unsigned Elt) const override {
 740     llvm_unreachable("Illegal element reference off int");
 741   }
 742
 743   Init *getBit(unsigned Bit) const override {
 744     return BitInit::get((Value & (1ULL << Bit)) != 0);
 745   }
 746 };
 747
 748 /// StringInit - "foo" - Represent an initialization by a string value.
 749 ///
 750 class StringInit : public TypedInit {
 751   std::string Value;
 752
 753   explicit StringInit(const std::string &V)
 754     : TypedInit(IK_StringInit, StringRecTy::get()), Value(V) {}
 755
 756   StringInit(const StringInit &Other) LLVM_DELETED_FUNCTION;
 757   StringInit &operator=(const StringInit &Other) LLVM_DELETED_FUNCTION;
 758   void anchor() override;
 759
 760 public:
 761   static bool classof(const Init *I) {
 762     return I->getKind() == IK_StringInit;
 763   }
 764   static StringInit *get(StringRef);
 765
 766   const std::string &getValue() const { return Value; }
 767
 768   Init *convertInitializerTo(RecTy *Ty) const override {
 769     return Ty->convertValue(const_cast<StringInit *>(this));
 770   }
 771
 772   std::string getAsString() const override { return "\"" + Value + "\""; }
 773   std::string getAsUnquotedString() const override { return Value; }
 774
 775   /// resolveListElementReference - This method is used to implement
 776   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 777   /// now, we return the resolved value, otherwise we return null.
 778   Init *resolveListElementReference(Record &R, const RecordVal *RV,
 779                                     unsigned Elt) const override {
 780     llvm_unreachable("Illegal element reference off string");
 781   }
 782
 783   Init *getBit(unsigned Bit) const override {
 784     llvm_unreachable("Illegal bit reference off string");
 785   }
 786 };
 787
 788 /// ListInit - [AL, AH, CL] - Represent a list of defs
 789 ///
 790 class ListInit : public TypedInit, public FoldingSetNode {
 791   std::vector<Init*> Values;
 792
 793 public:
 794   typedef std::vector<Init*>::const_iterator const_iterator;
 795
 796 private:
 797   explicit ListInit(ArrayRef<Init *> Range, RecTy *EltTy)
 798     : TypedInit(IK_ListInit, ListRecTy::get(EltTy)),
 799       Values(Range.begin(), Range.end()) {}
 800
 801   ListInit(const ListInit &Other) LLVM_DELETED_FUNCTION;
 802   ListInit &operator=(const ListInit &Other) LLVM_DELETED_FUNCTION;
 803
 804 public:
 805   static bool classof(const Init *I) {
 806     return I->getKind() == IK_ListInit;
 807   }
 808   static ListInit *get(ArrayRef<Init *> Range, RecTy *EltTy);
 809
 810   void Profile(FoldingSetNodeID &ID) const;
 811
 812   unsigned getSize() const { return Values.size(); }
 813   Init *getElement(unsigned i) const {
 814     assert(i < Values.size() && "List element index out of range!");
 815     return Values[i];
 816   }
 817
 818   Record *getElementAsRecord(unsigned i) const;
 819
 820   Init *
 821     convertInitListSlice(const std::vector<unsigned> &Elements) const override;
 822
 823   Init *convertInitializerTo(RecTy *Ty) const override {
 824     return Ty->convertValue(const_cast<ListInit *>(this));
 825   }
 826
 827   /// resolveReferences - This method is used by classes that refer to other
 828   /// variables which may not be defined at the time they expression is formed.
 829   /// If a value is set for the variable later, this method will be called on
 830   /// users of the value to allow the value to propagate out.
 831   ///
 832   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
 833
 834   std::string getAsString() const override;
 835
 836   ArrayRef<Init*> getValues() const { return Values; }
 837
 838   inline const_iterator begin() const { return Values.begin(); }
 839   inline const_iterator end  () const { return Values.end();   }
 840
 841   inline size_t         size () const { return Values.size();  }
 842   inline bool           empty() const { return Values.empty(); }
 843
 844   /// resolveListElementReference - This method is used to implement
 845   /// VarListElementInit::resolveReferences.  If the list element is resolvable
 846   /// now, we return the resolved value, otherwise we return null.
 847   Init *resolveListElementReference(Record &R, const RecordVal *RV,
 848                                     unsigned Elt) const override;
 849
 850   Init *getBit(unsigned Bit) const override {
 851     llvm_unreachable("Illegal bit reference off list");
 852   }
 853 };
 854
 855 /// OpInit - Base class for operators
 856 ///
 857 class OpInit : public TypedInit {
 858   OpInit(const OpInit &Other) LLVM_DELETED_FUNCTION;
 859   OpInit &operator=(OpInit &Other) LLVM_DELETED_FUNCTION;
 860
 861 protected:
 862   explicit OpInit(InitKind K, RecTy *Type) : TypedInit(K, Type) {}
 863
 864 public:
 865   static bool classof(const Init *I) {
 866     return I->getKind() >= IK_FirstOpInit &&
 867            I->getKind() <= IK_LastOpInit;
 868   }
 869   // Clone - Clone this operator, replacing arguments with the new list
 870   virtual OpInit *clone(std::vector<Init *> &Operands) const = 0;
 871
 872   virtual int getNumOperands() const = 0;
 873   virtual Init *getOperand(int i) const = 0;
 874
 875   // Fold - If possible, fold this to a simpler init.  Return this if not
 876   // possible to fold.
 877   virtual Init *Fold(Record *CurRec, MultiClass *CurMultiClass) const = 0;
 878
 879   Init *convertInitializerTo(RecTy *Ty) const override {
 880     return Ty->convertValue(const_cast<OpInit *>(this));
 881   }
 882
 883   Init *resolveListElementReference(Record &R, const RecordVal *RV,
 884                                     unsigned Elt) const override;
 885
 886   Init *getBit(unsigned Bit) const override;
 887 };
 888
 889 /// UnOpInit - !op (X) - Transform an init.
 890 ///
 891 class UnOpInit : public OpInit {
 892 public:
 893   enum UnaryOp { CAST, HEAD, TAIL, EMPTY };
 894
 895 private:
 896   UnaryOp Opc;
 897   Init *LHS;
 898
 899   UnOpInit(UnaryOp opc, Init *lhs, RecTy *Type)
 900     : OpInit(IK_UnOpInit, Type), Opc(opc), LHS(lhs) {}
 901
 902   UnOpInit(const UnOpInit &Other) LLVM_DELETED_FUNCTION;
 903   UnOpInit &operator=(const UnOpInit &Other) LLVM_DELETED_FUNCTION;
 904
 905 public:
 906   static bool classof(const Init *I) {
 907     return I->getKind() == IK_UnOpInit;
 908   }
 909   static UnOpInit *get(UnaryOp opc, Init *lhs, RecTy *Type);
 910
 911   // Clone - Clone this operator, replacing arguments with the new list
 912   OpInit *clone(std::vector<Init *> &Operands) const override {
 913     assert(Operands.size() == 1 &&
 914            "Wrong number of operands for unary operation");
 915     return UnOpInit::get(getOpcode(), *Operands.begin(), getType());
 916   }
 917
 918   int getNumOperands() const override { return 1; }
 919   Init *getOperand(int i) const override {
 920     assert(i == 0 && "Invalid operand id for unary operator");
 921     return getOperand();
 922   }
 923
 924   UnaryOp getOpcode() const { return Opc; }
 925   Init *getOperand() const { return LHS; }
 926
 927   // Fold - If possible, fold this to a simpler init.  Return this if not
 928   // possible to fold.
 929   Init *Fold(Record *CurRec, MultiClass *CurMultiClass) const override;
 930
 931   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
 932
 933   std::string getAsString() const override;
 934 };
 935
 936 /// BinOpInit - !op (X, Y) - Combine two inits.
 937 ///
 938 class BinOpInit : public OpInit {
 939 public:
 940   enum BinaryOp { ADD, AND, SHL, SRA, SRL, LISTCONCAT, STRCONCAT, CONCAT, EQ };
 941
 942 private:
 943   BinaryOp Opc;
 944   Init *LHS, *RHS;
 945
 946   BinOpInit(BinaryOp opc, Init *lhs, Init *rhs, RecTy *Type) :
 947       OpInit(IK_BinOpInit, Type), Opc(opc), LHS(lhs), RHS(rhs) {}
 948
 949   BinOpInit(const BinOpInit &Other) LLVM_DELETED_FUNCTION;
 950   BinOpInit &operator=(const BinOpInit &Other) LLVM_DELETED_FUNCTION;
 951
 952 public:
 953   static bool classof(const Init *I) {
 954     return I->getKind() == IK_BinOpInit;
 955   }
 956   static BinOpInit *get(BinaryOp opc, Init *lhs, Init *rhs,
 957                         RecTy *Type);
 958
 959   // Clone - Clone this operator, replacing arguments with the new list
 960   OpInit *clone(std::vector<Init *> &Operands) const override {
 961     assert(Operands.size() == 2 &&
 962            "Wrong number of operands for binary operation");
 963     return BinOpInit::get(getOpcode(), Operands[0], Operands[1], getType());
 964   }
 965
 966   int getNumOperands() const override { return 2; }
 967   Init *getOperand(int i) const override {
 968     assert((i == 0 || i == 1) && "Invalid operand id for binary operator");
 969     if (i == 0) {
 970       return getLHS();
 971     } else {
 972       return getRHS();
 973     }
 974   }
 975
 976   BinaryOp getOpcode() const { return Opc; }
 977   Init *getLHS() const { return LHS; }
 978   Init *getRHS() const { return RHS; }
 979
 980   // Fold - If possible, fold this to a simpler init.  Return this if not
 981   // possible to fold.
 982   Init *Fold(Record *CurRec, MultiClass *CurMultiClass) const override;
 983
 984   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
 985
 986   std::string getAsString() const override;
 987 };
 988
 989 /// TernOpInit - !op (X, Y, Z) - Combine two inits.
 990 ///
 991 class TernOpInit : public OpInit {
 992 public:
 993   enum TernaryOp { SUBST, FOREACH, IF };
 994
 995 private:
 996   TernaryOp Opc;
 997   Init *LHS, *MHS, *RHS;
 998
 999   TernOpInit(TernaryOp opc, Init *lhs, Init *mhs, Init *rhs,
1000              RecTy *Type) :
1001       OpInit(IK_TernOpInit, Type), Opc(opc), LHS(lhs), MHS(mhs), RHS(rhs) {}
1002
1003   TernOpInit(const TernOpInit &Other) LLVM_DELETED_FUNCTION;
1004   TernOpInit &operator=(const TernOpInit &Other) LLVM_DELETED_FUNCTION;
1005
1006 public:
1007   static bool classof(const Init *I) {
1008     return I->getKind() == IK_TernOpInit;
1009   }
1010   static TernOpInit *get(TernaryOp opc, Init *lhs,
1011                          Init *mhs, Init *rhs,
1012                          RecTy *Type);
1013
1014   // Clone - Clone this operator, replacing arguments with the new list
1015   OpInit *clone(std::vector<Init *> &Operands) const override {
1016     assert(Operands.size() == 3 &&
1017            "Wrong number of operands for ternary operation");
1018     return TernOpInit::get(getOpcode(), Operands[0], Operands[1], Operands[2],
1019                            getType());
1020   }
1021
1022   int getNumOperands() const override { return 3; }
1023   Init *getOperand(int i) const override {
1024     assert((i == 0 || i == 1 || i == 2) &&
1025            "Invalid operand id for ternary operator");
1026     if (i == 0) {
1027       return getLHS();
1028     } else if (i == 1) {
1029       return getMHS();
1030     } else {
1031       return getRHS();
1032     }
1033   }
1034
1035   TernaryOp getOpcode() const { return Opc; }
1036   Init *getLHS() const { return LHS; }
1037   Init *getMHS() const { return MHS; }
1038   Init *getRHS() const { return RHS; }
1039
1040   // Fold - If possible, fold this to a simpler init.  Return this if not
1041   // possible to fold.
1042   Init *Fold(Record *CurRec, MultiClass *CurMultiClass) const override;
1043
1044   bool isComplete() const override { return false; }
1045
1046   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1047
1048   std::string getAsString() const override;
1049 };
1050
1051 /// VarInit - 'Opcode' - Represent a reference to an entire variable object.
1052 ///
1053 class VarInit : public TypedInit {
1054   Init *VarName;
1055
1056   explicit VarInit(const std::string &VN, RecTy *T)
1057       : TypedInit(IK_VarInit, T), VarName(StringInit::get(VN)) {}
1058   explicit VarInit(Init *VN, RecTy *T)
1059       : TypedInit(IK_VarInit, T), VarName(VN) {}
1060
1061   VarInit(const VarInit &Other) LLVM_DELETED_FUNCTION;
1062   VarInit &operator=(const VarInit &Other) LLVM_DELETED_FUNCTION;
1063
1064 public:
1065   static bool classof(const Init *I) {
1066     return I->getKind() == IK_VarInit;
1067   }
1068   static VarInit *get(const std::string &VN, RecTy *T);
1069   static VarInit *get(Init *VN, RecTy *T);
1070
1071   Init *convertInitializerTo(RecTy *Ty) const override {
1072     return Ty->convertValue(const_cast<VarInit *>(this));
1073   }
1074
1075   const std::string &getName() const;
1076   Init *getNameInit() const { return VarName; }
1077   std::string getNameInitAsString() const {
1078     return getNameInit()->getAsUnquotedString();
1079   }
1080
1081   Init *resolveListElementReference(Record &R, const RecordVal *RV,
1082                                     unsigned Elt) const override;
1083
1084   RecTy *getFieldType(const std::string &FieldName) const override;
1085   Init *getFieldInit(Record &R, const RecordVal *RV,
1086                      const std::string &FieldName) const override;
1087
1088   /// resolveReferences - This method is used by classes that refer to other
1089   /// variables which may not be defined at the time they expression is formed.
1090   /// If a value is set for the variable later, this method will be called on
1091   /// users of the value to allow the value to propagate out.
1092   ///
1093   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1094
1095   Init *getBit(unsigned Bit) const override;
1096
1097   std::string getAsString() const override { return getName(); }
1098 };
1099
1100 /// VarBitInit - Opcode{0} - Represent access to one bit of a variable or field.
1101 ///
1102 class VarBitInit : public Init {
1103   TypedInit *TI;
1104   unsigned Bit;
1105
1106   VarBitInit(TypedInit *T, unsigned B) : Init(IK_VarBitInit), TI(T), Bit(B) {
1107     assert(T->getType() &&
1108            (isa<IntRecTy>(T->getType()) ||
1109             (isa<BitsRecTy>(T->getType()) &&
1110              cast<BitsRecTy>(T->getType())->getNumBits() > B)) &&
1111            "Illegal VarBitInit expression!");
1112   }
1113
1114   VarBitInit(const VarBitInit &Other) LLVM_DELETED_FUNCTION;
1115   VarBitInit &operator=(const VarBitInit &Other) LLVM_DELETED_FUNCTION;
1116
1117 public:
1118   static bool classof(const Init *I) {
1119     return I->getKind() == IK_VarBitInit;
1120   }
1121   static VarBitInit *get(TypedInit *T, unsigned B);
1122
1123   Init *convertInitializerTo(RecTy *Ty) const override {
1124     return Ty->convertValue(const_cast<VarBitInit *>(this));
1125   }
1126
1127   Init *getBitVar() const override { return TI; }
1128   unsigned getBitNum() const override { return Bit; }
1129
1130   std::string getAsString() const override;
1131   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1132
1133   Init *getBit(unsigned B) const override {
1134     assert(B < 1 && "Bit index out of range!");
1135     return const_cast<VarBitInit*>(this);
1136   }
1137 };
1138
1139 /// VarListElementInit - List[4] - Represent access to one element of a var or
1140 /// field.
1141 class VarListElementInit : public TypedInit {
1142   TypedInit *TI;
1143   unsigned Element;
1144
1145   VarListElementInit(TypedInit *T, unsigned E)
1146       : TypedInit(IK_VarListElementInit,
1147                   cast<ListRecTy>(T->getType())->getElementType()),
1148         TI(T), Element(E) {
1149     assert(T->getType() && isa<ListRecTy>(T->getType()) &&
1150            "Illegal VarBitInit expression!");
1151   }
1152
1153   VarListElementInit(const VarListElementInit &Other) LLVM_DELETED_FUNCTION;
1154   void operator=(const VarListElementInit &Other) LLVM_DELETED_FUNCTION;
1155
1156 public:
1157   static bool classof(const Init *I) {
1158     return I->getKind() == IK_VarListElementInit;
1159   }
1160   static VarListElementInit *get(TypedInit *T, unsigned E);
1161
1162   Init *convertInitializerTo(RecTy *Ty) const override {
1163     return Ty->convertValue(const_cast<VarListElementInit *>(this));
1164   }
1165
1166   TypedInit *getVariable() const { return TI; }
1167   unsigned getElementNum() const { return Element; }
1168
1169   /// resolveListElementReference - This method is used to implement
1170   /// VarListElementInit::resolveReferences.  If the list element is resolvable
1171   /// now, we return the resolved value, otherwise we return null.
1172   Init *resolveListElementReference(Record &R, const RecordVal *RV,
1173                                     unsigned Elt) const override;
1174
1175   std::string getAsString() const override;
1176   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1177
1178   Init *getBit(unsigned Bit) const override;
1179 };
1180
1181 /// DefInit - AL - Represent a reference to a 'def' in the description
1182 ///
1183 class DefInit : public TypedInit {
1184   Record *Def;
1185
1186   DefInit(Record *D, RecordRecTy *T) : TypedInit(IK_DefInit, T), Def(D) {}
1187   friend class Record;
1188
1189   DefInit(const DefInit &Other) LLVM_DELETED_FUNCTION;
1190   DefInit &operator=(const DefInit &Other) LLVM_DELETED_FUNCTION;
1191
1192 public:
1193   static bool classof(const Init *I) {
1194     return I->getKind() == IK_DefInit;
1195   }
1196   static DefInit *get(Record*);
1197
1198   Init *convertInitializerTo(RecTy *Ty) const override {
1199     return Ty->convertValue(const_cast<DefInit *>(this));
1200   }
1201
1202   Record *getDef() const { return Def; }
1203
1204   //virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
1205
1206   RecTy *getFieldType(const std::string &FieldName) const override;
1207   Init *getFieldInit(Record &R, const RecordVal *RV,
1208                      const std::string &FieldName) const override;
1209
1210   std::string getAsString() const override;
1211
1212   Init *getBit(unsigned Bit) const override {
1213     llvm_unreachable("Illegal bit reference off def");
1214   }
1215
1216   /// resolveListElementReference - This method is used to implement
1217   /// VarListElementInit::resolveReferences.  If the list element is resolvable
1218   /// now, we return the resolved value, otherwise we return null.
1219   Init *resolveListElementReference(Record &R, const RecordVal *RV,
1220                                     unsigned Elt) const override {
1221     llvm_unreachable("Illegal element reference off def");
1222   }
1223 };
1224
1225 /// FieldInit - X.Y - Represent a reference to a subfield of a variable
1226 ///
1227 class FieldInit : public TypedInit {
1228   Init *Rec;                // Record we are referring to
1229   std::string FieldName;    // Field we are accessing
1230
1231   FieldInit(Init *R, const std::string &FN)
1232       : TypedInit(IK_FieldInit, R->getFieldType(FN)), Rec(R), FieldName(FN) {
1233     assert(getType() && "FieldInit with non-record type!");
1234   }
1235
1236   FieldInit(const FieldInit &Other) LLVM_DELETED_FUNCTION;
1237   FieldInit &operator=(const FieldInit &Other) LLVM_DELETED_FUNCTION;
1238
1239 public:
1240   static bool classof(const Init *I) {
1241     return I->getKind() == IK_FieldInit;
1242   }
1243   static FieldInit *get(Init *R, const std::string &FN);
1244   static FieldInit *get(Init *R, const Init *FN);
1245
1246   Init *convertInitializerTo(RecTy *Ty) const override {
1247     return Ty->convertValue(const_cast<FieldInit *>(this));
1248   }
1249
1250   Init *getBit(unsigned Bit) const override;
1251
1252   Init *resolveListElementReference(Record &R, const RecordVal *RV,
1253                                     unsigned Elt) const override;
1254
1255   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1256
1257   std::string getAsString() const override {
1258     return Rec->getAsString() + "." + FieldName;
1259   }
1260 };
1261
1262 /// DagInit - (v a, b) - Represent a DAG tree value.  DAG inits are required
1263 /// to have at least one value then a (possibly empty) list of arguments.  Each
1264 /// argument can have a name associated with it.
1265 ///
1266 class DagInit : public TypedInit, public FoldingSetNode {
1267   Init *Val;
1268   std::string ValName;
1269   std::vector<Init*> Args;
1270   std::vector<std::string> ArgNames;
1271
1272   DagInit(Init *V, const std::string &VN,
1273           ArrayRef<Init *> ArgRange,
1274           ArrayRef<std::string> NameRange)
1275       : TypedInit(IK_DagInit, DagRecTy::get()), Val(V), ValName(VN),
1276           Args(ArgRange.begin(), ArgRange.end()),
1277           ArgNames(NameRange.begin(), NameRange.end()) {}
1278
1279   DagInit(const DagInit &Other) LLVM_DELETED_FUNCTION;
1280   DagInit &operator=(const DagInit &Other) LLVM_DELETED_FUNCTION;
1281
1282 public:
1283   static bool classof(const Init *I) {
1284     return I->getKind() == IK_DagInit;
1285   }
1286   static DagInit *get(Init *V, const std::string &VN,
1287                       ArrayRef<Init *> ArgRange,
1288                       ArrayRef<std::string> NameRange);
1289   static DagInit *get(Init *V, const std::string &VN,
1290                       const std::vector<
1291                         std::pair<Init*, std::string> > &args);
1292
1293   void Profile(FoldingSetNodeID &ID) const;
1294
1295   Init *convertInitializerTo(RecTy *Ty) const override {
1296     return Ty->convertValue(const_cast<DagInit *>(this));
1297   }
1298
1299   Init *getOperator() const { return Val; }
1300
1301   const std::string &getName() const { return ValName; }
1302
1303   unsigned getNumArgs() const { return Args.size(); }
1304   Init *getArg(unsigned Num) const {
1305     assert(Num < Args.size() && "Arg number out of range!");
1306     return Args[Num];
1307   }
1308   const std::string &getArgName(unsigned Num) const {
1309     assert(Num < ArgNames.size() && "Arg number out of range!");
1310     return ArgNames[Num];
1311   }
1312
1313   Init *resolveReferences(Record &R, const RecordVal *RV) const override;
1314
1315   std::string getAsString() const override;
1316
1317   typedef std::vector<Init*>::const_iterator       const_arg_iterator;
1318   typedef std::vector<std::string>::const_iterator const_name_iterator;
1319
1320   inline const_arg_iterator  arg_begin() const { return Args.begin(); }
1321   inline const_arg_iterator  arg_end  () const { return Args.end();   }
1322
1323   inline size_t              arg_size () const { return Args.size();  }
1324   inline bool                arg_empty() const { return Args.empty(); }
1325
1326   inline const_name_iterator name_begin() const { return ArgNames.begin(); }
1327   inline const_name_iterator name_end  () const { return ArgNames.end();   }
1328
1329   inline size_t              name_size () const { return ArgNames.size();  }
1330   inline bool                name_empty() const { return ArgNames.empty(); }
1331
1332   Init *getBit(unsigned Bit) const override {
1333     llvm_unreachable("Illegal bit reference off dag");
1334   }
1335
1336   Init *resolveListElementReference(Record &R, const RecordVal *RV,
1337                                     unsigned Elt) const override {
1338     llvm_unreachable("Illegal element reference off dag");
1339   }
1340 };
1341
1342 //===----------------------------------------------------------------------===//
1343 //  High-Level Classes
1344 //===----------------------------------------------------------------------===//
1345
1346 class RecordVal {
1347   Init *Name;
1348   RecTy *Ty;
1349   unsigned Prefix;
1350   Init *Value;
1351
1352 public:
1353   RecordVal(Init *N, RecTy *T, unsigned P);
1354   RecordVal(const std::string &N, RecTy *T, unsigned P);
1355
1356   const std::string &getName() const;
1357   const Init *getNameInit() const { return Name; }
1358   std::string getNameInitAsString() const {
1359     return getNameInit()->getAsUnquotedString();
1360   }
1361
1362   unsigned getPrefix() const { return Prefix; }
1363   RecTy *getType() const { return Ty; }
1364   Init *getValue() const { return Value; }
1365
1366   bool setValue(Init *V) {
1367     if (V) {
1368       Value = V->convertInitializerTo(Ty);
1369       return Value == nullptr;
1370     }
1371     Value = nullptr;
1372     return false;
1373   }
1374
1375   void dump() const;
1376   void print(raw_ostream &OS, bool PrintSem = true) const;
1377 };
1378
1379 inline raw_ostream &operator<<(raw_ostream &OS, const RecordVal &RV) {
1380   RV.print(OS << "  ");
1381   return OS;
1382 }
1383
1384 class Record {
1385   static unsigned LastID;
1386
1387   // Unique record ID.
1388   unsigned ID;
1389   Init *Name;
1390   // Location where record was instantiated, followed by the location of
1391   // multiclass prototypes used.
1392   SmallVector<SMLoc, 4> Locs;
1393   std::vector<Init *> TemplateArgs;
1394   std::vector<RecordVal> Values;
1395   std::vector<Record *> SuperClasses;
1396   std::vector<SMRange> SuperClassRanges;
1397
1398   // Tracks Record instances. Not owned by Record.
1399   RecordKeeper &TrackedRecords;
1400
1401   DefInit *TheInit;
1402   bool IsAnonymous;
1403
1404   // Class-instance values can be used by other defs.  For example, Struct<i>
1405   // is used here as a template argument to another class:
1406   //
1407   //   multiclass MultiClass<int i> {
1408   //     def Def : Class<Struct<i>>;
1409   //
1410   // These need to get fully resolved before instantiating any other
1411   // definitions that usie them (e.g. Def).  However, inside a multiclass they
1412   // can't be immediately resolved so we mark them ResolveFirst to fully
1413   // resolve them later as soon as the multiclass is instantiated.
1414   bool ResolveFirst;
1415
1416   void init();
1417   void checkName();
1418
1419 public:
1420   // Constructs a record.
1421   explicit Record(const std::string &N, ArrayRef<SMLoc> locs,
1422                   RecordKeeper &records, bool Anonymous = false) :
1423     ID(LastID++), Name(StringInit::get(N)), Locs(locs.begin(), locs.end()),
1424     TrackedRecords(records), TheInit(nullptr), IsAnonymous(Anonymous),
1425     ResolveFirst(false) {
1426     init();
1427   }
1428   explicit Record(Init *N, ArrayRef<SMLoc> locs, RecordKeeper &records,
1429                   bool Anonymous = false) :
1430     ID(LastID++), Name(N), Locs(locs.begin(), locs.end()),
1431     TrackedRecords(records), TheInit(nullptr), IsAnonymous(Anonymous),
1432     ResolveFirst(false) {
1433     init();
1434   }
1435
1436   // When copy-constructing a Record, we must still guarantee a globally unique
1437   // ID number.  All other fields can be copied normally.
1438   Record(const Record &O) :
1439     ID(LastID++), Name(O.Name), Locs(O.Locs), TemplateArgs(O.TemplateArgs),
1440     Values(O.Values), SuperClasses(O.SuperClasses),
1441     SuperClassRanges(O.SuperClassRanges), TrackedRecords(O.TrackedRecords),
1442     TheInit(O.TheInit), IsAnonymous(O.IsAnonymous),
1443     ResolveFirst(O.ResolveFirst) { }
1444
1445   ~Record() {}
1446
1447   static unsigned getNewUID() { return LastID++; }
1448
1449   unsigned getID() const { return ID; }
1450
1451   const std::string &getName() const;
1452   Init *getNameInit() const {
1453     return Name;
1454   }
1455   const std::string getNameInitAsString() const {
1456     return getNameInit()->getAsUnquotedString();
1457   }
1458
1459   void setName(Init *Name);               // Also updates RecordKeeper.
1460   void setName(const std::string &Name);  // Also updates RecordKeeper.
1461
1462   ArrayRef<SMLoc> getLoc() const { return Locs; }
1463
1464   /// get the corresponding DefInit.
1465   DefInit *getDefInit();
1466
1467   const std::vector<Init *> &getTemplateArgs() const {
1468     return TemplateArgs;
1469   }
1470   const std::vector<RecordVal> &getValues() const { return Values; }
1471   const std::vector<Record*>   &getSuperClasses() const { return SuperClasses; }
1472   ArrayRef<SMRange> getSuperClassRanges() const { return SuperClassRanges; }
1473
1474   bool isTemplateArg(Init *Name) const {
1475     for (unsigned i = 0, e = TemplateArgs.size(); i != e; ++i)
1476       if (TemplateArgs[i] == Name) return true;
1477     return false;
1478   }
1479   bool isTemplateArg(StringRef Name) const {
1480     return isTemplateArg(StringInit::get(Name.str()));
1481   }
1482
1483   const RecordVal *getValue(const Init *Name) const {
1484     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1485       if (Values[i].getNameInit() == Name) return &Values[i];
1486     return nullptr;
1487   }
1488   const RecordVal *getValue(StringRef Name) const {
1489     return getValue(StringInit::get(Name));
1490   }
1491   RecordVal *getValue(const Init *Name) {
1492     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1493       if (Values[i].getNameInit() == Name) return &Values[i];
1494     return nullptr;
1495   }
1496   RecordVal *getValue(StringRef Name) {
1497     return getValue(StringInit::get(Name));
1498   }
1499
1500   void addTemplateArg(Init *Name) {
1501     assert(!isTemplateArg(Name) && "Template arg already defined!");
1502     TemplateArgs.push_back(Name);
1503   }
1504   void addTemplateArg(StringRef Name) {
1505     addTemplateArg(StringInit::get(Name.str()));
1506   }
1507
1508   void addValue(const RecordVal &RV) {
1509     assert(getValue(RV.getNameInit()) == nullptr && "Value already added!");
1510     Values.push_back(RV);
1511     if (Values.size() > 1)
1512       // Keep NAME at the end of the list.  It makes record dumps a
1513       // bit prettier and allows TableGen tests to be written more
1514       // naturally.  Tests can use CHECK-NEXT to look for Record
1515       // fields they expect to see after a def.  They can't do that if
1516       // NAME is the first Record field.
1517       std::swap(Values[Values.size() - 2], Values[Values.size() - 1]);
1518   }
1519
1520   void removeValue(Init *Name) {
1521     for (unsigned i = 0, e = Values.size(); i != e; ++i)
1522       if (Values[i].getNameInit() == Name) {
1523         Values.erase(Values.begin()+i);
1524         return;
1525       }
1526     llvm_unreachable("Cannot remove an entry that does not exist!");
1527   }
1528
1529   void removeValue(StringRef Name) {
1530     removeValue(StringInit::get(Name.str()));
1531   }
1532
1533   bool isSubClassOf(const Record *R) const {
1534     for (unsigned i = 0, e = SuperClasses.size(); i != e; ++i)
1535       if (SuperClasses[i] == R)
1536         return true;
1537     return false;
1538   }
1539
1540   bool isSubClassOf(StringRef Name) const {
1541     for (unsigned i = 0, e = SuperClasses.size(); i != e; ++i)
1542       if (SuperClasses[i]->getNameInitAsString() == Name)
1543         return true;
1544     return false;
1545   }
1546
1547   void addSuperClass(Record *R, SMRange Range) {
1548     assert(!isSubClassOf(R) && "Already subclassing record!");
1549     SuperClasses.push_back(R);
1550     SuperClassRanges.push_back(Range);
1551   }
1552
1553   /// resolveReferences - If there are any field references that refer to fields
1554   /// that have been filled in, we can propagate the values now.
1555   ///
1556   void resolveReferences() { resolveReferencesTo(nullptr); }
1557
1558   /// resolveReferencesTo - If anything in this record refers to RV, replace the
1559   /// reference to RV with the RHS of RV.  If RV is null, we resolve all
1560   /// possible references.
1561   void resolveReferencesTo(const RecordVal *RV);
1562
1563   RecordKeeper &getRecords() const {
1564     return TrackedRecords;
1565   }
1566
1567   bool isAnonymous() const {
1568     return IsAnonymous;
1569   }
1570
1571   bool isResolveFirst() const {
1572     return ResolveFirst;
1573   }
1574
1575   void setResolveFirst(bool b) {
1576     ResolveFirst = b;
1577   }
1578
1579   void dump() const;
1580
1581   //===--------------------------------------------------------------------===//
1582   // High-level methods useful to tablegen back-ends
1583   //
1584
1585   /// getValueInit - Return the initializer for a value with the specified name,
1586   /// or throw an exception if the field does not exist.
1587   ///
1588   Init *getValueInit(StringRef FieldName) const;
1589
1590   /// Return true if the named field is unset.
1591   bool isValueUnset(StringRef FieldName) const {
1592     return getValueInit(FieldName) == UnsetInit::get();
1593   }
1594
1595   /// getValueAsString - This method looks up the specified field and returns
1596   /// its value as a string, throwing an exception if the field does not exist
1597   /// or if the value is not a string.
1598   ///
1599   std::string getValueAsString(StringRef FieldName) const;
1600
1601   /// getValueAsBitsInit - This method looks up the specified field and returns
1602   /// its value as a BitsInit, throwing an exception if the field does not exist
1603   /// or if the value is not the right type.
1604   ///
1605   BitsInit *getValueAsBitsInit(StringRef FieldName) const;
1606
1607   /// getValueAsListInit - This method looks up the specified field and returns
1608   /// its value as a ListInit, throwing an exception if the field does not exist
1609   /// or if the value is not the right type.
1610   ///
1611   ListInit *getValueAsListInit(StringRef FieldName) const;
1612
1613   /// getValueAsListOfDefs - This method looks up the specified field and
1614   /// returns its value as a vector of records, throwing an exception if the
1615   /// field does not exist or if the value is not the right type.
1616   ///
1617   std::vector<Record*> getValueAsListOfDefs(StringRef FieldName) const;
1618
1619   /// getValueAsListOfInts - This method looks up the specified field and
1620   /// returns its value as a vector of integers, throwing an exception if the
1621   /// field does not exist or if the value is not the right type.
1622   ///
1623   std::vector<int64_t> getValueAsListOfInts(StringRef FieldName) const;
1624
1625   /// getValueAsListOfStrings - This method looks up the specified field and
1626   /// returns its value as a vector of strings, throwing an exception if the
1627   /// field does not exist or if the value is not the right type.
1628   ///
1629   std::vector<std::string> getValueAsListOfStrings(StringRef FieldName) const;
1630
1631   /// getValueAsDef - This method looks up the specified field and returns its
1632   /// value as a Record, throwing an exception if the field does not exist or if
1633   /// the value is not the right type.
1634   ///
1635   Record *getValueAsDef(StringRef FieldName) const;
1636
1637   /// getValueAsBit - This method looks up the specified field and returns its
1638   /// value as a bit, throwing an exception if the field does not exist or if
1639   /// the value is not the right type.
1640   ///
1641   bool getValueAsBit(StringRef FieldName) const;
1642
1643   /// getValueAsBitOrUnset - This method looks up the specified field and
1644   /// returns its value as a bit. If the field is unset, sets Unset to true and
1645   /// returns false.
1646   ///
1647   bool getValueAsBitOrUnset(StringRef FieldName, bool &Unset) const;
1648
1649   /// getValueAsInt - This method looks up the specified field and returns its
1650   /// value as an int64_t, throwing an exception if the field does not exist or
1651   /// if the value is not the right type.
1652   ///
1653   int64_t getValueAsInt(StringRef FieldName) const;
1654
1655   /// getValueAsDag - This method looks up the specified field and returns its
1656   /// value as an Dag, throwing an exception if the field does not exist or if
1657   /// the value is not the right type.
1658   ///
1659   DagInit *getValueAsDag(StringRef FieldName) const;
1660 };
1661
1662 raw_ostream &operator<<(raw_ostream &OS, const Record &R);
1663
1664 struct MultiClass {
1665   Record Rec;  // Placeholder for template args and Name.
1666   typedef std::vector<std::unique_ptr<Record>> RecordVector;
1667   RecordVector DefPrototypes;
1668
1669   void dump() const;
1670
1671   MultiClass(const std::string &Name, SMLoc Loc, RecordKeeper &Records) :
1672     Rec(Name, Loc, Records) {}
1673 };
1674
1675 class RecordKeeper {
1676   typedef std::map<std::string, std::unique_ptr<Record>> RecordMap;
1677   RecordMap Classes, Defs;
1678
1679 public:
1680   const RecordMap &getClasses() const { return Classes; }
1681   const RecordMap &getDefs() const { return Defs; }
1682
1683   Record *getClass(const std::string &Name) const {
1684     auto I = Classes.find(Name);
1685     return I == Classes.end() ? nullptr : I->second.get();
1686   }
1687   Record *getDef(const std::string &Name) const {
1688     auto I = Defs.find(Name);
1689     return I == Defs.end() ? nullptr : I->second.get();
1690   }
1691   void addClass(std::unique_ptr<Record> R) {
1692     bool Ins = Classes.insert(std::make_pair(R->getName(),
1693                                              std::move(R))).second;
1694     (void)Ins;
1695     assert(Ins && "Class already exists");
1696   }
1697   void addDef(std::unique_ptr<Record> R) {
1698     bool Ins = Defs.insert(std::make_pair(R->getName(),
1699                                           std::move(R))).second;
1700     (void)Ins;
1701     assert(Ins && "Record already exists");
1702   }
1703
1704   //===--------------------------------------------------------------------===//
1705   // High-level helper methods, useful for tablegen backends...
1706
1707   /// getAllDerivedDefinitions - This method returns all concrete definitions
1708   /// that derive from the specified class name.  If a class with the specified
1709   /// name does not exist, an exception is thrown.
1710   std::vector<Record*>
1711   getAllDerivedDefinitions(const std::string &ClassName) const;
1712
1713   void dump() const;
1714 };
1715
1716 /// LessRecord - Sorting predicate to sort record pointers by name.
1717 ///
1718 struct LessRecord {
1719   bool operator()(const Record *Rec1, const Record *Rec2) const {
1720     return StringRef(Rec1->getName()).compare_numeric(Rec2->getName()) < 0;
1721   }
1722 };
1723
1724 /// LessRecordByID - Sorting predicate to sort record pointers by their
1725 /// unique ID. If you just need a deterministic order, use this, since it
1726 /// just compares two `unsigned`; the other sorting predicates require
1727 /// string manipulation.
1728 struct LessRecordByID {
1729   bool operator()(const Record *LHS, const Record *RHS) const {
1730     return LHS->getID() < RHS->getID();
1731   }
1732 };
1733
1734 /// LessRecordFieldName - Sorting predicate to sort record pointers by their
1735 /// name field.
1736 ///
1737 struct LessRecordFieldName {
1738   bool operator()(const Record *Rec1, const Record *Rec2) const {
1739     return Rec1->getValueAsString("Name") < Rec2->getValueAsString("Name");
1740   }
1741 };
1742
1743 struct LessRecordRegister {
1744   static size_t min(size_t a, size_t b) { return a < b ? a : b; }
1745   static bool ascii_isdigit(char x) { return x >= '0' && x <= '9'; }
1746
1747   struct RecordParts {
1748     SmallVector<std::pair< bool, StringRef>, 4> Parts;
1749
1750     RecordParts(StringRef Rec) {
1751       if (Rec.empty())
1752         return;
1753
1754       size_t Len = 0;
1755       const char *Start = Rec.data();
1756       const char *Curr = Start;
1757       bool isDigitPart = ascii_isdigit(Curr[0]);
1758       for (size_t I = 0, E = Rec.size(); I != E; ++I, ++Len) {
1759         bool isDigit = ascii_isdigit(Curr[I]);
1760         if (isDigit != isDigitPart) {
1761           Parts.push_back(std::make_pair(isDigitPart, StringRef(Start, Len)));
1762           Len = 0;
1763           Start = &Curr[I];
1764           isDigitPart = ascii_isdigit(Curr[I]);
1765         }
1766       }
1767       // Push the last part.
1768       Parts.push_back(std::make_pair(isDigitPart, StringRef(Start, Len)));
1769     }
1770
1771     size_t size() { return Parts.size(); }
1772
1773     std::pair<bool, StringRef> getPart(size_t i) {
1774       assert (i < Parts.size() && "Invalid idx!");
1775       return Parts[i];
1776     }
1777   };
1778
1779   bool operator()(const Record *Rec1, const Record *Rec2) const {
1780     RecordParts LHSParts(StringRef(Rec1->getName()));
1781     RecordParts RHSParts(StringRef(Rec2->getName()));
1782
1783     size_t LHSNumParts = LHSParts.size();
1784     size_t RHSNumParts = RHSParts.size();
1785     assert (LHSNumParts && RHSNumParts && "Expected at least one part!");
1786
1787     if (LHSNumParts != RHSNumParts)
1788       return LHSNumParts < RHSNumParts;
1789
1790     // We expect the registers to be of the form [_a-zA-z]+([0-9]*[_a-zA-Z]*)*.
1791     for (size_t I = 0, E = LHSNumParts; I < E; I+=2) {
1792       std::pair<bool, StringRef> LHSPart = LHSParts.getPart(I);
1793       std::pair<bool, StringRef> RHSPart = RHSParts.getPart(I);
1794       // Expect even part to always be alpha.
1795       assert (LHSPart.first == false && RHSPart.first == false &&
1796               "Expected both parts to be alpha.");
1797       if (int Res = LHSPart.second.compare(RHSPart.second))
1798         return Res < 0;
1799     }
1800     for (size_t I = 1, E = LHSNumParts; I < E; I+=2) {
1801       std::pair<bool, StringRef> LHSPart = LHSParts.getPart(I);
1802       std::pair<bool, StringRef> RHSPart = RHSParts.getPart(I);
1803       // Expect odd part to always be numeric.
1804       assert (LHSPart.first == true && RHSPart.first == true &&
1805               "Expected both parts to be numeric.");
1806       if (LHSPart.second.size() != RHSPart.second.size())
1807         return LHSPart.second.size() < RHSPart.second.size();
1808
1809       unsigned LHSVal, RHSVal;
1810
1811       bool LHSFailed = LHSPart.second.getAsInteger(10, LHSVal); (void)LHSFailed;
1812       assert(!LHSFailed && "Unable to convert LHS to integer.");
1813       bool RHSFailed = RHSPart.second.getAsInteger(10, RHSVal); (void)RHSFailed;
1814       assert(!RHSFailed && "Unable to convert RHS to integer.");
1815
1816       if (LHSVal != RHSVal)
1817         return LHSVal < RHSVal;
1818     }
1819     return LHSNumParts < RHSNumParts;
1820   }
1821 };
1822
1823 raw_ostream &operator<<(raw_ostream &OS, const RecordKeeper &RK);
1824
1825 /// QualifyName - Return an Init with a qualifier prefix referring
1826 /// to CurRec's name.
1827 Init *QualifyName(Record &CurRec, MultiClass *CurMultiClass,
1828                   Init *Name, const std::string &Scoper);
1829
1830 /// QualifyName - Return an Init with a qualifier prefix referring
1831 /// to CurRec's name.
1832 Init *QualifyName(Record &CurRec, MultiClass *CurMultiClass,
1833                   const std::string &Name, const std::string &Scoper);
1834
1835 } // End llvm namespace
1836
1837 #endif