utils/TableGen/DAGISelMatcher.h

   1 //===- DAGISelMatcher.h - Representation of DAG pattern matcher -*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_UTILS_TABLEGEN_DAGISELMATCHER_H
  10 #define LLVM_UTILS_TABLEGEN_DAGISELMATCHER_H
  11
  12 #include "llvm/ADT/ArrayRef.h"
  13 #include "llvm/ADT/SmallVector.h"
  14 #include "llvm/ADT/StringRef.h"
  15 #include "llvm/Support/Casting.h"
  16 #include "llvm/Support/MachineValueType.h"
  17
  18 namespace llvm {
  19   struct CodeGenRegister;
  20   class CodeGenDAGPatterns;
  21   class Matcher;
  22   class PatternToMatch;
  23   class raw_ostream;
  24   class ComplexPattern;
  25   class Record;
  26   class SDNodeInfo;
  27   class TreePredicateFn;
  28   class TreePattern;
  29
  30 Matcher *ConvertPatternToMatcher(const PatternToMatch &Pattern,unsigned Variant,
  31                                  const CodeGenDAGPatterns &CGP);
  32 void OptimizeMatcher(std::unique_ptr<Matcher> &Matcher,
  33                      const CodeGenDAGPatterns &CGP);
  34 void EmitMatcherTable(const Matcher *Matcher, const CodeGenDAGPatterns &CGP,
  35                       raw_ostream &OS);
  36
  37
  38 /// Matcher - Base class for all the DAG ISel Matcher representation
  39 /// nodes.
  40 class Matcher {
  41   // The next matcher node that is executed after this one.  Null if this is the
  42   // last stage of a match.
  43   std::unique_ptr<Matcher> Next;
  44   virtual void anchor();
  45 public:
  46   enum KindTy {
  47     // Matcher state manipulation.
  48     Scope,                // Push a checking scope.
  49     RecordNode,           // Record the current node.
  50     RecordChild,          // Record a child of the current node.
  51     RecordMemRef,         // Record the memref in the current node.
  52     CaptureGlueInput,     // If the current node has an input glue, save it.
  53     MoveChild,            // Move current node to specified child.
  54     MoveParent,           // Move current node to parent.
  55
  56     // Predicate checking.
  57     CheckSame,            // Fail if not same as prev match.
  58     CheckChildSame,       // Fail if child not same as prev match.
  59     CheckPatternPredicate,
  60     CheckPredicate,       // Fail if node predicate fails.
  61     CheckOpcode,          // Fail if not opcode.
  62     SwitchOpcode,         // Dispatch based on opcode.
  63     CheckType,            // Fail if not correct type.
  64     SwitchType,           // Dispatch based on type.
  65     CheckChildType,       // Fail if child has wrong type.
  66     CheckInteger,         // Fail if wrong val.
  67     CheckChildInteger,    // Fail if child is wrong val.
  68     CheckCondCode,        // Fail if not condcode.
  69     CheckChild2CondCode,  // Fail if child is wrong condcode.
  70     CheckValueType,
  71     CheckComplexPat,
  72     CheckAndImm,
  73     CheckOrImm,
  74     CheckImmAllOnesV,
  75     CheckImmAllZerosV,
  76     CheckFoldableChainNode,
  77
  78     // Node creation/emisssion.
  79     EmitInteger,          // Create a TargetConstant
  80     EmitStringInteger,    // Create a TargetConstant from a string.
  81     EmitRegister,         // Create a register.
  82     EmitConvertToTarget,  // Convert a imm/fpimm to target imm/fpimm
  83     EmitMergeInputChains, // Merge together a chains for an input.
  84     EmitCopyToReg,        // Emit a copytoreg into a physreg.
  85     EmitNode,             // Create a DAG node
  86     EmitNodeXForm,        // Run a SDNodeXForm
  87     CompleteMatch,        // Finish a match and update the results.
  88     MorphNodeTo           // Build a node, finish a match and update results.
  89   };
  90   const KindTy Kind;
  91
  92 protected:
  93   Matcher(KindTy K) : Kind(K) {}
  94 public:
  95   virtual ~Matcher() {}
  96
  97   KindTy getKind() const { return Kind; }
  98
  99   Matcher *getNext() { return Next.get(); }
 100   const Matcher *getNext() const { return Next.get(); }
 101   void setNext(Matcher *C) { Next.reset(C); }
 102   Matcher *takeNext() { return Next.release(); }
 103
 104   std::unique_ptr<Matcher> &getNextPtr() { return Next; }
 105
 106   bool isEqual(const Matcher *M) const {
 107     if (getKind() != M->getKind()) return false;
 108     return isEqualImpl(M);
 109   }
 110
 111   /// isSimplePredicateNode - Return true if this is a simple predicate that
 112   /// operates on the node or its children without potential side effects or a
 113   /// change of the current node.
 114   bool isSimplePredicateNode() const {
 115     switch (getKind()) {
 116     default: return false;
 117     case CheckSame:
 118     case CheckChildSame:
 119     case CheckPatternPredicate:
 120     case CheckPredicate:
 121     case CheckOpcode:
 122     case CheckType:
 123     case CheckChildType:
 124     case CheckInteger:
 125     case CheckChildInteger:
 126     case CheckCondCode:
 127     case CheckChild2CondCode:
 128     case CheckValueType:
 129     case CheckAndImm:
 130     case CheckOrImm:
 131     case CheckImmAllOnesV:
 132     case CheckImmAllZerosV:
 133     case CheckFoldableChainNode:
 134       return true;
 135     }
 136   }
 137
 138   /// isSimplePredicateOrRecordNode - Return true if this is a record node or
 139   /// a simple predicate.
 140   bool isSimplePredicateOrRecordNode() const {
 141     return isSimplePredicateNode() ||
 142            getKind() == RecordNode || getKind() == RecordChild;
 143   }
 144
 145   /// unlinkNode - Unlink the specified node from this chain.  If Other == this,
 146   /// we unlink the next pointer and return it.  Otherwise we unlink Other from
 147   /// the list and return this.
 148   Matcher *unlinkNode(Matcher *Other);
 149
 150   /// canMoveBefore - Return true if this matcher is the same as Other, or if
 151   /// we can move this matcher past all of the nodes in-between Other and this
 152   /// node.  Other must be equal to or before this.
 153   bool canMoveBefore(const Matcher *Other) const;
 154
 155   /// canMoveBeforeNode - Return true if it is safe to move the current matcher
 156   /// across the specified one.
 157   bool canMoveBeforeNode(const Matcher *Other) const;
 158
 159   /// isContradictory - Return true of these two matchers could never match on
 160   /// the same node.
 161   bool isContradictory(const Matcher *Other) const {
 162     // Since this predicate is reflexive, we canonicalize the ordering so that
 163     // we always match a node against nodes with kinds that are greater or equal
 164     // to them.  For example, we'll pass in a CheckType node as an argument to
 165     // the CheckOpcode method, not the other way around.
 166     if (getKind() < Other->getKind())
 167       return isContradictoryImpl(Other);
 168     return Other->isContradictoryImpl(this);
 169   }
 170
 171   void print(raw_ostream &OS, unsigned indent = 0) const;
 172   void printOne(raw_ostream &OS) const;
 173   void dump() const;
 174 protected:
 175   virtual void printImpl(raw_ostream &OS, unsigned indent) const = 0;
 176   virtual bool isEqualImpl(const Matcher *M) const = 0;
 177   virtual bool isContradictoryImpl(const Matcher *M) const { return false; }
 178 };
 179
 180 /// ScopeMatcher - This attempts to match each of its children to find the first
 181 /// one that successfully matches.  If one child fails, it tries the next child.
 182 /// If none of the children match then this check fails.  It never has a 'next'.
 183 class ScopeMatcher : public Matcher {
 184   SmallVector<Matcher*, 4> Children;
 185 public:
 186   ScopeMatcher(ArrayRef<Matcher *> children)
 187     : Matcher(Scope), Children(children.begin(), children.end()) {
 188   }
 189   ~ScopeMatcher() override;
 190
 191   unsigned getNumChildren() const { return Children.size(); }
 192
 193   Matcher *getChild(unsigned i) { return Children[i]; }
 194   const Matcher *getChild(unsigned i) const { return Children[i]; }
 195
 196   void resetChild(unsigned i, Matcher *N) {
 197     delete Children[i];
 198     Children[i] = N;
 199   }
 200
 201   Matcher *takeChild(unsigned i) {
 202     Matcher *Res = Children[i];
 203     Children[i] = nullptr;
 204     return Res;
 205   }
 206
 207   void setNumChildren(unsigned NC) {
 208     if (NC < Children.size()) {
 209       // delete any children we're about to lose pointers to.
 210       for (unsigned i = NC, e = Children.size(); i != e; ++i)
 211         delete Children[i];
 212     }
 213     Children.resize(NC);
 214   }
 215
 216   static bool classof(const Matcher *N) {
 217     return N->getKind() == Scope;
 218   }
 219
 220 private:
 221   void printImpl(raw_ostream &OS, unsigned indent) const override;
 222   bool isEqualImpl(const Matcher *M) const override { return false; }
 223 };
 224
 225 /// RecordMatcher - Save the current node in the operand list.
 226 class RecordMatcher : public Matcher {
 227   /// WhatFor - This is a string indicating why we're recording this.  This
 228   /// should only be used for comment generation not anything semantic.
 229   std::string WhatFor;
 230
 231   /// ResultNo - The slot number in the RecordedNodes vector that this will be,
 232   /// just printed as a comment.
 233   unsigned ResultNo;
 234 public:
 235   RecordMatcher(const std::string &whatfor, unsigned resultNo)
 236     : Matcher(RecordNode), WhatFor(whatfor), ResultNo(resultNo) {}
 237
 238   const std::string &getWhatFor() const { return WhatFor; }
 239   unsigned getResultNo() const { return ResultNo; }
 240
 241   static bool classof(const Matcher *N) {
 242     return N->getKind() == RecordNode;
 243   }
 244
 245 private:
 246   void printImpl(raw_ostream &OS, unsigned indent) const override;
 247   bool isEqualImpl(const Matcher *M) const override { return true; }
 248 };
 249
 250 /// RecordChildMatcher - Save a numbered child of the current node, or fail
 251 /// the match if it doesn't exist.  This is logically equivalent to:
 252 ///    MoveChild N + RecordNode + MoveParent.
 253 class RecordChildMatcher : public Matcher {
 254   unsigned ChildNo;
 255
 256   /// WhatFor - This is a string indicating why we're recording this.  This
 257   /// should only be used for comment generation not anything semantic.
 258   std::string WhatFor;
 259
 260   /// ResultNo - The slot number in the RecordedNodes vector that this will be,
 261   /// just printed as a comment.
 262   unsigned ResultNo;
 263 public:
 264   RecordChildMatcher(unsigned childno, const std::string &whatfor,
 265                      unsigned resultNo)
 266   : Matcher(RecordChild), ChildNo(childno), WhatFor(whatfor),
 267     ResultNo(resultNo) {}
 268
 269   unsigned getChildNo() const { return ChildNo; }
 270   const std::string &getWhatFor() const { return WhatFor; }
 271   unsigned getResultNo() const { return ResultNo; }
 272
 273   static bool classof(const Matcher *N) {
 274     return N->getKind() == RecordChild;
 275   }
 276
 277 private:
 278   void printImpl(raw_ostream &OS, unsigned indent) const override;
 279   bool isEqualImpl(const Matcher *M) const override {
 280     return cast<RecordChildMatcher>(M)->getChildNo() == getChildNo();
 281   }
 282 };
 283
 284 /// RecordMemRefMatcher - Save the current node's memref.
 285 class RecordMemRefMatcher : public Matcher {
 286 public:
 287   RecordMemRefMatcher() : Matcher(RecordMemRef) {}
 288
 289   static bool classof(const Matcher *N) {
 290     return N->getKind() == RecordMemRef;
 291   }
 292
 293 private:
 294   void printImpl(raw_ostream &OS, unsigned indent) const override;
 295   bool isEqualImpl(const Matcher *M) const override { return true; }
 296 };
 297
 298
 299 /// CaptureGlueInputMatcher - If the current record has a glue input, record
 300 /// it so that it is used as an input to the generated code.
 301 class CaptureGlueInputMatcher : public Matcher {
 302 public:
 303   CaptureGlueInputMatcher() : Matcher(CaptureGlueInput) {}
 304
 305   static bool classof(const Matcher *N) {
 306     return N->getKind() == CaptureGlueInput;
 307   }
 308
 309 private:
 310   void printImpl(raw_ostream &OS, unsigned indent) const override;
 311   bool isEqualImpl(const Matcher *M) const override { return true; }
 312 };
 313
 314 /// MoveChildMatcher - This tells the interpreter to move into the
 315 /// specified child node.
 316 class MoveChildMatcher : public Matcher {
 317   unsigned ChildNo;
 318 public:
 319   MoveChildMatcher(unsigned childNo) : Matcher(MoveChild), ChildNo(childNo) {}
 320
 321   unsigned getChildNo() const { return ChildNo; }
 322
 323   static bool classof(const Matcher *N) {
 324     return N->getKind() == MoveChild;
 325   }
 326
 327 private:
 328   void printImpl(raw_ostream &OS, unsigned indent) const override;
 329   bool isEqualImpl(const Matcher *M) const override {
 330     return cast<MoveChildMatcher>(M)->getChildNo() == getChildNo();
 331   }
 332 };
 333
 334 /// MoveParentMatcher - This tells the interpreter to move to the parent
 335 /// of the current node.
 336 class MoveParentMatcher : public Matcher {
 337 public:
 338   MoveParentMatcher() : Matcher(MoveParent) {}
 339
 340   static bool classof(const Matcher *N) {
 341     return N->getKind() == MoveParent;
 342   }
 343
 344 private:
 345   void printImpl(raw_ostream &OS, unsigned indent) const override;
 346   bool isEqualImpl(const Matcher *M) const override { return true; }
 347 };
 348
 349 /// CheckSameMatcher - This checks to see if this node is exactly the same
 350 /// node as the specified match that was recorded with 'Record'.  This is used
 351 /// when patterns have the same name in them, like '(mul GPR:$in, GPR:$in)'.
 352 class CheckSameMatcher : public Matcher {
 353   unsigned MatchNumber;
 354 public:
 355   CheckSameMatcher(unsigned matchnumber)
 356     : Matcher(CheckSame), MatchNumber(matchnumber) {}
 357
 358   unsigned getMatchNumber() const { return MatchNumber; }
 359
 360   static bool classof(const Matcher *N) {
 361     return N->getKind() == CheckSame;
 362   }
 363
 364 private:
 365   void printImpl(raw_ostream &OS, unsigned indent) const override;
 366   bool isEqualImpl(const Matcher *M) const override {
 367     return cast<CheckSameMatcher>(M)->getMatchNumber() == getMatchNumber();
 368   }
 369 };
 370
 371 /// CheckChildSameMatcher - This checks to see if child node is exactly the same
 372 /// node as the specified match that was recorded with 'Record'.  This is used
 373 /// when patterns have the same name in them, like '(mul GPR:$in, GPR:$in)'.
 374 class CheckChildSameMatcher : public Matcher {
 375   unsigned ChildNo;
 376   unsigned MatchNumber;
 377 public:
 378   CheckChildSameMatcher(unsigned childno, unsigned matchnumber)
 379     : Matcher(CheckChildSame), ChildNo(childno), MatchNumber(matchnumber) {}
 380
 381   unsigned getChildNo() const { return ChildNo; }
 382   unsigned getMatchNumber() const { return MatchNumber; }
 383
 384   static bool classof(const Matcher *N) {
 385     return N->getKind() == CheckChildSame;
 386   }
 387
 388 private:
 389   void printImpl(raw_ostream &OS, unsigned indent) const override;
 390   bool isEqualImpl(const Matcher *M) const override {
 391     return cast<CheckChildSameMatcher>(M)->ChildNo == ChildNo &&
 392            cast<CheckChildSameMatcher>(M)->MatchNumber == MatchNumber;
 393   }
 394 };
 395
 396 /// CheckPatternPredicateMatcher - This checks the target-specific predicate
 397 /// to see if the entire pattern is capable of matching.  This predicate does
 398 /// not take a node as input.  This is used for subtarget feature checks etc.
 399 class CheckPatternPredicateMatcher : public Matcher {
 400   std::string Predicate;
 401 public:
 402   CheckPatternPredicateMatcher(StringRef predicate)
 403     : Matcher(CheckPatternPredicate), Predicate(predicate) {}
 404
 405   StringRef getPredicate() const { return Predicate; }
 406
 407   static bool classof(const Matcher *N) {
 408     return N->getKind() == CheckPatternPredicate;
 409   }
 410
 411 private:
 412   void printImpl(raw_ostream &OS, unsigned indent) const override;
 413   bool isEqualImpl(const Matcher *M) const override {
 414     return cast<CheckPatternPredicateMatcher>(M)->getPredicate() == Predicate;
 415   }
 416 };
 417
 418 /// CheckPredicateMatcher - This checks the target-specific predicate to
 419 /// see if the node is acceptable.
 420 class CheckPredicateMatcher : public Matcher {
 421   TreePattern *Pred;
 422   const SmallVector<unsigned, 4> Operands;
 423 public:
 424   CheckPredicateMatcher(const TreePredicateFn &pred,
 425                         const SmallVectorImpl<unsigned> &Operands);
 426
 427   TreePredicateFn getPredicate() const;
 428   unsigned getNumOperands() const;
 429   unsigned getOperandNo(unsigned i) const;
 430
 431   static bool classof(const Matcher *N) {
 432     return N->getKind() == CheckPredicate;
 433   }
 434
 435 private:
 436   void printImpl(raw_ostream &OS, unsigned indent) const override;
 437   bool isEqualImpl(const Matcher *M) const override {
 438     return cast<CheckPredicateMatcher>(M)->Pred == Pred;
 439   }
 440 };
 441
 442
 443 /// CheckOpcodeMatcher - This checks to see if the current node has the
 444 /// specified opcode, if not it fails to match.
 445 class CheckOpcodeMatcher : public Matcher {
 446   const SDNodeInfo &Opcode;
 447 public:
 448   CheckOpcodeMatcher(const SDNodeInfo &opcode)
 449     : Matcher(CheckOpcode), Opcode(opcode) {}
 450
 451   const SDNodeInfo &getOpcode() const { return Opcode; }
 452
 453   static bool classof(const Matcher *N) {
 454     return N->getKind() == CheckOpcode;
 455   }
 456
 457 private:
 458   void printImpl(raw_ostream &OS, unsigned indent) const override;
 459   bool isEqualImpl(const Matcher *M) const override;
 460   bool isContradictoryImpl(const Matcher *M) const override;
 461 };
 462
 463 /// SwitchOpcodeMatcher - Switch based on the current node's opcode, dispatching
 464 /// to one matcher per opcode.  If the opcode doesn't match any of the cases,
 465 /// then the match fails.  This is semantically equivalent to a Scope node where
 466 /// every child does a CheckOpcode, but is much faster.
 467 class SwitchOpcodeMatcher : public Matcher {
 468   SmallVector<std::pair<const SDNodeInfo*, Matcher*>, 8> Cases;
 469 public:
 470   SwitchOpcodeMatcher(ArrayRef<std::pair<const SDNodeInfo*, Matcher*> > cases)
 471     : Matcher(SwitchOpcode), Cases(cases.begin(), cases.end()) {}
 472   ~SwitchOpcodeMatcher() override;
 473
 474   static bool classof(const Matcher *N) {
 475     return N->getKind() == SwitchOpcode;
 476   }
 477
 478   unsigned getNumCases() const { return Cases.size(); }
 479
 480   const SDNodeInfo &getCaseOpcode(unsigned i) const { return *Cases[i].first; }
 481   Matcher *getCaseMatcher(unsigned i) { return Cases[i].second; }
 482   const Matcher *getCaseMatcher(unsigned i) const { return Cases[i].second; }
 483
 484 private:
 485   void printImpl(raw_ostream &OS, unsigned indent) const override;
 486   bool isEqualImpl(const Matcher *M) const override { return false; }
 487 };
 488
 489 /// CheckTypeMatcher - This checks to see if the current node has the
 490 /// specified type at the specified result, if not it fails to match.
 491 class CheckTypeMatcher : public Matcher {
 492   MVT::SimpleValueType Type;
 493   unsigned ResNo;
 494 public:
 495   CheckTypeMatcher(MVT::SimpleValueType type, unsigned resno)
 496     : Matcher(CheckType), Type(type), ResNo(resno) {}
 497
 498   MVT::SimpleValueType getType() const { return Type; }
 499   unsigned getResNo() const { return ResNo; }
 500
 501   static bool classof(const Matcher *N) {
 502     return N->getKind() == CheckType;
 503   }
 504
 505 private:
 506   void printImpl(raw_ostream &OS, unsigned indent) const override;
 507   bool isEqualImpl(const Matcher *M) const override {
 508     return cast<CheckTypeMatcher>(M)->Type == Type;
 509   }
 510   bool isContradictoryImpl(const Matcher *M) const override;
 511 };
 512
 513 /// SwitchTypeMatcher - Switch based on the current node's type, dispatching
 514 /// to one matcher per case.  If the type doesn't match any of the cases,
 515 /// then the match fails.  This is semantically equivalent to a Scope node where
 516 /// every child does a CheckType, but is much faster.
 517 class SwitchTypeMatcher : public Matcher {
 518   SmallVector<std::pair<MVT::SimpleValueType, Matcher*>, 8> Cases;
 519 public:
 520   SwitchTypeMatcher(ArrayRef<std::pair<MVT::SimpleValueType, Matcher*> > cases)
 521   : Matcher(SwitchType), Cases(cases.begin(), cases.end()) {}
 522   ~SwitchTypeMatcher() override;
 523
 524   static bool classof(const Matcher *N) {
 525     return N->getKind() == SwitchType;
 526   }
 527
 528   unsigned getNumCases() const { return Cases.size(); }
 529
 530   MVT::SimpleValueType getCaseType(unsigned i) const { return Cases[i].first; }
 531   Matcher *getCaseMatcher(unsigned i) { return Cases[i].second; }
 532   const Matcher *getCaseMatcher(unsigned i) const { return Cases[i].second; }
 533
 534 private:
 535   void printImpl(raw_ostream &OS, unsigned indent) const override;
 536   bool isEqualImpl(const Matcher *M) const override { return false; }
 537 };
 538
 539
 540 /// CheckChildTypeMatcher - This checks to see if a child node has the
 541 /// specified type, if not it fails to match.
 542 class CheckChildTypeMatcher : public Matcher {
 543   unsigned ChildNo;
 544   MVT::SimpleValueType Type;
 545 public:
 546   CheckChildTypeMatcher(unsigned childno, MVT::SimpleValueType type)
 547     : Matcher(CheckChildType), ChildNo(childno), Type(type) {}
 548
 549   unsigned getChildNo() const { return ChildNo; }
 550   MVT::SimpleValueType getType() const { return Type; }
 551
 552   static bool classof(const Matcher *N) {
 553     return N->getKind() == CheckChildType;
 554   }
 555
 556 private:
 557   void printImpl(raw_ostream &OS, unsigned indent) const override;
 558   bool isEqualImpl(const Matcher *M) const override {
 559     return cast<CheckChildTypeMatcher>(M)->ChildNo == ChildNo &&
 560            cast<CheckChildTypeMatcher>(M)->Type == Type;
 561   }
 562   bool isContradictoryImpl(const Matcher *M) const override;
 563 };
 564
 565
 566 /// CheckIntegerMatcher - This checks to see if the current node is a
 567 /// ConstantSDNode with the specified integer value, if not it fails to match.
 568 class CheckIntegerMatcher : public Matcher {
 569   int64_t Value;
 570 public:
 571   CheckIntegerMatcher(int64_t value)
 572     : Matcher(CheckInteger), Value(value) {}
 573
 574   int64_t getValue() const { return Value; }
 575
 576   static bool classof(const Matcher *N) {
 577     return N->getKind() == CheckInteger;
 578   }
 579
 580 private:
 581   void printImpl(raw_ostream &OS, unsigned indent) const override;
 582   bool isEqualImpl(const Matcher *M) const override {
 583     return cast<CheckIntegerMatcher>(M)->Value == Value;
 584   }
 585   bool isContradictoryImpl(const Matcher *M) const override;
 586 };
 587
 588 /// CheckChildIntegerMatcher - This checks to see if the child node is a
 589 /// ConstantSDNode with a specified integer value, if not it fails to match.
 590 class CheckChildIntegerMatcher : public Matcher {
 591   unsigned ChildNo;
 592   int64_t Value;
 593 public:
 594   CheckChildIntegerMatcher(unsigned childno, int64_t value)
 595     : Matcher(CheckChildInteger), ChildNo(childno), Value(value) {}
 596
 597   unsigned getChildNo() const { return ChildNo; }
 598   int64_t getValue() const { return Value; }
 599
 600   static bool classof(const Matcher *N) {
 601     return N->getKind() == CheckChildInteger;
 602   }
 603
 604 private:
 605   void printImpl(raw_ostream &OS, unsigned indent) const override;
 606   bool isEqualImpl(const Matcher *M) const override {
 607     return cast<CheckChildIntegerMatcher>(M)->ChildNo == ChildNo &&
 608            cast<CheckChildIntegerMatcher>(M)->Value == Value;
 609   }
 610   bool isContradictoryImpl(const Matcher *M) const override;
 611 };
 612
 613 /// CheckCondCodeMatcher - This checks to see if the current node is a
 614 /// CondCodeSDNode with the specified condition, if not it fails to match.
 615 class CheckCondCodeMatcher : public Matcher {
 616   StringRef CondCodeName;
 617 public:
 618   CheckCondCodeMatcher(StringRef condcodename)
 619     : Matcher(CheckCondCode), CondCodeName(condcodename) {}
 620
 621   StringRef getCondCodeName() const { return CondCodeName; }
 622
 623   static bool classof(const Matcher *N) {
 624     return N->getKind() == CheckCondCode;
 625   }
 626
 627 private:
 628   void printImpl(raw_ostream &OS, unsigned indent) const override;
 629   bool isEqualImpl(const Matcher *M) const override {
 630     return cast<CheckCondCodeMatcher>(M)->CondCodeName == CondCodeName;
 631   }
 632 };
 633
 634 /// CheckChild2CondCodeMatcher - This checks to see if child 2 node is a
 635 /// CondCodeSDNode with the specified condition, if not it fails to match.
 636 class CheckChild2CondCodeMatcher : public Matcher {
 637   StringRef CondCodeName;
 638 public:
 639   CheckChild2CondCodeMatcher(StringRef condcodename)
 640     : Matcher(CheckChild2CondCode), CondCodeName(condcodename) {}
 641
 642   StringRef getCondCodeName() const { return CondCodeName; }
 643
 644   static bool classof(const Matcher *N) {
 645     return N->getKind() == CheckChild2CondCode;
 646   }
 647
 648 private:
 649   void printImpl(raw_ostream &OS, unsigned indent) const override;
 650   bool isEqualImpl(const Matcher *M) const override {
 651     return cast<CheckChild2CondCodeMatcher>(M)->CondCodeName == CondCodeName;
 652   }
 653 };
 654
 655 /// CheckValueTypeMatcher - This checks to see if the current node is a
 656 /// VTSDNode with the specified type, if not it fails to match.
 657 class CheckValueTypeMatcher : public Matcher {
 658   StringRef TypeName;
 659 public:
 660   CheckValueTypeMatcher(StringRef type_name)
 661     : Matcher(CheckValueType), TypeName(type_name) {}
 662
 663   StringRef getTypeName() const { return TypeName; }
 664
 665   static bool classof(const Matcher *N) {
 666     return N->getKind() == CheckValueType;
 667   }
 668
 669 private:
 670   void printImpl(raw_ostream &OS, unsigned indent) const override;
 671   bool isEqualImpl(const Matcher *M) const override {
 672     return cast<CheckValueTypeMatcher>(M)->TypeName == TypeName;
 673   }
 674   bool isContradictoryImpl(const Matcher *M) const override;
 675 };
 676
 677
 678
 679 /// CheckComplexPatMatcher - This node runs the specified ComplexPattern on
 680 /// the current node.
 681 class CheckComplexPatMatcher : public Matcher {
 682   const ComplexPattern &Pattern;
 683
 684   /// MatchNumber - This is the recorded nodes slot that contains the node we
 685   /// want to match against.
 686   unsigned MatchNumber;
 687
 688   /// Name - The name of the node we're matching, for comment emission.
 689   std::string Name;
 690
 691   /// FirstResult - This is the first slot in the RecordedNodes list that the
 692   /// result of the match populates.
 693   unsigned FirstResult;
 694 public:
 695   CheckComplexPatMatcher(const ComplexPattern &pattern, unsigned matchnumber,
 696                          const std::string &name, unsigned firstresult)
 697     : Matcher(CheckComplexPat), Pattern(pattern), MatchNumber(matchnumber),
 698       Name(name), FirstResult(firstresult) {}
 699
 700   const ComplexPattern &getPattern() const { return Pattern; }
 701   unsigned getMatchNumber() const { return MatchNumber; }
 702
 703   const std::string getName() const { return Name; }
 704   unsigned getFirstResult() const { return FirstResult; }
 705
 706   static bool classof(const Matcher *N) {
 707     return N->getKind() == CheckComplexPat;
 708   }
 709
 710 private:
 711   void printImpl(raw_ostream &OS, unsigned indent) const override;
 712   bool isEqualImpl(const Matcher *M) const override {
 713     return &cast<CheckComplexPatMatcher>(M)->Pattern == &Pattern &&
 714            cast<CheckComplexPatMatcher>(M)->MatchNumber == MatchNumber;
 715   }
 716 };
 717
 718 /// CheckAndImmMatcher - This checks to see if the current node is an 'and'
 719 /// with something equivalent to the specified immediate.
 720 class CheckAndImmMatcher : public Matcher {
 721   int64_t Value;
 722 public:
 723   CheckAndImmMatcher(int64_t value)
 724     : Matcher(CheckAndImm), Value(value) {}
 725
 726   int64_t getValue() const { return Value; }
 727
 728   static bool classof(const Matcher *N) {
 729     return N->getKind() == CheckAndImm;
 730   }
 731
 732 private:
 733   void printImpl(raw_ostream &OS, unsigned indent) const override;
 734   bool isEqualImpl(const Matcher *M) const override {
 735     return cast<CheckAndImmMatcher>(M)->Value == Value;
 736   }
 737 };
 738
 739 /// CheckOrImmMatcher - This checks to see if the current node is an 'and'
 740 /// with something equivalent to the specified immediate.
 741 class CheckOrImmMatcher : public Matcher {
 742   int64_t Value;
 743 public:
 744   CheckOrImmMatcher(int64_t value)
 745     : Matcher(CheckOrImm), Value(value) {}
 746
 747   int64_t getValue() const { return Value; }
 748
 749   static bool classof(const Matcher *N) {
 750     return N->getKind() == CheckOrImm;
 751   }
 752
 753 private:
 754   void printImpl(raw_ostream &OS, unsigned indent) const override;
 755   bool isEqualImpl(const Matcher *M) const override {
 756     return cast<CheckOrImmMatcher>(M)->Value == Value;
 757   }
 758 };
 759
 760 /// CheckImmAllOnesVMatcher - This check if the current node is an build vector
 761 /// of all ones.
 762 class CheckImmAllOnesVMatcher : public Matcher {
 763 public:
 764   CheckImmAllOnesVMatcher() : Matcher(CheckImmAllOnesV) {}
 765
 766   static bool classof(const Matcher *N) {
 767     return N->getKind() == CheckImmAllOnesV;
 768   }
 769
 770 private:
 771   void printImpl(raw_ostream &OS, unsigned indent) const override;
 772   bool isEqualImpl(const Matcher *M) const override { return true; }
 773   bool isContradictoryImpl(const Matcher *M) const override;
 774 };
 775
 776 /// CheckImmAllZerosVMatcher - This check if the current node is an build vector
 777 /// of all zeros.
 778 class CheckImmAllZerosVMatcher : public Matcher {
 779 public:
 780   CheckImmAllZerosVMatcher() : Matcher(CheckImmAllZerosV) {}
 781
 782   static bool classof(const Matcher *N) {
 783     return N->getKind() == CheckImmAllZerosV;
 784   }
 785
 786 private:
 787   void printImpl(raw_ostream &OS, unsigned indent) const override;
 788   bool isEqualImpl(const Matcher *M) const override { return true; }
 789   bool isContradictoryImpl(const Matcher *M) const override;
 790 };
 791
 792 /// CheckFoldableChainNodeMatcher - This checks to see if the current node
 793 /// (which defines a chain operand) is safe to fold into a larger pattern.
 794 class CheckFoldableChainNodeMatcher : public Matcher {
 795 public:
 796   CheckFoldableChainNodeMatcher()
 797     : Matcher(CheckFoldableChainNode) {}
 798
 799   static bool classof(const Matcher *N) {
 800     return N->getKind() == CheckFoldableChainNode;
 801   }
 802
 803 private:
 804   void printImpl(raw_ostream &OS, unsigned indent) const override;
 805   bool isEqualImpl(const Matcher *M) const override { return true; }
 806 };
 807
 808 /// EmitIntegerMatcher - This creates a new TargetConstant.
 809 class EmitIntegerMatcher : public Matcher {
 810   int64_t Val;
 811   MVT::SimpleValueType VT;
 812 public:
 813   EmitIntegerMatcher(int64_t val, MVT::SimpleValueType vt)
 814     : Matcher(EmitInteger), Val(val), VT(vt) {}
 815
 816   int64_t getValue() const { return Val; }
 817   MVT::SimpleValueType getVT() const { return VT; }
 818
 819   static bool classof(const Matcher *N) {
 820     return N->getKind() == EmitInteger;
 821   }
 822
 823 private:
 824   void printImpl(raw_ostream &OS, unsigned indent) const override;
 825   bool isEqualImpl(const Matcher *M) const override {
 826     return cast<EmitIntegerMatcher>(M)->Val == Val &&
 827            cast<EmitIntegerMatcher>(M)->VT == VT;
 828   }
 829 };
 830
 831 /// EmitStringIntegerMatcher - A target constant whose value is represented
 832 /// by a string.
 833 class EmitStringIntegerMatcher : public Matcher {
 834   std::string Val;
 835   MVT::SimpleValueType VT;
 836 public:
 837   EmitStringIntegerMatcher(const std::string &val, MVT::SimpleValueType vt)
 838     : Matcher(EmitStringInteger), Val(val), VT(vt) {}
 839
 840   const std::string &getValue() const { return Val; }
 841   MVT::SimpleValueType getVT() const { return VT; }
 842
 843   static bool classof(const Matcher *N) {
 844     return N->getKind() == EmitStringInteger;
 845   }
 846
 847 private:
 848   void printImpl(raw_ostream &OS, unsigned indent) const override;
 849   bool isEqualImpl(const Matcher *M) const override {
 850     return cast<EmitStringIntegerMatcher>(M)->Val == Val &&
 851            cast<EmitStringIntegerMatcher>(M)->VT == VT;
 852   }
 853 };
 854
 855 /// EmitRegisterMatcher - This creates a new TargetConstant.
 856 class EmitRegisterMatcher : public Matcher {
 857   /// Reg - The def for the register that we're emitting.  If this is null, then
 858   /// this is a reference to zero_reg.
 859   const CodeGenRegister *Reg;
 860   MVT::SimpleValueType VT;
 861 public:
 862   EmitRegisterMatcher(const CodeGenRegister *reg, MVT::SimpleValueType vt)
 863     : Matcher(EmitRegister), Reg(reg), VT(vt) {}
 864
 865   const CodeGenRegister *getReg() const { return Reg; }
 866   MVT::SimpleValueType getVT() const { return VT; }
 867
 868   static bool classof(const Matcher *N) {
 869     return N->getKind() == EmitRegister;
 870   }
 871
 872 private:
 873   void printImpl(raw_ostream &OS, unsigned indent) const override;
 874   bool isEqualImpl(const Matcher *M) const override {
 875     return cast<EmitRegisterMatcher>(M)->Reg == Reg &&
 876            cast<EmitRegisterMatcher>(M)->VT == VT;
 877   }
 878 };
 879
 880 /// EmitConvertToTargetMatcher - Emit an operation that reads a specified
 881 /// recorded node and converts it from being a ISD::Constant to
 882 /// ISD::TargetConstant, likewise for ConstantFP.
 883 class EmitConvertToTargetMatcher : public Matcher {
 884   unsigned Slot;
 885 public:
 886   EmitConvertToTargetMatcher(unsigned slot)
 887     : Matcher(EmitConvertToTarget), Slot(slot) {}
 888
 889   unsigned getSlot() const { return Slot; }
 890
 891   static bool classof(const Matcher *N) {
 892     return N->getKind() == EmitConvertToTarget;
 893   }
 894
 895 private:
 896   void printImpl(raw_ostream &OS, unsigned indent) const override;
 897   bool isEqualImpl(const Matcher *M) const override {
 898     return cast<EmitConvertToTargetMatcher>(M)->Slot == Slot;
 899   }
 900 };
 901
 902 /// EmitMergeInputChainsMatcher - Emit a node that merges a list of input
 903 /// chains together with a token factor.  The list of nodes are the nodes in the
 904 /// matched pattern that have chain input/outputs.  This node adds all input
 905 /// chains of these nodes if they are not themselves a node in the pattern.
 906 class EmitMergeInputChainsMatcher : public Matcher {
 907   SmallVector<unsigned, 3> ChainNodes;
 908 public:
 909   EmitMergeInputChainsMatcher(ArrayRef<unsigned> nodes)
 910     : Matcher(EmitMergeInputChains), ChainNodes(nodes.begin(), nodes.end()) {}
 911
 912   unsigned getNumNodes() const { return ChainNodes.size(); }
 913
 914   unsigned getNode(unsigned i) const {
 915     assert(i < ChainNodes.size());
 916     return ChainNodes[i];
 917   }
 918
 919   static bool classof(const Matcher *N) {
 920     return N->getKind() == EmitMergeInputChains;
 921   }
 922
 923 private:
 924   void printImpl(raw_ostream &OS, unsigned indent) const override;
 925   bool isEqualImpl(const Matcher *M) const override {
 926     return cast<EmitMergeInputChainsMatcher>(M)->ChainNodes == ChainNodes;
 927   }
 928 };
 929
 930 /// EmitCopyToRegMatcher - Emit a CopyToReg node from a value to a physreg,
 931 /// pushing the chain and glue results.
 932 ///
 933 class EmitCopyToRegMatcher : public Matcher {
 934   unsigned SrcSlot; // Value to copy into the physreg.
 935   const CodeGenRegister *DestPhysReg;
 936
 937 public:
 938   EmitCopyToRegMatcher(unsigned srcSlot,
 939                        const CodeGenRegister *destPhysReg)
 940     : Matcher(EmitCopyToReg), SrcSlot(srcSlot), DestPhysReg(destPhysReg) {}
 941
 942   unsigned getSrcSlot() const { return SrcSlot; }
 943   const CodeGenRegister *getDestPhysReg() const { return DestPhysReg; }
 944
 945   static bool classof(const Matcher *N) {
 946     return N->getKind() == EmitCopyToReg;
 947   }
 948
 949 private:
 950   void printImpl(raw_ostream &OS, unsigned indent) const override;
 951   bool isEqualImpl(const Matcher *M) const override {
 952     return cast<EmitCopyToRegMatcher>(M)->SrcSlot == SrcSlot &&
 953            cast<EmitCopyToRegMatcher>(M)->DestPhysReg == DestPhysReg;
 954   }
 955 };
 956
 957
 958
 959 /// EmitNodeXFormMatcher - Emit an operation that runs an SDNodeXForm on a
 960 /// recorded node and records the result.
 961 class EmitNodeXFormMatcher : public Matcher {
 962   unsigned Slot;
 963   Record *NodeXForm;
 964 public:
 965   EmitNodeXFormMatcher(unsigned slot, Record *nodeXForm)
 966     : Matcher(EmitNodeXForm), Slot(slot), NodeXForm(nodeXForm) {}
 967
 968   unsigned getSlot() const { return Slot; }
 969   Record *getNodeXForm() const { return NodeXForm; }
 970
 971   static bool classof(const Matcher *N) {
 972     return N->getKind() == EmitNodeXForm;
 973   }
 974
 975 private:
 976   void printImpl(raw_ostream &OS, unsigned indent) const override;
 977   bool isEqualImpl(const Matcher *M) const override {
 978     return cast<EmitNodeXFormMatcher>(M)->Slot == Slot &&
 979            cast<EmitNodeXFormMatcher>(M)->NodeXForm == NodeXForm;
 980   }
 981 };
 982
 983 /// EmitNodeMatcherCommon - Common class shared between EmitNode and
 984 /// MorphNodeTo.
 985 class EmitNodeMatcherCommon : public Matcher {
 986   std::string OpcodeName;
 987   const SmallVector<MVT::SimpleValueType, 3> VTs;
 988   const SmallVector<unsigned, 6> Operands;
 989   bool HasChain, HasInGlue, HasOutGlue, HasMemRefs;
 990
 991   /// NumFixedArityOperands - If this is a fixed arity node, this is set to -1.
 992   /// If this is a varidic node, this is set to the number of fixed arity
 993   /// operands in the root of the pattern.  The rest are appended to this node.
 994   int NumFixedArityOperands;
 995 public:
 996   EmitNodeMatcherCommon(const std::string &opcodeName,
 997                         ArrayRef<MVT::SimpleValueType> vts,
 998                         ArrayRef<unsigned> operands,
 999                         bool hasChain, bool hasInGlue, bool hasOutGlue,
1000                         bool hasmemrefs,
1001                         int numfixedarityoperands, bool isMorphNodeTo)
1002     : Matcher(isMorphNodeTo ? MorphNodeTo : EmitNode), OpcodeName(opcodeName),
1003       VTs(vts.begin(), vts.end()), Operands(operands.begin(), operands.end()),
1004       HasChain(hasChain), HasInGlue(hasInGlue), HasOutGlue(hasOutGlue),
1005       HasMemRefs(hasmemrefs), NumFixedArityOperands(numfixedarityoperands) {}
1006
1007   const std::string &getOpcodeName() const { return OpcodeName; }
1008
1009   unsigned getNumVTs() const { return VTs.size(); }
1010   MVT::SimpleValueType getVT(unsigned i) const {
1011     assert(i < VTs.size());
1012     return VTs[i];
1013   }
1014
1015   unsigned getNumOperands() const { return Operands.size(); }
1016   unsigned getOperand(unsigned i) const {
1017     assert(i < Operands.size());
1018     return Operands[i];
1019   }
1020
1021   const SmallVectorImpl<MVT::SimpleValueType> &getVTList() const { return VTs; }
1022   const SmallVectorImpl<unsigned> &getOperandList() const { return Operands; }
1023
1024
1025   bool hasChain() const { return HasChain; }
1026   bool hasInFlag() const { return HasInGlue; }
1027   bool hasOutFlag() const { return HasOutGlue; }
1028   bool hasMemRefs() const { return HasMemRefs; }
1029   int getNumFixedArityOperands() const { return NumFixedArityOperands; }
1030
1031   static bool classof(const Matcher *N) {
1032     return N->getKind() == EmitNode || N->getKind() == MorphNodeTo;
1033   }
1034
1035 private:
1036   void printImpl(raw_ostream &OS, unsigned indent) const override;
1037   bool isEqualImpl(const Matcher *M) const override;
1038 };
1039
1040 /// EmitNodeMatcher - This signals a successful match and generates a node.
1041 class EmitNodeMatcher : public EmitNodeMatcherCommon {
1042   void anchor() override;
1043   unsigned FirstResultSlot;
1044 public:
1045   EmitNodeMatcher(const std::string &opcodeName,
1046                   ArrayRef<MVT::SimpleValueType> vts,
1047                   ArrayRef<unsigned> operands,
1048                   bool hasChain, bool hasInFlag, bool hasOutFlag,
1049                   bool hasmemrefs,
1050                   int numfixedarityoperands, unsigned firstresultslot)
1051   : EmitNodeMatcherCommon(opcodeName, vts, operands, hasChain,
1052                           hasInFlag, hasOutFlag, hasmemrefs,
1053                           numfixedarityoperands, false),
1054     FirstResultSlot(firstresultslot) {}
1055
1056   unsigned getFirstResultSlot() const { return FirstResultSlot; }
1057
1058   static bool classof(const Matcher *N) {
1059     return N->getKind() == EmitNode;
1060   }
1061
1062 };
1063
1064 class MorphNodeToMatcher : public EmitNodeMatcherCommon {
1065   void anchor() override;
1066   const PatternToMatch &Pattern;
1067 public:
1068   MorphNodeToMatcher(const std::string &opcodeName,
1069                      ArrayRef<MVT::SimpleValueType> vts,
1070                      ArrayRef<unsigned> operands,
1071                      bool hasChain, bool hasInFlag, bool hasOutFlag,
1072                      bool hasmemrefs,
1073                      int numfixedarityoperands, const PatternToMatch &pattern)
1074     : EmitNodeMatcherCommon(opcodeName, vts, operands, hasChain,
1075                             hasInFlag, hasOutFlag, hasmemrefs,
1076                             numfixedarityoperands, true),
1077       Pattern(pattern) {
1078   }
1079
1080   const PatternToMatch &getPattern() const { return Pattern; }
1081
1082   static bool classof(const Matcher *N) {
1083     return N->getKind() == MorphNodeTo;
1084   }
1085 };
1086
1087 /// CompleteMatchMatcher - Complete a match by replacing the results of the
1088 /// pattern with the newly generated nodes.  This also prints a comment
1089 /// indicating the source and dest patterns.
1090 class CompleteMatchMatcher : public Matcher {
1091   SmallVector<unsigned, 2> Results;
1092   const PatternToMatch &Pattern;
1093 public:
1094   CompleteMatchMatcher(ArrayRef<unsigned> results,
1095                        const PatternToMatch &pattern)
1096   : Matcher(CompleteMatch), Results(results.begin(), results.end()),
1097     Pattern(pattern) {}
1098
1099   unsigned getNumResults() const { return Results.size(); }
1100   unsigned getResult(unsigned R) const { return Results[R]; }
1101   const PatternToMatch &getPattern() const { return Pattern; }
1102
1103   static bool classof(const Matcher *N) {
1104     return N->getKind() == CompleteMatch;
1105   }
1106
1107 private:
1108   void printImpl(raw_ostream &OS, unsigned indent) const override;
1109   bool isEqualImpl(const Matcher *M) const override {
1110     return cast<CompleteMatchMatcher>(M)->Results == Results &&
1111           &cast<CompleteMatchMatcher>(M)->Pattern == &Pattern;
1112   }
1113 };
1114
1115 } // end namespace llvm
1116
1117 #endif