llvm.org GIT mirror llvm / release_35 utils / TableGen / DAGISelMatcher.h
release_35

Tree @release_35 (Download .tar.gz)

DAGISelMatcher.h @release_35raw · history · blame

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
//===- DAGISelMatcher.h - Representation of DAG pattern matcher -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef TBLGEN_DAGISELMATCHER_H
#define TBLGEN_DAGISELMATCHER_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/Support/Casting.h"

namespace llvm {
  struct CodeGenRegister;
  class CodeGenDAGPatterns;
  class Matcher;
  class PatternToMatch;
  class raw_ostream;
  class ComplexPattern;
  class Record;
  class SDNodeInfo;
  class TreePredicateFn;
  class TreePattern;

Matcher *ConvertPatternToMatcher(const PatternToMatch &Pattern,unsigned Variant,
                                 const CodeGenDAGPatterns &CGP);
Matcher *OptimizeMatcher(Matcher *Matcher, const CodeGenDAGPatterns &CGP);
void EmitMatcherTable(const Matcher *Matcher, const CodeGenDAGPatterns &CGP,
                      raw_ostream &OS);


/// Matcher - Base class for all the DAG ISel Matcher representation
/// nodes.
class Matcher {
  // The next matcher node that is executed after this one.  Null if this is the
  // last stage of a match.
  std::unique_ptr<Matcher> Next;
  virtual void anchor();
public:
  enum KindTy {
    // Matcher state manipulation.
    Scope,                // Push a checking scope.
    RecordNode,           // Record the current node.
    RecordChild,          // Record a child of the current node.
    RecordMemRef,         // Record the memref in the current node.
    CaptureGlueInput,     // If the current node has an input glue, save it.
    MoveChild,            // Move current node to specified child.
    MoveParent,           // Move current node to parent.

    // Predicate checking.
    CheckSame,            // Fail if not same as prev match.
    CheckChildSame,       // Fail if child not same as prev match.
    CheckPatternPredicate,
    CheckPredicate,       // Fail if node predicate fails.
    CheckOpcode,          // Fail if not opcode.
    SwitchOpcode,         // Dispatch based on opcode.
    CheckType,            // Fail if not correct type.
    SwitchType,           // Dispatch based on type.
    CheckChildType,       // Fail if child has wrong type.
    CheckInteger,         // Fail if wrong val.
    CheckChildInteger,    // Fail if child is wrong val.
    CheckCondCode,        // Fail if not condcode.
    CheckValueType,
    CheckComplexPat,
    CheckAndImm,
    CheckOrImm,
    CheckFoldableChainNode,

    // Node creation/emisssion.
    EmitInteger,          // Create a TargetConstant
    EmitStringInteger,    // Create a TargetConstant from a string.
    EmitRegister,         // Create a register.
    EmitConvertToTarget,  // Convert a imm/fpimm to target imm/fpimm
    EmitMergeInputChains, // Merge together a chains for an input.
    EmitCopyToReg,        // Emit a copytoreg into a physreg.
    EmitNode,             // Create a DAG node
    EmitNodeXForm,        // Run a SDNodeXForm
    MarkGlueResults,      // Indicate which interior nodes have glue results.
    CompleteMatch,        // Finish a match and update the results.
    MorphNodeTo           // Build a node, finish a match and update results.
  };
  const KindTy Kind;

protected:
  Matcher(KindTy K) : Kind(K) {}
public:
  virtual ~Matcher() {}

  KindTy getKind() const { return Kind; }

  Matcher *getNext() { return Next.get(); }
  const Matcher *getNext() const { return Next.get(); }
  void setNext(Matcher *C) { Next.reset(C); }
  Matcher *takeNext() { return Next.release(); }

  std::unique_ptr<Matcher> &getNextPtr() { return Next; }

  bool isEqual(const Matcher *M) const {
    if (getKind() != M->getKind()) return false;
    return isEqualImpl(M);
  }

  unsigned getHash() const {
    // Clear the high bit so we don't conflict with tombstones etc.
    return ((getHashImpl() << 4) ^ getKind()) & (~0U>>1);
  }

  /// isSafeToReorderWithPatternPredicate - Return true if it is safe to sink a
  /// PatternPredicate node past this one.
  virtual bool isSafeToReorderWithPatternPredicate() const {
    return false;
  }

  /// isSimplePredicateNode - Return true if this is a simple predicate that
  /// operates on the node or its children without potential side effects or a
  /// change of the current node.
  bool isSimplePredicateNode() const {
    switch (getKind()) {
    default: return false;
    case CheckSame:
    case CheckChildSame:
    case CheckPatternPredicate:
    case CheckPredicate:
    case CheckOpcode:
    case CheckType:
    case CheckChildType:
    case CheckInteger:
    case CheckChildInteger:
    case CheckCondCode:
    case CheckValueType:
    case CheckAndImm:
    case CheckOrImm:
    case CheckFoldableChainNode:
      return true;
    }
  }

  /// isSimplePredicateOrRecordNode - Return true if this is a record node or
  /// a simple predicate.
  bool isSimplePredicateOrRecordNode() const {
    return isSimplePredicateNode() ||
           getKind() == RecordNode || getKind() == RecordChild;
  }

  /// unlinkNode - Unlink the specified node from this chain.  If Other == this,
  /// we unlink the next pointer and return it.  Otherwise we unlink Other from
  /// the list and return this.
  Matcher *unlinkNode(Matcher *Other);

  /// canMoveBefore - Return true if this matcher is the same as Other, or if
  /// we can move this matcher past all of the nodes in-between Other and this
  /// node.  Other must be equal to or before this.
  bool canMoveBefore(const Matcher *Other) const;

  /// canMoveBeforeNode - Return true if it is safe to move the current matcher
  /// across the specified one.
  bool canMoveBeforeNode(const Matcher *Other) const;

  /// isContradictory - Return true of these two matchers could never match on
  /// the same node.
  bool isContradictory(const Matcher *Other) const {
    // Since this predicate is reflexive, we canonicalize the ordering so that
    // we always match a node against nodes with kinds that are greater or equal
    // to them.  For example, we'll pass in a CheckType node as an argument to
    // the CheckOpcode method, not the other way around.
    if (getKind() < Other->getKind())
      return isContradictoryImpl(Other);
    return Other->isContradictoryImpl(this);
  }

  void print(raw_ostream &OS, unsigned indent = 0) const;
  void printOne(raw_ostream &OS) const;
  void dump() const;
protected:
  virtual void printImpl(raw_ostream &OS, unsigned indent) const = 0;
  virtual bool isEqualImpl(const Matcher *M) const = 0;
  virtual unsigned getHashImpl() const = 0;
  virtual bool isContradictoryImpl(const Matcher *M) const { return false; }
};

/// ScopeMatcher - This attempts to match each of its children to find the first
/// one that successfully matches.  If one child fails, it tries the next child.
/// If none of the children match then this check fails.  It never has a 'next'.
class ScopeMatcher : public Matcher {
  SmallVector<Matcher*, 4> Children;
public:
  ScopeMatcher(ArrayRef<Matcher *> children)
    : Matcher(Scope), Children(children.begin(), children.end()) {
  }
  virtual ~ScopeMatcher();

  unsigned getNumChildren() const { return Children.size(); }

  Matcher *getChild(unsigned i) { return Children[i]; }
  const Matcher *getChild(unsigned i) const { return Children[i]; }

  void resetChild(unsigned i, Matcher *N) {
    delete Children[i];
    Children[i] = N;
  }

  Matcher *takeChild(unsigned i) {
    Matcher *Res = Children[i];
    Children[i] = nullptr;
    return Res;
  }

  void setNumChildren(unsigned NC) {
    if (NC < Children.size()) {
      // delete any children we're about to lose pointers to.
      for (unsigned i = NC, e = Children.size(); i != e; ++i)
        delete Children[i];
    }
    Children.resize(NC);
  }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == Scope;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return false; }
  unsigned getHashImpl() const override { return 12312; }
};

/// RecordMatcher - Save the current node in the operand list.
class RecordMatcher : public Matcher {
  /// WhatFor - This is a string indicating why we're recording this.  This
  /// should only be used for comment generation not anything semantic.
  std::string WhatFor;

  /// ResultNo - The slot number in the RecordedNodes vector that this will be,
  /// just printed as a comment.
  unsigned ResultNo;
public:
  RecordMatcher(const std::string &whatfor, unsigned resultNo)
    : Matcher(RecordNode), WhatFor(whatfor), ResultNo(resultNo) {}

  const std::string &getWhatFor() const { return WhatFor; }
  unsigned getResultNo() const { return ResultNo; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == RecordNode;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }
private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return true; }
  unsigned getHashImpl() const override { return 0; }
};

/// RecordChildMatcher - Save a numbered child of the current node, or fail
/// the match if it doesn't exist.  This is logically equivalent to:
///    MoveChild N + RecordNode + MoveParent.
class RecordChildMatcher : public Matcher {
  unsigned ChildNo;

  /// WhatFor - This is a string indicating why we're recording this.  This
  /// should only be used for comment generation not anything semantic.
  std::string WhatFor;

  /// ResultNo - The slot number in the RecordedNodes vector that this will be,
  /// just printed as a comment.
  unsigned ResultNo;
public:
  RecordChildMatcher(unsigned childno, const std::string &whatfor,
                     unsigned resultNo)
  : Matcher(RecordChild), ChildNo(childno), WhatFor(whatfor),
    ResultNo(resultNo) {}

  unsigned getChildNo() const { return ChildNo; }
  const std::string &getWhatFor() const { return WhatFor; }
  unsigned getResultNo() const { return ResultNo; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == RecordChild;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<RecordChildMatcher>(M)->getChildNo() == getChildNo();
  }
  unsigned getHashImpl() const override { return getChildNo(); }
};

/// RecordMemRefMatcher - Save the current node's memref.
class RecordMemRefMatcher : public Matcher {
public:
  RecordMemRefMatcher() : Matcher(RecordMemRef) {}

  static inline bool classof(const Matcher *N) {
    return N->getKind() == RecordMemRef;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return true; }
  unsigned getHashImpl() const override { return 0; }
};


/// CaptureGlueInputMatcher - If the current record has a glue input, record
/// it so that it is used as an input to the generated code.
class CaptureGlueInputMatcher : public Matcher {
public:
  CaptureGlueInputMatcher() : Matcher(CaptureGlueInput) {}

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CaptureGlueInput;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return true; }
  unsigned getHashImpl() const override { return 0; }
};

/// MoveChildMatcher - This tells the interpreter to move into the
/// specified child node.
class MoveChildMatcher : public Matcher {
  unsigned ChildNo;
public:
  MoveChildMatcher(unsigned childNo) : Matcher(MoveChild), ChildNo(childNo) {}

  unsigned getChildNo() const { return ChildNo; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == MoveChild;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<MoveChildMatcher>(M)->getChildNo() == getChildNo();
  }
  unsigned getHashImpl() const override { return getChildNo(); }
};

/// MoveParentMatcher - This tells the interpreter to move to the parent
/// of the current node.
class MoveParentMatcher : public Matcher {
public:
  MoveParentMatcher() : Matcher(MoveParent) {}

  static inline bool classof(const Matcher *N) {
    return N->getKind() == MoveParent;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return true; }
  unsigned getHashImpl() const override { return 0; }
};

/// CheckSameMatcher - This checks to see if this node is exactly the same
/// node as the specified match that was recorded with 'Record'.  This is used
/// when patterns have the same name in them, like '(mul GPR:$in, GPR:$in)'.
class CheckSameMatcher : public Matcher {
  unsigned MatchNumber;
public:
  CheckSameMatcher(unsigned matchnumber)
    : Matcher(CheckSame), MatchNumber(matchnumber) {}

  unsigned getMatchNumber() const { return MatchNumber; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckSame;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckSameMatcher>(M)->getMatchNumber() == getMatchNumber();
  }
  unsigned getHashImpl() const override { return getMatchNumber(); }
};

/// CheckChildSameMatcher - This checks to see if child node is exactly the same
/// node as the specified match that was recorded with 'Record'.  This is used
/// when patterns have the same name in them, like '(mul GPR:$in, GPR:$in)'.
class CheckChildSameMatcher : public Matcher {
  unsigned ChildNo;
  unsigned MatchNumber;
public:
  CheckChildSameMatcher(unsigned childno, unsigned matchnumber)
    : Matcher(CheckChildSame), ChildNo(childno), MatchNumber(matchnumber) {}

  unsigned getChildNo() const { return ChildNo; }
  unsigned getMatchNumber() const { return MatchNumber; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckChildSame;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckChildSameMatcher>(M)->ChildNo == ChildNo &&
           cast<CheckChildSameMatcher>(M)->MatchNumber == MatchNumber;
  }
  unsigned getHashImpl() const override { return (MatchNumber << 2) | ChildNo; }
};

/// CheckPatternPredicateMatcher - This checks the target-specific predicate
/// to see if the entire pattern is capable of matching.  This predicate does
/// not take a node as input.  This is used for subtarget feature checks etc.
class CheckPatternPredicateMatcher : public Matcher {
  std::string Predicate;
public:
  CheckPatternPredicateMatcher(StringRef predicate)
    : Matcher(CheckPatternPredicate), Predicate(predicate) {}

  StringRef getPredicate() const { return Predicate; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckPatternPredicate;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckPatternPredicateMatcher>(M)->getPredicate() == Predicate;
  }
  unsigned getHashImpl() const override;
};

/// CheckPredicateMatcher - This checks the target-specific predicate to
/// see if the node is acceptable.
class CheckPredicateMatcher : public Matcher {
  TreePattern *Pred;
public:
  CheckPredicateMatcher(const TreePredicateFn &pred);

  TreePredicateFn getPredicate() const;

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckPredicate;
  }

  // TODO: Ok?
  //virtual bool isSafeToReorderWithPatternPredicate() const { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckPredicateMatcher>(M)->Pred == Pred;
  }
  unsigned getHashImpl() const override;
};


/// CheckOpcodeMatcher - This checks to see if the current node has the
/// specified opcode, if not it fails to match.
class CheckOpcodeMatcher : public Matcher {
  const SDNodeInfo &Opcode;
public:
  CheckOpcodeMatcher(const SDNodeInfo &opcode)
    : Matcher(CheckOpcode), Opcode(opcode) {}

  const SDNodeInfo &getOpcode() const { return Opcode; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckOpcode;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override;
  unsigned getHashImpl() const override;
  bool isContradictoryImpl(const Matcher *M) const override;
};

/// SwitchOpcodeMatcher - Switch based on the current node's opcode, dispatching
/// to one matcher per opcode.  If the opcode doesn't match any of the cases,
/// then the match fails.  This is semantically equivalent to a Scope node where
/// every child does a CheckOpcode, but is much faster.
class SwitchOpcodeMatcher : public Matcher {
  SmallVector<std::pair<const SDNodeInfo*, Matcher*>, 8> Cases;
public:
  SwitchOpcodeMatcher(ArrayRef<std::pair<const SDNodeInfo*, Matcher*> > cases)
    : Matcher(SwitchOpcode), Cases(cases.begin(), cases.end()) {}
  virtual ~SwitchOpcodeMatcher();

  static inline bool classof(const Matcher *N) {
    return N->getKind() == SwitchOpcode;
  }

  unsigned getNumCases() const { return Cases.size(); }

  const SDNodeInfo &getCaseOpcode(unsigned i) const { return *Cases[i].first; }
  Matcher *getCaseMatcher(unsigned i) { return Cases[i].second; }
  const Matcher *getCaseMatcher(unsigned i) const { return Cases[i].second; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return false; }
  unsigned getHashImpl() const override { return 4123; }
};

/// CheckTypeMatcher - This checks to see if the current node has the
/// specified type at the specified result, if not it fails to match.
class CheckTypeMatcher : public Matcher {
  MVT::SimpleValueType Type;
  unsigned ResNo;
public:
  CheckTypeMatcher(MVT::SimpleValueType type, unsigned resno)
    : Matcher(CheckType), Type(type), ResNo(resno) {}

  MVT::SimpleValueType getType() const { return Type; }
  unsigned getResNo() const { return ResNo; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckType;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckTypeMatcher>(M)->Type == Type;
  }
  unsigned getHashImpl() const override { return Type; }
  bool isContradictoryImpl(const Matcher *M) const override;
};

/// SwitchTypeMatcher - Switch based on the current node's type, dispatching
/// to one matcher per case.  If the type doesn't match any of the cases,
/// then the match fails.  This is semantically equivalent to a Scope node where
/// every child does a CheckType, but is much faster.
class SwitchTypeMatcher : public Matcher {
  SmallVector<std::pair<MVT::SimpleValueType, Matcher*>, 8> Cases;
public:
  SwitchTypeMatcher(ArrayRef<std::pair<MVT::SimpleValueType, Matcher*> > cases)
  : Matcher(SwitchType), Cases(cases.begin(), cases.end()) {}
  virtual ~SwitchTypeMatcher();

  static inline bool classof(const Matcher *N) {
    return N->getKind() == SwitchType;
  }

  unsigned getNumCases() const { return Cases.size(); }

  MVT::SimpleValueType getCaseType(unsigned i) const { return Cases[i].first; }
  Matcher *getCaseMatcher(unsigned i) { return Cases[i].second; }
  const Matcher *getCaseMatcher(unsigned i) const { return Cases[i].second; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return false; }
  unsigned getHashImpl() const override { return 4123; }
};


/// CheckChildTypeMatcher - This checks to see if a child node has the
/// specified type, if not it fails to match.
class CheckChildTypeMatcher : public Matcher {
  unsigned ChildNo;
  MVT::SimpleValueType Type;
public:
  CheckChildTypeMatcher(unsigned childno, MVT::SimpleValueType type)
    : Matcher(CheckChildType), ChildNo(childno), Type(type) {}

  unsigned getChildNo() const { return ChildNo; }
  MVT::SimpleValueType getType() const { return Type; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckChildType;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckChildTypeMatcher>(M)->ChildNo == ChildNo &&
           cast<CheckChildTypeMatcher>(M)->Type == Type;
  }
  unsigned getHashImpl() const override { return (Type << 3) | ChildNo; }
  bool isContradictoryImpl(const Matcher *M) const override;
};


/// CheckIntegerMatcher - This checks to see if the current node is a
/// ConstantSDNode with the specified integer value, if not it fails to match.
class CheckIntegerMatcher : public Matcher {
  int64_t Value;
public:
  CheckIntegerMatcher(int64_t value)
    : Matcher(CheckInteger), Value(value) {}

  int64_t getValue() const { return Value; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckInteger;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckIntegerMatcher>(M)->Value == Value;
  }
  unsigned getHashImpl() const override { return Value; }
  bool isContradictoryImpl(const Matcher *M) const override;
};

/// CheckChildIntegerMatcher - This checks to see if the child node is a
/// ConstantSDNode with a specified integer value, if not it fails to match.
class CheckChildIntegerMatcher : public Matcher {
  unsigned ChildNo;
  int64_t Value;
public:
  CheckChildIntegerMatcher(unsigned childno, int64_t value)
    : Matcher(CheckChildInteger), ChildNo(childno), Value(value) {}

  unsigned getChildNo() const { return ChildNo; }
  int64_t getValue() const { return Value; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckChildInteger;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckChildIntegerMatcher>(M)->ChildNo == ChildNo &&
           cast<CheckChildIntegerMatcher>(M)->Value == Value;
  }
  unsigned getHashImpl() const override { return (Value << 3) | ChildNo; }
  bool isContradictoryImpl(const Matcher *M) const override;
};

/// CheckCondCodeMatcher - This checks to see if the current node is a
/// CondCodeSDNode with the specified condition, if not it fails to match.
class CheckCondCodeMatcher : public Matcher {
  StringRef CondCodeName;
public:
  CheckCondCodeMatcher(StringRef condcodename)
    : Matcher(CheckCondCode), CondCodeName(condcodename) {}

  StringRef getCondCodeName() const { return CondCodeName; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckCondCode;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckCondCodeMatcher>(M)->CondCodeName == CondCodeName;
  }
  unsigned getHashImpl() const override;
};

/// CheckValueTypeMatcher - This checks to see if the current node is a
/// VTSDNode with the specified type, if not it fails to match.
class CheckValueTypeMatcher : public Matcher {
  StringRef TypeName;
public:
  CheckValueTypeMatcher(StringRef type_name)
    : Matcher(CheckValueType), TypeName(type_name) {}

  StringRef getTypeName() const { return TypeName; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckValueType;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckValueTypeMatcher>(M)->TypeName == TypeName;
  }
  unsigned getHashImpl() const override;
  bool isContradictoryImpl(const Matcher *M) const override;
};



/// CheckComplexPatMatcher - This node runs the specified ComplexPattern on
/// the current node.
class CheckComplexPatMatcher : public Matcher {
  const ComplexPattern &Pattern;

  /// MatchNumber - This is the recorded nodes slot that contains the node we
  /// want to match against.
  unsigned MatchNumber;

  /// Name - The name of the node we're matching, for comment emission.
  std::string Name;

  /// FirstResult - This is the first slot in the RecordedNodes list that the
  /// result of the match populates.
  unsigned FirstResult;
public:
  CheckComplexPatMatcher(const ComplexPattern &pattern, unsigned matchnumber,
                         const std::string &name, unsigned firstresult)
    : Matcher(CheckComplexPat), Pattern(pattern), MatchNumber(matchnumber),
      Name(name), FirstResult(firstresult) {}

  const ComplexPattern &getPattern() const { return Pattern; }
  unsigned getMatchNumber() const { return MatchNumber; }

  const std::string getName() const { return Name; }
  unsigned getFirstResult() const { return FirstResult; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckComplexPat;
  }

  // Not safe to move a pattern predicate past a complex pattern.
  bool isSafeToReorderWithPatternPredicate() const override { return false; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return &cast<CheckComplexPatMatcher>(M)->Pattern == &Pattern &&
           cast<CheckComplexPatMatcher>(M)->MatchNumber == MatchNumber;
  }
  unsigned getHashImpl() const override {
    return (unsigned)(intptr_t)&Pattern ^ MatchNumber;
  }
};

/// CheckAndImmMatcher - This checks to see if the current node is an 'and'
/// with something equivalent to the specified immediate.
class CheckAndImmMatcher : public Matcher {
  int64_t Value;
public:
  CheckAndImmMatcher(int64_t value)
    : Matcher(CheckAndImm), Value(value) {}

  int64_t getValue() const { return Value; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckAndImm;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckAndImmMatcher>(M)->Value == Value;
  }
  unsigned getHashImpl() const override { return Value; }
};

/// CheckOrImmMatcher - This checks to see if the current node is an 'and'
/// with something equivalent to the specified immediate.
class CheckOrImmMatcher : public Matcher {
  int64_t Value;
public:
  CheckOrImmMatcher(int64_t value)
    : Matcher(CheckOrImm), Value(value) {}

  int64_t getValue() const { return Value; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckOrImm;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CheckOrImmMatcher>(M)->Value == Value;
  }
  unsigned getHashImpl() const override { return Value; }
};

/// CheckFoldableChainNodeMatcher - This checks to see if the current node
/// (which defines a chain operand) is safe to fold into a larger pattern.
class CheckFoldableChainNodeMatcher : public Matcher {
public:
  CheckFoldableChainNodeMatcher()
    : Matcher(CheckFoldableChainNode) {}

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CheckFoldableChainNode;
  }

  bool isSafeToReorderWithPatternPredicate() const override { return true; }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override { return true; }
  unsigned getHashImpl() const override { return 0; }
};

/// EmitIntegerMatcher - This creates a new TargetConstant.
class EmitIntegerMatcher : public Matcher {
  int64_t Val;
  MVT::SimpleValueType VT;
public:
  EmitIntegerMatcher(int64_t val, MVT::SimpleValueType vt)
    : Matcher(EmitInteger), Val(val), VT(vt) {}

  int64_t getValue() const { return Val; }
  MVT::SimpleValueType getVT() const { return VT; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitInteger;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitIntegerMatcher>(M)->Val == Val &&
           cast<EmitIntegerMatcher>(M)->VT == VT;
  }
  unsigned getHashImpl() const override { return (Val << 4) | VT; }
};

/// EmitStringIntegerMatcher - A target constant whose value is represented
/// by a string.
class EmitStringIntegerMatcher : public Matcher {
  std::string Val;
  MVT::SimpleValueType VT;
public:
  EmitStringIntegerMatcher(const std::string &val, MVT::SimpleValueType vt)
    : Matcher(EmitStringInteger), Val(val), VT(vt) {}

  const std::string &getValue() const { return Val; }
  MVT::SimpleValueType getVT() const { return VT; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitStringInteger;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitStringIntegerMatcher>(M)->Val == Val &&
           cast<EmitStringIntegerMatcher>(M)->VT == VT;
  }
  unsigned getHashImpl() const override;
};

/// EmitRegisterMatcher - This creates a new TargetConstant.
class EmitRegisterMatcher : public Matcher {
  /// Reg - The def for the register that we're emitting.  If this is null, then
  /// this is a reference to zero_reg.
  const CodeGenRegister *Reg;
  MVT::SimpleValueType VT;
public:
  EmitRegisterMatcher(const CodeGenRegister *reg, MVT::SimpleValueType vt)
    : Matcher(EmitRegister), Reg(reg), VT(vt) {}

  const CodeGenRegister *getReg() const { return Reg; }
  MVT::SimpleValueType getVT() const { return VT; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitRegister;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitRegisterMatcher>(M)->Reg == Reg &&
           cast<EmitRegisterMatcher>(M)->VT == VT;
  }
  unsigned getHashImpl() const override {
    return ((unsigned)(intptr_t)Reg) << 4 | VT;
  }
};

/// EmitConvertToTargetMatcher - Emit an operation that reads a specified
/// recorded node and converts it from being a ISD::Constant to
/// ISD::TargetConstant, likewise for ConstantFP.
class EmitConvertToTargetMatcher : public Matcher {
  unsigned Slot;
public:
  EmitConvertToTargetMatcher(unsigned slot)
    : Matcher(EmitConvertToTarget), Slot(slot) {}

  unsigned getSlot() const { return Slot; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitConvertToTarget;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitConvertToTargetMatcher>(M)->Slot == Slot;
  }
  unsigned getHashImpl() const override { return Slot; }
};

/// EmitMergeInputChainsMatcher - Emit a node that merges a list of input
/// chains together with a token factor.  The list of nodes are the nodes in the
/// matched pattern that have chain input/outputs.  This node adds all input
/// chains of these nodes if they are not themselves a node in the pattern.
class EmitMergeInputChainsMatcher : public Matcher {
  SmallVector<unsigned, 3> ChainNodes;
public:
  EmitMergeInputChainsMatcher(ArrayRef<unsigned> nodes)
    : Matcher(EmitMergeInputChains), ChainNodes(nodes.begin(), nodes.end()) {}

  unsigned getNumNodes() const { return ChainNodes.size(); }

  unsigned getNode(unsigned i) const {
    assert(i < ChainNodes.size());
    return ChainNodes[i];
  }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitMergeInputChains;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitMergeInputChainsMatcher>(M)->ChainNodes == ChainNodes;
  }
  unsigned getHashImpl() const override;
};

/// EmitCopyToRegMatcher - Emit a CopyToReg node from a value to a physreg,
/// pushing the chain and glue results.
///
class EmitCopyToRegMatcher : public Matcher {
  unsigned SrcSlot; // Value to copy into the physreg.
  Record *DestPhysReg;
public:
  EmitCopyToRegMatcher(unsigned srcSlot, Record *destPhysReg)
    : Matcher(EmitCopyToReg), SrcSlot(srcSlot), DestPhysReg(destPhysReg) {}

  unsigned getSrcSlot() const { return SrcSlot; }
  Record *getDestPhysReg() const { return DestPhysReg; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitCopyToReg;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitCopyToRegMatcher>(M)->SrcSlot == SrcSlot &&
           cast<EmitCopyToRegMatcher>(M)->DestPhysReg == DestPhysReg;
  }
  unsigned getHashImpl() const override {
    return SrcSlot ^ ((unsigned)(intptr_t)DestPhysReg << 4);
  }
};



/// EmitNodeXFormMatcher - Emit an operation that runs an SDNodeXForm on a
/// recorded node and records the result.
class EmitNodeXFormMatcher : public Matcher {
  unsigned Slot;
  Record *NodeXForm;
public:
  EmitNodeXFormMatcher(unsigned slot, Record *nodeXForm)
    : Matcher(EmitNodeXForm), Slot(slot), NodeXForm(nodeXForm) {}

  unsigned getSlot() const { return Slot; }
  Record *getNodeXForm() const { return NodeXForm; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitNodeXForm;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<EmitNodeXFormMatcher>(M)->Slot == Slot &&
           cast<EmitNodeXFormMatcher>(M)->NodeXForm == NodeXForm;
  }
  unsigned getHashImpl() const override {
    return Slot ^ ((unsigned)(intptr_t)NodeXForm << 4);
  }
};

/// EmitNodeMatcherCommon - Common class shared between EmitNode and
/// MorphNodeTo.
class EmitNodeMatcherCommon : public Matcher {
  std::string OpcodeName;
  const SmallVector<MVT::SimpleValueType, 3> VTs;
  const SmallVector<unsigned, 6> Operands;
  bool HasChain, HasInGlue, HasOutGlue, HasMemRefs;

  /// NumFixedArityOperands - If this is a fixed arity node, this is set to -1.
  /// If this is a varidic node, this is set to the number of fixed arity
  /// operands in the root of the pattern.  The rest are appended to this node.
  int NumFixedArityOperands;
public:
  EmitNodeMatcherCommon(const std::string &opcodeName,
                        ArrayRef<MVT::SimpleValueType> vts,
                        ArrayRef<unsigned> operands,
                        bool hasChain, bool hasInGlue, bool hasOutGlue,
                        bool hasmemrefs,
                        int numfixedarityoperands, bool isMorphNodeTo)
    : Matcher(isMorphNodeTo ? MorphNodeTo : EmitNode), OpcodeName(opcodeName),
      VTs(vts.begin(), vts.end()), Operands(operands.begin(), operands.end()),
      HasChain(hasChain), HasInGlue(hasInGlue), HasOutGlue(hasOutGlue),
      HasMemRefs(hasmemrefs), NumFixedArityOperands(numfixedarityoperands) {}

  const std::string &getOpcodeName() const { return OpcodeName; }

  unsigned getNumVTs() const { return VTs.size(); }
  MVT::SimpleValueType getVT(unsigned i) const {
    assert(i < VTs.size());
    return VTs[i];
  }

  unsigned getNumOperands() const { return Operands.size(); }
  unsigned getOperand(unsigned i) const {
    assert(i < Operands.size());
    return Operands[i];
  }

  const SmallVectorImpl<MVT::SimpleValueType> &getVTList() const { return VTs; }
  const SmallVectorImpl<unsigned> &getOperandList() const { return Operands; }


  bool hasChain() const { return HasChain; }
  bool hasInFlag() const { return HasInGlue; }
  bool hasOutFlag() const { return HasOutGlue; }
  bool hasMemRefs() const { return HasMemRefs; }
  int getNumFixedArityOperands() const { return NumFixedArityOperands; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitNode || N->getKind() == MorphNodeTo;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override;
  unsigned getHashImpl() const override;
};

/// EmitNodeMatcher - This signals a successful match and generates a node.
class EmitNodeMatcher : public EmitNodeMatcherCommon {
  void anchor() override;
  unsigned FirstResultSlot;
public:
  EmitNodeMatcher(const std::string &opcodeName,
                  ArrayRef<MVT::SimpleValueType> vts,
                  ArrayRef<unsigned> operands,
                  bool hasChain, bool hasInFlag, bool hasOutFlag,
                  bool hasmemrefs,
                  int numfixedarityoperands, unsigned firstresultslot)
  : EmitNodeMatcherCommon(opcodeName, vts, operands, hasChain,
                          hasInFlag, hasOutFlag, hasmemrefs,
                          numfixedarityoperands, false),
    FirstResultSlot(firstresultslot) {}

  unsigned getFirstResultSlot() const { return FirstResultSlot; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == EmitNode;
  }

};

class MorphNodeToMatcher : public EmitNodeMatcherCommon {
  void anchor() override;
  const PatternToMatch &Pattern;
public:
  MorphNodeToMatcher(const std::string &opcodeName,
                     ArrayRef<MVT::SimpleValueType> vts,
                     ArrayRef<unsigned> operands,
                     bool hasChain, bool hasInFlag, bool hasOutFlag,
                     bool hasmemrefs,
                     int numfixedarityoperands, const PatternToMatch &pattern)
    : EmitNodeMatcherCommon(opcodeName, vts, operands, hasChain,
                            hasInFlag, hasOutFlag, hasmemrefs,
                            numfixedarityoperands, true),
      Pattern(pattern) {
  }

  const PatternToMatch &getPattern() const { return Pattern; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == MorphNodeTo;
  }
};

/// MarkGlueResultsMatcher - This node indicates which non-root nodes in the
/// pattern produce glue.  This allows CompleteMatchMatcher to update them
/// with the output glue of the resultant code.
class MarkGlueResultsMatcher : public Matcher {
  SmallVector<unsigned, 3> GlueResultNodes;
public:
  MarkGlueResultsMatcher(ArrayRef<unsigned> nodes)
    : Matcher(MarkGlueResults), GlueResultNodes(nodes.begin(), nodes.end()) {}

  unsigned getNumNodes() const { return GlueResultNodes.size(); }

  unsigned getNode(unsigned i) const {
    assert(i < GlueResultNodes.size());
    return GlueResultNodes[i];
  }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == MarkGlueResults;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<MarkGlueResultsMatcher>(M)->GlueResultNodes == GlueResultNodes;
  }
  unsigned getHashImpl() const override;
};

/// CompleteMatchMatcher - Complete a match by replacing the results of the
/// pattern with the newly generated nodes.  This also prints a comment
/// indicating the source and dest patterns.
class CompleteMatchMatcher : public Matcher {
  SmallVector<unsigned, 2> Results;
  const PatternToMatch &Pattern;
public:
  CompleteMatchMatcher(ArrayRef<unsigned> results,
                       const PatternToMatch &pattern)
  : Matcher(CompleteMatch), Results(results.begin(), results.end()),
    Pattern(pattern) {}

  unsigned getNumResults() const { return Results.size(); }
  unsigned getResult(unsigned R) const { return Results[R]; }
  const PatternToMatch &getPattern() const { return Pattern; }

  static inline bool classof(const Matcher *N) {
    return N->getKind() == CompleteMatch;
  }

private:
  void printImpl(raw_ostream &OS, unsigned indent) const override;
  bool isEqualImpl(const Matcher *M) const override {
    return cast<CompleteMatchMatcher>(M)->Results == Results &&
          &cast<CompleteMatchMatcher>(M)->Pattern == &Pattern;
  }
  unsigned getHashImpl() const override;
};

} // end namespace llvm

#endif