llvm.org GIT mirror llvm / 48973d7 include / llvm / IR / DiagnosticInfo.h
48973d7

Tree @48973d7 (Download .tar.gz)

DiagnosticInfo.h @48973d7raw · 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
//===- llvm/IR/DiagnosticInfo.h - Diagnostic Declaration --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the different classes involved in low level diagnostics.
//
// Diagnostics reporting is still done as part of the LLVMContext.
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_DIAGNOSTICINFO_H
#define LLVM_IR_DIAGNOSTICINFO_H

#include "llvm-c/Types.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/Support/CBindingWrapping.h"
#include "llvm/Support/YAMLTraits.h"
#include <algorithm>
#include <cstdint>
#include <functional>
#include <iterator>
#include <string>

namespace llvm {

// Forward declarations.
class DiagnosticPrinter;
class Function;
class Instruction;
class LLVMContext;
class Module;
class SMDiagnostic;

/// Defines the different supported severity of a diagnostic.
enum DiagnosticSeverity : char {
  DS_Error,
  DS_Warning,
  DS_Remark,
  // A note attaches additional information to one of the previous diagnostic
  // types.
  DS_Note
};

/// Defines the different supported kind of a diagnostic.
/// This enum should be extended with a new ID for each added concrete subclass.
enum DiagnosticKind {
  DK_InlineAsm,
  DK_ResourceLimit,
  DK_StackSize,
  DK_Linker,
  DK_DebugMetadataVersion,
  DK_DebugMetadataInvalid,
  DK_ISelFallback,
  DK_SampleProfile,
  DK_OptimizationRemark,
  DK_OptimizationRemarkMissed,
  DK_OptimizationRemarkAnalysis,
  DK_OptimizationRemarkAnalysisFPCommute,
  DK_OptimizationRemarkAnalysisAliasing,
  DK_OptimizationFailure,
  DK_FirstRemark = DK_OptimizationRemark,
  DK_LastRemark = DK_OptimizationFailure,
  DK_MachineOptimizationRemark,
  DK_MachineOptimizationRemarkMissed,
  DK_MachineOptimizationRemarkAnalysis,
  DK_FirstMachineRemark = DK_MachineOptimizationRemark,
  DK_LastMachineRemark = DK_MachineOptimizationRemarkAnalysis,
  DK_MIRParser,
  DK_PGOProfile,
  DK_Unsupported,
  DK_FirstPluginKind
};

/// Get the next available kind ID for a plugin diagnostic.
/// Each time this function is called, it returns a different number.
/// Therefore, a plugin that wants to "identify" its own classes
/// with a dynamic identifier, just have to use this method to get a new ID
/// and assign it to each of its classes.
/// The returned ID will be greater than or equal to DK_FirstPluginKind.
/// Thus, the plugin identifiers will not conflict with the
/// DiagnosticKind values.
int getNextAvailablePluginDiagnosticKind();

/// This is the base abstract class for diagnostic reporting in
/// the backend.
/// The print method must be overloaded by the subclasses to print a
/// user-friendly message in the client of the backend (let us call it a
/// frontend).
class DiagnosticInfo {
private:
  /// Kind defines the kind of report this is about.
  const /* DiagnosticKind */ int Kind;
  /// Severity gives the severity of the diagnostic.
  const DiagnosticSeverity Severity;

  virtual void anchor();
public:
  DiagnosticInfo(/* DiagnosticKind */ int Kind, DiagnosticSeverity Severity)
      : Kind(Kind), Severity(Severity) {}

  virtual ~DiagnosticInfo() = default;

  /* DiagnosticKind */ int getKind() const { return Kind; }
  DiagnosticSeverity getSeverity() const { return Severity; }

  /// Print using the given \p DP a user-friendly message.
  /// This is the default message that will be printed to the user.
  /// It is used when the frontend does not directly take advantage
  /// of the information contained in fields of the subclasses.
  /// The printed message must not end with '.' nor start with a severity
  /// keyword.
  virtual void print(DiagnosticPrinter &DP) const = 0;
};

using DiagnosticHandlerFunction = std::function<void(const DiagnosticInfo &)>;

/// Diagnostic information for inline asm reporting.
/// This is basically a message and an optional location.
class DiagnosticInfoInlineAsm : public DiagnosticInfo {
private:
  /// Optional line information. 0 if not set.
  unsigned LocCookie = 0;
  /// Message to be reported.
  const Twine &MsgStr;
  /// Optional origin of the problem.
  const Instruction *Instr = nullptr;

public:
  /// \p MsgStr is the message to be reported to the frontend.
  /// This class does not copy \p MsgStr, therefore the reference must be valid
  /// for the whole life time of the Diagnostic.
  DiagnosticInfoInlineAsm(const Twine &MsgStr,
                          DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_InlineAsm, Severity), MsgStr(MsgStr) {}

  /// \p LocCookie if non-zero gives the line number for this report.
  /// \p MsgStr gives the message.
  /// This class does not copy \p MsgStr, therefore the reference must be valid
  /// for the whole life time of the Diagnostic.
  DiagnosticInfoInlineAsm(unsigned LocCookie, const Twine &MsgStr,
                          DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_InlineAsm, Severity), LocCookie(LocCookie),
        MsgStr(MsgStr) {}

  /// \p Instr gives the original instruction that triggered the diagnostic.
  /// \p MsgStr gives the message.
  /// This class does not copy \p MsgStr, therefore the reference must be valid
  /// for the whole life time of the Diagnostic.
  /// Same for \p I.
  DiagnosticInfoInlineAsm(const Instruction &I, const Twine &MsgStr,
                          DiagnosticSeverity Severity = DS_Error);

  unsigned getLocCookie() const { return LocCookie; }
  const Twine &getMsgStr() const { return MsgStr; }
  const Instruction *getInstruction() const { return Instr; }

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_InlineAsm;
  }
};

/// Diagnostic information for stack size etc. reporting.
/// This is basically a function and a size.
class DiagnosticInfoResourceLimit : public DiagnosticInfo {
private:
  /// The function that is concerned by this resource limit diagnostic.
  const Function &Fn;

  /// Description of the resource type (e.g. stack size)
  const char *ResourceName;

  /// The computed size usage
  uint64_t ResourceSize;

  // Threshould passed
  uint64_t ResourceLimit;

public:
  /// \p The function that is concerned by this stack size diagnostic.
  /// \p The computed stack size.
  DiagnosticInfoResourceLimit(const Function &Fn, const char *ResourceName,
                              uint64_t ResourceSize,
                              DiagnosticSeverity Severity = DS_Warning,
                              DiagnosticKind Kind = DK_ResourceLimit,
                              uint64_t ResourceLimit = 0)
      : DiagnosticInfo(Kind, Severity), Fn(Fn), ResourceName(ResourceName),
        ResourceSize(ResourceSize), ResourceLimit(ResourceLimit) {}

  const Function &getFunction() const { return Fn; }
  const char *getResourceName() const { return ResourceName; }
  uint64_t getResourceSize() const { return ResourceSize; }
  uint64_t getResourceLimit() const { return ResourceLimit; }

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_ResourceLimit || DI->getKind() == DK_StackSize;
  }
};

class DiagnosticInfoStackSize : public DiagnosticInfoResourceLimit {
  virtual void anchor() override;
public:
  DiagnosticInfoStackSize(const Function &Fn, uint64_t StackSize,
                          DiagnosticSeverity Severity = DS_Warning,
                          uint64_t StackLimit = 0)
      : DiagnosticInfoResourceLimit(Fn, "stack size", StackSize, Severity,
                                    DK_StackSize, StackLimit) {}

  uint64_t getStackSize() const { return getResourceSize(); }
  uint64_t getStackLimit() const { return getResourceLimit(); }

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_StackSize;
  }
};

/// Diagnostic information for debug metadata version reporting.
/// This is basically a module and a version.
class DiagnosticInfoDebugMetadataVersion : public DiagnosticInfo {
private:
  /// The module that is concerned by this debug metadata version diagnostic.
  const Module &M;
  /// The actual metadata version.
  unsigned MetadataVersion;

public:
  /// \p The module that is concerned by this debug metadata version diagnostic.
  /// \p The actual metadata version.
  DiagnosticInfoDebugMetadataVersion(const Module &M, unsigned MetadataVersion,
                                     DiagnosticSeverity Severity = DS_Warning)
      : DiagnosticInfo(DK_DebugMetadataVersion, Severity), M(M),
        MetadataVersion(MetadataVersion) {}

  const Module &getModule() const { return M; }
  unsigned getMetadataVersion() const { return MetadataVersion; }

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_DebugMetadataVersion;
  }
};

/// Diagnostic information for stripping invalid debug metadata.
class DiagnosticInfoIgnoringInvalidDebugMetadata : public DiagnosticInfo {
private:
  /// The module that is concerned by this debug metadata version diagnostic.
  const Module &M;

public:
  /// \p The module that is concerned by this debug metadata version diagnostic.
  DiagnosticInfoIgnoringInvalidDebugMetadata(
      const Module &M, DiagnosticSeverity Severity = DS_Warning)
      : DiagnosticInfo(DK_DebugMetadataVersion, Severity), M(M) {}

  const Module &getModule() const { return M; }

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_DebugMetadataInvalid;
  }
};

/// Diagnostic information for the sample profiler.
class DiagnosticInfoSampleProfile : public DiagnosticInfo {
public:
  DiagnosticInfoSampleProfile(StringRef FileName, unsigned LineNum,
                              const Twine &Msg,
                              DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_SampleProfile, Severity), FileName(FileName),
        LineNum(LineNum), Msg(Msg) {}
  DiagnosticInfoSampleProfile(StringRef FileName, const Twine &Msg,
                              DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_SampleProfile, Severity), FileName(FileName),
        Msg(Msg) {}
  DiagnosticInfoSampleProfile(const Twine &Msg,
                              DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_SampleProfile, Severity), Msg(Msg) {}

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_SampleProfile;
  }

  StringRef getFileName() const { return FileName; }
  unsigned getLineNum() const { return LineNum; }
  const Twine &getMsg() const { return Msg; }

private:
  /// Name of the input file associated with this diagnostic.
  StringRef FileName;

  /// Line number where the diagnostic occurred. If 0, no line number will
  /// be emitted in the message.
  unsigned LineNum = 0;

  /// Message to report.
  const Twine &Msg;
};

/// Diagnostic information for the PGO profiler.
class DiagnosticInfoPGOProfile : public DiagnosticInfo {
public:
  DiagnosticInfoPGOProfile(const char *FileName, const Twine &Msg,
                           DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfo(DK_PGOProfile, Severity), FileName(FileName), Msg(Msg) {}

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_PGOProfile;
  }

  const char *getFileName() const { return FileName; }
  const Twine &getMsg() const { return Msg; }

private:
  /// Name of the input file associated with this diagnostic.
  const char *FileName;

  /// Message to report.
  const Twine &Msg;
};

class DiagnosticLocation {
  DIFile *File = nullptr;
  unsigned Line = 0;
  unsigned Column = 0;

public:
  DiagnosticLocation() = default;
  DiagnosticLocation(const DebugLoc &DL);
  DiagnosticLocation(const DISubprogram *SP);

  bool isValid() const { return File; }
  /// Return the full path to the file.
  std::string getAbsolutePath() const;
  /// Return the file name relative to the compilation directory.
  StringRef getRelativePath() const;
  unsigned getLine() const { return Line; }
  unsigned getColumn() const { return Column; }
};

/// Common features for diagnostics with an associated location.
class DiagnosticInfoWithLocationBase : public DiagnosticInfo {
  virtual void anchor() override;
public:
  /// \p Fn is the function where the diagnostic is being emitted. \p Loc is
  /// the location information to use in the diagnostic.
  DiagnosticInfoWithLocationBase(enum DiagnosticKind Kind,
                                 enum DiagnosticSeverity Severity,
                                 const Function &Fn,
                                 const DiagnosticLocation &Loc)
      : DiagnosticInfo(Kind, Severity), Fn(Fn), Loc(Loc) {}

  /// Return true if location information is available for this diagnostic.
  bool isLocationAvailable() const { return Loc.isValid(); }

  /// Return a string with the location information for this diagnostic
  /// in the format "file:line:col". If location information is not available,
  /// it returns "<unknown>:0:0".
  const std::string getLocationStr() const;

  /// Return location information for this diagnostic in three parts:
  /// the relative source file path, line number and column.
  void getLocation(StringRef &RelativePath, unsigned &Line,
                   unsigned &Column) const;

  /// Return the absolute path tot the file.
  std::string getAbsolutePath() const;
  
  const Function &getFunction() const { return Fn; }
  DiagnosticLocation getLocation() const { return Loc; }

private:
  /// Function where this diagnostic is triggered.
  const Function &Fn;

  /// Debug location where this diagnostic is triggered.
  DiagnosticLocation Loc;
};

/// Common features for diagnostics dealing with optimization remarks
/// that are used by both IR and MIR passes.
class DiagnosticInfoOptimizationBase : public DiagnosticInfoWithLocationBase {
public:
  /// Used to set IsVerbose via the stream interface.
  struct setIsVerbose {};

  /// When an instance of this is inserted into the stream, the arguments
  /// following will not appear in the remark printed in the compiler output
  /// (-Rpass) but only in the optimization record file
  /// (-fsave-optimization-record).
  struct setExtraArgs {};

  /// Used in the streaming interface as the general argument type.  It
  /// internally converts everything into a key-value pair.
  struct Argument {
    std::string Key;
    std::string Val;
    // If set, the debug location corresponding to the value.
    DiagnosticLocation Loc;

    explicit Argument(StringRef Str = "") : Key("String"), Val(Str) {}
    Argument(StringRef Key, const Value *V);
    Argument(StringRef Key, const Type *T);
    Argument(StringRef Key, StringRef S);
    Argument(StringRef Key, const char *S) : Argument(Key, StringRef(S)) {};
    Argument(StringRef Key, int N);
    Argument(StringRef Key, float N);
    Argument(StringRef Key, long N);
    Argument(StringRef Key, long long N);
    Argument(StringRef Key, unsigned N);
    Argument(StringRef Key, unsigned long N);
    Argument(StringRef Key, unsigned long long N);
    Argument(StringRef Key, bool B) : Key(Key), Val(B ? "true" : "false") {}
    Argument(StringRef Key, DebugLoc dl);
  };

  /// \p PassName is the name of the pass emitting this diagnostic. \p
  /// RemarkName is a textual identifier for the remark (single-word,
  /// camel-case). \p Fn is the function where the diagnostic is being emitted.
  /// \p Loc is the location information to use in the diagnostic. If line table
  /// information is available, the diagnostic will include the source code
  /// location.
  DiagnosticInfoOptimizationBase(enum DiagnosticKind Kind,
                                 enum DiagnosticSeverity Severity,
                                 const char *PassName, StringRef RemarkName,
                                 const Function &Fn,
                                 const DiagnosticLocation &Loc)
      : DiagnosticInfoWithLocationBase(Kind, Severity, Fn, Loc),
        PassName(PassName), RemarkName(RemarkName) {}

  void insert(StringRef S);
  void insert(Argument A);
  void insert(setIsVerbose V);
  void insert(setExtraArgs EA);

  /// \see DiagnosticInfo::print.
  void print(DiagnosticPrinter &DP) const override;

  /// Return true if this optimization remark is enabled by one of
  /// of the LLVM command line flags (-pass-remarks, -pass-remarks-missed,
  /// or -pass-remarks-analysis). Note that this only handles the LLVM
  /// flags. We cannot access Clang flags from here (they are handled
  /// in BackendConsumer::OptimizationRemarkHandler).
  virtual bool isEnabled() const = 0;

  StringRef getPassName() const { return PassName; }
  StringRef getRemarkName() const { return RemarkName; }
  std::string getMsg() const;
  Optional<uint64_t> getHotness() const { return Hotness; }
  void setHotness(Optional<uint64_t> H) { Hotness = H; }

  bool isVerbose() const { return IsVerbose; }

  ArrayRef<Argument> getArgs() const { return Args; }

  static bool classof(const DiagnosticInfo *DI) {
    return (DI->getKind() >= DK_FirstRemark &&
            DI->getKind() <= DK_LastRemark) ||
           (DI->getKind() >= DK_FirstMachineRemark &&
            DI->getKind() <= DK_LastMachineRemark);
  }

  bool isPassed() const {
    return (getKind() == DK_OptimizationRemark ||
            getKind() == DK_MachineOptimizationRemark);
  }

  bool isMissed() const {
    return (getKind() == DK_OptimizationRemarkMissed ||
            getKind() == DK_MachineOptimizationRemarkMissed);
  }

  bool isAnalysis() const {
    return (getKind() == DK_OptimizationRemarkAnalysis ||
            getKind() == DK_MachineOptimizationRemarkAnalysis);
  }

protected:
  /// Name of the pass that triggers this report. If this matches the
  /// regular expression given in -Rpass=regexp, then the remark will
  /// be emitted.
  const char *PassName;

  /// Textual identifier for the remark (single-word, camel-case). Can be used
  /// by external tools reading the output file for optimization remarks to
  /// identify the remark.
  StringRef RemarkName;

  /// If profile information is available, this is the number of times the
  /// corresponding code was executed in a profile instrumentation run.
  Optional<uint64_t> Hotness;

  /// Arguments collected via the streaming interface.
  SmallVector<Argument, 4> Args;

  /// The remark is expected to be noisy.
  bool IsVerbose = false;

  /// If positive, the index of the first argument that only appear in
  /// the optimization records and not in the remark printed in the compiler
  /// output.
  int FirstExtraArgIndex = -1;
};

/// Allow the insertion operator to return the actual remark type rather than a
/// common base class.  This allows returning the result of the insertion
/// directly by value, e.g. return OptimizationRemarkAnalysis(...) << "blah".
template <class RemarkT>
RemarkT &
operator<<(RemarkT &R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               StringRef>::type S) {
  R.insert(S);
  return R;
}

/// Also allow r-value for the remark to allow insertion into a
/// temporarily-constructed remark.
template <class RemarkT>
RemarkT &
operator<<(RemarkT &&R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               StringRef>::type S) {
  R.insert(S);
  return R;
}

template <class RemarkT>
RemarkT &
operator<<(RemarkT &R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               DiagnosticInfoOptimizationBase::Argument>::type A) {
  R.insert(A);
  return R;
}

template <class RemarkT>
RemarkT &
operator<<(RemarkT &&R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               DiagnosticInfoOptimizationBase::Argument>::type A) {
  R.insert(A);
  return R;
}

template <class RemarkT>
RemarkT &
operator<<(RemarkT &R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               DiagnosticInfoOptimizationBase::setIsVerbose>::type V) {
  R.insert(V);
  return R;
}

template <class RemarkT>
RemarkT &
operator<<(RemarkT &&R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               DiagnosticInfoOptimizationBase::setIsVerbose>::type V) {
  R.insert(V);
  return R;
}

template <class RemarkT>
RemarkT &
operator<<(RemarkT &R,
           typename std::enable_if<
               std::is_base_of<DiagnosticInfoOptimizationBase, RemarkT>::value,
               DiagnosticInfoOptimizationBase::setExtraArgs>::type EA) {
  R.insert(EA);
  return R;
}

/// Common features for diagnostics dealing with optimization remarks
/// that are used by IR passes.
class DiagnosticInfoIROptimization : public DiagnosticInfoOptimizationBase {
  virtual void anchor() override;
public:
  /// \p PassName is the name of the pass emitting this diagnostic. \p
  /// RemarkName is a textual identifier for the remark (single-word,
  /// camel-case). \p Fn is the function where the diagnostic is being emitted.
  /// \p Loc is the location information to use in the diagnostic. If line table
  /// information is available, the diagnostic will include the source code
  /// location. \p CodeRegion is IR value (currently basic block) that the
  /// optimization operates on. This is currently used to provide run-time
  /// hotness information with PGO.
  DiagnosticInfoIROptimization(enum DiagnosticKind Kind,
                               enum DiagnosticSeverity Severity,
                               const char *PassName, StringRef RemarkName,
                               const Function &Fn,
                               const DiagnosticLocation &Loc,
                               const Value *CodeRegion = nullptr)
      : DiagnosticInfoOptimizationBase(Kind, Severity, PassName, RemarkName, Fn,
                                       Loc),
        CodeRegion(CodeRegion) {}

  /// This is ctor variant allows a pass to build an optimization remark
  /// from an existing remark.
  ///
  /// This is useful when a transformation pass (e.g LV) wants to emit a remark
  /// (\p Orig) generated by one of its analyses (e.g. LAA) as its own analysis
  /// remark.  The string \p Prepend will be emitted before the original
  /// message.
  DiagnosticInfoIROptimization(const char *PassName, StringRef Prepend,
                               const DiagnosticInfoIROptimization &Orig)
      : DiagnosticInfoOptimizationBase(
            (DiagnosticKind)Orig.getKind(), Orig.getSeverity(), PassName,
            Orig.RemarkName, Orig.getFunction(), Orig.getLocation()),
        CodeRegion(Orig.getCodeRegion()) {
    *this << Prepend;
    std::copy(Orig.Args.begin(), Orig.Args.end(), std::back_inserter(Args));
  }

  /// Legacy interface.
  /// \p PassName is the name of the pass emitting this diagnostic.
  /// \p Fn is the function where the diagnostic is being emitted. \p Loc is
  /// the location information to use in the diagnostic. If line table
  /// information is available, the diagnostic will include the source code
  /// location. \p Msg is the message to show. Note that this class does not
  /// copy this message, so this reference must be valid for the whole life time
  /// of the diagnostic.
  DiagnosticInfoIROptimization(enum DiagnosticKind Kind,
                               enum DiagnosticSeverity Severity,
                               const char *PassName, const Function &Fn,
                               const DiagnosticLocation &Loc, const Twine &Msg)
      : DiagnosticInfoOptimizationBase(Kind, Severity, PassName, "", Fn, Loc) {
    *this << Msg.str();
  }

  const Value *getCodeRegion() const { return CodeRegion; }

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() >= DK_FirstRemark && DI->getKind() <= DK_LastRemark;
  }

private:
  /// The IR value (currently basic block) that the optimization operates on.
  /// This is currently used to provide run-time hotness information with PGO.
  const Value *CodeRegion;
};

/// Diagnostic information for applied optimization remarks.
class OptimizationRemark : public DiagnosticInfoIROptimization {
public:
  /// \p PassName is the name of the pass emitting this diagnostic. If this name
  /// matches the regular expression given in -Rpass=, then the diagnostic will
  /// be emitted. \p RemarkName is a textual identifier for the remark (single-
  /// word, camel-case). \p Loc is the debug location and \p CodeRegion is the
  /// region that the optimization operates on (currently only block is
  /// supported).
  OptimizationRemark(const char *PassName, StringRef RemarkName,
                     const DiagnosticLocation &Loc, const Value *CodeRegion);

  /// Same as above, but the debug location and code region are derived from \p
  /// Instr.
  OptimizationRemark(const char *PassName, StringRef RemarkName,
                     const Instruction *Inst);

  /// Same as above, but the debug location and code region are derived from \p
  /// Func.
  OptimizationRemark(const char *PassName, StringRef RemarkName,
                     const Function *Func);

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationRemark;
  }

  /// \see DiagnosticInfoOptimizationBase::isEnabled.
  bool isEnabled() const override;

private:
  /// This is deprecated now and only used by the function API below.
  /// \p PassName is the name of the pass emitting this diagnostic. If
  /// this name matches the regular expression given in -Rpass=, then the
  /// diagnostic will be emitted. \p Fn is the function where the diagnostic
  /// is being emitted. \p Loc is the location information to use in the
  /// diagnostic. If line table information is available, the diagnostic
  /// will include the source code location. \p Msg is the message to show.
  /// Note that this class does not copy this message, so this reference
  /// must be valid for the whole life time of the diagnostic.
  OptimizationRemark(const char *PassName, const Function &Fn,
                     const DiagnosticLocation &Loc, const Twine &Msg)
      : DiagnosticInfoIROptimization(DK_OptimizationRemark, DS_Remark, PassName,
                                     Fn, Loc, Msg) {}
};

/// Diagnostic information for missed-optimization remarks.
class OptimizationRemarkMissed : public DiagnosticInfoIROptimization {
public:
  /// \p PassName is the name of the pass emitting this diagnostic. If this name
  /// matches the regular expression given in -Rpass-missed=, then the
  /// diagnostic will be emitted. \p RemarkName is a textual identifier for the
  /// remark (single-word, camel-case). \p Loc is the debug location and \p
  /// CodeRegion is the region that the optimization operates on (currently only
  /// block is supported).
  OptimizationRemarkMissed(const char *PassName, StringRef RemarkName,
                           const DiagnosticLocation &Loc,
                           const Value *CodeRegion);

  /// Same as above but \p Inst is used to derive code region and debug
  /// location.
  OptimizationRemarkMissed(const char *PassName, StringRef RemarkName,
                           const Instruction *Inst);

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationRemarkMissed;
  }

  /// \see DiagnosticInfoOptimizationBase::isEnabled.
  bool isEnabled() const override;

private:
  /// This is deprecated now and only used by the function API below.
  /// \p PassName is the name of the pass emitting this diagnostic. If
  /// this name matches the regular expression given in -Rpass-missed=, then the
  /// diagnostic will be emitted. \p Fn is the function where the diagnostic
  /// is being emitted. \p Loc is the location information to use in the
  /// diagnostic. If line table information is available, the diagnostic
  /// will include the source code location. \p Msg is the message to show.
  /// Note that this class does not copy this message, so this reference
  /// must be valid for the whole life time of the diagnostic.
  OptimizationRemarkMissed(const char *PassName, const Function &Fn,
                           const DiagnosticLocation &Loc, const Twine &Msg)
      : DiagnosticInfoIROptimization(DK_OptimizationRemarkMissed, DS_Remark,
                                     PassName, Fn, Loc, Msg) {}
};

/// Diagnostic information for optimization analysis remarks.
class OptimizationRemarkAnalysis : public DiagnosticInfoIROptimization {
public:
  /// \p PassName is the name of the pass emitting this diagnostic. If this name
  /// matches the regular expression given in -Rpass-analysis=, then the
  /// diagnostic will be emitted. \p RemarkName is a textual identifier for the
  /// remark (single-word, camel-case). \p Loc is the debug location and \p
  /// CodeRegion is the region that the optimization operates on (currently only
  /// block is supported).
  OptimizationRemarkAnalysis(const char *PassName, StringRef RemarkName,
                             const DiagnosticLocation &Loc,
                             const Value *CodeRegion);

  /// This is ctor variant allows a pass to build an optimization remark
  /// from an existing remark.
  ///
  /// This is useful when a transformation pass (e.g LV) wants to emit a remark
  /// (\p Orig) generated by one of its analyses (e.g. LAA) as its own analysis
  /// remark.  The string \p Prepend will be emitted before the original
  /// message.
  OptimizationRemarkAnalysis(const char *PassName, StringRef Prepend,
                             const OptimizationRemarkAnalysis &Orig)
      : DiagnosticInfoIROptimization(PassName, Prepend, Orig) {}

  /// Same as above but \p Inst is used to derive code region and debug
  /// location.
  OptimizationRemarkAnalysis(const char *PassName, StringRef RemarkName,
                             const Instruction *Inst);

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationRemarkAnalysis;
  }

  /// \see DiagnosticInfoOptimizationBase::isEnabled.
  bool isEnabled() const override;

  static const char *AlwaysPrint;

  bool shouldAlwaysPrint() const { return getPassName() == AlwaysPrint; }

protected:
  OptimizationRemarkAnalysis(enum DiagnosticKind Kind, const char *PassName,
                             const Function &Fn, const DiagnosticLocation &Loc,
                             const Twine &Msg)
      : DiagnosticInfoIROptimization(Kind, DS_Remark, PassName, Fn, Loc, Msg) {}

  OptimizationRemarkAnalysis(enum DiagnosticKind Kind, const char *PassName,
                             StringRef RemarkName,
                             const DiagnosticLocation &Loc,
                             const Value *CodeRegion);

private:
  /// This is deprecated now and only used by the function API below.
  /// \p PassName is the name of the pass emitting this diagnostic. If
  /// this name matches the regular expression given in -Rpass-analysis=, then
  /// the diagnostic will be emitted. \p Fn is the function where the diagnostic
  /// is being emitted. \p Loc is the location information to use in the
  /// diagnostic. If line table information is available, the diagnostic will
  /// include the source code location. \p Msg is the message to show. Note that
  /// this class does not copy this message, so this reference must be valid for
  /// the whole life time of the diagnostic.
  OptimizationRemarkAnalysis(const char *PassName, const Function &Fn,
                             const DiagnosticLocation &Loc, const Twine &Msg)
      : DiagnosticInfoIROptimization(DK_OptimizationRemarkAnalysis, DS_Remark,
                                     PassName, Fn, Loc, Msg) {}
};

/// Diagnostic information for optimization analysis remarks related to
/// floating-point non-commutativity.
class OptimizationRemarkAnalysisFPCommute : public OptimizationRemarkAnalysis {
  virtual void anchor();
public:
  /// \p PassName is the name of the pass emitting this diagnostic. If this name
  /// matches the regular expression given in -Rpass-analysis=, then the
  /// diagnostic will be emitted. \p RemarkName is a textual identifier for the
  /// remark (single-word, camel-case). \p Loc is the debug location and \p
  /// CodeRegion is the region that the optimization operates on (currently only
  /// block is supported). The front-end will append its own message related to
  /// options that address floating-point non-commutativity.
  OptimizationRemarkAnalysisFPCommute(const char *PassName,
                                      StringRef RemarkName,
                                      const DiagnosticLocation &Loc,
                                      const Value *CodeRegion)
      : OptimizationRemarkAnalysis(DK_OptimizationRemarkAnalysisFPCommute,
                                   PassName, RemarkName, Loc, CodeRegion) {}

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationRemarkAnalysisFPCommute;
  }

private:
  /// This is deprecated now and only used by the function API below.
  /// \p PassName is the name of the pass emitting this diagnostic. If
  /// this name matches the regular expression given in -Rpass-analysis=, then
  /// the diagnostic will be emitted. \p Fn is the function where the diagnostic
  /// is being emitted. \p Loc is the location information to use in the
  /// diagnostic. If line table information is available, the diagnostic will
  /// include the source code location. \p Msg is the message to show. The
  /// front-end will append its own message related to options that address
  /// floating-point non-commutativity. Note that this class does not copy this
  /// message, so this reference must be valid for the whole life time of the
  /// diagnostic.
  OptimizationRemarkAnalysisFPCommute(const char *PassName, const Function &Fn,
                                      const DiagnosticLocation &Loc,
                                      const Twine &Msg)
      : OptimizationRemarkAnalysis(DK_OptimizationRemarkAnalysisFPCommute,
                                   PassName, Fn, Loc, Msg) {}
};

/// Diagnostic information for optimization analysis remarks related to
/// pointer aliasing.
class OptimizationRemarkAnalysisAliasing : public OptimizationRemarkAnalysis {
  virtual void anchor();
public:
  /// \p PassName is the name of the pass emitting this diagnostic. If this name
  /// matches the regular expression given in -Rpass-analysis=, then the
  /// diagnostic will be emitted. \p RemarkName is a textual identifier for the
  /// remark (single-word, camel-case). \p Loc is the debug location and \p
  /// CodeRegion is the region that the optimization operates on (currently only
  /// block is supported). The front-end will append its own message related to
  /// options that address pointer aliasing legality.
  OptimizationRemarkAnalysisAliasing(const char *PassName, StringRef RemarkName,
                                     const DiagnosticLocation &Loc,
                                     const Value *CodeRegion)
      : OptimizationRemarkAnalysis(DK_OptimizationRemarkAnalysisAliasing,
                                   PassName, RemarkName, Loc, CodeRegion) {}

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationRemarkAnalysisAliasing;
  }

private:
  /// This is deprecated now and only used by the function API below.
  /// \p PassName is the name of the pass emitting this diagnostic. If
  /// this name matches the regular expression given in -Rpass-analysis=, then
  /// the diagnostic will be emitted. \p Fn is the function where the diagnostic
  /// is being emitted. \p Loc is the location information to use in the
  /// diagnostic. If line table information is available, the diagnostic will
  /// include the source code location. \p Msg is the message to show. The
  /// front-end will append its own message related to options that address
  /// pointer aliasing legality. Note that this class does not copy this
  /// message, so this reference must be valid for the whole life time of the
  /// diagnostic.
  OptimizationRemarkAnalysisAliasing(const char *PassName, const Function &Fn,
                                     const DiagnosticLocation &Loc,
                                     const Twine &Msg)
      : OptimizationRemarkAnalysis(DK_OptimizationRemarkAnalysisAliasing,
                                   PassName, Fn, Loc, Msg) {}
};

/// Diagnostic information for machine IR parser.
class DiagnosticInfoMIRParser : public DiagnosticInfo {
  const SMDiagnostic &Diagnostic;

public:
  DiagnosticInfoMIRParser(DiagnosticSeverity Severity,
                          const SMDiagnostic &Diagnostic)
      : DiagnosticInfo(DK_MIRParser, Severity), Diagnostic(Diagnostic) {}

  const SMDiagnostic &getDiagnostic() const { return Diagnostic; }

  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_MIRParser;
  }
};

/// Diagnostic information for ISel fallback path.
class DiagnosticInfoISelFallback : public DiagnosticInfo {
  /// The function that is concerned by this diagnostic.
  const Function &Fn;

public:
  DiagnosticInfoISelFallback(const Function &Fn,
                             DiagnosticSeverity Severity = DS_Warning)
      : DiagnosticInfo(DK_ISelFallback, Severity), Fn(Fn) {}

  const Function &getFunction() const { return Fn; }

  void print(DiagnosticPrinter &DP) const override;

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_ISelFallback;
  }
};

// Create wrappers for C Binding types (see CBindingWrapping.h).
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(DiagnosticInfo, LLVMDiagnosticInfoRef)

/// Diagnostic information for optimization failures.
class DiagnosticInfoOptimizationFailure : public DiagnosticInfoIROptimization {
public:
  /// \p Fn is the function where the diagnostic is being emitted. \p Loc is
  /// the location information to use in the diagnostic. If line table
  /// information is available, the diagnostic will include the source code
  /// location. \p Msg is the message to show. Note that this class does not
  /// copy this message, so this reference must be valid for the whole life time
  /// of the diagnostic.
  DiagnosticInfoOptimizationFailure(const Function &Fn,
                                    const DiagnosticLocation &Loc,
                                    const Twine &Msg)
      : DiagnosticInfoIROptimization(DK_OptimizationFailure, DS_Warning,
                                     nullptr, Fn, Loc, Msg) {}

  /// \p PassName is the name of the pass emitting this diagnostic.  \p
  /// RemarkName is a textual identifier for the remark (single-word,
  /// camel-case).  \p Loc is the debug location and \p CodeRegion is the
  /// region that the optimization operates on (currently basic block is
  /// supported).
  DiagnosticInfoOptimizationFailure(const char *PassName, StringRef RemarkName,
                                    const DiagnosticLocation &Loc,
                                    const Value *CodeRegion);

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_OptimizationFailure;
  }

  /// \see DiagnosticInfoOptimizationBase::isEnabled.
  bool isEnabled() const override;
};

/// Diagnostic information for unsupported feature in backend.
class DiagnosticInfoUnsupported : public DiagnosticInfoWithLocationBase {
private:
  Twine Msg;

public:
  /// \p Fn is the function where the diagnostic is being emitted. \p Loc is
  /// the location information to use in the diagnostic. If line table
  /// information is available, the diagnostic will include the source code
  /// location. \p Msg is the message to show. Note that this class does not
  /// copy this message, so this reference must be valid for the whole life time
  /// of the diagnostic.
  DiagnosticInfoUnsupported(
      const Function &Fn, const Twine &Msg,
      const DiagnosticLocation &Loc = DiagnosticLocation(),
      DiagnosticSeverity Severity = DS_Error)
      : DiagnosticInfoWithLocationBase(DK_Unsupported, Severity, Fn, Loc),
        Msg(Msg) {}

  static bool classof(const DiagnosticInfo *DI) {
    return DI->getKind() == DK_Unsupported;
  }

  const Twine &getMessage() const { return Msg; }

  void print(DiagnosticPrinter &DP) const override;
};

} // end namespace llvm

#endif // LLVM_IR_DIAGNOSTICINFO_H