src/llvm/include/llvm/IR/DIBuilder.h

   1 //===- DIBuilder.h - Debug Information Builder ------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines a DIBuilder that is useful for creating debugging
  11 // information entries in LLVM IR form.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_IR_DIBUILDER_H
  16 #define LLVM_IR_DIBUILDER_H
  17
  18 #include "llvm/ADT/ArrayRef.h"
  19 #include "llvm/ADT/StringRef.h"
  20 #include "llvm/IR/DebugInfo.h"
  21 #include "llvm/IR/TrackingMDRef.h"
  22 #include "llvm/IR/ValueHandle.h"
  23 #include "llvm/Support/DataTypes.h"
  24
  25 namespace llvm {
  26   class BasicBlock;
  27   class Instruction;
  28   class Function;
  29   class Module;
  30   class Value;
  31   class Constant;
  32   class LLVMContext;
  33   class MDNode;
  34   class StringRef;
  35   class DIBasicType;
  36   class DICompileUnit;
  37   class DICompositeType;
  38   class DIDerivedType;
  39   class DIDescriptor;
  40   class DIFile;
  41   class DIEnumerator;
  42   class DIType;
  43   class DIGlobalVariable;
  44   class DIImportedEntity;
  45   class DINameSpace;
  46   class DIVariable;
  47   class DISubrange;
  48   class DILexicalBlockFile;
  49   class DILexicalBlock;
  50   class DIScope;
  51   class DISubprogram;
  52   class DITemplateTypeParameter;
  53   class DITemplateValueParameter;
  54   class DIObjCProperty;
  55
  56   class DIBuilder {
  57     Module &M;
  58     LLVMContext &VMContext;
  59
  60     MDNode *TempEnumTypes;
  61     MDNode *TempRetainTypes;
  62     MDNode *TempSubprograms;
  63     MDNode *TempGVs;
  64     MDNode *TempImportedModules;
  65
  66     Function *DeclareFn;     // llvm.dbg.declare
  67     Function *ValueFn;       // llvm.dbg.value
  68
  69     SmallVector<Metadata *, 4> AllEnumTypes;
  70     /// Track the RetainTypes, since they can be updated later on.
  71     SmallVector<TrackingMDNodeRef, 4> AllRetainTypes;
  72     SmallVector<Metadata *, 4> AllSubprograms;
  73     SmallVector<Metadata *, 4> AllGVs;
  74     SmallVector<TrackingMDNodeRef, 4> AllImportedModules;
  75
  76     /// \brief Track nodes that may be unresolved.
  77     SmallVector<TrackingMDNodeRef, 4> UnresolvedNodes;
  78     bool AllowUnresolvedNodes;
  79
  80     /// Each subprogram's preserved local variables.
  81     DenseMap<MDNode *, std::vector<TrackingMDNodeRef>> PreservedVariables;
  82
  83     DIBuilder(const DIBuilder &) LLVM_DELETED_FUNCTION;
  84     void operator=(const DIBuilder &) LLVM_DELETED_FUNCTION;
  85
  86     /// \brief Create a temporary.
  87     ///
  88     /// Create an \a MDNodeFwdDecl and track it in \a UnresolvedNodes.
  89     void trackIfUnresolved(MDNode *N);
  90
  91   public:
  92     /// \brief Construct a builder for a module.
  93     ///
  94     /// If \c AllowUnresolved, collect unresolved nodes attached to the module
  95     /// in order to resolve cycles during \a finalize().
  96     explicit DIBuilder(Module &M, bool AllowUnresolved = true);
  97     enum DebugEmissionKind { FullDebug=1, LineTablesOnly };
  98
  99     /// finalize - Construct any deferred debug info descriptors.
 100     void finalize();
 101
 102     /// createCompileUnit - A CompileUnit provides an anchor for all debugging
 103     /// information generated during this instance of compilation.
 104     /// @param Lang     Source programming language, eg. dwarf::DW_LANG_C99
 105     /// @param File     File name
 106     /// @param Dir      Directory
 107     /// @param Producer Identify the producer of debugging information and code.
 108     ///                 Usually this is a compiler version string.
 109     /// @param isOptimized A boolean flag which indicates whether optimization
 110     ///                    is ON or not.
 111     /// @param Flags    This string lists command line options. This string is
 112     ///                 directly embedded in debug info output which may be used
 113     ///                 by a tool analyzing generated debugging information.
 114     /// @param RV       This indicates runtime version for languages like
 115     ///                 Objective-C.
 116     /// @param SplitName The name of the file that we'll split debug info out
 117     ///                  into.
 118     /// @param Kind     The kind of debug information to generate.
 119     /// @param EmitDebugInfo   A boolean flag which indicates whether debug
 120     ///                        information should be written to the final
 121     ///                        output or not. When this is false, debug
 122     ///                        information annotations will be present in
 123     ///                        the IL but they are not written to the final
 124     ///                        assembly or object file. This supports tracking
 125     ///                        source location information in the back end
 126     ///                        without actually changing the output (e.g.,
 127     ///                        when using optimization remarks).
 128     DICompileUnit createCompileUnit(unsigned Lang, StringRef File,
 129                                     StringRef Dir, StringRef Producer,
 130                                     bool isOptimized, StringRef Flags,
 131                                     unsigned RV,
 132                                     StringRef SplitName = StringRef(),
 133                                     DebugEmissionKind Kind = FullDebug,
 134                                     bool EmitDebugInfo = true);
 135
 136     /// createFile - Create a file descriptor to hold debugging information
 137     /// for a file.
 138     DIFile createFile(StringRef Filename, StringRef Directory);
 139
 140     /// createEnumerator - Create a single enumerator value.
 141     DIEnumerator createEnumerator(StringRef Name, int64_t Val);
 142
 143     /// \brief Create a DWARF unspecified type.
 144     DIBasicType createUnspecifiedType(StringRef Name);
 145
 146     /// \brief Create C++11 nullptr type.
 147     DIBasicType createNullPtrType();
 148
 149     /// createBasicType - Create debugging information entry for a basic
 150     /// type.
 151     /// @param Name        Type name.
 152     /// @param SizeInBits  Size of the type.
 153     /// @param AlignInBits Type alignment.
 154     /// @param Encoding    DWARF encoding code, e.g. dwarf::DW_ATE_float.
 155     DIBasicType createBasicType(StringRef Name, uint64_t SizeInBits,
 156                                 uint64_t AlignInBits, unsigned Encoding);
 157
 158     /// createQualifiedType - Create debugging information entry for a qualified
 159     /// type, e.g. 'const int'.
 160     /// @param Tag         Tag identifing type, e.g. dwarf::TAG_volatile_type
 161     /// @param FromTy      Base Type.
 162     DIDerivedType createQualifiedType(unsigned Tag, DIType FromTy);
 163
 164     /// createPointerType - Create debugging information entry for a pointer.
 165     /// @param PointeeTy   Type pointed by this pointer.
 166     /// @param SizeInBits  Size.
 167     /// @param AlignInBits Alignment. (optional)
 168     /// @param Name        Pointer type name. (optional)
 169     DIDerivedType
 170     createPointerType(DIType PointeeTy, uint64_t SizeInBits,
 171                       uint64_t AlignInBits = 0, StringRef Name = StringRef());
 172
 173     /// \brief Create debugging information entry for a pointer to member.
 174     /// @param PointeeTy Type pointed to by this pointer.
 175     /// @param SizeInBits  Size.
 176     /// @param AlignInBits Alignment. (optional)
 177     /// @param Class Type for which this pointer points to members of.
 178     DIDerivedType createMemberPointerType(DIType PointeeTy, DIType Class,
 179                                           uint64_t SizeInBits,
 180                                           uint64_t AlignInBits = 0);
 181
 182     /// createReferenceType - Create debugging information entry for a c++
 183     /// style reference or rvalue reference type.
 184     DIDerivedType createReferenceType(unsigned Tag, DIType RTy);
 185
 186     /// createTypedef - Create debugging information entry for a typedef.
 187     /// @param Ty          Original type.
 188     /// @param Name        Typedef name.
 189     /// @param File        File where this type is defined.
 190     /// @param LineNo      Line number.
 191     /// @param Context     The surrounding context for the typedef.
 192     DIDerivedType createTypedef(DIType Ty, StringRef Name, DIFile File,
 193                                 unsigned LineNo, DIDescriptor Context);
 194
 195     /// createFriend - Create debugging information entry for a 'friend'.
 196     DIDerivedType createFriend(DIType Ty, DIType FriendTy);
 197
 198     /// createInheritance - Create debugging information entry to establish
 199     /// inheritance relationship between two types.
 200     /// @param Ty           Original type.
 201     /// @param BaseTy       Base type. Ty is inherits from base.
 202     /// @param BaseOffset   Base offset.
 203     /// @param Flags        Flags to describe inheritance attribute,
 204     ///                     e.g. private
 205     DIDerivedType createInheritance(DIType Ty, DIType BaseTy,
 206                                     uint64_t BaseOffset, unsigned Flags);
 207
 208     /// createMemberType - Create debugging information entry for a member.
 209     /// @param Scope        Member scope.
 210     /// @param Name         Member name.
 211     /// @param File         File where this member is defined.
 212     /// @param LineNo       Line number.
 213     /// @param SizeInBits   Member size.
 214     /// @param AlignInBits  Member alignment.
 215     /// @param OffsetInBits Member offset.
 216     /// @param Flags        Flags to encode member attribute, e.g. private
 217     /// @param Ty           Parent type.
 218     DIDerivedType
 219     createMemberType(DIDescriptor Scope, StringRef Name, DIFile File,
 220                      unsigned LineNo, uint64_t SizeInBits, uint64_t AlignInBits,
 221                      uint64_t OffsetInBits, unsigned Flags, DIType Ty);
 222
 223     /// createStaticMemberType - Create debugging information entry for a
 224     /// C++ static data member.
 225     /// @param Scope      Member scope.
 226     /// @param Name       Member name.
 227     /// @param File       File where this member is declared.
 228     /// @param LineNo     Line number.
 229     /// @param Ty         Type of the static member.
 230     /// @param Flags      Flags to encode member attribute, e.g. private.
 231     /// @param Val        Const initializer of the member.
 232     DIDerivedType createStaticMemberType(DIDescriptor Scope, StringRef Name,
 233                                          DIFile File, unsigned LineNo,
 234                                          DIType Ty, unsigned Flags,
 235                                          llvm::Constant *Val);
 236
 237     /// createObjCIVar - Create debugging information entry for Objective-C
 238     /// instance variable.
 239     /// @param Name         Member name.
 240     /// @param File         File where this member is defined.
 241     /// @param LineNo       Line number.
 242     /// @param SizeInBits   Member size.
 243     /// @param AlignInBits  Member alignment.
 244     /// @param OffsetInBits Member offset.
 245     /// @param Flags        Flags to encode member attribute, e.g. private
 246     /// @param Ty           Parent type.
 247     /// @param PropertyNode Property associated with this ivar.
 248     DIDerivedType createObjCIVar(StringRef Name, DIFile File,
 249                                  unsigned LineNo, uint64_t SizeInBits,
 250                                  uint64_t AlignInBits, uint64_t OffsetInBits,
 251                                  unsigned Flags, DIType Ty,
 252                                  MDNode *PropertyNode);
 253
 254     /// createObjCProperty - Create debugging information entry for Objective-C
 255     /// property.
 256     /// @param Name         Property name.
 257     /// @param File         File where this property is defined.
 258     /// @param LineNumber   Line number.
 259     /// @param GetterName   Name of the Objective C property getter selector.
 260     /// @param SetterName   Name of the Objective C property setter selector.
 261     /// @param PropertyAttributes Objective C property attributes.
 262     /// @param Ty           Type.
 263     DIObjCProperty createObjCProperty(StringRef Name,
 264                                       DIFile File, unsigned LineNumber,
 265                                       StringRef GetterName,
 266                                       StringRef SetterName,
 267                                       unsigned PropertyAttributes,
 268                                       DIType Ty);
 269
 270     /// createClassType - Create debugging information entry for a class.
 271     /// @param Scope        Scope in which this class is defined.
 272     /// @param Name         class name.
 273     /// @param File         File where this member is defined.
 274     /// @param LineNumber   Line number.
 275     /// @param SizeInBits   Member size.
 276     /// @param AlignInBits  Member alignment.
 277     /// @param OffsetInBits Member offset.
 278     /// @param Flags        Flags to encode member attribute, e.g. private
 279     /// @param Elements     class members.
 280     /// @param VTableHolder Debug info of the base class that contains vtable
 281     ///                     for this type. This is used in
 282     ///                     DW_AT_containing_type. See DWARF documentation
 283     ///                     for more info.
 284     /// @param TemplateParms Template type parameters.
 285     /// @param UniqueIdentifier A unique identifier for the class.
 286     DICompositeType createClassType(DIDescriptor Scope, StringRef Name,
 287                                     DIFile File, unsigned LineNumber,
 288                                     uint64_t SizeInBits, uint64_t AlignInBits,
 289                                     uint64_t OffsetInBits, unsigned Flags,
 290                                     DIType DerivedFrom, DIArray Elements,
 291                                     DIType VTableHolder = DIType(),
 292                                     MDNode *TemplateParms = nullptr,
 293                                     StringRef UniqueIdentifier = StringRef());
 294
 295     /// createStructType - Create debugging information entry for a struct.
 296     /// @param Scope        Scope in which this struct is defined.
 297     /// @param Name         Struct name.
 298     /// @param File         File where this member is defined.
 299     /// @param LineNumber   Line number.
 300     /// @param SizeInBits   Member size.
 301     /// @param AlignInBits  Member alignment.
 302     /// @param Flags        Flags to encode member attribute, e.g. private
 303     /// @param Elements     Struct elements.
 304     /// @param RunTimeLang  Optional parameter, Objective-C runtime version.
 305     /// @param UniqueIdentifier A unique identifier for the struct.
 306     DICompositeType createStructType(DIDescriptor Scope, StringRef Name,
 307                                      DIFile File, unsigned LineNumber,
 308                                      uint64_t SizeInBits, uint64_t AlignInBits,
 309                                      unsigned Flags, DIType DerivedFrom,
 310                                      DIArray Elements, unsigned RunTimeLang = 0,
 311                                      DIType VTableHolder = DIType(),
 312                                      StringRef UniqueIdentifier = StringRef());
 313
 314     /// createUnionType - Create debugging information entry for an union.
 315     /// @param Scope        Scope in which this union is defined.
 316     /// @param Name         Union name.
 317     /// @param File         File where this member is defined.
 318     /// @param LineNumber   Line number.
 319     /// @param SizeInBits   Member size.
 320     /// @param AlignInBits  Member alignment.
 321     /// @param Flags        Flags to encode member attribute, e.g. private
 322     /// @param Elements     Union elements.
 323     /// @param RunTimeLang  Optional parameter, Objective-C runtime version.
 324     /// @param UniqueIdentifier A unique identifier for the union.
 325     DICompositeType createUnionType(
 326         DIDescriptor Scope, StringRef Name, DIFile File, unsigned LineNumber,
 327         uint64_t SizeInBits, uint64_t AlignInBits, unsigned Flags,
 328         DIArray Elements, unsigned RunTimeLang = 0,
 329         StringRef UniqueIdentifier = StringRef());
 330
 331     /// createTemplateTypeParameter - Create debugging information for template
 332     /// type parameter.
 333     /// @param Scope        Scope in which this type is defined.
 334     /// @param Name         Type parameter name.
 335     /// @param Ty           Parameter type.
 336     /// @param File         File where this type parameter is defined.
 337     /// @param LineNo       Line number.
 338     /// @param ColumnNo     Column Number.
 339     DITemplateTypeParameter
 340     createTemplateTypeParameter(DIDescriptor Scope, StringRef Name, DIType Ty,
 341                                 MDNode *File = nullptr, unsigned LineNo = 0,
 342                                 unsigned ColumnNo = 0);
 343
 344     /// createTemplateValueParameter - Create debugging information for template
 345     /// value parameter.
 346     /// @param Scope        Scope in which this type is defined.
 347     /// @param Name         Value parameter name.
 348     /// @param Ty           Parameter type.
 349     /// @param Val          Constant parameter value.
 350     /// @param File         File where this type parameter is defined.
 351     /// @param LineNo       Line number.
 352     /// @param ColumnNo     Column Number.
 353     DITemplateValueParameter
 354     createTemplateValueParameter(DIDescriptor Scope, StringRef Name, DIType Ty,
 355                                  Constant *Val, MDNode *File = nullptr,
 356                                  unsigned LineNo = 0, unsigned ColumnNo = 0);
 357
 358     /// \brief Create debugging information for a template template parameter.
 359     /// @param Scope        Scope in which this type is defined.
 360     /// @param Name         Value parameter name.
 361     /// @param Ty           Parameter type.
 362     /// @param Val          The fully qualified name of the template.
 363     /// @param File         File where this type parameter is defined.
 364     /// @param LineNo       Line number.
 365     /// @param ColumnNo     Column Number.
 366     DITemplateValueParameter
 367     createTemplateTemplateParameter(DIDescriptor Scope, StringRef Name,
 368                                     DIType Ty, StringRef Val,
 369                                     MDNode *File = nullptr, unsigned LineNo = 0,
 370                                     unsigned ColumnNo = 0);
 371
 372     /// \brief Create debugging information for a template parameter pack.
 373     /// @param Scope        Scope in which this type is defined.
 374     /// @param Name         Value parameter name.
 375     /// @param Ty           Parameter type.
 376     /// @param Val          An array of types in the pack.
 377     /// @param File         File where this type parameter is defined.
 378     /// @param LineNo       Line number.
 379     /// @param ColumnNo     Column Number.
 380     DITemplateValueParameter
 381     createTemplateParameterPack(DIDescriptor Scope, StringRef Name,
 382                                 DIType Ty, DIArray Val, MDNode *File = nullptr,
 383                                 unsigned LineNo = 0, unsigned ColumnNo = 0);
 384
 385     /// createArrayType - Create debugging information entry for an array.
 386     /// @param Size         Array size.
 387     /// @param AlignInBits  Alignment.
 388     /// @param Ty           Element type.
 389     /// @param Subscripts   Subscripts.
 390     DICompositeType createArrayType(uint64_t Size, uint64_t AlignInBits,
 391                                     DIType Ty, DIArray Subscripts);
 392
 393     /// createVectorType - Create debugging information entry for a vector type.
 394     /// @param Size         Array size.
 395     /// @param AlignInBits  Alignment.
 396     /// @param Ty           Element type.
 397     /// @param Subscripts   Subscripts.
 398     DICompositeType createVectorType(uint64_t Size, uint64_t AlignInBits,
 399                                      DIType Ty, DIArray Subscripts);
 400
 401     /// createEnumerationType - Create debugging information entry for an
 402     /// enumeration.
 403     /// @param Scope          Scope in which this enumeration is defined.
 404     /// @param Name           Union name.
 405     /// @param File           File where this member is defined.
 406     /// @param LineNumber     Line number.
 407     /// @param SizeInBits     Member size.
 408     /// @param AlignInBits    Member alignment.
 409     /// @param Elements       Enumeration elements.
 410     /// @param UnderlyingType Underlying type of a C++11/ObjC fixed enum.
 411     /// @param UniqueIdentifier A unique identifier for the enum.
 412     DICompositeType createEnumerationType(DIDescriptor Scope, StringRef Name,
 413         DIFile File, unsigned LineNumber, uint64_t SizeInBits,
 414         uint64_t AlignInBits, DIArray Elements, DIType UnderlyingType,
 415         StringRef UniqueIdentifier = StringRef());
 416
 417     /// createSubroutineType - Create subroutine type.
 418     /// @param File            File in which this subroutine is defined.
 419     /// @param ParameterTypes  An array of subroutine parameter types. This
 420     ///                        includes return type at 0th index.
 421     /// @param Flags           E.g.: LValueReference.
 422     ///                        These flags are used to emit dwarf attributes.
 423     DISubroutineType createSubroutineType(DIFile File,
 424                                           DITypeArray ParameterTypes,
 425                                           unsigned Flags = 0);
 426
 427     /// createArtificialType - Create a new DIType with "artificial" flag set.
 428     DIType createArtificialType(DIType Ty);
 429
 430     /// createObjectPointerType - Create a new DIType with the "object pointer"
 431     /// flag set.
 432     DIType createObjectPointerType(DIType Ty);
 433
 434     /// \brief Create a permanent forward-declared type.
 435     DICompositeType createForwardDecl(unsigned Tag, StringRef Name,
 436                                       DIDescriptor Scope, DIFile F,
 437                                       unsigned Line, unsigned RuntimeLang = 0,
 438                                       uint64_t SizeInBits = 0,
 439                                       uint64_t AlignInBits = 0,
 440                                       StringRef UniqueIdentifier = StringRef());
 441
 442     /// \brief Create a temporary forward-declared type.
 443     DICompositeType createReplaceableForwardDecl(
 444         unsigned Tag, StringRef Name, DIDescriptor Scope, DIFile F,
 445         unsigned Line, unsigned RuntimeLang = 0, uint64_t SizeInBits = 0,
 446         uint64_t AlignInBits = 0, StringRef UniqueIdentifier = StringRef());
 447
 448     /// retainType - Retain DIType in a module even if it is not referenced
 449     /// through debug info anchors.
 450     void retainType(DIType T);
 451
 452     /// createUnspecifiedParameter - Create unspecified parameter type
 453     /// for a subroutine type.
 454     DIBasicType createUnspecifiedParameter();
 455
 456     /// getOrCreateArray - Get a DIArray, create one if required.
 457     DIArray getOrCreateArray(ArrayRef<Metadata *> Elements);
 458
 459     /// getOrCreateTypeArray - Get a DITypeArray, create one if required.
 460     DITypeArray getOrCreateTypeArray(ArrayRef<Metadata *> Elements);
 461
 462     /// getOrCreateSubrange - Create a descriptor for a value range.  This
 463     /// implicitly uniques the values returned.
 464     DISubrange getOrCreateSubrange(int64_t Lo, int64_t Count);
 465
 466
 467     /// createGlobalVariable - Create a new descriptor for the specified
 468     /// variable.
 469     /// @param Context     Variable scope.
 470     /// @param Name        Name of the variable.
 471     /// @param LinkageName Mangled  name of the variable.
 472     /// @param File        File where this variable is defined.
 473     /// @param LineNo      Line number.
 474     /// @param Ty          Variable Type.
 475     /// @param isLocalToUnit Boolean flag indicate whether this variable is
 476     ///                      externally visible or not.
 477     /// @param Val         llvm::Value of the variable.
 478     /// @param Decl        Reference to the corresponding declaration.
 479     DIGlobalVariable createGlobalVariable(DIDescriptor Context, StringRef Name,
 480                                           StringRef LinkageName, DIFile File,
 481                                           unsigned LineNo, DITypeRef Ty,
 482                                           bool isLocalToUnit,
 483                                           llvm::Constant *Val,
 484                                           MDNode *Decl = nullptr);
 485
 486     /// createTempGlobalVariableFwdDecl - Identical to createGlobalVariable
 487     /// except that the resulting DbgNode is temporary and meant to be RAUWed.
 488     DIGlobalVariable createTempGlobalVariableFwdDecl(
 489         DIDescriptor Context, StringRef Name, StringRef LinkageName,
 490         DIFile File, unsigned LineNo, DITypeRef Ty, bool isLocalToUnit,
 491         llvm::Constant *Val, MDNode *Decl = nullptr);
 492
 493     /// createLocalVariable - Create a new descriptor for the specified
 494     /// local variable.
 495     /// @param Tag         Dwarf TAG. Usually DW_TAG_auto_variable or
 496     ///                    DW_TAG_arg_variable.
 497     /// @param Scope       Variable scope.
 498     /// @param Name        Variable name.
 499     /// @param File        File where this variable is defined.
 500     /// @param LineNo      Line number.
 501     /// @param Ty          Variable Type
 502     /// @param AlwaysPreserve Boolean. Set to true if debug info for this
 503     ///                       variable should be preserved in optimized build.
 504     /// @param Flags       Flags, e.g. artificial variable.
 505     /// @param ArgNo       If this variable is an argument then this argument's
 506     ///                    number. 1 indicates 1st argument.
 507     DIVariable createLocalVariable(unsigned Tag, DIDescriptor Scope,
 508                                    StringRef Name,
 509                                    DIFile File, unsigned LineNo,
 510                                    DITypeRef Ty, bool AlwaysPreserve = false,
 511                                    unsigned Flags = 0,
 512                                    unsigned ArgNo = 0);
 513
 514     /// createExpression - Create a new descriptor for the specified
 515     /// variable which has a complex address expression for its address.
 516     /// @param Addr        An array of complex address operations.
 517     DIExpression createExpression(ArrayRef<int64_t> Addr = None);
 518
 519     /// createPieceExpression - Create a descriptor to describe one part
 520     /// of aggregate variable that is fragmented across multiple Values.
 521     ///
 522     /// @param OffsetInBytes Offset of the piece in bytes.
 523     /// @param SizeInBytes   Size of the piece in bytes.
 524     DIExpression createPieceExpression(unsigned OffsetInBytes,
 525                                        unsigned SizeInBytes);
 526
 527     /// createFunction - Create a new descriptor for the specified subprogram.
 528     /// See comments in DISubprogram for descriptions of these fields.
 529     /// @param Scope         Function scope.
 530     /// @param Name          Function name.
 531     /// @param LinkageName   Mangled function name.
 532     /// @param File          File where this variable is defined.
 533     /// @param LineNo        Line number.
 534     /// @param Ty            Function type.
 535     /// @param isLocalToUnit True if this function is not externally visible.
 536     /// @param isDefinition  True if this is a function definition.
 537     /// @param ScopeLine     Set to the beginning of the scope this starts
 538     /// @param Flags         e.g. is this function prototyped or not.
 539     ///                      These flags are used to emit dwarf attributes.
 540     /// @param isOptimized   True if optimization is ON.
 541     /// @param Fn            llvm::Function pointer.
 542     /// @param TParam        Function template parameters.
 543     DISubprogram createFunction(DIDescriptor Scope, StringRef Name,
 544                                 StringRef LinkageName,
 545                                 DIFile File, unsigned LineNo,
 546                                 DICompositeType Ty, bool isLocalToUnit,
 547                                 bool isDefinition,
 548                                 unsigned ScopeLine,
 549                                 unsigned Flags = 0,
 550                                 bool isOptimized = false,
 551                                 Function *Fn = nullptr,
 552                                 MDNode *TParam = nullptr,
 553                                 MDNode *Decl = nullptr);
 554
 555     /// createTempFunctionFwdDecl - Identical to createFunction,
 556     /// except that the resulting DbgNode is meant to be RAUWed.
 557     DISubprogram createTempFunctionFwdDecl(DIDescriptor Scope, StringRef Name,
 558                                            StringRef LinkageName,
 559                                            DIFile File, unsigned LineNo,
 560                                            DICompositeType Ty, bool isLocalToUnit,
 561                                            bool isDefinition,
 562                                            unsigned ScopeLine,
 563                                            unsigned Flags = 0,
 564                                            bool isOptimized = false,
 565                                            Function *Fn = nullptr,
 566                                            MDNode *TParam = nullptr,
 567                                            MDNode *Decl = nullptr);
 568
 569
 570     /// FIXME: this is added for dragonegg. Once we update dragonegg
 571     /// to call resolve function, this will be removed.
 572     DISubprogram createFunction(DIScopeRef Scope, StringRef Name,
 573                                 StringRef LinkageName,
 574                                 DIFile File, unsigned LineNo,
 575                                 DICompositeType Ty, bool isLocalToUnit,
 576                                 bool isDefinition,
 577                                 unsigned ScopeLine,
 578                                 unsigned Flags = 0,
 579                                 bool isOptimized = false,
 580                                 Function *Fn = nullptr,
 581                                 MDNode *TParam = nullptr,
 582                                 MDNode *Decl = nullptr);
 583
 584     /// createMethod - Create a new descriptor for the specified C++ method.
 585     /// See comments in DISubprogram for descriptions of these fields.
 586     /// @param Scope         Function scope.
 587     /// @param Name          Function name.
 588     /// @param LinkageName   Mangled function name.
 589     /// @param File          File where this variable is defined.
 590     /// @param LineNo        Line number.
 591     /// @param Ty            Function type.
 592     /// @param isLocalToUnit True if this function is not externally visible..
 593     /// @param isDefinition  True if this is a function definition.
 594     /// @param Virtuality    Attributes describing virtualness. e.g. pure
 595     ///                      virtual function.
 596     /// @param VTableIndex   Index no of this method in virtual table.
 597     /// @param VTableHolder  Type that holds vtable.
 598     /// @param Flags         e.g. is this function prototyped or not.
 599     ///                      This flags are used to emit dwarf attributes.
 600     /// @param isOptimized   True if optimization is ON.
 601     /// @param Fn            llvm::Function pointer.
 602     /// @param TParam        Function template parameters.
 603     DISubprogram createMethod(DIDescriptor Scope, StringRef Name,
 604                               StringRef LinkageName,
 605                               DIFile File, unsigned LineNo,
 606                               DICompositeType Ty, bool isLocalToUnit,
 607                               bool isDefinition,
 608                               unsigned Virtuality = 0, unsigned VTableIndex = 0,
 609                               DIType VTableHolder = DIType(),
 610                               unsigned Flags = 0,
 611                               bool isOptimized = false,
 612                               Function *Fn = nullptr,
 613                               MDNode *TParam = nullptr);
 614
 615     /// createNameSpace - This creates new descriptor for a namespace
 616     /// with the specified parent scope.
 617     /// @param Scope       Namespace scope
 618     /// @param Name        Name of this namespace
 619     /// @param File        Source file
 620     /// @param LineNo      Line number
 621     DINameSpace createNameSpace(DIDescriptor Scope, StringRef Name,
 622                                 DIFile File, unsigned LineNo);
 623
 624
 625     /// createLexicalBlockFile - This creates a descriptor for a lexical
 626     /// block with a new file attached. This merely extends the existing
 627     /// lexical block as it crosses a file.
 628     /// @param Scope       Lexical block.
 629     /// @param File        Source file.
 630     /// @param Discriminator DWARF path discriminator value.
 631     DILexicalBlockFile createLexicalBlockFile(DIDescriptor Scope, DIFile File,
 632                                               unsigned Discriminator = 0);
 633
 634     /// createLexicalBlock - This creates a descriptor for a lexical block
 635     /// with the specified parent context.
 636     /// @param Scope         Parent lexical scope.
 637     /// @param File          Source file.
 638     /// @param Line          Line number.
 639     /// @param Col           Column number.
 640     DILexicalBlock createLexicalBlock(DIDescriptor Scope, DIFile File,
 641                                       unsigned Line, unsigned Col);
 642
 643     /// \brief Create a descriptor for an imported module.
 644     /// @param Context The scope this module is imported into
 645     /// @param NS The namespace being imported here
 646     /// @param Line Line number
 647     DIImportedEntity createImportedModule(DIScope Context, DINameSpace NS,
 648                                           unsigned Line);
 649
 650     /// \brief Create a descriptor for an imported module.
 651     /// @param Context The scope this module is imported into
 652     /// @param NS An aliased namespace
 653     /// @param Line Line number
 654     DIImportedEntity createImportedModule(DIScope Context, DIImportedEntity NS,
 655                                           unsigned Line);
 656
 657     /// \brief Create a descriptor for an imported function.
 658     /// @param Context The scope this module is imported into
 659     /// @param Decl The declaration (or definition) of a function, type, or
 660     ///             variable
 661     /// @param Line Line number
 662     DIImportedEntity createImportedDeclaration(DIScope Context, DIDescriptor Decl,
 663                                                unsigned Line,
 664                                                StringRef Name = StringRef());
 665     DIImportedEntity createImportedDeclaration(DIScope Context,
 666                                                DIImportedEntity NS,
 667                                                unsigned Line,
 668                                                StringRef Name = StringRef());
 669
 670     /// insertDeclare - Insert a new llvm.dbg.declare intrinsic call.
 671     /// @param Storage     llvm::Value of the variable
 672     /// @param VarInfo     Variable's debug info descriptor.
 673     /// @param Expr         A complex location expression.
 674     /// @param InsertAtEnd Location for the new intrinsic.
 675     Instruction *insertDeclare(llvm::Value *Storage, DIVariable VarInfo,
 676                                DIExpression Expr, BasicBlock *InsertAtEnd);
 677
 678     /// insertDeclare - Insert a new llvm.dbg.declare intrinsic call.
 679     /// @param Storage      llvm::Value of the variable
 680     /// @param VarInfo      Variable's debug info descriptor.
 681     /// @param Expr         A complex location expression.
 682     /// @param InsertBefore Location for the new intrinsic.
 683     Instruction *insertDeclare(llvm::Value *Storage, DIVariable VarInfo,
 684                                DIExpression Expr, Instruction *InsertBefore);
 685
 686     /// insertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
 687     /// @param Val          llvm::Value of the variable
 688     /// @param Offset       Offset
 689     /// @param VarInfo      Variable's debug info descriptor.
 690     /// @param Expr         A complex location expression.
 691     /// @param InsertAtEnd Location for the new intrinsic.
 692     Instruction *insertDbgValueIntrinsic(llvm::Value *Val, uint64_t Offset,
 693                                          DIVariable VarInfo, DIExpression Expr,
 694                                          BasicBlock *InsertAtEnd);
 695
 696     /// insertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
 697     /// @param Val          llvm::Value of the variable
 698     /// @param Offset       Offset
 699     /// @param VarInfo      Variable's debug info descriptor.
 700     /// @param Expr         A complex location expression.
 701     /// @param InsertBefore Location for the new intrinsic.
 702     Instruction *insertDbgValueIntrinsic(llvm::Value *Val, uint64_t Offset,
 703                                          DIVariable VarInfo, DIExpression Expr,
 704                                          Instruction *InsertBefore);
 705
 706     /// \brief Replace the vtable holder in the given composite type.
 707     ///
 708     /// If this creates a self reference, it may orphan some unresolved cycles
 709     /// in the operands of \c T, so \a DIBuilder needs to track that.
 710     void replaceVTableHolder(DICompositeType &T, DICompositeType VTableHolder);
 711
 712     /// \brief Replace arrays on a composite type.
 713     ///
 714     /// If \c T is resolved, but the arrays aren't -- which can happen if \c T
 715     /// has a self-reference -- \a DIBuilder needs to track the array to
 716     /// resolve cycles.
 717     void replaceArrays(DICompositeType &T, DIArray Elements,
 718                        DIArray TParems = DIArray());
 719   };
 720 } // end namespace llvm
 721
 722 #endif