lib/IR/DebugInfoMetadata.cpp

   1 //===- DebugInfoMetadata.cpp - Implement debug info metadata --------------===//
   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 implements the debug info Metadata classes.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/IR/DebugInfoMetadata.h"
  15 #include "LLVMContextImpl.h"
  16 #include "MetadataImpl.h"
  17 #include "llvm/ADT/StringSwitch.h"
  18 #include "llvm/IR/Function.h"
  19
  20 using namespace llvm;
  21
  22 MDLocation::MDLocation(LLVMContext &C, StorageType Storage, unsigned Line,
  23                        unsigned Column, ArrayRef<Metadata *> MDs)
  24     : MDNode(C, MDLocationKind, Storage, MDs) {
  25   assert((MDs.size() == 1 || MDs.size() == 2) &&
  26          "Expected a scope and optional inlined-at");
  27
  28   // Set line and column.
  29   assert(Column < (1u << 16) && "Expected 16-bit column");
  30
  31   SubclassData32 = Line;
  32   SubclassData16 = Column;
  33 }
  34
  35 static void adjustColumn(unsigned &Column) {
  36   // Set to unknown on overflow.  We only have 16 bits to play with here.
  37   if (Column >= (1u << 16))
  38     Column = 0;
  39 }
  40
  41 MDLocation *MDLocation::getImpl(LLVMContext &Context, unsigned Line,
  42                                 unsigned Column, Metadata *Scope,
  43                                 Metadata *InlinedAt, StorageType Storage,
  44                                 bool ShouldCreate) {
  45   // Fixup column.
  46   adjustColumn(Column);
  47
  48   assert(Scope && "Expected scope");
  49   if (Storage == Uniqued) {
  50     if (auto *N =
  51             getUniqued(Context.pImpl->MDLocations,
  52                        MDLocationInfo::KeyTy(Line, Column, Scope, InlinedAt)))
  53       return N;
  54     if (!ShouldCreate)
  55       return nullptr;
  56   } else {
  57     assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
  58   }
  59
  60   SmallVector<Metadata *, 2> Ops;
  61   Ops.push_back(Scope);
  62   if (InlinedAt)
  63     Ops.push_back(InlinedAt);
  64   return storeImpl(new (Ops.size())
  65                        MDLocation(Context, Storage, Line, Column, Ops),
  66                    Storage, Context.pImpl->MDLocations);
  67 }
  68
  69 unsigned DebugNode::getFlag(StringRef Flag) {
  70   return StringSwitch<unsigned>(Flag)
  71 #define HANDLE_DI_FLAG(ID, NAME) .Case("DIFlag" #NAME, Flag##NAME)
  72 #include "llvm/IR/DebugInfoFlags.def"
  73       .Default(0);
  74 }
  75
  76 const char *DebugNode::getFlagString(unsigned Flag) {
  77   switch (Flag) {
  78   default:
  79     return "";
  80 #define HANDLE_DI_FLAG(ID, NAME)                                               \
  81   case Flag##NAME:                                                             \
  82     return "DIFlag" #NAME;
  83 #include "llvm/IR/DebugInfoFlags.def"
  84   }
  85 }
  86
  87 unsigned DebugNode::splitFlags(unsigned Flags,
  88                                SmallVectorImpl<unsigned> &SplitFlags) {
  89   // Accessibility flags need to be specially handled, since they're packed
  90   // together.
  91   if (unsigned A = Flags & FlagAccessibility) {
  92     if (A == FlagPrivate)
  93       SplitFlags.push_back(FlagPrivate);
  94     else if (A == FlagProtected)
  95       SplitFlags.push_back(FlagProtected);
  96     else
  97       SplitFlags.push_back(FlagPublic);
  98     Flags &= ~A;
  99   }
 100
 101 #define HANDLE_DI_FLAG(ID, NAME)                                               \
 102   if (unsigned Bit = Flags & ID) {                                             \
 103     SplitFlags.push_back(Bit);                                                 \
 104     Flags &= ~Bit;                                                             \
 105   }
 106 #include "llvm/IR/DebugInfoFlags.def"
 107
 108   return Flags;
 109 }
 110
 111
 112 static StringRef getString(const MDString *S) {
 113   if (S)
 114     return S->getString();
 115   return StringRef();
 116 }
 117
 118 #ifndef NDEBUG
 119 static bool isCanonical(const MDString *S) {
 120   return !S || !S->getString().empty();
 121 }
 122 #endif
 123
 124 GenericDebugNode *GenericDebugNode::getImpl(LLVMContext &Context, unsigned Tag,
 125                                             MDString *Header,
 126                                             ArrayRef<Metadata *> DwarfOps,
 127                                             StorageType Storage,
 128                                             bool ShouldCreate) {
 129   unsigned Hash = 0;
 130   if (Storage == Uniqued) {
 131     GenericDebugNodeInfo::KeyTy Key(Tag, getString(Header), DwarfOps);
 132     if (auto *N = getUniqued(Context.pImpl->GenericDebugNodes, Key))
 133       return N;
 134     if (!ShouldCreate)
 135       return nullptr;
 136     Hash = Key.getHash();
 137   } else {
 138     assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
 139   }
 140
 141   // Use a nullptr for empty headers.
 142   assert(isCanonical(Header) && "Expected canonical MDString");
 143   Metadata *PreOps[] = {Header};
 144   return storeImpl(new (DwarfOps.size() + 1) GenericDebugNode(
 145                        Context, Storage, Hash, Tag, PreOps, DwarfOps),
 146                    Storage, Context.pImpl->GenericDebugNodes);
 147 }
 148
 149 void GenericDebugNode::recalculateHash() {
 150   setHash(GenericDebugNodeInfo::KeyTy::calculateHash(this));
 151 }
 152
 153 #define UNWRAP_ARGS_IMPL(...) __VA_ARGS__
 154 #define UNWRAP_ARGS(ARGS) UNWRAP_ARGS_IMPL ARGS
 155 #define DEFINE_GETIMPL_LOOKUP(CLASS, ARGS)                                     \
 156   do {                                                                         \
 157     if (Storage == Uniqued) {                                                  \
 158       if (auto *N = getUniqued(Context.pImpl->CLASS##s,                        \
 159                                CLASS##Info::KeyTy(UNWRAP_ARGS(ARGS))))         \
 160         return N;                                                              \
 161       if (!ShouldCreate)                                                       \
 162         return nullptr;                                                        \
 163     } else {                                                                   \
 164       assert(ShouldCreate &&                                                   \
 165              "Expected non-uniqued nodes to always be created");               \
 166     }                                                                          \
 167   } while (false)
 168 #define DEFINE_GETIMPL_STORE(CLASS, ARGS, OPS)                                 \
 169   return storeImpl(new (ArrayRef<Metadata *>(OPS).size())                      \
 170                        CLASS(Context, Storage, UNWRAP_ARGS(ARGS), OPS),        \
 171                    Storage, Context.pImpl->CLASS##s)
 172 #define DEFINE_GETIMPL_STORE_NO_OPS(CLASS, ARGS)                               \
 173   return storeImpl(new (0u) CLASS(Context, Storage, UNWRAP_ARGS(ARGS)),        \
 174                    Storage, Context.pImpl->CLASS##s)
 175 #define DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(CLASS, OPS)                   \
 176   return storeImpl(new (ArrayRef<Metadata *>(OPS).size())                      \
 177                        CLASS(Context, Storage, OPS),                           \
 178                    Storage, Context.pImpl->CLASS##s)
 179
 180 MDSubrange *MDSubrange::getImpl(LLVMContext &Context, int64_t Count, int64_t Lo,
 181                                 StorageType Storage, bool ShouldCreate) {
 182   DEFINE_GETIMPL_LOOKUP(MDSubrange, (Count, Lo));
 183   DEFINE_GETIMPL_STORE_NO_OPS(MDSubrange, (Count, Lo));
 184 }
 185
 186 MDEnumerator *MDEnumerator::getImpl(LLVMContext &Context, int64_t Value,
 187                                     MDString *Name, StorageType Storage,
 188                                     bool ShouldCreate) {
 189   assert(isCanonical(Name) && "Expected canonical MDString");
 190   DEFINE_GETIMPL_LOOKUP(MDEnumerator, (Value, getString(Name)));
 191   Metadata *Ops[] = {Name};
 192   DEFINE_GETIMPL_STORE(MDEnumerator, (Value), Ops);
 193 }
 194
 195 MDBasicType *MDBasicType::getImpl(LLVMContext &Context, unsigned Tag,
 196                                   MDString *Name, uint64_t SizeInBits,
 197                                   uint64_t AlignInBits, unsigned Encoding,
 198                                   StorageType Storage, bool ShouldCreate) {
 199   assert(isCanonical(Name) && "Expected canonical MDString");
 200   DEFINE_GETIMPL_LOOKUP(
 201       MDBasicType, (Tag, getString(Name), SizeInBits, AlignInBits, Encoding));
 202   Metadata *Ops[] = {nullptr, nullptr, Name};
 203   DEFINE_GETIMPL_STORE(MDBasicType, (Tag, SizeInBits, AlignInBits, Encoding),
 204                        Ops);
 205 }
 206
 207 MDDerivedType *MDDerivedType::getImpl(
 208     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
 209     unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
 210     uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
 211     Metadata *ExtraData, StorageType Storage, bool ShouldCreate) {
 212   assert(isCanonical(Name) && "Expected canonical MDString");
 213   DEFINE_GETIMPL_LOOKUP(MDDerivedType, (Tag, getString(Name), File, Line, Scope,
 214                                         BaseType, SizeInBits, AlignInBits,
 215                                         OffsetInBits, Flags, ExtraData));
 216   Metadata *Ops[] = {File, Scope, Name, BaseType, ExtraData};
 217   DEFINE_GETIMPL_STORE(
 218       MDDerivedType, (Tag, Line, SizeInBits, AlignInBits, OffsetInBits, Flags),
 219       Ops);
 220 }
 221
 222 MDCompositeType *MDCompositeType::getImpl(
 223     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
 224     unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
 225     uint64_t AlignInBits, uint64_t OffsetInBits, unsigned Flags,
 226     Metadata *Elements, unsigned RuntimeLang, Metadata *VTableHolder,
 227     Metadata *TemplateParams, MDString *Identifier, StorageType Storage,
 228     bool ShouldCreate) {
 229   assert(isCanonical(Name) && "Expected canonical MDString");
 230   DEFINE_GETIMPL_LOOKUP(MDCompositeType,
 231                         (Tag, getString(Name), File, Line, Scope, BaseType,
 232                          SizeInBits, AlignInBits, OffsetInBits, Flags, Elements,
 233                          RuntimeLang, VTableHolder, TemplateParams,
 234                          getString(Identifier)));
 235   Metadata *Ops[] = {File,     Scope,        Name,           BaseType,
 236                      Elements, VTableHolder, TemplateParams, Identifier};
 237   DEFINE_GETIMPL_STORE(MDCompositeType, (Tag, Line, RuntimeLang, SizeInBits,
 238                                          AlignInBits, OffsetInBits, Flags),
 239                        Ops);
 240 }
 241
 242 MDSubroutineType *MDSubroutineType::getImpl(LLVMContext &Context,
 243                                             unsigned Flags, Metadata *TypeArray,
 244                                             StorageType Storage,
 245                                             bool ShouldCreate) {
 246   DEFINE_GETIMPL_LOOKUP(MDSubroutineType, (Flags, TypeArray));
 247   Metadata *Ops[] = {nullptr,   nullptr, nullptr, nullptr,
 248                      TypeArray, nullptr, nullptr, nullptr};
 249   DEFINE_GETIMPL_STORE(MDSubroutineType, (Flags), Ops);
 250 }
 251
 252 MDFile *MDFile::getImpl(LLVMContext &Context, MDString *Filename,
 253                         MDString *Directory, StorageType Storage,
 254                         bool ShouldCreate) {
 255   assert(isCanonical(Filename) && "Expected canonical MDString");
 256   assert(isCanonical(Directory) && "Expected canonical MDString");
 257   DEFINE_GETIMPL_LOOKUP(MDFile, (getString(Filename), getString(Directory)));
 258   Metadata *Ops[] = {Filename, Directory};
 259   DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(MDFile, Ops);
 260 }
 261
 262 MDCompileUnit *MDCompileUnit::getImpl(
 263     LLVMContext &Context, unsigned SourceLanguage, Metadata *File,
 264     MDString *Producer, bool IsOptimized, MDString *Flags,
 265     unsigned RuntimeVersion, MDString *SplitDebugFilename,
 266     unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
 267     Metadata *Subprograms, Metadata *GlobalVariables,
 268     Metadata *ImportedEntities, StorageType Storage, bool ShouldCreate) {
 269   assert(isCanonical(Producer) && "Expected canonical MDString");
 270   assert(isCanonical(Flags) && "Expected canonical MDString");
 271   assert(isCanonical(SplitDebugFilename) && "Expected canonical MDString");
 272   DEFINE_GETIMPL_LOOKUP(
 273       MDCompileUnit,
 274       (SourceLanguage, File, getString(Producer), IsOptimized, getString(Flags),
 275        RuntimeVersion, getString(SplitDebugFilename), EmissionKind, EnumTypes,
 276        RetainedTypes, Subprograms, GlobalVariables, ImportedEntities));
 277   Metadata *Ops[] = {File, Producer, Flags, SplitDebugFilename, EnumTypes,
 278                      RetainedTypes, Subprograms, GlobalVariables,
 279                      ImportedEntities};
 280   DEFINE_GETIMPL_STORE(
 281       MDCompileUnit,
 282       (SourceLanguage, IsOptimized, RuntimeVersion, EmissionKind), Ops);
 283 }
 284
 285 MDSubprogram *MDLocalScope::getSubprogram() const {
 286   if (auto *Block = dyn_cast<MDLexicalBlockBase>(this))
 287     return Block->getScope()->getSubprogram();
 288   return const_cast<MDSubprogram *>(cast<MDSubprogram>(this));
 289 }
 290
 291 MDSubprogram *MDSubprogram::getImpl(
 292     LLVMContext &Context, Metadata *Scope, MDString *Name,
 293     MDString *LinkageName, Metadata *File, unsigned Line, Metadata *Type,
 294     bool IsLocalToUnit, bool IsDefinition, unsigned ScopeLine,
 295     Metadata *ContainingType, unsigned Virtuality, unsigned VirtualIndex,
 296     unsigned Flags, bool IsOptimized, Metadata *Function,
 297     Metadata *TemplateParams, Metadata *Declaration, Metadata *Variables,
 298     StorageType Storage, bool ShouldCreate) {
 299   assert(isCanonical(Name) && "Expected canonical MDString");
 300   assert(isCanonical(LinkageName) && "Expected canonical MDString");
 301   DEFINE_GETIMPL_LOOKUP(MDSubprogram,
 302                         (Scope, getString(Name), getString(LinkageName), File,
 303                          Line, Type, IsLocalToUnit, IsDefinition, ScopeLine,
 304                          ContainingType, Virtuality, VirtualIndex, Flags,
 305                          IsOptimized, Function, TemplateParams, Declaration,
 306                          Variables));
 307   Metadata *Ops[] = {File,           Scope,       Name,           Name,
 308                      LinkageName,    Type,        ContainingType, Function,
 309                      TemplateParams, Declaration, Variables};
 310   DEFINE_GETIMPL_STORE(MDSubprogram,
 311                        (Line, ScopeLine, Virtuality, VirtualIndex, Flags,
 312                         IsLocalToUnit, IsDefinition, IsOptimized),
 313                        Ops);
 314 }
 315
 316 void MDSubprogram::replaceFunction(Function *F) {
 317   replaceFunction(F ? ConstantAsMetadata::get(F)
 318                     : static_cast<ConstantAsMetadata *>(nullptr));
 319 }
 320
 321 MDLexicalBlock *MDLexicalBlock::getImpl(LLVMContext &Context, Metadata *Scope,
 322                                         Metadata *File, unsigned Line,
 323                                         unsigned Column, StorageType Storage,
 324                                         bool ShouldCreate) {
 325   assert(Scope && "Expected scope");
 326   DEFINE_GETIMPL_LOOKUP(MDLexicalBlock, (Scope, File, Line, Column));
 327   Metadata *Ops[] = {File, Scope};
 328   DEFINE_GETIMPL_STORE(MDLexicalBlock, (Line, Column), Ops);
 329 }
 330
 331 MDLexicalBlockFile *MDLexicalBlockFile::getImpl(LLVMContext &Context,
 332                                                 Metadata *Scope, Metadata *File,
 333                                                 unsigned Discriminator,
 334                                                 StorageType Storage,
 335                                                 bool ShouldCreate) {
 336   assert(Scope && "Expected scope");
 337   DEFINE_GETIMPL_LOOKUP(MDLexicalBlockFile, (Scope, File, Discriminator));
 338   Metadata *Ops[] = {File, Scope};
 339   DEFINE_GETIMPL_STORE(MDLexicalBlockFile, (Discriminator), Ops);
 340 }
 341
 342 MDNamespace *MDNamespace::getImpl(LLVMContext &Context, Metadata *Scope,
 343                                   Metadata *File, MDString *Name, unsigned Line,
 344                                   StorageType Storage, bool ShouldCreate) {
 345   assert(isCanonical(Name) && "Expected canonical MDString");
 346   DEFINE_GETIMPL_LOOKUP(MDNamespace, (Scope, File, getString(Name), Line));
 347   Metadata *Ops[] = {File, Scope, Name};
 348   DEFINE_GETIMPL_STORE(MDNamespace, (Line), Ops);
 349 }
 350
 351 MDTemplateTypeParameter *MDTemplateTypeParameter::getImpl(LLVMContext &Context,
 352                                                           MDString *Name,
 353                                                           Metadata *Type,
 354                                                           StorageType Storage,
 355                                                           bool ShouldCreate) {
 356   assert(isCanonical(Name) && "Expected canonical MDString");
 357   DEFINE_GETIMPL_LOOKUP(MDTemplateTypeParameter, (getString(Name), Type));
 358   Metadata *Ops[] = {Name, Type};
 359   DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(MDTemplateTypeParameter, Ops);
 360 }
 361
 362 MDTemplateValueParameter *MDTemplateValueParameter::getImpl(
 363     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *Type,
 364     Metadata *Value, StorageType Storage, bool ShouldCreate) {
 365   assert(isCanonical(Name) && "Expected canonical MDString");
 366   DEFINE_GETIMPL_LOOKUP(MDTemplateValueParameter,
 367                         (Tag, getString(Name), Type, Value));
 368   Metadata *Ops[] = {Name, Type, Value};
 369   DEFINE_GETIMPL_STORE(MDTemplateValueParameter, (Tag), Ops);
 370 }
 371
 372 MDGlobalVariable *
 373 MDGlobalVariable::getImpl(LLVMContext &Context, Metadata *Scope, MDString *Name,
 374                           MDString *LinkageName, Metadata *File, unsigned Line,
 375                           Metadata *Type, bool IsLocalToUnit, bool IsDefinition,
 376                           Metadata *Variable,
 377                           Metadata *StaticDataMemberDeclaration,
 378                           StorageType Storage, bool ShouldCreate) {
 379   assert(isCanonical(Name) && "Expected canonical MDString");
 380   assert(isCanonical(LinkageName) && "Expected canonical MDString");
 381   DEFINE_GETIMPL_LOOKUP(MDGlobalVariable,
 382                         (Scope, getString(Name), getString(LinkageName), File,
 383                          Line, Type, IsLocalToUnit, IsDefinition, Variable,
 384                          StaticDataMemberDeclaration));
 385   Metadata *Ops[] = {Scope, Name,        File,     Type,
 386                      Name,  LinkageName, Variable, StaticDataMemberDeclaration};
 387   DEFINE_GETIMPL_STORE(MDGlobalVariable, (Line, IsLocalToUnit, IsDefinition),
 388                        Ops);
 389 }
 390
 391 MDLocalVariable *MDLocalVariable::getImpl(
 392     LLVMContext &Context, unsigned Tag, Metadata *Scope, MDString *Name,
 393     Metadata *File, unsigned Line, Metadata *Type, unsigned Arg, unsigned Flags,
 394     Metadata *InlinedAt, StorageType Storage, bool ShouldCreate) {
 395   // Truncate Arg to 8 bits.
 396   //
 397   // FIXME: This is gross (and should be changed to an assert or removed), but
 398   // it matches historical behaviour for now.
 399   Arg &= (1u << 8) - 1;
 400
 401   assert(Scope && "Expected scope");
 402   assert(isCanonical(Name) && "Expected canonical MDString");
 403   DEFINE_GETIMPL_LOOKUP(MDLocalVariable, (Tag, Scope, getString(Name), File,
 404                                           Line, Type, Arg, Flags, InlinedAt));
 405   Metadata *Ops[] = {Scope, Name, File, Type, InlinedAt};
 406   DEFINE_GETIMPL_STORE(MDLocalVariable, (Tag, Line, Arg, Flags), Ops);
 407 }
 408
 409 MDExpression *MDExpression::getImpl(LLVMContext &Context,
 410                                     ArrayRef<uint64_t> Elements,
 411                                     StorageType Storage, bool ShouldCreate) {
 412   DEFINE_GETIMPL_LOOKUP(MDExpression, (Elements));
 413   DEFINE_GETIMPL_STORE_NO_OPS(MDExpression, (Elements));
 414 }
 415
 416 unsigned MDExpression::ExprOperand::getSize() const {
 417   switch (getOp()) {
 418   case dwarf::DW_OP_bit_piece:
 419     return 3;
 420   case dwarf::DW_OP_plus:
 421     return 2;
 422   default:
 423     return 1;
 424   }
 425 }
 426
 427 bool MDExpression::isValid() const {
 428   for (auto I = expr_op_begin(), E = expr_op_end(); I != E; ++I) {
 429     // Check that there's space for the operand.
 430     if (I->get() + I->getSize() > E->get())
 431       return false;
 432
 433     // Check that the operand is valid.
 434     switch (I->getOp()) {
 435     default:
 436       return false;
 437     case dwarf::DW_OP_bit_piece:
 438       // Piece expressions must be at the end.
 439       return I->get() + I->getSize() == E->get();
 440     case dwarf::DW_OP_plus:
 441     case dwarf::DW_OP_deref:
 442       break;
 443     }
 444   }
 445   return true;
 446 }
 447
 448 MDObjCProperty *MDObjCProperty::getImpl(
 449     LLVMContext &Context, MDString *Name, Metadata *File, unsigned Line,
 450     MDString *GetterName, MDString *SetterName, unsigned Attributes,
 451     Metadata *Type, StorageType Storage, bool ShouldCreate) {
 452   assert(isCanonical(Name) && "Expected canonical MDString");
 453   assert(isCanonical(GetterName) && "Expected canonical MDString");
 454   assert(isCanonical(SetterName) && "Expected canonical MDString");
 455   DEFINE_GETIMPL_LOOKUP(MDObjCProperty,
 456                         (getString(Name), File, Line, getString(GetterName),
 457                          getString(SetterName), Attributes, Type));
 458   Metadata *Ops[] = {Name, File, GetterName, SetterName, Type};
 459   DEFINE_GETIMPL_STORE(MDObjCProperty, (Line, Attributes), Ops);
 460 }
 461
 462 MDImportedEntity *MDImportedEntity::getImpl(LLVMContext &Context, unsigned Tag,
 463                                             Metadata *Scope, Metadata *Entity,
 464                                             unsigned Line, MDString *Name,
 465                                             StorageType Storage,
 466                                             bool ShouldCreate) {
 467   assert(isCanonical(Name) && "Expected canonical MDString");
 468   DEFINE_GETIMPL_LOOKUP(MDImportedEntity,
 469                         (Tag, Scope, Entity, Line, getString(Name)));
 470   Metadata *Ops[] = {Scope, Entity, Name};
 471   DEFINE_GETIMPL_STORE(MDImportedEntity, (Tag, Line), Ops);
 472 }