LCOV - code coverage report
Current view: top level - lib/IR - DebugInfoMetadata.cpp (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 308 317 97.2 %
Date: 2018-07-13 00:08:38 Functions: 57 57 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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/SmallPtrSet.h"
      18             : #include "llvm/ADT/StringSwitch.h"
      19             : #include "llvm/IR/DIBuilder.h"
      20             : #include "llvm/IR/Function.h"
      21             : #include "llvm/IR/Instructions.h"
      22             : 
      23             : using namespace llvm;
      24             : 
      25     1324962 : DILocation::DILocation(LLVMContext &C, StorageType Storage, unsigned Line,
      26     1324962 :                        unsigned Column, ArrayRef<Metadata *> MDs)
      27     2649924 :     : MDNode(C, DILocationKind, Storage, MDs) {
      28             :   assert((MDs.size() == 1 || MDs.size() == 2) &&
      29             :          "Expected a scope and optional inlined-at");
      30             : 
      31             :   // Set line and column.
      32             :   assert(Column < (1u << 16) && "Expected 16-bit column");
      33             : 
      34     1324962 :   SubclassData32 = Line;
      35     1324962 :   SubclassData16 = Column;
      36     1324962 : }
      37             : 
      38             : static void adjustColumn(unsigned &Column) {
      39             :   // Set to unknown on overflow.  We only have 16 bits to play with here.
      40     3310591 :   if (Column >= (1u << 16))
      41             :     Column = 0;
      42             : }
      43             : 
      44     3286121 : DILocation *DILocation::getImpl(LLVMContext &Context, unsigned Line,
      45             :                                 unsigned Column, Metadata *Scope,
      46             :                                 Metadata *InlinedAt, StorageType Storage,
      47             :                                 bool ShouldCreate) {
      48             :   // Fixup column.
      49             :   adjustColumn(Column);
      50             : 
      51     3286121 :   if (Storage == Uniqued) {
      52     1961159 :     if (auto *N =
      53     3123319 :             getUniqued(Context.pImpl->DILocations,
      54     6246638 :                        DILocationInfo::KeyTy(Line, Column, Scope, InlinedAt)))
      55             :       return N;
      56     1162160 :     if (!ShouldCreate)
      57             :       return nullptr;
      58             :   } else {
      59             :     assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
      60             :   }
      61             : 
      62             :   SmallVector<Metadata *, 2> Ops;
      63     1324962 :   Ops.push_back(Scope);
      64     1324962 :   if (InlinedAt)
      65      498304 :     Ops.push_back(InlinedAt);
      66     3974886 :   return storeImpl(new (Ops.size())
      67     1324962 :                        DILocation(Context, Storage, Line, Column, Ops),
      68     2649924 :                    Storage, Context.pImpl->DILocations);
      69             : }
      70             : 
      71      149359 : const DILocation *DILocation::getMergedLocation(const DILocation *LocA,
      72             :                                                 const DILocation *LocB,
      73             :                                                 bool GenerateLocation) {
      74      149359 :   if (!LocA || !LocB)
      75             :     return nullptr;
      76             : 
      77      107969 :   if (LocA == LocB || !LocA->canDiscriminate(*LocB))
      78             :     return LocA;
      79             : 
      80       13255 :   if (!GenerateLocation)
      81             :     return nullptr;
      82             : 
      83             :   SmallPtrSet<DILocation *, 5> InlinedLocationsA;
      84        6997 :   for (DILocation *L = LocA->getInlinedAt(); L; L = L->getInlinedAt())
      85         795 :     InlinedLocationsA.insert(L);
      86             :   const DILocation *Result = LocB;
      87        7839 :   for (DILocation *L = LocB->getInlinedAt(); L; L = L->getInlinedAt()) {
      88             :     Result = L;
      89        1106 :     if (InlinedLocationsA.count(L))
      90             :       break;
      91             :   }
      92             :   return DILocation::get(Result->getContext(), 0, 0, Result->getScope(),
      93             :                          Result->getInlinedAt());
      94             : }
      95             : 
      96        3522 : DINode::DIFlags DINode::getFlag(StringRef Flag) {
      97        3522 :   return StringSwitch<DIFlags>(Flag)
      98             : #define HANDLE_DI_FLAG(ID, NAME) .Case("DIFlag" #NAME, Flag##NAME)
      99             : #include "llvm/IR/DebugInfoFlags.def"
     100        3522 :       .Default(DINode::FlagZero);
     101             : }
     102             : 
     103        9122 : StringRef DINode::getFlagString(DIFlags Flag) {
     104        9122 :   switch (Flag) {
     105             : #define HANDLE_DI_FLAG(ID, NAME)                                               \
     106             :   case Flag##NAME:                                                             \
     107             :     return "DIFlag" #NAME;
     108             : #include "llvm/IR/DebugInfoFlags.def"
     109             :   }
     110           3 :   return "";
     111             : }
     112             : 
     113        7266 : DINode::DIFlags DINode::splitFlags(DIFlags Flags,
     114             :                                    SmallVectorImpl<DIFlags> &SplitFlags) {
     115             :   // Flags that are packed together need to be specially handled, so
     116             :   // that, for example, we emit "DIFlagPublic" and not
     117             :   // "DIFlagPrivate | DIFlagProtected".
     118        7266 :   if (DIFlags A = Flags & FlagAccessibility) {
     119         492 :     if (A == FlagPrivate)
     120          39 :       SplitFlags.push_back(FlagPrivate);
     121         453 :     else if (A == FlagProtected)
     122          65 :       SplitFlags.push_back(FlagProtected);
     123             :     else
     124         388 :       SplitFlags.push_back(FlagPublic);
     125             :     Flags &= ~A;
     126             :   }
     127        7266 :   if (DIFlags R = Flags & FlagPtrToMemberRep) {
     128          14 :     if (R == FlagSingleInheritance)
     129          10 :       SplitFlags.push_back(FlagSingleInheritance);
     130           4 :     else if (R == FlagMultipleInheritance)
     131           2 :       SplitFlags.push_back(FlagMultipleInheritance);
     132             :     else
     133           2 :       SplitFlags.push_back(FlagVirtualInheritance);
     134             :     Flags &= ~R;
     135             :   }
     136        7266 :   if ((Flags & FlagIndirectVirtualBase) == FlagIndirectVirtualBase) {
     137             :     Flags &= ~FlagIndirectVirtualBase;
     138           1 :     SplitFlags.push_back(FlagIndirectVirtualBase);
     139             :   }
     140             : 
     141             : #define HANDLE_DI_FLAG(ID, NAME)                                               \
     142             :   if (DIFlags Bit = Flags & Flag##NAME) {                                      \
     143             :     SplitFlags.push_back(Bit);                                                 \
     144             :     Flags &= ~Bit;                                                             \
     145             :   }
     146             : #include "llvm/IR/DebugInfoFlags.def"
     147        7266 :   return Flags;
     148             : }
     149             : 
     150      120225 : DIScopeRef DIScope::getScope() const {
     151             :   if (auto *T = dyn_cast<DIType>(this))
     152             :     return T->getScope();
     153             : 
     154             :   if (auto *SP = dyn_cast<DISubprogram>(this))
     155             :     return SP->getScope();
     156             : 
     157             :   if (auto *LB = dyn_cast<DILexicalBlockBase>(this))
     158        8690 :     return LB->getScope();
     159             : 
     160             :   if (auto *NS = dyn_cast<DINamespace>(this))
     161       62454 :     return NS->getScope();
     162             : 
     163             :   if (auto *M = dyn_cast<DIModule>(this))
     164          12 :     return M->getScope();
     165             : 
     166             :   assert((isa<DIFile>(this) || isa<DICompileUnit>(this)) &&
     167             :          "Unhandled type of scope.");
     168        3639 :   return nullptr;
     169             : }
     170             : 
     171       85696 : StringRef DIScope::getName() const {
     172             :   if (auto *T = dyn_cast<DIType>(this))
     173             :     return T->getName();
     174             :   if (auto *SP = dyn_cast<DISubprogram>(this))
     175             :     return SP->getName();
     176             :   if (auto *NS = dyn_cast<DINamespace>(this))
     177             :     return NS->getName();
     178             :   if (auto *M = dyn_cast<DIModule>(this))
     179             :     return M->getName();
     180             :   assert((isa<DILexicalBlockBase>(this) || isa<DIFile>(this) ||
     181             :           isa<DICompileUnit>(this)) &&
     182             :          "Unhandled type of scope.");
     183        3651 :   return "";
     184             : }
     185             : 
     186             : #ifndef NDEBUG
     187             : static bool isCanonical(const MDString *S) {
     188             :   return !S || !S->getString().empty();
     189             : }
     190             : #endif
     191             : 
     192          61 : GenericDINode *GenericDINode::getImpl(LLVMContext &Context, unsigned Tag,
     193             :                                       MDString *Header,
     194             :                                       ArrayRef<Metadata *> DwarfOps,
     195             :                                       StorageType Storage, bool ShouldCreate) {
     196             :   unsigned Hash = 0;
     197          61 :   if (Storage == Uniqued) {
     198             :     GenericDINodeInfo::KeyTy Key(Tag, Header, DwarfOps);
     199          62 :     if (auto *N = getUniqued(Context.pImpl->GenericDINodes, Key))
     200          13 :       return N;
     201          36 :     if (!ShouldCreate)
     202             :       return nullptr;
     203          36 :     Hash = Key.getHash();
     204             :   } else {
     205             :     assert(ShouldCreate && "Expected non-uniqued nodes to always be created");
     206             :   }
     207             : 
     208             :   // Use a nullptr for empty headers.
     209             :   assert(isCanonical(Header) && "Expected canonical MDString");
     210          48 :   Metadata *PreOps[] = {Header};
     211          48 :   return storeImpl(new (DwarfOps.size() + 1) GenericDINode(
     212          48 :                        Context, Storage, Hash, Tag, PreOps, DwarfOps),
     213          96 :                    Storage, Context.pImpl->GenericDINodes);
     214             : }
     215             : 
     216          15 : void GenericDINode::recalculateHash() {
     217             :   setHash(GenericDINodeInfo::KeyTy::calculateHash(this));
     218          15 : }
     219             : 
     220             : #define UNWRAP_ARGS_IMPL(...) __VA_ARGS__
     221             : #define UNWRAP_ARGS(ARGS) UNWRAP_ARGS_IMPL ARGS
     222             : #define DEFINE_GETIMPL_LOOKUP(CLASS, ARGS)                                     \
     223             :   do {                                                                         \
     224             :     if (Storage == Uniqued) {                                                  \
     225             :       if (auto *N = getUniqued(Context.pImpl->CLASS##s,                        \
     226             :                                CLASS##Info::KeyTy(UNWRAP_ARGS(ARGS))))         \
     227             :         return N;                                                              \
     228             :       if (!ShouldCreate)                                                       \
     229             :         return nullptr;                                                        \
     230             :     } else {                                                                   \
     231             :       assert(ShouldCreate &&                                                   \
     232             :              "Expected non-uniqued nodes to always be created");               \
     233             :     }                                                                          \
     234             :   } while (false)
     235             : #define DEFINE_GETIMPL_STORE(CLASS, ARGS, OPS)                                 \
     236             :   return storeImpl(new (array_lengthof(OPS))                                   \
     237             :                        CLASS(Context, Storage, UNWRAP_ARGS(ARGS), OPS),        \
     238             :                    Storage, Context.pImpl->CLASS##s)
     239             : #define DEFINE_GETIMPL_STORE_NO_OPS(CLASS, ARGS)                               \
     240             :   return storeImpl(new (0u) CLASS(Context, Storage, UNWRAP_ARGS(ARGS)),        \
     241             :                    Storage, Context.pImpl->CLASS##s)
     242             : #define DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(CLASS, OPS)                   \
     243             :   return storeImpl(new (array_lengthof(OPS)) CLASS(Context, Storage, OPS),     \
     244             :                    Storage, Context.pImpl->CLASS##s)
     245             : #define DEFINE_GETIMPL_STORE_N(CLASS, ARGS, OPS, NUM_OPS)                      \
     246             :   return storeImpl(new (NUM_OPS)                                               \
     247             :                        CLASS(Context, Storage, UNWRAP_ARGS(ARGS), OPS),        \
     248             :                    Storage, Context.pImpl->CLASS##s)
     249             : 
     250        3551 : DISubrange *DISubrange::getImpl(LLVMContext &Context, int64_t Count, int64_t Lo,
     251             :                                 StorageType Storage, bool ShouldCreate) {
     252             :   auto *CountNode = ConstantAsMetadata::get(
     253        3551 :       ConstantInt::getSigned(Type::getInt64Ty(Context), Count));
     254        3551 :   return getImpl(Context, CountNode, Lo, Storage, ShouldCreate);
     255             : }
     256             : 
     257        3631 : DISubrange *DISubrange::getImpl(LLVMContext &Context, Metadata *CountNode,
     258             :                                 int64_t Lo, StorageType Storage,
     259             :                                 bool ShouldCreate) {
     260       10891 :   DEFINE_GETIMPL_LOOKUP(DISubrange, (CountNode, Lo));
     261        3100 :   Metadata *Ops[] = { CountNode };
     262        6200 :   DEFINE_GETIMPL_STORE(DISubrange, (CountNode, Lo), Ops);
     263             : }
     264             : 
     265       17800 : DIEnumerator *DIEnumerator::getImpl(LLVMContext &Context, int64_t Value,
     266             :                                     bool IsUnsigned, MDString *Name,
     267             :                                     StorageType Storage, bool ShouldCreate) {
     268             :   assert(isCanonical(Name) && "Expected canonical MDString");
     269       53398 :   DEFINE_GETIMPL_LOOKUP(DIEnumerator, (Value, IsUnsigned, Name));
     270       17789 :   Metadata *Ops[] = {Name};
     271       35578 :   DEFINE_GETIMPL_STORE(DIEnumerator, (Value, IsUnsigned), Ops);
     272             : }
     273             : 
     274       12238 : DIBasicType *DIBasicType::getImpl(LLVMContext &Context, unsigned Tag,
     275             :                                   MDString *Name, uint64_t SizeInBits,
     276             :                                   uint32_t AlignInBits, unsigned Encoding,
     277             :                                   StorageType Storage, bool ShouldCreate) {
     278             :   assert(isCanonical(Name) && "Expected canonical MDString");
     279       36710 :   DEFINE_GETIMPL_LOOKUP(DIBasicType,
     280             :                         (Tag, Name, SizeInBits, AlignInBits, Encoding));
     281       11852 :   Metadata *Ops[] = {nullptr, nullptr, Name};
     282       23704 :   DEFINE_GETIMPL_STORE(DIBasicType, (Tag, SizeInBits, AlignInBits, Encoding),
     283             :                        Ops);
     284             : }
     285             : 
     286         387 : Optional<DIBasicType::Signedness> DIBasicType::getSignedness() const {
     287         387 :   switch (getEncoding()) {
     288           9 :   case dwarf::DW_ATE_signed:
     289             :   case dwarf::DW_ATE_signed_char:
     290             :     return Signedness::Signed;
     291         377 :   case dwarf::DW_ATE_unsigned:
     292             :   case dwarf::DW_ATE_unsigned_char:
     293             :     return Signedness::Unsigned;
     294             :   default:
     295             :     return None;
     296             :   }
     297             : }
     298             : 
     299      551875 : DIDerivedType *DIDerivedType::getImpl(
     300             :     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
     301             :     unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
     302             :     uint32_t AlignInBits, uint64_t OffsetInBits,
     303             :     Optional<unsigned> DWARFAddressSpace, DIFlags Flags, Metadata *ExtraData,
     304             :     StorageType Storage, bool ShouldCreate) {
     305             :   assert(isCanonical(Name) && "Expected canonical MDString");
     306     1300349 :   DEFINE_GETIMPL_LOOKUP(DIDerivedType,
     307             :                         (Tag, Name, File, Line, Scope, BaseType, SizeInBits,
     308             :                          AlignInBits, OffsetInBits, DWARFAddressSpace, Flags,
     309             :                          ExtraData));
     310      410341 :   Metadata *Ops[] = {File, Scope, Name, BaseType, ExtraData};
     311     1231023 :   DEFINE_GETIMPL_STORE(
     312             :       DIDerivedType, (Tag, Line, SizeInBits, AlignInBits, OffsetInBits,
     313             :                       DWARFAddressSpace, Flags), Ops);
     314             : }
     315             : 
     316       43629 : DICompositeType *DICompositeType::getImpl(
     317             :     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *File,
     318             :     unsigned Line, Metadata *Scope, Metadata *BaseType, uint64_t SizeInBits,
     319             :     uint32_t AlignInBits, uint64_t OffsetInBits, DIFlags Flags,
     320             :     Metadata *Elements, unsigned RuntimeLang, Metadata *VTableHolder,
     321             :     Metadata *TemplateParams, MDString *Identifier, Metadata *Discriminator,
     322             :     StorageType Storage, bool ShouldCreate) {
     323             :   assert(isCanonical(Name) && "Expected canonical MDString");
     324             : 
     325             :   // Keep this in sync with buildODRType.
     326       55195 :   DEFINE_GETIMPL_LOOKUP(
     327             :       DICompositeType, (Tag, Name, File, Line, Scope, BaseType, SizeInBits,
     328             :                         AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang,
     329             :                         VTableHolder, TemplateParams, Identifier, Discriminator));
     330             :   Metadata *Ops[] = {File,     Scope,        Name,           BaseType,
     331             :                      Elements, VTableHolder, TemplateParams, Identifier,
     332       43528 :                      Discriminator};
     333       87056 :   DEFINE_GETIMPL_STORE(DICompositeType, (Tag, Line, RuntimeLang, SizeInBits,
     334             :                                          AlignInBits, OffsetInBits, Flags),
     335             :                        Ops);
     336             : }
     337             : 
     338         620 : DICompositeType *DICompositeType::buildODRType(
     339             :     LLVMContext &Context, MDString &Identifier, unsigned Tag, MDString *Name,
     340             :     Metadata *File, unsigned Line, Metadata *Scope, Metadata *BaseType,
     341             :     uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
     342             :     DIFlags Flags, Metadata *Elements, unsigned RuntimeLang,
     343             :     Metadata *VTableHolder, Metadata *TemplateParams, Metadata *Discriminator) {
     344             :   assert(!Identifier.getString().empty() && "Expected valid identifier");
     345         620 :   if (!Context.isODRUniquingDebugTypes())
     346             :     return nullptr;
     347         322 :   auto *&CT = (*Context.pImpl->DITypeMap)[&Identifier];
     348         161 :   if (!CT)
     349         122 :     return CT = DICompositeType::getDistinct(
     350             :                Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
     351             :                AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang,
     352         122 :                VTableHolder, TemplateParams, &Identifier, Discriminator);
     353             : 
     354             :   // Only mutate CT if it's a forward declaration and the new operands aren't.
     355             :   assert(CT->getRawIdentifier() == &Identifier && "Wrong ODR identifier?");
     356          51 :   if (!CT->isForwardDecl() || (Flags & DINode::FlagFwdDecl))
     357             :     return CT;
     358             : 
     359             :   // Mutate CT in place.  Keep this in sync with getImpl.
     360             :   CT->mutate(Tag, Line, RuntimeLang, SizeInBits, AlignInBits, OffsetInBits,
     361             :              Flags);
     362             :   Metadata *Ops[] = {File,     Scope,        Name,           BaseType,
     363             :                      Elements, VTableHolder, TemplateParams, &Identifier,
     364           5 :                      Discriminator};
     365             :   assert((std::end(Ops) - std::begin(Ops)) == (int)CT->getNumOperands() &&
     366             :          "Mismatched number of operands");
     367          50 :   for (unsigned I = 0, E = CT->getNumOperands(); I != E; ++I)
     368          90 :     if (Ops[I] != CT->getOperand(I))
     369          11 :       CT->setOperand(I, Ops[I]);
     370           5 :   return CT;
     371             : }
     372             : 
     373           4 : DICompositeType *DICompositeType::getODRType(
     374             :     LLVMContext &Context, MDString &Identifier, unsigned Tag, MDString *Name,
     375             :     Metadata *File, unsigned Line, Metadata *Scope, Metadata *BaseType,
     376             :     uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
     377             :     DIFlags Flags, Metadata *Elements, unsigned RuntimeLang,
     378             :     Metadata *VTableHolder, Metadata *TemplateParams, Metadata *Discriminator) {
     379             :   assert(!Identifier.getString().empty() && "Expected valid identifier");
     380           4 :   if (!Context.isODRUniquingDebugTypes())
     381             :     return nullptr;
     382           6 :   auto *&CT = (*Context.pImpl->DITypeMap)[&Identifier];
     383           3 :   if (!CT)
     384           1 :     CT = DICompositeType::getDistinct(
     385             :         Context, Tag, Name, File, Line, Scope, BaseType, SizeInBits,
     386             :         AlignInBits, OffsetInBits, Flags, Elements, RuntimeLang, VTableHolder,
     387             :         TemplateParams, &Identifier, Discriminator);
     388           3 :   return CT;
     389             : }
     390             : 
     391           5 : DICompositeType *DICompositeType::getODRTypeIfExists(LLVMContext &Context,
     392             :                                                      MDString &Identifier) {
     393             :   assert(!Identifier.getString().empty() && "Expected valid identifier");
     394           5 :   if (!Context.isODRUniquingDebugTypes())
     395             :     return nullptr;
     396           8 :   return Context.pImpl->DITypeMap->lookup(&Identifier);
     397             : }
     398             : 
     399      382962 : DISubroutineType *DISubroutineType::getImpl(LLVMContext &Context, DIFlags Flags,
     400             :                                             uint8_t CC, Metadata *TypeArray,
     401             :                                             StorageType Storage,
     402             :                                             bool ShouldCreate) {
     403     1148868 :   DEFINE_GETIMPL_LOOKUP(DISubroutineType, (Flags, CC, TypeArray));
     404      283875 :   Metadata *Ops[] = {nullptr, nullptr, nullptr, TypeArray};
     405      567750 :   DEFINE_GETIMPL_STORE(DISubroutineType, (Flags, CC), Ops);
     406             : }
     407             : 
     408             : // FIXME: Implement this string-enum correspondence with a .def file and macros,
     409             : // so that the association is explicit rather than implied.
     410             : static const char *ChecksumKindName[DIFile::CSK_Last] = {
     411             :   "CSK_MD5",
     412             :   "CSK_SHA1"
     413             : };
     414             : 
     415          70 : StringRef DIFile::getChecksumKindAsString(ChecksumKind CSKind) {
     416             :   assert(CSKind <= DIFile::CSK_Last && "Invalid checksum kind");
     417             :   // The first space was originally the CSK_None variant, which is now
     418             :   // obsolete, but the space is still reserved in ChecksumKind, so we account
     419             :   // for it here.
     420         140 :   return ChecksumKindName[CSKind - 1];
     421             : }
     422             : 
     423         141 : Optional<DIFile::ChecksumKind> DIFile::getChecksumKind(StringRef CSKindStr) {
     424         141 :   return StringSwitch<Optional<DIFile::ChecksumKind>>(CSKindStr)
     425         141 :       .Case("CSK_MD5", DIFile::CSK_MD5)
     426         141 :       .Case("CSK_SHA1", DIFile::CSK_SHA1)
     427         141 :       .Default(None);
     428             : }
     429             : 
     430       52247 : DIFile *DIFile::getImpl(LLVMContext &Context, MDString *Filename,
     431             :                         MDString *Directory,
     432             :                         Optional<DIFile::ChecksumInfo<MDString *>> CS,
     433             :                         Optional<MDString *> Source, StorageType Storage,
     434             :                         bool ShouldCreate) {
     435             :   assert(isCanonical(Filename) && "Expected canonical MDString");
     436             :   assert(isCanonical(Directory) && "Expected canonical MDString");
     437             :   assert((!CS || isCanonical(CS->Value)) && "Expected canonical MDString");
     438             :   assert((!Source || isCanonical(*Source)) && "Expected canonical MDString");
     439      156667 :   DEFINE_GETIMPL_LOOKUP(DIFile, (Filename, Directory, CS, Source));
     440       27782 :   Metadata *Ops[] = {Filename, Directory, CS ? CS->Value : nullptr,
     441       83346 :                      Source.getValueOr(nullptr)};
     442       55564 :   DEFINE_GETIMPL_STORE(DIFile, (CS, Source), Ops);
     443             : }
     444             : 
     445        5277 : DICompileUnit *DICompileUnit::getImpl(
     446             :     LLVMContext &Context, unsigned SourceLanguage, Metadata *File,
     447             :     MDString *Producer, bool IsOptimized, MDString *Flags,
     448             :     unsigned RuntimeVersion, MDString *SplitDebugFilename,
     449             :     unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
     450             :     Metadata *GlobalVariables, Metadata *ImportedEntities, Metadata *Macros,
     451             :     uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling,
     452             :     bool GnuPubnames, StorageType Storage, bool ShouldCreate) {
     453             :   assert(Storage != Uniqued && "Cannot unique DICompileUnit");
     454             :   assert(isCanonical(Producer) && "Expected canonical MDString");
     455             :   assert(isCanonical(Flags) && "Expected canonical MDString");
     456             :   assert(isCanonical(SplitDebugFilename) && "Expected canonical MDString");
     457             : 
     458             :   Metadata *Ops[] = {
     459             :       File,      Producer,      Flags,           SplitDebugFilename,
     460             :       EnumTypes, RetainedTypes, GlobalVariables, ImportedEntities,
     461        5277 :       Macros};
     462             :   return storeImpl(new (array_lengthof(Ops)) DICompileUnit(
     463             :                        Context, Storage, SourceLanguage, IsOptimized,
     464             :                        RuntimeVersion, EmissionKind, DWOId, SplitDebugInlining,
     465        5277 :                        DebugInfoForProfiling, GnuPubnames, Ops),
     466        5277 :                    Storage);
     467             : }
     468             : 
     469             : Optional<DICompileUnit::DebugEmissionKind>
     470        1809 : DICompileUnit::getEmissionKind(StringRef Str) {
     471        1809 :   return StringSwitch<Optional<DebugEmissionKind>>(Str)
     472        1809 :       .Case("NoDebug", NoDebug)
     473        1809 :       .Case("FullDebug", FullDebug)
     474        1809 :       .Case("LineTablesOnly", LineTablesOnly)
     475        1809 :       .Default(None);
     476             : }
     477             : 
     478        1111 : const char *DICompileUnit::emissionKindString(DebugEmissionKind EK) {
     479        1111 :   switch (EK) {
     480             :   case NoDebug:        return "NoDebug";
     481         797 :   case FullDebug:      return "FullDebug";
     482         196 :   case LineTablesOnly: return "LineTablesOnly";
     483             :   }
     484           0 :   return nullptr;
     485             : }
     486             : 
     487     1577063 : DISubprogram *DILocalScope::getSubprogram() const {
     488             :   if (auto *Block = dyn_cast<DILexicalBlockBase>(this))
     489      105774 :     return Block->getScope()->getSubprogram();
     490             :   return const_cast<DISubprogram *>(cast<DISubprogram>(this));
     491             : }
     492             : 
     493     3552369 : DILocalScope *DILocalScope::getNonLexicalBlockFileScope() const {
     494             :   if (auto *File = dyn_cast<DILexicalBlockFile>(this))
     495         428 :     return File->getScope()->getNonLexicalBlockFileScope();
     496             :   return const_cast<DILocalScope *>(this);
     497             : }
     498             : 
     499      321115 : DISubprogram *DISubprogram::getImpl(
     500             :     LLVMContext &Context, Metadata *Scope, MDString *Name,
     501             :     MDString *LinkageName, Metadata *File, unsigned Line, Metadata *Type,
     502             :     bool IsLocalToUnit, bool IsDefinition, unsigned ScopeLine,
     503             :     Metadata *ContainingType, unsigned Virtuality, unsigned VirtualIndex,
     504             :     int ThisAdjustment, DIFlags Flags, bool IsOptimized, Metadata *Unit,
     505             :     Metadata *TemplateParams, Metadata *Declaration, Metadata *RetainedNodes,
     506             :     Metadata *ThrownTypes, StorageType Storage, bool ShouldCreate) {
     507             :   assert(isCanonical(Name) && "Expected canonical MDString");
     508             :   assert(isCanonical(LinkageName) && "Expected canonical MDString");
     509      675915 :   DEFINE_GETIMPL_LOOKUP(
     510             :       DISubprogram, (Scope, Name, LinkageName, File, Line, Type, IsLocalToUnit,
     511             :                      IsDefinition, ScopeLine, ContainingType, Virtuality,
     512             :                      VirtualIndex, ThisAdjustment, Flags, IsOptimized, Unit,
     513             :                      TemplateParams, Declaration, RetainedNodes, ThrownTypes));
     514             :   SmallVector<Metadata *, 11> Ops = {
     515             :       File,        Scope,         Name,           LinkageName,    Type,       Unit,
     516      642214 :       Declaration, RetainedNodes, ContainingType, TemplateParams, ThrownTypes};
     517      321107 :   if (!ThrownTypes) {
     518             :     Ops.pop_back();
     519      321072 :     if (!TemplateParams) {
     520             :       Ops.pop_back();
     521      304180 :       if (!ContainingType)
     522             :         Ops.pop_back();
     523             :     }
     524             :   }
     525      963321 :   DEFINE_GETIMPL_STORE_N(DISubprogram,
     526             :                          (Line, ScopeLine, Virtuality, VirtualIndex,
     527             :                           ThisAdjustment, Flags, IsLocalToUnit, IsDefinition,
     528             :                           IsOptimized),
     529             :                          Ops, Ops.size());
     530             : }
     531             : 
     532       29393 : bool DISubprogram::describes(const Function *F) const {
     533             :   assert(F && "Invalid function");
     534       29393 :   if (F->getSubprogram() == this)
     535             :     return true;
     536             :   StringRef Name = getLinkageName();
     537       18839 :   if (Name.empty())
     538             :     Name = getName();
     539       18839 :   return F->getName() == Name;
     540             : }
     541             : 
     542       24470 : DILexicalBlock *DILexicalBlock::getImpl(LLVMContext &Context, Metadata *Scope,
     543             :                                         Metadata *File, unsigned Line,
     544             :                                         unsigned Column, StorageType Storage,
     545             :                                         bool ShouldCreate) {
     546             :   // Fixup column.
     547             :   adjustColumn(Column);
     548             : 
     549             :   assert(Scope && "Expected scope");
     550       24552 :   DEFINE_GETIMPL_LOOKUP(DILexicalBlock, (Scope, File, Line, Column));
     551       24466 :   Metadata *Ops[] = {File, Scope};
     552       48932 :   DEFINE_GETIMPL_STORE(DILexicalBlock, (Line, Column), Ops);
     553             : }
     554             : 
     555         927 : DILexicalBlockFile *DILexicalBlockFile::getImpl(LLVMContext &Context,
     556             :                                                 Metadata *Scope, Metadata *File,
     557             :                                                 unsigned Discriminator,
     558             :                                                 StorageType Storage,
     559             :                                                 bool ShouldCreate) {
     560             :   assert(Scope && "Expected scope");
     561        2779 :   DEFINE_GETIMPL_LOOKUP(DILexicalBlockFile, (Scope, File, Discriminator));
     562         465 :   Metadata *Ops[] = {File, Scope};
     563         930 :   DEFINE_GETIMPL_STORE(DILexicalBlockFile, (Discriminator), Ops);
     564             : }
     565             : 
     566       17270 : DINamespace *DINamespace::getImpl(LLVMContext &Context, Metadata *Scope,
     567             :                                   MDString *Name, bool ExportSymbols,
     568             :                                   StorageType Storage, bool ShouldCreate) {
     569             :   assert(isCanonical(Name) && "Expected canonical MDString");
     570       51808 :   DEFINE_GETIMPL_LOOKUP(DINamespace, (Scope, Name, ExportSymbols));
     571             :   // The nullptr is for DIScope's File operand. This should be refactored.
     572        3452 :   Metadata *Ops[] = {nullptr, Scope, Name};
     573        6904 :   DEFINE_GETIMPL_STORE(DINamespace, (ExportSymbols), Ops);
     574             : }
     575             : 
     576          97 : DIModule *DIModule::getImpl(LLVMContext &Context, Metadata *Scope,
     577             :                             MDString *Name, MDString *ConfigurationMacros,
     578             :                             MDString *IncludePath, MDString *ISysRoot,
     579             :                             StorageType Storage, bool ShouldCreate) {
     580             :   assert(isCanonical(Name) && "Expected canonical MDString");
     581         289 :   DEFINE_GETIMPL_LOOKUP(
     582             :       DIModule, (Scope, Name, ConfigurationMacros, IncludePath, ISysRoot));
     583          90 :   Metadata *Ops[] = {Scope, Name, ConfigurationMacros, IncludePath, ISysRoot};
     584         180 :   DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DIModule, Ops);
     585             : }
     586             : 
     587       53523 : DITemplateTypeParameter *DITemplateTypeParameter::getImpl(LLVMContext &Context,
     588             :                                                           MDString *Name,
     589             :                                                           Metadata *Type,
     590             :                                                           StorageType Storage,
     591             :                                                           bool ShouldCreate) {
     592             :   assert(isCanonical(Name) && "Expected canonical MDString");
     593      160565 :   DEFINE_GETIMPL_LOOKUP(DITemplateTypeParameter, (Name, Type));
     594       19547 :   Metadata *Ops[] = {Name, Type};
     595       39094 :   DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DITemplateTypeParameter, Ops);
     596             : }
     597             : 
     598       21187 : DITemplateValueParameter *DITemplateValueParameter::getImpl(
     599             :     LLVMContext &Context, unsigned Tag, MDString *Name, Metadata *Type,
     600             :     Metadata *Value, StorageType Storage, bool ShouldCreate) {
     601             :   assert(isCanonical(Name) && "Expected canonical MDString");
     602       63555 :   DEFINE_GETIMPL_LOOKUP(DITemplateValueParameter, (Tag, Name, Type, Value));
     603        6317 :   Metadata *Ops[] = {Name, Type, Value};
     604       12634 :   DEFINE_GETIMPL_STORE(DITemplateValueParameter, (Tag), Ops);
     605             : }
     606             : 
     607             : DIGlobalVariable *
     608        4835 : DIGlobalVariable::getImpl(LLVMContext &Context, Metadata *Scope, MDString *Name,
     609             :                           MDString *LinkageName, Metadata *File, unsigned Line,
     610             :                           Metadata *Type, bool IsLocalToUnit, bool IsDefinition,
     611             :                           Metadata *StaticDataMemberDeclaration,
     612             :                           uint32_t AlignInBits, StorageType Storage,
     613             :                           bool ShouldCreate) {
     614             :   assert(isCanonical(Name) && "Expected canonical MDString");
     615             :   assert(isCanonical(LinkageName) && "Expected canonical MDString");
     616        5953 :   DEFINE_GETIMPL_LOOKUP(DIGlobalVariable,
     617             :                         (Scope, Name, LinkageName, File, Line, Type,
     618             :                          IsLocalToUnit, IsDefinition,
     619             :                          StaticDataMemberDeclaration, AlignInBits));
     620             :   Metadata *Ops[] = {
     621        4834 :       Scope, Name, File, Type, Name, LinkageName, StaticDataMemberDeclaration};
     622        9668 :   DEFINE_GETIMPL_STORE(DIGlobalVariable,
     623             :                        (Line, IsLocalToUnit, IsDefinition, AlignInBits),
     624             :                        Ops);
     625             : }
     626             : 
     627       72416 : DILocalVariable *DILocalVariable::getImpl(LLVMContext &Context, Metadata *Scope,
     628             :                                           MDString *Name, Metadata *File,
     629             :                                           unsigned Line, Metadata *Type,
     630             :                                           unsigned Arg, DIFlags Flags,
     631             :                                           uint32_t AlignInBits,
     632             :                                           StorageType Storage,
     633             :                                           bool ShouldCreate) {
     634             :   // 64K ought to be enough for any frontend.
     635             :   assert(Arg <= UINT16_MAX && "Expected argument number to fit in 16-bits");
     636             : 
     637             :   assert(Scope && "Expected scope");
     638             :   assert(isCanonical(Name) && "Expected canonical MDString");
     639      217200 :   DEFINE_GETIMPL_LOOKUP(DILocalVariable,
     640             :                         (Scope, Name, File, Line, Type, Arg, Flags,
     641             :                          AlignInBits));
     642       72291 :   Metadata *Ops[] = {Scope, Name, File, Type};
     643      144582 :   DEFINE_GETIMPL_STORE(DILocalVariable, (Line, Arg, Flags, AlignInBits), Ops);
     644             : }
     645             : 
     646       23049 : Optional<uint64_t> DIVariable::getSizeInBits() const {
     647             :   // This is used by the Verifier so be mindful of broken types.
     648             :   const Metadata *RawType = getRawType();
     649       45589 :   while (RawType) {
     650             :     // Try to get the size directly.
     651             :     if (auto *T = dyn_cast<DIType>(RawType))
     652       34319 :       if (uint64_t Size = T->getSizeInBits())
     653             :         return Size;
     654             : 
     655       11270 :     if (auto *DT = dyn_cast<DIDerivedType>(RawType)) {
     656             :       // Look at the base type.
     657             :       RawType = DT->getRawBaseType();
     658             :       continue;
     659             :     }
     660             : 
     661             :     // Missing type or size.
     662             :     break;
     663             :   }
     664             : 
     665             :   // Fail gracefully.
     666             :   return None;
     667             : }
     668             : 
     669          27 : DILabel *DILabel::getImpl(LLVMContext &Context, Metadata *Scope,
     670             :                           MDString *Name, Metadata *File, unsigned Line,
     671             :                           StorageType Storage,
     672             :                           bool ShouldCreate) {
     673             :   assert(Scope && "Expected scope");
     674             :   assert(isCanonical(Name) && "Expected canonical MDString");
     675          81 :   DEFINE_GETIMPL_LOOKUP(DILabel,
     676             :                         (Scope, Name, File, Line));
     677          27 :   Metadata *Ops[] = {Scope, Name, File};
     678          54 :   DEFINE_GETIMPL_STORE(DILabel, (Line), Ops);
     679             : }
     680             : 
     681       83507 : DIExpression *DIExpression::getImpl(LLVMContext &Context,
     682             :                                     ArrayRef<uint64_t> Elements,
     683             :                                     StorageType Storage, bool ShouldCreate) {
     684      250519 :   DEFINE_GETIMPL_LOOKUP(DIExpression, (Elements));
     685        4279 :   DEFINE_GETIMPL_STORE_NO_OPS(DIExpression, (Elements));
     686             : }
     687             : 
     688      208586 : unsigned DIExpression::ExprOperand::getSize() const {
     689      208586 :   switch (getOp()) {
     690             :   case dwarf::DW_OP_LLVM_fragment:
     691             :     return 3;
     692      167987 :   case dwarf::DW_OP_constu:
     693             :   case dwarf::DW_OP_plus_uconst:
     694      167987 :     return 2;
     695       38059 :   default:
     696       38059 :     return 1;
     697             :   }
     698             : }
     699             : 
     700       32906 : bool DIExpression::isValid() const {
     701       68995 :   for (auto I = expr_op_begin(), E = expr_op_end(); I != E; ++I) {
     702             :     // Check that there's space for the operand.
     703        4115 :     if (I->get() + I->getSize() > E->get())
     704         932 :       return false;
     705             : 
     706             :     // Check that the operand is valid.
     707        4112 :     switch (I->getOp()) {
     708             :     default:
     709             :       return false;
     710             :     case dwarf::DW_OP_LLVM_fragment:
     711             :       // A fragment operator must appear at the end.
     712         922 :       return I->get() + I->getSize() == E->get();
     713             :     case dwarf::DW_OP_stack_value: {
     714             :       // Must be the last one or followed by a DW_OP_LLVM_fragment.
     715         432 :       if (I->get() + I->getSize() == E->get())
     716             :         break;
     717          83 :       auto J = I;
     718          83 :       if ((++J)->getOp() != dwarf::DW_OP_LLVM_fragment)
     719           0 :         return false;
     720             :       break;
     721             :     }
     722             :     case dwarf::DW_OP_swap: {
     723             :       // Must be more than one implicit element on the stack.
     724             : 
     725             :       // FIXME: A better way to implement this would be to add a local variable
     726             :       // that keeps track of the stack depth and introduce something like a
     727             :       // DW_LLVM_OP_implicit_location as a placeholder for the location this
     728             :       // DIExpression is attached to, or else pass the number of implicit stack
     729             :       // elements into isValid.
     730         224 :       if (getNumElements() == 1)
     731             :         return false;
     732             :       break;
     733             :     }
     734             :     case dwarf::DW_OP_constu:
     735             :     case dwarf::DW_OP_plus_uconst:
     736             :     case dwarf::DW_OP_plus:
     737             :     case dwarf::DW_OP_minus:
     738             :     case dwarf::DW_OP_mul:
     739             :     case dwarf::DW_OP_div:
     740             :     case dwarf::DW_OP_mod:
     741             :     case dwarf::DW_OP_or:
     742             :     case dwarf::DW_OP_and:
     743             :     case dwarf::DW_OP_xor:
     744             :     case dwarf::DW_OP_shl:
     745             :     case dwarf::DW_OP_shr:
     746             :     case dwarf::DW_OP_shra:
     747             :     case dwarf::DW_OP_deref:
     748             :     case dwarf::DW_OP_xderef:
     749             :     case dwarf::DW_OP_lit0:
     750             :     case dwarf::DW_OP_not:
     751             :     case dwarf::DW_OP_dup:
     752             :       break;
     753             :     }
     754             :   }
     755       31974 :   return true;
     756             : }
     757             : 
     758             : Optional<DIExpression::FragmentInfo>
     759      321687 : DIExpression::getFragmentInfo(expr_op_iterator Start, expr_op_iterator End) {
     760      767373 :   for (auto I = Start; I != End; ++I)
     761      128758 :     if (I->getOp() == dwarf::DW_OP_LLVM_fragment) {
     762             :       DIExpression::FragmentInfo Info = {I->getArg(1), I->getArg(0)};
     763             :       return Info;
     764             :     }
     765             :   return None;
     766             : }
     767             : 
     768        8698 : void DIExpression::appendOffset(SmallVectorImpl<uint64_t> &Ops,
     769             :                                 int64_t Offset) {
     770        8698 :   if (Offset > 0) {
     771        4013 :     Ops.push_back(dwarf::DW_OP_plus_uconst);
     772        4013 :     Ops.push_back(Offset);
     773        4685 :   } else if (Offset < 0) {
     774         319 :     Ops.push_back(dwarf::DW_OP_constu);
     775         319 :     Ops.push_back(-Offset);
     776         319 :     Ops.push_back(dwarf::DW_OP_minus);
     777             :   }
     778        8698 : }
     779             : 
     780         195 : bool DIExpression::extractIfOffset(int64_t &Offset) const {
     781         195 :   if (getNumElements() == 0) {
     782         189 :     Offset = 0;
     783         189 :     return true;
     784             :   }
     785             : 
     786           6 :   if (getNumElements() == 2 && Elements[0] == dwarf::DW_OP_plus_uconst) {
     787           6 :     Offset = Elements[1];
     788           6 :     return true;
     789             :   }
     790             : 
     791           0 :   if (getNumElements() == 3 && Elements[0] == dwarf::DW_OP_constu) {
     792           0 :     if (Elements[2] == dwarf::DW_OP_plus) {
     793           0 :       Offset = Elements[1];
     794           0 :       return true;
     795             :     }
     796           0 :     if (Elements[2] == dwarf::DW_OP_minus) {
     797           0 :       Offset = -Elements[1];
     798           0 :       return true;
     799             :     }
     800             :   }
     801             : 
     802             :   return false;
     803             : }
     804             : 
     805        4209 : DIExpression *DIExpression::prepend(const DIExpression *Expr, bool DerefBefore,
     806             :                                     int64_t Offset, bool DerefAfter,
     807             :                                     bool StackValue) {
     808             :   SmallVector<uint64_t, 8> Ops;
     809        4209 :   if (DerefBefore)
     810         552 :     Ops.push_back(dwarf::DW_OP_deref);
     811             : 
     812        4209 :   appendOffset(Ops, Offset);
     813        4209 :   if (DerefAfter)
     814           1 :     Ops.push_back(dwarf::DW_OP_deref);
     815             : 
     816        8418 :   return prependOpcodes(Expr, Ops, StackValue);
     817             : }
     818             : 
     819        6552 : DIExpression *DIExpression::prependOpcodes(const DIExpression *Expr,
     820             :                                            SmallVectorImpl<uint64_t> &Ops,
     821             :                                            bool StackValue) {
     822             :   assert(Expr && "Can't prepend ops to this expression");
     823             : 
     824             :   // If there are no ops to prepend, do not even add the DW_OP_stack_value.
     825        6552 :   if (Ops.empty())
     826             :     StackValue = false;
     827       15117 :   for (auto Op : Expr->expr_ops()) {
     828             :     // A DW_OP_stack_value comes at the end, but before a DW_OP_LLVM_fragment.
     829        2013 :     if (StackValue) {
     830        1539 :       if (Op.getOp() == dwarf::DW_OP_stack_value)
     831             :         StackValue = false;
     832        1077 :       else if (Op.getOp() == dwarf::DW_OP_LLVM_fragment) {
     833          17 :         Ops.push_back(dwarf::DW_OP_stack_value);
     834             :         StackValue = false;
     835             :       }
     836             :     }
     837        2013 :     Op.appendToVector(Ops);
     838             :   }
     839        6552 :   if (StackValue)
     840        2498 :     Ops.push_back(dwarf::DW_OP_stack_value);
     841        6552 :   return DIExpression::get(Expr->getContext(), Ops);
     842             : }
     843             : 
     844           7 : DIExpression *DIExpression::appendToStack(const DIExpression *Expr,
     845             :                                           ArrayRef<uint64_t> Ops) {
     846             :   assert(Expr && !Ops.empty() && "Can't append ops to this expression");
     847             : 
     848             :   // Append a DW_OP_deref after Expr's current op list if it's non-empty and
     849             :   // has no DW_OP_stack_value.
     850             :   //
     851             :   // Match .* DW_OP_stack_value (DW_OP_LLVM_fragment A B)?.
     852             :   Optional<FragmentInfo> FI = Expr->getFragmentInfo();
     853           7 :   unsigned DropUntilStackValue = FI.hasValue() ? 3 : 0;
     854             :   bool NeedsDeref =
     855          11 :       (Expr->getNumElements() > DropUntilStackValue) &&
     856           8 :       (Expr->getElements().drop_back(DropUntilStackValue).back() !=
     857             :        dwarf::DW_OP_stack_value);
     858             : 
     859             :   // Copy Expr's current op list, add a DW_OP_deref if needed, and ensure that
     860             :   // a DW_OP_stack_value is present.
     861             :   SmallVector<uint64_t, 16> NewOps;
     862          22 :   for (auto Op : Expr->expr_ops()) {
     863          12 :     if (Op.getOp() == dwarf::DW_OP_stack_value ||
     864             :         Op.getOp() == dwarf::DW_OP_LLVM_fragment)
     865             :       break;
     866           8 :     Op.appendToVector(NewOps);
     867             :   }
     868           7 :   if (NeedsDeref)
     869           2 :     NewOps.push_back(dwarf::DW_OP_deref);
     870           7 :   NewOps.append(Ops.begin(), Ops.end());
     871           7 :   NewOps.push_back(dwarf::DW_OP_stack_value);
     872             : 
     873             :   // If Expr is a fragment, make the new expression a fragment as well.
     874           7 :   if (FI)
     875          12 :     NewOps.append(
     876           6 :         {dwarf::DW_OP_LLVM_fragment, FI->OffsetInBits, FI->SizeInBits});
     877           7 :   return DIExpression::get(Expr->getContext(), NewOps);
     878             : }
     879             : 
     880         273 : Optional<DIExpression *> DIExpression::createFragmentExpression(
     881             :     const DIExpression *Expr, unsigned OffsetInBits, unsigned SizeInBits) {
     882             :   SmallVector<uint64_t, 8> Ops;
     883             :   // Copy over the expression, but leave off any trailing DW_OP_LLVM_fragment.
     884         273 :   if (Expr) {
     885         571 :     for (auto Op : Expr->expr_ops()) {
     886          29 :       switch (Op.getOp()) {
     887             :       default: break;
     888             :       case dwarf::DW_OP_plus:
     889             :       case dwarf::DW_OP_minus:
     890             :         // We can't safely split arithmetic into multiple fragments because we
     891             :         // can't express carry-over between fragments.
     892             :         //
     893             :         // FIXME: We *could* preserve the lowest fragment of a constant offset
     894             :         // operation if the offset fits into SizeInBits.
     895           4 :         return None;
     896             :       case dwarf::DW_OP_LLVM_fragment: {
     897             :         // Make the new offset point into the existing fragment.
     898             :         uint64_t FragmentOffsetInBits = Op.getArg(0);
     899             :         uint64_t FragmentSizeInBits = Op.getArg(1);
     900             :         (void)FragmentSizeInBits;
     901             :         assert((OffsetInBits + SizeInBits <= FragmentSizeInBits) &&
     902             :                "new fragment outside of original fragment");
     903          21 :         OffsetInBits += FragmentOffsetInBits;
     904          21 :         continue;
     905             :       }
     906             :       }
     907           4 :       Op.appendToVector(Ops);
     908             :     }
     909             :   }
     910         269 :   Ops.push_back(dwarf::DW_OP_LLVM_fragment);
     911         269 :   Ops.push_back(OffsetInBits);
     912         269 :   Ops.push_back(SizeInBits);
     913             :   return DIExpression::get(Expr->getContext(), Ops);
     914             : }
     915             : 
     916        7550 : bool DIExpression::isConstant() const {
     917             :   // Recognize DW_OP_constu C DW_OP_stack_value (DW_OP_LLVM_fragment Len Ofs)?.
     918        7550 :   if (getNumElements() != 3 && getNumElements() != 6)
     919             :     return false;
     920          45 :   if (getElement(0) != dwarf::DW_OP_constu ||
     921             :       getElement(2) != dwarf::DW_OP_stack_value)
     922             :     return false;
     923          32 :   if (getNumElements() == 6 && getElement(3) != dwarf::DW_OP_LLVM_fragment)
     924             :     return false;
     925             :   return true;
     926             : }
     927             : 
     928             : DIGlobalVariableExpression *
     929        4611 : DIGlobalVariableExpression::getImpl(LLVMContext &Context, Metadata *Variable,
     930             :                                     Metadata *Expression, StorageType Storage,
     931             :                                     bool ShouldCreate) {
     932       13649 :   DEFINE_GETIMPL_LOOKUP(DIGlobalVariableExpression, (Variable, Expression));
     933        4608 :   Metadata *Ops[] = {Variable, Expression};
     934        9216 :   DEFINE_GETIMPL_STORE_NO_CONSTRUCTOR_ARGS(DIGlobalVariableExpression, Ops);
     935             : }
     936             : 
     937         123 : DIObjCProperty *DIObjCProperty::getImpl(
     938             :     LLVMContext &Context, MDString *Name, Metadata *File, unsigned Line,
     939             :     MDString *GetterName, MDString *SetterName, unsigned Attributes,
     940             :     Metadata *Type, StorageType Storage, bool ShouldCreate) {
     941             :   assert(isCanonical(Name) && "Expected canonical MDString");
     942             :   assert(isCanonical(GetterName) && "Expected canonical MDString");
     943             :   assert(isCanonical(SetterName) && "Expected canonical MDString");
     944         367 :   DEFINE_GETIMPL_LOOKUP(DIObjCProperty, (Name, File, Line, GetterName,
     945             :                                          SetterName, Attributes, Type));
     946          91 :   Metadata *Ops[] = {Name, File, GetterName, SetterName, Type};
     947         182 :   DEFINE_GETIMPL_STORE(DIObjCProperty, (Line, Attributes), Ops);
     948             : }
     949             : 
     950       95544 : DIImportedEntity *DIImportedEntity::getImpl(LLVMContext &Context, unsigned Tag,
     951             :                                             Metadata *Scope, Metadata *Entity,
     952             :                                             Metadata *File, unsigned Line,
     953             :                                             MDString *Name, StorageType Storage,
     954             :                                             bool ShouldCreate) {
     955             :   assert(isCanonical(Name) && "Expected canonical MDString");
     956      286630 :   DEFINE_GETIMPL_LOOKUP(DIImportedEntity,
     957             :                         (Tag, Scope, Entity, File, Line, Name));
     958       95538 :   Metadata *Ops[] = {Scope, Entity, Name, File};
     959      191076 :   DEFINE_GETIMPL_STORE(DIImportedEntity, (Tag, Line), Ops);
     960             : }
     961             : 
     962        1106 : DIMacro *DIMacro::getImpl(LLVMContext &Context, unsigned MIType,
     963             :                           unsigned Line, MDString *Name, MDString *Value,
     964             :                           StorageType Storage, bool ShouldCreate) {
     965             :   assert(isCanonical(Name) && "Expected canonical MDString");
     966        3318 :   DEFINE_GETIMPL_LOOKUP(DIMacro, (MIType, Line, Name, Value));
     967        1097 :   Metadata *Ops[] = { Name, Value };
     968        2194 :   DEFINE_GETIMPL_STORE(DIMacro, (MIType, Line), Ops);
     969             : }
     970             : 
     971          84 : DIMacroFile *DIMacroFile::getImpl(LLVMContext &Context, unsigned MIType,
     972             :                                   unsigned Line, Metadata *File,
     973             :                                   Metadata *Elements, StorageType Storage,
     974             :                                   bool ShouldCreate) {
     975         216 :   DEFINE_GETIMPL_LOOKUP(DIMacroFile,
     976             :                         (MIType, Line, File, Elements));
     977          82 :   Metadata *Ops[] = { File, Elements };
     978         164 :   DEFINE_GETIMPL_STORE(DIMacroFile, (MIType, Line), Ops);
     979             : }

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