LLVM  15.0.0git
DWARFLinkerCompileUnit.h
Go to the documentation of this file.
1 //===- DWARFLinkerCompileUnit.h ---------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
10 #define LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
11 
12 #include "llvm/ADT/DenseMap.h"
13 #include "llvm/ADT/IntervalMap.h"
14 #include "llvm/CodeGen/DIE.h"
16 
17 namespace llvm {
18 
19 class DeclContext;
20 
21 template <typename KeyT, typename ValT>
22 using HalfOpenIntervalMap =
23  IntervalMap<KeyT, ValT, IntervalMapImpl::NodeSizer<KeyT, ValT>::LeafSize,
25 
27 
28 // FIXME: Delete this structure.
29 struct PatchLocation {
31 
32  PatchLocation() = default;
34 
35  void set(uint64_t New) const {
36  assert(I);
37  const auto &Old = *I;
38  assert(Old.getType() == DIEValue::isInteger);
39  *I = DIEValue(Old.getAttribute(), Old.getForm(), DIEInteger(New));
40  }
41 
42  uint64_t get() const {
43  assert(I);
44  return I->getDIEInteger().getValue();
45  }
46 };
47 
48 /// Stores all information relating to a compile unit, be it in its original
49 /// instance in the object file to its brand new cloned and generated DIE tree.
50 class CompileUnit {
51 public:
52  /// Information gathered about a DIE in the object file.
53  struct DIEInfo {
54  /// Address offset to apply to the described entity.
55  int64_t AddrAdjust;
56 
57  /// ODR Declaration context.
59 
60  /// Cloned version of that DIE.
62 
63  /// The index of this DIE's parent.
65 
66  /// Is the DIE part of the linked output?
67  bool Keep : 1;
68 
69  /// Was this DIE's entity found in the map?
70  bool InDebugMap : 1;
71 
72  /// Is this a pure forward declaration we can strip?
73  bool Prune : 1;
74 
75  /// Does DIE transitively refer an incomplete decl?
76  bool Incomplete : 1;
77  };
78 
79  CompileUnit(DWARFUnit &OrigUnit, unsigned ID, bool CanUseODR,
80  StringRef ClangModuleName)
81  : OrigUnit(OrigUnit), ID(ID), Ranges(RangeAlloc),
82  ClangModuleName(ClangModuleName) {
83  Info.resize(OrigUnit.getNumDIEs());
84 
85  auto CUDie = OrigUnit.getUnitDIE(false);
86  if (!CUDie) {
87  HasODR = false;
88  return;
89  }
90  if (auto Lang = dwarf::toUnsigned(CUDie.find(dwarf::DW_AT_language)))
91  HasODR = CanUseODR && (*Lang == dwarf::DW_LANG_C_plus_plus ||
92  *Lang == dwarf::DW_LANG_C_plus_plus_03 ||
93  *Lang == dwarf::DW_LANG_C_plus_plus_11 ||
94  *Lang == dwarf::DW_LANG_C_plus_plus_14 ||
95  *Lang == dwarf::DW_LANG_ObjC_plus_plus);
96  else
97  HasODR = false;
98  }
99 
100  DWARFUnit &getOrigUnit() const { return OrigUnit; }
101 
102  unsigned getUniqueID() const { return ID; }
103 
104  void createOutputDIE() { NewUnit.emplace(OrigUnit.getUnitDIE().getTag()); }
105 
107  if (NewUnit)
108  return &const_cast<BasicDIEUnit &>(*NewUnit).getUnitDie();
109  return nullptr;
110  }
111 
112  bool hasODR() const { return HasODR; }
113  bool isClangModule() const { return !ClangModuleName.empty(); }
115  /// Return the DW_AT_LLVM_sysroot of the compile unit or an empty StringRef.
117 
118  const std::string &getClangModuleName() const { return ClangModuleName; }
119 
120  DIEInfo &getInfo(unsigned Idx) { return Info[Idx]; }
121  const DIEInfo &getInfo(unsigned Idx) const { return Info[Idx]; }
122 
123  DIEInfo &getInfo(const DWARFDie &Die) {
124  unsigned Idx = getOrigUnit().getDIEIndex(Die);
125  return Info[Idx];
126  }
127 
128  uint64_t getStartOffset() const { return StartOffset; }
129  uint64_t getNextUnitOffset() const { return NextUnitOffset; }
131 
132  uint64_t getLowPc() const { return LowPc; }
133  uint64_t getHighPc() const { return HighPc; }
134  bool hasLabelAt(uint64_t Addr) const { return Labels.count(Addr); }
135 
137  return UnitRangeAttribute;
138  }
139 
140  const FunctionIntervals &getFunctionRanges() const { return Ranges; }
141 
142  const std::vector<PatchLocation> &getRangesAttributes() const {
143  return RangeAttributes;
144  }
145 
146  const std::vector<std::pair<PatchLocation, int64_t>> &
148  return LocationAttributes;
149  }
150 
151  /// Mark every DIE in this unit as kept. This function also
152  /// marks variables as InDebugMap so that they appear in the
153  /// reconstructed accelerator tables.
154  void markEverythingAsKept();
155 
156  /// Compute the end offset for this unit. Must be called after the CU's DIEs
157  /// have been cloned. \returns the next unit offset (which is also the
158  /// current debug_info section size).
160 
161  /// Keep track of a forward reference to DIE \p Die in \p RefUnit by \p
162  /// Attr. The attribute should be fixed up later to point to the absolute
163  /// offset of \p Die in the debug_info section or to the canonical offset of
164  /// \p Ctxt if it is non-null.
165  void noteForwardReference(DIE *Die, const CompileUnit *RefUnit,
166  DeclContext *Ctxt, PatchLocation Attr);
167 
168  /// Apply all fixups recorded by noteForwardReference().
169  void fixupForwardReferences();
170 
171  /// Add the low_pc of a label that is relocated by applying
172  /// offset \p PCOffset.
173  void addLabelLowPc(uint64_t LabelLowPc, int64_t PcOffset);
174 
175  /// Add a function range [\p LowPC, \p HighPC) that is relocated by applying
176  /// offset \p PCOffset.
177  void addFunctionRange(uint64_t LowPC, uint64_t HighPC, int64_t PCOffset);
178 
179  /// Keep track of a DW_AT_range attribute that we will need to patch up later.
180  void noteRangeAttribute(const DIE &Die, PatchLocation Attr);
181 
182  /// Keep track of a location attribute pointing to a location list in the
183  /// debug_loc section.
184  void noteLocationAttribute(PatchLocation Attr, int64_t PcOffset);
185 
186  /// Add a name accelerator entry for \a Die with \a Name.
188 
189  /// Add a name accelerator entry for \a Die with \a Name.
191  bool SkipPubnamesSection = false);
192 
193  /// Add various accelerator entries for \p Die with \p Name which is stored
194  /// in the string table at \p Offset. \p Name must be an Objective-C
195  /// selector.
197  bool SkipPubnamesSection = false);
198 
199  /// Add a type accelerator entry for \p Die with \p Name which is stored in
200  /// the string table at \p Offset.
202  bool ObjcClassImplementation,
203  uint32_t QualifiedNameHash);
204 
205  struct AccelInfo {
206  /// Name of the entry.
208 
209  /// DIE this entry describes.
210  const DIE *Die;
211 
212  /// Hash of the fully qualified name.
214 
215  /// Emit this entry only in the apple_* sections.
217 
218  /// Is this an ObjC class implementation?
220 
222  bool SkipPubSection = false)
224 
226  uint32_t QualifiedNameHash, bool ObjCClassIsImplementation)
229  ObjcClassImplementation(ObjCClassIsImplementation) {}
230  };
231 
232  const std::vector<AccelInfo> &getPubnames() const { return Pubnames; }
233  const std::vector<AccelInfo> &getPubtypes() const { return Pubtypes; }
234  const std::vector<AccelInfo> &getNamespaces() const { return Namespaces; }
235  const std::vector<AccelInfo> &getObjC() const { return ObjC; }
236 
237  MCSymbol *getLabelBegin() { return LabelBegin; }
238  void setLabelBegin(MCSymbol *S) { LabelBegin = S; }
239 
240 private:
241  DWARFUnit &OrigUnit;
242  unsigned ID;
243  std::vector<DIEInfo> Info; ///< DIE info indexed by DIE index.
244  Optional<BasicDIEUnit> NewUnit;
245  MCSymbol *LabelBegin = nullptr;
246 
247  uint64_t StartOffset;
248  uint64_t NextUnitOffset;
249 
251  uint64_t HighPc = 0;
252 
253  /// A list of attributes to fixup with the absolute offset of
254  /// a DIE in the debug_info section.
255  ///
256  /// The offsets for the attributes in this array couldn't be set while
257  /// cloning because for cross-cu forward references the target DIE's offset
258  /// isn't known you emit the reference attribute.
259  std::vector<
260  std::tuple<DIE *, const CompileUnit *, DeclContext *, PatchLocation>>
261  ForwardDIEReferences;
262 
263  FunctionIntervals::Allocator RangeAlloc;
264 
265  /// The ranges in that interval map are the PC ranges for
266  /// functions in this unit, associated with the PC offset to apply
267  /// to the addresses to get the linked address.
268  FunctionIntervals Ranges;
269 
270  /// The DW_AT_low_pc of each DW_TAG_label.
272 
273  /// DW_AT_ranges attributes to patch after we have gathered
274  /// all the unit's function addresses.
275  /// @{
276  std::vector<PatchLocation> RangeAttributes;
277  Optional<PatchLocation> UnitRangeAttribute;
278  /// @}
279 
280  /// Location attributes that need to be transferred from the
281  /// original debug_loc section to the liked one. They are stored
282  /// along with the PC offset that is to be applied to their
283  /// function's address.
284  std::vector<std::pair<PatchLocation, int64_t>> LocationAttributes;
285 
286  /// Accelerator entries for the unit, both for the pub*
287  /// sections and the apple* ones.
288  /// @{
289  std::vector<AccelInfo> Pubnames;
290  std::vector<AccelInfo> Pubtypes;
291  std::vector<AccelInfo> Namespaces;
292  std::vector<AccelInfo> ObjC;
293  /// @}
294 
295  /// Is this unit subject to the ODR rule?
296  bool HasODR;
297 
298  /// The DW_AT_language of this unit.
299  uint16_t Language = 0;
300 
301  /// The DW_AT_LLVM_sysroot of this unit.
302  std::string SysRoot;
303 
304  /// If this is a Clang module, this holds the module's name.
305  std::string ClangModuleName;
306 };
307 
308 } // end namespace llvm
309 
310 #endif // LLVM_DWARFLINKER_DWARFLINKERCOMPILEUNIT_H
llvm::CompileUnit::DIEInfo::AddrAdjust
int64_t AddrAdjust
Address offset to apply to the described entity.
Definition: DWARFLinkerCompileUnit.h:55
llvm::CompileUnit::getUnitRangesAttribute
Optional< PatchLocation > getUnitRangesAttribute() const
Definition: DWARFLinkerCompileUnit.h:136
llvm::CompileUnit::hasLabelAt
bool hasLabelAt(uint64_t Addr) const
Definition: DWARFLinkerCompileUnit.h:134
llvm::CompileUnit::getOrigUnit
DWARFUnit & getOrigUnit() const
Definition: DWARFLinkerCompileUnit.h:100
llvm::CompileUnit::DIEInfo::Ctxt
DeclContext * Ctxt
ODR Declaration context.
Definition: DWARFLinkerCompileUnit.h:58
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:17
llvm::MCSymbol
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
llvm::CompileUnit::getInfo
DIEInfo & getInfo(unsigned Idx)
Definition: DWARFLinkerCompileUnit.h:120
llvm::DeclContext
A DeclContext is a named program scope that is used for ODR uniquing of types.
Definition: DWARFLinkerDeclContext.h:77
llvm::PatchLocation::get
uint64_t get() const
Definition: DWARFLinkerCompileUnit.h:42
llvm::DIEValue
Definition: DIE.h:369
llvm::CompileUnit::DIEInfo::ParentIdx
uint32_t ParentIdx
The index of this DIE's parent.
Definition: DWARFLinkerCompileUnit.h:64
llvm::CompileUnit::getRangesAttributes
const std::vector< PatchLocation > & getRangesAttributes() const
Definition: DWARFLinkerCompileUnit.h:142
llvm::HalfOpenIntervalMap
IntervalMap< KeyT, ValT, IntervalMapImpl::NodeSizer< KeyT, ValT >::LeafSize, IntervalMapHalfOpenInfo< KeyT > > HalfOpenIntervalMap
Definition: DWARFLinkerCompileUnit.h:24
llvm::CompileUnit::addTypeAccelerator
void addTypeAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool ObjcClassImplementation, uint32_t QualifiedNameHash)
Add a type accelerator entry for Die with Name which is stored in the string table at Offset.
Definition: DWARFLinkerCompileUnit.cpp:143
llvm::SmallDenseMap< uint64_t, uint64_t, 1 >
llvm::PatchLocation::PatchLocation
PatchLocation(DIE::value_iterator I)
Definition: DWARFLinkerCompileUnit.h:33
llvm::CompileUnit::DIEInfo::Prune
bool Prune
Is this a pure forward declaration we can strip?
Definition: DWARFLinkerCompileUnit.h:73
llvm::BasicDIEUnit
Definition: DIE.h:923
llvm::CompileUnit::getClangModuleName
const std::string & getClangModuleName() const
Definition: DWARFLinkerCompileUnit.h:118
DenseMap.h
llvm::CompileUnit::getLanguage
uint16_t getLanguage()
Definition: DWARFLinkerCompileUnit.cpp:24
llvm::CompileUnit::getPubtypes
const std::vector< AccelInfo > & getPubtypes() const
Definition: DWARFLinkerCompileUnit.h:233
llvm::CompileUnit::getLabelBegin
MCSymbol * getLabelBegin()
Definition: DWARFLinkerCompileUnit.h:237
llvm::CompileUnit::CompileUnit
CompileUnit(DWARFUnit &OrigUnit, unsigned ID, bool CanUseODR, StringRef ClangModuleName)
Definition: DWARFLinkerCompileUnit.h:79
llvm::Optional
Definition: APInt.h:33
llvm::DenseMapBase::count
size_type count(const_arg_type_t< KeyT > Val) const
Return 1 if the specified key is in the map, 0 otherwise.
Definition: DenseMap.h:147
llvm::CompileUnit::noteRangeAttribute
void noteRangeAttribute(const DIE &Die, PatchLocation Attr)
Keep track of a DW_AT_range attribute that we will need to patch up later.
Definition: DWARFLinkerCompileUnit.cpp:115
llvm::CompileUnit::getHighPc
uint64_t getHighPc() const
Definition: DWARFLinkerCompileUnit.h:133
llvm::DIE
A structured debug information entry.
Definition: DIE.h:739
llvm::CompileUnit::DIEInfo::InDebugMap
bool InDebugMap
Was this DIE's entity found in the map?
Definition: DWARFLinkerCompileUnit.h:70
llvm::CompileUnit::AccelInfo::SkipPubSection
bool SkipPubSection
Emit this entry only in the apple_* sections.
Definition: DWARFLinkerCompileUnit.h:216
llvm::CompileUnit::getLocationAttributes
const std::vector< std::pair< PatchLocation, int64_t > > & getLocationAttributes() const
Definition: DWARFLinkerCompileUnit.h:147
llvm::DwarfStringPoolEntryRef
String pool entry reference.
Definition: DwarfStringPoolEntry.h:31
llvm::CompileUnit::addObjCAccelerator
void addObjCAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool SkipPubnamesSection=false)
Add various accelerator entries for Die with Name which is stored in the string table at Offset.
Definition: DWARFLinkerCompileUnit.cpp:131
llvm::yaml::isInteger
static bool isInteger(StringRef Val)
Definition: ELFYAML.cpp:1494
llvm::CompileUnit::AccelInfo::AccelInfo
AccelInfo(DwarfStringPoolEntryRef Name, const DIE *Die, uint32_t QualifiedNameHash, bool ObjCClassIsImplementation)
Definition: DWARFLinkerCompileUnit.h:225
llvm::DWARFUnit::getUnitDIE
DWARFDie getUnitDIE(bool ExtractUnitDIEOnly=true)
Definition: DWARFUnit.h:402
llvm::CompileUnit::DIEInfo::Clone
DIE * Clone
Cloned version of that DIE.
Definition: DWARFLinkerCompileUnit.h:61
llvm::DWARFUnit::getNumDIEs
unsigned getNumDIEs()
Returns the number of DIEs in the unit.
Definition: DWARFUnit.h:464
llvm::CompileUnit::DIEInfo
Information gathered about a DIE in the object file.
Definition: DWARFLinkerCompileUnit.h:53
llvm::CompileUnit::getInfo
DIEInfo & getInfo(const DWARFDie &Die)
Definition: DWARFLinkerCompileUnit.h:123
llvm::CompileUnit::getNamespaces
const std::vector< AccelInfo > & getNamespaces() const
Definition: DWARFLinkerCompileUnit.h:234
llvm::CompileUnit::getFunctionRanges
const FunctionIntervals & getFunctionRanges() const
Definition: DWARFLinkerCompileUnit.h:140
llvm::DIEValueList::value_iterator
Definition: DIE.h:675
llvm::DebugInfoSize
Hold the input and output of the debug info size in bytes.
Definition: DWARFLinker.cpp:39
false
Definition: StackSlotColoring.cpp:141
llvm::CompileUnit::getUniqueID
unsigned getUniqueID() const
Definition: DWARFLinkerCompileUnit.h:102
llvm::DIEInteger
An integer value DIE.
Definition: DIE.h:163
llvm::PatchLocation::I
DIE::value_iterator I
Definition: DWARFLinkerCompileUnit.h:30
llvm::CompileUnit::getPubnames
const std::vector< AccelInfo > & getPubnames() const
Definition: DWARFLinkerCompileUnit.h:232
llvm::CallingConv::ID
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
Definition: CallingConv.h:24
llvm::CompileUnit::getInfo
const DIEInfo & getInfo(unsigned Idx) const
Definition: DWARFLinkerCompileUnit.h:121
DIE.h
llvm::IntervalMap::Allocator
typename Sizer::Allocator Allocator
Definition: IntervalMap.h:962
llvm::CompileUnit::AccelInfo
Definition: DWARFLinkerCompileUnit.h:205
uint64_t
llvm::CompileUnit::getObjC
const std::vector< AccelInfo > & getObjC() const
Definition: DWARFLinkerCompileUnit.h:235
llvm::CompileUnit::AccelInfo::AccelInfo
AccelInfo(DwarfStringPoolEntryRef Name, const DIE *Die, bool SkipPubSection=false)
Definition: DWARFLinkerCompileUnit.h:221
llvm::CompileUnit::addLabelLowPc
void addLabelLowPc(uint64_t LabelLowPc, int64_t PcOffset)
Add the low_pc of a label that is relocated by applying offset PCOffset.
Definition: DWARFLinkerCompileUnit.cpp:100
llvm::CompileUnit::DIEInfo::Keep
bool Keep
Is the DIE part of the linked output?
Definition: DWARFLinkerCompileUnit.h:67
Addr
uint64_t Addr
Definition: ELFObjHandler.cpp:78
llvm::CompileUnit
Stores all information relating to a compile unit, be it in its original instance in the object file ...
Definition: DWARFLinkerCompileUnit.h:50
DWARFUnit.h
llvm::CompileUnit::getStartOffset
uint64_t getStartOffset() const
Definition: DWARFLinkerCompileUnit.h:128
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::CompileUnit::getLowPc
uint64_t getLowPc() const
Definition: DWARFLinkerCompileUnit.h:132
llvm::CompileUnit::getNextUnitOffset
uint64_t getNextUnitOffset() const
Definition: DWARFLinkerCompileUnit.h:129
llvm::CompileUnit::setStartOffset
void setStartOffset(uint64_t DebugInfoSize)
Definition: DWARFLinkerCompileUnit.h:130
llvm::IntervalMapHalfOpenInfo
Definition: IntervalMap.h:167
llvm::CompileUnit::setLabelBegin
void setLabelBegin(MCSymbol *S)
Definition: DWARFLinkerCompileUnit.h:238
llvm::CompileUnit::addFunctionRange
void addFunctionRange(uint64_t LowPC, uint64_t HighPC, int64_t PCOffset)
Add a function range [LowPC, HighPC) that is relocated by applying offset PCOffset.
Definition: DWARFLinkerCompileUnit.cpp:104
llvm::CompileUnit::AccelInfo::Name
DwarfStringPoolEntryRef Name
Name of the entry.
Definition: DWARFLinkerCompileUnit.h:207
llvm::CompileUnit::AccelInfo::QualifiedNameHash
uint32_t QualifiedNameHash
Hash of the fully qualified name.
Definition: DWARFLinkerCompileUnit.h:213
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
llvm::CompileUnit::addNameAccelerator
void addNameAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name, bool SkipPubnamesSection=false)
Add a name accelerator entry for Die with Name.
Definition: DWARFLinkerCompileUnit.cpp:137
llvm::CompileUnit::noteLocationAttribute
void noteLocationAttribute(PatchLocation Attr, int64_t PcOffset)
Keep track of a location attribute pointing to a location list in the debug_loc section.
Definition: DWARFLinkerCompileUnit.cpp:122
uint32_t
S
add sub stmia L5 ldr r0 bl L_printf $stub Instead of a and a wouldn t it be better to do three moves *Return an aggregate type is even return S
Definition: README.txt:210
llvm::CompileUnit::addNamespaceAccelerator
void addNamespaceAccelerator(const DIE *Die, DwarfStringPoolEntryRef Name)
Add a name accelerator entry for Die with Name.
Definition: DWARFLinkerCompileUnit.cpp:126
llvm::CompileUnit::computeNextUnitOffset
uint64_t computeNextUnitOffset(uint16_t DwarfVersion)
Compute the end offset for this unit.
Definition: DWARFLinkerCompileUnit.cpp:70
llvm::CompileUnit::getSysRoot
StringRef getSysRoot()
Return the DW_AT_LLVM_sysroot of the compile unit or an empty StringRef.
Definition: DWARFLinkerCompileUnit.cpp:32
llvm::GraphProgram::Name
Name
Definition: GraphWriter.h:50
uint16_t
llvm::CompileUnit::fixupForwardReferences
void fixupForwardReferences()
Apply all fixups recorded by noteForwardReference().
Definition: DWARFLinkerCompileUnit.cpp:86
llvm::DWARFUnit
Definition: DWARFUnit.h:207
llvm::PatchLocation
Definition: DWARFLinkerCompileUnit.h:29
llvm::PatchLocation::set
void set(uint64_t New) const
Definition: DWARFLinkerCompileUnit.h:35
llvm::CompileUnit::hasODR
bool hasODR() const
Definition: DWARFLinkerCompileUnit.h:112
llvm::CompileUnit::getOutputUnitDIE
DIE * getOutputUnitDIE() const
Definition: DWARFLinkerCompileUnit.h:106
llvm::dwarf::toUnsigned
Optional< uint64_t > toUnsigned(const Optional< DWARFFormValue > &V)
Take an optional DWARFFormValue and try to extract an unsigned constant.
Definition: DWARFFormValue.h:225
llvm::CompileUnit::createOutputDIE
void createOutputDIE()
Definition: DWARFLinkerCompileUnit.h:104
llvm::CompileUnit::AccelInfo::ObjcClassImplementation
bool ObjcClassImplementation
Is this an ObjC class implementation?
Definition: DWARFLinkerCompileUnit.h:219
llvm::DWARFDie::getTag
dwarf::Tag getTag() const
Definition: DWARFDie.h:72
llvm::PatchLocation::PatchLocation
PatchLocation()=default
IntervalMap.h
llvm::CompileUnit::AccelInfo::Die
const DIE * Die
DIE this entry describes.
Definition: DWARFLinkerCompileUnit.h:210
llvm::max
Align max(MaybeAlign Lhs, Align Rhs)
Definition: Alignment.h:340
llvm::IntervalMap
Definition: IntervalMap.h:936
llvm::CompileUnit::noteForwardReference
void noteForwardReference(DIE *Die, const CompileUnit *RefUnit, DeclContext *Ctxt, PatchLocation Attr)
Keep track of a forward reference to DIE Die in RefUnit by Attr.
Definition: DWARFLinkerCompileUnit.cpp:81
llvm::DWARFDie
Utility class that carries the DWARF compile/type unit and the debug info entry in an object.
Definition: DWARFDie.h:43
llvm::CompileUnit::DIEInfo::Incomplete
bool Incomplete
Does DIE transitively refer an incomplete decl?
Definition: DWARFLinkerCompileUnit.h:76
llvm::CompileUnit::markEverythingAsKept
void markEverythingAsKept()
Mark every DIE in this unit as kept.
Definition: DWARFLinkerCompileUnit.cpp:40
llvm::DIEUnit::getUnitDie
DIE & getUnitDie()
Definition: DIE.h:919
llvm::CompileUnit::isClangModule
bool isClangModule() const
Definition: DWARFLinkerCompileUnit.h:113