1 //===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains support for writing dwarf debug info into asm files.
11 //
12 //===----------------------------------------------------------------------===//
14 #ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
15 #define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
17 #include "DwarfFile.h"
18 #include "AsmPrinterHandler.h"
19 #include "DIE.h"
20 #include "DebugLocEntry.h"
21 #include "DebugLocList.h"
22 #include "DwarfAccelTable.h"
23 #include "llvm/ADT/DenseMap.h"
24 #include "llvm/ADT/MapVector.h"
25 #include "llvm/ADT/SmallPtrSet.h"
26 #include "llvm/ADT/StringMap.h"
27 #include "llvm/ADT/FoldingSet.h"
28 #include "llvm/CodeGen/LexicalScopes.h"
29 #include "llvm/IR/DebugInfo.h"
30 #include "llvm/IR/DebugLoc.h"
31 #include "llvm/MC/MachineLocation.h"
32 #include "llvm/MC/MCDwarf.h"
33 #include "llvm/Support/Allocator.h"
35 #include <memory>
37 namespace llvm {
39 class AsmPrinter;
40 class ByteStreamer;
41 class ConstantInt;
42 class ConstantFP;
43 class DwarfCompileUnit;
44 class DwarfDebug;
45 class DwarfTypeUnit;
46 class DwarfUnit;
47 class MachineModuleInfo;
49 //===----------------------------------------------------------------------===//
50 /// \brief This class is used to record source line correspondence.
51 class SrcLineInfo {
52 unsigned Line; // Source line number.
53 unsigned Column; // Source column.
54 unsigned SourceID; // Source ID number.
55 MCSymbol *Label; // Label in code ID number.
56 public:
57 SrcLineInfo(unsigned L, unsigned C, unsigned S, MCSymbol *label)
58 : Line(L), Column(C), SourceID(S), Label(label) {}
60 // Accessors
61 unsigned getLine() const { return Line; }
62 unsigned getColumn() const { return Column; }
63 unsigned getSourceID() const { return SourceID; }
64 MCSymbol *getLabel() const { return Label; }
65 };
67 //===----------------------------------------------------------------------===//
68 /// \brief This class is used to track local variable information.
69 class DbgVariable {
70 DIVariable Var; // Variable Descriptor.
71 DIE *TheDIE; // Variable DIE.
72 unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries.
73 DbgVariable *AbsVar; // Corresponding Abstract variable, if any.
74 const MachineInstr *MInsn; // DBG_VALUE instruction of the variable.
75 int FrameIndex;
76 DwarfDebug *DD;
78 public:
79 // AbsVar may be NULL.
80 DbgVariable(DIVariable V, DbgVariable *AV, DwarfDebug *DD)
81 : Var(V), TheDIE(0), DotDebugLocOffset(~0U), AbsVar(AV), MInsn(0),
82 FrameIndex(~0), DD(DD) {}
84 // Accessors.
85 DIVariable getVariable() const { return Var; }
86 void setDIE(DIE &D) { TheDIE = &D; }
87 DIE *getDIE() const { return TheDIE; }
88 void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; }
89 unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; }
90 StringRef getName() const { return Var.getName(); }
91 DbgVariable *getAbstractVariable() const { return AbsVar; }
92 const MachineInstr *getMInsn() const { return MInsn; }
93 void setMInsn(const MachineInstr *M) { MInsn = M; }
94 int getFrameIndex() const { return FrameIndex; }
95 void setFrameIndex(int FI) { FrameIndex = FI; }
96 // Translate tag to proper Dwarf tag.
97 dwarf::Tag getTag() const {
98 if (Var.getTag() == dwarf::DW_TAG_arg_variable)
99 return dwarf::DW_TAG_formal_parameter;
101 return dwarf::DW_TAG_variable;
102 }
103 /// \brief Return true if DbgVariable is artificial.
104 bool isArtificial() const {
105 if (Var.isArtificial())
106 return true;
107 if (getType().isArtificial())
108 return true;
109 return false;
110 }
112 bool isObjectPointer() const {
113 if (Var.isObjectPointer())
114 return true;
115 if (getType().isObjectPointer())
116 return true;
117 return false;
118 }
120 bool variableHasComplexAddress() const {
121 assert(Var.isVariable() && "Invalid complex DbgVariable!");
122 return Var.hasComplexAddress();
123 }
124 bool isBlockByrefVariable() const;
125 unsigned getNumAddrElements() const {
126 assert(Var.isVariable() && "Invalid complex DbgVariable!");
127 return Var.getNumAddrElements();
128 }
129 uint64_t getAddrElement(unsigned i) const { return Var.getAddrElement(i); }
130 DIType getType() const;
132 private:
133 /// resolve - Look in the DwarfDebug map for the MDNode that
134 /// corresponds to the reference.
135 template <typename T> T resolve(DIRef<T> Ref) const;
136 };
139 /// \brief Helper used to pair up a symbol and its DWARF compile unit.
140 struct SymbolCU {
141 SymbolCU(DwarfCompileUnit *CU, const MCSymbol *Sym) : Sym(Sym), CU(CU) {}
142 const MCSymbol *Sym;
143 DwarfCompileUnit *CU;
144 };
146 /// \brief Collects and handles dwarf debug information.
147 class DwarfDebug : public AsmPrinterHandler {
148 // Target of Dwarf emission.
149 AsmPrinter *Asm;
151 // Collected machine module information.
152 MachineModuleInfo *MMI;
154 // All DIEValues are allocated through this allocator.
155 BumpPtrAllocator DIEValueAllocator;
157 // Handle to the compile unit used for the inline extension handling,
158 // this is just so that the DIEValue allocator has a place to store
159 // the particular elements.
160 // FIXME: Store these off of DwarfDebug instead?
161 DwarfCompileUnit *FirstCU;
163 // Maps MDNode with its corresponding DwarfCompileUnit.
164 MapVector<const MDNode *, DwarfCompileUnit *> CUMap;
166 // Maps subprogram MDNode with its corresponding DwarfCompileUnit.
167 DenseMap<const MDNode *, DwarfCompileUnit *> SPMap;
169 // Maps a CU DIE with its corresponding DwarfCompileUnit.
170 DenseMap<const DIE *, DwarfCompileUnit *> CUDieMap;
172 /// Maps MDNodes for type system with the corresponding DIEs. These DIEs can
173 /// be shared across CUs, that is why we keep the map here instead
174 /// of in DwarfCompileUnit.
175 DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap;
177 // List of all labels used in aranges generation.
178 std::vector<SymbolCU> ArangeLabels;
180 // Size of each symbol emitted (for those symbols that have a specific size).
181 DenseMap<const MCSymbol *, uint64_t> SymSize;
183 // Provides a unique id per text section.
184 typedef DenseMap<const MCSection *, SmallVector<SymbolCU, 8> > SectionMapType;
185 SectionMapType SectionMap;
187 // List of arguments for current function.
188 SmallVector<DbgVariable *, 8> CurrentFnArguments;
190 LexicalScopes LScopes;
192 // Collection of abstract subprogram DIEs.
193 DenseMap<const MDNode *, DIE *> AbstractSPDies;
195 // Collection of dbg variables of a scope.
196 typedef DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> >
197 ScopeVariablesMap;
198 ScopeVariablesMap ScopeVariables;
200 // Collection of abstract variables.
201 DenseMap<const MDNode *, DbgVariable *> AbstractVariables;
203 // Collection of DebugLocEntry. Stored in a linked list so that DIELocLists
204 // can refer to them in spite of insertions into this list.
205 SmallVector<DebugLocList, 4> DotDebugLocEntries;
207 // Collection of subprogram DIEs that are marked (at the end of the module)
208 // as DW_AT_inline.
209 SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;
211 // This is a collection of subprogram MDNodes that are processed to
212 // create DIEs.
213 SmallPtrSet<const MDNode *, 16> ProcessedSPNodes;
215 // Maps instruction with label emitted before instruction.
216 DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn;
218 // Maps instruction with label emitted after instruction.
219 DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
221 // Every user variable mentioned by a DBG_VALUE instruction in order of
222 // appearance.
223 SmallVector<const MDNode *, 8> UserVariables;
225 // For each user variable, keep a list of DBG_VALUE instructions in order.
226 // The list can also contain normal instructions that clobber the previous
227 // DBG_VALUE.
228 typedef DenseMap<const MDNode *, SmallVector<const MachineInstr *, 4> >
229 DbgValueHistoryMap;
230 DbgValueHistoryMap DbgValues;
232 // Previous instruction's location information. This is used to determine
233 // label location to indicate scope boundries in dwarf debug info.
234 DebugLoc PrevInstLoc;
235 MCSymbol *PrevLabel;
237 // This location indicates end of function prologue and beginning of function
238 // body.
239 DebugLoc PrologEndLoc;
241 // If nonnull, stores the current machine function we're processing.
242 const MachineFunction *CurFn;
244 // If nonnull, stores the current machine instruction we're processing.
245 const MachineInstr *CurMI;
247 // If nonnull, stores the section that the previous function was allocated to
248 // emitting.
249 const MCSection *PrevSection;
251 // If nonnull, stores the CU in which the previous subprogram was contained.
252 const DwarfCompileUnit *PrevCU;
254 // Section Symbols: these are assembler temporary labels that are emitted at
255 // the beginning of each supported dwarf section. These are used to form
256 // section offsets and are created by EmitSectionLabels.
257 MCSymbol *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
258 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym;
259 MCSymbol *DwarfDebugLocSectionSym, *DwarfLineSectionSym, *DwarfAddrSectionSym;
260 MCSymbol *FunctionBeginSym, *FunctionEndSym;
261 MCSymbol *DwarfInfoDWOSectionSym, *DwarfAbbrevDWOSectionSym;
262 MCSymbol *DwarfStrDWOSectionSym;
263 MCSymbol *DwarfGnuPubNamesSectionSym, *DwarfGnuPubTypesSectionSym;
265 // As an optimization, there is no need to emit an entry in the directory
266 // table for the same directory as DW_AT_comp_dir.
267 StringRef CompilationDir;
269 // Counter for assigning globally unique IDs for ranges.
270 unsigned GlobalRangeCount;
272 // Holder for the file specific debug information.
273 DwarfFile InfoHolder;
275 // Holders for the various debug information flags that we might need to
276 // have exposed. See accessor functions below for description.
278 // Holder for imported entities.
279 typedef SmallVector<std::pair<const MDNode *, const MDNode *>, 32>
280 ImportedEntityMap;
281 ImportedEntityMap ScopesWithImportedEntities;
283 // Map from MDNodes for user-defined types to the type units that describe
284 // them.
285 DenseMap<const MDNode *, const DwarfTypeUnit *> DwarfTypeUnits;
287 SmallVector<std::pair<std::unique_ptr<DwarfTypeUnit>, DICompositeType>, 1> TypeUnitsUnderConstruction;
289 // Whether to emit the pubnames/pubtypes sections.
290 bool HasDwarfPubSections;
292 // Whether or not to use AT_ranges for compilation units.
293 bool HasCURanges;
295 // Whether we emitted a function into a section other than the default
296 // text.
297 bool UsedNonDefaultText;
299 // Version of dwarf we're emitting.
300 unsigned DwarfVersion;
302 // Maps from a type identifier to the actual MDNode.
303 DITypeIdentifierMap TypeIdentifierMap;
305 // DWARF5 Experimental Options
306 bool HasDwarfAccelTables;
307 bool HasSplitDwarf;
309 // Separated Dwarf Variables
310 // In general these will all be for bits that are left in the
311 // original object file, rather than things that are meant
312 // to be in the .dwo sections.
314 // Holder for the skeleton information.
315 DwarfFile SkeletonHolder;
317 /// Store file names for type units under fission in a line table header that
318 /// will be emitted into debug_line.dwo.
319 // FIXME: replace this with a map from comp_dir to table so that we can emit
320 // multiple tables during LTO each of which uses directory 0, referencing the
321 // comp_dir of all the type units that use it.
322 MCDwarfDwoLineTable SplitTypeUnitFileTable;
324 // True iff there are multiple CUs in this module.
325 bool SingleCU;
327 AddressPool AddrPool;
329 DwarfAccelTable AccelNames;
330 DwarfAccelTable AccelObjC;
331 DwarfAccelTable AccelNamespace;
332 DwarfAccelTable AccelTypes;
334 MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &);
336 void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
338 const SmallVectorImpl<std::unique_ptr<DwarfUnit>> &getUnits() {
339 return InfoHolder.getUnits();
340 }
342 /// \brief Find abstract variable associated with Var.
343 DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc);
345 /// \brief Find DIE for the given subprogram and attach appropriate
346 /// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global
347 /// variables in this scope then create and insert DIEs for these
348 /// variables.
349 DIE *updateSubprogramScopeDIE(DwarfCompileUnit &SPCU, DISubprogram SP);
351 /// \brief A helper function to check whether the DIE for a given Scope is
352 /// going to be null.
353 bool isLexicalScopeDIENull(LexicalScope *Scope);
355 /// \brief A helper function to construct a RangeSpanList for a given
356 /// lexical scope.
357 void addScopeRangeList(DwarfCompileUnit &TheCU, DIE &ScopeDIE,
358 const SmallVectorImpl<InsnRange> &Range);
360 /// \brief Construct new DW_TAG_lexical_block for this scope and
361 /// attach DW_AT_low_pc/DW_AT_high_pc labels.
362 DIE *constructLexicalScopeDIE(DwarfCompileUnit &TheCU, LexicalScope *Scope);
364 /// \brief This scope represents inlined body of a function. Construct
365 /// DIE to represent this concrete inlined copy of the function.
366 DIE *constructInlinedScopeDIE(DwarfCompileUnit &TheCU, LexicalScope *Scope);
368 /// \brief Construct a DIE for this scope.
369 DIE *constructScopeDIE(DwarfCompileUnit &TheCU, LexicalScope *Scope);
370 /// A helper function to create children of a Scope DIE.
371 DIE *createScopeChildrenDIE(DwarfCompileUnit &TheCU, LexicalScope *Scope,
372 SmallVectorImpl<std::unique_ptr<DIE>> &Children);
374 /// \brief Emit initial Dwarf sections with a label at the start of each one.
375 void emitSectionLabels();
377 /// \brief Compute the size and offset of a DIE given an incoming Offset.
378 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset);
380 /// \brief Compute the size and offset of all the DIEs.
381 void computeSizeAndOffsets();
383 /// \brief Attach DW_AT_inline attribute with inlined subprogram DIEs.
384 void computeInlinedDIEs();
386 /// \brief Collect info for variables that were optimized out.
387 void collectDeadVariables();
389 /// \brief Finish off debug information after all functions have been
390 /// processed.
391 void finalizeModuleInfo();
393 /// \brief Emit labels to close any remaining sections that have been left
394 /// open.
395 void endSections();
397 /// \brief Emit the debug info section.
398 void emitDebugInfo();
400 /// \brief Emit the abbreviation section.
401 void emitAbbreviations();
403 /// \brief Emit the last address of the section and the end of
404 /// the line matrix.
405 void emitEndOfLineMatrix(unsigned SectionEnd);
407 /// \brief Emit visible names into a hashed accelerator table section.
408 void emitAccelNames();
410 /// \brief Emit objective C classes and categories into a hashed
411 /// accelerator table section.
412 void emitAccelObjC();
414 /// \brief Emit namespace dies into a hashed accelerator table.
415 void emitAccelNamespaces();
417 /// \brief Emit type dies into a hashed accelerator table.
418 void emitAccelTypes();
420 /// \brief Emit visible names into a debug pubnames section.
421 /// \param GnuStyle determines whether or not we want to emit
422 /// additional information into the table ala newer gcc for gdb
423 /// index.
424 void emitDebugPubNames(bool GnuStyle = false);
426 /// \brief Emit visible types into a debug pubtypes section.
427 /// \param GnuStyle determines whether or not we want to emit
428 /// additional information into the table ala newer gcc for gdb
429 /// index.
430 void emitDebugPubTypes(bool GnuStyle = false);
432 void
433 emitDebugPubSection(bool GnuStyle, const MCSection *PSec, StringRef Name,
434 const StringMap<const DIE *> &(DwarfUnit::*Accessor)()
435 const);
437 /// \brief Emit visible names into a debug str section.
438 void emitDebugStr();
440 /// \brief Emit visible names into a debug loc section.
441 void emitDebugLoc();
443 /// \brief Emit visible names into a debug loc dwo section.
444 void emitDebugLocDWO();
446 /// \brief Emit visible names into a debug aranges section.
447 void emitDebugARanges();
449 /// \brief Emit visible names into a debug ranges section.
450 void emitDebugRanges();
452 /// \brief Emit inline info using custom format.
453 void emitDebugInlineInfo();
455 /// DWARF 5 Experimental Split Dwarf Emitters
457 /// \brief Initialize common features of skeleton units.
458 void initSkeletonUnit(const DwarfUnit &U, DIE &Die,
459 std::unique_ptr<DwarfUnit> NewU);
461 /// \brief Construct the split debug info compile unit for the debug info
462 /// section.
463 DwarfCompileUnit &constructSkeletonCU(const DwarfCompileUnit &CU);
465 /// \brief Construct the split debug info compile unit for the debug info
466 /// section.
467 DwarfTypeUnit &constructSkeletonTU(DwarfTypeUnit &TU);
469 /// \brief Emit the debug info dwo section.
470 void emitDebugInfoDWO();
472 /// \brief Emit the debug abbrev dwo section.
473 void emitDebugAbbrevDWO();
475 /// \brief Emit the debug line dwo section.
476 void emitDebugLineDWO();
478 /// \brief Emit the debug str dwo section.
479 void emitDebugStrDWO();
481 /// Flags to let the linker know we have emitted new style pubnames. Only
482 /// emit it here if we don't have a skeleton CU for split dwarf.
483 void addGnuPubAttributes(DwarfUnit &U, DIE &D) const;
485 /// \brief Create new DwarfCompileUnit for the given metadata node with tag
486 /// DW_TAG_compile_unit.
487 DwarfCompileUnit &constructDwarfCompileUnit(DICompileUnit DIUnit);
489 /// \brief Construct subprogram DIE.
490 void constructSubprogramDIE(DwarfCompileUnit &TheCU, const MDNode *N);
492 /// \brief Construct imported_module or imported_declaration DIE.
493 void constructImportedEntityDIE(DwarfCompileUnit &TheCU, const MDNode *N);
495 /// \brief Construct import_module DIE.
496 void constructImportedEntityDIE(DwarfCompileUnit &TheCU, const MDNode *N,
497 DIE *Context);
499 /// \brief Construct import_module DIE.
500 void constructImportedEntityDIE(DwarfCompileUnit &TheCU,
501 const DIImportedEntity &Module, DIE *Context);
503 /// \brief Register a source line with debug info. Returns the unique
504 /// label that was emitted and which provides correspondence to the
505 /// source line list.
506 void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
507 unsigned Flags);
509 /// \brief Indentify instructions that are marking the beginning of or
510 /// ending of a scope.
511 void identifyScopeMarkers();
513 /// \brief If Var is an current function argument that add it in
514 /// CurrentFnArguments list.
515 bool addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope);
517 /// \brief Populate LexicalScope entries with variables' info.
518 void collectVariableInfo(SmallPtrSet<const MDNode *, 16> &ProcessedVars);
520 /// \brief Collect variable information from the side table maintained
521 /// by MMI.
522 void collectVariableInfoFromMMITable(SmallPtrSet<const MDNode *, 16> &P);
524 /// \brief Ensure that a label will be emitted before MI.
525 void requestLabelBeforeInsn(const MachineInstr *MI) {
526 LabelsBeforeInsn.insert(std::make_pair(MI, (MCSymbol *)0));
527 }
529 /// \brief Return Label preceding the instruction.
530 MCSymbol *getLabelBeforeInsn(const MachineInstr *MI);
532 /// \brief Ensure that a label will be emitted after MI.
533 void requestLabelAfterInsn(const MachineInstr *MI) {
534 LabelsAfterInsn.insert(std::make_pair(MI, (MCSymbol *)0));
535 }
537 /// \brief Return Label immediately following the instruction.
538 MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
540 void attachLowHighPC(DwarfCompileUnit &Unit, DIE &D, MCSymbol *Begin,
541 MCSymbol *End);
543 public:
544 //===--------------------------------------------------------------------===//
545 // Main entry points.
546 //
547 DwarfDebug(AsmPrinter *A, Module *M);
549 void insertDIE(const MDNode *TypeMD, DIE *Die) {
550 MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
551 }
552 DIE *getDIE(const MDNode *TypeMD) {
553 return MDTypeNodeToDieMap.lookup(TypeMD);
554 }
556 /// \brief Emit all Dwarf sections that should come prior to the
557 /// content.
558 void beginModule();
560 /// \brief Emit all Dwarf sections that should come after the content.
561 void endModule() override;
563 /// \brief Gather pre-function debug information.
564 void beginFunction(const MachineFunction *MF) override;
566 /// \brief Gather and emit post-function debug information.
567 void endFunction(const MachineFunction *MF) override;
569 /// \brief Process beginning of an instruction.
570 void beginInstruction(const MachineInstr *MI) override;
572 /// \brief Process end of an instruction.
573 void endInstruction() override;
575 /// \brief Add a DIE to the set of types that we're going to pull into
576 /// type units.
577 void addDwarfTypeUnitType(DwarfCompileUnit &CU, StringRef Identifier,
578 DIE &Die, DICompositeType CTy);
580 /// \brief Add a label so that arange data can be generated for it.
581 void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); }
583 /// \brief For symbols that have a size designated (e.g. common symbols),
584 /// this tracks that size.
585 void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {
586 SymSize[Sym] = Size;
587 }
589 /// \brief Recursively Emits a debug information entry.
590 void emitDIE(DIE &Die);
592 // Experimental DWARF5 features.
594 /// \brief Returns whether or not to emit tables that dwarf consumers can
595 /// use to accelerate lookup.
596 bool useDwarfAccelTables() const { return HasDwarfAccelTables; }
598 /// \brief Returns whether or not to change the current debug info for the
599 /// split dwarf proposal support.
600 bool useSplitDwarf() const { return HasSplitDwarf; }
602 /// Returns the Dwarf Version.
603 unsigned getDwarfVersion() const { return DwarfVersion; }
605 /// Returns the section symbol for the .debug_loc section.
606 MCSymbol *getDebugLocSym() const { return DwarfDebugLocSectionSym; }
608 /// Returns the previous section that was emitted into.
609 const MCSection *getPrevSection() const { return PrevSection; }
611 /// Returns the previous CU that was being updated
612 const DwarfCompileUnit *getPrevCU() const { return PrevCU; }
614 /// Returns the entries for the .debug_loc section.
615 const SmallVectorImpl<DebugLocList> &
616 getDebugLocEntries() const {
617 return DotDebugLocEntries;
618 }
620 /// \brief Emit an entry for the debug loc section. This can be used to
621 /// handle an entry that's going to be emitted into the debug loc section.
622 void emitDebugLocEntry(ByteStreamer &Streamer, const DebugLocEntry &Entry);
624 /// Emit the location for a debug loc entry, including the size header.
625 void emitDebugLocEntryLocation(const DebugLocEntry &Entry);
627 /// Find the MDNode for the given reference.
628 template <typename T> T resolve(DIRef<T> Ref) const {
629 return Ref.resolve(TypeIdentifierMap);
630 }
632 /// \brief Return the TypeIdentifierMap.
633 const DITypeIdentifierMap &getTypeIdentifierMap() const {
634 return TypeIdentifierMap;
635 }
637 /// Find the DwarfCompileUnit for the given CU Die.
638 DwarfCompileUnit *lookupUnit(const DIE *CU) const {
639 return CUDieMap.lookup(CU);
640 }
641 /// isSubprogramContext - Return true if Context is either a subprogram
642 /// or another context nested inside a subprogram.
643 bool isSubprogramContext(const MDNode *Context);
645 void addSubprogramNames(DISubprogram SP, DIE &Die);
647 AddressPool &getAddressPool() { return AddrPool; }
649 void addAccelName(StringRef Name, const DIE &Die);
651 void addAccelObjC(StringRef Name, const DIE &Die);
653 void addAccelNamespace(StringRef Name, const DIE &Die);
655 void addAccelType(StringRef Name, const DIE &Die, char Flags);
656 };
657 } // End of namespace llvm
659 #endif