1 //===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing dwarf debug info into asm files.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H
15 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H
17 #include "DwarfFile.h"
18 #include "AsmPrinterHandler.h"
20 #include "DbgValueHistoryCalculator.h"
21 #include "DebugLocEntry.h"
22 #include "DebugLocList.h"
23 #include "DwarfAccelTable.h"
24 #include "llvm/ADT/DenseMap.h"
25 #include "llvm/ADT/MapVector.h"
26 #include "llvm/ADT/SmallPtrSet.h"
27 #include "llvm/ADT/StringMap.h"
28 #include "llvm/ADT/FoldingSet.h"
29 #include "llvm/CodeGen/LexicalScopes.h"
30 #include "llvm/CodeGen/MachineInstr.h"
31 #include "llvm/IR/DebugInfo.h"
32 #include "llvm/IR/DebugLoc.h"
33 #include "llvm/MC/MachineLocation.h"
34 #include "llvm/MC/MCDwarf.h"
35 #include "llvm/Support/Allocator.h"
45 class DwarfCompileUnit;
49 class MachineModuleInfo;
51 //===----------------------------------------------------------------------===//
52 /// \brief This class is used to record source line correspondence.
54 unsigned Line; // Source line number.
55 unsigned Column; // Source column.
56 unsigned SourceID; // Source ID number.
57 MCSymbol *Label; // Label in code ID number.
59 SrcLineInfo(unsigned L, unsigned C, unsigned S, MCSymbol *label)
60 : Line(L), Column(C), SourceID(S), Label(label) {}
63 unsigned getLine() const { return Line; }
64 unsigned getColumn() const { return Column; }
65 unsigned getSourceID() const { return SourceID; }
66 MCSymbol *getLabel() const { return Label; }
69 //===----------------------------------------------------------------------===//
70 /// \brief This class is used to track local variable information.
72 DIVariable Var; // Variable Descriptor.
73 DIExpression Expr; // Complex address location expression.
74 DIE *TheDIE; // Variable DIE.
75 unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries.
76 const MachineInstr *MInsn; // DBG_VALUE instruction of the variable.
81 /// Construct a DbgVariable from a DIVariable.
82 DbgVariable(DIVariable V, DIExpression E, DwarfDebug *DD)
83 : Var(V), Expr(E), TheDIE(nullptr), DotDebugLocOffset(~0U),
84 MInsn(nullptr), FrameIndex(~0), DD(DD) {
85 assert(Var.Verify() && Expr.Verify());
88 /// Construct a DbgVariable from a DEBUG_VALUE.
89 /// AbstractVar may be NULL.
90 DbgVariable(const MachineInstr *DbgValue, DwarfDebug *DD)
91 : Var(DbgValue->getDebugVariable()), Expr(DbgValue->getDebugExpression()),
92 TheDIE(nullptr), DotDebugLocOffset(~0U), MInsn(DbgValue),
93 FrameIndex(~0), DD(DD) {}
96 DIVariable getVariable() const { return Var; }
97 DIExpression getExpression() const { return Expr; }
98 void setDIE(DIE &D) { TheDIE = &D; }
99 DIE *getDIE() const { return TheDIE; }
100 void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; }
101 unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; }
102 StringRef getName() const { return Var.getName(); }
103 const MachineInstr *getMInsn() const { return MInsn; }
104 int getFrameIndex() const { return FrameIndex; }
105 void setFrameIndex(int FI) { FrameIndex = FI; }
106 // Translate tag to proper Dwarf tag.
107 dwarf::Tag getTag() const {
108 if (Var.getTag() == dwarf::DW_TAG_arg_variable)
109 return dwarf::DW_TAG_formal_parameter;
111 return dwarf::DW_TAG_variable;
113 /// \brief Return true if DbgVariable is artificial.
114 bool isArtificial() const {
115 if (Var.isArtificial())
117 if (getType().isArtificial())
122 bool isObjectPointer() const {
123 if (Var.isObjectPointer())
125 if (getType().isObjectPointer())
130 bool variableHasComplexAddress() const {
131 assert(Var.isVariable() && "Invalid complex DbgVariable!");
132 return Expr.getNumElements() > 0;
134 bool isBlockByrefVariable() const;
135 unsigned getNumAddrElements() const {
136 assert(Var.isVariable() && "Invalid complex DbgVariable!");
137 return Expr.getNumElements();
139 uint64_t getAddrElement(unsigned i) const { return Expr.getElement(i); }
140 DIType getType() const;
143 /// resolve - Look in the DwarfDebug map for the MDNode that
144 /// corresponds to the reference.
145 template <typename T> T resolve(DIRef<T> Ref) const;
149 /// \brief Helper used to pair up a symbol and its DWARF compile unit.
151 SymbolCU(DwarfCompileUnit *CU, const MCSymbol *Sym) : Sym(Sym), CU(CU) {}
153 DwarfCompileUnit *CU;
156 /// \brief Collects and handles dwarf debug information.
157 class DwarfDebug : public AsmPrinterHandler {
158 // Target of Dwarf emission.
161 // Collected machine module information.
162 MachineModuleInfo *MMI;
164 // All DIEValues are allocated through this allocator.
165 BumpPtrAllocator DIEValueAllocator;
167 // Handle to the compile unit used for the inline extension handling,
168 // this is just so that the DIEValue allocator has a place to store
169 // the particular elements.
170 // FIXME: Store these off of DwarfDebug instead?
171 DwarfCompileUnit *FirstCU;
173 // Maps MDNode with its corresponding DwarfCompileUnit.
174 MapVector<const MDNode *, DwarfCompileUnit *> CUMap;
176 // Maps subprogram MDNode with its corresponding DwarfCompileUnit.
177 DenseMap<const MDNode *, DwarfCompileUnit *> SPMap;
179 // Maps a CU DIE with its corresponding DwarfCompileUnit.
180 DenseMap<const DIE *, DwarfCompileUnit *> CUDieMap;
182 /// Maps MDNodes for type system with the corresponding DIEs. These DIEs can
183 /// be shared across CUs, that is why we keep the map here instead
184 /// of in DwarfCompileUnit.
185 DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap;
187 // List of all labels used in aranges generation.
188 std::vector<SymbolCU> ArangeLabels;
190 // Size of each symbol emitted (for those symbols that have a specific size).
191 DenseMap<const MCSymbol *, uint64_t> SymSize;
193 // Provides a unique id per text section.
194 typedef DenseMap<const MCSection *, SmallVector<SymbolCU, 8> > SectionMapType;
195 SectionMapType SectionMap;
197 // List of arguments for current function.
198 SmallVector<DbgVariable *, 8> CurrentFnArguments;
200 LexicalScopes LScopes;
202 // Collection of abstract subprogram DIEs.
203 DenseMap<const MDNode *, DIE *> AbstractSPDies;
205 // Collection of dbg variables of a scope.
206 typedef DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> >
208 ScopeVariablesMap ScopeVariables;
210 // Collection of abstract variables.
211 DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> AbstractVariables;
212 SmallVector<std::unique_ptr<DbgVariable>, 64> ConcreteVariables;
214 // Collection of DebugLocEntry. Stored in a linked list so that DIELocLists
215 // can refer to them in spite of insertions into this list.
216 SmallVector<DebugLocList, 4> DotDebugLocEntries;
218 // This is a collection of subprogram MDNodes that are processed to
220 SmallPtrSet<const MDNode *, 16> ProcessedSPNodes;
222 // Maps instruction with label emitted before instruction.
223 DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn;
225 // Maps instruction with label emitted after instruction.
226 DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
228 // History of DBG_VALUE and clobber instructions for each user variable.
229 // Variables are listed in order of appearance.
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;
237 // This location indicates end of function prologue and beginning of function
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 CU in which the previous subprogram was contained.
248 const DwarfCompileUnit *PrevCU;
250 // Section Symbols: these are assembler temporary labels that are emitted at
251 // the beginning of each supported dwarf section. These are used to form
252 // section offsets and are created by EmitSectionLabels.
253 MCSymbol *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
254 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym;
255 MCSymbol *DwarfDebugLocSectionSym, *DwarfLineSectionSym, *DwarfAddrSectionSym;
256 MCSymbol *FunctionBeginSym, *FunctionEndSym;
257 MCSymbol *DwarfInfoDWOSectionSym, *DwarfAbbrevDWOSectionSym;
258 MCSymbol *DwarfTypesDWOSectionSym;
259 MCSymbol *DwarfStrDWOSectionSym;
260 MCSymbol *DwarfGnuPubNamesSectionSym, *DwarfGnuPubTypesSectionSym;
262 // As an optimization, there is no need to emit an entry in the directory
263 // table for the same directory as DW_AT_comp_dir.
264 StringRef CompilationDir;
266 // Counter for assigning globally unique IDs for ranges.
267 unsigned GlobalRangeCount;
269 // Holder for the file specific debug information.
270 DwarfFile InfoHolder;
272 // Holders for the various debug information flags that we might need to
273 // have exposed. See accessor functions below for description.
275 // Holder for imported entities.
276 typedef SmallVector<std::pair<const MDNode *, const MDNode *>, 32>
278 ImportedEntityMap ScopesWithImportedEntities;
280 // Map from MDNodes for user-defined types to the type units that describe
282 DenseMap<const MDNode *, const DwarfTypeUnit *> DwarfTypeUnits;
284 SmallVector<std::pair<std::unique_ptr<DwarfTypeUnit>, DICompositeType>, 1> TypeUnitsUnderConstruction;
286 // Whether to emit the pubnames/pubtypes sections.
287 bool HasDwarfPubSections;
289 // Whether or not to use AT_ranges for compilation units.
292 // Whether we emitted a function into a section other than the default
294 bool UsedNonDefaultText;
296 // Version of dwarf we're emitting.
297 unsigned DwarfVersion;
299 // Maps from a type identifier to the actual MDNode.
300 DITypeIdentifierMap TypeIdentifierMap;
302 // DWARF5 Experimental Options
303 bool HasDwarfAccelTables;
306 // Separated Dwarf Variables
307 // In general these will all be for bits that are left in the
308 // original object file, rather than things that are meant
309 // to be in the .dwo sections.
311 // Holder for the skeleton information.
312 DwarfFile SkeletonHolder;
314 /// Store file names for type units under fission in a line table header that
315 /// will be emitted into debug_line.dwo.
316 // FIXME: replace this with a map from comp_dir to table so that we can emit
317 // multiple tables during LTO each of which uses directory 0, referencing the
318 // comp_dir of all the type units that use it.
319 MCDwarfDwoLineTable SplitTypeUnitFileTable;
321 // True iff there are multiple CUs in this module.
325 AddressPool AddrPool;
327 DwarfAccelTable AccelNames;
328 DwarfAccelTable AccelObjC;
329 DwarfAccelTable AccelNamespace;
330 DwarfAccelTable AccelTypes;
332 DenseMap<const Function *, DISubprogram> FunctionDIs;
334 MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &);
336 void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
338 const SmallVectorImpl<std::unique_ptr<DwarfUnit>> &getUnits() {
339 return InfoHolder.getUnits();
342 /// \brief Find abstract variable associated with Var.
343 DbgVariable *getExistingAbstractVariable(const DIVariable &DV,
344 DIVariable &Cleansed);
345 DbgVariable *getExistingAbstractVariable(const DIVariable &DV);
346 void createAbstractVariable(const DIVariable &DV, LexicalScope *Scope);
347 void ensureAbstractVariableIsCreated(const DIVariable &Var,
348 const MDNode *Scope);
349 void ensureAbstractVariableIsCreatedIfScoped(const DIVariable &Var,
350 const MDNode *Scope);
352 /// \brief Construct a DIE for this abstract scope.
353 void constructAbstractSubprogramScopeDIE(LexicalScope *Scope);
355 /// \brief Emit initial Dwarf sections with a label at the start of each one.
356 void emitSectionLabels();
358 /// \brief Compute the size and offset of a DIE given an incoming Offset.
359 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset);
361 /// \brief Compute the size and offset of all the DIEs.
362 void computeSizeAndOffsets();
364 /// \brief Collect info for variables that were optimized out.
365 void collectDeadVariables();
367 void finishVariableDefinitions();
369 void finishSubprogramDefinitions();
371 /// \brief Finish off debug information after all functions have been
373 void finalizeModuleInfo();
375 /// \brief Emit labels to close any remaining sections that have been left
379 /// \brief Emit the debug info section.
380 void emitDebugInfo();
382 /// \brief Emit the abbreviation section.
383 void emitAbbreviations();
385 /// \brief Emit the last address of the section and the end of
387 void emitEndOfLineMatrix(unsigned SectionEnd);
389 /// \brief Emit a specified accelerator table.
390 void emitAccel(DwarfAccelTable &Accel, const MCSection *Section,
391 StringRef TableName, StringRef SymName);
393 /// \brief Emit visible names into a hashed accelerator table section.
394 void emitAccelNames();
396 /// \brief Emit objective C classes and categories into a hashed
397 /// accelerator table section.
398 void emitAccelObjC();
400 /// \brief Emit namespace dies into a hashed accelerator table.
401 void emitAccelNamespaces();
403 /// \brief Emit type dies into a hashed accelerator table.
404 void emitAccelTypes();
406 /// \brief Emit visible names into a debug pubnames section.
407 /// \param GnuStyle determines whether or not we want to emit
408 /// additional information into the table ala newer gcc for gdb
410 void emitDebugPubNames(bool GnuStyle = false);
412 /// \brief Emit visible types into a debug pubtypes section.
413 /// \param GnuStyle determines whether or not we want to emit
414 /// additional information into the table ala newer gcc for gdb
416 void emitDebugPubTypes(bool GnuStyle = false);
419 emitDebugPubSection(bool GnuStyle, const MCSection *PSec, StringRef Name,
420 const StringMap<const DIE *> &(DwarfUnit::*Accessor)()
423 /// \brief Emit visible names into a debug str section.
426 /// \brief Emit visible names into a debug loc section.
429 /// \brief Emit visible names into a debug loc dwo section.
430 void emitDebugLocDWO();
432 /// \brief Emit visible names into a debug aranges section.
433 void emitDebugARanges();
435 /// \brief Emit visible names into a debug ranges section.
436 void emitDebugRanges();
438 /// \brief Emit inline info using custom format.
439 void emitDebugInlineInfo();
441 /// DWARF 5 Experimental Split Dwarf Emitters
443 /// \brief Initialize common features of skeleton units.
444 void initSkeletonUnit(const DwarfUnit &U, DIE &Die,
445 std::unique_ptr<DwarfUnit> NewU);
447 /// \brief Construct the split debug info compile unit for the debug info
449 DwarfCompileUnit &constructSkeletonCU(const DwarfCompileUnit &CU);
451 /// \brief Construct the split debug info compile unit for the debug info
453 DwarfTypeUnit &constructSkeletonTU(DwarfTypeUnit &TU);
455 /// \brief Emit the debug info dwo section.
456 void emitDebugInfoDWO();
458 /// \brief Emit the debug abbrev dwo section.
459 void emitDebugAbbrevDWO();
461 /// \brief Emit the debug line dwo section.
462 void emitDebugLineDWO();
464 /// \brief Emit the debug str dwo section.
465 void emitDebugStrDWO();
467 /// Flags to let the linker know we have emitted new style pubnames. Only
468 /// emit it here if we don't have a skeleton CU for split dwarf.
469 void addGnuPubAttributes(DwarfUnit &U, DIE &D) const;
471 /// \brief Create new DwarfCompileUnit for the given metadata node with tag
472 /// DW_TAG_compile_unit.
473 DwarfCompileUnit &constructDwarfCompileUnit(DICompileUnit DIUnit);
475 /// \brief Construct imported_module or imported_declaration DIE.
476 void constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU,
479 /// \brief Register a source line with debug info. Returns the unique
480 /// label that was emitted and which provides correspondence to the
481 /// source line list.
482 void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
485 /// \brief Indentify instructions that are marking the beginning of or
486 /// ending of a scope.
487 void identifyScopeMarkers();
489 /// \brief If Var is an current function argument that add it in
490 /// CurrentFnArguments list.
491 bool addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope);
493 /// \brief Populate LexicalScope entries with variables' info.
494 void collectVariableInfo(SmallPtrSetImpl<const MDNode *> &ProcessedVars);
496 /// \brief Build the location list for all DBG_VALUEs in the
497 /// function that describe the same variable.
498 void buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc,
499 const DbgValueHistoryMap::InstrRanges &Ranges);
501 /// \brief Collect variable information from the side table maintained
503 void collectVariableInfoFromMMITable(SmallPtrSetImpl<const MDNode *> &P);
505 /// \brief Ensure that a label will be emitted before MI.
506 void requestLabelBeforeInsn(const MachineInstr *MI) {
507 LabelsBeforeInsn.insert(std::make_pair(MI, nullptr));
510 /// \brief Ensure that a label will be emitted after MI.
511 void requestLabelAfterInsn(const MachineInstr *MI) {
512 LabelsAfterInsn.insert(std::make_pair(MI, nullptr));
516 //===--------------------------------------------------------------------===//
517 // Main entry points.
519 DwarfDebug(AsmPrinter *A, Module *M);
521 ~DwarfDebug() override;
523 void insertDIE(const MDNode *TypeMD, DIE *Die) {
524 MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
526 DIE *getDIE(const MDNode *TypeMD) {
527 return MDTypeNodeToDieMap.lookup(TypeMD);
530 /// \brief Emit all Dwarf sections that should come prior to the
534 /// \brief Emit all Dwarf sections that should come after the content.
535 void endModule() override;
537 /// \brief Gather pre-function debug information.
538 void beginFunction(const MachineFunction *MF) override;
540 /// \brief Gather and emit post-function debug information.
541 void endFunction(const MachineFunction *MF) override;
543 /// \brief Process beginning of an instruction.
544 void beginInstruction(const MachineInstr *MI) override;
546 /// \brief Process end of an instruction.
547 void endInstruction() override;
549 /// \brief Add a DIE to the set of types that we're going to pull into
551 void addDwarfTypeUnitType(DwarfCompileUnit &CU, StringRef Identifier,
552 DIE &Die, DICompositeType CTy);
554 /// \brief Add a label so that arange data can be generated for it.
555 void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); }
557 /// \brief For symbols that have a size designated (e.g. common symbols),
558 /// this tracks that size.
559 void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {
563 /// \brief Recursively Emits a debug information entry.
564 void emitDIE(DIE &Die);
566 // Experimental DWARF5 features.
568 /// \brief Returns whether or not to emit tables that dwarf consumers can
569 /// use to accelerate lookup.
570 bool useDwarfAccelTables() const { return HasDwarfAccelTables; }
572 /// \brief Returns whether or not to change the current debug info for the
573 /// split dwarf proposal support.
574 bool useSplitDwarf() const { return HasSplitDwarf; }
576 /// Returns the Dwarf Version.
577 unsigned getDwarfVersion() const { return DwarfVersion; }
579 /// Returns the section symbol for the .debug_loc section.
580 MCSymbol *getDebugLocSym() const { return DwarfDebugLocSectionSym; }
582 /// Returns the section symbol for the .debug_str section.
583 MCSymbol *getDebugStrSym() const { return DwarfStrSectionSym; }
585 /// Returns the section symbol for the .debug_ranges section.
586 MCSymbol *getRangeSectionSym() const { return DwarfDebugRangeSectionSym; }
588 /// Returns the previous CU that was being updated
589 const DwarfCompileUnit *getPrevCU() const { return PrevCU; }
590 void setPrevCU(const DwarfCompileUnit *PrevCU) { this->PrevCU = PrevCU; }
592 /// Returns the entries for the .debug_loc section.
593 const SmallVectorImpl<DebugLocList> &
594 getDebugLocEntries() const {
595 return DotDebugLocEntries;
598 /// \brief Emit an entry for the debug loc section. This can be used to
599 /// handle an entry that's going to be emitted into the debug loc section.
600 void emitDebugLocEntry(ByteStreamer &Streamer, const DebugLocEntry &Entry);
601 /// \brief emit a single value for the debug loc section.
602 void emitDebugLocValue(ByteStreamer &Streamer,
603 const DebugLocEntry::Value &Value);
604 /// Emits an optimal (=sorted) sequence of DW_OP_pieces.
605 void emitLocPieces(ByteStreamer &Streamer,
606 const DITypeIdentifierMap &Map,
607 ArrayRef<DebugLocEntry::Value> Values);
609 /// Emit the location for a debug loc entry, including the size header.
610 void emitDebugLocEntryLocation(const DebugLocEntry &Entry);
612 /// Find the MDNode for the given reference.
613 template <typename T> T resolve(DIRef<T> Ref) const {
614 return Ref.resolve(TypeIdentifierMap);
617 /// \brief Return the TypeIdentifierMap.
618 const DITypeIdentifierMap &getTypeIdentifierMap() const {
619 return TypeIdentifierMap;
622 /// Find the DwarfCompileUnit for the given CU Die.
623 DwarfCompileUnit *lookupUnit(const DIE *CU) const {
624 return CUDieMap.lookup(CU);
626 /// isSubprogramContext - Return true if Context is either a subprogram
627 /// or another context nested inside a subprogram.
628 bool isSubprogramContext(const MDNode *Context);
630 void addSubprogramNames(DISubprogram SP, DIE &Die);
632 AddressPool &getAddressPool() { return AddrPool; }
634 void addAccelName(StringRef Name, const DIE &Die);
636 void addAccelObjC(StringRef Name, const DIE &Die);
638 void addAccelNamespace(StringRef Name, const DIE &Die);
640 void addAccelType(StringRef Name, const DIE &Die, char Flags);
642 const MachineFunction *getCurrentFunction() const { return CurFn; }
643 const MCSymbol *getFunctionBeginSym() const { return FunctionBeginSym; }
644 const MCSymbol *getFunctionEndSym() const { return FunctionEndSym; }
646 iterator_range<ImportedEntityMap::const_iterator>
647 findImportedEntitiesForScope(const MDNode *Scope) const {
648 return make_range(std::equal_range(
649 ScopesWithImportedEntities.begin(), ScopesWithImportedEntities.end(),
650 std::pair<const MDNode *, const MDNode *>(Scope, nullptr),
654 /// \brief A helper function to check whether the DIE for a given Scope is
655 /// going to be null.
656 bool isLexicalScopeDIENull(LexicalScope *Scope);
658 /// \brief Return Label preceding the instruction.
659 MCSymbol *getLabelBeforeInsn(const MachineInstr *MI);
661 /// \brief Return Label immediately following the instruction.
662 MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
664 // FIXME: Consider rolling ranges up into DwarfDebug since we use a single
665 // range_base anyway, so there's no need to keep them as separate per-CU range
666 // lists. (though one day we might end up with a range.dwo section, in which
667 // case it'd go to DwarfFile)
668 unsigned getNextRangeNumber() { return GlobalRangeCount++; }
670 // FIXME: Sink these functions down into DwarfFile/Dwarf*Unit.
672 DenseMap<const MDNode *, DIE *> &getAbstractSPDies() {
673 return AbstractSPDies;
676 ScopeVariablesMap &getScopeVariables() { return ScopeVariables; }
678 SmallPtrSet<const MDNode *, 16> &getProcessedSPNodes() {
679 return ProcessedSPNodes;
682 SmallVector<DbgVariable *, 8> &getCurrentFnArguments() {
683 return CurrentFnArguments;
686 } // End of namespace llvm