LLVM  9.0.0svn
DwarfCompileUnit.cpp
Go to the documentation of this file.
1 //===- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Units ------------===//
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 // This file contains support for constructing a dwarf compile unit.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "DwarfCompileUnit.h"
14 #include "AddressPool.h"
15 #include "DwarfDebug.h"
16 #include "DwarfExpression.h"
17 #include "DwarfUnit.h"
18 #include "llvm/ADT/None.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallString.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/StringRef.h"
25 #include "llvm/CodeGen/DIE.h"
33 #include "llvm/IR/DataLayout.h"
34 #include "llvm/IR/DebugInfo.h"
36 #include "llvm/IR/GlobalVariable.h"
37 #include "llvm/MC/MCSection.h"
38 #include "llvm/MC/MCStreamer.h"
39 #include "llvm/MC/MCSymbol.h"
41 #include "llvm/Support/Casting.h"
45 #include <algorithm>
46 #include <cassert>
47 #include <cstdint>
48 #include <iterator>
49 #include <memory>
50 #include <string>
51 #include <utility>
52 
53 using namespace llvm;
54 
56  AsmPrinter *A, DwarfDebug *DW,
57  DwarfFile *DWU)
58  : DwarfUnit(dwarf::DW_TAG_compile_unit, Node, A, DW, DWU), UniqueID(UID) {
59  insertDIE(Node, &getUnitDie());
60  MacroLabelBegin = Asm->createTempSymbol("cu_macro_begin");
61 }
62 
63 /// addLabelAddress - Add a dwarf label attribute data and value using
64 /// DW_FORM_addr or DW_FORM_GNU_addr_index.
66  const MCSymbol *Label) {
67  // Don't use the address pool in non-fission or in the skeleton unit itself.
68  // FIXME: Once GDB supports this, it's probably worthwhile using the address
69  // pool from the skeleton - maybe even in non-fission (possibly fewer
70  // relocations by sharing them in the pool, but we have other ideas about how
71  // to reduce the number of relocations as well/instead).
72  if ((!DD->useSplitDwarf() || !Skeleton) && DD->getDwarfVersion() < 5)
73  return addLocalLabelAddress(Die, Attribute, Label);
74 
75  if (Label)
76  DD->addArangeLabel(SymbolCU(this, Label));
77 
78  unsigned idx = DD->getAddressPool().getIndex(Label);
79  Die.addValue(DIEValueAllocator, Attribute,
80  DD->getDwarfVersion() >= 5 ? dwarf::DW_FORM_addrx
81  : dwarf::DW_FORM_GNU_addr_index,
82  DIEInteger(idx));
83 }
84 
87  const MCSymbol *Label) {
88  if (Label)
89  DD->addArangeLabel(SymbolCU(this, Label));
90 
91  if (Label)
92  Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_addr,
93  DIELabel(Label));
94  else
95  Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_addr,
96  DIEInteger(0));
97 }
98 
100  // If we print assembly, we can't separate .file entries according to
101  // compile units. Thus all files will belong to the default compile unit.
102 
103  // FIXME: add a better feature test than hasRawTextSupport. Even better,
104  // extend .file to support this.
105  unsigned CUID = Asm->OutStreamer->hasRawTextSupport() ? 0 : getUniqueID();
106  if (!File)
107  return Asm->OutStreamer->EmitDwarfFileDirective(0, "", "", nullptr, None, CUID);
108  return Asm->OutStreamer->EmitDwarfFileDirective(
109  0, File->getDirectory(), File->getFilename(), getMD5AsBytes(File),
110  File->getSource(), CUID);
111 }
112 
114  const DIGlobalVariable *GV, ArrayRef<GlobalExpr> GlobalExprs) {
115  // Check for pre-existence.
116  if (DIE *Die = getDIE(GV))
117  return Die;
118 
119  assert(GV);
120 
121  auto *GVContext = GV->getScope();
122  auto *GTy = DD->resolve(GV->getType());
123 
124  // Construct the context before querying for the existence of the DIE in
125  // case such construction creates the DIE.
126  DIE *ContextDIE = getOrCreateContextDIE(GVContext);
127 
128  // Add to map.
129  DIE *VariableDIE = &createAndAddDIE(GV->getTag(), *ContextDIE, GV);
130  DIScope *DeclContext;
131  if (auto *SDMDecl = GV->getStaticDataMemberDeclaration()) {
132  DeclContext = resolve(SDMDecl->getScope());
133  assert(SDMDecl->isStaticMember() && "Expected static member decl");
134  assert(GV->isDefinition());
135  // We need the declaration DIE that is in the static member's class.
136  DIE *VariableSpecDIE = getOrCreateStaticMemberDIE(SDMDecl);
137  addDIEEntry(*VariableDIE, dwarf::DW_AT_specification, *VariableSpecDIE);
138  // If the global variable's type is different from the one in the class
139  // member type, assume that it's more specific and also emit it.
140  if (GTy != DD->resolve(SDMDecl->getBaseType()))
141  addType(*VariableDIE, GTy);
142  } else {
143  DeclContext = GV->getScope();
144  // Add name and type.
145  addString(*VariableDIE, dwarf::DW_AT_name, GV->getDisplayName());
146  addType(*VariableDIE, GTy);
147 
148  // Add scoping info.
149  if (!GV->isLocalToUnit())
150  addFlag(*VariableDIE, dwarf::DW_AT_external);
151 
152  // Add line number info.
153  addSourceLine(*VariableDIE, GV);
154  }
155 
156  if (!GV->isDefinition())
157  addFlag(*VariableDIE, dwarf::DW_AT_declaration);
158  else
159  addGlobalName(GV->getName(), *VariableDIE, DeclContext);
160 
161  if (uint32_t AlignInBytes = GV->getAlignInBytes())
162  addUInt(*VariableDIE, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
163  AlignInBytes);
164 
165  if (MDTuple *TP = GV->getTemplateParams())
166  addTemplateParams(*VariableDIE, DINodeArray(TP));
167 
168  // Add location.
169  bool addToAccelTable = false;
170  DIELoc *Loc = nullptr;
171  Optional<unsigned> NVPTXAddressSpace;
172  std::unique_ptr<DIEDwarfExpression> DwarfExpr;
173  for (const auto &GE : GlobalExprs) {
174  const GlobalVariable *Global = GE.Var;
175  const DIExpression *Expr = GE.Expr;
176 
177  // For compatibility with DWARF 3 and earlier,
178  // DW_AT_location(DW_OP_constu, X, DW_OP_stack_value) becomes
179  // DW_AT_const_value(X).
180  if (GlobalExprs.size() == 1 && Expr && Expr->isConstant()) {
181  addToAccelTable = true;
182  addConstantValue(*VariableDIE, /*Unsigned=*/true, Expr->getElement(1));
183  break;
184  }
185 
186  // We cannot describe the location of dllimport'd variables: the
187  // computation of their address requires loads from the IAT.
188  if (Global && Global->hasDLLImportStorageClass())
189  continue;
190 
191  // Nothing to describe without address or constant.
192  if (!Global && (!Expr || !Expr->isConstant()))
193  continue;
194 
195  if (Global && Global->isThreadLocal() &&
197  continue;
198 
199  if (!Loc) {
200  addToAccelTable = true;
201  Loc = new (DIEValueAllocator) DIELoc;
202  DwarfExpr = llvm::make_unique<DIEDwarfExpression>(*Asm, *this, *Loc);
203  }
204 
205  if (Expr) {
206  // According to
207  // https://docs.nvidia.com/cuda/archive/10.0/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf
208  // cuda-gdb requires DW_AT_address_class for all variables to be able to
209  // correctly interpret address space of the variable address.
210  // Decode DW_OP_constu <DWARF Address Space> DW_OP_swap DW_OP_xderef
211  // sequence for the NVPTX + gdb target.
212  unsigned LocalNVPTXAddressSpace;
213  if (Asm->TM.getTargetTriple().isNVPTX() && DD->tuneForGDB()) {
214  const DIExpression *NewExpr =
215  DIExpression::extractAddressClass(Expr, LocalNVPTXAddressSpace);
216  if (NewExpr != Expr) {
217  Expr = NewExpr;
218  NVPTXAddressSpace = LocalNVPTXAddressSpace;
219  }
220  }
221  DwarfExpr->addFragmentOffset(Expr);
222  }
223 
224  if (Global) {
225  const MCSymbol *Sym = Asm->getSymbol(Global);
226  if (Global->isThreadLocal()) {
227  if (Asm->TM.useEmulatedTLS()) {
228  // TODO: add debug info for emulated thread local mode.
229  } else {
230  // FIXME: Make this work with -gsplit-dwarf.
231  unsigned PointerSize = Asm->getDataLayout().getPointerSize();
232  assert((PointerSize == 4 || PointerSize == 8) &&
233  "Add support for other sizes if necessary");
234  // Based on GCC's support for TLS:
235  if (!DD->useSplitDwarf()) {
236  // 1) Start with a constNu of the appropriate pointer size
237  addUInt(*Loc, dwarf::DW_FORM_data1,
238  PointerSize == 4 ? dwarf::DW_OP_const4u
239  : dwarf::DW_OP_const8u);
240  // 2) containing the (relocated) offset of the TLS variable
241  // within the module's TLS block.
242  addExpr(*Loc, dwarf::DW_FORM_udata,
244  } else {
245  addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
246  addUInt(*Loc, dwarf::DW_FORM_udata,
247  DD->getAddressPool().getIndex(Sym, /* TLS */ true));
248  }
249  // 3) followed by an OP to make the debugger do a TLS lookup.
250  addUInt(*Loc, dwarf::DW_FORM_data1,
251  DD->useGNUTLSOpcode() ? dwarf::DW_OP_GNU_push_tls_address
252  : dwarf::DW_OP_form_tls_address);
253  }
254  } else {
255  DD->addArangeLabel(SymbolCU(this, Sym));
256  addOpAddress(*Loc, Sym);
257  }
258  }
259  // Global variables attached to symbols are memory locations.
260  // It would be better if this were unconditional, but malformed input that
261  // mixes non-fragments and fragments for the same variable is too expensive
262  // to detect in the verifier.
263  if (DwarfExpr->isUnknownLocation())
264  DwarfExpr->setMemoryLocationKind();
265  DwarfExpr->addExpression(Expr);
266  }
267  if (Asm->TM.getTargetTriple().isNVPTX() && DD->tuneForGDB()) {
268  // According to
269  // https://docs.nvidia.com/cuda/archive/10.0/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf
270  // cuda-gdb requires DW_AT_address_class for all variables to be able to
271  // correctly interpret address space of the variable address.
272  const unsigned NVPTX_ADDR_global_space = 5;
273  addUInt(*VariableDIE, dwarf::DW_AT_address_class, dwarf::DW_FORM_data1,
274  NVPTXAddressSpace ? *NVPTXAddressSpace : NVPTX_ADDR_global_space);
275  }
276  if (Loc)
277  addBlock(*VariableDIE, dwarf::DW_AT_location, DwarfExpr->finalize());
278 
279  if (DD->useAllLinkageNames())
280  addLinkageName(*VariableDIE, GV->getLinkageName());
281 
282  if (addToAccelTable) {
283  DD->addAccelName(*CUNode, GV->getName(), *VariableDIE);
284 
285  // If the linkage name is different than the name, go ahead and output
286  // that as well into the name table.
287  if (GV->getLinkageName() != "" && GV->getName() != GV->getLinkageName() &&
289  DD->addAccelName(*CUNode, GV->getLinkageName(), *VariableDIE);
290  }
291 
292  return VariableDIE;
293 }
294 
296  bool SameAsPrevCU = this == DD->getPrevCU();
297  DD->setPrevCU(this);
298  // If we have no current ranges just add the range and return, otherwise,
299  // check the current section and CU against the previous section and CU we
300  // emitted into and the subprogram was contained within. If these are the
301  // same then extend our current range, otherwise add this as a new range.
302  if (CURanges.empty() || !SameAsPrevCU ||
303  (&CURanges.back().getEnd()->getSection() !=
304  &Range.getEnd()->getSection())) {
305  CURanges.push_back(Range);
306  DD->addSectionLabel(Range.getStart());
307  return;
308  }
309 
310  CURanges.back().setEnd(Range.getEnd());
311 }
312 
315  return;
316 
317  // Define start line table label for each Compile Unit.
318  MCSymbol *LineTableStartSym;
320  if (DD->useSectionsAsReferences()) {
321  LineTableStartSym = TLOF.getDwarfLineSection()->getBeginSymbol();
322  } else {
323  LineTableStartSym =
324  Asm->OutStreamer->getDwarfLineTableSymbol(getUniqueID());
325  }
326 
327  // DW_AT_stmt_list is a offset of line number information for this
328  // compile unit in debug_line section. For split dwarf this is
329  // left in the skeleton CU and so not included.
330  // The line table entries are not always emitted in assembly, so it
331  // is not okay to use line_table_start here.
332  StmtListValue =
333  addSectionLabel(getUnitDie(), dwarf::DW_AT_stmt_list, LineTableStartSym,
335 }
336 
338  D.addValue(DIEValueAllocator, *StmtListValue);
339 }
340 
342  const MCSymbol *End) {
343  assert(Begin && "Begin label should not be null!");
344  assert(End && "End label should not be null!");
345  assert(Begin->isDefined() && "Invalid starting label");
346  assert(End->isDefined() && "Invalid end label");
347 
348  addLabelAddress(D, dwarf::DW_AT_low_pc, Begin);
349  if (DD->getDwarfVersion() < 4)
350  addLabelAddress(D, dwarf::DW_AT_high_pc, End);
351  else
352  addLabelDelta(D, dwarf::DW_AT_high_pc, End, Begin);
353 }
354 
355 // Find DIE for the given subprogram and attach appropriate DW_AT_low_pc
356 // and DW_AT_high_pc attributes. If there are global variables in this
357 // scope then create and insert DIEs for these variables.
360 
364  *DD->getCurrentFunction()))
365  addFlag(*SPDie, dwarf::DW_AT_APPLE_omit_frame_ptr);
366 
367  // Only include DW_AT_frame_base in full debug info
369  if (Asm->MF->getTarget().getTargetTriple().isNVPTX()) {
370  DIELoc *Loc = new (DIEValueAllocator) DIELoc;
371  addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_call_frame_cfa);
372  addBlock(*SPDie, dwarf::DW_AT_frame_base, Loc);
373  } else {
375  MachineLocation Location(RI->getFrameRegister(*Asm->MF));
376  if (RI->isPhysicalRegister(Location.getReg()))
377  addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
378  }
379  }
380 
381  // Add name to the name table, we do this here because we're guaranteed
382  // to have concrete versions of our DW_TAG_subprogram nodes.
383  DD->addSubprogramNames(*CUNode, SP, *SPDie);
384 
385  return *SPDie;
386 }
387 
388 // Construct a DIE for this scope.
390  LexicalScope *Scope, SmallVectorImpl<DIE *> &FinalChildren) {
391  if (!Scope || !Scope->getScopeNode())
392  return;
393 
394  auto *DS = Scope->getScopeNode();
395 
396  assert((Scope->getInlinedAt() || !isa<DISubprogram>(DS)) &&
397  "Only handle inlined subprograms here, use "
398  "constructSubprogramScopeDIE for non-inlined "
399  "subprograms");
400 
401  SmallVector<DIE *, 8> Children;
402 
403  // We try to create the scope DIE first, then the children DIEs. This will
404  // avoid creating un-used children then removing them later when we find out
405  // the scope DIE is null.
406  DIE *ScopeDIE;
407  if (Scope->getParent() && isa<DISubprogram>(DS)) {
408  ScopeDIE = constructInlinedScopeDIE(Scope);
409  if (!ScopeDIE)
410  return;
411  // We create children when the scope DIE is not null.
412  createScopeChildrenDIE(Scope, Children);
413  } else {
414  // Early exit when we know the scope DIE is going to be null.
415  if (DD->isLexicalScopeDIENull(Scope))
416  return;
417 
418  bool HasNonScopeChildren = false;
419 
420  // We create children here when we know the scope DIE is not going to be
421  // null and the children will be added to the scope DIE.
422  createScopeChildrenDIE(Scope, Children, &HasNonScopeChildren);
423 
424  // If there are only other scopes as children, put them directly in the
425  // parent instead, as this scope would serve no purpose.
426  if (!HasNonScopeChildren) {
427  FinalChildren.insert(FinalChildren.end(),
428  std::make_move_iterator(Children.begin()),
429  std::make_move_iterator(Children.end()));
430  return;
431  }
432  ScopeDIE = constructLexicalScopeDIE(Scope);
433  assert(ScopeDIE && "Scope DIE should not be null.");
434  }
435 
436  // Add children
437  for (auto &I : Children)
438  ScopeDIE->addChild(std::move(I));
439 
440  FinalChildren.push_back(std::move(ScopeDIE));
441 }
442 
446 
447  // Emit the offset into .debug_ranges or .debug_rnglists as a relocatable
448  // label. emitDIE() will handle emitting it appropriately.
449  const MCSymbol *RangeSectionSym =
450  DD->getDwarfVersion() >= 5
453 
454  HasRangeLists = true;
455 
456  // Add the range list to the set of ranges to be emitted.
457  auto IndexAndList =
458  (DD->getDwarfVersion() < 5 && Skeleton ? Skeleton->DU : DU)
459  ->addRange(*(Skeleton ? Skeleton : this), std::move(Range));
460 
461  uint32_t Index = IndexAndList.first;
462  auto &List = *IndexAndList.second;
463 
464  // Under fission, ranges are specified by constant offsets relative to the
465  // CU's DW_AT_GNU_ranges_base.
466  // FIXME: For DWARF v5, do not generate the DW_AT_ranges attribute under
467  // fission until we support the forms using the .debug_addr section
468  // (DW_RLE_startx_endx etc.).
469  if (DD->getDwarfVersion() >= 5)
470  addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_rnglistx, Index);
471  else if (isDwoUnit())
472  addSectionDelta(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
473  RangeSectionSym);
474  else
475  addSectionLabel(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
476  RangeSectionSym);
477 }
478 
480  DIE &Die, SmallVector<RangeSpan, 2> Ranges) {
481  if (Ranges.size() == 1 || !DD->useRangesSection()) {
482  const RangeSpan &Front = Ranges.front();
483  const RangeSpan &Back = Ranges.back();
484  attachLowHighPC(Die, Front.getStart(), Back.getEnd());
485  } else
486  addScopeRangeList(Die, std::move(Ranges));
487 }
488 
490  DIE &Die, const SmallVectorImpl<InsnRange> &Ranges) {
492  List.reserve(Ranges.size());
493  for (const InsnRange &R : Ranges)
494  List.push_back(RangeSpan(DD->getLabelBeforeInsn(R.first),
495  DD->getLabelAfterInsn(R.second)));
496  attachRangesOrLowHighPC(Die, std::move(List));
497 }
498 
499 // This scope represents inlined body of a function. Construct DIE to
500 // represent this concrete inlined copy of the function.
502  assert(Scope->getScopeNode());
503  auto *DS = Scope->getScopeNode();
504  auto *InlinedSP = getDISubprogram(DS);
505  // Find the subprogram's DwarfCompileUnit in the SPMap in case the subprogram
506  // was inlined from another compile unit.
507  DIE *OriginDIE = getAbstractSPDies()[InlinedSP];
508  assert(OriginDIE && "Unable to find original DIE for an inlined subprogram.");
509 
510  auto ScopeDIE = DIE::get(DIEValueAllocator, dwarf::DW_TAG_inlined_subroutine);
511  addDIEEntry(*ScopeDIE, dwarf::DW_AT_abstract_origin, *OriginDIE);
512 
513  attachRangesOrLowHighPC(*ScopeDIE, Scope->getRanges());
514 
515  // Add the call site information to the DIE.
516  const DILocation *IA = Scope->getInlinedAt();
517  addUInt(*ScopeDIE, dwarf::DW_AT_call_file, None,
518  getOrCreateSourceID(IA->getFile()));
519  addUInt(*ScopeDIE, dwarf::DW_AT_call_line, None, IA->getLine());
520  if (IA->getDiscriminator() && DD->getDwarfVersion() >= 4)
521  addUInt(*ScopeDIE, dwarf::DW_AT_GNU_discriminator, None,
522  IA->getDiscriminator());
523 
524  // Add name to the name table, we do this here because we're guaranteed
525  // to have concrete versions of our DW_TAG_inlined_subprogram nodes.
526  DD->addSubprogramNames(*CUNode, InlinedSP, *ScopeDIE);
527 
528  return ScopeDIE;
529 }
530 
531 // Construct new DW_TAG_lexical_block for this scope and attach
532 // DW_AT_low_pc/DW_AT_high_pc labels.
534  if (DD->isLexicalScopeDIENull(Scope))
535  return nullptr;
536 
537  auto ScopeDIE = DIE::get(DIEValueAllocator, dwarf::DW_TAG_lexical_block);
538  if (Scope->isAbstractScope())
539  return ScopeDIE;
540 
541  attachRangesOrLowHighPC(*ScopeDIE, Scope->getRanges());
542 
543  return ScopeDIE;
544 }
545 
546 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
548  auto D = constructVariableDIEImpl(DV, Abstract);
549  DV.setDIE(*D);
550  return D;
551 }
552 
554  const LexicalScope &Scope) {
555  auto LabelDie = DIE::get(DIEValueAllocator, DL.getTag());
556  insertDIE(DL.getLabel(), LabelDie);
557  DL.setDIE(*LabelDie);
558 
559  if (Scope.isAbstractScope())
560  applyLabelAttributes(DL, *LabelDie);
561 
562  return LabelDie;
563 }
564 
565 DIE *DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV,
566  bool Abstract) {
567  // Define variable debug information entry.
568  auto VariableDie = DIE::get(DIEValueAllocator, DV.getTag());
569  insertDIE(DV.getVariable(), VariableDie);
570 
571  if (Abstract) {
572  applyVariableAttributes(DV, *VariableDie);
573  return VariableDie;
574  }
575 
576  // Add variable address.
577 
578  unsigned Offset = DV.getDebugLocListIndex();
579  if (Offset != ~0U) {
580  addLocationList(*VariableDie, dwarf::DW_AT_location, Offset);
581  return VariableDie;
582  }
583 
584  // Check if variable is described by a DBG_VALUE instruction.
585  if (const MachineInstr *DVInsn = DV.getMInsn()) {
586  assert(DVInsn->getNumOperands() == 4);
587  if (DVInsn->getOperand(0).isReg()) {
588  auto RegOp = DVInsn->getOperand(0);
589  auto Op1 = DVInsn->getOperand(1);
590  // If the second operand is an immediate, this is an indirect value.
591  assert((!Op1.isImm() || (Op1.getImm() == 0)) && "unexpected offset");
592  MachineLocation Location(RegOp.getReg(), Op1.isImm());
593  addVariableAddress(DV, *VariableDie, Location);
594  } else if (DVInsn->getOperand(0).isImm()) {
595  // This variable is described by a single constant.
596  // Check whether it has a DIExpression.
597  auto *Expr = DV.getSingleExpression();
598  if (Expr && Expr->getNumElements()) {
599  DIELoc *Loc = new (DIEValueAllocator) DIELoc;
600  DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
601  // If there is an expression, emit raw unsigned bytes.
602  DwarfExpr.addFragmentOffset(Expr);
603  DwarfExpr.addUnsignedConstant(DVInsn->getOperand(0).getImm());
604  DwarfExpr.addExpression(Expr);
605  addBlock(*VariableDie, dwarf::DW_AT_location, DwarfExpr.finalize());
606  } else
607  addConstantValue(*VariableDie, DVInsn->getOperand(0), DV.getType());
608  } else if (DVInsn->getOperand(0).isFPImm())
609  addConstantFPValue(*VariableDie, DVInsn->getOperand(0));
610  else if (DVInsn->getOperand(0).isCImm())
611  addConstantValue(*VariableDie, DVInsn->getOperand(0).getCImm(),
612  DV.getType());
613 
614  return VariableDie;
615  }
616 
617  // .. else use frame index.
618  if (!DV.hasFrameIndexExprs())
619  return VariableDie;
620 
621  Optional<unsigned> NVPTXAddressSpace;
622  DIELoc *Loc = new (DIEValueAllocator) DIELoc;
623  DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
624  for (auto &Fragment : DV.getFrameIndexExprs()) {
625  unsigned FrameReg = 0;
626  const DIExpression *Expr = Fragment.Expr;
628  int Offset = TFI->getFrameIndexReference(*Asm->MF, Fragment.FI, FrameReg);
629  DwarfExpr.addFragmentOffset(Expr);
631  Ops.push_back(dwarf::DW_OP_plus_uconst);
632  Ops.push_back(Offset);
633  // According to
634  // https://docs.nvidia.com/cuda/archive/10.0/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf
635  // cuda-gdb requires DW_AT_address_class for all variables to be able to
636  // correctly interpret address space of the variable address.
637  // Decode DW_OP_constu <DWARF Address Space> DW_OP_swap DW_OP_xderef
638  // sequence for the NVPTX + gdb target.
639  unsigned LocalNVPTXAddressSpace;
640  if (Asm->TM.getTargetTriple().isNVPTX() && DD->tuneForGDB()) {
641  const DIExpression *NewExpr =
642  DIExpression::extractAddressClass(Expr, LocalNVPTXAddressSpace);
643  if (NewExpr != Expr) {
644  Expr = NewExpr;
645  NVPTXAddressSpace = LocalNVPTXAddressSpace;
646  }
647  }
648  if (Expr)
649  Ops.append(Expr->elements_begin(), Expr->elements_end());
650  DIExpressionCursor Cursor(Ops);
651  DwarfExpr.setMemoryLocationKind();
652  if (const MCSymbol *FrameSymbol = Asm->getFunctionFrameSymbol())
653  addOpAddress(*Loc, FrameSymbol);
654  else
655  DwarfExpr.addMachineRegExpression(
656  *Asm->MF->getSubtarget().getRegisterInfo(), Cursor, FrameReg);
657  DwarfExpr.addExpression(std::move(Cursor));
658  }
659  if (Asm->TM.getTargetTriple().isNVPTX() && DD->tuneForGDB()) {
660  // According to
661  // https://docs.nvidia.com/cuda/archive/10.0/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf
662  // cuda-gdb requires DW_AT_address_class for all variables to be able to
663  // correctly interpret address space of the variable address.
664  const unsigned NVPTX_ADDR_local_space = 6;
665  addUInt(*VariableDie, dwarf::DW_AT_address_class, dwarf::DW_FORM_data1,
666  NVPTXAddressSpace ? *NVPTXAddressSpace : NVPTX_ADDR_local_space);
667  }
668  addBlock(*VariableDie, dwarf::DW_AT_location, DwarfExpr.finalize());
669 
670  return VariableDie;
671 }
672 
674  const LexicalScope &Scope,
675  DIE *&ObjectPointer) {
676  auto Var = constructVariableDIE(DV, Scope.isAbstractScope());
677  if (DV.isObjectPointer())
678  ObjectPointer = Var;
679  return Var;
680 }
681 
682 /// Return all DIVariables that appear in count: expressions.
685  auto *Array = dyn_cast<DICompositeType>(Var->getType());
686  if (!Array || Array->getTag() != dwarf::DW_TAG_array_type)
687  return Result;
688  for (auto *El : Array->getElements()) {
689  if (auto *Subrange = dyn_cast<DISubrange>(El)) {
690  auto Count = Subrange->getCount();
691  if (auto *Dependency = Count.dyn_cast<DIVariable *>())
692  Result.push_back(Dependency);
693  }
694  }
695  return Result;
696 }
697 
698 /// Sort local variables so that variables appearing inside of helper
699 /// expressions come first.
704  // Map back from a DIVariable to its containing DbgVariable.
706  // Set of DbgVariables in Result.
708  // For cycle detection.
710 
711  // Initialize the worklist and the DIVariable lookup table.
712  for (auto Var : reverse(Input)) {
713  DbgVar.insert({Var->getVariable(), Var});
714  WorkList.push_back({Var, 0});
715  }
716 
717  // Perform a stable topological sort by doing a DFS.
718  while (!WorkList.empty()) {
719  auto Item = WorkList.back();
720  DbgVariable *Var = Item.getPointer();
721  bool visitedAllDependencies = Item.getInt();
722  WorkList.pop_back();
723 
724  // Dependency is in a different lexical scope or a global.
725  if (!Var)
726  continue;
727 
728  // Already handled.
729  if (Visited.count(Var))
730  continue;
731 
732  // Add to Result if all dependencies are visited.
733  if (visitedAllDependencies) {
734  Visited.insert(Var);
735  Result.push_back(Var);
736  continue;
737  }
738 
739  // Detect cycles.
740  auto Res = Visiting.insert(Var);
741  if (!Res.second) {
742  assert(false && "dependency cycle in local variables");
743  return Result;
744  }
745 
746  // Push dependencies and this node onto the worklist, so that this node is
747  // visited again after all of its dependencies are handled.
748  WorkList.push_back({Var, 1});
749  for (auto *Dependency : dependencies(Var)) {
750  auto Dep = dyn_cast_or_null<const DILocalVariable>(Dependency);
751  WorkList.push_back({DbgVar[Dep], 0});
752  }
753  }
754  return Result;
755 }
756 
758  SmallVectorImpl<DIE *> &Children,
759  bool *HasNonScopeChildren) {
760  assert(Children.empty());
761  DIE *ObjectPointer = nullptr;
762 
763  // Emit function arguments (order is significant).
764  auto Vars = DU->getScopeVariables().lookup(Scope);
765  for (auto &DV : Vars.Args)
766  Children.push_back(constructVariableDIE(*DV.second, *Scope, ObjectPointer));
767 
768  // Emit local variables.
769  auto Locals = sortLocalVars(Vars.Locals);
770  for (DbgVariable *DV : Locals)
771  Children.push_back(constructVariableDIE(*DV, *Scope, ObjectPointer));
772 
773  // Skip imported directives in gmlt-like data.
775  // There is no need to emit empty lexical block DIE.
776  for (const auto *IE : ImportedEntities[Scope->getScopeNode()])
777  Children.push_back(
778  constructImportedEntityDIE(cast<DIImportedEntity>(IE)));
779  }
780 
781  if (HasNonScopeChildren)
782  *HasNonScopeChildren = !Children.empty();
783 
784  for (DbgLabel *DL : DU->getScopeLabels().lookup(Scope))
785  Children.push_back(constructLabelDIE(*DL, *Scope));
786 
787  for (LexicalScope *LS : Scope->getChildren())
788  constructScopeDIE(LS, Children);
789 
790  return ObjectPointer;
791 }
792 
794  LexicalScope *Scope) {
795  DIE &ScopeDIE = updateSubprogramScopeDIE(Sub);
796 
797  if (Scope) {
798  assert(!Scope->getInlinedAt());
799  assert(!Scope->isAbstractScope());
800  // Collect lexical scope children first.
801  // ObjectPointer might be a local (non-argument) local variable if it's a
802  // block's synthetic this pointer.
803  if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, ScopeDIE))
804  addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
805  }
806 
807  // If this is a variadic function, add an unspecified parameter.
808  DITypeRefArray FnArgs = Sub->getType()->getTypeArray();
809 
810  // If we have a single element of null, it is a function that returns void.
811  // If we have more than one elements and the last one is null, it is a
812  // variadic function.
813  if (FnArgs.size() > 1 && !FnArgs[FnArgs.size() - 1] &&
815  ScopeDIE.addChild(
816  DIE::get(DIEValueAllocator, dwarf::DW_TAG_unspecified_parameters));
817 
818  return ScopeDIE;
819 }
820 
822  DIE &ScopeDIE) {
823  // We create children when the scope DIE is not null.
824  SmallVector<DIE *, 8> Children;
825  DIE *ObjectPointer = createScopeChildrenDIE(Scope, Children);
826 
827  // Add children
828  for (auto &I : Children)
829  ScopeDIE.addChild(std::move(I));
830 
831  return ObjectPointer;
832 }
833 
835  LexicalScope *Scope) {
836  DIE *&AbsDef = getAbstractSPDies()[Scope->getScopeNode()];
837  if (AbsDef)
838  return;
839 
840  auto *SP = cast<DISubprogram>(Scope->getScopeNode());
841 
842  DIE *ContextDIE;
843  DwarfCompileUnit *ContextCU = this;
844 
846  ContextDIE = &getUnitDie();
847  // Some of this is duplicated from DwarfUnit::getOrCreateSubprogramDIE, with
848  // the important distinction that the debug node is not associated with the
849  // DIE (since the debug node will be associated with the concrete DIE, if
850  // any). It could be refactored to some common utility function.
851  else if (auto *SPDecl = SP->getDeclaration()) {
852  ContextDIE = &getUnitDie();
853  getOrCreateSubprogramDIE(SPDecl);
854  } else {
855  ContextDIE = getOrCreateContextDIE(resolve(SP->getScope()));
856  // The scope may be shared with a subprogram that has already been
857  // constructed in another CU, in which case we need to construct this
858  // subprogram in the same CU.
859  ContextCU = DD->lookupCU(ContextDIE->getUnitDie());
860  }
861 
862  // Passing null as the associated node because the abstract definition
863  // shouldn't be found by lookup.
864  AbsDef = &ContextCU->createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, nullptr);
865  ContextCU->applySubprogramAttributesToDefinition(SP, *AbsDef);
866 
867  if (!ContextCU->includeMinimalInlineScopes())
868  ContextCU->addUInt(*AbsDef, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
869  if (DIE *ObjectPointer = ContextCU->createAndAddScopeChildren(Scope, *AbsDef))
870  ContextCU->addDIEEntry(*AbsDef, dwarf::DW_AT_object_pointer, *ObjectPointer);
871 }
872 
874  const DISubprogram &CalleeSP,
875  bool IsTail,
876  const MCExpr *PCOffset) {
877  // Insert a call site entry DIE within ScopeDIE.
878  DIE &CallSiteDIE =
879  createAndAddDIE(dwarf::DW_TAG_call_site, ScopeDIE, nullptr);
880 
881  // For the purposes of showing tail call frames in backtraces, a key piece of
882  // information is DW_AT_call_origin, a pointer to the callee DIE.
883  DIE *CalleeDIE = getOrCreateSubprogramDIE(&CalleeSP);
884  assert(CalleeDIE && "Could not create DIE for call site entry origin");
885  addDIEEntry(CallSiteDIE, dwarf::DW_AT_call_origin, *CalleeDIE);
886 
887  if (IsTail) {
888  // Attach DW_AT_call_tail_call to tail calls for standards compliance.
889  addFlag(CallSiteDIE, dwarf::DW_AT_call_tail_call);
890  } else {
891  // Attach the return PC to allow the debugger to disambiguate call paths
892  // from one function to another.
893  assert(PCOffset && "Missing return PC information for a call");
894  addAddressExpr(CallSiteDIE, dwarf::DW_AT_call_return_pc, PCOffset);
895  }
896  return CallSiteDIE;
897 }
898 
900  const DIImportedEntity *Module) {
901  DIE *IMDie = DIE::get(DIEValueAllocator, (dwarf::Tag)Module->getTag());
902  insertDIE(Module, IMDie);
903  DIE *EntityDie;
904  auto *Entity = resolve(Module->getEntity());
905  if (auto *NS = dyn_cast<DINamespace>(Entity))
906  EntityDie = getOrCreateNameSpace(NS);
907  else if (auto *M = dyn_cast<DIModule>(Entity))
908  EntityDie = getOrCreateModule(M);
909  else if (auto *SP = dyn_cast<DISubprogram>(Entity))
910  EntityDie = getOrCreateSubprogramDIE(SP);
911  else if (auto *T = dyn_cast<DIType>(Entity))
912  EntityDie = getOrCreateTypeDIE(T);
913  else if (auto *GV = dyn_cast<DIGlobalVariable>(Entity))
914  EntityDie = getOrCreateGlobalVariableDIE(GV, {});
915  else
916  EntityDie = getDIE(Entity);
917  assert(EntityDie);
918  addSourceLine(*IMDie, Module->getLine(), Module->getFile());
919  addDIEEntry(*IMDie, dwarf::DW_AT_import, *EntityDie);
920  StringRef Name = Module->getName();
921  if (!Name.empty())
922  addString(*IMDie, dwarf::DW_AT_name, Name);
923 
924  return IMDie;
925 }
926 
928  DIE *D = getDIE(SP);
929  if (DIE *AbsSPDIE = getAbstractSPDies().lookup(SP)) {
930  if (D)
931  // If this subprogram has an abstract definition, reference that
932  addDIEEntry(*D, dwarf::DW_AT_abstract_origin, *AbsSPDIE);
933  } else {
935  if (D)
936  // And attach the attributes
938  }
939 }
940 
942  DbgEntity *AbsEntity = getExistingAbstractEntity(Entity->getEntity());
943 
944  auto *Die = Entity->getDIE();
945  /// Label may be used to generate DW_AT_low_pc, so put it outside
946  /// if/else block.
947  const DbgLabel *Label = nullptr;
948  if (AbsEntity && AbsEntity->getDIE()) {
949  addDIEEntry(*Die, dwarf::DW_AT_abstract_origin, *AbsEntity->getDIE());
950  Label = dyn_cast<const DbgLabel>(Entity);
951  } else {
952  if (const DbgVariable *Var = dyn_cast<const DbgVariable>(Entity))
953  applyVariableAttributes(*Var, *Die);
954  else if ((Label = dyn_cast<const DbgLabel>(Entity)))
955  applyLabelAttributes(*Label, *Die);
956  else
957  llvm_unreachable("DbgEntity must be DbgVariable or DbgLabel.");
958  }
959 
960  if (Label)
961  if (const auto *Sym = Label->getSymbol())
962  addLabelAddress(*Die, dwarf::DW_AT_low_pc, Sym);
963 }
964 
966  auto &AbstractEntities = getAbstractEntities();
967  auto I = AbstractEntities.find(Node);
968  if (I != AbstractEntities.end())
969  return I->second.get();
970  return nullptr;
971 }
972 
974  LexicalScope *Scope) {
975  assert(Scope && Scope->isAbstractScope());
976  auto &Entity = getAbstractEntities()[Node];
977  if (isa<const DILocalVariable>(Node)) {
978  Entity = llvm::make_unique<DbgVariable>(
979  cast<const DILocalVariable>(Node), nullptr /* IA */);;
980  DU->addScopeVariable(Scope, cast<DbgVariable>(Entity.get()));
981  } else if (isa<const DILabel>(Node)) {
982  Entity = llvm::make_unique<DbgLabel>(
983  cast<const DILabel>(Node), nullptr /* IA */);
984  DU->addScopeLabel(Scope, cast<DbgLabel>(Entity.get()));
985  }
986 }
987 
988 void DwarfCompileUnit::emitHeader(bool UseOffsets) {
989  // Don't bother labeling the .dwo unit, as its offset isn't used.
990  if (!Skeleton && !DD->useSectionsAsReferences()) {
991  LabelBegin = Asm->createTempSymbol("cu_begin");
992  Asm->OutStreamer->EmitLabel(LabelBegin);
993  }
994 
995  dwarf::UnitType UT = Skeleton ? dwarf::DW_UT_split_compile
996  : DD->useSplitDwarf() ? dwarf::DW_UT_skeleton
997  : dwarf::DW_UT_compile;
998  DwarfUnit::emitCommonHeader(UseOffsets, UT);
999  if (DD->getDwarfVersion() >= 5 && UT != dwarf::DW_UT_compile)
1000  Asm->emitInt64(getDWOId());
1001 }
1002 
1004  switch (CUNode->getNameTableKind()) {
1006  return false;
1007  // Opting in to GNU Pubnames/types overrides the default to ensure these are
1008  // generated for things like Gold's gdb_index generation.
1010  return true;
1012  return DD->tuneForGDB() && !includeMinimalInlineScopes() &&
1014  }
1015  llvm_unreachable("Unhandled DICompileUnit::DebugNameTableKind enum");
1016 }
1017 
1018 /// addGlobalName - Add a new global name to the compile unit.
1020  const DIScope *Context) {
1021  if (!hasDwarfPubSections())
1022  return;
1023  std::string FullName = getParentContextString(Context) + Name.str();
1024  GlobalNames[FullName] = &Die;
1025 }
1026 
1028  const DIScope *Context) {
1029  if (!hasDwarfPubSections())
1030  return;
1031  std::string FullName = getParentContextString(Context) + Name.str();
1032  // Insert, allowing the entry to remain as-is if it's already present
1033  // This way the CU-level type DIE is preferred over the "can't describe this
1034  // type as a unit offset because it's not really in the CU at all, it's only
1035  // in a type unit"
1036  GlobalNames.insert(std::make_pair(std::move(FullName), &getUnitDie()));
1037 }
1038 
1039 /// Add a new global type to the unit.
1040 void DwarfCompileUnit::addGlobalType(const DIType *Ty, const DIE &Die,
1041  const DIScope *Context) {
1042  if (!hasDwarfPubSections())
1043  return;
1044  std::string FullName = getParentContextString(Context) + Ty->getName().str();
1045  GlobalTypes[FullName] = &Die;
1046 }
1047 
1049  const DIScope *Context) {
1050  if (!hasDwarfPubSections())
1051  return;
1052  std::string FullName = getParentContextString(Context) + Ty->getName().str();
1053  // Insert, allowing the entry to remain as-is if it's already present
1054  // This way the CU-level type DIE is preferred over the "can't describe this
1055  // type as a unit offset because it's not really in the CU at all, it's only
1056  // in a type unit"
1057  GlobalTypes.insert(std::make_pair(std::move(FullName), &getUnitDie()));
1058 }
1059 
1060 /// addVariableAddress - Add DW_AT_location attribute for a
1061 /// DbgVariable based on provided MachineLocation.
1063  MachineLocation Location) {
1064  // addBlockByrefAddress is obsolete and will be removed soon.
1065  // The clang frontend always generates block byref variables with a
1066  // complex expression that encodes exactly what addBlockByrefAddress
1067  // would do.
1068  assert((!DV.isBlockByrefVariable() || DV.hasComplexAddress()) &&
1069  "block byref variable without a complex expression");
1070  if (DV.hasComplexAddress())
1071  addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
1072  else
1073  addAddress(Die, dwarf::DW_AT_location, Location);
1074 }
1075 
1076 /// Add an address attribute to a die based on the location provided.
1078  const MachineLocation &Location) {
1079  DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1080  DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
1081  if (Location.isIndirect())
1082  DwarfExpr.setMemoryLocationKind();
1083 
1084  DIExpressionCursor Cursor({});
1086  if (!DwarfExpr.addMachineRegExpression(TRI, Cursor, Location.getReg()))
1087  return;
1088  DwarfExpr.addExpression(std::move(Cursor));
1089 
1090  // Now attach the location information to the DIE.
1091  addBlock(Die, Attribute, DwarfExpr.finalize());
1092 }
1093 
1094 /// Start with the address based on the location provided, and generate the
1095 /// DWARF information necessary to find the actual variable given the extra
1096 /// address information encoded in the DbgVariable, starting from the starting
1097 /// location. Add the DWARF information to the die.
1100  const MachineLocation &Location) {
1101  DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1102  DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
1103  const DIExpression *DIExpr = DV.getSingleExpression();
1104  DwarfExpr.addFragmentOffset(DIExpr);
1105  if (Location.isIndirect())
1106  DwarfExpr.setMemoryLocationKind();
1107 
1108  DIExpressionCursor Cursor(DIExpr);
1110  if (!DwarfExpr.addMachineRegExpression(TRI, Cursor, Location.getReg()))
1111  return;
1112  DwarfExpr.addExpression(std::move(Cursor));
1113 
1114  // Now attach the location information to the DIE.
1115  addBlock(Die, Attribute, DwarfExpr.finalize());
1116 }
1117 
1118 /// Add a Dwarf loclistptr attribute data and value.
1120  unsigned Index) {
1121  dwarf::Form Form = DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
1122  : dwarf::DW_FORM_data4;
1123  Die.addValue(DIEValueAllocator, Attribute, Form, DIELocList(Index));
1124 }
1125 
1127  DIE &VariableDie) {
1128  StringRef Name = Var.getName();
1129  if (!Name.empty())
1130  addString(VariableDie, dwarf::DW_AT_name, Name);
1131  const auto *DIVar = Var.getVariable();
1132  if (DIVar)
1133  if (uint32_t AlignInBytes = DIVar->getAlignInBytes())
1134  addUInt(VariableDie, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
1135  AlignInBytes);
1136 
1137  addSourceLine(VariableDie, DIVar);
1138  addType(VariableDie, Var.getType());
1139  if (Var.isArtificial())
1140  addFlag(VariableDie, dwarf::DW_AT_artificial);
1141 }
1142 
1144  DIE &LabelDie) {
1145  StringRef Name = Label.getName();
1146  if (!Name.empty())
1147  addString(LabelDie, dwarf::DW_AT_name, Name);
1148  const auto *DILabel = Label.getLabel();
1149  addSourceLine(LabelDie, DILabel);
1150 }
1151 
1152 /// Add a Dwarf expression attribute data and value.
1154  const MCExpr *Expr) {
1155  Die.addValue(DIEValueAllocator, (dwarf::Attribute)0, Form, DIEExpr(Expr));
1156 }
1157 
1159  const MCExpr *Expr) {
1160  Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_addr,
1161  DIEExpr(Expr));
1162 }
1163 
1165  const DISubprogram *SP, DIE &SPDie) {
1166  auto *SPDecl = SP->getDeclaration();
1167  auto *Context = resolve(SPDecl ? SPDecl->getScope() : SP->getScope());
1169  addGlobalName(SP->getName(), SPDie, Context);
1170 }
1171 
1172 bool DwarfCompileUnit::isDwoUnit() const {
1173  return DD->useSplitDwarf() && Skeleton;
1174 }
1175 
1178  (DD->useSplitDwarf() && !Skeleton);
1179 }
1180 
1183  MCSymbol *Label = DD->getAddressPool().getLabel();
1185  getDwarfVersion() >= 5 ? dwarf::DW_AT_addr_base
1186  : dwarf::DW_AT_GNU_addr_base,
1187  Label, TLOF.getDwarfAddrSection()->getBeginSymbol());
1188 }
1189 
1191  Die.addValue(DIEValueAllocator, (dwarf::Attribute)0, dwarf::DW_FORM_udata,
1192  new (DIEValueAllocator) DIEBaseTypeRef(this, Idx));
1193 }
1194 
1196  // Insert the base_type DIEs directly after the CU so that their offsets will
1197  // fit in the fixed size ULEB128 used inside the location expressions.
1198  // Maintain order by iterating backwards and inserting to the front of CU
1199  // child list.
1200  for (auto &Btr : reverse(ExprRefedBaseTypes)) {
1201  DIE &Die = getUnitDie().addChildFront(
1202  DIE::get(DIEValueAllocator, dwarf::DW_TAG_base_type));
1203  SmallString<32> Str;
1204  addString(Die, dwarf::DW_AT_name,
1205  Twine(dwarf::AttributeEncodingString(Btr.Encoding) +
1206  "_" + Twine(Btr.BitSize)).toStringRef(Str));
1207  addUInt(Die, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Btr.Encoding);
1208  addUInt(Die, dwarf::DW_AT_byte_size, None, Btr.BitSize / 8);
1209 
1210  Btr.Die = &Die;
1211  }
1212 }
const DICompileUnit * getCUNode() const
Definition: DwarfUnit.h:89
const TargetLoweringObjectFile & getObjFileLowering() const
Return information about object file lowering.
Definition: AsmPrinter.cpp:206
DIE * getDIE() const
Definition: DwarfDebug.h:87
void emitInt64(uint64_t Value) const
Emit a long long directive and value.
DIE::value_iterator addSectionDelta(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Hi, const MCSymbol *Lo)
addSectionDelta - Add a label delta attribute data and value.
Definition: DwarfUnit.cpp:1624
const DILocalScope * getScopeNode() const
Definition: LexicalScopes.h:63
bool isConstant() const
Determine whether this represents a standalone constant value.
std::vector< BaseTypeRef > ExprRefedBaseTypes
void addFlag(DIE &Die, dwarf::Attribute Attribute)
Add a flag that is true to the DIE.
Definition: DwarfUnit.cpp:204
bool supportDebugThreadLocalLocation() const
Target supports TLS offset relocation in debug section?
LLVM_NODISCARD std::string str() const
str - Get the contents as an std::string.
Definition: StringRef.h:218
LLVMContext & Context
unsigned getDebugLocListIndex() const
Definition: DwarfDebug.h:172
void addLabelDelta(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Hi, const MCSymbol *Lo)
Add a label delta attribute data and value.
Definition: DwarfUnit.cpp:339
std::unique_ptr< MCStreamer > OutStreamer
This is the MCStreamer object for the file we are generating.
Definition: AsmPrinter.h:93
DIELoc - Represents an expression location.
Definition: DIE.h:891
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool isAbstractScope() const
Definition: LexicalScopes.h:64
MCSection * getDwarfLineSection() const
void addUnsignedConstant(uint64_t Value)
Emit an unsigned constant.
DIE * getOrCreateStaticMemberDIE(const DIDerivedType *DT)
Create new static data member DIE.
Definition: DwarfUnit.cpp:1523
void addOpAddress(DIELoc &Die, const MCSymbol *Sym)
Add a dwarf op address data and value using the form given and an op of either DW_FORM_addr or DW_FOR...
Definition: DwarfUnit.cpp:321
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:65
unsigned size() const
void setMemoryLocationKind()
Lock this down to become a memory location description.
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
virtual int getFrameIndexReference(const MachineFunction &MF, int FI, unsigned &FrameReg) const
getFrameIndexReference - This method should return the base register and offset used to reference a f...
virtual const TargetRegisterInfo * getRegisterInfo() const
getRegisterInfo - If register information is available, return it.
void addGlobalName(StringRef Name, const DIE &Die, const DIScope *Context) override
Add a new global name to the compile unit.
void applyLabelAttributes(const DbgLabel &Label, DIE &LabelDie)
const DIType * getType() const
Definition: DwarfDebug.cpp:198
Attribute
Attributes.
Definition: Dwarf.h:114
void insertDIE(const DINode *Desc, DIE *D)
Insert DIE into the map.
Definition: DwarfUnit.cpp:196
unsigned getReg() const
StringRef toStringRef(SmallVectorImpl< char > &Out) const
This returns the twine as a single StringRef if it can be represented as such.
Definition: Twine.h:455
Collects and handles dwarf debug information.
Definition: DwarfDebug.h:280
bool useGNUTLSOpcode() const
Returns whether to use DW_OP_GNU_push_tls_address, instead of the standard DW_OP_form_tls_address opc...
Definition: DwarfDebug.h:624
MD5::MD5Result * getMD5AsBytes(const DIFile *File) const
If the File has an MD5 checksum, return it as an MD5Result allocated in the MCContext.
Definition: DwarfUnit.cpp:292
SmallVectorImpl< InsnRange > & getRanges()
Definition: LexicalScopes.h:66
This class is defined as the common parent of DbgVariable and DbgLabel such that it could levarage po...
Definition: DwarfDebug.h:67
void addRange(RangeSpan Range)
addRange - Add an address range to the list of ranges for this unit.
bool hasDLLImportStorageClass() const
Definition: GlobalValue.h:261
void attachLowHighPC(DIE &D, const MCSymbol *Begin, const MCSymbol *End)
unsigned const TargetRegisterInfo * TRI
MachineFunction * MF
The current machine function.
Definition: AsmPrinter.h:96
void reserve(size_type N)
Definition: SmallVector.h:369
Represents a pointer to a location list in the debug_loc section.
Definition: DIE.h:331
LexicalScope - This class is used to track scope information.
Definition: LexicalScopes.h:44
void addType(DIE &Entity, const DIType *Ty, dwarf::Attribute Attribute=dwarf::DW_AT_type)
Add a new type attribute to the specified entity.
Definition: DwarfUnit.cpp:697
DIE::value_iterator addSectionLabel(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Label, const MCSymbol *Sec)
Add a Dwarf section label attribute data and value.
Definition: DwarfUnit.cpp:1633
const MachineFunction * getCurrentFunction() const
Definition: DwarfDebug.h:712
StringRef getName() const
AsmPrinter * Asm
Target of Dwarf emission.
Definition: DwarfUnit.h:49
Tuple of metadata.
Definition: Metadata.h:1105
Tagged DWARF-like metadata node.
bool useSplitDwarf() const
Returns whether or not to change the current debug info for the split dwarf proposal support...
Definition: DwarfDebug.h:658
const MCSymbol * getSymbol() const
Definition: DwarfDebug.h:243
DIE * getDIE(const DINode *D) const
Returns the DIE map slot for the specified debug variable.
Definition: DwarfUnit.cpp:190
DbgEntity * getExistingAbstractEntity(const DINode *Node)
MCSection * getDwarfRnglistsSection() const
T * resolve(TypedDINodeRef< T > Ref) const
Look in the DwarfDebug map for the MDNode that corresponds to the reference.
Definition: DwarfUnit.h:313
void attachRangesOrLowHighPC(DIE &D, SmallVector< RangeSpan, 2 > Ranges)
StringRef getName() const
void addArangeLabel(SymbolCU SCU)
Add a label so that arange data can be generated for it.
Definition: DwarfDebug.h:610
StringRef getName() const
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
bool isDebugDirectivesOnly() const
SmallVectorImpl< LexicalScope * > & getChildren()
Definition: LexicalScopes.h:65
unsigned getTag() const
void addComplexAddress(const DbgVariable &DV, DIE &Die, dwarf::Attribute Attribute, const MachineLocation &Location)
Start with the address based on the location provided, and generate the DWARF information necessary t...
LexicalScope * getParent() const
Definition: LexicalScopes.h:60
DIE & addChildFront(DIE *Child)
Definition: DIE.h:814
bool isObjectPointer() const
Definition: DwarfDebug.h:198
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: APFloat.h:41
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
void addSubprogramNames(const DICompileUnit &CU, const DISubprogram *SP, DIE &Die)
Definition: DwarfDebug.cpp:426
void addConstantFPValue(DIE &Die, const MachineOperand &MO)
Add constant value entry in variable DIE.
Definition: DwarfUnit.cpp:491
void emitHeader(bool UseOffsets) override
Emit the header for this unit, not including the initial length field.
void addGlobalTypeUnitType(const DIType *Ty, const DIScope *Context)
Add a new global type present in a type unit to this compile unit.
bool isLexicalScopeDIENull(LexicalScope *Scope)
A helper function to check whether the DIE for a given Scope is going to be null. ...
Definition: DwarfDebug.cpp:460
void addAccelName(const DICompileUnit &CU, StringRef Name, const DIE &Die)
DenseMap< LexicalScope *, ScopeVars > & getScopeVariables()
Definition: DwarfFile.h:179
virtual unsigned getFrameRegister(const MachineFunction &MF) const =0
Debug information queries.
Holds a DIExpression and keeps track of how many operands have been consumed so far.
DISubprogram * getDISubprogram(const MDNode *Scope)
Find subprogram that is enclosing this scope.
Definition: DebugInfo.cpp:43
static const uint16_t * lookup(unsigned opcode, unsigned domain, ArrayRef< uint16_t[3]> Table)
LLVM_NODISCARD bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:126
StringRef getFilename() const
DIE * getOrCreateTypeDIE(const MDNode *TyNode)
Find existing DIE or create new DIE for the given type.
Definition: DwarfUnit.cpp:652
void addBlock(DIE &Die, dwarf::Attribute Attribute, DIELoc *Loc)
Add block data.
Definition: DwarfUnit.cpp:381
void createAbstractEntity(const DINode *Node, LexicalScope *Scope)
static Optional< DebugNameTableKind > getNameTableKind(StringRef Str)
void addString(DIE &Die, dwarf::Attribute Attribute, StringRef Str)
Add a string attribute data and value.
Definition: DwarfUnit.cpp:239
DIE * constructInlinedScopeDIE(LexicalScope *Scope)
This scope represents inlined body of a function.
auto reverse(ContainerTy &&C, typename std::enable_if< has_rbegin< ContainerTy >::value >::type *=nullptr) -> decltype(make_range(C.rbegin(), C.rend()))
Definition: STLExtras.h:266
AddressPool & getAddressPool()
Definition: DwarfDebug.h:700
Subprogram description.
unsigned getUniqueID() const
const DIExpression * getSingleExpression() const
Definition: DwarfDebug.h:166
MCSymbol * getFunctionBegin() const
Definition: AsmPrinter.h:208
uint64_t getDWOId() const
This class is used to track local variable information.
Definition: DwarfDebug.h:116
bool DisableFramePointerElim(const MachineFunction &MF) const
DisableFramePointerElim - This returns true if frame pointer elimination optimization should be disab...
void addAddrTableBase()
Add the DW_AT_addr_base attribute to the unit DIE.
const DILocalVariable * getVariable() const
Definition: DwarfDebug.h:162
A list of DIE values.
Definition: DIE.h:627
DIE * constructVariableDIE(DbgVariable &DV, bool Abstract=false)
constructVariableDIE - Construct a DIE for the given DbgVariable.
void addAddressExpr(DIE &Die, dwarf::Attribute Attribute, const MCExpr *Expr)
Add an attribute containing an address expression to Die.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
void addGlobalNameForTypeUnit(StringRef Name, const DIScope *Context)
Add a new global name present in a type unit to this compile unit.
const MachineInstr * getMInsn() const
Definition: DwarfDebug.h:174
DIE * getOrCreateNameSpace(const DINamespace *NS)
Definition: DwarfUnit.cpp:1048
Debug location.
DIE & addChild(DIE *Child)
Add a child to the DIE.
Definition: DIE.h:807
DIScope * getScope() const
void addExpr(DIELoc &Die, dwarf::Form Form, const MCExpr *Expr)
Add a Dwarf expression attribute data and value.
const DwarfCompileUnit * getPrevCU() const
Returns the previous CU that was being updated.
Definition: DwarfDebug.h:676
bool hasComplexAddress() const
Definition: DwarfDebug.h:206
This class is used to track label information.
Definition: DwarfDebug.h:232
void addConstantValue(DIE &Die, const MachineOperand &MO, const DIType *Ty)
Add constant value entry in variable DIE.
Definition: DwarfUnit.cpp:523
bool useEmulatedTLS() const
Returns true if this target uses emulated TLS.
static DIE * get(BumpPtrAllocator &Alloc, dwarf::Tag Tag)
Definition: DIE.h:730
void applySubprogramAttributes(const DISubprogram *SP, DIE &SPDie, bool SkipSPAttributes=false)
Definition: DwarfUnit.cpp:1168
void addSourceLine(DIE &Die, unsigned Line, const DIFile *File)
Add location information to specified debug information entry.
Definition: DwarfUnit.cpp:395
This dwarf writer support class manages information associated with a source file.
Definition: DwarfUnit.h:40
void addLocationList(DIE &Die, dwarf::Attribute Attribute, unsigned Index)
Add a Dwarf loclistptr attribute data and value.
StringRef AttributeEncodingString(unsigned Encoding)
Definition: Dwarf.cpp:185
MCSection * getDwarfAddrSection() const
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
const DILocation * getInlinedAt() const
Definition: LexicalScopes.h:62
Instrumentation for Order File
unsigned getPointerSize(unsigned AS=0) const
Layout pointer size FIXME: The defaults need to be removed once all of the backends/clients are updat...
Definition: DataLayout.cpp:648
A structured debug information entry.
Definition: DIE.h:700
DIE & getUnitDie()
Definition: DIE.h:879
TargetMachine & TM
Target machine description.
Definition: AsmPrinter.h:81
This class is intended to be used as a driving class for all asm writers.
Definition: AsmPrinter.h:78
An expression DIE.
Definition: DIE.h:201
unsigned getOrCreateSourceID(const DIFile *File) override
Look up the source ID for the given file.
DIE * createScopeChildrenDIE(LexicalScope *Scope, SmallVectorImpl< DIE *> &Children, bool *HasNonScopeChildren=nullptr)
A helper function to create children of a Scope DIE.
void finishEntityDefinition(const DbgEntity *Entity)
void setDIE(DIE &D)
Definition: DwarfDebug.h:91
MDTuple * getTemplateParams() const
DwarfCompileUnit(unsigned UID, const DICompileUnit *Node, AsmPrinter *A, DwarfDebug *DW, DwarfFile *DWU)
DIDerivedType * getStaticDataMemberDeclaration() const
void emitCommonHeader(bool UseOffsets, dwarf::UnitType UT)
Emit the common part of the header for this unit.
Definition: DwarfUnit.cpp:1570
void addAddress(DIE &Die, dwarf::Attribute Attribute, const MachineLocation &Location)
Add an address attribute to a die based on the location provided.
A BaseTypeRef DIE.
Definition: DIE.h:235
A label DIE.
Definition: DIE.h:218
DIE * getOrCreateSubprogramDIE(const DISubprogram *SP, bool Minimal=false)
Definition: DwarfUnit.cpp:1093
const Triple & getTargetTriple() const
bool hasFrameIndexExprs() const
Definition: DwarfDebug.h:177
Base class for variables.
DIE * createAndAddScopeChildren(LexicalScope *Scope, DIE &ScopeDIE)
const DILabel * getLabel() const
Accessors.
Definition: DwarfDebug.h:242
bool addScopeVariable(LexicalScope *LS, DbgVariable *Var)
Definition: DwarfFile.cpp:104
void addLabelAddress(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Label)
addLabelAddress - Add a dwarf label attribute data and value using either DW_FORM_addr or DW_FORM_GNU...
dwarf::Tag getTag() const
Definition: DwarfDebug.h:181
T * resolve(TypedDINodeRef< T > Ref) const
Find the MDNode for the given reference.
Definition: DwarfDebug.h:693
Helper used to pair up a symbol and its DWARF compile unit.
Definition: DwarfDebug.h:264
StringRef getDirectory() const
bool useAllLinkageNames() const
Returns whether we should emit all DW_AT_[MIPS_]linkage_name.
Definition: DwarfDebug.h:620
MCSymbol * getLabelAfterInsn(const MachineInstr *MI)
Return Label immediately following the instruction.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
element_iterator elements_end() const
size_t size() const
Definition: SmallVector.h:52
void addScopeRangeList(DIE &ScopeDIE, SmallVector< RangeSpan, 2 > Range)
A helper function to construct a RangeSpanList for a given lexical scope.
uint64_t getElement(unsigned I) const
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
const MCSymbol * getStart() const
Definition: DwarfFile.h:38
ArrayRef< FrameIndexExpr > getFrameIndexExprs() const
Get the FI entries, sorted by fragment offset.
Definition: DwarfDebug.cpp:243
An imported module (C++ using directive or similar).
Base class for scope-like contexts.
DIE * constructImportedEntityDIE(const DIImportedEntity *Module)
Construct import_module DIE.
std::string getParentContextString(const DIScope *Context) const
Get string containing language specific context for a global name.
Definition: DwarfUnit.cpp:703
UnitType
Constants for unit types in DWARF v5.
Definition: Dwarf.h:330
void addSectionLabel(const MCSymbol *Sym)
void addExpression(DIExpressionCursor &&Expr, unsigned FragmentOffsetInBits=0)
Emit all remaining operations in the DIExpressionCursor.
DIE * constructLabelDIE(DbgLabel &DL, const LexicalScope &Scope)
Construct a DIE for the given DbgLabel.
bool tuneForGDB() const
Definition: DwarfDebug.h:728
void constructAbstractSubprogramScopeDIE(LexicalScope *Scope)
void addScopeLabel(LexicalScope *LS, DbgLabel *Label)
Definition: DwarfFile.cpp:121
bool useSectionsAsReferences() const
Returns whether to use sections as labels rather than temp symbols.
Definition: DwarfDebug.h:637
DenseMap< LexicalScope *, LabelList > & getScopeLabels()
Definition: DwarfFile.h:183
StringRef getName() const
Definition: DwarfDebug.h:245
void setPrevCU(const DwarfCompileUnit *PrevCU)
Definition: DwarfDebug.h:677
Base class for types.
static Optional< DebugEmissionKind > getEmissionKind(StringRef Str)
StringRef getName() const
MCSymbol * getSymbol(const GlobalValue *GV) const
Definition: AsmPrinter.cpp:430
DwarfCompileUnit * lookupCU(const DIE *Die)
Find the matching DwarfCompileUnit for the given CU DIE.
Definition: DwarfDebug.h:719
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:841
Information about stack frame layout on the target.
void addLinkageName(DIE &Die, StringRef LinkageName)
Add a linkage name, if it isn&#39;t empty.
Definition: DwarfUnit.cpp:570
void applySubprogramAttributesToDefinition(const DISubprogram *SP, DIE &SPDie)
MCSymbol * getBeginSymbol()
Definition: MCSection.h:109
void finishSubprogramDefinition(const DISubprogram *SP)
static GCRegistry::Add< StatepointGC > D("statepoint-example", "an example strategy for statepoint")
bool useAppleExtensionAttributes() const
Definition: DwarfDebug.h:652
MCSymbol * getFunctionEnd() const
Definition: AsmPrinter.h:209
static SmallVector< const DIVariable *, 2 > dependencies(DbgVariable *Var)
Return all DIVariables that appear in count: expressions.
StringRef getDisplayName() const
DWARF expression.
void addTemplateParams(DIE &Buffer, DINodeArray TParams)
Add template parameters in buffer.
Definition: DwarfUnit.cpp:578
Implements a dense probed hash-table based set with some number of buckets stored inline...
Definition: DenseSet.h:267
StringRef getLinkageName() const
DIE & constructSubprogramScopeDIE(const DISubprogram *Sub, LexicalScope *Scope)
Construct a DIE for this subprogram scope.
This file contains constants used for implementing Dwarf debug support.
bool isDefined() const
isDefined - Check if this symbol is defined (i.e., it has an address).
Definition: MCSymbol.h:247
DwarfDebug * DD
Definition: DwarfUnit.h:55
MCSymbol * getLabel()
Definition: AddressPool.h:53
StringRef getName() const
Definition: DwarfDebug.h:173
MCSection & getSection() const
Get the section associated with a defined, non-absolute symbol.
Definition: MCSymbol.h:266
virtual const MCSymbol * getFunctionFrameSymbol() const
Return symbol for the function pseudo stack if the stack frame is not a register based.
Definition: AsmPrinter.h:206
void addDIEEntry(DIE &Die, dwarf::Attribute Attribute, DIE &Entry)
Add a DIE attribute data and value.
Definition: DwarfUnit.cpp:345
iterator insert(iterator I, T &&Elt)
Definition: SmallVector.h:471
void append(in_iter in_start, in_iter in_end)
Add the specified range to the end of the SmallVector.
Definition: SmallVector.h:387
DIE * getOrCreateContextDIE(const DIScope *Context)
Get context owner&#39;s DIE.
Definition: DwarfUnit.cpp:596
dwarf::Tag getTag() const
Translate tag to proper Dwarf tag.
Definition: DwarfDebug.h:249
Representation of each machine instruction.
Definition: MachineInstr.h:63
An integer value DIE.
Definition: DIE.h:163
static bool isPhysicalRegister(unsigned Reg)
Return true if the specified register number is in the physical register namespace.
DIE * getOrCreateGlobalVariableDIE(const DIGlobalVariable *GV, ArrayRef< GlobalExpr > GlobalExprs)
Get or create global variable DIE.
DIE & createAndAddDIE(unsigned Tag, DIE &Parent, const DINode *N=nullptr)
Create a DIE with the given Tag, add the DIE to its parent, and call insertDIE if MD is not null...
Definition: DwarfUnit.cpp:374
LLVM_NODISCARD bool empty() const
Definition: SmallVector.h:55
bool useRangesSection() const
Returns whether ranges section should be emitted.
Definition: DwarfDebug.h:634
bool isBlockByrefVariable() const
Definition: DwarfDebug.cpp:193
void addVariableAddress(const DbgVariable &DV, DIE &Die, MachineLocation Location)
Add DW_AT_location attribute for a DbgVariable based on provided MachineLocation. ...
TargetOptions Options
const NodeList & List
Definition: RDFGraph.cpp:201
#define I(x, y, z)
Definition: MD5.cpp:58
void addGlobalType(const DIType *Ty, const DIE &Die, const DIScope *Context) override
Add a new global type to the compile unit.
virtual const TargetFrameLowering * getFrameLowering() const
void applyVariableAttributes(const DbgVariable &Var, DIE &VariableDie)
Optional< StringRef > getSource() const
element_iterator elements_begin() const
DIE * getOrCreateModule(const DIModule *M)
Definition: DwarfUnit.cpp:1069
static SmallVector< DbgVariable *, 8 > sortLocalVars(SmallVectorImpl< DbgVariable *> &Input)
Sort local variables so that variables appearing inside of helper expressions come first...
LLVM_NODISCARD std::enable_if<!is_simple_type< Y >::value, typename cast_retty< X, const Y >::ret_type >::type dyn_cast(const Y &Val)
Definition: Casting.h:322
void addBaseTypeRef(DIEValueList &Die, int64_t Idx)
DIE & constructCallSiteEntryDIE(DIE &ScopeDIE, const DISubprogram &CalleeSP, bool IsTail, const MCExpr *PCOffset)
Construct a call site entry DIE describing a call within Scope to a callee described by CalleeSP...
bool includeMinimalInlineScopes() const
size_type count(const_arg_type_t< ValueT > V) const
Return 1 if the specified key is in the set, 0 otherwise.
Definition: DenseSet.h:91
const DICompileUnit * CUNode
MDNode for the compile unit.
Definition: DwarfUnit.h:43
const LLVMTargetMachine & getTarget() const
getTarget - Return the target machine this machine code is compiled with
DwarfExpression implementation for singular DW_AT_location.
uint16_t getDwarfVersion() const
Definition: DwarfUnit.h:91
void addFragmentOffset(const DIExpression *Expr)
If applicable, emit an empty DW_OP_piece / DW_OP_bit_piece to advance to the fragment described by Ex...
DITypeRef getType() const
MCSymbol * getLabelBeforeInsn(const MachineInstr *MI)
Return Label preceding the instruction.
BumpPtrAllocator DIEValueAllocator
Definition: DwarfUnit.h:46
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
const MCSymbol * getEnd() const
Definition: DwarfFile.h:39
uint32_t getAlignInBytes() const
DINodeRef getEntity() const
void addLocalLabelAddress(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Label)
addLocalLabelAddress - Add a dwarf label attribute data and value using DW_FORM_addr only...
uint16_t getDwarfVersion() const
Returns the Dwarf Version.
DIE & updateSubprogramScopeDIE(const DISubprogram *SP)
Find DIE for the given subprogram and attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes...
void constructScopeDIE(LexicalScope *Scope, SmallVectorImpl< DIE *> &FinalChildren)
void addUInt(DIEValueList &Die, dwarf::Attribute Attribute, Optional< dwarf::Form > Form, uint64_t Integer)
Add an unsigned integer attribute data and value.
Definition: DwarfUnit.cpp:213
const DataLayout & getDataLayout() const
Return information about data layout.
Definition: AsmPrinter.cpp:210
bool isThreadLocal() const
If the value is "Thread Local", its value isn&#39;t shared by the threads.
Definition: GlobalValue.h:246
const DINode * getEntity() const
Accessors.
Definition: DwarfDebug.h:85
bool isNVPTX() const
Tests whether the target is NVPTX (32- or 64-bit).
Definition: Triple.h:669
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
MCSection * getDwarfRangesSection() const
DwarfFile * DU
Definition: DwarfUnit.h:56
virtual const MCExpr * getDebugThreadLocalSymbol(const MCSymbol *Sym) const
Create a symbol reference to describe the given TLS variable when emitting the address in debug info...
void applyStmtList(DIE &D)
Apply the DW_AT_stmt_list from this compile unit to the specified DIE.
MCSymbol * createTempSymbol(const Twine &Name) const
bool addMachineRegExpression(const TargetRegisterInfo &TRI, DIExpressionCursor &Expr, unsigned MachineReg, unsigned FragmentOffsetInBits=0)
Emit a machine register location.
bool isArtificial() const
Return true if DbgVariable is artificial.
Definition: DwarfDebug.h:190
value_iterator addValue(BumpPtrAllocator &Alloc, const DIEValue &V)
Definition: DIE.h:678
std::pair< const MachineInstr *, const MachineInstr * > InsnRange
InsnRange - This is used to track range of instructions with identical lexical scope.
Definition: LexicalScopes.h:39
static const DIExpression * extractAddressClass(const DIExpression *Expr, unsigned &AddrClass)
Checks if the last 4 elements of the expression are DW_OP_constu <DWARF address="" space>=""> DW_OP_s...
DIE * constructLexicalScopeDIE(LexicalScope *Scope)
Construct new DW_TAG_lexical_block for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels...
DIScopeRef getScope() const
unsigned getIndex(const MCSymbol *Sym, bool TLS=false)
Returns the index into the address pool with the given label/symbol.
Definition: AddressPool.cpp:19