1 //===--- DIBuilder.cpp - Debug Information Builder ------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the DIBuilder.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/IR/DIBuilder.h"
15 #include "llvm/IR/IRBuilder.h"
16 #include "LLVMContextImpl.h"
17 #include "llvm/ADT/Optional.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/BinaryFormat/Dwarf.h"
20 #include "llvm/IR/Constants.h"
21 #include "llvm/IR/DebugInfo.h"
22 #include "llvm/IR/IntrinsicInst.h"
23 #include "llvm/IR/Module.h"
24 #include "llvm/Support/Debug.h"
25
26 using namespace llvm;
27 using namespace llvm::dwarf;
28
29 cl::opt<bool>
30 UseDbgAddr("use-dbg-addr",
31 llvm::cl::desc("Use llvm.dbg.addr for all local variables"),
32 cl::init(false), cl::Hidden);
33
DIBuilder(Module & m,bool AllowUnresolvedNodes,DICompileUnit * CU)34 DIBuilder::DIBuilder(Module &m, bool AllowUnresolvedNodes, DICompileUnit *CU)
35 : M(m), VMContext(M.getContext()), CUNode(CU),
36 DeclareFn(nullptr), ValueFn(nullptr), LabelFn(nullptr),
37 AllowUnresolvedNodes(AllowUnresolvedNodes) {}
38
trackIfUnresolved(MDNode * N)39 void DIBuilder::trackIfUnresolved(MDNode *N) {
40 if (!N)
41 return;
42 if (N->isResolved())
43 return;
44
45 assert(AllowUnresolvedNodes && "Cannot handle unresolved nodes");
46 UnresolvedNodes.emplace_back(N);
47 }
48
finalizeSubprogram(DISubprogram * SP)49 void DIBuilder::finalizeSubprogram(DISubprogram *SP) {
50 MDTuple *Temp = SP->getRetainedNodes().get();
51 if (!Temp || !Temp->isTemporary())
52 return;
53
54 SmallVector<Metadata *, 16> RetainedNodes;
55
56 auto PV = PreservedVariables.find(SP);
57 if (PV != PreservedVariables.end())
58 RetainedNodes.append(PV->second.begin(), PV->second.end());
59
60 auto PL = PreservedLabels.find(SP);
61 if (PL != PreservedLabels.end())
62 RetainedNodes.append(PL->second.begin(), PL->second.end());
63
64 DINodeArray Node = getOrCreateArray(RetainedNodes);
65
66 TempMDTuple(Temp)->replaceAllUsesWith(Node.get());
67 }
68
finalize()69 void DIBuilder::finalize() {
70 if (!CUNode) {
71 assert(!AllowUnresolvedNodes &&
72 "creating type nodes without a CU is not supported");
73 return;
74 }
75
76 CUNode->replaceEnumTypes(MDTuple::get(VMContext, AllEnumTypes));
77
78 SmallVector<Metadata *, 16> RetainValues;
79 // Declarations and definitions of the same type may be retained. Some
80 // clients RAUW these pairs, leaving duplicates in the retained types
81 // list. Use a set to remove the duplicates while we transform the
82 // TrackingVHs back into Values.
83 SmallPtrSet<Metadata *, 16> RetainSet;
84 for (unsigned I = 0, E = AllRetainTypes.size(); I < E; I++)
85 if (RetainSet.insert(AllRetainTypes[I]).second)
86 RetainValues.push_back(AllRetainTypes[I]);
87
88 if (!RetainValues.empty())
89 CUNode->replaceRetainedTypes(MDTuple::get(VMContext, RetainValues));
90
91 DISubprogramArray SPs = MDTuple::get(VMContext, AllSubprograms);
92 for (auto *SP : SPs)
93 finalizeSubprogram(SP);
94 for (auto *N : RetainValues)
95 if (auto *SP = dyn_cast<DISubprogram>(N))
96 finalizeSubprogram(SP);
97
98 if (!AllGVs.empty())
99 CUNode->replaceGlobalVariables(MDTuple::get(VMContext, AllGVs));
100
101 if (!AllImportedModules.empty())
102 CUNode->replaceImportedEntities(MDTuple::get(
103 VMContext, SmallVector<Metadata *, 16>(AllImportedModules.begin(),
104 AllImportedModules.end())));
105
106 for (const auto &I : AllMacrosPerParent) {
107 // DIMacroNode's with nullptr parent are DICompileUnit direct children.
108 if (!I.first) {
109 CUNode->replaceMacros(MDTuple::get(VMContext, I.second.getArrayRef()));
110 continue;
111 }
112 // Otherwise, it must be a temporary DIMacroFile that need to be resolved.
113 auto *TMF = cast<DIMacroFile>(I.first);
114 auto *MF = DIMacroFile::get(VMContext, dwarf::DW_MACINFO_start_file,
115 TMF->getLine(), TMF->getFile(),
116 getOrCreateMacroArray(I.second.getArrayRef()));
117 replaceTemporary(llvm::TempDIMacroNode(TMF), MF);
118 }
119
120 // Now that all temp nodes have been replaced or deleted, resolve remaining
121 // cycles.
122 for (const auto &N : UnresolvedNodes)
123 if (N && !N->isResolved())
124 N->resolveCycles();
125 UnresolvedNodes.clear();
126
127 // Can't handle unresolved nodes anymore.
128 AllowUnresolvedNodes = false;
129 }
130
131 /// If N is compile unit return NULL otherwise return N.
getNonCompileUnitScope(DIScope * N)132 static DIScope *getNonCompileUnitScope(DIScope *N) {
133 if (!N || isa<DICompileUnit>(N))
134 return nullptr;
135 return cast<DIScope>(N);
136 }
137
createCompileUnit(unsigned Lang,DIFile * File,StringRef Producer,bool isOptimized,StringRef Flags,unsigned RunTimeVer,StringRef SplitName,DICompileUnit::DebugEmissionKind Kind,uint64_t DWOId,bool SplitDebugInlining,bool DebugInfoForProfiling,bool GnuPubnames)138 DICompileUnit *DIBuilder::createCompileUnit(
139 unsigned Lang, DIFile *File, StringRef Producer, bool isOptimized,
140 StringRef Flags, unsigned RunTimeVer, StringRef SplitName,
141 DICompileUnit::DebugEmissionKind Kind, uint64_t DWOId,
142 bool SplitDebugInlining, bool DebugInfoForProfiling, bool GnuPubnames) {
143
144 assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) ||
145 (Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
146 "Invalid Language tag");
147
148 assert(!CUNode && "Can only make one compile unit per DIBuilder instance");
149 CUNode = DICompileUnit::getDistinct(
150 VMContext, Lang, File, Producer, isOptimized, Flags, RunTimeVer,
151 SplitName, Kind, nullptr, nullptr, nullptr, nullptr, nullptr, DWOId,
152 SplitDebugInlining, DebugInfoForProfiling, GnuPubnames);
153
154 // Create a named metadata so that it is easier to find cu in a module.
155 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
156 NMD->addOperand(CUNode);
157 trackIfUnresolved(CUNode);
158 return CUNode;
159 }
160
161 static DIImportedEntity *
createImportedModule(LLVMContext & C,dwarf::Tag Tag,DIScope * Context,Metadata * NS,DIFile * File,unsigned Line,StringRef Name,SmallVectorImpl<TrackingMDNodeRef> & AllImportedModules)162 createImportedModule(LLVMContext &C, dwarf::Tag Tag, DIScope *Context,
163 Metadata *NS, DIFile *File, unsigned Line, StringRef Name,
164 SmallVectorImpl<TrackingMDNodeRef> &AllImportedModules) {
165 if (Line)
166 assert(File && "Source location has line number but no file");
167 unsigned EntitiesCount = C.pImpl->DIImportedEntitys.size();
168 auto *M =
169 DIImportedEntity::get(C, Tag, Context, DINodeRef(NS), File, Line, Name);
170 if (EntitiesCount < C.pImpl->DIImportedEntitys.size())
171 // A new Imported Entity was just added to the context.
172 // Add it to the Imported Modules list.
173 AllImportedModules.emplace_back(M);
174 return M;
175 }
176
createImportedModule(DIScope * Context,DINamespace * NS,DIFile * File,unsigned Line)177 DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context,
178 DINamespace *NS, DIFile *File,
179 unsigned Line) {
180 return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
181 Context, NS, File, Line, StringRef(),
182 AllImportedModules);
183 }
184
createImportedModule(DIScope * Context,DIImportedEntity * NS,DIFile * File,unsigned Line)185 DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context,
186 DIImportedEntity *NS,
187 DIFile *File, unsigned Line) {
188 return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
189 Context, NS, File, Line, StringRef(),
190 AllImportedModules);
191 }
192
createImportedModule(DIScope * Context,DIModule * M,DIFile * File,unsigned Line)193 DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DIModule *M,
194 DIFile *File, unsigned Line) {
195 return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module,
196 Context, M, File, Line, StringRef(),
197 AllImportedModules);
198 }
199
createImportedDeclaration(DIScope * Context,DINode * Decl,DIFile * File,unsigned Line,StringRef Name)200 DIImportedEntity *DIBuilder::createImportedDeclaration(DIScope *Context,
201 DINode *Decl,
202 DIFile *File,
203 unsigned Line,
204 StringRef Name) {
205 // Make sure to use the unique identifier based metadata reference for
206 // types that have one.
207 return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_declaration,
208 Context, Decl, File, Line, Name,
209 AllImportedModules);
210 }
211
createFile(StringRef Filename,StringRef Directory,Optional<DIFile::ChecksumInfo<StringRef>> CS,Optional<StringRef> Source)212 DIFile *DIBuilder::createFile(StringRef Filename, StringRef Directory,
213 Optional<DIFile::ChecksumInfo<StringRef>> CS,
214 Optional<StringRef> Source) {
215 return DIFile::get(VMContext, Filename, Directory, CS, Source);
216 }
217
createMacro(DIMacroFile * Parent,unsigned LineNumber,unsigned MacroType,StringRef Name,StringRef Value)218 DIMacro *DIBuilder::createMacro(DIMacroFile *Parent, unsigned LineNumber,
219 unsigned MacroType, StringRef Name,
220 StringRef Value) {
221 assert(!Name.empty() && "Unable to create macro without name");
222 assert((MacroType == dwarf::DW_MACINFO_undef ||
223 MacroType == dwarf::DW_MACINFO_define) &&
224 "Unexpected macro type");
225 auto *M = DIMacro::get(VMContext, MacroType, LineNumber, Name, Value);
226 AllMacrosPerParent[Parent].insert(M);
227 return M;
228 }
229
createTempMacroFile(DIMacroFile * Parent,unsigned LineNumber,DIFile * File)230 DIMacroFile *DIBuilder::createTempMacroFile(DIMacroFile *Parent,
231 unsigned LineNumber, DIFile *File) {
232 auto *MF = DIMacroFile::getTemporary(VMContext, dwarf::DW_MACINFO_start_file,
233 LineNumber, File, DIMacroNodeArray())
234 .release();
235 AllMacrosPerParent[Parent].insert(MF);
236 // Add the new temporary DIMacroFile to the macro per parent map as a parent.
237 // This is needed to assure DIMacroFile with no children to have an entry in
238 // the map. Otherwise, it will not be resolved in DIBuilder::finalize().
239 AllMacrosPerParent.insert({MF, {}});
240 return MF;
241 }
242
createEnumerator(StringRef Name,int64_t Val,bool IsUnsigned)243 DIEnumerator *DIBuilder::createEnumerator(StringRef Name, int64_t Val,
244 bool IsUnsigned) {
245 assert(!Name.empty() && "Unable to create enumerator without name");
246 return DIEnumerator::get(VMContext, Val, IsUnsigned, Name);
247 }
248
createUnspecifiedType(StringRef Name)249 DIBasicType *DIBuilder::createUnspecifiedType(StringRef Name) {
250 assert(!Name.empty() && "Unable to create type without name");
251 return DIBasicType::get(VMContext, dwarf::DW_TAG_unspecified_type, Name);
252 }
253
createNullPtrType()254 DIBasicType *DIBuilder::createNullPtrType() {
255 return createUnspecifiedType("decltype(nullptr)");
256 }
257
createBasicType(StringRef Name,uint64_t SizeInBits,unsigned Encoding)258 DIBasicType *DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits,
259 unsigned Encoding) {
260 assert(!Name.empty() && "Unable to create type without name");
261 return DIBasicType::get(VMContext, dwarf::DW_TAG_base_type, Name, SizeInBits,
262 0, Encoding);
263 }
264
createQualifiedType(unsigned Tag,DIType * FromTy)265 DIDerivedType *DIBuilder::createQualifiedType(unsigned Tag, DIType *FromTy) {
266 return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, FromTy, 0,
267 0, 0, None, DINode::FlagZero);
268 }
269
createPointerType(DIType * PointeeTy,uint64_t SizeInBits,uint32_t AlignInBits,Optional<unsigned> DWARFAddressSpace,StringRef Name)270 DIDerivedType *DIBuilder::createPointerType(
271 DIType *PointeeTy,
272 uint64_t SizeInBits,
273 uint32_t AlignInBits,
274 Optional<unsigned> DWARFAddressSpace,
275 StringRef Name) {
276 // FIXME: Why is there a name here?
277 return DIDerivedType::get(VMContext, dwarf::DW_TAG_pointer_type, Name,
278 nullptr, 0, nullptr, PointeeTy, SizeInBits,
279 AlignInBits, 0, DWARFAddressSpace,
280 DINode::FlagZero);
281 }
282
createMemberPointerType(DIType * PointeeTy,DIType * Base,uint64_t SizeInBits,uint32_t AlignInBits,DINode::DIFlags Flags)283 DIDerivedType *DIBuilder::createMemberPointerType(DIType *PointeeTy,
284 DIType *Base,
285 uint64_t SizeInBits,
286 uint32_t AlignInBits,
287 DINode::DIFlags Flags) {
288 return DIDerivedType::get(VMContext, dwarf::DW_TAG_ptr_to_member_type, "",
289 nullptr, 0, nullptr, PointeeTy, SizeInBits,
290 AlignInBits, 0, None, Flags, Base);
291 }
292
createReferenceType(unsigned Tag,DIType * RTy,uint64_t SizeInBits,uint32_t AlignInBits,Optional<unsigned> DWARFAddressSpace)293 DIDerivedType *DIBuilder::createReferenceType(
294 unsigned Tag, DIType *RTy,
295 uint64_t SizeInBits,
296 uint32_t AlignInBits,
297 Optional<unsigned> DWARFAddressSpace) {
298 assert(RTy && "Unable to create reference type");
299 return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, RTy,
300 SizeInBits, AlignInBits, 0, DWARFAddressSpace,
301 DINode::FlagZero);
302 }
303
createTypedef(DIType * Ty,StringRef Name,DIFile * File,unsigned LineNo,DIScope * Context)304 DIDerivedType *DIBuilder::createTypedef(DIType *Ty, StringRef Name,
305 DIFile *File, unsigned LineNo,
306 DIScope *Context) {
307 return DIDerivedType::get(VMContext, dwarf::DW_TAG_typedef, Name, File,
308 LineNo, getNonCompileUnitScope(Context), Ty, 0, 0,
309 0, None, DINode::FlagZero);
310 }
311
createFriend(DIType * Ty,DIType * FriendTy)312 DIDerivedType *DIBuilder::createFriend(DIType *Ty, DIType *FriendTy) {
313 assert(Ty && "Invalid type!");
314 assert(FriendTy && "Invalid friend type!");
315 return DIDerivedType::get(VMContext, dwarf::DW_TAG_friend, "", nullptr, 0, Ty,
316 FriendTy, 0, 0, 0, None, DINode::FlagZero);
317 }
318
createInheritance(DIType * Ty,DIType * BaseTy,uint64_t BaseOffset,uint32_t VBPtrOffset,DINode::DIFlags Flags)319 DIDerivedType *DIBuilder::createInheritance(DIType *Ty, DIType *BaseTy,
320 uint64_t BaseOffset,
321 uint32_t VBPtrOffset,
322 DINode::DIFlags Flags) {
323 assert(Ty && "Unable to create inheritance");
324 Metadata *ExtraData = ConstantAsMetadata::get(
325 ConstantInt::get(IntegerType::get(VMContext, 32), VBPtrOffset));
326 return DIDerivedType::get(VMContext, dwarf::DW_TAG_inheritance, "", nullptr,
327 0, Ty, BaseTy, 0, 0, BaseOffset, None,
328 Flags, ExtraData);
329 }
330
createMemberType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,uint64_t OffsetInBits,DINode::DIFlags Flags,DIType * Ty)331 DIDerivedType *DIBuilder::createMemberType(DIScope *Scope, StringRef Name,
332 DIFile *File, unsigned LineNumber,
333 uint64_t SizeInBits,
334 uint32_t AlignInBits,
335 uint64_t OffsetInBits,
336 DINode::DIFlags Flags, DIType *Ty) {
337 return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
338 LineNumber, getNonCompileUnitScope(Scope), Ty,
339 SizeInBits, AlignInBits, OffsetInBits, None, Flags);
340 }
341
getConstantOrNull(Constant * C)342 static ConstantAsMetadata *getConstantOrNull(Constant *C) {
343 if (C)
344 return ConstantAsMetadata::get(C);
345 return nullptr;
346 }
347
createVariantMemberType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,uint64_t OffsetInBits,Constant * Discriminant,DINode::DIFlags Flags,DIType * Ty)348 DIDerivedType *DIBuilder::createVariantMemberType(DIScope *Scope, StringRef Name,
349 DIFile *File, unsigned LineNumber,
350 uint64_t SizeInBits,
351 uint32_t AlignInBits,
352 uint64_t OffsetInBits,
353 Constant *Discriminant,
354 DINode::DIFlags Flags, DIType *Ty) {
355 return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
356 LineNumber, getNonCompileUnitScope(Scope), Ty,
357 SizeInBits, AlignInBits, OffsetInBits, None, Flags,
358 getConstantOrNull(Discriminant));
359 }
360
createBitFieldMemberType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint64_t OffsetInBits,uint64_t StorageOffsetInBits,DINode::DIFlags Flags,DIType * Ty)361 DIDerivedType *DIBuilder::createBitFieldMemberType(
362 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
363 uint64_t SizeInBits, uint64_t OffsetInBits, uint64_t StorageOffsetInBits,
364 DINode::DIFlags Flags, DIType *Ty) {
365 Flags |= DINode::FlagBitField;
366 return DIDerivedType::get(
367 VMContext, dwarf::DW_TAG_member, Name, File, LineNumber,
368 getNonCompileUnitScope(Scope), Ty, SizeInBits, /* AlignInBits */ 0,
369 OffsetInBits, None, Flags,
370 ConstantAsMetadata::get(ConstantInt::get(IntegerType::get(VMContext, 64),
371 StorageOffsetInBits)));
372 }
373
374 DIDerivedType *
createStaticMemberType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,DIType * Ty,DINode::DIFlags Flags,llvm::Constant * Val,uint32_t AlignInBits)375 DIBuilder::createStaticMemberType(DIScope *Scope, StringRef Name, DIFile *File,
376 unsigned LineNumber, DIType *Ty,
377 DINode::DIFlags Flags, llvm::Constant *Val,
378 uint32_t AlignInBits) {
379 Flags |= DINode::FlagStaticMember;
380 return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
381 LineNumber, getNonCompileUnitScope(Scope), Ty, 0,
382 AlignInBits, 0, None, Flags,
383 getConstantOrNull(Val));
384 }
385
386 DIDerivedType *
createObjCIVar(StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,uint64_t OffsetInBits,DINode::DIFlags Flags,DIType * Ty,MDNode * PropertyNode)387 DIBuilder::createObjCIVar(StringRef Name, DIFile *File, unsigned LineNumber,
388 uint64_t SizeInBits, uint32_t AlignInBits,
389 uint64_t OffsetInBits, DINode::DIFlags Flags,
390 DIType *Ty, MDNode *PropertyNode) {
391 return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File,
392 LineNumber, getNonCompileUnitScope(File), Ty,
393 SizeInBits, AlignInBits, OffsetInBits, None, Flags,
394 PropertyNode);
395 }
396
397 DIObjCProperty *
createObjCProperty(StringRef Name,DIFile * File,unsigned LineNumber,StringRef GetterName,StringRef SetterName,unsigned PropertyAttributes,DIType * Ty)398 DIBuilder::createObjCProperty(StringRef Name, DIFile *File, unsigned LineNumber,
399 StringRef GetterName, StringRef SetterName,
400 unsigned PropertyAttributes, DIType *Ty) {
401 return DIObjCProperty::get(VMContext, Name, File, LineNumber, GetterName,
402 SetterName, PropertyAttributes, Ty);
403 }
404
405 DITemplateTypeParameter *
createTemplateTypeParameter(DIScope * Context,StringRef Name,DIType * Ty)406 DIBuilder::createTemplateTypeParameter(DIScope *Context, StringRef Name,
407 DIType *Ty) {
408 assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit");
409 return DITemplateTypeParameter::get(VMContext, Name, Ty);
410 }
411
412 static DITemplateValueParameter *
createTemplateValueParameterHelper(LLVMContext & VMContext,unsigned Tag,DIScope * Context,StringRef Name,DIType * Ty,Metadata * MD)413 createTemplateValueParameterHelper(LLVMContext &VMContext, unsigned Tag,
414 DIScope *Context, StringRef Name, DIType *Ty,
415 Metadata *MD) {
416 assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit");
417 return DITemplateValueParameter::get(VMContext, Tag, Name, Ty, MD);
418 }
419
420 DITemplateValueParameter *
createTemplateValueParameter(DIScope * Context,StringRef Name,DIType * Ty,Constant * Val)421 DIBuilder::createTemplateValueParameter(DIScope *Context, StringRef Name,
422 DIType *Ty, Constant *Val) {
423 return createTemplateValueParameterHelper(
424 VMContext, dwarf::DW_TAG_template_value_parameter, Context, Name, Ty,
425 getConstantOrNull(Val));
426 }
427
428 DITemplateValueParameter *
createTemplateTemplateParameter(DIScope * Context,StringRef Name,DIType * Ty,StringRef Val)429 DIBuilder::createTemplateTemplateParameter(DIScope *Context, StringRef Name,
430 DIType *Ty, StringRef Val) {
431 return createTemplateValueParameterHelper(
432 VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty,
433 MDString::get(VMContext, Val));
434 }
435
436 DITemplateValueParameter *
createTemplateParameterPack(DIScope * Context,StringRef Name,DIType * Ty,DINodeArray Val)437 DIBuilder::createTemplateParameterPack(DIScope *Context, StringRef Name,
438 DIType *Ty, DINodeArray Val) {
439 return createTemplateValueParameterHelper(
440 VMContext, dwarf::DW_TAG_GNU_template_parameter_pack, Context, Name, Ty,
441 Val.get());
442 }
443
createClassType(DIScope * Context,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,uint64_t OffsetInBits,DINode::DIFlags Flags,DIType * DerivedFrom,DINodeArray Elements,DIType * VTableHolder,MDNode * TemplateParams,StringRef UniqueIdentifier)444 DICompositeType *DIBuilder::createClassType(
445 DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber,
446 uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits,
447 DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements,
448 DIType *VTableHolder, MDNode *TemplateParams, StringRef UniqueIdentifier) {
449 assert((!Context || isa<DIScope>(Context)) &&
450 "createClassType should be called with a valid Context");
451
452 auto *R = DICompositeType::get(
453 VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
454 getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits,
455 OffsetInBits, Flags, Elements, 0, VTableHolder,
456 cast_or_null<MDTuple>(TemplateParams), UniqueIdentifier);
457 trackIfUnresolved(R);
458 return R;
459 }
460
createStructType(DIScope * Context,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,DINode::DIFlags Flags,DIType * DerivedFrom,DINodeArray Elements,unsigned RunTimeLang,DIType * VTableHolder,StringRef UniqueIdentifier)461 DICompositeType *DIBuilder::createStructType(
462 DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber,
463 uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
464 DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang,
465 DIType *VTableHolder, StringRef UniqueIdentifier) {
466 auto *R = DICompositeType::get(
467 VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber,
468 getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, 0,
469 Flags, Elements, RunTimeLang, VTableHolder, nullptr, UniqueIdentifier);
470 trackIfUnresolved(R);
471 return R;
472 }
473
createUnionType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,DINode::DIFlags Flags,DINodeArray Elements,unsigned RunTimeLang,StringRef UniqueIdentifier)474 DICompositeType *DIBuilder::createUnionType(
475 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
476 uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
477 DINodeArray Elements, unsigned RunTimeLang, StringRef UniqueIdentifier) {
478 auto *R = DICompositeType::get(
479 VMContext, dwarf::DW_TAG_union_type, Name, File, LineNumber,
480 getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags,
481 Elements, RunTimeLang, nullptr, nullptr, UniqueIdentifier);
482 trackIfUnresolved(R);
483 return R;
484 }
485
createVariantPart(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,DINode::DIFlags Flags,DIDerivedType * Discriminator,DINodeArray Elements,StringRef UniqueIdentifier)486 DICompositeType *DIBuilder::createVariantPart(
487 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
488 uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
489 DIDerivedType *Discriminator, DINodeArray Elements, StringRef UniqueIdentifier) {
490 auto *R = DICompositeType::get(
491 VMContext, dwarf::DW_TAG_variant_part, Name, File, LineNumber,
492 getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags,
493 Elements, 0, nullptr, nullptr, UniqueIdentifier, Discriminator);
494 trackIfUnresolved(R);
495 return R;
496 }
497
createSubroutineType(DITypeRefArray ParameterTypes,DINode::DIFlags Flags,unsigned CC)498 DISubroutineType *DIBuilder::createSubroutineType(DITypeRefArray ParameterTypes,
499 DINode::DIFlags Flags,
500 unsigned CC) {
501 return DISubroutineType::get(VMContext, Flags, CC, ParameterTypes);
502 }
503
createEnumerationType(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNumber,uint64_t SizeInBits,uint32_t AlignInBits,DINodeArray Elements,DIType * UnderlyingType,StringRef UniqueIdentifier,bool IsFixed)504 DICompositeType *DIBuilder::createEnumerationType(
505 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
506 uint64_t SizeInBits, uint32_t AlignInBits, DINodeArray Elements,
507 DIType *UnderlyingType, StringRef UniqueIdentifier, bool IsFixed) {
508 auto *CTy = DICompositeType::get(
509 VMContext, dwarf::DW_TAG_enumeration_type, Name, File, LineNumber,
510 getNonCompileUnitScope(Scope), UnderlyingType, SizeInBits, AlignInBits, 0,
511 IsFixed ? DINode::FlagFixedEnum : DINode::FlagZero, Elements, 0, nullptr,
512 nullptr, UniqueIdentifier);
513 AllEnumTypes.push_back(CTy);
514 trackIfUnresolved(CTy);
515 return CTy;
516 }
517
createArrayType(uint64_t Size,uint32_t AlignInBits,DIType * Ty,DINodeArray Subscripts)518 DICompositeType *DIBuilder::createArrayType(uint64_t Size,
519 uint32_t AlignInBits, DIType *Ty,
520 DINodeArray Subscripts) {
521 auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "",
522 nullptr, 0, nullptr, Ty, Size, AlignInBits, 0,
523 DINode::FlagZero, Subscripts, 0, nullptr);
524 trackIfUnresolved(R);
525 return R;
526 }
527
createVectorType(uint64_t Size,uint32_t AlignInBits,DIType * Ty,DINodeArray Subscripts)528 DICompositeType *DIBuilder::createVectorType(uint64_t Size,
529 uint32_t AlignInBits, DIType *Ty,
530 DINodeArray Subscripts) {
531 auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "",
532 nullptr, 0, nullptr, Ty, Size, AlignInBits, 0,
533 DINode::FlagVector, Subscripts, 0, nullptr);
534 trackIfUnresolved(R);
535 return R;
536 }
537
createArtificialSubprogram(DISubprogram * SP)538 DISubprogram *DIBuilder::createArtificialSubprogram(DISubprogram *SP) {
539 auto NewSP = SP->cloneWithFlags(SP->getFlags() | DINode::FlagArtificial);
540 return MDNode::replaceWithDistinct(std::move(NewSP));
541 }
542
createTypeWithFlags(const DIType * Ty,DINode::DIFlags FlagsToSet)543 static DIType *createTypeWithFlags(const DIType *Ty,
544 DINode::DIFlags FlagsToSet) {
545 auto NewTy = Ty->cloneWithFlags(Ty->getFlags() | FlagsToSet);
546 return MDNode::replaceWithUniqued(std::move(NewTy));
547 }
548
createArtificialType(DIType * Ty)549 DIType *DIBuilder::createArtificialType(DIType *Ty) {
550 // FIXME: Restrict this to the nodes where it's valid.
551 if (Ty->isArtificial())
552 return Ty;
553 return createTypeWithFlags(Ty, DINode::FlagArtificial);
554 }
555
createObjectPointerType(DIType * Ty)556 DIType *DIBuilder::createObjectPointerType(DIType *Ty) {
557 // FIXME: Restrict this to the nodes where it's valid.
558 if (Ty->isObjectPointer())
559 return Ty;
560 DINode::DIFlags Flags = DINode::FlagObjectPointer | DINode::FlagArtificial;
561 return createTypeWithFlags(Ty, Flags);
562 }
563
retainType(DIScope * T)564 void DIBuilder::retainType(DIScope *T) {
565 assert(T && "Expected non-null type");
566 assert((isa<DIType>(T) || (isa<DISubprogram>(T) &&
567 cast<DISubprogram>(T)->isDefinition() == false)) &&
568 "Expected type or subprogram declaration");
569 AllRetainTypes.emplace_back(T);
570 }
571
createUnspecifiedParameter()572 DIBasicType *DIBuilder::createUnspecifiedParameter() { return nullptr; }
573
574 DICompositeType *
createForwardDecl(unsigned Tag,StringRef Name,DIScope * Scope,DIFile * F,unsigned Line,unsigned RuntimeLang,uint64_t SizeInBits,uint32_t AlignInBits,StringRef UniqueIdentifier)575 DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIScope *Scope,
576 DIFile *F, unsigned Line, unsigned RuntimeLang,
577 uint64_t SizeInBits, uint32_t AlignInBits,
578 StringRef UniqueIdentifier) {
579 // FIXME: Define in terms of createReplaceableForwardDecl() by calling
580 // replaceWithUniqued().
581 auto *RetTy = DICompositeType::get(
582 VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr,
583 SizeInBits, AlignInBits, 0, DINode::FlagFwdDecl, nullptr, RuntimeLang,
584 nullptr, nullptr, UniqueIdentifier);
585 trackIfUnresolved(RetTy);
586 return RetTy;
587 }
588
createReplaceableCompositeType(unsigned Tag,StringRef Name,DIScope * Scope,DIFile * F,unsigned Line,unsigned RuntimeLang,uint64_t SizeInBits,uint32_t AlignInBits,DINode::DIFlags Flags,StringRef UniqueIdentifier)589 DICompositeType *DIBuilder::createReplaceableCompositeType(
590 unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line,
591 unsigned RuntimeLang, uint64_t SizeInBits, uint32_t AlignInBits,
592 DINode::DIFlags Flags, StringRef UniqueIdentifier) {
593 auto *RetTy =
594 DICompositeType::getTemporary(
595 VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr,
596 SizeInBits, AlignInBits, 0, Flags, nullptr, RuntimeLang, nullptr,
597 nullptr, UniqueIdentifier)
598 .release();
599 trackIfUnresolved(RetTy);
600 return RetTy;
601 }
602
getOrCreateArray(ArrayRef<Metadata * > Elements)603 DINodeArray DIBuilder::getOrCreateArray(ArrayRef<Metadata *> Elements) {
604 return MDTuple::get(VMContext, Elements);
605 }
606
607 DIMacroNodeArray
getOrCreateMacroArray(ArrayRef<Metadata * > Elements)608 DIBuilder::getOrCreateMacroArray(ArrayRef<Metadata *> Elements) {
609 return MDTuple::get(VMContext, Elements);
610 }
611
getOrCreateTypeArray(ArrayRef<Metadata * > Elements)612 DITypeRefArray DIBuilder::getOrCreateTypeArray(ArrayRef<Metadata *> Elements) {
613 SmallVector<llvm::Metadata *, 16> Elts;
614 for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
615 if (Elements[i] && isa<MDNode>(Elements[i]))
616 Elts.push_back(cast<DIType>(Elements[i]));
617 else
618 Elts.push_back(Elements[i]);
619 }
620 return DITypeRefArray(MDNode::get(VMContext, Elts));
621 }
622
getOrCreateSubrange(int64_t Lo,int64_t Count)623 DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Count) {
624 return DISubrange::get(VMContext, Count, Lo);
625 }
626
getOrCreateSubrange(int64_t Lo,Metadata * CountNode)627 DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, Metadata *CountNode) {
628 return DISubrange::get(VMContext, CountNode, Lo);
629 }
630
checkGlobalVariableScope(DIScope * Context)631 static void checkGlobalVariableScope(DIScope *Context) {
632 #ifndef NDEBUG
633 if (auto *CT =
634 dyn_cast_or_null<DICompositeType>(getNonCompileUnitScope(Context)))
635 assert(CT->getIdentifier().empty() &&
636 "Context of a global variable should not be a type with identifier");
637 #endif
638 }
639
createGlobalVariableExpression(DIScope * Context,StringRef Name,StringRef LinkageName,DIFile * F,unsigned LineNumber,DIType * Ty,bool isLocalToUnit,DIExpression * Expr,MDNode * Decl,uint32_t AlignInBits)640 DIGlobalVariableExpression *DIBuilder::createGlobalVariableExpression(
641 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
642 unsigned LineNumber, DIType *Ty, bool isLocalToUnit, DIExpression *Expr,
643 MDNode *Decl, uint32_t AlignInBits) {
644 checkGlobalVariableScope(Context);
645
646 auto *GV = DIGlobalVariable::getDistinct(
647 VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F,
648 LineNumber, Ty, isLocalToUnit, true, cast_or_null<DIDerivedType>(Decl),
649 AlignInBits);
650 if (!Expr)
651 Expr = createExpression();
652 auto *N = DIGlobalVariableExpression::get(VMContext, GV, Expr);
653 AllGVs.push_back(N);
654 return N;
655 }
656
createTempGlobalVariableFwdDecl(DIScope * Context,StringRef Name,StringRef LinkageName,DIFile * F,unsigned LineNumber,DIType * Ty,bool isLocalToUnit,MDNode * Decl,uint32_t AlignInBits)657 DIGlobalVariable *DIBuilder::createTempGlobalVariableFwdDecl(
658 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
659 unsigned LineNumber, DIType *Ty, bool isLocalToUnit, MDNode *Decl,
660 uint32_t AlignInBits) {
661 checkGlobalVariableScope(Context);
662
663 return DIGlobalVariable::getTemporary(
664 VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F,
665 LineNumber, Ty, isLocalToUnit, false,
666 cast_or_null<DIDerivedType>(Decl), AlignInBits)
667 .release();
668 }
669
createLocalVariable(LLVMContext & VMContext,DenseMap<MDNode *,SmallVector<TrackingMDNodeRef,1>> & PreservedVariables,DIScope * Scope,StringRef Name,unsigned ArgNo,DIFile * File,unsigned LineNo,DIType * Ty,bool AlwaysPreserve,DINode::DIFlags Flags,uint32_t AlignInBits)670 static DILocalVariable *createLocalVariable(
671 LLVMContext &VMContext,
672 DenseMap<MDNode *, SmallVector<TrackingMDNodeRef, 1>> &PreservedVariables,
673 DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File,
674 unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags,
675 uint32_t AlignInBits) {
676 // FIXME: Why getNonCompileUnitScope()?
677 // FIXME: Why is "!Context" okay here?
678 // FIXME: Why doesn't this check for a subprogram or lexical block (AFAICT
679 // the only valid scopes)?
680 DIScope *Context = getNonCompileUnitScope(Scope);
681
682 auto *Node =
683 DILocalVariable::get(VMContext, cast_or_null<DILocalScope>(Context), Name,
684 File, LineNo, Ty, ArgNo, Flags, AlignInBits);
685 if (AlwaysPreserve) {
686 // The optimizer may remove local variables. If there is an interest
687 // to preserve variable info in such situation then stash it in a
688 // named mdnode.
689 DISubprogram *Fn = getDISubprogram(Scope);
690 assert(Fn && "Missing subprogram for local variable");
691 PreservedVariables[Fn].emplace_back(Node);
692 }
693 return Node;
694 }
695
createAutoVariable(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNo,DIType * Ty,bool AlwaysPreserve,DINode::DIFlags Flags,uint32_t AlignInBits)696 DILocalVariable *DIBuilder::createAutoVariable(DIScope *Scope, StringRef Name,
697 DIFile *File, unsigned LineNo,
698 DIType *Ty, bool AlwaysPreserve,
699 DINode::DIFlags Flags,
700 uint32_t AlignInBits) {
701 return createLocalVariable(VMContext, PreservedVariables, Scope, Name,
702 /* ArgNo */ 0, File, LineNo, Ty, AlwaysPreserve,
703 Flags, AlignInBits);
704 }
705
createParameterVariable(DIScope * Scope,StringRef Name,unsigned ArgNo,DIFile * File,unsigned LineNo,DIType * Ty,bool AlwaysPreserve,DINode::DIFlags Flags)706 DILocalVariable *DIBuilder::createParameterVariable(
707 DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File,
708 unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags) {
709 assert(ArgNo && "Expected non-zero argument number for parameter");
710 return createLocalVariable(VMContext, PreservedVariables, Scope, Name, ArgNo,
711 File, LineNo, Ty, AlwaysPreserve, Flags,
712 /* AlignInBits */0);
713 }
714
createLabel(DIScope * Scope,StringRef Name,DIFile * File,unsigned LineNo,bool AlwaysPreserve)715 DILabel *DIBuilder::createLabel(
716 DIScope *Scope, StringRef Name, DIFile *File,
717 unsigned LineNo, bool AlwaysPreserve) {
718 DIScope *Context = getNonCompileUnitScope(Scope);
719
720 auto *Node =
721 DILabel::get(VMContext, cast_or_null<DILocalScope>(Context), Name,
722 File, LineNo);
723
724 if (AlwaysPreserve) {
725 /// The optimizer may remove labels. If there is an interest
726 /// to preserve label info in such situation then append it to
727 /// the list of retained nodes of the DISubprogram.
728 DISubprogram *Fn = getDISubprogram(Scope);
729 assert(Fn && "Missing subprogram for label");
730 PreservedLabels[Fn].emplace_back(Node);
731 }
732 return Node;
733 }
734
createExpression(ArrayRef<uint64_t> Addr)735 DIExpression *DIBuilder::createExpression(ArrayRef<uint64_t> Addr) {
736 return DIExpression::get(VMContext, Addr);
737 }
738
createExpression(ArrayRef<int64_t> Signed)739 DIExpression *DIBuilder::createExpression(ArrayRef<int64_t> Signed) {
740 // TODO: Remove the callers of this signed version and delete.
741 SmallVector<uint64_t, 8> Addr(Signed.begin(), Signed.end());
742 return createExpression(Addr);
743 }
744
745 template <class... Ts>
getSubprogram(bool IsDistinct,Ts &&...Args)746 static DISubprogram *getSubprogram(bool IsDistinct, Ts &&... Args) {
747 if (IsDistinct)
748 return DISubprogram::getDistinct(std::forward<Ts>(Args)...);
749 return DISubprogram::get(std::forward<Ts>(Args)...);
750 }
751
createFunction(DIScope * Context,StringRef Name,StringRef LinkageName,DIFile * File,unsigned LineNo,DISubroutineType * Ty,bool isLocalToUnit,bool isDefinition,unsigned ScopeLine,DINode::DIFlags Flags,bool isOptimized,DITemplateParameterArray TParams,DISubprogram * Decl,DITypeArray ThrownTypes)752 DISubprogram *DIBuilder::createFunction(
753 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File,
754 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit,
755 bool isDefinition, unsigned ScopeLine, DINode::DIFlags Flags,
756 bool isOptimized, DITemplateParameterArray TParams, DISubprogram *Decl,
757 DITypeArray ThrownTypes) {
758 auto *Node = getSubprogram(
759 /* IsDistinct = */ isDefinition, VMContext,
760 getNonCompileUnitScope(Context), Name, LinkageName, File, LineNo, Ty,
761 isLocalToUnit, isDefinition, ScopeLine, nullptr, 0, 0, 0, Flags,
762 isOptimized, isDefinition ? CUNode : nullptr, TParams, Decl,
763 MDTuple::getTemporary(VMContext, None).release(), ThrownTypes);
764
765 if (isDefinition)
766 AllSubprograms.push_back(Node);
767 trackIfUnresolved(Node);
768 return Node;
769 }
770
createTempFunctionFwdDecl(DIScope * Context,StringRef Name,StringRef LinkageName,DIFile * File,unsigned LineNo,DISubroutineType * Ty,bool isLocalToUnit,bool isDefinition,unsigned ScopeLine,DINode::DIFlags Flags,bool isOptimized,DITemplateParameterArray TParams,DISubprogram * Decl,DITypeArray ThrownTypes)771 DISubprogram *DIBuilder::createTempFunctionFwdDecl(
772 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File,
773 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit,
774 bool isDefinition, unsigned ScopeLine, DINode::DIFlags Flags,
775 bool isOptimized, DITemplateParameterArray TParams, DISubprogram *Decl,
776 DITypeArray ThrownTypes) {
777 return DISubprogram::getTemporary(
778 VMContext, getNonCompileUnitScope(Context), Name, LinkageName,
779 File, LineNo, Ty, isLocalToUnit, isDefinition, ScopeLine, nullptr,
780 0, 0, 0, Flags, isOptimized, isDefinition ? CUNode : nullptr,
781 TParams, Decl, nullptr, ThrownTypes)
782 .release();
783 }
784
createMethod(DIScope * Context,StringRef Name,StringRef LinkageName,DIFile * F,unsigned LineNo,DISubroutineType * Ty,bool isLocalToUnit,bool isDefinition,unsigned VK,unsigned VIndex,int ThisAdjustment,DIType * VTableHolder,DINode::DIFlags Flags,bool isOptimized,DITemplateParameterArray TParams,DITypeArray ThrownTypes)785 DISubprogram *DIBuilder::createMethod(
786 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F,
787 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit,
788 bool isDefinition, unsigned VK, unsigned VIndex, int ThisAdjustment,
789 DIType *VTableHolder, DINode::DIFlags Flags, bool isOptimized,
790 DITemplateParameterArray TParams, DITypeArray ThrownTypes) {
791 assert(getNonCompileUnitScope(Context) &&
792 "Methods should have both a Context and a context that isn't "
793 "the compile unit.");
794 // FIXME: Do we want to use different scope/lines?
795 auto *SP = getSubprogram(
796 /* IsDistinct = */ isDefinition, VMContext, cast<DIScope>(Context), Name,
797 LinkageName, F, LineNo, Ty, isLocalToUnit, isDefinition, LineNo,
798 VTableHolder, VK, VIndex, ThisAdjustment, Flags, isOptimized,
799 isDefinition ? CUNode : nullptr, TParams, nullptr, nullptr, ThrownTypes);
800
801 if (isDefinition)
802 AllSubprograms.push_back(SP);
803 trackIfUnresolved(SP);
804 return SP;
805 }
806
createNameSpace(DIScope * Scope,StringRef Name,bool ExportSymbols)807 DINamespace *DIBuilder::createNameSpace(DIScope *Scope, StringRef Name,
808 bool ExportSymbols) {
809
810 // It is okay to *not* make anonymous top-level namespaces distinct, because
811 // all nodes that have an anonymous namespace as their parent scope are
812 // guaranteed to be unique and/or are linked to their containing
813 // DICompileUnit. This decision is an explicit tradeoff of link time versus
814 // memory usage versus code simplicity and may get revisited in the future.
815 return DINamespace::get(VMContext, getNonCompileUnitScope(Scope), Name,
816 ExportSymbols);
817 }
818
createModule(DIScope * Scope,StringRef Name,StringRef ConfigurationMacros,StringRef IncludePath,StringRef ISysRoot)819 DIModule *DIBuilder::createModule(DIScope *Scope, StringRef Name,
820 StringRef ConfigurationMacros,
821 StringRef IncludePath,
822 StringRef ISysRoot) {
823 return DIModule::get(VMContext, getNonCompileUnitScope(Scope), Name,
824 ConfigurationMacros, IncludePath, ISysRoot);
825 }
826
createLexicalBlockFile(DIScope * Scope,DIFile * File,unsigned Discriminator)827 DILexicalBlockFile *DIBuilder::createLexicalBlockFile(DIScope *Scope,
828 DIFile *File,
829 unsigned Discriminator) {
830 return DILexicalBlockFile::get(VMContext, Scope, File, Discriminator);
831 }
832
createLexicalBlock(DIScope * Scope,DIFile * File,unsigned Line,unsigned Col)833 DILexicalBlock *DIBuilder::createLexicalBlock(DIScope *Scope, DIFile *File,
834 unsigned Line, unsigned Col) {
835 // Make these distinct, to avoid merging two lexical blocks on the same
836 // file/line/column.
837 return DILexicalBlock::getDistinct(VMContext, getNonCompileUnitScope(Scope),
838 File, Line, Col);
839 }
840
insertDeclare(Value * Storage,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,Instruction * InsertBefore)841 Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
842 DIExpression *Expr, const DILocation *DL,
843 Instruction *InsertBefore) {
844 return insertDeclare(Storage, VarInfo, Expr, DL, InsertBefore->getParent(),
845 InsertBefore);
846 }
847
insertDeclare(Value * Storage,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,BasicBlock * InsertAtEnd)848 Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
849 DIExpression *Expr, const DILocation *DL,
850 BasicBlock *InsertAtEnd) {
851 // If this block already has a terminator then insert this intrinsic before
852 // the terminator. Otherwise, put it at the end of the block.
853 Instruction *InsertBefore = InsertAtEnd->getTerminator();
854 return insertDeclare(Storage, VarInfo, Expr, DL, InsertAtEnd, InsertBefore);
855 }
856
insertLabel(DILabel * LabelInfo,const DILocation * DL,Instruction * InsertBefore)857 Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL,
858 Instruction *InsertBefore) {
859 return insertLabel(
860 LabelInfo, DL, InsertBefore ? InsertBefore->getParent() : nullptr,
861 InsertBefore);
862 }
863
insertLabel(DILabel * LabelInfo,const DILocation * DL,BasicBlock * InsertAtEnd)864 Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL,
865 BasicBlock *InsertAtEnd) {
866 return insertLabel(LabelInfo, DL, InsertAtEnd, nullptr);
867 }
868
insertDbgValueIntrinsic(Value * V,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,Instruction * InsertBefore)869 Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V,
870 DILocalVariable *VarInfo,
871 DIExpression *Expr,
872 const DILocation *DL,
873 Instruction *InsertBefore) {
874 return insertDbgValueIntrinsic(
875 V, VarInfo, Expr, DL, InsertBefore ? InsertBefore->getParent() : nullptr,
876 InsertBefore);
877 }
878
insertDbgValueIntrinsic(Value * V,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,BasicBlock * InsertAtEnd)879 Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V,
880 DILocalVariable *VarInfo,
881 DIExpression *Expr,
882 const DILocation *DL,
883 BasicBlock *InsertAtEnd) {
884 return insertDbgValueIntrinsic(V, VarInfo, Expr, DL, InsertAtEnd, nullptr);
885 }
886
887 /// Return an IRBuilder for inserting dbg.declare and dbg.value intrinsics. This
888 /// abstracts over the various ways to specify an insert position.
getIRBForDbgInsertion(const DILocation * DL,BasicBlock * InsertBB,Instruction * InsertBefore)889 static IRBuilder<> getIRBForDbgInsertion(const DILocation *DL,
890 BasicBlock *InsertBB,
891 Instruction *InsertBefore) {
892 IRBuilder<> B(DL->getContext());
893 if (InsertBefore)
894 B.SetInsertPoint(InsertBefore);
895 else if (InsertBB)
896 B.SetInsertPoint(InsertBB);
897 B.SetCurrentDebugLocation(DL);
898 return B;
899 }
900
getDbgIntrinsicValueImpl(LLVMContext & VMContext,Value * V)901 static Value *getDbgIntrinsicValueImpl(LLVMContext &VMContext, Value *V) {
902 assert(V && "no value passed to dbg intrinsic");
903 return MetadataAsValue::get(VMContext, ValueAsMetadata::get(V));
904 }
905
getDeclareIntrin(Module & M)906 static Function *getDeclareIntrin(Module &M) {
907 return Intrinsic::getDeclaration(&M, UseDbgAddr ? Intrinsic::dbg_addr
908 : Intrinsic::dbg_declare);
909 }
910
insertDeclare(Value * Storage,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,BasicBlock * InsertBB,Instruction * InsertBefore)911 Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo,
912 DIExpression *Expr, const DILocation *DL,
913 BasicBlock *InsertBB, Instruction *InsertBefore) {
914 assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.declare");
915 assert(DL && "Expected debug loc");
916 assert(DL->getScope()->getSubprogram() ==
917 VarInfo->getScope()->getSubprogram() &&
918 "Expected matching subprograms");
919 if (!DeclareFn)
920 DeclareFn = getDeclareIntrin(M);
921
922 trackIfUnresolved(VarInfo);
923 trackIfUnresolved(Expr);
924 Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage),
925 MetadataAsValue::get(VMContext, VarInfo),
926 MetadataAsValue::get(VMContext, Expr)};
927
928 IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
929 return B.CreateCall(DeclareFn, Args);
930 }
931
insertDbgValueIntrinsic(Value * V,DILocalVariable * VarInfo,DIExpression * Expr,const DILocation * DL,BasicBlock * InsertBB,Instruction * InsertBefore)932 Instruction *DIBuilder::insertDbgValueIntrinsic(
933 Value *V, DILocalVariable *VarInfo, DIExpression *Expr,
934 const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) {
935 assert(V && "no value passed to dbg.value");
936 assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.value");
937 assert(DL && "Expected debug loc");
938 assert(DL->getScope()->getSubprogram() ==
939 VarInfo->getScope()->getSubprogram() &&
940 "Expected matching subprograms");
941 if (!ValueFn)
942 ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
943
944 trackIfUnresolved(VarInfo);
945 trackIfUnresolved(Expr);
946 Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V),
947 MetadataAsValue::get(VMContext, VarInfo),
948 MetadataAsValue::get(VMContext, Expr)};
949
950 IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
951 return B.CreateCall(ValueFn, Args);
952 }
953
insertLabel(DILabel * LabelInfo,const DILocation * DL,BasicBlock * InsertBB,Instruction * InsertBefore)954 Instruction *DIBuilder::insertLabel(
955 DILabel *LabelInfo, const DILocation *DL,
956 BasicBlock *InsertBB, Instruction *InsertBefore) {
957 assert(LabelInfo && "empty or invalid DILabel* passed to dbg.label");
958 assert(DL && "Expected debug loc");
959 assert(DL->getScope()->getSubprogram() ==
960 LabelInfo->getScope()->getSubprogram() &&
961 "Expected matching subprograms");
962 if (!LabelFn)
963 LabelFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_label);
964
965 trackIfUnresolved(LabelInfo);
966 Value *Args[] = {MetadataAsValue::get(VMContext, LabelInfo)};
967
968 IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore);
969 return B.CreateCall(LabelFn, Args);
970 }
971
replaceVTableHolder(DICompositeType * & T,DIType * VTableHolder)972 void DIBuilder::replaceVTableHolder(DICompositeType *&T,
973 DIType *VTableHolder) {
974 {
975 TypedTrackingMDRef<DICompositeType> N(T);
976 N->replaceVTableHolder(VTableHolder);
977 T = N.get();
978 }
979
980 // If this didn't create a self-reference, just return.
981 if (T != VTableHolder)
982 return;
983
984 // Look for unresolved operands. T will drop RAUW support, orphaning any
985 // cycles underneath it.
986 if (T->isResolved())
987 for (const MDOperand &O : T->operands())
988 if (auto *N = dyn_cast_or_null<MDNode>(O))
989 trackIfUnresolved(N);
990 }
991
replaceArrays(DICompositeType * & T,DINodeArray Elements,DINodeArray TParams)992 void DIBuilder::replaceArrays(DICompositeType *&T, DINodeArray Elements,
993 DINodeArray TParams) {
994 {
995 TypedTrackingMDRef<DICompositeType> N(T);
996 if (Elements)
997 N->replaceElements(Elements);
998 if (TParams)
999 N->replaceTemplateParams(DITemplateParameterArray(TParams));
1000 T = N.get();
1001 }
1002
1003 // If T isn't resolved, there's no problem.
1004 if (!T->isResolved())
1005 return;
1006
1007 // If T is resolved, it may be due to a self-reference cycle. Track the
1008 // arrays explicitly if they're unresolved, or else the cycles will be
1009 // orphaned.
1010 if (Elements)
1011 trackIfUnresolved(Elements.get());
1012 if (TParams)
1013 trackIfUnresolved(TParams.get());
1014 }
1015