1 //===--- CGDebugInfo.h - DebugInfo for LLVM CodeGen -------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is the source-level debug info generator for llvm translation.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
15 #define LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H
17 #include "CGBuilder.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/Type.h"
20 #include "clang/Basic/SourceLocation.h"
21 #include "clang/Frontend/CodeGenOptions.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/ADT/Optional.h"
24 #include "llvm/IR/DIBuilder.h"
25 #include "llvm/IR/DebugInfo.h"
26 #include "llvm/IR/ValueHandle.h"
27 #include "llvm/Support/Allocator.h"
35 class ClassTemplateSpecializationDecl;
38 class ObjCInterfaceDecl;
45 class CodeGenFunction;
48 /// This class gathers all debug information during compilation and is
49 /// responsible for emitting to llvm globals or pass directly to the
52 friend class ApplyDebugLocation;
53 friend class SaveAndRestoreLocation;
55 const CodeGenOptions::DebugInfoKind DebugKind;
56 bool DebugTypeExtRefs;
57 llvm::DIBuilder DBuilder;
58 llvm::DICompileUnit *TheCU = nullptr;
59 ModuleMap *ClangModuleMap = nullptr;
60 SourceLocation CurLoc;
61 llvm::DIType *VTablePtrType = nullptr;
62 llvm::DIType *ClassTy = nullptr;
63 llvm::DICompositeType *ObjTy = nullptr;
64 llvm::DIType *SelTy = nullptr;
65 llvm::DIType *OCLImage1dDITy = nullptr;
66 llvm::DIType *OCLImage1dArrayDITy = nullptr;
67 llvm::DIType *OCLImage1dBufferDITy = nullptr;
68 llvm::DIType *OCLImage2dDITy = nullptr;
69 llvm::DIType *OCLImage2dArrayDITy = nullptr;
70 llvm::DIType *OCLImage2dDepthDITy = nullptr;
71 llvm::DIType *OCLImage2dArrayDepthDITy = nullptr;
72 llvm::DIType *OCLImage2dMSAADITy = nullptr;
73 llvm::DIType *OCLImage2dArrayMSAADITy = nullptr;
74 llvm::DIType *OCLImage2dMSAADepthDITy = nullptr;
75 llvm::DIType *OCLImage2dArrayMSAADepthDITy = nullptr;
76 llvm::DIType *OCLImage3dDITy = nullptr;
77 llvm::DIType *OCLEventDITy = nullptr;
78 llvm::DIType *OCLClkEventDITy = nullptr;
79 llvm::DIType *OCLQueueDITy = nullptr;
80 llvm::DIType *OCLNDRangeDITy = nullptr;
81 llvm::DIType *OCLReserveIDDITy = nullptr;
83 /// Cache of previously constructed Types.
84 llvm::DenseMap<const void *, llvm::TrackingMDRef> TypeCache;
86 llvm::SmallDenseMap<llvm::StringRef, llvm::StringRef> DebugPrefixMap;
88 struct ObjCInterfaceCacheEntry {
89 const ObjCInterfaceType *Type;
92 ObjCInterfaceCacheEntry(const ObjCInterfaceType *Type, llvm::DIType *Decl,
94 : Type(Type), Decl(Decl), Unit(Unit) {}
97 /// Cache of previously constructed interfaces which may change.
98 llvm::SmallVector<ObjCInterfaceCacheEntry, 32> ObjCInterfaceCache;
100 /// Cache of references to clang modules and precompiled headers.
101 llvm::DenseMap<const Module *, llvm::TrackingMDRef> ModuleCache;
103 /// List of interfaces we want to keep even if orphaned.
104 std::vector<void *> RetainedTypes;
106 /// Cache of forward declared types to RAUW at the end of
108 std::vector<std::pair<const TagType *, llvm::TrackingMDRef>> ReplaceMap;
110 /// Cache of replaceable forward declarartions (functions and
111 /// variables) to RAUW at the end of compilation.
112 std::vector<std::pair<const DeclaratorDecl *, llvm::TrackingMDRef>>
115 /// Keep track of our current nested lexical block.
116 std::vector<llvm::TypedTrackingMDRef<llvm::DIScope>> LexicalBlockStack;
117 llvm::DenseMap<const Decl *, llvm::TrackingMDRef> RegionMap;
118 /// Keep track of LexicalBlockStack counter at the beginning of a
119 /// function. This is used to pop unbalanced regions at the end of a
121 std::vector<unsigned> FnBeginRegionCount;
123 /// This is a storage for names that are constructed on demand. For
124 /// example, C++ destructors, C++ operators etc..
125 llvm::BumpPtrAllocator DebugInfoNames;
128 llvm::DenseMap<const char *, llvm::TrackingMDRef> DIFileCache;
129 llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> SPCache;
130 /// Cache declarations relevant to DW_TAG_imported_declarations (C++
131 /// using declarations) that aren't covered by other more specific caches.
132 llvm::DenseMap<const Decl *, llvm::TrackingMDRef> DeclCache;
133 llvm::DenseMap<const NamespaceDecl *, llvm::TrackingMDRef> NameSpaceCache;
134 llvm::DenseMap<const NamespaceAliasDecl *, llvm::TrackingMDRef>
136 llvm::DenseMap<const Decl *, llvm::TypedTrackingMDRef<llvm::DIDerivedType>>
137 StaticDataMemberCache;
139 /// Helper functions for getOrCreateType.
141 /// Currently the checksum of an interface includes the number of
142 /// ivars and property accessors.
143 llvm::DIType *CreateType(const BuiltinType *Ty);
144 llvm::DIType *CreateType(const ComplexType *Ty);
145 llvm::DIType *CreateQualifiedType(QualType Ty, llvm::DIFile *Fg);
146 llvm::DIType *CreateType(const TypedefType *Ty, llvm::DIFile *Fg);
147 llvm::DIType *CreateType(const TemplateSpecializationType *Ty,
149 llvm::DIType *CreateType(const ObjCObjectPointerType *Ty, llvm::DIFile *F);
150 llvm::DIType *CreateType(const PointerType *Ty, llvm::DIFile *F);
151 llvm::DIType *CreateType(const BlockPointerType *Ty, llvm::DIFile *F);
152 llvm::DIType *CreateType(const FunctionType *Ty, llvm::DIFile *F);
153 /// Get structure or union type.
154 llvm::DIType *CreateType(const RecordType *Tyg);
155 llvm::DIType *CreateTypeDefinition(const RecordType *Ty);
156 llvm::DICompositeType *CreateLimitedType(const RecordType *Ty);
157 void CollectContainingType(const CXXRecordDecl *RD,
158 llvm::DICompositeType *CT);
159 /// Get Objective-C interface type.
160 llvm::DIType *CreateType(const ObjCInterfaceType *Ty, llvm::DIFile *F);
161 llvm::DIType *CreateTypeDefinition(const ObjCInterfaceType *Ty,
163 /// Get Objective-C object type.
164 llvm::DIType *CreateType(const ObjCObjectType *Ty, llvm::DIFile *F);
165 llvm::DIType *CreateType(const VectorType *Ty, llvm::DIFile *F);
166 llvm::DIType *CreateType(const ArrayType *Ty, llvm::DIFile *F);
167 llvm::DIType *CreateType(const LValueReferenceType *Ty, llvm::DIFile *F);
168 llvm::DIType *CreateType(const RValueReferenceType *Ty, llvm::DIFile *Unit);
169 llvm::DIType *CreateType(const MemberPointerType *Ty, llvm::DIFile *F);
170 llvm::DIType *CreateType(const AtomicType *Ty, llvm::DIFile *F);
171 llvm::DIType *CreateType(const PipeType *Ty, llvm::DIFile *F);
172 /// Get enumeration type.
173 llvm::DIType *CreateEnumType(const EnumType *Ty);
174 llvm::DIType *CreateTypeDefinition(const EnumType *Ty);
175 /// Look up the completed type for a self pointer in the TypeCache and
176 /// create a copy of it with the ObjectPointer and Artificial flags
177 /// set. If the type is not cached, a new one is created. This should
178 /// never happen though, since creating a type for the implicit self
179 /// argument implies that we already parsed the interface definition
180 /// and the ivar declarations in the implementation.
181 llvm::DIType *CreateSelfType(const QualType &QualTy, llvm::DIType *Ty);
184 /// Get the type from the cache or return null type if it doesn't
186 llvm::DIType *getTypeOrNull(const QualType);
187 /// Return the debug type for a C++ method.
188 /// \arg CXXMethodDecl is of FunctionType. This function type is
189 /// not updated to include implicit \c this pointer. Use this routine
190 /// to get a method type which includes \c this pointer.
191 llvm::DISubroutineType *getOrCreateMethodType(const CXXMethodDecl *Method,
193 llvm::DISubroutineType *
194 getOrCreateInstanceMethodType(QualType ThisPtr, const FunctionProtoType *Func,
196 llvm::DISubroutineType *
197 getOrCreateFunctionType(const Decl *D, QualType FnType, llvm::DIFile *F);
198 /// \return debug info descriptor for vtable.
199 llvm::DIType *getOrCreateVTablePtrType(llvm::DIFile *F);
200 /// \return namespace descriptor for the given namespace decl.
201 llvm::DINamespace *getOrCreateNameSpace(const NamespaceDecl *N);
202 llvm::DIType *CreatePointerLikeType(llvm::dwarf::Tag Tag, const Type *Ty,
203 QualType PointeeTy, llvm::DIFile *F);
204 llvm::DIType *getOrCreateStructPtrType(StringRef Name, llvm::DIType *&Cache);
206 /// A helper function to create a subprogram for a single member
207 /// function GlobalDecl.
208 llvm::DISubprogram *CreateCXXMemberFunction(const CXXMethodDecl *Method,
210 llvm::DIType *RecordTy);
212 /// A helper function to collect debug info for C++ member
213 /// functions. This is used while creating debug info entry for a
215 void CollectCXXMemberFunctions(const CXXRecordDecl *Decl, llvm::DIFile *F,
216 SmallVectorImpl<llvm::Metadata *> &E,
219 /// A helper function to collect debug info for C++ base
220 /// classes. This is used while creating debug info entry for a
222 void CollectCXXBases(const CXXRecordDecl *Decl, llvm::DIFile *F,
223 SmallVectorImpl<llvm::Metadata *> &EltTys,
224 llvm::DIType *RecordTy);
226 /// A helper function to collect template parameters.
227 llvm::DINodeArray CollectTemplateParams(const TemplateParameterList *TPList,
228 ArrayRef<TemplateArgument> TAList,
230 /// A helper function to collect debug info for function template
232 llvm::DINodeArray CollectFunctionTemplateParams(const FunctionDecl *FD,
235 /// A helper function to collect debug info for template
238 CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
241 llvm::DIType *createFieldType(StringRef name, QualType type,
242 uint64_t sizeInBitsOverride, SourceLocation loc,
243 AccessSpecifier AS, uint64_t offsetInBits,
244 llvm::DIFile *tunit, llvm::DIScope *scope,
245 const RecordDecl *RD = nullptr);
247 /// Helpers for collecting fields of a record.
249 void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
250 SmallVectorImpl<llvm::Metadata *> &E,
251 llvm::DIType *RecordTy);
252 llvm::DIDerivedType *CreateRecordStaticField(const VarDecl *Var,
253 llvm::DIType *RecordTy,
254 const RecordDecl *RD);
255 void CollectRecordNormalField(const FieldDecl *Field, uint64_t OffsetInBits,
257 SmallVectorImpl<llvm::Metadata *> &E,
258 llvm::DIType *RecordTy, const RecordDecl *RD);
259 void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile *F,
260 SmallVectorImpl<llvm::Metadata *> &E,
261 llvm::DICompositeType *RecordTy);
263 /// If the C++ class has vtable info then insert appropriate debug
264 /// info entry in EltTys vector.
265 void CollectVTableInfo(const CXXRecordDecl *Decl, llvm::DIFile *F,
266 SmallVectorImpl<llvm::Metadata *> &EltTys);
269 /// Create a new lexical block node and push it on the stack.
270 void CreateLexicalBlock(SourceLocation Loc);
273 CGDebugInfo(CodeGenModule &CGM);
278 /// Set the main CU's DwoId field to \p Signature.
279 void setDwoId(uint64_t Signature);
281 /// When generating debug information for a clang module or
282 /// precompiled header, this module map will be used to determine
283 /// the module of origin of each Decl.
284 void setModuleMap(ModuleMap &MMap) { ClangModuleMap = &MMap; }
286 /// Update the current source location. If \arg loc is invalid it is
288 void setLocation(SourceLocation Loc);
290 /// Emit metadata to indicate a change in line/column information in
291 /// the source file. If the location is invalid, the previous
292 /// location will be reused.
293 void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
295 /// Emit a call to llvm.dbg.function.start to indicate
296 /// start of a new function.
297 /// \param Loc The location of the function header.
298 /// \param ScopeLoc The location of the function body.
299 void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc,
300 SourceLocation ScopeLoc, QualType FnType,
301 llvm::Function *Fn, CGBuilderTy &Builder);
303 /// Emit debug info for a function declaration.
304 void EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, QualType FnType);
306 /// Constructs the debug code for exiting a function.
307 void EmitFunctionEnd(CGBuilderTy &Builder);
309 /// Emit metadata to indicate the beginning of a new lexical block
310 /// and push the block onto the stack.
311 void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
313 /// Emit metadata to indicate the end of a new lexical block and pop
314 /// the current block.
315 void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
317 /// Emit call to \c llvm.dbg.declare for an automatic variable
319 void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
320 CGBuilderTy &Builder);
322 /// Emit call to \c llvm.dbg.declare for an imported variable
323 /// declaration in a block.
324 void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
325 llvm::Value *storage,
326 CGBuilderTy &Builder,
327 const CGBlockInfo &blockInfo,
328 llvm::Instruction *InsertPoint = nullptr);
330 /// Emit call to \c llvm.dbg.declare for an argument variable
332 void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
333 unsigned ArgNo, CGBuilderTy &Builder);
335 /// Emit call to \c llvm.dbg.declare for the block-literal argument
336 /// to a block invocation function.
337 void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
338 llvm::Value *Arg, unsigned ArgNo,
339 llvm::Value *LocalAddr,
340 CGBuilderTy &Builder);
342 /// Emit information about a global variable.
343 void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
345 /// Emit global variable's debug info.
346 void EmitGlobalVariable(const ValueDecl *VD, llvm::Constant *Init);
348 /// Emit C++ using directive.
349 void EmitUsingDirective(const UsingDirectiveDecl &UD);
351 /// Emit the type explicitly casted to.
352 void EmitExplicitCastType(QualType Ty);
354 /// Emit C++ using declaration.
355 void EmitUsingDecl(const UsingDecl &UD);
357 /// Emit an @import declaration.
358 void EmitImportDecl(const ImportDecl &ID);
360 /// Emit C++ namespace alias.
361 llvm::DIImportedEntity *EmitNamespaceAlias(const NamespaceAliasDecl &NA);
363 /// Emit record type's standalone debug info.
364 llvm::DIType *getOrCreateRecordType(QualType Ty, SourceLocation L);
366 /// Emit an Objective-C interface type standalone debug info.
367 llvm::DIType *getOrCreateInterfaceType(QualType Ty, SourceLocation Loc);
369 /// Emit standalone debug info for a type.
370 llvm::DIType *getOrCreateStandaloneType(QualType Ty, SourceLocation Loc);
372 void completeType(const EnumDecl *ED);
373 void completeType(const RecordDecl *RD);
374 void completeRequiredType(const RecordDecl *RD);
375 void completeClassData(const RecordDecl *RD);
377 void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD);
380 /// Emit call to llvm.dbg.declare for a variable declaration.
381 void EmitDeclare(const VarDecl *decl, llvm::Value *AI,
382 llvm::Optional<unsigned> ArgNo, CGBuilderTy &Builder);
384 /// Build up structure info for the byref. See \a BuildByRefType.
385 llvm::DIType *EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
388 /// Get context info for the DeclContext of \p Decl.
389 llvm::DIScope *getDeclContextDescriptor(const Decl *D);
390 /// Get context info for a given DeclContext \p Decl.
391 llvm::DIScope *getContextDescriptor(const Decl *Context,
392 llvm::DIScope *Default);
394 llvm::DIScope *getCurrentContextDescriptor(const Decl *Decl);
396 /// Create a forward decl for a RecordType in a given context.
397 llvm::DICompositeType *getOrCreateRecordFwdDecl(const RecordType *,
400 /// Return current directory name.
401 StringRef getCurrentDirname();
403 /// Create new compile unit.
404 void CreateCompileUnit();
406 /// Remap a given path with the current debug prefix map
407 std::string remapDIPath(StringRef) const;
409 /// Get the file debug info descriptor for the input location.
410 llvm::DIFile *getOrCreateFile(SourceLocation Loc);
412 /// Get the file info for main compile unit.
413 llvm::DIFile *getOrCreateMainFile();
415 /// Get the type from the cache or create a new type if necessary.
416 llvm::DIType *getOrCreateType(QualType Ty, llvm::DIFile *Fg);
418 /// Get a reference to a clang module. If \p CreateSkeletonCU is true,
419 /// this also creates a split dwarf skeleton compile unit.
421 getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
422 bool CreateSkeletonCU);
424 /// DebugTypeExtRefs: If \p D originated in a clang module, return it.
425 llvm::DIModule *getParentModuleOrNull(const Decl *D);
427 /// Get the type from the cache or create a new partial type if
429 llvm::DICompositeType *getOrCreateLimitedType(const RecordType *Ty,
432 /// Create type metadata for a source language type.
433 llvm::DIType *CreateTypeNode(QualType Ty, llvm::DIFile *Fg);
435 /// Create new member and increase Offset by FType's size.
436 llvm::DIType *CreateMemberType(llvm::DIFile *Unit, QualType FType,
437 StringRef Name, uint64_t *Offset);
439 /// Retrieve the DIDescriptor, if any, for the canonical form of this
441 llvm::DINode *getDeclarationOrDefinition(const Decl *D);
443 /// \return debug info descriptor to describe method
444 /// declaration for the given method definition.
445 llvm::DISubprogram *getFunctionDeclaration(const Decl *D);
447 /// \return debug info descriptor to describe in-class static data
448 /// member declaration for the given out-of-class definition. If D
449 /// is an out-of-class definition of a static data member of a
450 /// class, find its corresponding in-class declaration.
451 llvm::DIDerivedType *
452 getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D);
454 /// Create a subprogram describing the forward declaration
455 /// represented in the given FunctionDecl.
456 llvm::DISubprogram *getFunctionForwardDeclaration(const FunctionDecl *FD);
458 /// Create a global variable describing the forward decalration
459 /// represented in the given VarDecl.
460 llvm::DIGlobalVariable *
461 getGlobalVariableForwardDeclaration(const VarDecl *VD);
463 /// \brief Return a global variable that represents one of the
464 /// collection of global variables created for an anonmyous union.
466 /// Recursively collect all of the member fields of a global
467 /// anonymous decl and create static variables for them. The first
468 /// time this is called it needs to be on a union and then from
469 /// there we can have additional unnamed fields.
470 llvm::DIGlobalVariable *
471 CollectAnonRecordDecls(const RecordDecl *RD, llvm::DIFile *Unit,
472 unsigned LineNo, StringRef LinkageName,
473 llvm::GlobalVariable *Var, llvm::DIScope *DContext);
475 /// Get function name for the given FunctionDecl. If the name is
476 /// constructed on demand (e.g., C++ destructor) then the name is
477 /// stored on the side.
478 StringRef getFunctionName(const FunctionDecl *FD);
480 /// Returns the unmangled name of an Objective-C method.
481 /// This is the display name for the debugging info.
482 StringRef getObjCMethodName(const ObjCMethodDecl *FD);
484 /// Return selector name. This is used for debugging
486 StringRef getSelectorName(Selector S);
488 /// Get class name including template argument list.
489 StringRef getClassName(const RecordDecl *RD);
491 /// Get the vtable name for the given class.
492 StringRef getVTableName(const CXXRecordDecl *Decl);
494 /// Get line number for the location. If location is invalid
495 /// then use current location.
496 unsigned getLineNumber(SourceLocation Loc);
498 /// Get column number for the location. If location is
499 /// invalid then use current location.
500 /// \param Force Assume DebugColumnInfo option is true.
501 unsigned getColumnNumber(SourceLocation Loc, bool Force = false);
503 /// Collect various properties of a FunctionDecl.
504 /// \param GD A GlobalDecl whose getDecl() must return a FunctionDecl.
505 void collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
506 StringRef &Name, StringRef &LinkageName,
507 llvm::DIScope *&FDContext,
508 llvm::DINodeArray &TParamsArray,
511 /// Collect various properties of a VarDecl.
512 void collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
513 unsigned &LineNo, QualType &T, StringRef &Name,
514 StringRef &LinkageName, llvm::DIScope *&VDContext);
516 /// Allocate a copy of \p A using the DebugInfoNames allocator
517 /// and return a reference to it. If multiple arguments are given the strings
518 /// are concatenated.
519 StringRef internString(StringRef A, StringRef B = StringRef()) {
520 char *Data = DebugInfoNames.Allocate<char>(A.size() + B.size());
522 std::memcpy(Data, A.data(), A.size());
524 std::memcpy(Data + A.size(), B.data(), B.size());
525 return StringRef(Data, A.size() + B.size());
529 /// A scoped helper to set the current debug location to the specified
530 /// location or preferred location of the specified Expr.
531 class ApplyDebugLocation {
533 void init(SourceLocation TemporaryLocation, bool DefaultToEmpty = false);
534 ApplyDebugLocation(CodeGenFunction &CGF, bool DefaultToEmpty,
535 SourceLocation TemporaryLocation);
537 llvm::DebugLoc OriginalLocation;
538 CodeGenFunction *CGF;
541 /// Set the location to the (valid) TemporaryLocation.
542 ApplyDebugLocation(CodeGenFunction &CGF, SourceLocation TemporaryLocation);
543 ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E);
544 ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc);
545 ApplyDebugLocation(ApplyDebugLocation &&Other) : CGF(Other.CGF) {
549 ~ApplyDebugLocation();
551 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
552 /// to an artificial debug location that has a valid scope, but no
553 /// line information.
555 /// Artificial locations are useful when emitting compiler-generated
556 /// helper functions that have no source location associated with
557 /// them. The DWARF specification allows the compiler to use the
558 /// special line number 0 to indicate code that can not be
559 /// attributed to any source location. Note that passing an empty
560 /// SourceLocation to CGDebugInfo::setLocation() will result in the
561 /// last valid location being reused.
562 static ApplyDebugLocation CreateArtificial(CodeGenFunction &CGF) {
563 return ApplyDebugLocation(CGF, false, SourceLocation());
565 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
566 /// to an artificial debug location that has a valid scope, but no
567 /// line information.
568 static ApplyDebugLocation
569 CreateDefaultArtificial(CodeGenFunction &CGF,
570 SourceLocation TemporaryLocation) {
571 return ApplyDebugLocation(CGF, false, TemporaryLocation);
574 /// Set the IRBuilder to not attach debug locations. Note that
575 /// passing an empty SourceLocation to \a CGDebugInfo::setLocation()
576 /// will result in the last valid location being reused. Note that
577 /// all instructions that do not have a location at the beginning of
578 /// a function are counted towards to function prologue.
579 static ApplyDebugLocation CreateEmpty(CodeGenFunction &CGF) {
580 return ApplyDebugLocation(CGF, true, SourceLocation());
585 } // namespace CodeGen
588 #endif // LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H