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 /// Get enumeration type.
172 llvm::DIType *CreateEnumType(const EnumType *Ty);
173 llvm::DIType *CreateTypeDefinition(const EnumType *Ty);
174 /// Look up the completed type for a self pointer in the TypeCache and
175 /// create a copy of it with the ObjectPointer and Artificial flags
176 /// set. If the type is not cached, a new one is created. This should
177 /// never happen though, since creating a type for the implicit self
178 /// argument implies that we already parsed the interface definition
179 /// and the ivar declarations in the implementation.
180 llvm::DIType *CreateSelfType(const QualType &QualTy, llvm::DIType *Ty);
183 /// Get the type from the cache or return null type if it doesn't
185 llvm::DIType *getTypeOrNull(const QualType);
186 /// Return the debug type for a C++ method.
187 /// \arg CXXMethodDecl is of FunctionType. This function type is
188 /// not updated to include implicit \c this pointer. Use this routine
189 /// to get a method type which includes \c this pointer.
190 llvm::DISubroutineType *getOrCreateMethodType(const CXXMethodDecl *Method,
192 llvm::DISubroutineType *
193 getOrCreateInstanceMethodType(QualType ThisPtr, const FunctionProtoType *Func,
195 llvm::DISubroutineType *
196 getOrCreateFunctionType(const Decl *D, QualType FnType, llvm::DIFile *F);
197 /// \return debug info descriptor for vtable.
198 llvm::DIType *getOrCreateVTablePtrType(llvm::DIFile *F);
199 /// \return namespace descriptor for the given namespace decl.
200 llvm::DINamespace *getOrCreateNameSpace(const NamespaceDecl *N);
201 llvm::DIType *CreatePointerLikeType(llvm::dwarf::Tag Tag, const Type *Ty,
202 QualType PointeeTy, llvm::DIFile *F);
203 llvm::DIType *getOrCreateStructPtrType(StringRef Name, llvm::DIType *&Cache);
205 /// A helper function to create a subprogram for a single member
206 /// function GlobalDecl.
207 llvm::DISubprogram *CreateCXXMemberFunction(const CXXMethodDecl *Method,
209 llvm::DIType *RecordTy);
211 /// A helper function to collect debug info for C++ member
212 /// functions. This is used while creating debug info entry for a
214 void CollectCXXMemberFunctions(const CXXRecordDecl *Decl, llvm::DIFile *F,
215 SmallVectorImpl<llvm::Metadata *> &E,
218 /// A helper function to collect debug info for C++ base
219 /// classes. This is used while creating debug info entry for a
221 void CollectCXXBases(const CXXRecordDecl *Decl, llvm::DIFile *F,
222 SmallVectorImpl<llvm::Metadata *> &EltTys,
223 llvm::DIType *RecordTy);
225 /// A helper function to collect template parameters.
226 llvm::DINodeArray CollectTemplateParams(const TemplateParameterList *TPList,
227 ArrayRef<TemplateArgument> TAList,
229 /// A helper function to collect debug info for function template
231 llvm::DINodeArray CollectFunctionTemplateParams(const FunctionDecl *FD,
234 /// A helper function to collect debug info for template
237 CollectCXXTemplateParams(const ClassTemplateSpecializationDecl *TS,
240 llvm::DIType *createFieldType(StringRef name, QualType type,
241 uint64_t sizeInBitsOverride, SourceLocation loc,
242 AccessSpecifier AS, uint64_t offsetInBits,
243 llvm::DIFile *tunit, llvm::DIScope *scope,
244 const RecordDecl *RD = nullptr);
246 /// Helpers for collecting fields of a record.
248 void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
249 SmallVectorImpl<llvm::Metadata *> &E,
250 llvm::DIType *RecordTy);
251 llvm::DIDerivedType *CreateRecordStaticField(const VarDecl *Var,
252 llvm::DIType *RecordTy,
253 const RecordDecl *RD);
254 void CollectRecordNormalField(const FieldDecl *Field, uint64_t OffsetInBits,
256 SmallVectorImpl<llvm::Metadata *> &E,
257 llvm::DIType *RecordTy, const RecordDecl *RD);
258 void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile *F,
259 SmallVectorImpl<llvm::Metadata *> &E,
260 llvm::DICompositeType *RecordTy);
262 /// If the C++ class has vtable info then insert appropriate debug
263 /// info entry in EltTys vector.
264 void CollectVTableInfo(const CXXRecordDecl *Decl, llvm::DIFile *F,
265 SmallVectorImpl<llvm::Metadata *> &EltTys);
268 /// Create a new lexical block node and push it on the stack.
269 void CreateLexicalBlock(SourceLocation Loc);
272 CGDebugInfo(CodeGenModule &CGM);
277 /// Set the main CU's DwoId field to \p Signature.
278 void setDwoId(uint64_t Signature);
280 /// When generating debug information for a clang module or
281 /// precompiled header, this module map will be used to determine
282 /// the module of origin of each Decl.
283 void setModuleMap(ModuleMap &MMap) { ClangModuleMap = &MMap; }
285 /// Update the current source location. If \arg loc is invalid it is
287 void setLocation(SourceLocation Loc);
289 /// Emit metadata to indicate a change in line/column information in
290 /// the source file. If the location is invalid, the previous
291 /// location will be reused.
292 void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc);
294 /// Emit a call to llvm.dbg.function.start to indicate
295 /// start of a new function.
296 /// \param Loc The location of the function header.
297 /// \param ScopeLoc The location of the function body.
298 void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc,
299 SourceLocation ScopeLoc, QualType FnType,
300 llvm::Function *Fn, CGBuilderTy &Builder);
302 /// Emit debug info for a function declaration.
303 void EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, QualType FnType);
305 /// Constructs the debug code for exiting a function.
306 void EmitFunctionEnd(CGBuilderTy &Builder);
308 /// Emit metadata to indicate the beginning of a new lexical block
309 /// and push the block onto the stack.
310 void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc);
312 /// Emit metadata to indicate the end of a new lexical block and pop
313 /// the current block.
314 void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc);
316 /// Emit call to \c llvm.dbg.declare for an automatic variable
318 void EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI,
319 CGBuilderTy &Builder);
321 /// Emit call to \c llvm.dbg.declare for an imported variable
322 /// declaration in a block.
323 void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable,
324 llvm::Value *storage,
325 CGBuilderTy &Builder,
326 const CGBlockInfo &blockInfo,
327 llvm::Instruction *InsertPoint = nullptr);
329 /// Emit call to \c llvm.dbg.declare for an argument variable
331 void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
332 unsigned ArgNo, CGBuilderTy &Builder);
334 /// Emit call to \c llvm.dbg.declare for the block-literal argument
335 /// to a block invocation function.
336 void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
337 llvm::Value *Arg, unsigned ArgNo,
338 llvm::Value *LocalAddr,
339 CGBuilderTy &Builder);
341 /// Emit information about a global variable.
342 void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
344 /// Emit global variable's debug info.
345 void EmitGlobalVariable(const ValueDecl *VD, llvm::Constant *Init);
347 /// Emit C++ using directive.
348 void EmitUsingDirective(const UsingDirectiveDecl &UD);
350 /// Emit the type explicitly casted to.
351 void EmitExplicitCastType(QualType Ty);
353 /// Emit C++ using declaration.
354 void EmitUsingDecl(const UsingDecl &UD);
356 /// Emit an @import declaration.
357 void EmitImportDecl(const ImportDecl &ID);
359 /// Emit C++ namespace alias.
360 llvm::DIImportedEntity *EmitNamespaceAlias(const NamespaceAliasDecl &NA);
362 /// Emit record type's standalone debug info.
363 llvm::DIType *getOrCreateRecordType(QualType Ty, SourceLocation L);
365 /// Emit an Objective-C interface type standalone debug info.
366 llvm::DIType *getOrCreateInterfaceType(QualType Ty, SourceLocation Loc);
368 /// Emit standalone debug info for a type.
369 llvm::DIType *getOrCreateStandaloneType(QualType Ty, SourceLocation Loc);
371 void completeType(const EnumDecl *ED);
372 void completeType(const RecordDecl *RD);
373 void completeRequiredType(const RecordDecl *RD);
374 void completeClassData(const RecordDecl *RD);
376 void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD);
379 /// Emit call to llvm.dbg.declare for a variable declaration.
380 void EmitDeclare(const VarDecl *decl, llvm::Value *AI,
381 llvm::Optional<unsigned> ArgNo, CGBuilderTy &Builder);
383 /// Build up structure info for the byref. See \a BuildByRefType.
384 llvm::DIType *EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
387 /// Get context info for the DeclContext of \p Decl.
388 llvm::DIScope *getDeclContextDescriptor(const Decl *D);
389 /// Get context info for a given DeclContext \p Decl.
390 llvm::DIScope *getContextDescriptor(const Decl *Context,
391 llvm::DIScope *Default);
393 llvm::DIScope *getCurrentContextDescriptor(const Decl *Decl);
395 /// Create a forward decl for a RecordType in a given context.
396 llvm::DICompositeType *getOrCreateRecordFwdDecl(const RecordType *,
399 /// Return current directory name.
400 StringRef getCurrentDirname();
402 /// Create new compile unit.
403 void CreateCompileUnit();
405 /// Remap a given path with the current debug prefix map
406 std::string remapDIPath(StringRef) const;
408 /// Get the file debug info descriptor for the input location.
409 llvm::DIFile *getOrCreateFile(SourceLocation Loc);
411 /// Get the file info for main compile unit.
412 llvm::DIFile *getOrCreateMainFile();
414 /// Get the type from the cache or create a new type if necessary.
415 llvm::DIType *getOrCreateType(QualType Ty, llvm::DIFile *Fg);
417 /// Get a reference to a clang module. If \p CreateSkeletonCU is true,
418 /// this also creates a split dwarf skeleton compile unit.
420 getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
421 bool CreateSkeletonCU);
423 /// DebugTypeExtRefs: If \p D originated in a clang module, return it.
424 llvm::DIModule *getParentModuleOrNull(const Decl *D);
426 /// Get the type from the cache or create a new partial type if
428 llvm::DICompositeType *getOrCreateLimitedType(const RecordType *Ty,
431 /// Create type metadata for a source language type.
432 llvm::DIType *CreateTypeNode(QualType Ty, llvm::DIFile *Fg);
434 /// Create new member and increase Offset by FType's size.
435 llvm::DIType *CreateMemberType(llvm::DIFile *Unit, QualType FType,
436 StringRef Name, uint64_t *Offset);
438 /// Retrieve the DIDescriptor, if any, for the canonical form of this
440 llvm::DINode *getDeclarationOrDefinition(const Decl *D);
442 /// \return debug info descriptor to describe method
443 /// declaration for the given method definition.
444 llvm::DISubprogram *getFunctionDeclaration(const Decl *D);
446 /// \return debug info descriptor to describe in-class static data
447 /// member declaration for the given out-of-class definition. If D
448 /// is an out-of-class definition of a static data member of a
449 /// class, find its corresponding in-class declaration.
450 llvm::DIDerivedType *
451 getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D);
453 /// Create a subprogram describing the forward declaration
454 /// represented in the given FunctionDecl.
455 llvm::DISubprogram *getFunctionForwardDeclaration(const FunctionDecl *FD);
457 /// Create a global variable describing the forward decalration
458 /// represented in the given VarDecl.
459 llvm::DIGlobalVariable *
460 getGlobalVariableForwardDeclaration(const VarDecl *VD);
462 /// \brief Return a global variable that represents one of the
463 /// collection of global variables created for an anonmyous union.
465 /// Recursively collect all of the member fields of a global
466 /// anonymous decl and create static variables for them. The first
467 /// time this is called it needs to be on a union and then from
468 /// there we can have additional unnamed fields.
469 llvm::DIGlobalVariable *
470 CollectAnonRecordDecls(const RecordDecl *RD, llvm::DIFile *Unit,
471 unsigned LineNo, StringRef LinkageName,
472 llvm::GlobalVariable *Var, llvm::DIScope *DContext);
474 /// Get function name for the given FunctionDecl. If the name is
475 /// constructed on demand (e.g., C++ destructor) then the name is
476 /// stored on the side.
477 StringRef getFunctionName(const FunctionDecl *FD);
479 /// Returns the unmangled name of an Objective-C method.
480 /// This is the display name for the debugging info.
481 StringRef getObjCMethodName(const ObjCMethodDecl *FD);
483 /// Return selector name. This is used for debugging
485 StringRef getSelectorName(Selector S);
487 /// Get class name including template argument list.
488 StringRef getClassName(const RecordDecl *RD);
490 /// Get the vtable name for the given class.
491 StringRef getVTableName(const CXXRecordDecl *Decl);
493 /// Get line number for the location. If location is invalid
494 /// then use current location.
495 unsigned getLineNumber(SourceLocation Loc);
497 /// Get column number for the location. If location is
498 /// invalid then use current location.
499 /// \param Force Assume DebugColumnInfo option is true.
500 unsigned getColumnNumber(SourceLocation Loc, bool Force = false);
502 /// Collect various properties of a FunctionDecl.
503 /// \param GD A GlobalDecl whose getDecl() must return a FunctionDecl.
504 void collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
505 StringRef &Name, StringRef &LinkageName,
506 llvm::DIScope *&FDContext,
507 llvm::DINodeArray &TParamsArray,
510 /// Collect various properties of a VarDecl.
511 void collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
512 unsigned &LineNo, QualType &T, StringRef &Name,
513 StringRef &LinkageName, llvm::DIScope *&VDContext);
515 /// Allocate a copy of \p A using the DebugInfoNames allocator
516 /// and return a reference to it. If multiple arguments are given the strings
517 /// are concatenated.
518 StringRef internString(StringRef A, StringRef B = StringRef()) {
519 char *Data = DebugInfoNames.Allocate<char>(A.size() + B.size());
521 std::memcpy(Data, A.data(), A.size());
523 std::memcpy(Data + A.size(), B.data(), B.size());
524 return StringRef(Data, A.size() + B.size());
528 /// A scoped helper to set the current debug location to the specified
529 /// location or preferred location of the specified Expr.
530 class ApplyDebugLocation {
532 void init(SourceLocation TemporaryLocation, bool DefaultToEmpty = false);
533 ApplyDebugLocation(CodeGenFunction &CGF, bool DefaultToEmpty,
534 SourceLocation TemporaryLocation);
536 llvm::DebugLoc OriginalLocation;
537 CodeGenFunction *CGF;
540 /// Set the location to the (valid) TemporaryLocation.
541 ApplyDebugLocation(CodeGenFunction &CGF, SourceLocation TemporaryLocation);
542 ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E);
543 ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc);
544 ApplyDebugLocation(ApplyDebugLocation &&Other) : CGF(Other.CGF) {
548 ~ApplyDebugLocation();
550 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
551 /// to an artificial debug location that has a valid scope, but no
552 /// line information.
554 /// Artificial locations are useful when emitting compiler-generated
555 /// helper functions that have no source location associated with
556 /// them. The DWARF specification allows the compiler to use the
557 /// special line number 0 to indicate code that can not be
558 /// attributed to any source location. Note that passing an empty
559 /// SourceLocation to CGDebugInfo::setLocation() will result in the
560 /// last valid location being reused.
561 static ApplyDebugLocation CreateArtificial(CodeGenFunction &CGF) {
562 return ApplyDebugLocation(CGF, false, SourceLocation());
564 /// \brief Apply TemporaryLocation if it is valid. Otherwise switch
565 /// to an artificial debug location that has a valid scope, but no
566 /// line information.
567 static ApplyDebugLocation
568 CreateDefaultArtificial(CodeGenFunction &CGF,
569 SourceLocation TemporaryLocation) {
570 return ApplyDebugLocation(CGF, false, TemporaryLocation);
573 /// Set the IRBuilder to not attach debug locations. Note that
574 /// passing an empty SourceLocation to \a CGDebugInfo::setLocation()
575 /// will result in the last valid location being reused. Note that
576 /// all instructions that do not have a location at the beginning of
577 /// a function are counted towards to function prologue.
578 static ApplyDebugLocation CreateEmpty(CodeGenFunction &CGF) {
579 return ApplyDebugLocation(CGF, true, SourceLocation());
584 } // namespace CodeGen
587 #endif // LLVM_CLANG_LIB_CODEGEN_CGDEBUGINFO_H