1 //===--- ItaniumMangle.cpp - Itanium C++ Name Mangling ----------*- 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 // Implements C++ name mangling according to the Itanium C++ ABI,
11 // which is used in GCC 3.2 and newer (and many compilers that are
12 // ABI-compatible with GCC):
14 // http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling
16 //===----------------------------------------------------------------------===//
17 #include "clang/AST/Mangle.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/Attr.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclObjC.h"
23 #include "clang/AST/DeclOpenMP.h"
24 #include "clang/AST/DeclTemplate.h"
25 #include "clang/AST/Expr.h"
26 #include "clang/AST/ExprCXX.h"
27 #include "clang/AST/ExprObjC.h"
28 #include "clang/AST/TypeLoc.h"
29 #include "clang/Basic/ABI.h"
30 #include "clang/Basic/SourceManager.h"
31 #include "clang/Basic/TargetInfo.h"
32 #include "llvm/ADT/StringExtras.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/raw_ostream.h"
36 #define MANGLE_CHECKER 0
42 using namespace clang;
46 /// Retrieve the declaration context that should be used when mangling the given
48 static const DeclContext *getEffectiveDeclContext(const Decl *D) {
49 // The ABI assumes that lambda closure types that occur within
50 // default arguments live in the context of the function. However, due to
51 // the way in which Clang parses and creates function declarations, this is
52 // not the case: the lambda closure type ends up living in the context
53 // where the function itself resides, because the function declaration itself
54 // had not yet been created. Fix the context here.
55 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
57 if (ParmVarDecl *ContextParam
58 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
59 return ContextParam->getDeclContext();
62 // Perform the same check for block literals.
63 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
64 if (ParmVarDecl *ContextParam
65 = dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
66 return ContextParam->getDeclContext();
69 const DeclContext *DC = D->getDeclContext();
70 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC)) {
71 return getEffectiveDeclContext(cast<Decl>(DC));
74 if (const auto *VD = dyn_cast<VarDecl>(D))
76 return VD->getASTContext().getTranslationUnitDecl();
78 if (const auto *FD = dyn_cast<FunctionDecl>(D))
80 return FD->getASTContext().getTranslationUnitDecl();
82 return DC->getRedeclContext();
85 static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
86 return getEffectiveDeclContext(cast<Decl>(DC));
89 static bool isLocalContainerContext(const DeclContext *DC) {
90 return isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC) || isa<BlockDecl>(DC);
93 static const RecordDecl *GetLocalClassDecl(const Decl *D) {
94 const DeclContext *DC = getEffectiveDeclContext(D);
95 while (!DC->isNamespace() && !DC->isTranslationUnit()) {
96 if (isLocalContainerContext(DC))
97 return dyn_cast<RecordDecl>(D);
99 DC = getEffectiveDeclContext(D);
104 static const FunctionDecl *getStructor(const FunctionDecl *fn) {
105 if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate())
106 return ftd->getTemplatedDecl();
111 static const NamedDecl *getStructor(const NamedDecl *decl) {
112 const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl);
113 return (fn ? getStructor(fn) : decl);
116 static bool isLambda(const NamedDecl *ND) {
117 const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(ND);
121 return Record->isLambda();
124 static const unsigned UnknownArity = ~0U;
126 class ItaniumMangleContextImpl : public ItaniumMangleContext {
127 typedef std::pair<const DeclContext*, IdentifierInfo*> DiscriminatorKeyTy;
128 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
129 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier;
132 explicit ItaniumMangleContextImpl(ASTContext &Context,
133 DiagnosticsEngine &Diags)
134 : ItaniumMangleContext(Context, Diags) {}
136 /// @name Mangler Entry Points
139 bool shouldMangleCXXName(const NamedDecl *D) override;
140 bool shouldMangleStringLiteral(const StringLiteral *) override {
143 void mangleCXXName(const NamedDecl *D, raw_ostream &) override;
144 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
145 raw_ostream &) override;
146 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
147 const ThisAdjustment &ThisAdjustment,
148 raw_ostream &) override;
149 void mangleReferenceTemporary(const VarDecl *D, unsigned ManglingNumber,
150 raw_ostream &) override;
151 void mangleCXXVTable(const CXXRecordDecl *RD, raw_ostream &) override;
152 void mangleCXXVTT(const CXXRecordDecl *RD, raw_ostream &) override;
153 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
154 const CXXRecordDecl *Type, raw_ostream &) override;
155 void mangleCXXRTTI(QualType T, raw_ostream &) override;
156 void mangleCXXRTTIName(QualType T, raw_ostream &) override;
157 void mangleTypeName(QualType T, raw_ostream &) override;
158 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
159 raw_ostream &) override;
160 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
161 raw_ostream &) override;
163 void mangleCXXCtorComdat(const CXXConstructorDecl *D, raw_ostream &) override;
164 void mangleCXXDtorComdat(const CXXDestructorDecl *D, raw_ostream &) override;
165 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &) override;
166 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
167 void mangleDynamicAtExitDestructor(const VarDecl *D,
168 raw_ostream &Out) override;
169 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
170 raw_ostream &Out) override;
171 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
172 raw_ostream &Out) override;
173 void mangleItaniumThreadLocalInit(const VarDecl *D, raw_ostream &) override;
174 void mangleItaniumThreadLocalWrapper(const VarDecl *D,
175 raw_ostream &) override;
177 void mangleStringLiteral(const StringLiteral *, raw_ostream &) override;
179 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
180 // Lambda closure types are already numbered.
184 // Anonymous tags are already numbered.
185 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
186 if (Tag->getName().empty() && !Tag->getTypedefNameForAnonDecl())
190 // Use the canonical number for externally visible decls.
191 if (ND->isExternallyVisible()) {
192 unsigned discriminator = getASTContext().getManglingNumber(ND);
193 if (discriminator == 1)
195 disc = discriminator - 2;
199 // Make up a reasonable number for internal decls.
200 unsigned &discriminator = Uniquifier[ND];
201 if (!discriminator) {
202 const DeclContext *DC = getEffectiveDeclContext(ND);
203 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
205 if (discriminator == 1)
207 disc = discriminator-2;
213 /// Manage the mangling of a single name.
214 class CXXNameMangler {
215 ItaniumMangleContextImpl &Context;
217 bool NullOut = false;
218 /// In the "DisableDerivedAbiTags" mode derived ABI tags are not calculated.
219 /// This mode is used when mangler creates another mangler recursively to
220 /// calculate ABI tags for the function return value or the variable type.
221 /// Also it is required to avoid infinite recursion in some cases.
222 bool DisableDerivedAbiTags = false;
224 /// The "structor" is the top-level declaration being mangled, if
225 /// that's not a template specialization; otherwise it's the pattern
226 /// for that specialization.
227 const NamedDecl *Structor;
228 unsigned StructorType;
230 /// The next substitution sequence number.
233 class FunctionTypeDepthState {
236 enum { InResultTypeMask = 1 };
239 FunctionTypeDepthState() : Bits(0) {}
241 /// The number of function types we're inside.
242 unsigned getDepth() const {
246 /// True if we're in the return type of the innermost function type.
247 bool isInResultType() const {
248 return Bits & InResultTypeMask;
251 FunctionTypeDepthState push() {
252 FunctionTypeDepthState tmp = *this;
253 Bits = (Bits & ~InResultTypeMask) + 2;
257 void enterResultType() {
258 Bits |= InResultTypeMask;
261 void leaveResultType() {
262 Bits &= ~InResultTypeMask;
265 void pop(FunctionTypeDepthState saved) {
266 assert(getDepth() == saved.getDepth() + 1);
272 // abi_tag is a gcc attribute, taking one or more strings called "tags".
273 // The goal is to annotate against which version of a library an object was
274 // built and to be able to provide backwards compatibility ("dual abi").
275 // For more information see docs/ItaniumMangleAbiTags.rst.
276 typedef SmallVector<StringRef, 4> AbiTagList;
278 // State to gather all implicit and explicit tags used in a mangled name.
279 // Must always have an instance of this while emitting any name to keep
281 class AbiTagState final {
283 explicit AbiTagState(AbiTagState *&Head) : LinkHead(Head) {
289 AbiTagState(const AbiTagState &) = delete;
290 AbiTagState &operator=(const AbiTagState &) = delete;
292 ~AbiTagState() { pop(); }
294 void write(raw_ostream &Out, const NamedDecl *ND,
295 const AbiTagList *AdditionalAbiTags) {
296 ND = cast<NamedDecl>(ND->getCanonicalDecl());
297 if (!isa<FunctionDecl>(ND) && !isa<VarDecl>(ND)) {
299 !AdditionalAbiTags &&
300 "only function and variables need a list of additional abi tags");
301 if (const auto *NS = dyn_cast<NamespaceDecl>(ND)) {
302 if (const auto *AbiTag = NS->getAttr<AbiTagAttr>()) {
303 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
304 AbiTag->tags().end());
306 // Don't emit abi tags for namespaces.
312 if (const auto *AbiTag = ND->getAttr<AbiTagAttr>()) {
313 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
314 AbiTag->tags().end());
315 TagList.insert(TagList.end(), AbiTag->tags().begin(),
316 AbiTag->tags().end());
319 if (AdditionalAbiTags) {
320 UsedAbiTags.insert(UsedAbiTags.end(), AdditionalAbiTags->begin(),
321 AdditionalAbiTags->end());
322 TagList.insert(TagList.end(), AdditionalAbiTags->begin(),
323 AdditionalAbiTags->end());
326 std::sort(TagList.begin(), TagList.end());
327 TagList.erase(std::unique(TagList.begin(), TagList.end()), TagList.end());
329 writeSortedUniqueAbiTags(Out, TagList);
332 const AbiTagList &getUsedAbiTags() const { return UsedAbiTags; }
333 void setUsedAbiTags(const AbiTagList &AbiTags) {
334 UsedAbiTags = AbiTags;
337 const AbiTagList &getEmittedAbiTags() const {
338 return EmittedAbiTags;
341 const AbiTagList &getSortedUniqueUsedAbiTags() {
342 std::sort(UsedAbiTags.begin(), UsedAbiTags.end());
343 UsedAbiTags.erase(std::unique(UsedAbiTags.begin(), UsedAbiTags.end()),
349 //! All abi tags used implicitly or explicitly.
350 AbiTagList UsedAbiTags;
351 //! All explicit abi tags (i.e. not from namespace).
352 AbiTagList EmittedAbiTags;
354 AbiTagState *&LinkHead;
355 AbiTagState *Parent = nullptr;
358 assert(LinkHead == this &&
359 "abi tag link head must point to us on destruction");
361 Parent->UsedAbiTags.insert(Parent->UsedAbiTags.end(),
362 UsedAbiTags.begin(), UsedAbiTags.end());
363 Parent->EmittedAbiTags.insert(Parent->EmittedAbiTags.end(),
364 EmittedAbiTags.begin(),
365 EmittedAbiTags.end());
370 void writeSortedUniqueAbiTags(raw_ostream &Out, const AbiTagList &AbiTags) {
371 for (const auto &Tag : AbiTags) {
372 EmittedAbiTags.push_back(Tag);
380 AbiTagState *AbiTags = nullptr;
381 AbiTagState AbiTagsRoot;
383 llvm::DenseMap<uintptr_t, unsigned> Substitutions;
384 llvm::DenseMap<StringRef, unsigned> ModuleSubstitutions;
386 ASTContext &getASTContext() const { return Context.getASTContext(); }
389 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
390 const NamedDecl *D = nullptr, bool NullOut_ = false)
391 : Context(C), Out(Out_), NullOut(NullOut_), Structor(getStructor(D)),
392 StructorType(0), SeqID(0), AbiTagsRoot(AbiTags) {
393 // These can't be mangled without a ctor type or dtor type.
394 assert(!D || (!isa<CXXDestructorDecl>(D) &&
395 !isa<CXXConstructorDecl>(D)));
397 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
398 const CXXConstructorDecl *D, CXXCtorType Type)
399 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
400 SeqID(0), AbiTagsRoot(AbiTags) { }
401 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
402 const CXXDestructorDecl *D, CXXDtorType Type)
403 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
404 SeqID(0), AbiTagsRoot(AbiTags) { }
406 CXXNameMangler(CXXNameMangler &Outer, raw_ostream &Out_)
407 : Context(Outer.Context), Out(Out_), NullOut(false),
408 Structor(Outer.Structor), StructorType(Outer.StructorType),
409 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
410 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
412 CXXNameMangler(CXXNameMangler &Outer, llvm::raw_null_ostream &Out_)
413 : Context(Outer.Context), Out(Out_), NullOut(true),
414 Structor(Outer.Structor), StructorType(Outer.StructorType),
415 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
416 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
420 if (Out.str()[0] == '\01')
424 char *result = abi::__cxa_demangle(Out.str().str().c_str(), 0, 0, &status);
425 assert(status == 0 && "Could not demangle mangled name!");
429 raw_ostream &getStream() { return Out; }
431 void disableDerivedAbiTags() { DisableDerivedAbiTags = true; }
432 static bool shouldHaveAbiTags(ItaniumMangleContextImpl &C, const VarDecl *VD);
434 void mangle(const NamedDecl *D);
435 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual);
436 void mangleNumber(const llvm::APSInt &I);
437 void mangleNumber(int64_t Number);
438 void mangleFloat(const llvm::APFloat &F);
439 void mangleFunctionEncoding(const FunctionDecl *FD);
440 void mangleSeqID(unsigned SeqID);
441 void mangleName(const NamedDecl *ND);
442 void mangleType(QualType T);
443 void mangleNameOrStandardSubstitution(const NamedDecl *ND);
447 bool mangleSubstitution(const NamedDecl *ND);
448 bool mangleSubstitution(QualType T);
449 bool mangleSubstitution(TemplateName Template);
450 bool mangleSubstitution(uintptr_t Ptr);
452 void mangleExistingSubstitution(TemplateName name);
454 bool mangleStandardSubstitution(const NamedDecl *ND);
456 void addSubstitution(const NamedDecl *ND) {
457 ND = cast<NamedDecl>(ND->getCanonicalDecl());
459 addSubstitution(reinterpret_cast<uintptr_t>(ND));
461 void addSubstitution(QualType T);
462 void addSubstitution(TemplateName Template);
463 void addSubstitution(uintptr_t Ptr);
464 // Destructive copy substitutions from other mangler.
465 void extendSubstitutions(CXXNameMangler* Other);
467 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
468 bool recursive = false);
469 void mangleUnresolvedName(NestedNameSpecifier *qualifier,
470 DeclarationName name,
471 const TemplateArgumentLoc *TemplateArgs,
472 unsigned NumTemplateArgs,
473 unsigned KnownArity = UnknownArity);
475 void mangleFunctionEncodingBareType(const FunctionDecl *FD);
477 void mangleNameWithAbiTags(const NamedDecl *ND,
478 const AbiTagList *AdditionalAbiTags);
479 void mangleModuleName(const Module *M);
480 void mangleModuleNamePrefix(StringRef Name);
481 void mangleTemplateName(const TemplateDecl *TD,
482 const TemplateArgument *TemplateArgs,
483 unsigned NumTemplateArgs);
484 void mangleUnqualifiedName(const NamedDecl *ND,
485 const AbiTagList *AdditionalAbiTags) {
486 mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity,
489 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name,
491 const AbiTagList *AdditionalAbiTags);
492 void mangleUnscopedName(const NamedDecl *ND,
493 const AbiTagList *AdditionalAbiTags);
494 void mangleUnscopedTemplateName(const TemplateDecl *ND,
495 const AbiTagList *AdditionalAbiTags);
496 void mangleUnscopedTemplateName(TemplateName,
497 const AbiTagList *AdditionalAbiTags);
498 void mangleSourceName(const IdentifierInfo *II);
499 void mangleRegCallName(const IdentifierInfo *II);
500 void mangleSourceNameWithAbiTags(
501 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags = nullptr);
502 void mangleLocalName(const Decl *D,
503 const AbiTagList *AdditionalAbiTags);
504 void mangleBlockForPrefix(const BlockDecl *Block);
505 void mangleUnqualifiedBlock(const BlockDecl *Block);
506 void mangleLambda(const CXXRecordDecl *Lambda);
507 void mangleNestedName(const NamedDecl *ND, const DeclContext *DC,
508 const AbiTagList *AdditionalAbiTags,
509 bool NoFunction=false);
510 void mangleNestedName(const TemplateDecl *TD,
511 const TemplateArgument *TemplateArgs,
512 unsigned NumTemplateArgs);
513 void manglePrefix(NestedNameSpecifier *qualifier);
514 void manglePrefix(const DeclContext *DC, bool NoFunction=false);
515 void manglePrefix(QualType type);
516 void mangleTemplatePrefix(const TemplateDecl *ND, bool NoFunction=false);
517 void mangleTemplatePrefix(TemplateName Template);
518 bool mangleUnresolvedTypeOrSimpleId(QualType DestroyedType,
519 StringRef Prefix = "");
520 void mangleOperatorName(DeclarationName Name, unsigned Arity);
521 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity);
522 void mangleVendorQualifier(StringRef qualifier);
523 void mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST = nullptr);
524 void mangleRefQualifier(RefQualifierKind RefQualifier);
526 void mangleObjCMethodName(const ObjCMethodDecl *MD);
528 // Declare manglers for every type class.
529 #define ABSTRACT_TYPE(CLASS, PARENT)
530 #define NON_CANONICAL_TYPE(CLASS, PARENT)
531 #define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T);
532 #include "clang/AST/TypeNodes.def"
534 void mangleType(const TagType*);
535 void mangleType(TemplateName);
536 static StringRef getCallingConvQualifierName(CallingConv CC);
537 void mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo info);
538 void mangleExtFunctionInfo(const FunctionType *T);
539 void mangleBareFunctionType(const FunctionProtoType *T, bool MangleReturnType,
540 const FunctionDecl *FD = nullptr);
541 void mangleNeonVectorType(const VectorType *T);
542 void mangleAArch64NeonVectorType(const VectorType *T);
544 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value);
545 void mangleMemberExprBase(const Expr *base, bool isArrow);
546 void mangleMemberExpr(const Expr *base, bool isArrow,
547 NestedNameSpecifier *qualifier,
548 NamedDecl *firstQualifierLookup,
549 DeclarationName name,
550 const TemplateArgumentLoc *TemplateArgs,
551 unsigned NumTemplateArgs,
552 unsigned knownArity);
553 void mangleCastExpression(const Expr *E, StringRef CastEncoding);
554 void mangleInitListElements(const InitListExpr *InitList);
555 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity);
556 void mangleCXXCtorType(CXXCtorType T, const CXXRecordDecl *InheritedFrom);
557 void mangleCXXDtorType(CXXDtorType T);
559 void mangleTemplateArgs(const TemplateArgumentLoc *TemplateArgs,
560 unsigned NumTemplateArgs);
561 void mangleTemplateArgs(const TemplateArgument *TemplateArgs,
562 unsigned NumTemplateArgs);
563 void mangleTemplateArgs(const TemplateArgumentList &AL);
564 void mangleTemplateArg(TemplateArgument A);
566 void mangleTemplateParameter(unsigned Index);
568 void mangleFunctionParam(const ParmVarDecl *parm);
570 void writeAbiTags(const NamedDecl *ND,
571 const AbiTagList *AdditionalAbiTags);
573 // Returns sorted unique list of ABI tags.
574 AbiTagList makeFunctionReturnTypeTags(const FunctionDecl *FD);
575 // Returns sorted unique list of ABI tags.
576 AbiTagList makeVariableTypeTags(const VarDecl *VD);
581 bool ItaniumMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
582 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
584 LanguageLinkage L = FD->getLanguageLinkage();
585 // Overloadable functions need mangling.
586 if (FD->hasAttr<OverloadableAttr>())
589 // "main" is not mangled.
593 // C++ functions and those whose names are not a simple identifier need
595 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
598 // C functions are not mangled.
599 if (L == CLanguageLinkage)
603 // Otherwise, no mangling is done outside C++ mode.
604 if (!getASTContext().getLangOpts().CPlusPlus)
607 const VarDecl *VD = dyn_cast<VarDecl>(D);
608 if (VD && !isa<DecompositionDecl>(D)) {
609 // C variables are not mangled.
613 // Variables at global scope with non-internal linkage are not mangled
614 const DeclContext *DC = getEffectiveDeclContext(D);
615 // Check for extern variable declared locally.
616 if (DC->isFunctionOrMethod() && D->hasLinkage())
617 while (!DC->isNamespace() && !DC->isTranslationUnit())
618 DC = getEffectiveParentContext(DC);
619 if (DC->isTranslationUnit() && D->getFormalLinkage() != InternalLinkage &&
620 !CXXNameMangler::shouldHaveAbiTags(*this, VD) &&
621 !isa<VarTemplateSpecializationDecl>(D))
628 void CXXNameMangler::writeAbiTags(const NamedDecl *ND,
629 const AbiTagList *AdditionalAbiTags) {
630 assert(AbiTags && "require AbiTagState");
631 AbiTags->write(Out, ND, DisableDerivedAbiTags ? nullptr : AdditionalAbiTags);
634 void CXXNameMangler::mangleSourceNameWithAbiTags(
635 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags) {
636 mangleSourceName(ND->getIdentifier());
637 writeAbiTags(ND, AdditionalAbiTags);
640 void CXXNameMangler::mangle(const NamedDecl *D) {
641 // <mangled-name> ::= _Z <encoding>
643 // ::= <special-name>
645 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
646 mangleFunctionEncoding(FD);
647 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
649 else if (const IndirectFieldDecl *IFD = dyn_cast<IndirectFieldDecl>(D))
650 mangleName(IFD->getAnonField());
652 mangleName(cast<FieldDecl>(D));
655 void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
656 // <encoding> ::= <function name> <bare-function-type>
658 // Don't mangle in the type if this isn't a decl we should typically mangle.
659 if (!Context.shouldMangleDeclName(FD)) {
664 AbiTagList ReturnTypeAbiTags = makeFunctionReturnTypeTags(FD);
665 if (ReturnTypeAbiTags.empty()) {
666 // There are no tags for return type, the simplest case.
668 mangleFunctionEncodingBareType(FD);
672 // Mangle function name and encoding to temporary buffer.
673 // We have to output name and encoding to the same mangler to get the same
674 // substitution as it will be in final mangling.
675 SmallString<256> FunctionEncodingBuf;
676 llvm::raw_svector_ostream FunctionEncodingStream(FunctionEncodingBuf);
677 CXXNameMangler FunctionEncodingMangler(*this, FunctionEncodingStream);
678 // Output name of the function.
679 FunctionEncodingMangler.disableDerivedAbiTags();
680 FunctionEncodingMangler.mangleNameWithAbiTags(FD, nullptr);
682 // Remember length of the function name in the buffer.
683 size_t EncodingPositionStart = FunctionEncodingStream.str().size();
684 FunctionEncodingMangler.mangleFunctionEncodingBareType(FD);
686 // Get tags from return type that are not present in function name or
688 const AbiTagList &UsedAbiTags =
689 FunctionEncodingMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
690 AbiTagList AdditionalAbiTags(ReturnTypeAbiTags.size());
691 AdditionalAbiTags.erase(
692 std::set_difference(ReturnTypeAbiTags.begin(), ReturnTypeAbiTags.end(),
693 UsedAbiTags.begin(), UsedAbiTags.end(),
694 AdditionalAbiTags.begin()),
695 AdditionalAbiTags.end());
697 // Output name with implicit tags and function encoding from temporary buffer.
698 mangleNameWithAbiTags(FD, &AdditionalAbiTags);
699 Out << FunctionEncodingStream.str().substr(EncodingPositionStart);
701 // Function encoding could create new substitutions so we have to add
702 // temp mangled substitutions to main mangler.
703 extendSubstitutions(&FunctionEncodingMangler);
706 void CXXNameMangler::mangleFunctionEncodingBareType(const FunctionDecl *FD) {
707 if (FD->hasAttr<EnableIfAttr>()) {
708 FunctionTypeDepthState Saved = FunctionTypeDepth.push();
709 Out << "Ua9enable_ifI";
710 // FIXME: specific_attr_iterator iterates in reverse order. Fix that and use
712 for (AttrVec::const_reverse_iterator I = FD->getAttrs().rbegin(),
713 E = FD->getAttrs().rend();
715 EnableIfAttr *EIA = dyn_cast<EnableIfAttr>(*I);
719 mangleExpression(EIA->getCond());
723 FunctionTypeDepth.pop(Saved);
726 // When mangling an inheriting constructor, the bare function type used is
727 // that of the inherited constructor.
728 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
729 if (auto Inherited = CD->getInheritedConstructor())
730 FD = Inherited.getConstructor();
732 // Whether the mangling of a function type includes the return type depends on
733 // the context and the nature of the function. The rules for deciding whether
734 // the return type is included are:
736 // 1. Template functions (names or types) have return types encoded, with
737 // the exceptions listed below.
738 // 2. Function types not appearing as part of a function name mangling,
739 // e.g. parameters, pointer types, etc., have return type encoded, with the
740 // exceptions listed below.
741 // 3. Non-template function names do not have return types encoded.
743 // The exceptions mentioned in (1) and (2) above, for which the return type is
744 // never included, are
747 // 3. Conversion operator functions, e.g. operator int.
748 bool MangleReturnType = false;
749 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) {
750 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) ||
751 isa<CXXConversionDecl>(FD)))
752 MangleReturnType = true;
754 // Mangle the type of the primary template.
755 FD = PrimaryTemplate->getTemplatedDecl();
758 mangleBareFunctionType(FD->getType()->castAs<FunctionProtoType>(),
759 MangleReturnType, FD);
762 static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) {
763 while (isa<LinkageSpecDecl>(DC)) {
764 DC = getEffectiveParentContext(DC);
770 /// Return whether a given namespace is the 'std' namespace.
771 static bool isStd(const NamespaceDecl *NS) {
772 if (!IgnoreLinkageSpecDecls(getEffectiveParentContext(NS))
773 ->isTranslationUnit())
776 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier();
777 return II && II->isStr("std");
780 // isStdNamespace - Return whether a given decl context is a toplevel 'std'
782 static bool isStdNamespace(const DeclContext *DC) {
783 if (!DC->isNamespace())
786 return isStd(cast<NamespaceDecl>(DC));
789 static const TemplateDecl *
790 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
791 // Check if we have a function template.
792 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
793 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
794 TemplateArgs = FD->getTemplateSpecializationArgs();
799 // Check if we have a class template.
800 if (const ClassTemplateSpecializationDecl *Spec =
801 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
802 TemplateArgs = &Spec->getTemplateArgs();
803 return Spec->getSpecializedTemplate();
806 // Check if we have a variable template.
807 if (const VarTemplateSpecializationDecl *Spec =
808 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
809 TemplateArgs = &Spec->getTemplateArgs();
810 return Spec->getSpecializedTemplate();
816 void CXXNameMangler::mangleName(const NamedDecl *ND) {
817 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
818 // Variables should have implicit tags from its type.
819 AbiTagList VariableTypeAbiTags = makeVariableTypeTags(VD);
820 if (VariableTypeAbiTags.empty()) {
821 // Simple case no variable type tags.
822 mangleNameWithAbiTags(VD, nullptr);
826 // Mangle variable name to null stream to collect tags.
827 llvm::raw_null_ostream NullOutStream;
828 CXXNameMangler VariableNameMangler(*this, NullOutStream);
829 VariableNameMangler.disableDerivedAbiTags();
830 VariableNameMangler.mangleNameWithAbiTags(VD, nullptr);
832 // Get tags from variable type that are not present in its name.
833 const AbiTagList &UsedAbiTags =
834 VariableNameMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
835 AbiTagList AdditionalAbiTags(VariableTypeAbiTags.size());
836 AdditionalAbiTags.erase(
837 std::set_difference(VariableTypeAbiTags.begin(),
838 VariableTypeAbiTags.end(), UsedAbiTags.begin(),
839 UsedAbiTags.end(), AdditionalAbiTags.begin()),
840 AdditionalAbiTags.end());
842 // Output name with implicit tags.
843 mangleNameWithAbiTags(VD, &AdditionalAbiTags);
845 mangleNameWithAbiTags(ND, nullptr);
849 void CXXNameMangler::mangleNameWithAbiTags(const NamedDecl *ND,
850 const AbiTagList *AdditionalAbiTags) {
851 // <name> ::= [<module-name>] <nested-name>
852 // ::= [<module-name>] <unscoped-name>
853 // ::= [<module-name>] <unscoped-template-name> <template-args>
856 const DeclContext *DC = getEffectiveDeclContext(ND);
858 // If this is an extern variable declared locally, the relevant DeclContext
859 // is that of the containing namespace, or the translation unit.
860 // FIXME: This is a hack; extern variables declared locally should have
861 // a proper semantic declaration context!
862 if (isLocalContainerContext(DC) && ND->hasLinkage() && !isLambda(ND))
863 while (!DC->isNamespace() && !DC->isTranslationUnit())
864 DC = getEffectiveParentContext(DC);
865 else if (GetLocalClassDecl(ND)) {
866 mangleLocalName(ND, AdditionalAbiTags);
870 DC = IgnoreLinkageSpecDecls(DC);
872 if (isLocalContainerContext(DC)) {
873 mangleLocalName(ND, AdditionalAbiTags);
877 // Do not mangle the owning module for an external linkage declaration.
878 // This enables backwards-compatibility with non-modular code, and is
879 // a valid choice since conflicts are not permitted by C++ Modules TS
880 // [basic.def.odr]/6.2.
881 if (!ND->hasExternalFormalLinkage())
882 if (Module *M = ND->getOwningModuleForLinkage())
885 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
886 // Check if we have a template.
887 const TemplateArgumentList *TemplateArgs = nullptr;
888 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
889 mangleUnscopedTemplateName(TD, AdditionalAbiTags);
890 mangleTemplateArgs(*TemplateArgs);
894 mangleUnscopedName(ND, AdditionalAbiTags);
898 mangleNestedName(ND, DC, AdditionalAbiTags);
901 void CXXNameMangler::mangleModuleName(const Module *M) {
902 // Implement the C++ Modules TS name mangling proposal; see
903 // https://gcc.gnu.org/wiki/cxx-modules?action=AttachFile
905 // <module-name> ::= W <unscoped-name>+ E
906 // ::= W <module-subst> <unscoped-name>* E
908 mangleModuleNamePrefix(M->Name);
912 void CXXNameMangler::mangleModuleNamePrefix(StringRef Name) {
913 // <module-subst> ::= _ <seq-id> # 0 < seq-id < 10
914 // ::= W <seq-id - 10> _ # otherwise
915 auto It = ModuleSubstitutions.find(Name);
916 if (It != ModuleSubstitutions.end()) {
918 Out << '_' << static_cast<char>('0' + It->second);
920 Out << 'W' << (It->second - 10) << '_';
924 // FIXME: Preserve hierarchy in module names rather than flattening
925 // them to strings; use Module*s as substitution keys.
926 auto Parts = Name.rsplit('.');
927 if (Parts.second.empty())
928 Parts.second = Parts.first;
930 mangleModuleNamePrefix(Parts.first);
932 Out << Parts.second.size() << Parts.second;
933 ModuleSubstitutions.insert({Name, ModuleSubstitutions.size()});
936 void CXXNameMangler::mangleTemplateName(const TemplateDecl *TD,
937 const TemplateArgument *TemplateArgs,
938 unsigned NumTemplateArgs) {
939 const DeclContext *DC = IgnoreLinkageSpecDecls(getEffectiveDeclContext(TD));
941 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
942 mangleUnscopedTemplateName(TD, nullptr);
943 mangleTemplateArgs(TemplateArgs, NumTemplateArgs);
945 mangleNestedName(TD, TemplateArgs, NumTemplateArgs);
949 void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND,
950 const AbiTagList *AdditionalAbiTags) {
951 // <unscoped-name> ::= <unqualified-name>
952 // ::= St <unqualified-name> # ::std::
954 if (isStdNamespace(IgnoreLinkageSpecDecls(getEffectiveDeclContext(ND))))
957 mangleUnqualifiedName(ND, AdditionalAbiTags);
960 void CXXNameMangler::mangleUnscopedTemplateName(
961 const TemplateDecl *ND, const AbiTagList *AdditionalAbiTags) {
962 // <unscoped-template-name> ::= <unscoped-name>
963 // ::= <substitution>
964 if (mangleSubstitution(ND))
967 // <template-template-param> ::= <template-param>
968 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
969 assert(!AdditionalAbiTags &&
970 "template template param cannot have abi tags");
971 mangleTemplateParameter(TTP->getIndex());
972 } else if (isa<BuiltinTemplateDecl>(ND)) {
973 mangleUnscopedName(ND, AdditionalAbiTags);
975 mangleUnscopedName(ND->getTemplatedDecl(), AdditionalAbiTags);
981 void CXXNameMangler::mangleUnscopedTemplateName(
982 TemplateName Template, const AbiTagList *AdditionalAbiTags) {
983 // <unscoped-template-name> ::= <unscoped-name>
984 // ::= <substitution>
985 if (TemplateDecl *TD = Template.getAsTemplateDecl())
986 return mangleUnscopedTemplateName(TD, AdditionalAbiTags);
988 if (mangleSubstitution(Template))
991 assert(!AdditionalAbiTags &&
992 "dependent template name cannot have abi tags");
994 DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
995 assert(Dependent && "Not a dependent template name?");
996 if (const IdentifierInfo *Id = Dependent->getIdentifier())
997 mangleSourceName(Id);
999 mangleOperatorName(Dependent->getOperator(), UnknownArity);
1001 addSubstitution(Template);
1004 void CXXNameMangler::mangleFloat(const llvm::APFloat &f) {
1006 // Floating-point literals are encoded using a fixed-length
1007 // lowercase hexadecimal string corresponding to the internal
1008 // representation (IEEE on Itanium), high-order bytes first,
1009 // without leading zeroes. For example: "Lf bf800000 E" is -1.0f
1011 // The 'without leading zeroes' thing seems to be an editorial
1012 // mistake; see the discussion on cxx-abi-dev beginning on
1015 // Our requirements here are just barely weird enough to justify
1016 // using a custom algorithm instead of post-processing APInt::toString().
1018 llvm::APInt valueBits = f.bitcastToAPInt();
1019 unsigned numCharacters = (valueBits.getBitWidth() + 3) / 4;
1020 assert(numCharacters != 0);
1022 // Allocate a buffer of the right number of characters.
1023 SmallVector<char, 20> buffer(numCharacters);
1025 // Fill the buffer left-to-right.
1026 for (unsigned stringIndex = 0; stringIndex != numCharacters; ++stringIndex) {
1027 // The bit-index of the next hex digit.
1028 unsigned digitBitIndex = 4 * (numCharacters - stringIndex - 1);
1030 // Project out 4 bits starting at 'digitIndex'.
1031 uint64_t hexDigit = valueBits.getRawData()[digitBitIndex / 64];
1032 hexDigit >>= (digitBitIndex % 64);
1035 // Map that over to a lowercase hex digit.
1036 static const char charForHex[16] = {
1037 '0', '1', '2', '3', '4', '5', '6', '7',
1038 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
1040 buffer[stringIndex] = charForHex[hexDigit];
1043 Out.write(buffer.data(), numCharacters);
1046 void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) {
1047 if (Value.isSigned() && Value.isNegative()) {
1049 Value.abs().print(Out, /*signed*/ false);
1051 Value.print(Out, /*signed*/ false);
1055 void CXXNameMangler::mangleNumber(int64_t Number) {
1056 // <number> ::= [n] <non-negative decimal integer>
1065 void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) {
1066 // <call-offset> ::= h <nv-offset> _
1067 // ::= v <v-offset> _
1068 // <nv-offset> ::= <offset number> # non-virtual base override
1069 // <v-offset> ::= <offset number> _ <virtual offset number>
1070 // # virtual base override, with vcall offset
1073 mangleNumber(NonVirtual);
1079 mangleNumber(NonVirtual);
1081 mangleNumber(Virtual);
1085 void CXXNameMangler::manglePrefix(QualType type) {
1086 if (const auto *TST = type->getAs<TemplateSpecializationType>()) {
1087 if (!mangleSubstitution(QualType(TST, 0))) {
1088 mangleTemplatePrefix(TST->getTemplateName());
1090 // FIXME: GCC does not appear to mangle the template arguments when
1091 // the template in question is a dependent template name. Should we
1092 // emulate that badness?
1093 mangleTemplateArgs(TST->getArgs(), TST->getNumArgs());
1094 addSubstitution(QualType(TST, 0));
1096 } else if (const auto *DTST =
1097 type->getAs<DependentTemplateSpecializationType>()) {
1098 if (!mangleSubstitution(QualType(DTST, 0))) {
1099 TemplateName Template = getASTContext().getDependentTemplateName(
1100 DTST->getQualifier(), DTST->getIdentifier());
1101 mangleTemplatePrefix(Template);
1103 // FIXME: GCC does not appear to mangle the template arguments when
1104 // the template in question is a dependent template name. Should we
1105 // emulate that badness?
1106 mangleTemplateArgs(DTST->getArgs(), DTST->getNumArgs());
1107 addSubstitution(QualType(DTST, 0));
1110 // We use the QualType mangle type variant here because it handles
1116 /// Mangle everything prior to the base-unresolved-name in an unresolved-name.
1118 /// \param recursive - true if this is being called recursively,
1119 /// i.e. if there is more prefix "to the right".
1120 void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
1124 // <unresolved-name> ::= [gs] <base-unresolved-name>
1126 // T::x / decltype(p)::x
1127 // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name>
1129 // T::N::x /decltype(p)::N::x
1130 // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
1131 // <base-unresolved-name>
1133 // A::x, N::y, A<T>::z; "gs" means leading "::"
1134 // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E
1135 // <base-unresolved-name>
1137 switch (qualifier->getKind()) {
1138 case NestedNameSpecifier::Global:
1141 // We want an 'sr' unless this is the entire NNS.
1145 // We never want an 'E' here.
1148 case NestedNameSpecifier::Super:
1149 llvm_unreachable("Can't mangle __super specifier");
1151 case NestedNameSpecifier::Namespace:
1152 if (qualifier->getPrefix())
1153 mangleUnresolvedPrefix(qualifier->getPrefix(),
1154 /*recursive*/ true);
1157 mangleSourceNameWithAbiTags(qualifier->getAsNamespace());
1159 case NestedNameSpecifier::NamespaceAlias:
1160 if (qualifier->getPrefix())
1161 mangleUnresolvedPrefix(qualifier->getPrefix(),
1162 /*recursive*/ true);
1165 mangleSourceNameWithAbiTags(qualifier->getAsNamespaceAlias());
1168 case NestedNameSpecifier::TypeSpec:
1169 case NestedNameSpecifier::TypeSpecWithTemplate: {
1170 const Type *type = qualifier->getAsType();
1172 // We only want to use an unresolved-type encoding if this is one of:
1174 // - a template type parameter
1175 // - a template template parameter with arguments
1176 // In all of these cases, we should have no prefix.
1177 if (qualifier->getPrefix()) {
1178 mangleUnresolvedPrefix(qualifier->getPrefix(),
1179 /*recursive*/ true);
1181 // Otherwise, all the cases want this.
1185 if (mangleUnresolvedTypeOrSimpleId(QualType(type, 0), recursive ? "N" : ""))
1191 case NestedNameSpecifier::Identifier:
1192 // Member expressions can have these without prefixes.
1193 if (qualifier->getPrefix())
1194 mangleUnresolvedPrefix(qualifier->getPrefix(),
1195 /*recursive*/ true);
1199 mangleSourceName(qualifier->getAsIdentifier());
1200 // An Identifier has no type information, so we can't emit abi tags for it.
1204 // If this was the innermost part of the NNS, and we fell out to
1205 // here, append an 'E'.
1210 /// Mangle an unresolved-name, which is generally used for names which
1211 /// weren't resolved to specific entities.
1212 void CXXNameMangler::mangleUnresolvedName(
1213 NestedNameSpecifier *qualifier, DeclarationName name,
1214 const TemplateArgumentLoc *TemplateArgs, unsigned NumTemplateArgs,
1215 unsigned knownArity) {
1216 if (qualifier) mangleUnresolvedPrefix(qualifier);
1217 switch (name.getNameKind()) {
1218 // <base-unresolved-name> ::= <simple-id>
1219 case DeclarationName::Identifier:
1220 mangleSourceName(name.getAsIdentifierInfo());
1222 // <base-unresolved-name> ::= dn <destructor-name>
1223 case DeclarationName::CXXDestructorName:
1225 mangleUnresolvedTypeOrSimpleId(name.getCXXNameType());
1227 // <base-unresolved-name> ::= on <operator-name>
1228 case DeclarationName::CXXConversionFunctionName:
1229 case DeclarationName::CXXLiteralOperatorName:
1230 case DeclarationName::CXXOperatorName:
1232 mangleOperatorName(name, knownArity);
1234 case DeclarationName::CXXConstructorName:
1235 llvm_unreachable("Can't mangle a constructor name!");
1236 case DeclarationName::CXXUsingDirective:
1237 llvm_unreachable("Can't mangle a using directive name!");
1238 case DeclarationName::CXXDeductionGuideName:
1239 llvm_unreachable("Can't mangle a deduction guide name!");
1240 case DeclarationName::ObjCMultiArgSelector:
1241 case DeclarationName::ObjCOneArgSelector:
1242 case DeclarationName::ObjCZeroArgSelector:
1243 llvm_unreachable("Can't mangle Objective-C selector names here!");
1246 // The <simple-id> and on <operator-name> productions end in an optional
1249 mangleTemplateArgs(TemplateArgs, NumTemplateArgs);
1252 void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
1253 DeclarationName Name,
1254 unsigned KnownArity,
1255 const AbiTagList *AdditionalAbiTags) {
1256 unsigned Arity = KnownArity;
1257 // <unqualified-name> ::= <operator-name>
1258 // ::= <ctor-dtor-name>
1259 // ::= <source-name>
1260 switch (Name.getNameKind()) {
1261 case DeclarationName::Identifier: {
1262 const IdentifierInfo *II = Name.getAsIdentifierInfo();
1264 // We mangle decomposition declarations as the names of their bindings.
1265 if (auto *DD = dyn_cast<DecompositionDecl>(ND)) {
1266 // FIXME: Non-standard mangling for decomposition declarations:
1268 // <unqualified-name> ::= DC <source-name>* E
1270 // These can never be referenced across translation units, so we do
1271 // not need a cross-vendor mangling for anything other than demanglers.
1272 // Proposed on cxx-abi-dev on 2016-08-12
1274 for (auto *BD : DD->bindings())
1275 mangleSourceName(BD->getDeclName().getAsIdentifierInfo());
1277 writeAbiTags(ND, AdditionalAbiTags);
1282 // Match GCC's naming convention for internal linkage symbols, for
1283 // symbols that are not actually visible outside of this TU. GCC
1284 // distinguishes between internal and external linkage symbols in
1285 // its mangling, to support cases like this that were valid C++ prior
1288 // void test() { extern void foo(); }
1289 // static void foo();
1291 // Don't bother with the L marker for names in anonymous namespaces; the
1292 // 12_GLOBAL__N_1 mangling is quite sufficient there, and this better
1293 // matches GCC anyway, because GCC does not treat anonymous namespaces as
1294 // implying internal linkage.
1295 if (ND && ND->getFormalLinkage() == InternalLinkage &&
1296 !ND->isExternallyVisible() &&
1297 getEffectiveDeclContext(ND)->isFileContext() &&
1298 !ND->isInAnonymousNamespace())
1301 auto *FD = dyn_cast<FunctionDecl>(ND);
1302 bool IsRegCall = FD &&
1303 FD->getType()->castAs<FunctionType>()->getCallConv() ==
1304 clang::CC_X86RegCall;
1306 mangleRegCallName(II);
1308 mangleSourceName(II);
1310 writeAbiTags(ND, AdditionalAbiTags);
1314 // Otherwise, an anonymous entity. We must have a declaration.
1315 assert(ND && "mangling empty name without declaration");
1317 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
1318 if (NS->isAnonymousNamespace()) {
1319 // This is how gcc mangles these names.
1320 Out << "12_GLOBAL__N_1";
1325 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
1326 // We must have an anonymous union or struct declaration.
1327 const RecordDecl *RD =
1328 cast<RecordDecl>(VD->getType()->getAs<RecordType>()->getDecl());
1330 // Itanium C++ ABI 5.1.2:
1332 // For the purposes of mangling, the name of an anonymous union is
1333 // considered to be the name of the first named data member found by a
1334 // pre-order, depth-first, declaration-order walk of the data members of
1335 // the anonymous union. If there is no such data member (i.e., if all of
1336 // the data members in the union are unnamed), then there is no way for
1337 // a program to refer to the anonymous union, and there is therefore no
1338 // need to mangle its name.
1339 assert(RD->isAnonymousStructOrUnion()
1340 && "Expected anonymous struct or union!");
1341 const FieldDecl *FD = RD->findFirstNamedDataMember();
1343 // It's actually possible for various reasons for us to get here
1344 // with an empty anonymous struct / union. Fortunately, it
1345 // doesn't really matter what name we generate.
1347 assert(FD->getIdentifier() && "Data member name isn't an identifier!");
1349 mangleSourceName(FD->getIdentifier());
1350 // Not emitting abi tags: internal name anyway.
1354 // Class extensions have no name as a category, and it's possible
1355 // for them to be the semantic parent of certain declarations
1356 // (primarily, tag decls defined within declarations). Such
1357 // declarations will always have internal linkage, so the name
1358 // doesn't really matter, but we shouldn't crash on them. For
1359 // safety, just handle all ObjC containers here.
1360 if (isa<ObjCContainerDecl>(ND))
1363 // We must have an anonymous struct.
1364 const TagDecl *TD = cast<TagDecl>(ND);
1365 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
1366 assert(TD->getDeclContext() == D->getDeclContext() &&
1367 "Typedef should not be in another decl context!");
1368 assert(D->getDeclName().getAsIdentifierInfo() &&
1369 "Typedef was not named!");
1370 mangleSourceName(D->getDeclName().getAsIdentifierInfo());
1371 assert(!AdditionalAbiTags && "Type cannot have additional abi tags");
1372 // Explicit abi tags are still possible; take from underlying type, not
1374 writeAbiTags(TD, nullptr);
1378 // <unnamed-type-name> ::= <closure-type-name>
1380 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
1381 // <lambda-sig> ::= <parameter-type>+ # Parameter types or 'v' for 'void'.
1382 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
1383 if (Record->isLambda() && Record->getLambdaManglingNumber()) {
1384 assert(!AdditionalAbiTags &&
1385 "Lambda type cannot have additional abi tags");
1386 mangleLambda(Record);
1391 if (TD->isExternallyVisible()) {
1392 unsigned UnnamedMangle = getASTContext().getManglingNumber(TD);
1394 if (UnnamedMangle > 1)
1395 Out << UnnamedMangle - 2;
1397 writeAbiTags(TD, AdditionalAbiTags);
1401 // Get a unique id for the anonymous struct. If it is not a real output
1402 // ID doesn't matter so use fake one.
1403 unsigned AnonStructId = NullOut ? 0 : Context.getAnonymousStructId(TD);
1405 // Mangle it as a source name in the form
1407 // where n is the length of the string.
1410 Str += llvm::utostr(AnonStructId);
1417 case DeclarationName::ObjCZeroArgSelector:
1418 case DeclarationName::ObjCOneArgSelector:
1419 case DeclarationName::ObjCMultiArgSelector:
1420 llvm_unreachable("Can't mangle Objective-C selector names here!");
1422 case DeclarationName::CXXConstructorName: {
1423 const CXXRecordDecl *InheritedFrom = nullptr;
1424 const TemplateArgumentList *InheritedTemplateArgs = nullptr;
1425 if (auto Inherited =
1426 cast<CXXConstructorDecl>(ND)->getInheritedConstructor()) {
1427 InheritedFrom = Inherited.getConstructor()->getParent();
1428 InheritedTemplateArgs =
1429 Inherited.getConstructor()->getTemplateSpecializationArgs();
1433 // If the named decl is the C++ constructor we're mangling, use the type
1435 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType), InheritedFrom);
1437 // Otherwise, use the complete constructor name. This is relevant if a
1438 // class with a constructor is declared within a constructor.
1439 mangleCXXCtorType(Ctor_Complete, InheritedFrom);
1441 // FIXME: The template arguments are part of the enclosing prefix or
1442 // nested-name, but it's more convenient to mangle them here.
1443 if (InheritedTemplateArgs)
1444 mangleTemplateArgs(*InheritedTemplateArgs);
1446 writeAbiTags(ND, AdditionalAbiTags);
1450 case DeclarationName::CXXDestructorName:
1452 // If the named decl is the C++ destructor we're mangling, use the type we
1454 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
1456 // Otherwise, use the complete destructor name. This is relevant if a
1457 // class with a destructor is declared within a destructor.
1458 mangleCXXDtorType(Dtor_Complete);
1459 writeAbiTags(ND, AdditionalAbiTags);
1462 case DeclarationName::CXXOperatorName:
1463 if (ND && Arity == UnknownArity) {
1464 Arity = cast<FunctionDecl>(ND)->getNumParams();
1466 // If we have a member function, we need to include the 'this' pointer.
1467 if (const auto *MD = dyn_cast<CXXMethodDecl>(ND))
1468 if (!MD->isStatic())
1472 case DeclarationName::CXXConversionFunctionName:
1473 case DeclarationName::CXXLiteralOperatorName:
1474 mangleOperatorName(Name, Arity);
1475 writeAbiTags(ND, AdditionalAbiTags);
1478 case DeclarationName::CXXDeductionGuideName:
1479 llvm_unreachable("Can't mangle a deduction guide name!");
1481 case DeclarationName::CXXUsingDirective:
1482 llvm_unreachable("Can't mangle a using directive name!");
1486 void CXXNameMangler::mangleRegCallName(const IdentifierInfo *II) {
1487 // <source-name> ::= <positive length number> __regcall3__ <identifier>
1488 // <number> ::= [n] <non-negative decimal integer>
1489 // <identifier> ::= <unqualified source code identifier>
1490 Out << II->getLength() + sizeof("__regcall3__") - 1 << "__regcall3__"
1494 void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) {
1495 // <source-name> ::= <positive length number> <identifier>
1496 // <number> ::= [n] <non-negative decimal integer>
1497 // <identifier> ::= <unqualified source code identifier>
1498 Out << II->getLength() << II->getName();
1501 void CXXNameMangler::mangleNestedName(const NamedDecl *ND,
1502 const DeclContext *DC,
1503 const AbiTagList *AdditionalAbiTags,
1506 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
1507 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
1508 // <template-args> E
1511 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) {
1512 Qualifiers MethodQuals =
1513 Qualifiers::fromCVRUMask(Method->getTypeQualifiers());
1514 // We do not consider restrict a distinguishing attribute for overloading
1515 // purposes so we must not mangle it.
1516 MethodQuals.removeRestrict();
1517 mangleQualifiers(MethodQuals);
1518 mangleRefQualifier(Method->getRefQualifier());
1521 // Check if we have a template.
1522 const TemplateArgumentList *TemplateArgs = nullptr;
1523 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
1524 mangleTemplatePrefix(TD, NoFunction);
1525 mangleTemplateArgs(*TemplateArgs);
1528 manglePrefix(DC, NoFunction);
1529 mangleUnqualifiedName(ND, AdditionalAbiTags);
1534 void CXXNameMangler::mangleNestedName(const TemplateDecl *TD,
1535 const TemplateArgument *TemplateArgs,
1536 unsigned NumTemplateArgs) {
1537 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
1541 mangleTemplatePrefix(TD);
1542 mangleTemplateArgs(TemplateArgs, NumTemplateArgs);
1547 void CXXNameMangler::mangleLocalName(const Decl *D,
1548 const AbiTagList *AdditionalAbiTags) {
1549 // <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1550 // := Z <function encoding> E s [<discriminator>]
1551 // <local-name> := Z <function encoding> E d [ <parameter number> ]
1553 // <discriminator> := _ <non-negative number>
1554 assert(isa<NamedDecl>(D) || isa<BlockDecl>(D));
1555 const RecordDecl *RD = GetLocalClassDecl(D);
1556 const DeclContext *DC = getEffectiveDeclContext(RD ? RD : D);
1561 AbiTagState LocalAbiTags(AbiTags);
1563 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC))
1564 mangleObjCMethodName(MD);
1565 else if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC))
1566 mangleBlockForPrefix(BD);
1568 mangleFunctionEncoding(cast<FunctionDecl>(DC));
1570 // Implicit ABI tags (from namespace) are not available in the following
1571 // entity; reset to actually emitted tags, which are available.
1572 LocalAbiTags.setUsedAbiTags(LocalAbiTags.getEmittedAbiTags());
1577 // GCC 5.3.0 doesn't emit derived ABI tags for local names but that seems to
1578 // be a bug that is fixed in trunk.
1581 // The parameter number is omitted for the last parameter, 0 for the
1582 // second-to-last parameter, 1 for the third-to-last parameter, etc. The
1583 // <entity name> will of course contain a <closure-type-name>: Its
1584 // numbering will be local to the particular argument in which it appears
1585 // -- other default arguments do not affect its encoding.
1586 const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD);
1587 if (CXXRD && CXXRD->isLambda()) {
1588 if (const ParmVarDecl *Parm
1589 = dyn_cast_or_null<ParmVarDecl>(CXXRD->getLambdaContextDecl())) {
1590 if (const FunctionDecl *Func
1591 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1593 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1595 mangleNumber(Num - 2);
1601 // Mangle the name relative to the closest enclosing function.
1602 // equality ok because RD derived from ND above
1604 mangleUnqualifiedName(RD, AdditionalAbiTags);
1605 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1606 manglePrefix(getEffectiveDeclContext(BD), true /*NoFunction*/);
1607 assert(!AdditionalAbiTags && "Block cannot have additional abi tags");
1608 mangleUnqualifiedBlock(BD);
1610 const NamedDecl *ND = cast<NamedDecl>(D);
1611 mangleNestedName(ND, getEffectiveDeclContext(ND), AdditionalAbiTags,
1612 true /*NoFunction*/);
1614 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1615 // Mangle a block in a default parameter; see above explanation for
1617 if (const ParmVarDecl *Parm
1618 = dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl())) {
1619 if (const FunctionDecl *Func
1620 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1622 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1624 mangleNumber(Num - 2);
1629 assert(!AdditionalAbiTags && "Block cannot have additional abi tags");
1630 mangleUnqualifiedBlock(BD);
1632 mangleUnqualifiedName(cast<NamedDecl>(D), AdditionalAbiTags);
1635 if (const NamedDecl *ND = dyn_cast<NamedDecl>(RD ? RD : D)) {
1637 if (Context.getNextDiscriminator(ND, disc)) {
1641 Out << "__" << disc << '_';
1646 void CXXNameMangler::mangleBlockForPrefix(const BlockDecl *Block) {
1647 if (GetLocalClassDecl(Block)) {
1648 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1651 const DeclContext *DC = getEffectiveDeclContext(Block);
1652 if (isLocalContainerContext(DC)) {
1653 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1656 manglePrefix(getEffectiveDeclContext(Block));
1657 mangleUnqualifiedBlock(Block);
1660 void CXXNameMangler::mangleUnqualifiedBlock(const BlockDecl *Block) {
1661 if (Decl *Context = Block->getBlockManglingContextDecl()) {
1662 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1663 Context->getDeclContext()->isRecord()) {
1664 const auto *ND = cast<NamedDecl>(Context);
1665 if (ND->getIdentifier()) {
1666 mangleSourceNameWithAbiTags(ND);
1672 // If we have a block mangling number, use it.
1673 unsigned Number = Block->getBlockManglingNumber();
1674 // Otherwise, just make up a number. It doesn't matter what it is because
1675 // the symbol in question isn't externally visible.
1677 Number = Context.getBlockId(Block, false);
1679 // Stored mangling numbers are 1-based.
1688 void CXXNameMangler::mangleLambda(const CXXRecordDecl *Lambda) {
1689 // If the context of a closure type is an initializer for a class member
1690 // (static or nonstatic), it is encoded in a qualified name with a final
1691 // <prefix> of the form:
1693 // <data-member-prefix> := <member source-name> M
1695 // Technically, the data-member-prefix is part of the <prefix>. However,
1696 // since a closure type will always be mangled with a prefix, it's easier
1697 // to emit that last part of the prefix here.
1698 if (Decl *Context = Lambda->getLambdaContextDecl()) {
1699 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1700 !isa<ParmVarDecl>(Context)) {
1701 // FIXME: 'inline auto [a, b] = []{ return ... };' does not get a
1702 // reasonable mangling here.
1703 if (const IdentifierInfo *Name
1704 = cast<NamedDecl>(Context)->getIdentifier()) {
1705 mangleSourceName(Name);
1706 const TemplateArgumentList *TemplateArgs = nullptr;
1707 if (isTemplate(cast<NamedDecl>(Context), TemplateArgs))
1708 mangleTemplateArgs(*TemplateArgs);
1715 const FunctionProtoType *Proto = Lambda->getLambdaTypeInfo()->getType()->
1716 getAs<FunctionProtoType>();
1717 mangleBareFunctionType(Proto, /*MangleReturnType=*/false,
1718 Lambda->getLambdaStaticInvoker());
1721 // The number is omitted for the first closure type with a given
1722 // <lambda-sig> in a given context; it is n-2 for the nth closure type
1723 // (in lexical order) with that same <lambda-sig> and context.
1725 // The AST keeps track of the number for us.
1726 unsigned Number = Lambda->getLambdaManglingNumber();
1727 assert(Number > 0 && "Lambda should be mangled as an unnamed class");
1729 mangleNumber(Number - 2);
1733 void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) {
1734 switch (qualifier->getKind()) {
1735 case NestedNameSpecifier::Global:
1739 case NestedNameSpecifier::Super:
1740 llvm_unreachable("Can't mangle __super specifier");
1742 case NestedNameSpecifier::Namespace:
1743 mangleName(qualifier->getAsNamespace());
1746 case NestedNameSpecifier::NamespaceAlias:
1747 mangleName(qualifier->getAsNamespaceAlias()->getNamespace());
1750 case NestedNameSpecifier::TypeSpec:
1751 case NestedNameSpecifier::TypeSpecWithTemplate:
1752 manglePrefix(QualType(qualifier->getAsType(), 0));
1755 case NestedNameSpecifier::Identifier:
1756 // Member expressions can have these without prefixes, but that
1757 // should end up in mangleUnresolvedPrefix instead.
1758 assert(qualifier->getPrefix());
1759 manglePrefix(qualifier->getPrefix());
1761 mangleSourceName(qualifier->getAsIdentifier());
1765 llvm_unreachable("unexpected nested name specifier");
1768 void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) {
1769 // <prefix> ::= <prefix> <unqualified-name>
1770 // ::= <template-prefix> <template-args>
1771 // ::= <template-param>
1773 // ::= <substitution>
1775 DC = IgnoreLinkageSpecDecls(DC);
1777 if (DC->isTranslationUnit())
1780 if (NoFunction && isLocalContainerContext(DC))
1783 assert(!isLocalContainerContext(DC));
1785 const NamedDecl *ND = cast<NamedDecl>(DC);
1786 if (mangleSubstitution(ND))
1789 // Check if we have a template.
1790 const TemplateArgumentList *TemplateArgs = nullptr;
1791 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
1792 mangleTemplatePrefix(TD);
1793 mangleTemplateArgs(*TemplateArgs);
1795 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
1796 mangleUnqualifiedName(ND, nullptr);
1799 addSubstitution(ND);
1802 void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) {
1803 // <template-prefix> ::= <prefix> <template unqualified-name>
1804 // ::= <template-param>
1805 // ::= <substitution>
1806 if (TemplateDecl *TD = Template.getAsTemplateDecl())
1807 return mangleTemplatePrefix(TD);
1809 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName())
1810 manglePrefix(Qualified->getQualifier());
1812 if (OverloadedTemplateStorage *Overloaded
1813 = Template.getAsOverloadedTemplate()) {
1814 mangleUnqualifiedName(nullptr, (*Overloaded->begin())->getDeclName(),
1815 UnknownArity, nullptr);
1819 DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
1820 assert(Dependent && "Unknown template name kind?");
1821 if (NestedNameSpecifier *Qualifier = Dependent->getQualifier())
1822 manglePrefix(Qualifier);
1823 mangleUnscopedTemplateName(Template, /* AdditionalAbiTags */ nullptr);
1826 void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND,
1828 // <template-prefix> ::= <prefix> <template unqualified-name>
1829 // ::= <template-param>
1830 // ::= <substitution>
1831 // <template-template-param> ::= <template-param>
1834 if (mangleSubstitution(ND))
1837 // <template-template-param> ::= <template-param>
1838 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
1839 mangleTemplateParameter(TTP->getIndex());
1841 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
1842 if (isa<BuiltinTemplateDecl>(ND))
1843 mangleUnqualifiedName(ND, nullptr);
1845 mangleUnqualifiedName(ND->getTemplatedDecl(), nullptr);
1848 addSubstitution(ND);
1851 /// Mangles a template name under the production <type>. Required for
1852 /// template template arguments.
1853 /// <type> ::= <class-enum-type>
1854 /// ::= <template-param>
1855 /// ::= <substitution>
1856 void CXXNameMangler::mangleType(TemplateName TN) {
1857 if (mangleSubstitution(TN))
1860 TemplateDecl *TD = nullptr;
1862 switch (TN.getKind()) {
1863 case TemplateName::QualifiedTemplate:
1864 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl();
1867 case TemplateName::Template:
1868 TD = TN.getAsTemplateDecl();
1872 if (isa<TemplateTemplateParmDecl>(TD))
1873 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex());
1878 case TemplateName::OverloadedTemplate:
1879 llvm_unreachable("can't mangle an overloaded template name as a <type>");
1881 case TemplateName::DependentTemplate: {
1882 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName();
1883 assert(Dependent->isIdentifier());
1885 // <class-enum-type> ::= <name>
1886 // <name> ::= <nested-name>
1887 mangleUnresolvedPrefix(Dependent->getQualifier());
1888 mangleSourceName(Dependent->getIdentifier());
1892 case TemplateName::SubstTemplateTemplateParm: {
1893 // Substituted template parameters are mangled as the substituted
1894 // template. This will check for the substitution twice, which is
1895 // fine, but we have to return early so that we don't try to *add*
1896 // the substitution twice.
1897 SubstTemplateTemplateParmStorage *subst
1898 = TN.getAsSubstTemplateTemplateParm();
1899 mangleType(subst->getReplacement());
1903 case TemplateName::SubstTemplateTemplateParmPack: {
1904 // FIXME: not clear how to mangle this!
1905 // template <template <class> class T...> class A {
1906 // template <template <class> class U...> void foo(B<T,U> x...);
1908 Out << "_SUBSTPACK_";
1913 addSubstitution(TN);
1916 bool CXXNameMangler::mangleUnresolvedTypeOrSimpleId(QualType Ty,
1918 // Only certain other types are valid as prefixes; enumerate them.
1919 switch (Ty->getTypeClass()) {
1922 case Type::Adjusted:
1925 case Type::BlockPointer:
1926 case Type::LValueReference:
1927 case Type::RValueReference:
1928 case Type::MemberPointer:
1929 case Type::ConstantArray:
1930 case Type::IncompleteArray:
1931 case Type::VariableArray:
1932 case Type::DependentSizedArray:
1933 case Type::DependentAddressSpace:
1934 case Type::DependentSizedExtVector:
1936 case Type::ExtVector:
1937 case Type::FunctionProto:
1938 case Type::FunctionNoProto:
1940 case Type::Attributed:
1942 case Type::DeducedTemplateSpecialization:
1943 case Type::PackExpansion:
1944 case Type::ObjCObject:
1945 case Type::ObjCInterface:
1946 case Type::ObjCObjectPointer:
1947 case Type::ObjCTypeParam:
1950 llvm_unreachable("type is illegal as a nested name specifier");
1952 case Type::SubstTemplateTypeParmPack:
1953 // FIXME: not clear how to mangle this!
1954 // template <class T...> class A {
1955 // template <class U...> void foo(decltype(T::foo(U())) x...);
1957 Out << "_SUBSTPACK_";
1960 // <unresolved-type> ::= <template-param>
1962 // ::= <template-template-param> <template-args>
1963 // (this last is not official yet)
1964 case Type::TypeOfExpr:
1966 case Type::Decltype:
1967 case Type::TemplateTypeParm:
1968 case Type::UnaryTransform:
1969 case Type::SubstTemplateTypeParm:
1971 // Some callers want a prefix before the mangled type.
1974 // This seems to do everything we want. It's not really
1975 // sanctioned for a substituted template parameter, though.
1978 // We never want to print 'E' directly after an unresolved-type,
1979 // so we return directly.
1983 mangleSourceNameWithAbiTags(cast<TypedefType>(Ty)->getDecl());
1986 case Type::UnresolvedUsing:
1987 mangleSourceNameWithAbiTags(
1988 cast<UnresolvedUsingType>(Ty)->getDecl());
1993 mangleSourceNameWithAbiTags(cast<TagType>(Ty)->getDecl());
1996 case Type::TemplateSpecialization: {
1997 const TemplateSpecializationType *TST =
1998 cast<TemplateSpecializationType>(Ty);
1999 TemplateName TN = TST->getTemplateName();
2000 switch (TN.getKind()) {
2001 case TemplateName::Template:
2002 case TemplateName::QualifiedTemplate: {
2003 TemplateDecl *TD = TN.getAsTemplateDecl();
2005 // If the base is a template template parameter, this is an
2007 assert(TD && "no template for template specialization type");
2008 if (isa<TemplateTemplateParmDecl>(TD))
2009 goto unresolvedType;
2011 mangleSourceNameWithAbiTags(TD);
2015 case TemplateName::OverloadedTemplate:
2016 case TemplateName::DependentTemplate:
2017 llvm_unreachable("invalid base for a template specialization type");
2019 case TemplateName::SubstTemplateTemplateParm: {
2020 SubstTemplateTemplateParmStorage *subst =
2021 TN.getAsSubstTemplateTemplateParm();
2022 mangleExistingSubstitution(subst->getReplacement());
2026 case TemplateName::SubstTemplateTemplateParmPack: {
2027 // FIXME: not clear how to mangle this!
2028 // template <template <class U> class T...> class A {
2029 // template <class U...> void foo(decltype(T<U>::foo) x...);
2031 Out << "_SUBSTPACK_";
2036 mangleTemplateArgs(TST->getArgs(), TST->getNumArgs());
2040 case Type::InjectedClassName:
2041 mangleSourceNameWithAbiTags(
2042 cast<InjectedClassNameType>(Ty)->getDecl());
2045 case Type::DependentName:
2046 mangleSourceName(cast<DependentNameType>(Ty)->getIdentifier());
2049 case Type::DependentTemplateSpecialization: {
2050 const DependentTemplateSpecializationType *DTST =
2051 cast<DependentTemplateSpecializationType>(Ty);
2052 mangleSourceName(DTST->getIdentifier());
2053 mangleTemplateArgs(DTST->getArgs(), DTST->getNumArgs());
2057 case Type::Elaborated:
2058 return mangleUnresolvedTypeOrSimpleId(
2059 cast<ElaboratedType>(Ty)->getNamedType(), Prefix);
2065 void CXXNameMangler::mangleOperatorName(DeclarationName Name, unsigned Arity) {
2066 switch (Name.getNameKind()) {
2067 case DeclarationName::CXXConstructorName:
2068 case DeclarationName::CXXDestructorName:
2069 case DeclarationName::CXXDeductionGuideName:
2070 case DeclarationName::CXXUsingDirective:
2071 case DeclarationName::Identifier:
2072 case DeclarationName::ObjCMultiArgSelector:
2073 case DeclarationName::ObjCOneArgSelector:
2074 case DeclarationName::ObjCZeroArgSelector:
2075 llvm_unreachable("Not an operator name");
2077 case DeclarationName::CXXConversionFunctionName:
2078 // <operator-name> ::= cv <type> # (cast)
2080 mangleType(Name.getCXXNameType());
2083 case DeclarationName::CXXLiteralOperatorName:
2085 mangleSourceName(Name.getCXXLiteralIdentifier());
2088 case DeclarationName::CXXOperatorName:
2089 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity);
2095 CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) {
2097 // <operator-name> ::= nw # new
2098 case OO_New: Out << "nw"; break;
2100 case OO_Array_New: Out << "na"; break;
2102 case OO_Delete: Out << "dl"; break;
2103 // ::= da # delete[]
2104 case OO_Array_Delete: Out << "da"; break;
2105 // ::= ps # + (unary)
2106 // ::= pl # + (binary or unknown)
2108 Out << (Arity == 1? "ps" : "pl"); break;
2109 // ::= ng # - (unary)
2110 // ::= mi # - (binary or unknown)
2112 Out << (Arity == 1? "ng" : "mi"); break;
2113 // ::= ad # & (unary)
2114 // ::= an # & (binary or unknown)
2116 Out << (Arity == 1? "ad" : "an"); break;
2117 // ::= de # * (unary)
2118 // ::= ml # * (binary or unknown)
2120 // Use binary when unknown.
2121 Out << (Arity == 1? "de" : "ml"); break;
2123 case OO_Tilde: Out << "co"; break;
2125 case OO_Slash: Out << "dv"; break;
2127 case OO_Percent: Out << "rm"; break;
2129 case OO_Pipe: Out << "or"; break;
2131 case OO_Caret: Out << "eo"; break;
2133 case OO_Equal: Out << "aS"; break;
2135 case OO_PlusEqual: Out << "pL"; break;
2137 case OO_MinusEqual: Out << "mI"; break;
2139 case OO_StarEqual: Out << "mL"; break;
2141 case OO_SlashEqual: Out << "dV"; break;
2143 case OO_PercentEqual: Out << "rM"; break;
2145 case OO_AmpEqual: Out << "aN"; break;
2147 case OO_PipeEqual: Out << "oR"; break;
2149 case OO_CaretEqual: Out << "eO"; break;
2151 case OO_LessLess: Out << "ls"; break;
2153 case OO_GreaterGreater: Out << "rs"; break;
2155 case OO_LessLessEqual: Out << "lS"; break;
2157 case OO_GreaterGreaterEqual: Out << "rS"; break;
2159 case OO_EqualEqual: Out << "eq"; break;
2161 case OO_ExclaimEqual: Out << "ne"; break;
2163 case OO_Less: Out << "lt"; break;
2165 case OO_Greater: Out << "gt"; break;
2167 case OO_LessEqual: Out << "le"; break;
2169 case OO_GreaterEqual: Out << "ge"; break;
2171 case OO_Exclaim: Out << "nt"; break;
2173 case OO_AmpAmp: Out << "aa"; break;
2175 case OO_PipePipe: Out << "oo"; break;
2177 case OO_PlusPlus: Out << "pp"; break;
2179 case OO_MinusMinus: Out << "mm"; break;
2181 case OO_Comma: Out << "cm"; break;
2183 case OO_ArrowStar: Out << "pm"; break;
2185 case OO_Arrow: Out << "pt"; break;
2187 case OO_Call: Out << "cl"; break;
2189 case OO_Subscript: Out << "ix"; break;
2192 // The conditional operator can't be overloaded, but we still handle it when
2193 // mangling expressions.
2194 case OO_Conditional: Out << "qu"; break;
2195 // Proposal on cxx-abi-dev, 2015-10-21.
2196 // ::= aw # co_await
2197 case OO_Coawait: Out << "aw"; break;
2198 // Proposed in cxx-abi github issue 43.
2200 case OO_Spaceship: Out << "ss"; break;
2203 case NUM_OVERLOADED_OPERATORS:
2204 llvm_unreachable("Not an overloaded operator");
2208 void CXXNameMangler::mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST) {
2209 // Vendor qualifiers come first and if they are order-insensitive they must
2210 // be emitted in reversed alphabetical order, see Itanium ABI 5.1.5.
2212 // <type> ::= U <addrspace-expr>
2215 mangleExpression(DAST->getAddrSpaceExpr());
2219 // Address space qualifiers start with an ordinary letter.
2220 if (Quals.hasAddressSpace()) {
2221 // Address space extension:
2223 // <type> ::= U <target-addrspace>
2224 // <type> ::= U <OpenCL-addrspace>
2225 // <type> ::= U <CUDA-addrspace>
2227 SmallString<64> ASString;
2228 LangAS AS = Quals.getAddressSpace();
2230 if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
2231 // <target-addrspace> ::= "AS" <address-space-number>
2232 unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
2234 ASString = "AS" + llvm::utostr(TargetAS);
2237 default: llvm_unreachable("Not a language specific address space");
2238 // <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
2239 // "private"| "generic" ]
2240 case LangAS::opencl_global: ASString = "CLglobal"; break;
2241 case LangAS::opencl_local: ASString = "CLlocal"; break;
2242 case LangAS::opencl_constant: ASString = "CLconstant"; break;
2243 case LangAS::opencl_private: ASString = "CLprivate"; break;
2244 case LangAS::opencl_generic: ASString = "CLgeneric"; break;
2245 // <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
2246 case LangAS::cuda_device: ASString = "CUdevice"; break;
2247 case LangAS::cuda_constant: ASString = "CUconstant"; break;
2248 case LangAS::cuda_shared: ASString = "CUshared"; break;
2251 if (!ASString.empty())
2252 mangleVendorQualifier(ASString);
2255 // The ARC ownership qualifiers start with underscores.
2256 // Objective-C ARC Extension:
2258 // <type> ::= U "__strong"
2259 // <type> ::= U "__weak"
2260 // <type> ::= U "__autoreleasing"
2262 // Note: we emit __weak first to preserve the order as
2263 // required by the Itanium ABI.
2264 if (Quals.getObjCLifetime() == Qualifiers::OCL_Weak)
2265 mangleVendorQualifier("__weak");
2267 // __unaligned (from -fms-extensions)
2268 if (Quals.hasUnaligned())
2269 mangleVendorQualifier("__unaligned");
2271 // Remaining ARC ownership qualifiers.
2272 switch (Quals.getObjCLifetime()) {
2273 case Qualifiers::OCL_None:
2276 case Qualifiers::OCL_Weak:
2277 // Do nothing as we already handled this case above.
2280 case Qualifiers::OCL_Strong:
2281 mangleVendorQualifier("__strong");
2284 case Qualifiers::OCL_Autoreleasing:
2285 mangleVendorQualifier("__autoreleasing");
2288 case Qualifiers::OCL_ExplicitNone:
2289 // The __unsafe_unretained qualifier is *not* mangled, so that
2290 // __unsafe_unretained types in ARC produce the same manglings as the
2291 // equivalent (but, naturally, unqualified) types in non-ARC, providing
2292 // better ABI compatibility.
2294 // It's safe to do this because unqualified 'id' won't show up
2295 // in any type signatures that need to be mangled.
2299 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const
2300 if (Quals.hasRestrict())
2302 if (Quals.hasVolatile())
2304 if (Quals.hasConst())
2308 void CXXNameMangler::mangleVendorQualifier(StringRef name) {
2309 Out << 'U' << name.size() << name;
2312 void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
2313 // <ref-qualifier> ::= R # lvalue reference
2314 // ::= O # rvalue-reference
2315 switch (RefQualifier) {
2329 void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
2330 Context.mangleObjCMethodName(MD, Out);
2333 static bool isTypeSubstitutable(Qualifiers Quals, const Type *Ty) {
2336 if (Ty->isSpecificBuiltinType(BuiltinType::ObjCSel))
2338 if (Ty->isOpenCLSpecificType())
2340 if (Ty->isBuiltinType())
2346 void CXXNameMangler::mangleType(QualType T) {
2347 // If our type is instantiation-dependent but not dependent, we mangle
2348 // it as it was written in the source, removing any top-level sugar.
2349 // Otherwise, use the canonical type.
2351 // FIXME: This is an approximation of the instantiation-dependent name
2352 // mangling rules, since we should really be using the type as written and
2353 // augmented via semantic analysis (i.e., with implicit conversions and
2354 // default template arguments) for any instantiation-dependent type.
2355 // Unfortunately, that requires several changes to our AST:
2356 // - Instantiation-dependent TemplateSpecializationTypes will need to be
2357 // uniqued, so that we can handle substitutions properly
2358 // - Default template arguments will need to be represented in the
2359 // TemplateSpecializationType, since they need to be mangled even though
2360 // they aren't written.
2361 // - Conversions on non-type template arguments need to be expressed, since
2362 // they can affect the mangling of sizeof/alignof.
2364 // FIXME: This is wrong when mapping to the canonical type for a dependent
2365 // type discards instantiation-dependent portions of the type, such as for:
2367 // template<typename T, int N> void f(T (&)[sizeof(N)]);
2368 // template<typename T> void f(T() throw(typename T::type)); (pre-C++17)
2370 // It's also wrong in the opposite direction when instantiation-dependent,
2371 // canonically-equivalent types differ in some irrelevant portion of inner
2372 // type sugar. In such cases, we fail to form correct substitutions, eg:
2374 // template<int N> void f(A<sizeof(N)> *, A<sizeof(N)> (*));
2376 // We should instead canonicalize the non-instantiation-dependent parts,
2377 // regardless of whether the type as a whole is dependent or instantiation
2379 if (!T->isInstantiationDependentType() || T->isDependentType())
2380 T = T.getCanonicalType();
2382 // Desugar any types that are purely sugar.
2384 // Don't desugar through template specialization types that aren't
2385 // type aliases. We need to mangle the template arguments as written.
2386 if (const TemplateSpecializationType *TST
2387 = dyn_cast<TemplateSpecializationType>(T))
2388 if (!TST->isTypeAlias())
2392 = T.getSingleStepDesugaredType(Context.getASTContext());
2399 SplitQualType split = T.split();
2400 Qualifiers quals = split.Quals;
2401 const Type *ty = split.Ty;
2403 bool isSubstitutable = isTypeSubstitutable(quals, ty);
2404 if (isSubstitutable && mangleSubstitution(T))
2407 // If we're mangling a qualified array type, push the qualifiers to
2408 // the element type.
2409 if (quals && isa<ArrayType>(T)) {
2410 ty = Context.getASTContext().getAsArrayType(T);
2411 quals = Qualifiers();
2413 // Note that we don't update T: we want to add the
2414 // substitution at the original type.
2417 if (quals || ty->isDependentAddressSpaceType()) {
2418 if (const DependentAddressSpaceType *DAST =
2419 dyn_cast<DependentAddressSpaceType>(ty)) {
2420 SplitQualType splitDAST = DAST->getPointeeType().split();
2421 mangleQualifiers(splitDAST.Quals, DAST);
2422 mangleType(QualType(splitDAST.Ty, 0));
2424 mangleQualifiers(quals);
2426 // Recurse: even if the qualified type isn't yet substitutable,
2427 // the unqualified type might be.
2428 mangleType(QualType(ty, 0));
2431 switch (ty->getTypeClass()) {
2432 #define ABSTRACT_TYPE(CLASS, PARENT)
2433 #define NON_CANONICAL_TYPE(CLASS, PARENT) \
2435 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
2437 #define TYPE(CLASS, PARENT) \
2439 mangleType(static_cast<const CLASS##Type*>(ty)); \
2441 #include "clang/AST/TypeNodes.def"
2445 // Add the substitution.
2446 if (isSubstitutable)
2450 void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) {
2451 if (!mangleStandardSubstitution(ND))
2455 void CXXNameMangler::mangleType(const BuiltinType *T) {
2456 // <type> ::= <builtin-type>
2457 // <builtin-type> ::= v # void
2461 // ::= a # signed char
2462 // ::= h # unsigned char
2464 // ::= t # unsigned short
2466 // ::= j # unsigned int
2468 // ::= m # unsigned long
2469 // ::= x # long long, __int64
2470 // ::= y # unsigned long long, __int64
2472 // ::= o # unsigned __int128
2475 // ::= e # long double, __float80
2476 // ::= g # __float128
2477 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits)
2478 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits)
2479 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits)
2480 // ::= Dh # IEEE 754r half-precision floating point (16 bits)
2481 // ::= DF <number> _ # ISO/IEC TS 18661 binary floating point type _FloatN (N bits);
2482 // ::= Di # char32_t
2483 // ::= Ds # char16_t
2484 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
2485 // ::= u <source-name> # vendor extended type
2486 std::string type_name;
2487 switch (T->getKind()) {
2488 case BuiltinType::Void:
2491 case BuiltinType::Bool:
2494 case BuiltinType::Char_U:
2495 case BuiltinType::Char_S:
2498 case BuiltinType::UChar:
2501 case BuiltinType::UShort:
2504 case BuiltinType::UInt:
2507 case BuiltinType::ULong:
2510 case BuiltinType::ULongLong:
2513 case BuiltinType::UInt128:
2516 case BuiltinType::SChar:
2519 case BuiltinType::WChar_S:
2520 case BuiltinType::WChar_U:
2523 case BuiltinType::Char16:
2526 case BuiltinType::Char32:
2529 case BuiltinType::Short:
2532 case BuiltinType::Int:
2535 case BuiltinType::Long:
2538 case BuiltinType::LongLong:
2541 case BuiltinType::Int128:
2544 case BuiltinType::Float16:
2547 case BuiltinType::Half:
2550 case BuiltinType::Float:
2553 case BuiltinType::Double:
2556 case BuiltinType::LongDouble:
2557 Out << (getASTContext().getTargetInfo().useFloat128ManglingForLongDouble()
2561 case BuiltinType::Float128:
2562 if (getASTContext().getTargetInfo().useFloat128ManglingForLongDouble())
2563 Out << "U10__float128"; // Match the GCC mangling
2567 case BuiltinType::NullPtr:
2571 #define BUILTIN_TYPE(Id, SingletonId)
2572 #define PLACEHOLDER_TYPE(Id, SingletonId) \
2573 case BuiltinType::Id:
2574 #include "clang/AST/BuiltinTypes.def"
2575 case BuiltinType::Dependent:
2577 llvm_unreachable("mangling a placeholder type");
2579 case BuiltinType::ObjCId:
2580 Out << "11objc_object";
2582 case BuiltinType::ObjCClass:
2583 Out << "10objc_class";
2585 case BuiltinType::ObjCSel:
2586 Out << "13objc_selector";
2588 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2589 case BuiltinType::Id: \
2590 type_name = "ocl_" #ImgType "_" #Suffix; \
2591 Out << type_name.size() << type_name; \
2593 #include "clang/Basic/OpenCLImageTypes.def"
2594 case BuiltinType::OCLSampler:
2595 Out << "11ocl_sampler";
2597 case BuiltinType::OCLEvent:
2598 Out << "9ocl_event";
2600 case BuiltinType::OCLClkEvent:
2601 Out << "12ocl_clkevent";
2603 case BuiltinType::OCLQueue:
2604 Out << "9ocl_queue";
2606 case BuiltinType::OCLReserveID:
2607 Out << "13ocl_reserveid";
2612 StringRef CXXNameMangler::getCallingConvQualifierName(CallingConv CC) {
2618 case CC_X86FastCall:
2619 case CC_X86ThisCall:
2620 case CC_X86VectorCall:
2627 case CC_IntelOclBicc:
2628 case CC_SpirFunction:
2629 case CC_OpenCLKernel:
2630 case CC_PreserveMost:
2631 case CC_PreserveAll:
2632 // FIXME: we should be mangling all of the above.
2638 llvm_unreachable("bad calling convention");
2641 void CXXNameMangler::mangleExtFunctionInfo(const FunctionType *T) {
2643 if (T->getExtInfo() == FunctionType::ExtInfo())
2646 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
2647 // This will get more complicated in the future if we mangle other
2648 // things here; but for now, since we mangle ns_returns_retained as
2649 // a qualifier on the result type, we can get away with this:
2650 StringRef CCQualifier = getCallingConvQualifierName(T->getExtInfo().getCC());
2651 if (!CCQualifier.empty())
2652 mangleVendorQualifier(CCQualifier);
2659 CXXNameMangler::mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo PI) {
2660 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
2662 // Note that these are *not* substitution candidates. Demanglers might
2663 // have trouble with this if the parameter type is fully substituted.
2665 switch (PI.getABI()) {
2666 case ParameterABI::Ordinary:
2669 // All of these start with "swift", so they come before "ns_consumed".
2670 case ParameterABI::SwiftContext:
2671 case ParameterABI::SwiftErrorResult:
2672 case ParameterABI::SwiftIndirectResult:
2673 mangleVendorQualifier(getParameterABISpelling(PI.getABI()));
2677 if (PI.isConsumed())
2678 mangleVendorQualifier("ns_consumed");
2680 if (PI.isNoEscape())
2681 mangleVendorQualifier("noescape");
2684 // <type> ::= <function-type>
2685 // <function-type> ::= [<CV-qualifiers>] F [Y]
2686 // <bare-function-type> [<ref-qualifier>] E
2687 void CXXNameMangler::mangleType(const FunctionProtoType *T) {
2688 mangleExtFunctionInfo(T);
2690 // Mangle CV-qualifiers, if present. These are 'this' qualifiers,
2691 // e.g. "const" in "int (A::*)() const".
2692 mangleQualifiers(Qualifiers::fromCVRMask(T->getTypeQuals()));
2694 // Mangle instantiation-dependent exception-specification, if present,
2695 // per cxx-abi-dev proposal on 2016-10-11.
2696 if (T->hasInstantiationDependentExceptionSpec()) {
2697 if (T->getExceptionSpecType() == EST_ComputedNoexcept) {
2699 mangleExpression(T->getNoexceptExpr());
2702 assert(T->getExceptionSpecType() == EST_Dynamic);
2704 for (auto ExceptTy : T->exceptions())
2705 mangleType(ExceptTy);
2708 } else if (T->isNothrow(getASTContext())) {
2714 // FIXME: We don't have enough information in the AST to produce the 'Y'
2715 // encoding for extern "C" function types.
2716 mangleBareFunctionType(T, /*MangleReturnType=*/true);
2718 // Mangle the ref-qualifier, if present.
2719 mangleRefQualifier(T->getRefQualifier());
2724 void CXXNameMangler::mangleType(const FunctionNoProtoType *T) {
2725 // Function types without prototypes can arise when mangling a function type
2726 // within an overloadable function in C. We mangle these as the absence of any
2727 // parameter types (not even an empty parameter list).
2730 FunctionTypeDepthState saved = FunctionTypeDepth.push();
2732 FunctionTypeDepth.enterResultType();
2733 mangleType(T->getReturnType());
2734 FunctionTypeDepth.leaveResultType();
2736 FunctionTypeDepth.pop(saved);
2740 void CXXNameMangler::mangleBareFunctionType(const FunctionProtoType *Proto,
2741 bool MangleReturnType,
2742 const FunctionDecl *FD) {
2743 // Record that we're in a function type. See mangleFunctionParam
2744 // for details on what we're trying to achieve here.
2745 FunctionTypeDepthState saved = FunctionTypeDepth.push();
2747 // <bare-function-type> ::= <signature type>+
2748 if (MangleReturnType) {
2749 FunctionTypeDepth.enterResultType();
2751 // Mangle ns_returns_retained as an order-sensitive qualifier here.
2752 if (Proto->getExtInfo().getProducesResult() && FD == nullptr)
2753 mangleVendorQualifier("ns_returns_retained");
2755 // Mangle the return type without any direct ARC ownership qualifiers.
2756 QualType ReturnTy = Proto->getReturnType();
2757 if (ReturnTy.getObjCLifetime()) {
2758 auto SplitReturnTy = ReturnTy.split();
2759 SplitReturnTy.Quals.removeObjCLifetime();
2760 ReturnTy = getASTContext().getQualifiedType(SplitReturnTy);
2762 mangleType(ReturnTy);
2764 FunctionTypeDepth.leaveResultType();
2767 if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
2768 // <builtin-type> ::= v # void
2771 FunctionTypeDepth.pop(saved);
2775 assert(!FD || FD->getNumParams() == Proto->getNumParams());
2776 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
2777 // Mangle extended parameter info as order-sensitive qualifiers here.
2778 if (Proto->hasExtParameterInfos() && FD == nullptr) {
2779 mangleExtParameterInfo(Proto->getExtParameterInfo(I));
2783 QualType ParamTy = Proto->getParamType(I);
2784 mangleType(Context.getASTContext().getSignatureParameterType(ParamTy));
2787 if (auto *Attr = FD->getParamDecl(I)->getAttr<PassObjectSizeAttr>()) {
2788 // Attr can only take 1 character, so we can hardcode the length below.
2789 assert(Attr->getType() <= 9 && Attr->getType() >= 0);
2790 Out << "U17pass_object_size" << Attr->getType();
2795 FunctionTypeDepth.pop(saved);
2797 // <builtin-type> ::= z # ellipsis
2798 if (Proto->isVariadic())
2802 // <type> ::= <class-enum-type>
2803 // <class-enum-type> ::= <name>
2804 void CXXNameMangler::mangleType(const UnresolvedUsingType *T) {
2805 mangleName(T->getDecl());
2808 // <type> ::= <class-enum-type>
2809 // <class-enum-type> ::= <name>
2810 void CXXNameMangler::mangleType(const EnumType *T) {
2811 mangleType(static_cast<const TagType*>(T));
2813 void CXXNameMangler::mangleType(const RecordType *T) {
2814 mangleType(static_cast<const TagType*>(T));
2816 void CXXNameMangler::mangleType(const TagType *T) {
2817 mangleName(T->getDecl());
2820 // <type> ::= <array-type>
2821 // <array-type> ::= A <positive dimension number> _ <element type>
2822 // ::= A [<dimension expression>] _ <element type>
2823 void CXXNameMangler::mangleType(const ConstantArrayType *T) {
2824 Out << 'A' << T->getSize() << '_';
2825 mangleType(T->getElementType());
2827 void CXXNameMangler::mangleType(const VariableArrayType *T) {
2829 // decayed vla types (size 0) will just be skipped.
2830 if (T->getSizeExpr())
2831 mangleExpression(T->getSizeExpr());
2833 mangleType(T->getElementType());
2835 void CXXNameMangler::mangleType(const DependentSizedArrayType *T) {
2837 mangleExpression(T->getSizeExpr());
2839 mangleType(T->getElementType());
2841 void CXXNameMangler::mangleType(const IncompleteArrayType *T) {
2843 mangleType(T->getElementType());
2846 // <type> ::= <pointer-to-member-type>
2847 // <pointer-to-member-type> ::= M <class type> <member type>
2848 void CXXNameMangler::mangleType(const MemberPointerType *T) {
2850 mangleType(QualType(T->getClass(), 0));
2851 QualType PointeeType = T->getPointeeType();
2852 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) {
2855 // Itanium C++ ABI 5.1.8:
2857 // The type of a non-static member function is considered to be different,
2858 // for the purposes of substitution, from the type of a namespace-scope or
2859 // static member function whose type appears similar. The types of two
2860 // non-static member functions are considered to be different, for the
2861 // purposes of substitution, if the functions are members of different
2862 // classes. In other words, for the purposes of substitution, the class of
2863 // which the function is a member is considered part of the type of
2866 // Given that we already substitute member function pointers as a
2867 // whole, the net effect of this rule is just to unconditionally
2868 // suppress substitution on the function type in a member pointer.
2869 // We increment the SeqID here to emulate adding an entry to the
2870 // substitution table.
2873 mangleType(PointeeType);
2876 // <type> ::= <template-param>
2877 void CXXNameMangler::mangleType(const TemplateTypeParmType *T) {
2878 mangleTemplateParameter(T->getIndex());
2881 // <type> ::= <template-param>
2882 void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) {
2883 // FIXME: not clear how to mangle this!
2884 // template <class T...> class A {
2885 // template <class U...> void foo(T(*)(U) x...);
2887 Out << "_SUBSTPACK_";
2890 // <type> ::= P <type> # pointer-to
2891 void CXXNameMangler::mangleType(const PointerType *T) {
2893 mangleType(T->getPointeeType());
2895 void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) {
2897 mangleType(T->getPointeeType());
2900 // <type> ::= R <type> # reference-to
2901 void CXXNameMangler::mangleType(const LValueReferenceType *T) {
2903 mangleType(T->getPointeeType());
2906 // <type> ::= O <type> # rvalue reference-to (C++0x)
2907 void CXXNameMangler::mangleType(const RValueReferenceType *T) {
2909 mangleType(T->getPointeeType());
2912 // <type> ::= C <type> # complex pair (C 2000)
2913 void CXXNameMangler::mangleType(const ComplexType *T) {
2915 mangleType(T->getElementType());
2918 // ARM's ABI for Neon vector types specifies that they should be mangled as
2919 // if they are structs (to match ARM's initial implementation). The
2920 // vector type must be one of the special types predefined by ARM.
2921 void CXXNameMangler::mangleNeonVectorType(const VectorType *T) {
2922 QualType EltType = T->getElementType();
2923 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType");
2924 const char *EltName = nullptr;
2925 if (T->getVectorKind() == VectorType::NeonPolyVector) {
2926 switch (cast<BuiltinType>(EltType)->getKind()) {
2927 case BuiltinType::SChar:
2928 case BuiltinType::UChar:
2929 EltName = "poly8_t";
2931 case BuiltinType::Short:
2932 case BuiltinType::UShort:
2933 EltName = "poly16_t";
2935 case BuiltinType::ULongLong:
2936 EltName = "poly64_t";
2938 default: llvm_unreachable("unexpected Neon polynomial vector element type");
2941 switch (cast<BuiltinType>(EltType)->getKind()) {
2942 case BuiltinType::SChar: EltName = "int8_t"; break;
2943 case BuiltinType::UChar: EltName = "uint8_t"; break;
2944 case BuiltinType::Short: EltName = "int16_t"; break;
2945 case BuiltinType::UShort: EltName = "uint16_t"; break;
2946 case BuiltinType::Int: EltName = "int32_t"; break;
2947 case BuiltinType::UInt: EltName = "uint32_t"; break;
2948 case BuiltinType::LongLong: EltName = "int64_t"; break;
2949 case BuiltinType::ULongLong: EltName = "uint64_t"; break;
2950 case BuiltinType::Double: EltName = "float64_t"; break;
2951 case BuiltinType::Float: EltName = "float32_t"; break;
2952 case BuiltinType::Half: EltName = "float16_t";break;
2954 llvm_unreachable("unexpected Neon vector element type");
2957 const char *BaseName = nullptr;
2958 unsigned BitSize = (T->getNumElements() *
2959 getASTContext().getTypeSize(EltType));
2961 BaseName = "__simd64_";
2963 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits");
2964 BaseName = "__simd128_";
2966 Out << strlen(BaseName) + strlen(EltName);
2967 Out << BaseName << EltName;
2970 static StringRef mangleAArch64VectorBase(const BuiltinType *EltType) {
2971 switch (EltType->getKind()) {
2972 case BuiltinType::SChar:
2974 case BuiltinType::Short:
2976 case BuiltinType::Int:
2978 case BuiltinType::Long:
2979 case BuiltinType::LongLong:
2981 case BuiltinType::UChar:
2983 case BuiltinType::UShort:
2985 case BuiltinType::UInt:
2987 case BuiltinType::ULong:
2988 case BuiltinType::ULongLong:
2990 case BuiltinType::Half:
2992 case BuiltinType::Float:
2994 case BuiltinType::Double:
2997 llvm_unreachable("Unexpected vector element base type");
3001 // AArch64's ABI for Neon vector types specifies that they should be mangled as
3002 // the equivalent internal name. The vector type must be one of the special
3003 // types predefined by ARM.
3004 void CXXNameMangler::mangleAArch64NeonVectorType(const VectorType *T) {
3005 QualType EltType = T->getElementType();
3006 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType");
3008 (T->getNumElements() * getASTContext().getTypeSize(EltType));
3009 (void)BitSize; // Silence warning.
3011 assert((BitSize == 64 || BitSize == 128) &&
3012 "Neon vector type not 64 or 128 bits");
3015 if (T->getVectorKind() == VectorType::NeonPolyVector) {
3016 switch (cast<BuiltinType>(EltType)->getKind()) {
3017 case BuiltinType::UChar:
3020 case BuiltinType::UShort:
3023 case BuiltinType::ULong:
3024 case BuiltinType::ULongLong:
3028 llvm_unreachable("unexpected Neon polynomial vector element type");
3031 EltName = mangleAArch64VectorBase(cast<BuiltinType>(EltType));
3033 std::string TypeName =
3034 ("__" + EltName + "x" + Twine(T->getNumElements()) + "_t").str();
3035 Out << TypeName.length() << TypeName;
3038 // GNU extension: vector types
3039 // <type> ::= <vector-type>
3040 // <vector-type> ::= Dv <positive dimension number> _
3041 // <extended element type>
3042 // ::= Dv [<dimension expression>] _ <element type>
3043 // <extended element type> ::= <element type>
3044 // ::= p # AltiVec vector pixel
3045 // ::= b # Altivec vector bool
3046 void CXXNameMangler::mangleType(const VectorType *T) {
3047 if ((T->getVectorKind() == VectorType::NeonVector ||
3048 T->getVectorKind() == VectorType::NeonPolyVector)) {
3049 llvm::Triple Target = getASTContext().getTargetInfo().getTriple();
3050 llvm::Triple::ArchType Arch =
3051 getASTContext().getTargetInfo().getTriple().getArch();
3052 if ((Arch == llvm::Triple::aarch64 ||
3053 Arch == llvm::Triple::aarch64_be) && !Target.isOSDarwin())
3054 mangleAArch64NeonVectorType(T);
3056 mangleNeonVectorType(T);
3059 Out << "Dv" << T->getNumElements() << '_';
3060 if (T->getVectorKind() == VectorType::AltiVecPixel)
3062 else if (T->getVectorKind() == VectorType::AltiVecBool)
3065 mangleType(T->getElementType());
3067 void CXXNameMangler::mangleType(const ExtVectorType *T) {
3068 mangleType(static_cast<const VectorType*>(T));
3070 void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) {
3072 mangleExpression(T->getSizeExpr());
3074 mangleType(T->getElementType());
3077 void CXXNameMangler::mangleType(const DependentAddressSpaceType *T) {
3078 SplitQualType split = T->getPointeeType().split();
3079 mangleQualifiers(split.Quals, T);
3080 mangleType(QualType(split.Ty, 0));
3083 void CXXNameMangler::mangleType(const PackExpansionType *T) {
3084 // <type> ::= Dp <type> # pack expansion (C++0x)
3086 mangleType(T->getPattern());
3089 void CXXNameMangler::mangleType(const ObjCInterfaceType *T) {
3090 mangleSourceName(T->getDecl()->getIdentifier());
3093 void CXXNameMangler::mangleType(const ObjCObjectType *T) {
3094 // Treat __kindof as a vendor extended type qualifier.
3095 if (T->isKindOfType())
3096 Out << "U8__kindof";
3098 if (!T->qual_empty()) {
3099 // Mangle protocol qualifiers.
3100 SmallString<64> QualStr;
3101 llvm::raw_svector_ostream QualOS(QualStr);
3102 QualOS << "objcproto";
3103 for (const auto *I : T->quals()) {
3104 StringRef name = I->getName();
3105 QualOS << name.size() << name;
3107 Out << 'U' << QualStr.size() << QualStr;
3110 mangleType(T->getBaseType());
3112 if (T->isSpecialized()) {
3113 // Mangle type arguments as I <type>+ E
3115 for (auto typeArg : T->getTypeArgs())
3116 mangleType(typeArg);
3121 void CXXNameMangler::mangleType(const BlockPointerType *T) {
3122 Out << "U13block_pointer";
3123 mangleType(T->getPointeeType());
3126 void CXXNameMangler::mangleType(const InjectedClassNameType *T) {
3127 // Mangle injected class name types as if the user had written the
3128 // specialization out fully. It may not actually be possible to see
3129 // this mangling, though.
3130 mangleType(T->getInjectedSpecializationType());
3133 void CXXNameMangler::mangleType(const TemplateSpecializationType *T) {
3134 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) {
3135 mangleTemplateName(TD, T->getArgs(), T->getNumArgs());
3137 if (mangleSubstitution(QualType(T, 0)))
3140 mangleTemplatePrefix(T->getTemplateName());
3142 // FIXME: GCC does not appear to mangle the template arguments when
3143 // the template in question is a dependent template name. Should we
3144 // emulate that badness?
3145 mangleTemplateArgs(T->getArgs(), T->getNumArgs());
3146 addSubstitution(QualType(T, 0));
3150 void CXXNameMangler::mangleType(const DependentNameType *T) {
3151 // Proposal by cxx-abi-dev, 2014-03-26
3152 // <class-enum-type> ::= <name> # non-dependent or dependent type name or
3153 // # dependent elaborated type specifier using
3155 // ::= Ts <name> # dependent elaborated type specifier using
3156 // # 'struct' or 'class'
3157 // ::= Tu <name> # dependent elaborated type specifier using
3159 // ::= Te <name> # dependent elaborated type specifier using
3161 switch (T->getKeyword()) {
3177 // Typename types are always nested
3179 manglePrefix(T->getQualifier());
3180 mangleSourceName(T->getIdentifier());
3184 void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) {
3185 // Dependently-scoped template types are nested if they have a prefix.
3188 // TODO: avoid making this TemplateName.
3189 TemplateName Prefix =
3190 getASTContext().getDependentTemplateName(T->getQualifier(),
3191 T->getIdentifier());
3192 mangleTemplatePrefix(Prefix);
3194 // FIXME: GCC does not appear to mangle the template arguments when
3195 // the template in question is a dependent template name. Should we
3196 // emulate that badness?
3197 mangleTemplateArgs(T->getArgs(), T->getNumArgs());
3201 void CXXNameMangler::mangleType(const TypeOfType *T) {
3202 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3203 // "extension with parameters" mangling.
3207 void CXXNameMangler::mangleType(const TypeOfExprType *T) {
3208 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3209 // "extension with parameters" mangling.
3213 void CXXNameMangler::mangleType(const DecltypeType *T) {
3214 Expr *E = T->getUnderlyingExpr();
3216 // type ::= Dt <expression> E # decltype of an id-expression
3217 // # or class member access
3218 // ::= DT <expression> E # decltype of an expression
3220 // This purports to be an exhaustive list of id-expressions and
3221 // class member accesses. Note that we do not ignore parentheses;
3222 // parentheses change the semantics of decltype for these
3223 // expressions (and cause the mangler to use the other form).
3224 if (isa<DeclRefExpr>(E) ||
3225 isa<MemberExpr>(E) ||
3226 isa<UnresolvedLookupExpr>(E) ||
3227 isa<DependentScopeDeclRefExpr>(E) ||
3228 isa<CXXDependentScopeMemberExpr>(E) ||
3229 isa<UnresolvedMemberExpr>(E))
3233 mangleExpression(E);
3237 void CXXNameMangler::mangleType(const UnaryTransformType *T) {
3238 // If this is dependent, we need to record that. If not, we simply
3239 // mangle it as the underlying type since they are equivalent.
3240 if (T->isDependentType()) {
3243 switch (T->getUTTKind()) {
3244 case UnaryTransformType::EnumUnderlyingType:
3250 mangleType(T->getBaseType());
3253 void CXXNameMangler::mangleType(const AutoType *T) {
3254 QualType D = T->getDeducedType();
3255 // <builtin-type> ::= Da # dependent auto
3257 assert(T->getKeyword() != AutoTypeKeyword::GNUAutoType &&
3258 "shouldn't need to mangle __auto_type!");
3259 Out << (T->isDecltypeAuto() ? "Dc" : "Da");
3264 void CXXNameMangler::mangleType(const DeducedTemplateSpecializationType *T) {
3265 // FIXME: This is not the right mangling. We also need to include a scope
3266 // here in some cases.
3267 QualType D = T->getDeducedType();
3269 mangleUnscopedTemplateName(T->getTemplateName(), nullptr);
3274 void CXXNameMangler::mangleType(const AtomicType *T) {
3275 // <type> ::= U <source-name> <type> # vendor extended type qualifier
3276 // (Until there's a standardized mangling...)
3278 mangleType(T->getValueType());
3281 void CXXNameMangler::mangleType(const PipeType *T) {
3282 // Pipe type mangling rules are described in SPIR 2.0 specification
3283 // A.1 Data types and A.3 Summary of changes
3284 // <type> ::= 8ocl_pipe
3288 void CXXNameMangler::mangleIntegerLiteral(QualType T,
3289 const llvm::APSInt &Value) {
3290 // <expr-primary> ::= L <type> <value number> E # integer literal
3294 if (T->isBooleanType()) {
3295 // Boolean values are encoded as 0/1.
3296 Out << (Value.getBoolValue() ? '1' : '0');
3298 mangleNumber(Value);
3304 void CXXNameMangler::mangleMemberExprBase(const Expr *Base, bool IsArrow) {
3305 // Ignore member expressions involving anonymous unions.
3306 while (const auto *RT = Base->getType()->getAs<RecordType>()) {
3307 if (!RT->getDecl()->isAnonymousStructOrUnion())
3309 const auto *ME = dyn_cast<MemberExpr>(Base);
3312 Base = ME->getBase();
3313 IsArrow = ME->isArrow();
3316 if (Base->isImplicitCXXThis()) {
3317 // Note: GCC mangles member expressions to the implicit 'this' as
3318 // *this., whereas we represent them as this->. The Itanium C++ ABI
3319 // does not specify anything here, so we follow GCC.
3322 Out << (IsArrow ? "pt" : "dt");
3323 mangleExpression(Base);
3327 /// Mangles a member expression.
3328 void CXXNameMangler::mangleMemberExpr(const Expr *base,
3330 NestedNameSpecifier *qualifier,
3331 NamedDecl *firstQualifierLookup,
3332 DeclarationName member,
3333 const TemplateArgumentLoc *TemplateArgs,
3334 unsigned NumTemplateArgs,
3336 // <expression> ::= dt <expression> <unresolved-name>
3337 // ::= pt <expression> <unresolved-name>
3339 mangleMemberExprBase(base, isArrow);
3340 mangleUnresolvedName(qualifier, member, TemplateArgs, NumTemplateArgs, arity);
3343 /// Look at the callee of the given call expression and determine if
3344 /// it's a parenthesized id-expression which would have triggered ADL
3346 static bool isParenthesizedADLCallee(const CallExpr *call) {
3347 const Expr *callee = call->getCallee();
3348 const Expr *fn = callee->IgnoreParens();
3350 // Must be parenthesized. IgnoreParens() skips __extension__ nodes,
3351 // too, but for those to appear in the callee, it would have to be
3353 if (callee == fn) return false;
3355 // Must be an unresolved lookup.
3356 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn);
3357 if (!lookup) return false;
3359 assert(!lookup->requiresADL());
3361 // Must be an unqualified lookup.
3362 if (lookup->getQualifier()) return false;
3364 // Must not have found a class member. Note that if one is a class
3365 // member, they're all class members.
3366 if (lookup->getNumDecls() > 0 &&
3367 (*lookup->decls_begin())->isCXXClassMember())
3370 // Otherwise, ADL would have been triggered.
3374 void CXXNameMangler::mangleCastExpression(const Expr *E, StringRef CastEncoding) {
3375 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E);
3376 Out << CastEncoding;
3377 mangleType(ECE->getType());
3378 mangleExpression(ECE->getSubExpr());
3381 void CXXNameMangler::mangleInitListElements(const InitListExpr *InitList) {
3382 if (auto *Syntactic = InitList->getSyntacticForm())
3383 InitList = Syntactic;
3384 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i)
3385 mangleExpression(InitList->getInit(i));
3388 void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
3389 // <expression> ::= <unary operator-name> <expression>
3390 // ::= <binary operator-name> <expression> <expression>
3391 // ::= <trinary operator-name> <expression> <expression> <expression>
3392 // ::= cv <type> expression # conversion with one argument
3393 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments
3394 // ::= dc <type> <expression> # dynamic_cast<type> (expression)
3395 // ::= sc <type> <expression> # static_cast<type> (expression)
3396 // ::= cc <type> <expression> # const_cast<type> (expression)
3397 // ::= rc <type> <expression> # reinterpret_cast<type> (expression)
3398 // ::= st <type> # sizeof (a type)
3399 // ::= at <type> # alignof (a type)
3400 // ::= <template-param>
3401 // ::= <function-param>
3402 // ::= sr <type> <unqualified-name> # dependent name
3403 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id
3404 // ::= ds <expression> <expression> # expr.*expr
3405 // ::= sZ <template-param> # size of a parameter pack
3406 // ::= sZ <function-param> # size of a function parameter pack
3407 // ::= <expr-primary>
3408 // <expr-primary> ::= L <type> <value number> E # integer literal
3409 // ::= L <type <value float> E # floating literal
3410 // ::= L <mangled-name> E # external name
3411 // ::= fpT # 'this' expression
3412 QualType ImplicitlyConvertedToType;
3415 switch (E->getStmtClass()) {
3416 case Expr::NoStmtClass:
3417 #define ABSTRACT_STMT(Type)
3418 #define EXPR(Type, Base)
3419 #define STMT(Type, Base) \
3420 case Expr::Type##Class:
3421 #include "clang/AST/StmtNodes.inc"
3424 // These all can only appear in local or variable-initialization
3425 // contexts and so should never appear in a mangling.
3426 case Expr::AddrLabelExprClass:
3427 case Expr::DesignatedInitUpdateExprClass:
3428 case Expr::ImplicitValueInitExprClass:
3429 case Expr::ArrayInitLoopExprClass:
3430 case Expr::ArrayInitIndexExprClass:
3431 case Expr::NoInitExprClass:
3432 case Expr::ParenListExprClass:
3433 case Expr::LambdaExprClass:
3434 case Expr::MSPropertyRefExprClass:
3435 case Expr::MSPropertySubscriptExprClass:
3436 case Expr::TypoExprClass: // This should no longer exist in the AST by now.
3437 case Expr::OMPArraySectionExprClass:
3438 case Expr::CXXInheritedCtorInitExprClass:
3439 llvm_unreachable("unexpected statement kind");
3441 // FIXME: invent manglings for all these.
3442 case Expr::BlockExprClass:
3443 case Expr::ChooseExprClass:
3444 case Expr::CompoundLiteralExprClass:
3445 case Expr::ExtVectorElementExprClass:
3446 case Expr::GenericSelectionExprClass:
3447 case Expr::ObjCEncodeExprClass:
3448 case Expr::ObjCIsaExprClass:
3449 case Expr::ObjCIvarRefExprClass:
3450 case Expr::ObjCMessageExprClass:
3451 case Expr::ObjCPropertyRefExprClass:
3452 case Expr::ObjCProtocolExprClass:
3453 case Expr::ObjCSelectorExprClass:
3454 case Expr::ObjCStringLiteralClass:
3455 case Expr::ObjCBoxedExprClass:
3456 case Expr::ObjCArrayLiteralClass:
3457 case Expr::ObjCDictionaryLiteralClass:
3458 case Expr::ObjCSubscriptRefExprClass:
3459 case Expr::ObjCIndirectCopyRestoreExprClass:
3460 case Expr::ObjCAvailabilityCheckExprClass:
3461 case Expr::OffsetOfExprClass:
3462 case Expr::PredefinedExprClass:
3463 case Expr::ShuffleVectorExprClass:
3464 case Expr::ConvertVectorExprClass:
3465 case Expr::StmtExprClass:
3466 case Expr::TypeTraitExprClass:
3467 case Expr::ArrayTypeTraitExprClass:
3468 case Expr::ExpressionTraitExprClass:
3469 case Expr::VAArgExprClass:
3470 case Expr::CUDAKernelCallExprClass:
3471 case Expr::AsTypeExprClass:
3472 case Expr::PseudoObjectExprClass:
3473 case Expr::AtomicExprClass:
3476 // As bad as this diagnostic is, it's better than crashing.
3477 DiagnosticsEngine &Diags = Context.getDiags();
3478 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3479 "cannot yet mangle expression type %0");
3480 Diags.Report(E->getExprLoc(), DiagID)
3481 << E->getStmtClassName() << E->getSourceRange();
3486 case Expr::CXXUuidofExprClass: {
3487 const CXXUuidofExpr *UE = cast<CXXUuidofExpr>(E);
3488 if (UE->isTypeOperand()) {
3489 QualType UuidT = UE->getTypeOperand(Context.getASTContext());
3490 Out << "u8__uuidoft";
3493 Expr *UuidExp = UE->getExprOperand();
3494 Out << "u8__uuidofz";
3495 mangleExpression(UuidExp, Arity);
3500 // Even gcc-4.5 doesn't mangle this.
3501 case Expr::BinaryConditionalOperatorClass: {
3502 DiagnosticsEngine &Diags = Context.getDiags();
3504 Diags.getCustomDiagID(DiagnosticsEngine::Error,
3505 "?: operator with omitted middle operand cannot be mangled");
3506 Diags.Report(E->getExprLoc(), DiagID)
3507 << E->getStmtClassName() << E->getSourceRange();
3511 // These are used for internal purposes and cannot be meaningfully mangled.
3512 case Expr::OpaqueValueExprClass:
3513 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?");
3515 case Expr::InitListExprClass: {
3517 mangleInitListElements(cast<InitListExpr>(E));
3522 case Expr::DesignatedInitExprClass: {
3523 auto *DIE = cast<DesignatedInitExpr>(E);
3524 for (const auto &Designator : DIE->designators()) {
3525 if (Designator.isFieldDesignator()) {
3527 mangleSourceName(Designator.getFieldName());
3528 } else if (Designator.isArrayDesignator()) {
3530 mangleExpression(DIE->getArrayIndex(Designator));
3532 assert(Designator.isArrayRangeDesignator() &&
3533 "unknown designator kind");
3535 mangleExpression(DIE->getArrayRangeStart(Designator));
3536 mangleExpression(DIE->getArrayRangeEnd(Designator));
3539 mangleExpression(DIE->getInit());
3543 case Expr::CXXDefaultArgExprClass:
3544 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity);
3547 case Expr::CXXDefaultInitExprClass:
3548 mangleExpression(cast<CXXDefaultInitExpr>(E)->getExpr(), Arity);
3551 case Expr::CXXStdInitializerListExprClass:
3552 mangleExpression(cast<CXXStdInitializerListExpr>(E)->getSubExpr(), Arity);
3555 case Expr::SubstNonTypeTemplateParmExprClass:
3556 mangleExpression(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(),
3560 case Expr::UserDefinedLiteralClass:
3561 // We follow g++'s approach of mangling a UDL as a call to the literal
3563 case Expr::CXXMemberCallExprClass: // fallthrough
3564 case Expr::CallExprClass: {
3565 const CallExpr *CE = cast<CallExpr>(E);
3567 // <expression> ::= cp <simple-id> <expression>* E
3568 // We use this mangling only when the call would use ADL except
3569 // for being parenthesized. Per discussion with David
3570 // Vandervoorde, 2011.04.25.
3571 if (isParenthesizedADLCallee(CE)) {
3573 // The callee here is a parenthesized UnresolvedLookupExpr with
3574 // no qualifier and should always get mangled as a <simple-id>
3577 // <expression> ::= cl <expression>* E
3582 unsigned CallArity = CE->getNumArgs();
3583 for (const Expr *Arg : CE->arguments())
3584 if (isa<PackExpansionExpr>(Arg))
3585 CallArity = UnknownArity;
3587 mangleExpression(CE->getCallee(), CallArity);
3588 for (const Expr *Arg : CE->arguments())
3589 mangleExpression(Arg);
3594 case Expr::CXXNewExprClass: {
3595 const CXXNewExpr *New = cast<CXXNewExpr>(E);
3596 if (New->isGlobalNew()) Out << "gs";
3597 Out << (New->isArray() ? "na" : "nw");
3598 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(),
3599 E = New->placement_arg_end(); I != E; ++I)
3600 mangleExpression(*I);
3602 mangleType(New->getAllocatedType());
3603 if (New->hasInitializer()) {
3604 if (New->getInitializationStyle() == CXXNewExpr::ListInit)
3608 const Expr *Init = New->getInitializer();
3609 if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) {
3610 // Directly inline the initializers.
3611 for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(),
3614 mangleExpression(*I);
3615 } else if (const ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) {
3616 for (unsigned i = 0, e = PLE->getNumExprs(); i != e; ++i)
3617 mangleExpression(PLE->getExpr(i));
3618 } else if (New->getInitializationStyle() == CXXNewExpr::ListInit &&
3619 isa<InitListExpr>(Init)) {
3620 // Only take InitListExprs apart for list-initialization.
3621 mangleInitListElements(cast<InitListExpr>(Init));
3623 mangleExpression(Init);
3629 case Expr::CXXPseudoDestructorExprClass: {
3630 const auto *PDE = cast<CXXPseudoDestructorExpr>(E);
3631 if (const Expr *Base = PDE->getBase())
3632 mangleMemberExprBase(Base, PDE->isArrow());
3633 NestedNameSpecifier *Qualifier = PDE->getQualifier();
3634 if (TypeSourceInfo *ScopeInfo = PDE->getScopeTypeInfo()) {
3636 mangleUnresolvedPrefix(Qualifier,
3637 /*Recursive=*/true);
3638 mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType());
3642 if (!mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType()))
3645 } else if (Qualifier) {
3646 mangleUnresolvedPrefix(Qualifier);
3648 // <base-unresolved-name> ::= dn <destructor-name>
3650 QualType DestroyedType = PDE->getDestroyedType();
3651 mangleUnresolvedTypeOrSimpleId(DestroyedType);
3655 case Expr::MemberExprClass: {
3656 const MemberExpr *ME = cast<MemberExpr>(E);
3657 mangleMemberExpr(ME->getBase(), ME->isArrow(),
3658 ME->getQualifier(), nullptr,
3659 ME->getMemberDecl()->getDeclName(),
3660 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
3665 case Expr::UnresolvedMemberExprClass: {
3666 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E);
3667 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
3668 ME->isArrow(), ME->getQualifier(), nullptr,
3669 ME->getMemberName(),
3670 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
3675 case Expr::CXXDependentScopeMemberExprClass: {
3676 const CXXDependentScopeMemberExpr *ME
3677 = cast<CXXDependentScopeMemberExpr>(E);
3678 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
3679 ME->isArrow(), ME->getQualifier(),
3680 ME->getFirstQualifierFoundInScope(),
3682 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
3687 case Expr::UnresolvedLookupExprClass: {
3688 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E);
3689 mangleUnresolvedName(ULE->getQualifier(), ULE->getName(),
3690 ULE->getTemplateArgs(), ULE->getNumTemplateArgs(),
3695 case Expr::CXXUnresolvedConstructExprClass: {
3696 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E);
3697 unsigned N = CE->arg_size();
3699 if (CE->isListInitialization()) {
3700 assert(N == 1 && "unexpected form for list initialization");
3701 auto *IL = cast<InitListExpr>(CE->getArg(0));
3703 mangleType(CE->getType());
3704 mangleInitListElements(IL);
3710 mangleType(CE->getType());
3711 if (N != 1) Out << '_';
3712 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I));
3713 if (N != 1) Out << 'E';
3717 case Expr::CXXConstructExprClass: {
3718 const auto *CE = cast<CXXConstructExpr>(E);
3719 if (!CE->isListInitialization() || CE->isStdInitListInitialization()) {
3721 CE->getNumArgs() >= 1 &&
3722 (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&
3723 "implicit CXXConstructExpr must have one argument");
3724 return mangleExpression(cast<CXXConstructExpr>(E)->getArg(0));
3727 for (auto *E : CE->arguments())
3728 mangleExpression(E);
3733 case Expr::CXXTemporaryObjectExprClass: {
3734 const auto *CE = cast<CXXTemporaryObjectExpr>(E);
3735 unsigned N = CE->getNumArgs();
3736 bool List = CE->isListInitialization();
3742 mangleType(CE->getType());
3743 if (!List && N != 1)
3745 if (CE->isStdInitListInitialization()) {
3746 // We implicitly created a std::initializer_list<T> for the first argument
3747 // of a constructor of type U in an expression of the form U{a, b, c}.
3748 // Strip all the semantic gunk off the initializer list.
3750 cast<CXXStdInitializerListExpr>(CE->getArg(0)->IgnoreImplicit());
3751 auto *ILE = cast<InitListExpr>(SILE->getSubExpr()->IgnoreImplicit());
3752 mangleInitListElements(ILE);
3754 for (auto *E : CE->arguments())
3755 mangleExpression(E);
3762 case Expr::CXXScalarValueInitExprClass:
3764 mangleType(E->getType());
3768 case Expr::CXXNoexceptExprClass:
3770 mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand());
3773 case Expr::UnaryExprOrTypeTraitExprClass: {
3774 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E);
3776 if (!SAE->isInstantiationDependent()) {
3778 // If the operand of a sizeof or alignof operator is not
3779 // instantiation-dependent it is encoded as an integer literal
3780 // reflecting the result of the operator.
3782 // If the result of the operator is implicitly converted to a known
3783 // integer type, that type is used for the literal; otherwise, the type
3784 // of std::size_t or std::ptrdiff_t is used.
3785 QualType T = (ImplicitlyConvertedToType.isNull() ||
3786 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType()
3787 : ImplicitlyConvertedToType;
3788 llvm::APSInt V = SAE->EvaluateKnownConstInt(Context.getASTContext());
3789 mangleIntegerLiteral(T, V);
3793 switch(SAE->getKind()) {
3800 case UETT_VecStep: {
3801 DiagnosticsEngine &Diags = Context.getDiags();
3802 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3803 "cannot yet mangle vec_step expression");
3804 Diags.Report(DiagID);
3807 case UETT_OpenMPRequiredSimdAlign:
3808 DiagnosticsEngine &Diags = Context.getDiags();
3809 unsigned DiagID = Diags.getCustomDiagID(
3810 DiagnosticsEngine::Error,
3811 "cannot yet mangle __builtin_omp_required_simd_align expression");
3812 Diags.Report(DiagID);
3815 if (SAE->isArgumentType()) {
3817 mangleType(SAE->getArgumentType());
3820 mangleExpression(SAE->getArgumentExpr());
3825 case Expr::CXXThrowExprClass: {
3826 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E);
3827 // <expression> ::= tw <expression> # throw expression
3829 if (TE->getSubExpr()) {
3831 mangleExpression(TE->getSubExpr());
3838 case Expr::CXXTypeidExprClass: {
3839 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E);
3840 // <expression> ::= ti <type> # typeid (type)
3841 // ::= te <expression> # typeid (expression)
3842 if (TIE->isTypeOperand()) {
3844 mangleType(TIE->getTypeOperand(Context.getASTContext()));
3847 mangleExpression(TIE->getExprOperand());
3852 case Expr::CXXDeleteExprClass: {
3853 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E);
3854 // <expression> ::= [gs] dl <expression> # [::] delete expr
3855 // ::= [gs] da <expression> # [::] delete [] expr
3856 if (DE->isGlobalDelete()) Out << "gs";
3857 Out << (DE->isArrayForm() ? "da" : "dl");
3858 mangleExpression(DE->getArgument());
3862 case Expr::UnaryOperatorClass: {
3863 const UnaryOperator *UO = cast<UnaryOperator>(E);
3864 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()),
3866 mangleExpression(UO->getSubExpr());
3870 case Expr::ArraySubscriptExprClass: {
3871 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E);
3873 // Array subscript is treated as a syntactically weird form of
3876 mangleExpression(AE->getLHS());
3877 mangleExpression(AE->getRHS());
3881 case Expr::CompoundAssignOperatorClass: // fallthrough
3882 case Expr::BinaryOperatorClass: {
3883 const BinaryOperator *BO = cast<BinaryOperator>(E);
3884 if (BO->getOpcode() == BO_PtrMemD)
3887 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()),
3889 mangleExpression(BO->getLHS());
3890 mangleExpression(BO->getRHS());
3894 case Expr::ConditionalOperatorClass: {
3895 const ConditionalOperator *CO = cast<ConditionalOperator>(E);
3896 mangleOperatorName(OO_Conditional, /*Arity=*/3);
3897 mangleExpression(CO->getCond());
3898 mangleExpression(CO->getLHS(), Arity);
3899 mangleExpression(CO->getRHS(), Arity);
3903 case Expr::ImplicitCastExprClass: {
3904 ImplicitlyConvertedToType = E->getType();
3905 E = cast<ImplicitCastExpr>(E)->getSubExpr();
3909 case Expr::ObjCBridgedCastExprClass: {
3910 // Mangle ownership casts as a vendor extended operator __bridge,
3911 // __bridge_transfer, or __bridge_retain.
3912 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName();
3913 Out << "v1U" << Kind.size() << Kind;
3915 // Fall through to mangle the cast itself.
3918 case Expr::CStyleCastExprClass:
3919 mangleCastExpression(E, "cv");
3922 case Expr::CXXFunctionalCastExprClass: {
3923 auto *Sub = cast<ExplicitCastExpr>(E)->getSubExpr()->IgnoreImplicit();
3924 // FIXME: Add isImplicit to CXXConstructExpr.
3925 if (auto *CCE = dyn_cast<CXXConstructExpr>(Sub))
3926 if (CCE->getParenOrBraceRange().isInvalid())
3927 Sub = CCE->getArg(0)->IgnoreImplicit();
3928 if (auto *StdInitList = dyn_cast<CXXStdInitializerListExpr>(Sub))
3929 Sub = StdInitList->getSubExpr()->IgnoreImplicit();
3930 if (auto *IL = dyn_cast<InitListExpr>(Sub)) {
3932 mangleType(E->getType());
3933 mangleInitListElements(IL);
3936 mangleCastExpression(E, "cv");
3941 case Expr::CXXStaticCastExprClass:
3942 mangleCastExpression(E, "sc");
3944 case Expr::CXXDynamicCastExprClass:
3945 mangleCastExpression(E, "dc");
3947 case Expr::CXXReinterpretCastExprClass:
3948 mangleCastExpression(E, "rc");
3950 case Expr::CXXConstCastExprClass:
3951 mangleCastExpression(E, "cc");
3954 case Expr::CXXOperatorCallExprClass: {
3955 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E);
3956 unsigned NumArgs = CE->getNumArgs();
3957 // A CXXOperatorCallExpr for OO_Arrow models only semantics, not syntax
3958 // (the enclosing MemberExpr covers the syntactic portion).
3959 if (CE->getOperator() != OO_Arrow)
3960 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs);
3961 // Mangle the arguments.
3962 for (unsigned i = 0; i != NumArgs; ++i)
3963 mangleExpression(CE->getArg(i));
3967 case Expr::ParenExprClass:
3968 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity);
3971 case Expr::DeclRefExprClass: {
3972 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl();
3974 switch (D->getKind()) {
3976 // <expr-primary> ::= L <mangled-name> E # external name
3983 mangleFunctionParam(cast<ParmVarDecl>(D));
3986 case Decl::EnumConstant: {
3987 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D);
3988 mangleIntegerLiteral(ED->getType(), ED->getInitVal());
3992 case Decl::NonTypeTemplateParm: {
3993 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D);
3994 mangleTemplateParameter(PD->getIndex());
4003 case Expr::SubstNonTypeTemplateParmPackExprClass:
4004 // FIXME: not clear how to mangle this!
4005 // template <unsigned N...> class A {
4006 // template <class U...> void foo(U (&x)[N]...);
4008 Out << "_SUBSTPACK_";
4011 case Expr::FunctionParmPackExprClass: {
4012 // FIXME: not clear how to mangle this!
4013 const FunctionParmPackExpr *FPPE = cast<FunctionParmPackExpr>(E);
4014 Out << "v110_SUBSTPACK";
4015 mangleFunctionParam(FPPE->getParameterPack());
4019 case Expr::DependentScopeDeclRefExprClass: {
4020 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E);
4021 mangleUnresolvedName(DRE->getQualifier(), DRE->getDeclName(),
4022 DRE->getTemplateArgs(), DRE->getNumTemplateArgs(),
4027 case Expr::CXXBindTemporaryExprClass:
4028 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr());
4031 case Expr::ExprWithCleanupsClass:
4032 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity);
4035 case Expr::FloatingLiteralClass: {
4036 const FloatingLiteral *FL = cast<FloatingLiteral>(E);
4038 mangleType(FL->getType());
4039 mangleFloat(FL->getValue());
4044 case Expr::CharacterLiteralClass:
4046 mangleType(E->getType());
4047 Out << cast<CharacterLiteral>(E)->getValue();
4051 // FIXME. __objc_yes/__objc_no are mangled same as true/false
4052 case Expr::ObjCBoolLiteralExprClass:
4054 Out << (cast<ObjCBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4058 case Expr::CXXBoolLiteralExprClass:
4060 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4064 case Expr::IntegerLiteralClass: {
4065 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue());
4066 if (E->getType()->isSignedIntegerType())
4067 Value.setIsSigned(true);
4068 mangleIntegerLiteral(E->getType(), Value);
4072 case Expr::ImaginaryLiteralClass: {
4073 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E);
4074 // Mangle as if a complex literal.
4075 // Proposal from David Vandevoorde, 2010.06.30.
4077 mangleType(E->getType());
4078 if (const FloatingLiteral *Imag =
4079 dyn_cast<FloatingLiteral>(IE->getSubExpr())) {
4080 // Mangle a floating-point zero of the appropriate type.
4081 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics()));
4083 mangleFloat(Imag->getValue());
4086 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue());
4087 if (IE->getSubExpr()->getType()->isSignedIntegerType())
4088 Value.setIsSigned(true);
4089 mangleNumber(Value);
4095 case Expr::StringLiteralClass: {
4096 // Revised proposal from David Vandervoorde, 2010.07.15.
4098 assert(isa<ConstantArrayType>(E->getType()));
4099 mangleType(E->getType());
4104 case Expr::GNUNullExprClass:
4105 // FIXME: should this really be mangled the same as nullptr?
4108 case Expr::CXXNullPtrLiteralExprClass: {
4113 case Expr::PackExpansionExprClass:
4115 mangleExpression(cast<PackExpansionExpr>(E)->getPattern());
4118 case Expr::SizeOfPackExprClass: {
4119 auto *SPE = cast<SizeOfPackExpr>(E);
4120 if (SPE->isPartiallySubstituted()) {
4122 for (const auto &A : SPE->getPartialArguments())
4123 mangleTemplateArg(A);
4129 const NamedDecl *Pack = SPE->getPack();
4130 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack))
4131 mangleTemplateParameter(TTP->getIndex());
4132 else if (const NonTypeTemplateParmDecl *NTTP
4133 = dyn_cast<NonTypeTemplateParmDecl>(Pack))
4134 mangleTemplateParameter(NTTP->getIndex());
4135 else if (const TemplateTemplateParmDecl *TempTP
4136 = dyn_cast<TemplateTemplateParmDecl>(Pack))
4137 mangleTemplateParameter(TempTP->getIndex());
4139 mangleFunctionParam(cast<ParmVarDecl>(Pack));
4143 case Expr::MaterializeTemporaryExprClass: {
4144 mangleExpression(cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr());
4148 case Expr::CXXFoldExprClass: {
4149 auto *FE = cast<CXXFoldExpr>(E);
4150 if (FE->isLeftFold())
4151 Out << (FE->getInit() ? "fL" : "fl");
4153 Out << (FE->getInit() ? "fR" : "fr");
4155 if (FE->getOperator() == BO_PtrMemD)
4159 BinaryOperator::getOverloadedOperator(FE->getOperator()),
4163 mangleExpression(FE->getLHS());
4165 mangleExpression(FE->getRHS());
4169 case Expr::CXXThisExprClass:
4173 case Expr::CoawaitExprClass:
4174 // FIXME: Propose a non-vendor mangling.
4175 Out << "v18co_await";
4176 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4179 case Expr::DependentCoawaitExprClass:
4180 // FIXME: Propose a non-vendor mangling.
4181 Out << "v18co_await";
4182 mangleExpression(cast<DependentCoawaitExpr>(E)->getOperand());
4185 case Expr::CoyieldExprClass:
4186 // FIXME: Propose a non-vendor mangling.
4187 Out << "v18co_yield";
4188 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4193 /// Mangle an expression which refers to a parameter variable.
4195 /// <expression> ::= <function-param>
4196 /// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0
4197 /// <function-param> ::= fp <top-level CV-qualifiers>
4198 /// <parameter-2 non-negative number> _ # L == 0, I > 0
4199 /// <function-param> ::= fL <L-1 non-negative number>
4200 /// p <top-level CV-qualifiers> _ # L > 0, I == 0
4201 /// <function-param> ::= fL <L-1 non-negative number>
4202 /// p <top-level CV-qualifiers>
4203 /// <I-1 non-negative number> _ # L > 0, I > 0
4205 /// L is the nesting depth of the parameter, defined as 1 if the
4206 /// parameter comes from the innermost function prototype scope
4207 /// enclosing the current context, 2 if from the next enclosing
4208 /// function prototype scope, and so on, with one special case: if
4209 /// we've processed the full parameter clause for the innermost
4210 /// function type, then L is one less. This definition conveniently
4211 /// makes it irrelevant whether a function's result type was written
4212 /// trailing or leading, but is otherwise overly complicated; the
4213 /// numbering was first designed without considering references to
4214 /// parameter in locations other than return types, and then the
4215 /// mangling had to be generalized without changing the existing
4218 /// I is the zero-based index of the parameter within its parameter
4219 /// declaration clause. Note that the original ABI document describes
4220 /// this using 1-based ordinals.
4221 void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) {
4222 unsigned parmDepth = parm->getFunctionScopeDepth();
4223 unsigned parmIndex = parm->getFunctionScopeIndex();
4226 // parmDepth does not include the declaring function prototype.
4227 // FunctionTypeDepth does account for that.
4228 assert(parmDepth < FunctionTypeDepth.getDepth());
4229 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth;
4230 if (FunctionTypeDepth.isInResultType())
4233 if (nestingDepth == 0) {
4236 Out << "fL" << (nestingDepth - 1) << 'p';
4239 // Top-level qualifiers. We don't have to worry about arrays here,
4240 // because parameters declared as arrays should already have been
4241 // transformed to have pointer type. FIXME: apparently these don't
4242 // get mangled if used as an rvalue of a known non-class type?
4243 assert(!parm->getType()->isArrayType()
4244 && "parameter's type is still an array type?");
4246 if (const DependentAddressSpaceType *DAST =
4247 dyn_cast<DependentAddressSpaceType>(parm->getType())) {
4248 mangleQualifiers(DAST->getPointeeType().getQualifiers(), DAST);
4250 mangleQualifiers(parm->getType().getQualifiers());
4254 if (parmIndex != 0) {
4255 Out << (parmIndex - 1);
4260 void CXXNameMangler::mangleCXXCtorType(CXXCtorType T,
4261 const CXXRecordDecl *InheritedFrom) {
4262 // <ctor-dtor-name> ::= C1 # complete object constructor
4263 // ::= C2 # base object constructor
4264 // ::= CI1 <type> # complete inheriting constructor
4265 // ::= CI2 <type> # base inheriting constructor
4267 // In addition, C5 is a comdat name with C1 and C2 in it.
4281 case Ctor_DefaultClosure:
4282 case Ctor_CopyingClosure:
4283 llvm_unreachable("closure constructors don't exist for the Itanium ABI!");
4286 mangleName(InheritedFrom);
4289 void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
4290 // <ctor-dtor-name> ::= D0 # deleting destructor
4291 // ::= D1 # complete object destructor
4292 // ::= D2 # base object destructor
4294 // In addition, D5 is a comdat name with D1, D2 and, if virtual, D0 in it.
4311 void CXXNameMangler::mangleTemplateArgs(const TemplateArgumentLoc *TemplateArgs,
4312 unsigned NumTemplateArgs) {
4313 // <template-args> ::= I <template-arg>+ E
4315 for (unsigned i = 0; i != NumTemplateArgs; ++i)
4316 mangleTemplateArg(TemplateArgs[i].getArgument());
4320 void CXXNameMangler::mangleTemplateArgs(const TemplateArgumentList &AL) {
4321 // <template-args> ::= I <template-arg>+ E
4323 for (unsigned i = 0, e = AL.size(); i != e; ++i)
4324 mangleTemplateArg(AL[i]);
4328 void CXXNameMangler::mangleTemplateArgs(const TemplateArgument *TemplateArgs,
4329 unsigned NumTemplateArgs) {
4330 // <template-args> ::= I <template-arg>+ E
4332 for (unsigned i = 0; i != NumTemplateArgs; ++i)
4333 mangleTemplateArg(TemplateArgs[i]);
4337 void CXXNameMangler::mangleTemplateArg(TemplateArgument A) {
4338 // <template-arg> ::= <type> # type or template
4339 // ::= X <expression> E # expression
4340 // ::= <expr-primary> # simple expressions
4341 // ::= J <template-arg>* E # argument pack
4342 if (!A.isInstantiationDependent() || A.isDependent())
4343 A = Context.getASTContext().getCanonicalTemplateArgument(A);
4345 switch (A.getKind()) {
4346 case TemplateArgument::Null:
4347 llvm_unreachable("Cannot mangle NULL template argument");
4349 case TemplateArgument::Type:
4350 mangleType(A.getAsType());
4352 case TemplateArgument::Template:
4353 // This is mangled as <type>.
4354 mangleType(A.getAsTemplate());
4356 case TemplateArgument::TemplateExpansion:
4357 // <type> ::= Dp <type> # pack expansion (C++0x)
4359 mangleType(A.getAsTemplateOrTemplatePattern());
4361 case TemplateArgument::Expression: {
4362 // It's possible to end up with a DeclRefExpr here in certain
4363 // dependent cases, in which case we should mangle as a
4365 const Expr *E = A.getAsExpr()->IgnoreParens();
4366 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
4367 const ValueDecl *D = DRE->getDecl();
4368 if (isa<VarDecl>(D) || isa<FunctionDecl>(D)) {
4377 mangleExpression(E);
4381 case TemplateArgument::Integral:
4382 mangleIntegerLiteral(A.getIntegralType(), A.getAsIntegral());
4384 case TemplateArgument::Declaration: {
4385 // <expr-primary> ::= L <mangled-name> E # external name
4386 // Clang produces AST's where pointer-to-member-function expressions
4387 // and pointer-to-function expressions are represented as a declaration not
4388 // an expression. We compensate for it here to produce the correct mangling.
4389 ValueDecl *D = A.getAsDecl();
4390 bool compensateMangling = !A.getParamTypeForDecl()->isReferenceType();
4391 if (compensateMangling) {
4393 mangleOperatorName(OO_Amp, 1);
4397 // References to external entities use the mangled name; if the name would
4398 // not normally be mangled then mangle it as unqualified.
4402 if (compensateMangling)
4407 case TemplateArgument::NullPtr: {
4408 // <expr-primary> ::= L <type> 0 E
4410 mangleType(A.getNullPtrType());
4414 case TemplateArgument::Pack: {
4415 // <template-arg> ::= J <template-arg>* E
4417 for (const auto &P : A.pack_elements())
4418 mangleTemplateArg(P);
4424 void CXXNameMangler::mangleTemplateParameter(unsigned Index) {
4425 // <template-param> ::= T_ # first template parameter
4426 // ::= T <parameter-2 non-negative number> _
4430 Out << 'T' << (Index - 1) << '_';
4433 void CXXNameMangler::mangleSeqID(unsigned SeqID) {
4436 else if (SeqID > 1) {
4439 // <seq-id> is encoded in base-36, using digits and upper case letters.
4440 char Buffer[7]; // log(2**32) / log(36) ~= 7
4441 MutableArrayRef<char> BufferRef(Buffer);
4442 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
4444 for (; SeqID != 0; SeqID /= 36) {
4445 unsigned C = SeqID % 36;
4446 *I++ = (C < 10 ? '0' + C : 'A' + C - 10);
4449 Out.write(I.base(), I - BufferRef.rbegin());
4454 void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) {
4455 bool result = mangleSubstitution(tname);
4456 assert(result && "no existing substitution for template name");
4460 // <substitution> ::= S <seq-id> _
4462 bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) {
4463 // Try one of the standard substitutions first.
4464 if (mangleStandardSubstitution(ND))
4467 ND = cast<NamedDecl>(ND->getCanonicalDecl());
4468 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND));
4471 /// Determine whether the given type has any qualifiers that are relevant for
4473 static bool hasMangledSubstitutionQualifiers(QualType T) {
4474 Qualifiers Qs = T.getQualifiers();
4475 return Qs.getCVRQualifiers() || Qs.hasAddressSpace() || Qs.hasUnaligned();
4478 bool CXXNameMangler::mangleSubstitution(QualType T) {
4479 if (!hasMangledSubstitutionQualifiers(T)) {
4480 if (const RecordType *RT = T->getAs<RecordType>())
4481 return mangleSubstitution(RT->getDecl());
4484 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
4486 return mangleSubstitution(TypePtr);
4489 bool CXXNameMangler::mangleSubstitution(TemplateName Template) {
4490 if (TemplateDecl *TD = Template.getAsTemplateDecl())
4491 return mangleSubstitution(TD);
4493 Template = Context.getASTContext().getCanonicalTemplateName(Template);
4494 return mangleSubstitution(
4495 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer()));
4498 bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) {
4499 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr);
4500 if (I == Substitutions.end())
4503 unsigned SeqID = I->second;
4510 static bool isCharType(QualType T) {
4514 return T->isSpecificBuiltinType(BuiltinType::Char_S) ||
4515 T->isSpecificBuiltinType(BuiltinType::Char_U);
4518 /// Returns whether a given type is a template specialization of a given name
4519 /// with a single argument of type char.
4520 static bool isCharSpecialization(QualType T, const char *Name) {
4524 const RecordType *RT = T->getAs<RecordType>();
4528 const ClassTemplateSpecializationDecl *SD =
4529 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl());
4533 if (!isStdNamespace(getEffectiveDeclContext(SD)))
4536 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
4537 if (TemplateArgs.size() != 1)
4540 if (!isCharType(TemplateArgs[0].getAsType()))
4543 return SD->getIdentifier()->getName() == Name;
4546 template <std::size_t StrLen>
4547 static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD,
4548 const char (&Str)[StrLen]) {
4549 if (!SD->getIdentifier()->isStr(Str))
4552 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
4553 if (TemplateArgs.size() != 2)
4556 if (!isCharType(TemplateArgs[0].getAsType()))
4559 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
4565 bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) {
4566 // <substitution> ::= St # ::std::
4567 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
4574 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) {
4575 if (!isStdNamespace(getEffectiveDeclContext(TD)))
4578 // <substitution> ::= Sa # ::std::allocator
4579 if (TD->getIdentifier()->isStr("allocator")) {
4584 // <<substitution> ::= Sb # ::std::basic_string
4585 if (TD->getIdentifier()->isStr("basic_string")) {
4591 if (const ClassTemplateSpecializationDecl *SD =
4592 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
4593 if (!isStdNamespace(getEffectiveDeclContext(SD)))
4596 // <substitution> ::= Ss # ::std::basic_string<char,
4597 // ::std::char_traits<char>,
4598 // ::std::allocator<char> >
4599 if (SD->getIdentifier()->isStr("basic_string")) {
4600 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
4602 if (TemplateArgs.size() != 3)
4605 if (!isCharType(TemplateArgs[0].getAsType()))
4608 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
4611 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator"))
4618 // <substitution> ::= Si # ::std::basic_istream<char,
4619 // ::std::char_traits<char> >
4620 if (isStreamCharSpecialization(SD, "basic_istream")) {
4625 // <substitution> ::= So # ::std::basic_ostream<char,
4626 // ::std::char_traits<char> >
4627 if (isStreamCharSpecialization(SD, "basic_ostream")) {
4632 // <substitution> ::= Sd # ::std::basic_iostream<char,
4633 // ::std::char_traits<char> >
4634 if (isStreamCharSpecialization(SD, "basic_iostream")) {
4642 void CXXNameMangler::addSubstitution(QualType T) {
4643 if (!hasMangledSubstitutionQualifiers(T)) {
4644 if (const RecordType *RT = T->getAs<RecordType>()) {
4645 addSubstitution(RT->getDecl());
4650 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
4651 addSubstitution(TypePtr);
4654 void CXXNameMangler::addSubstitution(TemplateName Template) {
4655 if (TemplateDecl *TD = Template.getAsTemplateDecl())
4656 return addSubstitution(TD);
4658 Template = Context.getASTContext().getCanonicalTemplateName(Template);
4659 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer()));
4662 void CXXNameMangler::addSubstitution(uintptr_t Ptr) {
4663 assert(!Substitutions.count(Ptr) && "Substitution already exists!");
4664 Substitutions[Ptr] = SeqID++;
4667 void CXXNameMangler::extendSubstitutions(CXXNameMangler* Other) {
4668 assert(Other->SeqID >= SeqID && "Must be superset of substitutions!");
4669 if (Other->SeqID > SeqID) {
4670 Substitutions.swap(Other->Substitutions);
4671 SeqID = Other->SeqID;
4675 CXXNameMangler::AbiTagList
4676 CXXNameMangler::makeFunctionReturnTypeTags(const FunctionDecl *FD) {
4677 // When derived abi tags are disabled there is no need to make any list.
4678 if (DisableDerivedAbiTags)
4679 return AbiTagList();
4681 llvm::raw_null_ostream NullOutStream;
4682 CXXNameMangler TrackReturnTypeTags(*this, NullOutStream);
4683 TrackReturnTypeTags.disableDerivedAbiTags();
4685 const FunctionProtoType *Proto =
4686 cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>());
4687 FunctionTypeDepthState saved = TrackReturnTypeTags.FunctionTypeDepth.push();
4688 TrackReturnTypeTags.FunctionTypeDepth.enterResultType();
4689 TrackReturnTypeTags.mangleType(Proto->getReturnType());
4690 TrackReturnTypeTags.FunctionTypeDepth.leaveResultType();
4691 TrackReturnTypeTags.FunctionTypeDepth.pop(saved);
4693 return TrackReturnTypeTags.AbiTagsRoot.getSortedUniqueUsedAbiTags();
4696 CXXNameMangler::AbiTagList
4697 CXXNameMangler::makeVariableTypeTags(const VarDecl *VD) {
4698 // When derived abi tags are disabled there is no need to make any list.
4699 if (DisableDerivedAbiTags)
4700 return AbiTagList();
4702 llvm::raw_null_ostream NullOutStream;
4703 CXXNameMangler TrackVariableType(*this, NullOutStream);
4704 TrackVariableType.disableDerivedAbiTags();
4706 TrackVariableType.mangleType(VD->getType());
4708 return TrackVariableType.AbiTagsRoot.getSortedUniqueUsedAbiTags();
4711 bool CXXNameMangler::shouldHaveAbiTags(ItaniumMangleContextImpl &C,
4712 const VarDecl *VD) {
4713 llvm::raw_null_ostream NullOutStream;
4714 CXXNameMangler TrackAbiTags(C, NullOutStream, nullptr, true);
4715 TrackAbiTags.mangle(VD);
4716 return TrackAbiTags.AbiTagsRoot.getUsedAbiTags().size();
4721 /// Mangles the name of the declaration D and emits that name to the given
4724 /// If the declaration D requires a mangled name, this routine will emit that
4725 /// mangled name to \p os and return true. Otherwise, \p os will be unchanged
4726 /// and this routine will return false. In this case, the caller should just
4727 /// emit the identifier of the declaration (\c D->getIdentifier()) as its
4729 void ItaniumMangleContextImpl::mangleCXXName(const NamedDecl *D,
4731 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
4732 "Invalid mangleName() call, argument is not a variable or function!");
4733 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
4734 "Invalid mangleName() call on 'structor decl!");
4736 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
4737 getASTContext().getSourceManager(),
4738 "Mangling declaration");
4740 CXXNameMangler Mangler(*this, Out, D);
4744 void ItaniumMangleContextImpl::mangleCXXCtor(const CXXConstructorDecl *D,
4747 CXXNameMangler Mangler(*this, Out, D, Type);
4751 void ItaniumMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
4754 CXXNameMangler Mangler(*this, Out, D, Type);
4758 void ItaniumMangleContextImpl::mangleCXXCtorComdat(const CXXConstructorDecl *D,
4760 CXXNameMangler Mangler(*this, Out, D, Ctor_Comdat);
4764 void ItaniumMangleContextImpl::mangleCXXDtorComdat(const CXXDestructorDecl *D,
4766 CXXNameMangler Mangler(*this, Out, D, Dtor_Comdat);
4770 void ItaniumMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
4771 const ThunkInfo &Thunk,
4773 // <special-name> ::= T <call-offset> <base encoding>
4774 // # base is the nominal target function of thunk
4775 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding>
4776 // # base is the nominal target function of thunk
4777 // # first call-offset is 'this' adjustment
4778 // # second call-offset is result adjustment
4780 assert(!isa<CXXDestructorDecl>(MD) &&
4781 "Use mangleCXXDtor for destructor decls!");
4782 CXXNameMangler Mangler(*this, Out);
4783 Mangler.getStream() << "_ZT";
4784 if (!Thunk.Return.isEmpty())
4785 Mangler.getStream() << 'c';
4787 // Mangle the 'this' pointer adjustment.
4788 Mangler.mangleCallOffset(Thunk.This.NonVirtual,
4789 Thunk.This.Virtual.Itanium.VCallOffsetOffset);
4791 // Mangle the return pointer adjustment if there is one.
4792 if (!Thunk.Return.isEmpty())
4793 Mangler.mangleCallOffset(Thunk.Return.NonVirtual,
4794 Thunk.Return.Virtual.Itanium.VBaseOffsetOffset);
4796 Mangler.mangleFunctionEncoding(MD);
4799 void ItaniumMangleContextImpl::mangleCXXDtorThunk(
4800 const CXXDestructorDecl *DD, CXXDtorType Type,
4801 const ThisAdjustment &ThisAdjustment, raw_ostream &Out) {
4802 // <special-name> ::= T <call-offset> <base encoding>
4803 // # base is the nominal target function of thunk
4804 CXXNameMangler Mangler(*this, Out, DD, Type);
4805 Mangler.getStream() << "_ZT";
4807 // Mangle the 'this' pointer adjustment.
4808 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual,
4809 ThisAdjustment.Virtual.Itanium.VCallOffsetOffset);
4811 Mangler.mangleFunctionEncoding(DD);
4814 /// Returns the mangled name for a guard variable for the passed in VarDecl.
4815 void ItaniumMangleContextImpl::mangleStaticGuardVariable(const VarDecl *D,
4817 // <special-name> ::= GV <object name> # Guard variable for one-time
4819 CXXNameMangler Mangler(*this, Out);
4820 // GCC 5.3.0 doesn't emit derived ABI tags for local names but that seems to
4821 // be a bug that is fixed in trunk.
4822 Mangler.getStream() << "_ZGV";
4823 Mangler.mangleName(D);
4826 void ItaniumMangleContextImpl::mangleDynamicInitializer(const VarDecl *MD,
4828 // These symbols are internal in the Itanium ABI, so the names don't matter.
4829 // Clang has traditionally used this symbol and allowed LLVM to adjust it to
4830 // avoid duplicate symbols.
4831 Out << "__cxx_global_var_init";
4834 void ItaniumMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
4836 // Prefix the mangling of D with __dtor_.
4837 CXXNameMangler Mangler(*this, Out);
4838 Mangler.getStream() << "__dtor_";
4839 if (shouldMangleDeclName(D))
4842 Mangler.getStream() << D->getName();
4845 void ItaniumMangleContextImpl::mangleSEHFilterExpression(
4846 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
4847 CXXNameMangler Mangler(*this, Out);
4848 Mangler.getStream() << "__filt_";
4849 if (shouldMangleDeclName(EnclosingDecl))
4850 Mangler.mangle(EnclosingDecl);
4852 Mangler.getStream() << EnclosingDecl->getName();
4855 void ItaniumMangleContextImpl::mangleSEHFinallyBlock(
4856 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
4857 CXXNameMangler Mangler(*this, Out);
4858 Mangler.getStream() << "__fin_";
4859 if (shouldMangleDeclName(EnclosingDecl))
4860 Mangler.mangle(EnclosingDecl);
4862 Mangler.getStream() << EnclosingDecl->getName();
4865 void ItaniumMangleContextImpl::mangleItaniumThreadLocalInit(const VarDecl *D,
4867 // <special-name> ::= TH <object name>
4868 CXXNameMangler Mangler(*this, Out);
4869 Mangler.getStream() << "_ZTH";
4870 Mangler.mangleName(D);
4874 ItaniumMangleContextImpl::mangleItaniumThreadLocalWrapper(const VarDecl *D,
4876 // <special-name> ::= TW <object name>
4877 CXXNameMangler Mangler(*this, Out);
4878 Mangler.getStream() << "_ZTW";
4879 Mangler.mangleName(D);
4882 void ItaniumMangleContextImpl::mangleReferenceTemporary(const VarDecl *D,
4883 unsigned ManglingNumber,
4885 // We match the GCC mangling here.
4886 // <special-name> ::= GR <object name>
4887 CXXNameMangler Mangler(*this, Out);
4888 Mangler.getStream() << "_ZGR";
4889 Mangler.mangleName(D);
4890 assert(ManglingNumber > 0 && "Reference temporary mangling number is zero!");
4891 Mangler.mangleSeqID(ManglingNumber - 1);
4894 void ItaniumMangleContextImpl::mangleCXXVTable(const CXXRecordDecl *RD,
4896 // <special-name> ::= TV <type> # virtual table
4897 CXXNameMangler Mangler(*this, Out);
4898 Mangler.getStream() << "_ZTV";
4899 Mangler.mangleNameOrStandardSubstitution(RD);
4902 void ItaniumMangleContextImpl::mangleCXXVTT(const CXXRecordDecl *RD,
4904 // <special-name> ::= TT <type> # VTT structure
4905 CXXNameMangler Mangler(*this, Out);
4906 Mangler.getStream() << "_ZTT";
4907 Mangler.mangleNameOrStandardSubstitution(RD);
4910 void ItaniumMangleContextImpl::mangleCXXCtorVTable(const CXXRecordDecl *RD,
4912 const CXXRecordDecl *Type,
4914 // <special-name> ::= TC <type> <offset number> _ <base type>
4915 CXXNameMangler Mangler(*this, Out);
4916 Mangler.getStream() << "_ZTC";
4917 Mangler.mangleNameOrStandardSubstitution(RD);
4918 Mangler.getStream() << Offset;
4919 Mangler.getStream() << '_';
4920 Mangler.mangleNameOrStandardSubstitution(Type);
4923 void ItaniumMangleContextImpl::mangleCXXRTTI(QualType Ty, raw_ostream &Out) {
4924 // <special-name> ::= TI <type> # typeinfo structure
4925 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers");
4926 CXXNameMangler Mangler(*this, Out);
4927 Mangler.getStream() << "_ZTI";
4928 Mangler.mangleType(Ty);
4931 void ItaniumMangleContextImpl::mangleCXXRTTIName(QualType Ty,
4933 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string)
4934 CXXNameMangler Mangler(*this, Out);
4935 Mangler.getStream() << "_ZTS";
4936 Mangler.mangleType(Ty);
4939 void ItaniumMangleContextImpl::mangleTypeName(QualType Ty, raw_ostream &Out) {
4940 mangleCXXRTTIName(Ty, Out);
4943 void ItaniumMangleContextImpl::mangleStringLiteral(const StringLiteral *, raw_ostream &) {
4944 llvm_unreachable("Can't mangle string literals");
4947 ItaniumMangleContext *
4948 ItaniumMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
4949 return new ItaniumMangleContextImpl(Context, Diags);