1 //===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This provides C++ name mangling targeting the Microsoft Visual C++ ABI.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/Mangle.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/CharUnits.h"
19 #include "clang/AST/Decl.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclObjC.h"
22 #include "clang/AST/DeclOpenMP.h"
23 #include "clang/AST/DeclTemplate.h"
24 #include "clang/AST/Expr.h"
25 #include "clang/AST/ExprCXX.h"
26 #include "clang/AST/VTableBuilder.h"
27 #include "clang/Basic/ABI.h"
28 #include "clang/Basic/DiagnosticOptions.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/Support/JamCRC.h"
32 #include "llvm/Support/MD5.h"
33 #include "llvm/Support/MathExtras.h"
35 using namespace clang;
39 struct msvc_hashing_ostream : public llvm::raw_svector_ostream {
41 llvm::SmallString<64> Buffer;
43 msvc_hashing_ostream(raw_ostream &OS)
44 : llvm::raw_svector_ostream(Buffer), OS(OS) {}
45 ~msvc_hashing_ostream() override {
46 StringRef MangledName = str();
47 bool StartsWithEscape = MangledName.startswith("\01");
49 MangledName = MangledName.drop_front(1);
50 if (MangledName.size() <= 4096) {
56 llvm::MD5::MD5Result Hash;
57 Hasher.update(MangledName);
60 SmallString<32> HexString;
61 llvm::MD5::stringifyResult(Hash, HexString);
65 OS << "??@" << HexString << '@';
69 static const DeclContext *
70 getLambdaDefaultArgumentDeclContext(const Decl *D) {
71 if (const auto *RD = dyn_cast<CXXRecordDecl>(D))
73 if (const auto *Parm =
74 dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
75 return Parm->getDeclContext();
79 /// \brief Retrieve the declaration context that should be used when mangling
80 /// the given declaration.
81 static const DeclContext *getEffectiveDeclContext(const Decl *D) {
82 // The ABI assumes that lambda closure types that occur within
83 // default arguments live in the context of the function. However, due to
84 // the way in which Clang parses and creates function declarations, this is
85 // not the case: the lambda closure type ends up living in the context
86 // where the function itself resides, because the function declaration itself
87 // had not yet been created. Fix the context here.
88 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(D))
91 // Perform the same check for block literals.
92 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
93 if (ParmVarDecl *ContextParam =
94 dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
95 return ContextParam->getDeclContext();
98 const DeclContext *DC = D->getDeclContext();
99 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC)) {
100 return getEffectiveDeclContext(cast<Decl>(DC));
103 return DC->getRedeclContext();
106 static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
107 return getEffectiveDeclContext(cast<Decl>(DC));
110 static const FunctionDecl *getStructor(const NamedDecl *ND) {
111 if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(ND))
112 return FTD->getTemplatedDecl()->getCanonicalDecl();
114 const auto *FD = cast<FunctionDecl>(ND);
115 if (const auto *FTD = FD->getPrimaryTemplate())
116 return FTD->getTemplatedDecl()->getCanonicalDecl();
118 return FD->getCanonicalDecl();
121 /// MicrosoftMangleContextImpl - Overrides the default MangleContext for the
122 /// Microsoft Visual C++ ABI.
123 class MicrosoftMangleContextImpl : public MicrosoftMangleContext {
124 typedef std::pair<const DeclContext *, IdentifierInfo *> DiscriminatorKeyTy;
125 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
126 llvm::DenseMap<const NamedDecl *, unsigned> Uniquifier;
127 llvm::DenseMap<const CXXRecordDecl *, unsigned> LambdaIds;
128 llvm::DenseMap<const NamedDecl *, unsigned> SEHFilterIds;
129 llvm::DenseMap<const NamedDecl *, unsigned> SEHFinallyIds;
132 MicrosoftMangleContextImpl(ASTContext &Context, DiagnosticsEngine &Diags)
133 : MicrosoftMangleContext(Context, Diags) {}
134 bool shouldMangleCXXName(const NamedDecl *D) override;
135 bool shouldMangleStringLiteral(const StringLiteral *SL) override;
136 void mangleCXXName(const NamedDecl *D, raw_ostream &Out) override;
137 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
138 raw_ostream &) override;
139 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
140 raw_ostream &) override;
141 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
142 const ThisAdjustment &ThisAdjustment,
143 raw_ostream &) override;
144 void mangleCXXVFTable(const CXXRecordDecl *Derived,
145 ArrayRef<const CXXRecordDecl *> BasePath,
146 raw_ostream &Out) override;
147 void mangleCXXVBTable(const CXXRecordDecl *Derived,
148 ArrayRef<const CXXRecordDecl *> BasePath,
149 raw_ostream &Out) override;
150 void mangleCXXVirtualDisplacementMap(const CXXRecordDecl *SrcRD,
151 const CXXRecordDecl *DstRD,
152 raw_ostream &Out) override;
153 void mangleCXXThrowInfo(QualType T, bool IsConst, bool IsVolatile,
154 bool IsUnaligned, uint32_t NumEntries,
155 raw_ostream &Out) override;
156 void mangleCXXCatchableTypeArray(QualType T, uint32_t NumEntries,
157 raw_ostream &Out) override;
158 void mangleCXXCatchableType(QualType T, const CXXConstructorDecl *CD,
159 CXXCtorType CT, uint32_t Size, uint32_t NVOffset,
160 int32_t VBPtrOffset, uint32_t VBIndex,
161 raw_ostream &Out) override;
162 void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
163 void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
164 void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,
165 uint32_t NVOffset, int32_t VBPtrOffset,
166 uint32_t VBTableOffset, uint32_t Flags,
167 raw_ostream &Out) override;
168 void mangleCXXRTTIBaseClassArray(const CXXRecordDecl *Derived,
169 raw_ostream &Out) override;
170 void mangleCXXRTTIClassHierarchyDescriptor(const CXXRecordDecl *Derived,
171 raw_ostream &Out) override;
173 mangleCXXRTTICompleteObjectLocator(const CXXRecordDecl *Derived,
174 ArrayRef<const CXXRecordDecl *> BasePath,
175 raw_ostream &Out) override;
176 void mangleTypeName(QualType T, raw_ostream &) override;
177 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
178 raw_ostream &) override;
179 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
180 raw_ostream &) override;
181 void mangleReferenceTemporary(const VarDecl *, unsigned ManglingNumber,
182 raw_ostream &) override;
183 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &Out) override;
184 void mangleThreadSafeStaticGuardVariable(const VarDecl *D, unsigned GuardNum,
185 raw_ostream &Out) override;
186 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
187 void mangleDynamicAtExitDestructor(const VarDecl *D,
188 raw_ostream &Out) override;
189 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
190 raw_ostream &Out) override;
191 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
192 raw_ostream &Out) override;
193 void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
194 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
195 const DeclContext *DC = getEffectiveDeclContext(ND);
196 if (!DC->isFunctionOrMethod())
199 // Lambda closure types are already numbered, give out a phony number so
200 // that they demangle nicely.
201 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
202 if (RD->isLambda()) {
208 // Use the canonical number for externally visible decls.
209 if (ND->isExternallyVisible()) {
210 disc = getASTContext().getManglingNumber(ND);
214 // Anonymous tags are already numbered.
215 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
216 if (!Tag->hasNameForLinkage() &&
217 !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
218 !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
222 // Make up a reasonable number for internal decls.
223 unsigned &discriminator = Uniquifier[ND];
225 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
226 disc = discriminator + 1;
230 unsigned getLambdaId(const CXXRecordDecl *RD) {
231 assert(RD->isLambda() && "RD must be a lambda!");
232 assert(!RD->isExternallyVisible() && "RD must not be visible!");
233 assert(RD->getLambdaManglingNumber() == 0 &&
234 "RD must not have a mangling number!");
235 std::pair<llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator, bool>
236 Result = LambdaIds.insert(std::make_pair(RD, LambdaIds.size()));
237 return Result.first->second;
241 void mangleInitFiniStub(const VarDecl *D, char CharCode, raw_ostream &Out);
244 /// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
245 /// Microsoft Visual C++ ABI.
246 class MicrosoftCXXNameMangler {
247 MicrosoftMangleContextImpl &Context;
250 /// The "structor" is the top-level declaration being mangled, if
251 /// that's not a template specialization; otherwise it's the pattern
252 /// for that specialization.
253 const NamedDecl *Structor;
254 unsigned StructorType;
256 typedef llvm::SmallVector<std::string, 10> BackRefVec;
257 BackRefVec NameBackReferences;
259 typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
260 ArgBackRefMap TypeBackReferences;
262 typedef std::set<int> PassObjectSizeArgsSet;
263 PassObjectSizeArgsSet PassObjectSizeArgs;
265 ASTContext &getASTContext() const { return Context.getASTContext(); }
267 // FIXME: If we add support for __ptr32/64 qualifiers, then we should push
268 // this check into mangleQualifiers().
269 const bool PointersAre64Bit;
272 enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
274 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
275 : Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
276 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
279 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
280 const CXXConstructorDecl *D, CXXCtorType Type)
281 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
282 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
285 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
286 const CXXDestructorDecl *D, CXXDtorType Type)
287 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
288 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
291 raw_ostream &getStream() const { return Out; }
293 void mangle(const NamedDecl *D, StringRef Prefix = "\01?");
294 void mangleName(const NamedDecl *ND);
295 void mangleFunctionEncoding(const FunctionDecl *FD, bool ShouldMangle);
296 void mangleVariableEncoding(const VarDecl *VD);
297 void mangleMemberDataPointer(const CXXRecordDecl *RD, const ValueDecl *VD);
298 void mangleMemberFunctionPointer(const CXXRecordDecl *RD,
299 const CXXMethodDecl *MD);
300 void mangleVirtualMemPtrThunk(
301 const CXXMethodDecl *MD,
302 const MicrosoftVTableContext::MethodVFTableLocation &ML);
303 void mangleNumber(int64_t Number);
304 void mangleTagTypeKind(TagTypeKind TK);
305 void mangleArtificalTagType(TagTypeKind TK, StringRef UnqualifiedName,
306 ArrayRef<StringRef> NestedNames = None);
307 void mangleType(QualType T, SourceRange Range,
308 QualifierMangleMode QMM = QMM_Mangle);
309 void mangleFunctionType(const FunctionType *T,
310 const FunctionDecl *D = nullptr,
311 bool ForceThisQuals = false);
312 void mangleNestedName(const NamedDecl *ND);
315 bool isStructorDecl(const NamedDecl *ND) const {
316 return ND == Structor || getStructor(ND) == Structor;
319 void mangleUnqualifiedName(const NamedDecl *ND) {
320 mangleUnqualifiedName(ND, ND->getDeclName());
322 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
323 void mangleSourceName(StringRef Name);
324 void mangleOperatorName(OverloadedOperatorKind OO, SourceLocation Loc);
325 void mangleCXXDtorType(CXXDtorType T);
326 void mangleQualifiers(Qualifiers Quals, bool IsMember);
327 void mangleRefQualifier(RefQualifierKind RefQualifier);
328 void manglePointerCVQualifiers(Qualifiers Quals);
329 void manglePointerExtQualifiers(Qualifiers Quals, QualType PointeeType);
331 void mangleUnscopedTemplateName(const TemplateDecl *ND);
333 mangleTemplateInstantiationName(const TemplateDecl *TD,
334 const TemplateArgumentList &TemplateArgs);
335 void mangleObjCMethodName(const ObjCMethodDecl *MD);
337 void mangleArgumentType(QualType T, SourceRange Range);
338 void manglePassObjectSizeArg(const PassObjectSizeAttr *POSA);
340 // Declare manglers for every type class.
341 #define ABSTRACT_TYPE(CLASS, PARENT)
342 #define NON_CANONICAL_TYPE(CLASS, PARENT)
343 #define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
346 #include "clang/AST/TypeNodes.def"
348 #undef NON_CANONICAL_TYPE
351 void mangleType(const TagDecl *TD);
352 void mangleDecayedArrayType(const ArrayType *T);
353 void mangleArrayType(const ArrayType *T);
354 void mangleFunctionClass(const FunctionDecl *FD);
355 void mangleCallingConvention(CallingConv CC);
356 void mangleCallingConvention(const FunctionType *T);
357 void mangleIntegerLiteral(const llvm::APSInt &Number, bool IsBoolean);
358 void mangleExpression(const Expr *E);
359 void mangleThrowSpecification(const FunctionProtoType *T);
361 void mangleTemplateArgs(const TemplateDecl *TD,
362 const TemplateArgumentList &TemplateArgs);
363 void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
364 const NamedDecl *Parm);
368 bool MicrosoftMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
369 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
370 LanguageLinkage L = FD->getLanguageLinkage();
371 // Overloadable functions need mangling.
372 if (FD->hasAttr<OverloadableAttr>())
375 // The ABI expects that we would never mangle "typical" user-defined entry
376 // points regardless of visibility or freestanding-ness.
378 // N.B. This is distinct from asking about "main". "main" has a lot of
379 // special rules associated with it in the standard while these
380 // user-defined entry points are outside of the purview of the standard.
381 // For example, there can be only one definition for "main" in a standards
382 // compliant program; however nothing forbids the existence of wmain and
383 // WinMain in the same translation unit.
384 if (FD->isMSVCRTEntryPoint())
387 // C++ functions and those whose names are not a simple identifier need
389 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
392 // C functions are not mangled.
393 if (L == CLanguageLinkage)
397 // Otherwise, no mangling is done outside C++ mode.
398 if (!getASTContext().getLangOpts().CPlusPlus)
401 const VarDecl *VD = dyn_cast<VarDecl>(D);
402 if (VD && !isa<DecompositionDecl>(D)) {
403 // C variables are not mangled.
407 // Variables at global scope with non-internal linkage are not mangled.
408 const DeclContext *DC = getEffectiveDeclContext(D);
409 // Check for extern variable declared locally.
410 if (DC->isFunctionOrMethod() && D->hasLinkage())
411 while (!DC->isNamespace() && !DC->isTranslationUnit())
412 DC = getEffectiveParentContext(DC);
414 if (DC->isTranslationUnit() && D->getFormalLinkage() == InternalLinkage &&
415 !isa<VarTemplateSpecializationDecl>(D) &&
416 D->getIdentifier() != nullptr)
424 MicrosoftMangleContextImpl::shouldMangleStringLiteral(const StringLiteral *SL) {
428 void MicrosoftCXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) {
429 // MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
430 // Therefore it's really important that we don't decorate the
431 // name with leading underscores or leading/trailing at signs. So, by
432 // default, we emit an asm marker at the start so we get the name right.
433 // Callers can override this with a custom prefix.
435 // <mangled-name> ::= ? <name> <type-encoding>
438 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
439 mangleFunctionEncoding(FD, Context.shouldMangleDeclName(FD));
440 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
441 mangleVariableEncoding(VD);
443 llvm_unreachable("Tried to mangle unexpected NamedDecl!");
446 void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
448 // <type-encoding> ::= <function-class> <function-type>
450 // Since MSVC operates on the type as written and not the canonical type, it
451 // actually matters which decl we have here. MSVC appears to choose the
452 // first, since it is most likely to be the declaration in a header file.
453 FD = FD->getFirstDecl();
455 // We should never ever see a FunctionNoProtoType at this point.
456 // We don't even know how to mangle their types anyway :).
457 const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
459 // extern "C" functions can hold entities that must be mangled.
460 // As it stands, these functions still need to get expressed in the full
461 // external name. They have their class and type omitted, replaced with '9'.
463 // We would like to mangle all extern "C" functions using this additional
464 // component but this would break compatibility with MSVC's behavior.
465 // Instead, do this when we know that compatibility isn't important (in
466 // other words, when it is an overloaded extern "C" function).
467 if (FD->isExternC() && FD->hasAttr<OverloadableAttr>())
470 mangleFunctionClass(FD);
472 mangleFunctionType(FT, FD);
478 void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
479 // <type-encoding> ::= <storage-class> <variable-type>
480 // <storage-class> ::= 0 # private static member
481 // ::= 1 # protected static member
482 // ::= 2 # public static member
484 // ::= 4 # static local
486 // The first character in the encoding (after the name) is the storage class.
487 if (VD->isStaticDataMember()) {
488 // If it's a static member, it also encodes the access level.
489 switch (VD->getAccess()) {
491 case AS_private: Out << '0'; break;
492 case AS_protected: Out << '1'; break;
493 case AS_public: Out << '2'; break;
496 else if (!VD->isStaticLocal())
500 // Now mangle the type.
501 // <variable-type> ::= <type> <cvr-qualifiers>
502 // ::= <type> <pointee-cvr-qualifiers> # pointers, references
503 // Pointers and references are odd. The type of 'int * const foo;' gets
504 // mangled as 'QAHA' instead of 'PAHB', for example.
505 SourceRange SR = VD->getSourceRange();
506 QualType Ty = VD->getType();
507 if (Ty->isPointerType() || Ty->isReferenceType() ||
508 Ty->isMemberPointerType()) {
509 mangleType(Ty, SR, QMM_Drop);
510 manglePointerExtQualifiers(
511 Ty.getDesugaredType(getASTContext()).getLocalQualifiers(), QualType());
512 if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()) {
513 mangleQualifiers(MPT->getPointeeType().getQualifiers(), true);
514 // Member pointers are suffixed with a back reference to the member
515 // pointer's class name.
516 mangleName(MPT->getClass()->getAsCXXRecordDecl());
518 mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
519 } else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
520 // Global arrays are funny, too.
521 mangleDecayedArrayType(AT);
522 if (AT->getElementType()->isArrayType())
525 mangleQualifiers(Ty.getQualifiers(), false);
527 mangleType(Ty, SR, QMM_Drop);
528 mangleQualifiers(Ty.getQualifiers(), false);
532 void MicrosoftCXXNameMangler::mangleMemberDataPointer(const CXXRecordDecl *RD,
533 const ValueDecl *VD) {
534 // <member-data-pointer> ::= <integer-literal>
535 // ::= $F <number> <number>
536 // ::= $G <number> <number> <number>
539 int64_t VBTableOffset;
540 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
542 FieldOffset = getASTContext().getFieldOffset(VD);
543 assert(FieldOffset % getASTContext().getCharWidth() == 0 &&
544 "cannot take address of bitfield");
545 FieldOffset /= getASTContext().getCharWidth();
549 if (IM == MSInheritanceAttr::Keyword_virtual_inheritance)
550 FieldOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
552 FieldOffset = RD->nullFieldOffsetIsZero() ? 0 : -1;
559 case MSInheritanceAttr::Keyword_single_inheritance: Code = '0'; break;
560 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = '0'; break;
561 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'F'; break;
562 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'G'; break;
567 mangleNumber(FieldOffset);
569 // The C++ standard doesn't allow base-to-derived member pointer conversions
570 // in template parameter contexts, so the vbptr offset of data member pointers
572 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
574 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
575 mangleNumber(VBTableOffset);
579 MicrosoftCXXNameMangler::mangleMemberFunctionPointer(const CXXRecordDecl *RD,
580 const CXXMethodDecl *MD) {
581 // <member-function-pointer> ::= $1? <name>
582 // ::= $H? <name> <number>
583 // ::= $I? <name> <number> <number>
584 // ::= $J? <name> <number> <number> <number>
586 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
590 case MSInheritanceAttr::Keyword_single_inheritance: Code = '1'; break;
591 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = 'H'; break;
592 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'I'; break;
593 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'J'; break;
596 // If non-virtual, mangle the name. If virtual, mangle as a virtual memptr
598 uint64_t NVOffset = 0;
599 uint64_t VBTableOffset = 0;
600 uint64_t VBPtrOffset = 0;
602 Out << '$' << Code << '?';
603 if (MD->isVirtual()) {
604 MicrosoftVTableContext *VTContext =
605 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
606 const MicrosoftVTableContext::MethodVFTableLocation &ML =
607 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
608 mangleVirtualMemPtrThunk(MD, ML);
609 NVOffset = ML.VFPtrOffset.getQuantity();
610 VBTableOffset = ML.VBTableIndex * 4;
612 const ASTRecordLayout &Layout = getASTContext().getASTRecordLayout(RD);
613 VBPtrOffset = Layout.getVBPtrOffset().getQuantity();
617 mangleFunctionEncoding(MD, /*ShouldMangle=*/true);
620 if (VBTableOffset == 0 &&
621 IM == MSInheritanceAttr::Keyword_virtual_inheritance)
622 NVOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
624 // Null single inheritance member functions are encoded as a simple nullptr.
625 if (IM == MSInheritanceAttr::Keyword_single_inheritance) {
629 if (IM == MSInheritanceAttr::Keyword_unspecified_inheritance)
634 if (MSInheritanceAttr::hasNVOffsetField(/*IsMemberFunction=*/true, IM))
635 mangleNumber(static_cast<uint32_t>(NVOffset));
636 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
637 mangleNumber(VBPtrOffset);
638 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
639 mangleNumber(VBTableOffset);
642 void MicrosoftCXXNameMangler::mangleVirtualMemPtrThunk(
643 const CXXMethodDecl *MD,
644 const MicrosoftVTableContext::MethodVFTableLocation &ML) {
645 // Get the vftable offset.
646 CharUnits PointerWidth = getASTContext().toCharUnitsFromBits(
647 getASTContext().getTargetInfo().getPointerWidth(0));
648 uint64_t OffsetInVFTable = ML.Index * PointerWidth.getQuantity();
651 mangleName(MD->getParent());
653 mangleNumber(OffsetInVFTable);
655 mangleCallingConvention(MD->getType()->getAs<FunctionProtoType>());
658 void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
659 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
661 // Always start with the unqualified name.
662 mangleUnqualifiedName(ND);
664 mangleNestedName(ND);
666 // Terminate the whole name with an '@'.
670 void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
671 // <non-negative integer> ::= A@ # when Number == 0
672 // ::= <decimal digit> # when 1 <= Number <= 10
673 // ::= <hex digit>+ @ # when Number >= 10
675 // <number> ::= [?] <non-negative integer>
677 uint64_t Value = static_cast<uint64_t>(Number);
685 else if (Value >= 1 && Value <= 10)
688 // Numbers that are not encoded as decimal digits are represented as nibbles
689 // in the range of ASCII characters 'A' to 'P'.
690 // The number 0x123450 would be encoded as 'BCDEFA'
691 char EncodedNumberBuffer[sizeof(uint64_t) * 2];
692 MutableArrayRef<char> BufferRef(EncodedNumberBuffer);
693 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
694 for (; Value != 0; Value >>= 4)
695 *I++ = 'A' + (Value & 0xf);
696 Out.write(I.base(), I - BufferRef.rbegin());
701 static const TemplateDecl *
702 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
703 // Check if we have a function template.
704 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
705 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
706 TemplateArgs = FD->getTemplateSpecializationArgs();
711 // Check if we have a class template.
712 if (const ClassTemplateSpecializationDecl *Spec =
713 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
714 TemplateArgs = &Spec->getTemplateArgs();
715 return Spec->getSpecializedTemplate();
718 // Check if we have a variable template.
719 if (const VarTemplateSpecializationDecl *Spec =
720 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
721 TemplateArgs = &Spec->getTemplateArgs();
722 return Spec->getSpecializedTemplate();
728 void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
729 DeclarationName Name) {
730 // <unqualified-name> ::= <operator-name>
731 // ::= <ctor-dtor-name>
733 // ::= <template-name>
735 // Check if we have a template.
736 const TemplateArgumentList *TemplateArgs = nullptr;
737 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
738 // Function templates aren't considered for name back referencing. This
739 // makes sense since function templates aren't likely to occur multiple
740 // times in a symbol.
741 if (isa<FunctionTemplateDecl>(TD)) {
742 mangleTemplateInstantiationName(TD, *TemplateArgs);
747 // Here comes the tricky thing: if we need to mangle something like
748 // void foo(A::X<Y>, B::X<Y>),
749 // the X<Y> part is aliased. However, if you need to mangle
750 // void foo(A::X<A::Y>, A::X<B::Y>),
751 // the A::X<> part is not aliased.
752 // That said, from the mangler's perspective we have a structure like this:
753 // namespace[s] -> type[ -> template-parameters]
754 // but from the Clang perspective we have
755 // type [ -> template-parameters]
757 // What we do is we create a new mangler, mangle the same type (without
758 // a namespace suffix) to a string using the extra mangler and then use
759 // the mangled type name as a key to check the mangling of different types
762 llvm::SmallString<64> TemplateMangling;
763 llvm::raw_svector_ostream Stream(TemplateMangling);
764 MicrosoftCXXNameMangler Extra(Context, Stream);
765 Extra.mangleTemplateInstantiationName(TD, *TemplateArgs);
767 mangleSourceName(TemplateMangling);
771 switch (Name.getNameKind()) {
772 case DeclarationName::Identifier: {
773 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
774 mangleSourceName(II->getName());
778 // Otherwise, an anonymous entity. We must have a declaration.
779 assert(ND && "mangling empty name without declaration");
781 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
782 if (NS->isAnonymousNamespace()) {
788 if (const DecompositionDecl *DD = dyn_cast<DecompositionDecl>(ND)) {
789 // FIXME: Invented mangling for decomposition declarations:
791 // where X,Y,Z are the names of the bindings.
792 llvm::SmallString<128> Name("[");
793 for (auto *BD : DD->bindings()) {
796 Name += BD->getDeclName().getAsIdentifierInfo()->getName();
799 mangleSourceName(Name);
803 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
804 // We must have an anonymous union or struct declaration.
805 const CXXRecordDecl *RD = VD->getType()->getAsCXXRecordDecl();
806 assert(RD && "expected variable decl to have a record type");
807 // Anonymous types with no tag or typedef get the name of their
808 // declarator mangled in. If they have no declarator, number them with
810 llvm::SmallString<64> Name("$S");
811 // Get a unique id for the anonymous struct.
812 Name += llvm::utostr(Context.getAnonymousStructId(RD) + 1);
813 mangleSourceName(Name.str());
817 // We must have an anonymous struct.
818 const TagDecl *TD = cast<TagDecl>(ND);
819 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
820 assert(TD->getDeclContext() == D->getDeclContext() &&
821 "Typedef should not be in another decl context!");
822 assert(D->getDeclName().getAsIdentifierInfo() &&
823 "Typedef was not named!");
824 mangleSourceName(D->getDeclName().getAsIdentifierInfo()->getName());
828 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
829 if (Record->isLambda()) {
830 llvm::SmallString<10> Name("<lambda_");
832 Decl *LambdaContextDecl = Record->getLambdaContextDecl();
833 unsigned LambdaManglingNumber = Record->getLambdaManglingNumber();
835 const ParmVarDecl *Parm =
836 dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
837 const FunctionDecl *Func =
838 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
841 unsigned DefaultArgNo =
842 Func->getNumParams() - Parm->getFunctionScopeIndex();
843 Name += llvm::utostr(DefaultArgNo);
847 if (LambdaManglingNumber)
848 LambdaId = LambdaManglingNumber;
850 LambdaId = Context.getLambdaId(Record);
852 Name += llvm::utostr(LambdaId);
855 mangleSourceName(Name);
857 // If the context of a closure type is an initializer for a class
858 // member (static or nonstatic), it is encoded in a qualified name.
859 if (LambdaManglingNumber && LambdaContextDecl) {
860 if ((isa<VarDecl>(LambdaContextDecl) ||
861 isa<FieldDecl>(LambdaContextDecl)) &&
862 LambdaContextDecl->getDeclContext()->isRecord()) {
863 mangleUnqualifiedName(cast<NamedDecl>(LambdaContextDecl));
870 llvm::SmallString<64> Name;
871 if (DeclaratorDecl *DD =
872 Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
873 // Anonymous types without a name for linkage purposes have their
874 // declarator mangled in if they have one.
875 Name += "<unnamed-type-";
876 Name += DD->getName();
877 } else if (TypedefNameDecl *TND =
878 Context.getASTContext().getTypedefNameForUnnamedTagDecl(
880 // Anonymous types without a name for linkage purposes have their
881 // associate typedef mangled in if they have one.
882 Name += "<unnamed-type-";
883 Name += TND->getName();
884 } else if (auto *ED = dyn_cast<EnumDecl>(TD)) {
885 auto EnumeratorI = ED->enumerator_begin();
886 assert(EnumeratorI != ED->enumerator_end());
887 Name += "<unnamed-enum-";
888 Name += EnumeratorI->getName();
890 // Otherwise, number the types using a $S prefix.
891 Name += "<unnamed-type-$S";
892 Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
895 mangleSourceName(Name.str());
899 case DeclarationName::ObjCZeroArgSelector:
900 case DeclarationName::ObjCOneArgSelector:
901 case DeclarationName::ObjCMultiArgSelector:
902 llvm_unreachable("Can't mangle Objective-C selector names here!");
904 case DeclarationName::CXXConstructorName:
905 if (isStructorDecl(ND)) {
906 if (StructorType == Ctor_CopyingClosure) {
910 if (StructorType == Ctor_DefaultClosure) {
918 case DeclarationName::CXXDestructorName:
919 if (isStructorDecl(ND))
920 // If the named decl is the C++ destructor we're mangling,
921 // use the type we were given.
922 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
924 // Otherwise, use the base destructor name. This is relevant if a
925 // class with a destructor is declared within a destructor.
926 mangleCXXDtorType(Dtor_Base);
929 case DeclarationName::CXXConversionFunctionName:
930 // <operator-name> ::= ?B # (cast)
931 // The target type is encoded as the return type.
935 case DeclarationName::CXXOperatorName:
936 mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
939 case DeclarationName::CXXLiteralOperatorName: {
941 mangleSourceName(Name.getCXXLiteralIdentifier()->getName());
945 case DeclarationName::CXXDeductionGuideName:
946 llvm_unreachable("Can't mangle a deduction guide name!");
948 case DeclarationName::CXXUsingDirective:
949 llvm_unreachable("Can't mangle a using directive name!");
953 // <postfix> ::= <unqualified-name> [<postfix>]
954 // ::= <substitution> [<postfix>]
955 void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
956 const DeclContext *DC = getEffectiveDeclContext(ND);
957 while (!DC->isTranslationUnit()) {
958 if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
960 if (Context.getNextDiscriminator(ND, Disc)) {
967 if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
969 [](StringRef Name, const unsigned Discriminator,
970 const unsigned ParameterDiscriminator) -> std::string {
972 llvm::raw_string_ostream Stream(Buffer);
975 Stream << '_' << Discriminator;
976 if (ParameterDiscriminator)
977 Stream << '_' << ParameterDiscriminator;
981 unsigned Discriminator = BD->getBlockManglingNumber();
983 Discriminator = Context.getBlockId(BD, /*Local=*/false);
985 // Mangle the parameter position as a discriminator to deal with unnamed
986 // parameters. Rather than mangling the unqualified parameter name,
987 // always use the position to give a uniform mangling.
988 unsigned ParameterDiscriminator = 0;
989 if (const auto *MC = BD->getBlockManglingContextDecl())
990 if (const auto *P = dyn_cast<ParmVarDecl>(MC))
991 if (const auto *F = dyn_cast<FunctionDecl>(P->getDeclContext()))
992 ParameterDiscriminator =
993 F->getNumParams() - P->getFunctionScopeIndex();
995 DC = getEffectiveDeclContext(BD);
998 mangleSourceName(Discriminate("_block_invoke", Discriminator,
999 ParameterDiscriminator));
1000 // If we have a block mangling context, encode that now. This allows us
1001 // to discriminate between named static data initializers in the same
1002 // scope. This is handled differently from parameters, which use
1003 // positions to discriminate between multiple instances.
1004 if (const auto *MC = BD->getBlockManglingContextDecl())
1005 if (!isa<ParmVarDecl>(MC))
1006 if (const auto *ND = dyn_cast<NamedDecl>(MC))
1007 mangleUnqualifiedName(ND);
1008 // MS ABI and Itanium manglings are in inverted scopes. In the case of a
1009 // RecordDecl, mangle the entire scope hierachy at this point rather than
1010 // just the unqualified name to get the ordering correct.
1011 if (const auto *RD = dyn_cast<RecordDecl>(DC))
1017 // struct __block_literal *
1020 if (PointersAre64Bit)
1023 mangleArtificalTagType(TTK_Struct,
1024 Discriminate("__block_literal", Discriminator,
1025 ParameterDiscriminator));
1028 // If the effective context was a Record, we have fully mangled the
1029 // qualified name and do not need to continue.
1030 if (isa<RecordDecl>(DC))
1033 } else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
1034 mangleObjCMethodName(Method);
1035 } else if (isa<NamedDecl>(DC)) {
1036 ND = cast<NamedDecl>(DC);
1037 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1041 mangleUnqualifiedName(ND);
1042 // Lambdas in default arguments conceptually belong to the function the
1043 // parameter corresponds to.
1044 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(ND)) {
1050 DC = DC->getParent();
1054 void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
1055 // Microsoft uses the names on the case labels for these dtor variants. Clang
1056 // uses the Itanium terminology internally. Everything in this ABI delegates
1057 // towards the base dtor.
1059 // <operator-name> ::= ?1 # destructor
1060 case Dtor_Base: Out << "?1"; return;
1061 // <operator-name> ::= ?_D # vbase destructor
1062 case Dtor_Complete: Out << "?_D"; return;
1063 // <operator-name> ::= ?_G # scalar deleting destructor
1064 case Dtor_Deleting: Out << "?_G"; return;
1065 // <operator-name> ::= ?_E # vector deleting destructor
1066 // FIXME: Add a vector deleting dtor type. It goes in the vtable, so we need
1069 llvm_unreachable("not expecting a COMDAT");
1071 llvm_unreachable("Unsupported dtor type?");
1074 void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
1075 SourceLocation Loc) {
1079 // <operator-name> ::= ?2 # new
1080 case OO_New: Out << "?2"; break;
1081 // <operator-name> ::= ?3 # delete
1082 case OO_Delete: Out << "?3"; break;
1083 // <operator-name> ::= ?4 # =
1084 case OO_Equal: Out << "?4"; break;
1085 // <operator-name> ::= ?5 # >>
1086 case OO_GreaterGreater: Out << "?5"; break;
1087 // <operator-name> ::= ?6 # <<
1088 case OO_LessLess: Out << "?6"; break;
1089 // <operator-name> ::= ?7 # !
1090 case OO_Exclaim: Out << "?7"; break;
1091 // <operator-name> ::= ?8 # ==
1092 case OO_EqualEqual: Out << "?8"; break;
1093 // <operator-name> ::= ?9 # !=
1094 case OO_ExclaimEqual: Out << "?9"; break;
1095 // <operator-name> ::= ?A # []
1096 case OO_Subscript: Out << "?A"; break;
1098 // <operator-name> ::= ?C # ->
1099 case OO_Arrow: Out << "?C"; break;
1100 // <operator-name> ::= ?D # *
1101 case OO_Star: Out << "?D"; break;
1102 // <operator-name> ::= ?E # ++
1103 case OO_PlusPlus: Out << "?E"; break;
1104 // <operator-name> ::= ?F # --
1105 case OO_MinusMinus: Out << "?F"; break;
1106 // <operator-name> ::= ?G # -
1107 case OO_Minus: Out << "?G"; break;
1108 // <operator-name> ::= ?H # +
1109 case OO_Plus: Out << "?H"; break;
1110 // <operator-name> ::= ?I # &
1111 case OO_Amp: Out << "?I"; break;
1112 // <operator-name> ::= ?J # ->*
1113 case OO_ArrowStar: Out << "?J"; break;
1114 // <operator-name> ::= ?K # /
1115 case OO_Slash: Out << "?K"; break;
1116 // <operator-name> ::= ?L # %
1117 case OO_Percent: Out << "?L"; break;
1118 // <operator-name> ::= ?M # <
1119 case OO_Less: Out << "?M"; break;
1120 // <operator-name> ::= ?N # <=
1121 case OO_LessEqual: Out << "?N"; break;
1122 // <operator-name> ::= ?O # >
1123 case OO_Greater: Out << "?O"; break;
1124 // <operator-name> ::= ?P # >=
1125 case OO_GreaterEqual: Out << "?P"; break;
1126 // <operator-name> ::= ?Q # ,
1127 case OO_Comma: Out << "?Q"; break;
1128 // <operator-name> ::= ?R # ()
1129 case OO_Call: Out << "?R"; break;
1130 // <operator-name> ::= ?S # ~
1131 case OO_Tilde: Out << "?S"; break;
1132 // <operator-name> ::= ?T # ^
1133 case OO_Caret: Out << "?T"; break;
1134 // <operator-name> ::= ?U # |
1135 case OO_Pipe: Out << "?U"; break;
1136 // <operator-name> ::= ?V # &&
1137 case OO_AmpAmp: Out << "?V"; break;
1138 // <operator-name> ::= ?W # ||
1139 case OO_PipePipe: Out << "?W"; break;
1140 // <operator-name> ::= ?X # *=
1141 case OO_StarEqual: Out << "?X"; break;
1142 // <operator-name> ::= ?Y # +=
1143 case OO_PlusEqual: Out << "?Y"; break;
1144 // <operator-name> ::= ?Z # -=
1145 case OO_MinusEqual: Out << "?Z"; break;
1146 // <operator-name> ::= ?_0 # /=
1147 case OO_SlashEqual: Out << "?_0"; break;
1148 // <operator-name> ::= ?_1 # %=
1149 case OO_PercentEqual: Out << "?_1"; break;
1150 // <operator-name> ::= ?_2 # >>=
1151 case OO_GreaterGreaterEqual: Out << "?_2"; break;
1152 // <operator-name> ::= ?_3 # <<=
1153 case OO_LessLessEqual: Out << "?_3"; break;
1154 // <operator-name> ::= ?_4 # &=
1155 case OO_AmpEqual: Out << "?_4"; break;
1156 // <operator-name> ::= ?_5 # |=
1157 case OO_PipeEqual: Out << "?_5"; break;
1158 // <operator-name> ::= ?_6 # ^=
1159 case OO_CaretEqual: Out << "?_6"; break;
1164 // ?_B # local static guard
1166 // ?_D # vbase destructor
1167 // ?_E # vector deleting destructor
1168 // ?_F # default constructor closure
1169 // ?_G # scalar deleting destructor
1170 // ?_H # vector constructor iterator
1171 // ?_I # vector destructor iterator
1172 // ?_J # vector vbase constructor iterator
1173 // ?_K # virtual displacement map
1174 // ?_L # eh vector constructor iterator
1175 // ?_M # eh vector destructor iterator
1176 // ?_N # eh vector vbase constructor iterator
1177 // ?_O # copy constructor closure
1178 // ?_P<name> # udt returning <name>
1180 // ?_R0 # RTTI Type Descriptor
1181 // ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
1182 // ?_R2 # RTTI Base Class Array
1183 // ?_R3 # RTTI Class Hierarchy Descriptor
1184 // ?_R4 # RTTI Complete Object Locator
1185 // ?_S # local vftable
1186 // ?_T # local vftable constructor closure
1187 // <operator-name> ::= ?_U # new[]
1188 case OO_Array_New: Out << "?_U"; break;
1189 // <operator-name> ::= ?_V # delete[]
1190 case OO_Array_Delete: Out << "?_V"; break;
1191 // <operator-name> ::= ?__L # co_await
1192 case OO_Coawait: Out << "?__L"; break;
1194 case OO_Spaceship: {
1195 // FIXME: Once MS picks a mangling, use it.
1196 DiagnosticsEngine &Diags = Context.getDiags();
1197 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1198 "cannot mangle this three-way comparison operator yet");
1199 Diags.Report(Loc, DiagID);
1203 case OO_Conditional: {
1204 DiagnosticsEngine &Diags = Context.getDiags();
1205 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1206 "cannot mangle this conditional operator yet");
1207 Diags.Report(Loc, DiagID);
1212 case NUM_OVERLOADED_OPERATORS:
1213 llvm_unreachable("Not an overloaded operator");
1217 void MicrosoftCXXNameMangler::mangleSourceName(StringRef Name) {
1218 // <source name> ::= <identifier> @
1219 BackRefVec::iterator Found =
1220 std::find(NameBackReferences.begin(), NameBackReferences.end(), Name);
1221 if (Found == NameBackReferences.end()) {
1222 if (NameBackReferences.size() < 10)
1223 NameBackReferences.push_back(Name);
1226 Out << (Found - NameBackReferences.begin());
1230 void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
1231 Context.mangleObjCMethodName(MD, Out);
1234 void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
1235 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1236 // <template-name> ::= <unscoped-template-name> <template-args>
1237 // ::= <substitution>
1238 // Always start with the unqualified name.
1240 // Templates have their own context for back references.
1241 ArgBackRefMap OuterArgsContext;
1242 BackRefVec OuterTemplateContext;
1243 PassObjectSizeArgsSet OuterPassObjectSizeArgs;
1244 NameBackReferences.swap(OuterTemplateContext);
1245 TypeBackReferences.swap(OuterArgsContext);
1246 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1248 mangleUnscopedTemplateName(TD);
1249 mangleTemplateArgs(TD, TemplateArgs);
1251 // Restore the previous back reference contexts.
1252 NameBackReferences.swap(OuterTemplateContext);
1253 TypeBackReferences.swap(OuterArgsContext);
1254 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1258 MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
1259 // <unscoped-template-name> ::= ?$ <unqualified-name>
1261 mangleUnqualifiedName(TD);
1264 void MicrosoftCXXNameMangler::mangleIntegerLiteral(const llvm::APSInt &Value,
1266 // <integer-literal> ::= $0 <number>
1268 // Make sure booleans are encoded as 0/1.
1269 if (IsBoolean && Value.getBoolValue())
1271 else if (Value.isSigned())
1272 mangleNumber(Value.getSExtValue());
1274 mangleNumber(Value.getZExtValue());
1277 void MicrosoftCXXNameMangler::mangleExpression(const Expr *E) {
1278 // See if this is a constant expression.
1280 if (E->isIntegerConstantExpr(Value, Context.getASTContext())) {
1281 mangleIntegerLiteral(Value, E->getType()->isBooleanType());
1285 // Look through no-op casts like template parameter substitutions.
1286 E = E->IgnoreParenNoopCasts(Context.getASTContext());
1288 const CXXUuidofExpr *UE = nullptr;
1289 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
1290 if (UO->getOpcode() == UO_AddrOf)
1291 UE = dyn_cast<CXXUuidofExpr>(UO->getSubExpr());
1293 UE = dyn_cast<CXXUuidofExpr>(E);
1296 // If we had to peek through an address-of operator, treat this like we are
1297 // dealing with a pointer type. Otherwise, treat it like a const reference.
1299 // N.B. This matches up with the handling of TemplateArgument::Declaration
1300 // in mangleTemplateArg
1306 // This CXXUuidofExpr is mangled as-if it were actually a VarDecl from
1307 // const __s_GUID _GUID_{lower case UUID with underscores}
1308 StringRef Uuid = UE->getUuidStr();
1309 std::string Name = "_GUID_" + Uuid.lower();
1310 std::replace(Name.begin(), Name.end(), '-', '_');
1312 mangleSourceName(Name);
1313 // Terminate the whole name with an '@'.
1315 // It's a global variable.
1317 // It's a struct called __s_GUID.
1318 mangleArtificalTagType(TTK_Struct, "__s_GUID");
1324 // As bad as this diagnostic is, it's better than crashing.
1325 DiagnosticsEngine &Diags = Context.getDiags();
1326 unsigned DiagID = Diags.getCustomDiagID(
1327 DiagnosticsEngine::Error, "cannot yet mangle expression type %0");
1328 Diags.Report(E->getExprLoc(), DiagID) << E->getStmtClassName()
1329 << E->getSourceRange();
1332 void MicrosoftCXXNameMangler::mangleTemplateArgs(
1333 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1334 // <template-args> ::= <template-arg>+
1335 const TemplateParameterList *TPL = TD->getTemplateParameters();
1336 assert(TPL->size() == TemplateArgs.size() &&
1337 "size mismatch between args and parms!");
1340 for (const TemplateArgument &TA : TemplateArgs.asArray())
1341 mangleTemplateArg(TD, TA, TPL->getParam(Idx++));
1344 void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
1345 const TemplateArgument &TA,
1346 const NamedDecl *Parm) {
1347 // <template-arg> ::= <type>
1348 // ::= <integer-literal>
1349 // ::= <member-data-pointer>
1350 // ::= <member-function-pointer>
1351 // ::= $E? <name> <type-encoding>
1352 // ::= $1? <name> <type-encoding>
1354 // ::= <template-args>
1356 switch (TA.getKind()) {
1357 case TemplateArgument::Null:
1358 llvm_unreachable("Can't mangle null template arguments!");
1359 case TemplateArgument::TemplateExpansion:
1360 llvm_unreachable("Can't mangle template expansion arguments!");
1361 case TemplateArgument::Type: {
1362 QualType T = TA.getAsType();
1363 mangleType(T, SourceRange(), QMM_Escape);
1366 case TemplateArgument::Declaration: {
1367 const NamedDecl *ND = cast<NamedDecl>(TA.getAsDecl());
1368 if (isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND)) {
1369 mangleMemberDataPointer(
1370 cast<CXXRecordDecl>(ND->getDeclContext())->getMostRecentDecl(),
1371 cast<ValueDecl>(ND));
1372 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1373 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1374 if (MD && MD->isInstance()) {
1375 mangleMemberFunctionPointer(MD->getParent()->getMostRecentDecl(), MD);
1379 mangleFunctionEncoding(FD, /*ShouldMangle=*/true);
1382 mangle(ND, TA.getParamTypeForDecl()->isReferenceType() ? "$E?" : "$1?");
1386 case TemplateArgument::Integral:
1387 mangleIntegerLiteral(TA.getAsIntegral(),
1388 TA.getIntegralType()->isBooleanType());
1390 case TemplateArgument::NullPtr: {
1391 QualType T = TA.getNullPtrType();
1392 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
1393 const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
1394 if (MPT->isMemberFunctionPointerType() &&
1395 !isa<FunctionTemplateDecl>(TD)) {
1396 mangleMemberFunctionPointer(RD, nullptr);
1399 if (MPT->isMemberDataPointer()) {
1400 if (!isa<FunctionTemplateDecl>(TD)) {
1401 mangleMemberDataPointer(RD, nullptr);
1404 // nullptr data pointers are always represented with a single field
1405 // which is initialized with either 0 or -1. Why -1? Well, we need to
1406 // distinguish the case where the data member is at offset zero in the
1408 // However, we are free to use 0 *if* we would use multiple fields for
1409 // non-nullptr member pointers.
1410 if (!RD->nullFieldOffsetIsZero()) {
1411 mangleIntegerLiteral(llvm::APSInt::get(-1), /*IsBoolean=*/false);
1416 mangleIntegerLiteral(llvm::APSInt::getUnsigned(0), /*IsBoolean=*/false);
1419 case TemplateArgument::Expression:
1420 mangleExpression(TA.getAsExpr());
1422 case TemplateArgument::Pack: {
1423 ArrayRef<TemplateArgument> TemplateArgs = TA.getPackAsArray();
1424 if (TemplateArgs.empty()) {
1425 if (isa<TemplateTypeParmDecl>(Parm) ||
1426 isa<TemplateTemplateParmDecl>(Parm))
1427 // MSVC 2015 changed the mangling for empty expanded template packs,
1428 // use the old mangling for link compatibility for old versions.
1429 Out << (Context.getASTContext().getLangOpts().isCompatibleWithMSVC(
1430 LangOptions::MSVC2015)
1433 else if (isa<NonTypeTemplateParmDecl>(Parm))
1436 llvm_unreachable("unexpected template parameter decl!");
1438 for (const TemplateArgument &PA : TemplateArgs)
1439 mangleTemplateArg(TD, PA, Parm);
1443 case TemplateArgument::Template: {
1444 const NamedDecl *ND =
1445 TA.getAsTemplate().getAsTemplateDecl()->getTemplatedDecl();
1446 if (const auto *TD = dyn_cast<TagDecl>(ND)) {
1448 } else if (isa<TypeAliasDecl>(ND)) {
1452 llvm_unreachable("unexpected template template NamedDecl!");
1459 void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
1461 // <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
1462 // 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
1463 // 'I' means __restrict (32/64-bit).
1464 // Note that the MSVC __restrict keyword isn't the same as the C99 restrict
1466 // <base-cvr-qualifiers> ::= A # near
1467 // ::= B # near const
1468 // ::= C # near volatile
1469 // ::= D # near const volatile
1470 // ::= E # far (16-bit)
1471 // ::= F # far const (16-bit)
1472 // ::= G # far volatile (16-bit)
1473 // ::= H # far const volatile (16-bit)
1474 // ::= I # huge (16-bit)
1475 // ::= J # huge const (16-bit)
1476 // ::= K # huge volatile (16-bit)
1477 // ::= L # huge const volatile (16-bit)
1478 // ::= M <basis> # based
1479 // ::= N <basis> # based const
1480 // ::= O <basis> # based volatile
1481 // ::= P <basis> # based const volatile
1482 // ::= Q # near member
1483 // ::= R # near const member
1484 // ::= S # near volatile member
1485 // ::= T # near const volatile member
1486 // ::= U # far member (16-bit)
1487 // ::= V # far const member (16-bit)
1488 // ::= W # far volatile member (16-bit)
1489 // ::= X # far const volatile member (16-bit)
1490 // ::= Y # huge member (16-bit)
1491 // ::= Z # huge const member (16-bit)
1492 // ::= 0 # huge volatile member (16-bit)
1493 // ::= 1 # huge const volatile member (16-bit)
1494 // ::= 2 <basis> # based member
1495 // ::= 3 <basis> # based const member
1496 // ::= 4 <basis> # based volatile member
1497 // ::= 5 <basis> # based const volatile member
1498 // ::= 6 # near function (pointers only)
1499 // ::= 7 # far function (pointers only)
1500 // ::= 8 # near method (pointers only)
1501 // ::= 9 # far method (pointers only)
1502 // ::= _A <basis> # based function (pointers only)
1503 // ::= _B <basis> # based function (far?) (pointers only)
1504 // ::= _C <basis> # based method (pointers only)
1505 // ::= _D <basis> # based method (far?) (pointers only)
1506 // ::= _E # block (Clang)
1507 // <basis> ::= 0 # __based(void)
1508 // ::= 1 # __based(segment)?
1509 // ::= 2 <name> # __based(name)
1512 // ::= 5 # not really based
1513 bool HasConst = Quals.hasConst(),
1514 HasVolatile = Quals.hasVolatile();
1517 if (HasConst && HasVolatile) {
1519 } else if (HasVolatile) {
1521 } else if (HasConst) {
1527 if (HasConst && HasVolatile) {
1529 } else if (HasVolatile) {
1531 } else if (HasConst) {
1538 // FIXME: For now, just drop all extension qualifiers on the floor.
1542 MicrosoftCXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
1543 // <ref-qualifier> ::= G # lvalue reference
1544 // ::= H # rvalue-reference
1545 switch (RefQualifier) {
1559 void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
1560 QualType PointeeType) {
1561 bool HasRestrict = Quals.hasRestrict();
1562 if (PointersAre64Bit &&
1563 (PointeeType.isNull() || !PointeeType->isFunctionType()))
1569 if (Quals.hasUnaligned() ||
1570 (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned()))
1574 void MicrosoftCXXNameMangler::manglePointerCVQualifiers(Qualifiers Quals) {
1575 // <pointer-cv-qualifiers> ::= P # no qualifiers
1578 // ::= S # const volatile
1579 bool HasConst = Quals.hasConst(),
1580 HasVolatile = Quals.hasVolatile();
1582 if (HasConst && HasVolatile) {
1584 } else if (HasVolatile) {
1586 } else if (HasConst) {
1593 void MicrosoftCXXNameMangler::mangleArgumentType(QualType T,
1594 SourceRange Range) {
1595 // MSVC will backreference two canonically equivalent types that have slightly
1596 // different manglings when mangled alone.
1598 // Decayed types do not match up with non-decayed versions of the same type.
1601 // void (*x)(void) will not form a backreference with void x(void)
1603 if (const auto *DT = T->getAs<DecayedType>()) {
1604 QualType OriginalType = DT->getOriginalType();
1605 // All decayed ArrayTypes should be treated identically; as-if they were
1606 // a decayed IncompleteArrayType.
1607 if (const auto *AT = getASTContext().getAsArrayType(OriginalType))
1608 OriginalType = getASTContext().getIncompleteArrayType(
1609 AT->getElementType(), AT->getSizeModifier(),
1610 AT->getIndexTypeCVRQualifiers());
1612 TypePtr = OriginalType.getCanonicalType().getAsOpaquePtr();
1613 // If the original parameter was textually written as an array,
1614 // instead treat the decayed parameter like it's const.
1617 // int [] -> int * const
1618 if (OriginalType->isArrayType())
1621 TypePtr = T.getCanonicalType().getAsOpaquePtr();
1624 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1626 if (Found == TypeBackReferences.end()) {
1627 size_t OutSizeBefore = Out.tell();
1629 mangleType(T, Range, QMM_Drop);
1631 // See if it's worth creating a back reference.
1632 // Only types longer than 1 character are considered
1633 // and only 10 back references slots are available:
1634 bool LongerThanOneChar = (Out.tell() - OutSizeBefore > 1);
1635 if (LongerThanOneChar && TypeBackReferences.size() < 10) {
1636 size_t Size = TypeBackReferences.size();
1637 TypeBackReferences[TypePtr] = Size;
1640 Out << Found->second;
1644 void MicrosoftCXXNameMangler::manglePassObjectSizeArg(
1645 const PassObjectSizeAttr *POSA) {
1646 int Type = POSA->getType();
1648 auto Iter = PassObjectSizeArgs.insert(Type).first;
1649 auto *TypePtr = (const void *)&*Iter;
1650 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1652 if (Found == TypeBackReferences.end()) {
1653 mangleArtificalTagType(TTK_Enum, "__pass_object_size" + llvm::utostr(Type),
1656 if (TypeBackReferences.size() < 10) {
1657 size_t Size = TypeBackReferences.size();
1658 TypeBackReferences[TypePtr] = Size;
1661 Out << Found->second;
1665 void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
1666 QualifierMangleMode QMM) {
1667 // Don't use the canonical types. MSVC includes things like 'const' on
1668 // pointer arguments to function pointers that canonicalization strips away.
1669 T = T.getDesugaredType(getASTContext());
1670 Qualifiers Quals = T.getLocalQualifiers();
1671 if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
1672 // If there were any Quals, getAsArrayType() pushed them onto the array
1674 if (QMM == QMM_Mangle)
1676 else if (QMM == QMM_Escape || QMM == QMM_Result)
1678 mangleArrayType(AT);
1682 bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
1683 T->isReferenceType() || T->isBlockPointerType();
1689 if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
1691 mangleFunctionType(FT);
1694 mangleQualifiers(Quals, false);
1697 if (!IsPointer && Quals) {
1699 mangleQualifiers(Quals, false);
1703 // Presence of __unaligned qualifier shouldn't affect mangling here.
1704 Quals.removeUnaligned();
1705 if ((!IsPointer && Quals) || isa<TagType>(T)) {
1707 mangleQualifiers(Quals, false);
1712 const Type *ty = T.getTypePtr();
1714 switch (ty->getTypeClass()) {
1715 #define ABSTRACT_TYPE(CLASS, PARENT)
1716 #define NON_CANONICAL_TYPE(CLASS, PARENT) \
1718 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
1720 #define TYPE(CLASS, PARENT) \
1722 mangleType(cast<CLASS##Type>(ty), Quals, Range); \
1724 #include "clang/AST/TypeNodes.def"
1725 #undef ABSTRACT_TYPE
1726 #undef NON_CANONICAL_TYPE
1731 void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T, Qualifiers,
1732 SourceRange Range) {
1733 // <type> ::= <builtin-type>
1734 // <builtin-type> ::= X # void
1735 // ::= C # signed char
1737 // ::= E # unsigned char
1739 // ::= G # unsigned short (or wchar_t if it's not a builtin)
1741 // ::= I # unsigned int
1743 // ::= K # unsigned long
1747 // ::= O # long double (__float80 is mangled differently)
1748 // ::= _J # long long, __int64
1749 // ::= _K # unsigned long long, __int64
1750 // ::= _L # __int128
1751 // ::= _M # unsigned __int128
1753 // _O # <array in parameter>
1754 // ::= _T # __float80 (Intel)
1755 // ::= _S # char16_t
1756 // ::= _U # char32_t
1758 // ::= _Z # __float80 (Digital Mars)
1759 switch (T->getKind()) {
1760 case BuiltinType::Void:
1763 case BuiltinType::SChar:
1766 case BuiltinType::Char_U:
1767 case BuiltinType::Char_S:
1770 case BuiltinType::UChar:
1773 case BuiltinType::Short:
1776 case BuiltinType::UShort:
1779 case BuiltinType::Int:
1782 case BuiltinType::UInt:
1785 case BuiltinType::Long:
1788 case BuiltinType::ULong:
1791 case BuiltinType::Float:
1794 case BuiltinType::Double:
1797 // TODO: Determine size and mangle accordingly
1798 case BuiltinType::LongDouble:
1801 case BuiltinType::LongLong:
1804 case BuiltinType::ULongLong:
1807 case BuiltinType::Int128:
1810 case BuiltinType::UInt128:
1813 case BuiltinType::Bool:
1816 case BuiltinType::Char16:
1819 case BuiltinType::Char32:
1822 case BuiltinType::WChar_S:
1823 case BuiltinType::WChar_U:
1827 #define BUILTIN_TYPE(Id, SingletonId)
1828 #define PLACEHOLDER_TYPE(Id, SingletonId) \
1829 case BuiltinType::Id:
1830 #include "clang/AST/BuiltinTypes.def"
1831 case BuiltinType::Dependent:
1832 llvm_unreachable("placeholder types shouldn't get to name mangling");
1834 case BuiltinType::ObjCId:
1836 mangleArtificalTagType(TTK_Struct, "objc_object");
1838 case BuiltinType::ObjCClass:
1840 mangleArtificalTagType(TTK_Struct, "objc_class");
1842 case BuiltinType::ObjCSel:
1844 mangleArtificalTagType(TTK_Struct, "objc_selector");
1847 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
1848 case BuiltinType::Id: \
1849 Out << "PAUocl_" #ImgType "_" #Suffix "@@"; \
1851 #include "clang/Basic/OpenCLImageTypes.def"
1852 case BuiltinType::OCLSampler:
1854 mangleArtificalTagType(TTK_Struct, "ocl_sampler");
1856 case BuiltinType::OCLEvent:
1858 mangleArtificalTagType(TTK_Struct, "ocl_event");
1860 case BuiltinType::OCLClkEvent:
1862 mangleArtificalTagType(TTK_Struct, "ocl_clkevent");
1864 case BuiltinType::OCLQueue:
1866 mangleArtificalTagType(TTK_Struct, "ocl_queue");
1868 case BuiltinType::OCLReserveID:
1870 mangleArtificalTagType(TTK_Struct, "ocl_reserveid");
1873 case BuiltinType::NullPtr:
1877 case BuiltinType::Float16:
1878 case BuiltinType::Float128:
1879 case BuiltinType::Half: {
1880 DiagnosticsEngine &Diags = Context.getDiags();
1881 unsigned DiagID = Diags.getCustomDiagID(
1882 DiagnosticsEngine::Error, "cannot mangle this built-in %0 type yet");
1883 Diags.Report(Range.getBegin(), DiagID)
1884 << T->getName(Context.getASTContext().getPrintingPolicy()) << Range;
1890 // <type> ::= <function-type>
1891 void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T, Qualifiers,
1893 // Structors only appear in decls, so at this point we know it's not a
1895 // FIXME: This may not be lambda-friendly.
1896 if (T->getTypeQuals() || T->getRefQualifier() != RQ_None) {
1898 mangleFunctionType(T, /*D=*/nullptr, /*ForceThisQuals=*/true);
1901 mangleFunctionType(T);
1904 void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
1905 Qualifiers, SourceRange) {
1907 mangleFunctionType(T);
1910 void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
1911 const FunctionDecl *D,
1912 bool ForceThisQuals) {
1913 // <function-type> ::= <this-cvr-qualifiers> <calling-convention>
1914 // <return-type> <argument-list> <throw-spec>
1915 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
1918 if (D) Range = D->getSourceRange();
1920 bool IsInLambda = false;
1921 bool IsStructor = false, HasThisQuals = ForceThisQuals, IsCtorClosure = false;
1922 CallingConv CC = T->getCallConv();
1923 if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(D)) {
1924 if (MD->getParent()->isLambda())
1926 if (MD->isInstance())
1927 HasThisQuals = true;
1928 if (isa<CXXDestructorDecl>(MD)) {
1930 } else if (isa<CXXConstructorDecl>(MD)) {
1932 IsCtorClosure = (StructorType == Ctor_CopyingClosure ||
1933 StructorType == Ctor_DefaultClosure) &&
1936 CC = getASTContext().getDefaultCallingConvention(
1937 /*IsVariadic=*/false, /*IsCXXMethod=*/true);
1941 // If this is a C++ instance method, mangle the CVR qualifiers for the
1944 Qualifiers Quals = Qualifiers::fromCVRUMask(Proto->getTypeQuals());
1945 manglePointerExtQualifiers(Quals, /*PointeeType=*/QualType());
1946 mangleRefQualifier(Proto->getRefQualifier());
1947 mangleQualifiers(Quals, /*IsMember=*/false);
1950 mangleCallingConvention(CC);
1952 // <return-type> ::= <type>
1953 // ::= @ # structors (they have no declared return type)
1955 if (isa<CXXDestructorDecl>(D) && isStructorDecl(D)) {
1956 // The scalar deleting destructor takes an extra int argument which is not
1957 // reflected in the AST.
1958 if (StructorType == Dtor_Deleting) {
1959 Out << (PointersAre64Bit ? "PEAXI@Z" : "PAXI@Z");
1962 // The vbase destructor returns void which is not reflected in the AST.
1963 if (StructorType == Dtor_Complete) {
1968 if (IsCtorClosure) {
1969 // Default constructor closure and copy constructor closure both return
1973 if (StructorType == Ctor_DefaultClosure) {
1974 // Default constructor closure always has no arguments.
1976 } else if (StructorType == Ctor_CopyingClosure) {
1977 // Copy constructor closure always takes an unqualified reference.
1978 mangleArgumentType(getASTContext().getLValueReferenceType(
1979 Proto->getParamType(0)
1980 ->getAs<LValueReferenceType>()
1982 /*SpelledAsLValue=*/true),
1986 llvm_unreachable("unexpected constructor closure!");
1993 QualType ResultType = T->getReturnType();
1994 if (const auto *AT =
1995 dyn_cast_or_null<AutoType>(ResultType->getContainedAutoType())) {
1997 mangleQualifiers(ResultType.getLocalQualifiers(), /*IsMember=*/false);
1999 assert(AT->getKeyword() != AutoTypeKeyword::GNUAutoType &&
2000 "shouldn't need to mangle __auto_type!");
2001 mangleSourceName(AT->isDecltypeAuto() ? "<decltype-auto>" : "<auto>");
2003 } else if (IsInLambda) {
2006 if (ResultType->isVoidType())
2007 ResultType = ResultType.getUnqualifiedType();
2008 mangleType(ResultType, Range, QMM_Result);
2012 // <argument-list> ::= X # void
2014 // ::= <type>* Z # varargs
2016 // Function types without prototypes can arise when mangling a function type
2017 // within an overloadable function in C. We mangle these as the absence of
2018 // any parameter types (not even an empty parameter list).
2020 } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
2023 // Happens for function pointer type arguments for example.
2024 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
2025 mangleArgumentType(Proto->getParamType(I), Range);
2026 // Mangle each pass_object_size parameter as if it's a parameter of enum
2027 // type passed directly after the parameter with the pass_object_size
2028 // attribute. The aforementioned enum's name is __pass_object_size, and we
2029 // pretend it resides in a top-level namespace called __clang.
2031 // FIXME: Is there a defined extension notation for the MS ABI, or is it
2032 // necessary to just cross our fingers and hope this type+namespace
2033 // combination doesn't conflict with anything?
2035 if (const auto *P = D->getParamDecl(I)->getAttr<PassObjectSizeAttr>())
2036 manglePassObjectSizeArg(P);
2038 // <builtin-type> ::= Z # ellipsis
2039 if (Proto->isVariadic())
2045 mangleThrowSpecification(Proto);
2048 void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
2049 // <function-class> ::= <member-function> E? # E designates a 64-bit 'this'
2050 // # pointer. in 64-bit mode *all*
2051 // # 'this' pointers are 64-bit.
2052 // ::= <global-function>
2053 // <member-function> ::= A # private: near
2054 // ::= B # private: far
2055 // ::= C # private: static near
2056 // ::= D # private: static far
2057 // ::= E # private: virtual near
2058 // ::= F # private: virtual far
2059 // ::= I # protected: near
2060 // ::= J # protected: far
2061 // ::= K # protected: static near
2062 // ::= L # protected: static far
2063 // ::= M # protected: virtual near
2064 // ::= N # protected: virtual far
2065 // ::= Q # public: near
2066 // ::= R # public: far
2067 // ::= S # public: static near
2068 // ::= T # public: static far
2069 // ::= U # public: virtual near
2070 // ::= V # public: virtual far
2071 // <global-function> ::= Y # global near
2072 // ::= Z # global far
2073 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
2074 bool IsVirtual = MD->isVirtual();
2075 // When mangling vbase destructor variants, ignore whether or not the
2076 // underlying destructor was defined to be virtual.
2077 if (isa<CXXDestructorDecl>(MD) && isStructorDecl(MD) &&
2078 StructorType == Dtor_Complete) {
2081 switch (MD->getAccess()) {
2083 llvm_unreachable("Unsupported access specifier");
2112 void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
2113 // <calling-convention> ::= A # __cdecl
2114 // ::= B # __export __cdecl
2116 // ::= D # __export __pascal
2117 // ::= E # __thiscall
2118 // ::= F # __export __thiscall
2119 // ::= G # __stdcall
2120 // ::= H # __export __stdcall
2121 // ::= I # __fastcall
2122 // ::= J # __export __fastcall
2123 // ::= Q # __vectorcall
2124 // ::= w # __regcall
2125 // The 'export' calling conventions are from a bygone era
2126 // (*cough*Win16*cough*) when functions were declared for export with
2127 // that keyword. (It didn't actually export them, it just made them so
2128 // that they could be in a DLL and somebody from another module could call
2133 llvm_unreachable("Unsupported CC for mangling");
2136 case CC_C: Out << 'A'; break;
2137 case CC_X86Pascal: Out << 'C'; break;
2138 case CC_X86ThisCall: Out << 'E'; break;
2139 case CC_X86StdCall: Out << 'G'; break;
2140 case CC_X86FastCall: Out << 'I'; break;
2141 case CC_X86VectorCall: Out << 'Q'; break;
2142 case CC_Swift: Out << 'S'; break;
2143 case CC_X86RegCall: Out << 'w'; break;
2146 void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T) {
2147 mangleCallingConvention(T->getCallConv());
2149 void MicrosoftCXXNameMangler::mangleThrowSpecification(
2150 const FunctionProtoType *FT) {
2151 // <throw-spec> ::= Z # throw(...) (default)
2152 // ::= @ # throw() or __declspec/__attribute__((nothrow))
2154 // NOTE: Since the Microsoft compiler ignores throw specifications, they are
2155 // all actually mangled as 'Z'. (They're ignored because their associated
2156 // functionality isn't implemented, and probably never will be.)
2160 void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
2161 Qualifiers, SourceRange Range) {
2162 // Probably should be mangled as a template instantiation; need to see what
2164 DiagnosticsEngine &Diags = Context.getDiags();
2165 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2166 "cannot mangle this unresolved dependent type yet");
2167 Diags.Report(Range.getBegin(), DiagID)
2171 // <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
2172 // <union-type> ::= T <name>
2173 // <struct-type> ::= U <name>
2174 // <class-type> ::= V <name>
2175 // <enum-type> ::= W4 <name>
2176 void MicrosoftCXXNameMangler::mangleTagTypeKind(TagTypeKind TTK) {
2193 void MicrosoftCXXNameMangler::mangleType(const EnumType *T, Qualifiers,
2195 mangleType(cast<TagType>(T)->getDecl());
2197 void MicrosoftCXXNameMangler::mangleType(const RecordType *T, Qualifiers,
2199 mangleType(cast<TagType>(T)->getDecl());
2201 void MicrosoftCXXNameMangler::mangleType(const TagDecl *TD) {
2202 mangleTagTypeKind(TD->getTagKind());
2205 void MicrosoftCXXNameMangler::mangleArtificalTagType(
2206 TagTypeKind TK, StringRef UnqualifiedName, ArrayRef<StringRef> NestedNames) {
2207 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
2208 mangleTagTypeKind(TK);
2210 // Always start with the unqualified name.
2211 mangleSourceName(UnqualifiedName);
2213 for (auto I = NestedNames.rbegin(), E = NestedNames.rend(); I != E; ++I)
2214 mangleSourceName(*I);
2216 // Terminate the whole name with an '@'.
2220 // <type> ::= <array-type>
2221 // <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2222 // [Y <dimension-count> <dimension>+]
2223 // <element-type> # as global, E is never required
2224 // It's supposed to be the other way around, but for some strange reason, it
2225 // isn't. Today this behavior is retained for the sole purpose of backwards
2227 void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T) {
2228 // This isn't a recursive mangling, so now we have to do it all in this
2230 manglePointerCVQualifiers(T->getElementType().getQualifiers());
2231 mangleType(T->getElementType(), SourceRange());
2233 void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T, Qualifiers,
2235 llvm_unreachable("Should have been special cased");
2237 void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T, Qualifiers,
2239 llvm_unreachable("Should have been special cased");
2241 void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
2242 Qualifiers, SourceRange) {
2243 llvm_unreachable("Should have been special cased");
2245 void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
2246 Qualifiers, SourceRange) {
2247 llvm_unreachable("Should have been special cased");
2249 void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T) {
2250 QualType ElementTy(T, 0);
2251 SmallVector<llvm::APInt, 3> Dimensions;
2253 if (ElementTy->isConstantArrayType()) {
2254 const ConstantArrayType *CAT =
2255 getASTContext().getAsConstantArrayType(ElementTy);
2256 Dimensions.push_back(CAT->getSize());
2257 ElementTy = CAT->getElementType();
2258 } else if (ElementTy->isIncompleteArrayType()) {
2259 const IncompleteArrayType *IAT =
2260 getASTContext().getAsIncompleteArrayType(ElementTy);
2261 Dimensions.push_back(llvm::APInt(32, 0));
2262 ElementTy = IAT->getElementType();
2263 } else if (ElementTy->isVariableArrayType()) {
2264 const VariableArrayType *VAT =
2265 getASTContext().getAsVariableArrayType(ElementTy);
2266 Dimensions.push_back(llvm::APInt(32, 0));
2267 ElementTy = VAT->getElementType();
2268 } else if (ElementTy->isDependentSizedArrayType()) {
2269 // The dependent expression has to be folded into a constant (TODO).
2270 const DependentSizedArrayType *DSAT =
2271 getASTContext().getAsDependentSizedArrayType(ElementTy);
2272 DiagnosticsEngine &Diags = Context.getDiags();
2273 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2274 "cannot mangle this dependent-length array yet");
2275 Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
2276 << DSAT->getBracketsRange();
2283 // <dimension-count> ::= <number> # number of extra dimensions
2284 mangleNumber(Dimensions.size());
2285 for (const llvm::APInt &Dimension : Dimensions)
2286 mangleNumber(Dimension.getLimitedValue());
2287 mangleType(ElementTy, SourceRange(), QMM_Escape);
2290 // <type> ::= <pointer-to-member-type>
2291 // <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2292 // <class name> <type>
2293 void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T, Qualifiers Quals,
2294 SourceRange Range) {
2295 QualType PointeeType = T->getPointeeType();
2296 manglePointerCVQualifiers(Quals);
2297 manglePointerExtQualifiers(Quals, PointeeType);
2298 if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
2300 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2301 mangleFunctionType(FPT, nullptr, true);
2303 mangleQualifiers(PointeeType.getQualifiers(), true);
2304 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2305 mangleType(PointeeType, Range, QMM_Drop);
2309 void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
2310 Qualifiers, SourceRange Range) {
2311 DiagnosticsEngine &Diags = Context.getDiags();
2312 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2313 "cannot mangle this template type parameter type yet");
2314 Diags.Report(Range.getBegin(), DiagID)
2318 void MicrosoftCXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T,
2319 Qualifiers, SourceRange Range) {
2320 DiagnosticsEngine &Diags = Context.getDiags();
2321 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2322 "cannot mangle this substituted parameter pack yet");
2323 Diags.Report(Range.getBegin(), DiagID)
2327 // <type> ::= <pointer-type>
2328 // <pointer-type> ::= E? <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
2329 // # the E is required for 64-bit non-static pointers
2330 void MicrosoftCXXNameMangler::mangleType(const PointerType *T, Qualifiers Quals,
2331 SourceRange Range) {
2332 QualType PointeeType = T->getPointeeType();
2333 manglePointerCVQualifiers(Quals);
2334 manglePointerExtQualifiers(Quals, PointeeType);
2335 mangleType(PointeeType, Range);
2338 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
2339 Qualifiers Quals, SourceRange Range) {
2340 if (T->isObjCIdType() || T->isObjCClassType())
2341 return mangleType(T->getPointeeType(), Range, QMM_Drop);
2343 QualType PointeeType = T->getPointeeType();
2344 manglePointerCVQualifiers(Quals);
2345 manglePointerExtQualifiers(Quals, PointeeType);
2346 mangleType(PointeeType, Range);
2349 // <type> ::= <reference-type>
2350 // <reference-type> ::= A E? <cvr-qualifiers> <type>
2351 // # the E is required for 64-bit non-static lvalue references
2352 void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
2353 Qualifiers Quals, SourceRange Range) {
2354 QualType PointeeType = T->getPointeeType();
2355 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2357 manglePointerExtQualifiers(Quals, PointeeType);
2358 mangleType(PointeeType, Range);
2361 // <type> ::= <r-value-reference-type>
2362 // <r-value-reference-type> ::= $$Q E? <cvr-qualifiers> <type>
2363 // # the E is required for 64-bit non-static rvalue references
2364 void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
2365 Qualifiers Quals, SourceRange Range) {
2366 QualType PointeeType = T->getPointeeType();
2367 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2369 manglePointerExtQualifiers(Quals, PointeeType);
2370 mangleType(PointeeType, Range);
2373 void MicrosoftCXXNameMangler::mangleType(const ComplexType *T, Qualifiers,
2374 SourceRange Range) {
2375 QualType ElementType = T->getElementType();
2377 llvm::SmallString<64> TemplateMangling;
2378 llvm::raw_svector_ostream Stream(TemplateMangling);
2379 MicrosoftCXXNameMangler Extra(Context, Stream);
2381 Extra.mangleSourceName("_Complex");
2382 Extra.mangleType(ElementType, Range, QMM_Escape);
2384 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2387 void MicrosoftCXXNameMangler::mangleType(const VectorType *T, Qualifiers Quals,
2388 SourceRange Range) {
2389 const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
2390 assert(ET && "vectors with non-builtin elements are unsupported");
2391 uint64_t Width = getASTContext().getTypeSize(T);
2392 // Pattern match exactly the typedefs in our intrinsic headers. Anything that
2393 // doesn't match the Intel types uses a custom mangling below.
2394 size_t OutSizeBefore = Out.tell();
2395 llvm::Triple::ArchType AT =
2396 getASTContext().getTargetInfo().getTriple().getArch();
2397 if (AT == llvm::Triple::x86 || AT == llvm::Triple::x86_64) {
2398 if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
2399 mangleArtificalTagType(TTK_Union, "__m64");
2400 } else if (Width >= 128) {
2401 if (ET->getKind() == BuiltinType::Float)
2402 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width));
2403 else if (ET->getKind() == BuiltinType::LongLong)
2404 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width) + 'i');
2405 else if (ET->getKind() == BuiltinType::Double)
2406 mangleArtificalTagType(TTK_Struct, "__m" + llvm::utostr(Width) + 'd');
2410 bool IsBuiltin = Out.tell() != OutSizeBefore;
2412 // The MS ABI doesn't have a special mangling for vector types, so we define
2413 // our own mangling to handle uses of __vector_size__ on user-specified
2414 // types, and for extensions like __v4sf.
2416 llvm::SmallString<64> TemplateMangling;
2417 llvm::raw_svector_ostream Stream(TemplateMangling);
2418 MicrosoftCXXNameMangler Extra(Context, Stream);
2420 Extra.mangleSourceName("__vector");
2421 Extra.mangleType(QualType(ET, 0), Range, QMM_Escape);
2422 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumElements()),
2423 /*IsBoolean=*/false);
2425 mangleArtificalTagType(TTK_Union, TemplateMangling, {"__clang"});
2429 void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
2430 Qualifiers Quals, SourceRange Range) {
2431 mangleType(static_cast<const VectorType *>(T), Quals, Range);
2433 void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
2434 Qualifiers, SourceRange Range) {
2435 DiagnosticsEngine &Diags = Context.getDiags();
2436 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2437 "cannot mangle this dependent-sized extended vector type yet");
2438 Diags.Report(Range.getBegin(), DiagID)
2442 void MicrosoftCXXNameMangler::mangleType(const DependentAddressSpaceType *T,
2443 Qualifiers, SourceRange Range) {
2444 DiagnosticsEngine &Diags = Context.getDiags();
2445 unsigned DiagID = Diags.getCustomDiagID(
2446 DiagnosticsEngine::Error,
2447 "cannot mangle this dependent address space type yet");
2448 Diags.Report(Range.getBegin(), DiagID) << Range;
2451 void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T, Qualifiers,
2453 // ObjC interfaces have structs underlying them.
2454 mangleTagTypeKind(TTK_Struct);
2455 mangleName(T->getDecl());
2458 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T, Qualifiers,
2459 SourceRange Range) {
2460 // We don't allow overloading by different protocol qualification,
2461 // so mangling them isn't necessary.
2462 mangleType(T->getBaseType(), Range, QMM_Drop);
2465 void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
2466 Qualifiers Quals, SourceRange Range) {
2467 QualType PointeeType = T->getPointeeType();
2468 manglePointerCVQualifiers(Quals);
2469 manglePointerExtQualifiers(Quals, PointeeType);
2473 mangleFunctionType(PointeeType->castAs<FunctionProtoType>());
2476 void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *,
2477 Qualifiers, SourceRange) {
2478 llvm_unreachable("Cannot mangle injected class name type.");
2481 void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
2482 Qualifiers, SourceRange Range) {
2483 DiagnosticsEngine &Diags = Context.getDiags();
2484 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2485 "cannot mangle this template specialization type yet");
2486 Diags.Report(Range.getBegin(), DiagID)
2490 void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T, Qualifiers,
2491 SourceRange Range) {
2492 DiagnosticsEngine &Diags = Context.getDiags();
2493 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2494 "cannot mangle this dependent name type yet");
2495 Diags.Report(Range.getBegin(), DiagID)
2499 void MicrosoftCXXNameMangler::mangleType(
2500 const DependentTemplateSpecializationType *T, Qualifiers,
2501 SourceRange Range) {
2502 DiagnosticsEngine &Diags = Context.getDiags();
2503 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2504 "cannot mangle this dependent template specialization type yet");
2505 Diags.Report(Range.getBegin(), DiagID)
2509 void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T, Qualifiers,
2510 SourceRange Range) {
2511 DiagnosticsEngine &Diags = Context.getDiags();
2512 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2513 "cannot mangle this pack expansion yet");
2514 Diags.Report(Range.getBegin(), DiagID)
2518 void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T, Qualifiers,
2519 SourceRange Range) {
2520 DiagnosticsEngine &Diags = Context.getDiags();
2521 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2522 "cannot mangle this typeof(type) yet");
2523 Diags.Report(Range.getBegin(), DiagID)
2527 void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T, Qualifiers,
2528 SourceRange Range) {
2529 DiagnosticsEngine &Diags = Context.getDiags();
2530 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2531 "cannot mangle this typeof(expression) yet");
2532 Diags.Report(Range.getBegin(), DiagID)
2536 void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T, Qualifiers,
2537 SourceRange Range) {
2538 DiagnosticsEngine &Diags = Context.getDiags();
2539 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2540 "cannot mangle this decltype() yet");
2541 Diags.Report(Range.getBegin(), DiagID)
2545 void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
2546 Qualifiers, SourceRange Range) {
2547 DiagnosticsEngine &Diags = Context.getDiags();
2548 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2549 "cannot mangle this unary transform type yet");
2550 Diags.Report(Range.getBegin(), DiagID)
2554 void MicrosoftCXXNameMangler::mangleType(const AutoType *T, Qualifiers,
2555 SourceRange Range) {
2556 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2558 DiagnosticsEngine &Diags = Context.getDiags();
2559 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2560 "cannot mangle this 'auto' type yet");
2561 Diags.Report(Range.getBegin(), DiagID)
2565 void MicrosoftCXXNameMangler::mangleType(
2566 const DeducedTemplateSpecializationType *T, Qualifiers, SourceRange Range) {
2567 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2569 DiagnosticsEngine &Diags = Context.getDiags();
2570 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2571 "cannot mangle this deduced class template specialization type yet");
2572 Diags.Report(Range.getBegin(), DiagID)
2576 void MicrosoftCXXNameMangler::mangleType(const AtomicType *T, Qualifiers,
2577 SourceRange Range) {
2578 QualType ValueType = T->getValueType();
2580 llvm::SmallString<64> TemplateMangling;
2581 llvm::raw_svector_ostream Stream(TemplateMangling);
2582 MicrosoftCXXNameMangler Extra(Context, Stream);
2584 Extra.mangleSourceName("_Atomic");
2585 Extra.mangleType(ValueType, Range, QMM_Escape);
2587 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2590 void MicrosoftCXXNameMangler::mangleType(const PipeType *T, Qualifiers,
2591 SourceRange Range) {
2592 DiagnosticsEngine &Diags = Context.getDiags();
2593 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2594 "cannot mangle this OpenCL pipe type yet");
2595 Diags.Report(Range.getBegin(), DiagID)
2599 void MicrosoftMangleContextImpl::mangleCXXName(const NamedDecl *D,
2601 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
2602 "Invalid mangleName() call, argument is not a variable or function!");
2603 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
2604 "Invalid mangleName() call on 'structor decl!");
2606 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
2607 getASTContext().getSourceManager(),
2608 "Mangling declaration");
2610 msvc_hashing_ostream MHO(Out);
2611 MicrosoftCXXNameMangler Mangler(*this, MHO);
2612 return Mangler.mangle(D);
2615 // <this-adjustment> ::= <no-adjustment> | <static-adjustment> |
2616 // <virtual-adjustment>
2617 // <no-adjustment> ::= A # private near
2618 // ::= B # private far
2619 // ::= I # protected near
2620 // ::= J # protected far
2621 // ::= Q # public near
2622 // ::= R # public far
2623 // <static-adjustment> ::= G <static-offset> # private near
2624 // ::= H <static-offset> # private far
2625 // ::= O <static-offset> # protected near
2626 // ::= P <static-offset> # protected far
2627 // ::= W <static-offset> # public near
2628 // ::= X <static-offset> # public far
2629 // <virtual-adjustment> ::= $0 <virtual-shift> <static-offset> # private near
2630 // ::= $1 <virtual-shift> <static-offset> # private far
2631 // ::= $2 <virtual-shift> <static-offset> # protected near
2632 // ::= $3 <virtual-shift> <static-offset> # protected far
2633 // ::= $4 <virtual-shift> <static-offset> # public near
2634 // ::= $5 <virtual-shift> <static-offset> # public far
2635 // <virtual-shift> ::= <vtordisp-shift> | <vtordispex-shift>
2636 // <vtordisp-shift> ::= <offset-to-vtordisp>
2637 // <vtordispex-shift> ::= <offset-to-vbptr> <vbase-offset-offset>
2638 // <offset-to-vtordisp>
2639 static void mangleThunkThisAdjustment(const CXXMethodDecl *MD,
2640 const ThisAdjustment &Adjustment,
2641 MicrosoftCXXNameMangler &Mangler,
2643 if (!Adjustment.Virtual.isEmpty()) {
2646 switch (MD->getAccess()) {
2648 llvm_unreachable("Unsupported access specifier");
2658 if (Adjustment.Virtual.Microsoft.VBPtrOffset) {
2659 Out << 'R' << AccessSpec;
2660 Mangler.mangleNumber(
2661 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBPtrOffset));
2662 Mangler.mangleNumber(
2663 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBOffsetOffset));
2664 Mangler.mangleNumber(
2665 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2666 Mangler.mangleNumber(static_cast<uint32_t>(Adjustment.NonVirtual));
2669 Mangler.mangleNumber(
2670 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2671 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2673 } else if (Adjustment.NonVirtual != 0) {
2674 switch (MD->getAccess()) {
2676 llvm_unreachable("Unsupported access specifier");
2686 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2688 switch (MD->getAccess()) {
2690 llvm_unreachable("Unsupported access specifier");
2704 MicrosoftMangleContextImpl::mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
2706 MicrosoftVTableContext *VTContext =
2707 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
2708 const MicrosoftVTableContext::MethodVFTableLocation &ML =
2709 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
2711 msvc_hashing_ostream MHO(Out);
2712 MicrosoftCXXNameMangler Mangler(*this, MHO);
2713 Mangler.getStream() << "\01?";
2714 Mangler.mangleVirtualMemPtrThunk(MD, ML);
2717 void MicrosoftMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
2718 const ThunkInfo &Thunk,
2720 msvc_hashing_ostream MHO(Out);
2721 MicrosoftCXXNameMangler Mangler(*this, MHO);
2722 Mangler.getStream() << "\01?";
2723 Mangler.mangleName(MD);
2724 mangleThunkThisAdjustment(MD, Thunk.This, Mangler, MHO);
2725 if (!Thunk.Return.isEmpty())
2726 assert(Thunk.Method != nullptr &&
2727 "Thunk info should hold the overridee decl");
2729 const CXXMethodDecl *DeclForFPT = Thunk.Method ? Thunk.Method : MD;
2730 Mangler.mangleFunctionType(
2731 DeclForFPT->getType()->castAs<FunctionProtoType>(), MD);
2734 void MicrosoftMangleContextImpl::mangleCXXDtorThunk(
2735 const CXXDestructorDecl *DD, CXXDtorType Type,
2736 const ThisAdjustment &Adjustment, raw_ostream &Out) {
2737 // FIXME: Actually, the dtor thunk should be emitted for vector deleting
2738 // dtors rather than scalar deleting dtors. Just use the vector deleting dtor
2739 // mangling manually until we support both deleting dtor types.
2740 assert(Type == Dtor_Deleting);
2741 msvc_hashing_ostream MHO(Out);
2742 MicrosoftCXXNameMangler Mangler(*this, MHO, DD, Type);
2743 Mangler.getStream() << "\01??_E";
2744 Mangler.mangleName(DD->getParent());
2745 mangleThunkThisAdjustment(DD, Adjustment, Mangler, MHO);
2746 Mangler.mangleFunctionType(DD->getType()->castAs<FunctionProtoType>(), DD);
2749 void MicrosoftMangleContextImpl::mangleCXXVFTable(
2750 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2752 // <mangled-name> ::= ?_7 <class-name> <storage-class>
2753 // <cvr-qualifiers> [<name>] @
2754 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2755 // is always '6' for vftables.
2756 msvc_hashing_ostream MHO(Out);
2757 MicrosoftCXXNameMangler Mangler(*this, MHO);
2758 if (Derived->hasAttr<DLLImportAttr>())
2759 Mangler.getStream() << "\01??_S";
2761 Mangler.getStream() << "\01??_7";
2762 Mangler.mangleName(Derived);
2763 Mangler.getStream() << "6B"; // '6' for vftable, 'B' for const.
2764 for (const CXXRecordDecl *RD : BasePath)
2765 Mangler.mangleName(RD);
2766 Mangler.getStream() << '@';
2769 void MicrosoftMangleContextImpl::mangleCXXVBTable(
2770 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2772 // <mangled-name> ::= ?_8 <class-name> <storage-class>
2773 // <cvr-qualifiers> [<name>] @
2774 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2775 // is always '7' for vbtables.
2776 msvc_hashing_ostream MHO(Out);
2777 MicrosoftCXXNameMangler Mangler(*this, MHO);
2778 Mangler.getStream() << "\01??_8";
2779 Mangler.mangleName(Derived);
2780 Mangler.getStream() << "7B"; // '7' for vbtable, 'B' for const.
2781 for (const CXXRecordDecl *RD : BasePath)
2782 Mangler.mangleName(RD);
2783 Mangler.getStream() << '@';
2786 void MicrosoftMangleContextImpl::mangleCXXRTTI(QualType T, raw_ostream &Out) {
2787 msvc_hashing_ostream MHO(Out);
2788 MicrosoftCXXNameMangler Mangler(*this, MHO);
2789 Mangler.getStream() << "\01??_R0";
2790 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2791 Mangler.getStream() << "@8";
2794 void MicrosoftMangleContextImpl::mangleCXXRTTIName(QualType T,
2796 MicrosoftCXXNameMangler Mangler(*this, Out);
2797 Mangler.getStream() << '.';
2798 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2801 void MicrosoftMangleContextImpl::mangleCXXVirtualDisplacementMap(
2802 const CXXRecordDecl *SrcRD, const CXXRecordDecl *DstRD, raw_ostream &Out) {
2803 msvc_hashing_ostream MHO(Out);
2804 MicrosoftCXXNameMangler Mangler(*this, MHO);
2805 Mangler.getStream() << "\01??_K";
2806 Mangler.mangleName(SrcRD);
2807 Mangler.getStream() << "$C";
2808 Mangler.mangleName(DstRD);
2811 void MicrosoftMangleContextImpl::mangleCXXThrowInfo(QualType T, bool IsConst,
2814 uint32_t NumEntries,
2816 msvc_hashing_ostream MHO(Out);
2817 MicrosoftCXXNameMangler Mangler(*this, MHO);
2818 Mangler.getStream() << "_TI";
2820 Mangler.getStream() << 'C';
2822 Mangler.getStream() << 'V';
2824 Mangler.getStream() << 'U';
2825 Mangler.getStream() << NumEntries;
2826 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2829 void MicrosoftMangleContextImpl::mangleCXXCatchableTypeArray(
2830 QualType T, uint32_t NumEntries, raw_ostream &Out) {
2831 msvc_hashing_ostream MHO(Out);
2832 MicrosoftCXXNameMangler Mangler(*this, MHO);
2833 Mangler.getStream() << "_CTA";
2834 Mangler.getStream() << NumEntries;
2835 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2838 void MicrosoftMangleContextImpl::mangleCXXCatchableType(
2839 QualType T, const CXXConstructorDecl *CD, CXXCtorType CT, uint32_t Size,
2840 uint32_t NVOffset, int32_t VBPtrOffset, uint32_t VBIndex,
2842 MicrosoftCXXNameMangler Mangler(*this, Out);
2843 Mangler.getStream() << "_CT";
2845 llvm::SmallString<64> RTTIMangling;
2847 llvm::raw_svector_ostream Stream(RTTIMangling);
2848 msvc_hashing_ostream MHO(Stream);
2849 mangleCXXRTTI(T, MHO);
2851 Mangler.getStream() << RTTIMangling.substr(1);
2853 // VS2015 CTP6 omits the copy-constructor in the mangled name. This name is,
2854 // in fact, superfluous but I'm not sure the change was made consciously.
2855 llvm::SmallString<64> CopyCtorMangling;
2856 if (!getASTContext().getLangOpts().isCompatibleWithMSVC(
2857 LangOptions::MSVC2015) &&
2859 llvm::raw_svector_ostream Stream(CopyCtorMangling);
2860 msvc_hashing_ostream MHO(Stream);
2861 mangleCXXCtor(CD, CT, MHO);
2863 Mangler.getStream() << CopyCtorMangling.substr(1);
2865 Mangler.getStream() << Size;
2866 if (VBPtrOffset == -1) {
2868 Mangler.getStream() << NVOffset;
2871 Mangler.getStream() << NVOffset;
2872 Mangler.getStream() << VBPtrOffset;
2873 Mangler.getStream() << VBIndex;
2877 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassDescriptor(
2878 const CXXRecordDecl *Derived, uint32_t NVOffset, int32_t VBPtrOffset,
2879 uint32_t VBTableOffset, uint32_t Flags, raw_ostream &Out) {
2880 msvc_hashing_ostream MHO(Out);
2881 MicrosoftCXXNameMangler Mangler(*this, MHO);
2882 Mangler.getStream() << "\01??_R1";
2883 Mangler.mangleNumber(NVOffset);
2884 Mangler.mangleNumber(VBPtrOffset);
2885 Mangler.mangleNumber(VBTableOffset);
2886 Mangler.mangleNumber(Flags);
2887 Mangler.mangleName(Derived);
2888 Mangler.getStream() << "8";
2891 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassArray(
2892 const CXXRecordDecl *Derived, raw_ostream &Out) {
2893 msvc_hashing_ostream MHO(Out);
2894 MicrosoftCXXNameMangler Mangler(*this, MHO);
2895 Mangler.getStream() << "\01??_R2";
2896 Mangler.mangleName(Derived);
2897 Mangler.getStream() << "8";
2900 void MicrosoftMangleContextImpl::mangleCXXRTTIClassHierarchyDescriptor(
2901 const CXXRecordDecl *Derived, raw_ostream &Out) {
2902 msvc_hashing_ostream MHO(Out);
2903 MicrosoftCXXNameMangler Mangler(*this, MHO);
2904 Mangler.getStream() << "\01??_R3";
2905 Mangler.mangleName(Derived);
2906 Mangler.getStream() << "8";
2909 void MicrosoftMangleContextImpl::mangleCXXRTTICompleteObjectLocator(
2910 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2912 // <mangled-name> ::= ?_R4 <class-name> <storage-class>
2913 // <cvr-qualifiers> [<name>] @
2914 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2915 // is always '6' for vftables.
2916 llvm::SmallString<64> VFTableMangling;
2917 llvm::raw_svector_ostream Stream(VFTableMangling);
2918 mangleCXXVFTable(Derived, BasePath, Stream);
2920 if (VFTableMangling.startswith("\01??@")) {
2921 assert(VFTableMangling.endswith("@"));
2922 Out << VFTableMangling << "??_R4@";
2926 assert(VFTableMangling.startswith("\01??_7") ||
2927 VFTableMangling.startswith("\01??_S"));
2929 Out << "\01??_R4" << StringRef(VFTableMangling).drop_front(5);
2932 void MicrosoftMangleContextImpl::mangleSEHFilterExpression(
2933 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
2934 msvc_hashing_ostream MHO(Out);
2935 MicrosoftCXXNameMangler Mangler(*this, MHO);
2936 // The function body is in the same comdat as the function with the handler,
2937 // so the numbering here doesn't have to be the same across TUs.
2939 // <mangled-name> ::= ?filt$ <filter-number> @0
2940 Mangler.getStream() << "\01?filt$" << SEHFilterIds[EnclosingDecl]++ << "@0@";
2941 Mangler.mangleName(EnclosingDecl);
2944 void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
2945 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
2946 msvc_hashing_ostream MHO(Out);
2947 MicrosoftCXXNameMangler Mangler(*this, MHO);
2948 // The function body is in the same comdat as the function with the handler,
2949 // so the numbering here doesn't have to be the same across TUs.
2951 // <mangled-name> ::= ?fin$ <filter-number> @0
2952 Mangler.getStream() << "\01?fin$" << SEHFinallyIds[EnclosingDecl]++ << "@0@";
2953 Mangler.mangleName(EnclosingDecl);
2956 void MicrosoftMangleContextImpl::mangleTypeName(QualType T, raw_ostream &Out) {
2957 // This is just a made up unique string for the purposes of tbaa. undname
2958 // does *not* know how to demangle it.
2959 MicrosoftCXXNameMangler Mangler(*this, Out);
2960 Mangler.getStream() << '?';
2961 Mangler.mangleType(T, SourceRange());
2964 void MicrosoftMangleContextImpl::mangleCXXCtor(const CXXConstructorDecl *D,
2967 msvc_hashing_ostream MHO(Out);
2968 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
2972 void MicrosoftMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
2975 msvc_hashing_ostream MHO(Out);
2976 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
2980 void MicrosoftMangleContextImpl::mangleReferenceTemporary(
2981 const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
2982 msvc_hashing_ostream MHO(Out);
2983 MicrosoftCXXNameMangler Mangler(*this, MHO);
2985 Mangler.getStream() << "\01?$RT" << ManglingNumber << '@';
2986 Mangler.mangle(VD, "");
2989 void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(
2990 const VarDecl *VD, unsigned GuardNum, raw_ostream &Out) {
2991 msvc_hashing_ostream MHO(Out);
2992 MicrosoftCXXNameMangler Mangler(*this, MHO);
2994 Mangler.getStream() << "\01?$TSS" << GuardNum << '@';
2995 Mangler.mangleNestedName(VD);
2996 Mangler.getStream() << "@4HA";
2999 void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,
3001 // <guard-name> ::= ?_B <postfix> @5 <scope-depth>
3002 // ::= ?__J <postfix> @5 <scope-depth>
3003 // ::= ?$S <guard-num> @ <postfix> @4IA
3005 // The first mangling is what MSVC uses to guard static locals in inline
3006 // functions. It uses a different mangling in external functions to support
3007 // guarding more than 32 variables. MSVC rejects inline functions with more
3008 // than 32 static locals. We don't fully implement the second mangling
3009 // because those guards are not externally visible, and instead use LLVM's
3010 // default renaming when creating a new guard variable.
3011 msvc_hashing_ostream MHO(Out);
3012 MicrosoftCXXNameMangler Mangler(*this, MHO);
3014 bool Visible = VD->isExternallyVisible();
3016 Mangler.getStream() << (VD->getTLSKind() ? "\01??__J" : "\01??_B");
3018 Mangler.getStream() << "\01?$S1@";
3020 unsigned ScopeDepth = 0;
3021 if (Visible && !getNextDiscriminator(VD, ScopeDepth))
3022 // If we do not have a discriminator and are emitting a guard variable for
3023 // use at global scope, then mangling the nested name will not be enough to
3024 // remove ambiguities.
3025 Mangler.mangle(VD, "");
3027 Mangler.mangleNestedName(VD);
3028 Mangler.getStream() << (Visible ? "@5" : "@4IA");
3030 Mangler.mangleNumber(ScopeDepth);
3033 void MicrosoftMangleContextImpl::mangleInitFiniStub(const VarDecl *D,
3036 msvc_hashing_ostream MHO(Out);
3037 MicrosoftCXXNameMangler Mangler(*this, MHO);
3038 Mangler.getStream() << "\01??__" << CharCode;
3039 Mangler.mangleName(D);
3040 if (D->isStaticDataMember()) {
3041 Mangler.mangleVariableEncoding(D);
3042 Mangler.getStream() << '@';
3044 // This is the function class mangling. These stubs are global, non-variadic,
3045 // cdecl functions that return void and take no args.
3046 Mangler.getStream() << "YAXXZ";
3049 void MicrosoftMangleContextImpl::mangleDynamicInitializer(const VarDecl *D,
3051 // <initializer-name> ::= ?__E <name> YAXXZ
3052 mangleInitFiniStub(D, 'E', Out);
3056 MicrosoftMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
3058 // <destructor-name> ::= ?__F <name> YAXXZ
3059 mangleInitFiniStub(D, 'F', Out);
3062 void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
3064 // <char-type> ::= 0 # char
3066 // ::= ??? # char16_t/char32_t will need a mangling too...
3068 // <literal-length> ::= <non-negative integer> # the length of the literal
3070 // <encoded-crc> ::= <hex digit>+ @ # crc of the literal including
3071 // # null-terminator
3073 // <encoded-string> ::= <simple character> # uninteresting character
3074 // ::= '?$' <hex digit> <hex digit> # these two nibbles
3075 // # encode the byte for the
3077 // ::= '?' [a-z] # \xe1 - \xfa
3078 // ::= '?' [A-Z] # \xc1 - \xda
3079 // ::= '?' [0-9] # [,/\:. \n\t'-]
3081 // <literal> ::= '??_C@_' <char-type> <literal-length> <encoded-crc>
3082 // <encoded-string> '@'
3083 MicrosoftCXXNameMangler Mangler(*this, Out);
3084 Mangler.getStream() << "\01??_C@_";
3086 // <char-type>: The "kind" of string literal is encoded into the mangled name.
3088 Mangler.getStream() << '1';
3090 Mangler.getStream() << '0';
3092 // <literal-length>: The next part of the mangled name consists of the length
3094 // The StringLiteral does not consider the NUL terminator byte(s) but the
3096 // N.B. The length is in terms of bytes, not characters.
3097 Mangler.mangleNumber(SL->getByteLength() + SL->getCharByteWidth());
3099 auto GetLittleEndianByte = [&SL](unsigned Index) {
3100 unsigned CharByteWidth = SL->getCharByteWidth();
3101 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3102 unsigned OffsetInCodeUnit = Index % CharByteWidth;
3103 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3106 auto GetBigEndianByte = [&SL](unsigned Index) {
3107 unsigned CharByteWidth = SL->getCharByteWidth();
3108 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3109 unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);
3110 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3113 // CRC all the bytes of the StringLiteral.
3115 for (unsigned I = 0, E = SL->getByteLength(); I != E; ++I)
3116 JC.update(GetLittleEndianByte(I));
3118 // The NUL terminator byte(s) were not present earlier,
3119 // we need to manually process those bytes into the CRC.
3120 for (unsigned NullTerminator = 0; NullTerminator < SL->getCharByteWidth();
3124 // <encoded-crc>: The CRC is encoded utilizing the standard number mangling
3126 Mangler.mangleNumber(JC.getCRC());
3128 // <encoded-string>: The mangled name also contains the first 32 _characters_
3129 // (including null-terminator bytes) of the StringLiteral.
3130 // Each character is encoded by splitting them into bytes and then encoding
3131 // the constituent bytes.
3132 auto MangleByte = [&Mangler](char Byte) {
3133 // There are five different manglings for characters:
3134 // - [a-zA-Z0-9_$]: A one-to-one mapping.
3135 // - ?[a-z]: The range from \xe1 to \xfa.
3136 // - ?[A-Z]: The range from \xc1 to \xda.
3137 // - ?[0-9]: The set of [,/\:. \n\t'-].
3138 // - ?$XX: A fallback which maps nibbles.
3139 if (isIdentifierBody(Byte, /*AllowDollar=*/true)) {
3140 Mangler.getStream() << Byte;
3141 } else if (isLetter(Byte & 0x7f)) {
3142 Mangler.getStream() << '?' << static_cast<char>(Byte & 0x7f);
3144 const char SpecialChars[] = {',', '/', '\\', ':', '.',
3145 ' ', '\n', '\t', '\'', '-'};
3147 std::find(std::begin(SpecialChars), std::end(SpecialChars), Byte);
3148 if (Pos != std::end(SpecialChars)) {
3149 Mangler.getStream() << '?' << (Pos - std::begin(SpecialChars));
3151 Mangler.getStream() << "?$";
3152 Mangler.getStream() << static_cast<char>('A' + ((Byte >> 4) & 0xf));
3153 Mangler.getStream() << static_cast<char>('A' + (Byte & 0xf));
3158 // Enforce our 32 character max.
3159 unsigned NumCharsToMangle = std::min(32U, SL->getLength());
3160 for (unsigned I = 0, E = NumCharsToMangle * SL->getCharByteWidth(); I != E;
3163 MangleByte(GetBigEndianByte(I));
3165 MangleByte(GetLittleEndianByte(I));
3167 // Encode the NUL terminator if there is room.
3168 if (NumCharsToMangle < 32)
3169 for (unsigned NullTerminator = 0; NullTerminator < SL->getCharByteWidth();
3173 Mangler.getStream() << '@';
3176 MicrosoftMangleContext *
3177 MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
3178 return new MicrosoftMangleContextImpl(Context, Diags);