Bug Summary

File:clang/lib/AST/ItaniumMangle.cpp
Warning:line 334, column 28
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ItaniumMangle.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/AST -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D CLANG_ROUND_TRIP_CC1_ARGS=ON -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-04-14-063029-18377-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp

/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp

1//===--- ItaniumMangle.cpp - Itanium C++ Name Mangling ----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Implements C++ name mangling according to the Itanium C++ ABI,
10// which is used in GCC 3.2 and newer (and many compilers that are
11// ABI-compatible with GCC):
12//
13// http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling
14//
15//===----------------------------------------------------------------------===//
16
17#include "clang/AST/Mangle.h"
18#include "clang/AST/ASTContext.h"
19#include "clang/AST/Attr.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclOpenMP.h"
24#include "clang/AST/DeclTemplate.h"
25#include "clang/AST/Expr.h"
26#include "clang/AST/ExprConcepts.h"
27#include "clang/AST/ExprCXX.h"
28#include "clang/AST/ExprObjC.h"
29#include "clang/AST/TypeLoc.h"
30#include "clang/Basic/ABI.h"
31#include "clang/Basic/Module.h"
32#include "clang/Basic/SourceManager.h"
33#include "clang/Basic/TargetInfo.h"
34#include "llvm/ADT/StringExtras.h"
35#include "llvm/Support/ErrorHandling.h"
36#include "llvm/Support/raw_ostream.h"
37
38using namespace clang;
39
40namespace {
41
42/// Retrieve the declaration context that should be used when mangling the given
43/// declaration.
44static const DeclContext *getEffectiveDeclContext(const Decl *D) {
45 // The ABI assumes that lambda closure types that occur within
46 // default arguments live in the context of the function. However, due to
47 // the way in which Clang parses and creates function declarations, this is
48 // not the case: the lambda closure type ends up living in the context
49 // where the function itself resides, because the function declaration itself
50 // had not yet been created. Fix the context here.
51 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
52 if (RD->isLambda())
53 if (ParmVarDecl *ContextParam
54 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
55 return ContextParam->getDeclContext();
56 }
57
58 // Perform the same check for block literals.
59 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
60 if (ParmVarDecl *ContextParam
61 = dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
62 return ContextParam->getDeclContext();
63 }
64
65 const DeclContext *DC = D->getDeclContext();
66 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC) ||
67 isa<OMPDeclareMapperDecl>(DC)) {
68 return getEffectiveDeclContext(cast<Decl>(DC));
69 }
70
71 if (const auto *VD = dyn_cast<VarDecl>(D))
72 if (VD->isExternC())
73 return VD->getASTContext().getTranslationUnitDecl();
74
75 if (const auto *FD = dyn_cast<FunctionDecl>(D))
76 if (FD->isExternC())
77 return FD->getASTContext().getTranslationUnitDecl();
78
79 return DC->getRedeclContext();
80}
81
82static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
83 return getEffectiveDeclContext(cast<Decl>(DC));
84}
85
86static bool isLocalContainerContext(const DeclContext *DC) {
87 return isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC) || isa<BlockDecl>(DC);
88}
89
90static const RecordDecl *GetLocalClassDecl(const Decl *D) {
91 const DeclContext *DC = getEffectiveDeclContext(D);
92 while (!DC->isNamespace() && !DC->isTranslationUnit()) {
93 if (isLocalContainerContext(DC))
94 return dyn_cast<RecordDecl>(D);
95 D = cast<Decl>(DC);
96 DC = getEffectiveDeclContext(D);
97 }
98 return nullptr;
99}
100
101static const FunctionDecl *getStructor(const FunctionDecl *fn) {
102 if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate())
103 return ftd->getTemplatedDecl();
104
105 return fn;
106}
107
108static const NamedDecl *getStructor(const NamedDecl *decl) {
109 const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl);
110 return (fn ? getStructor(fn) : decl);
111}
112
113static bool isLambda(const NamedDecl *ND) {
114 const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(ND);
115 if (!Record)
116 return false;
117
118 return Record->isLambda();
119}
120
121static const unsigned UnknownArity = ~0U;
122
123class ItaniumMangleContextImpl : public ItaniumMangleContext {
124 typedef std::pair<const DeclContext*, IdentifierInfo*> DiscriminatorKeyTy;
125 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
126 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier;
127
128 bool IsDevCtx = false;
129 bool NeedsUniqueInternalLinkageNames = false;
130
131public:
132 explicit ItaniumMangleContextImpl(ASTContext &Context,
133 DiagnosticsEngine &Diags)
134 : ItaniumMangleContext(Context, Diags) {}
135
136 /// @name Mangler Entry Points
137 /// @{
138
139 bool shouldMangleCXXName(const NamedDecl *D) override;
140 bool shouldMangleStringLiteral(const StringLiteral *) override {
141 return false;
142 }
143
144 bool isUniqueInternalLinkageDecl(const NamedDecl *ND) override;
145 void needsUniqueInternalLinkageNames() override {
146 NeedsUniqueInternalLinkageNames = true;
147 }
148
149 bool isDeviceMangleContext() const override { return IsDevCtx; }
150 void setDeviceMangleContext(bool IsDev) override { IsDevCtx = IsDev; }
151
152 void mangleCXXName(GlobalDecl GD, raw_ostream &) override;
153 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
154 raw_ostream &) override;
155 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
156 const ThisAdjustment &ThisAdjustment,
157 raw_ostream &) override;
158 void mangleReferenceTemporary(const VarDecl *D, unsigned ManglingNumber,
159 raw_ostream &) override;
160 void mangleCXXVTable(const CXXRecordDecl *RD, raw_ostream &) override;
161 void mangleCXXVTT(const CXXRecordDecl *RD, raw_ostream &) override;
162 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
163 const CXXRecordDecl *Type, raw_ostream &) override;
164 void mangleCXXRTTI(QualType T, raw_ostream &) override;
165 void mangleCXXRTTIName(QualType T, raw_ostream &) override;
166 void mangleTypeName(QualType T, raw_ostream &) override;
167
168 void mangleCXXCtorComdat(const CXXConstructorDecl *D, raw_ostream &) override;
169 void mangleCXXDtorComdat(const CXXDestructorDecl *D, raw_ostream &) override;
170 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &) override;
171 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
172 void mangleDynamicAtExitDestructor(const VarDecl *D,
173 raw_ostream &Out) override;
174 void mangleDynamicStermFinalizer(const VarDecl *D, raw_ostream &Out) override;
175 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
176 raw_ostream &Out) override;
177 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
178 raw_ostream &Out) override;
179 void mangleItaniumThreadLocalInit(const VarDecl *D, raw_ostream &) override;
180 void mangleItaniumThreadLocalWrapper(const VarDecl *D,
181 raw_ostream &) override;
182
183 void mangleStringLiteral(const StringLiteral *, raw_ostream &) override;
184
185 void mangleLambdaSig(const CXXRecordDecl *Lambda, raw_ostream &) override;
186
187 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
188 // Lambda closure types are already numbered.
189 if (isLambda(ND))
190 return false;
191
192 // Anonymous tags are already numbered.
193 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
194 if (Tag->getName().empty() && !Tag->getTypedefNameForAnonDecl())
195 return false;
196 }
197
198 // Use the canonical number for externally visible decls.
199 if (ND->isExternallyVisible()) {
200 unsigned discriminator = getASTContext().getManglingNumber(ND);
201 if (discriminator == 1)
202 return false;
203 disc = discriminator - 2;
204 return true;
205 }
206
207 // Make up a reasonable number for internal decls.
208 unsigned &discriminator = Uniquifier[ND];
209 if (!discriminator) {
210 const DeclContext *DC = getEffectiveDeclContext(ND);
211 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
212 }
213 if (discriminator == 1)
214 return false;
215 disc = discriminator-2;
216 return true;
217 }
218
219 std::string getLambdaString(const CXXRecordDecl *Lambda) override {
220 // This function matches the one in MicrosoftMangle, which returns
221 // the string that is used in lambda mangled names.
222 assert(Lambda->isLambda() && "RD must be a lambda!")((Lambda->isLambda() && "RD must be a lambda!") ? static_cast
<void> (0) : __assert_fail ("Lambda->isLambda() && \"RD must be a lambda!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 222, __PRETTY_FUNCTION__))
;
223 std::string Name("<lambda");
224 Decl *LambdaContextDecl = Lambda->getLambdaContextDecl();
225 unsigned LambdaManglingNumber = Lambda->getLambdaManglingNumber();
226 unsigned LambdaId;
227 const ParmVarDecl *Parm = dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
228 const FunctionDecl *Func =
229 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
230
231 if (Func) {
232 unsigned DefaultArgNo =
233 Func->getNumParams() - Parm->getFunctionScopeIndex();
234 Name += llvm::utostr(DefaultArgNo);
235 Name += "_";
236 }
237
238 if (LambdaManglingNumber)
239 LambdaId = LambdaManglingNumber;
240 else
241 LambdaId = getAnonymousStructIdForDebugInfo(Lambda);
242
243 Name += llvm::utostr(LambdaId);
244 Name += '>';
245 return Name;
246 }
247
248 /// @}
249};
250
251/// Manage the mangling of a single name.
252class CXXNameMangler {
253 ItaniumMangleContextImpl &Context;
254 raw_ostream &Out;
255 bool NullOut = false;
256 /// In the "DisableDerivedAbiTags" mode derived ABI tags are not calculated.
257 /// This mode is used when mangler creates another mangler recursively to
258 /// calculate ABI tags for the function return value or the variable type.
259 /// Also it is required to avoid infinite recursion in some cases.
260 bool DisableDerivedAbiTags = false;
261
262 /// The "structor" is the top-level declaration being mangled, if
263 /// that's not a template specialization; otherwise it's the pattern
264 /// for that specialization.
265 const NamedDecl *Structor;
266 unsigned StructorType;
267
268 /// The next substitution sequence number.
269 unsigned SeqID;
270
271 class FunctionTypeDepthState {
272 unsigned Bits;
273
274 enum { InResultTypeMask = 1 };
275
276 public:
277 FunctionTypeDepthState() : Bits(0) {}
278
279 /// The number of function types we're inside.
280 unsigned getDepth() const {
281 return Bits >> 1;
282 }
283
284 /// True if we're in the return type of the innermost function type.
285 bool isInResultType() const {
286 return Bits & InResultTypeMask;
287 }
288
289 FunctionTypeDepthState push() {
290 FunctionTypeDepthState tmp = *this;
291 Bits = (Bits & ~InResultTypeMask) + 2;
292 return tmp;
293 }
294
295 void enterResultType() {
296 Bits |= InResultTypeMask;
297 }
298
299 void leaveResultType() {
300 Bits &= ~InResultTypeMask;
301 }
302
303 void pop(FunctionTypeDepthState saved) {
304 assert(getDepth() == saved.getDepth() + 1)((getDepth() == saved.getDepth() + 1) ? static_cast<void>
(0) : __assert_fail ("getDepth() == saved.getDepth() + 1", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 304, __PRETTY_FUNCTION__))
;
305 Bits = saved.Bits;
306 }
307
308 } FunctionTypeDepth;
309
310 // abi_tag is a gcc attribute, taking one or more strings called "tags".
311 // The goal is to annotate against which version of a library an object was
312 // built and to be able to provide backwards compatibility ("dual abi").
313 // For more information see docs/ItaniumMangleAbiTags.rst.
314 typedef SmallVector<StringRef, 4> AbiTagList;
315
316 // State to gather all implicit and explicit tags used in a mangled name.
317 // Must always have an instance of this while emitting any name to keep
318 // track.
319 class AbiTagState final {
320 public:
321 explicit AbiTagState(AbiTagState *&Head) : LinkHead(Head) {
322 Parent = LinkHead;
323 LinkHead = this;
324 }
325
326 // No copy, no move.
327 AbiTagState(const AbiTagState &) = delete;
328 AbiTagState &operator=(const AbiTagState &) = delete;
329
330 ~AbiTagState() { pop(); }
331
332 void write(raw_ostream &Out, const NamedDecl *ND,
333 const AbiTagList *AdditionalAbiTags) {
334 ND = cast<NamedDecl>(ND->getCanonicalDecl());
19
Called C++ object pointer is null
335 if (!isa<FunctionDecl>(ND) && !isa<VarDecl>(ND)) {
336 assert(((!AdditionalAbiTags && "only function and variables need a list of additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"only function and variables need a list of additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 338, __PRETTY_FUNCTION__))
337 !AdditionalAbiTags &&((!AdditionalAbiTags && "only function and variables need a list of additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"only function and variables need a list of additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 338, __PRETTY_FUNCTION__))
338 "only function and variables need a list of additional abi tags")((!AdditionalAbiTags && "only function and variables need a list of additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"only function and variables need a list of additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 338, __PRETTY_FUNCTION__))
;
339 if (const auto *NS = dyn_cast<NamespaceDecl>(ND)) {
340 if (const auto *AbiTag = NS->getAttr<AbiTagAttr>()) {
341 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
342 AbiTag->tags().end());
343 }
344 // Don't emit abi tags for namespaces.
345 return;
346 }
347 }
348
349 AbiTagList TagList;
350 if (const auto *AbiTag = ND->getAttr<AbiTagAttr>()) {
351 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
352 AbiTag->tags().end());
353 TagList.insert(TagList.end(), AbiTag->tags().begin(),
354 AbiTag->tags().end());
355 }
356
357 if (AdditionalAbiTags) {
358 UsedAbiTags.insert(UsedAbiTags.end(), AdditionalAbiTags->begin(),
359 AdditionalAbiTags->end());
360 TagList.insert(TagList.end(), AdditionalAbiTags->begin(),
361 AdditionalAbiTags->end());
362 }
363
364 llvm::sort(TagList);
365 TagList.erase(std::unique(TagList.begin(), TagList.end()), TagList.end());
366
367 writeSortedUniqueAbiTags(Out, TagList);
368 }
369
370 const AbiTagList &getUsedAbiTags() const { return UsedAbiTags; }
371 void setUsedAbiTags(const AbiTagList &AbiTags) {
372 UsedAbiTags = AbiTags;
373 }
374
375 const AbiTagList &getEmittedAbiTags() const {
376 return EmittedAbiTags;
377 }
378
379 const AbiTagList &getSortedUniqueUsedAbiTags() {
380 llvm::sort(UsedAbiTags);
381 UsedAbiTags.erase(std::unique(UsedAbiTags.begin(), UsedAbiTags.end()),
382 UsedAbiTags.end());
383 return UsedAbiTags;
384 }
385
386 private:
387 //! All abi tags used implicitly or explicitly.
388 AbiTagList UsedAbiTags;
389 //! All explicit abi tags (i.e. not from namespace).
390 AbiTagList EmittedAbiTags;
391
392 AbiTagState *&LinkHead;
393 AbiTagState *Parent = nullptr;
394
395 void pop() {
396 assert(LinkHead == this &&((LinkHead == this && "abi tag link head must point to us on destruction"
) ? static_cast<void> (0) : __assert_fail ("LinkHead == this && \"abi tag link head must point to us on destruction\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 397, __PRETTY_FUNCTION__))
397 "abi tag link head must point to us on destruction")((LinkHead == this && "abi tag link head must point to us on destruction"
) ? static_cast<void> (0) : __assert_fail ("LinkHead == this && \"abi tag link head must point to us on destruction\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 397, __PRETTY_FUNCTION__))
;
398 if (Parent) {
399 Parent->UsedAbiTags.insert(Parent->UsedAbiTags.end(),
400 UsedAbiTags.begin(), UsedAbiTags.end());
401 Parent->EmittedAbiTags.insert(Parent->EmittedAbiTags.end(),
402 EmittedAbiTags.begin(),
403 EmittedAbiTags.end());
404 }
405 LinkHead = Parent;
406 }
407
408 void writeSortedUniqueAbiTags(raw_ostream &Out, const AbiTagList &AbiTags) {
409 for (const auto &Tag : AbiTags) {
410 EmittedAbiTags.push_back(Tag);
411 Out << "B";
412 Out << Tag.size();
413 Out << Tag;
414 }
415 }
416 };
417
418 AbiTagState *AbiTags = nullptr;
419 AbiTagState AbiTagsRoot;
420
421 llvm::DenseMap<uintptr_t, unsigned> Substitutions;
422 llvm::DenseMap<StringRef, unsigned> ModuleSubstitutions;
423
424 ASTContext &getASTContext() const { return Context.getASTContext(); }
425
426public:
427 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
428 const NamedDecl *D = nullptr, bool NullOut_ = false)
429 : Context(C), Out(Out_), NullOut(NullOut_), Structor(getStructor(D)),
430 StructorType(0), SeqID(0), AbiTagsRoot(AbiTags) {
431 // These can't be mangled without a ctor type or dtor type.
432 assert(!D || (!isa<CXXDestructorDecl>(D) &&((!D || (!isa<CXXDestructorDecl>(D) && !isa<
CXXConstructorDecl>(D))) ? static_cast<void> (0) : __assert_fail
("!D || (!isa<CXXDestructorDecl>(D) && !isa<CXXConstructorDecl>(D))"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 433, __PRETTY_FUNCTION__))
433 !isa<CXXConstructorDecl>(D)))((!D || (!isa<CXXDestructorDecl>(D) && !isa<
CXXConstructorDecl>(D))) ? static_cast<void> (0) : __assert_fail
("!D || (!isa<CXXDestructorDecl>(D) && !isa<CXXConstructorDecl>(D))"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 433, __PRETTY_FUNCTION__))
;
434 }
435 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
436 const CXXConstructorDecl *D, CXXCtorType Type)
437 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
438 SeqID(0), AbiTagsRoot(AbiTags) { }
439 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
440 const CXXDestructorDecl *D, CXXDtorType Type)
441 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
442 SeqID(0), AbiTagsRoot(AbiTags) { }
443
444 CXXNameMangler(CXXNameMangler &Outer, raw_ostream &Out_)
445 : Context(Outer.Context), Out(Out_), NullOut(false),
446 Structor(Outer.Structor), StructorType(Outer.StructorType),
447 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
448 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
449
450 CXXNameMangler(CXXNameMangler &Outer, llvm::raw_null_ostream &Out_)
451 : Context(Outer.Context), Out(Out_), NullOut(true),
452 Structor(Outer.Structor), StructorType(Outer.StructorType),
453 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
454 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
455
456 raw_ostream &getStream() { return Out; }
457
458 void disableDerivedAbiTags() { DisableDerivedAbiTags = true; }
459 static bool shouldHaveAbiTags(ItaniumMangleContextImpl &C, const VarDecl *VD);
460
461 void mangle(GlobalDecl GD);
462 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual);
463 void mangleNumber(const llvm::APSInt &I);
464 void mangleNumber(int64_t Number);
465 void mangleFloat(const llvm::APFloat &F);
466 void mangleFunctionEncoding(GlobalDecl GD);
467 void mangleSeqID(unsigned SeqID);
468 void mangleName(GlobalDecl GD);
469 void mangleType(QualType T);
470 void mangleNameOrStandardSubstitution(const NamedDecl *ND);
471 void mangleLambdaSig(const CXXRecordDecl *Lambda);
472
473private:
474
475 bool mangleSubstitution(const NamedDecl *ND);
476 bool mangleSubstitution(QualType T);
477 bool mangleSubstitution(TemplateName Template);
478 bool mangleSubstitution(uintptr_t Ptr);
479
480 void mangleExistingSubstitution(TemplateName name);
481
482 bool mangleStandardSubstitution(const NamedDecl *ND);
483
484 void addSubstitution(const NamedDecl *ND) {
485 ND = cast<NamedDecl>(ND->getCanonicalDecl());
486
487 addSubstitution(reinterpret_cast<uintptr_t>(ND));
488 }
489 void addSubstitution(QualType T);
490 void addSubstitution(TemplateName Template);
491 void addSubstitution(uintptr_t Ptr);
492 // Destructive copy substitutions from other mangler.
493 void extendSubstitutions(CXXNameMangler* Other);
494
495 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
496 bool recursive = false);
497 void mangleUnresolvedName(NestedNameSpecifier *qualifier,
498 DeclarationName name,
499 const TemplateArgumentLoc *TemplateArgs,
500 unsigned NumTemplateArgs,
501 unsigned KnownArity = UnknownArity);
502
503 void mangleFunctionEncodingBareType(const FunctionDecl *FD);
504
505 void mangleNameWithAbiTags(GlobalDecl GD,
506 const AbiTagList *AdditionalAbiTags);
507 void mangleModuleName(const Module *M);
508 void mangleModuleNamePrefix(StringRef Name);
509 void mangleTemplateName(const TemplateDecl *TD,
510 const TemplateArgument *TemplateArgs,
511 unsigned NumTemplateArgs);
512 void mangleUnqualifiedName(GlobalDecl GD,
513 const AbiTagList *AdditionalAbiTags) {
514 mangleUnqualifiedName(GD, cast<NamedDecl>(GD.getDecl())->getDeclName(), UnknownArity,
515 AdditionalAbiTags);
516 }
517 void mangleUnqualifiedName(GlobalDecl GD, DeclarationName Name,
518 unsigned KnownArity,
519 const AbiTagList *AdditionalAbiTags);
520 void mangleUnscopedName(GlobalDecl GD,
521 const AbiTagList *AdditionalAbiTags);
522 void mangleUnscopedTemplateName(GlobalDecl GD,
523 const AbiTagList *AdditionalAbiTags);
524 void mangleSourceName(const IdentifierInfo *II);
525 void mangleRegCallName(const IdentifierInfo *II);
526 void mangleDeviceStubName(const IdentifierInfo *II);
527 void mangleSourceNameWithAbiTags(
528 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags = nullptr);
529 void mangleLocalName(GlobalDecl GD,
530 const AbiTagList *AdditionalAbiTags);
531 void mangleBlockForPrefix(const BlockDecl *Block);
532 void mangleUnqualifiedBlock(const BlockDecl *Block);
533 void mangleTemplateParamDecl(const NamedDecl *Decl);
534 void mangleLambda(const CXXRecordDecl *Lambda);
535 void mangleNestedName(GlobalDecl GD, const DeclContext *DC,
536 const AbiTagList *AdditionalAbiTags,
537 bool NoFunction=false);
538 void mangleNestedName(const TemplateDecl *TD,
539 const TemplateArgument *TemplateArgs,
540 unsigned NumTemplateArgs);
541 void manglePrefix(NestedNameSpecifier *qualifier);
542 void manglePrefix(const DeclContext *DC, bool NoFunction=false);
543 void manglePrefix(QualType type);
544 void mangleTemplatePrefix(GlobalDecl GD, bool NoFunction=false);
545 void mangleTemplatePrefix(TemplateName Template);
546 bool mangleUnresolvedTypeOrSimpleId(QualType DestroyedType,
547 StringRef Prefix = "");
548 void mangleOperatorName(DeclarationName Name, unsigned Arity);
549 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity);
550 void mangleVendorQualifier(StringRef qualifier);
551 void mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST = nullptr);
552 void mangleRefQualifier(RefQualifierKind RefQualifier);
553
554 void mangleObjCMethodName(const ObjCMethodDecl *MD);
555
556 // Declare manglers for every type class.
557#define ABSTRACT_TYPE(CLASS, PARENT)
558#define NON_CANONICAL_TYPE(CLASS, PARENT)
559#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T);
560#include "clang/AST/TypeNodes.inc"
561
562 void mangleType(const TagType*);
563 void mangleType(TemplateName);
564 static StringRef getCallingConvQualifierName(CallingConv CC);
565 void mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo info);
566 void mangleExtFunctionInfo(const FunctionType *T);
567 void mangleBareFunctionType(const FunctionProtoType *T, bool MangleReturnType,
568 const FunctionDecl *FD = nullptr);
569 void mangleNeonVectorType(const VectorType *T);
570 void mangleNeonVectorType(const DependentVectorType *T);
571 void mangleAArch64NeonVectorType(const VectorType *T);
572 void mangleAArch64NeonVectorType(const DependentVectorType *T);
573 void mangleAArch64FixedSveVectorType(const VectorType *T);
574 void mangleAArch64FixedSveVectorType(const DependentVectorType *T);
575
576 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value);
577 void mangleFloatLiteral(QualType T, const llvm::APFloat &V);
578 void mangleFixedPointLiteral();
579 void mangleNullPointer(QualType T);
580
581 void mangleMemberExprBase(const Expr *base, bool isArrow);
582 void mangleMemberExpr(const Expr *base, bool isArrow,
583 NestedNameSpecifier *qualifier,
584 NamedDecl *firstQualifierLookup,
585 DeclarationName name,
586 const TemplateArgumentLoc *TemplateArgs,
587 unsigned NumTemplateArgs,
588 unsigned knownArity);
589 void mangleCastExpression(const Expr *E, StringRef CastEncoding);
590 void mangleInitListElements(const InitListExpr *InitList);
591 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity,
592 bool AsTemplateArg = false);
593 void mangleCXXCtorType(CXXCtorType T, const CXXRecordDecl *InheritedFrom);
594 void mangleCXXDtorType(CXXDtorType T);
595
596 void mangleTemplateArgs(TemplateName TN,
597 const TemplateArgumentLoc *TemplateArgs,
598 unsigned NumTemplateArgs);
599 void mangleTemplateArgs(TemplateName TN, const TemplateArgument *TemplateArgs,
600 unsigned NumTemplateArgs);
601 void mangleTemplateArgs(TemplateName TN, const TemplateArgumentList &AL);
602 void mangleTemplateArg(TemplateArgument A, bool NeedExactType);
603 void mangleTemplateArgExpr(const Expr *E);
604 void mangleValueInTemplateArg(QualType T, const APValue &V, bool TopLevel,
605 bool NeedExactType = false);
606
607 void mangleTemplateParameter(unsigned Depth, unsigned Index);
608
609 void mangleFunctionParam(const ParmVarDecl *parm);
610
611 void writeAbiTags(const NamedDecl *ND,
612 const AbiTagList *AdditionalAbiTags);
613
614 // Returns sorted unique list of ABI tags.
615 AbiTagList makeFunctionReturnTypeTags(const FunctionDecl *FD);
616 // Returns sorted unique list of ABI tags.
617 AbiTagList makeVariableTypeTags(const VarDecl *VD);
618};
619
620}
621
622static bool isInternalLinkageDecl(const NamedDecl *ND) {
623 if (ND && ND->getFormalLinkage() == InternalLinkage &&
624 !ND->isExternallyVisible() &&
625 getEffectiveDeclContext(ND)->isFileContext() &&
626 !ND->isInAnonymousNamespace())
627 return true;
628 return false;
629}
630
631// Check if this Function Decl needs a unique internal linkage name.
632bool ItaniumMangleContextImpl::isUniqueInternalLinkageDecl(
633 const NamedDecl *ND) {
634 if (!NeedsUniqueInternalLinkageNames || !ND)
635 return false;
636
637 const auto *FD = dyn_cast<FunctionDecl>(ND);
638 if (!FD)
639 return false;
640
641 // For C functions without prototypes, return false as their
642 // names should not be mangled.
643 if (!FD->hasPrototype())
644 return false;
645
646 if (isInternalLinkageDecl(ND))
647 return true;
648
649 return false;
650}
651
652bool ItaniumMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
653 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
654 if (FD) {
655 LanguageLinkage L = FD->getLanguageLinkage();
656 // Overloadable functions need mangling.
657 if (FD->hasAttr<OverloadableAttr>())
658 return true;
659
660 // "main" is not mangled.
661 if (FD->isMain())
662 return false;
663
664 // The Windows ABI expects that we would never mangle "typical"
665 // user-defined entry points regardless of visibility or freestanding-ness.
666 //
667 // N.B. This is distinct from asking about "main". "main" has a lot of
668 // special rules associated with it in the standard while these
669 // user-defined entry points are outside of the purview of the standard.
670 // For example, there can be only one definition for "main" in a standards
671 // compliant program; however nothing forbids the existence of wmain and
672 // WinMain in the same translation unit.
673 if (FD->isMSVCRTEntryPoint())
674 return false;
675
676 // C++ functions and those whose names are not a simple identifier need
677 // mangling.
678 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
679 return true;
680
681 // C functions are not mangled.
682 if (L == CLanguageLinkage)
683 return false;
684 }
685
686 // Otherwise, no mangling is done outside C++ mode.
687 if (!getASTContext().getLangOpts().CPlusPlus)
688 return false;
689
690 const VarDecl *VD = dyn_cast<VarDecl>(D);
691 if (VD && !isa<DecompositionDecl>(D)) {
692 // C variables are not mangled.
693 if (VD->isExternC())
694 return false;
695
696 // Variables at global scope with non-internal linkage are not mangled
697 const DeclContext *DC = getEffectiveDeclContext(D);
698 // Check for extern variable declared locally.
699 if (DC->isFunctionOrMethod() && D->hasLinkage())
700 while (!DC->isNamespace() && !DC->isTranslationUnit())
701 DC = getEffectiveParentContext(DC);
702 if (DC->isTranslationUnit() && D->getFormalLinkage() != InternalLinkage &&
703 !CXXNameMangler::shouldHaveAbiTags(*this, VD) &&
704 !isa<VarTemplateSpecializationDecl>(D))
705 return false;
706 }
707
708 return true;
709}
710
711void CXXNameMangler::writeAbiTags(const NamedDecl *ND,
712 const AbiTagList *AdditionalAbiTags) {
713 assert(AbiTags && "require AbiTagState")((AbiTags && "require AbiTagState") ? static_cast<
void> (0) : __assert_fail ("AbiTags && \"require AbiTagState\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 713, __PRETTY_FUNCTION__))
;
13
Assuming field 'AbiTags' is non-null
14
'?' condition is true
714 AbiTags->write(Out, ND, DisableDerivedAbiTags ? nullptr : AdditionalAbiTags);
15
Assuming field 'DisableDerivedAbiTags' is true
16
'?' condition is true
17
Passing null pointer value via 2nd parameter 'ND'
18
Calling 'AbiTagState::write'
715}
716
717void CXXNameMangler::mangleSourceNameWithAbiTags(
718 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags) {
719 mangleSourceName(ND->getIdentifier());
720 writeAbiTags(ND, AdditionalAbiTags);
721}
722
723void CXXNameMangler::mangle(GlobalDecl GD) {
724 // <mangled-name> ::= _Z <encoding>
725 // ::= <data name>
726 // ::= <special-name>
727 Out << "_Z";
728 if (isa<FunctionDecl>(GD.getDecl()))
729 mangleFunctionEncoding(GD);
730 else if (isa<VarDecl, FieldDecl, MSGuidDecl, TemplateParamObjectDecl,
731 BindingDecl>(GD.getDecl()))
732 mangleName(GD);
733 else if (const IndirectFieldDecl *IFD =
734 dyn_cast<IndirectFieldDecl>(GD.getDecl()))
735 mangleName(IFD->getAnonField());
736 else
737 llvm_unreachable("unexpected kind of global decl")::llvm::llvm_unreachable_internal("unexpected kind of global decl"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 737)
;
738}
739
740void CXXNameMangler::mangleFunctionEncoding(GlobalDecl GD) {
741 const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl());
742 // <encoding> ::= <function name> <bare-function-type>
743
744 // Don't mangle in the type if this isn't a decl we should typically mangle.
745 if (!Context.shouldMangleDeclName(FD)) {
746 mangleName(GD);
747 return;
748 }
749
750 AbiTagList ReturnTypeAbiTags = makeFunctionReturnTypeTags(FD);
751 if (ReturnTypeAbiTags.empty()) {
752 // There are no tags for return type, the simplest case.
753 mangleName(GD);
754 mangleFunctionEncodingBareType(FD);
755 return;
756 }
757
758 // Mangle function name and encoding to temporary buffer.
759 // We have to output name and encoding to the same mangler to get the same
760 // substitution as it will be in final mangling.
761 SmallString<256> FunctionEncodingBuf;
762 llvm::raw_svector_ostream FunctionEncodingStream(FunctionEncodingBuf);
763 CXXNameMangler FunctionEncodingMangler(*this, FunctionEncodingStream);
764 // Output name of the function.
765 FunctionEncodingMangler.disableDerivedAbiTags();
766 FunctionEncodingMangler.mangleNameWithAbiTags(FD, nullptr);
767
768 // Remember length of the function name in the buffer.
769 size_t EncodingPositionStart = FunctionEncodingStream.str().size();
770 FunctionEncodingMangler.mangleFunctionEncodingBareType(FD);
771
772 // Get tags from return type that are not present in function name or
773 // encoding.
774 const AbiTagList &UsedAbiTags =
775 FunctionEncodingMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
776 AbiTagList AdditionalAbiTags(ReturnTypeAbiTags.size());
777 AdditionalAbiTags.erase(
778 std::set_difference(ReturnTypeAbiTags.begin(), ReturnTypeAbiTags.end(),
779 UsedAbiTags.begin(), UsedAbiTags.end(),
780 AdditionalAbiTags.begin()),
781 AdditionalAbiTags.end());
782
783 // Output name with implicit tags and function encoding from temporary buffer.
784 mangleNameWithAbiTags(FD, &AdditionalAbiTags);
785 Out << FunctionEncodingStream.str().substr(EncodingPositionStart);
786
787 // Function encoding could create new substitutions so we have to add
788 // temp mangled substitutions to main mangler.
789 extendSubstitutions(&FunctionEncodingMangler);
790}
791
792void CXXNameMangler::mangleFunctionEncodingBareType(const FunctionDecl *FD) {
793 if (FD->hasAttr<EnableIfAttr>()) {
794 FunctionTypeDepthState Saved = FunctionTypeDepth.push();
795 Out << "Ua9enable_ifI";
796 for (AttrVec::const_iterator I = FD->getAttrs().begin(),
797 E = FD->getAttrs().end();
798 I != E; ++I) {
799 EnableIfAttr *EIA = dyn_cast<EnableIfAttr>(*I);
800 if (!EIA)
801 continue;
802 if (Context.getASTContext().getLangOpts().getClangABICompat() >
803 LangOptions::ClangABI::Ver11) {
804 mangleTemplateArgExpr(EIA->getCond());
805 } else {
806 // Prior to Clang 12, we hardcoded the X/E around enable-if's argument,
807 // even though <template-arg> should not include an X/E around
808 // <expr-primary>.
809 Out << 'X';
810 mangleExpression(EIA->getCond());
811 Out << 'E';
812 }
813 }
814 Out << 'E';
815 FunctionTypeDepth.pop(Saved);
816 }
817
818 // When mangling an inheriting constructor, the bare function type used is
819 // that of the inherited constructor.
820 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
821 if (auto Inherited = CD->getInheritedConstructor())
822 FD = Inherited.getConstructor();
823
824 // Whether the mangling of a function type includes the return type depends on
825 // the context and the nature of the function. The rules for deciding whether
826 // the return type is included are:
827 //
828 // 1. Template functions (names or types) have return types encoded, with
829 // the exceptions listed below.
830 // 2. Function types not appearing as part of a function name mangling,
831 // e.g. parameters, pointer types, etc., have return type encoded, with the
832 // exceptions listed below.
833 // 3. Non-template function names do not have return types encoded.
834 //
835 // The exceptions mentioned in (1) and (2) above, for which the return type is
836 // never included, are
837 // 1. Constructors.
838 // 2. Destructors.
839 // 3. Conversion operator functions, e.g. operator int.
840 bool MangleReturnType = false;
841 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) {
842 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) ||
843 isa<CXXConversionDecl>(FD)))
844 MangleReturnType = true;
845
846 // Mangle the type of the primary template.
847 FD = PrimaryTemplate->getTemplatedDecl();
848 }
849
850 mangleBareFunctionType(FD->getType()->castAs<FunctionProtoType>(),
851 MangleReturnType, FD);
852}
853
854static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) {
855 while (isa<LinkageSpecDecl>(DC)) {
856 DC = getEffectiveParentContext(DC);
857 }
858
859 return DC;
860}
861
862/// Return whether a given namespace is the 'std' namespace.
863static bool isStd(const NamespaceDecl *NS) {
864 if (!IgnoreLinkageSpecDecls(getEffectiveParentContext(NS))
865 ->isTranslationUnit())
866 return false;
867
868 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier();
869 return II && II->isStr("std");
870}
871
872// isStdNamespace - Return whether a given decl context is a toplevel 'std'
873// namespace.
874static bool isStdNamespace(const DeclContext *DC) {
875 if (!DC->isNamespace())
876 return false;
877
878 return isStd(cast<NamespaceDecl>(DC));
879}
880
881static const GlobalDecl
882isTemplate(GlobalDecl GD, const TemplateArgumentList *&TemplateArgs) {
883 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
884 // Check if we have a function template.
885 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
886 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
887 TemplateArgs = FD->getTemplateSpecializationArgs();
888 return GD.getWithDecl(TD);
889 }
890 }
891
892 // Check if we have a class template.
893 if (const ClassTemplateSpecializationDecl *Spec =
894 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
895 TemplateArgs = &Spec->getTemplateArgs();
896 return GD.getWithDecl(Spec->getSpecializedTemplate());
897 }
898
899 // Check if we have a variable template.
900 if (const VarTemplateSpecializationDecl *Spec =
901 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
902 TemplateArgs = &Spec->getTemplateArgs();
903 return GD.getWithDecl(Spec->getSpecializedTemplate());
904 }
905
906 return GlobalDecl();
907}
908
909static TemplateName asTemplateName(GlobalDecl GD) {
910 const TemplateDecl *TD = dyn_cast_or_null<TemplateDecl>(GD.getDecl());
911 return TemplateName(const_cast<TemplateDecl*>(TD));
912}
913
914void CXXNameMangler::mangleName(GlobalDecl GD) {
915 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
916 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
917 // Variables should have implicit tags from its type.
918 AbiTagList VariableTypeAbiTags = makeVariableTypeTags(VD);
919 if (VariableTypeAbiTags.empty()) {
920 // Simple case no variable type tags.
921 mangleNameWithAbiTags(VD, nullptr);
922 return;
923 }
924
925 // Mangle variable name to null stream to collect tags.
926 llvm::raw_null_ostream NullOutStream;
927 CXXNameMangler VariableNameMangler(*this, NullOutStream);
928 VariableNameMangler.disableDerivedAbiTags();
929 VariableNameMangler.mangleNameWithAbiTags(VD, nullptr);
930
931 // Get tags from variable type that are not present in its name.
932 const AbiTagList &UsedAbiTags =
933 VariableNameMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
934 AbiTagList AdditionalAbiTags(VariableTypeAbiTags.size());
935 AdditionalAbiTags.erase(
936 std::set_difference(VariableTypeAbiTags.begin(),
937 VariableTypeAbiTags.end(), UsedAbiTags.begin(),
938 UsedAbiTags.end(), AdditionalAbiTags.begin()),
939 AdditionalAbiTags.end());
940
941 // Output name with implicit tags.
942 mangleNameWithAbiTags(VD, &AdditionalAbiTags);
943 } else {
944 mangleNameWithAbiTags(GD, nullptr);
945 }
946}
947
948void CXXNameMangler::mangleNameWithAbiTags(GlobalDecl GD,
949 const AbiTagList *AdditionalAbiTags) {
950 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
951 // <name> ::= [<module-name>] <nested-name>
952 // ::= [<module-name>] <unscoped-name>
953 // ::= [<module-name>] <unscoped-template-name> <template-args>
954 // ::= <local-name>
955 //
956 const DeclContext *DC = getEffectiveDeclContext(ND);
957
958 // If this is an extern variable declared locally, the relevant DeclContext
959 // is that of the containing namespace, or the translation unit.
960 // FIXME: This is a hack; extern variables declared locally should have
961 // a proper semantic declaration context!
962 if (isLocalContainerContext(DC) && ND->hasLinkage() && !isLambda(ND))
963 while (!DC->isNamespace() && !DC->isTranslationUnit())
964 DC = getEffectiveParentContext(DC);
965 else if (GetLocalClassDecl(ND)) {
966 mangleLocalName(GD, AdditionalAbiTags);
967 return;
968 }
969
970 DC = IgnoreLinkageSpecDecls(DC);
971
972 if (isLocalContainerContext(DC)) {
973 mangleLocalName(GD, AdditionalAbiTags);
974 return;
975 }
976
977 // Do not mangle the owning module for an external linkage declaration.
978 // This enables backwards-compatibility with non-modular code, and is
979 // a valid choice since conflicts are not permitted by C++ Modules TS
980 // [basic.def.odr]/6.2.
981 if (!ND->hasExternalFormalLinkage())
982 if (Module *M = ND->getOwningModuleForLinkage())
983 mangleModuleName(M);
984
985 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
986 // Check if we have a template.
987 const TemplateArgumentList *TemplateArgs = nullptr;
988 if (GlobalDecl TD = isTemplate(GD, TemplateArgs)) {
989 mangleUnscopedTemplateName(TD, AdditionalAbiTags);
990 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
991 return;
992 }
993
994 mangleUnscopedName(GD, AdditionalAbiTags);
995 return;
996 }
997
998 mangleNestedName(GD, DC, AdditionalAbiTags);
999}
1000
1001void CXXNameMangler::mangleModuleName(const Module *M) {
1002 // Implement the C++ Modules TS name mangling proposal; see
1003 // https://gcc.gnu.org/wiki/cxx-modules?action=AttachFile
1004 //
1005 // <module-name> ::= W <unscoped-name>+ E
1006 // ::= W <module-subst> <unscoped-name>* E
1007 Out << 'W';
1008 mangleModuleNamePrefix(M->Name);
1009 Out << 'E';
1010}
1011
1012void CXXNameMangler::mangleModuleNamePrefix(StringRef Name) {
1013 // <module-subst> ::= _ <seq-id> # 0 < seq-id < 10
1014 // ::= W <seq-id - 10> _ # otherwise
1015 auto It = ModuleSubstitutions.find(Name);
1016 if (It != ModuleSubstitutions.end()) {
1017 if (It->second < 10)
1018 Out << '_' << static_cast<char>('0' + It->second);
1019 else
1020 Out << 'W' << (It->second - 10) << '_';
1021 return;
1022 }
1023
1024 // FIXME: Preserve hierarchy in module names rather than flattening
1025 // them to strings; use Module*s as substitution keys.
1026 auto Parts = Name.rsplit('.');
1027 if (Parts.second.empty())
1028 Parts.second = Parts.first;
1029 else
1030 mangleModuleNamePrefix(Parts.first);
1031
1032 Out << Parts.second.size() << Parts.second;
1033 ModuleSubstitutions.insert({Name, ModuleSubstitutions.size()});
1034}
1035
1036void CXXNameMangler::mangleTemplateName(const TemplateDecl *TD,
1037 const TemplateArgument *TemplateArgs,
1038 unsigned NumTemplateArgs) {
1039 const DeclContext *DC = IgnoreLinkageSpecDecls(getEffectiveDeclContext(TD));
1040
1041 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
1042 mangleUnscopedTemplateName(TD, nullptr);
1043 mangleTemplateArgs(asTemplateName(TD), TemplateArgs, NumTemplateArgs);
1044 } else {
1045 mangleNestedName(TD, TemplateArgs, NumTemplateArgs);
1046 }
1047}
1048
1049void CXXNameMangler::mangleUnscopedName(GlobalDecl GD,
1050 const AbiTagList *AdditionalAbiTags) {
1051 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
1052 // <unscoped-name> ::= <unqualified-name>
1053 // ::= St <unqualified-name> # ::std::
1054
1055 if (isStdNamespace(IgnoreLinkageSpecDecls(getEffectiveDeclContext(ND))))
1056 Out << "St";
1057
1058 mangleUnqualifiedName(GD, AdditionalAbiTags);
1059}
1060
1061void CXXNameMangler::mangleUnscopedTemplateName(
1062 GlobalDecl GD, const AbiTagList *AdditionalAbiTags) {
1063 const TemplateDecl *ND = cast<TemplateDecl>(GD.getDecl());
1064 // <unscoped-template-name> ::= <unscoped-name>
1065 // ::= <substitution>
1066 if (mangleSubstitution(ND))
1067 return;
1068
1069 // <template-template-param> ::= <template-param>
1070 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
1071 assert(!AdditionalAbiTags &&((!AdditionalAbiTags && "template template param cannot have abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"template template param cannot have abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1072, __PRETTY_FUNCTION__))
1072 "template template param cannot have abi tags")((!AdditionalAbiTags && "template template param cannot have abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"template template param cannot have abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1072, __PRETTY_FUNCTION__))
;
1073 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
1074 } else if (isa<BuiltinTemplateDecl>(ND) || isa<ConceptDecl>(ND)) {
1075 mangleUnscopedName(GD, AdditionalAbiTags);
1076 } else {
1077 mangleUnscopedName(GD.getWithDecl(ND->getTemplatedDecl()), AdditionalAbiTags);
1078 }
1079
1080 addSubstitution(ND);
1081}
1082
1083void CXXNameMangler::mangleFloat(const llvm::APFloat &f) {
1084 // ABI:
1085 // Floating-point literals are encoded using a fixed-length
1086 // lowercase hexadecimal string corresponding to the internal
1087 // representation (IEEE on Itanium), high-order bytes first,
1088 // without leading zeroes. For example: "Lf bf800000 E" is -1.0f
1089 // on Itanium.
1090 // The 'without leading zeroes' thing seems to be an editorial
1091 // mistake; see the discussion on cxx-abi-dev beginning on
1092 // 2012-01-16.
1093
1094 // Our requirements here are just barely weird enough to justify
1095 // using a custom algorithm instead of post-processing APInt::toString().
1096
1097 llvm::APInt valueBits = f.bitcastToAPInt();
1098 unsigned numCharacters = (valueBits.getBitWidth() + 3) / 4;
1099 assert(numCharacters != 0)((numCharacters != 0) ? static_cast<void> (0) : __assert_fail
("numCharacters != 0", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1099, __PRETTY_FUNCTION__))
;
1100
1101 // Allocate a buffer of the right number of characters.
1102 SmallVector<char, 20> buffer(numCharacters);
1103
1104 // Fill the buffer left-to-right.
1105 for (unsigned stringIndex = 0; stringIndex != numCharacters; ++stringIndex) {
1106 // The bit-index of the next hex digit.
1107 unsigned digitBitIndex = 4 * (numCharacters - stringIndex - 1);
1108
1109 // Project out 4 bits starting at 'digitIndex'.
1110 uint64_t hexDigit = valueBits.getRawData()[digitBitIndex / 64];
1111 hexDigit >>= (digitBitIndex % 64);
1112 hexDigit &= 0xF;
1113
1114 // Map that over to a lowercase hex digit.
1115 static const char charForHex[16] = {
1116 '0', '1', '2', '3', '4', '5', '6', '7',
1117 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
1118 };
1119 buffer[stringIndex] = charForHex[hexDigit];
1120 }
1121
1122 Out.write(buffer.data(), numCharacters);
1123}
1124
1125void CXXNameMangler::mangleFloatLiteral(QualType T, const llvm::APFloat &V) {
1126 Out << 'L';
1127 mangleType(T);
1128 mangleFloat(V);
1129 Out << 'E';
1130}
1131
1132void CXXNameMangler::mangleFixedPointLiteral() {
1133 DiagnosticsEngine &Diags = Context.getDiags();
1134 unsigned DiagID = Diags.getCustomDiagID(
1135 DiagnosticsEngine::Error, "cannot mangle fixed point literals yet");
1136 Diags.Report(DiagID);
1137}
1138
1139void CXXNameMangler::mangleNullPointer(QualType T) {
1140 // <expr-primary> ::= L <type> 0 E
1141 Out << 'L';
1142 mangleType(T);
1143 Out << "0E";
1144}
1145
1146void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) {
1147 if (Value.isSigned() && Value.isNegative()) {
1148 Out << 'n';
1149 Value.abs().print(Out, /*signed*/ false);
1150 } else {
1151 Value.print(Out, /*signed*/ false);
1152 }
1153}
1154
1155void CXXNameMangler::mangleNumber(int64_t Number) {
1156 // <number> ::= [n] <non-negative decimal integer>
1157 if (Number < 0) {
1158 Out << 'n';
1159 Number = -Number;
1160 }
1161
1162 Out << Number;
1163}
1164
1165void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) {
1166 // <call-offset> ::= h <nv-offset> _
1167 // ::= v <v-offset> _
1168 // <nv-offset> ::= <offset number> # non-virtual base override
1169 // <v-offset> ::= <offset number> _ <virtual offset number>
1170 // # virtual base override, with vcall offset
1171 if (!Virtual) {
1172 Out << 'h';
1173 mangleNumber(NonVirtual);
1174 Out << '_';
1175 return;
1176 }
1177
1178 Out << 'v';
1179 mangleNumber(NonVirtual);
1180 Out << '_';
1181 mangleNumber(Virtual);
1182 Out << '_';
1183}
1184
1185void CXXNameMangler::manglePrefix(QualType type) {
1186 if (const auto *TST = type->getAs<TemplateSpecializationType>()) {
1187 if (!mangleSubstitution(QualType(TST, 0))) {
1188 mangleTemplatePrefix(TST->getTemplateName());
1189
1190 // FIXME: GCC does not appear to mangle the template arguments when
1191 // the template in question is a dependent template name. Should we
1192 // emulate that badness?
1193 mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(),
1194 TST->getNumArgs());
1195 addSubstitution(QualType(TST, 0));
1196 }
1197 } else if (const auto *DTST =
1198 type->getAs<DependentTemplateSpecializationType>()) {
1199 if (!mangleSubstitution(QualType(DTST, 0))) {
1200 TemplateName Template = getASTContext().getDependentTemplateName(
1201 DTST->getQualifier(), DTST->getIdentifier());
1202 mangleTemplatePrefix(Template);
1203
1204 // FIXME: GCC does not appear to mangle the template arguments when
1205 // the template in question is a dependent template name. Should we
1206 // emulate that badness?
1207 mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs());
1208 addSubstitution(QualType(DTST, 0));
1209 }
1210 } else {
1211 // We use the QualType mangle type variant here because it handles
1212 // substitutions.
1213 mangleType(type);
1214 }
1215}
1216
1217/// Mangle everything prior to the base-unresolved-name in an unresolved-name.
1218///
1219/// \param recursive - true if this is being called recursively,
1220/// i.e. if there is more prefix "to the right".
1221void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
1222 bool recursive) {
1223
1224 // x, ::x
1225 // <unresolved-name> ::= [gs] <base-unresolved-name>
1226
1227 // T::x / decltype(p)::x
1228 // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name>
1229
1230 // T::N::x /decltype(p)::N::x
1231 // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
1232 // <base-unresolved-name>
1233
1234 // A::x, N::y, A<T>::z; "gs" means leading "::"
1235 // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E
1236 // <base-unresolved-name>
1237
1238 switch (qualifier->getKind()) {
1239 case NestedNameSpecifier::Global:
1240 Out << "gs";
1241
1242 // We want an 'sr' unless this is the entire NNS.
1243 if (recursive)
1244 Out << "sr";
1245
1246 // We never want an 'E' here.
1247 return;
1248
1249 case NestedNameSpecifier::Super:
1250 llvm_unreachable("Can't mangle __super specifier")::llvm::llvm_unreachable_internal("Can't mangle __super specifier"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1250)
;
1251
1252 case NestedNameSpecifier::Namespace:
1253 if (qualifier->getPrefix())
1254 mangleUnresolvedPrefix(qualifier->getPrefix(),
1255 /*recursive*/ true);
1256 else
1257 Out << "sr";
1258 mangleSourceNameWithAbiTags(qualifier->getAsNamespace());
1259 break;
1260 case NestedNameSpecifier::NamespaceAlias:
1261 if (qualifier->getPrefix())
1262 mangleUnresolvedPrefix(qualifier->getPrefix(),
1263 /*recursive*/ true);
1264 else
1265 Out << "sr";
1266 mangleSourceNameWithAbiTags(qualifier->getAsNamespaceAlias());
1267 break;
1268
1269 case NestedNameSpecifier::TypeSpec:
1270 case NestedNameSpecifier::TypeSpecWithTemplate: {
1271 const Type *type = qualifier->getAsType();
1272
1273 // We only want to use an unresolved-type encoding if this is one of:
1274 // - a decltype
1275 // - a template type parameter
1276 // - a template template parameter with arguments
1277 // In all of these cases, we should have no prefix.
1278 if (qualifier->getPrefix()) {
1279 mangleUnresolvedPrefix(qualifier->getPrefix(),
1280 /*recursive*/ true);
1281 } else {
1282 // Otherwise, all the cases want this.
1283 Out << "sr";
1284 }
1285
1286 if (mangleUnresolvedTypeOrSimpleId(QualType(type, 0), recursive ? "N" : ""))
1287 return;
1288
1289 break;
1290 }
1291
1292 case NestedNameSpecifier::Identifier:
1293 // Member expressions can have these without prefixes.
1294 if (qualifier->getPrefix())
1295 mangleUnresolvedPrefix(qualifier->getPrefix(),
1296 /*recursive*/ true);
1297 else
1298 Out << "sr";
1299
1300 mangleSourceName(qualifier->getAsIdentifier());
1301 // An Identifier has no type information, so we can't emit abi tags for it.
1302 break;
1303 }
1304
1305 // If this was the innermost part of the NNS, and we fell out to
1306 // here, append an 'E'.
1307 if (!recursive)
1308 Out << 'E';
1309}
1310
1311/// Mangle an unresolved-name, which is generally used for names which
1312/// weren't resolved to specific entities.
1313void CXXNameMangler::mangleUnresolvedName(
1314 NestedNameSpecifier *qualifier, DeclarationName name,
1315 const TemplateArgumentLoc *TemplateArgs, unsigned NumTemplateArgs,
1316 unsigned knownArity) {
1317 if (qualifier) mangleUnresolvedPrefix(qualifier);
1318 switch (name.getNameKind()) {
1319 // <base-unresolved-name> ::= <simple-id>
1320 case DeclarationName::Identifier:
1321 mangleSourceName(name.getAsIdentifierInfo());
1322 break;
1323 // <base-unresolved-name> ::= dn <destructor-name>
1324 case DeclarationName::CXXDestructorName:
1325 Out << "dn";
1326 mangleUnresolvedTypeOrSimpleId(name.getCXXNameType());
1327 break;
1328 // <base-unresolved-name> ::= on <operator-name>
1329 case DeclarationName::CXXConversionFunctionName:
1330 case DeclarationName::CXXLiteralOperatorName:
1331 case DeclarationName::CXXOperatorName:
1332 Out << "on";
1333 mangleOperatorName(name, knownArity);
1334 break;
1335 case DeclarationName::CXXConstructorName:
1336 llvm_unreachable("Can't mangle a constructor name!")::llvm::llvm_unreachable_internal("Can't mangle a constructor name!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1336)
;
1337 case DeclarationName::CXXUsingDirective:
1338 llvm_unreachable("Can't mangle a using directive name!")::llvm::llvm_unreachable_internal("Can't mangle a using directive name!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1338)
;
1339 case DeclarationName::CXXDeductionGuideName:
1340 llvm_unreachable("Can't mangle a deduction guide name!")::llvm::llvm_unreachable_internal("Can't mangle a deduction guide name!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1340)
;
1341 case DeclarationName::ObjCMultiArgSelector:
1342 case DeclarationName::ObjCOneArgSelector:
1343 case DeclarationName::ObjCZeroArgSelector:
1344 llvm_unreachable("Can't mangle Objective-C selector names here!")::llvm::llvm_unreachable_internal("Can't mangle Objective-C selector names here!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1344)
;
1345 }
1346
1347 // The <simple-id> and on <operator-name> productions end in an optional
1348 // <template-args>.
1349 if (TemplateArgs)
1350 mangleTemplateArgs(TemplateName(), TemplateArgs, NumTemplateArgs);
1351}
1352
1353void CXXNameMangler::mangleUnqualifiedName(GlobalDecl GD,
1354 DeclarationName Name,
1355 unsigned KnownArity,
1356 const AbiTagList *AdditionalAbiTags) {
1357 const NamedDecl *ND = cast_or_null<NamedDecl>(GD.getDecl());
1
Assuming null pointer is passed into cast
2
'ND' initialized to a null pointer value
1358 unsigned Arity = KnownArity;
1359 // <unqualified-name> ::= <operator-name>
1360 // ::= <ctor-dtor-name>
1361 // ::= <source-name>
1362 switch (Name.getNameKind()) {
3
Calling 'DeclarationName::getNameKind'
7
Returning from 'DeclarationName::getNameKind'
8
Control jumps to 'case CXXDestructorName:' at line 1575
1363 case DeclarationName::Identifier: {
1364 const IdentifierInfo *II = Name.getAsIdentifierInfo();
1365
1366 // We mangle decomposition declarations as the names of their bindings.
1367 if (auto *DD = dyn_cast<DecompositionDecl>(ND)) {
1368 // FIXME: Non-standard mangling for decomposition declarations:
1369 //
1370 // <unqualified-name> ::= DC <source-name>* E
1371 //
1372 // These can never be referenced across translation units, so we do
1373 // not need a cross-vendor mangling for anything other than demanglers.
1374 // Proposed on cxx-abi-dev on 2016-08-12
1375 Out << "DC";
1376 for (auto *BD : DD->bindings())
1377 mangleSourceName(BD->getDeclName().getAsIdentifierInfo());
1378 Out << 'E';
1379 writeAbiTags(ND, AdditionalAbiTags);
1380 break;
1381 }
1382
1383 if (auto *GD = dyn_cast<MSGuidDecl>(ND)) {
1384 // We follow MSVC in mangling GUID declarations as if they were variables
1385 // with a particular reserved name. Continue the pretense here.
1386 SmallString<sizeof("_GUID_12345678_1234_1234_1234_1234567890ab")> GUID;
1387 llvm::raw_svector_ostream GUIDOS(GUID);
1388 Context.mangleMSGuidDecl(GD, GUIDOS);
1389 Out << GUID.size() << GUID;
1390 break;
1391 }
1392
1393 if (auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
1394 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/63.
1395 Out << "TA";
1396 mangleValueInTemplateArg(TPO->getType().getUnqualifiedType(),
1397 TPO->getValue(), /*TopLevel=*/true);
1398 break;
1399 }
1400
1401 if (II) {
1402 // Match GCC's naming convention for internal linkage symbols, for
1403 // symbols that are not actually visible outside of this TU. GCC
1404 // distinguishes between internal and external linkage symbols in
1405 // its mangling, to support cases like this that were valid C++ prior
1406 // to DR426:
1407 //
1408 // void test() { extern void foo(); }
1409 // static void foo();
1410 //
1411 // Don't bother with the L marker for names in anonymous namespaces; the
1412 // 12_GLOBAL__N_1 mangling is quite sufficient there, and this better
1413 // matches GCC anyway, because GCC does not treat anonymous namespaces as
1414 // implying internal linkage.
1415 if (isInternalLinkageDecl(ND))
1416 Out << 'L';
1417
1418 auto *FD = dyn_cast<FunctionDecl>(ND);
1419 bool IsRegCall = FD &&
1420 FD->getType()->castAs<FunctionType>()->getCallConv() ==
1421 clang::CC_X86RegCall;
1422 bool IsDeviceStub =
1423 FD && FD->hasAttr<CUDAGlobalAttr>() &&
1424 GD.getKernelReferenceKind() == KernelReferenceKind::Stub;
1425 if (IsDeviceStub)
1426 mangleDeviceStubName(II);
1427 else if (IsRegCall)
1428 mangleRegCallName(II);
1429 else
1430 mangleSourceName(II);
1431
1432 writeAbiTags(ND, AdditionalAbiTags);
1433 break;
1434 }
1435
1436 // Otherwise, an anonymous entity. We must have a declaration.
1437 assert(ND && "mangling empty name without declaration")((ND && "mangling empty name without declaration") ? static_cast
<void> (0) : __assert_fail ("ND && \"mangling empty name without declaration\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1437, __PRETTY_FUNCTION__))
;
1438
1439 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
1440 if (NS->isAnonymousNamespace()) {
1441 // This is how gcc mangles these names.
1442 Out << "12_GLOBAL__N_1";
1443 break;
1444 }
1445 }
1446
1447 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
1448 // We must have an anonymous union or struct declaration.
1449 const RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
1450
1451 // Itanium C++ ABI 5.1.2:
1452 //
1453 // For the purposes of mangling, the name of an anonymous union is
1454 // considered to be the name of the first named data member found by a
1455 // pre-order, depth-first, declaration-order walk of the data members of
1456 // the anonymous union. If there is no such data member (i.e., if all of
1457 // the data members in the union are unnamed), then there is no way for
1458 // a program to refer to the anonymous union, and there is therefore no
1459 // need to mangle its name.
1460 assert(RD->isAnonymousStructOrUnion()((RD->isAnonymousStructOrUnion() && "Expected anonymous struct or union!"
) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"Expected anonymous struct or union!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1461, __PRETTY_FUNCTION__))
1461 && "Expected anonymous struct or union!")((RD->isAnonymousStructOrUnion() && "Expected anonymous struct or union!"
) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"Expected anonymous struct or union!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1461, __PRETTY_FUNCTION__))
;
1462 const FieldDecl *FD = RD->findFirstNamedDataMember();
1463
1464 // It's actually possible for various reasons for us to get here
1465 // with an empty anonymous struct / union. Fortunately, it
1466 // doesn't really matter what name we generate.
1467 if (!FD) break;
1468 assert(FD->getIdentifier() && "Data member name isn't an identifier!")((FD->getIdentifier() && "Data member name isn't an identifier!"
) ? static_cast<void> (0) : __assert_fail ("FD->getIdentifier() && \"Data member name isn't an identifier!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1468, __PRETTY_FUNCTION__))
;
1469
1470 mangleSourceName(FD->getIdentifier());
1471 // Not emitting abi tags: internal name anyway.
1472 break;
1473 }
1474
1475 // Class extensions have no name as a category, and it's possible
1476 // for them to be the semantic parent of certain declarations
1477 // (primarily, tag decls defined within declarations). Such
1478 // declarations will always have internal linkage, so the name
1479 // doesn't really matter, but we shouldn't crash on them. For
1480 // safety, just handle all ObjC containers here.
1481 if (isa<ObjCContainerDecl>(ND))
1482 break;
1483
1484 // We must have an anonymous struct.
1485 const TagDecl *TD = cast<TagDecl>(ND);
1486 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
1487 assert(TD->getDeclContext() == D->getDeclContext() &&((TD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!") ? static_cast
<void> (0) : __assert_fail ("TD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1488, __PRETTY_FUNCTION__))
1488 "Typedef should not be in another decl context!")((TD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!") ? static_cast
<void> (0) : __assert_fail ("TD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1488, __PRETTY_FUNCTION__))
;
1489 assert(D->getDeclName().getAsIdentifierInfo() &&((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!"
) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1490, __PRETTY_FUNCTION__))
1490 "Typedef was not named!")((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!"
) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1490, __PRETTY_FUNCTION__))
;
1491 mangleSourceName(D->getDeclName().getAsIdentifierInfo());
1492 assert(!AdditionalAbiTags && "Type cannot have additional abi tags")((!AdditionalAbiTags && "Type cannot have additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"Type cannot have additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1492, __PRETTY_FUNCTION__))
;
1493 // Explicit abi tags are still possible; take from underlying type, not
1494 // from typedef.
1495 writeAbiTags(TD, nullptr);
1496 break;
1497 }
1498
1499 // <unnamed-type-name> ::= <closure-type-name>
1500 //
1501 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
1502 // <lambda-sig> ::= <template-param-decl>* <parameter-type>+
1503 // # Parameter types or 'v' for 'void'.
1504 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
1505 if (Record->isLambda() && Record->getLambdaManglingNumber()) {
1506 assert(!AdditionalAbiTags &&((!AdditionalAbiTags && "Lambda type cannot have additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"Lambda type cannot have additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1507, __PRETTY_FUNCTION__))
1507 "Lambda type cannot have additional abi tags")((!AdditionalAbiTags && "Lambda type cannot have additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"Lambda type cannot have additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1507, __PRETTY_FUNCTION__))
;
1508 mangleLambda(Record);
1509 break;
1510 }
1511 }
1512
1513 if (TD->isExternallyVisible()) {
1514 unsigned UnnamedMangle = getASTContext().getManglingNumber(TD);
1515 Out << "Ut";
1516 if (UnnamedMangle > 1)
1517 Out << UnnamedMangle - 2;
1518 Out << '_';
1519 writeAbiTags(TD, AdditionalAbiTags);
1520 break;
1521 }
1522
1523 // Get a unique id for the anonymous struct. If it is not a real output
1524 // ID doesn't matter so use fake one.
1525 unsigned AnonStructId = NullOut ? 0 : Context.getAnonymousStructId(TD);
1526
1527 // Mangle it as a source name in the form
1528 // [n] $_<id>
1529 // where n is the length of the string.
1530 SmallString<8> Str;
1531 Str += "$_";
1532 Str += llvm::utostr(AnonStructId);
1533
1534 Out << Str.size();
1535 Out << Str;
1536 break;
1537 }
1538
1539 case DeclarationName::ObjCZeroArgSelector:
1540 case DeclarationName::ObjCOneArgSelector:
1541 case DeclarationName::ObjCMultiArgSelector:
1542 llvm_unreachable("Can't mangle Objective-C selector names here!")::llvm::llvm_unreachable_internal("Can't mangle Objective-C selector names here!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1542)
;
1543
1544 case DeclarationName::CXXConstructorName: {
1545 const CXXRecordDecl *InheritedFrom = nullptr;
1546 TemplateName InheritedTemplateName;
1547 const TemplateArgumentList *InheritedTemplateArgs = nullptr;
1548 if (auto Inherited =
1549 cast<CXXConstructorDecl>(ND)->getInheritedConstructor()) {
1550 InheritedFrom = Inherited.getConstructor()->getParent();
1551 InheritedTemplateName =
1552 TemplateName(Inherited.getConstructor()->getPrimaryTemplate());
1553 InheritedTemplateArgs =
1554 Inherited.getConstructor()->getTemplateSpecializationArgs();
1555 }
1556
1557 if (ND == Structor)
1558 // If the named decl is the C++ constructor we're mangling, use the type
1559 // we were given.
1560 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType), InheritedFrom);
1561 else
1562 // Otherwise, use the complete constructor name. This is relevant if a
1563 // class with a constructor is declared within a constructor.
1564 mangleCXXCtorType(Ctor_Complete, InheritedFrom);
1565
1566 // FIXME: The template arguments are part of the enclosing prefix or
1567 // nested-name, but it's more convenient to mangle them here.
1568 if (InheritedTemplateArgs)
1569 mangleTemplateArgs(InheritedTemplateName, *InheritedTemplateArgs);
1570
1571 writeAbiTags(ND, AdditionalAbiTags);
1572 break;
1573 }
1574
1575 case DeclarationName::CXXDestructorName:
1576 if (ND == Structor)
9
Assuming 'ND' is not equal to field 'Structor'
10
Taking false branch
1577 // If the named decl is the C++ destructor we're mangling, use the type we
1578 // were given.
1579 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
1580 else
1581 // Otherwise, use the complete destructor name. This is relevant if a
1582 // class with a destructor is declared within a destructor.
1583 mangleCXXDtorType(Dtor_Complete);
1584 writeAbiTags(ND, AdditionalAbiTags);
11
Passing null pointer value via 1st parameter 'ND'
12
Calling 'CXXNameMangler::writeAbiTags'
1585 break;
1586
1587 case DeclarationName::CXXOperatorName:
1588 if (ND && Arity == UnknownArity) {
1589 Arity = cast<FunctionDecl>(ND)->getNumParams();
1590
1591 // If we have a member function, we need to include the 'this' pointer.
1592 if (const auto *MD = dyn_cast<CXXMethodDecl>(ND))
1593 if (!MD->isStatic())
1594 Arity++;
1595 }
1596 LLVM_FALLTHROUGH[[gnu::fallthrough]];
1597 case DeclarationName::CXXConversionFunctionName:
1598 case DeclarationName::CXXLiteralOperatorName:
1599 mangleOperatorName(Name, Arity);
1600 writeAbiTags(ND, AdditionalAbiTags);
1601 break;
1602
1603 case DeclarationName::CXXDeductionGuideName:
1604 llvm_unreachable("Can't mangle a deduction guide name!")::llvm::llvm_unreachable_internal("Can't mangle a deduction guide name!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1604)
;
1605
1606 case DeclarationName::CXXUsingDirective:
1607 llvm_unreachable("Can't mangle a using directive name!")::llvm::llvm_unreachable_internal("Can't mangle a using directive name!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1607)
;
1608 }
1609}
1610
1611void CXXNameMangler::mangleRegCallName(const IdentifierInfo *II) {
1612 // <source-name> ::= <positive length number> __regcall3__ <identifier>
1613 // <number> ::= [n] <non-negative decimal integer>
1614 // <identifier> ::= <unqualified source code identifier>
1615 Out << II->getLength() + sizeof("__regcall3__") - 1 << "__regcall3__"
1616 << II->getName();
1617}
1618
1619void CXXNameMangler::mangleDeviceStubName(const IdentifierInfo *II) {
1620 // <source-name> ::= <positive length number> __device_stub__ <identifier>
1621 // <number> ::= [n] <non-negative decimal integer>
1622 // <identifier> ::= <unqualified source code identifier>
1623 Out << II->getLength() + sizeof("__device_stub__") - 1 << "__device_stub__"
1624 << II->getName();
1625}
1626
1627void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) {
1628 // <source-name> ::= <positive length number> <identifier>
1629 // <number> ::= [n] <non-negative decimal integer>
1630 // <identifier> ::= <unqualified source code identifier>
1631 Out << II->getLength() << II->getName();
1632}
1633
1634void CXXNameMangler::mangleNestedName(GlobalDecl GD,
1635 const DeclContext *DC,
1636 const AbiTagList *AdditionalAbiTags,
1637 bool NoFunction) {
1638 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
1639 // <nested-name>
1640 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
1641 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
1642 // <template-args> E
1643
1644 Out << 'N';
1645 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) {
1646 Qualifiers MethodQuals = Method->getMethodQualifiers();
1647 // We do not consider restrict a distinguishing attribute for overloading
1648 // purposes so we must not mangle it.
1649 MethodQuals.removeRestrict();
1650 mangleQualifiers(MethodQuals);
1651 mangleRefQualifier(Method->getRefQualifier());
1652 }
1653
1654 // Check if we have a template.
1655 const TemplateArgumentList *TemplateArgs = nullptr;
1656 if (GlobalDecl TD = isTemplate(GD, TemplateArgs)) {
1657 mangleTemplatePrefix(TD, NoFunction);
1658 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
1659 }
1660 else {
1661 manglePrefix(DC, NoFunction);
1662 mangleUnqualifiedName(GD, AdditionalAbiTags);
1663 }
1664
1665 Out << 'E';
1666}
1667void CXXNameMangler::mangleNestedName(const TemplateDecl *TD,
1668 const TemplateArgument *TemplateArgs,
1669 unsigned NumTemplateArgs) {
1670 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
1671
1672 Out << 'N';
1673
1674 mangleTemplatePrefix(TD);
1675 mangleTemplateArgs(asTemplateName(TD), TemplateArgs, NumTemplateArgs);
1676
1677 Out << 'E';
1678}
1679
1680static GlobalDecl getParentOfLocalEntity(const DeclContext *DC) {
1681 GlobalDecl GD;
1682 // The Itanium spec says:
1683 // For entities in constructors and destructors, the mangling of the
1684 // complete object constructor or destructor is used as the base function
1685 // name, i.e. the C1 or D1 version.
1686 if (auto *CD = dyn_cast<CXXConstructorDecl>(DC))
1687 GD = GlobalDecl(CD, Ctor_Complete);
1688 else if (auto *DD = dyn_cast<CXXDestructorDecl>(DC))
1689 GD = GlobalDecl(DD, Dtor_Complete);
1690 else
1691 GD = GlobalDecl(cast<FunctionDecl>(DC));
1692 return GD;
1693}
1694
1695void CXXNameMangler::mangleLocalName(GlobalDecl GD,
1696 const AbiTagList *AdditionalAbiTags) {
1697 const Decl *D = GD.getDecl();
1698 // <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1699 // := Z <function encoding> E s [<discriminator>]
1700 // <local-name> := Z <function encoding> E d [ <parameter number> ]
1701 // _ <entity name>
1702 // <discriminator> := _ <non-negative number>
1703 assert(isa<NamedDecl>(D) || isa<BlockDecl>(D))((isa<NamedDecl>(D) || isa<BlockDecl>(D)) ? static_cast
<void> (0) : __assert_fail ("isa<NamedDecl>(D) || isa<BlockDecl>(D)"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1703, __PRETTY_FUNCTION__))
;
1704 const RecordDecl *RD = GetLocalClassDecl(D);
1705 const DeclContext *DC = getEffectiveDeclContext(RD ? RD : D);
1706
1707 Out << 'Z';
1708
1709 {
1710 AbiTagState LocalAbiTags(AbiTags);
1711
1712 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC))
1713 mangleObjCMethodName(MD);
1714 else if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC))
1715 mangleBlockForPrefix(BD);
1716 else
1717 mangleFunctionEncoding(getParentOfLocalEntity(DC));
1718
1719 // Implicit ABI tags (from namespace) are not available in the following
1720 // entity; reset to actually emitted tags, which are available.
1721 LocalAbiTags.setUsedAbiTags(LocalAbiTags.getEmittedAbiTags());
1722 }
1723
1724 Out << 'E';
1725
1726 // GCC 5.3.0 doesn't emit derived ABI tags for local names but that seems to
1727 // be a bug that is fixed in trunk.
1728
1729 if (RD) {
1730 // The parameter number is omitted for the last parameter, 0 for the
1731 // second-to-last parameter, 1 for the third-to-last parameter, etc. The
1732 // <entity name> will of course contain a <closure-type-name>: Its
1733 // numbering will be local to the particular argument in which it appears
1734 // -- other default arguments do not affect its encoding.
1735 const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD);
1736 if (CXXRD && CXXRD->isLambda()) {
1737 if (const ParmVarDecl *Parm
1738 = dyn_cast_or_null<ParmVarDecl>(CXXRD->getLambdaContextDecl())) {
1739 if (const FunctionDecl *Func
1740 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1741 Out << 'd';
1742 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1743 if (Num > 1)
1744 mangleNumber(Num - 2);
1745 Out << '_';
1746 }
1747 }
1748 }
1749
1750 // Mangle the name relative to the closest enclosing function.
1751 // equality ok because RD derived from ND above
1752 if (D == RD) {
1753 mangleUnqualifiedName(RD, AdditionalAbiTags);
1754 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1755 manglePrefix(getEffectiveDeclContext(BD), true /*NoFunction*/);
1756 assert(!AdditionalAbiTags && "Block cannot have additional abi tags")((!AdditionalAbiTags && "Block cannot have additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"Block cannot have additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1756, __PRETTY_FUNCTION__))
;
1757 mangleUnqualifiedBlock(BD);
1758 } else {
1759 const NamedDecl *ND = cast<NamedDecl>(D);
1760 mangleNestedName(GD, getEffectiveDeclContext(ND), AdditionalAbiTags,
1761 true /*NoFunction*/);
1762 }
1763 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1764 // Mangle a block in a default parameter; see above explanation for
1765 // lambdas.
1766 if (const ParmVarDecl *Parm
1767 = dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl())) {
1768 if (const FunctionDecl *Func
1769 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1770 Out << 'd';
1771 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1772 if (Num > 1)
1773 mangleNumber(Num - 2);
1774 Out << '_';
1775 }
1776 }
1777
1778 assert(!AdditionalAbiTags && "Block cannot have additional abi tags")((!AdditionalAbiTags && "Block cannot have additional abi tags"
) ? static_cast<void> (0) : __assert_fail ("!AdditionalAbiTags && \"Block cannot have additional abi tags\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1778, __PRETTY_FUNCTION__))
;
1779 mangleUnqualifiedBlock(BD);
1780 } else {
1781 mangleUnqualifiedName(GD, AdditionalAbiTags);
1782 }
1783
1784 if (const NamedDecl *ND = dyn_cast<NamedDecl>(RD ? RD : D)) {
1785 unsigned disc;
1786 if (Context.getNextDiscriminator(ND, disc)) {
1787 if (disc < 10)
1788 Out << '_' << disc;
1789 else
1790 Out << "__" << disc << '_';
1791 }
1792 }
1793}
1794
1795void CXXNameMangler::mangleBlockForPrefix(const BlockDecl *Block) {
1796 if (GetLocalClassDecl(Block)) {
1797 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1798 return;
1799 }
1800 const DeclContext *DC = getEffectiveDeclContext(Block);
1801 if (isLocalContainerContext(DC)) {
1802 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1803 return;
1804 }
1805 manglePrefix(getEffectiveDeclContext(Block));
1806 mangleUnqualifiedBlock(Block);
1807}
1808
1809void CXXNameMangler::mangleUnqualifiedBlock(const BlockDecl *Block) {
1810 if (Decl *Context = Block->getBlockManglingContextDecl()) {
1811 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1812 Context->getDeclContext()->isRecord()) {
1813 const auto *ND = cast<NamedDecl>(Context);
1814 if (ND->getIdentifier()) {
1815 mangleSourceNameWithAbiTags(ND);
1816 Out << 'M';
1817 }
1818 }
1819 }
1820
1821 // If we have a block mangling number, use it.
1822 unsigned Number = Block->getBlockManglingNumber();
1823 // Otherwise, just make up a number. It doesn't matter what it is because
1824 // the symbol in question isn't externally visible.
1825 if (!Number)
1826 Number = Context.getBlockId(Block, false);
1827 else {
1828 // Stored mangling numbers are 1-based.
1829 --Number;
1830 }
1831 Out << "Ub";
1832 if (Number > 0)
1833 Out << Number - 1;
1834 Out << '_';
1835}
1836
1837// <template-param-decl>
1838// ::= Ty # template type parameter
1839// ::= Tn <type> # template non-type parameter
1840// ::= Tt <template-param-decl>* E # template template parameter
1841// ::= Tp <template-param-decl> # template parameter pack
1842void CXXNameMangler::mangleTemplateParamDecl(const NamedDecl *Decl) {
1843 if (auto *Ty = dyn_cast<TemplateTypeParmDecl>(Decl)) {
1844 if (Ty->isParameterPack())
1845 Out << "Tp";
1846 Out << "Ty";
1847 } else if (auto *Tn = dyn_cast<NonTypeTemplateParmDecl>(Decl)) {
1848 if (Tn->isExpandedParameterPack()) {
1849 for (unsigned I = 0, N = Tn->getNumExpansionTypes(); I != N; ++I) {
1850 Out << "Tn";
1851 mangleType(Tn->getExpansionType(I));
1852 }
1853 } else {
1854 QualType T = Tn->getType();
1855 if (Tn->isParameterPack()) {
1856 Out << "Tp";
1857 if (auto *PackExpansion = T->getAs<PackExpansionType>())
1858 T = PackExpansion->getPattern();
1859 }
1860 Out << "Tn";
1861 mangleType(T);
1862 }
1863 } else if (auto *Tt = dyn_cast<TemplateTemplateParmDecl>(Decl)) {
1864 if (Tt->isExpandedParameterPack()) {
1865 for (unsigned I = 0, N = Tt->getNumExpansionTemplateParameters(); I != N;
1866 ++I) {
1867 Out << "Tt";
1868 for (auto *Param : *Tt->getExpansionTemplateParameters(I))
1869 mangleTemplateParamDecl(Param);
1870 Out << "E";
1871 }
1872 } else {
1873 if (Tt->isParameterPack())
1874 Out << "Tp";
1875 Out << "Tt";
1876 for (auto *Param : *Tt->getTemplateParameters())
1877 mangleTemplateParamDecl(Param);
1878 Out << "E";
1879 }
1880 }
1881}
1882
1883void CXXNameMangler::mangleLambda(const CXXRecordDecl *Lambda) {
1884 // If the context of a closure type is an initializer for a class member
1885 // (static or nonstatic), it is encoded in a qualified name with a final
1886 // <prefix> of the form:
1887 //
1888 // <data-member-prefix> := <member source-name> M
1889 //
1890 // Technically, the data-member-prefix is part of the <prefix>. However,
1891 // since a closure type will always be mangled with a prefix, it's easier
1892 // to emit that last part of the prefix here.
1893 if (Decl *Context = Lambda->getLambdaContextDecl()) {
1894 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1895 !isa<ParmVarDecl>(Context)) {
1896 // FIXME: 'inline auto [a, b] = []{ return ... };' does not get a
1897 // reasonable mangling here.
1898 if (const IdentifierInfo *Name
1899 = cast<NamedDecl>(Context)->getIdentifier()) {
1900 mangleSourceName(Name);
1901 const TemplateArgumentList *TemplateArgs = nullptr;
1902 if (GlobalDecl TD = isTemplate(cast<NamedDecl>(Context), TemplateArgs))
1903 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
1904 Out << 'M';
1905 }
1906 }
1907 }
1908
1909 Out << "Ul";
1910 mangleLambdaSig(Lambda);
1911 Out << "E";
1912
1913 // The number is omitted for the first closure type with a given
1914 // <lambda-sig> in a given context; it is n-2 for the nth closure type
1915 // (in lexical order) with that same <lambda-sig> and context.
1916 //
1917 // The AST keeps track of the number for us.
1918 //
1919 // In CUDA/HIP, to ensure the consistent lamba numbering between the device-
1920 // and host-side compilations, an extra device mangle context may be created
1921 // if the host-side CXX ABI has different numbering for lambda. In such case,
1922 // if the mangle context is that device-side one, use the device-side lambda
1923 // mangling number for this lambda.
1924 unsigned Number = Context.isDeviceMangleContext()
1925 ? Lambda->getDeviceLambdaManglingNumber()
1926 : Lambda->getLambdaManglingNumber();
1927 assert(Number > 0 && "Lambda should be mangled as an unnamed class")((Number > 0 && "Lambda should be mangled as an unnamed class"
) ? static_cast<void> (0) : __assert_fail ("Number > 0 && \"Lambda should be mangled as an unnamed class\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1927, __PRETTY_FUNCTION__))
;
1928 if (Number > 1)
1929 mangleNumber(Number - 2);
1930 Out << '_';
1931}
1932
1933void CXXNameMangler::mangleLambdaSig(const CXXRecordDecl *Lambda) {
1934 for (auto *D : Lambda->getLambdaExplicitTemplateParameters())
1935 mangleTemplateParamDecl(D);
1936 auto *Proto =
1937 Lambda->getLambdaTypeInfo()->getType()->castAs<FunctionProtoType>();
1938 mangleBareFunctionType(Proto, /*MangleReturnType=*/false,
1939 Lambda->getLambdaStaticInvoker());
1940}
1941
1942void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) {
1943 switch (qualifier->getKind()) {
1944 case NestedNameSpecifier::Global:
1945 // nothing
1946 return;
1947
1948 case NestedNameSpecifier::Super:
1949 llvm_unreachable("Can't mangle __super specifier")::llvm::llvm_unreachable_internal("Can't mangle __super specifier"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1949)
;
1950
1951 case NestedNameSpecifier::Namespace:
1952 mangleName(qualifier->getAsNamespace());
1953 return;
1954
1955 case NestedNameSpecifier::NamespaceAlias:
1956 mangleName(qualifier->getAsNamespaceAlias()->getNamespace());
1957 return;
1958
1959 case NestedNameSpecifier::TypeSpec:
1960 case NestedNameSpecifier::TypeSpecWithTemplate:
1961 manglePrefix(QualType(qualifier->getAsType(), 0));
1962 return;
1963
1964 case NestedNameSpecifier::Identifier:
1965 // Member expressions can have these without prefixes, but that
1966 // should end up in mangleUnresolvedPrefix instead.
1967 assert(qualifier->getPrefix())((qualifier->getPrefix()) ? static_cast<void> (0) : __assert_fail
("qualifier->getPrefix()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1967, __PRETTY_FUNCTION__))
;
1968 manglePrefix(qualifier->getPrefix());
1969
1970 mangleSourceName(qualifier->getAsIdentifier());
1971 return;
1972 }
1973
1974 llvm_unreachable("unexpected nested name specifier")::llvm::llvm_unreachable_internal("unexpected nested name specifier"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1974)
;
1975}
1976
1977void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) {
1978 // <prefix> ::= <prefix> <unqualified-name>
1979 // ::= <template-prefix> <template-args>
1980 // ::= <template-param>
1981 // ::= # empty
1982 // ::= <substitution>
1983
1984 DC = IgnoreLinkageSpecDecls(DC);
1985
1986 if (DC->isTranslationUnit())
1987 return;
1988
1989 if (NoFunction && isLocalContainerContext(DC))
1990 return;
1991
1992 assert(!isLocalContainerContext(DC))((!isLocalContainerContext(DC)) ? static_cast<void> (0)
: __assert_fail ("!isLocalContainerContext(DC)", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 1992, __PRETTY_FUNCTION__))
;
1993
1994 const NamedDecl *ND = cast<NamedDecl>(DC);
1995 if (mangleSubstitution(ND))
1996 return;
1997
1998 // Check if we have a template.
1999 const TemplateArgumentList *TemplateArgs = nullptr;
2000 if (GlobalDecl TD = isTemplate(ND, TemplateArgs)) {
2001 mangleTemplatePrefix(TD);
2002 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
2003 } else {
2004 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
2005 mangleUnqualifiedName(ND, nullptr);
2006 }
2007
2008 addSubstitution(ND);
2009}
2010
2011void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) {
2012 // <template-prefix> ::= <prefix> <template unqualified-name>
2013 // ::= <template-param>
2014 // ::= <substitution>
2015 if (TemplateDecl *TD = Template.getAsTemplateDecl())
2016 return mangleTemplatePrefix(TD);
2017
2018 DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
2019 assert(Dependent && "unexpected template name kind")((Dependent && "unexpected template name kind") ? static_cast
<void> (0) : __assert_fail ("Dependent && \"unexpected template name kind\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2019, __PRETTY_FUNCTION__))
;
2020
2021 // Clang 11 and before mangled the substitution for a dependent template name
2022 // after already having emitted (a substitution for) the prefix.
2023 bool Clang11Compat = getASTContext().getLangOpts().getClangABICompat() <=
2024 LangOptions::ClangABI::Ver11;
2025 if (!Clang11Compat && mangleSubstitution(Template))
2026 return;
2027
2028 if (NestedNameSpecifier *Qualifier = Dependent->getQualifier())
2029 manglePrefix(Qualifier);
2030
2031 if (Clang11Compat && mangleSubstitution(Template))
2032 return;
2033
2034 if (const IdentifierInfo *Id = Dependent->getIdentifier())
2035 mangleSourceName(Id);
2036 else
2037 mangleOperatorName(Dependent->getOperator(), UnknownArity);
2038
2039 addSubstitution(Template);
2040}
2041
2042void CXXNameMangler::mangleTemplatePrefix(GlobalDecl GD,
2043 bool NoFunction) {
2044 const TemplateDecl *ND = cast<TemplateDecl>(GD.getDecl());
2045 // <template-prefix> ::= <prefix> <template unqualified-name>
2046 // ::= <template-param>
2047 // ::= <substitution>
2048 // <template-template-param> ::= <template-param>
2049 // <substitution>
2050
2051 if (mangleSubstitution(ND))
2052 return;
2053
2054 // <template-template-param> ::= <template-param>
2055 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
2056 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
2057 } else {
2058 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
2059 if (isa<BuiltinTemplateDecl>(ND) || isa<ConceptDecl>(ND))
2060 mangleUnqualifiedName(GD, nullptr);
2061 else
2062 mangleUnqualifiedName(GD.getWithDecl(ND->getTemplatedDecl()), nullptr);
2063 }
2064
2065 addSubstitution(ND);
2066}
2067
2068/// Mangles a template name under the production <type>. Required for
2069/// template template arguments.
2070/// <type> ::= <class-enum-type>
2071/// ::= <template-param>
2072/// ::= <substitution>
2073void CXXNameMangler::mangleType(TemplateName TN) {
2074 if (mangleSubstitution(TN))
2075 return;
2076
2077 TemplateDecl *TD = nullptr;
2078
2079 switch (TN.getKind()) {
2080 case TemplateName::QualifiedTemplate:
2081 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl();
2082 goto HaveDecl;
2083
2084 case TemplateName::Template:
2085 TD = TN.getAsTemplateDecl();
2086 goto HaveDecl;
2087
2088 HaveDecl:
2089 if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(TD))
2090 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
2091 else
2092 mangleName(TD);
2093 break;
2094
2095 case TemplateName::OverloadedTemplate:
2096 case TemplateName::AssumedTemplate:
2097 llvm_unreachable("can't mangle an overloaded template name as a <type>")::llvm::llvm_unreachable_internal("can't mangle an overloaded template name as a <type>"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2097)
;
2098
2099 case TemplateName::DependentTemplate: {
2100 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName();
2101 assert(Dependent->isIdentifier())((Dependent->isIdentifier()) ? static_cast<void> (0)
: __assert_fail ("Dependent->isIdentifier()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2101, __PRETTY_FUNCTION__))
;
2102
2103 // <class-enum-type> ::= <name>
2104 // <name> ::= <nested-name>
2105 mangleUnresolvedPrefix(Dependent->getQualifier());
2106 mangleSourceName(Dependent->getIdentifier());
2107 break;
2108 }
2109
2110 case TemplateName::SubstTemplateTemplateParm: {
2111 // Substituted template parameters are mangled as the substituted
2112 // template. This will check for the substitution twice, which is
2113 // fine, but we have to return early so that we don't try to *add*
2114 // the substitution twice.
2115 SubstTemplateTemplateParmStorage *subst
2116 = TN.getAsSubstTemplateTemplateParm();
2117 mangleType(subst->getReplacement());
2118 return;
2119 }
2120
2121 case TemplateName::SubstTemplateTemplateParmPack: {
2122 // FIXME: not clear how to mangle this!
2123 // template <template <class> class T...> class A {
2124 // template <template <class> class U...> void foo(B<T,U> x...);
2125 // };
2126 Out << "_SUBSTPACK_";
2127 break;
2128 }
2129 }
2130
2131 addSubstitution(TN);
2132}
2133
2134bool CXXNameMangler::mangleUnresolvedTypeOrSimpleId(QualType Ty,
2135 StringRef Prefix) {
2136 // Only certain other types are valid as prefixes; enumerate them.
2137 switch (Ty->getTypeClass()) {
2138 case Type::Builtin:
2139 case Type::Complex:
2140 case Type::Adjusted:
2141 case Type::Decayed:
2142 case Type::Pointer:
2143 case Type::BlockPointer:
2144 case Type::LValueReference:
2145 case Type::RValueReference:
2146 case Type::MemberPointer:
2147 case Type::ConstantArray:
2148 case Type::IncompleteArray:
2149 case Type::VariableArray:
2150 case Type::DependentSizedArray:
2151 case Type::DependentAddressSpace:
2152 case Type::DependentVector:
2153 case Type::DependentSizedExtVector:
2154 case Type::Vector:
2155 case Type::ExtVector:
2156 case Type::ConstantMatrix:
2157 case Type::DependentSizedMatrix:
2158 case Type::FunctionProto:
2159 case Type::FunctionNoProto:
2160 case Type::Paren:
2161 case Type::Attributed:
2162 case Type::Auto:
2163 case Type::DeducedTemplateSpecialization:
2164 case Type::PackExpansion:
2165 case Type::ObjCObject:
2166 case Type::ObjCInterface:
2167 case Type::ObjCObjectPointer:
2168 case Type::ObjCTypeParam:
2169 case Type::Atomic:
2170 case Type::Pipe:
2171 case Type::MacroQualified:
2172 case Type::ExtInt:
2173 case Type::DependentExtInt:
2174 llvm_unreachable("type is illegal as a nested name specifier")::llvm::llvm_unreachable_internal("type is illegal as a nested name specifier"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2174)
;
2175
2176 case Type::SubstTemplateTypeParmPack:
2177 // FIXME: not clear how to mangle this!
2178 // template <class T...> class A {
2179 // template <class U...> void foo(decltype(T::foo(U())) x...);
2180 // };
2181 Out << "_SUBSTPACK_";
2182 break;
2183
2184 // <unresolved-type> ::= <template-param>
2185 // ::= <decltype>
2186 // ::= <template-template-param> <template-args>
2187 // (this last is not official yet)
2188 case Type::TypeOfExpr:
2189 case Type::TypeOf:
2190 case Type::Decltype:
2191 case Type::TemplateTypeParm:
2192 case Type::UnaryTransform:
2193 case Type::SubstTemplateTypeParm:
2194 unresolvedType:
2195 // Some callers want a prefix before the mangled type.
2196 Out << Prefix;
2197
2198 // This seems to do everything we want. It's not really
2199 // sanctioned for a substituted template parameter, though.
2200 mangleType(Ty);
2201
2202 // We never want to print 'E' directly after an unresolved-type,
2203 // so we return directly.
2204 return true;
2205
2206 case Type::Typedef:
2207 mangleSourceNameWithAbiTags(cast<TypedefType>(Ty)->getDecl());
2208 break;
2209
2210 case Type::UnresolvedUsing:
2211 mangleSourceNameWithAbiTags(
2212 cast<UnresolvedUsingType>(Ty)->getDecl());
2213 break;
2214
2215 case Type::Enum:
2216 case Type::Record:
2217 mangleSourceNameWithAbiTags(cast<TagType>(Ty)->getDecl());
2218 break;
2219
2220 case Type::TemplateSpecialization: {
2221 const TemplateSpecializationType *TST =
2222 cast<TemplateSpecializationType>(Ty);
2223 TemplateName TN = TST->getTemplateName();
2224 switch (TN.getKind()) {
2225 case TemplateName::Template:
2226 case TemplateName::QualifiedTemplate: {
2227 TemplateDecl *TD = TN.getAsTemplateDecl();
2228
2229 // If the base is a template template parameter, this is an
2230 // unresolved type.
2231 assert(TD && "no template for template specialization type")((TD && "no template for template specialization type"
) ? static_cast<void> (0) : __assert_fail ("TD && \"no template for template specialization type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2231, __PRETTY_FUNCTION__))
;
2232 if (isa<TemplateTemplateParmDecl>(TD))
2233 goto unresolvedType;
2234
2235 mangleSourceNameWithAbiTags(TD);
2236 break;
2237 }
2238
2239 case TemplateName::OverloadedTemplate:
2240 case TemplateName::AssumedTemplate:
2241 case TemplateName::DependentTemplate:
2242 llvm_unreachable("invalid base for a template specialization type")::llvm::llvm_unreachable_internal("invalid base for a template specialization type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2242)
;
2243
2244 case TemplateName::SubstTemplateTemplateParm: {
2245 SubstTemplateTemplateParmStorage *subst =
2246 TN.getAsSubstTemplateTemplateParm();
2247 mangleExistingSubstitution(subst->getReplacement());
2248 break;
2249 }
2250
2251 case TemplateName::SubstTemplateTemplateParmPack: {
2252 // FIXME: not clear how to mangle this!
2253 // template <template <class U> class T...> class A {
2254 // template <class U...> void foo(decltype(T<U>::foo) x...);
2255 // };
2256 Out << "_SUBSTPACK_";
2257 break;
2258 }
2259 }
2260
2261 // Note: we don't pass in the template name here. We are mangling the
2262 // original source-level template arguments, so we shouldn't consider
2263 // conversions to the corresponding template parameter.
2264 // FIXME: Other compilers mangle partially-resolved template arguments in
2265 // unresolved-qualifier-levels.
2266 mangleTemplateArgs(TemplateName(), TST->getArgs(), TST->getNumArgs());
2267 break;
2268 }
2269
2270 case Type::InjectedClassName:
2271 mangleSourceNameWithAbiTags(
2272 cast<InjectedClassNameType>(Ty)->getDecl());
2273 break;
2274
2275 case Type::DependentName:
2276 mangleSourceName(cast<DependentNameType>(Ty)->getIdentifier());
2277 break;
2278
2279 case Type::DependentTemplateSpecialization: {
2280 const DependentTemplateSpecializationType *DTST =
2281 cast<DependentTemplateSpecializationType>(Ty);
2282 TemplateName Template = getASTContext().getDependentTemplateName(
2283 DTST->getQualifier(), DTST->getIdentifier());
2284 mangleSourceName(DTST->getIdentifier());
2285 mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs());
2286 break;
2287 }
2288
2289 case Type::Elaborated:
2290 return mangleUnresolvedTypeOrSimpleId(
2291 cast<ElaboratedType>(Ty)->getNamedType(), Prefix);
2292 }
2293
2294 return false;
2295}
2296
2297void CXXNameMangler::mangleOperatorName(DeclarationName Name, unsigned Arity) {
2298 switch (Name.getNameKind()) {
2299 case DeclarationName::CXXConstructorName:
2300 case DeclarationName::CXXDestructorName:
2301 case DeclarationName::CXXDeductionGuideName:
2302 case DeclarationName::CXXUsingDirective:
2303 case DeclarationName::Identifier:
2304 case DeclarationName::ObjCMultiArgSelector:
2305 case DeclarationName::ObjCOneArgSelector:
2306 case DeclarationName::ObjCZeroArgSelector:
2307 llvm_unreachable("Not an operator name")::llvm::llvm_unreachable_internal("Not an operator name", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2307)
;
2308
2309 case DeclarationName::CXXConversionFunctionName:
2310 // <operator-name> ::= cv <type> # (cast)
2311 Out << "cv";
2312 mangleType(Name.getCXXNameType());
2313 break;
2314
2315 case DeclarationName::CXXLiteralOperatorName:
2316 Out << "li";
2317 mangleSourceName(Name.getCXXLiteralIdentifier());
2318 return;
2319
2320 case DeclarationName::CXXOperatorName:
2321 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity);
2322 break;
2323 }
2324}
2325
2326void
2327CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) {
2328 switch (OO) {
2329 // <operator-name> ::= nw # new
2330 case OO_New: Out << "nw"; break;
2331 // ::= na # new[]
2332 case OO_Array_New: Out << "na"; break;
2333 // ::= dl # delete
2334 case OO_Delete: Out << "dl"; break;
2335 // ::= da # delete[]
2336 case OO_Array_Delete: Out << "da"; break;
2337 // ::= ps # + (unary)
2338 // ::= pl # + (binary or unknown)
2339 case OO_Plus:
2340 Out << (Arity == 1? "ps" : "pl"); break;
2341 // ::= ng # - (unary)
2342 // ::= mi # - (binary or unknown)
2343 case OO_Minus:
2344 Out << (Arity == 1? "ng" : "mi"); break;
2345 // ::= ad # & (unary)
2346 // ::= an # & (binary or unknown)
2347 case OO_Amp:
2348 Out << (Arity == 1? "ad" : "an"); break;
2349 // ::= de # * (unary)
2350 // ::= ml # * (binary or unknown)
2351 case OO_Star:
2352 // Use binary when unknown.
2353 Out << (Arity == 1? "de" : "ml"); break;
2354 // ::= co # ~
2355 case OO_Tilde: Out << "co"; break;
2356 // ::= dv # /
2357 case OO_Slash: Out << "dv"; break;
2358 // ::= rm # %
2359 case OO_Percent: Out << "rm"; break;
2360 // ::= or # |
2361 case OO_Pipe: Out << "or"; break;
2362 // ::= eo # ^
2363 case OO_Caret: Out << "eo"; break;
2364 // ::= aS # =
2365 case OO_Equal: Out << "aS"; break;
2366 // ::= pL # +=
2367 case OO_PlusEqual: Out << "pL"; break;
2368 // ::= mI # -=
2369 case OO_MinusEqual: Out << "mI"; break;
2370 // ::= mL # *=
2371 case OO_StarEqual: Out << "mL"; break;
2372 // ::= dV # /=
2373 case OO_SlashEqual: Out << "dV"; break;
2374 // ::= rM # %=
2375 case OO_PercentEqual: Out << "rM"; break;
2376 // ::= aN # &=
2377 case OO_AmpEqual: Out << "aN"; break;
2378 // ::= oR # |=
2379 case OO_PipeEqual: Out << "oR"; break;
2380 // ::= eO # ^=
2381 case OO_CaretEqual: Out << "eO"; break;
2382 // ::= ls # <<
2383 case OO_LessLess: Out << "ls"; break;
2384 // ::= rs # >>
2385 case OO_GreaterGreater: Out << "rs"; break;
2386 // ::= lS # <<=
2387 case OO_LessLessEqual: Out << "lS"; break;
2388 // ::= rS # >>=
2389 case OO_GreaterGreaterEqual: Out << "rS"; break;
2390 // ::= eq # ==
2391 case OO_EqualEqual: Out << "eq"; break;
2392 // ::= ne # !=
2393 case OO_ExclaimEqual: Out << "ne"; break;
2394 // ::= lt # <
2395 case OO_Less: Out << "lt"; break;
2396 // ::= gt # >
2397 case OO_Greater: Out << "gt"; break;
2398 // ::= le # <=
2399 case OO_LessEqual: Out << "le"; break;
2400 // ::= ge # >=
2401 case OO_GreaterEqual: Out << "ge"; break;
2402 // ::= nt # !
2403 case OO_Exclaim: Out << "nt"; break;
2404 // ::= aa # &&
2405 case OO_AmpAmp: Out << "aa"; break;
2406 // ::= oo # ||
2407 case OO_PipePipe: Out << "oo"; break;
2408 // ::= pp # ++
2409 case OO_PlusPlus: Out << "pp"; break;
2410 // ::= mm # --
2411 case OO_MinusMinus: Out << "mm"; break;
2412 // ::= cm # ,
2413 case OO_Comma: Out << "cm"; break;
2414 // ::= pm # ->*
2415 case OO_ArrowStar: Out << "pm"; break;
2416 // ::= pt # ->
2417 case OO_Arrow: Out << "pt"; break;
2418 // ::= cl # ()
2419 case OO_Call: Out << "cl"; break;
2420 // ::= ix # []
2421 case OO_Subscript: Out << "ix"; break;
2422
2423 // ::= qu # ?
2424 // The conditional operator can't be overloaded, but we still handle it when
2425 // mangling expressions.
2426 case OO_Conditional: Out << "qu"; break;
2427 // Proposal on cxx-abi-dev, 2015-10-21.
2428 // ::= aw # co_await
2429 case OO_Coawait: Out << "aw"; break;
2430 // Proposed in cxx-abi github issue 43.
2431 // ::= ss # <=>
2432 case OO_Spaceship: Out << "ss"; break;
2433
2434 case OO_None:
2435 case NUM_OVERLOADED_OPERATORS:
2436 llvm_unreachable("Not an overloaded operator")::llvm::llvm_unreachable_internal("Not an overloaded operator"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2436)
;
2437 }
2438}
2439
2440void CXXNameMangler::mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST) {
2441 // Vendor qualifiers come first and if they are order-insensitive they must
2442 // be emitted in reversed alphabetical order, see Itanium ABI 5.1.5.
2443
2444 // <type> ::= U <addrspace-expr>
2445 if (DAST) {
2446 Out << "U2ASI";
2447 mangleExpression(DAST->getAddrSpaceExpr());
2448 Out << "E";
2449 }
2450
2451 // Address space qualifiers start with an ordinary letter.
2452 if (Quals.hasAddressSpace()) {
2453 // Address space extension:
2454 //
2455 // <type> ::= U <target-addrspace>
2456 // <type> ::= U <OpenCL-addrspace>
2457 // <type> ::= U <CUDA-addrspace>
2458
2459 SmallString<64> ASString;
2460 LangAS AS = Quals.getAddressSpace();
2461
2462 if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
2463 // <target-addrspace> ::= "AS" <address-space-number>
2464 unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
2465 if (TargetAS != 0)
2466 ASString = "AS" + llvm::utostr(TargetAS);
2467 } else {
2468 switch (AS) {
2469 default: llvm_unreachable("Not a language specific address space")::llvm::llvm_unreachable_internal("Not a language specific address space"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2469)
;
2470 // <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
2471 // "private"| "generic" | "device" |
2472 // "host" ]
2473 case LangAS::opencl_global:
2474 ASString = "CLglobal";
2475 break;
2476 case LangAS::opencl_global_device:
2477 ASString = "CLdevice";
2478 break;
2479 case LangAS::opencl_global_host:
2480 ASString = "CLhost";
2481 break;
2482 case LangAS::opencl_local:
2483 ASString = "CLlocal";
2484 break;
2485 case LangAS::opencl_constant:
2486 ASString = "CLconstant";
2487 break;
2488 case LangAS::opencl_private:
2489 ASString = "CLprivate";
2490 break;
2491 case LangAS::opencl_generic:
2492 ASString = "CLgeneric";
2493 break;
2494 // <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
2495 case LangAS::cuda_device:
2496 ASString = "CUdevice";
2497 break;
2498 case LangAS::cuda_constant:
2499 ASString = "CUconstant";
2500 break;
2501 case LangAS::cuda_shared:
2502 ASString = "CUshared";
2503 break;
2504 // <ptrsize-addrspace> ::= [ "ptr32_sptr" | "ptr32_uptr" | "ptr64" ]
2505 case LangAS::ptr32_sptr:
2506 ASString = "ptr32_sptr";
2507 break;
2508 case LangAS::ptr32_uptr:
2509 ASString = "ptr32_uptr";
2510 break;
2511 case LangAS::ptr64:
2512 ASString = "ptr64";
2513 break;
2514 }
2515 }
2516 if (!ASString.empty())
2517 mangleVendorQualifier(ASString);
2518 }
2519
2520 // The ARC ownership qualifiers start with underscores.
2521 // Objective-C ARC Extension:
2522 //
2523 // <type> ::= U "__strong"
2524 // <type> ::= U "__weak"
2525 // <type> ::= U "__autoreleasing"
2526 //
2527 // Note: we emit __weak first to preserve the order as
2528 // required by the Itanium ABI.
2529 if (Quals.getObjCLifetime() == Qualifiers::OCL_Weak)
2530 mangleVendorQualifier("__weak");
2531
2532 // __unaligned (from -fms-extensions)
2533 if (Quals.hasUnaligned())
2534 mangleVendorQualifier("__unaligned");
2535
2536 // Remaining ARC ownership qualifiers.
2537 switch (Quals.getObjCLifetime()) {
2538 case Qualifiers::OCL_None:
2539 break;
2540
2541 case Qualifiers::OCL_Weak:
2542 // Do nothing as we already handled this case above.
2543 break;
2544
2545 case Qualifiers::OCL_Strong:
2546 mangleVendorQualifier("__strong");
2547 break;
2548
2549 case Qualifiers::OCL_Autoreleasing:
2550 mangleVendorQualifier("__autoreleasing");
2551 break;
2552
2553 case Qualifiers::OCL_ExplicitNone:
2554 // The __unsafe_unretained qualifier is *not* mangled, so that
2555 // __unsafe_unretained types in ARC produce the same manglings as the
2556 // equivalent (but, naturally, unqualified) types in non-ARC, providing
2557 // better ABI compatibility.
2558 //
2559 // It's safe to do this because unqualified 'id' won't show up
2560 // in any type signatures that need to be mangled.
2561 break;
2562 }
2563
2564 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const
2565 if (Quals.hasRestrict())
2566 Out << 'r';
2567 if (Quals.hasVolatile())
2568 Out << 'V';
2569 if (Quals.hasConst())
2570 Out << 'K';
2571}
2572
2573void CXXNameMangler::mangleVendorQualifier(StringRef name) {
2574 Out << 'U' << name.size() << name;
2575}
2576
2577void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
2578 // <ref-qualifier> ::= R # lvalue reference
2579 // ::= O # rvalue-reference
2580 switch (RefQualifier) {
2581 case RQ_None:
2582 break;
2583
2584 case RQ_LValue:
2585 Out << 'R';
2586 break;
2587
2588 case RQ_RValue:
2589 Out << 'O';
2590 break;
2591 }
2592}
2593
2594void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
2595 Context.mangleObjCMethodNameAsSourceName(MD, Out);
2596}
2597
2598static bool isTypeSubstitutable(Qualifiers Quals, const Type *Ty,
2599 ASTContext &Ctx) {
2600 if (Quals)
2601 return true;
2602 if (Ty->isSpecificBuiltinType(BuiltinType::ObjCSel))
2603 return true;
2604 if (Ty->isOpenCLSpecificType())
2605 return true;
2606 if (Ty->isBuiltinType())
2607 return false;
2608 // Through to Clang 6.0, we accidentally treated undeduced auto types as
2609 // substitution candidates.
2610 if (Ctx.getLangOpts().getClangABICompat() > LangOptions::ClangABI::Ver6 &&
2611 isa<AutoType>(Ty))
2612 return false;
2613 // A placeholder type for class template deduction is substitutable with
2614 // its corresponding template name; this is handled specially when mangling
2615 // the type.
2616 if (auto *DeducedTST = Ty->getAs<DeducedTemplateSpecializationType>())
2617 if (DeducedTST->getDeducedType().isNull())
2618 return false;
2619 return true;
2620}
2621
2622void CXXNameMangler::mangleType(QualType T) {
2623 // If our type is instantiation-dependent but not dependent, we mangle
2624 // it as it was written in the source, removing any top-level sugar.
2625 // Otherwise, use the canonical type.
2626 //
2627 // FIXME: This is an approximation of the instantiation-dependent name
2628 // mangling rules, since we should really be using the type as written and
2629 // augmented via semantic analysis (i.e., with implicit conversions and
2630 // default template arguments) for any instantiation-dependent type.
2631 // Unfortunately, that requires several changes to our AST:
2632 // - Instantiation-dependent TemplateSpecializationTypes will need to be
2633 // uniqued, so that we can handle substitutions properly
2634 // - Default template arguments will need to be represented in the
2635 // TemplateSpecializationType, since they need to be mangled even though
2636 // they aren't written.
2637 // - Conversions on non-type template arguments need to be expressed, since
2638 // they can affect the mangling of sizeof/alignof.
2639 //
2640 // FIXME: This is wrong when mapping to the canonical type for a dependent
2641 // type discards instantiation-dependent portions of the type, such as for:
2642 //
2643 // template<typename T, int N> void f(T (&)[sizeof(N)]);
2644 // template<typename T> void f(T() throw(typename T::type)); (pre-C++17)
2645 //
2646 // It's also wrong in the opposite direction when instantiation-dependent,
2647 // canonically-equivalent types differ in some irrelevant portion of inner
2648 // type sugar. In such cases, we fail to form correct substitutions, eg:
2649 //
2650 // template<int N> void f(A<sizeof(N)> *, A<sizeof(N)> (*));
2651 //
2652 // We should instead canonicalize the non-instantiation-dependent parts,
2653 // regardless of whether the type as a whole is dependent or instantiation
2654 // dependent.
2655 if (!T->isInstantiationDependentType() || T->isDependentType())
2656 T = T.getCanonicalType();
2657 else {
2658 // Desugar any types that are purely sugar.
2659 do {
2660 // Don't desugar through template specialization types that aren't
2661 // type aliases. We need to mangle the template arguments as written.
2662 if (const TemplateSpecializationType *TST
2663 = dyn_cast<TemplateSpecializationType>(T))
2664 if (!TST->isTypeAlias())
2665 break;
2666
2667 // FIXME: We presumably shouldn't strip off ElaboratedTypes with
2668 // instantation-dependent qualifiers. See
2669 // https://github.com/itanium-cxx-abi/cxx-abi/issues/114.
2670
2671 QualType Desugared
2672 = T.getSingleStepDesugaredType(Context.getASTContext());
2673 if (Desugared == T)
2674 break;
2675
2676 T = Desugared;
2677 } while (true);
2678 }
2679 SplitQualType split = T.split();
2680 Qualifiers quals = split.Quals;
2681 const Type *ty = split.Ty;
2682
2683 bool isSubstitutable =
2684 isTypeSubstitutable(quals, ty, Context.getASTContext());
2685 if (isSubstitutable && mangleSubstitution(T))
2686 return;
2687
2688 // If we're mangling a qualified array type, push the qualifiers to
2689 // the element type.
2690 if (quals && isa<ArrayType>(T)) {
2691 ty = Context.getASTContext().getAsArrayType(T);
2692 quals = Qualifiers();
2693
2694 // Note that we don't update T: we want to add the
2695 // substitution at the original type.
2696 }
2697
2698 if (quals || ty->isDependentAddressSpaceType()) {
2699 if (const DependentAddressSpaceType *DAST =
2700 dyn_cast<DependentAddressSpaceType>(ty)) {
2701 SplitQualType splitDAST = DAST->getPointeeType().split();
2702 mangleQualifiers(splitDAST.Quals, DAST);
2703 mangleType(QualType(splitDAST.Ty, 0));
2704 } else {
2705 mangleQualifiers(quals);
2706
2707 // Recurse: even if the qualified type isn't yet substitutable,
2708 // the unqualified type might be.
2709 mangleType(QualType(ty, 0));
2710 }
2711 } else {
2712 switch (ty->getTypeClass()) {
2713#define ABSTRACT_TYPE(CLASS, PARENT)
2714#define NON_CANONICAL_TYPE(CLASS, PARENT) \
2715 case Type::CLASS: \
2716 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type")::llvm::llvm_unreachable_internal("can't mangle non-canonical type "
#CLASS "Type", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2716)
; \
2717 return;
2718#define TYPE(CLASS, PARENT) \
2719 case Type::CLASS: \
2720 mangleType(static_cast<const CLASS##Type*>(ty)); \
2721 break;
2722#include "clang/AST/TypeNodes.inc"
2723 }
2724 }
2725
2726 // Add the substitution.
2727 if (isSubstitutable)
2728 addSubstitution(T);
2729}
2730
2731void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) {
2732 if (!mangleStandardSubstitution(ND))
2733 mangleName(ND);
2734}
2735
2736void CXXNameMangler::mangleType(const BuiltinType *T) {
2737 // <type> ::= <builtin-type>
2738 // <builtin-type> ::= v # void
2739 // ::= w # wchar_t
2740 // ::= b # bool
2741 // ::= c # char
2742 // ::= a # signed char
2743 // ::= h # unsigned char
2744 // ::= s # short
2745 // ::= t # unsigned short
2746 // ::= i # int
2747 // ::= j # unsigned int
2748 // ::= l # long
2749 // ::= m # unsigned long
2750 // ::= x # long long, __int64
2751 // ::= y # unsigned long long, __int64
2752 // ::= n # __int128
2753 // ::= o # unsigned __int128
2754 // ::= f # float
2755 // ::= d # double
2756 // ::= e # long double, __float80
2757 // ::= g # __float128
2758 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits)
2759 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits)
2760 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits)
2761 // ::= Dh # IEEE 754r half-precision floating point (16 bits)
2762 // ::= DF <number> _ # ISO/IEC TS 18661 binary floating point type _FloatN (N bits);
2763 // ::= Di # char32_t
2764 // ::= Ds # char16_t
2765 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
2766 // ::= u <source-name> # vendor extended type
2767 std::string type_name;
2768 switch (T->getKind()) {
2769 case BuiltinType::Void:
2770 Out << 'v';
2771 break;
2772 case BuiltinType::Bool:
2773 Out << 'b';
2774 break;
2775 case BuiltinType::Char_U:
2776 case BuiltinType::Char_S:
2777 Out << 'c';
2778 break;
2779 case BuiltinType::UChar:
2780 Out << 'h';
2781 break;
2782 case BuiltinType::UShort:
2783 Out << 't';
2784 break;
2785 case BuiltinType::UInt:
2786 Out << 'j';
2787 break;
2788 case BuiltinType::ULong:
2789 Out << 'm';
2790 break;
2791 case BuiltinType::ULongLong:
2792 Out << 'y';
2793 break;
2794 case BuiltinType::UInt128:
2795 Out << 'o';
2796 break;
2797 case BuiltinType::SChar:
2798 Out << 'a';
2799 break;
2800 case BuiltinType::WChar_S:
2801 case BuiltinType::WChar_U:
2802 Out << 'w';
2803 break;
2804 case BuiltinType::Char8:
2805 Out << "Du";
2806 break;
2807 case BuiltinType::Char16:
2808 Out << "Ds";
2809 break;
2810 case BuiltinType::Char32:
2811 Out << "Di";
2812 break;
2813 case BuiltinType::Short:
2814 Out << 's';
2815 break;
2816 case BuiltinType::Int:
2817 Out << 'i';
2818 break;
2819 case BuiltinType::Long:
2820 Out << 'l';
2821 break;
2822 case BuiltinType::LongLong:
2823 Out << 'x';
2824 break;
2825 case BuiltinType::Int128:
2826 Out << 'n';
2827 break;
2828 case BuiltinType::Float16:
2829 Out << "DF16_";
2830 break;
2831 case BuiltinType::ShortAccum:
2832 case BuiltinType::Accum:
2833 case BuiltinType::LongAccum:
2834 case BuiltinType::UShortAccum:
2835 case BuiltinType::UAccum:
2836 case BuiltinType::ULongAccum:
2837 case BuiltinType::ShortFract:
2838 case BuiltinType::Fract:
2839 case BuiltinType::LongFract:
2840 case BuiltinType::UShortFract:
2841 case BuiltinType::UFract:
2842 case BuiltinType::ULongFract:
2843 case BuiltinType::SatShortAccum:
2844 case BuiltinType::SatAccum:
2845 case BuiltinType::SatLongAccum:
2846 case BuiltinType::SatUShortAccum:
2847 case BuiltinType::SatUAccum:
2848 case BuiltinType::SatULongAccum:
2849 case BuiltinType::SatShortFract:
2850 case BuiltinType::SatFract:
2851 case BuiltinType::SatLongFract:
2852 case BuiltinType::SatUShortFract:
2853 case BuiltinType::SatUFract:
2854 case BuiltinType::SatULongFract:
2855 llvm_unreachable("Fixed point types are disabled for c++")::llvm::llvm_unreachable_internal("Fixed point types are disabled for c++"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2855)
;
2856 case BuiltinType::Half:
2857 Out << "Dh";
2858 break;
2859 case BuiltinType::Float:
2860 Out << 'f';
2861 break;
2862 case BuiltinType::Double:
2863 Out << 'd';
2864 break;
2865 case BuiltinType::LongDouble: {
2866 const TargetInfo *TI = getASTContext().getLangOpts().OpenMP &&
2867 getASTContext().getLangOpts().OpenMPIsDevice
2868 ? getASTContext().getAuxTargetInfo()
2869 : &getASTContext().getTargetInfo();
2870 Out << TI->getLongDoubleMangling();
2871 break;
2872 }
2873 case BuiltinType::Float128: {
2874 const TargetInfo *TI = getASTContext().getLangOpts().OpenMP &&
2875 getASTContext().getLangOpts().OpenMPIsDevice
2876 ? getASTContext().getAuxTargetInfo()
2877 : &getASTContext().getTargetInfo();
2878 Out << TI->getFloat128Mangling();
2879 break;
2880 }
2881 case BuiltinType::BFloat16: {
2882 const TargetInfo *TI = &getASTContext().getTargetInfo();
2883 Out << TI->getBFloat16Mangling();
2884 break;
2885 }
2886 case BuiltinType::NullPtr:
2887 Out << "Dn";
2888 break;
2889
2890#define BUILTIN_TYPE(Id, SingletonId)
2891#define PLACEHOLDER_TYPE(Id, SingletonId) \
2892 case BuiltinType::Id:
2893#include "clang/AST/BuiltinTypes.def"
2894 case BuiltinType::Dependent:
2895 if (!NullOut)
2896 llvm_unreachable("mangling a placeholder type")::llvm::llvm_unreachable_internal("mangling a placeholder type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 2896)
;
2897 break;
2898 case BuiltinType::ObjCId:
2899 Out << "11objc_object";
2900 break;
2901 case BuiltinType::ObjCClass:
2902 Out << "10objc_class";
2903 break;
2904 case BuiltinType::ObjCSel:
2905 Out << "13objc_selector";
2906 break;
2907#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2908 case BuiltinType::Id: \
2909 type_name = "ocl_" #ImgType "_" #Suffix; \
2910 Out << type_name.size() << type_name; \
2911 break;
2912#include "clang/Basic/OpenCLImageTypes.def"
2913 case BuiltinType::OCLSampler:
2914 Out << "11ocl_sampler";
2915 break;
2916 case BuiltinType::OCLEvent:
2917 Out << "9ocl_event";
2918 break;
2919 case BuiltinType::OCLClkEvent:
2920 Out << "12ocl_clkevent";
2921 break;
2922 case BuiltinType::OCLQueue:
2923 Out << "9ocl_queue";
2924 break;
2925 case BuiltinType::OCLReserveID:
2926 Out << "13ocl_reserveid";
2927 break;
2928#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2929 case BuiltinType::Id: \
2930 type_name = "ocl_" #ExtType; \
2931 Out << type_name.size() << type_name; \
2932 break;
2933#include "clang/Basic/OpenCLExtensionTypes.def"
2934 // The SVE types are effectively target-specific. The mangling scheme
2935 // is defined in the appendices to the Procedure Call Standard for the
2936 // Arm Architecture.
2937#define SVE_VECTOR_TYPE(InternalName, MangledName, Id, SingletonId, NumEls, \
2938 ElBits, IsSigned, IsFP, IsBF) \
2939 case BuiltinType::Id: \
2940 type_name = MangledName; \
2941 Out << (type_name == InternalName ? "u" : "") << type_name.size() \
2942 << type_name; \
2943 break;
2944#define SVE_PREDICATE_TYPE(InternalName, MangledName, Id, SingletonId, NumEls) \
2945 case BuiltinType::Id: \
2946 type_name = MangledName; \
2947 Out << (type_name == InternalName ? "u" : "") << type_name.size() \
2948 << type_name; \
2949 break;
2950#include "clang/Basic/AArch64SVEACLETypes.def"
2951#define PPC_VECTOR_TYPE(Name, Id, Size) \
2952 case BuiltinType::Id: \
2953 type_name = #Name; \
2954 Out << 'u' << type_name.size() << type_name; \
2955 break;
2956#include "clang/Basic/PPCTypes.def"
2957 // TODO: Check the mangling scheme for RISC-V V.
2958#define RVV_TYPE(Name, Id, SingletonId) \
2959 case BuiltinType::Id: \
2960 type_name = Name; \
2961 Out << 'u' << type_name.size() << type_name; \
2962 break;
2963#include "clang/Basic/RISCVVTypes.def"
2964 }
2965}
2966
2967StringRef CXXNameMangler::getCallingConvQualifierName(CallingConv CC) {
2968 switch (CC) {
2969 case CC_C:
2970 return "";
2971
2972 case CC_X86VectorCall:
2973 case CC_X86Pascal:
2974 case CC_X86RegCall:
2975 case CC_AAPCS:
2976 case CC_AAPCS_VFP:
2977 case CC_AArch64VectorCall:
2978 case CC_IntelOclBicc:
2979 case CC_SpirFunction:
2980 case CC_OpenCLKernel:
2981 case CC_PreserveMost:
2982 case CC_PreserveAll:
2983 // FIXME: we should be mangling all of the above.
2984 return "";
2985
2986 case CC_X86ThisCall:
2987 // FIXME: To match mingw GCC, thiscall should only be mangled in when it is
2988 // used explicitly. At this point, we don't have that much information in
2989 // the AST, since clang tends to bake the convention into the canonical
2990 // function type. thiscall only rarely used explicitly, so don't mangle it
2991 // for now.
2992 return "";
2993
2994 case CC_X86StdCall:
2995 return "stdcall";
2996 case CC_X86FastCall:
2997 return "fastcall";
2998 case CC_X86_64SysV:
2999 return "sysv_abi";
3000 case CC_Win64:
3001 return "ms_abi";
3002 case CC_Swift:
3003 return "swiftcall";
3004 }
3005 llvm_unreachable("bad calling convention")::llvm::llvm_unreachable_internal("bad calling convention", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3005)
;
3006}
3007
3008void CXXNameMangler::mangleExtFunctionInfo(const FunctionType *T) {
3009 // Fast path.
3010 if (T->getExtInfo() == FunctionType::ExtInfo())
3011 return;
3012
3013 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
3014 // This will get more complicated in the future if we mangle other
3015 // things here; but for now, since we mangle ns_returns_retained as
3016 // a qualifier on the result type, we can get away with this:
3017 StringRef CCQualifier = getCallingConvQualifierName(T->getExtInfo().getCC());
3018 if (!CCQualifier.empty())
3019 mangleVendorQualifier(CCQualifier);
3020
3021 // FIXME: regparm
3022 // FIXME: noreturn
3023}
3024
3025void
3026CXXNameMangler::mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo PI) {
3027 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
3028
3029 // Note that these are *not* substitution candidates. Demanglers might
3030 // have trouble with this if the parameter type is fully substituted.
3031
3032 switch (PI.getABI()) {
3033 case ParameterABI::Ordinary:
3034 break;
3035
3036 // All of these start with "swift", so they come before "ns_consumed".
3037 case ParameterABI::SwiftContext:
3038 case ParameterABI::SwiftErrorResult:
3039 case ParameterABI::SwiftIndirectResult:
3040 mangleVendorQualifier(getParameterABISpelling(PI.getABI()));
3041 break;
3042 }
3043
3044 if (PI.isConsumed())
3045 mangleVendorQualifier("ns_consumed");
3046
3047 if (PI.isNoEscape())
3048 mangleVendorQualifier("noescape");
3049}
3050
3051// <type> ::= <function-type>
3052// <function-type> ::= [<CV-qualifiers>] F [Y]
3053// <bare-function-type> [<ref-qualifier>] E
3054void CXXNameMangler::mangleType(const FunctionProtoType *T) {
3055 mangleExtFunctionInfo(T);
3056
3057 // Mangle CV-qualifiers, if present. These are 'this' qualifiers,
3058 // e.g. "const" in "int (A::*)() const".
3059 mangleQualifiers(T->getMethodQuals());
3060
3061 // Mangle instantiation-dependent exception-specification, if present,
3062 // per cxx-abi-dev proposal on 2016-10-11.
3063 if (T->hasInstantiationDependentExceptionSpec()) {
3064 if (isComputedNoexcept(T->getExceptionSpecType())) {
3065 Out << "DO";
3066 mangleExpression(T->getNoexceptExpr());
3067 Out << "E";
3068 } else {
3069 assert(T->getExceptionSpecType() == EST_Dynamic)((T->getExceptionSpecType() == EST_Dynamic) ? static_cast<
void> (0) : __assert_fail ("T->getExceptionSpecType() == EST_Dynamic"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3069, __PRETTY_FUNCTION__))
;
3070 Out << "Dw";
3071 for (auto ExceptTy : T->exceptions())
3072 mangleType(ExceptTy);
3073 Out << "E";
3074 }
3075 } else if (T->isNothrow()) {
3076 Out << "Do";
3077 }
3078
3079 Out << 'F';
3080
3081 // FIXME: We don't have enough information in the AST to produce the 'Y'
3082 // encoding for extern "C" function types.
3083 mangleBareFunctionType(T, /*MangleReturnType=*/true);
3084
3085 // Mangle the ref-qualifier, if present.
3086 mangleRefQualifier(T->getRefQualifier());
3087
3088 Out << 'E';
3089}
3090
3091void CXXNameMangler::mangleType(const FunctionNoProtoType *T) {
3092 // Function types without prototypes can arise when mangling a function type
3093 // within an overloadable function in C. We mangle these as the absence of any
3094 // parameter types (not even an empty parameter list).
3095 Out << 'F';
3096
3097 FunctionTypeDepthState saved = FunctionTypeDepth.push();
3098
3099 FunctionTypeDepth.enterResultType();
3100 mangleType(T->getReturnType());
3101 FunctionTypeDepth.leaveResultType();
3102
3103 FunctionTypeDepth.pop(saved);
3104 Out << 'E';
3105}
3106
3107void CXXNameMangler::mangleBareFunctionType(const FunctionProtoType *Proto,
3108 bool MangleReturnType,
3109 const FunctionDecl *FD) {
3110 // Record that we're in a function type. See mangleFunctionParam
3111 // for details on what we're trying to achieve here.
3112 FunctionTypeDepthState saved = FunctionTypeDepth.push();
3113
3114 // <bare-function-type> ::= <signature type>+
3115 if (MangleReturnType) {
3116 FunctionTypeDepth.enterResultType();
3117
3118 // Mangle ns_returns_retained as an order-sensitive qualifier here.
3119 if (Proto->getExtInfo().getProducesResult() && FD == nullptr)
3120 mangleVendorQualifier("ns_returns_retained");
3121
3122 // Mangle the return type without any direct ARC ownership qualifiers.
3123 QualType ReturnTy = Proto->getReturnType();
3124 if (ReturnTy.getObjCLifetime()) {
3125 auto SplitReturnTy = ReturnTy.split();
3126 SplitReturnTy.Quals.removeObjCLifetime();
3127 ReturnTy = getASTContext().getQualifiedType(SplitReturnTy);
3128 }
3129 mangleType(ReturnTy);
3130
3131 FunctionTypeDepth.leaveResultType();
3132 }
3133
3134 if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
3135 // <builtin-type> ::= v # void
3136 Out << 'v';
3137
3138 FunctionTypeDepth.pop(saved);
3139 return;
3140 }
3141
3142 assert(!FD || FD->getNumParams() == Proto->getNumParams())((!FD || FD->getNumParams() == Proto->getNumParams()) ?
static_cast<void> (0) : __assert_fail ("!FD || FD->getNumParams() == Proto->getNumParams()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3142, __PRETTY_FUNCTION__))
;
3143 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
3144 // Mangle extended parameter info as order-sensitive qualifiers here.
3145 if (Proto->hasExtParameterInfos() && FD == nullptr) {
3146 mangleExtParameterInfo(Proto->getExtParameterInfo(I));
3147 }
3148
3149 // Mangle the type.
3150 QualType ParamTy = Proto->getParamType(I);
3151 mangleType(Context.getASTContext().getSignatureParameterType(ParamTy));
3152
3153 if (FD) {
3154 if (auto *Attr = FD->getParamDecl(I)->getAttr<PassObjectSizeAttr>()) {
3155 // Attr can only take 1 character, so we can hardcode the length below.
3156 assert(Attr->getType() <= 9 && Attr->getType() >= 0)((Attr->getType() <= 9 && Attr->getType() >=
0) ? static_cast<void> (0) : __assert_fail ("Attr->getType() <= 9 && Attr->getType() >= 0"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3156, __PRETTY_FUNCTION__))
;
3157 if (Attr->isDynamic())
3158 Out << "U25pass_dynamic_object_size" << Attr->getType();
3159 else
3160 Out << "U17pass_object_size" << Attr->getType();
3161 }
3162 }
3163 }
3164
3165 FunctionTypeDepth.pop(saved);
3166
3167 // <builtin-type> ::= z # ellipsis
3168 if (Proto->isVariadic())
3169 Out << 'z';
3170}
3171
3172// <type> ::= <class-enum-type>
3173// <class-enum-type> ::= <name>
3174void CXXNameMangler::mangleType(const UnresolvedUsingType *T) {
3175 mangleName(T->getDecl());
3176}
3177
3178// <type> ::= <class-enum-type>
3179// <class-enum-type> ::= <name>
3180void CXXNameMangler::mangleType(const EnumType *T) {
3181 mangleType(static_cast<const TagType*>(T));
3182}
3183void CXXNameMangler::mangleType(const RecordType *T) {
3184 mangleType(static_cast<const TagType*>(T));
3185}
3186void CXXNameMangler::mangleType(const TagType *T) {
3187 mangleName(T->getDecl());
3188}
3189
3190// <type> ::= <array-type>
3191// <array-type> ::= A <positive dimension number> _ <element type>
3192// ::= A [<dimension expression>] _ <element type>
3193void CXXNameMangler::mangleType(const ConstantArrayType *T) {
3194 Out << 'A' << T->getSize() << '_';
3195 mangleType(T->getElementType());
3196}
3197void CXXNameMangler::mangleType(const VariableArrayType *T) {
3198 Out << 'A';
3199 // decayed vla types (size 0) will just be skipped.
3200 if (T->getSizeExpr())
3201 mangleExpression(T->getSizeExpr());
3202 Out << '_';
3203 mangleType(T->getElementType());
3204}
3205void CXXNameMangler::mangleType(const DependentSizedArrayType *T) {
3206 Out << 'A';
3207 // A DependentSizedArrayType might not have size expression as below
3208 //
3209 // template<int ...N> int arr[] = {N...};
3210 if (T->getSizeExpr())
3211 mangleExpression(T->getSizeExpr());
3212 Out << '_';
3213 mangleType(T->getElementType());
3214}
3215void CXXNameMangler::mangleType(const IncompleteArrayType *T) {
3216 Out << "A_";
3217 mangleType(T->getElementType());
3218}
3219
3220// <type> ::= <pointer-to-member-type>
3221// <pointer-to-member-type> ::= M <class type> <member type>
3222void CXXNameMangler::mangleType(const MemberPointerType *T) {
3223 Out << 'M';
3224 mangleType(QualType(T->getClass(), 0));
3225 QualType PointeeType = T->getPointeeType();
3226 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) {
3227 mangleType(FPT);
3228
3229 // Itanium C++ ABI 5.1.8:
3230 //
3231 // The type of a non-static member function is considered to be different,
3232 // for the purposes of substitution, from the type of a namespace-scope or
3233 // static member function whose type appears similar. The types of two
3234 // non-static member functions are considered to be different, for the
3235 // purposes of substitution, if the functions are members of different
3236 // classes. In other words, for the purposes of substitution, the class of
3237 // which the function is a member is considered part of the type of
3238 // function.
3239
3240 // Given that we already substitute member function pointers as a
3241 // whole, the net effect of this rule is just to unconditionally
3242 // suppress substitution on the function type in a member pointer.
3243 // We increment the SeqID here to emulate adding an entry to the
3244 // substitution table.
3245 ++SeqID;
3246 } else
3247 mangleType(PointeeType);
3248}
3249
3250// <type> ::= <template-param>
3251void CXXNameMangler::mangleType(const TemplateTypeParmType *T) {
3252 mangleTemplateParameter(T->getDepth(), T->getIndex());
3253}
3254
3255// <type> ::= <template-param>
3256void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) {
3257 // FIXME: not clear how to mangle this!
3258 // template <class T...> class A {
3259 // template <class U...> void foo(T(*)(U) x...);
3260 // };
3261 Out << "_SUBSTPACK_";
3262}
3263
3264// <type> ::= P <type> # pointer-to
3265void CXXNameMangler::mangleType(const PointerType *T) {
3266 Out << 'P';
3267 mangleType(T->getPointeeType());
3268}
3269void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) {
3270 Out << 'P';
3271 mangleType(T->getPointeeType());
3272}
3273
3274// <type> ::= R <type> # reference-to
3275void CXXNameMangler::mangleType(const LValueReferenceType *T) {
3276 Out << 'R';
3277 mangleType(T->getPointeeType());
3278}
3279
3280// <type> ::= O <type> # rvalue reference-to (C++0x)
3281void CXXNameMangler::mangleType(const RValueReferenceType *T) {
3282 Out << 'O';
3283 mangleType(T->getPointeeType());
3284}
3285
3286// <type> ::= C <type> # complex pair (C 2000)
3287void CXXNameMangler::mangleType(const ComplexType *T) {
3288 Out << 'C';
3289 mangleType(T->getElementType());
3290}
3291
3292// ARM's ABI for Neon vector types specifies that they should be mangled as
3293// if they are structs (to match ARM's initial implementation). The
3294// vector type must be one of the special types predefined by ARM.
3295void CXXNameMangler::mangleNeonVectorType(const VectorType *T) {
3296 QualType EltType = T->getElementType();
3297 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType")((EltType->isBuiltinType() && "Neon vector element not a BuiltinType"
) ? static_cast<void> (0) : __assert_fail ("EltType->isBuiltinType() && \"Neon vector element not a BuiltinType\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3297, __PRETTY_FUNCTION__))
;
3298 const char *EltName = nullptr;
3299 if (T->getVectorKind() == VectorType::NeonPolyVector) {
3300 switch (cast<BuiltinType>(EltType)->getKind()) {
3301 case BuiltinType::SChar:
3302 case BuiltinType::UChar:
3303 EltName = "poly8_t";
3304 break;
3305 case BuiltinType::Short:
3306 case BuiltinType::UShort:
3307 EltName = "poly16_t";
3308 break;
3309 case BuiltinType::LongLong:
3310 case BuiltinType::ULongLong:
3311 EltName = "poly64_t";
3312 break;
3313 default: llvm_unreachable("unexpected Neon polynomial vector element type")::llvm::llvm_unreachable_internal("unexpected Neon polynomial vector element type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3313)
;
3314 }
3315 } else {
3316 switch (cast<BuiltinType>(EltType)->getKind()) {
3317 case BuiltinType::SChar: EltName = "int8_t"; break;
3318 case BuiltinType::UChar: EltName = "uint8_t"; break;
3319 case BuiltinType::Short: EltName = "int16_t"; break;
3320 case BuiltinType::UShort: EltName = "uint16_t"; break;
3321 case BuiltinType::Int: EltName = "int32_t"; break;
3322 case BuiltinType::UInt: EltName = "uint32_t"; break;
3323 case BuiltinType::LongLong: EltName = "int64_t"; break;
3324 case BuiltinType::ULongLong: EltName = "uint64_t"; break;
3325 case BuiltinType::Double: EltName = "float64_t"; break;
3326 case BuiltinType::Float: EltName = "float32_t"; break;
3327 case BuiltinType::Half: EltName = "float16_t"; break;
3328 case BuiltinType::BFloat16: EltName = "bfloat16_t"; break;
3329 default:
3330 llvm_unreachable("unexpected Neon vector element type")::llvm::llvm_unreachable_internal("unexpected Neon vector element type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3330)
;
3331 }
3332 }
3333 const char *BaseName = nullptr;
3334 unsigned BitSize = (T->getNumElements() *
3335 getASTContext().getTypeSize(EltType));
3336 if (BitSize == 64)
3337 BaseName = "__simd64_";
3338 else {
3339 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits")((BitSize == 128 && "Neon vector type not 64 or 128 bits"
) ? static_cast<void> (0) : __assert_fail ("BitSize == 128 && \"Neon vector type not 64 or 128 bits\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3339, __PRETTY_FUNCTION__))
;
3340 BaseName = "__simd128_";
3341 }
3342 Out << strlen(BaseName) + strlen(EltName);
3343 Out << BaseName << EltName;
3344}
3345
3346void CXXNameMangler::mangleNeonVectorType(const DependentVectorType *T) {
3347 DiagnosticsEngine &Diags = Context.getDiags();
3348 unsigned DiagID = Diags.getCustomDiagID(
3349 DiagnosticsEngine::Error,
3350 "cannot mangle this dependent neon vector type yet");
3351 Diags.Report(T->getAttributeLoc(), DiagID);
3352}
3353
3354static StringRef mangleAArch64VectorBase(const BuiltinType *EltType) {
3355 switch (EltType->getKind()) {
3356 case BuiltinType::SChar:
3357 return "Int8";
3358 case BuiltinType::Short:
3359 return "Int16";
3360 case BuiltinType::Int:
3361 return "Int32";
3362 case BuiltinType::Long:
3363 case BuiltinType::LongLong:
3364 return "Int64";
3365 case BuiltinType::UChar:
3366 return "Uint8";
3367 case BuiltinType::UShort:
3368 return "Uint16";
3369 case BuiltinType::UInt:
3370 return "Uint32";
3371 case BuiltinType::ULong:
3372 case BuiltinType::ULongLong:
3373 return "Uint64";
3374 case BuiltinType::Half:
3375 return "Float16";
3376 case BuiltinType::Float:
3377 return "Float32";
3378 case BuiltinType::Double:
3379 return "Float64";
3380 case BuiltinType::BFloat16:
3381 return "Bfloat16";
3382 default:
3383 llvm_unreachable("Unexpected vector element base type")::llvm::llvm_unreachable_internal("Unexpected vector element base type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3383)
;
3384 }
3385}
3386
3387// AArch64's ABI for Neon vector types specifies that they should be mangled as
3388// the equivalent internal name. The vector type must be one of the special
3389// types predefined by ARM.
3390void CXXNameMangler::mangleAArch64NeonVectorType(const VectorType *T) {
3391 QualType EltType = T->getElementType();
3392 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType")((EltType->isBuiltinType() && "Neon vector element not a BuiltinType"
) ? static_cast<void> (0) : __assert_fail ("EltType->isBuiltinType() && \"Neon vector element not a BuiltinType\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3392, __PRETTY_FUNCTION__))
;
3393 unsigned BitSize =
3394 (T->getNumElements() * getASTContext().getTypeSize(EltType));
3395 (void)BitSize; // Silence warning.
3396
3397 assert((BitSize == 64 || BitSize == 128) &&(((BitSize == 64 || BitSize == 128) && "Neon vector type not 64 or 128 bits"
) ? static_cast<void> (0) : __assert_fail ("(BitSize == 64 || BitSize == 128) && \"Neon vector type not 64 or 128 bits\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3398, __PRETTY_FUNCTION__))
3398 "Neon vector type not 64 or 128 bits")(((BitSize == 64 || BitSize == 128) && "Neon vector type not 64 or 128 bits"
) ? static_cast<void> (0) : __assert_fail ("(BitSize == 64 || BitSize == 128) && \"Neon vector type not 64 or 128 bits\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3398, __PRETTY_FUNCTION__))
;
3399
3400 StringRef EltName;
3401 if (T->getVectorKind() == VectorType::NeonPolyVector) {
3402 switch (cast<BuiltinType>(EltType)->getKind()) {
3403 case BuiltinType::UChar:
3404 EltName = "Poly8";
3405 break;
3406 case BuiltinType::UShort:
3407 EltName = "Poly16";
3408 break;
3409 case BuiltinType::ULong:
3410 case BuiltinType::ULongLong:
3411 EltName = "Poly64";
3412 break;
3413 default:
3414 llvm_unreachable("unexpected Neon polynomial vector element type")::llvm::llvm_unreachable_internal("unexpected Neon polynomial vector element type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3414)
;
3415 }
3416 } else
3417 EltName = mangleAArch64VectorBase(cast<BuiltinType>(EltType));
3418
3419 std::string TypeName =
3420 ("__" + EltName + "x" + Twine(T->getNumElements()) + "_t").str();
3421 Out << TypeName.length() << TypeName;
3422}
3423void CXXNameMangler::mangleAArch64NeonVectorType(const DependentVectorType *T) {
3424 DiagnosticsEngine &Diags = Context.getDiags();
3425 unsigned DiagID = Diags.getCustomDiagID(
3426 DiagnosticsEngine::Error,
3427 "cannot mangle this dependent neon vector type yet");
3428 Diags.Report(T->getAttributeLoc(), DiagID);
3429}
3430
3431// The AArch64 ACLE specifies that fixed-length SVE vector and predicate types
3432// defined with the 'arm_sve_vector_bits' attribute map to the same AAPCS64
3433// type as the sizeless variants.
3434//
3435// The mangling scheme for VLS types is implemented as a "pseudo" template:
3436//
3437// '__SVE_VLS<<type>, <vector length>>'
3438//
3439// Combining the existing SVE type and a specific vector length (in bits).
3440// For example:
3441//
3442// typedef __SVInt32_t foo __attribute__((arm_sve_vector_bits(512)));
3443//
3444// is described as '__SVE_VLS<__SVInt32_t, 512u>' and mangled as:
3445//
3446// "9__SVE_VLSI" + base type mangling + "Lj" + __ARM_FEATURE_SVE_BITS + "EE"
3447//
3448// i.e. 9__SVE_VLSIu11__SVInt32_tLj512EE
3449//
3450// The latest ACLE specification (00bet5) does not contain details of this
3451// mangling scheme, it will be specified in the next revision. The mangling
3452// scheme is otherwise defined in the appendices to the Procedure Call Standard
3453// for the Arm Architecture, see
3454// https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst#appendix-c-mangling
3455void CXXNameMangler::mangleAArch64FixedSveVectorType(const VectorType *T) {
3456 assert((T->getVectorKind() == VectorType::SveFixedLengthDataVector ||(((T->getVectorKind() == VectorType::SveFixedLengthDataVector
|| T->getVectorKind() == VectorType::SveFixedLengthPredicateVector
) && "expected fixed-length SVE vector!") ? static_cast
<void> (0) : __assert_fail ("(T->getVectorKind() == VectorType::SveFixedLengthDataVector || T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) && \"expected fixed-length SVE vector!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3458, __PRETTY_FUNCTION__))
3457 T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) &&(((T->getVectorKind() == VectorType::SveFixedLengthDataVector
|| T->getVectorKind() == VectorType::SveFixedLengthPredicateVector
) && "expected fixed-length SVE vector!") ? static_cast
<void> (0) : __assert_fail ("(T->getVectorKind() == VectorType::SveFixedLengthDataVector || T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) && \"expected fixed-length SVE vector!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3458, __PRETTY_FUNCTION__))
3458 "expected fixed-length SVE vector!")(((T->getVectorKind() == VectorType::SveFixedLengthDataVector
|| T->getVectorKind() == VectorType::SveFixedLengthPredicateVector
) && "expected fixed-length SVE vector!") ? static_cast
<void> (0) : __assert_fail ("(T->getVectorKind() == VectorType::SveFixedLengthDataVector || T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) && \"expected fixed-length SVE vector!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3458, __PRETTY_FUNCTION__))
;
3459
3460 QualType EltType = T->getElementType();
3461 assert(EltType->isBuiltinType() &&((EltType->isBuiltinType() && "expected builtin type for fixed-length SVE vector!"
) ? static_cast<void> (0) : __assert_fail ("EltType->isBuiltinType() && \"expected builtin type for fixed-length SVE vector!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3462, __PRETTY_FUNCTION__))
3462 "expected builtin type for fixed-length SVE vector!")((EltType->isBuiltinType() && "expected builtin type for fixed-length SVE vector!"
) ? static_cast<void> (0) : __assert_fail ("EltType->isBuiltinType() && \"expected builtin type for fixed-length SVE vector!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3462, __PRETTY_FUNCTION__))
;
3463
3464 StringRef TypeName;
3465 switch (cast<BuiltinType>(EltType)->getKind()) {
3466 case BuiltinType::SChar:
3467 TypeName = "__SVInt8_t";
3468 break;
3469 case BuiltinType::UChar: {
3470 if (T->getVectorKind() == VectorType::SveFixedLengthDataVector)
3471 TypeName = "__SVUint8_t";
3472 else
3473 TypeName = "__SVBool_t";
3474 break;
3475 }
3476 case BuiltinType::Short:
3477 TypeName = "__SVInt16_t";
3478 break;
3479 case BuiltinType::UShort:
3480 TypeName = "__SVUint16_t";
3481 break;
3482 case BuiltinType::Int:
3483 TypeName = "__SVInt32_t";
3484 break;
3485 case BuiltinType::UInt:
3486 TypeName = "__SVUint32_t";
3487 break;
3488 case BuiltinType::Long:
3489 TypeName = "__SVInt64_t";
3490 break;
3491 case BuiltinType::ULong:
3492 TypeName = "__SVUint64_t";
3493 break;
3494 case BuiltinType::Half:
3495 TypeName = "__SVFloat16_t";
3496 break;
3497 case BuiltinType::Float:
3498 TypeName = "__SVFloat32_t";
3499 break;
3500 case BuiltinType::Double:
3501 TypeName = "__SVFloat64_t";
3502 break;
3503 case BuiltinType::BFloat16:
3504 TypeName = "__SVBfloat16_t";
3505 break;
3506 default:
3507 llvm_unreachable("unexpected element type for fixed-length SVE vector!")::llvm::llvm_unreachable_internal("unexpected element type for fixed-length SVE vector!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3507)
;
3508 }
3509
3510 unsigned VecSizeInBits = getASTContext().getTypeInfo(T).Width;
3511
3512 if (T->getVectorKind() == VectorType::SveFixedLengthPredicateVector)
3513 VecSizeInBits *= 8;
3514
3515 Out << "9__SVE_VLSI" << 'u' << TypeName.size() << TypeName << "Lj"
3516 << VecSizeInBits << "EE";
3517}
3518
3519void CXXNameMangler::mangleAArch64FixedSveVectorType(
3520 const DependentVectorType *T) {
3521 DiagnosticsEngine &Diags = Context.getDiags();
3522 unsigned DiagID = Diags.getCustomDiagID(
3523 DiagnosticsEngine::Error,
3524 "cannot mangle this dependent fixed-length SVE vector type yet");
3525 Diags.Report(T->getAttributeLoc(), DiagID);
3526}
3527
3528// GNU extension: vector types
3529// <type> ::= <vector-type>
3530// <vector-type> ::= Dv <positive dimension number> _
3531// <extended element type>
3532// ::= Dv [<dimension expression>] _ <element type>
3533// <extended element type> ::= <element type>
3534// ::= p # AltiVec vector pixel
3535// ::= b # Altivec vector bool
3536void CXXNameMangler::mangleType(const VectorType *T) {
3537 if ((T->getVectorKind() == VectorType::NeonVector ||
3538 T->getVectorKind() == VectorType::NeonPolyVector)) {
3539 llvm::Triple Target = getASTContext().getTargetInfo().getTriple();
3540 llvm::Triple::ArchType Arch =
3541 getASTContext().getTargetInfo().getTriple().getArch();
3542 if ((Arch == llvm::Triple::aarch64 ||
3543 Arch == llvm::Triple::aarch64_be) && !Target.isOSDarwin())
3544 mangleAArch64NeonVectorType(T);
3545 else
3546 mangleNeonVectorType(T);
3547 return;
3548 } else if (T->getVectorKind() == VectorType::SveFixedLengthDataVector ||
3549 T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) {
3550 mangleAArch64FixedSveVectorType(T);
3551 return;
3552 }
3553 Out << "Dv" << T->getNumElements() << '_';
3554 if (T->getVectorKind() == VectorType::AltiVecPixel)
3555 Out << 'p';
3556 else if (T->getVectorKind() == VectorType::AltiVecBool)
3557 Out << 'b';
3558 else
3559 mangleType(T->getElementType());
3560}
3561
3562void CXXNameMangler::mangleType(const DependentVectorType *T) {
3563 if ((T->getVectorKind() == VectorType::NeonVector ||
3564 T->getVectorKind() == VectorType::NeonPolyVector)) {
3565 llvm::Triple Target = getASTContext().getTargetInfo().getTriple();
3566 llvm::Triple::ArchType Arch =
3567 getASTContext().getTargetInfo().getTriple().getArch();
3568 if ((Arch == llvm::Triple::aarch64 || Arch == llvm::Triple::aarch64_be) &&
3569 !Target.isOSDarwin())
3570 mangleAArch64NeonVectorType(T);
3571 else
3572 mangleNeonVectorType(T);
3573 return;
3574 } else if (T->getVectorKind() == VectorType::SveFixedLengthDataVector ||
3575 T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) {
3576 mangleAArch64FixedSveVectorType(T);
3577 return;
3578 }
3579
3580 Out << "Dv";
3581 mangleExpression(T->getSizeExpr());
3582 Out << '_';
3583 if (T->getVectorKind() == VectorType::AltiVecPixel)
3584 Out << 'p';
3585 else if (T->getVectorKind() == VectorType::AltiVecBool)
3586 Out << 'b';
3587 else
3588 mangleType(T->getElementType());
3589}
3590
3591void CXXNameMangler::mangleType(const ExtVectorType *T) {
3592 mangleType(static_cast<const VectorType*>(T));
3593}
3594void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) {
3595 Out << "Dv";
3596 mangleExpression(T->getSizeExpr());
3597 Out << '_';
3598 mangleType(T->getElementType());
3599}
3600
3601void CXXNameMangler::mangleType(const ConstantMatrixType *T) {
3602 // Mangle matrix types as a vendor extended type:
3603 // u<Len>matrix_typeI<Rows><Columns><element type>E
3604
3605 StringRef VendorQualifier = "matrix_type";
3606 Out << "u" << VendorQualifier.size() << VendorQualifier;
3607
3608 Out << "I";
3609 auto &ASTCtx = getASTContext();
3610 unsigned BitWidth = ASTCtx.getTypeSize(ASTCtx.getSizeType());
3611 llvm::APSInt Rows(BitWidth);
3612 Rows = T->getNumRows();
3613 mangleIntegerLiteral(ASTCtx.getSizeType(), Rows);
3614 llvm::APSInt Columns(BitWidth);
3615 Columns = T->getNumColumns();
3616 mangleIntegerLiteral(ASTCtx.getSizeType(), Columns);
3617 mangleType(T->getElementType());
3618 Out << "E";
3619}
3620
3621void CXXNameMangler::mangleType(const DependentSizedMatrixType *T) {
3622 // Mangle matrix types as a vendor extended type:
3623 // u<Len>matrix_typeI<row expr><column expr><element type>E
3624 StringRef VendorQualifier = "matrix_type";
3625 Out << "u" << VendorQualifier.size() << VendorQualifier;
3626
3627 Out << "I";
3628 mangleTemplateArgExpr(T->getRowExpr());
3629 mangleTemplateArgExpr(T->getColumnExpr());
3630 mangleType(T->getElementType());
3631 Out << "E";
3632}
3633
3634void CXXNameMangler::mangleType(const DependentAddressSpaceType *T) {
3635 SplitQualType split = T->getPointeeType().split();
3636 mangleQualifiers(split.Quals, T);
3637 mangleType(QualType(split.Ty, 0));
3638}
3639
3640void CXXNameMangler::mangleType(const PackExpansionType *T) {
3641 // <type> ::= Dp <type> # pack expansion (C++0x)
3642 Out << "Dp";
3643 mangleType(T->getPattern());
3644}
3645
3646void CXXNameMangler::mangleType(const ObjCInterfaceType *T) {
3647 mangleSourceName(T->getDecl()->getIdentifier());
3648}
3649
3650void CXXNameMangler::mangleType(const ObjCObjectType *T) {
3651 // Treat __kindof as a vendor extended type qualifier.
3652 if (T->isKindOfType())
3653 Out << "U8__kindof";
3654
3655 if (!T->qual_empty()) {
3656 // Mangle protocol qualifiers.
3657 SmallString<64> QualStr;
3658 llvm::raw_svector_ostream QualOS(QualStr);
3659 QualOS << "objcproto";
3660 for (const auto *I : T->quals()) {
3661 StringRef name = I->getName();
3662 QualOS << name.size() << name;
3663 }
3664 Out << 'U' << QualStr.size() << QualStr;
3665 }
3666
3667 mangleType(T->getBaseType());
3668
3669 if (T->isSpecialized()) {
3670 // Mangle type arguments as I <type>+ E
3671 Out << 'I';
3672 for (auto typeArg : T->getTypeArgs())
3673 mangleType(typeArg);
3674 Out << 'E';
3675 }
3676}
3677
3678void CXXNameMangler::mangleType(const BlockPointerType *T) {
3679 Out << "U13block_pointer";
3680 mangleType(T->getPointeeType());
3681}
3682
3683void CXXNameMangler::mangleType(const InjectedClassNameType *T) {
3684 // Mangle injected class name types as if the user had written the
3685 // specialization out fully. It may not actually be possible to see
3686 // this mangling, though.
3687 mangleType(T->getInjectedSpecializationType());
3688}
3689
3690void CXXNameMangler::mangleType(const TemplateSpecializationType *T) {
3691 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) {
3692 mangleTemplateName(TD, T->getArgs(), T->getNumArgs());
3693 } else {
3694 if (mangleSubstitution(QualType(T, 0)))
3695 return;
3696
3697 mangleTemplatePrefix(T->getTemplateName());
3698
3699 // FIXME: GCC does not appear to mangle the template arguments when
3700 // the template in question is a dependent template name. Should we
3701 // emulate that badness?
3702 mangleTemplateArgs(T->getTemplateName(), T->getArgs(), T->getNumArgs());
3703 addSubstitution(QualType(T, 0));
3704 }
3705}
3706
3707void CXXNameMangler::mangleType(const DependentNameType *T) {
3708 // Proposal by cxx-abi-dev, 2014-03-26
3709 // <class-enum-type> ::= <name> # non-dependent or dependent type name or
3710 // # dependent elaborated type specifier using
3711 // # 'typename'
3712 // ::= Ts <name> # dependent elaborated type specifier using
3713 // # 'struct' or 'class'
3714 // ::= Tu <name> # dependent elaborated type specifier using
3715 // # 'union'
3716 // ::= Te <name> # dependent elaborated type specifier using
3717 // # 'enum'
3718 switch (T->getKeyword()) {
3719 case ETK_None:
3720 case ETK_Typename:
3721 break;
3722 case ETK_Struct:
3723 case ETK_Class:
3724 case ETK_Interface:
3725 Out << "Ts";
3726 break;
3727 case ETK_Union:
3728 Out << "Tu";
3729 break;
3730 case ETK_Enum:
3731 Out << "Te";
3732 break;
3733 }
3734 // Typename types are always nested
3735 Out << 'N';
3736 manglePrefix(T->getQualifier());
3737 mangleSourceName(T->getIdentifier());
3738 Out << 'E';
3739}
3740
3741void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) {
3742 // Dependently-scoped template types are nested if they have a prefix.
3743 Out << 'N';
3744
3745 // TODO: avoid making this TemplateName.
3746 TemplateName Prefix =
3747 getASTContext().getDependentTemplateName(T->getQualifier(),
3748 T->getIdentifier());
3749 mangleTemplatePrefix(Prefix);
3750
3751 // FIXME: GCC does not appear to mangle the template arguments when
3752 // the template in question is a dependent template name. Should we
3753 // emulate that badness?
3754 mangleTemplateArgs(Prefix, T->getArgs(), T->getNumArgs());
3755 Out << 'E';
3756}
3757
3758void CXXNameMangler::mangleType(const TypeOfType *T) {
3759 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3760 // "extension with parameters" mangling.
3761 Out << "u6typeof";
3762}
3763
3764void CXXNameMangler::mangleType(const TypeOfExprType *T) {
3765 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3766 // "extension with parameters" mangling.
3767 Out << "u6typeof";
3768}
3769
3770void CXXNameMangler::mangleType(const DecltypeType *T) {
3771 Expr *E = T->getUnderlyingExpr();
3772
3773 // type ::= Dt <expression> E # decltype of an id-expression
3774 // # or class member access
3775 // ::= DT <expression> E # decltype of an expression
3776
3777 // This purports to be an exhaustive list of id-expressions and
3778 // class member accesses. Note that we do not ignore parentheses;
3779 // parentheses change the semantics of decltype for these
3780 // expressions (and cause the mangler to use the other form).
3781 if (isa<DeclRefExpr>(E) ||
3782 isa<MemberExpr>(E) ||
3783 isa<UnresolvedLookupExpr>(E) ||
3784 isa<DependentScopeDeclRefExpr>(E) ||
3785 isa<CXXDependentScopeMemberExpr>(E) ||
3786 isa<UnresolvedMemberExpr>(E))
3787 Out << "Dt";
3788 else
3789 Out << "DT";
3790 mangleExpression(E);
3791 Out << 'E';
3792}
3793
3794void CXXNameMangler::mangleType(const UnaryTransformType *T) {
3795 // If this is dependent, we need to record that. If not, we simply
3796 // mangle it as the underlying type since they are equivalent.
3797 if (T->isDependentType()) {
3798 Out << 'U';
3799
3800 switch (T->getUTTKind()) {
3801 case UnaryTransformType::EnumUnderlyingType:
3802 Out << "3eut";
3803 break;
3804 }
3805 }
3806
3807 mangleType(T->getBaseType());
3808}
3809
3810void CXXNameMangler::mangleType(const AutoType *T) {
3811 assert(T->getDeducedType().isNull() &&((T->getDeducedType().isNull() && "Deduced AutoType shouldn't be handled here!"
) ? static_cast<void> (0) : __assert_fail ("T->getDeducedType().isNull() && \"Deduced AutoType shouldn't be handled here!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3812, __PRETTY_FUNCTION__))
3812 "Deduced AutoType shouldn't be handled here!")((T->getDeducedType().isNull() && "Deduced AutoType shouldn't be handled here!"
) ? static_cast<void> (0) : __assert_fail ("T->getDeducedType().isNull() && \"Deduced AutoType shouldn't be handled here!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3812, __PRETTY_FUNCTION__))
;
3813 assert(T->getKeyword() != AutoTypeKeyword::GNUAutoType &&((T->getKeyword() != AutoTypeKeyword::GNUAutoType &&
"shouldn't need to mangle __auto_type!") ? static_cast<void
> (0) : __assert_fail ("T->getKeyword() != AutoTypeKeyword::GNUAutoType && \"shouldn't need to mangle __auto_type!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3814, __PRETTY_FUNCTION__))
3814 "shouldn't need to mangle __auto_type!")((T->getKeyword() != AutoTypeKeyword::GNUAutoType &&
"shouldn't need to mangle __auto_type!") ? static_cast<void
> (0) : __assert_fail ("T->getKeyword() != AutoTypeKeyword::GNUAutoType && \"shouldn't need to mangle __auto_type!\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3814, __PRETTY_FUNCTION__))
;
3815 // <builtin-type> ::= Da # auto
3816 // ::= Dc # decltype(auto)
3817 Out << (T->isDecltypeAuto() ? "Dc" : "Da");
3818}
3819
3820void CXXNameMangler::mangleType(const DeducedTemplateSpecializationType *T) {
3821 QualType Deduced = T->getDeducedType();
3822 if (!Deduced.isNull())
3823 return mangleType(Deduced);
3824
3825 TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl();
3826 assert(TD && "shouldn't form deduced TST unless we know we have a template")((TD && "shouldn't form deduced TST unless we know we have a template"
) ? static_cast<void> (0) : __assert_fail ("TD && \"shouldn't form deduced TST unless we know we have a template\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3826, __PRETTY_FUNCTION__))
;
3827
3828 if (mangleSubstitution(TD))
3829 return;
3830
3831 mangleName(GlobalDecl(TD));
3832 addSubstitution(TD);
3833}
3834
3835void CXXNameMangler::mangleType(const AtomicType *T) {
3836 // <type> ::= U <source-name> <type> # vendor extended type qualifier
3837 // (Until there's a standardized mangling...)
3838 Out << "U7_Atomic";
3839 mangleType(T->getValueType());
3840}
3841
3842void CXXNameMangler::mangleType(const PipeType *T) {
3843 // Pipe type mangling rules are described in SPIR 2.0 specification
3844 // A.1 Data types and A.3 Summary of changes
3845 // <type> ::= 8ocl_pipe
3846 Out << "8ocl_pipe";
3847}
3848
3849void CXXNameMangler::mangleType(const ExtIntType *T) {
3850 Out << "U7_ExtInt";
3851 llvm::APSInt BW(32, true);
3852 BW = T->getNumBits();
3853 TemplateArgument TA(Context.getASTContext(), BW, getASTContext().IntTy);
3854 mangleTemplateArgs(TemplateName(), &TA, 1);
3855 if (T->isUnsigned())
3856 Out << "j";
3857 else
3858 Out << "i";
3859}
3860
3861void CXXNameMangler::mangleType(const DependentExtIntType *T) {
3862 Out << "U7_ExtInt";
3863 TemplateArgument TA(T->getNumBitsExpr());
3864 mangleTemplateArgs(TemplateName(), &TA, 1);
3865 if (T->isUnsigned())
3866 Out << "j";
3867 else
3868 Out << "i";
3869}
3870
3871void CXXNameMangler::mangleIntegerLiteral(QualType T,
3872 const llvm::APSInt &Value) {
3873 // <expr-primary> ::= L <type> <value number> E # integer literal
3874 Out << 'L';
3875
3876 mangleType(T);
3877 if (T->isBooleanType()) {
3878 // Boolean values are encoded as 0/1.
3879 Out << (Value.getBoolValue() ? '1' : '0');
3880 } else {
3881 mangleNumber(Value);
3882 }
3883 Out << 'E';
3884
3885}
3886
3887void CXXNameMangler::mangleMemberExprBase(const Expr *Base, bool IsArrow) {
3888 // Ignore member expressions involving anonymous unions.
3889 while (const auto *RT = Base->getType()->getAs<RecordType>()) {
3890 if (!RT->getDecl()->isAnonymousStructOrUnion())
3891 break;
3892 const auto *ME = dyn_cast<MemberExpr>(Base);
3893 if (!ME)
3894 break;
3895 Base = ME->getBase();
3896 IsArrow = ME->isArrow();
3897 }
3898
3899 if (Base->isImplicitCXXThis()) {
3900 // Note: GCC mangles member expressions to the implicit 'this' as
3901 // *this., whereas we represent them as this->. The Itanium C++ ABI
3902 // does not specify anything here, so we follow GCC.
3903 Out << "dtdefpT";
3904 } else {
3905 Out << (IsArrow ? "pt" : "dt");
3906 mangleExpression(Base);
3907 }
3908}
3909
3910/// Mangles a member expression.
3911void CXXNameMangler::mangleMemberExpr(const Expr *base,
3912 bool isArrow,
3913 NestedNameSpecifier *qualifier,
3914 NamedDecl *firstQualifierLookup,
3915 DeclarationName member,
3916 const TemplateArgumentLoc *TemplateArgs,
3917 unsigned NumTemplateArgs,
3918 unsigned arity) {
3919 // <expression> ::= dt <expression> <unresolved-name>
3920 // ::= pt <expression> <unresolved-name>
3921 if (base)
3922 mangleMemberExprBase(base, isArrow);
3923 mangleUnresolvedName(qualifier, member, TemplateArgs, NumTemplateArgs, arity);
3924}
3925
3926/// Look at the callee of the given call expression and determine if
3927/// it's a parenthesized id-expression which would have triggered ADL
3928/// otherwise.
3929static bool isParenthesizedADLCallee(const CallExpr *call) {
3930 const Expr *callee = call->getCallee();
3931 const Expr *fn = callee->IgnoreParens();
3932
3933 // Must be parenthesized. IgnoreParens() skips __extension__ nodes,
3934 // too, but for those to appear in the callee, it would have to be
3935 // parenthesized.
3936 if (callee == fn) return false;
3937
3938 // Must be an unresolved lookup.
3939 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn);
3940 if (!lookup) return false;
3941
3942 assert(!lookup->requiresADL())((!lookup->requiresADL()) ? static_cast<void> (0) : __assert_fail
("!lookup->requiresADL()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 3942, __PRETTY_FUNCTION__))
;
3943
3944 // Must be an unqualified lookup.
3945 if (lookup->getQualifier()) return false;
3946
3947 // Must not have found a class member. Note that if one is a class
3948 // member, they're all class members.
3949 if (lookup->getNumDecls() > 0 &&
3950 (*lookup->decls_begin())->isCXXClassMember())
3951 return false;
3952
3953 // Otherwise, ADL would have been triggered.
3954 return true;
3955}
3956
3957void CXXNameMangler::mangleCastExpression(const Expr *E, StringRef CastEncoding) {
3958 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E);
3959 Out << CastEncoding;
3960 mangleType(ECE->getType());
3961 mangleExpression(ECE->getSubExpr());
3962}
3963
3964void CXXNameMangler::mangleInitListElements(const InitListExpr *InitList) {
3965 if (auto *Syntactic = InitList->getSyntacticForm())
3966 InitList = Syntactic;
3967 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i)
3968 mangleExpression(InitList->getInit(i));
3969}
3970
3971void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
3972 bool AsTemplateArg) {
3973 // <expression> ::= <unary operator-name> <expression>
3974 // ::= <binary operator-name> <expression> <expression>
3975 // ::= <trinary operator-name> <expression> <expression> <expression>
3976 // ::= cv <type> expression # conversion with one argument
3977 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments
3978 // ::= dc <type> <expression> # dynamic_cast<type> (expression)
3979 // ::= sc <type> <expression> # static_cast<type> (expression)
3980 // ::= cc <type> <expression> # const_cast<type> (expression)
3981 // ::= rc <type> <expression> # reinterpret_cast<type> (expression)
3982 // ::= st <type> # sizeof (a type)
3983 // ::= at <type> # alignof (a type)
3984 // ::= <template-param>
3985 // ::= <function-param>
3986 // ::= fpT # 'this' expression (part of <function-param>)
3987 // ::= sr <type> <unqualified-name> # dependent name
3988 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id
3989 // ::= ds <expression> <expression> # expr.*expr
3990 // ::= sZ <template-param> # size of a parameter pack
3991 // ::= sZ <function-param> # size of a function parameter pack
3992 // ::= u <source-name> <template-arg>* E # vendor extended expression
3993 // ::= <expr-primary>
3994 // <expr-primary> ::= L <type> <value number> E # integer literal
3995 // ::= L <type> <value float> E # floating literal
3996 // ::= L <type> <string type> E # string literal
3997 // ::= L <nullptr type> E # nullptr literal "LDnE"
3998 // ::= L <pointer type> 0 E # null pointer template argument
3999 // ::= L <type> <real-part float> _ <imag-part float> E # complex floating point literal (C99); not used by clang
4000 // ::= L <mangled-name> E # external name
4001 QualType ImplicitlyConvertedToType;
4002
4003 // A top-level expression that's not <expr-primary> needs to be wrapped in
4004 // X...E in a template arg.
4005 bool IsPrimaryExpr = true;
4006 auto NotPrimaryExpr = [&] {
4007 if (AsTemplateArg && IsPrimaryExpr)
4008 Out << 'X';
4009 IsPrimaryExpr = false;
4010 };
4011
4012 auto MangleDeclRefExpr = [&](const NamedDecl *D) {
4013 switch (D->getKind()) {
4014 default:
4015 // <expr-primary> ::= L <mangled-name> E # external name
4016 Out << 'L';
4017 mangle(D);
4018 Out << 'E';
4019 break;
4020
4021 case Decl::ParmVar:
4022 NotPrimaryExpr();
4023 mangleFunctionParam(cast<ParmVarDecl>(D));
4024 break;
4025
4026 case Decl::EnumConstant: {
4027 // <expr-primary>
4028 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D);
4029 mangleIntegerLiteral(ED->getType(), ED->getInitVal());
4030 break;
4031 }
4032
4033 case Decl::NonTypeTemplateParm:
4034 NotPrimaryExpr();
4035 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D);
4036 mangleTemplateParameter(PD->getDepth(), PD->getIndex());
4037 break;
4038 }
4039 };
4040
4041 // 'goto recurse' is used when handling a simple "unwrapping" node which
4042 // produces no output, where ImplicitlyConvertedToType and AsTemplateArg need
4043 // to be preserved.
4044recurse:
4045 switch (E->getStmtClass()) {
4046 case Expr::NoStmtClass:
4047#define ABSTRACT_STMT(Type)
4048#define EXPR(Type, Base)
4049#define STMT(Type, Base) \
4050 case Expr::Type##Class:
4051#include "clang/AST/StmtNodes.inc"
4052 // fallthrough
4053
4054 // These all can only appear in local or variable-initialization
4055 // contexts and so should never appear in a mangling.
4056 case Expr::AddrLabelExprClass:
4057 case Expr::DesignatedInitUpdateExprClass:
4058 case Expr::ImplicitValueInitExprClass:
4059 case Expr::ArrayInitLoopExprClass:
4060 case Expr::ArrayInitIndexExprClass:
4061 case Expr::NoInitExprClass:
4062 case Expr::ParenListExprClass:
4063 case Expr::LambdaExprClass:
4064 case Expr::MSPropertyRefExprClass:
4065 case Expr::MSPropertySubscriptExprClass:
4066 case Expr::TypoExprClass: // This should no longer exist in the AST by now.
4067 case Expr::RecoveryExprClass:
4068 case Expr::OMPArraySectionExprClass:
4069 case Expr::OMPArrayShapingExprClass:
4070 case Expr::OMPIteratorExprClass:
4071 case Expr::CXXInheritedCtorInitExprClass:
4072 llvm_unreachable("unexpected statement kind")::llvm::llvm_unreachable_internal("unexpected statement kind"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4072)
;
4073
4074 case Expr::ConstantExprClass:
4075 E = cast<ConstantExpr>(E)->getSubExpr();
4076 goto recurse;
4077
4078 // FIXME: invent manglings for all these.
4079 case Expr::BlockExprClass:
4080 case Expr::ChooseExprClass:
4081 case Expr::CompoundLiteralExprClass:
4082 case Expr::ExtVectorElementExprClass:
4083 case Expr::GenericSelectionExprClass:
4084 case Expr::ObjCEncodeExprClass:
4085 case Expr::ObjCIsaExprClass:
4086 case Expr::ObjCIvarRefExprClass:
4087 case Expr::ObjCMessageExprClass:
4088 case Expr::ObjCPropertyRefExprClass:
4089 case Expr::ObjCProtocolExprClass:
4090 case Expr::ObjCSelectorExprClass:
4091 case Expr::ObjCStringLiteralClass:
4092 case Expr::ObjCBoxedExprClass:
4093 case Expr::ObjCArrayLiteralClass:
4094 case Expr::ObjCDictionaryLiteralClass:
4095 case Expr::ObjCSubscriptRefExprClass:
4096 case Expr::ObjCIndirectCopyRestoreExprClass:
4097 case Expr::ObjCAvailabilityCheckExprClass:
4098 case Expr::OffsetOfExprClass:
4099 case Expr::PredefinedExprClass:
4100 case Expr::ShuffleVectorExprClass:
4101 case Expr::ConvertVectorExprClass:
4102 case Expr::StmtExprClass:
4103 case Expr::TypeTraitExprClass:
4104 case Expr::RequiresExprClass:
4105 case Expr::ArrayTypeTraitExprClass:
4106 case Expr::ExpressionTraitExprClass:
4107 case Expr::VAArgExprClass:
4108 case Expr::CUDAKernelCallExprClass:
4109 case Expr::AsTypeExprClass:
4110 case Expr::PseudoObjectExprClass:
4111 case Expr::AtomicExprClass:
4112 case Expr::SourceLocExprClass:
4113 case Expr::BuiltinBitCastExprClass:
4114 {
4115 NotPrimaryExpr();
4116 if (!NullOut) {
4117 // As bad as this diagnostic is, it's better than crashing.
4118 DiagnosticsEngine &Diags = Context.getDiags();
4119 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
4120 "cannot yet mangle expression type %0");
4121 Diags.Report(E->getExprLoc(), DiagID)
4122 << E->getStmtClassName() << E->getSourceRange();
4123 return;
4124 }
4125 break;
4126 }
4127
4128 case Expr::CXXUuidofExprClass: {
4129 NotPrimaryExpr();
4130 const CXXUuidofExpr *UE = cast<CXXUuidofExpr>(E);
4131 // As of clang 12, uuidof uses the vendor extended expression
4132 // mangling. Previously, it used a special-cased nonstandard extension.
4133 if (Context.getASTContext().getLangOpts().getClangABICompat() >
4134 LangOptions::ClangABI::Ver11) {
4135 Out << "u8__uuidof";
4136 if (UE->isTypeOperand())
4137 mangleType(UE->getTypeOperand(Context.getASTContext()));
4138 else
4139 mangleTemplateArgExpr(UE->getExprOperand());
4140 Out << 'E';
4141 } else {
4142 if (UE->isTypeOperand()) {
4143 QualType UuidT = UE->getTypeOperand(Context.getASTContext());
4144 Out << "u8__uuidoft";
4145 mangleType(UuidT);
4146 } else {
4147 Expr *UuidExp = UE->getExprOperand();
4148 Out << "u8__uuidofz";
4149 mangleExpression(UuidExp);
4150 }
4151 }
4152 break;
4153 }
4154
4155 // Even gcc-4.5 doesn't mangle this.
4156 case Expr::BinaryConditionalOperatorClass: {
4157 NotPrimaryExpr();
4158 DiagnosticsEngine &Diags = Context.getDiags();
4159 unsigned DiagID =
4160 Diags.getCustomDiagID(DiagnosticsEngine::Error,
4161 "?: operator with omitted middle operand cannot be mangled");
4162 Diags.Report(E->getExprLoc(), DiagID)
4163 << E->getStmtClassName() << E->getSourceRange();
4164 return;
4165 }
4166
4167 // These are used for internal purposes and cannot be meaningfully mangled.
4168 case Expr::OpaqueValueExprClass:
4169 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?")::llvm::llvm_unreachable_internal("cannot mangle opaque value; mangling wrong thing?"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4169)
;
4170
4171 case Expr::InitListExprClass: {
4172 NotPrimaryExpr();
4173 Out << "il";
4174 mangleInitListElements(cast<InitListExpr>(E));
4175 Out << "E";
4176 break;
4177 }
4178
4179 case Expr::DesignatedInitExprClass: {
4180 NotPrimaryExpr();
4181 auto *DIE = cast<DesignatedInitExpr>(E);
4182 for (const auto &Designator : DIE->designators()) {
4183 if (Designator.isFieldDesignator()) {
4184 Out << "di";
4185 mangleSourceName(Designator.getFieldName());
4186 } else if (Designator.isArrayDesignator()) {
4187 Out << "dx";
4188 mangleExpression(DIE->getArrayIndex(Designator));
4189 } else {
4190 assert(Designator.isArrayRangeDesignator() &&((Designator.isArrayRangeDesignator() && "unknown designator kind"
) ? static_cast<void> (0) : __assert_fail ("Designator.isArrayRangeDesignator() && \"unknown designator kind\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4191, __PRETTY_FUNCTION__))
4191 "unknown designator kind")((Designator.isArrayRangeDesignator() && "unknown designator kind"
) ? static_cast<void> (0) : __assert_fail ("Designator.isArrayRangeDesignator() && \"unknown designator kind\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4191, __PRETTY_FUNCTION__))
;
4192 Out << "dX";
4193 mangleExpression(DIE->getArrayRangeStart(Designator));
4194 mangleExpression(DIE->getArrayRangeEnd(Designator));
4195 }
4196 }
4197 mangleExpression(DIE->getInit());
4198 break;
4199 }
4200
4201 case Expr::CXXDefaultArgExprClass:
4202 E = cast<CXXDefaultArgExpr>(E)->getExpr();
4203 goto recurse;
4204
4205 case Expr::CXXDefaultInitExprClass:
4206 E = cast<CXXDefaultInitExpr>(E)->getExpr();
4207 goto recurse;
4208
4209 case Expr::CXXStdInitializerListExprClass:
4210 E = cast<CXXStdInitializerListExpr>(E)->getSubExpr();
4211 goto recurse;
4212
4213 case Expr::SubstNonTypeTemplateParmExprClass:
4214 E = cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement();
4215 goto recurse;
4216
4217 case Expr::UserDefinedLiteralClass:
4218 // We follow g++'s approach of mangling a UDL as a call to the literal
4219 // operator.
4220 case Expr::CXXMemberCallExprClass: // fallthrough
4221 case Expr::CallExprClass: {
4222 NotPrimaryExpr();
4223 const CallExpr *CE = cast<CallExpr>(E);
4224
4225 // <expression> ::= cp <simple-id> <expression>* E
4226 // We use this mangling only when the call would use ADL except
4227 // for being parenthesized. Per discussion with David
4228 // Vandervoorde, 2011.04.25.
4229 if (isParenthesizedADLCallee(CE)) {
4230 Out << "cp";
4231 // The callee here is a parenthesized UnresolvedLookupExpr with
4232 // no qualifier and should always get mangled as a <simple-id>
4233 // anyway.
4234
4235 // <expression> ::= cl <expression>* E
4236 } else {
4237 Out << "cl";
4238 }
4239
4240 unsigned CallArity = CE->getNumArgs();
4241 for (const Expr *Arg : CE->arguments())
4242 if (isa<PackExpansionExpr>(Arg))
4243 CallArity = UnknownArity;
4244
4245 mangleExpression(CE->getCallee(), CallArity);
4246 for (const Expr *Arg : CE->arguments())
4247 mangleExpression(Arg);
4248 Out << 'E';
4249 break;
4250 }
4251
4252 case Expr::CXXNewExprClass: {
4253 NotPrimaryExpr();
4254 const CXXNewExpr *New = cast<CXXNewExpr>(E);
4255 if (New->isGlobalNew()) Out << "gs";
4256 Out << (New->isArray() ? "na" : "nw");
4257 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(),
4258 E = New->placement_arg_end(); I != E; ++I)
4259 mangleExpression(*I);
4260 Out << '_';
4261 mangleType(New->getAllocatedType());
4262 if (New->hasInitializer()) {
4263 if (New->getInitializationStyle() == CXXNewExpr::ListInit)
4264 Out << "il";
4265 else
4266 Out << "pi";
4267 const Expr *Init = New->getInitializer();
4268 if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) {
4269 // Directly inline the initializers.
4270 for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(),
4271 E = CCE->arg_end();
4272 I != E; ++I)
4273 mangleExpression(*I);
4274 } else if (const ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) {
4275 for (unsigned i = 0, e = PLE->getNumExprs(); i != e; ++i)
4276 mangleExpression(PLE->getExpr(i));
4277 } else if (New->getInitializationStyle() == CXXNewExpr::ListInit &&
4278 isa<InitListExpr>(Init)) {
4279 // Only take InitListExprs apart for list-initialization.
4280 mangleInitListElements(cast<InitListExpr>(Init));
4281 } else
4282 mangleExpression(Init);
4283 }
4284 Out << 'E';
4285 break;
4286 }
4287
4288 case Expr::CXXPseudoDestructorExprClass: {
4289 NotPrimaryExpr();
4290 const auto *PDE = cast<CXXPseudoDestructorExpr>(E);
4291 if (const Expr *Base = PDE->getBase())
4292 mangleMemberExprBase(Base, PDE->isArrow());
4293 NestedNameSpecifier *Qualifier = PDE->getQualifier();
4294 if (TypeSourceInfo *ScopeInfo = PDE->getScopeTypeInfo()) {
4295 if (Qualifier) {
4296 mangleUnresolvedPrefix(Qualifier,
4297 /*recursive=*/true);
4298 mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType());
4299 Out << 'E';
4300 } else {
4301 Out << "sr";
4302 if (!mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType()))
4303 Out << 'E';
4304 }
4305 } else if (Qualifier) {
4306 mangleUnresolvedPrefix(Qualifier);
4307 }
4308 // <base-unresolved-name> ::= dn <destructor-name>
4309 Out << "dn";
4310 QualType DestroyedType = PDE->getDestroyedType();
4311 mangleUnresolvedTypeOrSimpleId(DestroyedType);
4312 break;
4313 }
4314
4315 case Expr::MemberExprClass: {
4316 NotPrimaryExpr();
4317 const MemberExpr *ME = cast<MemberExpr>(E);
4318 mangleMemberExpr(ME->getBase(), ME->isArrow(),
4319 ME->getQualifier(), nullptr,
4320 ME->getMemberDecl()->getDeclName(),
4321 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4322 Arity);
4323 break;
4324 }
4325
4326 case Expr::UnresolvedMemberExprClass: {
4327 NotPrimaryExpr();
4328 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E);
4329 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
4330 ME->isArrow(), ME->getQualifier(), nullptr,
4331 ME->getMemberName(),
4332 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4333 Arity);
4334 break;
4335 }
4336
4337 case Expr::CXXDependentScopeMemberExprClass: {
4338 NotPrimaryExpr();
4339 const CXXDependentScopeMemberExpr *ME
4340 = cast<CXXDependentScopeMemberExpr>(E);
4341 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
4342 ME->isArrow(), ME->getQualifier(),
4343 ME->getFirstQualifierFoundInScope(),
4344 ME->getMember(),
4345 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4346 Arity);
4347 break;
4348 }
4349
4350 case Expr::UnresolvedLookupExprClass: {
4351 NotPrimaryExpr();
4352 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E);
4353 mangleUnresolvedName(ULE->getQualifier(), ULE->getName(),
4354 ULE->getTemplateArgs(), ULE->getNumTemplateArgs(),
4355 Arity);
4356 break;
4357 }
4358
4359 case Expr::CXXUnresolvedConstructExprClass: {
4360 NotPrimaryExpr();
4361 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E);
4362 unsigned N = CE->getNumArgs();
4363
4364 if (CE->isListInitialization()) {
4365 assert(N == 1 && "unexpected form for list initialization")((N == 1 && "unexpected form for list initialization"
) ? static_cast<void> (0) : __assert_fail ("N == 1 && \"unexpected form for list initialization\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4365, __PRETTY_FUNCTION__))
;
4366 auto *IL = cast<InitListExpr>(CE->getArg(0));
4367 Out << "tl";
4368 mangleType(CE->getType());
4369 mangleInitListElements(IL);
4370 Out << "E";
4371 break;
4372 }
4373
4374 Out << "cv";
4375 mangleType(CE->getType());
4376 if (N != 1) Out << '_';
4377 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I));
4378 if (N != 1) Out << 'E';
4379 break;
4380 }
4381
4382 case Expr::CXXConstructExprClass: {
4383 // An implicit cast is silent, thus may contain <expr-primary>.
4384 const auto *CE = cast<CXXConstructExpr>(E);
4385 if (!CE->isListInitialization() || CE->isStdInitListInitialization()) {
4386 assert(((CE->getNumArgs() >= 1 && (CE->getNumArgs()
== 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&
"implicit CXXConstructExpr must have one argument") ? static_cast
<void> (0) : __assert_fail ("CE->getNumArgs() >= 1 && (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) && \"implicit CXXConstructExpr must have one argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4389, __PRETTY_FUNCTION__))
4387 CE->getNumArgs() >= 1 &&((CE->getNumArgs() >= 1 && (CE->getNumArgs()
== 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&
"implicit CXXConstructExpr must have one argument") ? static_cast
<void> (0) : __assert_fail ("CE->getNumArgs() >= 1 && (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) && \"implicit CXXConstructExpr must have one argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4389, __PRETTY_FUNCTION__))
4388 (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&((CE->getNumArgs() >= 1 && (CE->getNumArgs()
== 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&
"implicit CXXConstructExpr must have one argument") ? static_cast
<void> (0) : __assert_fail ("CE->getNumArgs() >= 1 && (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) && \"implicit CXXConstructExpr must have one argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4389, __PRETTY_FUNCTION__))
4389 "implicit CXXConstructExpr must have one argument")((CE->getNumArgs() >= 1 && (CE->getNumArgs()
== 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) &&
"implicit CXXConstructExpr must have one argument") ? static_cast
<void> (0) : __assert_fail ("CE->getNumArgs() >= 1 && (CE->getNumArgs() == 1 || isa<CXXDefaultArgExpr>(CE->getArg(1))) && \"implicit CXXConstructExpr must have one argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4389, __PRETTY_FUNCTION__))
;
4390 E = cast<CXXConstructExpr>(E)->getArg(0);
4391 goto recurse;
4392 }
4393 NotPrimaryExpr();
4394 Out << "il";
4395 for (auto *E : CE->arguments())
4396 mangleExpression(E);
4397 Out << "E";
4398 break;
4399 }
4400
4401 case Expr::CXXTemporaryObjectExprClass: {
4402 NotPrimaryExpr();
4403 const auto *CE = cast<CXXTemporaryObjectExpr>(E);
4404 unsigned N = CE->getNumArgs();
4405 bool List = CE->isListInitialization();
4406
4407 if (List)
4408 Out << "tl";
4409 else
4410 Out << "cv";
4411 mangleType(CE->getType());
4412 if (!List && N != 1)
4413 Out << '_';
4414 if (CE->isStdInitListInitialization()) {
4415 // We implicitly created a std::initializer_list<T> for the first argument
4416 // of a constructor of type U in an expression of the form U{a, b, c}.
4417 // Strip all the semantic gunk off the initializer list.
4418 auto *SILE =
4419 cast<CXXStdInitializerListExpr>(CE->getArg(0)->IgnoreImplicit());
4420 auto *ILE = cast<InitListExpr>(SILE->getSubExpr()->IgnoreImplicit());
4421 mangleInitListElements(ILE);
4422 } else {
4423 for (auto *E : CE->arguments())
4424 mangleExpression(E);
4425 }
4426 if (List || N != 1)
4427 Out << 'E';
4428 break;
4429 }
4430
4431 case Expr::CXXScalarValueInitExprClass:
4432 NotPrimaryExpr();
4433 Out << "cv";
4434 mangleType(E->getType());
4435 Out << "_E";
4436 break;
4437
4438 case Expr::CXXNoexceptExprClass:
4439 NotPrimaryExpr();
4440 Out << "nx";
4441 mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand());
4442 break;
4443
4444 case Expr::UnaryExprOrTypeTraitExprClass: {
4445 // Non-instantiation-dependent traits are an <expr-primary> integer literal.
4446 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E);
4447
4448 if (!SAE->isInstantiationDependent()) {
4449 // Itanium C++ ABI:
4450 // If the operand of a sizeof or alignof operator is not
4451 // instantiation-dependent it is encoded as an integer literal
4452 // reflecting the result of the operator.
4453 //
4454 // If the result of the operator is implicitly converted to a known
4455 // integer type, that type is used for the literal; otherwise, the type
4456 // of std::size_t or std::ptrdiff_t is used.
4457 QualType T = (ImplicitlyConvertedToType.isNull() ||
4458 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType()
4459 : ImplicitlyConvertedToType;
4460 llvm::APSInt V = SAE->EvaluateKnownConstInt(Context.getASTContext());
4461 mangleIntegerLiteral(T, V);
4462 break;
4463 }
4464
4465 NotPrimaryExpr(); // But otherwise, they are not.
4466
4467 auto MangleAlignofSizeofArg = [&] {
4468 if (SAE->isArgumentType()) {
4469 Out << 't';
4470 mangleType(SAE->getArgumentType());
4471 } else {
4472 Out << 'z';
4473 mangleExpression(SAE->getArgumentExpr());
4474 }
4475 };
4476
4477 switch(SAE->getKind()) {
4478 case UETT_SizeOf:
4479 Out << 's';
4480 MangleAlignofSizeofArg();
4481 break;
4482 case UETT_PreferredAlignOf:
4483 // As of clang 12, we mangle __alignof__ differently than alignof. (They
4484 // have acted differently since Clang 8, but were previously mangled the
4485 // same.)
4486 if (Context.getASTContext().getLangOpts().getClangABICompat() >
4487 LangOptions::ClangABI::Ver11) {
4488 Out << "u11__alignof__";
4489 if (SAE->isArgumentType())
4490 mangleType(SAE->getArgumentType());
4491 else
4492 mangleTemplateArgExpr(SAE->getArgumentExpr());
4493 Out << 'E';
4494 break;
4495 }
4496 LLVM_FALLTHROUGH[[gnu::fallthrough]];
4497 case UETT_AlignOf:
4498 Out << 'a';
4499 MangleAlignofSizeofArg();
4500 break;
4501 case UETT_VecStep: {
4502 DiagnosticsEngine &Diags = Context.getDiags();
4503 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
4504 "cannot yet mangle vec_step expression");
4505 Diags.Report(DiagID);
4506 return;
4507 }
4508 case UETT_OpenMPRequiredSimdAlign: {
4509 DiagnosticsEngine &Diags = Context.getDiags();
4510 unsigned DiagID = Diags.getCustomDiagID(
4511 DiagnosticsEngine::Error,
4512 "cannot yet mangle __builtin_omp_required_simd_align expression");
4513 Diags.Report(DiagID);
4514 return;
4515 }
4516 }
4517 break;
4518 }
4519
4520 case Expr::CXXThrowExprClass: {
4521 NotPrimaryExpr();
4522 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E);
4523 // <expression> ::= tw <expression> # throw expression
4524 // ::= tr # rethrow
4525 if (TE->getSubExpr()) {
4526 Out << "tw";
4527 mangleExpression(TE->getSubExpr());
4528 } else {
4529 Out << "tr";
4530 }
4531 break;
4532 }
4533
4534 case Expr::CXXTypeidExprClass: {
4535 NotPrimaryExpr();
4536 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E);
4537 // <expression> ::= ti <type> # typeid (type)
4538 // ::= te <expression> # typeid (expression)
4539 if (TIE->isTypeOperand()) {
4540 Out << "ti";
4541 mangleType(TIE->getTypeOperand(Context.getASTContext()));
4542 } else {
4543 Out << "te";
4544 mangleExpression(TIE->getExprOperand());
4545 }
4546 break;
4547 }
4548
4549 case Expr::CXXDeleteExprClass: {
4550 NotPrimaryExpr();
4551 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E);
4552 // <expression> ::= [gs] dl <expression> # [::] delete expr
4553 // ::= [gs] da <expression> # [::] delete [] expr
4554 if (DE->isGlobalDelete()) Out << "gs";
4555 Out << (DE->isArrayForm() ? "da" : "dl");
4556 mangleExpression(DE->getArgument());
4557 break;
4558 }
4559
4560 case Expr::UnaryOperatorClass: {
4561 NotPrimaryExpr();
4562 const UnaryOperator *UO = cast<UnaryOperator>(E);
4563 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()),
4564 /*Arity=*/1);
4565 mangleExpression(UO->getSubExpr());
4566 break;
4567 }
4568
4569 case Expr::ArraySubscriptExprClass: {
4570 NotPrimaryExpr();
4571 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E);
4572
4573 // Array subscript is treated as a syntactically weird form of
4574 // binary operator.
4575 Out << "ix";
4576 mangleExpression(AE->getLHS());
4577 mangleExpression(AE->getRHS());
4578 break;
4579 }
4580
4581 case Expr::MatrixSubscriptExprClass: {
4582 NotPrimaryExpr();
4583 const MatrixSubscriptExpr *ME = cast<MatrixSubscriptExpr>(E);
4584 Out << "ixix";
4585 mangleExpression(ME->getBase());
4586 mangleExpression(ME->getRowIdx());
4587 mangleExpression(ME->getColumnIdx());
4588 break;
4589 }
4590
4591 case Expr::CompoundAssignOperatorClass: // fallthrough
4592 case Expr::BinaryOperatorClass: {
4593 NotPrimaryExpr();
4594 const BinaryOperator *BO = cast<BinaryOperator>(E);
4595 if (BO->getOpcode() == BO_PtrMemD)
4596 Out << "ds";
4597 else
4598 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()),
4599 /*Arity=*/2);
4600 mangleExpression(BO->getLHS());
4601 mangleExpression(BO->getRHS());
4602 break;
4603 }
4604
4605 case Expr::CXXRewrittenBinaryOperatorClass: {
4606 NotPrimaryExpr();
4607 // The mangled form represents the original syntax.
4608 CXXRewrittenBinaryOperator::DecomposedForm Decomposed =
4609 cast<CXXRewrittenBinaryOperator>(E)->getDecomposedForm();
4610 mangleOperatorName(BinaryOperator::getOverloadedOperator(Decomposed.Opcode),
4611 /*Arity=*/2);
4612 mangleExpression(Decomposed.LHS);
4613 mangleExpression(Decomposed.RHS);
4614 break;
4615 }
4616
4617 case Expr::ConditionalOperatorClass: {
4618 NotPrimaryExpr();
4619 const ConditionalOperator *CO = cast<ConditionalOperator>(E);
4620 mangleOperatorName(OO_Conditional, /*Arity=*/3);
4621 mangleExpression(CO->getCond());
4622 mangleExpression(CO->getLHS(), Arity);
4623 mangleExpression(CO->getRHS(), Arity);
4624 break;
4625 }
4626
4627 case Expr::ImplicitCastExprClass: {
4628 ImplicitlyConvertedToType = E->getType();
4629 E = cast<ImplicitCastExpr>(E)->getSubExpr();
4630 goto recurse;
4631 }
4632
4633 case Expr::ObjCBridgedCastExprClass: {
4634 NotPrimaryExpr();
4635 // Mangle ownership casts as a vendor extended operator __bridge,
4636 // __bridge_transfer, or __bridge_retain.
4637 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName();
4638 Out << "v1U" << Kind.size() << Kind;
4639 mangleCastExpression(E, "cv");
4640 break;
4641 }
4642
4643 case Expr::CStyleCastExprClass:
4644 NotPrimaryExpr();
4645 mangleCastExpression(E, "cv");
4646 break;
4647
4648 case Expr::CXXFunctionalCastExprClass: {
4649 NotPrimaryExpr();
4650 auto *Sub = cast<ExplicitCastExpr>(E)->getSubExpr()->IgnoreImplicit();
4651 // FIXME: Add isImplicit to CXXConstructExpr.
4652 if (auto *CCE = dyn_cast<CXXConstructExpr>(Sub))
4653 if (CCE->getParenOrBraceRange().isInvalid())
4654 Sub = CCE->getArg(0)->IgnoreImplicit();
4655 if (auto *StdInitList = dyn_cast<CXXStdInitializerListExpr>(Sub))
4656 Sub = StdInitList->getSubExpr()->IgnoreImplicit();
4657 if (auto *IL = dyn_cast<InitListExpr>(Sub)) {
4658 Out << "tl";
4659 mangleType(E->getType());
4660 mangleInitListElements(IL);
4661 Out << "E";
4662 } else {
4663 mangleCastExpression(E, "cv");
4664 }
4665 break;
4666 }
4667
4668 case Expr::CXXStaticCastExprClass:
4669 NotPrimaryExpr();
4670 mangleCastExpression(E, "sc");
4671 break;
4672 case Expr::CXXDynamicCastExprClass:
4673 NotPrimaryExpr();
4674 mangleCastExpression(E, "dc");
4675 break;
4676 case Expr::CXXReinterpretCastExprClass:
4677 NotPrimaryExpr();
4678 mangleCastExpression(E, "rc");
4679 break;
4680 case Expr::CXXConstCastExprClass:
4681 NotPrimaryExpr();
4682 mangleCastExpression(E, "cc");
4683 break;
4684 case Expr::CXXAddrspaceCastExprClass:
4685 NotPrimaryExpr();
4686 mangleCastExpression(E, "ac");
4687 break;
4688
4689 case Expr::CXXOperatorCallExprClass: {
4690 NotPrimaryExpr();
4691 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E);
4692 unsigned NumArgs = CE->getNumArgs();
4693 // A CXXOperatorCallExpr for OO_Arrow models only semantics, not syntax
4694 // (the enclosing MemberExpr covers the syntactic portion).
4695 if (CE->getOperator() != OO_Arrow)
4696 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs);
4697 // Mangle the arguments.
4698 for (unsigned i = 0; i != NumArgs; ++i)
4699 mangleExpression(CE->getArg(i));
4700 break;
4701 }
4702
4703 case Expr::ParenExprClass:
4704 E = cast<ParenExpr>(E)->getSubExpr();
4705 goto recurse;
4706
4707 case Expr::ConceptSpecializationExprClass: {
4708 // <expr-primary> ::= L <mangled-name> E # external name
4709 Out << "L_Z";
4710 auto *CSE = cast<ConceptSpecializationExpr>(E);
4711 mangleTemplateName(CSE->getNamedConcept(),
4712 CSE->getTemplateArguments().data(),
4713 CSE->getTemplateArguments().size());
4714 Out << 'E';
4715 break;
4716 }
4717
4718 case Expr::DeclRefExprClass:
4719 // MangleDeclRefExpr helper handles primary-vs-nonprimary
4720 MangleDeclRefExpr(cast<DeclRefExpr>(E)->getDecl());
4721 break;
4722
4723 case Expr::SubstNonTypeTemplateParmPackExprClass:
4724 NotPrimaryExpr();
4725 // FIXME: not clear how to mangle this!
4726 // template <unsigned N...> class A {
4727 // template <class U...> void foo(U (&x)[N]...);
4728 // };
4729 Out << "_SUBSTPACK_";
4730 break;
4731
4732 case Expr::FunctionParmPackExprClass: {
4733 NotPrimaryExpr();
4734 // FIXME: not clear how to mangle this!
4735 const FunctionParmPackExpr *FPPE = cast<FunctionParmPackExpr>(E);
4736 Out << "v110_SUBSTPACK";
4737 MangleDeclRefExpr(FPPE->getParameterPack());
4738 break;
4739 }
4740
4741 case Expr::DependentScopeDeclRefExprClass: {
4742 NotPrimaryExpr();
4743 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E);
4744 mangleUnresolvedName(DRE->getQualifier(), DRE->getDeclName(),
4745 DRE->getTemplateArgs(), DRE->getNumTemplateArgs(),
4746 Arity);
4747 break;
4748 }
4749
4750 case Expr::CXXBindTemporaryExprClass:
4751 E = cast<CXXBindTemporaryExpr>(E)->getSubExpr();
4752 goto recurse;
4753
4754 case Expr::ExprWithCleanupsClass:
4755 E = cast<ExprWithCleanups>(E)->getSubExpr();
4756 goto recurse;
4757
4758 case Expr::FloatingLiteralClass: {
4759 // <expr-primary>
4760 const FloatingLiteral *FL = cast<FloatingLiteral>(E);
4761 mangleFloatLiteral(FL->getType(), FL->getValue());
4762 break;
4763 }
4764
4765 case Expr::FixedPointLiteralClass:
4766 // Currently unimplemented -- might be <expr-primary> in future?
4767 mangleFixedPointLiteral();
4768 break;
4769
4770 case Expr::CharacterLiteralClass:
4771 // <expr-primary>
4772 Out << 'L';
4773 mangleType(E->getType());
4774 Out << cast<CharacterLiteral>(E)->getValue();
4775 Out << 'E';
4776 break;
4777
4778 // FIXME. __objc_yes/__objc_no are mangled same as true/false
4779 case Expr::ObjCBoolLiteralExprClass:
4780 // <expr-primary>
4781 Out << "Lb";
4782 Out << (cast<ObjCBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4783 Out << 'E';
4784 break;
4785
4786 case Expr::CXXBoolLiteralExprClass:
4787 // <expr-primary>
4788 Out << "Lb";
4789 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4790 Out << 'E';
4791 break;
4792
4793 case Expr::IntegerLiteralClass: {
4794 // <expr-primary>
4795 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue());
4796 if (E->getType()->isSignedIntegerType())
4797 Value.setIsSigned(true);
4798 mangleIntegerLiteral(E->getType(), Value);
4799 break;
4800 }
4801
4802 case Expr::ImaginaryLiteralClass: {
4803 // <expr-primary>
4804 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E);
4805 // Mangle as if a complex literal.
4806 // Proposal from David Vandevoorde, 2010.06.30.
4807 Out << 'L';
4808 mangleType(E->getType());
4809 if (const FloatingLiteral *Imag =
4810 dyn_cast<FloatingLiteral>(IE->getSubExpr())) {
4811 // Mangle a floating-point zero of the appropriate type.
4812 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics()));
4813 Out << '_';
4814 mangleFloat(Imag->getValue());
4815 } else {
4816 Out << "0_";
4817 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue());
4818 if (IE->getSubExpr()->getType()->isSignedIntegerType())
4819 Value.setIsSigned(true);
4820 mangleNumber(Value);
4821 }
4822 Out << 'E';
4823 break;
4824 }
4825
4826 case Expr::StringLiteralClass: {
4827 // <expr-primary>
4828 // Revised proposal from David Vandervoorde, 2010.07.15.
4829 Out << 'L';
4830 assert(isa<ConstantArrayType>(E->getType()))((isa<ConstantArrayType>(E->getType())) ? static_cast
<void> (0) : __assert_fail ("isa<ConstantArrayType>(E->getType())"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4830, __PRETTY_FUNCTION__))
;
4831 mangleType(E->getType());
4832 Out << 'E';
4833 break;
4834 }
4835
4836 case Expr::GNUNullExprClass:
4837 // <expr-primary>
4838 // Mangle as if an integer literal 0.
4839 mangleIntegerLiteral(E->getType(), llvm::APSInt(32));
4840 break;
4841
4842 case Expr::CXXNullPtrLiteralExprClass: {
4843 // <expr-primary>
4844 Out << "LDnE";
4845 break;
4846 }
4847
4848 case Expr::PackExpansionExprClass:
4849 NotPrimaryExpr();
4850 Out << "sp";
4851 mangleExpression(cast<PackExpansionExpr>(E)->getPattern());
4852 break;
4853
4854 case Expr::SizeOfPackExprClass: {
4855 NotPrimaryExpr();
4856 auto *SPE = cast<SizeOfPackExpr>(E);
4857 if (SPE->isPartiallySubstituted()) {
4858 Out << "sP";
4859 for (const auto &A : SPE->getPartialArguments())
4860 mangleTemplateArg(A, false);
4861 Out << "E";
4862 break;
4863 }
4864
4865 Out << "sZ";
4866 const NamedDecl *Pack = SPE->getPack();
4867 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack))
4868 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
4869 else if (const NonTypeTemplateParmDecl *NTTP
4870 = dyn_cast<NonTypeTemplateParmDecl>(Pack))
4871 mangleTemplateParameter(NTTP->getDepth(), NTTP->getIndex());
4872 else if (const TemplateTemplateParmDecl *TempTP
4873 = dyn_cast<TemplateTemplateParmDecl>(Pack))
4874 mangleTemplateParameter(TempTP->getDepth(), TempTP->getIndex());
4875 else
4876 mangleFunctionParam(cast<ParmVarDecl>(Pack));
4877 break;
4878 }
4879
4880 case Expr::MaterializeTemporaryExprClass:
4881 E = cast<MaterializeTemporaryExpr>(E)->getSubExpr();
4882 goto recurse;
4883
4884 case Expr::CXXFoldExprClass: {
4885 NotPrimaryExpr();
4886 auto *FE = cast<CXXFoldExpr>(E);
4887 if (FE->isLeftFold())
4888 Out << (FE->getInit() ? "fL" : "fl");
4889 else
4890 Out << (FE->getInit() ? "fR" : "fr");
4891
4892 if (FE->getOperator() == BO_PtrMemD)
4893 Out << "ds";
4894 else
4895 mangleOperatorName(
4896 BinaryOperator::getOverloadedOperator(FE->getOperator()),
4897 /*Arity=*/2);
4898
4899 if (FE->getLHS())
4900 mangleExpression(FE->getLHS());
4901 if (FE->getRHS())
4902 mangleExpression(FE->getRHS());
4903 break;
4904 }
4905
4906 case Expr::CXXThisExprClass:
4907 NotPrimaryExpr();
4908 Out << "fpT";
4909 break;
4910
4911 case Expr::CoawaitExprClass:
4912 // FIXME: Propose a non-vendor mangling.
4913 NotPrimaryExpr();
4914 Out << "v18co_await";
4915 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4916 break;
4917
4918 case Expr::DependentCoawaitExprClass:
4919 // FIXME: Propose a non-vendor mangling.
4920 NotPrimaryExpr();
4921 Out << "v18co_await";
4922 mangleExpression(cast<DependentCoawaitExpr>(E)->getOperand());
4923 break;
4924
4925 case Expr::CoyieldExprClass:
4926 // FIXME: Propose a non-vendor mangling.
4927 NotPrimaryExpr();
4928 Out << "v18co_yield";
4929 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4930 break;
4931 }
4932
4933 if (AsTemplateArg && !IsPrimaryExpr)
4934 Out << 'E';
4935}
4936
4937/// Mangle an expression which refers to a parameter variable.
4938///
4939/// <expression> ::= <function-param>
4940/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0
4941/// <function-param> ::= fp <top-level CV-qualifiers>
4942/// <parameter-2 non-negative number> _ # L == 0, I > 0
4943/// <function-param> ::= fL <L-1 non-negative number>
4944/// p <top-level CV-qualifiers> _ # L > 0, I == 0
4945/// <function-param> ::= fL <L-1 non-negative number>
4946/// p <top-level CV-qualifiers>
4947/// <I-1 non-negative number> _ # L > 0, I > 0
4948///
4949/// L is the nesting depth of the parameter, defined as 1 if the
4950/// parameter comes from the innermost function prototype scope
4951/// enclosing the current context, 2 if from the next enclosing
4952/// function prototype scope, and so on, with one special case: if
4953/// we've processed the full parameter clause for the innermost
4954/// function type, then L is one less. This definition conveniently
4955/// makes it irrelevant whether a function's result type was written
4956/// trailing or leading, but is otherwise overly complicated; the
4957/// numbering was first designed without considering references to
4958/// parameter in locations other than return types, and then the
4959/// mangling had to be generalized without changing the existing
4960/// manglings.
4961///
4962/// I is the zero-based index of the parameter within its parameter
4963/// declaration clause. Note that the original ABI document describes
4964/// this using 1-based ordinals.
4965void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) {
4966 unsigned parmDepth = parm->getFunctionScopeDepth();
4967 unsigned parmIndex = parm->getFunctionScopeIndex();
4968
4969 // Compute 'L'.
4970 // parmDepth does not include the declaring function prototype.
4971 // FunctionTypeDepth does account for that.
4972 assert(parmDepth < FunctionTypeDepth.getDepth())((parmDepth < FunctionTypeDepth.getDepth()) ? static_cast<
void> (0) : __assert_fail ("parmDepth < FunctionTypeDepth.getDepth()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4972, __PRETTY_FUNCTION__))
;
4973 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth;
4974 if (FunctionTypeDepth.isInResultType())
4975 nestingDepth--;
4976
4977 if (nestingDepth == 0) {
4978 Out << "fp";
4979 } else {
4980 Out << "fL" << (nestingDepth - 1) << 'p';
4981 }
4982
4983 // Top-level qualifiers. We don't have to worry about arrays here,
4984 // because parameters declared as arrays should already have been
4985 // transformed to have pointer type. FIXME: apparently these don't
4986 // get mangled if used as an rvalue of a known non-class type?
4987 assert(!parm->getType()->isArrayType()((!parm->getType()->isArrayType() && "parameter's type is still an array type?"
) ? static_cast<void> (0) : __assert_fail ("!parm->getType()->isArrayType() && \"parameter's type is still an array type?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4988, __PRETTY_FUNCTION__))
4988 && "parameter's type is still an array type?")((!parm->getType()->isArrayType() && "parameter's type is still an array type?"
) ? static_cast<void> (0) : __assert_fail ("!parm->getType()->isArrayType() && \"parameter's type is still an array type?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 4988, __PRETTY_FUNCTION__))
;
4989
4990 if (const DependentAddressSpaceType *DAST =
4991 dyn_cast<DependentAddressSpaceType>(parm->getType())) {
4992 mangleQualifiers(DAST->getPointeeType().getQualifiers(), DAST);
4993 } else {
4994 mangleQualifiers(parm->getType().getQualifiers());
4995 }
4996
4997 // Parameter index.
4998 if (parmIndex != 0) {
4999 Out << (parmIndex - 1);
5000 }
5001 Out << '_';
5002}
5003
5004void CXXNameMangler::mangleCXXCtorType(CXXCtorType T,
5005 const CXXRecordDecl *InheritedFrom) {
5006 // <ctor-dtor-name> ::= C1 # complete object constructor
5007 // ::= C2 # base object constructor
5008 // ::= CI1 <type> # complete inheriting constructor
5009 // ::= CI2 <type> # base inheriting constructor
5010 //
5011 // In addition, C5 is a comdat name with C1 and C2 in it.
5012 Out << 'C';
5013 if (InheritedFrom)
5014 Out << 'I';
5015 switch (T) {
5016 case Ctor_Complete:
5017 Out << '1';
5018 break;
5019 case Ctor_Base:
5020 Out << '2';
5021 break;
5022 case Ctor_Comdat:
5023 Out << '5';
5024 break;
5025 case Ctor_DefaultClosure:
5026 case Ctor_CopyingClosure:
5027 llvm_unreachable("closure constructors don't exist for the Itanium ABI!")::llvm::llvm_unreachable_internal("closure constructors don't exist for the Itanium ABI!"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5027)
;
5028 }
5029 if (InheritedFrom)
5030 mangleName(InheritedFrom);
5031}
5032
5033void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
5034 // <ctor-dtor-name> ::= D0 # deleting destructor
5035 // ::= D1 # complete object destructor
5036 // ::= D2 # base object destructor
5037 //
5038 // In addition, D5 is a comdat name with D1, D2 and, if virtual, D0 in it.
5039 switch (T) {
5040 case Dtor_Deleting:
5041 Out << "D0";
5042 break;
5043 case Dtor_Complete:
5044 Out << "D1";
5045 break;
5046 case Dtor_Base:
5047 Out << "D2";
5048 break;
5049 case Dtor_Comdat:
5050 Out << "D5";
5051 break;
5052 }
5053}
5054
5055namespace {
5056// Helper to provide ancillary information on a template used to mangle its
5057// arguments.
5058struct TemplateArgManglingInfo {
5059 TemplateDecl *ResolvedTemplate = nullptr;
5060 bool SeenPackExpansionIntoNonPack = false;
5061 const NamedDecl *UnresolvedExpandedPack = nullptr;
5062
5063 TemplateArgManglingInfo(TemplateName TN) {
5064 if (TemplateDecl *TD = TN.getAsTemplateDecl())
5065 ResolvedTemplate = TD;
5066 }
5067
5068 /// Do we need to mangle template arguments with exactly correct types?
5069 ///
5070 /// This should be called exactly once for each parameter / argument pair, in
5071 /// order.
5072 bool needExactType(unsigned ParamIdx, const TemplateArgument &Arg) {
5073 // We need correct types when the template-name is unresolved or when it
5074 // names a template that is able to be overloaded.
5075 if (!ResolvedTemplate || SeenPackExpansionIntoNonPack)
5076 return true;
5077
5078 // Move to the next parameter.
5079 const NamedDecl *Param = UnresolvedExpandedPack;
5080 if (!Param) {
5081 assert(ParamIdx < ResolvedTemplate->getTemplateParameters()->size() &&((ParamIdx < ResolvedTemplate->getTemplateParameters()->
size() && "no parameter for argument") ? static_cast<
void> (0) : __assert_fail ("ParamIdx < ResolvedTemplate->getTemplateParameters()->size() && \"no parameter for argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5082, __PRETTY_FUNCTION__))
5082 "no parameter for argument")((ParamIdx < ResolvedTemplate->getTemplateParameters()->
size() && "no parameter for argument") ? static_cast<
void> (0) : __assert_fail ("ParamIdx < ResolvedTemplate->getTemplateParameters()->size() && \"no parameter for argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5082, __PRETTY_FUNCTION__))
;
5083 Param = ResolvedTemplate->getTemplateParameters()->getParam(ParamIdx);
5084
5085 // If we reach an expanded parameter pack whose argument isn't in pack
5086 // form, that means Sema couldn't figure out which arguments belonged to
5087 // it, because it contains a pack expansion. Track the expanded pack for
5088 // all further template arguments until we hit that pack expansion.
5089 if (Param->isParameterPack() && Arg.getKind() != TemplateArgument::Pack) {
5090 assert(getExpandedPackSize(Param) &&((getExpandedPackSize(Param) && "failed to form pack argument for parameter pack"
) ? static_cast<void> (0) : __assert_fail ("getExpandedPackSize(Param) && \"failed to form pack argument for parameter pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5091, __PRETTY_FUNCTION__))
5091 "failed to form pack argument for parameter pack")((getExpandedPackSize(Param) && "failed to form pack argument for parameter pack"
) ? static_cast<void> (0) : __assert_fail ("getExpandedPackSize(Param) && \"failed to form pack argument for parameter pack\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5091, __PRETTY_FUNCTION__))
;
5092 UnresolvedExpandedPack = Param;
5093 }
5094 }
5095
5096 // If we encounter a pack argument that is expanded into a non-pack
5097 // parameter, we can no longer track parameter / argument correspondence,
5098 // and need to use exact types from this point onwards.
5099 if (Arg.isPackExpansion() &&
5100 (!Param->isParameterPack() || UnresolvedExpandedPack)) {
5101 SeenPackExpansionIntoNonPack = true;
5102 return true;
5103 }
5104
5105 // We need exact types for function template arguments because they might be
5106 // overloaded on template parameter type. As a special case, a member
5107 // function template of a generic lambda is not overloadable.
5108 if (auto *FTD = dyn_cast<FunctionTemplateDecl>(ResolvedTemplate)) {
5109 auto *RD = dyn_cast<CXXRecordDecl>(FTD->getDeclContext());
5110 if (!RD || !RD->isGenericLambda())
5111 return true;
5112 }
5113
5114 // Otherwise, we only need a correct type if the parameter has a deduced
5115 // type.
5116 //
5117 // Note: for an expanded parameter pack, getType() returns the type prior
5118 // to expansion. We could ask for the expanded type with getExpansionType(),
5119 // but it doesn't matter because substitution and expansion don't affect
5120 // whether a deduced type appears in the type.
5121 auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param);
5122 return NTTP && NTTP->getType()->getContainedDeducedType();
5123 }
5124};
5125}
5126
5127void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
5128 const TemplateArgumentLoc *TemplateArgs,
5129 unsigned NumTemplateArgs) {
5130 // <template-args> ::= I <template-arg>+ E
5131 Out << 'I';
5132 TemplateArgManglingInfo Info(TN);
5133 for (unsigned i = 0; i != NumTemplateArgs; ++i)
5134 mangleTemplateArg(TemplateArgs[i].getArgument(),
5135 Info.needExactType(i, TemplateArgs[i].getArgument()));
5136 Out << 'E';
5137}
5138
5139void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
5140 const TemplateArgumentList &AL) {
5141 // <template-args> ::= I <template-arg>+ E
5142 Out << 'I';
5143 TemplateArgManglingInfo Info(TN);
5144 for (unsigned i = 0, e = AL.size(); i != e; ++i)
5145 mangleTemplateArg(AL[i], Info.needExactType(i, AL[i]));
5146 Out << 'E';
5147}
5148
5149void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
5150 const TemplateArgument *TemplateArgs,
5151 unsigned NumTemplateArgs) {
5152 // <template-args> ::= I <template-arg>+ E
5153 Out << 'I';
5154 TemplateArgManglingInfo Info(TN);
5155 for (unsigned i = 0; i != NumTemplateArgs; ++i)
5156 mangleTemplateArg(TemplateArgs[i], Info.needExactType(i, TemplateArgs[i]));
5157 Out << 'E';
5158}
5159
5160void CXXNameMangler::mangleTemplateArg(TemplateArgument A, bool NeedExactType) {
5161 // <template-arg> ::= <type> # type or template
5162 // ::= X <expression> E # expression
5163 // ::= <expr-primary> # simple expressions
5164 // ::= J <template-arg>* E # argument pack
5165 if (!A.isInstantiationDependent() || A.isDependent())
5166 A = Context.getASTContext().getCanonicalTemplateArgument(A);
5167
5168 switch (A.getKind()) {
5169 case TemplateArgument::Null:
5170 llvm_unreachable("Cannot mangle NULL template argument")::llvm::llvm_unreachable_internal("Cannot mangle NULL template argument"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5170)
;
5171
5172 case TemplateArgument::Type:
5173 mangleType(A.getAsType());
5174 break;
5175 case TemplateArgument::Template:
5176 // This is mangled as <type>.
5177 mangleType(A.getAsTemplate());
5178 break;
5179 case TemplateArgument::TemplateExpansion:
5180 // <type> ::= Dp <type> # pack expansion (C++0x)
5181 Out << "Dp";
5182 mangleType(A.getAsTemplateOrTemplatePattern());
5183 break;
5184 case TemplateArgument::Expression:
5185 mangleTemplateArgExpr(A.getAsExpr());
5186 break;
5187 case TemplateArgument::Integral:
5188 mangleIntegerLiteral(A.getIntegralType(), A.getAsIntegral());
5189 break;
5190 case TemplateArgument::Declaration: {
5191 // <expr-primary> ::= L <mangled-name> E # external name
5192 ValueDecl *D = A.getAsDecl();
5193
5194 // Template parameter objects are modeled by reproducing a source form
5195 // produced as if by aggregate initialization.
5196 if (A.getParamTypeForDecl()->isRecordType()) {
5197 auto *TPO = cast<TemplateParamObjectDecl>(D);
5198 mangleValueInTemplateArg(TPO->getType().getUnqualifiedType(),
5199 TPO->getValue(), /*TopLevel=*/true,
5200 NeedExactType);
5201 break;
5202 }
5203
5204 ASTContext &Ctx = Context.getASTContext();
5205 APValue Value;
5206 if (D->isCXXInstanceMember())
5207 // Simple pointer-to-member with no conversion.
5208 Value = APValue(D, /*IsDerivedMember=*/false, /*Path=*/{});
5209 else if (D->getType()->isArrayType() &&
5210 Ctx.hasSimilarType(Ctx.getDecayedType(D->getType()),
5211 A.getParamTypeForDecl()) &&
5212 Ctx.getLangOpts().getClangABICompat() >
5213 LangOptions::ClangABI::Ver11)
5214 // Build a value corresponding to this implicit array-to-pointer decay.
5215 Value = APValue(APValue::LValueBase(D), CharUnits::Zero(),
5216 {APValue::LValuePathEntry::ArrayIndex(0)},
5217 /*OnePastTheEnd=*/false);
5218 else
5219 // Regular pointer or reference to a declaration.
5220 Value = APValue(APValue::LValueBase(D), CharUnits::Zero(),
5221 ArrayRef<APValue::LValuePathEntry>(),
5222 /*OnePastTheEnd=*/false);
5223 mangleValueInTemplateArg(A.getParamTypeForDecl(), Value, /*TopLevel=*/true,
5224 NeedExactType);
5225 break;
5226 }
5227 case TemplateArgument::NullPtr: {
5228 mangleNullPointer(A.getNullPtrType());
5229 break;
5230 }
5231 case TemplateArgument::Pack: {
5232 // <template-arg> ::= J <template-arg>* E
5233 Out << 'J';
5234 for (const auto &P : A.pack_elements())
5235 mangleTemplateArg(P, NeedExactType);
5236 Out << 'E';
5237 }
5238 }
5239}
5240
5241void CXXNameMangler::mangleTemplateArgExpr(const Expr *E) {
5242 ASTContext &Ctx = Context.getASTContext();
5243 if (Ctx.getLangOpts().getClangABICompat() > LangOptions::ClangABI::Ver11) {
5244 mangleExpression(E, UnknownArity, /*AsTemplateArg=*/true);
5245 return;
5246 }
5247
5248 // Prior to Clang 12, we didn't omit the X .. E around <expr-primary>
5249 // correctly in cases where the template argument was
5250 // constructed from an expression rather than an already-evaluated
5251 // literal. In such a case, we would then e.g. emit 'XLi0EE' instead of
5252 // 'Li0E'.
5253 //
5254 // We did special-case DeclRefExpr to attempt to DTRT for that one
5255 // expression-kind, but while doing so, unfortunately handled ParmVarDecl
5256 // (subtype of VarDecl) _incorrectly_, and emitted 'L_Z .. E' instead of
5257 // the proper 'Xfp_E'.
5258 E = E->IgnoreParenImpCasts();
5259 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
5260 const ValueDecl *D = DRE->getDecl();
5261 if (isa<VarDecl>(D) || isa<FunctionDecl>(D)) {
5262 Out << 'L';
5263 mangle(D);
5264 Out << 'E';
5265 return;
5266 }
5267 }
5268 Out << 'X';
5269 mangleExpression(E);
5270 Out << 'E';
5271}
5272
5273/// Determine whether a given value is equivalent to zero-initialization for
5274/// the purpose of discarding a trailing portion of a 'tl' mangling.
5275///
5276/// Note that this is not in general equivalent to determining whether the
5277/// value has an all-zeroes bit pattern.
5278static bool isZeroInitialized(QualType T, const APValue &V) {
5279 // FIXME: mangleValueInTemplateArg has quadratic time complexity in
5280 // pathological cases due to using this, but it's a little awkward
5281 // to do this in linear time in general.
5282 switch (V.getKind()) {
5283 case APValue::None:
5284 case APValue::Indeterminate:
5285 case APValue::AddrLabelDiff:
5286 return false;
5287
5288 case APValue::Struct: {
5289 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5290 assert(RD && "unexpected type for record value")((RD && "unexpected type for record value") ? static_cast
<void> (0) : __assert_fail ("RD && \"unexpected type for record value\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5290, __PRETTY_FUNCTION__))
;
5291 unsigned I = 0;
5292 for (const CXXBaseSpecifier &BS : RD->bases()) {
5293 if (!isZeroInitialized(BS.getType(), V.getStructBase(I)))
5294 return false;
5295 ++I;
5296 }
5297 I = 0;
5298 for (const FieldDecl *FD : RD->fields()) {
5299 if (!FD->isUnnamedBitfield() &&
5300 !isZeroInitialized(FD->getType(), V.getStructField(I)))
5301 return false;
5302 ++I;
5303 }
5304 return true;
5305 }
5306
5307 case APValue::Union: {
5308 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5309 assert(RD && "unexpected type for union value")((RD && "unexpected type for union value") ? static_cast
<void> (0) : __assert_fail ("RD && \"unexpected type for union value\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5309, __PRETTY_FUNCTION__))
;
5310 // Zero-initialization zeroes the first non-unnamed-bitfield field, if any.
5311 for (const FieldDecl *FD : RD->fields()) {
5312 if (!FD->isUnnamedBitfield())
5313 return V.getUnionField() && declaresSameEntity(FD, V.getUnionField()) &&
5314 isZeroInitialized(FD->getType(), V.getUnionValue());
5315 }
5316 // If there are no fields (other than unnamed bitfields), the value is
5317 // necessarily zero-initialized.
5318 return true;
5319 }
5320
5321 case APValue::Array: {
5322 QualType ElemT(T->getArrayElementTypeNoTypeQual(), 0);
5323 for (unsigned I = 0, N = V.getArrayInitializedElts(); I != N; ++I)
5324 if (!isZeroInitialized(ElemT, V.getArrayInitializedElt(I)))
5325 return false;
5326 return !V.hasArrayFiller() || isZeroInitialized(ElemT, V.getArrayFiller());
5327 }
5328
5329 case APValue::Vector: {
5330 const VectorType *VT = T->castAs<VectorType>();
5331 for (unsigned I = 0, N = V.getVectorLength(); I != N; ++I)
5332 if (!isZeroInitialized(VT->getElementType(), V.getVectorElt(I)))
5333 return false;
5334 return true;
5335 }
5336
5337 case APValue::Int:
5338 return !V.getInt();
5339
5340 case APValue::Float:
5341 return V.getFloat().isPosZero();
5342
5343 case APValue::FixedPoint:
5344 return !V.getFixedPoint().getValue();
5345
5346 case APValue::ComplexFloat:
5347 return V.getComplexFloatReal().isPosZero() &&
5348 V.getComplexFloatImag().isPosZero();
5349
5350 case APValue::ComplexInt:
5351 return !V.getComplexIntReal() && !V.getComplexIntImag();
5352
5353 case APValue::LValue:
5354 return V.isNullPointer();
5355
5356 case APValue::MemberPointer:
5357 return !V.getMemberPointerDecl();
5358 }
5359
5360 llvm_unreachable("Unhandled APValue::ValueKind enum")::llvm::llvm_unreachable_internal("Unhandled APValue::ValueKind enum"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5360)
;
5361}
5362
5363static QualType getLValueType(ASTContext &Ctx, const APValue &LV) {
5364 QualType T = LV.getLValueBase().getType();
5365 for (APValue::LValuePathEntry E : LV.getLValuePath()) {
5366 if (const ArrayType *AT = Ctx.getAsArrayType(T))
5367 T = AT->getElementType();
5368 else if (const FieldDecl *FD =
5369 dyn_cast<FieldDecl>(E.getAsBaseOrMember().getPointer()))
5370 T = FD->getType();
5371 else
5372 T = Ctx.getRecordType(
5373 cast<CXXRecordDecl>(E.getAsBaseOrMember().getPointer()));
5374 }
5375 return T;
5376}
5377
5378void CXXNameMangler::mangleValueInTemplateArg(QualType T, const APValue &V,
5379 bool TopLevel,
5380 bool NeedExactType) {
5381 // Ignore all top-level cv-qualifiers, to match GCC.
5382 Qualifiers Quals;
5383 T = getASTContext().getUnqualifiedArrayType(T, Quals);
5384
5385 // A top-level expression that's not a primary expression is wrapped in X...E.
5386 bool IsPrimaryExpr = true;
5387 auto NotPrimaryExpr = [&] {
5388 if (TopLevel && IsPrimaryExpr)
5389 Out << 'X';
5390 IsPrimaryExpr = false;
5391 };
5392
5393 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/63.
5394 switch (V.getKind()) {
5395 case APValue::None:
5396 case APValue::Indeterminate:
5397 Out << 'L';
5398 mangleType(T);
5399 Out << 'E';
5400 break;
5401
5402 case APValue::AddrLabelDiff:
5403 llvm_unreachable("unexpected value kind in template argument")::llvm::llvm_unreachable_internal("unexpected value kind in template argument"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5403)
;
5404
5405 case APValue::Struct: {
5406 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5407 assert(RD && "unexpected type for record value")((RD && "unexpected type for record value") ? static_cast
<void> (0) : __assert_fail ("RD && \"unexpected type for record value\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5407, __PRETTY_FUNCTION__))
;
5408
5409 // Drop trailing zero-initialized elements.
5410 llvm::SmallVector<const FieldDecl *, 16> Fields(RD->field_begin(),
5411 RD->field_end());
5412 while (
5413 !Fields.empty() &&
5414 (Fields.back()->isUnnamedBitfield() ||
5415 isZeroInitialized(Fields.back()->getType(),
5416 V.getStructField(Fields.back()->getFieldIndex())))) {
5417 Fields.pop_back();
5418 }
5419 llvm::ArrayRef<CXXBaseSpecifier> Bases(RD->bases_begin(), RD->bases_end());
5420 if (Fields.empty()) {
5421 while (!Bases.empty() &&
5422 isZeroInitialized(Bases.back().getType(),
5423 V.getStructBase(Bases.size() - 1)))
5424 Bases = Bases.drop_back();
5425 }
5426
5427 // <expression> ::= tl <type> <braced-expression>* E
5428 NotPrimaryExpr();
5429 Out << "tl";
5430 mangleType(T);
5431 for (unsigned I = 0, N = Bases.size(); I != N; ++I)
5432 mangleValueInTemplateArg(Bases[I].getType(), V.getStructBase(I), false);
5433 for (unsigned I = 0, N = Fields.size(); I != N; ++I) {
5434 if (Fields[I]->isUnnamedBitfield())
5435 continue;
5436 mangleValueInTemplateArg(Fields[I]->getType(),
5437 V.getStructField(Fields[I]->getFieldIndex()),
5438 false);
5439 }
5440 Out << 'E';
5441 break;
5442 }
5443
5444 case APValue::Union: {
5445 assert(T->getAsCXXRecordDecl() && "unexpected type for union value")((T->getAsCXXRecordDecl() && "unexpected type for union value"
) ? static_cast<void> (0) : __assert_fail ("T->getAsCXXRecordDecl() && \"unexpected type for union value\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5445, __PRETTY_FUNCTION__))
;
5446 const FieldDecl *FD = V.getUnionField();
5447
5448 if (!FD) {
5449 Out << 'L';
5450 mangleType(T);
5451 Out << 'E';
5452 break;
5453 }
5454
5455 // <braced-expression> ::= di <field source-name> <braced-expression>
5456 NotPrimaryExpr();
5457 Out << "tl";
5458 mangleType(T);
5459 if (!isZeroInitialized(T, V)) {
5460 Out << "di";
5461 mangleSourceName(FD->getIdentifier());
5462 mangleValueInTemplateArg(FD->getType(), V.getUnionValue(), false);
5463 }
5464 Out << 'E';
5465 break;
5466 }
5467
5468 case APValue::Array: {
5469 QualType ElemT(T->getArrayElementTypeNoTypeQual(), 0);
5470
5471 NotPrimaryExpr();
5472 Out << "tl";
5473 mangleType(T);
5474
5475 // Drop trailing zero-initialized elements.
5476 unsigned N = V.getArraySize();
5477 if (!V.hasArrayFiller() || isZeroInitialized(ElemT, V.getArrayFiller())) {
5478 N = V.getArrayInitializedElts();
5479 while (N && isZeroInitialized(ElemT, V.getArrayInitializedElt(N - 1)))
5480 --N;
5481 }
5482
5483 for (unsigned I = 0; I != N; ++I) {
5484 const APValue &Elem = I < V.getArrayInitializedElts()
5485 ? V.getArrayInitializedElt(I)
5486 : V.getArrayFiller();
5487 mangleValueInTemplateArg(ElemT, Elem, false);
5488 }
5489 Out << 'E';
5490 break;
5491 }
5492
5493 case APValue::Vector: {
5494 const VectorType *VT = T->castAs<VectorType>();
5495
5496 NotPrimaryExpr();
5497 Out << "tl";
5498 mangleType(T);
5499 unsigned N = V.getVectorLength();
5500 while (N && isZeroInitialized(VT->getElementType(), V.getVectorElt(N - 1)))
5501 --N;
5502 for (unsigned I = 0; I != N; ++I)
5503 mangleValueInTemplateArg(VT->getElementType(), V.getVectorElt(I), false);
5504 Out << 'E';
5505 break;
5506 }
5507
5508 case APValue::Int:
5509 mangleIntegerLiteral(T, V.getInt());
5510 break;
5511
5512 case APValue::Float:
5513 mangleFloatLiteral(T, V.getFloat());
5514 break;
5515
5516 case APValue::FixedPoint:
5517 mangleFixedPointLiteral();
5518 break;
5519
5520 case APValue::ComplexFloat: {
5521 const ComplexType *CT = T->castAs<ComplexType>();
5522 NotPrimaryExpr();
5523 Out << "tl";
5524 mangleType(T);
5525 if (!V.getComplexFloatReal().isPosZero() ||
5526 !V.getComplexFloatImag().isPosZero())
5527 mangleFloatLiteral(CT->getElementType(), V.getComplexFloatReal());
5528 if (!V.getComplexFloatImag().isPosZero())
5529 mangleFloatLiteral(CT->getElementType(), V.getComplexFloatImag());
5530 Out << 'E';
5531 break;
5532 }
5533
5534 case APValue::ComplexInt: {
5535 const ComplexType *CT = T->castAs<ComplexType>();
5536 NotPrimaryExpr();
5537 Out << "tl";
5538 mangleType(T);
5539 if (V.getComplexIntReal().getBoolValue() ||
5540 V.getComplexIntImag().getBoolValue())
5541 mangleIntegerLiteral(CT->getElementType(), V.getComplexIntReal());
5542 if (V.getComplexIntImag().getBoolValue())
5543 mangleIntegerLiteral(CT->getElementType(), V.getComplexIntImag());
5544 Out << 'E';
5545 break;
5546 }
5547
5548 case APValue::LValue: {
5549 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/47.
5550 assert((T->isPointerType() || T->isReferenceType()) &&(((T->isPointerType() || T->isReferenceType()) &&
"unexpected type for LValue template arg") ? static_cast<
void> (0) : __assert_fail ("(T->isPointerType() || T->isReferenceType()) && \"unexpected type for LValue template arg\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5551, __PRETTY_FUNCTION__))
5551 "unexpected type for LValue template arg")(((T->isPointerType() || T->isReferenceType()) &&
"unexpected type for LValue template arg") ? static_cast<
void> (0) : __assert_fail ("(T->isPointerType() || T->isReferenceType()) && \"unexpected type for LValue template arg\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5551, __PRETTY_FUNCTION__))
;
5552
5553 if (V.isNullPointer()) {
5554 mangleNullPointer(T);
5555 break;
5556 }
5557
5558 APValue::LValueBase B = V.getLValueBase();
5559 if (!B) {
5560 // Non-standard mangling for integer cast to a pointer; this can only
5561 // occur as an extension.
5562 CharUnits Offset = V.getLValueOffset();
5563 if (Offset.isZero()) {
5564 // This is reinterpret_cast<T*>(0), not a null pointer. Mangle this as
5565 // a cast, because L <type> 0 E means something else.
5566 NotPrimaryExpr();
5567 Out << "rc";
5568 mangleType(T);
5569 Out << "Li0E";
5570 if (TopLevel)
5571 Out << 'E';
5572 } else {
5573 Out << "L";
5574 mangleType(T);
5575 Out << Offset.getQuantity() << 'E';
5576 }
5577 break;
5578 }
5579
5580 ASTContext &Ctx = Context.getASTContext();
5581
5582 enum { Base, Offset, Path } Kind;
5583 if (!V.hasLValuePath()) {
5584 // Mangle as (T*)((char*)&base + N).
5585 if (T->isReferenceType()) {
5586 NotPrimaryExpr();
5587 Out << "decvP";
5588 mangleType(T->getPointeeType());
5589 } else {
5590 NotPrimaryExpr();
5591 Out << "cv";
5592 mangleType(T);
5593 }
5594 Out << "plcvPcad";
5595 Kind = Offset;
5596 } else {
5597 if (!V.getLValuePath().empty() || V.isLValueOnePastTheEnd()) {
5598 NotPrimaryExpr();
5599 // A final conversion to the template parameter's type is usually
5600 // folded into the 'so' mangling, but we can't do that for 'void*'
5601 // parameters without introducing collisions.
5602 if (NeedExactType && T->isVoidPointerType()) {
5603 Out << "cv";
5604 mangleType(T);
5605 }
5606 if (T->isPointerType())
5607 Out << "ad";
5608 Out << "so";
5609 mangleType(T->isVoidPointerType()
5610 ? getLValueType(Ctx, V).getUnqualifiedType()
5611 : T->getPointeeType());
5612 Kind = Path;
5613 } else {
5614 if (NeedExactType &&
5615 !Ctx.hasSameType(T->getPointeeType(), getLValueType(Ctx, V)) &&
5616 Ctx.getLangOpts().getClangABICompat() >
5617 LangOptions::ClangABI::Ver11) {
5618 NotPrimaryExpr();
5619 Out << "cv";
5620 mangleType(T);
5621 }
5622 if (T->isPointerType()) {
5623 NotPrimaryExpr();
5624 Out << "ad";
5625 }
5626 Kind = Base;
5627 }
5628 }
5629
5630 QualType TypeSoFar = B.getType();
5631 if (auto *VD = B.dyn_cast<const ValueDecl*>()) {
5632 Out << 'L';
5633 mangle(VD);
5634 Out << 'E';
5635 } else if (auto *E = B.dyn_cast<const Expr*>()) {
5636 NotPrimaryExpr();
5637 mangleExpression(E);
5638 } else if (auto TI = B.dyn_cast<TypeInfoLValue>()) {
5639 NotPrimaryExpr();
5640 Out << "ti";
5641 mangleType(QualType(TI.getType(), 0));
5642 } else {
5643 // We should never see dynamic allocations here.
5644 llvm_unreachable("unexpected lvalue base kind in template argument")::llvm::llvm_unreachable_internal("unexpected lvalue base kind in template argument"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5644)
;
5645 }
5646
5647 switch (Kind) {
5648 case Base:
5649 break;
5650
5651 case Offset:
5652 Out << 'L';
5653 mangleType(Ctx.getPointerDiffType());
5654 mangleNumber(V.getLValueOffset().getQuantity());
5655 Out << 'E';
5656 break;
5657
5658 case Path:
5659 // <expression> ::= so <referent type> <expr> [<offset number>]
5660 // <union-selector>* [p] E
5661 if (!V.getLValueOffset().isZero())
5662 mangleNumber(V.getLValueOffset().getQuantity());
5663
5664 // We model a past-the-end array pointer as array indexing with index N,
5665 // not with the "past the end" flag. Compensate for that.
5666 bool OnePastTheEnd = V.isLValueOnePastTheEnd();
5667
5668 for (APValue::LValuePathEntry E : V.getLValuePath()) {
5669 if (auto *AT = TypeSoFar->getAsArrayTypeUnsafe()) {
5670 if (auto *CAT = dyn_cast<ConstantArrayType>(AT))
5671 OnePastTheEnd |= CAT->getSize() == E.getAsArrayIndex();
5672 TypeSoFar = AT->getElementType();
5673 } else {
5674 const Decl *D = E.getAsBaseOrMember().getPointer();
5675 if (auto *FD = dyn_cast<FieldDecl>(D)) {
5676 // <union-selector> ::= _ <number>
5677 if (FD->getParent()->isUnion()) {
5678 Out << '_';
5679 if (FD->getFieldIndex())
5680 Out << (FD->getFieldIndex() - 1);
5681 }
5682 TypeSoFar = FD->getType();
5683 } else {
5684 TypeSoFar = Ctx.getRecordType(cast<CXXRecordDecl>(D));
5685 }
5686 }
5687 }
5688
5689 if (OnePastTheEnd)
5690 Out << 'p';
5691 Out << 'E';
5692 break;
5693 }
5694
5695 break;
5696 }
5697
5698 case APValue::MemberPointer:
5699 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/47.
5700 if (!V.getMemberPointerDecl()) {
5701 mangleNullPointer(T);
5702 break;
5703 }
5704
5705 ASTContext &Ctx = Context.getASTContext();
5706
5707 NotPrimaryExpr();
5708 if (!V.getMemberPointerPath().empty()) {
5709 Out << "mc";
5710 mangleType(T);
5711 } else if (NeedExactType &&
5712 !Ctx.hasSameType(
5713 T->castAs<MemberPointerType>()->getPointeeType(),
5714 V.getMemberPointerDecl()->getType()) &&
5715 Ctx.getLangOpts().getClangABICompat() >
5716 LangOptions::ClangABI::Ver11) {
5717 Out << "cv";
5718 mangleType(T);
5719 }
5720 Out << "adL";
5721 mangle(V.getMemberPointerDecl());
5722 Out << 'E';
5723 if (!V.getMemberPointerPath().empty()) {
5724 CharUnits Offset =
5725 Context.getASTContext().getMemberPointerPathAdjustment(V);
5726 if (!Offset.isZero())
5727 mangleNumber(Offset.getQuantity());
5728 Out << 'E';
5729 }
5730 break;
5731 }
5732
5733 if (TopLevel && !IsPrimaryExpr)
5734 Out << 'E';
5735}
5736
5737void CXXNameMangler::mangleTemplateParameter(unsigned Depth, unsigned Index) {
5738 // <template-param> ::= T_ # first template parameter
5739 // ::= T <parameter-2 non-negative number> _
5740 // ::= TL <L-1 non-negative number> __
5741 // ::= TL <L-1 non-negative number> _
5742 // <parameter-2 non-negative number> _
5743 //
5744 // The latter two manglings are from a proposal here:
5745 // https://github.com/itanium-cxx-abi/cxx-abi/issues/31#issuecomment-528122117
5746 Out << 'T';
5747 if (Depth != 0)
5748 Out << 'L' << (Depth - 1) << '_';
5749 if (Index != 0)
5750 Out << (Index - 1);
5751 Out << '_';
5752}
5753
5754void CXXNameMangler::mangleSeqID(unsigned SeqID) {
5755 if (SeqID == 1)
5756 Out << '0';
5757 else if (SeqID > 1) {
5758 SeqID--;
5759
5760 // <seq-id> is encoded in base-36, using digits and upper case letters.
5761 char Buffer[7]; // log(2**32) / log(36) ~= 7
5762 MutableArrayRef<char> BufferRef(Buffer);
5763 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
5764
5765 for (; SeqID != 0; SeqID /= 36) {
5766 unsigned C = SeqID % 36;
5767 *I++ = (C < 10 ? '0' + C : 'A' + C - 10);
5768 }
5769
5770 Out.write(I.base(), I - BufferRef.rbegin());
5771 }
5772 Out << '_';
5773}
5774
5775void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) {
5776 bool result = mangleSubstitution(tname);
5777 assert(result && "no existing substitution for template name")((result && "no existing substitution for template name"
) ? static_cast<void> (0) : __assert_fail ("result && \"no existing substitution for template name\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/AST/ItaniumMangle.cpp"
, 5777, __PRETTY_FUNCTION__))
;
5778 (void) result;
5779}
5780
5781// <substitution> ::= S <seq-id> _
5782// ::= S_
5783bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) {
5784 // Try one of the standard substitutions first.
5785 if (mangleStandardSubstitution(ND))
5786 return true;
5787
5788 ND = cast<NamedDecl>(ND->getCanonicalDecl());
5789 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND));
5790}
5791
5792/// Determine whether the given type has any qualifiers that are relevant for
5793/// substitutions.
5794static bool hasMangledSubstitutionQualifiers(QualType T) {
5795 Qualifiers Qs = T.getQualifiers();
5796 return Qs.getCVRQualifiers() || Qs.hasAddressSpace() || Qs.hasUnaligned();
5797}
5798
5799bool CXXNameMangler::mangleSubstitution(QualType T) {
5800 if (!hasMangledSubstitutionQualifiers(T)) {
5801 if (const RecordType *RT = T->getAs<RecordType>())
5802 return mangleSubstitution(RT->getDecl());
5803 }
5804
5805 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
5806
5807 return mangleSubstitution(TypePtr);
5808}
5809
5810bool CXXNameMangler::mangleSubstitution(TemplateName Template) {
5811 if (TemplateDecl *TD = Template.getAsTemplateDecl())
5812 return mangleSubstitution(TD);
5813
5814 Template = Context.getASTContext().getCanonicalTemplateName(Template);
5815 return mangleSubstitution(
5816 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer()));
5817}
5818
5819bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) {
5820 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr);
5821 if (I == Substitutions.end())
5822 return false;
5823
5824 unsigned SeqID = I->second;
5825 Out << 'S';
5826 mangleSeqID(SeqID);
5827
5828 return true;
5829}
5830
5831static bool isCharType(QualType T) {
5832 if (T.isNull())
5833 return false;
5834
5835 return T->isSpecificBuiltinType(BuiltinType::Char_S) ||
5836 T->isSpecificBuiltinType(BuiltinType::Char_U);
5837}
5838
5839/// Returns whether a given type is a template specialization of a given name
5840/// with a single argument of type char.
5841static bool isCharSpecialization(QualType T, const char *Name) {
5842 if (T.isNull())
5843 return false;
5844
5845 const RecordType *RT = T->getAs<RecordType>();
5846 if (!RT)
5847 return false;
5848
5849 const ClassTemplateSpecializationDecl *SD =
5850 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl());
5851 if (!SD)
5852 return false;
5853
5854 if (!isStdNamespace(getEffectiveDeclContext(SD)))
5855 return false;
5856
5857 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5858 if (TemplateArgs.size() != 1)
5859 return false;
5860
5861 if (!isCharType(TemplateArgs[0].getAsType()))
5862 return false;
5863
5864 return SD->getIdentifier()->getName() == Name;
5865}
5866
5867template <std::size_t StrLen>
5868static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD,
5869 const char (&Str)[StrLen]) {
5870 if (!SD->getIdentifier()->isStr(Str))
5871 return false;
5872
5873 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5874 if (TemplateArgs.size() != 2)
5875 return false;
5876
5877 if (!isCharType(TemplateArgs[0].getAsType()))
5878 return false;
5879
5880 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
5881 return false;
5882
5883 return true;
5884}
5885
5886bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) {
5887 // <substitution> ::= St # ::std::
5888 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
5889 if (isStd(NS)) {
5890 Out << "St";
5891 return true;
5892 }
5893 }
5894
5895 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) {
5896 if (!isStdNamespace(getEffectiveDeclContext(TD)))
5897 return false;
5898
5899 // <substitution> ::= Sa # ::std::allocator
5900 if (TD->getIdentifier()->isStr("allocator")) {
5901 Out << "Sa";
5902 return true;
5903 }
5904
5905 // <<substitution> ::= Sb # ::std::basic_string
5906 if (TD->getIdentifier()->isStr("basic_string")) {
5907 Out << "Sb";
5908 return true;
5909 }
5910 }
5911
5912 if (const ClassTemplateSpecializationDecl *SD =
5913 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
5914 if (!isStdNamespace(getEffectiveDeclContext(SD)))
5915 return false;
5916
5917 // <substitution> ::= Ss # ::std::basic_string<char,
5918 // ::std::char_traits<char>,
5919 // ::std::allocator<char> >
5920 if (SD->getIdentifier()->isStr("basic_string")) {
5921 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5922
5923 if (TemplateArgs.size() != 3)
5924 return false;
5925
5926 if (!isCharType(TemplateArgs[0].getAsType()))
5927 return false;
5928
5929 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
5930 return false;
5931
5932 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator"))
5933 return false;
5934
5935 Out << "Ss";
5936 return true;
5937 }
5938
5939 // <substitution> ::= Si # ::std::basic_istream<char,
5940 // ::std::char_traits<char> >
5941 if (isStreamCharSpecialization(SD, "basic_istream")) {
5942 Out << "Si";
5943 return true;
5944 }
5945
5946 // <substitution> ::= So # ::std::basic_ostream<char,
5947 // ::std::char_traits<char> >
5948 if (isStreamCharSpecialization(SD, "basic_ostream")) {
5949 Out << "So";
5950 return true;
5951 }
5952
5953 // <substitution> ::= Sd # ::std::basic_iostream<char,
5954 // ::std::char_traits<char> >
5955 if (isStreamCharSpecialization(SD, "basic_iostream")) {
5956 Out << "Sd";
5957 return true;
5958 }
5959 }
5960 return false;