Bug Summary

File:clang/lib/AST/ItaniumMangle.cpp
Warning:line 292, 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 -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/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/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/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/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-12~++20210124100612+2afaf072f5c1/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1=. -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 -o /tmp/scan-build-2021-01-24-223304-31662-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp

/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/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
128public:
129 explicit ItaniumMangleContextImpl(ASTContext &Context,
130 DiagnosticsEngine &Diags)
131 : ItaniumMangleContext(Context, Diags) {}
132
133 /// @name Mangler Entry Points
134 /// @{
135
136 bool shouldMangleCXXName(const NamedDecl *D) override;
137 bool shouldMangleStringLiteral(const StringLiteral *) override {
138 return false;
139 }
140 void mangleCXXName(GlobalDecl GD, raw_ostream &) override;
141 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
142 raw_ostream &) override;
143 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
144 const ThisAdjustment &ThisAdjustment,
145 raw_ostream &) override;
146 void mangleReferenceTemporary(const VarDecl *D, unsigned ManglingNumber,
147 raw_ostream &) override;
148 void mangleCXXVTable(const CXXRecordDecl *RD, raw_ostream &) override;
149 void mangleCXXVTT(const CXXRecordDecl *RD, raw_ostream &) override;
150 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
151 const CXXRecordDecl *Type, raw_ostream &) override;
152 void mangleCXXRTTI(QualType T, raw_ostream &) override;
153 void mangleCXXRTTIName(QualType T, raw_ostream &) override;
154 void mangleTypeName(QualType T, raw_ostream &) override;
155
156 void mangleCXXCtorComdat(const CXXConstructorDecl *D, raw_ostream &) override;
157 void mangleCXXDtorComdat(const CXXDestructorDecl *D, raw_ostream &) override;
158 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &) override;
159 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
160 void mangleDynamicAtExitDestructor(const VarDecl *D,
161 raw_ostream &Out) override;
162 void mangleDynamicStermFinalizer(const VarDecl *D, raw_ostream &Out) override;
163 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
164 raw_ostream &Out) override;
165 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
166 raw_ostream &Out) override;
167 void mangleItaniumThreadLocalInit(const VarDecl *D, raw_ostream &) override;
168 void mangleItaniumThreadLocalWrapper(const VarDecl *D,
169 raw_ostream &) override;
170
171 void mangleStringLiteral(const StringLiteral *, raw_ostream &) override;
172
173 void mangleLambdaSig(const CXXRecordDecl *Lambda, raw_ostream &) override;
174
175 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
176 // Lambda closure types are already numbered.
177 if (isLambda(ND))
178 return false;
179
180 // Anonymous tags are already numbered.
181 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
182 if (Tag->getName().empty() && !Tag->getTypedefNameForAnonDecl())
183 return false;
184 }
185
186 // Use the canonical number for externally visible decls.
187 if (ND->isExternallyVisible()) {
188 unsigned discriminator = getASTContext().getManglingNumber(ND);
189 if (discriminator == 1)
190 return false;
191 disc = discriminator - 2;
192 return true;
193 }
194
195 // Make up a reasonable number for internal decls.
196 unsigned &discriminator = Uniquifier[ND];
197 if (!discriminator) {
198 const DeclContext *DC = getEffectiveDeclContext(ND);
199 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
200 }
201 if (discriminator == 1)
202 return false;
203 disc = discriminator-2;
204 return true;
205 }
206 /// @}
207};
208
209/// Manage the mangling of a single name.
210class CXXNameMangler {
211 ItaniumMangleContextImpl &Context;
212 raw_ostream &Out;
213 bool NullOut = false;
214 /// In the "DisableDerivedAbiTags" mode derived ABI tags are not calculated.
215 /// This mode is used when mangler creates another mangler recursively to
216 /// calculate ABI tags for the function return value or the variable type.
217 /// Also it is required to avoid infinite recursion in some cases.
218 bool DisableDerivedAbiTags = false;
219
220 /// The "structor" is the top-level declaration being mangled, if
221 /// that's not a template specialization; otherwise it's the pattern
222 /// for that specialization.
223 const NamedDecl *Structor;
224 unsigned StructorType;
225
226 /// The next substitution sequence number.
227 unsigned SeqID;
228
229 class FunctionTypeDepthState {
230 unsigned Bits;
231
232 enum { InResultTypeMask = 1 };
233
234 public:
235 FunctionTypeDepthState() : Bits(0) {}
236
237 /// The number of function types we're inside.
238 unsigned getDepth() const {
239 return Bits >> 1;
240 }
241
242 /// True if we're in the return type of the innermost function type.
243 bool isInResultType() const {
244 return Bits & InResultTypeMask;
245 }
246
247 FunctionTypeDepthState push() {
248 FunctionTypeDepthState tmp = *this;
249 Bits = (Bits & ~InResultTypeMask) + 2;
250 return tmp;
251 }
252
253 void enterResultType() {
254 Bits |= InResultTypeMask;
255 }
256
257 void leaveResultType() {
258 Bits &= ~InResultTypeMask;
259 }
260
261 void pop(FunctionTypeDepthState saved) {
262 assert(getDepth() == saved.getDepth() + 1)((getDepth() == saved.getDepth() + 1) ? static_cast<void>
(0) : __assert_fail ("getDepth() == saved.getDepth() + 1", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 262, __PRETTY_FUNCTION__))
;
263 Bits = saved.Bits;
264 }
265
266 } FunctionTypeDepth;
267
268 // abi_tag is a gcc attribute, taking one or more strings called "tags".
269 // The goal is to annotate against which version of a library an object was
270 // built and to be able to provide backwards compatibility ("dual abi").
271 // For more information see docs/ItaniumMangleAbiTags.rst.
272 typedef SmallVector<StringRef, 4> AbiTagList;
273
274 // State to gather all implicit and explicit tags used in a mangled name.
275 // Must always have an instance of this while emitting any name to keep
276 // track.
277 class AbiTagState final {
278 public:
279 explicit AbiTagState(AbiTagState *&Head) : LinkHead(Head) {
280 Parent = LinkHead;
281 LinkHead = this;
282 }
283
284 // No copy, no move.
285 AbiTagState(const AbiTagState &) = delete;
286 AbiTagState &operator=(const AbiTagState &) = delete;
287
288 ~AbiTagState() { pop(); }
289
290 void write(raw_ostream &Out, const NamedDecl *ND,
291 const AbiTagList *AdditionalAbiTags) {
292 ND = cast<NamedDecl>(ND->getCanonicalDecl());
19
Called C++ object pointer is null
293 if (!isa<FunctionDecl>(ND) && !isa<VarDecl>(ND)) {
294 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 296, __PRETTY_FUNCTION__))
295 !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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 296, __PRETTY_FUNCTION__))
296 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 296, __PRETTY_FUNCTION__))
;
297 if (const auto *NS = dyn_cast<NamespaceDecl>(ND)) {
298 if (const auto *AbiTag = NS->getAttr<AbiTagAttr>()) {
299 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
300 AbiTag->tags().end());
301 }
302 // Don't emit abi tags for namespaces.
303 return;
304 }
305 }
306
307 AbiTagList TagList;
308 if (const auto *AbiTag = ND->getAttr<AbiTagAttr>()) {
309 UsedAbiTags.insert(UsedAbiTags.end(), AbiTag->tags().begin(),
310 AbiTag->tags().end());
311 TagList.insert(TagList.end(), AbiTag->tags().begin(),
312 AbiTag->tags().end());
313 }
314
315 if (AdditionalAbiTags) {
316 UsedAbiTags.insert(UsedAbiTags.end(), AdditionalAbiTags->begin(),
317 AdditionalAbiTags->end());
318 TagList.insert(TagList.end(), AdditionalAbiTags->begin(),
319 AdditionalAbiTags->end());
320 }
321
322 llvm::sort(TagList);
323 TagList.erase(std::unique(TagList.begin(), TagList.end()), TagList.end());
324
325 writeSortedUniqueAbiTags(Out, TagList);
326 }
327
328 const AbiTagList &getUsedAbiTags() const { return UsedAbiTags; }
329 void setUsedAbiTags(const AbiTagList &AbiTags) {
330 UsedAbiTags = AbiTags;
331 }
332
333 const AbiTagList &getEmittedAbiTags() const {
334 return EmittedAbiTags;
335 }
336
337 const AbiTagList &getSortedUniqueUsedAbiTags() {
338 llvm::sort(UsedAbiTags);
339 UsedAbiTags.erase(std::unique(UsedAbiTags.begin(), UsedAbiTags.end()),
340 UsedAbiTags.end());
341 return UsedAbiTags;
342 }
343
344 private:
345 //! All abi tags used implicitly or explicitly.
346 AbiTagList UsedAbiTags;
347 //! All explicit abi tags (i.e. not from namespace).
348 AbiTagList EmittedAbiTags;
349
350 AbiTagState *&LinkHead;
351 AbiTagState *Parent = nullptr;
352
353 void pop() {
354 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 355, __PRETTY_FUNCTION__))
355 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 355, __PRETTY_FUNCTION__))
;
356 if (Parent) {
357 Parent->UsedAbiTags.insert(Parent->UsedAbiTags.end(),
358 UsedAbiTags.begin(), UsedAbiTags.end());
359 Parent->EmittedAbiTags.insert(Parent->EmittedAbiTags.end(),
360 EmittedAbiTags.begin(),
361 EmittedAbiTags.end());
362 }
363 LinkHead = Parent;
364 }
365
366 void writeSortedUniqueAbiTags(raw_ostream &Out, const AbiTagList &AbiTags) {
367 for (const auto &Tag : AbiTags) {
368 EmittedAbiTags.push_back(Tag);
369 Out << "B";
370 Out << Tag.size();
371 Out << Tag;
372 }
373 }
374 };
375
376 AbiTagState *AbiTags = nullptr;
377 AbiTagState AbiTagsRoot;
378
379 llvm::DenseMap<uintptr_t, unsigned> Substitutions;
380 llvm::DenseMap<StringRef, unsigned> ModuleSubstitutions;
381
382 ASTContext &getASTContext() const { return Context.getASTContext(); }
383
384public:
385 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
386 const NamedDecl *D = nullptr, bool NullOut_ = false)
387 : Context(C), Out(Out_), NullOut(NullOut_), Structor(getStructor(D)),
388 StructorType(0), SeqID(0), AbiTagsRoot(AbiTags) {
389 // These can't be mangled without a ctor type or dtor type.
390 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 391, __PRETTY_FUNCTION__))
391 !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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 391, __PRETTY_FUNCTION__))
;
392 }
393 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
394 const CXXConstructorDecl *D, CXXCtorType Type)
395 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
396 SeqID(0), AbiTagsRoot(AbiTags) { }
397 CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
398 const CXXDestructorDecl *D, CXXDtorType Type)
399 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
400 SeqID(0), AbiTagsRoot(AbiTags) { }
401
402 CXXNameMangler(CXXNameMangler &Outer, raw_ostream &Out_)
403 : Context(Outer.Context), Out(Out_), NullOut(false),
404 Structor(Outer.Structor), StructorType(Outer.StructorType),
405 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
406 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
407
408 CXXNameMangler(CXXNameMangler &Outer, llvm::raw_null_ostream &Out_)
409 : Context(Outer.Context), Out(Out_), NullOut(true),
410 Structor(Outer.Structor), StructorType(Outer.StructorType),
411 SeqID(Outer.SeqID), FunctionTypeDepth(Outer.FunctionTypeDepth),
412 AbiTagsRoot(AbiTags), Substitutions(Outer.Substitutions) {}
413
414 raw_ostream &getStream() { return Out; }
415
416 void disableDerivedAbiTags() { DisableDerivedAbiTags = true; }
417 static bool shouldHaveAbiTags(ItaniumMangleContextImpl &C, const VarDecl *VD);
418
419 void mangle(GlobalDecl GD);
420 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual);
421 void mangleNumber(const llvm::APSInt &I);
422 void mangleNumber(int64_t Number);
423 void mangleFloat(const llvm::APFloat &F);
424 void mangleFunctionEncoding(GlobalDecl GD);
425 void mangleSeqID(unsigned SeqID);
426 void mangleName(GlobalDecl GD);
427 void mangleType(QualType T);
428 void mangleNameOrStandardSubstitution(const NamedDecl *ND);
429 void mangleLambdaSig(const CXXRecordDecl *Lambda);
430
431private:
432
433 bool mangleSubstitution(const NamedDecl *ND);
434 bool mangleSubstitution(QualType T);
435 bool mangleSubstitution(TemplateName Template);
436 bool mangleSubstitution(uintptr_t Ptr);
437
438 void mangleExistingSubstitution(TemplateName name);
439
440 bool mangleStandardSubstitution(const NamedDecl *ND);
441
442 void addSubstitution(const NamedDecl *ND) {
443 ND = cast<NamedDecl>(ND->getCanonicalDecl());
444
445 addSubstitution(reinterpret_cast<uintptr_t>(ND));
446 }
447 void addSubstitution(QualType T);
448 void addSubstitution(TemplateName Template);
449 void addSubstitution(uintptr_t Ptr);
450 // Destructive copy substitutions from other mangler.
451 void extendSubstitutions(CXXNameMangler* Other);
452
453 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
454 bool recursive = false);
455 void mangleUnresolvedName(NestedNameSpecifier *qualifier,
456 DeclarationName name,
457 const TemplateArgumentLoc *TemplateArgs,
458 unsigned NumTemplateArgs,
459 unsigned KnownArity = UnknownArity);
460
461 void mangleFunctionEncodingBareType(const FunctionDecl *FD);
462
463 void mangleNameWithAbiTags(GlobalDecl GD,
464 const AbiTagList *AdditionalAbiTags);
465 void mangleModuleName(const Module *M);
466 void mangleModuleNamePrefix(StringRef Name);
467 void mangleTemplateName(const TemplateDecl *TD,
468 const TemplateArgument *TemplateArgs,
469 unsigned NumTemplateArgs);
470 void mangleUnqualifiedName(GlobalDecl GD,
471 const AbiTagList *AdditionalAbiTags) {
472 mangleUnqualifiedName(GD, cast<NamedDecl>(GD.getDecl())->getDeclName(), UnknownArity,
473 AdditionalAbiTags);
474 }
475 void mangleUnqualifiedName(GlobalDecl GD, DeclarationName Name,
476 unsigned KnownArity,
477 const AbiTagList *AdditionalAbiTags);
478 void mangleUnscopedName(GlobalDecl GD,
479 const AbiTagList *AdditionalAbiTags);
480 void mangleUnscopedTemplateName(GlobalDecl GD,
481 const AbiTagList *AdditionalAbiTags);
482 void mangleSourceName(const IdentifierInfo *II);
483 void mangleRegCallName(const IdentifierInfo *II);
484 void mangleDeviceStubName(const IdentifierInfo *II);
485 void mangleSourceNameWithAbiTags(
486 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags = nullptr);
487 void mangleLocalName(GlobalDecl GD,
488 const AbiTagList *AdditionalAbiTags);
489 void mangleBlockForPrefix(const BlockDecl *Block);
490 void mangleUnqualifiedBlock(const BlockDecl *Block);
491 void mangleTemplateParamDecl(const NamedDecl *Decl);
492 void mangleLambda(const CXXRecordDecl *Lambda);
493 void mangleNestedName(GlobalDecl GD, const DeclContext *DC,
494 const AbiTagList *AdditionalAbiTags,
495 bool NoFunction=false);
496 void mangleNestedName(const TemplateDecl *TD,
497 const TemplateArgument *TemplateArgs,
498 unsigned NumTemplateArgs);
499 void manglePrefix(NestedNameSpecifier *qualifier);
500 void manglePrefix(const DeclContext *DC, bool NoFunction=false);
501 void manglePrefix(QualType type);
502 void mangleTemplatePrefix(GlobalDecl GD, bool NoFunction=false);
503 void mangleTemplatePrefix(TemplateName Template);
504 bool mangleUnresolvedTypeOrSimpleId(QualType DestroyedType,
505 StringRef Prefix = "");
506 void mangleOperatorName(DeclarationName Name, unsigned Arity);
507 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity);
508 void mangleVendorQualifier(StringRef qualifier);
509 void mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST = nullptr);
510 void mangleRefQualifier(RefQualifierKind RefQualifier);
511
512 void mangleObjCMethodName(const ObjCMethodDecl *MD);
513
514 // Declare manglers for every type class.
515#define ABSTRACT_TYPE(CLASS, PARENT)
516#define NON_CANONICAL_TYPE(CLASS, PARENT)
517#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T);
518#include "clang/AST/TypeNodes.inc"
519
520 void mangleType(const TagType*);
521 void mangleType(TemplateName);
522 static StringRef getCallingConvQualifierName(CallingConv CC);
523 void mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo info);
524 void mangleExtFunctionInfo(const FunctionType *T);
525 void mangleBareFunctionType(const FunctionProtoType *T, bool MangleReturnType,
526 const FunctionDecl *FD = nullptr);
527 void mangleNeonVectorType(const VectorType *T);
528 void mangleNeonVectorType(const DependentVectorType *T);
529 void mangleAArch64NeonVectorType(const VectorType *T);
530 void mangleAArch64NeonVectorType(const DependentVectorType *T);
531 void mangleAArch64FixedSveVectorType(const VectorType *T);
532 void mangleAArch64FixedSveVectorType(const DependentVectorType *T);
533
534 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value);
535 void mangleFloatLiteral(QualType T, const llvm::APFloat &V);
536 void mangleFixedPointLiteral();
537 void mangleNullPointer(QualType T);
538
539 void mangleMemberExprBase(const Expr *base, bool isArrow);
540 void mangleMemberExpr(const Expr *base, bool isArrow,
541 NestedNameSpecifier *qualifier,
542 NamedDecl *firstQualifierLookup,
543 DeclarationName name,
544 const TemplateArgumentLoc *TemplateArgs,
545 unsigned NumTemplateArgs,
546 unsigned knownArity);
547 void mangleCastExpression(const Expr *E, StringRef CastEncoding);
548 void mangleInitListElements(const InitListExpr *InitList);
549 void mangleDeclRefExpr(const NamedDecl *D);
550 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity);
551 void mangleCXXCtorType(CXXCtorType T, const CXXRecordDecl *InheritedFrom);
552 void mangleCXXDtorType(CXXDtorType T);
553
554 void mangleTemplateArgs(TemplateName TN,
555 const TemplateArgumentLoc *TemplateArgs,
556 unsigned NumTemplateArgs);
557 void mangleTemplateArgs(TemplateName TN, const TemplateArgument *TemplateArgs,
558 unsigned NumTemplateArgs);
559 void mangleTemplateArgs(TemplateName TN, const TemplateArgumentList &AL);
560 void mangleTemplateArg(TemplateArgument A, bool NeedExactType);
561 void mangleValueInTemplateArg(QualType T, const APValue &V, bool TopLevel,
562 bool NeedExactType = false);
563
564 void mangleTemplateParameter(unsigned Depth, unsigned Index);
565
566 void mangleFunctionParam(const ParmVarDecl *parm);
567
568 void writeAbiTags(const NamedDecl *ND,
569 const AbiTagList *AdditionalAbiTags);
570
571 // Returns sorted unique list of ABI tags.
572 AbiTagList makeFunctionReturnTypeTags(const FunctionDecl *FD);
573 // Returns sorted unique list of ABI tags.
574 AbiTagList makeVariableTypeTags(const VarDecl *VD);
575};
576
577}
578
579bool ItaniumMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
580 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
581 if (FD) {
582 LanguageLinkage L = FD->getLanguageLinkage();
583 // Overloadable functions need mangling.
584 if (FD->hasAttr<OverloadableAttr>())
585 return true;
586
587 // "main" is not mangled.
588 if (FD->isMain())
589 return false;
590
591 // The Windows ABI expects that we would never mangle "typical"
592 // user-defined entry points regardless of visibility or freestanding-ness.
593 //
594 // N.B. This is distinct from asking about "main". "main" has a lot of
595 // special rules associated with it in the standard while these
596 // user-defined entry points are outside of the purview of the standard.
597 // For example, there can be only one definition for "main" in a standards
598 // compliant program; however nothing forbids the existence of wmain and
599 // WinMain in the same translation unit.
600 if (FD->isMSVCRTEntryPoint())
601 return false;
602
603 // C++ functions and those whose names are not a simple identifier need
604 // mangling.
605 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
606 return true;
607
608 // C functions are not mangled.
609 if (L == CLanguageLinkage)
610 return false;
611 }
612
613 // Otherwise, no mangling is done outside C++ mode.
614 if (!getASTContext().getLangOpts().CPlusPlus)
615 return false;
616
617 const VarDecl *VD = dyn_cast<VarDecl>(D);
618 if (VD && !isa<DecompositionDecl>(D)) {
619 // C variables are not mangled.
620 if (VD->isExternC())
621 return false;
622
623 // Variables at global scope with non-internal linkage are not mangled
624 const DeclContext *DC = getEffectiveDeclContext(D);
625 // Check for extern variable declared locally.
626 if (DC->isFunctionOrMethod() && D->hasLinkage())
627 while (!DC->isNamespace() && !DC->isTranslationUnit())
628 DC = getEffectiveParentContext(DC);
629 if (DC->isTranslationUnit() && D->getFormalLinkage() != InternalLinkage &&
630 !CXXNameMangler::shouldHaveAbiTags(*this, VD) &&
631 !isa<VarTemplateSpecializationDecl>(D))
632 return false;
633 }
634
635 return true;
636}
637
638void CXXNameMangler::writeAbiTags(const NamedDecl *ND,
639 const AbiTagList *AdditionalAbiTags) {
640 assert(AbiTags && "require AbiTagState")((AbiTags && "require AbiTagState") ? static_cast<
void> (0) : __assert_fail ("AbiTags && \"require AbiTagState\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 640, __PRETTY_FUNCTION__))
;
13
Assuming field 'AbiTags' is non-null
14
'?' condition is true
641 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'
642}
643
644void CXXNameMangler::mangleSourceNameWithAbiTags(
645 const NamedDecl *ND, const AbiTagList *AdditionalAbiTags) {
646 mangleSourceName(ND->getIdentifier());
647 writeAbiTags(ND, AdditionalAbiTags);
648}
649
650void CXXNameMangler::mangle(GlobalDecl GD) {
651 // <mangled-name> ::= _Z <encoding>
652 // ::= <data name>
653 // ::= <special-name>
654 Out << "_Z";
655 if (isa<FunctionDecl>(GD.getDecl()))
656 mangleFunctionEncoding(GD);
657 else if (isa<VarDecl, FieldDecl, MSGuidDecl, TemplateParamObjectDecl,
658 BindingDecl>(GD.getDecl()))
659 mangleName(GD);
660 else if (const IndirectFieldDecl *IFD =
661 dyn_cast<IndirectFieldDecl>(GD.getDecl()))
662 mangleName(IFD->getAnonField());
663 else
664 llvm_unreachable("unexpected kind of global decl")::llvm::llvm_unreachable_internal("unexpected kind of global decl"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 664)
;
665}
666
667void CXXNameMangler::mangleFunctionEncoding(GlobalDecl GD) {
668 const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl());
669 // <encoding> ::= <function name> <bare-function-type>
670
671 // Don't mangle in the type if this isn't a decl we should typically mangle.
672 if (!Context.shouldMangleDeclName(FD)) {
673 mangleName(GD);
674 return;
675 }
676
677 AbiTagList ReturnTypeAbiTags = makeFunctionReturnTypeTags(FD);
678 if (ReturnTypeAbiTags.empty()) {
679 // There are no tags for return type, the simplest case.
680 mangleName(GD);
681 mangleFunctionEncodingBareType(FD);
682 return;
683 }
684
685 // Mangle function name and encoding to temporary buffer.
686 // We have to output name and encoding to the same mangler to get the same
687 // substitution as it will be in final mangling.
688 SmallString<256> FunctionEncodingBuf;
689 llvm::raw_svector_ostream FunctionEncodingStream(FunctionEncodingBuf);
690 CXXNameMangler FunctionEncodingMangler(*this, FunctionEncodingStream);
691 // Output name of the function.
692 FunctionEncodingMangler.disableDerivedAbiTags();
693 FunctionEncodingMangler.mangleNameWithAbiTags(FD, nullptr);
694
695 // Remember length of the function name in the buffer.
696 size_t EncodingPositionStart = FunctionEncodingStream.str().size();
697 FunctionEncodingMangler.mangleFunctionEncodingBareType(FD);
698
699 // Get tags from return type that are not present in function name or
700 // encoding.
701 const AbiTagList &UsedAbiTags =
702 FunctionEncodingMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
703 AbiTagList AdditionalAbiTags(ReturnTypeAbiTags.size());
704 AdditionalAbiTags.erase(
705 std::set_difference(ReturnTypeAbiTags.begin(), ReturnTypeAbiTags.end(),
706 UsedAbiTags.begin(), UsedAbiTags.end(),
707 AdditionalAbiTags.begin()),
708 AdditionalAbiTags.end());
709
710 // Output name with implicit tags and function encoding from temporary buffer.
711 mangleNameWithAbiTags(FD, &AdditionalAbiTags);
712 Out << FunctionEncodingStream.str().substr(EncodingPositionStart);
713
714 // Function encoding could create new substitutions so we have to add
715 // temp mangled substitutions to main mangler.
716 extendSubstitutions(&FunctionEncodingMangler);
717}
718
719void CXXNameMangler::mangleFunctionEncodingBareType(const FunctionDecl *FD) {
720 if (FD->hasAttr<EnableIfAttr>()) {
721 FunctionTypeDepthState Saved = FunctionTypeDepth.push();
722 Out << "Ua9enable_ifI";
723 for (AttrVec::const_iterator I = FD->getAttrs().begin(),
724 E = FD->getAttrs().end();
725 I != E; ++I) {
726 EnableIfAttr *EIA = dyn_cast<EnableIfAttr>(*I);
727 if (!EIA)
728 continue;
729 Out << 'X';
730 mangleExpression(EIA->getCond());
731 Out << 'E';
732 }
733 Out << 'E';
734 FunctionTypeDepth.pop(Saved);
735 }
736
737 // When mangling an inheriting constructor, the bare function type used is
738 // that of the inherited constructor.
739 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD))
740 if (auto Inherited = CD->getInheritedConstructor())
741 FD = Inherited.getConstructor();
742
743 // Whether the mangling of a function type includes the return type depends on
744 // the context and the nature of the function. The rules for deciding whether
745 // the return type is included are:
746 //
747 // 1. Template functions (names or types) have return types encoded, with
748 // the exceptions listed below.
749 // 2. Function types not appearing as part of a function name mangling,
750 // e.g. parameters, pointer types, etc., have return type encoded, with the
751 // exceptions listed below.
752 // 3. Non-template function names do not have return types encoded.
753 //
754 // The exceptions mentioned in (1) and (2) above, for which the return type is
755 // never included, are
756 // 1. Constructors.
757 // 2. Destructors.
758 // 3. Conversion operator functions, e.g. operator int.
759 bool MangleReturnType = false;
760 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) {
761 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) ||
762 isa<CXXConversionDecl>(FD)))
763 MangleReturnType = true;
764
765 // Mangle the type of the primary template.
766 FD = PrimaryTemplate->getTemplatedDecl();
767 }
768
769 mangleBareFunctionType(FD->getType()->castAs<FunctionProtoType>(),
770 MangleReturnType, FD);
771}
772
773static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) {
774 while (isa<LinkageSpecDecl>(DC)) {
775 DC = getEffectiveParentContext(DC);
776 }
777
778 return DC;
779}
780
781/// Return whether a given namespace is the 'std' namespace.
782static bool isStd(const NamespaceDecl *NS) {
783 if (!IgnoreLinkageSpecDecls(getEffectiveParentContext(NS))
784 ->isTranslationUnit())
785 return false;
786
787 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier();
788 return II && II->isStr("std");
789}
790
791// isStdNamespace - Return whether a given decl context is a toplevel 'std'
792// namespace.
793static bool isStdNamespace(const DeclContext *DC) {
794 if (!DC->isNamespace())
795 return false;
796
797 return isStd(cast<NamespaceDecl>(DC));
798}
799
800static const GlobalDecl
801isTemplate(GlobalDecl GD, const TemplateArgumentList *&TemplateArgs) {
802 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
803 // Check if we have a function template.
804 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
805 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
806 TemplateArgs = FD->getTemplateSpecializationArgs();
807 return GD.getWithDecl(TD);
808 }
809 }
810
811 // Check if we have a class template.
812 if (const ClassTemplateSpecializationDecl *Spec =
813 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
814 TemplateArgs = &Spec->getTemplateArgs();
815 return GD.getWithDecl(Spec->getSpecializedTemplate());
816 }
817
818 // Check if we have a variable template.
819 if (const VarTemplateSpecializationDecl *Spec =
820 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
821 TemplateArgs = &Spec->getTemplateArgs();
822 return GD.getWithDecl(Spec->getSpecializedTemplate());
823 }
824
825 return GlobalDecl();
826}
827
828static TemplateName asTemplateName(GlobalDecl GD) {
829 const TemplateDecl *TD = dyn_cast_or_null<TemplateDecl>(GD.getDecl());
830 return TemplateName(const_cast<TemplateDecl*>(TD));
831}
832
833void CXXNameMangler::mangleName(GlobalDecl GD) {
834 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
835 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
836 // Variables should have implicit tags from its type.
837 AbiTagList VariableTypeAbiTags = makeVariableTypeTags(VD);
838 if (VariableTypeAbiTags.empty()) {
839 // Simple case no variable type tags.
840 mangleNameWithAbiTags(VD, nullptr);
841 return;
842 }
843
844 // Mangle variable name to null stream to collect tags.
845 llvm::raw_null_ostream NullOutStream;
846 CXXNameMangler VariableNameMangler(*this, NullOutStream);
847 VariableNameMangler.disableDerivedAbiTags();
848 VariableNameMangler.mangleNameWithAbiTags(VD, nullptr);
849
850 // Get tags from variable type that are not present in its name.
851 const AbiTagList &UsedAbiTags =
852 VariableNameMangler.AbiTagsRoot.getSortedUniqueUsedAbiTags();
853 AbiTagList AdditionalAbiTags(VariableTypeAbiTags.size());
854 AdditionalAbiTags.erase(
855 std::set_difference(VariableTypeAbiTags.begin(),
856 VariableTypeAbiTags.end(), UsedAbiTags.begin(),
857 UsedAbiTags.end(), AdditionalAbiTags.begin()),
858 AdditionalAbiTags.end());
859
860 // Output name with implicit tags.
861 mangleNameWithAbiTags(VD, &AdditionalAbiTags);
862 } else {
863 mangleNameWithAbiTags(GD, nullptr);
864 }
865}
866
867void CXXNameMangler::mangleNameWithAbiTags(GlobalDecl GD,
868 const AbiTagList *AdditionalAbiTags) {
869 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
870 // <name> ::= [<module-name>] <nested-name>
871 // ::= [<module-name>] <unscoped-name>
872 // ::= [<module-name>] <unscoped-template-name> <template-args>
873 // ::= <local-name>
874 //
875 const DeclContext *DC = getEffectiveDeclContext(ND);
876
877 // If this is an extern variable declared locally, the relevant DeclContext
878 // is that of the containing namespace, or the translation unit.
879 // FIXME: This is a hack; extern variables declared locally should have
880 // a proper semantic declaration context!
881 if (isLocalContainerContext(DC) && ND->hasLinkage() && !isLambda(ND))
882 while (!DC->isNamespace() && !DC->isTranslationUnit())
883 DC = getEffectiveParentContext(DC);
884 else if (GetLocalClassDecl(ND)) {
885 mangleLocalName(GD, AdditionalAbiTags);
886 return;
887 }
888
889 DC = IgnoreLinkageSpecDecls(DC);
890
891 if (isLocalContainerContext(DC)) {
892 mangleLocalName(GD, AdditionalAbiTags);
893 return;
894 }
895
896 // Do not mangle the owning module for an external linkage declaration.
897 // This enables backwards-compatibility with non-modular code, and is
898 // a valid choice since conflicts are not permitted by C++ Modules TS
899 // [basic.def.odr]/6.2.
900 if (!ND->hasExternalFormalLinkage())
901 if (Module *M = ND->getOwningModuleForLinkage())
902 mangleModuleName(M);
903
904 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
905 // Check if we have a template.
906 const TemplateArgumentList *TemplateArgs = nullptr;
907 if (GlobalDecl TD = isTemplate(GD, TemplateArgs)) {
908 mangleUnscopedTemplateName(TD, AdditionalAbiTags);
909 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
910 return;
911 }
912
913 mangleUnscopedName(GD, AdditionalAbiTags);
914 return;
915 }
916
917 mangleNestedName(GD, DC, AdditionalAbiTags);
918}
919
920void CXXNameMangler::mangleModuleName(const Module *M) {
921 // Implement the C++ Modules TS name mangling proposal; see
922 // https://gcc.gnu.org/wiki/cxx-modules?action=AttachFile
923 //
924 // <module-name> ::= W <unscoped-name>+ E
925 // ::= W <module-subst> <unscoped-name>* E
926 Out << 'W';
927 mangleModuleNamePrefix(M->Name);
928 Out << 'E';
929}
930
931void CXXNameMangler::mangleModuleNamePrefix(StringRef Name) {
932 // <module-subst> ::= _ <seq-id> # 0 < seq-id < 10
933 // ::= W <seq-id - 10> _ # otherwise
934 auto It = ModuleSubstitutions.find(Name);
935 if (It != ModuleSubstitutions.end()) {
936 if (It->second < 10)
937 Out << '_' << static_cast<char>('0' + It->second);
938 else
939 Out << 'W' << (It->second - 10) << '_';
940 return;
941 }
942
943 // FIXME: Preserve hierarchy in module names rather than flattening
944 // them to strings; use Module*s as substitution keys.
945 auto Parts = Name.rsplit('.');
946 if (Parts.second.empty())
947 Parts.second = Parts.first;
948 else
949 mangleModuleNamePrefix(Parts.first);
950
951 Out << Parts.second.size() << Parts.second;
952 ModuleSubstitutions.insert({Name, ModuleSubstitutions.size()});
953}
954
955void CXXNameMangler::mangleTemplateName(const TemplateDecl *TD,
956 const TemplateArgument *TemplateArgs,
957 unsigned NumTemplateArgs) {
958 const DeclContext *DC = IgnoreLinkageSpecDecls(getEffectiveDeclContext(TD));
959
960 if (DC->isTranslationUnit() || isStdNamespace(DC)) {
961 mangleUnscopedTemplateName(TD, nullptr);
962 mangleTemplateArgs(asTemplateName(TD), TemplateArgs, NumTemplateArgs);
963 } else {
964 mangleNestedName(TD, TemplateArgs, NumTemplateArgs);
965 }
966}
967
968void CXXNameMangler::mangleUnscopedName(GlobalDecl GD,
969 const AbiTagList *AdditionalAbiTags) {
970 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
971 // <unscoped-name> ::= <unqualified-name>
972 // ::= St <unqualified-name> # ::std::
973
974 if (isStdNamespace(IgnoreLinkageSpecDecls(getEffectiveDeclContext(ND))))
975 Out << "St";
976
977 mangleUnqualifiedName(GD, AdditionalAbiTags);
978}
979
980void CXXNameMangler::mangleUnscopedTemplateName(
981 GlobalDecl GD, const AbiTagList *AdditionalAbiTags) {
982 const TemplateDecl *ND = cast<TemplateDecl>(GD.getDecl());
983 // <unscoped-template-name> ::= <unscoped-name>
984 // ::= <substitution>
985 if (mangleSubstitution(ND))
986 return;
987
988 // <template-template-param> ::= <template-param>
989 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
990 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 991, __PRETTY_FUNCTION__))
991 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 991, __PRETTY_FUNCTION__))
;
992 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
993 } else if (isa<BuiltinTemplateDecl>(ND) || isa<ConceptDecl>(ND)) {
994 mangleUnscopedName(GD, AdditionalAbiTags);
995 } else {
996 mangleUnscopedName(GD.getWithDecl(ND->getTemplatedDecl()), AdditionalAbiTags);
997 }
998
999 addSubstitution(ND);
1000}
1001
1002void CXXNameMangler::mangleFloat(const llvm::APFloat &f) {
1003 // ABI:
1004 // Floating-point literals are encoded using a fixed-length
1005 // lowercase hexadecimal string corresponding to the internal
1006 // representation (IEEE on Itanium), high-order bytes first,
1007 // without leading zeroes. For example: "Lf bf800000 E" is -1.0f
1008 // on Itanium.
1009 // The 'without leading zeroes' thing seems to be an editorial
1010 // mistake; see the discussion on cxx-abi-dev beginning on
1011 // 2012-01-16.
1012
1013 // Our requirements here are just barely weird enough to justify
1014 // using a custom algorithm instead of post-processing APInt::toString().
1015
1016 llvm::APInt valueBits = f.bitcastToAPInt();
1017 unsigned numCharacters = (valueBits.getBitWidth() + 3) / 4;
1018 assert(numCharacters != 0)((numCharacters != 0) ? static_cast<void> (0) : __assert_fail
("numCharacters != 0", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1018, __PRETTY_FUNCTION__))
;
1019
1020 // Allocate a buffer of the right number of characters.
1021 SmallVector<char, 20> buffer(numCharacters);
1022
1023 // Fill the buffer left-to-right.
1024 for (unsigned stringIndex = 0; stringIndex != numCharacters; ++stringIndex) {
1025 // The bit-index of the next hex digit.
1026 unsigned digitBitIndex = 4 * (numCharacters - stringIndex - 1);
1027
1028 // Project out 4 bits starting at 'digitIndex'.
1029 uint64_t hexDigit = valueBits.getRawData()[digitBitIndex / 64];
1030 hexDigit >>= (digitBitIndex % 64);
1031 hexDigit &= 0xF;
1032
1033 // Map that over to a lowercase hex digit.
1034 static const char charForHex[16] = {
1035 '0', '1', '2', '3', '4', '5', '6', '7',
1036 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
1037 };
1038 buffer[stringIndex] = charForHex[hexDigit];
1039 }
1040
1041 Out.write(buffer.data(), numCharacters);
1042}
1043
1044void CXXNameMangler::mangleFloatLiteral(QualType T, const llvm::APFloat &V) {
1045 Out << 'L';
1046 mangleType(T);
1047 mangleFloat(V);
1048 Out << 'E';
1049}
1050
1051void CXXNameMangler::mangleFixedPointLiteral() {
1052 DiagnosticsEngine &Diags = Context.getDiags();
1053 unsigned DiagID = Diags.getCustomDiagID(
1054 DiagnosticsEngine::Error, "cannot mangle fixed point literals yet");
1055 Diags.Report(DiagID);
1056}
1057
1058void CXXNameMangler::mangleNullPointer(QualType T) {
1059 // <expr-primary> ::= L <type> 0 E
1060 Out << 'L';
1061 mangleType(T);
1062 Out << "0E";
1063}
1064
1065void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) {
1066 if (Value.isSigned() && Value.isNegative()) {
1067 Out << 'n';
1068 Value.abs().print(Out, /*signed*/ false);
1069 } else {
1070 Value.print(Out, /*signed*/ false);
1071 }
1072}
1073
1074void CXXNameMangler::mangleNumber(int64_t Number) {
1075 // <number> ::= [n] <non-negative decimal integer>
1076 if (Number < 0) {
1077 Out << 'n';
1078 Number = -Number;
1079 }
1080
1081 Out << Number;
1082}
1083
1084void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) {
1085 // <call-offset> ::= h <nv-offset> _
1086 // ::= v <v-offset> _
1087 // <nv-offset> ::= <offset number> # non-virtual base override
1088 // <v-offset> ::= <offset number> _ <virtual offset number>
1089 // # virtual base override, with vcall offset
1090 if (!Virtual) {
1091 Out << 'h';
1092 mangleNumber(NonVirtual);
1093 Out << '_';
1094 return;
1095 }
1096
1097 Out << 'v';
1098 mangleNumber(NonVirtual);
1099 Out << '_';
1100 mangleNumber(Virtual);
1101 Out << '_';
1102}
1103
1104void CXXNameMangler::manglePrefix(QualType type) {
1105 if (const auto *TST = type->getAs<TemplateSpecializationType>()) {
1106 if (!mangleSubstitution(QualType(TST, 0))) {
1107 mangleTemplatePrefix(TST->getTemplateName());
1108
1109 // FIXME: GCC does not appear to mangle the template arguments when
1110 // the template in question is a dependent template name. Should we
1111 // emulate that badness?
1112 mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(),
1113 TST->getNumArgs());
1114 addSubstitution(QualType(TST, 0));
1115 }
1116 } else if (const auto *DTST =
1117 type->getAs<DependentTemplateSpecializationType>()) {
1118 if (!mangleSubstitution(QualType(DTST, 0))) {
1119 TemplateName Template = getASTContext().getDependentTemplateName(
1120 DTST->getQualifier(), DTST->getIdentifier());
1121 mangleTemplatePrefix(Template);
1122
1123 // FIXME: GCC does not appear to mangle the template arguments when
1124 // the template in question is a dependent template name. Should we
1125 // emulate that badness?
1126 mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs());
1127 addSubstitution(QualType(DTST, 0));
1128 }
1129 } else {
1130 // We use the QualType mangle type variant here because it handles
1131 // substitutions.
1132 mangleType(type);
1133 }
1134}
1135
1136/// Mangle everything prior to the base-unresolved-name in an unresolved-name.
1137///
1138/// \param recursive - true if this is being called recursively,
1139/// i.e. if there is more prefix "to the right".
1140void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
1141 bool recursive) {
1142
1143 // x, ::x
1144 // <unresolved-name> ::= [gs] <base-unresolved-name>
1145
1146 // T::x / decltype(p)::x
1147 // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name>
1148
1149 // T::N::x /decltype(p)::N::x
1150 // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
1151 // <base-unresolved-name>
1152
1153 // A::x, N::y, A<T>::z; "gs" means leading "::"
1154 // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E
1155 // <base-unresolved-name>
1156
1157 switch (qualifier->getKind()) {
1158 case NestedNameSpecifier::Global:
1159 Out << "gs";
1160
1161 // We want an 'sr' unless this is the entire NNS.
1162 if (recursive)
1163 Out << "sr";
1164
1165 // We never want an 'E' here.
1166 return;
1167
1168 case NestedNameSpecifier::Super:
1169 llvm_unreachable("Can't mangle __super specifier")::llvm::llvm_unreachable_internal("Can't mangle __super specifier"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1169)
;
1170
1171 case NestedNameSpecifier::Namespace:
1172 if (qualifier->getPrefix())
1173 mangleUnresolvedPrefix(qualifier->getPrefix(),
1174 /*recursive*/ true);
1175 else
1176 Out << "sr";
1177 mangleSourceNameWithAbiTags(qualifier->getAsNamespace());
1178 break;
1179 case NestedNameSpecifier::NamespaceAlias:
1180 if (qualifier->getPrefix())
1181 mangleUnresolvedPrefix(qualifier->getPrefix(),
1182 /*recursive*/ true);
1183 else
1184 Out << "sr";
1185 mangleSourceNameWithAbiTags(qualifier->getAsNamespaceAlias());
1186 break;
1187
1188 case NestedNameSpecifier::TypeSpec:
1189 case NestedNameSpecifier::TypeSpecWithTemplate: {
1190 const Type *type = qualifier->getAsType();
1191
1192 // We only want to use an unresolved-type encoding if this is one of:
1193 // - a decltype
1194 // - a template type parameter
1195 // - a template template parameter with arguments
1196 // In all of these cases, we should have no prefix.
1197 if (qualifier->getPrefix()) {
1198 mangleUnresolvedPrefix(qualifier->getPrefix(),
1199 /*recursive*/ true);
1200 } else {
1201 // Otherwise, all the cases want this.
1202 Out << "sr";
1203 }
1204
1205 if (mangleUnresolvedTypeOrSimpleId(QualType(type, 0), recursive ? "N" : ""))
1206 return;
1207
1208 break;
1209 }
1210
1211 case NestedNameSpecifier::Identifier:
1212 // Member expressions can have these without prefixes.
1213 if (qualifier->getPrefix())
1214 mangleUnresolvedPrefix(qualifier->getPrefix(),
1215 /*recursive*/ true);
1216 else
1217 Out << "sr";
1218
1219 mangleSourceName(qualifier->getAsIdentifier());
1220 // An Identifier has no type information, so we can't emit abi tags for it.
1221 break;
1222 }
1223
1224 // If this was the innermost part of the NNS, and we fell out to
1225 // here, append an 'E'.
1226 if (!recursive)
1227 Out << 'E';
1228}
1229
1230/// Mangle an unresolved-name, which is generally used for names which
1231/// weren't resolved to specific entities.
1232void CXXNameMangler::mangleUnresolvedName(
1233 NestedNameSpecifier *qualifier, DeclarationName name,
1234 const TemplateArgumentLoc *TemplateArgs, unsigned NumTemplateArgs,
1235 unsigned knownArity) {
1236 if (qualifier) mangleUnresolvedPrefix(qualifier);
1237 switch (name.getNameKind()) {
1238 // <base-unresolved-name> ::= <simple-id>
1239 case DeclarationName::Identifier:
1240 mangleSourceName(name.getAsIdentifierInfo());
1241 break;
1242 // <base-unresolved-name> ::= dn <destructor-name>
1243 case DeclarationName::CXXDestructorName:
1244 Out << "dn";
1245 mangleUnresolvedTypeOrSimpleId(name.getCXXNameType());
1246 break;
1247 // <base-unresolved-name> ::= on <operator-name>
1248 case DeclarationName::CXXConversionFunctionName:
1249 case DeclarationName::CXXLiteralOperatorName:
1250 case DeclarationName::CXXOperatorName:
1251 Out << "on";
1252 mangleOperatorName(name, knownArity);
1253 break;
1254 case DeclarationName::CXXConstructorName:
1255 llvm_unreachable("Can't mangle a constructor name!")::llvm::llvm_unreachable_internal("Can't mangle a constructor name!"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1255)
;
1256 case DeclarationName::CXXUsingDirective:
1257 llvm_unreachable("Can't mangle a using directive name!")::llvm::llvm_unreachable_internal("Can't mangle a using directive name!"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1257)
;
1258 case DeclarationName::CXXDeductionGuideName:
1259 llvm_unreachable("Can't mangle a deduction guide name!")::llvm::llvm_unreachable_internal("Can't mangle a deduction guide name!"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1259)
;
1260 case DeclarationName::ObjCMultiArgSelector:
1261 case DeclarationName::ObjCOneArgSelector:
1262 case DeclarationName::ObjCZeroArgSelector:
1263 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1263)
;
1264 }
1265
1266 // The <simple-id> and on <operator-name> productions end in an optional
1267 // <template-args>.
1268 if (TemplateArgs)
1269 mangleTemplateArgs(TemplateName(), TemplateArgs, NumTemplateArgs);
1270}
1271
1272void CXXNameMangler::mangleUnqualifiedName(GlobalDecl GD,
1273 DeclarationName Name,
1274 unsigned KnownArity,
1275 const AbiTagList *AdditionalAbiTags) {
1276 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
1277 unsigned Arity = KnownArity;
1278 // <unqualified-name> ::= <operator-name>
1279 // ::= <ctor-dtor-name>
1280 // ::= <source-name>
1281 switch (Name.getNameKind()) {
3
Calling 'DeclarationName::getNameKind'
7
Returning from 'DeclarationName::getNameKind'
8
Control jumps to 'case CXXDestructorName:' at line 1497
1282 case DeclarationName::Identifier: {
1283 const IdentifierInfo *II = Name.getAsIdentifierInfo();
1284
1285 // We mangle decomposition declarations as the names of their bindings.
1286 if (auto *DD = dyn_cast<DecompositionDecl>(ND)) {
1287 // FIXME: Non-standard mangling for decomposition declarations:
1288 //
1289 // <unqualified-name> ::= DC <source-name>* E
1290 //
1291 // These can never be referenced across translation units, so we do
1292 // not need a cross-vendor mangling for anything other than demanglers.
1293 // Proposed on cxx-abi-dev on 2016-08-12
1294 Out << "DC";
1295 for (auto *BD : DD->bindings())
1296 mangleSourceName(BD->getDeclName().getAsIdentifierInfo());
1297 Out << 'E';
1298 writeAbiTags(ND, AdditionalAbiTags);
1299 break;
1300 }
1301
1302 if (auto *GD = dyn_cast<MSGuidDecl>(ND)) {
1303 // We follow MSVC in mangling GUID declarations as if they were variables
1304 // with a particular reserved name. Continue the pretense here.
1305 SmallString<sizeof("_GUID_12345678_1234_1234_1234_1234567890ab")> GUID;
1306 llvm::raw_svector_ostream GUIDOS(GUID);
1307 Context.mangleMSGuidDecl(GD, GUIDOS);
1308 Out << GUID.size() << GUID;
1309 break;
1310 }
1311
1312 if (auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
1313 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/63.
1314 Out << "TA";
1315 mangleValueInTemplateArg(TPO->getType().getUnqualifiedType(),
1316 TPO->getValue(), /*TopLevel=*/true);
1317 break;
1318 }
1319
1320 if (II) {
1321 // Match GCC's naming convention for internal linkage symbols, for
1322 // symbols that are not actually visible outside of this TU. GCC
1323 // distinguishes between internal and external linkage symbols in
1324 // its mangling, to support cases like this that were valid C++ prior
1325 // to DR426:
1326 //
1327 // void test() { extern void foo(); }
1328 // static void foo();
1329 //
1330 // Don't bother with the L marker for names in anonymous namespaces; the
1331 // 12_GLOBAL__N_1 mangling is quite sufficient there, and this better
1332 // matches GCC anyway, because GCC does not treat anonymous namespaces as
1333 // implying internal linkage.
1334 if (ND && ND->getFormalLinkage() == InternalLinkage &&
1335 !ND->isExternallyVisible() &&
1336 getEffectiveDeclContext(ND)->isFileContext() &&
1337 !ND->isInAnonymousNamespace())
1338 Out << 'L';
1339
1340 auto *FD = dyn_cast<FunctionDecl>(ND);
1341 bool IsRegCall = FD &&
1342 FD->getType()->castAs<FunctionType>()->getCallConv() ==
1343 clang::CC_X86RegCall;
1344 bool IsDeviceStub =
1345 FD && FD->hasAttr<CUDAGlobalAttr>() &&
1346 GD.getKernelReferenceKind() == KernelReferenceKind::Stub;
1347 if (IsDeviceStub)
1348 mangleDeviceStubName(II);
1349 else if (IsRegCall)
1350 mangleRegCallName(II);
1351 else
1352 mangleSourceName(II);
1353
1354 writeAbiTags(ND, AdditionalAbiTags);
1355 break;
1356 }
1357
1358 // Otherwise, an anonymous entity. We must have a declaration.
1359 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1359, __PRETTY_FUNCTION__))
;
1360
1361 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
1362 if (NS->isAnonymousNamespace()) {
1363 // This is how gcc mangles these names.
1364 Out << "12_GLOBAL__N_1";
1365 break;
1366 }
1367 }
1368
1369 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
1370 // We must have an anonymous union or struct declaration.
1371 const RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
1372
1373 // Itanium C++ ABI 5.1.2:
1374 //
1375 // For the purposes of mangling, the name of an anonymous union is
1376 // considered to be the name of the first named data member found by a
1377 // pre-order, depth-first, declaration-order walk of the data members of
1378 // the anonymous union. If there is no such data member (i.e., if all of
1379 // the data members in the union are unnamed), then there is no way for
1380 // a program to refer to the anonymous union, and there is therefore no
1381 // need to mangle its name.
1382 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1383, __PRETTY_FUNCTION__))
1383 && "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1383, __PRETTY_FUNCTION__))
;
1384 const FieldDecl *FD = RD->findFirstNamedDataMember();
1385
1386 // It's actually possible for various reasons for us to get here
1387 // with an empty anonymous struct / union. Fortunately, it
1388 // doesn't really matter what name we generate.
1389 if (!FD) break;
1390 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1390, __PRETTY_FUNCTION__))
;
1391
1392 mangleSourceName(FD->getIdentifier());
1393 // Not emitting abi tags: internal name anyway.
1394 break;
1395 }
1396
1397 // Class extensions have no name as a category, and it's possible
1398 // for them to be the semantic parent of certain declarations
1399 // (primarily, tag decls defined within declarations). Such
1400 // declarations will always have internal linkage, so the name
1401 // doesn't really matter, but we shouldn't crash on them. For
1402 // safety, just handle all ObjC containers here.
1403 if (isa<ObjCContainerDecl>(ND))
1404 break;
1405
1406 // We must have an anonymous struct.
1407 const TagDecl *TD = cast<TagDecl>(ND);
1408 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
1409 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1410, __PRETTY_FUNCTION__))
1410 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1410, __PRETTY_FUNCTION__))
;
1411 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1412, __PRETTY_FUNCTION__))
1412 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1412, __PRETTY_FUNCTION__))
;
1413 mangleSourceName(D->getDeclName().getAsIdentifierInfo());
1414 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1414, __PRETTY_FUNCTION__))
;
1415 // Explicit abi tags are still possible; take from underlying type, not
1416 // from typedef.
1417 writeAbiTags(TD, nullptr);
1418 break;
1419 }
1420
1421 // <unnamed-type-name> ::= <closure-type-name>
1422 //
1423 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
1424 // <lambda-sig> ::= <template-param-decl>* <parameter-type>+
1425 // # Parameter types or 'v' for 'void'.
1426 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
1427 if (Record->isLambda() && Record->getLambdaManglingNumber()) {
1428 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1429, __PRETTY_FUNCTION__))
1429 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1429, __PRETTY_FUNCTION__))
;
1430 mangleLambda(Record);
1431 break;
1432 }
1433 }
1434
1435 if (TD->isExternallyVisible()) {
1436 unsigned UnnamedMangle = getASTContext().getManglingNumber(TD);
1437 Out << "Ut";
1438 if (UnnamedMangle > 1)
1439 Out << UnnamedMangle - 2;
1440 Out << '_';
1441 writeAbiTags(TD, AdditionalAbiTags);
1442 break;
1443 }
1444
1445 // Get a unique id for the anonymous struct. If it is not a real output
1446 // ID doesn't matter so use fake one.
1447 unsigned AnonStructId = NullOut ? 0 : Context.getAnonymousStructId(TD);
1448
1449 // Mangle it as a source name in the form
1450 // [n] $_<id>
1451 // where n is the length of the string.
1452 SmallString<8> Str;
1453 Str += "$_";
1454 Str += llvm::utostr(AnonStructId);
1455
1456 Out << Str.size();
1457 Out << Str;
1458 break;
1459 }
1460
1461 case DeclarationName::ObjCZeroArgSelector:
1462 case DeclarationName::ObjCOneArgSelector:
1463 case DeclarationName::ObjCMultiArgSelector:
1464 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1464)
;
1465
1466 case DeclarationName::CXXConstructorName: {
1467 const CXXRecordDecl *InheritedFrom = nullptr;
1468 TemplateName InheritedTemplateName;
1469 const TemplateArgumentList *InheritedTemplateArgs = nullptr;
1470 if (auto Inherited =
1471 cast<CXXConstructorDecl>(ND)->getInheritedConstructor()) {
1472 InheritedFrom = Inherited.getConstructor()->getParent();
1473 InheritedTemplateName =
1474 TemplateName(Inherited.getConstructor()->getPrimaryTemplate());
1475 InheritedTemplateArgs =
1476 Inherited.getConstructor()->getTemplateSpecializationArgs();
1477 }
1478
1479 if (ND == Structor)
1480 // If the named decl is the C++ constructor we're mangling, use the type
1481 // we were given.
1482 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType), InheritedFrom);
1483 else
1484 // Otherwise, use the complete constructor name. This is relevant if a
1485 // class with a constructor is declared within a constructor.
1486 mangleCXXCtorType(Ctor_Complete, InheritedFrom);
1487
1488 // FIXME: The template arguments are part of the enclosing prefix or
1489 // nested-name, but it's more convenient to mangle them here.
1490 if (InheritedTemplateArgs)
1491 mangleTemplateArgs(InheritedTemplateName, *InheritedTemplateArgs);
1492
1493 writeAbiTags(ND, AdditionalAbiTags);
1494 break;
1495 }
1496
1497 case DeclarationName::CXXDestructorName:
1498 if (ND == Structor)
9
Assuming 'ND' is not equal to field 'Structor'
10
Taking false branch
1499 // If the named decl is the C++ destructor we're mangling, use the type we
1500 // were given.
1501 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
1502 else
1503 // Otherwise, use the complete destructor name. This is relevant if a
1504 // class with a destructor is declared within a destructor.
1505 mangleCXXDtorType(Dtor_Complete);
1506 writeAbiTags(ND, AdditionalAbiTags);
11
Passing null pointer value via 1st parameter 'ND'
12
Calling 'CXXNameMangler::writeAbiTags'
1507 break;
1508
1509 case DeclarationName::CXXOperatorName:
1510 if (ND && Arity == UnknownArity) {
1511 Arity = cast<FunctionDecl>(ND)->getNumParams();
1512
1513 // If we have a member function, we need to include the 'this' pointer.
1514 if (const auto *MD = dyn_cast<CXXMethodDecl>(ND))
1515 if (!MD->isStatic())
1516 Arity++;
1517 }
1518 LLVM_FALLTHROUGH[[gnu::fallthrough]];
1519 case DeclarationName::CXXConversionFunctionName:
1520 case DeclarationName::CXXLiteralOperatorName:
1521 mangleOperatorName(Name, Arity);
1522 writeAbiTags(ND, AdditionalAbiTags);
1523 break;
1524
1525 case DeclarationName::CXXDeductionGuideName:
1526 llvm_unreachable("Can't mangle a deduction guide name!")::llvm::llvm_unreachable_internal("Can't mangle a deduction guide name!"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1526)
;
1527
1528 case DeclarationName::CXXUsingDirective:
1529 llvm_unreachable("Can't mangle a using directive name!")::llvm::llvm_unreachable_internal("Can't mangle a using directive name!"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1529)
;
1530 }
1531}
1532
1533void CXXNameMangler::mangleRegCallName(const IdentifierInfo *II) {
1534 // <source-name> ::= <positive length number> __regcall3__ <identifier>
1535 // <number> ::= [n] <non-negative decimal integer>
1536 // <identifier> ::= <unqualified source code identifier>
1537 Out << II->getLength() + sizeof("__regcall3__") - 1 << "__regcall3__"
1538 << II->getName();
1539}
1540
1541void CXXNameMangler::mangleDeviceStubName(const IdentifierInfo *II) {
1542 // <source-name> ::= <positive length number> __device_stub__ <identifier>
1543 // <number> ::= [n] <non-negative decimal integer>
1544 // <identifier> ::= <unqualified source code identifier>
1545 Out << II->getLength() + sizeof("__device_stub__") - 1 << "__device_stub__"
1546 << II->getName();
1547}
1548
1549void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) {
1550 // <source-name> ::= <positive length number> <identifier>
1551 // <number> ::= [n] <non-negative decimal integer>
1552 // <identifier> ::= <unqualified source code identifier>
1553 Out << II->getLength() << II->getName();
1554}
1555
1556void CXXNameMangler::mangleNestedName(GlobalDecl GD,
1557 const DeclContext *DC,
1558 const AbiTagList *AdditionalAbiTags,
1559 bool NoFunction) {
1560 const NamedDecl *ND = cast<NamedDecl>(GD.getDecl());
1561 // <nested-name>
1562 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
1563 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
1564 // <template-args> E
1565
1566 Out << 'N';
1567 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) {
1568 Qualifiers MethodQuals = Method->getMethodQualifiers();
1569 // We do not consider restrict a distinguishing attribute for overloading
1570 // purposes so we must not mangle it.
1571 MethodQuals.removeRestrict();
1572 mangleQualifiers(MethodQuals);
1573 mangleRefQualifier(Method->getRefQualifier());
1574 }
1575
1576 // Check if we have a template.
1577 const TemplateArgumentList *TemplateArgs = nullptr;
1578 if (GlobalDecl TD = isTemplate(GD, TemplateArgs)) {
1579 mangleTemplatePrefix(TD, NoFunction);
1580 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
1581 }
1582 else {
1583 manglePrefix(DC, NoFunction);
1584 mangleUnqualifiedName(GD, AdditionalAbiTags);
1585 }
1586
1587 Out << 'E';
1588}
1589void CXXNameMangler::mangleNestedName(const TemplateDecl *TD,
1590 const TemplateArgument *TemplateArgs,
1591 unsigned NumTemplateArgs) {
1592 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
1593
1594 Out << 'N';
1595
1596 mangleTemplatePrefix(TD);
1597 mangleTemplateArgs(asTemplateName(TD), TemplateArgs, NumTemplateArgs);
1598
1599 Out << 'E';
1600}
1601
1602static GlobalDecl getParentOfLocalEntity(const DeclContext *DC) {
1603 GlobalDecl GD;
1604 // The Itanium spec says:
1605 // For entities in constructors and destructors, the mangling of the
1606 // complete object constructor or destructor is used as the base function
1607 // name, i.e. the C1 or D1 version.
1608 if (auto *CD = dyn_cast<CXXConstructorDecl>(DC))
1609 GD = GlobalDecl(CD, Ctor_Complete);
1610 else if (auto *DD = dyn_cast<CXXDestructorDecl>(DC))
1611 GD = GlobalDecl(DD, Dtor_Complete);
1612 else
1613 GD = GlobalDecl(cast<FunctionDecl>(DC));
1614 return GD;
1615}
1616
1617void CXXNameMangler::mangleLocalName(GlobalDecl GD,
1618 const AbiTagList *AdditionalAbiTags) {
1619 const Decl *D = GD.getDecl();
1620 // <local-name> := Z <function encoding> E <entity name> [<discriminator>]
1621 // := Z <function encoding> E s [<discriminator>]
1622 // <local-name> := Z <function encoding> E d [ <parameter number> ]
1623 // _ <entity name>
1624 // <discriminator> := _ <non-negative number>
1625 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1625, __PRETTY_FUNCTION__))
;
1626 const RecordDecl *RD = GetLocalClassDecl(D);
1627 const DeclContext *DC = getEffectiveDeclContext(RD ? RD : D);
1628
1629 Out << 'Z';
1630
1631 {
1632 AbiTagState LocalAbiTags(AbiTags);
1633
1634 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC))
1635 mangleObjCMethodName(MD);
1636 else if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC))
1637 mangleBlockForPrefix(BD);
1638 else
1639 mangleFunctionEncoding(getParentOfLocalEntity(DC));
1640
1641 // Implicit ABI tags (from namespace) are not available in the following
1642 // entity; reset to actually emitted tags, which are available.
1643 LocalAbiTags.setUsedAbiTags(LocalAbiTags.getEmittedAbiTags());
1644 }
1645
1646 Out << 'E';
1647
1648 // GCC 5.3.0 doesn't emit derived ABI tags for local names but that seems to
1649 // be a bug that is fixed in trunk.
1650
1651 if (RD) {
1652 // The parameter number is omitted for the last parameter, 0 for the
1653 // second-to-last parameter, 1 for the third-to-last parameter, etc. The
1654 // <entity name> will of course contain a <closure-type-name>: Its
1655 // numbering will be local to the particular argument in which it appears
1656 // -- other default arguments do not affect its encoding.
1657 const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD);
1658 if (CXXRD && CXXRD->isLambda()) {
1659 if (const ParmVarDecl *Parm
1660 = dyn_cast_or_null<ParmVarDecl>(CXXRD->getLambdaContextDecl())) {
1661 if (const FunctionDecl *Func
1662 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1663 Out << 'd';
1664 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1665 if (Num > 1)
1666 mangleNumber(Num - 2);
1667 Out << '_';
1668 }
1669 }
1670 }
1671
1672 // Mangle the name relative to the closest enclosing function.
1673 // equality ok because RD derived from ND above
1674 if (D == RD) {
1675 mangleUnqualifiedName(RD, AdditionalAbiTags);
1676 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1677 manglePrefix(getEffectiveDeclContext(BD), true /*NoFunction*/);
1678 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1678, __PRETTY_FUNCTION__))
;
1679 mangleUnqualifiedBlock(BD);
1680 } else {
1681 const NamedDecl *ND = cast<NamedDecl>(D);
1682 mangleNestedName(GD, getEffectiveDeclContext(ND), AdditionalAbiTags,
1683 true /*NoFunction*/);
1684 }
1685 } else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
1686 // Mangle a block in a default parameter; see above explanation for
1687 // lambdas.
1688 if (const ParmVarDecl *Parm
1689 = dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl())) {
1690 if (const FunctionDecl *Func
1691 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) {
1692 Out << 'd';
1693 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex();
1694 if (Num > 1)
1695 mangleNumber(Num - 2);
1696 Out << '_';
1697 }
1698 }
1699
1700 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1700, __PRETTY_FUNCTION__))
;
1701 mangleUnqualifiedBlock(BD);
1702 } else {
1703 mangleUnqualifiedName(GD, AdditionalAbiTags);
1704 }
1705
1706 if (const NamedDecl *ND = dyn_cast<NamedDecl>(RD ? RD : D)) {
1707 unsigned disc;
1708 if (Context.getNextDiscriminator(ND, disc)) {
1709 if (disc < 10)
1710 Out << '_' << disc;
1711 else
1712 Out << "__" << disc << '_';
1713 }
1714 }
1715}
1716
1717void CXXNameMangler::mangleBlockForPrefix(const BlockDecl *Block) {
1718 if (GetLocalClassDecl(Block)) {
1719 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1720 return;
1721 }
1722 const DeclContext *DC = getEffectiveDeclContext(Block);
1723 if (isLocalContainerContext(DC)) {
1724 mangleLocalName(Block, /* AdditionalAbiTags */ nullptr);
1725 return;
1726 }
1727 manglePrefix(getEffectiveDeclContext(Block));
1728 mangleUnqualifiedBlock(Block);
1729}
1730
1731void CXXNameMangler::mangleUnqualifiedBlock(const BlockDecl *Block) {
1732 if (Decl *Context = Block->getBlockManglingContextDecl()) {
1733 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1734 Context->getDeclContext()->isRecord()) {
1735 const auto *ND = cast<NamedDecl>(Context);
1736 if (ND->getIdentifier()) {
1737 mangleSourceNameWithAbiTags(ND);
1738 Out << 'M';
1739 }
1740 }
1741 }
1742
1743 // If we have a block mangling number, use it.
1744 unsigned Number = Block->getBlockManglingNumber();
1745 // Otherwise, just make up a number. It doesn't matter what it is because
1746 // the symbol in question isn't externally visible.
1747 if (!Number)
1748 Number = Context.getBlockId(Block, false);
1749 else {
1750 // Stored mangling numbers are 1-based.
1751 --Number;
1752 }
1753 Out << "Ub";
1754 if (Number > 0)
1755 Out << Number - 1;
1756 Out << '_';
1757}
1758
1759// <template-param-decl>
1760// ::= Ty # template type parameter
1761// ::= Tn <type> # template non-type parameter
1762// ::= Tt <template-param-decl>* E # template template parameter
1763// ::= Tp <template-param-decl> # template parameter pack
1764void CXXNameMangler::mangleTemplateParamDecl(const NamedDecl *Decl) {
1765 if (auto *Ty = dyn_cast<TemplateTypeParmDecl>(Decl)) {
1766 if (Ty->isParameterPack())
1767 Out << "Tp";
1768 Out << "Ty";
1769 } else if (auto *Tn = dyn_cast<NonTypeTemplateParmDecl>(Decl)) {
1770 if (Tn->isExpandedParameterPack()) {
1771 for (unsigned I = 0, N = Tn->getNumExpansionTypes(); I != N; ++I) {
1772 Out << "Tn";
1773 mangleType(Tn->getExpansionType(I));
1774 }
1775 } else {
1776 QualType T = Tn->getType();
1777 if (Tn->isParameterPack()) {
1778 Out << "Tp";
1779 if (auto *PackExpansion = T->getAs<PackExpansionType>())
1780 T = PackExpansion->getPattern();
1781 }
1782 Out << "Tn";
1783 mangleType(T);
1784 }
1785 } else if (auto *Tt = dyn_cast<TemplateTemplateParmDecl>(Decl)) {
1786 if (Tt->isExpandedParameterPack()) {
1787 for (unsigned I = 0, N = Tt->getNumExpansionTemplateParameters(); I != N;
1788 ++I) {
1789 Out << "Tt";
1790 for (auto *Param : *Tt->getExpansionTemplateParameters(I))
1791 mangleTemplateParamDecl(Param);
1792 Out << "E";
1793 }
1794 } else {
1795 if (Tt->isParameterPack())
1796 Out << "Tp";
1797 Out << "Tt";
1798 for (auto *Param : *Tt->getTemplateParameters())
1799 mangleTemplateParamDecl(Param);
1800 Out << "E";
1801 }
1802 }
1803}
1804
1805void CXXNameMangler::mangleLambda(const CXXRecordDecl *Lambda) {
1806 // If the context of a closure type is an initializer for a class member
1807 // (static or nonstatic), it is encoded in a qualified name with a final
1808 // <prefix> of the form:
1809 //
1810 // <data-member-prefix> := <member source-name> M
1811 //
1812 // Technically, the data-member-prefix is part of the <prefix>. However,
1813 // since a closure type will always be mangled with a prefix, it's easier
1814 // to emit that last part of the prefix here.
1815 if (Decl *Context = Lambda->getLambdaContextDecl()) {
1816 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
1817 !isa<ParmVarDecl>(Context)) {
1818 // FIXME: 'inline auto [a, b] = []{ return ... };' does not get a
1819 // reasonable mangling here.
1820 if (const IdentifierInfo *Name
1821 = cast<NamedDecl>(Context)->getIdentifier()) {
1822 mangleSourceName(Name);
1823 const TemplateArgumentList *TemplateArgs = nullptr;
1824 if (GlobalDecl TD = isTemplate(cast<NamedDecl>(Context), TemplateArgs))
1825 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
1826 Out << 'M';
1827 }
1828 }
1829 }
1830
1831 Out << "Ul";
1832 mangleLambdaSig(Lambda);
1833 Out << "E";
1834
1835 // The number is omitted for the first closure type with a given
1836 // <lambda-sig> in a given context; it is n-2 for the nth closure type
1837 // (in lexical order) with that same <lambda-sig> and context.
1838 //
1839 // The AST keeps track of the number for us.
1840 unsigned Number = Lambda->getLambdaManglingNumber();
1841 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1841, __PRETTY_FUNCTION__))
;
1842 if (Number > 1)
1843 mangleNumber(Number - 2);
1844 Out << '_';
1845}
1846
1847void CXXNameMangler::mangleLambdaSig(const CXXRecordDecl *Lambda) {
1848 for (auto *D : Lambda->getLambdaExplicitTemplateParameters())
1849 mangleTemplateParamDecl(D);
1850 auto *Proto =
1851 Lambda->getLambdaTypeInfo()->getType()->castAs<FunctionProtoType>();
1852 mangleBareFunctionType(Proto, /*MangleReturnType=*/false,
1853 Lambda->getLambdaStaticInvoker());
1854}
1855
1856void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) {
1857 switch (qualifier->getKind()) {
1858 case NestedNameSpecifier::Global:
1859 // nothing
1860 return;
1861
1862 case NestedNameSpecifier::Super:
1863 llvm_unreachable("Can't mangle __super specifier")::llvm::llvm_unreachable_internal("Can't mangle __super specifier"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1863)
;
1864
1865 case NestedNameSpecifier::Namespace:
1866 mangleName(qualifier->getAsNamespace());
1867 return;
1868
1869 case NestedNameSpecifier::NamespaceAlias:
1870 mangleName(qualifier->getAsNamespaceAlias()->getNamespace());
1871 return;
1872
1873 case NestedNameSpecifier::TypeSpec:
1874 case NestedNameSpecifier::TypeSpecWithTemplate:
1875 manglePrefix(QualType(qualifier->getAsType(), 0));
1876 return;
1877
1878 case NestedNameSpecifier::Identifier:
1879 // Member expressions can have these without prefixes, but that
1880 // should end up in mangleUnresolvedPrefix instead.
1881 assert(qualifier->getPrefix())((qualifier->getPrefix()) ? static_cast<void> (0) : __assert_fail
("qualifier->getPrefix()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1881, __PRETTY_FUNCTION__))
;
1882 manglePrefix(qualifier->getPrefix());
1883
1884 mangleSourceName(qualifier->getAsIdentifier());
1885 return;
1886 }
1887
1888 llvm_unreachable("unexpected nested name specifier")::llvm::llvm_unreachable_internal("unexpected nested name specifier"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1888)
;
1889}
1890
1891void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) {
1892 // <prefix> ::= <prefix> <unqualified-name>
1893 // ::= <template-prefix> <template-args>
1894 // ::= <template-param>
1895 // ::= # empty
1896 // ::= <substitution>
1897
1898 DC = IgnoreLinkageSpecDecls(DC);
1899
1900 if (DC->isTranslationUnit())
1901 return;
1902
1903 if (NoFunction && isLocalContainerContext(DC))
1904 return;
1905
1906 assert(!isLocalContainerContext(DC))((!isLocalContainerContext(DC)) ? static_cast<void> (0)
: __assert_fail ("!isLocalContainerContext(DC)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1906, __PRETTY_FUNCTION__))
;
1907
1908 const NamedDecl *ND = cast<NamedDecl>(DC);
1909 if (mangleSubstitution(ND))
1910 return;
1911
1912 // Check if we have a template.
1913 const TemplateArgumentList *TemplateArgs = nullptr;
1914 if (GlobalDecl TD = isTemplate(ND, TemplateArgs)) {
1915 mangleTemplatePrefix(TD);
1916 mangleTemplateArgs(asTemplateName(TD), *TemplateArgs);
1917 } else {
1918 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
1919 mangleUnqualifiedName(ND, nullptr);
1920 }
1921
1922 addSubstitution(ND);
1923}
1924
1925void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) {
1926 // <template-prefix> ::= <prefix> <template unqualified-name>
1927 // ::= <template-param>
1928 // ::= <substitution>
1929 if (TemplateDecl *TD = Template.getAsTemplateDecl())
1930 return mangleTemplatePrefix(TD);
1931
1932 DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
1933 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 1933, __PRETTY_FUNCTION__))
;
1934
1935 // Clang 11 and before mangled the substitution for a dependent template name
1936 // after already having emitted (a substitution for) the prefix.
1937 bool Clang11Compat = getASTContext().getLangOpts().getClangABICompat() <=
1938 LangOptions::ClangABI::Ver11;
1939 if (!Clang11Compat && mangleSubstitution(Template))
1940 return;
1941
1942 if (NestedNameSpecifier *Qualifier = Dependent->getQualifier())
1943 manglePrefix(Qualifier);
1944
1945 if (Clang11Compat && mangleSubstitution(Template))
1946 return;
1947
1948 if (const IdentifierInfo *Id = Dependent->getIdentifier())
1949 mangleSourceName(Id);
1950 else
1951 mangleOperatorName(Dependent->getOperator(), UnknownArity);
1952
1953 addSubstitution(Template);
1954}
1955
1956void CXXNameMangler::mangleTemplatePrefix(GlobalDecl GD,
1957 bool NoFunction) {
1958 const TemplateDecl *ND = cast<TemplateDecl>(GD.getDecl());
1959 // <template-prefix> ::= <prefix> <template unqualified-name>
1960 // ::= <template-param>
1961 // ::= <substitution>
1962 // <template-template-param> ::= <template-param>
1963 // <substitution>
1964
1965 if (mangleSubstitution(ND))
1966 return;
1967
1968 // <template-template-param> ::= <template-param>
1969 if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
1970 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
1971 } else {
1972 manglePrefix(getEffectiveDeclContext(ND), NoFunction);
1973 if (isa<BuiltinTemplateDecl>(ND) || isa<ConceptDecl>(ND))
1974 mangleUnqualifiedName(GD, nullptr);
1975 else
1976 mangleUnqualifiedName(GD.getWithDecl(ND->getTemplatedDecl()), nullptr);
1977 }
1978
1979 addSubstitution(ND);
1980}
1981
1982/// Mangles a template name under the production <type>. Required for
1983/// template template arguments.
1984/// <type> ::= <class-enum-type>
1985/// ::= <template-param>
1986/// ::= <substitution>
1987void CXXNameMangler::mangleType(TemplateName TN) {
1988 if (mangleSubstitution(TN))
1989 return;
1990
1991 TemplateDecl *TD = nullptr;
1992
1993 switch (TN.getKind()) {
1994 case TemplateName::QualifiedTemplate:
1995 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl();
1996 goto HaveDecl;
1997
1998 case TemplateName::Template:
1999 TD = TN.getAsTemplateDecl();
2000 goto HaveDecl;
2001
2002 HaveDecl:
2003 if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(TD))
2004 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
2005 else
2006 mangleName(TD);
2007 break;
2008
2009 case TemplateName::OverloadedTemplate:
2010 case TemplateName::AssumedTemplate:
2011 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2011)
;
2012
2013 case TemplateName::DependentTemplate: {
2014 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName();
2015 assert(Dependent->isIdentifier())((Dependent->isIdentifier()) ? static_cast<void> (0)
: __assert_fail ("Dependent->isIdentifier()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2015, __PRETTY_FUNCTION__))
;
2016
2017 // <class-enum-type> ::= <name>
2018 // <name> ::= <nested-name>
2019 mangleUnresolvedPrefix(Dependent->getQualifier());
2020 mangleSourceName(Dependent->getIdentifier());
2021 break;
2022 }
2023
2024 case TemplateName::SubstTemplateTemplateParm: {
2025 // Substituted template parameters are mangled as the substituted
2026 // template. This will check for the substitution twice, which is
2027 // fine, but we have to return early so that we don't try to *add*
2028 // the substitution twice.
2029 SubstTemplateTemplateParmStorage *subst
2030 = TN.getAsSubstTemplateTemplateParm();
2031 mangleType(subst->getReplacement());
2032 return;
2033 }
2034
2035 case TemplateName::SubstTemplateTemplateParmPack: {
2036 // FIXME: not clear how to mangle this!
2037 // template <template <class> class T...> class A {
2038 // template <template <class> class U...> void foo(B<T,U> x...);
2039 // };
2040 Out << "_SUBSTPACK_";
2041 break;
2042 }
2043 }
2044
2045 addSubstitution(TN);
2046}
2047
2048bool CXXNameMangler::mangleUnresolvedTypeOrSimpleId(QualType Ty,
2049 StringRef Prefix) {
2050 // Only certain other types are valid as prefixes; enumerate them.
2051 switch (Ty->getTypeClass()) {
2052 case Type::Builtin:
2053 case Type::Complex:
2054 case Type::Adjusted:
2055 case Type::Decayed:
2056 case Type::Pointer:
2057 case Type::BlockPointer:
2058 case Type::LValueReference:
2059 case Type::RValueReference:
2060 case Type::MemberPointer:
2061 case Type::ConstantArray:
2062 case Type::IncompleteArray:
2063 case Type::VariableArray:
2064 case Type::DependentSizedArray:
2065 case Type::DependentAddressSpace:
2066 case Type::DependentVector:
2067 case Type::DependentSizedExtVector:
2068 case Type::Vector:
2069 case Type::ExtVector:
2070 case Type::ConstantMatrix:
2071 case Type::DependentSizedMatrix:
2072 case Type::FunctionProto:
2073 case Type::FunctionNoProto:
2074 case Type::Paren:
2075 case Type::Attributed:
2076 case Type::Auto:
2077 case Type::DeducedTemplateSpecialization:
2078 case Type::PackExpansion:
2079 case Type::ObjCObject:
2080 case Type::ObjCInterface:
2081 case Type::ObjCObjectPointer:
2082 case Type::ObjCTypeParam:
2083 case Type::Atomic:
2084 case Type::Pipe:
2085 case Type::MacroQualified:
2086 case Type::ExtInt:
2087 case Type::DependentExtInt:
2088 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2088)
;
2089
2090 case Type::SubstTemplateTypeParmPack:
2091 // FIXME: not clear how to mangle this!
2092 // template <class T...> class A {
2093 // template <class U...> void foo(decltype(T::foo(U())) x...);
2094 // };
2095 Out << "_SUBSTPACK_";
2096 break;
2097
2098 // <unresolved-type> ::= <template-param>
2099 // ::= <decltype>
2100 // ::= <template-template-param> <template-args>
2101 // (this last is not official yet)
2102 case Type::TypeOfExpr:
2103 case Type::TypeOf:
2104 case Type::Decltype:
2105 case Type::TemplateTypeParm:
2106 case Type::UnaryTransform:
2107 case Type::SubstTemplateTypeParm:
2108 unresolvedType:
2109 // Some callers want a prefix before the mangled type.
2110 Out << Prefix;
2111
2112 // This seems to do everything we want. It's not really
2113 // sanctioned for a substituted template parameter, though.
2114 mangleType(Ty);
2115
2116 // We never want to print 'E' directly after an unresolved-type,
2117 // so we return directly.
2118 return true;
2119
2120 case Type::Typedef:
2121 mangleSourceNameWithAbiTags(cast<TypedefType>(Ty)->getDecl());
2122 break;
2123
2124 case Type::UnresolvedUsing:
2125 mangleSourceNameWithAbiTags(
2126 cast<UnresolvedUsingType>(Ty)->getDecl());
2127 break;
2128
2129 case Type::Enum:
2130 case Type::Record:
2131 mangleSourceNameWithAbiTags(cast<TagType>(Ty)->getDecl());
2132 break;
2133
2134 case Type::TemplateSpecialization: {
2135 const TemplateSpecializationType *TST =
2136 cast<TemplateSpecializationType>(Ty);
2137 TemplateName TN = TST->getTemplateName();
2138 switch (TN.getKind()) {
2139 case TemplateName::Template:
2140 case TemplateName::QualifiedTemplate: {
2141 TemplateDecl *TD = TN.getAsTemplateDecl();
2142
2143 // If the base is a template template parameter, this is an
2144 // unresolved type.
2145 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2145, __PRETTY_FUNCTION__))
;
2146 if (isa<TemplateTemplateParmDecl>(TD))
2147 goto unresolvedType;
2148
2149 mangleSourceNameWithAbiTags(TD);
2150 break;
2151 }
2152
2153 case TemplateName::OverloadedTemplate:
2154 case TemplateName::AssumedTemplate:
2155 case TemplateName::DependentTemplate:
2156 llvm_unreachable("invalid base for a template specialization type")::llvm::llvm_unreachable_internal("invalid base for a template specialization type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2156)
;
2157
2158 case TemplateName::SubstTemplateTemplateParm: {
2159 SubstTemplateTemplateParmStorage *subst =
2160 TN.getAsSubstTemplateTemplateParm();
2161 mangleExistingSubstitution(subst->getReplacement());
2162 break;
2163 }
2164
2165 case TemplateName::SubstTemplateTemplateParmPack: {
2166 // FIXME: not clear how to mangle this!
2167 // template <template <class U> class T...> class A {
2168 // template <class U...> void foo(decltype(T<U>::foo) x...);
2169 // };
2170 Out << "_SUBSTPACK_";
2171 break;
2172 }
2173 }
2174
2175 // Note: we don't pass in the template name here. We are mangling the
2176 // original source-level template arguments, so we shouldn't consider
2177 // conversions to the corresponding template parameter.
2178 // FIXME: Other compilers mangle partially-resolved template arguments in
2179 // unresolved-qualifier-levels.
2180 mangleTemplateArgs(TemplateName(), TST->getArgs(), TST->getNumArgs());
2181 break;
2182 }
2183
2184 case Type::InjectedClassName:
2185 mangleSourceNameWithAbiTags(
2186 cast<InjectedClassNameType>(Ty)->getDecl());
2187 break;
2188
2189 case Type::DependentName:
2190 mangleSourceName(cast<DependentNameType>(Ty)->getIdentifier());
2191 break;
2192
2193 case Type::DependentTemplateSpecialization: {
2194 const DependentTemplateSpecializationType *DTST =
2195 cast<DependentTemplateSpecializationType>(Ty);
2196 TemplateName Template = getASTContext().getDependentTemplateName(
2197 DTST->getQualifier(), DTST->getIdentifier());
2198 mangleSourceName(DTST->getIdentifier());
2199 mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs());
2200 break;
2201 }
2202
2203 case Type::Elaborated:
2204 return mangleUnresolvedTypeOrSimpleId(
2205 cast<ElaboratedType>(Ty)->getNamedType(), Prefix);
2206 }
2207
2208 return false;
2209}
2210
2211void CXXNameMangler::mangleOperatorName(DeclarationName Name, unsigned Arity) {
2212 switch (Name.getNameKind()) {
2213 case DeclarationName::CXXConstructorName:
2214 case DeclarationName::CXXDestructorName:
2215 case DeclarationName::CXXDeductionGuideName:
2216 case DeclarationName::CXXUsingDirective:
2217 case DeclarationName::Identifier:
2218 case DeclarationName::ObjCMultiArgSelector:
2219 case DeclarationName::ObjCOneArgSelector:
2220 case DeclarationName::ObjCZeroArgSelector:
2221 llvm_unreachable("Not an operator name")::llvm::llvm_unreachable_internal("Not an operator name", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2221)
;
2222
2223 case DeclarationName::CXXConversionFunctionName:
2224 // <operator-name> ::= cv <type> # (cast)
2225 Out << "cv";
2226 mangleType(Name.getCXXNameType());
2227 break;
2228
2229 case DeclarationName::CXXLiteralOperatorName:
2230 Out << "li";
2231 mangleSourceName(Name.getCXXLiteralIdentifier());
2232 return;
2233
2234 case DeclarationName::CXXOperatorName:
2235 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity);
2236 break;
2237 }
2238}
2239
2240void
2241CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) {
2242 switch (OO) {
2243 // <operator-name> ::= nw # new
2244 case OO_New: Out << "nw"; break;
2245 // ::= na # new[]
2246 case OO_Array_New: Out << "na"; break;
2247 // ::= dl # delete
2248 case OO_Delete: Out << "dl"; break;
2249 // ::= da # delete[]
2250 case OO_Array_Delete: Out << "da"; break;
2251 // ::= ps # + (unary)
2252 // ::= pl # + (binary or unknown)
2253 case OO_Plus:
2254 Out << (Arity == 1? "ps" : "pl"); break;
2255 // ::= ng # - (unary)
2256 // ::= mi # - (binary or unknown)
2257 case OO_Minus:
2258 Out << (Arity == 1? "ng" : "mi"); break;
2259 // ::= ad # & (unary)
2260 // ::= an # & (binary or unknown)
2261 case OO_Amp:
2262 Out << (Arity == 1? "ad" : "an"); break;
2263 // ::= de # * (unary)
2264 // ::= ml # * (binary or unknown)
2265 case OO_Star:
2266 // Use binary when unknown.
2267 Out << (Arity == 1? "de" : "ml"); break;
2268 // ::= co # ~
2269 case OO_Tilde: Out << "co"; break;
2270 // ::= dv # /
2271 case OO_Slash: Out << "dv"; break;
2272 // ::= rm # %
2273 case OO_Percent: Out << "rm"; break;
2274 // ::= or # |
2275 case OO_Pipe: Out << "or"; break;
2276 // ::= eo # ^
2277 case OO_Caret: Out << "eo"; break;
2278 // ::= aS # =
2279 case OO_Equal: Out << "aS"; break;
2280 // ::= pL # +=
2281 case OO_PlusEqual: Out << "pL"; break;
2282 // ::= mI # -=
2283 case OO_MinusEqual: Out << "mI"; break;
2284 // ::= mL # *=
2285 case OO_StarEqual: Out << "mL"; break;
2286 // ::= dV # /=
2287 case OO_SlashEqual: Out << "dV"; break;
2288 // ::= rM # %=
2289 case OO_PercentEqual: Out << "rM"; break;
2290 // ::= aN # &=
2291 case OO_AmpEqual: Out << "aN"; break;
2292 // ::= oR # |=
2293 case OO_PipeEqual: Out << "oR"; break;
2294 // ::= eO # ^=
2295 case OO_CaretEqual: Out << "eO"; break;
2296 // ::= ls # <<
2297 case OO_LessLess: Out << "ls"; break;
2298 // ::= rs # >>
2299 case OO_GreaterGreater: Out << "rs"; break;
2300 // ::= lS # <<=
2301 case OO_LessLessEqual: Out << "lS"; break;
2302 // ::= rS # >>=
2303 case OO_GreaterGreaterEqual: Out << "rS"; break;
2304 // ::= eq # ==
2305 case OO_EqualEqual: Out << "eq"; break;
2306 // ::= ne # !=
2307 case OO_ExclaimEqual: Out << "ne"; break;
2308 // ::= lt # <
2309 case OO_Less: Out << "lt"; break;
2310 // ::= gt # >
2311 case OO_Greater: Out << "gt"; break;
2312 // ::= le # <=
2313 case OO_LessEqual: Out << "le"; break;
2314 // ::= ge # >=
2315 case OO_GreaterEqual: Out << "ge"; break;
2316 // ::= nt # !
2317 case OO_Exclaim: Out << "nt"; break;
2318 // ::= aa # &&
2319 case OO_AmpAmp: Out << "aa"; break;
2320 // ::= oo # ||
2321 case OO_PipePipe: Out << "oo"; break;
2322 // ::= pp # ++
2323 case OO_PlusPlus: Out << "pp"; break;
2324 // ::= mm # --
2325 case OO_MinusMinus: Out << "mm"; break;
2326 // ::= cm # ,
2327 case OO_Comma: Out << "cm"; break;
2328 // ::= pm # ->*
2329 case OO_ArrowStar: Out << "pm"; break;
2330 // ::= pt # ->
2331 case OO_Arrow: Out << "pt"; break;
2332 // ::= cl # ()
2333 case OO_Call: Out << "cl"; break;
2334 // ::= ix # []
2335 case OO_Subscript: Out << "ix"; break;
2336
2337 // ::= qu # ?
2338 // The conditional operator can't be overloaded, but we still handle it when
2339 // mangling expressions.
2340 case OO_Conditional: Out << "qu"; break;
2341 // Proposal on cxx-abi-dev, 2015-10-21.
2342 // ::= aw # co_await
2343 case OO_Coawait: Out << "aw"; break;
2344 // Proposed in cxx-abi github issue 43.
2345 // ::= ss # <=>
2346 case OO_Spaceship: Out << "ss"; break;
2347
2348 case OO_None:
2349 case NUM_OVERLOADED_OPERATORS:
2350 llvm_unreachable("Not an overloaded operator")::llvm::llvm_unreachable_internal("Not an overloaded operator"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2350)
;
2351 }
2352}
2353
2354void CXXNameMangler::mangleQualifiers(Qualifiers Quals, const DependentAddressSpaceType *DAST) {
2355 // Vendor qualifiers come first and if they are order-insensitive they must
2356 // be emitted in reversed alphabetical order, see Itanium ABI 5.1.5.
2357
2358 // <type> ::= U <addrspace-expr>
2359 if (DAST) {
2360 Out << "U2ASI";
2361 mangleExpression(DAST->getAddrSpaceExpr());
2362 Out << "E";
2363 }
2364
2365 // Address space qualifiers start with an ordinary letter.
2366 if (Quals.hasAddressSpace()) {
2367 // Address space extension:
2368 //
2369 // <type> ::= U <target-addrspace>
2370 // <type> ::= U <OpenCL-addrspace>
2371 // <type> ::= U <CUDA-addrspace>
2372
2373 SmallString<64> ASString;
2374 LangAS AS = Quals.getAddressSpace();
2375
2376 if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
2377 // <target-addrspace> ::= "AS" <address-space-number>
2378 unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
2379 if (TargetAS != 0)
2380 ASString = "AS" + llvm::utostr(TargetAS);
2381 } else {
2382 switch (AS) {
2383 default: llvm_unreachable("Not a language specific address space")::llvm::llvm_unreachable_internal("Not a language specific address space"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2383)
;
2384 // <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
2385 // "private"| "generic" | "device" |
2386 // "host" ]
2387 case LangAS::opencl_global:
2388 ASString = "CLglobal";
2389 break;
2390 case LangAS::opencl_global_device:
2391 ASString = "CLdevice";
2392 break;
2393 case LangAS::opencl_global_host:
2394 ASString = "CLhost";
2395 break;
2396 case LangAS::opencl_local:
2397 ASString = "CLlocal";
2398 break;
2399 case LangAS::opencl_constant:
2400 ASString = "CLconstant";
2401 break;
2402 case LangAS::opencl_private:
2403 ASString = "CLprivate";
2404 break;
2405 case LangAS::opencl_generic:
2406 ASString = "CLgeneric";
2407 break;
2408 // <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
2409 case LangAS::cuda_device:
2410 ASString = "CUdevice";
2411 break;
2412 case LangAS::cuda_constant:
2413 ASString = "CUconstant";
2414 break;
2415 case LangAS::cuda_shared:
2416 ASString = "CUshared";
2417 break;
2418 // <ptrsize-addrspace> ::= [ "ptr32_sptr" | "ptr32_uptr" | "ptr64" ]
2419 case LangAS::ptr32_sptr:
2420 ASString = "ptr32_sptr";
2421 break;
2422 case LangAS::ptr32_uptr:
2423 ASString = "ptr32_uptr";
2424 break;
2425 case LangAS::ptr64:
2426 ASString = "ptr64";
2427 break;
2428 }
2429 }
2430 if (!ASString.empty())
2431 mangleVendorQualifier(ASString);
2432 }
2433
2434 // The ARC ownership qualifiers start with underscores.
2435 // Objective-C ARC Extension:
2436 //
2437 // <type> ::= U "__strong"
2438 // <type> ::= U "__weak"
2439 // <type> ::= U "__autoreleasing"
2440 //
2441 // Note: we emit __weak first to preserve the order as
2442 // required by the Itanium ABI.
2443 if (Quals.getObjCLifetime() == Qualifiers::OCL_Weak)
2444 mangleVendorQualifier("__weak");
2445
2446 // __unaligned (from -fms-extensions)
2447 if (Quals.hasUnaligned())
2448 mangleVendorQualifier("__unaligned");
2449
2450 // Remaining ARC ownership qualifiers.
2451 switch (Quals.getObjCLifetime()) {
2452 case Qualifiers::OCL_None:
2453 break;
2454
2455 case Qualifiers::OCL_Weak:
2456 // Do nothing as we already handled this case above.
2457 break;
2458
2459 case Qualifiers::OCL_Strong:
2460 mangleVendorQualifier("__strong");
2461 break;
2462
2463 case Qualifiers::OCL_Autoreleasing:
2464 mangleVendorQualifier("__autoreleasing");
2465 break;
2466
2467 case Qualifiers::OCL_ExplicitNone:
2468 // The __unsafe_unretained qualifier is *not* mangled, so that
2469 // __unsafe_unretained types in ARC produce the same manglings as the
2470 // equivalent (but, naturally, unqualified) types in non-ARC, providing
2471 // better ABI compatibility.
2472 //
2473 // It's safe to do this because unqualified 'id' won't show up
2474 // in any type signatures that need to be mangled.
2475 break;
2476 }
2477
2478 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const
2479 if (Quals.hasRestrict())
2480 Out << 'r';
2481 if (Quals.hasVolatile())
2482 Out << 'V';
2483 if (Quals.hasConst())
2484 Out << 'K';
2485}
2486
2487void CXXNameMangler::mangleVendorQualifier(StringRef name) {
2488 Out << 'U' << name.size() << name;
2489}
2490
2491void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
2492 // <ref-qualifier> ::= R # lvalue reference
2493 // ::= O # rvalue-reference
2494 switch (RefQualifier) {
2495 case RQ_None:
2496 break;
2497
2498 case RQ_LValue:
2499 Out << 'R';
2500 break;
2501
2502 case RQ_RValue:
2503 Out << 'O';
2504 break;
2505 }
2506}
2507
2508void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
2509 Context.mangleObjCMethodNameAsSourceName(MD, Out);
2510}
2511
2512static bool isTypeSubstitutable(Qualifiers Quals, const Type *Ty,
2513 ASTContext &Ctx) {
2514 if (Quals)
2515 return true;
2516 if (Ty->isSpecificBuiltinType(BuiltinType::ObjCSel))
2517 return true;
2518 if (Ty->isOpenCLSpecificType())
2519 return true;
2520 if (Ty->isBuiltinType())
2521 return false;
2522 // Through to Clang 6.0, we accidentally treated undeduced auto types as
2523 // substitution candidates.
2524 if (Ctx.getLangOpts().getClangABICompat() > LangOptions::ClangABI::Ver6 &&
2525 isa<AutoType>(Ty))
2526 return false;
2527 // A placeholder type for class template deduction is substitutable with
2528 // its corresponding template name; this is handled specially when mangling
2529 // the type.
2530 if (auto *DeducedTST = Ty->getAs<DeducedTemplateSpecializationType>())
2531 if (DeducedTST->getDeducedType().isNull())
2532 return false;
2533 return true;
2534}
2535
2536void CXXNameMangler::mangleType(QualType T) {
2537 // If our type is instantiation-dependent but not dependent, we mangle
2538 // it as it was written in the source, removing any top-level sugar.
2539 // Otherwise, use the canonical type.
2540 //
2541 // FIXME: This is an approximation of the instantiation-dependent name
2542 // mangling rules, since we should really be using the type as written and
2543 // augmented via semantic analysis (i.e., with implicit conversions and
2544 // default template arguments) for any instantiation-dependent type.
2545 // Unfortunately, that requires several changes to our AST:
2546 // - Instantiation-dependent TemplateSpecializationTypes will need to be
2547 // uniqued, so that we can handle substitutions properly
2548 // - Default template arguments will need to be represented in the
2549 // TemplateSpecializationType, since they need to be mangled even though
2550 // they aren't written.
2551 // - Conversions on non-type template arguments need to be expressed, since
2552 // they can affect the mangling of sizeof/alignof.
2553 //
2554 // FIXME: This is wrong when mapping to the canonical type for a dependent
2555 // type discards instantiation-dependent portions of the type, such as for:
2556 //
2557 // template<typename T, int N> void f(T (&)[sizeof(N)]);
2558 // template<typename T> void f(T() throw(typename T::type)); (pre-C++17)
2559 //
2560 // It's also wrong in the opposite direction when instantiation-dependent,
2561 // canonically-equivalent types differ in some irrelevant portion of inner
2562 // type sugar. In such cases, we fail to form correct substitutions, eg:
2563 //
2564 // template<int N> void f(A<sizeof(N)> *, A<sizeof(N)> (*));
2565 //
2566 // We should instead canonicalize the non-instantiation-dependent parts,
2567 // regardless of whether the type as a whole is dependent or instantiation
2568 // dependent.
2569 if (!T->isInstantiationDependentType() || T->isDependentType())
2570 T = T.getCanonicalType();
2571 else {
2572 // Desugar any types that are purely sugar.
2573 do {
2574 // Don't desugar through template specialization types that aren't
2575 // type aliases. We need to mangle the template arguments as written.
2576 if (const TemplateSpecializationType *TST
2577 = dyn_cast<TemplateSpecializationType>(T))
2578 if (!TST->isTypeAlias())
2579 break;
2580
2581 // FIXME: We presumably shouldn't strip off ElaboratedTypes with
2582 // instantation-dependent qualifiers. See
2583 // https://github.com/itanium-cxx-abi/cxx-abi/issues/114.
2584
2585 QualType Desugared
2586 = T.getSingleStepDesugaredType(Context.getASTContext());
2587 if (Desugared == T)
2588 break;
2589
2590 T = Desugared;
2591 } while (true);
2592 }
2593 SplitQualType split = T.split();
2594 Qualifiers quals = split.Quals;
2595 const Type *ty = split.Ty;
2596
2597 bool isSubstitutable =
2598 isTypeSubstitutable(quals, ty, Context.getASTContext());
2599 if (isSubstitutable && mangleSubstitution(T))
2600 return;
2601
2602 // If we're mangling a qualified array type, push the qualifiers to
2603 // the element type.
2604 if (quals && isa<ArrayType>(T)) {
2605 ty = Context.getASTContext().getAsArrayType(T);
2606 quals = Qualifiers();
2607
2608 // Note that we don't update T: we want to add the
2609 // substitution at the original type.
2610 }
2611
2612 if (quals || ty->isDependentAddressSpaceType()) {
2613 if (const DependentAddressSpaceType *DAST =
2614 dyn_cast<DependentAddressSpaceType>(ty)) {
2615 SplitQualType splitDAST = DAST->getPointeeType().split();
2616 mangleQualifiers(splitDAST.Quals, DAST);
2617 mangleType(QualType(splitDAST.Ty, 0));
2618 } else {
2619 mangleQualifiers(quals);
2620
2621 // Recurse: even if the qualified type isn't yet substitutable,
2622 // the unqualified type might be.
2623 mangleType(QualType(ty, 0));
2624 }
2625 } else {
2626 switch (ty->getTypeClass()) {
2627#define ABSTRACT_TYPE(CLASS, PARENT)
2628#define NON_CANONICAL_TYPE(CLASS, PARENT) \
2629 case Type::CLASS: \
2630 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2630)
; \
2631 return;
2632#define TYPE(CLASS, PARENT) \
2633 case Type::CLASS: \
2634 mangleType(static_cast<const CLASS##Type*>(ty)); \
2635 break;
2636#include "clang/AST/TypeNodes.inc"
2637 }
2638 }
2639
2640 // Add the substitution.
2641 if (isSubstitutable)
2642 addSubstitution(T);
2643}
2644
2645void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) {
2646 if (!mangleStandardSubstitution(ND))
2647 mangleName(ND);
2648}
2649
2650void CXXNameMangler::mangleType(const BuiltinType *T) {
2651 // <type> ::= <builtin-type>
2652 // <builtin-type> ::= v # void
2653 // ::= w # wchar_t
2654 // ::= b # bool
2655 // ::= c # char
2656 // ::= a # signed char
2657 // ::= h # unsigned char
2658 // ::= s # short
2659 // ::= t # unsigned short
2660 // ::= i # int
2661 // ::= j # unsigned int
2662 // ::= l # long
2663 // ::= m # unsigned long
2664 // ::= x # long long, __int64
2665 // ::= y # unsigned long long, __int64
2666 // ::= n # __int128
2667 // ::= o # unsigned __int128
2668 // ::= f # float
2669 // ::= d # double
2670 // ::= e # long double, __float80
2671 // ::= g # __float128
2672 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits)
2673 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits)
2674 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits)
2675 // ::= Dh # IEEE 754r half-precision floating point (16 bits)
2676 // ::= DF <number> _ # ISO/IEC TS 18661 binary floating point type _FloatN (N bits);
2677 // ::= Di # char32_t
2678 // ::= Ds # char16_t
2679 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
2680 // ::= u <source-name> # vendor extended type
2681 std::string type_name;
2682 switch (T->getKind()) {
2683 case BuiltinType::Void:
2684 Out << 'v';
2685 break;
2686 case BuiltinType::Bool:
2687 Out << 'b';
2688 break;
2689 case BuiltinType::Char_U:
2690 case BuiltinType::Char_S:
2691 Out << 'c';
2692 break;
2693 case BuiltinType::UChar:
2694 Out << 'h';
2695 break;
2696 case BuiltinType::UShort:
2697 Out << 't';
2698 break;
2699 case BuiltinType::UInt:
2700 Out << 'j';
2701 break;
2702 case BuiltinType::ULong:
2703 Out << 'm';
2704 break;
2705 case BuiltinType::ULongLong:
2706 Out << 'y';
2707 break;
2708 case BuiltinType::UInt128:
2709 Out << 'o';
2710 break;
2711 case BuiltinType::SChar:
2712 Out << 'a';
2713 break;
2714 case BuiltinType::WChar_S:
2715 case BuiltinType::WChar_U:
2716 Out << 'w';
2717 break;
2718 case BuiltinType::Char8:
2719 Out << "Du";
2720 break;
2721 case BuiltinType::Char16:
2722 Out << "Ds";
2723 break;
2724 case BuiltinType::Char32:
2725 Out << "Di";
2726 break;
2727 case BuiltinType::Short:
2728 Out << 's';
2729 break;
2730 case BuiltinType::Int:
2731 Out << 'i';
2732 break;
2733 case BuiltinType::Long:
2734 Out << 'l';
2735 break;
2736 case BuiltinType::LongLong:
2737 Out << 'x';
2738 break;
2739 case BuiltinType::Int128:
2740 Out << 'n';
2741 break;
2742 case BuiltinType::Float16:
2743 Out << "DF16_";
2744 break;
2745 case BuiltinType::ShortAccum:
2746 case BuiltinType::Accum:
2747 case BuiltinType::LongAccum:
2748 case BuiltinType::UShortAccum:
2749 case BuiltinType::UAccum:
2750 case BuiltinType::ULongAccum:
2751 case BuiltinType::ShortFract:
2752 case BuiltinType::Fract:
2753 case BuiltinType::LongFract:
2754 case BuiltinType::UShortFract:
2755 case BuiltinType::UFract:
2756 case BuiltinType::ULongFract:
2757 case BuiltinType::SatShortAccum:
2758 case BuiltinType::SatAccum:
2759 case BuiltinType::SatLongAccum:
2760 case BuiltinType::SatUShortAccum:
2761 case BuiltinType::SatUAccum:
2762 case BuiltinType::SatULongAccum:
2763 case BuiltinType::SatShortFract:
2764 case BuiltinType::SatFract:
2765 case BuiltinType::SatLongFract:
2766 case BuiltinType::SatUShortFract:
2767 case BuiltinType::SatUFract:
2768 case BuiltinType::SatULongFract:
2769 llvm_unreachable("Fixed point types are disabled for c++")::llvm::llvm_unreachable_internal("Fixed point types are disabled for c++"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2769)
;
2770 case BuiltinType::Half:
2771 Out << "Dh";
2772 break;
2773 case BuiltinType::Float:
2774 Out << 'f';
2775 break;
2776 case BuiltinType::Double:
2777 Out << 'd';
2778 break;
2779 case BuiltinType::LongDouble: {
2780 const TargetInfo *TI = getASTContext().getLangOpts().OpenMP &&
2781 getASTContext().getLangOpts().OpenMPIsDevice
2782 ? getASTContext().getAuxTargetInfo()
2783 : &getASTContext().getTargetInfo();
2784 Out << TI->getLongDoubleMangling();
2785 break;
2786 }
2787 case BuiltinType::Float128: {
2788 const TargetInfo *TI = getASTContext().getLangOpts().OpenMP &&
2789 getASTContext().getLangOpts().OpenMPIsDevice
2790 ? getASTContext().getAuxTargetInfo()
2791 : &getASTContext().getTargetInfo();
2792 Out << TI->getFloat128Mangling();
2793 break;
2794 }
2795 case BuiltinType::BFloat16: {
2796 const TargetInfo *TI = &getASTContext().getTargetInfo();
2797 Out << TI->getBFloat16Mangling();
2798 break;
2799 }
2800 case BuiltinType::NullPtr:
2801 Out << "Dn";
2802 break;
2803
2804#define BUILTIN_TYPE(Id, SingletonId)
2805#define PLACEHOLDER_TYPE(Id, SingletonId) \
2806 case BuiltinType::Id:
2807#include "clang/AST/BuiltinTypes.def"
2808 case BuiltinType::Dependent:
2809 if (!NullOut)
2810 llvm_unreachable("mangling a placeholder type")::llvm::llvm_unreachable_internal("mangling a placeholder type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2810)
;
2811 break;
2812 case BuiltinType::ObjCId:
2813 Out << "11objc_object";
2814 break;
2815 case BuiltinType::ObjCClass:
2816 Out << "10objc_class";
2817 break;
2818 case BuiltinType::ObjCSel:
2819 Out << "13objc_selector";
2820 break;
2821#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2822 case BuiltinType::Id: \
2823 type_name = "ocl_" #ImgType "_" #Suffix; \
2824 Out << type_name.size() << type_name; \
2825 break;
2826#include "clang/Basic/OpenCLImageTypes.def"
2827 case BuiltinType::OCLSampler:
2828 Out << "11ocl_sampler";
2829 break;
2830 case BuiltinType::OCLEvent:
2831 Out << "9ocl_event";
2832 break;
2833 case BuiltinType::OCLClkEvent:
2834 Out << "12ocl_clkevent";
2835 break;
2836 case BuiltinType::OCLQueue:
2837 Out << "9ocl_queue";
2838 break;
2839 case BuiltinType::OCLReserveID:
2840 Out << "13ocl_reserveid";
2841 break;
2842#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2843 case BuiltinType::Id: \
2844 type_name = "ocl_" #ExtType; \
2845 Out << type_name.size() << type_name; \
2846 break;
2847#include "clang/Basic/OpenCLExtensionTypes.def"
2848 // The SVE types are effectively target-specific. The mangling scheme
2849 // is defined in the appendices to the Procedure Call Standard for the
2850 // Arm Architecture.
2851#define SVE_VECTOR_TYPE(InternalName, MangledName, Id, SingletonId, NumEls, \
2852 ElBits, IsSigned, IsFP, IsBF) \
2853 case BuiltinType::Id: \
2854 type_name = MangledName; \
2855 Out << (type_name == InternalName ? "u" : "") << type_name.size() \
2856 << type_name; \
2857 break;
2858#define SVE_PREDICATE_TYPE(InternalName, MangledName, Id, SingletonId, NumEls) \
2859 case BuiltinType::Id: \
2860 type_name = MangledName; \
2861 Out << (type_name == InternalName ? "u" : "") << type_name.size() \
2862 << type_name; \
2863 break;
2864#include "clang/Basic/AArch64SVEACLETypes.def"
2865#define PPC_VECTOR_TYPE(Name, Id, Size) \
2866 case BuiltinType::Id: \
2867 type_name = #Name; \
2868 Out << 'u' << type_name.size() << type_name; \
2869 break;
2870#include "clang/Basic/PPCTypes.def"
2871 }
2872}
2873
2874StringRef CXXNameMangler::getCallingConvQualifierName(CallingConv CC) {
2875 switch (CC) {
2876 case CC_C:
2877 return "";
2878
2879 case CC_X86VectorCall:
2880 case CC_X86Pascal:
2881 case CC_X86RegCall:
2882 case CC_AAPCS:
2883 case CC_AAPCS_VFP:
2884 case CC_AArch64VectorCall:
2885 case CC_IntelOclBicc:
2886 case CC_SpirFunction:
2887 case CC_OpenCLKernel:
2888 case CC_PreserveMost:
2889 case CC_PreserveAll:
2890 // FIXME: we should be mangling all of the above.
2891 return "";
2892
2893 case CC_X86ThisCall:
2894 // FIXME: To match mingw GCC, thiscall should only be mangled in when it is
2895 // used explicitly. At this point, we don't have that much information in
2896 // the AST, since clang tends to bake the convention into the canonical
2897 // function type. thiscall only rarely used explicitly, so don't mangle it
2898 // for now.
2899 return "";
2900
2901 case CC_X86StdCall:
2902 return "stdcall";
2903 case CC_X86FastCall:
2904 return "fastcall";
2905 case CC_X86_64SysV:
2906 return "sysv_abi";
2907 case CC_Win64:
2908 return "ms_abi";
2909 case CC_Swift:
2910 return "swiftcall";
2911 }
2912 llvm_unreachable("bad calling convention")::llvm::llvm_unreachable_internal("bad calling convention", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2912)
;
2913}
2914
2915void CXXNameMangler::mangleExtFunctionInfo(const FunctionType *T) {
2916 // Fast path.
2917 if (T->getExtInfo() == FunctionType::ExtInfo())
2918 return;
2919
2920 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
2921 // This will get more complicated in the future if we mangle other
2922 // things here; but for now, since we mangle ns_returns_retained as
2923 // a qualifier on the result type, we can get away with this:
2924 StringRef CCQualifier = getCallingConvQualifierName(T->getExtInfo().getCC());
2925 if (!CCQualifier.empty())
2926 mangleVendorQualifier(CCQualifier);
2927
2928 // FIXME: regparm
2929 // FIXME: noreturn
2930}
2931
2932void
2933CXXNameMangler::mangleExtParameterInfo(FunctionProtoType::ExtParameterInfo PI) {
2934 // Vendor-specific qualifiers are emitted in reverse alphabetical order.
2935
2936 // Note that these are *not* substitution candidates. Demanglers might
2937 // have trouble with this if the parameter type is fully substituted.
2938
2939 switch (PI.getABI()) {
2940 case ParameterABI::Ordinary:
2941 break;
2942
2943 // All of these start with "swift", so they come before "ns_consumed".
2944 case ParameterABI::SwiftContext:
2945 case ParameterABI::SwiftErrorResult:
2946 case ParameterABI::SwiftIndirectResult:
2947 mangleVendorQualifier(getParameterABISpelling(PI.getABI()));
2948 break;
2949 }
2950
2951 if (PI.isConsumed())
2952 mangleVendorQualifier("ns_consumed");
2953
2954 if (PI.isNoEscape())
2955 mangleVendorQualifier("noescape");
2956}
2957
2958// <type> ::= <function-type>
2959// <function-type> ::= [<CV-qualifiers>] F [Y]
2960// <bare-function-type> [<ref-qualifier>] E
2961void CXXNameMangler::mangleType(const FunctionProtoType *T) {
2962 mangleExtFunctionInfo(T);
2963
2964 // Mangle CV-qualifiers, if present. These are 'this' qualifiers,
2965 // e.g. "const" in "int (A::*)() const".
2966 mangleQualifiers(T->getMethodQuals());
2967
2968 // Mangle instantiation-dependent exception-specification, if present,
2969 // per cxx-abi-dev proposal on 2016-10-11.
2970 if (T->hasInstantiationDependentExceptionSpec()) {
2971 if (isComputedNoexcept(T->getExceptionSpecType())) {
2972 Out << "DO";
2973 mangleExpression(T->getNoexceptExpr());
2974 Out << "E";
2975 } else {
2976 assert(T->getExceptionSpecType() == EST_Dynamic)((T->getExceptionSpecType() == EST_Dynamic) ? static_cast<
void> (0) : __assert_fail ("T->getExceptionSpecType() == EST_Dynamic"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 2976, __PRETTY_FUNCTION__))
;
2977 Out << "Dw";
2978 for (auto ExceptTy : T->exceptions())
2979 mangleType(ExceptTy);
2980 Out << "E";
2981 }
2982 } else if (T->isNothrow()) {
2983 Out << "Do";
2984 }
2985
2986 Out << 'F';
2987
2988 // FIXME: We don't have enough information in the AST to produce the 'Y'
2989 // encoding for extern "C" function types.
2990 mangleBareFunctionType(T, /*MangleReturnType=*/true);
2991
2992 // Mangle the ref-qualifier, if present.
2993 mangleRefQualifier(T->getRefQualifier());
2994
2995 Out << 'E';
2996}
2997
2998void CXXNameMangler::mangleType(const FunctionNoProtoType *T) {
2999 // Function types without prototypes can arise when mangling a function type
3000 // within an overloadable function in C. We mangle these as the absence of any
3001 // parameter types (not even an empty parameter list).
3002 Out << 'F';
3003
3004 FunctionTypeDepthState saved = FunctionTypeDepth.push();
3005
3006 FunctionTypeDepth.enterResultType();
3007 mangleType(T->getReturnType());
3008 FunctionTypeDepth.leaveResultType();
3009
3010 FunctionTypeDepth.pop(saved);
3011 Out << 'E';
3012}
3013
3014void CXXNameMangler::mangleBareFunctionType(const FunctionProtoType *Proto,
3015 bool MangleReturnType,
3016 const FunctionDecl *FD) {
3017 // Record that we're in a function type. See mangleFunctionParam
3018 // for details on what we're trying to achieve here.
3019 FunctionTypeDepthState saved = FunctionTypeDepth.push();
3020
3021 // <bare-function-type> ::= <signature type>+
3022 if (MangleReturnType) {
3023 FunctionTypeDepth.enterResultType();
3024
3025 // Mangle ns_returns_retained as an order-sensitive qualifier here.
3026 if (Proto->getExtInfo().getProducesResult() && FD == nullptr)
3027 mangleVendorQualifier("ns_returns_retained");
3028
3029 // Mangle the return type without any direct ARC ownership qualifiers.
3030 QualType ReturnTy = Proto->getReturnType();
3031 if (ReturnTy.getObjCLifetime()) {
3032 auto SplitReturnTy = ReturnTy.split();
3033 SplitReturnTy.Quals.removeObjCLifetime();
3034 ReturnTy = getASTContext().getQualifiedType(SplitReturnTy);
3035 }
3036 mangleType(ReturnTy);
3037
3038 FunctionTypeDepth.leaveResultType();
3039 }
3040
3041 if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
3042 // <builtin-type> ::= v # void
3043 Out << 'v';
3044
3045 FunctionTypeDepth.pop(saved);
3046 return;
3047 }
3048
3049 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3049, __PRETTY_FUNCTION__))
;
3050 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
3051 // Mangle extended parameter info as order-sensitive qualifiers here.
3052 if (Proto->hasExtParameterInfos() && FD == nullptr) {
3053 mangleExtParameterInfo(Proto->getExtParameterInfo(I));
3054 }
3055
3056 // Mangle the type.
3057 QualType ParamTy = Proto->getParamType(I);
3058 mangleType(Context.getASTContext().getSignatureParameterType(ParamTy));
3059
3060 if (FD) {
3061 if (auto *Attr = FD->getParamDecl(I)->getAttr<PassObjectSizeAttr>()) {
3062 // Attr can only take 1 character, so we can hardcode the length below.
3063 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3063, __PRETTY_FUNCTION__))
;
3064 if (Attr->isDynamic())
3065 Out << "U25pass_dynamic_object_size" << Attr->getType();
3066 else
3067 Out << "U17pass_object_size" << Attr->getType();
3068 }
3069 }
3070 }
3071
3072 FunctionTypeDepth.pop(saved);
3073
3074 // <builtin-type> ::= z # ellipsis
3075 if (Proto->isVariadic())
3076 Out << 'z';
3077}
3078
3079// <type> ::= <class-enum-type>
3080// <class-enum-type> ::= <name>
3081void CXXNameMangler::mangleType(const UnresolvedUsingType *T) {
3082 mangleName(T->getDecl());
3083}
3084
3085// <type> ::= <class-enum-type>
3086// <class-enum-type> ::= <name>
3087void CXXNameMangler::mangleType(const EnumType *T) {
3088 mangleType(static_cast<const TagType*>(T));
3089}
3090void CXXNameMangler::mangleType(const RecordType *T) {
3091 mangleType(static_cast<const TagType*>(T));
3092}
3093void CXXNameMangler::mangleType(const TagType *T) {
3094 mangleName(T->getDecl());
3095}
3096
3097// <type> ::= <array-type>
3098// <array-type> ::= A <positive dimension number> _ <element type>
3099// ::= A [<dimension expression>] _ <element type>
3100void CXXNameMangler::mangleType(const ConstantArrayType *T) {
3101 Out << 'A' << T->getSize() << '_';
3102 mangleType(T->getElementType());
3103}
3104void CXXNameMangler::mangleType(const VariableArrayType *T) {
3105 Out << 'A';
3106 // decayed vla types (size 0) will just be skipped.
3107 if (T->getSizeExpr())
3108 mangleExpression(T->getSizeExpr());
3109 Out << '_';
3110 mangleType(T->getElementType());
3111}
3112void CXXNameMangler::mangleType(const DependentSizedArrayType *T) {
3113 Out << 'A';
3114 mangleExpression(T->getSizeExpr());
3115 Out << '_';
3116 mangleType(T->getElementType());
3117}
3118void CXXNameMangler::mangleType(const IncompleteArrayType *T) {
3119 Out << "A_";
3120 mangleType(T->getElementType());
3121}
3122
3123// <type> ::= <pointer-to-member-type>
3124// <pointer-to-member-type> ::= M <class type> <member type>
3125void CXXNameMangler::mangleType(const MemberPointerType *T) {
3126 Out << 'M';
3127 mangleType(QualType(T->getClass(), 0));
3128 QualType PointeeType = T->getPointeeType();
3129 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) {
3130 mangleType(FPT);
3131
3132 // Itanium C++ ABI 5.1.8:
3133 //
3134 // The type of a non-static member function is considered to be different,
3135 // for the purposes of substitution, from the type of a namespace-scope or
3136 // static member function whose type appears similar. The types of two
3137 // non-static member functions are considered to be different, for the
3138 // purposes of substitution, if the functions are members of different
3139 // classes. In other words, for the purposes of substitution, the class of
3140 // which the function is a member is considered part of the type of
3141 // function.
3142
3143 // Given that we already substitute member function pointers as a
3144 // whole, the net effect of this rule is just to unconditionally
3145 // suppress substitution on the function type in a member pointer.
3146 // We increment the SeqID here to emulate adding an entry to the
3147 // substitution table.
3148 ++SeqID;
3149 } else
3150 mangleType(PointeeType);
3151}
3152
3153// <type> ::= <template-param>
3154void CXXNameMangler::mangleType(const TemplateTypeParmType *T) {
3155 mangleTemplateParameter(T->getDepth(), T->getIndex());
3156}
3157
3158// <type> ::= <template-param>
3159void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) {
3160 // FIXME: not clear how to mangle this!
3161 // template <class T...> class A {
3162 // template <class U...> void foo(T(*)(U) x...);
3163 // };
3164 Out << "_SUBSTPACK_";
3165}
3166
3167// <type> ::= P <type> # pointer-to
3168void CXXNameMangler::mangleType(const PointerType *T) {
3169 Out << 'P';
3170 mangleType(T->getPointeeType());
3171}
3172void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) {
3173 Out << 'P';
3174 mangleType(T->getPointeeType());
3175}
3176
3177// <type> ::= R <type> # reference-to
3178void CXXNameMangler::mangleType(const LValueReferenceType *T) {
3179 Out << 'R';
3180 mangleType(T->getPointeeType());
3181}
3182
3183// <type> ::= O <type> # rvalue reference-to (C++0x)
3184void CXXNameMangler::mangleType(const RValueReferenceType *T) {
3185 Out << 'O';
3186 mangleType(T->getPointeeType());
3187}
3188
3189// <type> ::= C <type> # complex pair (C 2000)
3190void CXXNameMangler::mangleType(const ComplexType *T) {
3191 Out << 'C';
3192 mangleType(T->getElementType());
3193}
3194
3195// ARM's ABI for Neon vector types specifies that they should be mangled as
3196// if they are structs (to match ARM's initial implementation). The
3197// vector type must be one of the special types predefined by ARM.
3198void CXXNameMangler::mangleNeonVectorType(const VectorType *T) {
3199 QualType EltType = T->getElementType();
3200 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3200, __PRETTY_FUNCTION__))
;
3201 const char *EltName = nullptr;
3202 if (T->getVectorKind() == VectorType::NeonPolyVector) {
3203 switch (cast<BuiltinType>(EltType)->getKind()) {
3204 case BuiltinType::SChar:
3205 case BuiltinType::UChar:
3206 EltName = "poly8_t";
3207 break;
3208 case BuiltinType::Short:
3209 case BuiltinType::UShort:
3210 EltName = "poly16_t";
3211 break;
3212 case BuiltinType::LongLong:
3213 case BuiltinType::ULongLong:
3214 EltName = "poly64_t";
3215 break;
3216 default: llvm_unreachable("unexpected Neon polynomial vector element type")::llvm::llvm_unreachable_internal("unexpected Neon polynomial vector element type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3216)
;
3217 }
3218 } else {
3219 switch (cast<BuiltinType>(EltType)->getKind()) {
3220 case BuiltinType::SChar: EltName = "int8_t"; break;
3221 case BuiltinType::UChar: EltName = "uint8_t"; break;
3222 case BuiltinType::Short: EltName = "int16_t"; break;
3223 case BuiltinType::UShort: EltName = "uint16_t"; break;
3224 case BuiltinType::Int: EltName = "int32_t"; break;
3225 case BuiltinType::UInt: EltName = "uint32_t"; break;
3226 case BuiltinType::LongLong: EltName = "int64_t"; break;
3227 case BuiltinType::ULongLong: EltName = "uint64_t"; break;
3228 case BuiltinType::Double: EltName = "float64_t"; break;
3229 case BuiltinType::Float: EltName = "float32_t"; break;
3230 case BuiltinType::Half: EltName = "float16_t"; break;
3231 case BuiltinType::BFloat16: EltName = "bfloat16_t"; break;
3232 default:
3233 llvm_unreachable("unexpected Neon vector element type")::llvm::llvm_unreachable_internal("unexpected Neon vector element type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3233)
;
3234 }
3235 }
3236 const char *BaseName = nullptr;
3237 unsigned BitSize = (T->getNumElements() *
3238 getASTContext().getTypeSize(EltType));
3239 if (BitSize == 64)
3240 BaseName = "__simd64_";
3241 else {
3242 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3242, __PRETTY_FUNCTION__))
;
3243 BaseName = "__simd128_";
3244 }
3245 Out << strlen(BaseName) + strlen(EltName);
3246 Out << BaseName << EltName;
3247}
3248
3249void CXXNameMangler::mangleNeonVectorType(const DependentVectorType *T) {
3250 DiagnosticsEngine &Diags = Context.getDiags();
3251 unsigned DiagID = Diags.getCustomDiagID(
3252 DiagnosticsEngine::Error,
3253 "cannot mangle this dependent neon vector type yet");
3254 Diags.Report(T->getAttributeLoc(), DiagID);
3255}
3256
3257static StringRef mangleAArch64VectorBase(const BuiltinType *EltType) {
3258 switch (EltType->getKind()) {
3259 case BuiltinType::SChar:
3260 return "Int8";
3261 case BuiltinType::Short:
3262 return "Int16";
3263 case BuiltinType::Int:
3264 return "Int32";
3265 case BuiltinType::Long:
3266 case BuiltinType::LongLong:
3267 return "Int64";
3268 case BuiltinType::UChar:
3269 return "Uint8";
3270 case BuiltinType::UShort:
3271 return "Uint16";
3272 case BuiltinType::UInt:
3273 return "Uint32";
3274 case BuiltinType::ULong:
3275 case BuiltinType::ULongLong:
3276 return "Uint64";
3277 case BuiltinType::Half:
3278 return "Float16";
3279 case BuiltinType::Float:
3280 return "Float32";
3281 case BuiltinType::Double:
3282 return "Float64";
3283 case BuiltinType::BFloat16:
3284 return "Bfloat16";
3285 default:
3286 llvm_unreachable("Unexpected vector element base type")::llvm::llvm_unreachable_internal("Unexpected vector element base type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3286)
;
3287 }
3288}
3289
3290// AArch64's ABI for Neon vector types specifies that they should be mangled as
3291// the equivalent internal name. The vector type must be one of the special
3292// types predefined by ARM.
3293void CXXNameMangler::mangleAArch64NeonVectorType(const VectorType *T) {
3294 QualType EltType = T->getElementType();
3295 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3295, __PRETTY_FUNCTION__))
;
3296 unsigned BitSize =
3297 (T->getNumElements() * getASTContext().getTypeSize(EltType));
3298 (void)BitSize; // Silence warning.
3299
3300 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3301, __PRETTY_FUNCTION__))
3301 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3301, __PRETTY_FUNCTION__))
;
3302
3303 StringRef EltName;
3304 if (T->getVectorKind() == VectorType::NeonPolyVector) {
3305 switch (cast<BuiltinType>(EltType)->getKind()) {
3306 case BuiltinType::UChar:
3307 EltName = "Poly8";
3308 break;
3309 case BuiltinType::UShort:
3310 EltName = "Poly16";
3311 break;
3312 case BuiltinType::ULong:
3313 case BuiltinType::ULongLong:
3314 EltName = "Poly64";
3315 break;
3316 default:
3317 llvm_unreachable("unexpected Neon polynomial vector element type")::llvm::llvm_unreachable_internal("unexpected Neon polynomial vector element type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3317)
;
3318 }
3319 } else
3320 EltName = mangleAArch64VectorBase(cast<BuiltinType>(EltType));
3321
3322 std::string TypeName =
3323 ("__" + EltName + "x" + Twine(T->getNumElements()) + "_t").str();
3324 Out << TypeName.length() << TypeName;
3325}
3326void CXXNameMangler::mangleAArch64NeonVectorType(const DependentVectorType *T) {
3327 DiagnosticsEngine &Diags = Context.getDiags();
3328 unsigned DiagID = Diags.getCustomDiagID(
3329 DiagnosticsEngine::Error,
3330 "cannot mangle this dependent neon vector type yet");
3331 Diags.Report(T->getAttributeLoc(), DiagID);
3332}
3333
3334// The AArch64 ACLE specifies that fixed-length SVE vector and predicate types
3335// defined with the 'arm_sve_vector_bits' attribute map to the same AAPCS64
3336// type as the sizeless variants.
3337//
3338// The mangling scheme for VLS types is implemented as a "pseudo" template:
3339//
3340// '__SVE_VLS<<type>, <vector length>>'
3341//
3342// Combining the existing SVE type and a specific vector length (in bits).
3343// For example:
3344//
3345// typedef __SVInt32_t foo __attribute__((arm_sve_vector_bits(512)));
3346//
3347// is described as '__SVE_VLS<__SVInt32_t, 512u>' and mangled as:
3348//
3349// "9__SVE_VLSI" + base type mangling + "Lj" + __ARM_FEATURE_SVE_BITS + "EE"
3350//
3351// i.e. 9__SVE_VLSIu11__SVInt32_tLj512EE
3352//
3353// The latest ACLE specification (00bet5) does not contain details of this
3354// mangling scheme, it will be specified in the next revision. The mangling
3355// scheme is otherwise defined in the appendices to the Procedure Call Standard
3356// for the Arm Architecture, see
3357// https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst#appendix-c-mangling
3358void CXXNameMangler::mangleAArch64FixedSveVectorType(const VectorType *T) {
3359 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3361, __PRETTY_FUNCTION__))
3360 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3361, __PRETTY_FUNCTION__))
3361 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3361, __PRETTY_FUNCTION__))
;
3362
3363 QualType EltType = T->getElementType();
3364 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3365, __PRETTY_FUNCTION__))
3365 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3365, __PRETTY_FUNCTION__))
;
3366
3367 StringRef TypeName;
3368 switch (cast<BuiltinType>(EltType)->getKind()) {
3369 case BuiltinType::SChar:
3370 TypeName = "__SVInt8_t";
3371 break;
3372 case BuiltinType::UChar: {
3373 if (T->getVectorKind() == VectorType::SveFixedLengthDataVector)
3374 TypeName = "__SVUint8_t";
3375 else
3376 TypeName = "__SVBool_t";
3377 break;
3378 }
3379 case BuiltinType::Short:
3380 TypeName = "__SVInt16_t";
3381 break;
3382 case BuiltinType::UShort:
3383 TypeName = "__SVUint16_t";
3384 break;
3385 case BuiltinType::Int:
3386 TypeName = "__SVInt32_t";
3387 break;
3388 case BuiltinType::UInt:
3389 TypeName = "__SVUint32_t";
3390 break;
3391 case BuiltinType::Long:
3392 TypeName = "__SVInt64_t";
3393 break;
3394 case BuiltinType::ULong:
3395 TypeName = "__SVUint64_t";
3396 break;
3397 case BuiltinType::Half:
3398 TypeName = "__SVFloat16_t";
3399 break;
3400 case BuiltinType::Float:
3401 TypeName = "__SVFloat32_t";
3402 break;
3403 case BuiltinType::Double:
3404 TypeName = "__SVFloat64_t";
3405 break;
3406 case BuiltinType::BFloat16:
3407 TypeName = "__SVBfloat16_t";
3408 break;
3409 default:
3410 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3410)
;
3411 }
3412
3413 unsigned VecSizeInBits = getASTContext().getTypeInfo(T).Width;
3414
3415 if (T->getVectorKind() == VectorType::SveFixedLengthPredicateVector)
3416 VecSizeInBits *= 8;
3417
3418 Out << "9__SVE_VLSI" << 'u' << TypeName.size() << TypeName << "Lj"
3419 << VecSizeInBits << "EE";
3420}
3421
3422void CXXNameMangler::mangleAArch64FixedSveVectorType(
3423 const DependentVectorType *T) {
3424 DiagnosticsEngine &Diags = Context.getDiags();
3425 unsigned DiagID = Diags.getCustomDiagID(
3426 DiagnosticsEngine::Error,
3427 "cannot mangle this dependent fixed-length SVE vector type yet");
3428 Diags.Report(T->getAttributeLoc(), DiagID);
3429}
3430
3431// GNU extension: vector types
3432// <type> ::= <vector-type>
3433// <vector-type> ::= Dv <positive dimension number> _
3434// <extended element type>
3435// ::= Dv [<dimension expression>] _ <element type>
3436// <extended element type> ::= <element type>
3437// ::= p # AltiVec vector pixel
3438// ::= b # Altivec vector bool
3439void CXXNameMangler::mangleType(const VectorType *T) {
3440 if ((T->getVectorKind() == VectorType::NeonVector ||
3441 T->getVectorKind() == VectorType::NeonPolyVector)) {
3442 llvm::Triple Target = getASTContext().getTargetInfo().getTriple();
3443 llvm::Triple::ArchType Arch =
3444 getASTContext().getTargetInfo().getTriple().getArch();
3445 if ((Arch == llvm::Triple::aarch64 ||
3446 Arch == llvm::Triple::aarch64_be) && !Target.isOSDarwin())
3447 mangleAArch64NeonVectorType(T);
3448 else
3449 mangleNeonVectorType(T);
3450 return;
3451 } else if (T->getVectorKind() == VectorType::SveFixedLengthDataVector ||
3452 T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) {
3453 mangleAArch64FixedSveVectorType(T);
3454 return;
3455 }
3456 Out << "Dv" << T->getNumElements() << '_';
3457 if (T->getVectorKind() == VectorType::AltiVecPixel)
3458 Out << 'p';
3459 else if (T->getVectorKind() == VectorType::AltiVecBool)
3460 Out << 'b';
3461 else
3462 mangleType(T->getElementType());
3463}
3464
3465void CXXNameMangler::mangleType(const DependentVectorType *T) {
3466 if ((T->getVectorKind() == VectorType::NeonVector ||
3467 T->getVectorKind() == VectorType::NeonPolyVector)) {
3468 llvm::Triple Target = getASTContext().getTargetInfo().getTriple();
3469 llvm::Triple::ArchType Arch =
3470 getASTContext().getTargetInfo().getTriple().getArch();
3471 if ((Arch == llvm::Triple::aarch64 || Arch == llvm::Triple::aarch64_be) &&
3472 !Target.isOSDarwin())
3473 mangleAArch64NeonVectorType(T);
3474 else
3475 mangleNeonVectorType(T);
3476 return;
3477 } else if (T->getVectorKind() == VectorType::SveFixedLengthDataVector ||
3478 T->getVectorKind() == VectorType::SveFixedLengthPredicateVector) {
3479 mangleAArch64FixedSveVectorType(T);
3480 return;
3481 }
3482
3483 Out << "Dv";
3484 mangleExpression(T->getSizeExpr());
3485 Out << '_';
3486 if (T->getVectorKind() == VectorType::AltiVecPixel)
3487 Out << 'p';
3488 else if (T->getVectorKind() == VectorType::AltiVecBool)
3489 Out << 'b';
3490 else
3491 mangleType(T->getElementType());
3492}
3493
3494void CXXNameMangler::mangleType(const ExtVectorType *T) {
3495 mangleType(static_cast<const VectorType*>(T));
3496}
3497void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) {
3498 Out << "Dv";
3499 mangleExpression(T->getSizeExpr());
3500 Out << '_';
3501 mangleType(T->getElementType());
3502}
3503
3504void CXXNameMangler::mangleType(const ConstantMatrixType *T) {
3505 // Mangle matrix types as a vendor extended type:
3506 // u<Len>matrix_typeI<Rows><Columns><element type>E
3507
3508 StringRef VendorQualifier = "matrix_type";
3509 Out << "u" << VendorQualifier.size() << VendorQualifier;
3510
3511 Out << "I";
3512 auto &ASTCtx = getASTContext();
3513 unsigned BitWidth = ASTCtx.getTypeSize(ASTCtx.getSizeType());
3514 llvm::APSInt Rows(BitWidth);
3515 Rows = T->getNumRows();
3516 mangleIntegerLiteral(ASTCtx.getSizeType(), Rows);
3517 llvm::APSInt Columns(BitWidth);
3518 Columns = T->getNumColumns();
3519 mangleIntegerLiteral(ASTCtx.getSizeType(), Columns);
3520 mangleType(T->getElementType());
3521 Out << "E";
3522}
3523
3524void CXXNameMangler::mangleType(const DependentSizedMatrixType *T) {
3525 // Mangle matrix types as a vendor extended type:
3526 // u<Len>matrix_typeI<row expr><column expr><element type>E
3527 StringRef VendorQualifier = "matrix_type";
3528 Out << "u" << VendorQualifier.size() << VendorQualifier;
3529
3530 Out << "I";
3531 mangleTemplateArg(T->getRowExpr(), false);
3532 mangleTemplateArg(T->getColumnExpr(), false);
3533 mangleType(T->getElementType());
3534 Out << "E";
3535}
3536
3537void CXXNameMangler::mangleType(const DependentAddressSpaceType *T) {
3538 SplitQualType split = T->getPointeeType().split();
3539 mangleQualifiers(split.Quals, T);
3540 mangleType(QualType(split.Ty, 0));
3541}
3542
3543void CXXNameMangler::mangleType(const PackExpansionType *T) {
3544 // <type> ::= Dp <type> # pack expansion (C++0x)
3545 Out << "Dp";
3546 mangleType(T->getPattern());
3547}
3548
3549void CXXNameMangler::mangleType(const ObjCInterfaceType *T) {
3550 mangleSourceName(T->getDecl()->getIdentifier());
3551}
3552
3553void CXXNameMangler::mangleType(const ObjCObjectType *T) {
3554 // Treat __kindof as a vendor extended type qualifier.
3555 if (T->isKindOfType())
3556 Out << "U8__kindof";
3557
3558 if (!T->qual_empty()) {
3559 // Mangle protocol qualifiers.
3560 SmallString<64> QualStr;
3561 llvm::raw_svector_ostream QualOS(QualStr);
3562 QualOS << "objcproto";
3563 for (const auto *I : T->quals()) {
3564 StringRef name = I->getName();
3565 QualOS << name.size() << name;
3566 }
3567 Out << 'U' << QualStr.size() << QualStr;
3568 }
3569
3570 mangleType(T->getBaseType());
3571
3572 if (T->isSpecialized()) {
3573 // Mangle type arguments as I <type>+ E
3574 Out << 'I';
3575 for (auto typeArg : T->getTypeArgs())
3576 mangleType(typeArg);
3577 Out << 'E';
3578 }
3579}
3580
3581void CXXNameMangler::mangleType(const BlockPointerType *T) {
3582 Out << "U13block_pointer";
3583 mangleType(T->getPointeeType());
3584}
3585
3586void CXXNameMangler::mangleType(const InjectedClassNameType *T) {
3587 // Mangle injected class name types as if the user had written the
3588 // specialization out fully. It may not actually be possible to see
3589 // this mangling, though.
3590 mangleType(T->getInjectedSpecializationType());
3591}
3592
3593void CXXNameMangler::mangleType(const TemplateSpecializationType *T) {
3594 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) {
3595 mangleTemplateName(TD, T->getArgs(), T->getNumArgs());
3596 } else {
3597 if (mangleSubstitution(QualType(T, 0)))
3598 return;
3599
3600 mangleTemplatePrefix(T->getTemplateName());
3601
3602 // FIXME: GCC does not appear to mangle the template arguments when
3603 // the template in question is a dependent template name. Should we
3604 // emulate that badness?
3605 mangleTemplateArgs(T->getTemplateName(), T->getArgs(), T->getNumArgs());
3606 addSubstitution(QualType(T, 0));
3607 }
3608}
3609
3610void CXXNameMangler::mangleType(const DependentNameType *T) {
3611 // Proposal by cxx-abi-dev, 2014-03-26
3612 // <class-enum-type> ::= <name> # non-dependent or dependent type name or
3613 // # dependent elaborated type specifier using
3614 // # 'typename'
3615 // ::= Ts <name> # dependent elaborated type specifier using
3616 // # 'struct' or 'class'
3617 // ::= Tu <name> # dependent elaborated type specifier using
3618 // # 'union'
3619 // ::= Te <name> # dependent elaborated type specifier using
3620 // # 'enum'
3621 switch (T->getKeyword()) {
3622 case ETK_None:
3623 case ETK_Typename:
3624 break;
3625 case ETK_Struct:
3626 case ETK_Class:
3627 case ETK_Interface:
3628 Out << "Ts";
3629 break;
3630 case ETK_Union:
3631 Out << "Tu";
3632 break;
3633 case ETK_Enum:
3634 Out << "Te";
3635 break;
3636 }
3637 // Typename types are always nested
3638 Out << 'N';
3639 manglePrefix(T->getQualifier());
3640 mangleSourceName(T->getIdentifier());
3641 Out << 'E';
3642}
3643
3644void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) {
3645 // Dependently-scoped template types are nested if they have a prefix.
3646 Out << 'N';
3647
3648 // TODO: avoid making this TemplateName.
3649 TemplateName Prefix =
3650 getASTContext().getDependentTemplateName(T->getQualifier(),
3651 T->getIdentifier());
3652 mangleTemplatePrefix(Prefix);
3653
3654 // FIXME: GCC does not appear to mangle the template arguments when
3655 // the template in question is a dependent template name. Should we
3656 // emulate that badness?
3657 mangleTemplateArgs(Prefix, T->getArgs(), T->getNumArgs());
3658 Out << 'E';
3659}
3660
3661void CXXNameMangler::mangleType(const TypeOfType *T) {
3662 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3663 // "extension with parameters" mangling.
3664 Out << "u6typeof";
3665}
3666
3667void CXXNameMangler::mangleType(const TypeOfExprType *T) {
3668 // FIXME: this is pretty unsatisfactory, but there isn't an obvious
3669 // "extension with parameters" mangling.
3670 Out << "u6typeof";
3671}
3672
3673void CXXNameMangler::mangleType(const DecltypeType *T) {
3674 Expr *E = T->getUnderlyingExpr();
3675
3676 // type ::= Dt <expression> E # decltype of an id-expression
3677 // # or class member access
3678 // ::= DT <expression> E # decltype of an expression
3679
3680 // This purports to be an exhaustive list of id-expressions and
3681 // class member accesses. Note that we do not ignore parentheses;
3682 // parentheses change the semantics of decltype for these
3683 // expressions (and cause the mangler to use the other form).
3684 if (isa<DeclRefExpr>(E) ||
3685 isa<MemberExpr>(E) ||
3686 isa<UnresolvedLookupExpr>(E) ||
3687 isa<DependentScopeDeclRefExpr>(E) ||
3688 isa<CXXDependentScopeMemberExpr>(E) ||
3689 isa<UnresolvedMemberExpr>(E))
3690 Out << "Dt";
3691 else
3692 Out << "DT";
3693 mangleExpression(E);
3694 Out << 'E';
3695}
3696
3697void CXXNameMangler::mangleType(const UnaryTransformType *T) {
3698 // If this is dependent, we need to record that. If not, we simply
3699 // mangle it as the underlying type since they are equivalent.
3700 if (T->isDependentType()) {
3701 Out << 'U';
3702
3703 switch (T->getUTTKind()) {
3704 case UnaryTransformType::EnumUnderlyingType:
3705 Out << "3eut";
3706 break;
3707 }
3708 }
3709
3710 mangleType(T->getBaseType());
3711}
3712
3713void CXXNameMangler::mangleType(const AutoType *T) {
3714 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3715, __PRETTY_FUNCTION__))
3715 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3715, __PRETTY_FUNCTION__))
;
3716 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3717, __PRETTY_FUNCTION__))
3717 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3717, __PRETTY_FUNCTION__))
;
3718 // <builtin-type> ::= Da # auto
3719 // ::= Dc # decltype(auto)
3720 Out << (T->isDecltypeAuto() ? "Dc" : "Da");
3721}
3722
3723void CXXNameMangler::mangleType(const DeducedTemplateSpecializationType *T) {
3724 QualType Deduced = T->getDeducedType();
3725 if (!Deduced.isNull())
3726 return mangleType(Deduced);
3727
3728 TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl();
3729 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3729, __PRETTY_FUNCTION__))
;
3730
3731 if (mangleSubstitution(TD))
3732 return;
3733
3734 mangleName(GlobalDecl(TD));
3735 addSubstitution(TD);
3736}
3737
3738void CXXNameMangler::mangleType(const AtomicType *T) {
3739 // <type> ::= U <source-name> <type> # vendor extended type qualifier
3740 // (Until there's a standardized mangling...)
3741 Out << "U7_Atomic";
3742 mangleType(T->getValueType());
3743}
3744
3745void CXXNameMangler::mangleType(const PipeType *T) {
3746 // Pipe type mangling rules are described in SPIR 2.0 specification
3747 // A.1 Data types and A.3 Summary of changes
3748 // <type> ::= 8ocl_pipe
3749 Out << "8ocl_pipe";
3750}
3751
3752void CXXNameMangler::mangleType(const ExtIntType *T) {
3753 Out << "U7_ExtInt";
3754 llvm::APSInt BW(32, true);
3755 BW = T->getNumBits();
3756 TemplateArgument TA(Context.getASTContext(), BW, getASTContext().IntTy);
3757 mangleTemplateArgs(TemplateName(), &TA, 1);
3758 if (T->isUnsigned())
3759 Out << "j";
3760 else
3761 Out << "i";
3762}
3763
3764void CXXNameMangler::mangleType(const DependentExtIntType *T) {
3765 Out << "U7_ExtInt";
3766 TemplateArgument TA(T->getNumBitsExpr());
3767 mangleTemplateArgs(TemplateName(), &TA, 1);
3768 if (T->isUnsigned())
3769 Out << "j";
3770 else
3771 Out << "i";
3772}
3773
3774void CXXNameMangler::mangleIntegerLiteral(QualType T,
3775 const llvm::APSInt &Value) {
3776 // <expr-primary> ::= L <type> <value number> E # integer literal
3777 Out << 'L';
3778
3779 mangleType(T);
3780 if (T->isBooleanType()) {
3781 // Boolean values are encoded as 0/1.
3782 Out << (Value.getBoolValue() ? '1' : '0');
3783 } else {
3784 mangleNumber(Value);
3785 }
3786 Out << 'E';
3787
3788}
3789
3790void CXXNameMangler::mangleMemberExprBase(const Expr *Base, bool IsArrow) {
3791 // Ignore member expressions involving anonymous unions.
3792 while (const auto *RT = Base->getType()->getAs<RecordType>()) {
3793 if (!RT->getDecl()->isAnonymousStructOrUnion())
3794 break;
3795 const auto *ME = dyn_cast<MemberExpr>(Base);
3796 if (!ME)
3797 break;
3798 Base = ME->getBase();
3799 IsArrow = ME->isArrow();
3800 }
3801
3802 if (Base->isImplicitCXXThis()) {
3803 // Note: GCC mangles member expressions to the implicit 'this' as
3804 // *this., whereas we represent them as this->. The Itanium C++ ABI
3805 // does not specify anything here, so we follow GCC.
3806 Out << "dtdefpT";
3807 } else {
3808 Out << (IsArrow ? "pt" : "dt");
3809 mangleExpression(Base);
3810 }
3811}
3812
3813/// Mangles a member expression.
3814void CXXNameMangler::mangleMemberExpr(const Expr *base,
3815 bool isArrow,
3816 NestedNameSpecifier *qualifier,
3817 NamedDecl *firstQualifierLookup,
3818 DeclarationName member,
3819 const TemplateArgumentLoc *TemplateArgs,
3820 unsigned NumTemplateArgs,
3821 unsigned arity) {
3822 // <expression> ::= dt <expression> <unresolved-name>
3823 // ::= pt <expression> <unresolved-name>
3824 if (base)
3825 mangleMemberExprBase(base, isArrow);
3826 mangleUnresolvedName(qualifier, member, TemplateArgs, NumTemplateArgs, arity);
3827}
3828
3829/// Look at the callee of the given call expression and determine if
3830/// it's a parenthesized id-expression which would have triggered ADL
3831/// otherwise.
3832static bool isParenthesizedADLCallee(const CallExpr *call) {
3833 const Expr *callee = call->getCallee();
3834 const Expr *fn = callee->IgnoreParens();
3835
3836 // Must be parenthesized. IgnoreParens() skips __extension__ nodes,
3837 // too, but for those to appear in the callee, it would have to be
3838 // parenthesized.
3839 if (callee == fn) return false;
3840
3841 // Must be an unresolved lookup.
3842 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn);
3843 if (!lookup) return false;
3844
3845 assert(!lookup->requiresADL())((!lookup->requiresADL()) ? static_cast<void> (0) : __assert_fail
("!lookup->requiresADL()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3845, __PRETTY_FUNCTION__))
;
3846
3847 // Must be an unqualified lookup.
3848 if (lookup->getQualifier()) return false;
3849
3850 // Must not have found a class member. Note that if one is a class
3851 // member, they're all class members.
3852 if (lookup->getNumDecls() > 0 &&
3853 (*lookup->decls_begin())->isCXXClassMember())
3854 return false;
3855
3856 // Otherwise, ADL would have been triggered.
3857 return true;
3858}
3859
3860void CXXNameMangler::mangleCastExpression(const Expr *E, StringRef CastEncoding) {
3861 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E);
3862 Out << CastEncoding;
3863 mangleType(ECE->getType());
3864 mangleExpression(ECE->getSubExpr());
3865}
3866
3867void CXXNameMangler::mangleInitListElements(const InitListExpr *InitList) {
3868 if (auto *Syntactic = InitList->getSyntacticForm())
3869 InitList = Syntactic;
3870 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i)
3871 mangleExpression(InitList->getInit(i));
3872}
3873
3874void CXXNameMangler::mangleDeclRefExpr(const NamedDecl *D) {
3875 switch (D->getKind()) {
3876 default:
3877 // <expr-primary> ::= L <mangled-name> E # external name
3878 Out << 'L';
3879 mangle(D);
3880 Out << 'E';
3881 break;
3882
3883 case Decl::ParmVar:
3884 mangleFunctionParam(cast<ParmVarDecl>(D));
3885 break;
3886
3887 case Decl::EnumConstant: {
3888 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D);
3889 mangleIntegerLiteral(ED->getType(), ED->getInitVal());
3890 break;
3891 }
3892
3893 case Decl::NonTypeTemplateParm:
3894 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D);
3895 mangleTemplateParameter(PD->getDepth(), PD->getIndex());
3896 break;
3897 }
3898}
3899
3900void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
3901 // <expression> ::= <unary operator-name> <expression>
3902 // ::= <binary operator-name> <expression> <expression>
3903 // ::= <trinary operator-name> <expression> <expression> <expression>
3904 // ::= cv <type> expression # conversion with one argument
3905 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments
3906 // ::= dc <type> <expression> # dynamic_cast<type> (expression)
3907 // ::= sc <type> <expression> # static_cast<type> (expression)
3908 // ::= cc <type> <expression> # const_cast<type> (expression)
3909 // ::= rc <type> <expression> # reinterpret_cast<type> (expression)
3910 // ::= st <type> # sizeof (a type)
3911 // ::= at <type> # alignof (a type)
3912 // ::= <template-param>
3913 // ::= <function-param>
3914 // ::= sr <type> <unqualified-name> # dependent name
3915 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id
3916 // ::= ds <expression> <expression> # expr.*expr
3917 // ::= sZ <template-param> # size of a parameter pack
3918 // ::= sZ <function-param> # size of a function parameter pack
3919 // ::= <expr-primary>
3920 // <expr-primary> ::= L <type> <value number> E # integer literal
3921 // ::= L <type <value float> E # floating literal
3922 // ::= L <mangled-name> E # external name
3923 // ::= fpT # 'this' expression
3924 QualType ImplicitlyConvertedToType;
3925
3926recurse:
3927 switch (E->getStmtClass()) {
3928 case Expr::NoStmtClass:
3929#define ABSTRACT_STMT(Type)
3930#define EXPR(Type, Base)
3931#define STMT(Type, Base) \
3932 case Expr::Type##Class:
3933#include "clang/AST/StmtNodes.inc"
3934 // fallthrough
3935
3936 // These all can only appear in local or variable-initialization
3937 // contexts and so should never appear in a mangling.
3938 case Expr::AddrLabelExprClass:
3939 case Expr::DesignatedInitUpdateExprClass:
3940 case Expr::ImplicitValueInitExprClass:
3941 case Expr::ArrayInitLoopExprClass:
3942 case Expr::ArrayInitIndexExprClass:
3943 case Expr::NoInitExprClass:
3944 case Expr::ParenListExprClass:
3945 case Expr::LambdaExprClass:
3946 case Expr::MSPropertyRefExprClass:
3947 case Expr::MSPropertySubscriptExprClass:
3948 case Expr::TypoExprClass: // This should no longer exist in the AST by now.
3949 case Expr::RecoveryExprClass:
3950 case Expr::OMPArraySectionExprClass:
3951 case Expr::OMPArrayShapingExprClass:
3952 case Expr::OMPIteratorExprClass:
3953 case Expr::CXXInheritedCtorInitExprClass:
3954 llvm_unreachable("unexpected statement kind")::llvm::llvm_unreachable_internal("unexpected statement kind"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 3954)
;
3955
3956 case Expr::ConstantExprClass:
3957 E = cast<ConstantExpr>(E)->getSubExpr();
3958 goto recurse;
3959
3960 // FIXME: invent manglings for all these.
3961 case Expr::BlockExprClass:
3962 case Expr::ChooseExprClass:
3963 case Expr::CompoundLiteralExprClass:
3964 case Expr::ExtVectorElementExprClass:
3965 case Expr::GenericSelectionExprClass:
3966 case Expr::ObjCEncodeExprClass:
3967 case Expr::ObjCIsaExprClass:
3968 case Expr::ObjCIvarRefExprClass:
3969 case Expr::ObjCMessageExprClass:
3970 case Expr::ObjCPropertyRefExprClass:
3971 case Expr::ObjCProtocolExprClass:
3972 case Expr::ObjCSelectorExprClass:
3973 case Expr::ObjCStringLiteralClass:
3974 case Expr::ObjCBoxedExprClass:
3975 case Expr::ObjCArrayLiteralClass:
3976 case Expr::ObjCDictionaryLiteralClass:
3977 case Expr::ObjCSubscriptRefExprClass:
3978 case Expr::ObjCIndirectCopyRestoreExprClass:
3979 case Expr::ObjCAvailabilityCheckExprClass:
3980 case Expr::OffsetOfExprClass:
3981 case Expr::PredefinedExprClass:
3982 case Expr::ShuffleVectorExprClass:
3983 case Expr::ConvertVectorExprClass:
3984 case Expr::StmtExprClass:
3985 case Expr::TypeTraitExprClass:
3986 case Expr::RequiresExprClass:
3987 case Expr::ArrayTypeTraitExprClass:
3988 case Expr::ExpressionTraitExprClass:
3989 case Expr::VAArgExprClass:
3990 case Expr::CUDAKernelCallExprClass:
3991 case Expr::AsTypeExprClass:
3992 case Expr::PseudoObjectExprClass:
3993 case Expr::AtomicExprClass:
3994 case Expr::SourceLocExprClass:
3995 case Expr::BuiltinBitCastExprClass:
3996 {
3997 if (!NullOut) {
3998 // As bad as this diagnostic is, it's better than crashing.
3999 DiagnosticsEngine &Diags = Context.getDiags();
4000 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
4001 "cannot yet mangle expression type %0");
4002 Diags.Report(E->getExprLoc(), DiagID)
4003 << E->getStmtClassName() << E->getSourceRange();
4004 }
4005 break;
4006 }
4007
4008 case Expr::CXXUuidofExprClass: {
4009 const CXXUuidofExpr *UE = cast<CXXUuidofExpr>(E);
4010 if (UE->isTypeOperand()) {
4011 QualType UuidT = UE->getTypeOperand(Context.getASTContext());
4012 Out << "u8__uuidoft";
4013 mangleType(UuidT);
4014 } else {
4015 Expr *UuidExp = UE->getExprOperand();
4016 Out << "u8__uuidofz";
4017 mangleExpression(UuidExp, Arity);
4018 }
4019 break;
4020 }
4021
4022 // Even gcc-4.5 doesn't mangle this.
4023 case Expr::BinaryConditionalOperatorClass: {
4024 DiagnosticsEngine &Diags = Context.getDiags();
4025 unsigned DiagID =
4026 Diags.getCustomDiagID(DiagnosticsEngine::Error,
4027 "?: operator with omitted middle operand cannot be mangled");
4028 Diags.Report(E->getExprLoc(), DiagID)
4029 << E->getStmtClassName() << E->getSourceRange();
4030 break;
4031 }
4032
4033 // These are used for internal purposes and cannot be meaningfully mangled.
4034 case Expr::OpaqueValueExprClass:
4035 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?")::llvm::llvm_unreachable_internal("cannot mangle opaque value; mangling wrong thing?"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4035)
;
4036
4037 case Expr::InitListExprClass: {
4038 Out << "il";
4039 mangleInitListElements(cast<InitListExpr>(E));
4040 Out << "E";
4041 break;
4042 }
4043
4044 case Expr::DesignatedInitExprClass: {
4045 auto *DIE = cast<DesignatedInitExpr>(E);
4046 for (const auto &Designator : DIE->designators()) {
4047 if (Designator.isFieldDesignator()) {
4048 Out << "di";
4049 mangleSourceName(Designator.getFieldName());
4050 } else if (Designator.isArrayDesignator()) {
4051 Out << "dx";
4052 mangleExpression(DIE->getArrayIndex(Designator));
4053 } else {
4054 assert(Designator.isArrayRangeDesignator() &&((Designator.isArrayRangeDesignator() && "unknown designator kind"
) ? static_cast<void> (0) : __assert_fail ("Designator.isArrayRangeDesignator() && \"unknown designator kind\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4055, __PRETTY_FUNCTION__))
4055 "unknown designator kind")((Designator.isArrayRangeDesignator() && "unknown designator kind"
) ? static_cast<void> (0) : __assert_fail ("Designator.isArrayRangeDesignator() && \"unknown designator kind\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4055, __PRETTY_FUNCTION__))
;
4056 Out << "dX";
4057 mangleExpression(DIE->getArrayRangeStart(Designator));
4058 mangleExpression(DIE->getArrayRangeEnd(Designator));
4059 }
4060 }
4061 mangleExpression(DIE->getInit());
4062 break;
4063 }
4064
4065 case Expr::CXXDefaultArgExprClass:
4066 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity);
4067 break;
4068
4069 case Expr::CXXDefaultInitExprClass:
4070 mangleExpression(cast<CXXDefaultInitExpr>(E)->getExpr(), Arity);
4071 break;
4072
4073 case Expr::CXXStdInitializerListExprClass:
4074 mangleExpression(cast<CXXStdInitializerListExpr>(E)->getSubExpr(), Arity);
4075 break;
4076
4077 case Expr::SubstNonTypeTemplateParmExprClass:
4078 mangleExpression(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(),
4079 Arity);
4080 break;
4081
4082 case Expr::UserDefinedLiteralClass:
4083 // We follow g++'s approach of mangling a UDL as a call to the literal
4084 // operator.
4085 case Expr::CXXMemberCallExprClass: // fallthrough
4086 case Expr::CallExprClass: {
4087 const CallExpr *CE = cast<CallExpr>(E);
4088
4089 // <expression> ::= cp <simple-id> <expression>* E
4090 // We use this mangling only when the call would use ADL except
4091 // for being parenthesized. Per discussion with David
4092 // Vandervoorde, 2011.04.25.
4093 if (isParenthesizedADLCallee(CE)) {
4094 Out << "cp";
4095 // The callee here is a parenthesized UnresolvedLookupExpr with
4096 // no qualifier and should always get mangled as a <simple-id>
4097 // anyway.
4098
4099 // <expression> ::= cl <expression>* E
4100 } else {
4101 Out << "cl";
4102 }
4103
4104 unsigned CallArity = CE->getNumArgs();
4105 for (const Expr *Arg : CE->arguments())
4106 if (isa<PackExpansionExpr>(Arg))
4107 CallArity = UnknownArity;
4108
4109 mangleExpression(CE->getCallee(), CallArity);
4110 for (const Expr *Arg : CE->arguments())
4111 mangleExpression(Arg);
4112 Out << 'E';
4113 break;
4114 }
4115
4116 case Expr::CXXNewExprClass: {
4117 const CXXNewExpr *New = cast<CXXNewExpr>(E);
4118 if (New->isGlobalNew()) Out << "gs";
4119 Out << (New->isArray() ? "na" : "nw");
4120 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(),
4121 E = New->placement_arg_end(); I != E; ++I)
4122 mangleExpression(*I);
4123 Out << '_';
4124 mangleType(New->getAllocatedType());
4125 if (New->hasInitializer()) {
4126 if (New->getInitializationStyle() == CXXNewExpr::ListInit)
4127 Out << "il";
4128 else
4129 Out << "pi";
4130 const Expr *Init = New->getInitializer();
4131 if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) {
4132 // Directly inline the initializers.
4133 for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(),
4134 E = CCE->arg_end();
4135 I != E; ++I)
4136 mangleExpression(*I);
4137 } else if (const ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) {
4138 for (unsigned i = 0, e = PLE->getNumExprs(); i != e; ++i)
4139 mangleExpression(PLE->getExpr(i));
4140 } else if (New->getInitializationStyle() == CXXNewExpr::ListInit &&
4141 isa<InitListExpr>(Init)) {
4142 // Only take InitListExprs apart for list-initialization.
4143 mangleInitListElements(cast<InitListExpr>(Init));
4144 } else
4145 mangleExpression(Init);
4146 }
4147 Out << 'E';
4148 break;
4149 }
4150
4151 case Expr::CXXPseudoDestructorExprClass: {
4152 const auto *PDE = cast<CXXPseudoDestructorExpr>(E);
4153 if (const Expr *Base = PDE->getBase())
4154 mangleMemberExprBase(Base, PDE->isArrow());
4155 NestedNameSpecifier *Qualifier = PDE->getQualifier();
4156 if (TypeSourceInfo *ScopeInfo = PDE->getScopeTypeInfo()) {
4157 if (Qualifier) {
4158 mangleUnresolvedPrefix(Qualifier,
4159 /*recursive=*/true);
4160 mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType());
4161 Out << 'E';
4162 } else {
4163 Out << "sr";
4164 if (!mangleUnresolvedTypeOrSimpleId(ScopeInfo->getType()))
4165 Out << 'E';
4166 }
4167 } else if (Qualifier) {
4168 mangleUnresolvedPrefix(Qualifier);
4169 }
4170 // <base-unresolved-name> ::= dn <destructor-name>
4171 Out << "dn";
4172 QualType DestroyedType = PDE->getDestroyedType();
4173 mangleUnresolvedTypeOrSimpleId(DestroyedType);
4174 break;
4175 }
4176
4177 case Expr::MemberExprClass: {
4178 const MemberExpr *ME = cast<MemberExpr>(E);
4179 mangleMemberExpr(ME->getBase(), ME->isArrow(),
4180 ME->getQualifier(), nullptr,
4181 ME->getMemberDecl()->getDeclName(),
4182 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4183 Arity);
4184 break;
4185 }
4186
4187 case Expr::UnresolvedMemberExprClass: {
4188 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E);
4189 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
4190 ME->isArrow(), ME->getQualifier(), nullptr,
4191 ME->getMemberName(),
4192 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4193 Arity);
4194 break;
4195 }
4196
4197 case Expr::CXXDependentScopeMemberExprClass: {
4198 const CXXDependentScopeMemberExpr *ME
4199 = cast<CXXDependentScopeMemberExpr>(E);
4200 mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
4201 ME->isArrow(), ME->getQualifier(),
4202 ME->getFirstQualifierFoundInScope(),
4203 ME->getMember(),
4204 ME->getTemplateArgs(), ME->getNumTemplateArgs(),
4205 Arity);
4206 break;
4207 }
4208
4209 case Expr::UnresolvedLookupExprClass: {
4210 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E);
4211 mangleUnresolvedName(ULE->getQualifier(), ULE->getName(),
4212 ULE->getTemplateArgs(), ULE->getNumTemplateArgs(),
4213 Arity);
4214 break;
4215 }
4216
4217 case Expr::CXXUnresolvedConstructExprClass: {
4218 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E);
4219 unsigned N = CE->getNumArgs();
4220
4221 if (CE->isListInitialization()) {
4222 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4222, __PRETTY_FUNCTION__))
;
4223 auto *IL = cast<InitListExpr>(CE->getArg(0));
4224 Out << "tl";
4225 mangleType(CE->getType());
4226 mangleInitListElements(IL);
4227 Out << "E";
4228 return;
4229 }
4230
4231 Out << "cv";
4232 mangleType(CE->getType());
4233 if (N != 1) Out << '_';
4234 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I));
4235 if (N != 1) Out << 'E';
4236 break;
4237 }
4238
4239 case Expr::CXXConstructExprClass: {
4240 const auto *CE = cast<CXXConstructExpr>(E);
4241 if (!CE->isListInitialization() || CE->isStdInitListInitialization()) {
4242 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4245, __PRETTY_FUNCTION__))
4243 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4245, __PRETTY_FUNCTION__))
4244 (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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4245, __PRETTY_FUNCTION__))
4245 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4245, __PRETTY_FUNCTION__))
;
4246 return mangleExpression(cast<CXXConstructExpr>(E)->getArg(0));
4247 }
4248 Out << "il";
4249 for (auto *E : CE->arguments())
4250 mangleExpression(E);
4251 Out << "E";
4252 break;
4253 }
4254
4255 case Expr::CXXTemporaryObjectExprClass: {
4256 const auto *CE = cast<CXXTemporaryObjectExpr>(E);
4257 unsigned N = CE->getNumArgs();
4258 bool List = CE->isListInitialization();
4259
4260 if (List)
4261 Out << "tl";
4262 else
4263 Out << "cv";
4264 mangleType(CE->getType());
4265 if (!List && N != 1)
4266 Out << '_';
4267 if (CE->isStdInitListInitialization()) {
4268 // We implicitly created a std::initializer_list<T> for the first argument
4269 // of a constructor of type U in an expression of the form U{a, b, c}.
4270 // Strip all the semantic gunk off the initializer list.
4271 auto *SILE =
4272 cast<CXXStdInitializerListExpr>(CE->getArg(0)->IgnoreImplicit());
4273 auto *ILE = cast<InitListExpr>(SILE->getSubExpr()->IgnoreImplicit());
4274 mangleInitListElements(ILE);
4275 } else {
4276 for (auto *E : CE->arguments())
4277 mangleExpression(E);
4278 }
4279 if (List || N != 1)
4280 Out << 'E';
4281 break;
4282 }
4283
4284 case Expr::CXXScalarValueInitExprClass:
4285 Out << "cv";
4286 mangleType(E->getType());
4287 Out << "_E";
4288 break;
4289
4290 case Expr::CXXNoexceptExprClass:
4291 Out << "nx";
4292 mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand());
4293 break;
4294
4295 case Expr::UnaryExprOrTypeTraitExprClass: {
4296 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E);
4297
4298 if (!SAE->isInstantiationDependent()) {
4299 // Itanium C++ ABI:
4300 // If the operand of a sizeof or alignof operator is not
4301 // instantiation-dependent it is encoded as an integer literal
4302 // reflecting the result of the operator.
4303 //
4304 // If the result of the operator is implicitly converted to a known
4305 // integer type, that type is used for the literal; otherwise, the type
4306 // of std::size_t or std::ptrdiff_t is used.
4307 QualType T = (ImplicitlyConvertedToType.isNull() ||
4308 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType()
4309 : ImplicitlyConvertedToType;
4310 llvm::APSInt V = SAE->EvaluateKnownConstInt(Context.getASTContext());
4311 mangleIntegerLiteral(T, V);
4312 break;
4313 }
4314
4315 switch(SAE->getKind()) {
4316 case UETT_SizeOf:
4317 Out << 's';
4318 break;
4319 case UETT_PreferredAlignOf:
4320 case UETT_AlignOf:
4321 Out << 'a';
4322 break;
4323 case UETT_VecStep: {
4324 DiagnosticsEngine &Diags = Context.getDiags();
4325 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
4326 "cannot yet mangle vec_step expression");
4327 Diags.Report(DiagID);
4328 return;
4329 }
4330 case UETT_OpenMPRequiredSimdAlign: {
4331 DiagnosticsEngine &Diags = Context.getDiags();
4332 unsigned DiagID = Diags.getCustomDiagID(
4333 DiagnosticsEngine::Error,
4334 "cannot yet mangle __builtin_omp_required_simd_align expression");
4335 Diags.Report(DiagID);
4336 return;
4337 }
4338 }
4339 if (SAE->isArgumentType()) {
4340 Out << 't';
4341 mangleType(SAE->getArgumentType());
4342 } else {
4343 Out << 'z';
4344 mangleExpression(SAE->getArgumentExpr());
4345 }
4346 break;
4347 }
4348
4349 case Expr::CXXThrowExprClass: {
4350 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E);
4351 // <expression> ::= tw <expression> # throw expression
4352 // ::= tr # rethrow
4353 if (TE->getSubExpr()) {
4354 Out << "tw";
4355 mangleExpression(TE->getSubExpr());
4356 } else {
4357 Out << "tr";
4358 }
4359 break;
4360 }
4361
4362 case Expr::CXXTypeidExprClass: {
4363 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E);
4364 // <expression> ::= ti <type> # typeid (type)
4365 // ::= te <expression> # typeid (expression)
4366 if (TIE->isTypeOperand()) {
4367 Out << "ti";
4368 mangleType(TIE->getTypeOperand(Context.getASTContext()));
4369 } else {
4370 Out << "te";
4371 mangleExpression(TIE->getExprOperand());
4372 }
4373 break;
4374 }
4375
4376 case Expr::CXXDeleteExprClass: {
4377 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E);
4378 // <expression> ::= [gs] dl <expression> # [::] delete expr
4379 // ::= [gs] da <expression> # [::] delete [] expr
4380 if (DE->isGlobalDelete()) Out << "gs";
4381 Out << (DE->isArrayForm() ? "da" : "dl");
4382 mangleExpression(DE->getArgument());
4383 break;
4384 }
4385
4386 case Expr::UnaryOperatorClass: {
4387 const UnaryOperator *UO = cast<UnaryOperator>(E);
4388 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()),
4389 /*Arity=*/1);
4390 mangleExpression(UO->getSubExpr());
4391 break;
4392 }
4393
4394 case Expr::ArraySubscriptExprClass: {
4395 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E);
4396
4397 // Array subscript is treated as a syntactically weird form of
4398 // binary operator.
4399 Out << "ix";
4400 mangleExpression(AE->getLHS());
4401 mangleExpression(AE->getRHS());
4402 break;
4403 }
4404
4405 case Expr::MatrixSubscriptExprClass: {
4406 const MatrixSubscriptExpr *ME = cast<MatrixSubscriptExpr>(E);
4407 Out << "ixix";
4408 mangleExpression(ME->getBase());
4409 mangleExpression(ME->getRowIdx());
4410 mangleExpression(ME->getColumnIdx());
4411 break;
4412 }
4413
4414 case Expr::CompoundAssignOperatorClass: // fallthrough
4415 case Expr::BinaryOperatorClass: {
4416 const BinaryOperator *BO = cast<BinaryOperator>(E);
4417 if (BO->getOpcode() == BO_PtrMemD)
4418 Out << "ds";
4419 else
4420 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()),
4421 /*Arity=*/2);
4422 mangleExpression(BO->getLHS());
4423 mangleExpression(BO->getRHS());
4424 break;
4425 }
4426
4427 case Expr::CXXRewrittenBinaryOperatorClass: {
4428 // The mangled form represents the original syntax.
4429 CXXRewrittenBinaryOperator::DecomposedForm Decomposed =
4430 cast<CXXRewrittenBinaryOperator>(E)->getDecomposedForm();
4431 mangleOperatorName(BinaryOperator::getOverloadedOperator(Decomposed.Opcode),
4432 /*Arity=*/2);
4433 mangleExpression(Decomposed.LHS);
4434 mangleExpression(Decomposed.RHS);
4435 break;
4436 }
4437
4438 case Expr::ConditionalOperatorClass: {
4439 const ConditionalOperator *CO = cast<ConditionalOperator>(E);
4440 mangleOperatorName(OO_Conditional, /*Arity=*/3);
4441 mangleExpression(CO->getCond());
4442 mangleExpression(CO->getLHS(), Arity);
4443 mangleExpression(CO->getRHS(), Arity);
4444 break;
4445 }
4446
4447 case Expr::ImplicitCastExprClass: {
4448 ImplicitlyConvertedToType = E->getType();
4449 E = cast<ImplicitCastExpr>(E)->getSubExpr();
4450 goto recurse;
4451 }
4452
4453 case Expr::ObjCBridgedCastExprClass: {
4454 // Mangle ownership casts as a vendor extended operator __bridge,
4455 // __bridge_transfer, or __bridge_retain.
4456 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName();
4457 Out << "v1U" << Kind.size() << Kind;
4458 }
4459 // Fall through to mangle the cast itself.
4460 LLVM_FALLTHROUGH[[gnu::fallthrough]];
4461
4462 case Expr::CStyleCastExprClass:
4463 mangleCastExpression(E, "cv");
4464 break;
4465
4466 case Expr::CXXFunctionalCastExprClass: {
4467 auto *Sub = cast<ExplicitCastExpr>(E)->getSubExpr()->IgnoreImplicit();
4468 // FIXME: Add isImplicit to CXXConstructExpr.
4469 if (auto *CCE = dyn_cast<CXXConstructExpr>(Sub))
4470 if (CCE->getParenOrBraceRange().isInvalid())
4471 Sub = CCE->getArg(0)->IgnoreImplicit();
4472 if (auto *StdInitList = dyn_cast<CXXStdInitializerListExpr>(Sub))
4473 Sub = StdInitList->getSubExpr()->IgnoreImplicit();
4474 if (auto *IL = dyn_cast<InitListExpr>(Sub)) {
4475 Out << "tl";
4476 mangleType(E->getType());
4477 mangleInitListElements(IL);
4478 Out << "E";
4479 } else {
4480 mangleCastExpression(E, "cv");
4481 }
4482 break;
4483 }
4484
4485 case Expr::CXXStaticCastExprClass:
4486 mangleCastExpression(E, "sc");
4487 break;
4488 case Expr::CXXDynamicCastExprClass:
4489 mangleCastExpression(E, "dc");
4490 break;
4491 case Expr::CXXReinterpretCastExprClass:
4492 mangleCastExpression(E, "rc");
4493 break;
4494 case Expr::CXXConstCastExprClass:
4495 mangleCastExpression(E, "cc");
4496 break;
4497 case Expr::CXXAddrspaceCastExprClass:
4498 mangleCastExpression(E, "ac");
4499 break;
4500
4501 case Expr::CXXOperatorCallExprClass: {
4502 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E);
4503 unsigned NumArgs = CE->getNumArgs();
4504 // A CXXOperatorCallExpr for OO_Arrow models only semantics, not syntax
4505 // (the enclosing MemberExpr covers the syntactic portion).
4506 if (CE->getOperator() != OO_Arrow)
4507 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs);
4508 // Mangle the arguments.
4509 for (unsigned i = 0; i != NumArgs; ++i)
4510 mangleExpression(CE->getArg(i));
4511 break;
4512 }
4513
4514 case Expr::ParenExprClass:
4515 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity);
4516 break;
4517
4518
4519 case Expr::ConceptSpecializationExprClass: {
4520 // <expr-primary> ::= L <mangled-name> E # external name
4521 Out << "L_Z";
4522 auto *CSE = cast<ConceptSpecializationExpr>(E);
4523 mangleTemplateName(CSE->getNamedConcept(),
4524 CSE->getTemplateArguments().data(),
4525 CSE->getTemplateArguments().size());
4526 Out << 'E';
4527 break;
4528 }
4529
4530 case Expr::DeclRefExprClass:
4531 mangleDeclRefExpr(cast<DeclRefExpr>(E)->getDecl());
4532 break;
4533
4534 case Expr::SubstNonTypeTemplateParmPackExprClass:
4535 // FIXME: not clear how to mangle this!
4536 // template <unsigned N...> class A {
4537 // template <class U...> void foo(U (&x)[N]...);
4538 // };
4539 Out << "_SUBSTPACK_";
4540 break;
4541
4542 case Expr::FunctionParmPackExprClass: {
4543 // FIXME: not clear how to mangle this!
4544 const FunctionParmPackExpr *FPPE = cast<FunctionParmPackExpr>(E);
4545 Out << "v110_SUBSTPACK";
4546 mangleDeclRefExpr(FPPE->getParameterPack());
4547 break;
4548 }
4549
4550 case Expr::DependentScopeDeclRefExprClass: {
4551 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E);
4552 mangleUnresolvedName(DRE->getQualifier(), DRE->getDeclName(),
4553 DRE->getTemplateArgs(), DRE->getNumTemplateArgs(),
4554 Arity);
4555 break;
4556 }
4557
4558 case Expr::CXXBindTemporaryExprClass:
4559 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr());
4560 break;
4561
4562 case Expr::ExprWithCleanupsClass:
4563 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity);
4564 break;
4565
4566 case Expr::FloatingLiteralClass: {
4567 const FloatingLiteral *FL = cast<FloatingLiteral>(E);
4568 mangleFloatLiteral(FL->getType(), FL->getValue());
4569 break;
4570 }
4571
4572 case Expr::FixedPointLiteralClass:
4573 mangleFixedPointLiteral();
4574 break;
4575
4576 case Expr::CharacterLiteralClass:
4577 Out << 'L';
4578 mangleType(E->getType());
4579 Out << cast<CharacterLiteral>(E)->getValue();
4580 Out << 'E';
4581 break;
4582
4583 // FIXME. __objc_yes/__objc_no are mangled same as true/false
4584 case Expr::ObjCBoolLiteralExprClass:
4585 Out << "Lb";
4586 Out << (cast<ObjCBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4587 Out << 'E';
4588 break;
4589
4590 case Expr::CXXBoolLiteralExprClass:
4591 Out << "Lb";
4592 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0');
4593 Out << 'E';
4594 break;
4595
4596 case Expr::IntegerLiteralClass: {
4597 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue());
4598 if (E->getType()->isSignedIntegerType())
4599 Value.setIsSigned(true);
4600 mangleIntegerLiteral(E->getType(), Value);
4601 break;
4602 }
4603
4604 case Expr::ImaginaryLiteralClass: {
4605 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E);
4606 // Mangle as if a complex literal.
4607 // Proposal from David Vandevoorde, 2010.06.30.
4608 Out << 'L';
4609 mangleType(E->getType());
4610 if (const FloatingLiteral *Imag =
4611 dyn_cast<FloatingLiteral>(IE->getSubExpr())) {
4612 // Mangle a floating-point zero of the appropriate type.
4613 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics()));
4614 Out << '_';
4615 mangleFloat(Imag->getValue());
4616 } else {
4617 Out << "0_";
4618 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue());
4619 if (IE->getSubExpr()->getType()->isSignedIntegerType())
4620 Value.setIsSigned(true);
4621 mangleNumber(Value);
4622 }
4623 Out << 'E';
4624 break;
4625 }
4626
4627 case Expr::StringLiteralClass: {
4628 // Revised proposal from David Vandervoorde, 2010.07.15.
4629 Out << 'L';
4630 assert(isa<ConstantArrayType>(E->getType()))((isa<ConstantArrayType>(E->getType())) ? static_cast
<void> (0) : __assert_fail ("isa<ConstantArrayType>(E->getType())"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4630, __PRETTY_FUNCTION__))
;
4631 mangleType(E->getType());
4632 Out << 'E';
4633 break;
4634 }
4635
4636 case Expr::GNUNullExprClass:
4637 // Mangle as if an integer literal 0.
4638 mangleIntegerLiteral(E->getType(), llvm::APSInt(32));
4639 break;
4640
4641 case Expr::CXXNullPtrLiteralExprClass: {
4642 Out << "LDnE";
4643 break;
4644 }
4645
4646 case Expr::PackExpansionExprClass:
4647 Out << "sp";
4648 mangleExpression(cast<PackExpansionExpr>(E)->getPattern());
4649 break;
4650
4651 case Expr::SizeOfPackExprClass: {
4652 auto *SPE = cast<SizeOfPackExpr>(E);
4653 if (SPE->isPartiallySubstituted()) {
4654 Out << "sP";
4655 for (const auto &A : SPE->getPartialArguments())
4656 mangleTemplateArg(A, false);
4657 Out << "E";
4658 break;
4659 }
4660
4661 Out << "sZ";
4662 const NamedDecl *Pack = SPE->getPack();
4663 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack))
4664 mangleTemplateParameter(TTP->getDepth(), TTP->getIndex());
4665 else if (const NonTypeTemplateParmDecl *NTTP
4666 = dyn_cast<NonTypeTemplateParmDecl>(Pack))
4667 mangleTemplateParameter(NTTP->getDepth(), NTTP->getIndex());
4668 else if (const TemplateTemplateParmDecl *TempTP
4669 = dyn_cast<TemplateTemplateParmDecl>(Pack))
4670 mangleTemplateParameter(TempTP->getDepth(), TempTP->getIndex());
4671 else
4672 mangleFunctionParam(cast<ParmVarDecl>(Pack));
4673 break;
4674 }
4675
4676 case Expr::MaterializeTemporaryExprClass: {
4677 mangleExpression(cast<MaterializeTemporaryExpr>(E)->getSubExpr());
4678 break;
4679 }
4680
4681 case Expr::CXXFoldExprClass: {
4682 auto *FE = cast<CXXFoldExpr>(E);
4683 if (FE->isLeftFold())
4684 Out << (FE->getInit() ? "fL" : "fl");
4685 else
4686 Out << (FE->getInit() ? "fR" : "fr");
4687
4688 if (FE->getOperator() == BO_PtrMemD)
4689 Out << "ds";
4690 else
4691 mangleOperatorName(
4692 BinaryOperator::getOverloadedOperator(FE->getOperator()),
4693 /*Arity=*/2);
4694
4695 if (FE->getLHS())
4696 mangleExpression(FE->getLHS());
4697 if (FE->getRHS())
4698 mangleExpression(FE->getRHS());
4699 break;
4700 }
4701
4702 case Expr::CXXThisExprClass:
4703 Out << "fpT";
4704 break;
4705
4706 case Expr::CoawaitExprClass:
4707 // FIXME: Propose a non-vendor mangling.
4708 Out << "v18co_await";
4709 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4710 break;
4711
4712 case Expr::DependentCoawaitExprClass:
4713 // FIXME: Propose a non-vendor mangling.
4714 Out << "v18co_await";
4715 mangleExpression(cast<DependentCoawaitExpr>(E)->getOperand());
4716 break;
4717
4718 case Expr::CoyieldExprClass:
4719 // FIXME: Propose a non-vendor mangling.
4720 Out << "v18co_yield";
4721 mangleExpression(cast<CoawaitExpr>(E)->getOperand());
4722 break;
4723 }
4724}
4725
4726/// Mangle an expression which refers to a parameter variable.
4727///
4728/// <expression> ::= <function-param>
4729/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0
4730/// <function-param> ::= fp <top-level CV-qualifiers>
4731/// <parameter-2 non-negative number> _ # L == 0, I > 0
4732/// <function-param> ::= fL <L-1 non-negative number>
4733/// p <top-level CV-qualifiers> _ # L > 0, I == 0
4734/// <function-param> ::= fL <L-1 non-negative number>
4735/// p <top-level CV-qualifiers>
4736/// <I-1 non-negative number> _ # L > 0, I > 0
4737///
4738/// L is the nesting depth of the parameter, defined as 1 if the
4739/// parameter comes from the innermost function prototype scope
4740/// enclosing the current context, 2 if from the next enclosing
4741/// function prototype scope, and so on, with one special case: if
4742/// we've processed the full parameter clause for the innermost
4743/// function type, then L is one less. This definition conveniently
4744/// makes it irrelevant whether a function's result type was written
4745/// trailing or leading, but is otherwise overly complicated; the
4746/// numbering was first designed without considering references to
4747/// parameter in locations other than return types, and then the
4748/// mangling had to be generalized without changing the existing
4749/// manglings.
4750///
4751/// I is the zero-based index of the parameter within its parameter
4752/// declaration clause. Note that the original ABI document describes
4753/// this using 1-based ordinals.
4754void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) {
4755 unsigned parmDepth = parm->getFunctionScopeDepth();
4756 unsigned parmIndex = parm->getFunctionScopeIndex();
4757
4758 // Compute 'L'.
4759 // parmDepth does not include the declaring function prototype.
4760 // FunctionTypeDepth does account for that.
4761 assert(parmDepth < FunctionTypeDepth.getDepth())((parmDepth < FunctionTypeDepth.getDepth()) ? static_cast<
void> (0) : __assert_fail ("parmDepth < FunctionTypeDepth.getDepth()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4761, __PRETTY_FUNCTION__))
;
4762 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth;
4763 if (FunctionTypeDepth.isInResultType())
4764 nestingDepth--;
4765
4766 if (nestingDepth == 0) {
4767 Out << "fp";
4768 } else {
4769 Out << "fL" << (nestingDepth - 1) << 'p';
4770 }
4771
4772 // Top-level qualifiers. We don't have to worry about arrays here,
4773 // because parameters declared as arrays should already have been
4774 // transformed to have pointer type. FIXME: apparently these don't
4775 // get mangled if used as an rvalue of a known non-class type?
4776 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4777, __PRETTY_FUNCTION__))
4777 && "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4777, __PRETTY_FUNCTION__))
;
4778
4779 if (const DependentAddressSpaceType *DAST =
4780 dyn_cast<DependentAddressSpaceType>(parm->getType())) {
4781 mangleQualifiers(DAST->getPointeeType().getQualifiers(), DAST);
4782 } else {
4783 mangleQualifiers(parm->getType().getQualifiers());
4784 }
4785
4786 // Parameter index.
4787 if (parmIndex != 0) {
4788 Out << (parmIndex - 1);
4789 }
4790 Out << '_';
4791}
4792
4793void CXXNameMangler::mangleCXXCtorType(CXXCtorType T,
4794 const CXXRecordDecl *InheritedFrom) {
4795 // <ctor-dtor-name> ::= C1 # complete object constructor
4796 // ::= C2 # base object constructor
4797 // ::= CI1 <type> # complete inheriting constructor
4798 // ::= CI2 <type> # base inheriting constructor
4799 //
4800 // In addition, C5 is a comdat name with C1 and C2 in it.
4801 Out << 'C';
4802 if (InheritedFrom)
4803 Out << 'I';
4804 switch (T) {
4805 case Ctor_Complete:
4806 Out << '1';
4807 break;
4808 case Ctor_Base:
4809 Out << '2';
4810 break;
4811 case Ctor_Comdat:
4812 Out << '5';
4813 break;
4814 case Ctor_DefaultClosure:
4815 case Ctor_CopyingClosure:
4816 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4816)
;
4817 }
4818 if (InheritedFrom)
4819 mangleName(InheritedFrom);
4820}
4821
4822void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
4823 // <ctor-dtor-name> ::= D0 # deleting destructor
4824 // ::= D1 # complete object destructor
4825 // ::= D2 # base object destructor
4826 //
4827 // In addition, D5 is a comdat name with D1, D2 and, if virtual, D0 in it.
4828 switch (T) {
4829 case Dtor_Deleting:
4830 Out << "D0";
4831 break;
4832 case Dtor_Complete:
4833 Out << "D1";
4834 break;
4835 case Dtor_Base:
4836 Out << "D2";
4837 break;
4838 case Dtor_Comdat:
4839 Out << "D5";
4840 break;
4841 }
4842}
4843
4844namespace {
4845// Helper to provide ancillary information on a template used to mangle its
4846// arguments.
4847struct TemplateArgManglingInfo {
4848 TemplateDecl *ResolvedTemplate = nullptr;
4849 bool SeenPackExpansionIntoNonPack = false;
4850 const NamedDecl *UnresolvedExpandedPack = nullptr;
4851
4852 TemplateArgManglingInfo(TemplateName TN) {
4853 if (TemplateDecl *TD = TN.getAsTemplateDecl())
4854 ResolvedTemplate = TD;
4855 }
4856
4857 /// Do we need to mangle template arguments with exactly correct types?
4858 ///
4859 /// This should be called exactly once for each parameter / argument pair, in
4860 /// order.
4861 bool needExactType(unsigned ParamIdx, const TemplateArgument &Arg) {
4862 // We need correct types when the template-name is unresolved or when it
4863 // names a template that is able to be overloaded.
4864 if (!ResolvedTemplate || SeenPackExpansionIntoNonPack)
4865 return true;
4866
4867 // Move to the next parameter.
4868 const NamedDecl *Param = UnresolvedExpandedPack;
4869 if (!Param) {
4870 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4871, __PRETTY_FUNCTION__))
4871 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4871, __PRETTY_FUNCTION__))
;
4872 Param = ResolvedTemplate->getTemplateParameters()->getParam(ParamIdx);
4873
4874 // If we reach an expanded parameter pack whose argument isn't in pack
4875 // form, that means Sema couldn't figure out which arguments belonged to
4876 // it, because it contains a pack expansion. Track the expanded pack for
4877 // all further template arguments until we hit that pack expansion.
4878 if (Param->isParameterPack() && Arg.getKind() != TemplateArgument::Pack) {
4879 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4880, __PRETTY_FUNCTION__))
4880 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4880, __PRETTY_FUNCTION__))
;
4881 UnresolvedExpandedPack = Param;
4882 }
4883 }
4884
4885 // If we encounter a pack argument that is expanded into a non-pack
4886 // parameter, we can no longer track parameter / argument correspondence,
4887 // and need to use exact types from this point onwards.
4888 if (Arg.isPackExpansion() &&
4889 (!Param->isParameterPack() || UnresolvedExpandedPack)) {
4890 SeenPackExpansionIntoNonPack = true;
4891 return true;
4892 }
4893
4894 // We need exact types for function template arguments because they might be
4895 // overloaded on template parameter type. As a special case, a member
4896 // function template of a generic lambda is not overloadable.
4897 if (auto *FTD = dyn_cast<FunctionTemplateDecl>(ResolvedTemplate)) {
4898 auto *RD = dyn_cast<CXXRecordDecl>(FTD->getDeclContext());
4899 if (!RD || !RD->isGenericLambda())
4900 return true;
4901 }
4902
4903 // Otherwise, we only need a correct type if the parameter has a deduced
4904 // type.
4905 //
4906 // Note: for an expanded parameter pack, getType() returns the type prior
4907 // to expansion. We could ask for the expanded type with getExpansionType(),
4908 // but it doesn't matter because substitution and expansion don't affect
4909 // whether a deduced type appears in the type.
4910 auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param);
4911 return NTTP && NTTP->getType()->getContainedDeducedType();
4912 }
4913};
4914}
4915
4916void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
4917 const TemplateArgumentLoc *TemplateArgs,
4918 unsigned NumTemplateArgs) {
4919 // <template-args> ::= I <template-arg>+ E
4920 Out << 'I';
4921 TemplateArgManglingInfo Info(TN);
4922 for (unsigned i = 0; i != NumTemplateArgs; ++i)
4923 mangleTemplateArg(TemplateArgs[i].getArgument(),
4924 Info.needExactType(i, TemplateArgs[i].getArgument()));
4925 Out << 'E';
4926}
4927
4928void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
4929 const TemplateArgumentList &AL) {
4930 // <template-args> ::= I <template-arg>+ E
4931 Out << 'I';
4932 TemplateArgManglingInfo Info(TN);
4933 for (unsigned i = 0, e = AL.size(); i != e; ++i)
4934 mangleTemplateArg(AL[i], Info.needExactType(i, AL[i]));
4935 Out << 'E';
4936}
4937
4938void CXXNameMangler::mangleTemplateArgs(TemplateName TN,
4939 const TemplateArgument *TemplateArgs,
4940 unsigned NumTemplateArgs) {
4941 // <template-args> ::= I <template-arg>+ E
4942 Out << 'I';
4943 TemplateArgManglingInfo Info(TN);
4944 for (unsigned i = 0; i != NumTemplateArgs; ++i)
4945 mangleTemplateArg(TemplateArgs[i], Info.needExactType(i, TemplateArgs[i]));
4946 Out << 'E';
4947}
4948
4949void CXXNameMangler::mangleTemplateArg(TemplateArgument A, bool NeedExactType) {
4950 // <template-arg> ::= <type> # type or template
4951 // ::= X <expression> E # expression
4952 // ::= <expr-primary> # simple expressions
4953 // ::= J <template-arg>* E # argument pack
4954 if (!A.isInstantiationDependent() || A.isDependent())
4955 A = Context.getASTContext().getCanonicalTemplateArgument(A);
4956
4957 switch (A.getKind()) {
4958 case TemplateArgument::Null:
4959 llvm_unreachable("Cannot mangle NULL template argument")::llvm::llvm_unreachable_internal("Cannot mangle NULL template argument"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 4959)
;
4960
4961 case TemplateArgument::Type:
4962 mangleType(A.getAsType());
4963 break;
4964 case TemplateArgument::Template:
4965 // This is mangled as <type>.
4966 mangleType(A.getAsTemplate());
4967 break;
4968 case TemplateArgument::TemplateExpansion:
4969 // <type> ::= Dp <type> # pack expansion (C++0x)
4970 Out << "Dp";
4971 mangleType(A.getAsTemplateOrTemplatePattern());
4972 break;
4973 case TemplateArgument::Expression: {
4974 // It's possible to end up with a DeclRefExpr here in certain
4975 // dependent cases, in which case we should mangle as a
4976 // declaration.
4977 const Expr *E = A.getAsExpr()->IgnoreParenImpCasts();
4978 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
4979 const ValueDecl *D = DRE->getDecl();
4980 if (isa<VarDecl>(D) || isa<FunctionDecl>(D)) {
4981 Out << 'L';
4982 mangle(D);
4983 Out << 'E';
4984 break;
4985 }
4986 }
4987
4988 Out << 'X';
4989 mangleExpression(E);
4990 Out << 'E';
4991 break;
4992 }
4993 case TemplateArgument::Integral:
4994 mangleIntegerLiteral(A.getIntegralType(), A.getAsIntegral());
4995 break;
4996 case TemplateArgument::Declaration: {
4997 // <expr-primary> ::= L <mangled-name> E # external name
4998 ValueDecl *D = A.getAsDecl();
4999
5000 // Template parameter objects are modeled by reproducing a source form
5001 // produced as if by aggregate initialization.
5002 if (A.getParamTypeForDecl()->isRecordType()) {
5003 auto *TPO = cast<TemplateParamObjectDecl>(D);
5004 mangleValueInTemplateArg(TPO->getType().getUnqualifiedType(),
5005 TPO->getValue(), /*TopLevel=*/true,
5006 NeedExactType);
5007 break;
5008 }
5009
5010 ASTContext &Ctx = Context.getASTContext();
5011 APValue Value;
5012 if (D->isCXXInstanceMember())
5013 // Simple pointer-to-member with no conversion.
5014 Value = APValue(D, /*IsDerivedMember=*/false, /*Path=*/{});
5015 else if (D->getType()->isArrayType() &&
5016 Ctx.hasSimilarType(Ctx.getDecayedType(D->getType()),
5017 A.getParamTypeForDecl()) &&
5018 Ctx.getLangOpts().getClangABICompat() >
5019 LangOptions::ClangABI::Ver11)
5020 // Build a value corresponding to this implicit array-to-pointer decay.
5021 Value = APValue(APValue::LValueBase(D), CharUnits::Zero(),
5022 {APValue::LValuePathEntry::ArrayIndex(0)},
5023 /*OnePastTheEnd=*/false);
5024 else
5025 // Regular pointer or reference to a declaration.
5026 Value = APValue(APValue::LValueBase(D), CharUnits::Zero(),
5027 ArrayRef<APValue::LValuePathEntry>(),
5028 /*OnePastTheEnd=*/false);
5029 mangleValueInTemplateArg(A.getParamTypeForDecl(), Value, /*TopLevel=*/true,
5030 NeedExactType);
5031 break;
5032 }
5033 case TemplateArgument::NullPtr: {
5034 mangleNullPointer(A.getNullPtrType());
5035 break;
5036 }
5037 case TemplateArgument::Pack: {
5038 // <template-arg> ::= J <template-arg>* E
5039 Out << 'J';
5040 for (const auto &P : A.pack_elements())
5041 mangleTemplateArg(P, NeedExactType);
5042 Out << 'E';
5043 }
5044 }
5045}
5046
5047/// Determine whether a given value is equivalent to zero-initialization for
5048/// the purpose of discarding a trailing portion of a 'tl' mangling.
5049///
5050/// Note that this is not in general equivalent to determining whether the
5051/// value has an all-zeroes bit pattern.
5052static bool isZeroInitialized(QualType T, const APValue &V) {
5053 // FIXME: mangleValueInTemplateArg has quadratic time complexity in
5054 // pathological cases due to using this, but it's a little awkward
5055 // to do this in linear time in general.
5056 switch (V.getKind()) {
5057 case APValue::None:
5058 case APValue::Indeterminate:
5059 case APValue::AddrLabelDiff:
5060 return false;
5061
5062 case APValue::Struct: {
5063 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5064 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5064, __PRETTY_FUNCTION__))
;
5065 unsigned I = 0;
5066 for (const CXXBaseSpecifier &BS : RD->bases()) {
5067 if (!isZeroInitialized(BS.getType(), V.getStructBase(I)))
5068 return false;
5069 ++I;
5070 }
5071 I = 0;
5072 for (const FieldDecl *FD : RD->fields()) {
5073 if (!FD->isUnnamedBitfield() &&
5074 !isZeroInitialized(FD->getType(), V.getStructField(I)))
5075 return false;
5076 ++I;
5077 }
5078 return true;
5079 }
5080
5081 case APValue::Union: {
5082 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5083 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5083, __PRETTY_FUNCTION__))
;
5084 // Zero-initialization zeroes the first non-unnamed-bitfield field, if any.
5085 for (const FieldDecl *FD : RD->fields()) {
5086 if (!FD->isUnnamedBitfield())
5087 return V.getUnionField() && declaresSameEntity(FD, V.getUnionField()) &&
5088 isZeroInitialized(FD->getType(), V.getUnionValue());
5089 }
5090 // If there are no fields (other than unnamed bitfields), the value is
5091 // necessarily zero-initialized.
5092 return true;
5093 }
5094
5095 case APValue::Array: {
5096 QualType ElemT(T->getArrayElementTypeNoTypeQual(), 0);
5097 for (unsigned I = 0, N = V.getArrayInitializedElts(); I != N; ++I)
5098 if (!isZeroInitialized(ElemT, V.getArrayInitializedElt(I)))
5099 return false;
5100 return !V.hasArrayFiller() || isZeroInitialized(ElemT, V.getArrayFiller());
5101 }
5102
5103 case APValue::Vector: {
5104 const VectorType *VT = T->castAs<VectorType>();
5105 for (unsigned I = 0, N = V.getVectorLength(); I != N; ++I)
5106 if (!isZeroInitialized(VT->getElementType(), V.getVectorElt(I)))
5107 return false;
5108 return true;
5109 }
5110
5111 case APValue::Int:
5112 return !V.getInt();
5113
5114 case APValue::Float:
5115 return V.getFloat().isPosZero();
5116
5117 case APValue::FixedPoint:
5118 return !V.getFixedPoint().getValue();
5119
5120 case APValue::ComplexFloat:
5121 return V.getComplexFloatReal().isPosZero() &&
5122 V.getComplexFloatImag().isPosZero();
5123
5124 case APValue::ComplexInt:
5125 return !V.getComplexIntReal() && !V.getComplexIntImag();
5126
5127 case APValue::LValue:
5128 return V.isNullPointer();
5129
5130 case APValue::MemberPointer:
5131 return !V.getMemberPointerDecl();
5132 }
5133
5134 llvm_unreachable("Unhandled APValue::ValueKind enum")::llvm::llvm_unreachable_internal("Unhandled APValue::ValueKind enum"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5134)
;
5135}
5136
5137static QualType getLValueType(ASTContext &Ctx, const APValue &LV) {
5138 QualType T = LV.getLValueBase().getType();
5139 for (APValue::LValuePathEntry E : LV.getLValuePath()) {
5140 if (const ArrayType *AT = Ctx.getAsArrayType(T))
5141 T = AT->getElementType();
5142 else if (const FieldDecl *FD =
5143 dyn_cast<FieldDecl>(E.getAsBaseOrMember().getPointer()))
5144 T = FD->getType();
5145 else
5146 T = Ctx.getRecordType(
5147 cast<CXXRecordDecl>(E.getAsBaseOrMember().getPointer()));
5148 }
5149 return T;
5150}
5151
5152void CXXNameMangler::mangleValueInTemplateArg(QualType T, const APValue &V,
5153 bool TopLevel,
5154 bool NeedExactType) {
5155 // Ignore all top-level cv-qualifiers, to match GCC.
5156 Qualifiers Quals;
5157 T = getASTContext().getUnqualifiedArrayType(T, Quals);
5158
5159 // A top-level expression that's not a primary expression is wrapped in X...E.
5160 bool IsPrimaryExpr = true;
5161 auto NotPrimaryExpr = [&] {
5162 if (TopLevel && IsPrimaryExpr)
5163 Out << 'X';
5164 IsPrimaryExpr = false;
5165 };
5166
5167 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/63.
5168 switch (V.getKind()) {
5169 case APValue::None:
5170 case APValue::Indeterminate:
5171 Out << 'L';
5172 mangleType(T);
5173 Out << 'E';
5174 break;
5175
5176 case APValue::AddrLabelDiff:
5177 llvm_unreachable("unexpected value kind in template argument")::llvm::llvm_unreachable_internal("unexpected value kind in template argument"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5177)
;
5178
5179 case APValue::Struct: {
5180 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
5181 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5181, __PRETTY_FUNCTION__))
;
5182
5183 // Drop trailing zero-initialized elements.
5184 llvm::SmallVector<const FieldDecl *, 16> Fields(RD->field_begin(),
5185 RD->field_end());
5186 while (
5187 !Fields.empty() &&
5188 (Fields.back()->isUnnamedBitfield() ||
5189 isZeroInitialized(Fields.back()->getType(),
5190 V.getStructField(Fields.back()->getFieldIndex())))) {
5191 Fields.pop_back();
5192 }
5193 llvm::ArrayRef<CXXBaseSpecifier> Bases(RD->bases_begin(), RD->bases_end());
5194 if (Fields.empty()) {
5195 while (!Bases.empty() &&
5196 isZeroInitialized(Bases.back().getType(),
5197 V.getStructBase(Bases.size() - 1)))
5198 Bases = Bases.drop_back();
5199 }
5200
5201 // <expression> ::= tl <type> <braced-expression>* E
5202 NotPrimaryExpr();
5203 Out << "tl";
5204 mangleType(T);
5205 for (unsigned I = 0, N = Bases.size(); I != N; ++I)
5206 mangleValueInTemplateArg(Bases[I].getType(), V.getStructBase(I), false);
5207 for (unsigned I = 0, N = Fields.size(); I != N; ++I) {
5208 if (Fields[I]->isUnnamedBitfield())
5209 continue;
5210 mangleValueInTemplateArg(Fields[I]->getType(),
5211 V.getStructField(Fields[I]->getFieldIndex()),
5212 false);
5213 }
5214 Out << 'E';
5215 break;
5216 }
5217
5218 case APValue::Union: {
5219 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5219, __PRETTY_FUNCTION__))
;
5220 const FieldDecl *FD = V.getUnionField();
5221
5222 if (!FD) {
5223 Out << 'L';
5224 mangleType(T);
5225 Out << 'E';
5226 break;
5227 }
5228
5229 // <braced-expression> ::= di <field source-name> <braced-expression>
5230 NotPrimaryExpr();
5231 Out << "tl";
5232 mangleType(T);
5233 if (!isZeroInitialized(T, V)) {
5234 Out << "di";
5235 mangleSourceName(FD->getIdentifier());
5236 mangleValueInTemplateArg(FD->getType(), V.getUnionValue(), false);
5237 }
5238 Out << 'E';
5239 break;
5240 }
5241
5242 case APValue::Array: {
5243 QualType ElemT(T->getArrayElementTypeNoTypeQual(), 0);
5244
5245 NotPrimaryExpr();
5246 Out << "tl";
5247 mangleType(T);
5248
5249 // Drop trailing zero-initialized elements.
5250 unsigned N = V.getArraySize();
5251 if (!V.hasArrayFiller() || isZeroInitialized(ElemT, V.getArrayFiller())) {
5252 N = V.getArrayInitializedElts();
5253 while (N && isZeroInitialized(ElemT, V.getArrayInitializedElt(N - 1)))
5254 --N;
5255 }
5256
5257 for (unsigned I = 0; I != N; ++I) {
5258 const APValue &Elem = I < V.getArrayInitializedElts()
5259 ? V.getArrayInitializedElt(I)
5260 : V.getArrayFiller();
5261 mangleValueInTemplateArg(ElemT, Elem, false);
5262 }
5263 Out << 'E';
5264 break;
5265 }
5266
5267 case APValue::Vector: {
5268 const VectorType *VT = T->castAs<VectorType>();
5269
5270 NotPrimaryExpr();
5271 Out << "tl";
5272 mangleType(T);
5273 unsigned N = V.getVectorLength();
5274 while (N && isZeroInitialized(VT->getElementType(), V.getVectorElt(N - 1)))
5275 --N;
5276 for (unsigned I = 0; I != N; ++I)
5277 mangleValueInTemplateArg(VT->getElementType(), V.getVectorElt(I), false);
5278 Out << 'E';
5279 break;
5280 }
5281
5282 case APValue::Int:
5283 mangleIntegerLiteral(T, V.getInt());
5284 break;
5285
5286 case APValue::Float:
5287 mangleFloatLiteral(T, V.getFloat());
5288 break;
5289
5290 case APValue::FixedPoint:
5291 mangleFixedPointLiteral();
5292 break;
5293
5294 case APValue::ComplexFloat: {
5295 const ComplexType *CT = T->castAs<ComplexType>();
5296 NotPrimaryExpr();
5297 Out << "tl";
5298 mangleType(T);
5299 if (!V.getComplexFloatReal().isPosZero() ||
5300 !V.getComplexFloatImag().isPosZero())
5301 mangleFloatLiteral(CT->getElementType(), V.getComplexFloatReal());
5302 if (!V.getComplexFloatImag().isPosZero())
5303 mangleFloatLiteral(CT->getElementType(), V.getComplexFloatImag());
5304 Out << 'E';
5305 break;
5306 }
5307
5308 case APValue::ComplexInt: {
5309 const ComplexType *CT = T->castAs<ComplexType>();
5310 NotPrimaryExpr();
5311 Out << "tl";
5312 mangleType(T);
5313 if (V.getComplexIntReal().getBoolValue() ||
5314 V.getComplexIntImag().getBoolValue())
5315 mangleIntegerLiteral(CT->getElementType(), V.getComplexIntReal());
5316 if (V.getComplexIntImag().getBoolValue())
5317 mangleIntegerLiteral(CT->getElementType(), V.getComplexIntImag());
5318 Out << 'E';
5319 break;
5320 }
5321
5322 case APValue::LValue: {
5323 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/47.
5324 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5325, __PRETTY_FUNCTION__))
5325 "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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5325, __PRETTY_FUNCTION__))
;
5326
5327 if (V.isNullPointer()) {
5328 mangleNullPointer(T);
5329 break;
5330 }
5331
5332 APValue::LValueBase B = V.getLValueBase();
5333 if (!B) {
5334 // Non-standard mangling for integer cast to a pointer; this can only
5335 // occur as an extension.
5336 CharUnits Offset = V.getLValueOffset();
5337 if (Offset.isZero()) {
5338 // This is reinterpret_cast<T*>(0), not a null pointer. Mangle this as
5339 // a cast, because L <type> 0 E means something else.
5340 NotPrimaryExpr();
5341 Out << "rc";
5342 mangleType(T);
5343 Out << "Li0E";
5344 if (TopLevel)
5345 Out << 'E';
5346 } else {
5347 Out << "L";
5348 mangleType(T);
5349 Out << Offset.getQuantity() << 'E';
5350 }
5351 break;
5352 }
5353
5354 ASTContext &Ctx = Context.getASTContext();
5355
5356 enum { Base, Offset, Path } Kind;
5357 if (!V.hasLValuePath()) {
5358 // Mangle as (T*)((char*)&base + N).
5359 if (T->isReferenceType()) {
5360 NotPrimaryExpr();
5361 Out << "decvP";
5362 mangleType(T->getPointeeType());
5363 } else {
5364 NotPrimaryExpr();
5365 Out << "cv";
5366 mangleType(T);
5367 }
5368 Out << "plcvPcad";
5369 Kind = Offset;
5370 } else {
5371 if (!V.getLValuePath().empty() || V.isLValueOnePastTheEnd()) {
5372 NotPrimaryExpr();
5373 // A final conversion to the template parameter's type is usually
5374 // folded into the 'so' mangling, but we can't do that for 'void*'
5375 // parameters without introducing collisions.
5376 if (NeedExactType && T->isVoidPointerType()) {
5377 Out << "cv";
5378 mangleType(T);
5379 }
5380 if (T->isPointerType())
5381 Out << "ad";
5382 Out << "so";
5383 mangleType(T->isVoidPointerType()
5384 ? getLValueType(Ctx, V).getUnqualifiedType()
5385 : T->getPointeeType());
5386 Kind = Path;
5387 } else {
5388 if (NeedExactType &&
5389 !Ctx.hasSameType(T->getPointeeType(), getLValueType(Ctx, V)) &&
5390 Ctx.getLangOpts().getClangABICompat() >
5391 LangOptions::ClangABI::Ver11) {
5392 NotPrimaryExpr();
5393 Out << "cv";
5394 mangleType(T);
5395 }
5396 if (T->isPointerType()) {
5397 NotPrimaryExpr();
5398 Out << "ad";
5399 }
5400 Kind = Base;
5401 }
5402 }
5403
5404 QualType TypeSoFar = B.getType();
5405 if (auto *VD = B.dyn_cast<const ValueDecl*>()) {
5406 Out << 'L';
5407 mangle(VD);
5408 Out << 'E';
5409 } else if (auto *E = B.dyn_cast<const Expr*>()) {
5410 NotPrimaryExpr();
5411 mangleExpression(E);
5412 } else if (auto TI = B.dyn_cast<TypeInfoLValue>()) {
5413 NotPrimaryExpr();
5414 Out << "ti";
5415 mangleType(QualType(TI.getType(), 0));
5416 } else {
5417 // We should never see dynamic allocations here.
5418 llvm_unreachable("unexpected lvalue base kind in template argument")::llvm::llvm_unreachable_internal("unexpected lvalue base kind in template argument"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5418)
;
5419 }
5420
5421 switch (Kind) {
5422 case Base:
5423 break;
5424
5425 case Offset:
5426 Out << 'L';
5427 mangleType(Ctx.getPointerDiffType());
5428 mangleNumber(V.getLValueOffset().getQuantity());
5429 Out << 'E';
5430 break;
5431
5432 case Path:
5433 // <expression> ::= so <referent type> <expr> [<offset number>]
5434 // <union-selector>* [p] E
5435 if (!V.getLValueOffset().isZero())
5436 mangleNumber(V.getLValueOffset().getQuantity());
5437
5438 // We model a past-the-end array pointer as array indexing with index N,
5439 // not with the "past the end" flag. Compensate for that.
5440 bool OnePastTheEnd = V.isLValueOnePastTheEnd();
5441
5442 for (APValue::LValuePathEntry E : V.getLValuePath()) {
5443 if (auto *AT = TypeSoFar->getAsArrayTypeUnsafe()) {
5444 if (auto *CAT = dyn_cast<ConstantArrayType>(AT))
5445 OnePastTheEnd |= CAT->getSize() == E.getAsArrayIndex();
5446 TypeSoFar = AT->getElementType();
5447 } else {
5448 const Decl *D = E.getAsBaseOrMember().getPointer();
5449 if (auto *FD = dyn_cast<FieldDecl>(D)) {
5450 // <union-selector> ::= _ <number>
5451 if (FD->getParent()->isUnion()) {
5452 Out << '_';
5453 if (FD->getFieldIndex())
5454 Out << (FD->getFieldIndex() - 1);
5455 }
5456 TypeSoFar = FD->getType();
5457 } else {
5458 TypeSoFar = Ctx.getRecordType(cast<CXXRecordDecl>(D));
5459 }
5460 }
5461 }
5462
5463 if (OnePastTheEnd)
5464 Out << 'p';
5465 Out << 'E';
5466 break;
5467 }
5468
5469 break;
5470 }
5471
5472 case APValue::MemberPointer:
5473 // Proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/47.
5474 if (!V.getMemberPointerDecl()) {
5475 mangleNullPointer(T);
5476 break;
5477 }
5478
5479 ASTContext &Ctx = Context.getASTContext();
5480
5481 NotPrimaryExpr();
5482 if (!V.getMemberPointerPath().empty()) {
5483 Out << "mc";
5484 mangleType(T);
5485 } else if (NeedExactType &&
5486 !Ctx.hasSameType(
5487 T->castAs<MemberPointerType>()->getPointeeType(),
5488 V.getMemberPointerDecl()->getType()) &&
5489 Ctx.getLangOpts().getClangABICompat() >
5490 LangOptions::ClangABI::Ver11) {
5491 Out << "cv";
5492 mangleType(T);
5493 }
5494 Out << "adL";
5495 mangle(V.getMemberPointerDecl());
5496 Out << 'E';
5497 if (!V.getMemberPointerPath().empty()) {
5498 CharUnits Offset =
5499 Context.getASTContext().getMemberPointerPathAdjustment(V);
5500 if (!Offset.isZero())
5501 mangleNumber(Offset.getQuantity());
5502 Out << 'E';
5503 }
5504 break;
5505 }
5506
5507 if (TopLevel && !IsPrimaryExpr)
5508 Out << 'E';
5509}
5510
5511void CXXNameMangler::mangleTemplateParameter(unsigned Depth, unsigned Index) {
5512 // <template-param> ::= T_ # first template parameter
5513 // ::= T <parameter-2 non-negative number> _
5514 // ::= TL <L-1 non-negative number> __
5515 // ::= TL <L-1 non-negative number> _
5516 // <parameter-2 non-negative number> _
5517 //
5518 // The latter two manglings are from a proposal here:
5519 // https://github.com/itanium-cxx-abi/cxx-abi/issues/31#issuecomment-528122117
5520 Out << 'T';
5521 if (Depth != 0)
5522 Out << 'L' << (Depth - 1) << '_';
5523 if (Index != 0)
5524 Out << (Index - 1);
5525 Out << '_';
5526}
5527
5528void CXXNameMangler::mangleSeqID(unsigned SeqID) {
5529 if (SeqID == 1)
5530 Out << '0';
5531 else if (SeqID > 1) {
5532 SeqID--;
5533
5534 // <seq-id> is encoded in base-36, using digits and upper case letters.
5535 char Buffer[7]; // log(2**32) / log(36) ~= 7
5536 MutableArrayRef<char> BufferRef(Buffer);
5537 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
5538
5539 for (; SeqID != 0; SeqID /= 36) {
5540 unsigned C = SeqID % 36;
5541 *I++ = (C < 10 ? '0' + C : 'A' + C - 10);
5542 }
5543
5544 Out.write(I.base(), I - BufferRef.rbegin());
5545 }
5546 Out << '_';
5547}
5548
5549void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) {
5550 bool result = mangleSubstitution(tname);
5551 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-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5551, __PRETTY_FUNCTION__))
;
5552 (void) result;
5553}
5554
5555// <substitution> ::= S <seq-id> _
5556// ::= S_
5557bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) {
5558 // Try one of the standard substitutions first.
5559 if (mangleStandardSubstitution(ND))
5560 return true;
5561
5562 ND = cast<NamedDecl>(ND->getCanonicalDecl());
5563 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND));
5564}
5565
5566/// Determine whether the given type has any qualifiers that are relevant for
5567/// substitutions.
5568static bool hasMangledSubstitutionQualifiers(QualType T) {
5569 Qualifiers Qs = T.getQualifiers();
5570 return Qs.getCVRQualifiers() || Qs.hasAddressSpace() || Qs.hasUnaligned();
5571}
5572
5573bool CXXNameMangler::mangleSubstitution(QualType T) {
5574 if (!hasMangledSubstitutionQualifiers(T)) {
5575 if (const RecordType *RT = T->getAs<RecordType>())
5576 return mangleSubstitution(RT->getDecl());
5577 }
5578
5579 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
5580
5581 return mangleSubstitution(TypePtr);
5582}
5583
5584bool CXXNameMangler::mangleSubstitution(TemplateName Template) {
5585 if (TemplateDecl *TD = Template.getAsTemplateDecl())
5586 return mangleSubstitution(TD);
5587
5588 Template = Context.getASTContext().getCanonicalTemplateName(Template);
5589 return mangleSubstitution(
5590 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer()));
5591}
5592
5593bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) {
5594 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr);
5595 if (I == Substitutions.end())
5596 return false;
5597
5598 unsigned SeqID = I->second;
5599 Out << 'S';
5600 mangleSeqID(SeqID);
5601
5602 return true;
5603}
5604
5605static bool isCharType(QualType T) {
5606 if (T.isNull())
5607 return false;
5608
5609 return T->isSpecificBuiltinType(BuiltinType::Char_S) ||
5610 T->isSpecificBuiltinType(BuiltinType::Char_U);
5611}
5612
5613/// Returns whether a given type is a template specialization of a given name
5614/// with a single argument of type char.
5615static bool isCharSpecialization(QualType T, const char *Name) {
5616 if (T.isNull())
5617 return false;
5618
5619 const RecordType *RT = T->getAs<RecordType>();
5620 if (!RT)
5621 return false;
5622
5623 const ClassTemplateSpecializationDecl *SD =
5624 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl());
5625 if (!SD)
5626 return false;
5627
5628 if (!isStdNamespace(getEffectiveDeclContext(SD)))
5629 return false;
5630
5631 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5632 if (TemplateArgs.size() != 1)
5633 return false;
5634
5635 if (!isCharType(TemplateArgs[0].getAsType()))
5636 return false;
5637
5638 return SD->getIdentifier()->getName() == Name;
5639}
5640
5641template <std::size_t StrLen>
5642static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD,
5643 const char (&Str)[StrLen]) {
5644 if (!SD->getIdentifier()->isStr(Str))
5645 return false;
5646
5647 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5648 if (TemplateArgs.size() != 2)
5649 return false;
5650
5651 if (!isCharType(TemplateArgs[0].getAsType()))
5652 return false;
5653
5654 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
5655 return false;
5656
5657 return true;
5658}
5659
5660bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) {
5661 // <substitution> ::= St # ::std::
5662 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
5663 if (isStd(NS)) {
5664 Out << "St";
5665 return true;
5666 }
5667 }
5668
5669 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) {
5670 if (!isStdNamespace(getEffectiveDeclContext(TD)))
5671 return false;
5672
5673 // <substitution> ::= Sa # ::std::allocator
5674 if (TD->getIdentifier()->isStr("allocator")) {
5675 Out << "Sa";
5676 return true;
5677 }
5678
5679 // <<substitution> ::= Sb # ::std::basic_string
5680 if (TD->getIdentifier()->isStr("basic_string")) {
5681 Out << "Sb";
5682 return true;
5683 }
5684 }
5685
5686 if (const ClassTemplateSpecializationDecl *SD =
5687 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
5688 if (!isStdNamespace(getEffectiveDeclContext(SD)))
5689 return false;
5690
5691 // <substitution> ::= Ss # ::std::basic_string<char,
5692 // ::std::char_traits<char>,
5693 // ::std::allocator<char> >
5694 if (SD->getIdentifier()->isStr("basic_string")) {
5695 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs();
5696
5697 if (TemplateArgs.size() != 3)
5698 return false;
5699
5700 if (!isCharType(TemplateArgs[0].getAsType()))
5701 return false;
5702
5703 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
5704 return false;
5705
5706 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator"))
5707 return false;
5708
5709 Out << "Ss";
5710 return true;
5711 }
5712
5713 // <substitution> ::= Si # ::std::basic_istream<char,
5714 // ::std::char_traits<char> >
5715 if (isStreamCharSpecialization(SD, "basic_istream")) {
5716 Out << "Si";
5717 return true;
5718 }
5719
5720 // <substitution> ::= So # ::std::basic_ostream<char,
5721 // ::std::char_traits<char> >
5722 if (isStreamCharSpecialization(SD, "basic_ostream")) {
5723 Out << "So";
5724 return true;
5725 }
5726
5727 // <substitution> ::= Sd # ::std::basic_iostream<char,
5728 // ::std::char_traits<char> >
5729 if (isStreamCharSpecialization(SD, "basic_iostream")) {
5730 Out << "Sd";
5731 return true;
5732 }
5733 }
5734 return false;
5735}
5736
5737void CXXNameMangler::addSubstitution(QualType T) {
5738 if (!hasMangledSubstitutionQualifiers(T)) {
5739 if (const RecordType *RT = T->getAs<RecordType>()) {
5740 addSubstitution(RT->getDecl());
5741 return;
5742 }
5743 }
5744
5745 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
5746 addSubstitution(TypePtr);
5747}
5748
5749void CXXNameMangler::addSubstitution(TemplateName Template) {
5750 if (TemplateDecl *TD = Template.getAsTemplateDecl())
5751 return addSubstitution(TD);
5752
5753 Template = Context.getASTContext().getCanonicalTemplateName(Template);
5754 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer()));
5755}
5756
5757void CXXNameMangler::addSubstitution(uintptr_t Ptr) {
5758 assert(!Substitutions.count(Ptr) && "Substitution already exists!")((!Substitutions.count(Ptr) && "Substitution already exists!"
) ? static_cast<void> (0) : __assert_fail ("!Substitutions.count(Ptr) && \"Substitution already exists!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5758, __PRETTY_FUNCTION__))
;
5759 Substitutions[Ptr] = SeqID++;
5760}
5761
5762void CXXNameMangler::extendSubstitutions(CXXNameMangler* Other) {
5763 assert(Other->SeqID >= SeqID && "Must be superset of substitutions!")((Other->SeqID >= SeqID && "Must be superset of substitutions!"
) ? static_cast<void> (0) : __assert_fail ("Other->SeqID >= SeqID && \"Must be superset of substitutions!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5763, __PRETTY_FUNCTION__))
;
5764 if (Other->SeqID > SeqID) {
5765 Substitutions.swap(Other->Substitutions);
5766 SeqID = Other->SeqID;
5767 }
5768}
5769
5770CXXNameMangler::AbiTagList
5771CXXNameMangler::makeFunctionReturnTypeTags(const FunctionDecl *FD) {
5772 // When derived abi tags are disabled there is no need to make any list.
5773 if (DisableDerivedAbiTags)
5774 return AbiTagList();
5775
5776 llvm::raw_null_ostream NullOutStream;
5777 CXXNameMangler TrackReturnTypeTags(*this, NullOutStream);
5778 TrackReturnTypeTags.disableDerivedAbiTags();
5779
5780 const FunctionProtoType *Proto =
5781 cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>());
5782 FunctionTypeDepthState saved = TrackReturnTypeTags.FunctionTypeDepth.push();
5783 TrackReturnTypeTags.FunctionTypeDepth.enterResultType();
5784 TrackReturnTypeTags.mangleType(Proto->getReturnType());
5785 TrackReturnTypeTags.FunctionTypeDepth.leaveResultType();
5786 TrackReturnTypeTags.FunctionTypeDepth.pop(saved);
5787
5788 return TrackReturnTypeTags.AbiTagsRoot.getSortedUniqueUsedAbiTags();
5789}
5790
5791CXXNameMangler::AbiTagList
5792CXXNameMangler::makeVariableTypeTags(const VarDecl *VD) {
5793 // When derived abi tags are disabled there is no need to make any list.
5794 if (DisableDerivedAbiTags)
5795 return AbiTagList();
5796
5797 llvm::raw_null_ostream NullOutStream;
5798 CXXNameMangler TrackVariableType(*this, NullOutStream);
5799 TrackVariableType.disableDerivedAbiTags();
5800
5801 TrackVariableType.mangleType(VD->getType());
5802
5803 return TrackVariableType.AbiTagsRoot.getSortedUniqueUsedAbiTags();
5804}
5805
5806bool CXXNameMangler::shouldHaveAbiTags(ItaniumMangleContextImpl &C,
5807 const VarDecl *VD) {
5808 llvm::raw_null_ostream NullOutStream;
5809 CXXNameMangler TrackAbiTags(C, NullOutStream, nullptr, true);
5810 TrackAbiTags.mangle(VD);
5811 return TrackAbiTags.AbiTagsRoot.getUsedAbiTags().size();
5812}
5813
5814//
5815
5816/// Mangles the name of the declaration D and emits that name to the given
5817/// output stream.
5818///
5819/// If the declaration D requires a mangled name, this routine will emit that
5820/// mangled name to \p os and return true. Otherwise, \p os will be unchanged
5821/// and this routine will return false. In this case, the caller should just
5822/// emit the identifier of the declaration (\c D->getIdentifier()) as its
5823/// name.
5824void ItaniumMangleContextImpl::mangleCXXName(GlobalDecl GD,
5825 raw_ostream &Out) {
5826 const NamedDecl *D = cast<NamedDecl>(GD.getDecl());
5827 assert((isa<FunctionDecl, VarDecl, TemplateParamObjectDecl>(D)) &&(((isa<FunctionDecl, VarDecl, TemplateParamObjectDecl>(
D)) && "Invalid mangleName() call, argument is not a variable or function!"
) ? static_cast<void> (0) : __assert_fail ("(isa<FunctionDecl, VarDecl, TemplateParamObjectDecl>(D)) && \"Invalid mangleName() call, argument is not a variable or function!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5828, __PRETTY_FUNCTION__))
5828 "Invalid mangleName() call, argument is not a variable or function!")(((isa<FunctionDecl, VarDecl, TemplateParamObjectDecl>(
D)) && "Invalid mangleName() call, argument is not a variable or function!"
) ? static_cast<void> (0) : __assert_fail ("(isa<FunctionDecl, VarDecl, TemplateParamObjectDecl>(D)) && \"Invalid mangleName() call, argument is not a variable or function!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5828, __PRETTY_FUNCTION__))
;
5829
5830 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
5831 getASTContext().getSourceManager(),
5832 "Mangling declaration");
5833
5834 if (auto *CD = dyn_cast<CXXConstructorDecl>(D)) {
5835 auto Type = GD.getCtorType();
5836 CXXNameMangler Mangler(*this, Out, CD, Type);
5837 return Mangler.mangle(GlobalDecl(CD, Type));
5838 }
5839
5840 if (auto *DD = dyn_cast<CXXDestructorDecl>(D)) {
5841 auto Type = GD.getDtorType();
5842 CXXNameMangler Mangler(*this, Out, DD, Type);
5843 return Mangler.mangle(GlobalDecl(DD, Type));
5844 }
5845
5846 CXXNameMangler Mangler(*this, Out, D);
5847 Mangler.mangle(GD);
5848}
5849
5850void ItaniumMangleContextImpl::mangleCXXCtorComdat(const CXXConstructorDecl *D,
5851 raw_ostream &Out) {
5852 CXXNameMangler Mangler(*this, Out, D, Ctor_Comdat);
5853 Mangler.mangle(GlobalDecl(D, Ctor_Comdat));
5854}
5855
5856void ItaniumMangleContextImpl::mangleCXXDtorComdat(const CXXDestructorDecl *D,
5857 raw_ostream &Out) {
5858 CXXNameMangler Mangler(*this, Out, D, Dtor_Comdat);
5859 Mangler.mangle(GlobalDecl(D, Dtor_Comdat));
5860}
5861
5862void ItaniumMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
5863 const ThunkInfo &Thunk,
5864 raw_ostream &Out) {
5865 // <special-name> ::= T <call-offset> <base encoding>
5866 // # base is the nominal target function of thunk
5867 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding>
5868 // # base is the nominal target function of thunk
5869 // # first call-offset is 'this' adjustment
5870 // # second call-offset is result adjustment
5871
5872 assert(!isa<CXXDestructorDecl>(MD) &&((!isa<CXXDestructorDecl>(MD) && "Use mangleCXXDtor for destructor decls!"
) ? static_cast<void> (0) : __assert_fail ("!isa<CXXDestructorDecl>(MD) && \"Use mangleCXXDtor for destructor decls!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5873, __PRETTY_FUNCTION__))
5873 "Use mangleCXXDtor for destructor decls!")((!isa<CXXDestructorDecl>(MD) && "Use mangleCXXDtor for destructor decls!"
) ? static_cast<void> (0) : __assert_fail ("!isa<CXXDestructorDecl>(MD) && \"Use mangleCXXDtor for destructor decls!\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/AST/ItaniumMangle.cpp"
, 5873, __PRETTY_FUNCTION__))
;
5874 CXXNameMangler Mangler(*this, Out);
5875 Mangler.getStream() << "_ZT";
5876 if (!Thunk.Return.isEmpty())
5877 Mangler.getStream() << 'c';
5878
5879 // Mangle the 'this' pointer adjustment.
5880 Mangler.mangleCallOffset(Thunk.This.NonVirtual,
5881 Thunk.This.Virtual.Itanium.VCallOffsetOffset);
5882
5883 // Mangle the return pointer adjustment if there is one.
5884 if (!Thunk.Return.isEmpty())
5885 Mangler.mangleCallOffset(Thunk.Return.NonVirtual,
5886 Thunk.Return.Virtual.Itanium.VBaseOffsetOffset);
5887
5888 Mangler.mangleFunctionEncoding(MD);
5889}
5890
5891void ItaniumMangleContextImpl::mangleCXXDtorThunk(
5892 const CXXDestructorDecl *DD, CXXDtorType Type,
5893 const ThisAdjustment &ThisAdjustment, raw_ostream &Out) {
5894 // <special-name> ::= T <call-offset> <base encoding>
5895 // # base is the nominal target function of thunk
5896 CXXNameMangler Mangler(*this, Out, DD, Type);
5897 Mangler.getStream() << "_ZT";
5898
5899 // Mangle the 'this' pointer adjustment.
5900 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual,
5901 ThisAdjustment.Virtual.Itanium.VCallOffsetOffset);
5902
5903 Mangler.mangleFunctionEncoding(GlobalDecl(DD, Type));
5904}
5905
5906/// Returns the mangled name for a guard variable for the passed in VarDecl.
5907void ItaniumMangleContextImpl::mangleStaticGuardVariable(const VarDecl *D,
5908 raw_ostream &Out) {
5909 // <special-name> ::= GV <object name> # Guard variable for one-time
5910 // # initialization
5911 CXXNameMangler Mangler(*this, Out);
5912 // GCC 5.3.0 doesn't emit derived ABI tags for local names but that seems to
5913 // be a bug that is fixed in trunk.
5914 Mangler.getStream() << "_ZGV";
5915 Mangler.mangleName(D);
5916}
5917
5918void ItaniumMangleContextImpl::mangleDynamicInitializer(const VarDecl *MD,
5919 raw_ostream &Out) {
5920 // These symbols are internal in the Itanium ABI, so the names don't matter.
5921 // Clang has traditionally used this symbol and allowed LLVM to adjust it to
5922 // avoid duplicate symbols.
5923 Out << "__cxx_global_var_init";
5924}
5925
5926void ItaniumMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
5927 raw_ostream &Out) {
5928 // Prefix the mangling of D with __dtor_.
5929 CXXNameMangler Mangler(*this, Out);
5930 Mangler.getStream() << "__dtor_";
5931 if (shouldMangleDeclName(D))
5932 Mangler.mangle(D);
5933 else
5934 Mangler.getStream() << D->getName();
5935}
5936
5937void ItaniumMangleContextImpl::mangleDynamicStermFinalizer(const VarDecl *D,
5938 raw_ostream &Out) {
5939 // Clang generates these internal-linkage functions as part of its
5940 // implementation of the XL ABI.
5941 CXXNameMangler Mangler(*this, Out);
5942 Mangler.getStream() << "__finalize_";
5943 if (shouldMangleDeclName(D))