ItaniumMangle.cpp revision 63c00d7f35fa060c0a446c9df3a4402d9c7757fe
1//===--- ItaniumMangle.cpp - Itanium C++ Name Mangling ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// Implements C++ name mangling according to the Itanium C++ ABI, 11// which is used in GCC 3.2 and newer (and many compilers that are 12// ABI-compatible with GCC): 13// 14// http://www.codesourcery.com/public/cxx-abi/abi.html 15// 16//===----------------------------------------------------------------------===// 17#include "clang/AST/Mangle.h" 18#include "clang/AST/ASTContext.h" 19#include "clang/AST/Decl.h" 20#include "clang/AST/DeclCXX.h" 21#include "clang/AST/DeclObjC.h" 22#include "clang/AST/DeclTemplate.h" 23#include "clang/AST/ExprCXX.h" 24#include "clang/Basic/ABI.h" 25#include "clang/Basic/SourceManager.h" 26#include "llvm/ADT/StringExtras.h" 27#include "llvm/Support/raw_ostream.h" 28#include "llvm/Support/ErrorHandling.h" 29 30#define MANGLE_CHECKER 0 31 32#if MANGLE_CHECKER 33#include <cxxabi.h> 34#endif 35 36using namespace clang; 37 38namespace { 39 40static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) { 41 const DeclContext *DC = dyn_cast<DeclContext>(ND); 42 if (!DC) 43 DC = ND->getDeclContext(); 44 while (!DC->isNamespace() && !DC->isTranslationUnit()) { 45 if (isa<FunctionDecl>(DC->getParent())) 46 return dyn_cast<CXXRecordDecl>(DC); 47 DC = DC->getParent(); 48 } 49 return 0; 50} 51 52static const CXXMethodDecl *getStructor(const CXXMethodDecl *MD) { 53 assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) && 54 "Passed in decl is not a ctor or dtor!"); 55 56 if (const TemplateDecl *TD = MD->getPrimaryTemplate()) { 57 MD = cast<CXXMethodDecl>(TD->getTemplatedDecl()); 58 59 assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) && 60 "Templated decl is not a ctor or dtor!"); 61 } 62 63 return MD; 64} 65 66static const unsigned UnknownArity = ~0U; 67 68class ItaniumMangleContext : public MangleContext { 69 llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds; 70 unsigned Discriminator; 71 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier; 72 73public: 74 explicit ItaniumMangleContext(ASTContext &Context, 75 Diagnostic &Diags) 76 : MangleContext(Context, Diags) { } 77 78 uint64_t getAnonymousStructId(const TagDecl *TD) { 79 std::pair<llvm::DenseMap<const TagDecl *, 80 uint64_t>::iterator, bool> Result = 81 AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size())); 82 return Result.first->second; 83 } 84 85 void startNewFunction() { 86 MangleContext::startNewFunction(); 87 mangleInitDiscriminator(); 88 } 89 90 /// @name Mangler Entry Points 91 /// @{ 92 93 bool shouldMangleDeclName(const NamedDecl *D); 94 void mangleName(const NamedDecl *D, llvm::SmallVectorImpl<char> &); 95 void mangleThunk(const CXXMethodDecl *MD, 96 const ThunkInfo &Thunk, 97 llvm::SmallVectorImpl<char> &); 98 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, 99 const ThisAdjustment &ThisAdjustment, 100 llvm::SmallVectorImpl<char> &); 101 void mangleReferenceTemporary(const VarDecl *D, 102 llvm::SmallVectorImpl<char> &); 103 void mangleCXXVTable(const CXXRecordDecl *RD, 104 llvm::SmallVectorImpl<char> &); 105 void mangleCXXVTT(const CXXRecordDecl *RD, 106 llvm::SmallVectorImpl<char> &); 107 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset, 108 const CXXRecordDecl *Type, 109 llvm::SmallVectorImpl<char> &); 110 void mangleCXXRTTI(QualType T, llvm::SmallVectorImpl<char> &); 111 void mangleCXXRTTIName(QualType T, llvm::SmallVectorImpl<char> &); 112 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type, 113 llvm::SmallVectorImpl<char> &); 114 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type, 115 llvm::SmallVectorImpl<char> &); 116 117 void mangleItaniumGuardVariable(const VarDecl *D, 118 llvm::SmallVectorImpl<char> &); 119 120 void mangleInitDiscriminator() { 121 Discriminator = 0; 122 } 123 124 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) { 125 unsigned &discriminator = Uniquifier[ND]; 126 if (!discriminator) 127 discriminator = ++Discriminator; 128 if (discriminator == 1) 129 return false; 130 disc = discriminator-2; 131 return true; 132 } 133 /// @} 134}; 135 136/// CXXNameMangler - Manage the mangling of a single name. 137class CXXNameMangler { 138 ItaniumMangleContext &Context; 139 llvm::raw_svector_ostream Out; 140 141 const CXXMethodDecl *Structor; 142 unsigned StructorType; 143 144 /// SeqID - The next subsitution sequence number. 145 unsigned SeqID; 146 147 llvm::DenseMap<uintptr_t, unsigned> Substitutions; 148 149 ASTContext &getASTContext() const { return Context.getASTContext(); } 150 151public: 152 CXXNameMangler(ItaniumMangleContext &C, llvm::SmallVectorImpl<char> &Res) 153 : Context(C), Out(Res), Structor(0), StructorType(0), SeqID(0) { } 154 CXXNameMangler(ItaniumMangleContext &C, llvm::SmallVectorImpl<char> &Res, 155 const CXXConstructorDecl *D, CXXCtorType Type) 156 : Context(C), Out(Res), Structor(getStructor(D)), StructorType(Type), 157 SeqID(0) { } 158 CXXNameMangler(ItaniumMangleContext &C, llvm::SmallVectorImpl<char> &Res, 159 const CXXDestructorDecl *D, CXXDtorType Type) 160 : Context(C), Out(Res), Structor(getStructor(D)), StructorType(Type), 161 SeqID(0) { } 162 163#if MANGLE_CHECKER 164 ~CXXNameMangler() { 165 if (Out.str()[0] == '\01') 166 return; 167 168 int status = 0; 169 char *result = abi::__cxa_demangle(Out.str().str().c_str(), 0, 0, &status); 170 assert(status == 0 && "Could not demangle mangled name!"); 171 free(result); 172 } 173#endif 174 llvm::raw_svector_ostream &getStream() { return Out; } 175 176 void mangle(const NamedDecl *D, llvm::StringRef Prefix = "_Z"); 177 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual); 178 void mangleNumber(const llvm::APSInt &I); 179 void mangleNumber(int64_t Number); 180 void mangleFloat(const llvm::APFloat &F); 181 void mangleFunctionEncoding(const FunctionDecl *FD); 182 void mangleName(const NamedDecl *ND); 183 void mangleType(QualType T); 184 void mangleNameOrStandardSubstitution(const NamedDecl *ND); 185 186private: 187 bool mangleSubstitution(const NamedDecl *ND); 188 bool mangleSubstitution(QualType T); 189 bool mangleSubstitution(TemplateName Template); 190 bool mangleSubstitution(uintptr_t Ptr); 191 192 bool mangleStandardSubstitution(const NamedDecl *ND); 193 194 void addSubstitution(const NamedDecl *ND) { 195 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 196 197 addSubstitution(reinterpret_cast<uintptr_t>(ND)); 198 } 199 void addSubstitution(QualType T); 200 void addSubstitution(TemplateName Template); 201 void addSubstitution(uintptr_t Ptr); 202 203 void mangleUnresolvedScope(NestedNameSpecifier *Qualifier); 204 void mangleUnresolvedName(NestedNameSpecifier *Qualifier, 205 DeclarationName Name, 206 unsigned KnownArity = UnknownArity); 207 208 void mangleName(const TemplateDecl *TD, 209 const TemplateArgument *TemplateArgs, 210 unsigned NumTemplateArgs); 211 void mangleUnqualifiedName(const NamedDecl *ND) { 212 mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity); 213 } 214 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name, 215 unsigned KnownArity); 216 void mangleUnscopedName(const NamedDecl *ND); 217 void mangleUnscopedTemplateName(const TemplateDecl *ND); 218 void mangleUnscopedTemplateName(TemplateName); 219 void mangleSourceName(const IdentifierInfo *II); 220 void mangleLocalName(const NamedDecl *ND); 221 void mangleNestedName(const NamedDecl *ND, const DeclContext *DC, 222 bool NoFunction=false); 223 void mangleNestedName(const TemplateDecl *TD, 224 const TemplateArgument *TemplateArgs, 225 unsigned NumTemplateArgs); 226 void manglePrefix(const DeclContext *DC, bool NoFunction=false); 227 void mangleTemplatePrefix(const TemplateDecl *ND); 228 void mangleTemplatePrefix(TemplateName Template); 229 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity); 230 void mangleQualifiers(Qualifiers Quals); 231 void mangleRefQualifier(RefQualifierKind RefQualifier); 232 233 void mangleObjCMethodName(const ObjCMethodDecl *MD); 234 235 // Declare manglers for every type class. 236#define ABSTRACT_TYPE(CLASS, PARENT) 237#define NON_CANONICAL_TYPE(CLASS, PARENT) 238#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T); 239#include "clang/AST/TypeNodes.def" 240 241 void mangleType(const TagType*); 242 void mangleType(TemplateName); 243 void mangleBareFunctionType(const FunctionType *T, 244 bool MangleReturnType); 245 void mangleNeonVectorType(const VectorType *T); 246 247 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value); 248 void mangleMemberExpr(const Expr *Base, bool IsArrow, 249 NestedNameSpecifier *Qualifier, 250 DeclarationName Name, 251 unsigned KnownArity); 252 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity); 253 void mangleCXXCtorType(CXXCtorType T); 254 void mangleCXXDtorType(CXXDtorType T); 255 256 void mangleTemplateArgs(const ExplicitTemplateArgumentList &TemplateArgs); 257 void mangleTemplateArgs(TemplateName Template, 258 const TemplateArgument *TemplateArgs, 259 unsigned NumTemplateArgs); 260 void mangleTemplateArgs(const TemplateParameterList &PL, 261 const TemplateArgument *TemplateArgs, 262 unsigned NumTemplateArgs); 263 void mangleTemplateArgs(const TemplateParameterList &PL, 264 const TemplateArgumentList &AL); 265 void mangleTemplateArg(const NamedDecl *P, const TemplateArgument &A); 266 267 void mangleTemplateParameter(unsigned Index); 268}; 269 270} 271 272static bool isInCLinkageSpecification(const Decl *D) { 273 D = D->getCanonicalDecl(); 274 for (const DeclContext *DC = D->getDeclContext(); 275 !DC->isTranslationUnit(); DC = DC->getParent()) { 276 if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) 277 return Linkage->getLanguage() == LinkageSpecDecl::lang_c; 278 } 279 280 return false; 281} 282 283bool ItaniumMangleContext::shouldMangleDeclName(const NamedDecl *D) { 284 // In C, functions with no attributes never need to be mangled. Fastpath them. 285 if (!getASTContext().getLangOptions().CPlusPlus && !D->hasAttrs()) 286 return false; 287 288 // Any decl can be declared with __asm("foo") on it, and this takes precedence 289 // over all other naming in the .o file. 290 if (D->hasAttr<AsmLabelAttr>()) 291 return true; 292 293 // Clang's "overloadable" attribute extension to C/C++ implies name mangling 294 // (always) as does passing a C++ member function and a function 295 // whose name is not a simple identifier. 296 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D); 297 if (FD && (FD->hasAttr<OverloadableAttr>() || isa<CXXMethodDecl>(FD) || 298 !FD->getDeclName().isIdentifier())) 299 return true; 300 301 // Otherwise, no mangling is done outside C++ mode. 302 if (!getASTContext().getLangOptions().CPlusPlus) 303 return false; 304 305 // Variables at global scope with non-internal linkage are not mangled 306 if (!FD) { 307 const DeclContext *DC = D->getDeclContext(); 308 // Check for extern variable declared locally. 309 if (DC->isFunctionOrMethod() && D->hasLinkage()) 310 while (!DC->isNamespace() && !DC->isTranslationUnit()) 311 DC = DC->getParent(); 312 if (DC->isTranslationUnit() && D->getLinkage() != InternalLinkage) 313 return false; 314 } 315 316 // Class members are always mangled. 317 if (D->getDeclContext()->isRecord()) 318 return true; 319 320 // C functions and "main" are not mangled. 321 if ((FD && FD->isMain()) || isInCLinkageSpecification(D)) 322 return false; 323 324 return true; 325} 326 327void CXXNameMangler::mangle(const NamedDecl *D, llvm::StringRef Prefix) { 328 // Any decl can be declared with __asm("foo") on it, and this takes precedence 329 // over all other naming in the .o file. 330 if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) { 331 // If we have an asm name, then we use it as the mangling. 332 Out << '\01'; // LLVM IR Marker for __asm("foo") 333 Out << ALA->getLabel(); 334 return; 335 } 336 337 // <mangled-name> ::= _Z <encoding> 338 // ::= <data name> 339 // ::= <special-name> 340 Out << Prefix; 341 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) 342 mangleFunctionEncoding(FD); 343 else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 344 mangleName(VD); 345 else 346 mangleName(cast<FieldDecl>(D)); 347} 348 349void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) { 350 // <encoding> ::= <function name> <bare-function-type> 351 mangleName(FD); 352 353 // Don't mangle in the type if this isn't a decl we should typically mangle. 354 if (!Context.shouldMangleDeclName(FD)) 355 return; 356 357 // Whether the mangling of a function type includes the return type depends on 358 // the context and the nature of the function. The rules for deciding whether 359 // the return type is included are: 360 // 361 // 1. Template functions (names or types) have return types encoded, with 362 // the exceptions listed below. 363 // 2. Function types not appearing as part of a function name mangling, 364 // e.g. parameters, pointer types, etc., have return type encoded, with the 365 // exceptions listed below. 366 // 3. Non-template function names do not have return types encoded. 367 // 368 // The exceptions mentioned in (1) and (2) above, for which the return type is 369 // never included, are 370 // 1. Constructors. 371 // 2. Destructors. 372 // 3. Conversion operator functions, e.g. operator int. 373 bool MangleReturnType = false; 374 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) { 375 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) || 376 isa<CXXConversionDecl>(FD))) 377 MangleReturnType = true; 378 379 // Mangle the type of the primary template. 380 FD = PrimaryTemplate->getTemplatedDecl(); 381 } 382 383 // Do the canonicalization out here because parameter types can 384 // undergo additional canonicalization (e.g. array decay). 385 const FunctionType *FT 386 = cast<FunctionType>(Context.getASTContext() 387 .getCanonicalType(FD->getType())); 388 389 mangleBareFunctionType(FT, MangleReturnType); 390} 391 392static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) { 393 while (isa<LinkageSpecDecl>(DC)) { 394 DC = DC->getParent(); 395 } 396 397 return DC; 398} 399 400/// isStd - Return whether a given namespace is the 'std' namespace. 401static bool isStd(const NamespaceDecl *NS) { 402 if (!IgnoreLinkageSpecDecls(NS->getParent())->isTranslationUnit()) 403 return false; 404 405 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier(); 406 return II && II->isStr("std"); 407} 408 409// isStdNamespace - Return whether a given decl context is a toplevel 'std' 410// namespace. 411static bool isStdNamespace(const DeclContext *DC) { 412 if (!DC->isNamespace()) 413 return false; 414 415 return isStd(cast<NamespaceDecl>(DC)); 416} 417 418static const TemplateDecl * 419isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) { 420 // Check if we have a function template. 421 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)){ 422 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) { 423 TemplateArgs = FD->getTemplateSpecializationArgs(); 424 return TD; 425 } 426 } 427 428 // Check if we have a class template. 429 if (const ClassTemplateSpecializationDecl *Spec = 430 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 431 TemplateArgs = &Spec->getTemplateArgs(); 432 return Spec->getSpecializedTemplate(); 433 } 434 435 return 0; 436} 437 438void CXXNameMangler::mangleName(const NamedDecl *ND) { 439 // <name> ::= <nested-name> 440 // ::= <unscoped-name> 441 // ::= <unscoped-template-name> <template-args> 442 // ::= <local-name> 443 // 444 const DeclContext *DC = ND->getDeclContext(); 445 446 // If this is an extern variable declared locally, the relevant DeclContext 447 // is that of the containing namespace, or the translation unit. 448 if (isa<FunctionDecl>(DC) && ND->hasLinkage()) 449 while (!DC->isNamespace() && !DC->isTranslationUnit()) 450 DC = DC->getParent(); 451 else if (GetLocalClassDecl(ND)) { 452 mangleLocalName(ND); 453 return; 454 } 455 456 while (isa<LinkageSpecDecl>(DC)) 457 DC = DC->getParent(); 458 459 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 460 // Check if we have a template. 461 const TemplateArgumentList *TemplateArgs = 0; 462 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 463 mangleUnscopedTemplateName(TD); 464 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 465 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 466 return; 467 } 468 469 mangleUnscopedName(ND); 470 return; 471 } 472 473 if (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)) { 474 mangleLocalName(ND); 475 return; 476 } 477 478 mangleNestedName(ND, DC); 479} 480void CXXNameMangler::mangleName(const TemplateDecl *TD, 481 const TemplateArgument *TemplateArgs, 482 unsigned NumTemplateArgs) { 483 const DeclContext *DC = IgnoreLinkageSpecDecls(TD->getDeclContext()); 484 485 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 486 mangleUnscopedTemplateName(TD); 487 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 488 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 489 } else { 490 mangleNestedName(TD, TemplateArgs, NumTemplateArgs); 491 } 492} 493 494void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND) { 495 // <unscoped-name> ::= <unqualified-name> 496 // ::= St <unqualified-name> # ::std:: 497 if (isStdNamespace(ND->getDeclContext())) 498 Out << "St"; 499 500 mangleUnqualifiedName(ND); 501} 502 503void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) { 504 // <unscoped-template-name> ::= <unscoped-name> 505 // ::= <substitution> 506 if (mangleSubstitution(ND)) 507 return; 508 509 // <template-template-param> ::= <template-param> 510 if (const TemplateTemplateParmDecl *TTP 511 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 512 mangleTemplateParameter(TTP->getIndex()); 513 return; 514 } 515 516 mangleUnscopedName(ND->getTemplatedDecl()); 517 addSubstitution(ND); 518} 519 520void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) { 521 // <unscoped-template-name> ::= <unscoped-name> 522 // ::= <substitution> 523 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 524 return mangleUnscopedTemplateName(TD); 525 526 if (mangleSubstitution(Template)) 527 return; 528 529 // FIXME: How to cope with operators here? 530 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 531 assert(Dependent && "Not a dependent template name?"); 532 if (!Dependent->isIdentifier()) { 533 // FIXME: We can't possibly know the arity of the operator here! 534 Diagnostic &Diags = Context.getDiags(); 535 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 536 "cannot mangle dependent operator name"); 537 Diags.Report(DiagID); 538 return; 539 } 540 541 mangleSourceName(Dependent->getIdentifier()); 542 addSubstitution(Template); 543} 544 545void CXXNameMangler::mangleFloat(const llvm::APFloat &F) { 546 // TODO: avoid this copy with careful stream management. 547 llvm::SmallString<20> Buffer; 548 F.bitcastToAPInt().toString(Buffer, 16, false); 549 Out.write(Buffer.data(), Buffer.size()); 550} 551 552void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) { 553 if (Value.isSigned() && Value.isNegative()) { 554 Out << 'n'; 555 Value.abs().print(Out, true); 556 } else 557 Value.print(Out, Value.isSigned()); 558} 559 560void CXXNameMangler::mangleNumber(int64_t Number) { 561 // <number> ::= [n] <non-negative decimal integer> 562 if (Number < 0) { 563 Out << 'n'; 564 Number = -Number; 565 } 566 567 Out << Number; 568} 569 570void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) { 571 // <call-offset> ::= h <nv-offset> _ 572 // ::= v <v-offset> _ 573 // <nv-offset> ::= <offset number> # non-virtual base override 574 // <v-offset> ::= <offset number> _ <virtual offset number> 575 // # virtual base override, with vcall offset 576 if (!Virtual) { 577 Out << 'h'; 578 mangleNumber(NonVirtual); 579 Out << '_'; 580 return; 581 } 582 583 Out << 'v'; 584 mangleNumber(NonVirtual); 585 Out << '_'; 586 mangleNumber(Virtual); 587 Out << '_'; 588} 589 590void CXXNameMangler::mangleUnresolvedScope(NestedNameSpecifier *Qualifier) { 591 Qualifier = getASTContext().getCanonicalNestedNameSpecifier(Qualifier); 592 switch (Qualifier->getKind()) { 593 case NestedNameSpecifier::Global: 594 // nothing 595 break; 596 case NestedNameSpecifier::Namespace: 597 mangleName(Qualifier->getAsNamespace()); 598 break; 599 case NestedNameSpecifier::TypeSpec: 600 case NestedNameSpecifier::TypeSpecWithTemplate: { 601 const Type *QTy = Qualifier->getAsType(); 602 603 if (const TemplateSpecializationType *TST = 604 dyn_cast<TemplateSpecializationType>(QTy)) { 605 if (!mangleSubstitution(QualType(TST, 0))) { 606 mangleTemplatePrefix(TST->getTemplateName()); 607 608 // FIXME: GCC does not appear to mangle the template arguments when 609 // the template in question is a dependent template name. Should we 610 // emulate that badness? 611 mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(), 612 TST->getNumArgs()); 613 addSubstitution(QualType(TST, 0)); 614 } 615 } else { 616 // We use the QualType mangle type variant here because it handles 617 // substitutions. 618 mangleType(QualType(QTy, 0)); 619 } 620 } 621 break; 622 case NestedNameSpecifier::Identifier: 623 // Member expressions can have these without prefixes. 624 if (Qualifier->getPrefix()) 625 mangleUnresolvedScope(Qualifier->getPrefix()); 626 mangleSourceName(Qualifier->getAsIdentifier()); 627 break; 628 } 629} 630 631/// Mangles a name which was not resolved to a specific entity. 632void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *Qualifier, 633 DeclarationName Name, 634 unsigned KnownArity) { 635 if (Qualifier) 636 mangleUnresolvedScope(Qualifier); 637 // FIXME: ambiguity of unqualified lookup with :: 638 639 mangleUnqualifiedName(0, Name, KnownArity); 640} 641 642static const FieldDecl *FindFirstNamedDataMember(const RecordDecl *RD) { 643 assert(RD->isAnonymousStructOrUnion() && 644 "Expected anonymous struct or union!"); 645 646 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 647 I != E; ++I) { 648 const FieldDecl *FD = *I; 649 650 if (FD->getIdentifier()) 651 return FD; 652 653 if (const RecordType *RT = FD->getType()->getAs<RecordType>()) { 654 if (const FieldDecl *NamedDataMember = 655 FindFirstNamedDataMember(RT->getDecl())) 656 return NamedDataMember; 657 } 658 } 659 660 // We didn't find a named data member. 661 return 0; 662} 663 664void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND, 665 DeclarationName Name, 666 unsigned KnownArity) { 667 // <unqualified-name> ::= <operator-name> 668 // ::= <ctor-dtor-name> 669 // ::= <source-name> 670 switch (Name.getNameKind()) { 671 case DeclarationName::Identifier: { 672 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) { 673 // We must avoid conflicts between internally- and externally- 674 // linked variable declaration names in the same TU. 675 // This naming convention is the same as that followed by GCC, though it 676 // shouldn't actually matter. 677 if (ND && isa<VarDecl>(ND) && ND->getLinkage() == InternalLinkage && 678 ND->getDeclContext()->isFileContext()) 679 Out << 'L'; 680 681 mangleSourceName(II); 682 break; 683 } 684 685 // Otherwise, an anonymous entity. We must have a declaration. 686 assert(ND && "mangling empty name without declaration"); 687 688 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 689 if (NS->isAnonymousNamespace()) { 690 // This is how gcc mangles these names. 691 Out << "12_GLOBAL__N_1"; 692 break; 693 } 694 } 695 696 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { 697 // We must have an anonymous union or struct declaration. 698 const RecordDecl *RD = 699 cast<RecordDecl>(VD->getType()->getAs<RecordType>()->getDecl()); 700 701 // Itanium C++ ABI 5.1.2: 702 // 703 // For the purposes of mangling, the name of an anonymous union is 704 // considered to be the name of the first named data member found by a 705 // pre-order, depth-first, declaration-order walk of the data members of 706 // the anonymous union. If there is no such data member (i.e., if all of 707 // the data members in the union are unnamed), then there is no way for 708 // a program to refer to the anonymous union, and there is therefore no 709 // need to mangle its name. 710 const FieldDecl *FD = FindFirstNamedDataMember(RD); 711 712 // It's actually possible for various reasons for us to get here 713 // with an empty anonymous struct / union. Fortunately, it 714 // doesn't really matter what name we generate. 715 if (!FD) break; 716 assert(FD->getIdentifier() && "Data member name isn't an identifier!"); 717 718 mangleSourceName(FD->getIdentifier()); 719 break; 720 } 721 722 // We must have an anonymous struct. 723 const TagDecl *TD = cast<TagDecl>(ND); 724 if (const TypedefDecl *D = TD->getTypedefForAnonDecl()) { 725 assert(TD->getDeclContext() == D->getDeclContext() && 726 "Typedef should not be in another decl context!"); 727 assert(D->getDeclName().getAsIdentifierInfo() && 728 "Typedef was not named!"); 729 mangleSourceName(D->getDeclName().getAsIdentifierInfo()); 730 break; 731 } 732 733 // Get a unique id for the anonymous struct. 734 uint64_t AnonStructId = Context.getAnonymousStructId(TD); 735 736 // Mangle it as a source name in the form 737 // [n] $_<id> 738 // where n is the length of the string. 739 llvm::SmallString<8> Str; 740 Str += "$_"; 741 Str += llvm::utostr(AnonStructId); 742 743 Out << Str.size(); 744 Out << Str.str(); 745 break; 746 } 747 748 case DeclarationName::ObjCZeroArgSelector: 749 case DeclarationName::ObjCOneArgSelector: 750 case DeclarationName::ObjCMultiArgSelector: 751 assert(false && "Can't mangle Objective-C selector names here!"); 752 break; 753 754 case DeclarationName::CXXConstructorName: 755 if (ND == Structor) 756 // If the named decl is the C++ constructor we're mangling, use the type 757 // we were given. 758 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType)); 759 else 760 // Otherwise, use the complete constructor name. This is relevant if a 761 // class with a constructor is declared within a constructor. 762 mangleCXXCtorType(Ctor_Complete); 763 break; 764 765 case DeclarationName::CXXDestructorName: 766 if (ND == Structor) 767 // If the named decl is the C++ destructor we're mangling, use the type we 768 // were given. 769 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType)); 770 else 771 // Otherwise, use the complete destructor name. This is relevant if a 772 // class with a destructor is declared within a destructor. 773 mangleCXXDtorType(Dtor_Complete); 774 break; 775 776 case DeclarationName::CXXConversionFunctionName: 777 // <operator-name> ::= cv <type> # (cast) 778 Out << "cv"; 779 mangleType(Context.getASTContext().getCanonicalType(Name.getCXXNameType())); 780 break; 781 782 case DeclarationName::CXXOperatorName: { 783 unsigned Arity; 784 if (ND) { 785 Arity = cast<FunctionDecl>(ND)->getNumParams(); 786 787 // If we have a C++ member function, we need to include the 'this' pointer. 788 // FIXME: This does not make sense for operators that are static, but their 789 // names stay the same regardless of the arity (operator new for instance). 790 if (isa<CXXMethodDecl>(ND)) 791 Arity++; 792 } else 793 Arity = KnownArity; 794 795 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity); 796 break; 797 } 798 799 case DeclarationName::CXXLiteralOperatorName: 800 // FIXME: This mangling is not yet official. 801 Out << "li"; 802 mangleSourceName(Name.getCXXLiteralIdentifier()); 803 break; 804 805 case DeclarationName::CXXUsingDirective: 806 assert(false && "Can't mangle a using directive name!"); 807 break; 808 } 809} 810 811void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) { 812 // <source-name> ::= <positive length number> <identifier> 813 // <number> ::= [n] <non-negative decimal integer> 814 // <identifier> ::= <unqualified source code identifier> 815 Out << II->getLength() << II->getName(); 816} 817 818void CXXNameMangler::mangleNestedName(const NamedDecl *ND, 819 const DeclContext *DC, 820 bool NoFunction) { 821 // <nested-name> 822 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E 823 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix> 824 // <template-args> E 825 826 Out << 'N'; 827 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) { 828 mangleQualifiers(Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 829 mangleRefQualifier(Method->getRefQualifier()); 830 } 831 832 // Check if we have a template. 833 const TemplateArgumentList *TemplateArgs = 0; 834 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 835 mangleTemplatePrefix(TD); 836 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 837 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 838 } 839 else { 840 manglePrefix(DC, NoFunction); 841 mangleUnqualifiedName(ND); 842 } 843 844 Out << 'E'; 845} 846void CXXNameMangler::mangleNestedName(const TemplateDecl *TD, 847 const TemplateArgument *TemplateArgs, 848 unsigned NumTemplateArgs) { 849 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E 850 851 Out << 'N'; 852 853 mangleTemplatePrefix(TD); 854 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 855 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 856 857 Out << 'E'; 858} 859 860void CXXNameMangler::mangleLocalName(const NamedDecl *ND) { 861 // <local-name> := Z <function encoding> E <entity name> [<discriminator>] 862 // := Z <function encoding> E s [<discriminator>] 863 // <discriminator> := _ <non-negative number> 864 const DeclContext *DC = ND->getDeclContext(); 865 Out << 'Z'; 866 867 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC)) { 868 mangleObjCMethodName(MD); 869 } else if (const CXXRecordDecl *RD = GetLocalClassDecl(ND)) { 870 mangleFunctionEncoding(cast<FunctionDecl>(RD->getDeclContext())); 871 Out << 'E'; 872 873 // Mangle the name relative to the closest enclosing function. 874 if (ND == RD) // equality ok because RD derived from ND above 875 mangleUnqualifiedName(ND); 876 else 877 mangleNestedName(ND, DC, true /*NoFunction*/); 878 879 unsigned disc; 880 if (Context.getNextDiscriminator(RD, disc)) { 881 if (disc < 10) 882 Out << '_' << disc; 883 else 884 Out << "__" << disc << '_'; 885 } 886 887 return; 888 } 889 else 890 mangleFunctionEncoding(cast<FunctionDecl>(DC)); 891 892 Out << 'E'; 893 mangleUnqualifiedName(ND); 894} 895 896void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) { 897 // <prefix> ::= <prefix> <unqualified-name> 898 // ::= <template-prefix> <template-args> 899 // ::= <template-param> 900 // ::= # empty 901 // ::= <substitution> 902 903 while (isa<LinkageSpecDecl>(DC)) 904 DC = DC->getParent(); 905 906 if (DC->isTranslationUnit()) 907 return; 908 909 if (const BlockDecl *Block = dyn_cast<BlockDecl>(DC)) { 910 manglePrefix(DC->getParent(), NoFunction); 911 llvm::SmallString<64> Name; 912 Context.mangleBlock(Block, Name); 913 Out << Name.size() << Name; 914 return; 915 } 916 917 if (mangleSubstitution(cast<NamedDecl>(DC))) 918 return; 919 920 // Check if we have a template. 921 const TemplateArgumentList *TemplateArgs = 0; 922 if (const TemplateDecl *TD = isTemplate(cast<NamedDecl>(DC), TemplateArgs)) { 923 mangleTemplatePrefix(TD); 924 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 925 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 926 } 927 else if(NoFunction && (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC))) 928 return; 929 else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) 930 mangleObjCMethodName(Method); 931 else { 932 manglePrefix(DC->getParent(), NoFunction); 933 mangleUnqualifiedName(cast<NamedDecl>(DC)); 934 } 935 936 addSubstitution(cast<NamedDecl>(DC)); 937} 938 939void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) { 940 // <template-prefix> ::= <prefix> <template unqualified-name> 941 // ::= <template-param> 942 // ::= <substitution> 943 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 944 return mangleTemplatePrefix(TD); 945 946 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName()) 947 mangleUnresolvedScope(Qualified->getQualifier()); 948 949 if (OverloadedTemplateStorage *Overloaded 950 = Template.getAsOverloadedTemplate()) { 951 mangleUnqualifiedName(0, (*Overloaded->begin())->getDeclName(), 952 UnknownArity); 953 return; 954 } 955 956 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 957 assert(Dependent && "Unknown template name kind?"); 958 mangleUnresolvedScope(Dependent->getQualifier()); 959 mangleUnscopedTemplateName(Template); 960} 961 962void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) { 963 // <template-prefix> ::= <prefix> <template unqualified-name> 964 // ::= <template-param> 965 // ::= <substitution> 966 // <template-template-param> ::= <template-param> 967 // <substitution> 968 969 if (mangleSubstitution(ND)) 970 return; 971 972 // <template-template-param> ::= <template-param> 973 if (const TemplateTemplateParmDecl *TTP 974 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 975 mangleTemplateParameter(TTP->getIndex()); 976 return; 977 } 978 979 manglePrefix(ND->getDeclContext()); 980 mangleUnqualifiedName(ND->getTemplatedDecl()); 981 addSubstitution(ND); 982} 983 984/// Mangles a template name under the production <type>. Required for 985/// template template arguments. 986/// <type> ::= <class-enum-type> 987/// ::= <template-param> 988/// ::= <substitution> 989void CXXNameMangler::mangleType(TemplateName TN) { 990 if (mangleSubstitution(TN)) 991 return; 992 993 TemplateDecl *TD = 0; 994 995 switch (TN.getKind()) { 996 case TemplateName::QualifiedTemplate: 997 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl(); 998 goto HaveDecl; 999 1000 case TemplateName::Template: 1001 TD = TN.getAsTemplateDecl(); 1002 goto HaveDecl; 1003 1004 HaveDecl: 1005 if (isa<TemplateTemplateParmDecl>(TD)) 1006 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex()); 1007 else 1008 mangleName(TD); 1009 break; 1010 1011 case TemplateName::OverloadedTemplate: 1012 llvm_unreachable("can't mangle an overloaded template name as a <type>"); 1013 break; 1014 1015 case TemplateName::DependentTemplate: { 1016 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName(); 1017 assert(Dependent->isIdentifier()); 1018 1019 // <class-enum-type> ::= <name> 1020 // <name> ::= <nested-name> 1021 mangleUnresolvedScope(Dependent->getQualifier()); 1022 mangleSourceName(Dependent->getIdentifier()); 1023 break; 1024 } 1025 1026 case TemplateName::SubstTemplateTemplateParmPack: { 1027 SubstTemplateTemplateParmPackStorage *SubstPack 1028 = TN.getAsSubstTemplateTemplateParmPack(); 1029 mangleTemplateParameter(SubstPack->getParameterPack()->getIndex()); 1030 break; 1031 } 1032 } 1033 1034 addSubstitution(TN); 1035} 1036 1037void 1038CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) { 1039 switch (OO) { 1040 // <operator-name> ::= nw # new 1041 case OO_New: Out << "nw"; break; 1042 // ::= na # new[] 1043 case OO_Array_New: Out << "na"; break; 1044 // ::= dl # delete 1045 case OO_Delete: Out << "dl"; break; 1046 // ::= da # delete[] 1047 case OO_Array_Delete: Out << "da"; break; 1048 // ::= ps # + (unary) 1049 // ::= pl # + (binary or unknown) 1050 case OO_Plus: 1051 Out << (Arity == 1? "ps" : "pl"); break; 1052 // ::= ng # - (unary) 1053 // ::= mi # - (binary or unknown) 1054 case OO_Minus: 1055 Out << (Arity == 1? "ng" : "mi"); break; 1056 // ::= ad # & (unary) 1057 // ::= an # & (binary or unknown) 1058 case OO_Amp: 1059 Out << (Arity == 1? "ad" : "an"); break; 1060 // ::= de # * (unary) 1061 // ::= ml # * (binary or unknown) 1062 case OO_Star: 1063 // Use binary when unknown. 1064 Out << (Arity == 1? "de" : "ml"); break; 1065 // ::= co # ~ 1066 case OO_Tilde: Out << "co"; break; 1067 // ::= dv # / 1068 case OO_Slash: Out << "dv"; break; 1069 // ::= rm # % 1070 case OO_Percent: Out << "rm"; break; 1071 // ::= or # | 1072 case OO_Pipe: Out << "or"; break; 1073 // ::= eo # ^ 1074 case OO_Caret: Out << "eo"; break; 1075 // ::= aS # = 1076 case OO_Equal: Out << "aS"; break; 1077 // ::= pL # += 1078 case OO_PlusEqual: Out << "pL"; break; 1079 // ::= mI # -= 1080 case OO_MinusEqual: Out << "mI"; break; 1081 // ::= mL # *= 1082 case OO_StarEqual: Out << "mL"; break; 1083 // ::= dV # /= 1084 case OO_SlashEqual: Out << "dV"; break; 1085 // ::= rM # %= 1086 case OO_PercentEqual: Out << "rM"; break; 1087 // ::= aN # &= 1088 case OO_AmpEqual: Out << "aN"; break; 1089 // ::= oR # |= 1090 case OO_PipeEqual: Out << "oR"; break; 1091 // ::= eO # ^= 1092 case OO_CaretEqual: Out << "eO"; break; 1093 // ::= ls # << 1094 case OO_LessLess: Out << "ls"; break; 1095 // ::= rs # >> 1096 case OO_GreaterGreater: Out << "rs"; break; 1097 // ::= lS # <<= 1098 case OO_LessLessEqual: Out << "lS"; break; 1099 // ::= rS # >>= 1100 case OO_GreaterGreaterEqual: Out << "rS"; break; 1101 // ::= eq # == 1102 case OO_EqualEqual: Out << "eq"; break; 1103 // ::= ne # != 1104 case OO_ExclaimEqual: Out << "ne"; break; 1105 // ::= lt # < 1106 case OO_Less: Out << "lt"; break; 1107 // ::= gt # > 1108 case OO_Greater: Out << "gt"; break; 1109 // ::= le # <= 1110 case OO_LessEqual: Out << "le"; break; 1111 // ::= ge # >= 1112 case OO_GreaterEqual: Out << "ge"; break; 1113 // ::= nt # ! 1114 case OO_Exclaim: Out << "nt"; break; 1115 // ::= aa # && 1116 case OO_AmpAmp: Out << "aa"; break; 1117 // ::= oo # || 1118 case OO_PipePipe: Out << "oo"; break; 1119 // ::= pp # ++ 1120 case OO_PlusPlus: Out << "pp"; break; 1121 // ::= mm # -- 1122 case OO_MinusMinus: Out << "mm"; break; 1123 // ::= cm # , 1124 case OO_Comma: Out << "cm"; break; 1125 // ::= pm # ->* 1126 case OO_ArrowStar: Out << "pm"; break; 1127 // ::= pt # -> 1128 case OO_Arrow: Out << "pt"; break; 1129 // ::= cl # () 1130 case OO_Call: Out << "cl"; break; 1131 // ::= ix # [] 1132 case OO_Subscript: Out << "ix"; break; 1133 1134 // ::= qu # ? 1135 // The conditional operator can't be overloaded, but we still handle it when 1136 // mangling expressions. 1137 case OO_Conditional: Out << "qu"; break; 1138 1139 case OO_None: 1140 case NUM_OVERLOADED_OPERATORS: 1141 assert(false && "Not an overloaded operator"); 1142 break; 1143 } 1144} 1145 1146void CXXNameMangler::mangleQualifiers(Qualifiers Quals) { 1147 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const 1148 if (Quals.hasRestrict()) 1149 Out << 'r'; 1150 if (Quals.hasVolatile()) 1151 Out << 'V'; 1152 if (Quals.hasConst()) 1153 Out << 'K'; 1154 1155 if (Quals.hasAddressSpace()) { 1156 // Extension: 1157 // 1158 // <type> ::= U <address-space-number> 1159 // 1160 // where <address-space-number> is a source name consisting of 'AS' 1161 // followed by the address space <number>. 1162 llvm::SmallString<64> ASString; 1163 ASString = "AS" + llvm::utostr_32(Quals.getAddressSpace()); 1164 Out << 'U' << ASString.size() << ASString; 1165 } 1166 1167 // FIXME: For now, just drop all extension qualifiers on the floor. 1168} 1169 1170void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) { 1171 // <ref-qualifier> ::= R # lvalue reference 1172 // ::= O # rvalue-reference 1173 // Proposal to Itanium C++ ABI list on 1/26/11 1174 switch (RefQualifier) { 1175 case RQ_None: 1176 break; 1177 1178 case RQ_LValue: 1179 Out << 'R'; 1180 break; 1181 1182 case RQ_RValue: 1183 Out << 'O'; 1184 break; 1185 } 1186} 1187 1188void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) { 1189 llvm::SmallString<64> Buffer; 1190 Context.mangleObjCMethodName(MD, Buffer); 1191 Out << Buffer; 1192} 1193 1194void CXXNameMangler::mangleType(QualType nonCanon) { 1195 // Only operate on the canonical type! 1196 QualType canon = nonCanon.getCanonicalType(); 1197 1198 SplitQualType split = canon.split(); 1199 Qualifiers quals = split.second; 1200 const Type *ty = split.first; 1201 1202 bool isSubstitutable = quals || !isa<BuiltinType>(ty); 1203 if (isSubstitutable && mangleSubstitution(canon)) 1204 return; 1205 1206 // If we're mangling a qualified array type, push the qualifiers to 1207 // the element type. 1208 if (quals && isa<ArrayType>(ty)) { 1209 ty = Context.getASTContext().getAsArrayType(canon); 1210 quals = Qualifiers(); 1211 1212 // Note that we don't update canon: we want to add the 1213 // substitution at the canonical type. 1214 } 1215 1216 if (quals) { 1217 mangleQualifiers(quals); 1218 // Recurse: even if the qualified type isn't yet substitutable, 1219 // the unqualified type might be. 1220 mangleType(QualType(ty, 0)); 1221 } else { 1222 switch (ty->getTypeClass()) { 1223#define ABSTRACT_TYPE(CLASS, PARENT) 1224#define NON_CANONICAL_TYPE(CLASS, PARENT) \ 1225 case Type::CLASS: \ 1226 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \ 1227 return; 1228#define TYPE(CLASS, PARENT) \ 1229 case Type::CLASS: \ 1230 mangleType(static_cast<const CLASS##Type*>(ty)); \ 1231 break; 1232#include "clang/AST/TypeNodes.def" 1233 } 1234 } 1235 1236 // Add the substitution. 1237 if (isSubstitutable) 1238 addSubstitution(canon); 1239} 1240 1241void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) { 1242 if (!mangleStandardSubstitution(ND)) 1243 mangleName(ND); 1244} 1245 1246void CXXNameMangler::mangleType(const BuiltinType *T) { 1247 // <type> ::= <builtin-type> 1248 // <builtin-type> ::= v # void 1249 // ::= w # wchar_t 1250 // ::= b # bool 1251 // ::= c # char 1252 // ::= a # signed char 1253 // ::= h # unsigned char 1254 // ::= s # short 1255 // ::= t # unsigned short 1256 // ::= i # int 1257 // ::= j # unsigned int 1258 // ::= l # long 1259 // ::= m # unsigned long 1260 // ::= x # long long, __int64 1261 // ::= y # unsigned long long, __int64 1262 // ::= n # __int128 1263 // UNSUPPORTED: ::= o # unsigned __int128 1264 // ::= f # float 1265 // ::= d # double 1266 // ::= e # long double, __float80 1267 // UNSUPPORTED: ::= g # __float128 1268 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits) 1269 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits) 1270 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits) 1271 // UNSUPPORTED: ::= Dh # IEEE 754r half-precision floating point (16 bits) 1272 // ::= Di # char32_t 1273 // ::= Ds # char16_t 1274 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) 1275 // ::= u <source-name> # vendor extended type 1276 switch (T->getKind()) { 1277 case BuiltinType::Void: Out << 'v'; break; 1278 case BuiltinType::Bool: Out << 'b'; break; 1279 case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'c'; break; 1280 case BuiltinType::UChar: Out << 'h'; break; 1281 case BuiltinType::UShort: Out << 't'; break; 1282 case BuiltinType::UInt: Out << 'j'; break; 1283 case BuiltinType::ULong: Out << 'm'; break; 1284 case BuiltinType::ULongLong: Out << 'y'; break; 1285 case BuiltinType::UInt128: Out << 'o'; break; 1286 case BuiltinType::SChar: Out << 'a'; break; 1287 case BuiltinType::WChar_S: 1288 case BuiltinType::WChar_U: Out << 'w'; break; 1289 case BuiltinType::Char16: Out << "Ds"; break; 1290 case BuiltinType::Char32: Out << "Di"; break; 1291 case BuiltinType::Short: Out << 's'; break; 1292 case BuiltinType::Int: Out << 'i'; break; 1293 case BuiltinType::Long: Out << 'l'; break; 1294 case BuiltinType::LongLong: Out << 'x'; break; 1295 case BuiltinType::Int128: Out << 'n'; break; 1296 case BuiltinType::Float: Out << 'f'; break; 1297 case BuiltinType::Double: Out << 'd'; break; 1298 case BuiltinType::LongDouble: Out << 'e'; break; 1299 case BuiltinType::NullPtr: Out << "Dn"; break; 1300 1301 case BuiltinType::Overload: 1302 case BuiltinType::Dependent: 1303 assert(false && 1304 "Overloaded and dependent types shouldn't get to name mangling"); 1305 break; 1306 case BuiltinType::UndeducedAuto: 1307 assert(0 && "Should not see undeduced auto here"); 1308 break; 1309 case BuiltinType::ObjCId: Out << "11objc_object"; break; 1310 case BuiltinType::ObjCClass: Out << "10objc_class"; break; 1311 case BuiltinType::ObjCSel: Out << "13objc_selector"; break; 1312 } 1313} 1314 1315// <type> ::= <function-type> 1316// <function-type> ::= F [Y] <bare-function-type> E 1317void CXXNameMangler::mangleType(const FunctionProtoType *T) { 1318 Out << 'F'; 1319 // FIXME: We don't have enough information in the AST to produce the 'Y' 1320 // encoding for extern "C" function types. 1321 mangleBareFunctionType(T, /*MangleReturnType=*/true); 1322 Out << 'E'; 1323} 1324void CXXNameMangler::mangleType(const FunctionNoProtoType *T) { 1325 llvm_unreachable("Can't mangle K&R function prototypes"); 1326} 1327void CXXNameMangler::mangleBareFunctionType(const FunctionType *T, 1328 bool MangleReturnType) { 1329 // We should never be mangling something without a prototype. 1330 const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 1331 1332 // <bare-function-type> ::= <signature type>+ 1333 if (MangleReturnType) 1334 mangleType(Proto->getResultType()); 1335 1336 if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) { 1337 // <builtin-type> ::= v # void 1338 Out << 'v'; 1339 return; 1340 } 1341 1342 for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(), 1343 ArgEnd = Proto->arg_type_end(); 1344 Arg != ArgEnd; ++Arg) 1345 mangleType(*Arg); 1346 1347 // <builtin-type> ::= z # ellipsis 1348 if (Proto->isVariadic()) 1349 Out << 'z'; 1350} 1351 1352// <type> ::= <class-enum-type> 1353// <class-enum-type> ::= <name> 1354void CXXNameMangler::mangleType(const UnresolvedUsingType *T) { 1355 mangleName(T->getDecl()); 1356} 1357 1358// <type> ::= <class-enum-type> 1359// <class-enum-type> ::= <name> 1360void CXXNameMangler::mangleType(const EnumType *T) { 1361 mangleType(static_cast<const TagType*>(T)); 1362} 1363void CXXNameMangler::mangleType(const RecordType *T) { 1364 mangleType(static_cast<const TagType*>(T)); 1365} 1366void CXXNameMangler::mangleType(const TagType *T) { 1367 mangleName(T->getDecl()); 1368} 1369 1370// <type> ::= <array-type> 1371// <array-type> ::= A <positive dimension number> _ <element type> 1372// ::= A [<dimension expression>] _ <element type> 1373void CXXNameMangler::mangleType(const ConstantArrayType *T) { 1374 Out << 'A' << T->getSize() << '_'; 1375 mangleType(T->getElementType()); 1376} 1377void CXXNameMangler::mangleType(const VariableArrayType *T) { 1378 Out << 'A'; 1379 // decayed vla types (size 0) will just be skipped. 1380 if (T->getSizeExpr()) 1381 mangleExpression(T->getSizeExpr()); 1382 Out << '_'; 1383 mangleType(T->getElementType()); 1384} 1385void CXXNameMangler::mangleType(const DependentSizedArrayType *T) { 1386 Out << 'A'; 1387 mangleExpression(T->getSizeExpr()); 1388 Out << '_'; 1389 mangleType(T->getElementType()); 1390} 1391void CXXNameMangler::mangleType(const IncompleteArrayType *T) { 1392 Out << "A_"; 1393 mangleType(T->getElementType()); 1394} 1395 1396// <type> ::= <pointer-to-member-type> 1397// <pointer-to-member-type> ::= M <class type> <member type> 1398void CXXNameMangler::mangleType(const MemberPointerType *T) { 1399 Out << 'M'; 1400 mangleType(QualType(T->getClass(), 0)); 1401 QualType PointeeType = T->getPointeeType(); 1402 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) { 1403 mangleQualifiers(Qualifiers::fromCVRMask(FPT->getTypeQuals())); 1404 mangleRefQualifier(FPT->getRefQualifier()); 1405 mangleType(FPT); 1406 1407 // Itanium C++ ABI 5.1.8: 1408 // 1409 // The type of a non-static member function is considered to be different, 1410 // for the purposes of substitution, from the type of a namespace-scope or 1411 // static member function whose type appears similar. The types of two 1412 // non-static member functions are considered to be different, for the 1413 // purposes of substitution, if the functions are members of different 1414 // classes. In other words, for the purposes of substitution, the class of 1415 // which the function is a member is considered part of the type of 1416 // function. 1417 1418 // We increment the SeqID here to emulate adding an entry to the 1419 // substitution table. We can't actually add it because we don't want this 1420 // particular function type to be substituted. 1421 ++SeqID; 1422 } else 1423 mangleType(PointeeType); 1424} 1425 1426// <type> ::= <template-param> 1427void CXXNameMangler::mangleType(const TemplateTypeParmType *T) { 1428 mangleTemplateParameter(T->getIndex()); 1429} 1430 1431// <type> ::= <template-param> 1432void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) { 1433 mangleTemplateParameter(T->getReplacedParameter()->getIndex()); 1434} 1435 1436// <type> ::= P <type> # pointer-to 1437void CXXNameMangler::mangleType(const PointerType *T) { 1438 Out << 'P'; 1439 mangleType(T->getPointeeType()); 1440} 1441void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) { 1442 Out << 'P'; 1443 mangleType(T->getPointeeType()); 1444} 1445 1446// <type> ::= R <type> # reference-to 1447void CXXNameMangler::mangleType(const LValueReferenceType *T) { 1448 Out << 'R'; 1449 mangleType(T->getPointeeType()); 1450} 1451 1452// <type> ::= O <type> # rvalue reference-to (C++0x) 1453void CXXNameMangler::mangleType(const RValueReferenceType *T) { 1454 Out << 'O'; 1455 mangleType(T->getPointeeType()); 1456} 1457 1458// <type> ::= C <type> # complex pair (C 2000) 1459void CXXNameMangler::mangleType(const ComplexType *T) { 1460 Out << 'C'; 1461 mangleType(T->getElementType()); 1462} 1463 1464// ARM's ABI for Neon vector types specifies that they should be mangled as 1465// if they are structs (to match ARM's initial implementation). The 1466// vector type must be one of the special types predefined by ARM. 1467void CXXNameMangler::mangleNeonVectorType(const VectorType *T) { 1468 QualType EltType = T->getElementType(); 1469 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType"); 1470 const char *EltName = 0; 1471 if (T->getVectorKind() == VectorType::NeonPolyVector) { 1472 switch (cast<BuiltinType>(EltType)->getKind()) { 1473 case BuiltinType::SChar: EltName = "poly8_t"; break; 1474 case BuiltinType::Short: EltName = "poly16_t"; break; 1475 default: llvm_unreachable("unexpected Neon polynomial vector element type"); 1476 } 1477 } else { 1478 switch (cast<BuiltinType>(EltType)->getKind()) { 1479 case BuiltinType::SChar: EltName = "int8_t"; break; 1480 case BuiltinType::UChar: EltName = "uint8_t"; break; 1481 case BuiltinType::Short: EltName = "int16_t"; break; 1482 case BuiltinType::UShort: EltName = "uint16_t"; break; 1483 case BuiltinType::Int: EltName = "int32_t"; break; 1484 case BuiltinType::UInt: EltName = "uint32_t"; break; 1485 case BuiltinType::LongLong: EltName = "int64_t"; break; 1486 case BuiltinType::ULongLong: EltName = "uint64_t"; break; 1487 case BuiltinType::Float: EltName = "float32_t"; break; 1488 default: llvm_unreachable("unexpected Neon vector element type"); 1489 } 1490 } 1491 const char *BaseName = 0; 1492 unsigned BitSize = (T->getNumElements() * 1493 getASTContext().getTypeSize(EltType)); 1494 if (BitSize == 64) 1495 BaseName = "__simd64_"; 1496 else { 1497 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits"); 1498 BaseName = "__simd128_"; 1499 } 1500 Out << strlen(BaseName) + strlen(EltName); 1501 Out << BaseName << EltName; 1502} 1503 1504// GNU extension: vector types 1505// <type> ::= <vector-type> 1506// <vector-type> ::= Dv <positive dimension number> _ 1507// <extended element type> 1508// ::= Dv [<dimension expression>] _ <element type> 1509// <extended element type> ::= <element type> 1510// ::= p # AltiVec vector pixel 1511void CXXNameMangler::mangleType(const VectorType *T) { 1512 if ((T->getVectorKind() == VectorType::NeonVector || 1513 T->getVectorKind() == VectorType::NeonPolyVector)) { 1514 mangleNeonVectorType(T); 1515 return; 1516 } 1517 Out << "Dv" << T->getNumElements() << '_'; 1518 if (T->getVectorKind() == VectorType::AltiVecPixel) 1519 Out << 'p'; 1520 else if (T->getVectorKind() == VectorType::AltiVecBool) 1521 Out << 'b'; 1522 else 1523 mangleType(T->getElementType()); 1524} 1525void CXXNameMangler::mangleType(const ExtVectorType *T) { 1526 mangleType(static_cast<const VectorType*>(T)); 1527} 1528void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) { 1529 Out << "Dv"; 1530 mangleExpression(T->getSizeExpr()); 1531 Out << '_'; 1532 mangleType(T->getElementType()); 1533} 1534 1535void CXXNameMangler::mangleType(const PackExpansionType *T) { 1536 // <type> ::= Dp <type> # pack expansion (C++0x) 1537 Out << "Dp"; 1538 mangleType(T->getPattern()); 1539} 1540 1541void CXXNameMangler::mangleType(const ObjCInterfaceType *T) { 1542 mangleSourceName(T->getDecl()->getIdentifier()); 1543} 1544 1545void CXXNameMangler::mangleType(const ObjCObjectType *T) { 1546 // We don't allow overloading by different protocol qualification, 1547 // so mangling them isn't necessary. 1548 mangleType(T->getBaseType()); 1549} 1550 1551void CXXNameMangler::mangleType(const BlockPointerType *T) { 1552 Out << "U13block_pointer"; 1553 mangleType(T->getPointeeType()); 1554} 1555 1556void CXXNameMangler::mangleType(const InjectedClassNameType *T) { 1557 // Mangle injected class name types as if the user had written the 1558 // specialization out fully. It may not actually be possible to see 1559 // this mangling, though. 1560 mangleType(T->getInjectedSpecializationType()); 1561} 1562 1563void CXXNameMangler::mangleType(const TemplateSpecializationType *T) { 1564 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) { 1565 mangleName(TD, T->getArgs(), T->getNumArgs()); 1566 } else { 1567 if (mangleSubstitution(QualType(T, 0))) 1568 return; 1569 1570 mangleTemplatePrefix(T->getTemplateName()); 1571 1572 // FIXME: GCC does not appear to mangle the template arguments when 1573 // the template in question is a dependent template name. Should we 1574 // emulate that badness? 1575 mangleTemplateArgs(T->getTemplateName(), T->getArgs(), T->getNumArgs()); 1576 addSubstitution(QualType(T, 0)); 1577 } 1578} 1579 1580void CXXNameMangler::mangleType(const DependentNameType *T) { 1581 // Typename types are always nested 1582 Out << 'N'; 1583 mangleUnresolvedScope(T->getQualifier()); 1584 mangleSourceName(T->getIdentifier()); 1585 Out << 'E'; 1586} 1587 1588void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) { 1589 // Dependently-scoped template types are always nested 1590 Out << 'N'; 1591 1592 // TODO: avoid making this TemplateName. 1593 TemplateName Prefix = 1594 getASTContext().getDependentTemplateName(T->getQualifier(), 1595 T->getIdentifier()); 1596 mangleTemplatePrefix(Prefix); 1597 1598 // FIXME: GCC does not appear to mangle the template arguments when 1599 // the template in question is a dependent template name. Should we 1600 // emulate that badness? 1601 mangleTemplateArgs(Prefix, T->getArgs(), T->getNumArgs()); 1602 Out << 'E'; 1603} 1604 1605void CXXNameMangler::mangleType(const TypeOfType *T) { 1606 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 1607 // "extension with parameters" mangling. 1608 Out << "u6typeof"; 1609} 1610 1611void CXXNameMangler::mangleType(const TypeOfExprType *T) { 1612 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 1613 // "extension with parameters" mangling. 1614 Out << "u6typeof"; 1615} 1616 1617void CXXNameMangler::mangleType(const DecltypeType *T) { 1618 Expr *E = T->getUnderlyingExpr(); 1619 1620 // type ::= Dt <expression> E # decltype of an id-expression 1621 // # or class member access 1622 // ::= DT <expression> E # decltype of an expression 1623 1624 // This purports to be an exhaustive list of id-expressions and 1625 // class member accesses. Note that we do not ignore parentheses; 1626 // parentheses change the semantics of decltype for these 1627 // expressions (and cause the mangler to use the other form). 1628 if (isa<DeclRefExpr>(E) || 1629 isa<MemberExpr>(E) || 1630 isa<UnresolvedLookupExpr>(E) || 1631 isa<DependentScopeDeclRefExpr>(E) || 1632 isa<CXXDependentScopeMemberExpr>(E) || 1633 isa<UnresolvedMemberExpr>(E)) 1634 Out << "Dt"; 1635 else 1636 Out << "DT"; 1637 mangleExpression(E); 1638 Out << 'E'; 1639} 1640 1641void CXXNameMangler::mangleIntegerLiteral(QualType T, 1642 const llvm::APSInt &Value) { 1643 // <expr-primary> ::= L <type> <value number> E # integer literal 1644 Out << 'L'; 1645 1646 mangleType(T); 1647 if (T->isBooleanType()) { 1648 // Boolean values are encoded as 0/1. 1649 Out << (Value.getBoolValue() ? '1' : '0'); 1650 } else { 1651 mangleNumber(Value); 1652 } 1653 Out << 'E'; 1654 1655} 1656 1657/// Mangles a member expression. Implicit accesses are not handled, 1658/// but that should be okay, because you shouldn't be able to 1659/// make an implicit access in a function template declaration. 1660void CXXNameMangler::mangleMemberExpr(const Expr *Base, 1661 bool IsArrow, 1662 NestedNameSpecifier *Qualifier, 1663 DeclarationName Member, 1664 unsigned Arity) { 1665 // gcc-4.4 uses 'dt' for dot expressions, which is reasonable. 1666 // OTOH, gcc also mangles the name as an expression. 1667 Out << (IsArrow ? "pt" : "dt"); 1668 mangleExpression(Base); 1669 mangleUnresolvedName(Qualifier, Member, Arity); 1670} 1671 1672void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) { 1673 // <expression> ::= <unary operator-name> <expression> 1674 // ::= <binary operator-name> <expression> <expression> 1675 // ::= <trinary operator-name> <expression> <expression> <expression> 1676 // ::= cl <expression>* E # call 1677 // ::= cv <type> expression # conversion with one argument 1678 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments 1679 // ::= st <type> # sizeof (a type) 1680 // ::= at <type> # alignof (a type) 1681 // ::= <template-param> 1682 // ::= <function-param> 1683 // ::= sr <type> <unqualified-name> # dependent name 1684 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 1685 // ::= sZ <template-param> # size of a parameter pack 1686 // ::= sZ <function-param> # size of a function parameter pack 1687 // ::= <expr-primary> 1688 // <expr-primary> ::= L <type> <value number> E # integer literal 1689 // ::= L <type <value float> E # floating literal 1690 // ::= L <mangled-name> E # external name 1691 switch (E->getStmtClass()) { 1692 case Expr::NoStmtClass: 1693#define ABSTRACT_STMT(Type) 1694#define EXPR(Type, Base) 1695#define STMT(Type, Base) \ 1696 case Expr::Type##Class: 1697#include "clang/AST/StmtNodes.inc" 1698 // fallthrough 1699 1700 // These all can only appear in local or variable-initialization 1701 // contexts and so should never appear in a mangling. 1702 case Expr::AddrLabelExprClass: 1703 case Expr::BlockDeclRefExprClass: 1704 case Expr::CXXThisExprClass: 1705 case Expr::DesignatedInitExprClass: 1706 case Expr::ImplicitValueInitExprClass: 1707 case Expr::InitListExprClass: 1708 case Expr::ParenListExprClass: 1709 case Expr::CXXScalarValueInitExprClass: 1710 llvm_unreachable("unexpected statement kind"); 1711 break; 1712 1713 // FIXME: invent manglings for all these. 1714 case Expr::BlockExprClass: 1715 case Expr::CXXPseudoDestructorExprClass: 1716 case Expr::ChooseExprClass: 1717 case Expr::CompoundLiteralExprClass: 1718 case Expr::ExtVectorElementExprClass: 1719 case Expr::ObjCEncodeExprClass: 1720 case Expr::ObjCIsaExprClass: 1721 case Expr::ObjCIvarRefExprClass: 1722 case Expr::ObjCMessageExprClass: 1723 case Expr::ObjCPropertyRefExprClass: 1724 case Expr::ObjCProtocolExprClass: 1725 case Expr::ObjCSelectorExprClass: 1726 case Expr::ObjCStringLiteralClass: 1727 case Expr::OffsetOfExprClass: 1728 case Expr::PredefinedExprClass: 1729 case Expr::ShuffleVectorExprClass: 1730 case Expr::StmtExprClass: 1731 case Expr::UnaryTypeTraitExprClass: 1732 case Expr::BinaryTypeTraitExprClass: 1733 case Expr::VAArgExprClass: 1734 case Expr::CXXUuidofExprClass: 1735 case Expr::CXXNoexceptExprClass: { 1736 // As bad as this diagnostic is, it's better than crashing. 1737 Diagnostic &Diags = Context.getDiags(); 1738 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 1739 "cannot yet mangle expression type %0"); 1740 Diags.Report(E->getExprLoc(), DiagID) 1741 << E->getStmtClassName() << E->getSourceRange(); 1742 break; 1743 } 1744 1745 case Expr::OpaqueValueExprClass: 1746 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?"); 1747 1748 case Expr::CXXDefaultArgExprClass: 1749 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity); 1750 break; 1751 1752 case Expr::CXXMemberCallExprClass: // fallthrough 1753 case Expr::CallExprClass: { 1754 const CallExpr *CE = cast<CallExpr>(E); 1755 Out << "cl"; 1756 mangleExpression(CE->getCallee(), CE->getNumArgs()); 1757 for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I) 1758 mangleExpression(CE->getArg(I)); 1759 Out << 'E'; 1760 break; 1761 } 1762 1763 case Expr::CXXNewExprClass: { 1764 // Proposal from David Vandervoorde, 2010.06.30 1765 const CXXNewExpr *New = cast<CXXNewExpr>(E); 1766 if (New->isGlobalNew()) Out << "gs"; 1767 Out << (New->isArray() ? "na" : "nw"); 1768 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(), 1769 E = New->placement_arg_end(); I != E; ++I) 1770 mangleExpression(*I); 1771 Out << '_'; 1772 mangleType(New->getAllocatedType()); 1773 if (New->hasInitializer()) { 1774 Out << "pi"; 1775 for (CXXNewExpr::const_arg_iterator I = New->constructor_arg_begin(), 1776 E = New->constructor_arg_end(); I != E; ++I) 1777 mangleExpression(*I); 1778 } 1779 Out << 'E'; 1780 break; 1781 } 1782 1783 case Expr::MemberExprClass: { 1784 const MemberExpr *ME = cast<MemberExpr>(E); 1785 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1786 ME->getQualifier(), ME->getMemberDecl()->getDeclName(), 1787 Arity); 1788 break; 1789 } 1790 1791 case Expr::UnresolvedMemberExprClass: { 1792 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E); 1793 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1794 ME->getQualifier(), ME->getMemberName(), 1795 Arity); 1796 if (ME->hasExplicitTemplateArgs()) 1797 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 1798 break; 1799 } 1800 1801 case Expr::CXXDependentScopeMemberExprClass: { 1802 const CXXDependentScopeMemberExpr *ME 1803 = cast<CXXDependentScopeMemberExpr>(E); 1804 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1805 ME->getQualifier(), ME->getMember(), 1806 Arity); 1807 if (ME->hasExplicitTemplateArgs()) 1808 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 1809 break; 1810 } 1811 1812 case Expr::UnresolvedLookupExprClass: { 1813 // The ABI doesn't cover how to mangle overload sets, so we mangle 1814 // using something as close as possible to the original lookup 1815 // expression. 1816 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E); 1817 mangleUnresolvedName(ULE->getQualifier(), ULE->getName(), Arity); 1818 if (ULE->hasExplicitTemplateArgs()) 1819 mangleTemplateArgs(ULE->getExplicitTemplateArgs()); 1820 break; 1821 } 1822 1823 case Expr::CXXUnresolvedConstructExprClass: { 1824 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E); 1825 unsigned N = CE->arg_size(); 1826 1827 Out << "cv"; 1828 mangleType(CE->getType()); 1829 if (N != 1) Out << '_'; 1830 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 1831 if (N != 1) Out << 'E'; 1832 break; 1833 } 1834 1835 case Expr::CXXTemporaryObjectExprClass: 1836 case Expr::CXXConstructExprClass: { 1837 const CXXConstructExpr *CE = cast<CXXConstructExpr>(E); 1838 unsigned N = CE->getNumArgs(); 1839 1840 Out << "cv"; 1841 mangleType(CE->getType()); 1842 if (N != 1) Out << '_'; 1843 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 1844 if (N != 1) Out << 'E'; 1845 break; 1846 } 1847 1848 case Expr::SizeOfAlignOfExprClass: { 1849 const SizeOfAlignOfExpr *SAE = cast<SizeOfAlignOfExpr>(E); 1850 if (SAE->isSizeOf()) Out << 's'; 1851 else Out << 'a'; 1852 if (SAE->isArgumentType()) { 1853 Out << 't'; 1854 mangleType(SAE->getArgumentType()); 1855 } else { 1856 Out << 'z'; 1857 mangleExpression(SAE->getArgumentExpr()); 1858 } 1859 break; 1860 } 1861 1862 case Expr::CXXThrowExprClass: { 1863 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E); 1864 1865 // Proposal from David Vandervoorde, 2010.06.30 1866 if (TE->getSubExpr()) { 1867 Out << "tw"; 1868 mangleExpression(TE->getSubExpr()); 1869 } else { 1870 Out << "tr"; 1871 } 1872 break; 1873 } 1874 1875 case Expr::CXXTypeidExprClass: { 1876 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E); 1877 1878 // Proposal from David Vandervoorde, 2010.06.30 1879 if (TIE->isTypeOperand()) { 1880 Out << "ti"; 1881 mangleType(TIE->getTypeOperand()); 1882 } else { 1883 Out << "te"; 1884 mangleExpression(TIE->getExprOperand()); 1885 } 1886 break; 1887 } 1888 1889 case Expr::CXXDeleteExprClass: { 1890 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E); 1891 1892 // Proposal from David Vandervoorde, 2010.06.30 1893 if (DE->isGlobalDelete()) Out << "gs"; 1894 Out << (DE->isArrayForm() ? "da" : "dl"); 1895 mangleExpression(DE->getArgument()); 1896 break; 1897 } 1898 1899 case Expr::UnaryOperatorClass: { 1900 const UnaryOperator *UO = cast<UnaryOperator>(E); 1901 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()), 1902 /*Arity=*/1); 1903 mangleExpression(UO->getSubExpr()); 1904 break; 1905 } 1906 1907 case Expr::ArraySubscriptExprClass: { 1908 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E); 1909 1910 // Array subscript is treated as a syntactically wierd form of 1911 // binary operator. 1912 Out << "ix"; 1913 mangleExpression(AE->getLHS()); 1914 mangleExpression(AE->getRHS()); 1915 break; 1916 } 1917 1918 case Expr::CompoundAssignOperatorClass: // fallthrough 1919 case Expr::BinaryOperatorClass: { 1920 const BinaryOperator *BO = cast<BinaryOperator>(E); 1921 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()), 1922 /*Arity=*/2); 1923 mangleExpression(BO->getLHS()); 1924 mangleExpression(BO->getRHS()); 1925 break; 1926 } 1927 1928 case Expr::ConditionalOperatorClass: { 1929 const ConditionalOperator *CO = cast<ConditionalOperator>(E); 1930 mangleOperatorName(OO_Conditional, /*Arity=*/3); 1931 mangleExpression(CO->getCond()); 1932 mangleExpression(CO->getLHS(), Arity); 1933 mangleExpression(CO->getRHS(), Arity); 1934 break; 1935 } 1936 1937 case Expr::ImplicitCastExprClass: { 1938 mangleExpression(cast<ImplicitCastExpr>(E)->getSubExpr(), Arity); 1939 break; 1940 } 1941 1942 case Expr::CStyleCastExprClass: 1943 case Expr::CXXStaticCastExprClass: 1944 case Expr::CXXDynamicCastExprClass: 1945 case Expr::CXXReinterpretCastExprClass: 1946 case Expr::CXXConstCastExprClass: 1947 case Expr::CXXFunctionalCastExprClass: { 1948 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E); 1949 Out << "cv"; 1950 mangleType(ECE->getType()); 1951 mangleExpression(ECE->getSubExpr()); 1952 break; 1953 } 1954 1955 case Expr::CXXOperatorCallExprClass: { 1956 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E); 1957 unsigned NumArgs = CE->getNumArgs(); 1958 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs); 1959 // Mangle the arguments. 1960 for (unsigned i = 0; i != NumArgs; ++i) 1961 mangleExpression(CE->getArg(i)); 1962 break; 1963 } 1964 1965 case Expr::ParenExprClass: 1966 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity); 1967 break; 1968 1969 case Expr::DeclRefExprClass: { 1970 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 1971 1972 switch (D->getKind()) { 1973 default: 1974 // <expr-primary> ::= L <mangled-name> E # external name 1975 Out << 'L'; 1976 mangle(D, "_Z"); 1977 Out << 'E'; 1978 break; 1979 1980 case Decl::EnumConstant: { 1981 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D); 1982 mangleIntegerLiteral(ED->getType(), ED->getInitVal()); 1983 break; 1984 } 1985 1986 case Decl::NonTypeTemplateParm: { 1987 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D); 1988 mangleTemplateParameter(PD->getIndex()); 1989 break; 1990 } 1991 1992 } 1993 1994 break; 1995 } 1996 1997 case Expr::SubstNonTypeTemplateParmPackExprClass: 1998 mangleTemplateParameter( 1999 cast<SubstNonTypeTemplateParmPackExpr>(E)->getParameterPack()->getIndex()); 2000 break; 2001 2002 case Expr::DependentScopeDeclRefExprClass: { 2003 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E); 2004 NestedNameSpecifier *NNS = DRE->getQualifier(); 2005 const Type *QTy = NNS->getAsType(); 2006 2007 // When we're dealing with a nested-name-specifier that has just a 2008 // dependent identifier in it, mangle that as a typename. FIXME: 2009 // It isn't clear that we ever actually want to have such a 2010 // nested-name-specifier; why not just represent it as a typename type? 2011 if (!QTy && NNS->getAsIdentifier() && NNS->getPrefix()) { 2012 QTy = getASTContext().getDependentNameType(ETK_Typename, 2013 NNS->getPrefix(), 2014 NNS->getAsIdentifier()) 2015 .getTypePtr(); 2016 } 2017 assert(QTy && "Qualifier was not type!"); 2018 2019 // ::= sr <type> <unqualified-name> # dependent name 2020 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 2021 Out << "sr"; 2022 mangleType(QualType(QTy, 0)); 2023 mangleUnqualifiedName(0, DRE->getDeclName(), Arity); 2024 if (DRE->hasExplicitTemplateArgs()) 2025 mangleTemplateArgs(DRE->getExplicitTemplateArgs()); 2026 2027 break; 2028 } 2029 2030 case Expr::CXXBindTemporaryExprClass: 2031 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr()); 2032 break; 2033 2034 case Expr::ExprWithCleanupsClass: 2035 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity); 2036 break; 2037 2038 case Expr::FloatingLiteralClass: { 2039 const FloatingLiteral *FL = cast<FloatingLiteral>(E); 2040 Out << 'L'; 2041 mangleType(FL->getType()); 2042 mangleFloat(FL->getValue()); 2043 Out << 'E'; 2044 break; 2045 } 2046 2047 case Expr::CharacterLiteralClass: 2048 Out << 'L'; 2049 mangleType(E->getType()); 2050 Out << cast<CharacterLiteral>(E)->getValue(); 2051 Out << 'E'; 2052 break; 2053 2054 case Expr::CXXBoolLiteralExprClass: 2055 Out << "Lb"; 2056 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2057 Out << 'E'; 2058 break; 2059 2060 case Expr::IntegerLiteralClass: { 2061 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue()); 2062 if (E->getType()->isSignedIntegerType()) 2063 Value.setIsSigned(true); 2064 mangleIntegerLiteral(E->getType(), Value); 2065 break; 2066 } 2067 2068 case Expr::ImaginaryLiteralClass: { 2069 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E); 2070 // Mangle as if a complex literal. 2071 // Proposal from David Vandevoorde, 2010.06.30. 2072 Out << 'L'; 2073 mangleType(E->getType()); 2074 if (const FloatingLiteral *Imag = 2075 dyn_cast<FloatingLiteral>(IE->getSubExpr())) { 2076 // Mangle a floating-point zero of the appropriate type. 2077 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics())); 2078 Out << '_'; 2079 mangleFloat(Imag->getValue()); 2080 } else { 2081 Out << "0_"; 2082 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue()); 2083 if (IE->getSubExpr()->getType()->isSignedIntegerType()) 2084 Value.setIsSigned(true); 2085 mangleNumber(Value); 2086 } 2087 Out << 'E'; 2088 break; 2089 } 2090 2091 case Expr::StringLiteralClass: { 2092 // Revised proposal from David Vandervoorde, 2010.07.15. 2093 Out << 'L'; 2094 assert(isa<ConstantArrayType>(E->getType())); 2095 mangleType(E->getType()); 2096 Out << 'E'; 2097 break; 2098 } 2099 2100 case Expr::GNUNullExprClass: 2101 // FIXME: should this really be mangled the same as nullptr? 2102 // fallthrough 2103 2104 case Expr::CXXNullPtrLiteralExprClass: { 2105 // Proposal from David Vandervoorde, 2010.06.30, as 2106 // modified by ABI list discussion. 2107 Out << "LDnE"; 2108 break; 2109 } 2110 2111 case Expr::PackExpansionExprClass: 2112 Out << "sp"; 2113 mangleExpression(cast<PackExpansionExpr>(E)->getPattern()); 2114 break; 2115 2116 case Expr::SizeOfPackExprClass: { 2117 Out << "sZ"; 2118 const NamedDecl *Pack = cast<SizeOfPackExpr>(E)->getPack(); 2119 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack)) 2120 mangleTemplateParameter(TTP->getIndex()); 2121 else if (const NonTypeTemplateParmDecl *NTTP 2122 = dyn_cast<NonTypeTemplateParmDecl>(Pack)) 2123 mangleTemplateParameter(NTTP->getIndex()); 2124 else if (const TemplateTemplateParmDecl *TempTP 2125 = dyn_cast<TemplateTemplateParmDecl>(Pack)) 2126 mangleTemplateParameter(TempTP->getIndex()); 2127 else { 2128 // Note: proposed by Mike Herrick on 11/30/10 2129 // <expression> ::= sZ <function-param> # size of function parameter pack 2130 Diagnostic &Diags = Context.getDiags(); 2131 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 2132 "cannot mangle sizeof...(function parameter pack)"); 2133 Diags.Report(DiagID); 2134 return; 2135 } 2136 } 2137 } 2138} 2139 2140void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) { 2141 // <ctor-dtor-name> ::= C1 # complete object constructor 2142 // ::= C2 # base object constructor 2143 // ::= C3 # complete object allocating constructor 2144 // 2145 switch (T) { 2146 case Ctor_Complete: 2147 Out << "C1"; 2148 break; 2149 case Ctor_Base: 2150 Out << "C2"; 2151 break; 2152 case Ctor_CompleteAllocating: 2153 Out << "C3"; 2154 break; 2155 } 2156} 2157 2158void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) { 2159 // <ctor-dtor-name> ::= D0 # deleting destructor 2160 // ::= D1 # complete object destructor 2161 // ::= D2 # base object destructor 2162 // 2163 switch (T) { 2164 case Dtor_Deleting: 2165 Out << "D0"; 2166 break; 2167 case Dtor_Complete: 2168 Out << "D1"; 2169 break; 2170 case Dtor_Base: 2171 Out << "D2"; 2172 break; 2173 } 2174} 2175 2176void CXXNameMangler::mangleTemplateArgs( 2177 const ExplicitTemplateArgumentList &TemplateArgs) { 2178 // <template-args> ::= I <template-arg>+ E 2179 Out << 'I'; 2180 for (unsigned I = 0, E = TemplateArgs.NumTemplateArgs; I != E; ++I) 2181 mangleTemplateArg(0, TemplateArgs.getTemplateArgs()[I].getArgument()); 2182 Out << 'E'; 2183} 2184 2185void CXXNameMangler::mangleTemplateArgs(TemplateName Template, 2186 const TemplateArgument *TemplateArgs, 2187 unsigned NumTemplateArgs) { 2188 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2189 return mangleTemplateArgs(*TD->getTemplateParameters(), TemplateArgs, 2190 NumTemplateArgs); 2191 2192 // <template-args> ::= I <template-arg>+ E 2193 Out << 'I'; 2194 for (unsigned i = 0; i != NumTemplateArgs; ++i) 2195 mangleTemplateArg(0, TemplateArgs[i]); 2196 Out << 'E'; 2197} 2198 2199void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2200 const TemplateArgumentList &AL) { 2201 // <template-args> ::= I <template-arg>+ E 2202 Out << 'I'; 2203 for (unsigned i = 0, e = AL.size(); i != e; ++i) 2204 mangleTemplateArg(PL.getParam(i), AL[i]); 2205 Out << 'E'; 2206} 2207 2208void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2209 const TemplateArgument *TemplateArgs, 2210 unsigned NumTemplateArgs) { 2211 // <template-args> ::= I <template-arg>+ E 2212 Out << 'I'; 2213 for (unsigned i = 0; i != NumTemplateArgs; ++i) 2214 mangleTemplateArg(PL.getParam(i), TemplateArgs[i]); 2215 Out << 'E'; 2216} 2217 2218void CXXNameMangler::mangleTemplateArg(const NamedDecl *P, 2219 const TemplateArgument &A) { 2220 // <template-arg> ::= <type> # type or template 2221 // ::= X <expression> E # expression 2222 // ::= <expr-primary> # simple expressions 2223 // ::= J <template-arg>* E # argument pack 2224 // ::= sp <expression> # pack expansion of (C++0x) 2225 switch (A.getKind()) { 2226 case TemplateArgument::Null: 2227 llvm_unreachable("Cannot mangle NULL template argument"); 2228 2229 case TemplateArgument::Type: 2230 mangleType(A.getAsType()); 2231 break; 2232 case TemplateArgument::Template: 2233 // This is mangled as <type>. 2234 mangleType(A.getAsTemplate()); 2235 break; 2236 case TemplateArgument::TemplateExpansion: 2237 // <type> ::= Dp <type> # pack expansion (C++0x) 2238 Out << "Dp"; 2239 mangleType(A.getAsTemplateOrTemplatePattern()); 2240 break; 2241 case TemplateArgument::Expression: 2242 Out << 'X'; 2243 mangleExpression(A.getAsExpr()); 2244 Out << 'E'; 2245 break; 2246 case TemplateArgument::Integral: 2247 mangleIntegerLiteral(A.getIntegralType(), *A.getAsIntegral()); 2248 break; 2249 case TemplateArgument::Declaration: { 2250 assert(P && "Missing template parameter for declaration argument"); 2251 // <expr-primary> ::= L <mangled-name> E # external name 2252 2253 // Clang produces AST's where pointer-to-member-function expressions 2254 // and pointer-to-function expressions are represented as a declaration not 2255 // an expression. We compensate for it here to produce the correct mangling. 2256 NamedDecl *D = cast<NamedDecl>(A.getAsDecl()); 2257 const NonTypeTemplateParmDecl *Parameter = cast<NonTypeTemplateParmDecl>(P); 2258 bool compensateMangling = D->isCXXClassMember() && 2259 !Parameter->getType()->isReferenceType(); 2260 if (compensateMangling) { 2261 Out << 'X'; 2262 mangleOperatorName(OO_Amp, 1); 2263 } 2264 2265 Out << 'L'; 2266 // References to external entities use the mangled name; if the name would 2267 // not normally be manged then mangle it as unqualified. 2268 // 2269 // FIXME: The ABI specifies that external names here should have _Z, but 2270 // gcc leaves this off. 2271 if (compensateMangling) 2272 mangle(D, "_Z"); 2273 else 2274 mangle(D, "Z"); 2275 Out << 'E'; 2276 2277 if (compensateMangling) 2278 Out << 'E'; 2279 2280 break; 2281 } 2282 2283 case TemplateArgument::Pack: { 2284 // Note: proposal by Mike Herrick on 12/20/10 2285 Out << 'J'; 2286 for (TemplateArgument::pack_iterator PA = A.pack_begin(), 2287 PAEnd = A.pack_end(); 2288 PA != PAEnd; ++PA) 2289 mangleTemplateArg(P, *PA); 2290 Out << 'E'; 2291 } 2292 } 2293} 2294 2295void CXXNameMangler::mangleTemplateParameter(unsigned Index) { 2296 // <template-param> ::= T_ # first template parameter 2297 // ::= T <parameter-2 non-negative number> _ 2298 if (Index == 0) 2299 Out << "T_"; 2300 else 2301 Out << 'T' << (Index - 1) << '_'; 2302} 2303 2304// <substitution> ::= S <seq-id> _ 2305// ::= S_ 2306bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) { 2307 // Try one of the standard substitutions first. 2308 if (mangleStandardSubstitution(ND)) 2309 return true; 2310 2311 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 2312 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND)); 2313} 2314 2315bool CXXNameMangler::mangleSubstitution(QualType T) { 2316 if (!T.getCVRQualifiers()) { 2317 if (const RecordType *RT = T->getAs<RecordType>()) 2318 return mangleSubstitution(RT->getDecl()); 2319 } 2320 2321 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 2322 2323 return mangleSubstitution(TypePtr); 2324} 2325 2326bool CXXNameMangler::mangleSubstitution(TemplateName Template) { 2327 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2328 return mangleSubstitution(TD); 2329 2330 Template = Context.getASTContext().getCanonicalTemplateName(Template); 2331 return mangleSubstitution( 2332 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 2333} 2334 2335bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) { 2336 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr); 2337 if (I == Substitutions.end()) 2338 return false; 2339 2340 unsigned SeqID = I->second; 2341 if (SeqID == 0) 2342 Out << "S_"; 2343 else { 2344 SeqID--; 2345 2346 // <seq-id> is encoded in base-36, using digits and upper case letters. 2347 char Buffer[10]; 2348 char *BufferPtr = llvm::array_endof(Buffer); 2349 2350 if (SeqID == 0) *--BufferPtr = '0'; 2351 2352 while (SeqID) { 2353 assert(BufferPtr > Buffer && "Buffer overflow!"); 2354 2355 char c = static_cast<char>(SeqID % 36); 2356 2357 *--BufferPtr = (c < 10 ? '0' + c : 'A' + c - 10); 2358 SeqID /= 36; 2359 } 2360 2361 Out << 'S' 2362 << llvm::StringRef(BufferPtr, llvm::array_endof(Buffer)-BufferPtr) 2363 << '_'; 2364 } 2365 2366 return true; 2367} 2368 2369static bool isCharType(QualType T) { 2370 if (T.isNull()) 2371 return false; 2372 2373 return T->isSpecificBuiltinType(BuiltinType::Char_S) || 2374 T->isSpecificBuiltinType(BuiltinType::Char_U); 2375} 2376 2377/// isCharSpecialization - Returns whether a given type is a template 2378/// specialization of a given name with a single argument of type char. 2379static bool isCharSpecialization(QualType T, const char *Name) { 2380 if (T.isNull()) 2381 return false; 2382 2383 const RecordType *RT = T->getAs<RecordType>(); 2384 if (!RT) 2385 return false; 2386 2387 const ClassTemplateSpecializationDecl *SD = 2388 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); 2389 if (!SD) 2390 return false; 2391 2392 if (!isStdNamespace(SD->getDeclContext())) 2393 return false; 2394 2395 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2396 if (TemplateArgs.size() != 1) 2397 return false; 2398 2399 if (!isCharType(TemplateArgs[0].getAsType())) 2400 return false; 2401 2402 return SD->getIdentifier()->getName() == Name; 2403} 2404 2405template <std::size_t StrLen> 2406static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD, 2407 const char (&Str)[StrLen]) { 2408 if (!SD->getIdentifier()->isStr(Str)) 2409 return false; 2410 2411 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2412 if (TemplateArgs.size() != 2) 2413 return false; 2414 2415 if (!isCharType(TemplateArgs[0].getAsType())) 2416 return false; 2417 2418 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 2419 return false; 2420 2421 return true; 2422} 2423 2424bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) { 2425 // <substitution> ::= St # ::std:: 2426 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 2427 if (isStd(NS)) { 2428 Out << "St"; 2429 return true; 2430 } 2431 } 2432 2433 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) { 2434 if (!isStdNamespace(TD->getDeclContext())) 2435 return false; 2436 2437 // <substitution> ::= Sa # ::std::allocator 2438 if (TD->getIdentifier()->isStr("allocator")) { 2439 Out << "Sa"; 2440 return true; 2441 } 2442 2443 // <<substitution> ::= Sb # ::std::basic_string 2444 if (TD->getIdentifier()->isStr("basic_string")) { 2445 Out << "Sb"; 2446 return true; 2447 } 2448 } 2449 2450 if (const ClassTemplateSpecializationDecl *SD = 2451 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 2452 if (!isStdNamespace(SD->getDeclContext())) 2453 return false; 2454 2455 // <substitution> ::= Ss # ::std::basic_string<char, 2456 // ::std::char_traits<char>, 2457 // ::std::allocator<char> > 2458 if (SD->getIdentifier()->isStr("basic_string")) { 2459 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2460 2461 if (TemplateArgs.size() != 3) 2462 return false; 2463 2464 if (!isCharType(TemplateArgs[0].getAsType())) 2465 return false; 2466 2467 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 2468 return false; 2469 2470 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator")) 2471 return false; 2472 2473 Out << "Ss"; 2474 return true; 2475 } 2476 2477 // <substitution> ::= Si # ::std::basic_istream<char, 2478 // ::std::char_traits<char> > 2479 if (isStreamCharSpecialization(SD, "basic_istream")) { 2480 Out << "Si"; 2481 return true; 2482 } 2483 2484 // <substitution> ::= So # ::std::basic_ostream<char, 2485 // ::std::char_traits<char> > 2486 if (isStreamCharSpecialization(SD, "basic_ostream")) { 2487 Out << "So"; 2488 return true; 2489 } 2490 2491 // <substitution> ::= Sd # ::std::basic_iostream<char, 2492 // ::std::char_traits<char> > 2493 if (isStreamCharSpecialization(SD, "basic_iostream")) { 2494 Out << "Sd"; 2495 return true; 2496 } 2497 } 2498 return false; 2499} 2500 2501void CXXNameMangler::addSubstitution(QualType T) { 2502 if (!T.getCVRQualifiers()) { 2503 if (const RecordType *RT = T->getAs<RecordType>()) { 2504 addSubstitution(RT->getDecl()); 2505 return; 2506 } 2507 } 2508 2509 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 2510 addSubstitution(TypePtr); 2511} 2512 2513void CXXNameMangler::addSubstitution(TemplateName Template) { 2514 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2515 return addSubstitution(TD); 2516 2517 Template = Context.getASTContext().getCanonicalTemplateName(Template); 2518 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 2519} 2520 2521void CXXNameMangler::addSubstitution(uintptr_t Ptr) { 2522 assert(!Substitutions.count(Ptr) && "Substitution already exists!"); 2523 Substitutions[Ptr] = SeqID++; 2524} 2525 2526// 2527 2528/// \brief Mangles the name of the declaration D and emits that name to the 2529/// given output stream. 2530/// 2531/// If the declaration D requires a mangled name, this routine will emit that 2532/// mangled name to \p os and return true. Otherwise, \p os will be unchanged 2533/// and this routine will return false. In this case, the caller should just 2534/// emit the identifier of the declaration (\c D->getIdentifier()) as its 2535/// name. 2536void ItaniumMangleContext::mangleName(const NamedDecl *D, 2537 llvm::SmallVectorImpl<char> &Res) { 2538 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) && 2539 "Invalid mangleName() call, argument is not a variable or function!"); 2540 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) && 2541 "Invalid mangleName() call on 'structor decl!"); 2542 2543 PrettyStackTraceDecl CrashInfo(D, SourceLocation(), 2544 getASTContext().getSourceManager(), 2545 "Mangling declaration"); 2546 2547 CXXNameMangler Mangler(*this, Res); 2548 return Mangler.mangle(D); 2549} 2550 2551void ItaniumMangleContext::mangleCXXCtor(const CXXConstructorDecl *D, 2552 CXXCtorType Type, 2553 llvm::SmallVectorImpl<char> &Res) { 2554 CXXNameMangler Mangler(*this, Res, D, Type); 2555 Mangler.mangle(D); 2556} 2557 2558void ItaniumMangleContext::mangleCXXDtor(const CXXDestructorDecl *D, 2559 CXXDtorType Type, 2560 llvm::SmallVectorImpl<char> &Res) { 2561 CXXNameMangler Mangler(*this, Res, D, Type); 2562 Mangler.mangle(D); 2563} 2564 2565void ItaniumMangleContext::mangleThunk(const CXXMethodDecl *MD, 2566 const ThunkInfo &Thunk, 2567 llvm::SmallVectorImpl<char> &Res) { 2568 // <special-name> ::= T <call-offset> <base encoding> 2569 // # base is the nominal target function of thunk 2570 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding> 2571 // # base is the nominal target function of thunk 2572 // # first call-offset is 'this' adjustment 2573 // # second call-offset is result adjustment 2574 2575 assert(!isa<CXXDestructorDecl>(MD) && 2576 "Use mangleCXXDtor for destructor decls!"); 2577 2578 CXXNameMangler Mangler(*this, Res); 2579 Mangler.getStream() << "_ZT"; 2580 if (!Thunk.Return.isEmpty()) 2581 Mangler.getStream() << 'c'; 2582 2583 // Mangle the 'this' pointer adjustment. 2584 Mangler.mangleCallOffset(Thunk.This.NonVirtual, Thunk.This.VCallOffsetOffset); 2585 2586 // Mangle the return pointer adjustment if there is one. 2587 if (!Thunk.Return.isEmpty()) 2588 Mangler.mangleCallOffset(Thunk.Return.NonVirtual, 2589 Thunk.Return.VBaseOffsetOffset); 2590 2591 Mangler.mangleFunctionEncoding(MD); 2592} 2593 2594void 2595ItaniumMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD, 2596 CXXDtorType Type, 2597 const ThisAdjustment &ThisAdjustment, 2598 llvm::SmallVectorImpl<char> &Res) { 2599 // <special-name> ::= T <call-offset> <base encoding> 2600 // # base is the nominal target function of thunk 2601 2602 CXXNameMangler Mangler(*this, Res, DD, Type); 2603 Mangler.getStream() << "_ZT"; 2604 2605 // Mangle the 'this' pointer adjustment. 2606 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual, 2607 ThisAdjustment.VCallOffsetOffset); 2608 2609 Mangler.mangleFunctionEncoding(DD); 2610} 2611 2612/// mangleGuardVariable - Returns the mangled name for a guard variable 2613/// for the passed in VarDecl. 2614void ItaniumMangleContext::mangleItaniumGuardVariable(const VarDecl *D, 2615 llvm::SmallVectorImpl<char> &Res) { 2616 // <special-name> ::= GV <object name> # Guard variable for one-time 2617 // # initialization 2618 CXXNameMangler Mangler(*this, Res); 2619 Mangler.getStream() << "_ZGV"; 2620 Mangler.mangleName(D); 2621} 2622 2623void ItaniumMangleContext::mangleReferenceTemporary(const VarDecl *D, 2624 llvm::SmallVectorImpl<char> &Res) { 2625 // We match the GCC mangling here. 2626 // <special-name> ::= GR <object name> 2627 CXXNameMangler Mangler(*this, Res); 2628 Mangler.getStream() << "_ZGR"; 2629 Mangler.mangleName(D); 2630} 2631 2632void ItaniumMangleContext::mangleCXXVTable(const CXXRecordDecl *RD, 2633 llvm::SmallVectorImpl<char> &Res) { 2634 // <special-name> ::= TV <type> # virtual table 2635 CXXNameMangler Mangler(*this, Res); 2636 Mangler.getStream() << "_ZTV"; 2637 Mangler.mangleNameOrStandardSubstitution(RD); 2638} 2639 2640void ItaniumMangleContext::mangleCXXVTT(const CXXRecordDecl *RD, 2641 llvm::SmallVectorImpl<char> &Res) { 2642 // <special-name> ::= TT <type> # VTT structure 2643 CXXNameMangler Mangler(*this, Res); 2644 Mangler.getStream() << "_ZTT"; 2645 Mangler.mangleNameOrStandardSubstitution(RD); 2646} 2647 2648void ItaniumMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD, 2649 int64_t Offset, 2650 const CXXRecordDecl *Type, 2651 llvm::SmallVectorImpl<char> &Res) { 2652 // <special-name> ::= TC <type> <offset number> _ <base type> 2653 CXXNameMangler Mangler(*this, Res); 2654 Mangler.getStream() << "_ZTC"; 2655 Mangler.mangleNameOrStandardSubstitution(RD); 2656 Mangler.getStream() << Offset; 2657 Mangler.getStream() << '_'; 2658 Mangler.mangleNameOrStandardSubstitution(Type); 2659} 2660 2661void ItaniumMangleContext::mangleCXXRTTI(QualType Ty, 2662 llvm::SmallVectorImpl<char> &Res) { 2663 // <special-name> ::= TI <type> # typeinfo structure 2664 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers"); 2665 CXXNameMangler Mangler(*this, Res); 2666 Mangler.getStream() << "_ZTI"; 2667 Mangler.mangleType(Ty); 2668} 2669 2670void ItaniumMangleContext::mangleCXXRTTIName(QualType Ty, 2671 llvm::SmallVectorImpl<char> &Res) { 2672 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string) 2673 CXXNameMangler Mangler(*this, Res); 2674 Mangler.getStream() << "_ZTS"; 2675 Mangler.mangleType(Ty); 2676} 2677 2678MangleContext *clang::createItaniumMangleContext(ASTContext &Context, 2679 Diagnostic &Diags) { 2680 return new ItaniumMangleContext(Context, Diags); 2681} 2682