ItaniumMangle.cpp revision 56ca35d396d8692c384c785f9aeebcf22563fe1e
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 "clang/Basic/TargetInfo.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/raw_ostream.h" 29#include "llvm/Support/ErrorHandling.h" 30 31#define MANGLE_CHECKER 0 32 33#if MANGLE_CHECKER 34#include <cxxabi.h> 35#endif 36 37using namespace clang; 38 39namespace { 40 41static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) { 42 const DeclContext *DC = dyn_cast<DeclContext>(ND); 43 if (!DC) 44 DC = ND->getDeclContext(); 45 while (!DC->isNamespace() && !DC->isTranslationUnit()) { 46 if (isa<FunctionDecl>(DC->getParent())) 47 return dyn_cast<CXXRecordDecl>(DC); 48 DC = DC->getParent(); 49 } 50 return 0; 51} 52 53static const CXXMethodDecl *getStructor(const CXXMethodDecl *MD) { 54 assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) && 55 "Passed in decl is not a ctor or dtor!"); 56 57 if (const TemplateDecl *TD = MD->getPrimaryTemplate()) { 58 MD = cast<CXXMethodDecl>(TD->getTemplatedDecl()); 59 60 assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) && 61 "Templated decl is not a ctor or dtor!"); 62 } 63 64 return MD; 65} 66 67static const unsigned UnknownArity = ~0U; 68 69class ItaniumMangleContext : public MangleContext { 70 llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds; 71 unsigned Discriminator; 72 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier; 73 74public: 75 explicit ItaniumMangleContext(ASTContext &Context, 76 Diagnostic &Diags) 77 : MangleContext(Context, Diags) { } 78 79 uint64_t getAnonymousStructId(const TagDecl *TD) { 80 std::pair<llvm::DenseMap<const TagDecl *, 81 uint64_t>::iterator, bool> Result = 82 AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size())); 83 return Result.first->second; 84 } 85 86 void startNewFunction() { 87 MangleContext::startNewFunction(); 88 mangleInitDiscriminator(); 89 } 90 91 /// @name Mangler Entry Points 92 /// @{ 93 94 bool shouldMangleDeclName(const NamedDecl *D); 95 void mangleName(const NamedDecl *D, llvm::raw_ostream &); 96 void mangleThunk(const CXXMethodDecl *MD, 97 const ThunkInfo &Thunk, 98 llvm::raw_ostream &); 99 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, 100 const ThisAdjustment &ThisAdjustment, 101 llvm::raw_ostream &); 102 void mangleReferenceTemporary(const VarDecl *D, 103 llvm::raw_ostream &); 104 void mangleCXXVTable(const CXXRecordDecl *RD, 105 llvm::raw_ostream &); 106 void mangleCXXVTT(const CXXRecordDecl *RD, 107 llvm::raw_ostream &); 108 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset, 109 const CXXRecordDecl *Type, 110 llvm::raw_ostream &); 111 void mangleCXXRTTI(QualType T, llvm::raw_ostream &); 112 void mangleCXXRTTIName(QualType T, llvm::raw_ostream &); 113 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type, 114 llvm::raw_ostream &); 115 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type, 116 llvm::raw_ostream &); 117 118 void mangleItaniumGuardVariable(const VarDecl *D, llvm::raw_ostream &); 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_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::raw_ostream &Out_) 153 : Context(C), Out(Out_), Structor(0), StructorType(0), SeqID(0) { } 154 CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_, 155 const CXXConstructorDecl *D, CXXCtorType Type) 156 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 157 SeqID(0) { } 158 CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_, 159 const CXXDestructorDecl *D, CXXDtorType Type) 160 : Context(C), Out(Out_), 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_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. 332 333 // Adding the prefix can cause problems when one file has a "foo" and 334 // another has a "\01foo". That is known to happen on ELF with the 335 // tricks normally used for producing aliases (PR9177). Fortunately the 336 // llvm mangler on ELF is a nop, so we can just avoid adding the \01 337 // marker. 338 llvm::StringRef UserLabelPrefix = 339 getASTContext().Target.getUserLabelPrefix(); 340 if (!UserLabelPrefix.empty()) 341 Out << '\01'; // LLVM IR Marker for __asm("foo") 342 343 Out << ALA->getLabel(); 344 return; 345 } 346 347 // <mangled-name> ::= _Z <encoding> 348 // ::= <data name> 349 // ::= <special-name> 350 Out << Prefix; 351 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) 352 mangleFunctionEncoding(FD); 353 else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 354 mangleName(VD); 355 else 356 mangleName(cast<FieldDecl>(D)); 357} 358 359void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) { 360 // <encoding> ::= <function name> <bare-function-type> 361 mangleName(FD); 362 363 // Don't mangle in the type if this isn't a decl we should typically mangle. 364 if (!Context.shouldMangleDeclName(FD)) 365 return; 366 367 // Whether the mangling of a function type includes the return type depends on 368 // the context and the nature of the function. The rules for deciding whether 369 // the return type is included are: 370 // 371 // 1. Template functions (names or types) have return types encoded, with 372 // the exceptions listed below. 373 // 2. Function types not appearing as part of a function name mangling, 374 // e.g. parameters, pointer types, etc., have return type encoded, with the 375 // exceptions listed below. 376 // 3. Non-template function names do not have return types encoded. 377 // 378 // The exceptions mentioned in (1) and (2) above, for which the return type is 379 // never included, are 380 // 1. Constructors. 381 // 2. Destructors. 382 // 3. Conversion operator functions, e.g. operator int. 383 bool MangleReturnType = false; 384 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) { 385 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) || 386 isa<CXXConversionDecl>(FD))) 387 MangleReturnType = true; 388 389 // Mangle the type of the primary template. 390 FD = PrimaryTemplate->getTemplatedDecl(); 391 } 392 393 // Do the canonicalization out here because parameter types can 394 // undergo additional canonicalization (e.g. array decay). 395 const FunctionType *FT 396 = cast<FunctionType>(Context.getASTContext() 397 .getCanonicalType(FD->getType())); 398 399 mangleBareFunctionType(FT, MangleReturnType); 400} 401 402static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) { 403 while (isa<LinkageSpecDecl>(DC)) { 404 DC = DC->getParent(); 405 } 406 407 return DC; 408} 409 410/// isStd - Return whether a given namespace is the 'std' namespace. 411static bool isStd(const NamespaceDecl *NS) { 412 if (!IgnoreLinkageSpecDecls(NS->getParent())->isTranslationUnit()) 413 return false; 414 415 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier(); 416 return II && II->isStr("std"); 417} 418 419// isStdNamespace - Return whether a given decl context is a toplevel 'std' 420// namespace. 421static bool isStdNamespace(const DeclContext *DC) { 422 if (!DC->isNamespace()) 423 return false; 424 425 return isStd(cast<NamespaceDecl>(DC)); 426} 427 428static const TemplateDecl * 429isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) { 430 // Check if we have a function template. 431 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)){ 432 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) { 433 TemplateArgs = FD->getTemplateSpecializationArgs(); 434 return TD; 435 } 436 } 437 438 // Check if we have a class template. 439 if (const ClassTemplateSpecializationDecl *Spec = 440 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 441 TemplateArgs = &Spec->getTemplateArgs(); 442 return Spec->getSpecializedTemplate(); 443 } 444 445 return 0; 446} 447 448void CXXNameMangler::mangleName(const NamedDecl *ND) { 449 // <name> ::= <nested-name> 450 // ::= <unscoped-name> 451 // ::= <unscoped-template-name> <template-args> 452 // ::= <local-name> 453 // 454 const DeclContext *DC = ND->getDeclContext(); 455 456 // If this is an extern variable declared locally, the relevant DeclContext 457 // is that of the containing namespace, or the translation unit. 458 if (isa<FunctionDecl>(DC) && ND->hasLinkage()) 459 while (!DC->isNamespace() && !DC->isTranslationUnit()) 460 DC = DC->getParent(); 461 else if (GetLocalClassDecl(ND)) { 462 mangleLocalName(ND); 463 return; 464 } 465 466 while (isa<LinkageSpecDecl>(DC)) 467 DC = DC->getParent(); 468 469 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 470 // Check if we have a template. 471 const TemplateArgumentList *TemplateArgs = 0; 472 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 473 mangleUnscopedTemplateName(TD); 474 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 475 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 476 return; 477 } 478 479 mangleUnscopedName(ND); 480 return; 481 } 482 483 if (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)) { 484 mangleLocalName(ND); 485 return; 486 } 487 488 mangleNestedName(ND, DC); 489} 490void CXXNameMangler::mangleName(const TemplateDecl *TD, 491 const TemplateArgument *TemplateArgs, 492 unsigned NumTemplateArgs) { 493 const DeclContext *DC = IgnoreLinkageSpecDecls(TD->getDeclContext()); 494 495 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 496 mangleUnscopedTemplateName(TD); 497 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 498 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 499 } else { 500 mangleNestedName(TD, TemplateArgs, NumTemplateArgs); 501 } 502} 503 504void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND) { 505 // <unscoped-name> ::= <unqualified-name> 506 // ::= St <unqualified-name> # ::std:: 507 if (isStdNamespace(ND->getDeclContext())) 508 Out << "St"; 509 510 mangleUnqualifiedName(ND); 511} 512 513void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) { 514 // <unscoped-template-name> ::= <unscoped-name> 515 // ::= <substitution> 516 if (mangleSubstitution(ND)) 517 return; 518 519 // <template-template-param> ::= <template-param> 520 if (const TemplateTemplateParmDecl *TTP 521 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 522 mangleTemplateParameter(TTP->getIndex()); 523 return; 524 } 525 526 mangleUnscopedName(ND->getTemplatedDecl()); 527 addSubstitution(ND); 528} 529 530void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) { 531 // <unscoped-template-name> ::= <unscoped-name> 532 // ::= <substitution> 533 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 534 return mangleUnscopedTemplateName(TD); 535 536 if (mangleSubstitution(Template)) 537 return; 538 539 // FIXME: How to cope with operators here? 540 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 541 assert(Dependent && "Not a dependent template name?"); 542 if (!Dependent->isIdentifier()) { 543 // FIXME: We can't possibly know the arity of the operator here! 544 Diagnostic &Diags = Context.getDiags(); 545 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 546 "cannot mangle dependent operator name"); 547 Diags.Report(DiagID); 548 return; 549 } 550 551 mangleSourceName(Dependent->getIdentifier()); 552 addSubstitution(Template); 553} 554 555void CXXNameMangler::mangleFloat(const llvm::APFloat &F) { 556 // TODO: avoid this copy with careful stream management. 557 llvm::SmallString<20> Buffer; 558 F.bitcastToAPInt().toString(Buffer, 16, false); 559 Out.write(Buffer.data(), Buffer.size()); 560} 561 562void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) { 563 if (Value.isSigned() && Value.isNegative()) { 564 Out << 'n'; 565 Value.abs().print(Out, true); 566 } else 567 Value.print(Out, Value.isSigned()); 568} 569 570void CXXNameMangler::mangleNumber(int64_t Number) { 571 // <number> ::= [n] <non-negative decimal integer> 572 if (Number < 0) { 573 Out << 'n'; 574 Number = -Number; 575 } 576 577 Out << Number; 578} 579 580void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) { 581 // <call-offset> ::= h <nv-offset> _ 582 // ::= v <v-offset> _ 583 // <nv-offset> ::= <offset number> # non-virtual base override 584 // <v-offset> ::= <offset number> _ <virtual offset number> 585 // # virtual base override, with vcall offset 586 if (!Virtual) { 587 Out << 'h'; 588 mangleNumber(NonVirtual); 589 Out << '_'; 590 return; 591 } 592 593 Out << 'v'; 594 mangleNumber(NonVirtual); 595 Out << '_'; 596 mangleNumber(Virtual); 597 Out << '_'; 598} 599 600void CXXNameMangler::mangleUnresolvedScope(NestedNameSpecifier *Qualifier) { 601 Qualifier = getASTContext().getCanonicalNestedNameSpecifier(Qualifier); 602 switch (Qualifier->getKind()) { 603 case NestedNameSpecifier::Global: 604 // nothing 605 break; 606 case NestedNameSpecifier::Namespace: 607 mangleName(Qualifier->getAsNamespace()); 608 break; 609 case NestedNameSpecifier::TypeSpec: 610 case NestedNameSpecifier::TypeSpecWithTemplate: { 611 const Type *QTy = Qualifier->getAsType(); 612 613 if (const TemplateSpecializationType *TST = 614 dyn_cast<TemplateSpecializationType>(QTy)) { 615 if (!mangleSubstitution(QualType(TST, 0))) { 616 mangleTemplatePrefix(TST->getTemplateName()); 617 618 // FIXME: GCC does not appear to mangle the template arguments when 619 // the template in question is a dependent template name. Should we 620 // emulate that badness? 621 mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(), 622 TST->getNumArgs()); 623 addSubstitution(QualType(TST, 0)); 624 } 625 } else { 626 // We use the QualType mangle type variant here because it handles 627 // substitutions. 628 mangleType(QualType(QTy, 0)); 629 } 630 } 631 break; 632 case NestedNameSpecifier::Identifier: 633 // Member expressions can have these without prefixes. 634 if (Qualifier->getPrefix()) 635 mangleUnresolvedScope(Qualifier->getPrefix()); 636 mangleSourceName(Qualifier->getAsIdentifier()); 637 break; 638 } 639} 640 641/// Mangles a name which was not resolved to a specific entity. 642void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *Qualifier, 643 DeclarationName Name, 644 unsigned KnownArity) { 645 if (Qualifier) 646 mangleUnresolvedScope(Qualifier); 647 // FIXME: ambiguity of unqualified lookup with :: 648 649 mangleUnqualifiedName(0, Name, KnownArity); 650} 651 652static const FieldDecl *FindFirstNamedDataMember(const RecordDecl *RD) { 653 assert(RD->isAnonymousStructOrUnion() && 654 "Expected anonymous struct or union!"); 655 656 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 657 I != E; ++I) { 658 const FieldDecl *FD = *I; 659 660 if (FD->getIdentifier()) 661 return FD; 662 663 if (const RecordType *RT = FD->getType()->getAs<RecordType>()) { 664 if (const FieldDecl *NamedDataMember = 665 FindFirstNamedDataMember(RT->getDecl())) 666 return NamedDataMember; 667 } 668 } 669 670 // We didn't find a named data member. 671 return 0; 672} 673 674void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND, 675 DeclarationName Name, 676 unsigned KnownArity) { 677 // <unqualified-name> ::= <operator-name> 678 // ::= <ctor-dtor-name> 679 // ::= <source-name> 680 switch (Name.getNameKind()) { 681 case DeclarationName::Identifier: { 682 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) { 683 // We must avoid conflicts between internally- and externally- 684 // linked variable declaration names in the same TU. 685 // This naming convention is the same as that followed by GCC, though it 686 // shouldn't actually matter. 687 if (ND && isa<VarDecl>(ND) && ND->getLinkage() == InternalLinkage && 688 ND->getDeclContext()->isFileContext()) 689 Out << 'L'; 690 691 mangleSourceName(II); 692 break; 693 } 694 695 // Otherwise, an anonymous entity. We must have a declaration. 696 assert(ND && "mangling empty name without declaration"); 697 698 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 699 if (NS->isAnonymousNamespace()) { 700 // This is how gcc mangles these names. 701 Out << "12_GLOBAL__N_1"; 702 break; 703 } 704 } 705 706 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { 707 // We must have an anonymous union or struct declaration. 708 const RecordDecl *RD = 709 cast<RecordDecl>(VD->getType()->getAs<RecordType>()->getDecl()); 710 711 // Itanium C++ ABI 5.1.2: 712 // 713 // For the purposes of mangling, the name of an anonymous union is 714 // considered to be the name of the first named data member found by a 715 // pre-order, depth-first, declaration-order walk of the data members of 716 // the anonymous union. If there is no such data member (i.e., if all of 717 // the data members in the union are unnamed), then there is no way for 718 // a program to refer to the anonymous union, and there is therefore no 719 // need to mangle its name. 720 const FieldDecl *FD = FindFirstNamedDataMember(RD); 721 722 // It's actually possible for various reasons for us to get here 723 // with an empty anonymous struct / union. Fortunately, it 724 // doesn't really matter what name we generate. 725 if (!FD) break; 726 assert(FD->getIdentifier() && "Data member name isn't an identifier!"); 727 728 mangleSourceName(FD->getIdentifier()); 729 break; 730 } 731 732 // We must have an anonymous struct. 733 const TagDecl *TD = cast<TagDecl>(ND); 734 if (const TypedefDecl *D = TD->getTypedefForAnonDecl()) { 735 assert(TD->getDeclContext() == D->getDeclContext() && 736 "Typedef should not be in another decl context!"); 737 assert(D->getDeclName().getAsIdentifierInfo() && 738 "Typedef was not named!"); 739 mangleSourceName(D->getDeclName().getAsIdentifierInfo()); 740 break; 741 } 742 743 // Get a unique id for the anonymous struct. 744 uint64_t AnonStructId = Context.getAnonymousStructId(TD); 745 746 // Mangle it as a source name in the form 747 // [n] $_<id> 748 // where n is the length of the string. 749 llvm::SmallString<8> Str; 750 Str += "$_"; 751 Str += llvm::utostr(AnonStructId); 752 753 Out << Str.size(); 754 Out << Str.str(); 755 break; 756 } 757 758 case DeclarationName::ObjCZeroArgSelector: 759 case DeclarationName::ObjCOneArgSelector: 760 case DeclarationName::ObjCMultiArgSelector: 761 assert(false && "Can't mangle Objective-C selector names here!"); 762 break; 763 764 case DeclarationName::CXXConstructorName: 765 if (ND == Structor) 766 // If the named decl is the C++ constructor we're mangling, use the type 767 // we were given. 768 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType)); 769 else 770 // Otherwise, use the complete constructor name. This is relevant if a 771 // class with a constructor is declared within a constructor. 772 mangleCXXCtorType(Ctor_Complete); 773 break; 774 775 case DeclarationName::CXXDestructorName: 776 if (ND == Structor) 777 // If the named decl is the C++ destructor we're mangling, use the type we 778 // were given. 779 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType)); 780 else 781 // Otherwise, use the complete destructor name. This is relevant if a 782 // class with a destructor is declared within a destructor. 783 mangleCXXDtorType(Dtor_Complete); 784 break; 785 786 case DeclarationName::CXXConversionFunctionName: 787 // <operator-name> ::= cv <type> # (cast) 788 Out << "cv"; 789 mangleType(Context.getASTContext().getCanonicalType(Name.getCXXNameType())); 790 break; 791 792 case DeclarationName::CXXOperatorName: { 793 unsigned Arity; 794 if (ND) { 795 Arity = cast<FunctionDecl>(ND)->getNumParams(); 796 797 // If we have a C++ member function, we need to include the 'this' pointer. 798 // FIXME: This does not make sense for operators that are static, but their 799 // names stay the same regardless of the arity (operator new for instance). 800 if (isa<CXXMethodDecl>(ND)) 801 Arity++; 802 } else 803 Arity = KnownArity; 804 805 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity); 806 break; 807 } 808 809 case DeclarationName::CXXLiteralOperatorName: 810 // FIXME: This mangling is not yet official. 811 Out << "li"; 812 mangleSourceName(Name.getCXXLiteralIdentifier()); 813 break; 814 815 case DeclarationName::CXXUsingDirective: 816 assert(false && "Can't mangle a using directive name!"); 817 break; 818 } 819} 820 821void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) { 822 // <source-name> ::= <positive length number> <identifier> 823 // <number> ::= [n] <non-negative decimal integer> 824 // <identifier> ::= <unqualified source code identifier> 825 Out << II->getLength() << II->getName(); 826} 827 828void CXXNameMangler::mangleNestedName(const NamedDecl *ND, 829 const DeclContext *DC, 830 bool NoFunction) { 831 // <nested-name> 832 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E 833 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix> 834 // <template-args> E 835 836 Out << 'N'; 837 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) { 838 mangleQualifiers(Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 839 mangleRefQualifier(Method->getRefQualifier()); 840 } 841 842 // Check if we have a template. 843 const TemplateArgumentList *TemplateArgs = 0; 844 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 845 mangleTemplatePrefix(TD); 846 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 847 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 848 } 849 else { 850 manglePrefix(DC, NoFunction); 851 mangleUnqualifiedName(ND); 852 } 853 854 Out << 'E'; 855} 856void CXXNameMangler::mangleNestedName(const TemplateDecl *TD, 857 const TemplateArgument *TemplateArgs, 858 unsigned NumTemplateArgs) { 859 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E 860 861 Out << 'N'; 862 863 mangleTemplatePrefix(TD); 864 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 865 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 866 867 Out << 'E'; 868} 869 870void CXXNameMangler::mangleLocalName(const NamedDecl *ND) { 871 // <local-name> := Z <function encoding> E <entity name> [<discriminator>] 872 // := Z <function encoding> E s [<discriminator>] 873 // <discriminator> := _ <non-negative number> 874 const DeclContext *DC = ND->getDeclContext(); 875 Out << 'Z'; 876 877 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC)) { 878 mangleObjCMethodName(MD); 879 } else if (const CXXRecordDecl *RD = GetLocalClassDecl(ND)) { 880 mangleFunctionEncoding(cast<FunctionDecl>(RD->getDeclContext())); 881 Out << 'E'; 882 883 // Mangle the name relative to the closest enclosing function. 884 if (ND == RD) // equality ok because RD derived from ND above 885 mangleUnqualifiedName(ND); 886 else 887 mangleNestedName(ND, DC, true /*NoFunction*/); 888 889 unsigned disc; 890 if (Context.getNextDiscriminator(RD, disc)) { 891 if (disc < 10) 892 Out << '_' << disc; 893 else 894 Out << "__" << disc << '_'; 895 } 896 897 return; 898 } 899 else 900 mangleFunctionEncoding(cast<FunctionDecl>(DC)); 901 902 Out << 'E'; 903 mangleUnqualifiedName(ND); 904} 905 906void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) { 907 // <prefix> ::= <prefix> <unqualified-name> 908 // ::= <template-prefix> <template-args> 909 // ::= <template-param> 910 // ::= # empty 911 // ::= <substitution> 912 913 while (isa<LinkageSpecDecl>(DC)) 914 DC = DC->getParent(); 915 916 if (DC->isTranslationUnit()) 917 return; 918 919 if (const BlockDecl *Block = dyn_cast<BlockDecl>(DC)) { 920 manglePrefix(DC->getParent(), NoFunction); 921 llvm::SmallString<64> Name; 922 llvm::raw_svector_ostream NameStream(Name); 923 Context.mangleBlock(Block, NameStream); 924 NameStream.flush(); 925 Out << Name.size() << Name; 926 return; 927 } 928 929 if (mangleSubstitution(cast<NamedDecl>(DC))) 930 return; 931 932 // Check if we have a template. 933 const TemplateArgumentList *TemplateArgs = 0; 934 if (const TemplateDecl *TD = isTemplate(cast<NamedDecl>(DC), TemplateArgs)) { 935 mangleTemplatePrefix(TD); 936 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 937 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 938 } 939 else if(NoFunction && (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC))) 940 return; 941 else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) 942 mangleObjCMethodName(Method); 943 else { 944 manglePrefix(DC->getParent(), NoFunction); 945 mangleUnqualifiedName(cast<NamedDecl>(DC)); 946 } 947 948 addSubstitution(cast<NamedDecl>(DC)); 949} 950 951void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) { 952 // <template-prefix> ::= <prefix> <template unqualified-name> 953 // ::= <template-param> 954 // ::= <substitution> 955 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 956 return mangleTemplatePrefix(TD); 957 958 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName()) 959 mangleUnresolvedScope(Qualified->getQualifier()); 960 961 if (OverloadedTemplateStorage *Overloaded 962 = Template.getAsOverloadedTemplate()) { 963 mangleUnqualifiedName(0, (*Overloaded->begin())->getDeclName(), 964 UnknownArity); 965 return; 966 } 967 968 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 969 assert(Dependent && "Unknown template name kind?"); 970 mangleUnresolvedScope(Dependent->getQualifier()); 971 mangleUnscopedTemplateName(Template); 972} 973 974void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) { 975 // <template-prefix> ::= <prefix> <template unqualified-name> 976 // ::= <template-param> 977 // ::= <substitution> 978 // <template-template-param> ::= <template-param> 979 // <substitution> 980 981 if (mangleSubstitution(ND)) 982 return; 983 984 // <template-template-param> ::= <template-param> 985 if (const TemplateTemplateParmDecl *TTP 986 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 987 mangleTemplateParameter(TTP->getIndex()); 988 return; 989 } 990 991 manglePrefix(ND->getDeclContext()); 992 mangleUnqualifiedName(ND->getTemplatedDecl()); 993 addSubstitution(ND); 994} 995 996/// Mangles a template name under the production <type>. Required for 997/// template template arguments. 998/// <type> ::= <class-enum-type> 999/// ::= <template-param> 1000/// ::= <substitution> 1001void CXXNameMangler::mangleType(TemplateName TN) { 1002 if (mangleSubstitution(TN)) 1003 return; 1004 1005 TemplateDecl *TD = 0; 1006 1007 switch (TN.getKind()) { 1008 case TemplateName::QualifiedTemplate: 1009 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl(); 1010 goto HaveDecl; 1011 1012 case TemplateName::Template: 1013 TD = TN.getAsTemplateDecl(); 1014 goto HaveDecl; 1015 1016 HaveDecl: 1017 if (isa<TemplateTemplateParmDecl>(TD)) 1018 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex()); 1019 else 1020 mangleName(TD); 1021 break; 1022 1023 case TemplateName::OverloadedTemplate: 1024 llvm_unreachable("can't mangle an overloaded template name as a <type>"); 1025 break; 1026 1027 case TemplateName::DependentTemplate: { 1028 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName(); 1029 assert(Dependent->isIdentifier()); 1030 1031 // <class-enum-type> ::= <name> 1032 // <name> ::= <nested-name> 1033 mangleUnresolvedScope(Dependent->getQualifier()); 1034 mangleSourceName(Dependent->getIdentifier()); 1035 break; 1036 } 1037 1038 case TemplateName::SubstTemplateTemplateParmPack: { 1039 SubstTemplateTemplateParmPackStorage *SubstPack 1040 = TN.getAsSubstTemplateTemplateParmPack(); 1041 mangleTemplateParameter(SubstPack->getParameterPack()->getIndex()); 1042 break; 1043 } 1044 } 1045 1046 addSubstitution(TN); 1047} 1048 1049void 1050CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) { 1051 switch (OO) { 1052 // <operator-name> ::= nw # new 1053 case OO_New: Out << "nw"; break; 1054 // ::= na # new[] 1055 case OO_Array_New: Out << "na"; break; 1056 // ::= dl # delete 1057 case OO_Delete: Out << "dl"; break; 1058 // ::= da # delete[] 1059 case OO_Array_Delete: Out << "da"; break; 1060 // ::= ps # + (unary) 1061 // ::= pl # + (binary or unknown) 1062 case OO_Plus: 1063 Out << (Arity == 1? "ps" : "pl"); break; 1064 // ::= ng # - (unary) 1065 // ::= mi # - (binary or unknown) 1066 case OO_Minus: 1067 Out << (Arity == 1? "ng" : "mi"); break; 1068 // ::= ad # & (unary) 1069 // ::= an # & (binary or unknown) 1070 case OO_Amp: 1071 Out << (Arity == 1? "ad" : "an"); break; 1072 // ::= de # * (unary) 1073 // ::= ml # * (binary or unknown) 1074 case OO_Star: 1075 // Use binary when unknown. 1076 Out << (Arity == 1? "de" : "ml"); break; 1077 // ::= co # ~ 1078 case OO_Tilde: Out << "co"; break; 1079 // ::= dv # / 1080 case OO_Slash: Out << "dv"; break; 1081 // ::= rm # % 1082 case OO_Percent: Out << "rm"; break; 1083 // ::= or # | 1084 case OO_Pipe: Out << "or"; break; 1085 // ::= eo # ^ 1086 case OO_Caret: Out << "eo"; break; 1087 // ::= aS # = 1088 case OO_Equal: Out << "aS"; break; 1089 // ::= pL # += 1090 case OO_PlusEqual: Out << "pL"; break; 1091 // ::= mI # -= 1092 case OO_MinusEqual: Out << "mI"; break; 1093 // ::= mL # *= 1094 case OO_StarEqual: Out << "mL"; break; 1095 // ::= dV # /= 1096 case OO_SlashEqual: Out << "dV"; break; 1097 // ::= rM # %= 1098 case OO_PercentEqual: Out << "rM"; break; 1099 // ::= aN # &= 1100 case OO_AmpEqual: Out << "aN"; break; 1101 // ::= oR # |= 1102 case OO_PipeEqual: Out << "oR"; break; 1103 // ::= eO # ^= 1104 case OO_CaretEqual: Out << "eO"; break; 1105 // ::= ls # << 1106 case OO_LessLess: Out << "ls"; break; 1107 // ::= rs # >> 1108 case OO_GreaterGreater: Out << "rs"; break; 1109 // ::= lS # <<= 1110 case OO_LessLessEqual: Out << "lS"; break; 1111 // ::= rS # >>= 1112 case OO_GreaterGreaterEqual: Out << "rS"; break; 1113 // ::= eq # == 1114 case OO_EqualEqual: Out << "eq"; break; 1115 // ::= ne # != 1116 case OO_ExclaimEqual: Out << "ne"; break; 1117 // ::= lt # < 1118 case OO_Less: Out << "lt"; break; 1119 // ::= gt # > 1120 case OO_Greater: Out << "gt"; break; 1121 // ::= le # <= 1122 case OO_LessEqual: Out << "le"; break; 1123 // ::= ge # >= 1124 case OO_GreaterEqual: Out << "ge"; break; 1125 // ::= nt # ! 1126 case OO_Exclaim: Out << "nt"; break; 1127 // ::= aa # && 1128 case OO_AmpAmp: Out << "aa"; break; 1129 // ::= oo # || 1130 case OO_PipePipe: Out << "oo"; break; 1131 // ::= pp # ++ 1132 case OO_PlusPlus: Out << "pp"; break; 1133 // ::= mm # -- 1134 case OO_MinusMinus: Out << "mm"; break; 1135 // ::= cm # , 1136 case OO_Comma: Out << "cm"; break; 1137 // ::= pm # ->* 1138 case OO_ArrowStar: Out << "pm"; break; 1139 // ::= pt # -> 1140 case OO_Arrow: Out << "pt"; break; 1141 // ::= cl # () 1142 case OO_Call: Out << "cl"; break; 1143 // ::= ix # [] 1144 case OO_Subscript: Out << "ix"; break; 1145 1146 // ::= qu # ? 1147 // The conditional operator can't be overloaded, but we still handle it when 1148 // mangling expressions. 1149 case OO_Conditional: Out << "qu"; break; 1150 1151 case OO_None: 1152 case NUM_OVERLOADED_OPERATORS: 1153 assert(false && "Not an overloaded operator"); 1154 break; 1155 } 1156} 1157 1158void CXXNameMangler::mangleQualifiers(Qualifiers Quals) { 1159 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const 1160 if (Quals.hasRestrict()) 1161 Out << 'r'; 1162 if (Quals.hasVolatile()) 1163 Out << 'V'; 1164 if (Quals.hasConst()) 1165 Out << 'K'; 1166 1167 if (Quals.hasAddressSpace()) { 1168 // Extension: 1169 // 1170 // <type> ::= U <address-space-number> 1171 // 1172 // where <address-space-number> is a source name consisting of 'AS' 1173 // followed by the address space <number>. 1174 llvm::SmallString<64> ASString; 1175 ASString = "AS" + llvm::utostr_32(Quals.getAddressSpace()); 1176 Out << 'U' << ASString.size() << ASString; 1177 } 1178 1179 // FIXME: For now, just drop all extension qualifiers on the floor. 1180} 1181 1182void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) { 1183 // <ref-qualifier> ::= R # lvalue reference 1184 // ::= O # rvalue-reference 1185 // Proposal to Itanium C++ ABI list on 1/26/11 1186 switch (RefQualifier) { 1187 case RQ_None: 1188 break; 1189 1190 case RQ_LValue: 1191 Out << 'R'; 1192 break; 1193 1194 case RQ_RValue: 1195 Out << 'O'; 1196 break; 1197 } 1198} 1199 1200void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) { 1201 Context.mangleObjCMethodName(MD, Out); 1202} 1203 1204void CXXNameMangler::mangleType(QualType nonCanon) { 1205 // Only operate on the canonical type! 1206 QualType canon = nonCanon.getCanonicalType(); 1207 1208 SplitQualType split = canon.split(); 1209 Qualifiers quals = split.second; 1210 const Type *ty = split.first; 1211 1212 bool isSubstitutable = quals || !isa<BuiltinType>(ty); 1213 if (isSubstitutable && mangleSubstitution(canon)) 1214 return; 1215 1216 // If we're mangling a qualified array type, push the qualifiers to 1217 // the element type. 1218 if (quals && isa<ArrayType>(ty)) { 1219 ty = Context.getASTContext().getAsArrayType(canon); 1220 quals = Qualifiers(); 1221 1222 // Note that we don't update canon: we want to add the 1223 // substitution at the canonical type. 1224 } 1225 1226 if (quals) { 1227 mangleQualifiers(quals); 1228 // Recurse: even if the qualified type isn't yet substitutable, 1229 // the unqualified type might be. 1230 mangleType(QualType(ty, 0)); 1231 } else { 1232 switch (ty->getTypeClass()) { 1233#define ABSTRACT_TYPE(CLASS, PARENT) 1234#define NON_CANONICAL_TYPE(CLASS, PARENT) \ 1235 case Type::CLASS: \ 1236 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \ 1237 return; 1238#define TYPE(CLASS, PARENT) \ 1239 case Type::CLASS: \ 1240 mangleType(static_cast<const CLASS##Type*>(ty)); \ 1241 break; 1242#include "clang/AST/TypeNodes.def" 1243 } 1244 } 1245 1246 // Add the substitution. 1247 if (isSubstitutable) 1248 addSubstitution(canon); 1249} 1250 1251void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) { 1252 if (!mangleStandardSubstitution(ND)) 1253 mangleName(ND); 1254} 1255 1256void CXXNameMangler::mangleType(const BuiltinType *T) { 1257 // <type> ::= <builtin-type> 1258 // <builtin-type> ::= v # void 1259 // ::= w # wchar_t 1260 // ::= b # bool 1261 // ::= c # char 1262 // ::= a # signed char 1263 // ::= h # unsigned char 1264 // ::= s # short 1265 // ::= t # unsigned short 1266 // ::= i # int 1267 // ::= j # unsigned int 1268 // ::= l # long 1269 // ::= m # unsigned long 1270 // ::= x # long long, __int64 1271 // ::= y # unsigned long long, __int64 1272 // ::= n # __int128 1273 // UNSUPPORTED: ::= o # unsigned __int128 1274 // ::= f # float 1275 // ::= d # double 1276 // ::= e # long double, __float80 1277 // UNSUPPORTED: ::= g # __float128 1278 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits) 1279 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits) 1280 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits) 1281 // UNSUPPORTED: ::= Dh # IEEE 754r half-precision floating point (16 bits) 1282 // ::= Di # char32_t 1283 // ::= Ds # char16_t 1284 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) 1285 // ::= u <source-name> # vendor extended type 1286 switch (T->getKind()) { 1287 case BuiltinType::Void: Out << 'v'; break; 1288 case BuiltinType::Bool: Out << 'b'; break; 1289 case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'c'; break; 1290 case BuiltinType::UChar: Out << 'h'; break; 1291 case BuiltinType::UShort: Out << 't'; break; 1292 case BuiltinType::UInt: Out << 'j'; break; 1293 case BuiltinType::ULong: Out << 'm'; break; 1294 case BuiltinType::ULongLong: Out << 'y'; break; 1295 case BuiltinType::UInt128: Out << 'o'; break; 1296 case BuiltinType::SChar: Out << 'a'; break; 1297 case BuiltinType::WChar_S: 1298 case BuiltinType::WChar_U: Out << 'w'; break; 1299 case BuiltinType::Char16: Out << "Ds"; break; 1300 case BuiltinType::Char32: Out << "Di"; break; 1301 case BuiltinType::Short: Out << 's'; break; 1302 case BuiltinType::Int: Out << 'i'; break; 1303 case BuiltinType::Long: Out << 'l'; break; 1304 case BuiltinType::LongLong: Out << 'x'; break; 1305 case BuiltinType::Int128: Out << 'n'; break; 1306 case BuiltinType::Float: Out << 'f'; break; 1307 case BuiltinType::Double: Out << 'd'; break; 1308 case BuiltinType::LongDouble: Out << 'e'; break; 1309 case BuiltinType::NullPtr: Out << "Dn"; break; 1310 1311 case BuiltinType::Overload: 1312 case BuiltinType::Dependent: 1313 assert(false && 1314 "Overloaded and dependent types shouldn't get to name mangling"); 1315 break; 1316 case BuiltinType::UndeducedAuto: 1317 assert(0 && "Should not see undeduced auto here"); 1318 break; 1319 case BuiltinType::ObjCId: Out << "11objc_object"; break; 1320 case BuiltinType::ObjCClass: Out << "10objc_class"; break; 1321 case BuiltinType::ObjCSel: Out << "13objc_selector"; break; 1322 } 1323} 1324 1325// <type> ::= <function-type> 1326// <function-type> ::= F [Y] <bare-function-type> E 1327void CXXNameMangler::mangleType(const FunctionProtoType *T) { 1328 Out << 'F'; 1329 // FIXME: We don't have enough information in the AST to produce the 'Y' 1330 // encoding for extern "C" function types. 1331 mangleBareFunctionType(T, /*MangleReturnType=*/true); 1332 Out << 'E'; 1333} 1334void CXXNameMangler::mangleType(const FunctionNoProtoType *T) { 1335 llvm_unreachable("Can't mangle K&R function prototypes"); 1336} 1337void CXXNameMangler::mangleBareFunctionType(const FunctionType *T, 1338 bool MangleReturnType) { 1339 // We should never be mangling something without a prototype. 1340 const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 1341 1342 // <bare-function-type> ::= <signature type>+ 1343 if (MangleReturnType) 1344 mangleType(Proto->getResultType()); 1345 1346 if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) { 1347 // <builtin-type> ::= v # void 1348 Out << 'v'; 1349 return; 1350 } 1351 1352 for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(), 1353 ArgEnd = Proto->arg_type_end(); 1354 Arg != ArgEnd; ++Arg) 1355 mangleType(*Arg); 1356 1357 // <builtin-type> ::= z # ellipsis 1358 if (Proto->isVariadic()) 1359 Out << 'z'; 1360} 1361 1362// <type> ::= <class-enum-type> 1363// <class-enum-type> ::= <name> 1364void CXXNameMangler::mangleType(const UnresolvedUsingType *T) { 1365 mangleName(T->getDecl()); 1366} 1367 1368// <type> ::= <class-enum-type> 1369// <class-enum-type> ::= <name> 1370void CXXNameMangler::mangleType(const EnumType *T) { 1371 mangleType(static_cast<const TagType*>(T)); 1372} 1373void CXXNameMangler::mangleType(const RecordType *T) { 1374 mangleType(static_cast<const TagType*>(T)); 1375} 1376void CXXNameMangler::mangleType(const TagType *T) { 1377 mangleName(T->getDecl()); 1378} 1379 1380// <type> ::= <array-type> 1381// <array-type> ::= A <positive dimension number> _ <element type> 1382// ::= A [<dimension expression>] _ <element type> 1383void CXXNameMangler::mangleType(const ConstantArrayType *T) { 1384 Out << 'A' << T->getSize() << '_'; 1385 mangleType(T->getElementType()); 1386} 1387void CXXNameMangler::mangleType(const VariableArrayType *T) { 1388 Out << 'A'; 1389 // decayed vla types (size 0) will just be skipped. 1390 if (T->getSizeExpr()) 1391 mangleExpression(T->getSizeExpr()); 1392 Out << '_'; 1393 mangleType(T->getElementType()); 1394} 1395void CXXNameMangler::mangleType(const DependentSizedArrayType *T) { 1396 Out << 'A'; 1397 mangleExpression(T->getSizeExpr()); 1398 Out << '_'; 1399 mangleType(T->getElementType()); 1400} 1401void CXXNameMangler::mangleType(const IncompleteArrayType *T) { 1402 Out << "A_"; 1403 mangleType(T->getElementType()); 1404} 1405 1406// <type> ::= <pointer-to-member-type> 1407// <pointer-to-member-type> ::= M <class type> <member type> 1408void CXXNameMangler::mangleType(const MemberPointerType *T) { 1409 Out << 'M'; 1410 mangleType(QualType(T->getClass(), 0)); 1411 QualType PointeeType = T->getPointeeType(); 1412 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) { 1413 mangleQualifiers(Qualifiers::fromCVRMask(FPT->getTypeQuals())); 1414 mangleRefQualifier(FPT->getRefQualifier()); 1415 mangleType(FPT); 1416 1417 // Itanium C++ ABI 5.1.8: 1418 // 1419 // The type of a non-static member function is considered to be different, 1420 // for the purposes of substitution, from the type of a namespace-scope or 1421 // static member function whose type appears similar. The types of two 1422 // non-static member functions are considered to be different, for the 1423 // purposes of substitution, if the functions are members of different 1424 // classes. In other words, for the purposes of substitution, the class of 1425 // which the function is a member is considered part of the type of 1426 // function. 1427 1428 // We increment the SeqID here to emulate adding an entry to the 1429 // substitution table. We can't actually add it because we don't want this 1430 // particular function type to be substituted. 1431 ++SeqID; 1432 } else 1433 mangleType(PointeeType); 1434} 1435 1436// <type> ::= <template-param> 1437void CXXNameMangler::mangleType(const TemplateTypeParmType *T) { 1438 mangleTemplateParameter(T->getIndex()); 1439} 1440 1441// <type> ::= <template-param> 1442void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) { 1443 mangleTemplateParameter(T->getReplacedParameter()->getIndex()); 1444} 1445 1446// <type> ::= P <type> # pointer-to 1447void CXXNameMangler::mangleType(const PointerType *T) { 1448 Out << 'P'; 1449 mangleType(T->getPointeeType()); 1450} 1451void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) { 1452 Out << 'P'; 1453 mangleType(T->getPointeeType()); 1454} 1455 1456// <type> ::= R <type> # reference-to 1457void CXXNameMangler::mangleType(const LValueReferenceType *T) { 1458 Out << 'R'; 1459 mangleType(T->getPointeeType()); 1460} 1461 1462// <type> ::= O <type> # rvalue reference-to (C++0x) 1463void CXXNameMangler::mangleType(const RValueReferenceType *T) { 1464 Out << 'O'; 1465 mangleType(T->getPointeeType()); 1466} 1467 1468// <type> ::= C <type> # complex pair (C 2000) 1469void CXXNameMangler::mangleType(const ComplexType *T) { 1470 Out << 'C'; 1471 mangleType(T->getElementType()); 1472} 1473 1474// ARM's ABI for Neon vector types specifies that they should be mangled as 1475// if they are structs (to match ARM's initial implementation). The 1476// vector type must be one of the special types predefined by ARM. 1477void CXXNameMangler::mangleNeonVectorType(const VectorType *T) { 1478 QualType EltType = T->getElementType(); 1479 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType"); 1480 const char *EltName = 0; 1481 if (T->getVectorKind() == VectorType::NeonPolyVector) { 1482 switch (cast<BuiltinType>(EltType)->getKind()) { 1483 case BuiltinType::SChar: EltName = "poly8_t"; break; 1484 case BuiltinType::Short: EltName = "poly16_t"; break; 1485 default: llvm_unreachable("unexpected Neon polynomial vector element type"); 1486 } 1487 } else { 1488 switch (cast<BuiltinType>(EltType)->getKind()) { 1489 case BuiltinType::SChar: EltName = "int8_t"; break; 1490 case BuiltinType::UChar: EltName = "uint8_t"; break; 1491 case BuiltinType::Short: EltName = "int16_t"; break; 1492 case BuiltinType::UShort: EltName = "uint16_t"; break; 1493 case BuiltinType::Int: EltName = "int32_t"; break; 1494 case BuiltinType::UInt: EltName = "uint32_t"; break; 1495 case BuiltinType::LongLong: EltName = "int64_t"; break; 1496 case BuiltinType::ULongLong: EltName = "uint64_t"; break; 1497 case BuiltinType::Float: EltName = "float32_t"; break; 1498 default: llvm_unreachable("unexpected Neon vector element type"); 1499 } 1500 } 1501 const char *BaseName = 0; 1502 unsigned BitSize = (T->getNumElements() * 1503 getASTContext().getTypeSize(EltType)); 1504 if (BitSize == 64) 1505 BaseName = "__simd64_"; 1506 else { 1507 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits"); 1508 BaseName = "__simd128_"; 1509 } 1510 Out << strlen(BaseName) + strlen(EltName); 1511 Out << BaseName << EltName; 1512} 1513 1514// GNU extension: vector types 1515// <type> ::= <vector-type> 1516// <vector-type> ::= Dv <positive dimension number> _ 1517// <extended element type> 1518// ::= Dv [<dimension expression>] _ <element type> 1519// <extended element type> ::= <element type> 1520// ::= p # AltiVec vector pixel 1521void CXXNameMangler::mangleType(const VectorType *T) { 1522 if ((T->getVectorKind() == VectorType::NeonVector || 1523 T->getVectorKind() == VectorType::NeonPolyVector)) { 1524 mangleNeonVectorType(T); 1525 return; 1526 } 1527 Out << "Dv" << T->getNumElements() << '_'; 1528 if (T->getVectorKind() == VectorType::AltiVecPixel) 1529 Out << 'p'; 1530 else if (T->getVectorKind() == VectorType::AltiVecBool) 1531 Out << 'b'; 1532 else 1533 mangleType(T->getElementType()); 1534} 1535void CXXNameMangler::mangleType(const ExtVectorType *T) { 1536 mangleType(static_cast<const VectorType*>(T)); 1537} 1538void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) { 1539 Out << "Dv"; 1540 mangleExpression(T->getSizeExpr()); 1541 Out << '_'; 1542 mangleType(T->getElementType()); 1543} 1544 1545void CXXNameMangler::mangleType(const PackExpansionType *T) { 1546 // <type> ::= Dp <type> # pack expansion (C++0x) 1547 Out << "Dp"; 1548 mangleType(T->getPattern()); 1549} 1550 1551void CXXNameMangler::mangleType(const ObjCInterfaceType *T) { 1552 mangleSourceName(T->getDecl()->getIdentifier()); 1553} 1554 1555void CXXNameMangler::mangleType(const ObjCObjectType *T) { 1556 // We don't allow overloading by different protocol qualification, 1557 // so mangling them isn't necessary. 1558 mangleType(T->getBaseType()); 1559} 1560 1561void CXXNameMangler::mangleType(const BlockPointerType *T) { 1562 Out << "U13block_pointer"; 1563 mangleType(T->getPointeeType()); 1564} 1565 1566void CXXNameMangler::mangleType(const InjectedClassNameType *T) { 1567 // Mangle injected class name types as if the user had written the 1568 // specialization out fully. It may not actually be possible to see 1569 // this mangling, though. 1570 mangleType(T->getInjectedSpecializationType()); 1571} 1572 1573void CXXNameMangler::mangleType(const TemplateSpecializationType *T) { 1574 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) { 1575 mangleName(TD, T->getArgs(), T->getNumArgs()); 1576 } else { 1577 if (mangleSubstitution(QualType(T, 0))) 1578 return; 1579 1580 mangleTemplatePrefix(T->getTemplateName()); 1581 1582 // FIXME: GCC does not appear to mangle the template arguments when 1583 // the template in question is a dependent template name. Should we 1584 // emulate that badness? 1585 mangleTemplateArgs(T->getTemplateName(), T->getArgs(), T->getNumArgs()); 1586 addSubstitution(QualType(T, 0)); 1587 } 1588} 1589 1590void CXXNameMangler::mangleType(const DependentNameType *T) { 1591 // Typename types are always nested 1592 Out << 'N'; 1593 mangleUnresolvedScope(T->getQualifier()); 1594 mangleSourceName(T->getIdentifier()); 1595 Out << 'E'; 1596} 1597 1598void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) { 1599 // Dependently-scoped template types are always nested 1600 Out << 'N'; 1601 1602 // TODO: avoid making this TemplateName. 1603 TemplateName Prefix = 1604 getASTContext().getDependentTemplateName(T->getQualifier(), 1605 T->getIdentifier()); 1606 mangleTemplatePrefix(Prefix); 1607 1608 // FIXME: GCC does not appear to mangle the template arguments when 1609 // the template in question is a dependent template name. Should we 1610 // emulate that badness? 1611 mangleTemplateArgs(Prefix, T->getArgs(), T->getNumArgs()); 1612 Out << 'E'; 1613} 1614 1615void CXXNameMangler::mangleType(const TypeOfType *T) { 1616 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 1617 // "extension with parameters" mangling. 1618 Out << "u6typeof"; 1619} 1620 1621void CXXNameMangler::mangleType(const TypeOfExprType *T) { 1622 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 1623 // "extension with parameters" mangling. 1624 Out << "u6typeof"; 1625} 1626 1627void CXXNameMangler::mangleType(const DecltypeType *T) { 1628 Expr *E = T->getUnderlyingExpr(); 1629 1630 // type ::= Dt <expression> E # decltype of an id-expression 1631 // # or class member access 1632 // ::= DT <expression> E # decltype of an expression 1633 1634 // This purports to be an exhaustive list of id-expressions and 1635 // class member accesses. Note that we do not ignore parentheses; 1636 // parentheses change the semantics of decltype for these 1637 // expressions (and cause the mangler to use the other form). 1638 if (isa<DeclRefExpr>(E) || 1639 isa<MemberExpr>(E) || 1640 isa<UnresolvedLookupExpr>(E) || 1641 isa<DependentScopeDeclRefExpr>(E) || 1642 isa<CXXDependentScopeMemberExpr>(E) || 1643 isa<UnresolvedMemberExpr>(E)) 1644 Out << "Dt"; 1645 else 1646 Out << "DT"; 1647 mangleExpression(E); 1648 Out << 'E'; 1649} 1650 1651void CXXNameMangler::mangleIntegerLiteral(QualType T, 1652 const llvm::APSInt &Value) { 1653 // <expr-primary> ::= L <type> <value number> E # integer literal 1654 Out << 'L'; 1655 1656 mangleType(T); 1657 if (T->isBooleanType()) { 1658 // Boolean values are encoded as 0/1. 1659 Out << (Value.getBoolValue() ? '1' : '0'); 1660 } else { 1661 mangleNumber(Value); 1662 } 1663 Out << 'E'; 1664 1665} 1666 1667/// Mangles a member expression. Implicit accesses are not handled, 1668/// but that should be okay, because you shouldn't be able to 1669/// make an implicit access in a function template declaration. 1670void CXXNameMangler::mangleMemberExpr(const Expr *Base, 1671 bool IsArrow, 1672 NestedNameSpecifier *Qualifier, 1673 DeclarationName Member, 1674 unsigned Arity) { 1675 // gcc-4.4 uses 'dt' for dot expressions, which is reasonable. 1676 // OTOH, gcc also mangles the name as an expression. 1677 Out << (IsArrow ? "pt" : "dt"); 1678 mangleExpression(Base); 1679 mangleUnresolvedName(Qualifier, Member, Arity); 1680} 1681 1682void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) { 1683 // <expression> ::= <unary operator-name> <expression> 1684 // ::= <binary operator-name> <expression> <expression> 1685 // ::= <trinary operator-name> <expression> <expression> <expression> 1686 // ::= cl <expression>* E # call 1687 // ::= cv <type> expression # conversion with one argument 1688 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments 1689 // ::= st <type> # sizeof (a type) 1690 // ::= at <type> # alignof (a type) 1691 // ::= <template-param> 1692 // ::= <function-param> 1693 // ::= sr <type> <unqualified-name> # dependent name 1694 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 1695 // ::= sZ <template-param> # size of a parameter pack 1696 // ::= sZ <function-param> # size of a function parameter pack 1697 // ::= <expr-primary> 1698 // <expr-primary> ::= L <type> <value number> E # integer literal 1699 // ::= L <type <value float> E # floating literal 1700 // ::= L <mangled-name> E # external name 1701 switch (E->getStmtClass()) { 1702 case Expr::NoStmtClass: 1703#define ABSTRACT_STMT(Type) 1704#define EXPR(Type, Base) 1705#define STMT(Type, Base) \ 1706 case Expr::Type##Class: 1707#include "clang/AST/StmtNodes.inc" 1708 // fallthrough 1709 1710 // These all can only appear in local or variable-initialization 1711 // contexts and so should never appear in a mangling. 1712 case Expr::AddrLabelExprClass: 1713 case Expr::BlockDeclRefExprClass: 1714 case Expr::CXXThisExprClass: 1715 case Expr::DesignatedInitExprClass: 1716 case Expr::ImplicitValueInitExprClass: 1717 case Expr::InitListExprClass: 1718 case Expr::ParenListExprClass: 1719 case Expr::CXXScalarValueInitExprClass: 1720 llvm_unreachable("unexpected statement kind"); 1721 break; 1722 1723 // FIXME: invent manglings for all these. 1724 case Expr::BlockExprClass: 1725 case Expr::CXXPseudoDestructorExprClass: 1726 case Expr::ChooseExprClass: 1727 case Expr::CompoundLiteralExprClass: 1728 case Expr::ExtVectorElementExprClass: 1729 case Expr::ObjCEncodeExprClass: 1730 case Expr::ObjCIsaExprClass: 1731 case Expr::ObjCIvarRefExprClass: 1732 case Expr::ObjCMessageExprClass: 1733 case Expr::ObjCPropertyRefExprClass: 1734 case Expr::ObjCProtocolExprClass: 1735 case Expr::ObjCSelectorExprClass: 1736 case Expr::ObjCStringLiteralClass: 1737 case Expr::OffsetOfExprClass: 1738 case Expr::PredefinedExprClass: 1739 case Expr::ShuffleVectorExprClass: 1740 case Expr::StmtExprClass: 1741 case Expr::UnaryTypeTraitExprClass: 1742 case Expr::BinaryTypeTraitExprClass: 1743 case Expr::VAArgExprClass: 1744 case Expr::CXXUuidofExprClass: 1745 case Expr::CXXNoexceptExprClass: 1746 case Expr::CUDAKernelCallExprClass: { 1747 // As bad as this diagnostic is, it's better than crashing. 1748 Diagnostic &Diags = Context.getDiags(); 1749 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 1750 "cannot yet mangle expression type %0"); 1751 Diags.Report(E->getExprLoc(), DiagID) 1752 << E->getStmtClassName() << E->getSourceRange(); 1753 break; 1754 } 1755 1756 // Even gcc-4.5 doesn't mangle this. 1757 case Expr::BinaryConditionalOperatorClass: { 1758 Diagnostic &Diags = Context.getDiags(); 1759 unsigned DiagID = 1760 Diags.getCustomDiagID(Diagnostic::Error, 1761 "?: operator with omitted middle operand cannot be mangled"); 1762 Diags.Report(E->getExprLoc(), DiagID) 1763 << E->getStmtClassName() << E->getSourceRange(); 1764 break; 1765 } 1766 1767 // These are used for internal purposes and cannot be meaningfully mangled. 1768 case Expr::OpaqueValueExprClass: 1769 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?"); 1770 1771 case Expr::CXXDefaultArgExprClass: 1772 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity); 1773 break; 1774 1775 case Expr::CXXMemberCallExprClass: // fallthrough 1776 case Expr::CallExprClass: { 1777 const CallExpr *CE = cast<CallExpr>(E); 1778 Out << "cl"; 1779 mangleExpression(CE->getCallee(), CE->getNumArgs()); 1780 for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I) 1781 mangleExpression(CE->getArg(I)); 1782 Out << 'E'; 1783 break; 1784 } 1785 1786 case Expr::CXXNewExprClass: { 1787 // Proposal from David Vandervoorde, 2010.06.30 1788 const CXXNewExpr *New = cast<CXXNewExpr>(E); 1789 if (New->isGlobalNew()) Out << "gs"; 1790 Out << (New->isArray() ? "na" : "nw"); 1791 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(), 1792 E = New->placement_arg_end(); I != E; ++I) 1793 mangleExpression(*I); 1794 Out << '_'; 1795 mangleType(New->getAllocatedType()); 1796 if (New->hasInitializer()) { 1797 Out << "pi"; 1798 for (CXXNewExpr::const_arg_iterator I = New->constructor_arg_begin(), 1799 E = New->constructor_arg_end(); I != E; ++I) 1800 mangleExpression(*I); 1801 } 1802 Out << 'E'; 1803 break; 1804 } 1805 1806 case Expr::MemberExprClass: { 1807 const MemberExpr *ME = cast<MemberExpr>(E); 1808 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1809 ME->getQualifier(), ME->getMemberDecl()->getDeclName(), 1810 Arity); 1811 break; 1812 } 1813 1814 case Expr::UnresolvedMemberExprClass: { 1815 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E); 1816 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1817 ME->getQualifier(), ME->getMemberName(), 1818 Arity); 1819 if (ME->hasExplicitTemplateArgs()) 1820 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 1821 break; 1822 } 1823 1824 case Expr::CXXDependentScopeMemberExprClass: { 1825 const CXXDependentScopeMemberExpr *ME 1826 = cast<CXXDependentScopeMemberExpr>(E); 1827 mangleMemberExpr(ME->getBase(), ME->isArrow(), 1828 ME->getQualifier(), ME->getMember(), 1829 Arity); 1830 if (ME->hasExplicitTemplateArgs()) 1831 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 1832 break; 1833 } 1834 1835 case Expr::UnresolvedLookupExprClass: { 1836 // The ABI doesn't cover how to mangle overload sets, so we mangle 1837 // using something as close as possible to the original lookup 1838 // expression. 1839 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E); 1840 mangleUnresolvedName(ULE->getQualifier(), ULE->getName(), Arity); 1841 if (ULE->hasExplicitTemplateArgs()) 1842 mangleTemplateArgs(ULE->getExplicitTemplateArgs()); 1843 break; 1844 } 1845 1846 case Expr::CXXUnresolvedConstructExprClass: { 1847 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E); 1848 unsigned N = CE->arg_size(); 1849 1850 Out << "cv"; 1851 mangleType(CE->getType()); 1852 if (N != 1) Out << '_'; 1853 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 1854 if (N != 1) Out << 'E'; 1855 break; 1856 } 1857 1858 case Expr::CXXTemporaryObjectExprClass: 1859 case Expr::CXXConstructExprClass: { 1860 const CXXConstructExpr *CE = cast<CXXConstructExpr>(E); 1861 unsigned N = CE->getNumArgs(); 1862 1863 Out << "cv"; 1864 mangleType(CE->getType()); 1865 if (N != 1) Out << '_'; 1866 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 1867 if (N != 1) Out << 'E'; 1868 break; 1869 } 1870 1871 case Expr::SizeOfAlignOfExprClass: { 1872 const SizeOfAlignOfExpr *SAE = cast<SizeOfAlignOfExpr>(E); 1873 if (SAE->isSizeOf()) Out << 's'; 1874 else Out << 'a'; 1875 if (SAE->isArgumentType()) { 1876 Out << 't'; 1877 mangleType(SAE->getArgumentType()); 1878 } else { 1879 Out << 'z'; 1880 mangleExpression(SAE->getArgumentExpr()); 1881 } 1882 break; 1883 } 1884 1885 case Expr::CXXThrowExprClass: { 1886 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E); 1887 1888 // Proposal from David Vandervoorde, 2010.06.30 1889 if (TE->getSubExpr()) { 1890 Out << "tw"; 1891 mangleExpression(TE->getSubExpr()); 1892 } else { 1893 Out << "tr"; 1894 } 1895 break; 1896 } 1897 1898 case Expr::CXXTypeidExprClass: { 1899 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E); 1900 1901 // Proposal from David Vandervoorde, 2010.06.30 1902 if (TIE->isTypeOperand()) { 1903 Out << "ti"; 1904 mangleType(TIE->getTypeOperand()); 1905 } else { 1906 Out << "te"; 1907 mangleExpression(TIE->getExprOperand()); 1908 } 1909 break; 1910 } 1911 1912 case Expr::CXXDeleteExprClass: { 1913 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E); 1914 1915 // Proposal from David Vandervoorde, 2010.06.30 1916 if (DE->isGlobalDelete()) Out << "gs"; 1917 Out << (DE->isArrayForm() ? "da" : "dl"); 1918 mangleExpression(DE->getArgument()); 1919 break; 1920 } 1921 1922 case Expr::UnaryOperatorClass: { 1923 const UnaryOperator *UO = cast<UnaryOperator>(E); 1924 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()), 1925 /*Arity=*/1); 1926 mangleExpression(UO->getSubExpr()); 1927 break; 1928 } 1929 1930 case Expr::ArraySubscriptExprClass: { 1931 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E); 1932 1933 // Array subscript is treated as a syntactically wierd form of 1934 // binary operator. 1935 Out << "ix"; 1936 mangleExpression(AE->getLHS()); 1937 mangleExpression(AE->getRHS()); 1938 break; 1939 } 1940 1941 case Expr::CompoundAssignOperatorClass: // fallthrough 1942 case Expr::BinaryOperatorClass: { 1943 const BinaryOperator *BO = cast<BinaryOperator>(E); 1944 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()), 1945 /*Arity=*/2); 1946 mangleExpression(BO->getLHS()); 1947 mangleExpression(BO->getRHS()); 1948 break; 1949 } 1950 1951 case Expr::ConditionalOperatorClass: { 1952 const ConditionalOperator *CO = cast<ConditionalOperator>(E); 1953 mangleOperatorName(OO_Conditional, /*Arity=*/3); 1954 mangleExpression(CO->getCond()); 1955 mangleExpression(CO->getLHS(), Arity); 1956 mangleExpression(CO->getRHS(), Arity); 1957 break; 1958 } 1959 1960 case Expr::ImplicitCastExprClass: { 1961 mangleExpression(cast<ImplicitCastExpr>(E)->getSubExpr(), Arity); 1962 break; 1963 } 1964 1965 case Expr::CStyleCastExprClass: 1966 case Expr::CXXStaticCastExprClass: 1967 case Expr::CXXDynamicCastExprClass: 1968 case Expr::CXXReinterpretCastExprClass: 1969 case Expr::CXXConstCastExprClass: 1970 case Expr::CXXFunctionalCastExprClass: { 1971 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E); 1972 Out << "cv"; 1973 mangleType(ECE->getType()); 1974 mangleExpression(ECE->getSubExpr()); 1975 break; 1976 } 1977 1978 case Expr::CXXOperatorCallExprClass: { 1979 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E); 1980 unsigned NumArgs = CE->getNumArgs(); 1981 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs); 1982 // Mangle the arguments. 1983 for (unsigned i = 0; i != NumArgs; ++i) 1984 mangleExpression(CE->getArg(i)); 1985 break; 1986 } 1987 1988 case Expr::ParenExprClass: 1989 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity); 1990 break; 1991 1992 case Expr::DeclRefExprClass: { 1993 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 1994 1995 switch (D->getKind()) { 1996 default: 1997 // <expr-primary> ::= L <mangled-name> E # external name 1998 Out << 'L'; 1999 mangle(D, "_Z"); 2000 Out << 'E'; 2001 break; 2002 2003 case Decl::EnumConstant: { 2004 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D); 2005 mangleIntegerLiteral(ED->getType(), ED->getInitVal()); 2006 break; 2007 } 2008 2009 case Decl::NonTypeTemplateParm: { 2010 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D); 2011 mangleTemplateParameter(PD->getIndex()); 2012 break; 2013 } 2014 2015 } 2016 2017 break; 2018 } 2019 2020 case Expr::SubstNonTypeTemplateParmPackExprClass: 2021 mangleTemplateParameter( 2022 cast<SubstNonTypeTemplateParmPackExpr>(E)->getParameterPack()->getIndex()); 2023 break; 2024 2025 case Expr::DependentScopeDeclRefExprClass: { 2026 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E); 2027 NestedNameSpecifier *NNS = DRE->getQualifier(); 2028 const Type *QTy = NNS->getAsType(); 2029 2030 // When we're dealing with a nested-name-specifier that has just a 2031 // dependent identifier in it, mangle that as a typename. FIXME: 2032 // It isn't clear that we ever actually want to have such a 2033 // nested-name-specifier; why not just represent it as a typename type? 2034 if (!QTy && NNS->getAsIdentifier() && NNS->getPrefix()) { 2035 QTy = getASTContext().getDependentNameType(ETK_Typename, 2036 NNS->getPrefix(), 2037 NNS->getAsIdentifier()) 2038 .getTypePtr(); 2039 } 2040 assert(QTy && "Qualifier was not type!"); 2041 2042 // ::= sr <type> <unqualified-name> # dependent name 2043 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 2044 Out << "sr"; 2045 mangleType(QualType(QTy, 0)); 2046 mangleUnqualifiedName(0, DRE->getDeclName(), Arity); 2047 if (DRE->hasExplicitTemplateArgs()) 2048 mangleTemplateArgs(DRE->getExplicitTemplateArgs()); 2049 2050 break; 2051 } 2052 2053 case Expr::CXXBindTemporaryExprClass: 2054 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr()); 2055 break; 2056 2057 case Expr::ExprWithCleanupsClass: 2058 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity); 2059 break; 2060 2061 case Expr::FloatingLiteralClass: { 2062 const FloatingLiteral *FL = cast<FloatingLiteral>(E); 2063 Out << 'L'; 2064 mangleType(FL->getType()); 2065 mangleFloat(FL->getValue()); 2066 Out << 'E'; 2067 break; 2068 } 2069 2070 case Expr::CharacterLiteralClass: 2071 Out << 'L'; 2072 mangleType(E->getType()); 2073 Out << cast<CharacterLiteral>(E)->getValue(); 2074 Out << 'E'; 2075 break; 2076 2077 case Expr::CXXBoolLiteralExprClass: 2078 Out << "Lb"; 2079 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2080 Out << 'E'; 2081 break; 2082 2083 case Expr::IntegerLiteralClass: { 2084 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue()); 2085 if (E->getType()->isSignedIntegerType()) 2086 Value.setIsSigned(true); 2087 mangleIntegerLiteral(E->getType(), Value); 2088 break; 2089 } 2090 2091 case Expr::ImaginaryLiteralClass: { 2092 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E); 2093 // Mangle as if a complex literal. 2094 // Proposal from David Vandevoorde, 2010.06.30. 2095 Out << 'L'; 2096 mangleType(E->getType()); 2097 if (const FloatingLiteral *Imag = 2098 dyn_cast<FloatingLiteral>(IE->getSubExpr())) { 2099 // Mangle a floating-point zero of the appropriate type. 2100 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics())); 2101 Out << '_'; 2102 mangleFloat(Imag->getValue()); 2103 } else { 2104 Out << "0_"; 2105 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue()); 2106 if (IE->getSubExpr()->getType()->isSignedIntegerType()) 2107 Value.setIsSigned(true); 2108 mangleNumber(Value); 2109 } 2110 Out << 'E'; 2111 break; 2112 } 2113 2114 case Expr::StringLiteralClass: { 2115 // Revised proposal from David Vandervoorde, 2010.07.15. 2116 Out << 'L'; 2117 assert(isa<ConstantArrayType>(E->getType())); 2118 mangleType(E->getType()); 2119 Out << 'E'; 2120 break; 2121 } 2122 2123 case Expr::GNUNullExprClass: 2124 // FIXME: should this really be mangled the same as nullptr? 2125 // fallthrough 2126 2127 case Expr::CXXNullPtrLiteralExprClass: { 2128 // Proposal from David Vandervoorde, 2010.06.30, as 2129 // modified by ABI list discussion. 2130 Out << "LDnE"; 2131 break; 2132 } 2133 2134 case Expr::PackExpansionExprClass: 2135 Out << "sp"; 2136 mangleExpression(cast<PackExpansionExpr>(E)->getPattern()); 2137 break; 2138 2139 case Expr::SizeOfPackExprClass: { 2140 Out << "sZ"; 2141 const NamedDecl *Pack = cast<SizeOfPackExpr>(E)->getPack(); 2142 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack)) 2143 mangleTemplateParameter(TTP->getIndex()); 2144 else if (const NonTypeTemplateParmDecl *NTTP 2145 = dyn_cast<NonTypeTemplateParmDecl>(Pack)) 2146 mangleTemplateParameter(NTTP->getIndex()); 2147 else if (const TemplateTemplateParmDecl *TempTP 2148 = dyn_cast<TemplateTemplateParmDecl>(Pack)) 2149 mangleTemplateParameter(TempTP->getIndex()); 2150 else { 2151 // Note: proposed by Mike Herrick on 11/30/10 2152 // <expression> ::= sZ <function-param> # size of function parameter pack 2153 Diagnostic &Diags = Context.getDiags(); 2154 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 2155 "cannot mangle sizeof...(function parameter pack)"); 2156 Diags.Report(DiagID); 2157 return; 2158 } 2159 } 2160 } 2161} 2162 2163void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) { 2164 // <ctor-dtor-name> ::= C1 # complete object constructor 2165 // ::= C2 # base object constructor 2166 // ::= C3 # complete object allocating constructor 2167 // 2168 switch (T) { 2169 case Ctor_Complete: 2170 Out << "C1"; 2171 break; 2172 case Ctor_Base: 2173 Out << "C2"; 2174 break; 2175 case Ctor_CompleteAllocating: 2176 Out << "C3"; 2177 break; 2178 } 2179} 2180 2181void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) { 2182 // <ctor-dtor-name> ::= D0 # deleting destructor 2183 // ::= D1 # complete object destructor 2184 // ::= D2 # base object destructor 2185 // 2186 switch (T) { 2187 case Dtor_Deleting: 2188 Out << "D0"; 2189 break; 2190 case Dtor_Complete: 2191 Out << "D1"; 2192 break; 2193 case Dtor_Base: 2194 Out << "D2"; 2195 break; 2196 } 2197} 2198 2199void CXXNameMangler::mangleTemplateArgs( 2200 const ExplicitTemplateArgumentList &TemplateArgs) { 2201 // <template-args> ::= I <template-arg>+ E 2202 Out << 'I'; 2203 for (unsigned I = 0, E = TemplateArgs.NumTemplateArgs; I != E; ++I) 2204 mangleTemplateArg(0, TemplateArgs.getTemplateArgs()[I].getArgument()); 2205 Out << 'E'; 2206} 2207 2208void CXXNameMangler::mangleTemplateArgs(TemplateName Template, 2209 const TemplateArgument *TemplateArgs, 2210 unsigned NumTemplateArgs) { 2211 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2212 return mangleTemplateArgs(*TD->getTemplateParameters(), TemplateArgs, 2213 NumTemplateArgs); 2214 2215 // <template-args> ::= I <template-arg>+ E 2216 Out << 'I'; 2217 for (unsigned i = 0; i != NumTemplateArgs; ++i) 2218 mangleTemplateArg(0, TemplateArgs[i]); 2219 Out << 'E'; 2220} 2221 2222void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2223 const TemplateArgumentList &AL) { 2224 // <template-args> ::= I <template-arg>+ E 2225 Out << 'I'; 2226 for (unsigned i = 0, e = AL.size(); i != e; ++i) 2227 mangleTemplateArg(PL.getParam(i), AL[i]); 2228 Out << 'E'; 2229} 2230 2231void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2232 const TemplateArgument *TemplateArgs, 2233 unsigned NumTemplateArgs) { 2234 // <template-args> ::= I <template-arg>+ E 2235 Out << 'I'; 2236 for (unsigned i = 0; i != NumTemplateArgs; ++i) 2237 mangleTemplateArg(PL.getParam(i), TemplateArgs[i]); 2238 Out << 'E'; 2239} 2240 2241void CXXNameMangler::mangleTemplateArg(const NamedDecl *P, 2242 const TemplateArgument &A) { 2243 // <template-arg> ::= <type> # type or template 2244 // ::= X <expression> E # expression 2245 // ::= <expr-primary> # simple expressions 2246 // ::= J <template-arg>* E # argument pack 2247 // ::= sp <expression> # pack expansion of (C++0x) 2248 switch (A.getKind()) { 2249 case TemplateArgument::Null: 2250 llvm_unreachable("Cannot mangle NULL template argument"); 2251 2252 case TemplateArgument::Type: 2253 mangleType(A.getAsType()); 2254 break; 2255 case TemplateArgument::Template: 2256 // This is mangled as <type>. 2257 mangleType(A.getAsTemplate()); 2258 break; 2259 case TemplateArgument::TemplateExpansion: 2260 // <type> ::= Dp <type> # pack expansion (C++0x) 2261 Out << "Dp"; 2262 mangleType(A.getAsTemplateOrTemplatePattern()); 2263 break; 2264 case TemplateArgument::Expression: 2265 Out << 'X'; 2266 mangleExpression(A.getAsExpr()); 2267 Out << 'E'; 2268 break; 2269 case TemplateArgument::Integral: 2270 mangleIntegerLiteral(A.getIntegralType(), *A.getAsIntegral()); 2271 break; 2272 case TemplateArgument::Declaration: { 2273 assert(P && "Missing template parameter for declaration argument"); 2274 // <expr-primary> ::= L <mangled-name> E # external name 2275 2276 // Clang produces AST's where pointer-to-member-function expressions 2277 // and pointer-to-function expressions are represented as a declaration not 2278 // an expression. We compensate for it here to produce the correct mangling. 2279 NamedDecl *D = cast<NamedDecl>(A.getAsDecl()); 2280 const NonTypeTemplateParmDecl *Parameter = cast<NonTypeTemplateParmDecl>(P); 2281 bool compensateMangling = D->isCXXClassMember() && 2282 !Parameter->getType()->isReferenceType(); 2283 if (compensateMangling) { 2284 Out << 'X'; 2285 mangleOperatorName(OO_Amp, 1); 2286 } 2287 2288 Out << 'L'; 2289 // References to external entities use the mangled name; if the name would 2290 // not normally be manged then mangle it as unqualified. 2291 // 2292 // FIXME: The ABI specifies that external names here should have _Z, but 2293 // gcc leaves this off. 2294 if (compensateMangling) 2295 mangle(D, "_Z"); 2296 else 2297 mangle(D, "Z"); 2298 Out << 'E'; 2299 2300 if (compensateMangling) 2301 Out << 'E'; 2302 2303 break; 2304 } 2305 2306 case TemplateArgument::Pack: { 2307 // Note: proposal by Mike Herrick on 12/20/10 2308 Out << 'J'; 2309 for (TemplateArgument::pack_iterator PA = A.pack_begin(), 2310 PAEnd = A.pack_end(); 2311 PA != PAEnd; ++PA) 2312 mangleTemplateArg(P, *PA); 2313 Out << 'E'; 2314 } 2315 } 2316} 2317 2318void CXXNameMangler::mangleTemplateParameter(unsigned Index) { 2319 // <template-param> ::= T_ # first template parameter 2320 // ::= T <parameter-2 non-negative number> _ 2321 if (Index == 0) 2322 Out << "T_"; 2323 else 2324 Out << 'T' << (Index - 1) << '_'; 2325} 2326 2327// <substitution> ::= S <seq-id> _ 2328// ::= S_ 2329bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) { 2330 // Try one of the standard substitutions first. 2331 if (mangleStandardSubstitution(ND)) 2332 return true; 2333 2334 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 2335 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND)); 2336} 2337 2338bool CXXNameMangler::mangleSubstitution(QualType T) { 2339 if (!T.getCVRQualifiers()) { 2340 if (const RecordType *RT = T->getAs<RecordType>()) 2341 return mangleSubstitution(RT->getDecl()); 2342 } 2343 2344 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 2345 2346 return mangleSubstitution(TypePtr); 2347} 2348 2349bool CXXNameMangler::mangleSubstitution(TemplateName Template) { 2350 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2351 return mangleSubstitution(TD); 2352 2353 Template = Context.getASTContext().getCanonicalTemplateName(Template); 2354 return mangleSubstitution( 2355 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 2356} 2357 2358bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) { 2359 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr); 2360 if (I == Substitutions.end()) 2361 return false; 2362 2363 unsigned SeqID = I->second; 2364 if (SeqID == 0) 2365 Out << "S_"; 2366 else { 2367 SeqID--; 2368 2369 // <seq-id> is encoded in base-36, using digits and upper case letters. 2370 char Buffer[10]; 2371 char *BufferPtr = llvm::array_endof(Buffer); 2372 2373 if (SeqID == 0) *--BufferPtr = '0'; 2374 2375 while (SeqID) { 2376 assert(BufferPtr > Buffer && "Buffer overflow!"); 2377 2378 char c = static_cast<char>(SeqID % 36); 2379 2380 *--BufferPtr = (c < 10 ? '0' + c : 'A' + c - 10); 2381 SeqID /= 36; 2382 } 2383 2384 Out << 'S' 2385 << llvm::StringRef(BufferPtr, llvm::array_endof(Buffer)-BufferPtr) 2386 << '_'; 2387 } 2388 2389 return true; 2390} 2391 2392static bool isCharType(QualType T) { 2393 if (T.isNull()) 2394 return false; 2395 2396 return T->isSpecificBuiltinType(BuiltinType::Char_S) || 2397 T->isSpecificBuiltinType(BuiltinType::Char_U); 2398} 2399 2400/// isCharSpecialization - Returns whether a given type is a template 2401/// specialization of a given name with a single argument of type char. 2402static bool isCharSpecialization(QualType T, const char *Name) { 2403 if (T.isNull()) 2404 return false; 2405 2406 const RecordType *RT = T->getAs<RecordType>(); 2407 if (!RT) 2408 return false; 2409 2410 const ClassTemplateSpecializationDecl *SD = 2411 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); 2412 if (!SD) 2413 return false; 2414 2415 if (!isStdNamespace(SD->getDeclContext())) 2416 return false; 2417 2418 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2419 if (TemplateArgs.size() != 1) 2420 return false; 2421 2422 if (!isCharType(TemplateArgs[0].getAsType())) 2423 return false; 2424 2425 return SD->getIdentifier()->getName() == Name; 2426} 2427 2428template <std::size_t StrLen> 2429static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD, 2430 const char (&Str)[StrLen]) { 2431 if (!SD->getIdentifier()->isStr(Str)) 2432 return false; 2433 2434 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2435 if (TemplateArgs.size() != 2) 2436 return false; 2437 2438 if (!isCharType(TemplateArgs[0].getAsType())) 2439 return false; 2440 2441 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 2442 return false; 2443 2444 return true; 2445} 2446 2447bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) { 2448 // <substitution> ::= St # ::std:: 2449 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 2450 if (isStd(NS)) { 2451 Out << "St"; 2452 return true; 2453 } 2454 } 2455 2456 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) { 2457 if (!isStdNamespace(TD->getDeclContext())) 2458 return false; 2459 2460 // <substitution> ::= Sa # ::std::allocator 2461 if (TD->getIdentifier()->isStr("allocator")) { 2462 Out << "Sa"; 2463 return true; 2464 } 2465 2466 // <<substitution> ::= Sb # ::std::basic_string 2467 if (TD->getIdentifier()->isStr("basic_string")) { 2468 Out << "Sb"; 2469 return true; 2470 } 2471 } 2472 2473 if (const ClassTemplateSpecializationDecl *SD = 2474 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 2475 if (!isStdNamespace(SD->getDeclContext())) 2476 return false; 2477 2478 // <substitution> ::= Ss # ::std::basic_string<char, 2479 // ::std::char_traits<char>, 2480 // ::std::allocator<char> > 2481 if (SD->getIdentifier()->isStr("basic_string")) { 2482 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 2483 2484 if (TemplateArgs.size() != 3) 2485 return false; 2486 2487 if (!isCharType(TemplateArgs[0].getAsType())) 2488 return false; 2489 2490 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 2491 return false; 2492 2493 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator")) 2494 return false; 2495 2496 Out << "Ss"; 2497 return true; 2498 } 2499 2500 // <substitution> ::= Si # ::std::basic_istream<char, 2501 // ::std::char_traits<char> > 2502 if (isStreamCharSpecialization(SD, "basic_istream")) { 2503 Out << "Si"; 2504 return true; 2505 } 2506 2507 // <substitution> ::= So # ::std::basic_ostream<char, 2508 // ::std::char_traits<char> > 2509 if (isStreamCharSpecialization(SD, "basic_ostream")) { 2510 Out << "So"; 2511 return true; 2512 } 2513 2514 // <substitution> ::= Sd # ::std::basic_iostream<char, 2515 // ::std::char_traits<char> > 2516 if (isStreamCharSpecialization(SD, "basic_iostream")) { 2517 Out << "Sd"; 2518 return true; 2519 } 2520 } 2521 return false; 2522} 2523 2524void CXXNameMangler::addSubstitution(QualType T) { 2525 if (!T.getCVRQualifiers()) { 2526 if (const RecordType *RT = T->getAs<RecordType>()) { 2527 addSubstitution(RT->getDecl()); 2528 return; 2529 } 2530 } 2531 2532 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 2533 addSubstitution(TypePtr); 2534} 2535 2536void CXXNameMangler::addSubstitution(TemplateName Template) { 2537 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2538 return addSubstitution(TD); 2539 2540 Template = Context.getASTContext().getCanonicalTemplateName(Template); 2541 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 2542} 2543 2544void CXXNameMangler::addSubstitution(uintptr_t Ptr) { 2545 assert(!Substitutions.count(Ptr) && "Substitution already exists!"); 2546 Substitutions[Ptr] = SeqID++; 2547} 2548 2549// 2550 2551/// \brief Mangles the name of the declaration D and emits that name to the 2552/// given output stream. 2553/// 2554/// If the declaration D requires a mangled name, this routine will emit that 2555/// mangled name to \p os and return true. Otherwise, \p os will be unchanged 2556/// and this routine will return false. In this case, the caller should just 2557/// emit the identifier of the declaration (\c D->getIdentifier()) as its 2558/// name. 2559void ItaniumMangleContext::mangleName(const NamedDecl *D, 2560 llvm::raw_ostream &Out) { 2561 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) && 2562 "Invalid mangleName() call, argument is not a variable or function!"); 2563 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) && 2564 "Invalid mangleName() call on 'structor decl!"); 2565 2566 PrettyStackTraceDecl CrashInfo(D, SourceLocation(), 2567 getASTContext().getSourceManager(), 2568 "Mangling declaration"); 2569 2570 CXXNameMangler Mangler(*this, Out); 2571 return Mangler.mangle(D); 2572} 2573 2574void ItaniumMangleContext::mangleCXXCtor(const CXXConstructorDecl *D, 2575 CXXCtorType Type, 2576 llvm::raw_ostream &Out) { 2577 CXXNameMangler Mangler(*this, Out, D, Type); 2578 Mangler.mangle(D); 2579} 2580 2581void ItaniumMangleContext::mangleCXXDtor(const CXXDestructorDecl *D, 2582 CXXDtorType Type, 2583 llvm::raw_ostream &Out) { 2584 CXXNameMangler Mangler(*this, Out, D, Type); 2585 Mangler.mangle(D); 2586} 2587 2588void ItaniumMangleContext::mangleThunk(const CXXMethodDecl *MD, 2589 const ThunkInfo &Thunk, 2590 llvm::raw_ostream &Out) { 2591 // <special-name> ::= T <call-offset> <base encoding> 2592 // # base is the nominal target function of thunk 2593 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding> 2594 // # base is the nominal target function of thunk 2595 // # first call-offset is 'this' adjustment 2596 // # second call-offset is result adjustment 2597 2598 assert(!isa<CXXDestructorDecl>(MD) && 2599 "Use mangleCXXDtor for destructor decls!"); 2600 CXXNameMangler Mangler(*this, Out); 2601 Mangler.getStream() << "_ZT"; 2602 if (!Thunk.Return.isEmpty()) 2603 Mangler.getStream() << 'c'; 2604 2605 // Mangle the 'this' pointer adjustment. 2606 Mangler.mangleCallOffset(Thunk.This.NonVirtual, Thunk.This.VCallOffsetOffset); 2607 2608 // Mangle the return pointer adjustment if there is one. 2609 if (!Thunk.Return.isEmpty()) 2610 Mangler.mangleCallOffset(Thunk.Return.NonVirtual, 2611 Thunk.Return.VBaseOffsetOffset); 2612 2613 Mangler.mangleFunctionEncoding(MD); 2614} 2615 2616void 2617ItaniumMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD, 2618 CXXDtorType Type, 2619 const ThisAdjustment &ThisAdjustment, 2620 llvm::raw_ostream &Out) { 2621 // <special-name> ::= T <call-offset> <base encoding> 2622 // # base is the nominal target function of thunk 2623 CXXNameMangler Mangler(*this, Out, DD, Type); 2624 Mangler.getStream() << "_ZT"; 2625 2626 // Mangle the 'this' pointer adjustment. 2627 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual, 2628 ThisAdjustment.VCallOffsetOffset); 2629 2630 Mangler.mangleFunctionEncoding(DD); 2631} 2632 2633/// mangleGuardVariable - Returns the mangled name for a guard variable 2634/// for the passed in VarDecl. 2635void ItaniumMangleContext::mangleItaniumGuardVariable(const VarDecl *D, 2636 llvm::raw_ostream &Out) { 2637 // <special-name> ::= GV <object name> # Guard variable for one-time 2638 // # initialization 2639 CXXNameMangler Mangler(*this, Out); 2640 Mangler.getStream() << "_ZGV"; 2641 Mangler.mangleName(D); 2642} 2643 2644void ItaniumMangleContext::mangleReferenceTemporary(const VarDecl *D, 2645 llvm::raw_ostream &Out) { 2646 // We match the GCC mangling here. 2647 // <special-name> ::= GR <object name> 2648 CXXNameMangler Mangler(*this, Out); 2649 Mangler.getStream() << "_ZGR"; 2650 Mangler.mangleName(D); 2651} 2652 2653void ItaniumMangleContext::mangleCXXVTable(const CXXRecordDecl *RD, 2654 llvm::raw_ostream &Out) { 2655 // <special-name> ::= TV <type> # virtual table 2656 CXXNameMangler Mangler(*this, Out); 2657 Mangler.getStream() << "_ZTV"; 2658 Mangler.mangleNameOrStandardSubstitution(RD); 2659} 2660 2661void ItaniumMangleContext::mangleCXXVTT(const CXXRecordDecl *RD, 2662 llvm::raw_ostream &Out) { 2663 // <special-name> ::= TT <type> # VTT structure 2664 CXXNameMangler Mangler(*this, Out); 2665 Mangler.getStream() << "_ZTT"; 2666 Mangler.mangleNameOrStandardSubstitution(RD); 2667} 2668 2669void ItaniumMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD, 2670 int64_t Offset, 2671 const CXXRecordDecl *Type, 2672 llvm::raw_ostream &Out) { 2673 // <special-name> ::= TC <type> <offset number> _ <base type> 2674 CXXNameMangler Mangler(*this, Out); 2675 Mangler.getStream() << "_ZTC"; 2676 Mangler.mangleNameOrStandardSubstitution(RD); 2677 Mangler.getStream() << Offset; 2678 Mangler.getStream() << '_'; 2679 Mangler.mangleNameOrStandardSubstitution(Type); 2680} 2681 2682void ItaniumMangleContext::mangleCXXRTTI(QualType Ty, 2683 llvm::raw_ostream &Out) { 2684 // <special-name> ::= TI <type> # typeinfo structure 2685 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers"); 2686 CXXNameMangler Mangler(*this, Out); 2687 Mangler.getStream() << "_ZTI"; 2688 Mangler.mangleType(Ty); 2689} 2690 2691void ItaniumMangleContext::mangleCXXRTTIName(QualType Ty, 2692 llvm::raw_ostream &Out) { 2693 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string) 2694 CXXNameMangler Mangler(*this, Out); 2695 Mangler.getStream() << "_ZTS"; 2696 Mangler.mangleType(Ty); 2697} 2698 2699MangleContext *clang::createItaniumMangleContext(ASTContext &Context, 2700 Diagnostic &Diags) { 2701 return new ItaniumMangleContext(Context, Diags); 2702} 2703