ItaniumMangle.cpp revision 66cff7257698d5528632917d38f9a3037bb1506d
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/AST/ExprObjC.h" 25#include "clang/AST/TypeLoc.h" 26#include "clang/Basic/ABI.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/StringExtras.h" 30#include "llvm/Support/raw_ostream.h" 31#include "llvm/Support/ErrorHandling.h" 32 33#define MANGLE_CHECKER 0 34 35#if MANGLE_CHECKER 36#include <cxxabi.h> 37#endif 38 39using namespace clang; 40 41namespace { 42 43/// \brief Retrieve the declaration context that should be used when mangling 44/// the given declaration. 45static const DeclContext *getEffectiveDeclContext(const Decl *D) { 46 // The ABI assumes that lambda closure types that occur within 47 // default arguments live in the context of the function. However, due to 48 // the way in which Clang parses and creates function declarations, this is 49 // not the case: the lambda closure type ends up living in the context 50 // where the function itself resides, because the function declaration itself 51 // had not yet been created. Fix the context here. 52 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) { 53 if (RD->isLambda()) 54 if (ParmVarDecl *ContextParam 55 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl())) 56 return ContextParam->getDeclContext(); 57 } 58 59 return D->getDeclContext(); 60} 61 62static const DeclContext *getEffectiveParentContext(const DeclContext *DC) { 63 return getEffectiveDeclContext(cast<Decl>(DC)); 64} 65 66static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) { 67 const DeclContext *DC = dyn_cast<DeclContext>(ND); 68 if (!DC) 69 DC = getEffectiveDeclContext(ND); 70 while (!DC->isNamespace() && !DC->isTranslationUnit()) { 71 const DeclContext *Parent = getEffectiveDeclContext(cast<Decl>(DC)); 72 if (isa<FunctionDecl>(Parent)) 73 return dyn_cast<CXXRecordDecl>(DC); 74 DC = Parent; 75 } 76 return 0; 77} 78 79static const FunctionDecl *getStructor(const FunctionDecl *fn) { 80 if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate()) 81 return ftd->getTemplatedDecl(); 82 83 return fn; 84} 85 86static const NamedDecl *getStructor(const NamedDecl *decl) { 87 const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl); 88 return (fn ? getStructor(fn) : decl); 89} 90 91static const unsigned UnknownArity = ~0U; 92 93class ItaniumMangleContext : public MangleContext { 94 llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds; 95 unsigned Discriminator; 96 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier; 97 98public: 99 explicit ItaniumMangleContext(ASTContext &Context, 100 DiagnosticsEngine &Diags) 101 : MangleContext(Context, Diags) { } 102 103 uint64_t getAnonymousStructId(const TagDecl *TD) { 104 std::pair<llvm::DenseMap<const TagDecl *, 105 uint64_t>::iterator, bool> Result = 106 AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size())); 107 return Result.first->second; 108 } 109 110 void startNewFunction() { 111 MangleContext::startNewFunction(); 112 mangleInitDiscriminator(); 113 } 114 115 /// @name Mangler Entry Points 116 /// @{ 117 118 bool shouldMangleDeclName(const NamedDecl *D); 119 void mangleName(const NamedDecl *D, raw_ostream &); 120 void mangleThunk(const CXXMethodDecl *MD, 121 const ThunkInfo &Thunk, 122 raw_ostream &); 123 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, 124 const ThisAdjustment &ThisAdjustment, 125 raw_ostream &); 126 void mangleReferenceTemporary(const VarDecl *D, 127 raw_ostream &); 128 void mangleCXXVTable(const CXXRecordDecl *RD, 129 raw_ostream &); 130 void mangleCXXVTT(const CXXRecordDecl *RD, 131 raw_ostream &); 132 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset, 133 const CXXRecordDecl *Type, 134 raw_ostream &); 135 void mangleCXXRTTI(QualType T, raw_ostream &); 136 void mangleCXXRTTIName(QualType T, raw_ostream &); 137 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type, 138 raw_ostream &); 139 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type, 140 raw_ostream &); 141 142 void mangleItaniumGuardVariable(const VarDecl *D, raw_ostream &); 143 144 void mangleInitDiscriminator() { 145 Discriminator = 0; 146 } 147 148 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) { 149 // Lambda closure types with external linkage (indicated by a 150 // non-zero lambda mangling number) have their own numbering scheme, so 151 // they do not need a discriminator. 152 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(ND)) 153 if (RD->isLambda() && RD->getLambdaManglingNumber() > 0) 154 return false; 155 156 unsigned &discriminator = Uniquifier[ND]; 157 if (!discriminator) 158 discriminator = ++Discriminator; 159 if (discriminator == 1) 160 return false; 161 disc = discriminator-2; 162 return true; 163 } 164 /// @} 165}; 166 167/// CXXNameMangler - Manage the mangling of a single name. 168class CXXNameMangler { 169 ItaniumMangleContext &Context; 170 raw_ostream &Out; 171 172 /// The "structor" is the top-level declaration being mangled, if 173 /// that's not a template specialization; otherwise it's the pattern 174 /// for that specialization. 175 const NamedDecl *Structor; 176 unsigned StructorType; 177 178 /// SeqID - The next subsitution sequence number. 179 unsigned SeqID; 180 181 class FunctionTypeDepthState { 182 unsigned Bits; 183 184 enum { InResultTypeMask = 1 }; 185 186 public: 187 FunctionTypeDepthState() : Bits(0) {} 188 189 /// The number of function types we're inside. 190 unsigned getDepth() const { 191 return Bits >> 1; 192 } 193 194 /// True if we're in the return type of the innermost function type. 195 bool isInResultType() const { 196 return Bits & InResultTypeMask; 197 } 198 199 FunctionTypeDepthState push() { 200 FunctionTypeDepthState tmp = *this; 201 Bits = (Bits & ~InResultTypeMask) + 2; 202 return tmp; 203 } 204 205 void enterResultType() { 206 Bits |= InResultTypeMask; 207 } 208 209 void leaveResultType() { 210 Bits &= ~InResultTypeMask; 211 } 212 213 void pop(FunctionTypeDepthState saved) { 214 assert(getDepth() == saved.getDepth() + 1); 215 Bits = saved.Bits; 216 } 217 218 } FunctionTypeDepth; 219 220 llvm::DenseMap<uintptr_t, unsigned> Substitutions; 221 222 ASTContext &getASTContext() const { return Context.getASTContext(); } 223 224public: 225 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 226 const NamedDecl *D = 0) 227 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(0), 228 SeqID(0) { 229 // These can't be mangled without a ctor type or dtor type. 230 assert(!D || (!isa<CXXDestructorDecl>(D) && 231 !isa<CXXConstructorDecl>(D))); 232 } 233 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 234 const CXXConstructorDecl *D, CXXCtorType Type) 235 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 236 SeqID(0) { } 237 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 238 const CXXDestructorDecl *D, CXXDtorType Type) 239 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 240 SeqID(0) { } 241 242#if MANGLE_CHECKER 243 ~CXXNameMangler() { 244 if (Out.str()[0] == '\01') 245 return; 246 247 int status = 0; 248 char *result = abi::__cxa_demangle(Out.str().str().c_str(), 0, 0, &status); 249 assert(status == 0 && "Could not demangle mangled name!"); 250 free(result); 251 } 252#endif 253 raw_ostream &getStream() { return Out; } 254 255 void mangle(const NamedDecl *D, StringRef Prefix = "_Z"); 256 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual); 257 void mangleNumber(const llvm::APSInt &I); 258 void mangleNumber(int64_t Number); 259 void mangleFloat(const llvm::APFloat &F); 260 void mangleFunctionEncoding(const FunctionDecl *FD); 261 void mangleName(const NamedDecl *ND); 262 void mangleType(QualType T); 263 void mangleNameOrStandardSubstitution(const NamedDecl *ND); 264 265private: 266 bool mangleSubstitution(const NamedDecl *ND); 267 bool mangleSubstitution(QualType T); 268 bool mangleSubstitution(TemplateName Template); 269 bool mangleSubstitution(uintptr_t Ptr); 270 271 void mangleExistingSubstitution(QualType type); 272 void mangleExistingSubstitution(TemplateName name); 273 274 bool mangleStandardSubstitution(const NamedDecl *ND); 275 276 void addSubstitution(const NamedDecl *ND) { 277 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 278 279 addSubstitution(reinterpret_cast<uintptr_t>(ND)); 280 } 281 void addSubstitution(QualType T); 282 void addSubstitution(TemplateName Template); 283 void addSubstitution(uintptr_t Ptr); 284 285 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier, 286 NamedDecl *firstQualifierLookup, 287 bool recursive = false); 288 void mangleUnresolvedName(NestedNameSpecifier *qualifier, 289 NamedDecl *firstQualifierLookup, 290 DeclarationName name, 291 unsigned KnownArity = UnknownArity); 292 293 void mangleName(const TemplateDecl *TD, 294 const TemplateArgument *TemplateArgs, 295 unsigned NumTemplateArgs); 296 void mangleUnqualifiedName(const NamedDecl *ND) { 297 mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity); 298 } 299 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name, 300 unsigned KnownArity); 301 void mangleUnscopedName(const NamedDecl *ND); 302 void mangleUnscopedTemplateName(const TemplateDecl *ND); 303 void mangleUnscopedTemplateName(TemplateName); 304 void mangleSourceName(const IdentifierInfo *II); 305 void mangleLocalName(const NamedDecl *ND); 306 void mangleLambda(const CXXRecordDecl *Lambda); 307 void mangleNestedName(const NamedDecl *ND, const DeclContext *DC, 308 bool NoFunction=false); 309 void mangleNestedName(const TemplateDecl *TD, 310 const TemplateArgument *TemplateArgs, 311 unsigned NumTemplateArgs); 312 void manglePrefix(NestedNameSpecifier *qualifier); 313 void manglePrefix(const DeclContext *DC, bool NoFunction=false); 314 void manglePrefix(QualType type); 315 void mangleTemplatePrefix(const TemplateDecl *ND); 316 void mangleTemplatePrefix(TemplateName Template); 317 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity); 318 void mangleQualifiers(Qualifiers Quals); 319 void mangleRefQualifier(RefQualifierKind RefQualifier); 320 321 void mangleObjCMethodName(const ObjCMethodDecl *MD); 322 323 // Declare manglers for every type class. 324#define ABSTRACT_TYPE(CLASS, PARENT) 325#define NON_CANONICAL_TYPE(CLASS, PARENT) 326#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T); 327#include "clang/AST/TypeNodes.def" 328 329 void mangleType(const TagType*); 330 void mangleType(TemplateName); 331 void mangleBareFunctionType(const FunctionType *T, 332 bool MangleReturnType); 333 void mangleNeonVectorType(const VectorType *T); 334 335 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value); 336 void mangleMemberExpr(const Expr *base, bool isArrow, 337 NestedNameSpecifier *qualifier, 338 NamedDecl *firstQualifierLookup, 339 DeclarationName name, 340 unsigned knownArity); 341 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity); 342 void mangleCXXCtorType(CXXCtorType T); 343 void mangleCXXDtorType(CXXDtorType T); 344 345 void mangleTemplateArgs(const ASTTemplateArgumentListInfo &TemplateArgs); 346 void mangleTemplateArgs(const TemplateArgument *TemplateArgs, 347 unsigned NumTemplateArgs); 348 void mangleTemplateArgs(const TemplateArgumentList &AL); 349 void mangleTemplateArg(TemplateArgument A); 350 351 void mangleTemplateParameter(unsigned Index); 352 353 void mangleFunctionParam(const ParmVarDecl *parm); 354}; 355 356} 357 358static bool isInCLinkageSpecification(const Decl *D) { 359 D = D->getCanonicalDecl(); 360 for (const DeclContext *DC = getEffectiveDeclContext(D); 361 !DC->isTranslationUnit(); DC = getEffectiveParentContext(DC)) { 362 if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) 363 return Linkage->getLanguage() == LinkageSpecDecl::lang_c; 364 } 365 366 return false; 367} 368 369bool ItaniumMangleContext::shouldMangleDeclName(const NamedDecl *D) { 370 // In C, functions with no attributes never need to be mangled. Fastpath them. 371 if (!getASTContext().getLangOpts().CPlusPlus && !D->hasAttrs()) 372 return false; 373 374 // Any decl can be declared with __asm("foo") on it, and this takes precedence 375 // over all other naming in the .o file. 376 if (D->hasAttr<AsmLabelAttr>()) 377 return true; 378 379 // Clang's "overloadable" attribute extension to C/C++ implies name mangling 380 // (always) as does passing a C++ member function and a function 381 // whose name is not a simple identifier. 382 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D); 383 if (FD && (FD->hasAttr<OverloadableAttr>() || isa<CXXMethodDecl>(FD) || 384 !FD->getDeclName().isIdentifier())) 385 return true; 386 387 // Otherwise, no mangling is done outside C++ mode. 388 if (!getASTContext().getLangOpts().CPlusPlus) 389 return false; 390 391 // Variables at global scope with non-internal linkage are not mangled 392 if (!FD) { 393 const DeclContext *DC = getEffectiveDeclContext(D); 394 // Check for extern variable declared locally. 395 if (DC->isFunctionOrMethod() && D->hasLinkage()) 396 while (!DC->isNamespace() && !DC->isTranslationUnit()) 397 DC = getEffectiveParentContext(DC); 398 if (DC->isTranslationUnit() && D->getLinkage() != InternalLinkage) 399 return false; 400 } 401 402 // Class members are always mangled. 403 if (getEffectiveDeclContext(D)->isRecord()) 404 return true; 405 406 // C functions and "main" are not mangled. 407 if ((FD && FD->isMain()) || isInCLinkageSpecification(D)) 408 return false; 409 410 return true; 411} 412 413void CXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) { 414 // Any decl can be declared with __asm("foo") on it, and this takes precedence 415 // over all other naming in the .o file. 416 if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) { 417 // If we have an asm name, then we use it as the mangling. 418 419 // Adding the prefix can cause problems when one file has a "foo" and 420 // another has a "\01foo". That is known to happen on ELF with the 421 // tricks normally used for producing aliases (PR9177). Fortunately the 422 // llvm mangler on ELF is a nop, so we can just avoid adding the \01 423 // marker. We also avoid adding the marker if this is an alias for an 424 // LLVM intrinsic. 425 StringRef UserLabelPrefix = 426 getASTContext().getTargetInfo().getUserLabelPrefix(); 427 if (!UserLabelPrefix.empty() && !ALA->getLabel().startswith("llvm.")) 428 Out << '\01'; // LLVM IR Marker for __asm("foo") 429 430 Out << ALA->getLabel(); 431 return; 432 } 433 434 // <mangled-name> ::= _Z <encoding> 435 // ::= <data name> 436 // ::= <special-name> 437 Out << Prefix; 438 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) 439 mangleFunctionEncoding(FD); 440 else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 441 mangleName(VD); 442 else 443 mangleName(cast<FieldDecl>(D)); 444} 445 446void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) { 447 // <encoding> ::= <function name> <bare-function-type> 448 mangleName(FD); 449 450 // Don't mangle in the type if this isn't a decl we should typically mangle. 451 if (!Context.shouldMangleDeclName(FD)) 452 return; 453 454 // Whether the mangling of a function type includes the return type depends on 455 // the context and the nature of the function. The rules for deciding whether 456 // the return type is included are: 457 // 458 // 1. Template functions (names or types) have return types encoded, with 459 // the exceptions listed below. 460 // 2. Function types not appearing as part of a function name mangling, 461 // e.g. parameters, pointer types, etc., have return type encoded, with the 462 // exceptions listed below. 463 // 3. Non-template function names do not have return types encoded. 464 // 465 // The exceptions mentioned in (1) and (2) above, for which the return type is 466 // never included, are 467 // 1. Constructors. 468 // 2. Destructors. 469 // 3. Conversion operator functions, e.g. operator int. 470 bool MangleReturnType = false; 471 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) { 472 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) || 473 isa<CXXConversionDecl>(FD))) 474 MangleReturnType = true; 475 476 // Mangle the type of the primary template. 477 FD = PrimaryTemplate->getTemplatedDecl(); 478 } 479 480 mangleBareFunctionType(FD->getType()->getAs<FunctionType>(), 481 MangleReturnType); 482} 483 484static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) { 485 while (isa<LinkageSpecDecl>(DC)) { 486 DC = getEffectiveParentContext(DC); 487 } 488 489 return DC; 490} 491 492/// isStd - Return whether a given namespace is the 'std' namespace. 493static bool isStd(const NamespaceDecl *NS) { 494 if (!IgnoreLinkageSpecDecls(getEffectiveParentContext(NS)) 495 ->isTranslationUnit()) 496 return false; 497 498 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier(); 499 return II && II->isStr("std"); 500} 501 502// isStdNamespace - Return whether a given decl context is a toplevel 'std' 503// namespace. 504static bool isStdNamespace(const DeclContext *DC) { 505 if (!DC->isNamespace()) 506 return false; 507 508 return isStd(cast<NamespaceDecl>(DC)); 509} 510 511static const TemplateDecl * 512isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) { 513 // Check if we have a function template. 514 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)){ 515 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) { 516 TemplateArgs = FD->getTemplateSpecializationArgs(); 517 return TD; 518 } 519 } 520 521 // Check if we have a class template. 522 if (const ClassTemplateSpecializationDecl *Spec = 523 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 524 TemplateArgs = &Spec->getTemplateArgs(); 525 return Spec->getSpecializedTemplate(); 526 } 527 528 return 0; 529} 530 531static bool isLambda(const NamedDecl *ND) { 532 const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(ND); 533 if (!Record) 534 return false; 535 536 return Record->isLambda(); 537} 538 539void CXXNameMangler::mangleName(const NamedDecl *ND) { 540 // <name> ::= <nested-name> 541 // ::= <unscoped-name> 542 // ::= <unscoped-template-name> <template-args> 543 // ::= <local-name> 544 // 545 const DeclContext *DC = getEffectiveDeclContext(ND); 546 547 // If this is an extern variable declared locally, the relevant DeclContext 548 // is that of the containing namespace, or the translation unit. 549 // FIXME: This is a hack; extern variables declared locally should have 550 // a proper semantic declaration context! 551 if (isa<FunctionDecl>(DC) && ND->hasLinkage() && !isLambda(ND)) 552 while (!DC->isNamespace() && !DC->isTranslationUnit()) 553 DC = getEffectiveParentContext(DC); 554 else if (GetLocalClassDecl(ND)) { 555 mangleLocalName(ND); 556 return; 557 } 558 559 DC = IgnoreLinkageSpecDecls(DC); 560 561 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 562 // Check if we have a template. 563 const TemplateArgumentList *TemplateArgs = 0; 564 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 565 mangleUnscopedTemplateName(TD); 566 mangleTemplateArgs(*TemplateArgs); 567 return; 568 } 569 570 mangleUnscopedName(ND); 571 return; 572 } 573 574 if (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)) { 575 mangleLocalName(ND); 576 return; 577 } 578 579 mangleNestedName(ND, DC); 580} 581void CXXNameMangler::mangleName(const TemplateDecl *TD, 582 const TemplateArgument *TemplateArgs, 583 unsigned NumTemplateArgs) { 584 const DeclContext *DC = IgnoreLinkageSpecDecls(getEffectiveDeclContext(TD)); 585 586 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 587 mangleUnscopedTemplateName(TD); 588 mangleTemplateArgs(TemplateArgs, NumTemplateArgs); 589 } else { 590 mangleNestedName(TD, TemplateArgs, NumTemplateArgs); 591 } 592} 593 594void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND) { 595 // <unscoped-name> ::= <unqualified-name> 596 // ::= St <unqualified-name> # ::std:: 597 598 if (isStdNamespace(IgnoreLinkageSpecDecls(getEffectiveDeclContext(ND)))) 599 Out << "St"; 600 601 mangleUnqualifiedName(ND); 602} 603 604void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) { 605 // <unscoped-template-name> ::= <unscoped-name> 606 // ::= <substitution> 607 if (mangleSubstitution(ND)) 608 return; 609 610 // <template-template-param> ::= <template-param> 611 if (const TemplateTemplateParmDecl *TTP 612 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 613 mangleTemplateParameter(TTP->getIndex()); 614 return; 615 } 616 617 mangleUnscopedName(ND->getTemplatedDecl()); 618 addSubstitution(ND); 619} 620 621void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) { 622 // <unscoped-template-name> ::= <unscoped-name> 623 // ::= <substitution> 624 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 625 return mangleUnscopedTemplateName(TD); 626 627 if (mangleSubstitution(Template)) 628 return; 629 630 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 631 assert(Dependent && "Not a dependent template name?"); 632 if (const IdentifierInfo *Id = Dependent->getIdentifier()) 633 mangleSourceName(Id); 634 else 635 mangleOperatorName(Dependent->getOperator(), UnknownArity); 636 637 addSubstitution(Template); 638} 639 640void CXXNameMangler::mangleFloat(const llvm::APFloat &f) { 641 // ABI: 642 // Floating-point literals are encoded using a fixed-length 643 // lowercase hexadecimal string corresponding to the internal 644 // representation (IEEE on Itanium), high-order bytes first, 645 // without leading zeroes. For example: "Lf bf800000 E" is -1.0f 646 // on Itanium. 647 // The 'without leading zeroes' thing seems to be an editorial 648 // mistake; see the discussion on cxx-abi-dev beginning on 649 // 2012-01-16. 650 651 // Our requirements here are just barely weird enough to justify 652 // using a custom algorithm instead of post-processing APInt::toString(). 653 654 llvm::APInt valueBits = f.bitcastToAPInt(); 655 unsigned numCharacters = (valueBits.getBitWidth() + 3) / 4; 656 assert(numCharacters != 0); 657 658 // Allocate a buffer of the right number of characters. 659 llvm::SmallVector<char, 20> buffer; 660 buffer.set_size(numCharacters); 661 662 // Fill the buffer left-to-right. 663 for (unsigned stringIndex = 0; stringIndex != numCharacters; ++stringIndex) { 664 // The bit-index of the next hex digit. 665 unsigned digitBitIndex = 4 * (numCharacters - stringIndex - 1); 666 667 // Project out 4 bits starting at 'digitIndex'. 668 llvm::integerPart hexDigit 669 = valueBits.getRawData()[digitBitIndex / llvm::integerPartWidth]; 670 hexDigit >>= (digitBitIndex % llvm::integerPartWidth); 671 hexDigit &= 0xF; 672 673 // Map that over to a lowercase hex digit. 674 static const char charForHex[16] = { 675 '0', '1', '2', '3', '4', '5', '6', '7', 676 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' 677 }; 678 buffer[stringIndex] = charForHex[hexDigit]; 679 } 680 681 Out.write(buffer.data(), numCharacters); 682} 683 684void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) { 685 if (Value.isSigned() && Value.isNegative()) { 686 Out << 'n'; 687 Value.abs().print(Out, /*signed*/ false); 688 } else { 689 Value.print(Out, /*signed*/ false); 690 } 691} 692 693void CXXNameMangler::mangleNumber(int64_t Number) { 694 // <number> ::= [n] <non-negative decimal integer> 695 if (Number < 0) { 696 Out << 'n'; 697 Number = -Number; 698 } 699 700 Out << Number; 701} 702 703void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) { 704 // <call-offset> ::= h <nv-offset> _ 705 // ::= v <v-offset> _ 706 // <nv-offset> ::= <offset number> # non-virtual base override 707 // <v-offset> ::= <offset number> _ <virtual offset number> 708 // # virtual base override, with vcall offset 709 if (!Virtual) { 710 Out << 'h'; 711 mangleNumber(NonVirtual); 712 Out << '_'; 713 return; 714 } 715 716 Out << 'v'; 717 mangleNumber(NonVirtual); 718 Out << '_'; 719 mangleNumber(Virtual); 720 Out << '_'; 721} 722 723void CXXNameMangler::manglePrefix(QualType type) { 724 if (const TemplateSpecializationType *TST = 725 type->getAs<TemplateSpecializationType>()) { 726 if (!mangleSubstitution(QualType(TST, 0))) { 727 mangleTemplatePrefix(TST->getTemplateName()); 728 729 // FIXME: GCC does not appear to mangle the template arguments when 730 // the template in question is a dependent template name. Should we 731 // emulate that badness? 732 mangleTemplateArgs(TST->getArgs(), TST->getNumArgs()); 733 addSubstitution(QualType(TST, 0)); 734 } 735 } else if (const DependentTemplateSpecializationType *DTST 736 = type->getAs<DependentTemplateSpecializationType>()) { 737 TemplateName Template 738 = getASTContext().getDependentTemplateName(DTST->getQualifier(), 739 DTST->getIdentifier()); 740 mangleTemplatePrefix(Template); 741 742 // FIXME: GCC does not appear to mangle the template arguments when 743 // the template in question is a dependent template name. Should we 744 // emulate that badness? 745 mangleTemplateArgs(DTST->getArgs(), DTST->getNumArgs()); 746 } else { 747 // We use the QualType mangle type variant here because it handles 748 // substitutions. 749 mangleType(type); 750 } 751} 752 753/// Mangle everything prior to the base-unresolved-name in an unresolved-name. 754/// 755/// \param firstQualifierLookup - the entity found by unqualified lookup 756/// for the first name in the qualifier, if this is for a member expression 757/// \param recursive - true if this is being called recursively, 758/// i.e. if there is more prefix "to the right". 759void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier, 760 NamedDecl *firstQualifierLookup, 761 bool recursive) { 762 763 // x, ::x 764 // <unresolved-name> ::= [gs] <base-unresolved-name> 765 766 // T::x / decltype(p)::x 767 // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name> 768 769 // T::N::x /decltype(p)::N::x 770 // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E 771 // <base-unresolved-name> 772 773 // A::x, N::y, A<T>::z; "gs" means leading "::" 774 // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E 775 // <base-unresolved-name> 776 777 switch (qualifier->getKind()) { 778 case NestedNameSpecifier::Global: 779 Out << "gs"; 780 781 // We want an 'sr' unless this is the entire NNS. 782 if (recursive) 783 Out << "sr"; 784 785 // We never want an 'E' here. 786 return; 787 788 case NestedNameSpecifier::Namespace: 789 if (qualifier->getPrefix()) 790 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 791 /*recursive*/ true); 792 else 793 Out << "sr"; 794 mangleSourceName(qualifier->getAsNamespace()->getIdentifier()); 795 break; 796 case NestedNameSpecifier::NamespaceAlias: 797 if (qualifier->getPrefix()) 798 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 799 /*recursive*/ true); 800 else 801 Out << "sr"; 802 mangleSourceName(qualifier->getAsNamespaceAlias()->getIdentifier()); 803 break; 804 805 case NestedNameSpecifier::TypeSpec: 806 case NestedNameSpecifier::TypeSpecWithTemplate: { 807 const Type *type = qualifier->getAsType(); 808 809 // We only want to use an unresolved-type encoding if this is one of: 810 // - a decltype 811 // - a template type parameter 812 // - a template template parameter with arguments 813 // In all of these cases, we should have no prefix. 814 if (qualifier->getPrefix()) { 815 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 816 /*recursive*/ true); 817 } else { 818 // Otherwise, all the cases want this. 819 Out << "sr"; 820 } 821 822 // Only certain other types are valid as prefixes; enumerate them. 823 switch (type->getTypeClass()) { 824 case Type::Builtin: 825 case Type::Complex: 826 case Type::Pointer: 827 case Type::BlockPointer: 828 case Type::LValueReference: 829 case Type::RValueReference: 830 case Type::MemberPointer: 831 case Type::ConstantArray: 832 case Type::IncompleteArray: 833 case Type::VariableArray: 834 case Type::DependentSizedArray: 835 case Type::DependentSizedExtVector: 836 case Type::Vector: 837 case Type::ExtVector: 838 case Type::FunctionProto: 839 case Type::FunctionNoProto: 840 case Type::Enum: 841 case Type::Paren: 842 case Type::Elaborated: 843 case Type::Attributed: 844 case Type::Auto: 845 case Type::PackExpansion: 846 case Type::ObjCObject: 847 case Type::ObjCInterface: 848 case Type::ObjCObjectPointer: 849 case Type::Atomic: 850 llvm_unreachable("type is illegal as a nested name specifier"); 851 852 case Type::SubstTemplateTypeParmPack: 853 // FIXME: not clear how to mangle this! 854 // template <class T...> class A { 855 // template <class U...> void foo(decltype(T::foo(U())) x...); 856 // }; 857 Out << "_SUBSTPACK_"; 858 break; 859 860 // <unresolved-type> ::= <template-param> 861 // ::= <decltype> 862 // ::= <template-template-param> <template-args> 863 // (this last is not official yet) 864 case Type::TypeOfExpr: 865 case Type::TypeOf: 866 case Type::Decltype: 867 case Type::TemplateTypeParm: 868 case Type::UnaryTransform: 869 case Type::SubstTemplateTypeParm: 870 unresolvedType: 871 assert(!qualifier->getPrefix()); 872 873 // We only get here recursively if we're followed by identifiers. 874 if (recursive) Out << 'N'; 875 876 // This seems to do everything we want. It's not really 877 // sanctioned for a substituted template parameter, though. 878 mangleType(QualType(type, 0)); 879 880 // We never want to print 'E' directly after an unresolved-type, 881 // so we return directly. 882 return; 883 884 case Type::Typedef: 885 mangleSourceName(cast<TypedefType>(type)->getDecl()->getIdentifier()); 886 break; 887 888 case Type::UnresolvedUsing: 889 mangleSourceName(cast<UnresolvedUsingType>(type)->getDecl() 890 ->getIdentifier()); 891 break; 892 893 case Type::Record: 894 mangleSourceName(cast<RecordType>(type)->getDecl()->getIdentifier()); 895 break; 896 897 case Type::TemplateSpecialization: { 898 const TemplateSpecializationType *tst 899 = cast<TemplateSpecializationType>(type); 900 TemplateName name = tst->getTemplateName(); 901 switch (name.getKind()) { 902 case TemplateName::Template: 903 case TemplateName::QualifiedTemplate: { 904 TemplateDecl *temp = name.getAsTemplateDecl(); 905 906 // If the base is a template template parameter, this is an 907 // unresolved type. 908 assert(temp && "no template for template specialization type"); 909 if (isa<TemplateTemplateParmDecl>(temp)) goto unresolvedType; 910 911 mangleSourceName(temp->getIdentifier()); 912 break; 913 } 914 915 case TemplateName::OverloadedTemplate: 916 case TemplateName::DependentTemplate: 917 llvm_unreachable("invalid base for a template specialization type"); 918 919 case TemplateName::SubstTemplateTemplateParm: { 920 SubstTemplateTemplateParmStorage *subst 921 = name.getAsSubstTemplateTemplateParm(); 922 mangleExistingSubstitution(subst->getReplacement()); 923 break; 924 } 925 926 case TemplateName::SubstTemplateTemplateParmPack: { 927 // FIXME: not clear how to mangle this! 928 // template <template <class U> class T...> class A { 929 // template <class U...> void foo(decltype(T<U>::foo) x...); 930 // }; 931 Out << "_SUBSTPACK_"; 932 break; 933 } 934 } 935 936 mangleTemplateArgs(tst->getArgs(), tst->getNumArgs()); 937 break; 938 } 939 940 case Type::InjectedClassName: 941 mangleSourceName(cast<InjectedClassNameType>(type)->getDecl() 942 ->getIdentifier()); 943 break; 944 945 case Type::DependentName: 946 mangleSourceName(cast<DependentNameType>(type)->getIdentifier()); 947 break; 948 949 case Type::DependentTemplateSpecialization: { 950 const DependentTemplateSpecializationType *tst 951 = cast<DependentTemplateSpecializationType>(type); 952 mangleSourceName(tst->getIdentifier()); 953 mangleTemplateArgs(tst->getArgs(), tst->getNumArgs()); 954 break; 955 } 956 } 957 break; 958 } 959 960 case NestedNameSpecifier::Identifier: 961 // Member expressions can have these without prefixes. 962 if (qualifier->getPrefix()) { 963 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 964 /*recursive*/ true); 965 } else if (firstQualifierLookup) { 966 967 // Try to make a proper qualifier out of the lookup result, and 968 // then just recurse on that. 969 NestedNameSpecifier *newQualifier; 970 if (TypeDecl *typeDecl = dyn_cast<TypeDecl>(firstQualifierLookup)) { 971 QualType type = getASTContext().getTypeDeclType(typeDecl); 972 973 // Pretend we had a different nested name specifier. 974 newQualifier = NestedNameSpecifier::Create(getASTContext(), 975 /*prefix*/ 0, 976 /*template*/ false, 977 type.getTypePtr()); 978 } else if (NamespaceDecl *nspace = 979 dyn_cast<NamespaceDecl>(firstQualifierLookup)) { 980 newQualifier = NestedNameSpecifier::Create(getASTContext(), 981 /*prefix*/ 0, 982 nspace); 983 } else if (NamespaceAliasDecl *alias = 984 dyn_cast<NamespaceAliasDecl>(firstQualifierLookup)) { 985 newQualifier = NestedNameSpecifier::Create(getASTContext(), 986 /*prefix*/ 0, 987 alias); 988 } else { 989 // No sensible mangling to do here. 990 newQualifier = 0; 991 } 992 993 if (newQualifier) 994 return mangleUnresolvedPrefix(newQualifier, /*lookup*/ 0, recursive); 995 996 } else { 997 Out << "sr"; 998 } 999 1000 mangleSourceName(qualifier->getAsIdentifier()); 1001 break; 1002 } 1003 1004 // If this was the innermost part of the NNS, and we fell out to 1005 // here, append an 'E'. 1006 if (!recursive) 1007 Out << 'E'; 1008} 1009 1010/// Mangle an unresolved-name, which is generally used for names which 1011/// weren't resolved to specific entities. 1012void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *qualifier, 1013 NamedDecl *firstQualifierLookup, 1014 DeclarationName name, 1015 unsigned knownArity) { 1016 if (qualifier) mangleUnresolvedPrefix(qualifier, firstQualifierLookup); 1017 mangleUnqualifiedName(0, name, knownArity); 1018} 1019 1020static const FieldDecl *FindFirstNamedDataMember(const RecordDecl *RD) { 1021 assert(RD->isAnonymousStructOrUnion() && 1022 "Expected anonymous struct or union!"); 1023 1024 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 1025 I != E; ++I) { 1026 if (I->getIdentifier()) 1027 return *I; 1028 1029 if (const RecordType *RT = I->getType()->getAs<RecordType>()) 1030 if (const FieldDecl *NamedDataMember = 1031 FindFirstNamedDataMember(RT->getDecl())) 1032 return NamedDataMember; 1033 } 1034 1035 // We didn't find a named data member. 1036 return 0; 1037} 1038 1039void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND, 1040 DeclarationName Name, 1041 unsigned KnownArity) { 1042 // <unqualified-name> ::= <operator-name> 1043 // ::= <ctor-dtor-name> 1044 // ::= <source-name> 1045 switch (Name.getNameKind()) { 1046 case DeclarationName::Identifier: { 1047 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) { 1048 // We must avoid conflicts between internally- and externally- 1049 // linked variable and function declaration names in the same TU: 1050 // void test() { extern void foo(); } 1051 // static void foo(); 1052 // This naming convention is the same as that followed by GCC, 1053 // though it shouldn't actually matter. 1054 if (ND && ND->getLinkage() == InternalLinkage && 1055 getEffectiveDeclContext(ND)->isFileContext()) 1056 Out << 'L'; 1057 1058 mangleSourceName(II); 1059 break; 1060 } 1061 1062 // Otherwise, an anonymous entity. We must have a declaration. 1063 assert(ND && "mangling empty name without declaration"); 1064 1065 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 1066 if (NS->isAnonymousNamespace()) { 1067 // This is how gcc mangles these names. 1068 Out << "12_GLOBAL__N_1"; 1069 break; 1070 } 1071 } 1072 1073 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { 1074 // We must have an anonymous union or struct declaration. 1075 const RecordDecl *RD = 1076 cast<RecordDecl>(VD->getType()->getAs<RecordType>()->getDecl()); 1077 1078 // Itanium C++ ABI 5.1.2: 1079 // 1080 // For the purposes of mangling, the name of an anonymous union is 1081 // considered to be the name of the first named data member found by a 1082 // pre-order, depth-first, declaration-order walk of the data members of 1083 // the anonymous union. If there is no such data member (i.e., if all of 1084 // the data members in the union are unnamed), then there is no way for 1085 // a program to refer to the anonymous union, and there is therefore no 1086 // need to mangle its name. 1087 const FieldDecl *FD = FindFirstNamedDataMember(RD); 1088 1089 // It's actually possible for various reasons for us to get here 1090 // with an empty anonymous struct / union. Fortunately, it 1091 // doesn't really matter what name we generate. 1092 if (!FD) break; 1093 assert(FD->getIdentifier() && "Data member name isn't an identifier!"); 1094 1095 mangleSourceName(FD->getIdentifier()); 1096 break; 1097 } 1098 1099 // We must have an anonymous struct. 1100 const TagDecl *TD = cast<TagDecl>(ND); 1101 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) { 1102 assert(TD->getDeclContext() == D->getDeclContext() && 1103 "Typedef should not be in another decl context!"); 1104 assert(D->getDeclName().getAsIdentifierInfo() && 1105 "Typedef was not named!"); 1106 mangleSourceName(D->getDeclName().getAsIdentifierInfo()); 1107 break; 1108 } 1109 1110 // <unnamed-type-name> ::= <closure-type-name> 1111 // 1112 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _ 1113 // <lambda-sig> ::= <parameter-type>+ # Parameter types or 'v' for 'void'. 1114 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) { 1115 if (Record->isLambda() && Record->getLambdaManglingNumber()) { 1116 mangleLambda(Record); 1117 break; 1118 } 1119 } 1120 1121 int UnnamedMangle = Context.getASTContext().getUnnamedTagManglingNumber(TD); 1122 if (UnnamedMangle != -1) { 1123 Out << "Ut"; 1124 if (UnnamedMangle != 0) 1125 Out << llvm::utostr(UnnamedMangle - 1); 1126 Out << '_'; 1127 break; 1128 } 1129 1130 //assert(cast<RecordDecl>(RD)->isAnonymousStructOrUnion() && "Don't mangle unnamed things as " 1131 // "anonymous things"); 1132 1133 // Get a unique id for the anonymous struct. 1134 uint64_t AnonStructId = Context.getAnonymousStructId(TD); 1135 1136 // Mangle it as a source name in the form 1137 // [n] $_<id> 1138 // where n is the length of the string. 1139 SmallString<8> Str; 1140 Str += "$_"; 1141 Str += llvm::utostr(AnonStructId); 1142 1143 Out << Str.size(); 1144 Out << Str.str(); 1145 break; 1146 } 1147 1148 case DeclarationName::ObjCZeroArgSelector: 1149 case DeclarationName::ObjCOneArgSelector: 1150 case DeclarationName::ObjCMultiArgSelector: 1151 llvm_unreachable("Can't mangle Objective-C selector names here!"); 1152 1153 case DeclarationName::CXXConstructorName: 1154 if (ND == Structor) 1155 // If the named decl is the C++ constructor we're mangling, use the type 1156 // we were given. 1157 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType)); 1158 else 1159 // Otherwise, use the complete constructor name. This is relevant if a 1160 // class with a constructor is declared within a constructor. 1161 mangleCXXCtorType(Ctor_Complete); 1162 break; 1163 1164 case DeclarationName::CXXDestructorName: 1165 if (ND == Structor) 1166 // If the named decl is the C++ destructor we're mangling, use the type we 1167 // were given. 1168 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType)); 1169 else 1170 // Otherwise, use the complete destructor name. This is relevant if a 1171 // class with a destructor is declared within a destructor. 1172 mangleCXXDtorType(Dtor_Complete); 1173 break; 1174 1175 case DeclarationName::CXXConversionFunctionName: 1176 // <operator-name> ::= cv <type> # (cast) 1177 Out << "cv"; 1178 mangleType(Name.getCXXNameType()); 1179 break; 1180 1181 case DeclarationName::CXXOperatorName: { 1182 unsigned Arity; 1183 if (ND) { 1184 Arity = cast<FunctionDecl>(ND)->getNumParams(); 1185 1186 // If we have a C++ member function, we need to include the 'this' pointer. 1187 // FIXME: This does not make sense for operators that are static, but their 1188 // names stay the same regardless of the arity (operator new for instance). 1189 if (isa<CXXMethodDecl>(ND)) 1190 Arity++; 1191 } else 1192 Arity = KnownArity; 1193 1194 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity); 1195 break; 1196 } 1197 1198 case DeclarationName::CXXLiteralOperatorName: 1199 // FIXME: This mangling is not yet official. 1200 Out << "li"; 1201 mangleSourceName(Name.getCXXLiteralIdentifier()); 1202 break; 1203 1204 case DeclarationName::CXXUsingDirective: 1205 llvm_unreachable("Can't mangle a using directive name!"); 1206 } 1207} 1208 1209void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) { 1210 // <source-name> ::= <positive length number> <identifier> 1211 // <number> ::= [n] <non-negative decimal integer> 1212 // <identifier> ::= <unqualified source code identifier> 1213 Out << II->getLength() << II->getName(); 1214} 1215 1216void CXXNameMangler::mangleNestedName(const NamedDecl *ND, 1217 const DeclContext *DC, 1218 bool NoFunction) { 1219 // <nested-name> 1220 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E 1221 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix> 1222 // <template-args> E 1223 1224 Out << 'N'; 1225 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) { 1226 mangleQualifiers(Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 1227 mangleRefQualifier(Method->getRefQualifier()); 1228 } 1229 1230 // Check if we have a template. 1231 const TemplateArgumentList *TemplateArgs = 0; 1232 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 1233 mangleTemplatePrefix(TD); 1234 mangleTemplateArgs(*TemplateArgs); 1235 } 1236 else { 1237 manglePrefix(DC, NoFunction); 1238 mangleUnqualifiedName(ND); 1239 } 1240 1241 Out << 'E'; 1242} 1243void CXXNameMangler::mangleNestedName(const TemplateDecl *TD, 1244 const TemplateArgument *TemplateArgs, 1245 unsigned NumTemplateArgs) { 1246 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E 1247 1248 Out << 'N'; 1249 1250 mangleTemplatePrefix(TD); 1251 mangleTemplateArgs(TemplateArgs, NumTemplateArgs); 1252 1253 Out << 'E'; 1254} 1255 1256void CXXNameMangler::mangleLocalName(const NamedDecl *ND) { 1257 // <local-name> := Z <function encoding> E <entity name> [<discriminator>] 1258 // := Z <function encoding> E s [<discriminator>] 1259 // <local-name> := Z <function encoding> E d [ <parameter number> ] 1260 // _ <entity name> 1261 // <discriminator> := _ <non-negative number> 1262 const DeclContext *DC = getEffectiveDeclContext(ND); 1263 if (isa<ObjCMethodDecl>(DC) && isa<FunctionDecl>(ND)) { 1264 // Don't add objc method name mangling to locally declared function 1265 mangleUnqualifiedName(ND); 1266 return; 1267 } 1268 1269 Out << 'Z'; 1270 1271 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC)) { 1272 mangleObjCMethodName(MD); 1273 } else if (const CXXRecordDecl *RD = GetLocalClassDecl(ND)) { 1274 mangleFunctionEncoding(cast<FunctionDecl>(getEffectiveDeclContext(RD))); 1275 Out << 'E'; 1276 1277 // The parameter number is omitted for the last parameter, 0 for the 1278 // second-to-last parameter, 1 for the third-to-last parameter, etc. The 1279 // <entity name> will of course contain a <closure-type-name>: Its 1280 // numbering will be local to the particular argument in which it appears 1281 // -- other default arguments do not affect its encoding. 1282 bool SkipDiscriminator = false; 1283 if (RD->isLambda()) { 1284 if (const ParmVarDecl *Parm 1285 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl())) { 1286 if (const FunctionDecl *Func 1287 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) { 1288 Out << 'd'; 1289 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex(); 1290 if (Num > 1) 1291 mangleNumber(Num - 2); 1292 Out << '_'; 1293 SkipDiscriminator = true; 1294 } 1295 } 1296 } 1297 1298 // Mangle the name relative to the closest enclosing function. 1299 if (ND == RD) // equality ok because RD derived from ND above 1300 mangleUnqualifiedName(ND); 1301 else 1302 mangleNestedName(ND, DC, true /*NoFunction*/); 1303 1304 if (!SkipDiscriminator) { 1305 unsigned disc; 1306 if (Context.getNextDiscriminator(RD, disc)) { 1307 if (disc < 10) 1308 Out << '_' << disc; 1309 else 1310 Out << "__" << disc << '_'; 1311 } 1312 } 1313 1314 return; 1315 } 1316 else 1317 mangleFunctionEncoding(cast<FunctionDecl>(DC)); 1318 1319 Out << 'E'; 1320 mangleUnqualifiedName(ND); 1321} 1322 1323void CXXNameMangler::mangleLambda(const CXXRecordDecl *Lambda) { 1324 // If the context of a closure type is an initializer for a class member 1325 // (static or nonstatic), it is encoded in a qualified name with a final 1326 // <prefix> of the form: 1327 // 1328 // <data-member-prefix> := <member source-name> M 1329 // 1330 // Technically, the data-member-prefix is part of the <prefix>. However, 1331 // since a closure type will always be mangled with a prefix, it's easier 1332 // to emit that last part of the prefix here. 1333 if (Decl *Context = Lambda->getLambdaContextDecl()) { 1334 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) && 1335 Context->getDeclContext()->isRecord()) { 1336 if (const IdentifierInfo *Name 1337 = cast<NamedDecl>(Context)->getIdentifier()) { 1338 mangleSourceName(Name); 1339 Out << 'M'; 1340 } 1341 } 1342 } 1343 1344 Out << "Ul"; 1345 const FunctionProtoType *Proto = Lambda->getLambdaTypeInfo()->getType()-> 1346 getAs<FunctionProtoType>(); 1347 mangleBareFunctionType(Proto, /*MangleReturnType=*/false); 1348 Out << "E"; 1349 1350 // The number is omitted for the first closure type with a given 1351 // <lambda-sig> in a given context; it is n-2 for the nth closure type 1352 // (in lexical order) with that same <lambda-sig> and context. 1353 // 1354 // The AST keeps track of the number for us. 1355 unsigned Number = Lambda->getLambdaManglingNumber(); 1356 assert(Number > 0 && "Lambda should be mangled as an unnamed class"); 1357 if (Number > 1) 1358 mangleNumber(Number - 2); 1359 Out << '_'; 1360} 1361 1362void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) { 1363 switch (qualifier->getKind()) { 1364 case NestedNameSpecifier::Global: 1365 // nothing 1366 return; 1367 1368 case NestedNameSpecifier::Namespace: 1369 mangleName(qualifier->getAsNamespace()); 1370 return; 1371 1372 case NestedNameSpecifier::NamespaceAlias: 1373 mangleName(qualifier->getAsNamespaceAlias()->getNamespace()); 1374 return; 1375 1376 case NestedNameSpecifier::TypeSpec: 1377 case NestedNameSpecifier::TypeSpecWithTemplate: 1378 manglePrefix(QualType(qualifier->getAsType(), 0)); 1379 return; 1380 1381 case NestedNameSpecifier::Identifier: 1382 // Member expressions can have these without prefixes, but that 1383 // should end up in mangleUnresolvedPrefix instead. 1384 assert(qualifier->getPrefix()); 1385 manglePrefix(qualifier->getPrefix()); 1386 1387 mangleSourceName(qualifier->getAsIdentifier()); 1388 return; 1389 } 1390 1391 llvm_unreachable("unexpected nested name specifier"); 1392} 1393 1394void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) { 1395 // <prefix> ::= <prefix> <unqualified-name> 1396 // ::= <template-prefix> <template-args> 1397 // ::= <template-param> 1398 // ::= # empty 1399 // ::= <substitution> 1400 1401 DC = IgnoreLinkageSpecDecls(DC); 1402 1403 if (DC->isTranslationUnit()) 1404 return; 1405 1406 if (const BlockDecl *Block = dyn_cast<BlockDecl>(DC)) { 1407 manglePrefix(getEffectiveParentContext(DC), NoFunction); 1408 SmallString<64> Name; 1409 llvm::raw_svector_ostream NameStream(Name); 1410 Context.mangleBlock(Block, NameStream); 1411 NameStream.flush(); 1412 Out << Name.size() << Name; 1413 return; 1414 } 1415 1416 const NamedDecl *ND = cast<NamedDecl>(DC); 1417 if (mangleSubstitution(ND)) 1418 return; 1419 1420 // Check if we have a template. 1421 const TemplateArgumentList *TemplateArgs = 0; 1422 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 1423 mangleTemplatePrefix(TD); 1424 mangleTemplateArgs(*TemplateArgs); 1425 } 1426 else if(NoFunction && (isa<FunctionDecl>(ND) || isa<ObjCMethodDecl>(ND))) 1427 return; 1428 else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(ND)) 1429 mangleObjCMethodName(Method); 1430 else { 1431 manglePrefix(getEffectiveDeclContext(ND), NoFunction); 1432 mangleUnqualifiedName(ND); 1433 } 1434 1435 addSubstitution(ND); 1436} 1437 1438void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) { 1439 // <template-prefix> ::= <prefix> <template unqualified-name> 1440 // ::= <template-param> 1441 // ::= <substitution> 1442 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 1443 return mangleTemplatePrefix(TD); 1444 1445 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName()) 1446 manglePrefix(Qualified->getQualifier()); 1447 1448 if (OverloadedTemplateStorage *Overloaded 1449 = Template.getAsOverloadedTemplate()) { 1450 mangleUnqualifiedName(0, (*Overloaded->begin())->getDeclName(), 1451 UnknownArity); 1452 return; 1453 } 1454 1455 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 1456 assert(Dependent && "Unknown template name kind?"); 1457 manglePrefix(Dependent->getQualifier()); 1458 mangleUnscopedTemplateName(Template); 1459} 1460 1461void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) { 1462 // <template-prefix> ::= <prefix> <template unqualified-name> 1463 // ::= <template-param> 1464 // ::= <substitution> 1465 // <template-template-param> ::= <template-param> 1466 // <substitution> 1467 1468 if (mangleSubstitution(ND)) 1469 return; 1470 1471 // <template-template-param> ::= <template-param> 1472 if (const TemplateTemplateParmDecl *TTP 1473 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 1474 mangleTemplateParameter(TTP->getIndex()); 1475 return; 1476 } 1477 1478 manglePrefix(getEffectiveDeclContext(ND)); 1479 mangleUnqualifiedName(ND->getTemplatedDecl()); 1480 addSubstitution(ND); 1481} 1482 1483/// Mangles a template name under the production <type>. Required for 1484/// template template arguments. 1485/// <type> ::= <class-enum-type> 1486/// ::= <template-param> 1487/// ::= <substitution> 1488void CXXNameMangler::mangleType(TemplateName TN) { 1489 if (mangleSubstitution(TN)) 1490 return; 1491 1492 TemplateDecl *TD = 0; 1493 1494 switch (TN.getKind()) { 1495 case TemplateName::QualifiedTemplate: 1496 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl(); 1497 goto HaveDecl; 1498 1499 case TemplateName::Template: 1500 TD = TN.getAsTemplateDecl(); 1501 goto HaveDecl; 1502 1503 HaveDecl: 1504 if (isa<TemplateTemplateParmDecl>(TD)) 1505 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex()); 1506 else 1507 mangleName(TD); 1508 break; 1509 1510 case TemplateName::OverloadedTemplate: 1511 llvm_unreachable("can't mangle an overloaded template name as a <type>"); 1512 1513 case TemplateName::DependentTemplate: { 1514 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName(); 1515 assert(Dependent->isIdentifier()); 1516 1517 // <class-enum-type> ::= <name> 1518 // <name> ::= <nested-name> 1519 mangleUnresolvedPrefix(Dependent->getQualifier(), 0); 1520 mangleSourceName(Dependent->getIdentifier()); 1521 break; 1522 } 1523 1524 case TemplateName::SubstTemplateTemplateParm: { 1525 // Substituted template parameters are mangled as the substituted 1526 // template. This will check for the substitution twice, which is 1527 // fine, but we have to return early so that we don't try to *add* 1528 // the substitution twice. 1529 SubstTemplateTemplateParmStorage *subst 1530 = TN.getAsSubstTemplateTemplateParm(); 1531 mangleType(subst->getReplacement()); 1532 return; 1533 } 1534 1535 case TemplateName::SubstTemplateTemplateParmPack: { 1536 // FIXME: not clear how to mangle this! 1537 // template <template <class> class T...> class A { 1538 // template <template <class> class U...> void foo(B<T,U> x...); 1539 // }; 1540 Out << "_SUBSTPACK_"; 1541 break; 1542 } 1543 } 1544 1545 addSubstitution(TN); 1546} 1547 1548void 1549CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) { 1550 switch (OO) { 1551 // <operator-name> ::= nw # new 1552 case OO_New: Out << "nw"; break; 1553 // ::= na # new[] 1554 case OO_Array_New: Out << "na"; break; 1555 // ::= dl # delete 1556 case OO_Delete: Out << "dl"; break; 1557 // ::= da # delete[] 1558 case OO_Array_Delete: Out << "da"; break; 1559 // ::= ps # + (unary) 1560 // ::= pl # + (binary or unknown) 1561 case OO_Plus: 1562 Out << (Arity == 1? "ps" : "pl"); break; 1563 // ::= ng # - (unary) 1564 // ::= mi # - (binary or unknown) 1565 case OO_Minus: 1566 Out << (Arity == 1? "ng" : "mi"); break; 1567 // ::= ad # & (unary) 1568 // ::= an # & (binary or unknown) 1569 case OO_Amp: 1570 Out << (Arity == 1? "ad" : "an"); break; 1571 // ::= de # * (unary) 1572 // ::= ml # * (binary or unknown) 1573 case OO_Star: 1574 // Use binary when unknown. 1575 Out << (Arity == 1? "de" : "ml"); break; 1576 // ::= co # ~ 1577 case OO_Tilde: Out << "co"; break; 1578 // ::= dv # / 1579 case OO_Slash: Out << "dv"; break; 1580 // ::= rm # % 1581 case OO_Percent: Out << "rm"; break; 1582 // ::= or # | 1583 case OO_Pipe: Out << "or"; break; 1584 // ::= eo # ^ 1585 case OO_Caret: Out << "eo"; break; 1586 // ::= aS # = 1587 case OO_Equal: Out << "aS"; break; 1588 // ::= pL # += 1589 case OO_PlusEqual: Out << "pL"; break; 1590 // ::= mI # -= 1591 case OO_MinusEqual: Out << "mI"; break; 1592 // ::= mL # *= 1593 case OO_StarEqual: Out << "mL"; break; 1594 // ::= dV # /= 1595 case OO_SlashEqual: Out << "dV"; break; 1596 // ::= rM # %= 1597 case OO_PercentEqual: Out << "rM"; break; 1598 // ::= aN # &= 1599 case OO_AmpEqual: Out << "aN"; break; 1600 // ::= oR # |= 1601 case OO_PipeEqual: Out << "oR"; break; 1602 // ::= eO # ^= 1603 case OO_CaretEqual: Out << "eO"; break; 1604 // ::= ls # << 1605 case OO_LessLess: Out << "ls"; break; 1606 // ::= rs # >> 1607 case OO_GreaterGreater: Out << "rs"; break; 1608 // ::= lS # <<= 1609 case OO_LessLessEqual: Out << "lS"; break; 1610 // ::= rS # >>= 1611 case OO_GreaterGreaterEqual: Out << "rS"; break; 1612 // ::= eq # == 1613 case OO_EqualEqual: Out << "eq"; break; 1614 // ::= ne # != 1615 case OO_ExclaimEqual: Out << "ne"; break; 1616 // ::= lt # < 1617 case OO_Less: Out << "lt"; break; 1618 // ::= gt # > 1619 case OO_Greater: Out << "gt"; break; 1620 // ::= le # <= 1621 case OO_LessEqual: Out << "le"; break; 1622 // ::= ge # >= 1623 case OO_GreaterEqual: Out << "ge"; break; 1624 // ::= nt # ! 1625 case OO_Exclaim: Out << "nt"; break; 1626 // ::= aa # && 1627 case OO_AmpAmp: Out << "aa"; break; 1628 // ::= oo # || 1629 case OO_PipePipe: Out << "oo"; break; 1630 // ::= pp # ++ 1631 case OO_PlusPlus: Out << "pp"; break; 1632 // ::= mm # -- 1633 case OO_MinusMinus: Out << "mm"; break; 1634 // ::= cm # , 1635 case OO_Comma: Out << "cm"; break; 1636 // ::= pm # ->* 1637 case OO_ArrowStar: Out << "pm"; break; 1638 // ::= pt # -> 1639 case OO_Arrow: Out << "pt"; break; 1640 // ::= cl # () 1641 case OO_Call: Out << "cl"; break; 1642 // ::= ix # [] 1643 case OO_Subscript: Out << "ix"; break; 1644 1645 // ::= qu # ? 1646 // The conditional operator can't be overloaded, but we still handle it when 1647 // mangling expressions. 1648 case OO_Conditional: Out << "qu"; break; 1649 1650 case OO_None: 1651 case NUM_OVERLOADED_OPERATORS: 1652 llvm_unreachable("Not an overloaded operator"); 1653 } 1654} 1655 1656void CXXNameMangler::mangleQualifiers(Qualifiers Quals) { 1657 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const 1658 if (Quals.hasRestrict()) 1659 Out << 'r'; 1660 if (Quals.hasVolatile()) 1661 Out << 'V'; 1662 if (Quals.hasConst()) 1663 Out << 'K'; 1664 1665 if (Quals.hasAddressSpace()) { 1666 // Extension: 1667 // 1668 // <type> ::= U <address-space-number> 1669 // 1670 // where <address-space-number> is a source name consisting of 'AS' 1671 // followed by the address space <number>. 1672 SmallString<64> ASString; 1673 ASString = "AS" + llvm::utostr_32(Quals.getAddressSpace()); 1674 Out << 'U' << ASString.size() << ASString; 1675 } 1676 1677 StringRef LifetimeName; 1678 switch (Quals.getObjCLifetime()) { 1679 // Objective-C ARC Extension: 1680 // 1681 // <type> ::= U "__strong" 1682 // <type> ::= U "__weak" 1683 // <type> ::= U "__autoreleasing" 1684 case Qualifiers::OCL_None: 1685 break; 1686 1687 case Qualifiers::OCL_Weak: 1688 LifetimeName = "__weak"; 1689 break; 1690 1691 case Qualifiers::OCL_Strong: 1692 LifetimeName = "__strong"; 1693 break; 1694 1695 case Qualifiers::OCL_Autoreleasing: 1696 LifetimeName = "__autoreleasing"; 1697 break; 1698 1699 case Qualifiers::OCL_ExplicitNone: 1700 // The __unsafe_unretained qualifier is *not* mangled, so that 1701 // __unsafe_unretained types in ARC produce the same manglings as the 1702 // equivalent (but, naturally, unqualified) types in non-ARC, providing 1703 // better ABI compatibility. 1704 // 1705 // It's safe to do this because unqualified 'id' won't show up 1706 // in any type signatures that need to be mangled. 1707 break; 1708 } 1709 if (!LifetimeName.empty()) 1710 Out << 'U' << LifetimeName.size() << LifetimeName; 1711} 1712 1713void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) { 1714 // <ref-qualifier> ::= R # lvalue reference 1715 // ::= O # rvalue-reference 1716 // Proposal to Itanium C++ ABI list on 1/26/11 1717 switch (RefQualifier) { 1718 case RQ_None: 1719 break; 1720 1721 case RQ_LValue: 1722 Out << 'R'; 1723 break; 1724 1725 case RQ_RValue: 1726 Out << 'O'; 1727 break; 1728 } 1729} 1730 1731void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) { 1732 Context.mangleObjCMethodName(MD, Out); 1733} 1734 1735void CXXNameMangler::mangleType(QualType T) { 1736 // If our type is instantiation-dependent but not dependent, we mangle 1737 // it as it was written in the source, removing any top-level sugar. 1738 // Otherwise, use the canonical type. 1739 // 1740 // FIXME: This is an approximation of the instantiation-dependent name 1741 // mangling rules, since we should really be using the type as written and 1742 // augmented via semantic analysis (i.e., with implicit conversions and 1743 // default template arguments) for any instantiation-dependent type. 1744 // Unfortunately, that requires several changes to our AST: 1745 // - Instantiation-dependent TemplateSpecializationTypes will need to be 1746 // uniqued, so that we can handle substitutions properly 1747 // - Default template arguments will need to be represented in the 1748 // TemplateSpecializationType, since they need to be mangled even though 1749 // they aren't written. 1750 // - Conversions on non-type template arguments need to be expressed, since 1751 // they can affect the mangling of sizeof/alignof. 1752 if (!T->isInstantiationDependentType() || T->isDependentType()) 1753 T = T.getCanonicalType(); 1754 else { 1755 // Desugar any types that are purely sugar. 1756 do { 1757 // Don't desugar through template specialization types that aren't 1758 // type aliases. We need to mangle the template arguments as written. 1759 if (const TemplateSpecializationType *TST 1760 = dyn_cast<TemplateSpecializationType>(T)) 1761 if (!TST->isTypeAlias()) 1762 break; 1763 1764 QualType Desugared 1765 = T.getSingleStepDesugaredType(Context.getASTContext()); 1766 if (Desugared == T) 1767 break; 1768 1769 T = Desugared; 1770 } while (true); 1771 } 1772 SplitQualType split = T.split(); 1773 Qualifiers quals = split.Quals; 1774 const Type *ty = split.Ty; 1775 1776 bool isSubstitutable = quals || !isa<BuiltinType>(T); 1777 if (isSubstitutable && mangleSubstitution(T)) 1778 return; 1779 1780 // If we're mangling a qualified array type, push the qualifiers to 1781 // the element type. 1782 if (quals && isa<ArrayType>(T)) { 1783 ty = Context.getASTContext().getAsArrayType(T); 1784 quals = Qualifiers(); 1785 1786 // Note that we don't update T: we want to add the 1787 // substitution at the original type. 1788 } 1789 1790 if (quals) { 1791 mangleQualifiers(quals); 1792 // Recurse: even if the qualified type isn't yet substitutable, 1793 // the unqualified type might be. 1794 mangleType(QualType(ty, 0)); 1795 } else { 1796 switch (ty->getTypeClass()) { 1797#define ABSTRACT_TYPE(CLASS, PARENT) 1798#define NON_CANONICAL_TYPE(CLASS, PARENT) \ 1799 case Type::CLASS: \ 1800 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \ 1801 return; 1802#define TYPE(CLASS, PARENT) \ 1803 case Type::CLASS: \ 1804 mangleType(static_cast<const CLASS##Type*>(ty)); \ 1805 break; 1806#include "clang/AST/TypeNodes.def" 1807 } 1808 } 1809 1810 // Add the substitution. 1811 if (isSubstitutable) 1812 addSubstitution(T); 1813} 1814 1815void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) { 1816 if (!mangleStandardSubstitution(ND)) 1817 mangleName(ND); 1818} 1819 1820void CXXNameMangler::mangleType(const BuiltinType *T) { 1821 // <type> ::= <builtin-type> 1822 // <builtin-type> ::= v # void 1823 // ::= w # wchar_t 1824 // ::= b # bool 1825 // ::= c # char 1826 // ::= a # signed char 1827 // ::= h # unsigned char 1828 // ::= s # short 1829 // ::= t # unsigned short 1830 // ::= i # int 1831 // ::= j # unsigned int 1832 // ::= l # long 1833 // ::= m # unsigned long 1834 // ::= x # long long, __int64 1835 // ::= y # unsigned long long, __int64 1836 // ::= n # __int128 1837 // UNSUPPORTED: ::= o # unsigned __int128 1838 // ::= f # float 1839 // ::= d # double 1840 // ::= e # long double, __float80 1841 // UNSUPPORTED: ::= g # __float128 1842 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits) 1843 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits) 1844 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits) 1845 // ::= Dh # IEEE 754r half-precision floating point (16 bits) 1846 // ::= Di # char32_t 1847 // ::= Ds # char16_t 1848 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) 1849 // ::= u <source-name> # vendor extended type 1850 switch (T->getKind()) { 1851 case BuiltinType::Void: Out << 'v'; break; 1852 case BuiltinType::Bool: Out << 'b'; break; 1853 case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'c'; break; 1854 case BuiltinType::UChar: Out << 'h'; break; 1855 case BuiltinType::UShort: Out << 't'; break; 1856 case BuiltinType::UInt: Out << 'j'; break; 1857 case BuiltinType::ULong: Out << 'm'; break; 1858 case BuiltinType::ULongLong: Out << 'y'; break; 1859 case BuiltinType::UInt128: Out << 'o'; break; 1860 case BuiltinType::SChar: Out << 'a'; break; 1861 case BuiltinType::WChar_S: 1862 case BuiltinType::WChar_U: Out << 'w'; break; 1863 case BuiltinType::Char16: Out << "Ds"; break; 1864 case BuiltinType::Char32: Out << "Di"; break; 1865 case BuiltinType::Short: Out << 's'; break; 1866 case BuiltinType::Int: Out << 'i'; break; 1867 case BuiltinType::Long: Out << 'l'; break; 1868 case BuiltinType::LongLong: Out << 'x'; break; 1869 case BuiltinType::Int128: Out << 'n'; break; 1870 case BuiltinType::Half: Out << "Dh"; break; 1871 case BuiltinType::Float: Out << 'f'; break; 1872 case BuiltinType::Double: Out << 'd'; break; 1873 case BuiltinType::LongDouble: Out << 'e'; break; 1874 case BuiltinType::NullPtr: Out << "Dn"; break; 1875 1876#define BUILTIN_TYPE(Id, SingletonId) 1877#define PLACEHOLDER_TYPE(Id, SingletonId) \ 1878 case BuiltinType::Id: 1879#include "clang/AST/BuiltinTypes.def" 1880 case BuiltinType::Dependent: 1881 llvm_unreachable("mangling a placeholder type"); 1882 case BuiltinType::ObjCId: Out << "11objc_object"; break; 1883 case BuiltinType::ObjCClass: Out << "10objc_class"; break; 1884 case BuiltinType::ObjCSel: Out << "13objc_selector"; break; 1885 } 1886} 1887 1888// <type> ::= <function-type> 1889// <function-type> ::= [<CV-qualifiers>] F [Y] 1890// <bare-function-type> [<ref-qualifier>] E 1891// (Proposal to cxx-abi-dev, 2012-05-11) 1892void CXXNameMangler::mangleType(const FunctionProtoType *T) { 1893 // Mangle CV-qualifiers, if present. These are 'this' qualifiers, 1894 // e.g. "const" in "int (A::*)() const". 1895 mangleQualifiers(Qualifiers::fromCVRMask(T->getTypeQuals())); 1896 1897 Out << 'F'; 1898 1899 // FIXME: We don't have enough information in the AST to produce the 'Y' 1900 // encoding for extern "C" function types. 1901 mangleBareFunctionType(T, /*MangleReturnType=*/true); 1902 1903 // Mangle the ref-qualifier, if present. 1904 mangleRefQualifier(T->getRefQualifier()); 1905 1906 Out << 'E'; 1907} 1908void CXXNameMangler::mangleType(const FunctionNoProtoType *T) { 1909 llvm_unreachable("Can't mangle K&R function prototypes"); 1910} 1911void CXXNameMangler::mangleBareFunctionType(const FunctionType *T, 1912 bool MangleReturnType) { 1913 // We should never be mangling something without a prototype. 1914 const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 1915 1916 // Record that we're in a function type. See mangleFunctionParam 1917 // for details on what we're trying to achieve here. 1918 FunctionTypeDepthState saved = FunctionTypeDepth.push(); 1919 1920 // <bare-function-type> ::= <signature type>+ 1921 if (MangleReturnType) { 1922 FunctionTypeDepth.enterResultType(); 1923 mangleType(Proto->getResultType()); 1924 FunctionTypeDepth.leaveResultType(); 1925 } 1926 1927 if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) { 1928 // <builtin-type> ::= v # void 1929 Out << 'v'; 1930 1931 FunctionTypeDepth.pop(saved); 1932 return; 1933 } 1934 1935 for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(), 1936 ArgEnd = Proto->arg_type_end(); 1937 Arg != ArgEnd; ++Arg) 1938 mangleType(Context.getASTContext().getSignatureParameterType(*Arg)); 1939 1940 FunctionTypeDepth.pop(saved); 1941 1942 // <builtin-type> ::= z # ellipsis 1943 if (Proto->isVariadic()) 1944 Out << 'z'; 1945} 1946 1947// <type> ::= <class-enum-type> 1948// <class-enum-type> ::= <name> 1949void CXXNameMangler::mangleType(const UnresolvedUsingType *T) { 1950 mangleName(T->getDecl()); 1951} 1952 1953// <type> ::= <class-enum-type> 1954// <class-enum-type> ::= <name> 1955void CXXNameMangler::mangleType(const EnumType *T) { 1956 mangleType(static_cast<const TagType*>(T)); 1957} 1958void CXXNameMangler::mangleType(const RecordType *T) { 1959 mangleType(static_cast<const TagType*>(T)); 1960} 1961void CXXNameMangler::mangleType(const TagType *T) { 1962 mangleName(T->getDecl()); 1963} 1964 1965// <type> ::= <array-type> 1966// <array-type> ::= A <positive dimension number> _ <element type> 1967// ::= A [<dimension expression>] _ <element type> 1968void CXXNameMangler::mangleType(const ConstantArrayType *T) { 1969 Out << 'A' << T->getSize() << '_'; 1970 mangleType(T->getElementType()); 1971} 1972void CXXNameMangler::mangleType(const VariableArrayType *T) { 1973 Out << 'A'; 1974 // decayed vla types (size 0) will just be skipped. 1975 if (T->getSizeExpr()) 1976 mangleExpression(T->getSizeExpr()); 1977 Out << '_'; 1978 mangleType(T->getElementType()); 1979} 1980void CXXNameMangler::mangleType(const DependentSizedArrayType *T) { 1981 Out << 'A'; 1982 mangleExpression(T->getSizeExpr()); 1983 Out << '_'; 1984 mangleType(T->getElementType()); 1985} 1986void CXXNameMangler::mangleType(const IncompleteArrayType *T) { 1987 Out << "A_"; 1988 mangleType(T->getElementType()); 1989} 1990 1991// <type> ::= <pointer-to-member-type> 1992// <pointer-to-member-type> ::= M <class type> <member type> 1993void CXXNameMangler::mangleType(const MemberPointerType *T) { 1994 Out << 'M'; 1995 mangleType(QualType(T->getClass(), 0)); 1996 QualType PointeeType = T->getPointeeType(); 1997 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) { 1998 mangleType(FPT); 1999 2000 // Itanium C++ ABI 5.1.8: 2001 // 2002 // The type of a non-static member function is considered to be different, 2003 // for the purposes of substitution, from the type of a namespace-scope or 2004 // static member function whose type appears similar. The types of two 2005 // non-static member functions are considered to be different, for the 2006 // purposes of substitution, if the functions are members of different 2007 // classes. In other words, for the purposes of substitution, the class of 2008 // which the function is a member is considered part of the type of 2009 // function. 2010 2011 // Given that we already substitute member function pointers as a 2012 // whole, the net effect of this rule is just to unconditionally 2013 // suppress substitution on the function type in a member pointer. 2014 // We increment the SeqID here to emulate adding an entry to the 2015 // substitution table. 2016 ++SeqID; 2017 } else 2018 mangleType(PointeeType); 2019} 2020 2021// <type> ::= <template-param> 2022void CXXNameMangler::mangleType(const TemplateTypeParmType *T) { 2023 mangleTemplateParameter(T->getIndex()); 2024} 2025 2026// <type> ::= <template-param> 2027void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) { 2028 // FIXME: not clear how to mangle this! 2029 // template <class T...> class A { 2030 // template <class U...> void foo(T(*)(U) x...); 2031 // }; 2032 Out << "_SUBSTPACK_"; 2033} 2034 2035// <type> ::= P <type> # pointer-to 2036void CXXNameMangler::mangleType(const PointerType *T) { 2037 Out << 'P'; 2038 mangleType(T->getPointeeType()); 2039} 2040void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) { 2041 Out << 'P'; 2042 mangleType(T->getPointeeType()); 2043} 2044 2045// <type> ::= R <type> # reference-to 2046void CXXNameMangler::mangleType(const LValueReferenceType *T) { 2047 Out << 'R'; 2048 mangleType(T->getPointeeType()); 2049} 2050 2051// <type> ::= O <type> # rvalue reference-to (C++0x) 2052void CXXNameMangler::mangleType(const RValueReferenceType *T) { 2053 Out << 'O'; 2054 mangleType(T->getPointeeType()); 2055} 2056 2057// <type> ::= C <type> # complex pair (C 2000) 2058void CXXNameMangler::mangleType(const ComplexType *T) { 2059 Out << 'C'; 2060 mangleType(T->getElementType()); 2061} 2062 2063// ARM's ABI for Neon vector types specifies that they should be mangled as 2064// if they are structs (to match ARM's initial implementation). The 2065// vector type must be one of the special types predefined by ARM. 2066void CXXNameMangler::mangleNeonVectorType(const VectorType *T) { 2067 QualType EltType = T->getElementType(); 2068 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType"); 2069 const char *EltName = 0; 2070 if (T->getVectorKind() == VectorType::NeonPolyVector) { 2071 switch (cast<BuiltinType>(EltType)->getKind()) { 2072 case BuiltinType::SChar: EltName = "poly8_t"; break; 2073 case BuiltinType::Short: EltName = "poly16_t"; break; 2074 default: llvm_unreachable("unexpected Neon polynomial vector element type"); 2075 } 2076 } else { 2077 switch (cast<BuiltinType>(EltType)->getKind()) { 2078 case BuiltinType::SChar: EltName = "int8_t"; break; 2079 case BuiltinType::UChar: EltName = "uint8_t"; break; 2080 case BuiltinType::Short: EltName = "int16_t"; break; 2081 case BuiltinType::UShort: EltName = "uint16_t"; break; 2082 case BuiltinType::Int: EltName = "int32_t"; break; 2083 case BuiltinType::UInt: EltName = "uint32_t"; break; 2084 case BuiltinType::LongLong: EltName = "int64_t"; break; 2085 case BuiltinType::ULongLong: EltName = "uint64_t"; break; 2086 case BuiltinType::Float: EltName = "float32_t"; break; 2087 default: llvm_unreachable("unexpected Neon vector element type"); 2088 } 2089 } 2090 const char *BaseName = 0; 2091 unsigned BitSize = (T->getNumElements() * 2092 getASTContext().getTypeSize(EltType)); 2093 if (BitSize == 64) 2094 BaseName = "__simd64_"; 2095 else { 2096 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits"); 2097 BaseName = "__simd128_"; 2098 } 2099 Out << strlen(BaseName) + strlen(EltName); 2100 Out << BaseName << EltName; 2101} 2102 2103// GNU extension: vector types 2104// <type> ::= <vector-type> 2105// <vector-type> ::= Dv <positive dimension number> _ 2106// <extended element type> 2107// ::= Dv [<dimension expression>] _ <element type> 2108// <extended element type> ::= <element type> 2109// ::= p # AltiVec vector pixel 2110// ::= b # Altivec vector bool 2111void CXXNameMangler::mangleType(const VectorType *T) { 2112 if ((T->getVectorKind() == VectorType::NeonVector || 2113 T->getVectorKind() == VectorType::NeonPolyVector)) { 2114 mangleNeonVectorType(T); 2115 return; 2116 } 2117 Out << "Dv" << T->getNumElements() << '_'; 2118 if (T->getVectorKind() == VectorType::AltiVecPixel) 2119 Out << 'p'; 2120 else if (T->getVectorKind() == VectorType::AltiVecBool) 2121 Out << 'b'; 2122 else 2123 mangleType(T->getElementType()); 2124} 2125void CXXNameMangler::mangleType(const ExtVectorType *T) { 2126 mangleType(static_cast<const VectorType*>(T)); 2127} 2128void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) { 2129 Out << "Dv"; 2130 mangleExpression(T->getSizeExpr()); 2131 Out << '_'; 2132 mangleType(T->getElementType()); 2133} 2134 2135void CXXNameMangler::mangleType(const PackExpansionType *T) { 2136 // <type> ::= Dp <type> # pack expansion (C++0x) 2137 Out << "Dp"; 2138 mangleType(T->getPattern()); 2139} 2140 2141void CXXNameMangler::mangleType(const ObjCInterfaceType *T) { 2142 mangleSourceName(T->getDecl()->getIdentifier()); 2143} 2144 2145void CXXNameMangler::mangleType(const ObjCObjectType *T) { 2146 // We don't allow overloading by different protocol qualification, 2147 // so mangling them isn't necessary. 2148 mangleType(T->getBaseType()); 2149} 2150 2151void CXXNameMangler::mangleType(const BlockPointerType *T) { 2152 Out << "U13block_pointer"; 2153 mangleType(T->getPointeeType()); 2154} 2155 2156void CXXNameMangler::mangleType(const InjectedClassNameType *T) { 2157 // Mangle injected class name types as if the user had written the 2158 // specialization out fully. It may not actually be possible to see 2159 // this mangling, though. 2160 mangleType(T->getInjectedSpecializationType()); 2161} 2162 2163void CXXNameMangler::mangleType(const TemplateSpecializationType *T) { 2164 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) { 2165 mangleName(TD, T->getArgs(), T->getNumArgs()); 2166 } else { 2167 if (mangleSubstitution(QualType(T, 0))) 2168 return; 2169 2170 mangleTemplatePrefix(T->getTemplateName()); 2171 2172 // FIXME: GCC does not appear to mangle the template arguments when 2173 // the template in question is a dependent template name. Should we 2174 // emulate that badness? 2175 mangleTemplateArgs(T->getArgs(), T->getNumArgs()); 2176 addSubstitution(QualType(T, 0)); 2177 } 2178} 2179 2180void CXXNameMangler::mangleType(const DependentNameType *T) { 2181 // Typename types are always nested 2182 Out << 'N'; 2183 manglePrefix(T->getQualifier()); 2184 mangleSourceName(T->getIdentifier()); 2185 Out << 'E'; 2186} 2187 2188void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) { 2189 // Dependently-scoped template types are nested if they have a prefix. 2190 Out << 'N'; 2191 2192 // TODO: avoid making this TemplateName. 2193 TemplateName Prefix = 2194 getASTContext().getDependentTemplateName(T->getQualifier(), 2195 T->getIdentifier()); 2196 mangleTemplatePrefix(Prefix); 2197 2198 // FIXME: GCC does not appear to mangle the template arguments when 2199 // the template in question is a dependent template name. Should we 2200 // emulate that badness? 2201 mangleTemplateArgs(T->getArgs(), T->getNumArgs()); 2202 Out << 'E'; 2203} 2204 2205void CXXNameMangler::mangleType(const TypeOfType *T) { 2206 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2207 // "extension with parameters" mangling. 2208 Out << "u6typeof"; 2209} 2210 2211void CXXNameMangler::mangleType(const TypeOfExprType *T) { 2212 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2213 // "extension with parameters" mangling. 2214 Out << "u6typeof"; 2215} 2216 2217void CXXNameMangler::mangleType(const DecltypeType *T) { 2218 Expr *E = T->getUnderlyingExpr(); 2219 2220 // type ::= Dt <expression> E # decltype of an id-expression 2221 // # or class member access 2222 // ::= DT <expression> E # decltype of an expression 2223 2224 // This purports to be an exhaustive list of id-expressions and 2225 // class member accesses. Note that we do not ignore parentheses; 2226 // parentheses change the semantics of decltype for these 2227 // expressions (and cause the mangler to use the other form). 2228 if (isa<DeclRefExpr>(E) || 2229 isa<MemberExpr>(E) || 2230 isa<UnresolvedLookupExpr>(E) || 2231 isa<DependentScopeDeclRefExpr>(E) || 2232 isa<CXXDependentScopeMemberExpr>(E) || 2233 isa<UnresolvedMemberExpr>(E)) 2234 Out << "Dt"; 2235 else 2236 Out << "DT"; 2237 mangleExpression(E); 2238 Out << 'E'; 2239} 2240 2241void CXXNameMangler::mangleType(const UnaryTransformType *T) { 2242 // If this is dependent, we need to record that. If not, we simply 2243 // mangle it as the underlying type since they are equivalent. 2244 if (T->isDependentType()) { 2245 Out << 'U'; 2246 2247 switch (T->getUTTKind()) { 2248 case UnaryTransformType::EnumUnderlyingType: 2249 Out << "3eut"; 2250 break; 2251 } 2252 } 2253 2254 mangleType(T->getUnderlyingType()); 2255} 2256 2257void CXXNameMangler::mangleType(const AutoType *T) { 2258 QualType D = T->getDeducedType(); 2259 // <builtin-type> ::= Da # dependent auto 2260 if (D.isNull()) 2261 Out << "Da"; 2262 else 2263 mangleType(D); 2264} 2265 2266void CXXNameMangler::mangleType(const AtomicType *T) { 2267 // <type> ::= U <source-name> <type> # vendor extended type qualifier 2268 // (Until there's a standardized mangling...) 2269 Out << "U7_Atomic"; 2270 mangleType(T->getValueType()); 2271} 2272 2273void CXXNameMangler::mangleIntegerLiteral(QualType T, 2274 const llvm::APSInt &Value) { 2275 // <expr-primary> ::= L <type> <value number> E # integer literal 2276 Out << 'L'; 2277 2278 mangleType(T); 2279 if (T->isBooleanType()) { 2280 // Boolean values are encoded as 0/1. 2281 Out << (Value.getBoolValue() ? '1' : '0'); 2282 } else { 2283 mangleNumber(Value); 2284 } 2285 Out << 'E'; 2286 2287} 2288 2289/// Mangles a member expression. 2290void CXXNameMangler::mangleMemberExpr(const Expr *base, 2291 bool isArrow, 2292 NestedNameSpecifier *qualifier, 2293 NamedDecl *firstQualifierLookup, 2294 DeclarationName member, 2295 unsigned arity) { 2296 // <expression> ::= dt <expression> <unresolved-name> 2297 // ::= pt <expression> <unresolved-name> 2298 if (base) { 2299 if (base->isImplicitCXXThis()) { 2300 // Note: GCC mangles member expressions to the implicit 'this' as 2301 // *this., whereas we represent them as this->. The Itanium C++ ABI 2302 // does not specify anything here, so we follow GCC. 2303 Out << "dtdefpT"; 2304 } else { 2305 Out << (isArrow ? "pt" : "dt"); 2306 mangleExpression(base); 2307 } 2308 } 2309 mangleUnresolvedName(qualifier, firstQualifierLookup, member, arity); 2310} 2311 2312/// Look at the callee of the given call expression and determine if 2313/// it's a parenthesized id-expression which would have triggered ADL 2314/// otherwise. 2315static bool isParenthesizedADLCallee(const CallExpr *call) { 2316 const Expr *callee = call->getCallee(); 2317 const Expr *fn = callee->IgnoreParens(); 2318 2319 // Must be parenthesized. IgnoreParens() skips __extension__ nodes, 2320 // too, but for those to appear in the callee, it would have to be 2321 // parenthesized. 2322 if (callee == fn) return false; 2323 2324 // Must be an unresolved lookup. 2325 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn); 2326 if (!lookup) return false; 2327 2328 assert(!lookup->requiresADL()); 2329 2330 // Must be an unqualified lookup. 2331 if (lookup->getQualifier()) return false; 2332 2333 // Must not have found a class member. Note that if one is a class 2334 // member, they're all class members. 2335 if (lookup->getNumDecls() > 0 && 2336 (*lookup->decls_begin())->isCXXClassMember()) 2337 return false; 2338 2339 // Otherwise, ADL would have been triggered. 2340 return true; 2341} 2342 2343void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) { 2344 // <expression> ::= <unary operator-name> <expression> 2345 // ::= <binary operator-name> <expression> <expression> 2346 // ::= <trinary operator-name> <expression> <expression> <expression> 2347 // ::= cv <type> expression # conversion with one argument 2348 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments 2349 // ::= st <type> # sizeof (a type) 2350 // ::= at <type> # alignof (a type) 2351 // ::= <template-param> 2352 // ::= <function-param> 2353 // ::= sr <type> <unqualified-name> # dependent name 2354 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 2355 // ::= ds <expression> <expression> # expr.*expr 2356 // ::= sZ <template-param> # size of a parameter pack 2357 // ::= sZ <function-param> # size of a function parameter pack 2358 // ::= <expr-primary> 2359 // <expr-primary> ::= L <type> <value number> E # integer literal 2360 // ::= L <type <value float> E # floating literal 2361 // ::= L <mangled-name> E # external name 2362 // ::= fpT # 'this' expression 2363 QualType ImplicitlyConvertedToType; 2364 2365recurse: 2366 switch (E->getStmtClass()) { 2367 case Expr::NoStmtClass: 2368#define ABSTRACT_STMT(Type) 2369#define EXPR(Type, Base) 2370#define STMT(Type, Base) \ 2371 case Expr::Type##Class: 2372#include "clang/AST/StmtNodes.inc" 2373 // fallthrough 2374 2375 // These all can only appear in local or variable-initialization 2376 // contexts and so should never appear in a mangling. 2377 case Expr::AddrLabelExprClass: 2378 case Expr::DesignatedInitExprClass: 2379 case Expr::ImplicitValueInitExprClass: 2380 case Expr::ParenListExprClass: 2381 case Expr::LambdaExprClass: 2382 llvm_unreachable("unexpected statement kind"); 2383 2384 // FIXME: invent manglings for all these. 2385 case Expr::BlockExprClass: 2386 case Expr::CXXPseudoDestructorExprClass: 2387 case Expr::ChooseExprClass: 2388 case Expr::CompoundLiteralExprClass: 2389 case Expr::ExtVectorElementExprClass: 2390 case Expr::GenericSelectionExprClass: 2391 case Expr::ObjCEncodeExprClass: 2392 case Expr::ObjCIsaExprClass: 2393 case Expr::ObjCIvarRefExprClass: 2394 case Expr::ObjCMessageExprClass: 2395 case Expr::ObjCPropertyRefExprClass: 2396 case Expr::ObjCProtocolExprClass: 2397 case Expr::ObjCSelectorExprClass: 2398 case Expr::ObjCStringLiteralClass: 2399 case Expr::ObjCBoxedExprClass: 2400 case Expr::ObjCArrayLiteralClass: 2401 case Expr::ObjCDictionaryLiteralClass: 2402 case Expr::ObjCSubscriptRefExprClass: 2403 case Expr::ObjCIndirectCopyRestoreExprClass: 2404 case Expr::OffsetOfExprClass: 2405 case Expr::PredefinedExprClass: 2406 case Expr::ShuffleVectorExprClass: 2407 case Expr::StmtExprClass: 2408 case Expr::UnaryTypeTraitExprClass: 2409 case Expr::BinaryTypeTraitExprClass: 2410 case Expr::TypeTraitExprClass: 2411 case Expr::ArrayTypeTraitExprClass: 2412 case Expr::ExpressionTraitExprClass: 2413 case Expr::VAArgExprClass: 2414 case Expr::CXXUuidofExprClass: 2415 case Expr::CUDAKernelCallExprClass: 2416 case Expr::AsTypeExprClass: 2417 case Expr::PseudoObjectExprClass: 2418 case Expr::AtomicExprClass: 2419 { 2420 // As bad as this diagnostic is, it's better than crashing. 2421 DiagnosticsEngine &Diags = Context.getDiags(); 2422 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, 2423 "cannot yet mangle expression type %0"); 2424 Diags.Report(E->getExprLoc(), DiagID) 2425 << E->getStmtClassName() << E->getSourceRange(); 2426 break; 2427 } 2428 2429 // Even gcc-4.5 doesn't mangle this. 2430 case Expr::BinaryConditionalOperatorClass: { 2431 DiagnosticsEngine &Diags = Context.getDiags(); 2432 unsigned DiagID = 2433 Diags.getCustomDiagID(DiagnosticsEngine::Error, 2434 "?: operator with omitted middle operand cannot be mangled"); 2435 Diags.Report(E->getExprLoc(), DiagID) 2436 << E->getStmtClassName() << E->getSourceRange(); 2437 break; 2438 } 2439 2440 // These are used for internal purposes and cannot be meaningfully mangled. 2441 case Expr::OpaqueValueExprClass: 2442 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?"); 2443 2444 case Expr::InitListExprClass: { 2445 // Proposal by Jason Merrill, 2012-01-03 2446 Out << "il"; 2447 const InitListExpr *InitList = cast<InitListExpr>(E); 2448 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i) 2449 mangleExpression(InitList->getInit(i)); 2450 Out << "E"; 2451 break; 2452 } 2453 2454 case Expr::CXXDefaultArgExprClass: 2455 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity); 2456 break; 2457 2458 case Expr::SubstNonTypeTemplateParmExprClass: 2459 mangleExpression(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(), 2460 Arity); 2461 break; 2462 2463 case Expr::UserDefinedLiteralClass: 2464 // We follow g++'s approach of mangling a UDL as a call to the literal 2465 // operator. 2466 case Expr::CXXMemberCallExprClass: // fallthrough 2467 case Expr::CallExprClass: { 2468 const CallExpr *CE = cast<CallExpr>(E); 2469 2470 // <expression> ::= cp <simple-id> <expression>* E 2471 // We use this mangling only when the call would use ADL except 2472 // for being parenthesized. Per discussion with David 2473 // Vandervoorde, 2011.04.25. 2474 if (isParenthesizedADLCallee(CE)) { 2475 Out << "cp"; 2476 // The callee here is a parenthesized UnresolvedLookupExpr with 2477 // no qualifier and should always get mangled as a <simple-id> 2478 // anyway. 2479 2480 // <expression> ::= cl <expression>* E 2481 } else { 2482 Out << "cl"; 2483 } 2484 2485 mangleExpression(CE->getCallee(), CE->getNumArgs()); 2486 for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I) 2487 mangleExpression(CE->getArg(I)); 2488 Out << 'E'; 2489 break; 2490 } 2491 2492 case Expr::CXXNewExprClass: { 2493 const CXXNewExpr *New = cast<CXXNewExpr>(E); 2494 if (New->isGlobalNew()) Out << "gs"; 2495 Out << (New->isArray() ? "na" : "nw"); 2496 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(), 2497 E = New->placement_arg_end(); I != E; ++I) 2498 mangleExpression(*I); 2499 Out << '_'; 2500 mangleType(New->getAllocatedType()); 2501 if (New->hasInitializer()) { 2502 // Proposal by Jason Merrill, 2012-01-03 2503 if (New->getInitializationStyle() == CXXNewExpr::ListInit) 2504 Out << "il"; 2505 else 2506 Out << "pi"; 2507 const Expr *Init = New->getInitializer(); 2508 if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) { 2509 // Directly inline the initializers. 2510 for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(), 2511 E = CCE->arg_end(); 2512 I != E; ++I) 2513 mangleExpression(*I); 2514 } else if (const ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) { 2515 for (unsigned i = 0, e = PLE->getNumExprs(); i != e; ++i) 2516 mangleExpression(PLE->getExpr(i)); 2517 } else if (New->getInitializationStyle() == CXXNewExpr::ListInit && 2518 isa<InitListExpr>(Init)) { 2519 // Only take InitListExprs apart for list-initialization. 2520 const InitListExpr *InitList = cast<InitListExpr>(Init); 2521 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i) 2522 mangleExpression(InitList->getInit(i)); 2523 } else 2524 mangleExpression(Init); 2525 } 2526 Out << 'E'; 2527 break; 2528 } 2529 2530 case Expr::MemberExprClass: { 2531 const MemberExpr *ME = cast<MemberExpr>(E); 2532 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2533 ME->getQualifier(), 0, ME->getMemberDecl()->getDeclName(), 2534 Arity); 2535 break; 2536 } 2537 2538 case Expr::UnresolvedMemberExprClass: { 2539 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E); 2540 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2541 ME->getQualifier(), 0, ME->getMemberName(), 2542 Arity); 2543 if (ME->hasExplicitTemplateArgs()) 2544 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2545 break; 2546 } 2547 2548 case Expr::CXXDependentScopeMemberExprClass: { 2549 const CXXDependentScopeMemberExpr *ME 2550 = cast<CXXDependentScopeMemberExpr>(E); 2551 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2552 ME->getQualifier(), ME->getFirstQualifierFoundInScope(), 2553 ME->getMember(), Arity); 2554 if (ME->hasExplicitTemplateArgs()) 2555 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2556 break; 2557 } 2558 2559 case Expr::UnresolvedLookupExprClass: { 2560 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E); 2561 mangleUnresolvedName(ULE->getQualifier(), 0, ULE->getName(), Arity); 2562 2563 // All the <unresolved-name> productions end in a 2564 // base-unresolved-name, where <template-args> are just tacked 2565 // onto the end. 2566 if (ULE->hasExplicitTemplateArgs()) 2567 mangleTemplateArgs(ULE->getExplicitTemplateArgs()); 2568 break; 2569 } 2570 2571 case Expr::CXXUnresolvedConstructExprClass: { 2572 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E); 2573 unsigned N = CE->arg_size(); 2574 2575 Out << "cv"; 2576 mangleType(CE->getType()); 2577 if (N != 1) Out << '_'; 2578 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2579 if (N != 1) Out << 'E'; 2580 break; 2581 } 2582 2583 case Expr::CXXTemporaryObjectExprClass: 2584 case Expr::CXXConstructExprClass: { 2585 const CXXConstructExpr *CE = cast<CXXConstructExpr>(E); 2586 unsigned N = CE->getNumArgs(); 2587 2588 // Proposal by Jason Merrill, 2012-01-03 2589 if (CE->isListInitialization()) 2590 Out << "tl"; 2591 else 2592 Out << "cv"; 2593 mangleType(CE->getType()); 2594 if (N != 1) Out << '_'; 2595 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2596 if (N != 1) Out << 'E'; 2597 break; 2598 } 2599 2600 case Expr::CXXScalarValueInitExprClass: 2601 Out <<"cv"; 2602 mangleType(E->getType()); 2603 Out <<"_E"; 2604 break; 2605 2606 case Expr::CXXNoexceptExprClass: 2607 Out << "nx"; 2608 mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand()); 2609 break; 2610 2611 case Expr::UnaryExprOrTypeTraitExprClass: { 2612 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E); 2613 2614 if (!SAE->isInstantiationDependent()) { 2615 // Itanium C++ ABI: 2616 // If the operand of a sizeof or alignof operator is not 2617 // instantiation-dependent it is encoded as an integer literal 2618 // reflecting the result of the operator. 2619 // 2620 // If the result of the operator is implicitly converted to a known 2621 // integer type, that type is used for the literal; otherwise, the type 2622 // of std::size_t or std::ptrdiff_t is used. 2623 QualType T = (ImplicitlyConvertedToType.isNull() || 2624 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType() 2625 : ImplicitlyConvertedToType; 2626 llvm::APSInt V = SAE->EvaluateKnownConstInt(Context.getASTContext()); 2627 mangleIntegerLiteral(T, V); 2628 break; 2629 } 2630 2631 switch(SAE->getKind()) { 2632 case UETT_SizeOf: 2633 Out << 's'; 2634 break; 2635 case UETT_AlignOf: 2636 Out << 'a'; 2637 break; 2638 case UETT_VecStep: 2639 DiagnosticsEngine &Diags = Context.getDiags(); 2640 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, 2641 "cannot yet mangle vec_step expression"); 2642 Diags.Report(DiagID); 2643 return; 2644 } 2645 if (SAE->isArgumentType()) { 2646 Out << 't'; 2647 mangleType(SAE->getArgumentType()); 2648 } else { 2649 Out << 'z'; 2650 mangleExpression(SAE->getArgumentExpr()); 2651 } 2652 break; 2653 } 2654 2655 case Expr::CXXThrowExprClass: { 2656 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E); 2657 2658 // Proposal from David Vandervoorde, 2010.06.30 2659 if (TE->getSubExpr()) { 2660 Out << "tw"; 2661 mangleExpression(TE->getSubExpr()); 2662 } else { 2663 Out << "tr"; 2664 } 2665 break; 2666 } 2667 2668 case Expr::CXXTypeidExprClass: { 2669 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E); 2670 2671 // Proposal from David Vandervoorde, 2010.06.30 2672 if (TIE->isTypeOperand()) { 2673 Out << "ti"; 2674 mangleType(TIE->getTypeOperand()); 2675 } else { 2676 Out << "te"; 2677 mangleExpression(TIE->getExprOperand()); 2678 } 2679 break; 2680 } 2681 2682 case Expr::CXXDeleteExprClass: { 2683 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E); 2684 2685 // Proposal from David Vandervoorde, 2010.06.30 2686 if (DE->isGlobalDelete()) Out << "gs"; 2687 Out << (DE->isArrayForm() ? "da" : "dl"); 2688 mangleExpression(DE->getArgument()); 2689 break; 2690 } 2691 2692 case Expr::UnaryOperatorClass: { 2693 const UnaryOperator *UO = cast<UnaryOperator>(E); 2694 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()), 2695 /*Arity=*/1); 2696 mangleExpression(UO->getSubExpr()); 2697 break; 2698 } 2699 2700 case Expr::ArraySubscriptExprClass: { 2701 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E); 2702 2703 // Array subscript is treated as a syntactically weird form of 2704 // binary operator. 2705 Out << "ix"; 2706 mangleExpression(AE->getLHS()); 2707 mangleExpression(AE->getRHS()); 2708 break; 2709 } 2710 2711 case Expr::CompoundAssignOperatorClass: // fallthrough 2712 case Expr::BinaryOperatorClass: { 2713 const BinaryOperator *BO = cast<BinaryOperator>(E); 2714 if (BO->getOpcode() == BO_PtrMemD) 2715 Out << "ds"; 2716 else 2717 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()), 2718 /*Arity=*/2); 2719 mangleExpression(BO->getLHS()); 2720 mangleExpression(BO->getRHS()); 2721 break; 2722 } 2723 2724 case Expr::ConditionalOperatorClass: { 2725 const ConditionalOperator *CO = cast<ConditionalOperator>(E); 2726 mangleOperatorName(OO_Conditional, /*Arity=*/3); 2727 mangleExpression(CO->getCond()); 2728 mangleExpression(CO->getLHS(), Arity); 2729 mangleExpression(CO->getRHS(), Arity); 2730 break; 2731 } 2732 2733 case Expr::ImplicitCastExprClass: { 2734 ImplicitlyConvertedToType = E->getType(); 2735 E = cast<ImplicitCastExpr>(E)->getSubExpr(); 2736 goto recurse; 2737 } 2738 2739 case Expr::ObjCBridgedCastExprClass: { 2740 // Mangle ownership casts as a vendor extended operator __bridge, 2741 // __bridge_transfer, or __bridge_retain. 2742 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName(); 2743 Out << "v1U" << Kind.size() << Kind; 2744 } 2745 // Fall through to mangle the cast itself. 2746 2747 case Expr::CStyleCastExprClass: 2748 case Expr::CXXStaticCastExprClass: 2749 case Expr::CXXDynamicCastExprClass: 2750 case Expr::CXXReinterpretCastExprClass: 2751 case Expr::CXXConstCastExprClass: 2752 case Expr::CXXFunctionalCastExprClass: { 2753 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E); 2754 Out << "cv"; 2755 mangleType(ECE->getType()); 2756 mangleExpression(ECE->getSubExpr()); 2757 break; 2758 } 2759 2760 case Expr::CXXOperatorCallExprClass: { 2761 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E); 2762 unsigned NumArgs = CE->getNumArgs(); 2763 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs); 2764 // Mangle the arguments. 2765 for (unsigned i = 0; i != NumArgs; ++i) 2766 mangleExpression(CE->getArg(i)); 2767 break; 2768 } 2769 2770 case Expr::ParenExprClass: 2771 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity); 2772 break; 2773 2774 case Expr::DeclRefExprClass: { 2775 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2776 2777 switch (D->getKind()) { 2778 default: 2779 // <expr-primary> ::= L <mangled-name> E # external name 2780 Out << 'L'; 2781 mangle(D, "_Z"); 2782 Out << 'E'; 2783 break; 2784 2785 case Decl::ParmVar: 2786 mangleFunctionParam(cast<ParmVarDecl>(D)); 2787 break; 2788 2789 case Decl::EnumConstant: { 2790 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D); 2791 mangleIntegerLiteral(ED->getType(), ED->getInitVal()); 2792 break; 2793 } 2794 2795 case Decl::NonTypeTemplateParm: { 2796 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D); 2797 mangleTemplateParameter(PD->getIndex()); 2798 break; 2799 } 2800 2801 } 2802 2803 break; 2804 } 2805 2806 case Expr::SubstNonTypeTemplateParmPackExprClass: 2807 // FIXME: not clear how to mangle this! 2808 // template <unsigned N...> class A { 2809 // template <class U...> void foo(U (&x)[N]...); 2810 // }; 2811 Out << "_SUBSTPACK_"; 2812 break; 2813 2814 case Expr::FunctionParmPackExprClass: { 2815 // FIXME: not clear how to mangle this! 2816 const FunctionParmPackExpr *FPPE = cast<FunctionParmPackExpr>(E); 2817 Out << "v110_SUBSTPACK"; 2818 mangleFunctionParam(FPPE->getParameterPack()); 2819 break; 2820 } 2821 2822 case Expr::DependentScopeDeclRefExprClass: { 2823 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E); 2824 mangleUnresolvedName(DRE->getQualifier(), 0, DRE->getDeclName(), Arity); 2825 2826 // All the <unresolved-name> productions end in a 2827 // base-unresolved-name, where <template-args> are just tacked 2828 // onto the end. 2829 if (DRE->hasExplicitTemplateArgs()) 2830 mangleTemplateArgs(DRE->getExplicitTemplateArgs()); 2831 break; 2832 } 2833 2834 case Expr::CXXBindTemporaryExprClass: 2835 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr()); 2836 break; 2837 2838 case Expr::ExprWithCleanupsClass: 2839 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity); 2840 break; 2841 2842 case Expr::FloatingLiteralClass: { 2843 const FloatingLiteral *FL = cast<FloatingLiteral>(E); 2844 Out << 'L'; 2845 mangleType(FL->getType()); 2846 mangleFloat(FL->getValue()); 2847 Out << 'E'; 2848 break; 2849 } 2850 2851 case Expr::CharacterLiteralClass: 2852 Out << 'L'; 2853 mangleType(E->getType()); 2854 Out << cast<CharacterLiteral>(E)->getValue(); 2855 Out << 'E'; 2856 break; 2857 2858 // FIXME. __objc_yes/__objc_no are mangled same as true/false 2859 case Expr::ObjCBoolLiteralExprClass: 2860 Out << "Lb"; 2861 Out << (cast<ObjCBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2862 Out << 'E'; 2863 break; 2864 2865 case Expr::CXXBoolLiteralExprClass: 2866 Out << "Lb"; 2867 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2868 Out << 'E'; 2869 break; 2870 2871 case Expr::IntegerLiteralClass: { 2872 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue()); 2873 if (E->getType()->isSignedIntegerType()) 2874 Value.setIsSigned(true); 2875 mangleIntegerLiteral(E->getType(), Value); 2876 break; 2877 } 2878 2879 case Expr::ImaginaryLiteralClass: { 2880 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E); 2881 // Mangle as if a complex literal. 2882 // Proposal from David Vandevoorde, 2010.06.30. 2883 Out << 'L'; 2884 mangleType(E->getType()); 2885 if (const FloatingLiteral *Imag = 2886 dyn_cast<FloatingLiteral>(IE->getSubExpr())) { 2887 // Mangle a floating-point zero of the appropriate type. 2888 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics())); 2889 Out << '_'; 2890 mangleFloat(Imag->getValue()); 2891 } else { 2892 Out << "0_"; 2893 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue()); 2894 if (IE->getSubExpr()->getType()->isSignedIntegerType()) 2895 Value.setIsSigned(true); 2896 mangleNumber(Value); 2897 } 2898 Out << 'E'; 2899 break; 2900 } 2901 2902 case Expr::StringLiteralClass: { 2903 // Revised proposal from David Vandervoorde, 2010.07.15. 2904 Out << 'L'; 2905 assert(isa<ConstantArrayType>(E->getType())); 2906 mangleType(E->getType()); 2907 Out << 'E'; 2908 break; 2909 } 2910 2911 case Expr::GNUNullExprClass: 2912 // FIXME: should this really be mangled the same as nullptr? 2913 // fallthrough 2914 2915 case Expr::CXXNullPtrLiteralExprClass: { 2916 // Proposal from David Vandervoorde, 2010.06.30, as 2917 // modified by ABI list discussion. 2918 Out << "LDnE"; 2919 break; 2920 } 2921 2922 case Expr::PackExpansionExprClass: 2923 Out << "sp"; 2924 mangleExpression(cast<PackExpansionExpr>(E)->getPattern()); 2925 break; 2926 2927 case Expr::SizeOfPackExprClass: { 2928 Out << "sZ"; 2929 const NamedDecl *Pack = cast<SizeOfPackExpr>(E)->getPack(); 2930 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack)) 2931 mangleTemplateParameter(TTP->getIndex()); 2932 else if (const NonTypeTemplateParmDecl *NTTP 2933 = dyn_cast<NonTypeTemplateParmDecl>(Pack)) 2934 mangleTemplateParameter(NTTP->getIndex()); 2935 else if (const TemplateTemplateParmDecl *TempTP 2936 = dyn_cast<TemplateTemplateParmDecl>(Pack)) 2937 mangleTemplateParameter(TempTP->getIndex()); 2938 else 2939 mangleFunctionParam(cast<ParmVarDecl>(Pack)); 2940 break; 2941 } 2942 2943 case Expr::MaterializeTemporaryExprClass: { 2944 mangleExpression(cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()); 2945 break; 2946 } 2947 2948 case Expr::CXXThisExprClass: 2949 Out << "fpT"; 2950 break; 2951 } 2952} 2953 2954/// Mangle an expression which refers to a parameter variable. 2955/// 2956/// <expression> ::= <function-param> 2957/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0 2958/// <function-param> ::= fp <top-level CV-qualifiers> 2959/// <parameter-2 non-negative number> _ # L == 0, I > 0 2960/// <function-param> ::= fL <L-1 non-negative number> 2961/// p <top-level CV-qualifiers> _ # L > 0, I == 0 2962/// <function-param> ::= fL <L-1 non-negative number> 2963/// p <top-level CV-qualifiers> 2964/// <I-1 non-negative number> _ # L > 0, I > 0 2965/// 2966/// L is the nesting depth of the parameter, defined as 1 if the 2967/// parameter comes from the innermost function prototype scope 2968/// enclosing the current context, 2 if from the next enclosing 2969/// function prototype scope, and so on, with one special case: if 2970/// we've processed the full parameter clause for the innermost 2971/// function type, then L is one less. This definition conveniently 2972/// makes it irrelevant whether a function's result type was written 2973/// trailing or leading, but is otherwise overly complicated; the 2974/// numbering was first designed without considering references to 2975/// parameter in locations other than return types, and then the 2976/// mangling had to be generalized without changing the existing 2977/// manglings. 2978/// 2979/// I is the zero-based index of the parameter within its parameter 2980/// declaration clause. Note that the original ABI document describes 2981/// this using 1-based ordinals. 2982void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) { 2983 unsigned parmDepth = parm->getFunctionScopeDepth(); 2984 unsigned parmIndex = parm->getFunctionScopeIndex(); 2985 2986 // Compute 'L'. 2987 // parmDepth does not include the declaring function prototype. 2988 // FunctionTypeDepth does account for that. 2989 assert(parmDepth < FunctionTypeDepth.getDepth()); 2990 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth; 2991 if (FunctionTypeDepth.isInResultType()) 2992 nestingDepth--; 2993 2994 if (nestingDepth == 0) { 2995 Out << "fp"; 2996 } else { 2997 Out << "fL" << (nestingDepth - 1) << 'p'; 2998 } 2999 3000 // Top-level qualifiers. We don't have to worry about arrays here, 3001 // because parameters declared as arrays should already have been 3002 // transformed to have pointer type. FIXME: apparently these don't 3003 // get mangled if used as an rvalue of a known non-class type? 3004 assert(!parm->getType()->isArrayType() 3005 && "parameter's type is still an array type?"); 3006 mangleQualifiers(parm->getType().getQualifiers()); 3007 3008 // Parameter index. 3009 if (parmIndex != 0) { 3010 Out << (parmIndex - 1); 3011 } 3012 Out << '_'; 3013} 3014 3015void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) { 3016 // <ctor-dtor-name> ::= C1 # complete object constructor 3017 // ::= C2 # base object constructor 3018 // ::= C3 # complete object allocating constructor 3019 // 3020 switch (T) { 3021 case Ctor_Complete: 3022 Out << "C1"; 3023 break; 3024 case Ctor_Base: 3025 Out << "C2"; 3026 break; 3027 case Ctor_CompleteAllocating: 3028 Out << "C3"; 3029 break; 3030 } 3031} 3032 3033void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) { 3034 // <ctor-dtor-name> ::= D0 # deleting destructor 3035 // ::= D1 # complete object destructor 3036 // ::= D2 # base object destructor 3037 // 3038 switch (T) { 3039 case Dtor_Deleting: 3040 Out << "D0"; 3041 break; 3042 case Dtor_Complete: 3043 Out << "D1"; 3044 break; 3045 case Dtor_Base: 3046 Out << "D2"; 3047 break; 3048 } 3049} 3050 3051void CXXNameMangler::mangleTemplateArgs( 3052 const ASTTemplateArgumentListInfo &TemplateArgs) { 3053 // <template-args> ::= I <template-arg>+ E 3054 Out << 'I'; 3055 for (unsigned i = 0, e = TemplateArgs.NumTemplateArgs; i != e; ++i) 3056 mangleTemplateArg(TemplateArgs.getTemplateArgs()[i].getArgument()); 3057 Out << 'E'; 3058} 3059 3060void CXXNameMangler::mangleTemplateArgs(const TemplateArgumentList &AL) { 3061 // <template-args> ::= I <template-arg>+ E 3062 Out << 'I'; 3063 for (unsigned i = 0, e = AL.size(); i != e; ++i) 3064 mangleTemplateArg(AL[i]); 3065 Out << 'E'; 3066} 3067 3068void CXXNameMangler::mangleTemplateArgs(const TemplateArgument *TemplateArgs, 3069 unsigned NumTemplateArgs) { 3070 // <template-args> ::= I <template-arg>+ E 3071 Out << 'I'; 3072 for (unsigned i = 0; i != NumTemplateArgs; ++i) 3073 mangleTemplateArg(TemplateArgs[i]); 3074 Out << 'E'; 3075} 3076 3077void CXXNameMangler::mangleTemplateArg(TemplateArgument A) { 3078 // <template-arg> ::= <type> # type or template 3079 // ::= X <expression> E # expression 3080 // ::= <expr-primary> # simple expressions 3081 // ::= J <template-arg>* E # argument pack 3082 // ::= sp <expression> # pack expansion of (C++0x) 3083 if (!A.isInstantiationDependent() || A.isDependent()) 3084 A = Context.getASTContext().getCanonicalTemplateArgument(A); 3085 3086 switch (A.getKind()) { 3087 case TemplateArgument::Null: 3088 llvm_unreachable("Cannot mangle NULL template argument"); 3089 3090 case TemplateArgument::Type: 3091 mangleType(A.getAsType()); 3092 break; 3093 case TemplateArgument::Template: 3094 // This is mangled as <type>. 3095 mangleType(A.getAsTemplate()); 3096 break; 3097 case TemplateArgument::TemplateExpansion: 3098 // <type> ::= Dp <type> # pack expansion (C++0x) 3099 Out << "Dp"; 3100 mangleType(A.getAsTemplateOrTemplatePattern()); 3101 break; 3102 case TemplateArgument::Expression: { 3103 // It's possible to end up with a DeclRefExpr here in certain 3104 // dependent cases, in which case we should mangle as a 3105 // declaration. 3106 const Expr *E = A.getAsExpr()->IgnoreParens(); 3107 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 3108 const ValueDecl *D = DRE->getDecl(); 3109 if (isa<VarDecl>(D) || isa<FunctionDecl>(D)) { 3110 Out << "L"; 3111 mangle(D, "_Z"); 3112 Out << 'E'; 3113 break; 3114 } 3115 } 3116 3117 Out << 'X'; 3118 mangleExpression(E); 3119 Out << 'E'; 3120 break; 3121 } 3122 case TemplateArgument::Integral: 3123 mangleIntegerLiteral(A.getIntegralType(), A.getAsIntegral()); 3124 break; 3125 case TemplateArgument::Declaration: { 3126 // <expr-primary> ::= L <mangled-name> E # external name 3127 // Clang produces AST's where pointer-to-member-function expressions 3128 // and pointer-to-function expressions are represented as a declaration not 3129 // an expression. We compensate for it here to produce the correct mangling. 3130 ValueDecl *D = A.getAsDecl(); 3131 bool compensateMangling = !A.isDeclForReferenceParam(); 3132 if (compensateMangling) { 3133 Out << 'X'; 3134 mangleOperatorName(OO_Amp, 1); 3135 } 3136 3137 Out << 'L'; 3138 // References to external entities use the mangled name; if the name would 3139 // not normally be manged then mangle it as unqualified. 3140 // 3141 // FIXME: The ABI specifies that external names here should have _Z, but 3142 // gcc leaves this off. 3143 if (compensateMangling) 3144 mangle(D, "_Z"); 3145 else 3146 mangle(D, "Z"); 3147 Out << 'E'; 3148 3149 if (compensateMangling) 3150 Out << 'E'; 3151 3152 break; 3153 } 3154 case TemplateArgument::NullPtr: { 3155 // <expr-primary> ::= L <type> 0 E 3156 Out << 'L'; 3157 mangleType(A.getNullPtrType()); 3158 Out << "0E"; 3159 break; 3160 } 3161 case TemplateArgument::Pack: { 3162 // Note: proposal by Mike Herrick on 12/20/10 3163 Out << 'J'; 3164 for (TemplateArgument::pack_iterator PA = A.pack_begin(), 3165 PAEnd = A.pack_end(); 3166 PA != PAEnd; ++PA) 3167 mangleTemplateArg(*PA); 3168 Out << 'E'; 3169 } 3170 } 3171} 3172 3173void CXXNameMangler::mangleTemplateParameter(unsigned Index) { 3174 // <template-param> ::= T_ # first template parameter 3175 // ::= T <parameter-2 non-negative number> _ 3176 if (Index == 0) 3177 Out << "T_"; 3178 else 3179 Out << 'T' << (Index - 1) << '_'; 3180} 3181 3182void CXXNameMangler::mangleExistingSubstitution(QualType type) { 3183 bool result = mangleSubstitution(type); 3184 assert(result && "no existing substitution for type"); 3185 (void) result; 3186} 3187 3188void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) { 3189 bool result = mangleSubstitution(tname); 3190 assert(result && "no existing substitution for template name"); 3191 (void) result; 3192} 3193 3194// <substitution> ::= S <seq-id> _ 3195// ::= S_ 3196bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) { 3197 // Try one of the standard substitutions first. 3198 if (mangleStandardSubstitution(ND)) 3199 return true; 3200 3201 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 3202 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND)); 3203} 3204 3205/// \brief Determine whether the given type has any qualifiers that are 3206/// relevant for substitutions. 3207static bool hasMangledSubstitutionQualifiers(QualType T) { 3208 Qualifiers Qs = T.getQualifiers(); 3209 return Qs.getCVRQualifiers() || Qs.hasAddressSpace(); 3210} 3211 3212bool CXXNameMangler::mangleSubstitution(QualType T) { 3213 if (!hasMangledSubstitutionQualifiers(T)) { 3214 if (const RecordType *RT = T->getAs<RecordType>()) 3215 return mangleSubstitution(RT->getDecl()); 3216 } 3217 3218 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 3219 3220 return mangleSubstitution(TypePtr); 3221} 3222 3223bool CXXNameMangler::mangleSubstitution(TemplateName Template) { 3224 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 3225 return mangleSubstitution(TD); 3226 3227 Template = Context.getASTContext().getCanonicalTemplateName(Template); 3228 return mangleSubstitution( 3229 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 3230} 3231 3232bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) { 3233 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr); 3234 if (I == Substitutions.end()) 3235 return false; 3236 3237 unsigned SeqID = I->second; 3238 if (SeqID == 0) 3239 Out << "S_"; 3240 else { 3241 SeqID--; 3242 3243 // <seq-id> is encoded in base-36, using digits and upper case letters. 3244 char Buffer[10]; 3245 char *BufferPtr = llvm::array_endof(Buffer); 3246 3247 if (SeqID == 0) *--BufferPtr = '0'; 3248 3249 while (SeqID) { 3250 assert(BufferPtr > Buffer && "Buffer overflow!"); 3251 3252 char c = static_cast<char>(SeqID % 36); 3253 3254 *--BufferPtr = (c < 10 ? '0' + c : 'A' + c - 10); 3255 SeqID /= 36; 3256 } 3257 3258 Out << 'S' 3259 << StringRef(BufferPtr, llvm::array_endof(Buffer)-BufferPtr) 3260 << '_'; 3261 } 3262 3263 return true; 3264} 3265 3266static bool isCharType(QualType T) { 3267 if (T.isNull()) 3268 return false; 3269 3270 return T->isSpecificBuiltinType(BuiltinType::Char_S) || 3271 T->isSpecificBuiltinType(BuiltinType::Char_U); 3272} 3273 3274/// isCharSpecialization - Returns whether a given type is a template 3275/// specialization of a given name with a single argument of type char. 3276static bool isCharSpecialization(QualType T, const char *Name) { 3277 if (T.isNull()) 3278 return false; 3279 3280 const RecordType *RT = T->getAs<RecordType>(); 3281 if (!RT) 3282 return false; 3283 3284 const ClassTemplateSpecializationDecl *SD = 3285 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); 3286 if (!SD) 3287 return false; 3288 3289 if (!isStdNamespace(getEffectiveDeclContext(SD))) 3290 return false; 3291 3292 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3293 if (TemplateArgs.size() != 1) 3294 return false; 3295 3296 if (!isCharType(TemplateArgs[0].getAsType())) 3297 return false; 3298 3299 return SD->getIdentifier()->getName() == Name; 3300} 3301 3302template <std::size_t StrLen> 3303static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD, 3304 const char (&Str)[StrLen]) { 3305 if (!SD->getIdentifier()->isStr(Str)) 3306 return false; 3307 3308 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3309 if (TemplateArgs.size() != 2) 3310 return false; 3311 3312 if (!isCharType(TemplateArgs[0].getAsType())) 3313 return false; 3314 3315 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3316 return false; 3317 3318 return true; 3319} 3320 3321bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) { 3322 // <substitution> ::= St # ::std:: 3323 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 3324 if (isStd(NS)) { 3325 Out << "St"; 3326 return true; 3327 } 3328 } 3329 3330 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) { 3331 if (!isStdNamespace(getEffectiveDeclContext(TD))) 3332 return false; 3333 3334 // <substitution> ::= Sa # ::std::allocator 3335 if (TD->getIdentifier()->isStr("allocator")) { 3336 Out << "Sa"; 3337 return true; 3338 } 3339 3340 // <<substitution> ::= Sb # ::std::basic_string 3341 if (TD->getIdentifier()->isStr("basic_string")) { 3342 Out << "Sb"; 3343 return true; 3344 } 3345 } 3346 3347 if (const ClassTemplateSpecializationDecl *SD = 3348 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 3349 if (!isStdNamespace(getEffectiveDeclContext(SD))) 3350 return false; 3351 3352 // <substitution> ::= Ss # ::std::basic_string<char, 3353 // ::std::char_traits<char>, 3354 // ::std::allocator<char> > 3355 if (SD->getIdentifier()->isStr("basic_string")) { 3356 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3357 3358 if (TemplateArgs.size() != 3) 3359 return false; 3360 3361 if (!isCharType(TemplateArgs[0].getAsType())) 3362 return false; 3363 3364 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3365 return false; 3366 3367 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator")) 3368 return false; 3369 3370 Out << "Ss"; 3371 return true; 3372 } 3373 3374 // <substitution> ::= Si # ::std::basic_istream<char, 3375 // ::std::char_traits<char> > 3376 if (isStreamCharSpecialization(SD, "basic_istream")) { 3377 Out << "Si"; 3378 return true; 3379 } 3380 3381 // <substitution> ::= So # ::std::basic_ostream<char, 3382 // ::std::char_traits<char> > 3383 if (isStreamCharSpecialization(SD, "basic_ostream")) { 3384 Out << "So"; 3385 return true; 3386 } 3387 3388 // <substitution> ::= Sd # ::std::basic_iostream<char, 3389 // ::std::char_traits<char> > 3390 if (isStreamCharSpecialization(SD, "basic_iostream")) { 3391 Out << "Sd"; 3392 return true; 3393 } 3394 } 3395 return false; 3396} 3397 3398void CXXNameMangler::addSubstitution(QualType T) { 3399 if (!hasMangledSubstitutionQualifiers(T)) { 3400 if (const RecordType *RT = T->getAs<RecordType>()) { 3401 addSubstitution(RT->getDecl()); 3402 return; 3403 } 3404 } 3405 3406 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 3407 addSubstitution(TypePtr); 3408} 3409 3410void CXXNameMangler::addSubstitution(TemplateName Template) { 3411 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 3412 return addSubstitution(TD); 3413 3414 Template = Context.getASTContext().getCanonicalTemplateName(Template); 3415 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 3416} 3417 3418void CXXNameMangler::addSubstitution(uintptr_t Ptr) { 3419 assert(!Substitutions.count(Ptr) && "Substitution already exists!"); 3420 Substitutions[Ptr] = SeqID++; 3421} 3422 3423// 3424 3425/// \brief Mangles the name of the declaration D and emits that name to the 3426/// given output stream. 3427/// 3428/// If the declaration D requires a mangled name, this routine will emit that 3429/// mangled name to \p os and return true. Otherwise, \p os will be unchanged 3430/// and this routine will return false. In this case, the caller should just 3431/// emit the identifier of the declaration (\c D->getIdentifier()) as its 3432/// name. 3433void ItaniumMangleContext::mangleName(const NamedDecl *D, 3434 raw_ostream &Out) { 3435 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) && 3436 "Invalid mangleName() call, argument is not a variable or function!"); 3437 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) && 3438 "Invalid mangleName() call on 'structor decl!"); 3439 3440 PrettyStackTraceDecl CrashInfo(D, SourceLocation(), 3441 getASTContext().getSourceManager(), 3442 "Mangling declaration"); 3443 3444 CXXNameMangler Mangler(*this, Out, D); 3445 return Mangler.mangle(D); 3446} 3447 3448void ItaniumMangleContext::mangleCXXCtor(const CXXConstructorDecl *D, 3449 CXXCtorType Type, 3450 raw_ostream &Out) { 3451 CXXNameMangler Mangler(*this, Out, D, Type); 3452 Mangler.mangle(D); 3453} 3454 3455void ItaniumMangleContext::mangleCXXDtor(const CXXDestructorDecl *D, 3456 CXXDtorType Type, 3457 raw_ostream &Out) { 3458 CXXNameMangler Mangler(*this, Out, D, Type); 3459 Mangler.mangle(D); 3460} 3461 3462void ItaniumMangleContext::mangleThunk(const CXXMethodDecl *MD, 3463 const ThunkInfo &Thunk, 3464 raw_ostream &Out) { 3465 // <special-name> ::= T <call-offset> <base encoding> 3466 // # base is the nominal target function of thunk 3467 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding> 3468 // # base is the nominal target function of thunk 3469 // # first call-offset is 'this' adjustment 3470 // # second call-offset is result adjustment 3471 3472 assert(!isa<CXXDestructorDecl>(MD) && 3473 "Use mangleCXXDtor for destructor decls!"); 3474 CXXNameMangler Mangler(*this, Out); 3475 Mangler.getStream() << "_ZT"; 3476 if (!Thunk.Return.isEmpty()) 3477 Mangler.getStream() << 'c'; 3478 3479 // Mangle the 'this' pointer adjustment. 3480 Mangler.mangleCallOffset(Thunk.This.NonVirtual, Thunk.This.VCallOffsetOffset); 3481 3482 // Mangle the return pointer adjustment if there is one. 3483 if (!Thunk.Return.isEmpty()) 3484 Mangler.mangleCallOffset(Thunk.Return.NonVirtual, 3485 Thunk.Return.VBaseOffsetOffset); 3486 3487 Mangler.mangleFunctionEncoding(MD); 3488} 3489 3490void 3491ItaniumMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD, 3492 CXXDtorType Type, 3493 const ThisAdjustment &ThisAdjustment, 3494 raw_ostream &Out) { 3495 // <special-name> ::= T <call-offset> <base encoding> 3496 // # base is the nominal target function of thunk 3497 CXXNameMangler Mangler(*this, Out, DD, Type); 3498 Mangler.getStream() << "_ZT"; 3499 3500 // Mangle the 'this' pointer adjustment. 3501 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual, 3502 ThisAdjustment.VCallOffsetOffset); 3503 3504 Mangler.mangleFunctionEncoding(DD); 3505} 3506 3507/// mangleGuardVariable - Returns the mangled name for a guard variable 3508/// for the passed in VarDecl. 3509void ItaniumMangleContext::mangleItaniumGuardVariable(const VarDecl *D, 3510 raw_ostream &Out) { 3511 // <special-name> ::= GV <object name> # Guard variable for one-time 3512 // # initialization 3513 CXXNameMangler Mangler(*this, Out); 3514 Mangler.getStream() << "_ZGV"; 3515 Mangler.mangleName(D); 3516} 3517 3518void ItaniumMangleContext::mangleReferenceTemporary(const VarDecl *D, 3519 raw_ostream &Out) { 3520 // We match the GCC mangling here. 3521 // <special-name> ::= GR <object name> 3522 CXXNameMangler Mangler(*this, Out); 3523 Mangler.getStream() << "_ZGR"; 3524 Mangler.mangleName(D); 3525} 3526 3527void ItaniumMangleContext::mangleCXXVTable(const CXXRecordDecl *RD, 3528 raw_ostream &Out) { 3529 // <special-name> ::= TV <type> # virtual table 3530 CXXNameMangler Mangler(*this, Out); 3531 Mangler.getStream() << "_ZTV"; 3532 Mangler.mangleNameOrStandardSubstitution(RD); 3533} 3534 3535void ItaniumMangleContext::mangleCXXVTT(const CXXRecordDecl *RD, 3536 raw_ostream &Out) { 3537 // <special-name> ::= TT <type> # VTT structure 3538 CXXNameMangler Mangler(*this, Out); 3539 Mangler.getStream() << "_ZTT"; 3540 Mangler.mangleNameOrStandardSubstitution(RD); 3541} 3542 3543void ItaniumMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD, 3544 int64_t Offset, 3545 const CXXRecordDecl *Type, 3546 raw_ostream &Out) { 3547 // <special-name> ::= TC <type> <offset number> _ <base type> 3548 CXXNameMangler Mangler(*this, Out); 3549 Mangler.getStream() << "_ZTC"; 3550 Mangler.mangleNameOrStandardSubstitution(RD); 3551 Mangler.getStream() << Offset; 3552 Mangler.getStream() << '_'; 3553 Mangler.mangleNameOrStandardSubstitution(Type); 3554} 3555 3556void ItaniumMangleContext::mangleCXXRTTI(QualType Ty, 3557 raw_ostream &Out) { 3558 // <special-name> ::= TI <type> # typeinfo structure 3559 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers"); 3560 CXXNameMangler Mangler(*this, Out); 3561 Mangler.getStream() << "_ZTI"; 3562 Mangler.mangleType(Ty); 3563} 3564 3565void ItaniumMangleContext::mangleCXXRTTIName(QualType Ty, 3566 raw_ostream &Out) { 3567 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string) 3568 CXXNameMangler Mangler(*this, Out); 3569 Mangler.getStream() << "_ZTS"; 3570 Mangler.mangleType(Ty); 3571} 3572 3573MangleContext *clang::createItaniumMangleContext(ASTContext &Context, 3574 DiagnosticsEngine &Diags) { 3575 return new ItaniumMangleContext(Context, Diags); 3576} 3577