ItaniumMangle.cpp revision 76da55d3a49e1805f51b1ced7c5da5bcd7f759d8
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/Attr.h" 20#include "clang/AST/Decl.h" 21#include "clang/AST/DeclCXX.h" 22#include "clang/AST/DeclObjC.h" 23#include "clang/AST/DeclTemplate.h" 24#include "clang/AST/ExprCXX.h" 25#include "clang/AST/ExprObjC.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/ABI.h" 28#include "clang/Basic/SourceManager.h" 29#include "clang/Basic/TargetInfo.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/ErrorHandling.h" 32#include "llvm/Support/raw_ostream.h" 33 34#define MANGLE_CHECKER 0 35 36#if MANGLE_CHECKER 37#include <cxxabi.h> 38#endif 39 40using namespace clang; 41 42namespace { 43 44/// \brief Retrieve the declaration context that should be used when mangling 45/// the given declaration. 46static const DeclContext *getEffectiveDeclContext(const Decl *D) { 47 // The ABI assumes that lambda closure types that occur within 48 // default arguments live in the context of the function. However, due to 49 // the way in which Clang parses and creates function declarations, this is 50 // not the case: the lambda closure type ends up living in the context 51 // where the function itself resides, because the function declaration itself 52 // had not yet been created. Fix the context here. 53 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) { 54 if (RD->isLambda()) 55 if (ParmVarDecl *ContextParam 56 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl())) 57 return ContextParam->getDeclContext(); 58 } 59 60 return D->getDeclContext(); 61} 62 63static const DeclContext *getEffectiveParentContext(const DeclContext *DC) { 64 return getEffectiveDeclContext(cast<Decl>(DC)); 65} 66 67static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) { 68 const DeclContext *DC = dyn_cast<DeclContext>(ND); 69 if (!DC) 70 DC = getEffectiveDeclContext(ND); 71 while (!DC->isNamespace() && !DC->isTranslationUnit()) { 72 const DeclContext *Parent = getEffectiveDeclContext(cast<Decl>(DC)); 73 if (isa<FunctionDecl>(Parent)) 74 return dyn_cast<CXXRecordDecl>(DC); 75 DC = Parent; 76 } 77 return 0; 78} 79 80static const FunctionDecl *getStructor(const FunctionDecl *fn) { 81 if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate()) 82 return ftd->getTemplatedDecl(); 83 84 return fn; 85} 86 87static const NamedDecl *getStructor(const NamedDecl *decl) { 88 const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl); 89 return (fn ? getStructor(fn) : decl); 90} 91 92static const unsigned UnknownArity = ~0U; 93 94class ItaniumMangleContext : public MangleContext { 95 llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds; 96 unsigned Discriminator; 97 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier; 98 99public: 100 explicit ItaniumMangleContext(ASTContext &Context, 101 DiagnosticsEngine &Diags) 102 : MangleContext(Context, Diags) { } 103 104 uint64_t getAnonymousStructId(const TagDecl *TD) { 105 std::pair<llvm::DenseMap<const TagDecl *, 106 uint64_t>::iterator, bool> Result = 107 AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size())); 108 return Result.first->second; 109 } 110 111 void startNewFunction() { 112 MangleContext::startNewFunction(); 113 mangleInitDiscriminator(); 114 } 115 116 /// @name Mangler Entry Points 117 /// @{ 118 119 bool shouldMangleDeclName(const NamedDecl *D); 120 void mangleName(const NamedDecl *D, raw_ostream &); 121 void mangleThunk(const CXXMethodDecl *MD, 122 const ThunkInfo &Thunk, 123 raw_ostream &); 124 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, 125 const ThisAdjustment &ThisAdjustment, 126 raw_ostream &); 127 void mangleReferenceTemporary(const VarDecl *D, 128 raw_ostream &); 129 void mangleCXXVTable(const CXXRecordDecl *RD, 130 raw_ostream &); 131 void mangleCXXVTT(const CXXRecordDecl *RD, 132 raw_ostream &); 133 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset, 134 const CXXRecordDecl *Type, 135 raw_ostream &); 136 void mangleCXXRTTI(QualType T, raw_ostream &); 137 void mangleCXXRTTIName(QualType T, raw_ostream &); 138 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type, 139 raw_ostream &); 140 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type, 141 raw_ostream &); 142 143 void mangleItaniumGuardVariable(const VarDecl *D, raw_ostream &); 144 145 void mangleInitDiscriminator() { 146 Discriminator = 0; 147 } 148 149 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) { 150 // Lambda closure types with external linkage (indicated by a 151 // non-zero lambda mangling number) have their own numbering scheme, so 152 // they do not need a discriminator. 153 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(ND)) 154 if (RD->isLambda() && RD->getLambdaManglingNumber() > 0) 155 return false; 156 157 unsigned &discriminator = Uniquifier[ND]; 158 if (!discriminator) 159 discriminator = ++Discriminator; 160 if (discriminator == 1) 161 return false; 162 disc = discriminator-2; 163 return true; 164 } 165 /// @} 166}; 167 168/// CXXNameMangler - Manage the mangling of a single name. 169class CXXNameMangler { 170 ItaniumMangleContext &Context; 171 raw_ostream &Out; 172 173 /// The "structor" is the top-level declaration being mangled, if 174 /// that's not a template specialization; otherwise it's the pattern 175 /// for that specialization. 176 const NamedDecl *Structor; 177 unsigned StructorType; 178 179 /// SeqID - The next subsitution sequence number. 180 unsigned SeqID; 181 182 class FunctionTypeDepthState { 183 unsigned Bits; 184 185 enum { InResultTypeMask = 1 }; 186 187 public: 188 FunctionTypeDepthState() : Bits(0) {} 189 190 /// The number of function types we're inside. 191 unsigned getDepth() const { 192 return Bits >> 1; 193 } 194 195 /// True if we're in the return type of the innermost function type. 196 bool isInResultType() const { 197 return Bits & InResultTypeMask; 198 } 199 200 FunctionTypeDepthState push() { 201 FunctionTypeDepthState tmp = *this; 202 Bits = (Bits & ~InResultTypeMask) + 2; 203 return tmp; 204 } 205 206 void enterResultType() { 207 Bits |= InResultTypeMask; 208 } 209 210 void leaveResultType() { 211 Bits &= ~InResultTypeMask; 212 } 213 214 void pop(FunctionTypeDepthState saved) { 215 assert(getDepth() == saved.getDepth() + 1); 216 Bits = saved.Bits; 217 } 218 219 } FunctionTypeDepth; 220 221 llvm::DenseMap<uintptr_t, unsigned> Substitutions; 222 223 ASTContext &getASTContext() const { return Context.getASTContext(); } 224 225public: 226 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 227 const NamedDecl *D = 0) 228 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(0), 229 SeqID(0) { 230 // These can't be mangled without a ctor type or dtor type. 231 assert(!D || (!isa<CXXDestructorDecl>(D) && 232 !isa<CXXConstructorDecl>(D))); 233 } 234 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 235 const CXXConstructorDecl *D, CXXCtorType Type) 236 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 237 SeqID(0) { } 238 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 239 const CXXDestructorDecl *D, CXXDtorType Type) 240 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 241 SeqID(0) { } 242 243#if MANGLE_CHECKER 244 ~CXXNameMangler() { 245 if (Out.str()[0] == '\01') 246 return; 247 248 int status = 0; 249 char *result = abi::__cxa_demangle(Out.str().str().c_str(), 0, 0, &status); 250 assert(status == 0 && "Could not demangle mangled name!"); 251 free(result); 252 } 253#endif 254 raw_ostream &getStream() { return Out; } 255 256 void mangle(const NamedDecl *D, StringRef Prefix = "_Z"); 257 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual); 258 void mangleNumber(const llvm::APSInt &I); 259 void mangleNumber(int64_t Number); 260 void mangleFloat(const llvm::APFloat &F); 261 void mangleFunctionEncoding(const FunctionDecl *FD); 262 void mangleName(const NamedDecl *ND); 263 void mangleType(QualType T); 264 void mangleNameOrStandardSubstitution(const NamedDecl *ND); 265 266private: 267 bool mangleSubstitution(const NamedDecl *ND); 268 bool mangleSubstitution(QualType T); 269 bool mangleSubstitution(TemplateName Template); 270 bool mangleSubstitution(uintptr_t Ptr); 271 272 void mangleExistingSubstitution(QualType type); 273 void mangleExistingSubstitution(TemplateName name); 274 275 bool mangleStandardSubstitution(const NamedDecl *ND); 276 277 void addSubstitution(const NamedDecl *ND) { 278 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 279 280 addSubstitution(reinterpret_cast<uintptr_t>(ND)); 281 } 282 void addSubstitution(QualType T); 283 void addSubstitution(TemplateName Template); 284 void addSubstitution(uintptr_t Ptr); 285 286 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier, 287 NamedDecl *firstQualifierLookup, 288 bool recursive = false); 289 void mangleUnresolvedName(NestedNameSpecifier *qualifier, 290 NamedDecl *firstQualifierLookup, 291 DeclarationName name, 292 unsigned KnownArity = UnknownArity); 293 294 void mangleName(const TemplateDecl *TD, 295 const TemplateArgument *TemplateArgs, 296 unsigned NumTemplateArgs); 297 void mangleUnqualifiedName(const NamedDecl *ND) { 298 mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity); 299 } 300 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name, 301 unsigned KnownArity); 302 void mangleUnscopedName(const NamedDecl *ND); 303 void mangleUnscopedTemplateName(const TemplateDecl *ND); 304 void mangleUnscopedTemplateName(TemplateName); 305 void mangleSourceName(const IdentifierInfo *II); 306 void mangleLocalName(const NamedDecl *ND); 307 void mangleLambda(const CXXRecordDecl *Lambda); 308 void mangleNestedName(const NamedDecl *ND, const DeclContext *DC, 309 bool NoFunction=false); 310 void mangleNestedName(const TemplateDecl *TD, 311 const TemplateArgument *TemplateArgs, 312 unsigned NumTemplateArgs); 313 void manglePrefix(NestedNameSpecifier *qualifier); 314 void manglePrefix(const DeclContext *DC, bool NoFunction=false); 315 void manglePrefix(QualType type); 316 void mangleTemplatePrefix(const TemplateDecl *ND); 317 void mangleTemplatePrefix(TemplateName Template); 318 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity); 319 void mangleQualifiers(Qualifiers Quals); 320 void mangleRefQualifier(RefQualifierKind RefQualifier); 321 322 void mangleObjCMethodName(const ObjCMethodDecl *MD); 323 324 // Declare manglers for every type class. 325#define ABSTRACT_TYPE(CLASS, PARENT) 326#define NON_CANONICAL_TYPE(CLASS, PARENT) 327#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T); 328#include "clang/AST/TypeNodes.def" 329 330 void mangleType(const TagType*); 331 void mangleType(TemplateName); 332 void mangleBareFunctionType(const FunctionType *T, 333 bool MangleReturnType); 334 void mangleNeonVectorType(const VectorType *T); 335 336 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value); 337 void mangleMemberExpr(const Expr *base, bool isArrow, 338 NestedNameSpecifier *qualifier, 339 NamedDecl *firstQualifierLookup, 340 DeclarationName name, 341 unsigned knownArity); 342 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity); 343 void mangleCXXCtorType(CXXCtorType T); 344 void mangleCXXDtorType(CXXDtorType T); 345 346 void mangleTemplateArgs(const ASTTemplateArgumentListInfo &TemplateArgs); 347 void mangleTemplateArgs(const TemplateArgument *TemplateArgs, 348 unsigned NumTemplateArgs); 349 void mangleTemplateArgs(const TemplateArgumentList &AL); 350 void mangleTemplateArg(TemplateArgument A); 351 352 void mangleTemplateParameter(unsigned Index); 353 354 void mangleFunctionParam(const ParmVarDecl *parm); 355}; 356 357} 358 359bool ItaniumMangleContext::shouldMangleDeclName(const NamedDecl *D) { 360 // In C, functions with no attributes never need to be mangled. Fastpath them. 361 if (!getASTContext().getLangOpts().CPlusPlus && !D->hasAttrs()) 362 return false; 363 364 // Any decl can be declared with __asm("foo") on it, and this takes precedence 365 // over all other naming in the .o file. 366 if (D->hasAttr<AsmLabelAttr>()) 367 return true; 368 369 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D); 370 if (FD) { 371 LanguageLinkage L = FD->getLanguageLinkage(); 372 // Overloadable functions need mangling. 373 if (FD->hasAttr<OverloadableAttr>()) 374 return true; 375 376 // "main" is not mangled. 377 if (FD->isMain()) 378 return false; 379 380 // C++ functions and those whose names are not a simple identifier need 381 // mangling. 382 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage) 383 return true; 384 385 // C functions are not mangled. 386 if (L == CLanguageLinkage) 387 return false; 388 } 389 390 // Otherwise, no mangling is done outside C++ mode. 391 if (!getASTContext().getLangOpts().CPlusPlus) 392 return false; 393 394 const VarDecl *VD = dyn_cast<VarDecl>(D); 395 if (VD) { 396 // C variables are not mangled. 397 if (VD->isExternC()) 398 return false; 399 400 // Variables at global scope with non-internal linkage are not mangled 401 const DeclContext *DC = getEffectiveDeclContext(D); 402 // Check for extern variable declared locally. 403 if (DC->isFunctionOrMethod() && D->hasLinkage()) 404 while (!DC->isNamespace() && !DC->isTranslationUnit()) 405 DC = getEffectiveParentContext(DC); 406 if (DC->isTranslationUnit() && D->getLinkage() != InternalLinkage) 407 return false; 408 } 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 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 // Class extensions have no name as a category, and it's possible 1100 // for them to be the semantic parent of certain declarations 1101 // (primarily, tag decls defined within declarations). Such 1102 // declarations will always have internal linkage, so the name 1103 // doesn't really matter, but we shouldn't crash on them. For 1104 // safety, just handle all ObjC containers here. 1105 if (isa<ObjCContainerDecl>(ND)) 1106 break; 1107 1108 // We must have an anonymous struct. 1109 const TagDecl *TD = cast<TagDecl>(ND); 1110 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) { 1111 assert(TD->getDeclContext() == D->getDeclContext() && 1112 "Typedef should not be in another decl context!"); 1113 assert(D->getDeclName().getAsIdentifierInfo() && 1114 "Typedef was not named!"); 1115 mangleSourceName(D->getDeclName().getAsIdentifierInfo()); 1116 break; 1117 } 1118 1119 // <unnamed-type-name> ::= <closure-type-name> 1120 // 1121 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _ 1122 // <lambda-sig> ::= <parameter-type>+ # Parameter types or 'v' for 'void'. 1123 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) { 1124 if (Record->isLambda() && Record->getLambdaManglingNumber()) { 1125 mangleLambda(Record); 1126 break; 1127 } 1128 } 1129 1130 int UnnamedMangle = Context.getASTContext().getUnnamedTagManglingNumber(TD); 1131 if (UnnamedMangle != -1) { 1132 Out << "Ut"; 1133 if (UnnamedMangle != 0) 1134 Out << llvm::utostr(UnnamedMangle - 1); 1135 Out << '_'; 1136 break; 1137 } 1138 1139 // Get a unique id for the anonymous struct. 1140 uint64_t AnonStructId = Context.getAnonymousStructId(TD); 1141 1142 // Mangle it as a source name in the form 1143 // [n] $_<id> 1144 // where n is the length of the string. 1145 SmallString<8> Str; 1146 Str += "$_"; 1147 Str += llvm::utostr(AnonStructId); 1148 1149 Out << Str.size(); 1150 Out << Str.str(); 1151 break; 1152 } 1153 1154 case DeclarationName::ObjCZeroArgSelector: 1155 case DeclarationName::ObjCOneArgSelector: 1156 case DeclarationName::ObjCMultiArgSelector: 1157 llvm_unreachable("Can't mangle Objective-C selector names here!"); 1158 1159 case DeclarationName::CXXConstructorName: 1160 if (ND == Structor) 1161 // If the named decl is the C++ constructor we're mangling, use the type 1162 // we were given. 1163 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType)); 1164 else 1165 // Otherwise, use the complete constructor name. This is relevant if a 1166 // class with a constructor is declared within a constructor. 1167 mangleCXXCtorType(Ctor_Complete); 1168 break; 1169 1170 case DeclarationName::CXXDestructorName: 1171 if (ND == Structor) 1172 // If the named decl is the C++ destructor we're mangling, use the type we 1173 // were given. 1174 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType)); 1175 else 1176 // Otherwise, use the complete destructor name. This is relevant if a 1177 // class with a destructor is declared within a destructor. 1178 mangleCXXDtorType(Dtor_Complete); 1179 break; 1180 1181 case DeclarationName::CXXConversionFunctionName: 1182 // <operator-name> ::= cv <type> # (cast) 1183 Out << "cv"; 1184 mangleType(Name.getCXXNameType()); 1185 break; 1186 1187 case DeclarationName::CXXOperatorName: { 1188 unsigned Arity; 1189 if (ND) { 1190 Arity = cast<FunctionDecl>(ND)->getNumParams(); 1191 1192 // If we have a C++ member function, we need to include the 'this' pointer. 1193 // FIXME: This does not make sense for operators that are static, but their 1194 // names stay the same regardless of the arity (operator new for instance). 1195 if (isa<CXXMethodDecl>(ND)) 1196 Arity++; 1197 } else 1198 Arity = KnownArity; 1199 1200 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity); 1201 break; 1202 } 1203 1204 case DeclarationName::CXXLiteralOperatorName: 1205 // FIXME: This mangling is not yet official. 1206 Out << "li"; 1207 mangleSourceName(Name.getCXXLiteralIdentifier()); 1208 break; 1209 1210 case DeclarationName::CXXUsingDirective: 1211 llvm_unreachable("Can't mangle a using directive name!"); 1212 } 1213} 1214 1215void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) { 1216 // <source-name> ::= <positive length number> <identifier> 1217 // <number> ::= [n] <non-negative decimal integer> 1218 // <identifier> ::= <unqualified source code identifier> 1219 Out << II->getLength() << II->getName(); 1220} 1221 1222void CXXNameMangler::mangleNestedName(const NamedDecl *ND, 1223 const DeclContext *DC, 1224 bool NoFunction) { 1225 // <nested-name> 1226 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E 1227 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix> 1228 // <template-args> E 1229 1230 Out << 'N'; 1231 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) { 1232 mangleQualifiers(Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 1233 mangleRefQualifier(Method->getRefQualifier()); 1234 } 1235 1236 // Check if we have a template. 1237 const TemplateArgumentList *TemplateArgs = 0; 1238 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 1239 mangleTemplatePrefix(TD); 1240 mangleTemplateArgs(*TemplateArgs); 1241 } 1242 else { 1243 manglePrefix(DC, NoFunction); 1244 mangleUnqualifiedName(ND); 1245 } 1246 1247 Out << 'E'; 1248} 1249void CXXNameMangler::mangleNestedName(const TemplateDecl *TD, 1250 const TemplateArgument *TemplateArgs, 1251 unsigned NumTemplateArgs) { 1252 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E 1253 1254 Out << 'N'; 1255 1256 mangleTemplatePrefix(TD); 1257 mangleTemplateArgs(TemplateArgs, NumTemplateArgs); 1258 1259 Out << 'E'; 1260} 1261 1262void CXXNameMangler::mangleLocalName(const NamedDecl *ND) { 1263 // <local-name> := Z <function encoding> E <entity name> [<discriminator>] 1264 // := Z <function encoding> E s [<discriminator>] 1265 // <local-name> := Z <function encoding> E d [ <parameter number> ] 1266 // _ <entity name> 1267 // <discriminator> := _ <non-negative number> 1268 const DeclContext *DC = getEffectiveDeclContext(ND); 1269 if (isa<ObjCMethodDecl>(DC) && isa<FunctionDecl>(ND)) { 1270 // Don't add objc method name mangling to locally declared function 1271 mangleUnqualifiedName(ND); 1272 return; 1273 } 1274 1275 Out << 'Z'; 1276 1277 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC)) { 1278 mangleObjCMethodName(MD); 1279 } else if (const CXXRecordDecl *RD = GetLocalClassDecl(ND)) { 1280 mangleFunctionEncoding(cast<FunctionDecl>(getEffectiveDeclContext(RD))); 1281 Out << 'E'; 1282 1283 // The parameter number is omitted for the last parameter, 0 for the 1284 // second-to-last parameter, 1 for the third-to-last parameter, etc. The 1285 // <entity name> will of course contain a <closure-type-name>: Its 1286 // numbering will be local to the particular argument in which it appears 1287 // -- other default arguments do not affect its encoding. 1288 bool SkipDiscriminator = false; 1289 if (RD->isLambda()) { 1290 if (const ParmVarDecl *Parm 1291 = dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl())) { 1292 if (const FunctionDecl *Func 1293 = dyn_cast<FunctionDecl>(Parm->getDeclContext())) { 1294 Out << 'd'; 1295 unsigned Num = Func->getNumParams() - Parm->getFunctionScopeIndex(); 1296 if (Num > 1) 1297 mangleNumber(Num - 2); 1298 Out << '_'; 1299 SkipDiscriminator = true; 1300 } 1301 } 1302 } 1303 1304 // Mangle the name relative to the closest enclosing function. 1305 if (ND == RD) // equality ok because RD derived from ND above 1306 mangleUnqualifiedName(ND); 1307 else 1308 mangleNestedName(ND, DC, true /*NoFunction*/); 1309 1310 if (!SkipDiscriminator) { 1311 unsigned disc; 1312 if (Context.getNextDiscriminator(RD, disc)) { 1313 if (disc < 10) 1314 Out << '_' << disc; 1315 else 1316 Out << "__" << disc << '_'; 1317 } 1318 } 1319 1320 return; 1321 } 1322 else 1323 mangleFunctionEncoding(cast<FunctionDecl>(DC)); 1324 1325 Out << 'E'; 1326 mangleUnqualifiedName(ND); 1327} 1328 1329void CXXNameMangler::mangleLambda(const CXXRecordDecl *Lambda) { 1330 // If the context of a closure type is an initializer for a class member 1331 // (static or nonstatic), it is encoded in a qualified name with a final 1332 // <prefix> of the form: 1333 // 1334 // <data-member-prefix> := <member source-name> M 1335 // 1336 // Technically, the data-member-prefix is part of the <prefix>. However, 1337 // since a closure type will always be mangled with a prefix, it's easier 1338 // to emit that last part of the prefix here. 1339 if (Decl *Context = Lambda->getLambdaContextDecl()) { 1340 if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) && 1341 Context->getDeclContext()->isRecord()) { 1342 if (const IdentifierInfo *Name 1343 = cast<NamedDecl>(Context)->getIdentifier()) { 1344 mangleSourceName(Name); 1345 Out << 'M'; 1346 } 1347 } 1348 } 1349 1350 Out << "Ul"; 1351 const FunctionProtoType *Proto = Lambda->getLambdaTypeInfo()->getType()-> 1352 getAs<FunctionProtoType>(); 1353 mangleBareFunctionType(Proto, /*MangleReturnType=*/false); 1354 Out << "E"; 1355 1356 // The number is omitted for the first closure type with a given 1357 // <lambda-sig> in a given context; it is n-2 for the nth closure type 1358 // (in lexical order) with that same <lambda-sig> and context. 1359 // 1360 // The AST keeps track of the number for us. 1361 unsigned Number = Lambda->getLambdaManglingNumber(); 1362 assert(Number > 0 && "Lambda should be mangled as an unnamed class"); 1363 if (Number > 1) 1364 mangleNumber(Number - 2); 1365 Out << '_'; 1366} 1367 1368void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) { 1369 switch (qualifier->getKind()) { 1370 case NestedNameSpecifier::Global: 1371 // nothing 1372 return; 1373 1374 case NestedNameSpecifier::Namespace: 1375 mangleName(qualifier->getAsNamespace()); 1376 return; 1377 1378 case NestedNameSpecifier::NamespaceAlias: 1379 mangleName(qualifier->getAsNamespaceAlias()->getNamespace()); 1380 return; 1381 1382 case NestedNameSpecifier::TypeSpec: 1383 case NestedNameSpecifier::TypeSpecWithTemplate: 1384 manglePrefix(QualType(qualifier->getAsType(), 0)); 1385 return; 1386 1387 case NestedNameSpecifier::Identifier: 1388 // Member expressions can have these without prefixes, but that 1389 // should end up in mangleUnresolvedPrefix instead. 1390 assert(qualifier->getPrefix()); 1391 manglePrefix(qualifier->getPrefix()); 1392 1393 mangleSourceName(qualifier->getAsIdentifier()); 1394 return; 1395 } 1396 1397 llvm_unreachable("unexpected nested name specifier"); 1398} 1399 1400void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) { 1401 // <prefix> ::= <prefix> <unqualified-name> 1402 // ::= <template-prefix> <template-args> 1403 // ::= <template-param> 1404 // ::= # empty 1405 // ::= <substitution> 1406 1407 DC = IgnoreLinkageSpecDecls(DC); 1408 1409 if (DC->isTranslationUnit()) 1410 return; 1411 1412 if (const BlockDecl *Block = dyn_cast<BlockDecl>(DC)) { 1413 manglePrefix(getEffectiveParentContext(DC), NoFunction); 1414 SmallString<64> Name; 1415 llvm::raw_svector_ostream NameStream(Name); 1416 Context.mangleBlock(Block, NameStream); 1417 NameStream.flush(); 1418 Out << Name.size() << Name; 1419 return; 1420 } 1421 1422 const NamedDecl *ND = cast<NamedDecl>(DC); 1423 if (mangleSubstitution(ND)) 1424 return; 1425 1426 // Check if we have a template. 1427 const TemplateArgumentList *TemplateArgs = 0; 1428 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 1429 mangleTemplatePrefix(TD); 1430 mangleTemplateArgs(*TemplateArgs); 1431 } 1432 else if(NoFunction && (isa<FunctionDecl>(ND) || isa<ObjCMethodDecl>(ND))) 1433 return; 1434 else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(ND)) 1435 mangleObjCMethodName(Method); 1436 else { 1437 manglePrefix(getEffectiveDeclContext(ND), NoFunction); 1438 mangleUnqualifiedName(ND); 1439 } 1440 1441 addSubstitution(ND); 1442} 1443 1444void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) { 1445 // <template-prefix> ::= <prefix> <template unqualified-name> 1446 // ::= <template-param> 1447 // ::= <substitution> 1448 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 1449 return mangleTemplatePrefix(TD); 1450 1451 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName()) 1452 manglePrefix(Qualified->getQualifier()); 1453 1454 if (OverloadedTemplateStorage *Overloaded 1455 = Template.getAsOverloadedTemplate()) { 1456 mangleUnqualifiedName(0, (*Overloaded->begin())->getDeclName(), 1457 UnknownArity); 1458 return; 1459 } 1460 1461 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 1462 assert(Dependent && "Unknown template name kind?"); 1463 manglePrefix(Dependent->getQualifier()); 1464 mangleUnscopedTemplateName(Template); 1465} 1466 1467void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) { 1468 // <template-prefix> ::= <prefix> <template unqualified-name> 1469 // ::= <template-param> 1470 // ::= <substitution> 1471 // <template-template-param> ::= <template-param> 1472 // <substitution> 1473 1474 if (mangleSubstitution(ND)) 1475 return; 1476 1477 // <template-template-param> ::= <template-param> 1478 if (const TemplateTemplateParmDecl *TTP 1479 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 1480 mangleTemplateParameter(TTP->getIndex()); 1481 return; 1482 } 1483 1484 manglePrefix(getEffectiveDeclContext(ND)); 1485 mangleUnqualifiedName(ND->getTemplatedDecl()); 1486 addSubstitution(ND); 1487} 1488 1489/// Mangles a template name under the production <type>. Required for 1490/// template template arguments. 1491/// <type> ::= <class-enum-type> 1492/// ::= <template-param> 1493/// ::= <substitution> 1494void CXXNameMangler::mangleType(TemplateName TN) { 1495 if (mangleSubstitution(TN)) 1496 return; 1497 1498 TemplateDecl *TD = 0; 1499 1500 switch (TN.getKind()) { 1501 case TemplateName::QualifiedTemplate: 1502 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl(); 1503 goto HaveDecl; 1504 1505 case TemplateName::Template: 1506 TD = TN.getAsTemplateDecl(); 1507 goto HaveDecl; 1508 1509 HaveDecl: 1510 if (isa<TemplateTemplateParmDecl>(TD)) 1511 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex()); 1512 else 1513 mangleName(TD); 1514 break; 1515 1516 case TemplateName::OverloadedTemplate: 1517 llvm_unreachable("can't mangle an overloaded template name as a <type>"); 1518 1519 case TemplateName::DependentTemplate: { 1520 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName(); 1521 assert(Dependent->isIdentifier()); 1522 1523 // <class-enum-type> ::= <name> 1524 // <name> ::= <nested-name> 1525 mangleUnresolvedPrefix(Dependent->getQualifier(), 0); 1526 mangleSourceName(Dependent->getIdentifier()); 1527 break; 1528 } 1529 1530 case TemplateName::SubstTemplateTemplateParm: { 1531 // Substituted template parameters are mangled as the substituted 1532 // template. This will check for the substitution twice, which is 1533 // fine, but we have to return early so that we don't try to *add* 1534 // the substitution twice. 1535 SubstTemplateTemplateParmStorage *subst 1536 = TN.getAsSubstTemplateTemplateParm(); 1537 mangleType(subst->getReplacement()); 1538 return; 1539 } 1540 1541 case TemplateName::SubstTemplateTemplateParmPack: { 1542 // FIXME: not clear how to mangle this! 1543 // template <template <class> class T...> class A { 1544 // template <template <class> class U...> void foo(B<T,U> x...); 1545 // }; 1546 Out << "_SUBSTPACK_"; 1547 break; 1548 } 1549 } 1550 1551 addSubstitution(TN); 1552} 1553 1554void 1555CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) { 1556 switch (OO) { 1557 // <operator-name> ::= nw # new 1558 case OO_New: Out << "nw"; break; 1559 // ::= na # new[] 1560 case OO_Array_New: Out << "na"; break; 1561 // ::= dl # delete 1562 case OO_Delete: Out << "dl"; break; 1563 // ::= da # delete[] 1564 case OO_Array_Delete: Out << "da"; break; 1565 // ::= ps # + (unary) 1566 // ::= pl # + (binary or unknown) 1567 case OO_Plus: 1568 Out << (Arity == 1? "ps" : "pl"); break; 1569 // ::= ng # - (unary) 1570 // ::= mi # - (binary or unknown) 1571 case OO_Minus: 1572 Out << (Arity == 1? "ng" : "mi"); break; 1573 // ::= ad # & (unary) 1574 // ::= an # & (binary or unknown) 1575 case OO_Amp: 1576 Out << (Arity == 1? "ad" : "an"); break; 1577 // ::= de # * (unary) 1578 // ::= ml # * (binary or unknown) 1579 case OO_Star: 1580 // Use binary when unknown. 1581 Out << (Arity == 1? "de" : "ml"); break; 1582 // ::= co # ~ 1583 case OO_Tilde: Out << "co"; break; 1584 // ::= dv # / 1585 case OO_Slash: Out << "dv"; break; 1586 // ::= rm # % 1587 case OO_Percent: Out << "rm"; break; 1588 // ::= or # | 1589 case OO_Pipe: Out << "or"; break; 1590 // ::= eo # ^ 1591 case OO_Caret: Out << "eo"; break; 1592 // ::= aS # = 1593 case OO_Equal: Out << "aS"; break; 1594 // ::= pL # += 1595 case OO_PlusEqual: Out << "pL"; break; 1596 // ::= mI # -= 1597 case OO_MinusEqual: Out << "mI"; break; 1598 // ::= mL # *= 1599 case OO_StarEqual: Out << "mL"; break; 1600 // ::= dV # /= 1601 case OO_SlashEqual: Out << "dV"; break; 1602 // ::= rM # %= 1603 case OO_PercentEqual: Out << "rM"; break; 1604 // ::= aN # &= 1605 case OO_AmpEqual: Out << "aN"; break; 1606 // ::= oR # |= 1607 case OO_PipeEqual: Out << "oR"; break; 1608 // ::= eO # ^= 1609 case OO_CaretEqual: Out << "eO"; break; 1610 // ::= ls # << 1611 case OO_LessLess: Out << "ls"; break; 1612 // ::= rs # >> 1613 case OO_GreaterGreater: Out << "rs"; break; 1614 // ::= lS # <<= 1615 case OO_LessLessEqual: Out << "lS"; break; 1616 // ::= rS # >>= 1617 case OO_GreaterGreaterEqual: Out << "rS"; break; 1618 // ::= eq # == 1619 case OO_EqualEqual: Out << "eq"; break; 1620 // ::= ne # != 1621 case OO_ExclaimEqual: Out << "ne"; break; 1622 // ::= lt # < 1623 case OO_Less: Out << "lt"; break; 1624 // ::= gt # > 1625 case OO_Greater: Out << "gt"; break; 1626 // ::= le # <= 1627 case OO_LessEqual: Out << "le"; break; 1628 // ::= ge # >= 1629 case OO_GreaterEqual: Out << "ge"; break; 1630 // ::= nt # ! 1631 case OO_Exclaim: Out << "nt"; break; 1632 // ::= aa # && 1633 case OO_AmpAmp: Out << "aa"; break; 1634 // ::= oo # || 1635 case OO_PipePipe: Out << "oo"; break; 1636 // ::= pp # ++ 1637 case OO_PlusPlus: Out << "pp"; break; 1638 // ::= mm # -- 1639 case OO_MinusMinus: Out << "mm"; break; 1640 // ::= cm # , 1641 case OO_Comma: Out << "cm"; break; 1642 // ::= pm # ->* 1643 case OO_ArrowStar: Out << "pm"; break; 1644 // ::= pt # -> 1645 case OO_Arrow: Out << "pt"; break; 1646 // ::= cl # () 1647 case OO_Call: Out << "cl"; break; 1648 // ::= ix # [] 1649 case OO_Subscript: Out << "ix"; break; 1650 1651 // ::= qu # ? 1652 // The conditional operator can't be overloaded, but we still handle it when 1653 // mangling expressions. 1654 case OO_Conditional: Out << "qu"; break; 1655 1656 case OO_None: 1657 case NUM_OVERLOADED_OPERATORS: 1658 llvm_unreachable("Not an overloaded operator"); 1659 } 1660} 1661 1662void CXXNameMangler::mangleQualifiers(Qualifiers Quals) { 1663 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const 1664 if (Quals.hasRestrict()) 1665 Out << 'r'; 1666 if (Quals.hasVolatile()) 1667 Out << 'V'; 1668 if (Quals.hasConst()) 1669 Out << 'K'; 1670 1671 if (Quals.hasAddressSpace()) { 1672 // Extension: 1673 // 1674 // <type> ::= U <address-space-number> 1675 // 1676 // where <address-space-number> is a source name consisting of 'AS' 1677 // followed by the address space <number>. 1678 SmallString<64> ASString; 1679 ASString = "AS" + llvm::utostr_32( 1680 Context.getASTContext().getTargetAddressSpace(Quals.getAddressSpace())); 1681 Out << 'U' << ASString.size() << ASString; 1682 } 1683 1684 StringRef LifetimeName; 1685 switch (Quals.getObjCLifetime()) { 1686 // Objective-C ARC Extension: 1687 // 1688 // <type> ::= U "__strong" 1689 // <type> ::= U "__weak" 1690 // <type> ::= U "__autoreleasing" 1691 case Qualifiers::OCL_None: 1692 break; 1693 1694 case Qualifiers::OCL_Weak: 1695 LifetimeName = "__weak"; 1696 break; 1697 1698 case Qualifiers::OCL_Strong: 1699 LifetimeName = "__strong"; 1700 break; 1701 1702 case Qualifiers::OCL_Autoreleasing: 1703 LifetimeName = "__autoreleasing"; 1704 break; 1705 1706 case Qualifiers::OCL_ExplicitNone: 1707 // The __unsafe_unretained qualifier is *not* mangled, so that 1708 // __unsafe_unretained types in ARC produce the same manglings as the 1709 // equivalent (but, naturally, unqualified) types in non-ARC, providing 1710 // better ABI compatibility. 1711 // 1712 // It's safe to do this because unqualified 'id' won't show up 1713 // in any type signatures that need to be mangled. 1714 break; 1715 } 1716 if (!LifetimeName.empty()) 1717 Out << 'U' << LifetimeName.size() << LifetimeName; 1718} 1719 1720void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) { 1721 // <ref-qualifier> ::= R # lvalue reference 1722 // ::= O # rvalue-reference 1723 // Proposal to Itanium C++ ABI list on 1/26/11 1724 switch (RefQualifier) { 1725 case RQ_None: 1726 break; 1727 1728 case RQ_LValue: 1729 Out << 'R'; 1730 break; 1731 1732 case RQ_RValue: 1733 Out << 'O'; 1734 break; 1735 } 1736} 1737 1738void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) { 1739 Context.mangleObjCMethodName(MD, Out); 1740} 1741 1742void CXXNameMangler::mangleType(QualType T) { 1743 // If our type is instantiation-dependent but not dependent, we mangle 1744 // it as it was written in the source, removing any top-level sugar. 1745 // Otherwise, use the canonical type. 1746 // 1747 // FIXME: This is an approximation of the instantiation-dependent name 1748 // mangling rules, since we should really be using the type as written and 1749 // augmented via semantic analysis (i.e., with implicit conversions and 1750 // default template arguments) for any instantiation-dependent type. 1751 // Unfortunately, that requires several changes to our AST: 1752 // - Instantiation-dependent TemplateSpecializationTypes will need to be 1753 // uniqued, so that we can handle substitutions properly 1754 // - Default template arguments will need to be represented in the 1755 // TemplateSpecializationType, since they need to be mangled even though 1756 // they aren't written. 1757 // - Conversions on non-type template arguments need to be expressed, since 1758 // they can affect the mangling of sizeof/alignof. 1759 if (!T->isInstantiationDependentType() || T->isDependentType()) 1760 T = T.getCanonicalType(); 1761 else { 1762 // Desugar any types that are purely sugar. 1763 do { 1764 // Don't desugar through template specialization types that aren't 1765 // type aliases. We need to mangle the template arguments as written. 1766 if (const TemplateSpecializationType *TST 1767 = dyn_cast<TemplateSpecializationType>(T)) 1768 if (!TST->isTypeAlias()) 1769 break; 1770 1771 QualType Desugared 1772 = T.getSingleStepDesugaredType(Context.getASTContext()); 1773 if (Desugared == T) 1774 break; 1775 1776 T = Desugared; 1777 } while (true); 1778 } 1779 SplitQualType split = T.split(); 1780 Qualifiers quals = split.Quals; 1781 const Type *ty = split.Ty; 1782 1783 bool isSubstitutable = quals || !isa<BuiltinType>(T); 1784 if (isSubstitutable && mangleSubstitution(T)) 1785 return; 1786 1787 // If we're mangling a qualified array type, push the qualifiers to 1788 // the element type. 1789 if (quals && isa<ArrayType>(T)) { 1790 ty = Context.getASTContext().getAsArrayType(T); 1791 quals = Qualifiers(); 1792 1793 // Note that we don't update T: we want to add the 1794 // substitution at the original type. 1795 } 1796 1797 if (quals) { 1798 mangleQualifiers(quals); 1799 // Recurse: even if the qualified type isn't yet substitutable, 1800 // the unqualified type might be. 1801 mangleType(QualType(ty, 0)); 1802 } else { 1803 switch (ty->getTypeClass()) { 1804#define ABSTRACT_TYPE(CLASS, PARENT) 1805#define NON_CANONICAL_TYPE(CLASS, PARENT) \ 1806 case Type::CLASS: \ 1807 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \ 1808 return; 1809#define TYPE(CLASS, PARENT) \ 1810 case Type::CLASS: \ 1811 mangleType(static_cast<const CLASS##Type*>(ty)); \ 1812 break; 1813#include "clang/AST/TypeNodes.def" 1814 } 1815 } 1816 1817 // Add the substitution. 1818 if (isSubstitutable) 1819 addSubstitution(T); 1820} 1821 1822void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) { 1823 if (!mangleStandardSubstitution(ND)) 1824 mangleName(ND); 1825} 1826 1827void CXXNameMangler::mangleType(const BuiltinType *T) { 1828 // <type> ::= <builtin-type> 1829 // <builtin-type> ::= v # void 1830 // ::= w # wchar_t 1831 // ::= b # bool 1832 // ::= c # char 1833 // ::= a # signed char 1834 // ::= h # unsigned char 1835 // ::= s # short 1836 // ::= t # unsigned short 1837 // ::= i # int 1838 // ::= j # unsigned int 1839 // ::= l # long 1840 // ::= m # unsigned long 1841 // ::= x # long long, __int64 1842 // ::= y # unsigned long long, __int64 1843 // ::= n # __int128 1844 // UNSUPPORTED: ::= o # unsigned __int128 1845 // ::= f # float 1846 // ::= d # double 1847 // ::= e # long double, __float80 1848 // UNSUPPORTED: ::= g # __float128 1849 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits) 1850 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits) 1851 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits) 1852 // ::= Dh # IEEE 754r half-precision floating point (16 bits) 1853 // ::= Di # char32_t 1854 // ::= Ds # char16_t 1855 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) 1856 // ::= u <source-name> # vendor extended type 1857 switch (T->getKind()) { 1858 case BuiltinType::Void: Out << 'v'; break; 1859 case BuiltinType::Bool: Out << 'b'; break; 1860 case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'c'; break; 1861 case BuiltinType::UChar: Out << 'h'; break; 1862 case BuiltinType::UShort: Out << 't'; break; 1863 case BuiltinType::UInt: Out << 'j'; break; 1864 case BuiltinType::ULong: Out << 'm'; break; 1865 case BuiltinType::ULongLong: Out << 'y'; break; 1866 case BuiltinType::UInt128: Out << 'o'; break; 1867 case BuiltinType::SChar: Out << 'a'; break; 1868 case BuiltinType::WChar_S: 1869 case BuiltinType::WChar_U: Out << 'w'; break; 1870 case BuiltinType::Char16: Out << "Ds"; break; 1871 case BuiltinType::Char32: Out << "Di"; break; 1872 case BuiltinType::Short: Out << 's'; break; 1873 case BuiltinType::Int: Out << 'i'; break; 1874 case BuiltinType::Long: Out << 'l'; break; 1875 case BuiltinType::LongLong: Out << 'x'; break; 1876 case BuiltinType::Int128: Out << 'n'; break; 1877 case BuiltinType::Half: Out << "Dh"; break; 1878 case BuiltinType::Float: Out << 'f'; break; 1879 case BuiltinType::Double: Out << 'd'; break; 1880 case BuiltinType::LongDouble: Out << 'e'; break; 1881 case BuiltinType::NullPtr: Out << "Dn"; break; 1882 1883#define BUILTIN_TYPE(Id, SingletonId) 1884#define PLACEHOLDER_TYPE(Id, SingletonId) \ 1885 case BuiltinType::Id: 1886#include "clang/AST/BuiltinTypes.def" 1887 case BuiltinType::Dependent: 1888 llvm_unreachable("mangling a placeholder type"); 1889 case BuiltinType::ObjCId: Out << "11objc_object"; break; 1890 case BuiltinType::ObjCClass: Out << "10objc_class"; break; 1891 case BuiltinType::ObjCSel: Out << "13objc_selector"; break; 1892 case BuiltinType::OCLImage1d: Out << "11ocl_image1d"; break; 1893 case BuiltinType::OCLImage1dArray: Out << "16ocl_image1darray"; break; 1894 case BuiltinType::OCLImage1dBuffer: Out << "17ocl_image1dbuffer"; break; 1895 case BuiltinType::OCLImage2d: Out << "11ocl_image2d"; break; 1896 case BuiltinType::OCLImage2dArray: Out << "16ocl_image2darray"; break; 1897 case BuiltinType::OCLImage3d: Out << "11ocl_image3d"; break; 1898 case BuiltinType::OCLSampler: Out << "11ocl_sampler"; break; 1899 case BuiltinType::OCLEvent: Out << "9ocl_event"; break; 1900 } 1901} 1902 1903// <type> ::= <function-type> 1904// <function-type> ::= [<CV-qualifiers>] F [Y] 1905// <bare-function-type> [<ref-qualifier>] E 1906// (Proposal to cxx-abi-dev, 2012-05-11) 1907void CXXNameMangler::mangleType(const FunctionProtoType *T) { 1908 // Mangle CV-qualifiers, if present. These are 'this' qualifiers, 1909 // e.g. "const" in "int (A::*)() const". 1910 mangleQualifiers(Qualifiers::fromCVRMask(T->getTypeQuals())); 1911 1912 Out << 'F'; 1913 1914 // FIXME: We don't have enough information in the AST to produce the 'Y' 1915 // encoding for extern "C" function types. 1916 mangleBareFunctionType(T, /*MangleReturnType=*/true); 1917 1918 // Mangle the ref-qualifier, if present. 1919 mangleRefQualifier(T->getRefQualifier()); 1920 1921 Out << 'E'; 1922} 1923void CXXNameMangler::mangleType(const FunctionNoProtoType *T) { 1924 llvm_unreachable("Can't mangle K&R function prototypes"); 1925} 1926void CXXNameMangler::mangleBareFunctionType(const FunctionType *T, 1927 bool MangleReturnType) { 1928 // We should never be mangling something without a prototype. 1929 const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 1930 1931 // Record that we're in a function type. See mangleFunctionParam 1932 // for details on what we're trying to achieve here. 1933 FunctionTypeDepthState saved = FunctionTypeDepth.push(); 1934 1935 // <bare-function-type> ::= <signature type>+ 1936 if (MangleReturnType) { 1937 FunctionTypeDepth.enterResultType(); 1938 mangleType(Proto->getResultType()); 1939 FunctionTypeDepth.leaveResultType(); 1940 } 1941 1942 if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) { 1943 // <builtin-type> ::= v # void 1944 Out << 'v'; 1945 1946 FunctionTypeDepth.pop(saved); 1947 return; 1948 } 1949 1950 for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(), 1951 ArgEnd = Proto->arg_type_end(); 1952 Arg != ArgEnd; ++Arg) 1953 mangleType(Context.getASTContext().getSignatureParameterType(*Arg)); 1954 1955 FunctionTypeDepth.pop(saved); 1956 1957 // <builtin-type> ::= z # ellipsis 1958 if (Proto->isVariadic()) 1959 Out << 'z'; 1960} 1961 1962// <type> ::= <class-enum-type> 1963// <class-enum-type> ::= <name> 1964void CXXNameMangler::mangleType(const UnresolvedUsingType *T) { 1965 mangleName(T->getDecl()); 1966} 1967 1968// <type> ::= <class-enum-type> 1969// <class-enum-type> ::= <name> 1970void CXXNameMangler::mangleType(const EnumType *T) { 1971 mangleType(static_cast<const TagType*>(T)); 1972} 1973void CXXNameMangler::mangleType(const RecordType *T) { 1974 mangleType(static_cast<const TagType*>(T)); 1975} 1976void CXXNameMangler::mangleType(const TagType *T) { 1977 mangleName(T->getDecl()); 1978} 1979 1980// <type> ::= <array-type> 1981// <array-type> ::= A <positive dimension number> _ <element type> 1982// ::= A [<dimension expression>] _ <element type> 1983void CXXNameMangler::mangleType(const ConstantArrayType *T) { 1984 Out << 'A' << T->getSize() << '_'; 1985 mangleType(T->getElementType()); 1986} 1987void CXXNameMangler::mangleType(const VariableArrayType *T) { 1988 Out << 'A'; 1989 // decayed vla types (size 0) will just be skipped. 1990 if (T->getSizeExpr()) 1991 mangleExpression(T->getSizeExpr()); 1992 Out << '_'; 1993 mangleType(T->getElementType()); 1994} 1995void CXXNameMangler::mangleType(const DependentSizedArrayType *T) { 1996 Out << 'A'; 1997 mangleExpression(T->getSizeExpr()); 1998 Out << '_'; 1999 mangleType(T->getElementType()); 2000} 2001void CXXNameMangler::mangleType(const IncompleteArrayType *T) { 2002 Out << "A_"; 2003 mangleType(T->getElementType()); 2004} 2005 2006// <type> ::= <pointer-to-member-type> 2007// <pointer-to-member-type> ::= M <class type> <member type> 2008void CXXNameMangler::mangleType(const MemberPointerType *T) { 2009 Out << 'M'; 2010 mangleType(QualType(T->getClass(), 0)); 2011 QualType PointeeType = T->getPointeeType(); 2012 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) { 2013 mangleType(FPT); 2014 2015 // Itanium C++ ABI 5.1.8: 2016 // 2017 // The type of a non-static member function is considered to be different, 2018 // for the purposes of substitution, from the type of a namespace-scope or 2019 // static member function whose type appears similar. The types of two 2020 // non-static member functions are considered to be different, for the 2021 // purposes of substitution, if the functions are members of different 2022 // classes. In other words, for the purposes of substitution, the class of 2023 // which the function is a member is considered part of the type of 2024 // function. 2025 2026 // Given that we already substitute member function pointers as a 2027 // whole, the net effect of this rule is just to unconditionally 2028 // suppress substitution on the function type in a member pointer. 2029 // We increment the SeqID here to emulate adding an entry to the 2030 // substitution table. 2031 ++SeqID; 2032 } else 2033 mangleType(PointeeType); 2034} 2035 2036// <type> ::= <template-param> 2037void CXXNameMangler::mangleType(const TemplateTypeParmType *T) { 2038 mangleTemplateParameter(T->getIndex()); 2039} 2040 2041// <type> ::= <template-param> 2042void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) { 2043 // FIXME: not clear how to mangle this! 2044 // template <class T...> class A { 2045 // template <class U...> void foo(T(*)(U) x...); 2046 // }; 2047 Out << "_SUBSTPACK_"; 2048} 2049 2050// <type> ::= P <type> # pointer-to 2051void CXXNameMangler::mangleType(const PointerType *T) { 2052 Out << 'P'; 2053 mangleType(T->getPointeeType()); 2054} 2055void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) { 2056 Out << 'P'; 2057 mangleType(T->getPointeeType()); 2058} 2059 2060// <type> ::= R <type> # reference-to 2061void CXXNameMangler::mangleType(const LValueReferenceType *T) { 2062 Out << 'R'; 2063 mangleType(T->getPointeeType()); 2064} 2065 2066// <type> ::= O <type> # rvalue reference-to (C++0x) 2067void CXXNameMangler::mangleType(const RValueReferenceType *T) { 2068 Out << 'O'; 2069 mangleType(T->getPointeeType()); 2070} 2071 2072// <type> ::= C <type> # complex pair (C 2000) 2073void CXXNameMangler::mangleType(const ComplexType *T) { 2074 Out << 'C'; 2075 mangleType(T->getElementType()); 2076} 2077 2078// ARM's ABI for Neon vector types specifies that they should be mangled as 2079// if they are structs (to match ARM's initial implementation). The 2080// vector type must be one of the special types predefined by ARM. 2081void CXXNameMangler::mangleNeonVectorType(const VectorType *T) { 2082 QualType EltType = T->getElementType(); 2083 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType"); 2084 const char *EltName = 0; 2085 if (T->getVectorKind() == VectorType::NeonPolyVector) { 2086 switch (cast<BuiltinType>(EltType)->getKind()) { 2087 case BuiltinType::SChar: EltName = "poly8_t"; break; 2088 case BuiltinType::Short: EltName = "poly16_t"; break; 2089 default: llvm_unreachable("unexpected Neon polynomial vector element type"); 2090 } 2091 } else { 2092 switch (cast<BuiltinType>(EltType)->getKind()) { 2093 case BuiltinType::SChar: EltName = "int8_t"; break; 2094 case BuiltinType::UChar: EltName = "uint8_t"; break; 2095 case BuiltinType::Short: EltName = "int16_t"; break; 2096 case BuiltinType::UShort: EltName = "uint16_t"; break; 2097 case BuiltinType::Int: EltName = "int32_t"; break; 2098 case BuiltinType::UInt: EltName = "uint32_t"; break; 2099 case BuiltinType::LongLong: EltName = "int64_t"; break; 2100 case BuiltinType::ULongLong: EltName = "uint64_t"; break; 2101 case BuiltinType::Float: EltName = "float32_t"; break; 2102 default: llvm_unreachable("unexpected Neon vector element type"); 2103 } 2104 } 2105 const char *BaseName = 0; 2106 unsigned BitSize = (T->getNumElements() * 2107 getASTContext().getTypeSize(EltType)); 2108 if (BitSize == 64) 2109 BaseName = "__simd64_"; 2110 else { 2111 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits"); 2112 BaseName = "__simd128_"; 2113 } 2114 Out << strlen(BaseName) + strlen(EltName); 2115 Out << BaseName << EltName; 2116} 2117 2118// GNU extension: vector types 2119// <type> ::= <vector-type> 2120// <vector-type> ::= Dv <positive dimension number> _ 2121// <extended element type> 2122// ::= Dv [<dimension expression>] _ <element type> 2123// <extended element type> ::= <element type> 2124// ::= p # AltiVec vector pixel 2125// ::= b # Altivec vector bool 2126void CXXNameMangler::mangleType(const VectorType *T) { 2127 if ((T->getVectorKind() == VectorType::NeonVector || 2128 T->getVectorKind() == VectorType::NeonPolyVector)) { 2129 mangleNeonVectorType(T); 2130 return; 2131 } 2132 Out << "Dv" << T->getNumElements() << '_'; 2133 if (T->getVectorKind() == VectorType::AltiVecPixel) 2134 Out << 'p'; 2135 else if (T->getVectorKind() == VectorType::AltiVecBool) 2136 Out << 'b'; 2137 else 2138 mangleType(T->getElementType()); 2139} 2140void CXXNameMangler::mangleType(const ExtVectorType *T) { 2141 mangleType(static_cast<const VectorType*>(T)); 2142} 2143void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) { 2144 Out << "Dv"; 2145 mangleExpression(T->getSizeExpr()); 2146 Out << '_'; 2147 mangleType(T->getElementType()); 2148} 2149 2150void CXXNameMangler::mangleType(const PackExpansionType *T) { 2151 // <type> ::= Dp <type> # pack expansion (C++0x) 2152 Out << "Dp"; 2153 mangleType(T->getPattern()); 2154} 2155 2156void CXXNameMangler::mangleType(const ObjCInterfaceType *T) { 2157 mangleSourceName(T->getDecl()->getIdentifier()); 2158} 2159 2160void CXXNameMangler::mangleType(const ObjCObjectType *T) { 2161 // We don't allow overloading by different protocol qualification, 2162 // so mangling them isn't necessary. 2163 mangleType(T->getBaseType()); 2164} 2165 2166void CXXNameMangler::mangleType(const BlockPointerType *T) { 2167 Out << "U13block_pointer"; 2168 mangleType(T->getPointeeType()); 2169} 2170 2171void CXXNameMangler::mangleType(const InjectedClassNameType *T) { 2172 // Mangle injected class name types as if the user had written the 2173 // specialization out fully. It may not actually be possible to see 2174 // this mangling, though. 2175 mangleType(T->getInjectedSpecializationType()); 2176} 2177 2178void CXXNameMangler::mangleType(const TemplateSpecializationType *T) { 2179 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) { 2180 mangleName(TD, T->getArgs(), T->getNumArgs()); 2181 } else { 2182 if (mangleSubstitution(QualType(T, 0))) 2183 return; 2184 2185 mangleTemplatePrefix(T->getTemplateName()); 2186 2187 // FIXME: GCC does not appear to mangle the template arguments when 2188 // the template in question is a dependent template name. Should we 2189 // emulate that badness? 2190 mangleTemplateArgs(T->getArgs(), T->getNumArgs()); 2191 addSubstitution(QualType(T, 0)); 2192 } 2193} 2194 2195void CXXNameMangler::mangleType(const DependentNameType *T) { 2196 // Typename types are always nested 2197 Out << 'N'; 2198 manglePrefix(T->getQualifier()); 2199 mangleSourceName(T->getIdentifier()); 2200 Out << 'E'; 2201} 2202 2203void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) { 2204 // Dependently-scoped template types are nested if they have a prefix. 2205 Out << 'N'; 2206 2207 // TODO: avoid making this TemplateName. 2208 TemplateName Prefix = 2209 getASTContext().getDependentTemplateName(T->getQualifier(), 2210 T->getIdentifier()); 2211 mangleTemplatePrefix(Prefix); 2212 2213 // FIXME: GCC does not appear to mangle the template arguments when 2214 // the template in question is a dependent template name. Should we 2215 // emulate that badness? 2216 mangleTemplateArgs(T->getArgs(), T->getNumArgs()); 2217 Out << 'E'; 2218} 2219 2220void CXXNameMangler::mangleType(const TypeOfType *T) { 2221 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2222 // "extension with parameters" mangling. 2223 Out << "u6typeof"; 2224} 2225 2226void CXXNameMangler::mangleType(const TypeOfExprType *T) { 2227 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2228 // "extension with parameters" mangling. 2229 Out << "u6typeof"; 2230} 2231 2232void CXXNameMangler::mangleType(const DecltypeType *T) { 2233 Expr *E = T->getUnderlyingExpr(); 2234 2235 // type ::= Dt <expression> E # decltype of an id-expression 2236 // # or class member access 2237 // ::= DT <expression> E # decltype of an expression 2238 2239 // This purports to be an exhaustive list of id-expressions and 2240 // class member accesses. Note that we do not ignore parentheses; 2241 // parentheses change the semantics of decltype for these 2242 // expressions (and cause the mangler to use the other form). 2243 if (isa<DeclRefExpr>(E) || 2244 isa<MemberExpr>(E) || 2245 isa<UnresolvedLookupExpr>(E) || 2246 isa<DependentScopeDeclRefExpr>(E) || 2247 isa<CXXDependentScopeMemberExpr>(E) || 2248 isa<UnresolvedMemberExpr>(E)) 2249 Out << "Dt"; 2250 else 2251 Out << "DT"; 2252 mangleExpression(E); 2253 Out << 'E'; 2254} 2255 2256void CXXNameMangler::mangleType(const UnaryTransformType *T) { 2257 // If this is dependent, we need to record that. If not, we simply 2258 // mangle it as the underlying type since they are equivalent. 2259 if (T->isDependentType()) { 2260 Out << 'U'; 2261 2262 switch (T->getUTTKind()) { 2263 case UnaryTransformType::EnumUnderlyingType: 2264 Out << "3eut"; 2265 break; 2266 } 2267 } 2268 2269 mangleType(T->getUnderlyingType()); 2270} 2271 2272void CXXNameMangler::mangleType(const AutoType *T) { 2273 QualType D = T->getDeducedType(); 2274 // <builtin-type> ::= Da # dependent auto 2275 if (D.isNull()) 2276 Out << "Da"; 2277 else 2278 mangleType(D); 2279} 2280 2281void CXXNameMangler::mangleType(const AtomicType *T) { 2282 // <type> ::= U <source-name> <type> # vendor extended type qualifier 2283 // (Until there's a standardized mangling...) 2284 Out << "U7_Atomic"; 2285 mangleType(T->getValueType()); 2286} 2287 2288void CXXNameMangler::mangleIntegerLiteral(QualType T, 2289 const llvm::APSInt &Value) { 2290 // <expr-primary> ::= L <type> <value number> E # integer literal 2291 Out << 'L'; 2292 2293 mangleType(T); 2294 if (T->isBooleanType()) { 2295 // Boolean values are encoded as 0/1. 2296 Out << (Value.getBoolValue() ? '1' : '0'); 2297 } else { 2298 mangleNumber(Value); 2299 } 2300 Out << 'E'; 2301 2302} 2303 2304/// Mangles a member expression. 2305void CXXNameMangler::mangleMemberExpr(const Expr *base, 2306 bool isArrow, 2307 NestedNameSpecifier *qualifier, 2308 NamedDecl *firstQualifierLookup, 2309 DeclarationName member, 2310 unsigned arity) { 2311 // <expression> ::= dt <expression> <unresolved-name> 2312 // ::= pt <expression> <unresolved-name> 2313 if (base) { 2314 if (base->isImplicitCXXThis()) { 2315 // Note: GCC mangles member expressions to the implicit 'this' as 2316 // *this., whereas we represent them as this->. The Itanium C++ ABI 2317 // does not specify anything here, so we follow GCC. 2318 Out << "dtdefpT"; 2319 } else { 2320 Out << (isArrow ? "pt" : "dt"); 2321 mangleExpression(base); 2322 } 2323 } 2324 mangleUnresolvedName(qualifier, firstQualifierLookup, member, arity); 2325} 2326 2327/// Look at the callee of the given call expression and determine if 2328/// it's a parenthesized id-expression which would have triggered ADL 2329/// otherwise. 2330static bool isParenthesizedADLCallee(const CallExpr *call) { 2331 const Expr *callee = call->getCallee(); 2332 const Expr *fn = callee->IgnoreParens(); 2333 2334 // Must be parenthesized. IgnoreParens() skips __extension__ nodes, 2335 // too, but for those to appear in the callee, it would have to be 2336 // parenthesized. 2337 if (callee == fn) return false; 2338 2339 // Must be an unresolved lookup. 2340 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn); 2341 if (!lookup) return false; 2342 2343 assert(!lookup->requiresADL()); 2344 2345 // Must be an unqualified lookup. 2346 if (lookup->getQualifier()) return false; 2347 2348 // Must not have found a class member. Note that if one is a class 2349 // member, they're all class members. 2350 if (lookup->getNumDecls() > 0 && 2351 (*lookup->decls_begin())->isCXXClassMember()) 2352 return false; 2353 2354 // Otherwise, ADL would have been triggered. 2355 return true; 2356} 2357 2358void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) { 2359 // <expression> ::= <unary operator-name> <expression> 2360 // ::= <binary operator-name> <expression> <expression> 2361 // ::= <trinary operator-name> <expression> <expression> <expression> 2362 // ::= cv <type> expression # conversion with one argument 2363 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments 2364 // ::= st <type> # sizeof (a type) 2365 // ::= at <type> # alignof (a type) 2366 // ::= <template-param> 2367 // ::= <function-param> 2368 // ::= sr <type> <unqualified-name> # dependent name 2369 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 2370 // ::= ds <expression> <expression> # expr.*expr 2371 // ::= sZ <template-param> # size of a parameter pack 2372 // ::= sZ <function-param> # size of a function parameter pack 2373 // ::= <expr-primary> 2374 // <expr-primary> ::= L <type> <value number> E # integer literal 2375 // ::= L <type <value float> E # floating literal 2376 // ::= L <mangled-name> E # external name 2377 // ::= fpT # 'this' expression 2378 QualType ImplicitlyConvertedToType; 2379 2380recurse: 2381 switch (E->getStmtClass()) { 2382 case Expr::NoStmtClass: 2383#define ABSTRACT_STMT(Type) 2384#define EXPR(Type, Base) 2385#define STMT(Type, Base) \ 2386 case Expr::Type##Class: 2387#include "clang/AST/StmtNodes.inc" 2388 // fallthrough 2389 2390 // These all can only appear in local or variable-initialization 2391 // contexts and so should never appear in a mangling. 2392 case Expr::AddrLabelExprClass: 2393 case Expr::DesignatedInitExprClass: 2394 case Expr::ImplicitValueInitExprClass: 2395 case Expr::ParenListExprClass: 2396 case Expr::LambdaExprClass: 2397 case Expr::MSPropertyRefExprClass: 2398 llvm_unreachable("unexpected statement kind"); 2399 2400 // FIXME: invent manglings for all these. 2401 case Expr::BlockExprClass: 2402 case Expr::CXXPseudoDestructorExprClass: 2403 case Expr::ChooseExprClass: 2404 case Expr::CompoundLiteralExprClass: 2405 case Expr::ExtVectorElementExprClass: 2406 case Expr::GenericSelectionExprClass: 2407 case Expr::ObjCEncodeExprClass: 2408 case Expr::ObjCIsaExprClass: 2409 case Expr::ObjCIvarRefExprClass: 2410 case Expr::ObjCMessageExprClass: 2411 case Expr::ObjCPropertyRefExprClass: 2412 case Expr::ObjCProtocolExprClass: 2413 case Expr::ObjCSelectorExprClass: 2414 case Expr::ObjCStringLiteralClass: 2415 case Expr::ObjCBoxedExprClass: 2416 case Expr::ObjCArrayLiteralClass: 2417 case Expr::ObjCDictionaryLiteralClass: 2418 case Expr::ObjCSubscriptRefExprClass: 2419 case Expr::ObjCIndirectCopyRestoreExprClass: 2420 case Expr::OffsetOfExprClass: 2421 case Expr::PredefinedExprClass: 2422 case Expr::ShuffleVectorExprClass: 2423 case Expr::StmtExprClass: 2424 case Expr::UnaryTypeTraitExprClass: 2425 case Expr::BinaryTypeTraitExprClass: 2426 case Expr::TypeTraitExprClass: 2427 case Expr::ArrayTypeTraitExprClass: 2428 case Expr::ExpressionTraitExprClass: 2429 case Expr::VAArgExprClass: 2430 case Expr::CXXUuidofExprClass: 2431 case Expr::CUDAKernelCallExprClass: 2432 case Expr::AsTypeExprClass: 2433 case Expr::PseudoObjectExprClass: 2434 case Expr::AtomicExprClass: 2435 { 2436 // As bad as this diagnostic is, it's better than crashing. 2437 DiagnosticsEngine &Diags = Context.getDiags(); 2438 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, 2439 "cannot yet mangle expression type %0"); 2440 Diags.Report(E->getExprLoc(), DiagID) 2441 << E->getStmtClassName() << E->getSourceRange(); 2442 break; 2443 } 2444 2445 // Even gcc-4.5 doesn't mangle this. 2446 case Expr::BinaryConditionalOperatorClass: { 2447 DiagnosticsEngine &Diags = Context.getDiags(); 2448 unsigned DiagID = 2449 Diags.getCustomDiagID(DiagnosticsEngine::Error, 2450 "?: operator with omitted middle operand cannot be mangled"); 2451 Diags.Report(E->getExprLoc(), DiagID) 2452 << E->getStmtClassName() << E->getSourceRange(); 2453 break; 2454 } 2455 2456 // These are used for internal purposes and cannot be meaningfully mangled. 2457 case Expr::OpaqueValueExprClass: 2458 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?"); 2459 2460 case Expr::InitListExprClass: { 2461 // Proposal by Jason Merrill, 2012-01-03 2462 Out << "il"; 2463 const InitListExpr *InitList = cast<InitListExpr>(E); 2464 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i) 2465 mangleExpression(InitList->getInit(i)); 2466 Out << "E"; 2467 break; 2468 } 2469 2470 case Expr::CXXDefaultArgExprClass: 2471 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity); 2472 break; 2473 2474 case Expr::SubstNonTypeTemplateParmExprClass: 2475 mangleExpression(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(), 2476 Arity); 2477 break; 2478 2479 case Expr::UserDefinedLiteralClass: 2480 // We follow g++'s approach of mangling a UDL as a call to the literal 2481 // operator. 2482 case Expr::CXXMemberCallExprClass: // fallthrough 2483 case Expr::CallExprClass: { 2484 const CallExpr *CE = cast<CallExpr>(E); 2485 2486 // <expression> ::= cp <simple-id> <expression>* E 2487 // We use this mangling only when the call would use ADL except 2488 // for being parenthesized. Per discussion with David 2489 // Vandervoorde, 2011.04.25. 2490 if (isParenthesizedADLCallee(CE)) { 2491 Out << "cp"; 2492 // The callee here is a parenthesized UnresolvedLookupExpr with 2493 // no qualifier and should always get mangled as a <simple-id> 2494 // anyway. 2495 2496 // <expression> ::= cl <expression>* E 2497 } else { 2498 Out << "cl"; 2499 } 2500 2501 mangleExpression(CE->getCallee(), CE->getNumArgs()); 2502 for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I) 2503 mangleExpression(CE->getArg(I)); 2504 Out << 'E'; 2505 break; 2506 } 2507 2508 case Expr::CXXNewExprClass: { 2509 const CXXNewExpr *New = cast<CXXNewExpr>(E); 2510 if (New->isGlobalNew()) Out << "gs"; 2511 Out << (New->isArray() ? "na" : "nw"); 2512 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(), 2513 E = New->placement_arg_end(); I != E; ++I) 2514 mangleExpression(*I); 2515 Out << '_'; 2516 mangleType(New->getAllocatedType()); 2517 if (New->hasInitializer()) { 2518 // Proposal by Jason Merrill, 2012-01-03 2519 if (New->getInitializationStyle() == CXXNewExpr::ListInit) 2520 Out << "il"; 2521 else 2522 Out << "pi"; 2523 const Expr *Init = New->getInitializer(); 2524 if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) { 2525 // Directly inline the initializers. 2526 for (CXXConstructExpr::const_arg_iterator I = CCE->arg_begin(), 2527 E = CCE->arg_end(); 2528 I != E; ++I) 2529 mangleExpression(*I); 2530 } else if (const ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) { 2531 for (unsigned i = 0, e = PLE->getNumExprs(); i != e; ++i) 2532 mangleExpression(PLE->getExpr(i)); 2533 } else if (New->getInitializationStyle() == CXXNewExpr::ListInit && 2534 isa<InitListExpr>(Init)) { 2535 // Only take InitListExprs apart for list-initialization. 2536 const InitListExpr *InitList = cast<InitListExpr>(Init); 2537 for (unsigned i = 0, e = InitList->getNumInits(); i != e; ++i) 2538 mangleExpression(InitList->getInit(i)); 2539 } else 2540 mangleExpression(Init); 2541 } 2542 Out << 'E'; 2543 break; 2544 } 2545 2546 case Expr::MemberExprClass: { 2547 const MemberExpr *ME = cast<MemberExpr>(E); 2548 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2549 ME->getQualifier(), 0, ME->getMemberDecl()->getDeclName(), 2550 Arity); 2551 break; 2552 } 2553 2554 case Expr::UnresolvedMemberExprClass: { 2555 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E); 2556 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2557 ME->getQualifier(), 0, ME->getMemberName(), 2558 Arity); 2559 if (ME->hasExplicitTemplateArgs()) 2560 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2561 break; 2562 } 2563 2564 case Expr::CXXDependentScopeMemberExprClass: { 2565 const CXXDependentScopeMemberExpr *ME 2566 = cast<CXXDependentScopeMemberExpr>(E); 2567 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2568 ME->getQualifier(), ME->getFirstQualifierFoundInScope(), 2569 ME->getMember(), Arity); 2570 if (ME->hasExplicitTemplateArgs()) 2571 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2572 break; 2573 } 2574 2575 case Expr::UnresolvedLookupExprClass: { 2576 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E); 2577 mangleUnresolvedName(ULE->getQualifier(), 0, ULE->getName(), Arity); 2578 2579 // All the <unresolved-name> productions end in a 2580 // base-unresolved-name, where <template-args> are just tacked 2581 // onto the end. 2582 if (ULE->hasExplicitTemplateArgs()) 2583 mangleTemplateArgs(ULE->getExplicitTemplateArgs()); 2584 break; 2585 } 2586 2587 case Expr::CXXUnresolvedConstructExprClass: { 2588 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E); 2589 unsigned N = CE->arg_size(); 2590 2591 Out << "cv"; 2592 mangleType(CE->getType()); 2593 if (N != 1) Out << '_'; 2594 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2595 if (N != 1) Out << 'E'; 2596 break; 2597 } 2598 2599 case Expr::CXXTemporaryObjectExprClass: 2600 case Expr::CXXConstructExprClass: { 2601 const CXXConstructExpr *CE = cast<CXXConstructExpr>(E); 2602 unsigned N = CE->getNumArgs(); 2603 2604 // Proposal by Jason Merrill, 2012-01-03 2605 if (CE->isListInitialization()) 2606 Out << "tl"; 2607 else 2608 Out << "cv"; 2609 mangleType(CE->getType()); 2610 if (N != 1) Out << '_'; 2611 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2612 if (N != 1) Out << 'E'; 2613 break; 2614 } 2615 2616 case Expr::CXXScalarValueInitExprClass: 2617 Out <<"cv"; 2618 mangleType(E->getType()); 2619 Out <<"_E"; 2620 break; 2621 2622 case Expr::CXXNoexceptExprClass: 2623 Out << "nx"; 2624 mangleExpression(cast<CXXNoexceptExpr>(E)->getOperand()); 2625 break; 2626 2627 case Expr::UnaryExprOrTypeTraitExprClass: { 2628 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E); 2629 2630 if (!SAE->isInstantiationDependent()) { 2631 // Itanium C++ ABI: 2632 // If the operand of a sizeof or alignof operator is not 2633 // instantiation-dependent it is encoded as an integer literal 2634 // reflecting the result of the operator. 2635 // 2636 // If the result of the operator is implicitly converted to a known 2637 // integer type, that type is used for the literal; otherwise, the type 2638 // of std::size_t or std::ptrdiff_t is used. 2639 QualType T = (ImplicitlyConvertedToType.isNull() || 2640 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType() 2641 : ImplicitlyConvertedToType; 2642 llvm::APSInt V = SAE->EvaluateKnownConstInt(Context.getASTContext()); 2643 mangleIntegerLiteral(T, V); 2644 break; 2645 } 2646 2647 switch(SAE->getKind()) { 2648 case UETT_SizeOf: 2649 Out << 's'; 2650 break; 2651 case UETT_AlignOf: 2652 Out << 'a'; 2653 break; 2654 case UETT_VecStep: 2655 DiagnosticsEngine &Diags = Context.getDiags(); 2656 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, 2657 "cannot yet mangle vec_step expression"); 2658 Diags.Report(DiagID); 2659 return; 2660 } 2661 if (SAE->isArgumentType()) { 2662 Out << 't'; 2663 mangleType(SAE->getArgumentType()); 2664 } else { 2665 Out << 'z'; 2666 mangleExpression(SAE->getArgumentExpr()); 2667 } 2668 break; 2669 } 2670 2671 case Expr::CXXThrowExprClass: { 2672 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E); 2673 2674 // Proposal from David Vandervoorde, 2010.06.30 2675 if (TE->getSubExpr()) { 2676 Out << "tw"; 2677 mangleExpression(TE->getSubExpr()); 2678 } else { 2679 Out << "tr"; 2680 } 2681 break; 2682 } 2683 2684 case Expr::CXXTypeidExprClass: { 2685 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E); 2686 2687 // Proposal from David Vandervoorde, 2010.06.30 2688 if (TIE->isTypeOperand()) { 2689 Out << "ti"; 2690 mangleType(TIE->getTypeOperand()); 2691 } else { 2692 Out << "te"; 2693 mangleExpression(TIE->getExprOperand()); 2694 } 2695 break; 2696 } 2697 2698 case Expr::CXXDeleteExprClass: { 2699 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E); 2700 2701 // Proposal from David Vandervoorde, 2010.06.30 2702 if (DE->isGlobalDelete()) Out << "gs"; 2703 Out << (DE->isArrayForm() ? "da" : "dl"); 2704 mangleExpression(DE->getArgument()); 2705 break; 2706 } 2707 2708 case Expr::UnaryOperatorClass: { 2709 const UnaryOperator *UO = cast<UnaryOperator>(E); 2710 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()), 2711 /*Arity=*/1); 2712 mangleExpression(UO->getSubExpr()); 2713 break; 2714 } 2715 2716 case Expr::ArraySubscriptExprClass: { 2717 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E); 2718 2719 // Array subscript is treated as a syntactically weird form of 2720 // binary operator. 2721 Out << "ix"; 2722 mangleExpression(AE->getLHS()); 2723 mangleExpression(AE->getRHS()); 2724 break; 2725 } 2726 2727 case Expr::CompoundAssignOperatorClass: // fallthrough 2728 case Expr::BinaryOperatorClass: { 2729 const BinaryOperator *BO = cast<BinaryOperator>(E); 2730 if (BO->getOpcode() == BO_PtrMemD) 2731 Out << "ds"; 2732 else 2733 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()), 2734 /*Arity=*/2); 2735 mangleExpression(BO->getLHS()); 2736 mangleExpression(BO->getRHS()); 2737 break; 2738 } 2739 2740 case Expr::ConditionalOperatorClass: { 2741 const ConditionalOperator *CO = cast<ConditionalOperator>(E); 2742 mangleOperatorName(OO_Conditional, /*Arity=*/3); 2743 mangleExpression(CO->getCond()); 2744 mangleExpression(CO->getLHS(), Arity); 2745 mangleExpression(CO->getRHS(), Arity); 2746 break; 2747 } 2748 2749 case Expr::ImplicitCastExprClass: { 2750 ImplicitlyConvertedToType = E->getType(); 2751 E = cast<ImplicitCastExpr>(E)->getSubExpr(); 2752 goto recurse; 2753 } 2754 2755 case Expr::ObjCBridgedCastExprClass: { 2756 // Mangle ownership casts as a vendor extended operator __bridge, 2757 // __bridge_transfer, or __bridge_retain. 2758 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName(); 2759 Out << "v1U" << Kind.size() << Kind; 2760 } 2761 // Fall through to mangle the cast itself. 2762 2763 case Expr::CStyleCastExprClass: 2764 case Expr::CXXStaticCastExprClass: 2765 case Expr::CXXDynamicCastExprClass: 2766 case Expr::CXXReinterpretCastExprClass: 2767 case Expr::CXXConstCastExprClass: 2768 case Expr::CXXFunctionalCastExprClass: { 2769 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E); 2770 Out << "cv"; 2771 mangleType(ECE->getType()); 2772 mangleExpression(ECE->getSubExpr()); 2773 break; 2774 } 2775 2776 case Expr::CXXOperatorCallExprClass: { 2777 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E); 2778 unsigned NumArgs = CE->getNumArgs(); 2779 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs); 2780 // Mangle the arguments. 2781 for (unsigned i = 0; i != NumArgs; ++i) 2782 mangleExpression(CE->getArg(i)); 2783 break; 2784 } 2785 2786 case Expr::ParenExprClass: 2787 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity); 2788 break; 2789 2790 case Expr::DeclRefExprClass: { 2791 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2792 2793 switch (D->getKind()) { 2794 default: 2795 // <expr-primary> ::= L <mangled-name> E # external name 2796 Out << 'L'; 2797 mangle(D, "_Z"); 2798 Out << 'E'; 2799 break; 2800 2801 case Decl::ParmVar: 2802 mangleFunctionParam(cast<ParmVarDecl>(D)); 2803 break; 2804 2805 case Decl::EnumConstant: { 2806 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D); 2807 mangleIntegerLiteral(ED->getType(), ED->getInitVal()); 2808 break; 2809 } 2810 2811 case Decl::NonTypeTemplateParm: { 2812 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D); 2813 mangleTemplateParameter(PD->getIndex()); 2814 break; 2815 } 2816 2817 } 2818 2819 break; 2820 } 2821 2822 case Expr::SubstNonTypeTemplateParmPackExprClass: 2823 // FIXME: not clear how to mangle this! 2824 // template <unsigned N...> class A { 2825 // template <class U...> void foo(U (&x)[N]...); 2826 // }; 2827 Out << "_SUBSTPACK_"; 2828 break; 2829 2830 case Expr::FunctionParmPackExprClass: { 2831 // FIXME: not clear how to mangle this! 2832 const FunctionParmPackExpr *FPPE = cast<FunctionParmPackExpr>(E); 2833 Out << "v110_SUBSTPACK"; 2834 mangleFunctionParam(FPPE->getParameterPack()); 2835 break; 2836 } 2837 2838 case Expr::DependentScopeDeclRefExprClass: { 2839 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E); 2840 mangleUnresolvedName(DRE->getQualifier(), 0, DRE->getDeclName(), Arity); 2841 2842 // All the <unresolved-name> productions end in a 2843 // base-unresolved-name, where <template-args> are just tacked 2844 // onto the end. 2845 if (DRE->hasExplicitTemplateArgs()) 2846 mangleTemplateArgs(DRE->getExplicitTemplateArgs()); 2847 break; 2848 } 2849 2850 case Expr::CXXBindTemporaryExprClass: 2851 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr()); 2852 break; 2853 2854 case Expr::ExprWithCleanupsClass: 2855 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity); 2856 break; 2857 2858 case Expr::FloatingLiteralClass: { 2859 const FloatingLiteral *FL = cast<FloatingLiteral>(E); 2860 Out << 'L'; 2861 mangleType(FL->getType()); 2862 mangleFloat(FL->getValue()); 2863 Out << 'E'; 2864 break; 2865 } 2866 2867 case Expr::CharacterLiteralClass: 2868 Out << 'L'; 2869 mangleType(E->getType()); 2870 Out << cast<CharacterLiteral>(E)->getValue(); 2871 Out << 'E'; 2872 break; 2873 2874 // FIXME. __objc_yes/__objc_no are mangled same as true/false 2875 case Expr::ObjCBoolLiteralExprClass: 2876 Out << "Lb"; 2877 Out << (cast<ObjCBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2878 Out << 'E'; 2879 break; 2880 2881 case Expr::CXXBoolLiteralExprClass: 2882 Out << "Lb"; 2883 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2884 Out << 'E'; 2885 break; 2886 2887 case Expr::IntegerLiteralClass: { 2888 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue()); 2889 if (E->getType()->isSignedIntegerType()) 2890 Value.setIsSigned(true); 2891 mangleIntegerLiteral(E->getType(), Value); 2892 break; 2893 } 2894 2895 case Expr::ImaginaryLiteralClass: { 2896 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E); 2897 // Mangle as if a complex literal. 2898 // Proposal from David Vandevoorde, 2010.06.30. 2899 Out << 'L'; 2900 mangleType(E->getType()); 2901 if (const FloatingLiteral *Imag = 2902 dyn_cast<FloatingLiteral>(IE->getSubExpr())) { 2903 // Mangle a floating-point zero of the appropriate type. 2904 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics())); 2905 Out << '_'; 2906 mangleFloat(Imag->getValue()); 2907 } else { 2908 Out << "0_"; 2909 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue()); 2910 if (IE->getSubExpr()->getType()->isSignedIntegerType()) 2911 Value.setIsSigned(true); 2912 mangleNumber(Value); 2913 } 2914 Out << 'E'; 2915 break; 2916 } 2917 2918 case Expr::StringLiteralClass: { 2919 // Revised proposal from David Vandervoorde, 2010.07.15. 2920 Out << 'L'; 2921 assert(isa<ConstantArrayType>(E->getType())); 2922 mangleType(E->getType()); 2923 Out << 'E'; 2924 break; 2925 } 2926 2927 case Expr::GNUNullExprClass: 2928 // FIXME: should this really be mangled the same as nullptr? 2929 // fallthrough 2930 2931 case Expr::CXXNullPtrLiteralExprClass: { 2932 // Proposal from David Vandervoorde, 2010.06.30, as 2933 // modified by ABI list discussion. 2934 Out << "LDnE"; 2935 break; 2936 } 2937 2938 case Expr::PackExpansionExprClass: 2939 Out << "sp"; 2940 mangleExpression(cast<PackExpansionExpr>(E)->getPattern()); 2941 break; 2942 2943 case Expr::SizeOfPackExprClass: { 2944 Out << "sZ"; 2945 const NamedDecl *Pack = cast<SizeOfPackExpr>(E)->getPack(); 2946 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack)) 2947 mangleTemplateParameter(TTP->getIndex()); 2948 else if (const NonTypeTemplateParmDecl *NTTP 2949 = dyn_cast<NonTypeTemplateParmDecl>(Pack)) 2950 mangleTemplateParameter(NTTP->getIndex()); 2951 else if (const TemplateTemplateParmDecl *TempTP 2952 = dyn_cast<TemplateTemplateParmDecl>(Pack)) 2953 mangleTemplateParameter(TempTP->getIndex()); 2954 else 2955 mangleFunctionParam(cast<ParmVarDecl>(Pack)); 2956 break; 2957 } 2958 2959 case Expr::MaterializeTemporaryExprClass: { 2960 mangleExpression(cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()); 2961 break; 2962 } 2963 2964 case Expr::CXXThisExprClass: 2965 Out << "fpT"; 2966 break; 2967 } 2968} 2969 2970/// Mangle an expression which refers to a parameter variable. 2971/// 2972/// <expression> ::= <function-param> 2973/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0 2974/// <function-param> ::= fp <top-level CV-qualifiers> 2975/// <parameter-2 non-negative number> _ # L == 0, I > 0 2976/// <function-param> ::= fL <L-1 non-negative number> 2977/// p <top-level CV-qualifiers> _ # L > 0, I == 0 2978/// <function-param> ::= fL <L-1 non-negative number> 2979/// p <top-level CV-qualifiers> 2980/// <I-1 non-negative number> _ # L > 0, I > 0 2981/// 2982/// L is the nesting depth of the parameter, defined as 1 if the 2983/// parameter comes from the innermost function prototype scope 2984/// enclosing the current context, 2 if from the next enclosing 2985/// function prototype scope, and so on, with one special case: if 2986/// we've processed the full parameter clause for the innermost 2987/// function type, then L is one less. This definition conveniently 2988/// makes it irrelevant whether a function's result type was written 2989/// trailing or leading, but is otherwise overly complicated; the 2990/// numbering was first designed without considering references to 2991/// parameter in locations other than return types, and then the 2992/// mangling had to be generalized without changing the existing 2993/// manglings. 2994/// 2995/// I is the zero-based index of the parameter within its parameter 2996/// declaration clause. Note that the original ABI document describes 2997/// this using 1-based ordinals. 2998void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) { 2999 unsigned parmDepth = parm->getFunctionScopeDepth(); 3000 unsigned parmIndex = parm->getFunctionScopeIndex(); 3001 3002 // Compute 'L'. 3003 // parmDepth does not include the declaring function prototype. 3004 // FunctionTypeDepth does account for that. 3005 assert(parmDepth < FunctionTypeDepth.getDepth()); 3006 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth; 3007 if (FunctionTypeDepth.isInResultType()) 3008 nestingDepth--; 3009 3010 if (nestingDepth == 0) { 3011 Out << "fp"; 3012 } else { 3013 Out << "fL" << (nestingDepth - 1) << 'p'; 3014 } 3015 3016 // Top-level qualifiers. We don't have to worry about arrays here, 3017 // because parameters declared as arrays should already have been 3018 // transformed to have pointer type. FIXME: apparently these don't 3019 // get mangled if used as an rvalue of a known non-class type? 3020 assert(!parm->getType()->isArrayType() 3021 && "parameter's type is still an array type?"); 3022 mangleQualifiers(parm->getType().getQualifiers()); 3023 3024 // Parameter index. 3025 if (parmIndex != 0) { 3026 Out << (parmIndex - 1); 3027 } 3028 Out << '_'; 3029} 3030 3031void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) { 3032 // <ctor-dtor-name> ::= C1 # complete object constructor 3033 // ::= C2 # base object constructor 3034 // ::= C3 # complete object allocating constructor 3035 // 3036 switch (T) { 3037 case Ctor_Complete: 3038 Out << "C1"; 3039 break; 3040 case Ctor_Base: 3041 Out << "C2"; 3042 break; 3043 case Ctor_CompleteAllocating: 3044 Out << "C3"; 3045 break; 3046 } 3047} 3048 3049void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) { 3050 // <ctor-dtor-name> ::= D0 # deleting destructor 3051 // ::= D1 # complete object destructor 3052 // ::= D2 # base object destructor 3053 // 3054 switch (T) { 3055 case Dtor_Deleting: 3056 Out << "D0"; 3057 break; 3058 case Dtor_Complete: 3059 Out << "D1"; 3060 break; 3061 case Dtor_Base: 3062 Out << "D2"; 3063 break; 3064 } 3065} 3066 3067void CXXNameMangler::mangleTemplateArgs( 3068 const ASTTemplateArgumentListInfo &TemplateArgs) { 3069 // <template-args> ::= I <template-arg>+ E 3070 Out << 'I'; 3071 for (unsigned i = 0, e = TemplateArgs.NumTemplateArgs; i != e; ++i) 3072 mangleTemplateArg(TemplateArgs.getTemplateArgs()[i].getArgument()); 3073 Out << 'E'; 3074} 3075 3076void CXXNameMangler::mangleTemplateArgs(const TemplateArgumentList &AL) { 3077 // <template-args> ::= I <template-arg>+ E 3078 Out << 'I'; 3079 for (unsigned i = 0, e = AL.size(); i != e; ++i) 3080 mangleTemplateArg(AL[i]); 3081 Out << 'E'; 3082} 3083 3084void CXXNameMangler::mangleTemplateArgs(const TemplateArgument *TemplateArgs, 3085 unsigned NumTemplateArgs) { 3086 // <template-args> ::= I <template-arg>+ E 3087 Out << 'I'; 3088 for (unsigned i = 0; i != NumTemplateArgs; ++i) 3089 mangleTemplateArg(TemplateArgs[i]); 3090 Out << 'E'; 3091} 3092 3093void CXXNameMangler::mangleTemplateArg(TemplateArgument A) { 3094 // <template-arg> ::= <type> # type or template 3095 // ::= X <expression> E # expression 3096 // ::= <expr-primary> # simple expressions 3097 // ::= J <template-arg>* E # argument pack 3098 // ::= sp <expression> # pack expansion of (C++0x) 3099 if (!A.isInstantiationDependent() || A.isDependent()) 3100 A = Context.getASTContext().getCanonicalTemplateArgument(A); 3101 3102 switch (A.getKind()) { 3103 case TemplateArgument::Null: 3104 llvm_unreachable("Cannot mangle NULL template argument"); 3105 3106 case TemplateArgument::Type: 3107 mangleType(A.getAsType()); 3108 break; 3109 case TemplateArgument::Template: 3110 // This is mangled as <type>. 3111 mangleType(A.getAsTemplate()); 3112 break; 3113 case TemplateArgument::TemplateExpansion: 3114 // <type> ::= Dp <type> # pack expansion (C++0x) 3115 Out << "Dp"; 3116 mangleType(A.getAsTemplateOrTemplatePattern()); 3117 break; 3118 case TemplateArgument::Expression: { 3119 // It's possible to end up with a DeclRefExpr here in certain 3120 // dependent cases, in which case we should mangle as a 3121 // declaration. 3122 const Expr *E = A.getAsExpr()->IgnoreParens(); 3123 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 3124 const ValueDecl *D = DRE->getDecl(); 3125 if (isa<VarDecl>(D) || isa<FunctionDecl>(D)) { 3126 Out << "L"; 3127 mangle(D, "_Z"); 3128 Out << 'E'; 3129 break; 3130 } 3131 } 3132 3133 Out << 'X'; 3134 mangleExpression(E); 3135 Out << 'E'; 3136 break; 3137 } 3138 case TemplateArgument::Integral: 3139 mangleIntegerLiteral(A.getIntegralType(), A.getAsIntegral()); 3140 break; 3141 case TemplateArgument::Declaration: { 3142 // <expr-primary> ::= L <mangled-name> E # external name 3143 // Clang produces AST's where pointer-to-member-function expressions 3144 // and pointer-to-function expressions are represented as a declaration not 3145 // an expression. We compensate for it here to produce the correct mangling. 3146 ValueDecl *D = A.getAsDecl(); 3147 bool compensateMangling = !A.isDeclForReferenceParam(); 3148 if (compensateMangling) { 3149 Out << 'X'; 3150 mangleOperatorName(OO_Amp, 1); 3151 } 3152 3153 Out << 'L'; 3154 // References to external entities use the mangled name; if the name would 3155 // not normally be manged then mangle it as unqualified. 3156 // 3157 // FIXME: The ABI specifies that external names here should have _Z, but 3158 // gcc leaves this off. 3159 if (compensateMangling) 3160 mangle(D, "_Z"); 3161 else 3162 mangle(D, "Z"); 3163 Out << 'E'; 3164 3165 if (compensateMangling) 3166 Out << 'E'; 3167 3168 break; 3169 } 3170 case TemplateArgument::NullPtr: { 3171 // <expr-primary> ::= L <type> 0 E 3172 Out << 'L'; 3173 mangleType(A.getNullPtrType()); 3174 Out << "0E"; 3175 break; 3176 } 3177 case TemplateArgument::Pack: { 3178 // Note: proposal by Mike Herrick on 12/20/10 3179 Out << 'J'; 3180 for (TemplateArgument::pack_iterator PA = A.pack_begin(), 3181 PAEnd = A.pack_end(); 3182 PA != PAEnd; ++PA) 3183 mangleTemplateArg(*PA); 3184 Out << 'E'; 3185 } 3186 } 3187} 3188 3189void CXXNameMangler::mangleTemplateParameter(unsigned Index) { 3190 // <template-param> ::= T_ # first template parameter 3191 // ::= T <parameter-2 non-negative number> _ 3192 if (Index == 0) 3193 Out << "T_"; 3194 else 3195 Out << 'T' << (Index - 1) << '_'; 3196} 3197 3198void CXXNameMangler::mangleExistingSubstitution(QualType type) { 3199 bool result = mangleSubstitution(type); 3200 assert(result && "no existing substitution for type"); 3201 (void) result; 3202} 3203 3204void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) { 3205 bool result = mangleSubstitution(tname); 3206 assert(result && "no existing substitution for template name"); 3207 (void) result; 3208} 3209 3210// <substitution> ::= S <seq-id> _ 3211// ::= S_ 3212bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) { 3213 // Try one of the standard substitutions first. 3214 if (mangleStandardSubstitution(ND)) 3215 return true; 3216 3217 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 3218 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND)); 3219} 3220 3221/// \brief Determine whether the given type has any qualifiers that are 3222/// relevant for substitutions. 3223static bool hasMangledSubstitutionQualifiers(QualType T) { 3224 Qualifiers Qs = T.getQualifiers(); 3225 return Qs.getCVRQualifiers() || Qs.hasAddressSpace(); 3226} 3227 3228bool CXXNameMangler::mangleSubstitution(QualType T) { 3229 if (!hasMangledSubstitutionQualifiers(T)) { 3230 if (const RecordType *RT = T->getAs<RecordType>()) 3231 return mangleSubstitution(RT->getDecl()); 3232 } 3233 3234 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 3235 3236 return mangleSubstitution(TypePtr); 3237} 3238 3239bool CXXNameMangler::mangleSubstitution(TemplateName Template) { 3240 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 3241 return mangleSubstitution(TD); 3242 3243 Template = Context.getASTContext().getCanonicalTemplateName(Template); 3244 return mangleSubstitution( 3245 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 3246} 3247 3248bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) { 3249 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr); 3250 if (I == Substitutions.end()) 3251 return false; 3252 3253 unsigned SeqID = I->second; 3254 if (SeqID == 0) 3255 Out << "S_"; 3256 else { 3257 SeqID--; 3258 3259 // <seq-id> is encoded in base-36, using digits and upper case letters. 3260 char Buffer[10]; 3261 char *BufferPtr = llvm::array_endof(Buffer); 3262 3263 if (SeqID == 0) *--BufferPtr = '0'; 3264 3265 while (SeqID) { 3266 assert(BufferPtr > Buffer && "Buffer overflow!"); 3267 3268 char c = static_cast<char>(SeqID % 36); 3269 3270 *--BufferPtr = (c < 10 ? '0' + c : 'A' + c - 10); 3271 SeqID /= 36; 3272 } 3273 3274 Out << 'S' 3275 << StringRef(BufferPtr, llvm::array_endof(Buffer)-BufferPtr) 3276 << '_'; 3277 } 3278 3279 return true; 3280} 3281 3282static bool isCharType(QualType T) { 3283 if (T.isNull()) 3284 return false; 3285 3286 return T->isSpecificBuiltinType(BuiltinType::Char_S) || 3287 T->isSpecificBuiltinType(BuiltinType::Char_U); 3288} 3289 3290/// isCharSpecialization - Returns whether a given type is a template 3291/// specialization of a given name with a single argument of type char. 3292static bool isCharSpecialization(QualType T, const char *Name) { 3293 if (T.isNull()) 3294 return false; 3295 3296 const RecordType *RT = T->getAs<RecordType>(); 3297 if (!RT) 3298 return false; 3299 3300 const ClassTemplateSpecializationDecl *SD = 3301 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); 3302 if (!SD) 3303 return false; 3304 3305 if (!isStdNamespace(getEffectiveDeclContext(SD))) 3306 return false; 3307 3308 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3309 if (TemplateArgs.size() != 1) 3310 return false; 3311 3312 if (!isCharType(TemplateArgs[0].getAsType())) 3313 return false; 3314 3315 return SD->getIdentifier()->getName() == Name; 3316} 3317 3318template <std::size_t StrLen> 3319static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD, 3320 const char (&Str)[StrLen]) { 3321 if (!SD->getIdentifier()->isStr(Str)) 3322 return false; 3323 3324 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3325 if (TemplateArgs.size() != 2) 3326 return false; 3327 3328 if (!isCharType(TemplateArgs[0].getAsType())) 3329 return false; 3330 3331 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3332 return false; 3333 3334 return true; 3335} 3336 3337bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) { 3338 // <substitution> ::= St # ::std:: 3339 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 3340 if (isStd(NS)) { 3341 Out << "St"; 3342 return true; 3343 } 3344 } 3345 3346 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) { 3347 if (!isStdNamespace(getEffectiveDeclContext(TD))) 3348 return false; 3349 3350 // <substitution> ::= Sa # ::std::allocator 3351 if (TD->getIdentifier()->isStr("allocator")) { 3352 Out << "Sa"; 3353 return true; 3354 } 3355 3356 // <<substitution> ::= Sb # ::std::basic_string 3357 if (TD->getIdentifier()->isStr("basic_string")) { 3358 Out << "Sb"; 3359 return true; 3360 } 3361 } 3362 3363 if (const ClassTemplateSpecializationDecl *SD = 3364 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 3365 if (!isStdNamespace(getEffectiveDeclContext(SD))) 3366 return false; 3367 3368 // <substitution> ::= Ss # ::std::basic_string<char, 3369 // ::std::char_traits<char>, 3370 // ::std::allocator<char> > 3371 if (SD->getIdentifier()->isStr("basic_string")) { 3372 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3373 3374 if (TemplateArgs.size() != 3) 3375 return false; 3376 3377 if (!isCharType(TemplateArgs[0].getAsType())) 3378 return false; 3379 3380 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3381 return false; 3382 3383 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator")) 3384 return false; 3385 3386 Out << "Ss"; 3387 return true; 3388 } 3389 3390 // <substitution> ::= Si # ::std::basic_istream<char, 3391 // ::std::char_traits<char> > 3392 if (isStreamCharSpecialization(SD, "basic_istream")) { 3393 Out << "Si"; 3394 return true; 3395 } 3396 3397 // <substitution> ::= So # ::std::basic_ostream<char, 3398 // ::std::char_traits<char> > 3399 if (isStreamCharSpecialization(SD, "basic_ostream")) { 3400 Out << "So"; 3401 return true; 3402 } 3403 3404 // <substitution> ::= Sd # ::std::basic_iostream<char, 3405 // ::std::char_traits<char> > 3406 if (isStreamCharSpecialization(SD, "basic_iostream")) { 3407 Out << "Sd"; 3408 return true; 3409 } 3410 } 3411 return false; 3412} 3413 3414void CXXNameMangler::addSubstitution(QualType T) { 3415 if (!hasMangledSubstitutionQualifiers(T)) { 3416 if (const RecordType *RT = T->getAs<RecordType>()) { 3417 addSubstitution(RT->getDecl()); 3418 return; 3419 } 3420 } 3421 3422 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 3423 addSubstitution(TypePtr); 3424} 3425 3426void CXXNameMangler::addSubstitution(TemplateName Template) { 3427 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 3428 return addSubstitution(TD); 3429 3430 Template = Context.getASTContext().getCanonicalTemplateName(Template); 3431 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 3432} 3433 3434void CXXNameMangler::addSubstitution(uintptr_t Ptr) { 3435 assert(!Substitutions.count(Ptr) && "Substitution already exists!"); 3436 Substitutions[Ptr] = SeqID++; 3437} 3438 3439// 3440 3441/// \brief Mangles the name of the declaration D and emits that name to the 3442/// given output stream. 3443/// 3444/// If the declaration D requires a mangled name, this routine will emit that 3445/// mangled name to \p os and return true. Otherwise, \p os will be unchanged 3446/// and this routine will return false. In this case, the caller should just 3447/// emit the identifier of the declaration (\c D->getIdentifier()) as its 3448/// name. 3449void ItaniumMangleContext::mangleName(const NamedDecl *D, 3450 raw_ostream &Out) { 3451 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) && 3452 "Invalid mangleName() call, argument is not a variable or function!"); 3453 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) && 3454 "Invalid mangleName() call on 'structor decl!"); 3455 3456 PrettyStackTraceDecl CrashInfo(D, SourceLocation(), 3457 getASTContext().getSourceManager(), 3458 "Mangling declaration"); 3459 3460 CXXNameMangler Mangler(*this, Out, D); 3461 return Mangler.mangle(D); 3462} 3463 3464void ItaniumMangleContext::mangleCXXCtor(const CXXConstructorDecl *D, 3465 CXXCtorType Type, 3466 raw_ostream &Out) { 3467 CXXNameMangler Mangler(*this, Out, D, Type); 3468 Mangler.mangle(D); 3469} 3470 3471void ItaniumMangleContext::mangleCXXDtor(const CXXDestructorDecl *D, 3472 CXXDtorType Type, 3473 raw_ostream &Out) { 3474 CXXNameMangler Mangler(*this, Out, D, Type); 3475 Mangler.mangle(D); 3476} 3477 3478void ItaniumMangleContext::mangleThunk(const CXXMethodDecl *MD, 3479 const ThunkInfo &Thunk, 3480 raw_ostream &Out) { 3481 // <special-name> ::= T <call-offset> <base encoding> 3482 // # base is the nominal target function of thunk 3483 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding> 3484 // # base is the nominal target function of thunk 3485 // # first call-offset is 'this' adjustment 3486 // # second call-offset is result adjustment 3487 3488 assert(!isa<CXXDestructorDecl>(MD) && 3489 "Use mangleCXXDtor for destructor decls!"); 3490 CXXNameMangler Mangler(*this, Out); 3491 Mangler.getStream() << "_ZT"; 3492 if (!Thunk.Return.isEmpty()) 3493 Mangler.getStream() << 'c'; 3494 3495 // Mangle the 'this' pointer adjustment. 3496 Mangler.mangleCallOffset(Thunk.This.NonVirtual, Thunk.This.VCallOffsetOffset); 3497 3498 // Mangle the return pointer adjustment if there is one. 3499 if (!Thunk.Return.isEmpty()) 3500 Mangler.mangleCallOffset(Thunk.Return.NonVirtual, 3501 Thunk.Return.VBaseOffsetOffset); 3502 3503 Mangler.mangleFunctionEncoding(MD); 3504} 3505 3506void 3507ItaniumMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD, 3508 CXXDtorType Type, 3509 const ThisAdjustment &ThisAdjustment, 3510 raw_ostream &Out) { 3511 // <special-name> ::= T <call-offset> <base encoding> 3512 // # base is the nominal target function of thunk 3513 CXXNameMangler Mangler(*this, Out, DD, Type); 3514 Mangler.getStream() << "_ZT"; 3515 3516 // Mangle the 'this' pointer adjustment. 3517 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual, 3518 ThisAdjustment.VCallOffsetOffset); 3519 3520 Mangler.mangleFunctionEncoding(DD); 3521} 3522 3523/// mangleGuardVariable - Returns the mangled name for a guard variable 3524/// for the passed in VarDecl. 3525void ItaniumMangleContext::mangleItaniumGuardVariable(const VarDecl *D, 3526 raw_ostream &Out) { 3527 // <special-name> ::= GV <object name> # Guard variable for one-time 3528 // # initialization 3529 CXXNameMangler Mangler(*this, Out); 3530 Mangler.getStream() << "_ZGV"; 3531 Mangler.mangleName(D); 3532} 3533 3534void ItaniumMangleContext::mangleReferenceTemporary(const VarDecl *D, 3535 raw_ostream &Out) { 3536 // We match the GCC mangling here. 3537 // <special-name> ::= GR <object name> 3538 CXXNameMangler Mangler(*this, Out); 3539 Mangler.getStream() << "_ZGR"; 3540 Mangler.mangleName(D); 3541} 3542 3543void ItaniumMangleContext::mangleCXXVTable(const CXXRecordDecl *RD, 3544 raw_ostream &Out) { 3545 // <special-name> ::= TV <type> # virtual table 3546 CXXNameMangler Mangler(*this, Out); 3547 Mangler.getStream() << "_ZTV"; 3548 Mangler.mangleNameOrStandardSubstitution(RD); 3549} 3550 3551void ItaniumMangleContext::mangleCXXVTT(const CXXRecordDecl *RD, 3552 raw_ostream &Out) { 3553 // <special-name> ::= TT <type> # VTT structure 3554 CXXNameMangler Mangler(*this, Out); 3555 Mangler.getStream() << "_ZTT"; 3556 Mangler.mangleNameOrStandardSubstitution(RD); 3557} 3558 3559void ItaniumMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD, 3560 int64_t Offset, 3561 const CXXRecordDecl *Type, 3562 raw_ostream &Out) { 3563 // <special-name> ::= TC <type> <offset number> _ <base type> 3564 CXXNameMangler Mangler(*this, Out); 3565 Mangler.getStream() << "_ZTC"; 3566 Mangler.mangleNameOrStandardSubstitution(RD); 3567 Mangler.getStream() << Offset; 3568 Mangler.getStream() << '_'; 3569 Mangler.mangleNameOrStandardSubstitution(Type); 3570} 3571 3572void ItaniumMangleContext::mangleCXXRTTI(QualType Ty, 3573 raw_ostream &Out) { 3574 // <special-name> ::= TI <type> # typeinfo structure 3575 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers"); 3576 CXXNameMangler Mangler(*this, Out); 3577 Mangler.getStream() << "_ZTI"; 3578 Mangler.mangleType(Ty); 3579} 3580 3581void ItaniumMangleContext::mangleCXXRTTIName(QualType Ty, 3582 raw_ostream &Out) { 3583 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string) 3584 CXXNameMangler Mangler(*this, Out); 3585 Mangler.getStream() << "_ZTS"; 3586 Mangler.mangleType(Ty); 3587} 3588 3589MangleContext *clang::createItaniumMangleContext(ASTContext &Context, 3590 DiagnosticsEngine &Diags) { 3591 return new ItaniumMangleContext(Context, Diags); 3592} 3593