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llvm-project/clang/lib/AST/MicrosoftMangle.cpp
Ben Langmuir 3b4c30b7e7 CodeGen for CapturedStmts 
EmitCapturedStmt creates a captured struct containing all of the captured
variables, and then emits a call to the outlined function.  This is similar in
principle to EmitBlockLiteral.

GenerateCapturedFunction actually produces the outlined function.  It is based
on GenerateBlockFunction, but is much simpler.  The function type is determined
by the parameters that are in the CapturedDecl.

Some changes have been added to this patch that were reviewed as part of the
serialization patch and moving the parameters to the captured decl.

Differential Revision: http://llvm-reviews.chandlerc.com/D640

llvm-svn: 181536
2013-05-09 19:17:11 +00:00

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68 KiB
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//===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This provides C++ name mangling targeting the Microsoft Visual C++ ABI.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Mangle.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ExprCXX.h"
#include "clang/Basic/ABI.h"
#include "clang/Basic/DiagnosticOptions.h"
#include <map>
using namespace clang;
namespace {
static const FunctionDecl *getStructor(const FunctionDecl *fn) {
if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate())
return ftd->getTemplatedDecl();
return fn;
}
/// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
/// Microsoft Visual C++ ABI.
class MicrosoftCXXNameMangler {
MangleContext &Context;
raw_ostream &Out;
/// The "structor" is the top-level declaration being mangled, if
/// that's not a template specialization; otherwise it's the pattern
/// for that specialization.
const NamedDecl *Structor;
unsigned StructorType;
// FIXME: audit the performance of BackRefMap as it might do way too many
// copying of strings.
typedef std::map<std::string, unsigned> BackRefMap;
BackRefMap NameBackReferences;
bool UseNameBackReferences;
typedef llvm::DenseMap<void*, unsigned> ArgBackRefMap;
ArgBackRefMap TypeBackReferences;
ASTContext &getASTContext() const { return Context.getASTContext(); }
public:
enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
MicrosoftCXXNameMangler(MangleContext &C, raw_ostream &Out_)
: Context(C), Out(Out_),
Structor(0), StructorType(-1),
UseNameBackReferences(true) { }
MicrosoftCXXNameMangler(MangleContext &C, raw_ostream &Out_,
const CXXDestructorDecl *D, CXXDtorType Type)
: Context(C), Out(Out_),
Structor(getStructor(D)), StructorType(Type),
UseNameBackReferences(true) { }
raw_ostream &getStream() const { return Out; }
void mangle(const NamedDecl *D, StringRef Prefix = "\01?");
void mangleName(const NamedDecl *ND);
void mangleFunctionEncoding(const FunctionDecl *FD);
void mangleVariableEncoding(const VarDecl *VD);
void mangleNumber(int64_t Number);
void mangleNumber(const llvm::APSInt &Value);
void mangleType(QualType T, SourceRange Range,
QualifierMangleMode QMM = QMM_Mangle);
private:
void disableBackReferences() { UseNameBackReferences = false; }
void mangleUnqualifiedName(const NamedDecl *ND) {
mangleUnqualifiedName(ND, ND->getDeclName());
}
void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
void mangleSourceName(const IdentifierInfo *II);
void manglePostfix(const DeclContext *DC, bool NoFunction=false);
void mangleOperatorName(OverloadedOperatorKind OO, SourceLocation Loc);
void mangleCXXDtorType(CXXDtorType T);
void mangleQualifiers(Qualifiers Quals, bool IsMember);
void manglePointerQualifiers(Qualifiers Quals);
void mangleUnscopedTemplateName(const TemplateDecl *ND);
void mangleTemplateInstantiationName(const TemplateDecl *TD,
const TemplateArgumentList &TemplateArgs);
void mangleObjCMethodName(const ObjCMethodDecl *MD);
void mangleLocalName(const FunctionDecl *FD);
void mangleArgumentType(QualType T, SourceRange Range);
// Declare manglers for every type class.
#define ABSTRACT_TYPE(CLASS, PARENT)
#define NON_CANONICAL_TYPE(CLASS, PARENT)
#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
SourceRange Range);
#include "clang/AST/TypeNodes.def"
#undef ABSTRACT_TYPE
#undef NON_CANONICAL_TYPE
#undef TYPE
void mangleType(const TagType*);
void mangleFunctionType(const FunctionType *T, const FunctionDecl *D,
bool IsStructor, bool IsInstMethod);
void mangleDecayedArrayType(const ArrayType *T, bool IsGlobal);
void mangleArrayType(const ArrayType *T, Qualifiers Quals);
void mangleFunctionClass(const FunctionDecl *FD);
void mangleCallingConvention(const FunctionType *T, bool IsInstMethod = false);
void mangleIntegerLiteral(const llvm::APSInt &Number, bool IsBoolean);
void mangleExpression(const Expr *E);
void mangleThrowSpecification(const FunctionProtoType *T);
void mangleTemplateArgs(const TemplateDecl *TD,
const TemplateArgumentList &TemplateArgs);
};
/// MicrosoftMangleContext - Overrides the default MangleContext for the
/// Microsoft Visual C++ ABI.
class MicrosoftMangleContext : public MangleContext {
public:
MicrosoftMangleContext(ASTContext &Context,
DiagnosticsEngine &Diags) : MangleContext(Context, Diags) { }
virtual bool shouldMangleDeclName(const NamedDecl *D);
virtual void mangleName(const NamedDecl *D, raw_ostream &Out);
virtual void mangleThunk(const CXXMethodDecl *MD,
const ThunkInfo &Thunk,
raw_ostream &);
virtual void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
const ThisAdjustment &ThisAdjustment,
raw_ostream &);
virtual void mangleCXXVTable(const CXXRecordDecl *RD,
raw_ostream &);
virtual void mangleCXXVTT(const CXXRecordDecl *RD,
raw_ostream &);
virtual void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
const CXXRecordDecl *Type,
raw_ostream &);
virtual void mangleCXXRTTI(QualType T, raw_ostream &);
virtual void mangleCXXRTTIName(QualType T, raw_ostream &);
virtual void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
raw_ostream &);
virtual void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
raw_ostream &);
virtual void mangleReferenceTemporary(const clang::VarDecl *,
raw_ostream &);
};
}
static bool isInCLinkageSpecification(const Decl *D) {
D = D->getCanonicalDecl();
for (const DeclContext *DC = D->getDeclContext();
!DC->isTranslationUnit(); DC = DC->getParent()) {
if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC))
return Linkage->getLanguage() == LinkageSpecDecl::lang_c;
}
return false;
}
bool MicrosoftMangleContext::shouldMangleDeclName(const NamedDecl *D) {
// In C, functions with no attributes never need to be mangled. Fastpath them.
if (!getASTContext().getLangOpts().CPlusPlus && !D->hasAttrs())
return false;
// Any decl can be declared with __asm("foo") on it, and this takes precedence
// over all other naming in the .o file.
if (D->hasAttr<AsmLabelAttr>())
return true;
// Clang's "overloadable" attribute extension to C/C++ implies name mangling
// (always) as does passing a C++ member function and a function
// whose name is not a simple identifier.
const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
if (FD && (FD->hasAttr<OverloadableAttr>() || isa<CXXMethodDecl>(FD) ||
!FD->getDeclName().isIdentifier()))
return true;
// Otherwise, no mangling is done outside C++ mode.
if (!getASTContext().getLangOpts().CPlusPlus)
return false;
// Variables at global scope with internal linkage are not mangled.
if (!FD) {
const DeclContext *DC = D->getDeclContext();
if (DC->isTranslationUnit() && D->getLinkage() == InternalLinkage)
return false;
}
// C functions and "main" are not mangled.
if ((FD && FD->isMain()) || isInCLinkageSpecification(D))
return false;
return true;
}
void MicrosoftCXXNameMangler::mangle(const NamedDecl *D,
StringRef Prefix) {
// MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
// Therefore it's really important that we don't decorate the
// name with leading underscores or leading/trailing at signs. So, by
// default, we emit an asm marker at the start so we get the name right.
// Callers can override this with a custom prefix.
// Any decl can be declared with __asm("foo") on it, and this takes precedence
// over all other naming in the .o file.
if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) {
// If we have an asm name, then we use it as the mangling.
Out << '\01' << ALA->getLabel();
return;
}
// <mangled-name> ::= ? <name> <type-encoding>
Out << Prefix;
mangleName(D);
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
mangleFunctionEncoding(FD);
else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
mangleVariableEncoding(VD);
else {
// TODO: Fields? Can MSVC even mangle them?
// Issue a diagnostic for now.
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this declaration yet");
Diags.Report(D->getLocation(), DiagID)
<< D->getSourceRange();
}
}
void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
// <type-encoding> ::= <function-class> <function-type>
// Don't mangle in the type if this isn't a decl we should typically mangle.
if (!Context.shouldMangleDeclName(FD))
return;
// We should never ever see a FunctionNoProtoType at this point.
// We don't even know how to mangle their types anyway :).
const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
bool InStructor = false, InInstMethod = false;
const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
if (MD) {
if (MD->isInstance())
InInstMethod = true;
if (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD))
InStructor = true;
}
// First, the function class.
mangleFunctionClass(FD);
mangleFunctionType(FT, FD, InStructor, InInstMethod);
}
void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
// <type-encoding> ::= <storage-class> <variable-type>
// <storage-class> ::= 0 # private static member
// ::= 1 # protected static member
// ::= 2 # public static member
// ::= 3 # global
// ::= 4 # static local
// The first character in the encoding (after the name) is the storage class.
if (VD->isStaticDataMember()) {
// If it's a static member, it also encodes the access level.
switch (VD->getAccess()) {
default:
case AS_private: Out << '0'; break;
case AS_protected: Out << '1'; break;
case AS_public: Out << '2'; break;
}
}
else if (!VD->isStaticLocal())
Out << '3';
else
Out << '4';
// Now mangle the type.
// <variable-type> ::= <type> <cvr-qualifiers>
// ::= <type> <pointee-cvr-qualifiers> # pointers, references
// Pointers and references are odd. The type of 'int * const foo;' gets
// mangled as 'QAHA' instead of 'PAHB', for example.
TypeLoc TL = VD->getTypeSourceInfo()->getTypeLoc();
QualType Ty = TL.getType();
if (Ty->isPointerType() || Ty->isReferenceType()) {
mangleType(Ty, TL.getSourceRange(), QMM_Drop);
mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
} else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
// Global arrays are funny, too.
mangleDecayedArrayType(AT, true);
if (AT->getElementType()->isArrayType())
Out << 'A';
else
mangleQualifiers(Ty.getQualifiers(), false);
} else {
mangleType(Ty, TL.getSourceRange(), QMM_Drop);
mangleQualifiers(Ty.getLocalQualifiers(), false);
}
}
void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
// <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
const DeclContext *DC = ND->getDeclContext();
// Always start with the unqualified name.
mangleUnqualifiedName(ND);
// If this is an extern variable declared locally, the relevant DeclContext
// is that of the containing namespace, or the translation unit.
if (isa<FunctionDecl>(DC) && ND->hasLinkage())
while (!DC->isNamespace() && !DC->isTranslationUnit())
DC = DC->getParent();
manglePostfix(DC);
// Terminate the whole name with an '@'.
Out << '@';
}
void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
llvm::APSInt APSNumber(/*BitWidth=*/64, /*isUnsigned=*/false);
APSNumber = Number;
mangleNumber(APSNumber);
}
void MicrosoftCXXNameMangler::mangleNumber(const llvm::APSInt &Value) {
// <number> ::= [?] <decimal digit> # 1 <= Number <= 10
// ::= [?] <hex digit>+ @ # 0 or > 9; A = 0, B = 1, etc...
// ::= [?] @ # 0 (alternate mangling, not emitted by VC)
if (Value.isSigned() && Value.isNegative()) {
Out << '?';
mangleNumber(llvm::APSInt(Value.abs()));
return;
}
llvm::APSInt Temp(Value);
// There's a special shorter mangling for 0, but Microsoft
// chose not to use it. Instead, 0 gets mangled as "A@". Oh well...
if (Value.uge(1) && Value.ule(10)) {
--Temp;
Temp.print(Out, false);
} else {
// We have to build up the encoding in reverse order, so it will come
// out right when we write it out.
char Encoding[64];
char *EndPtr = Encoding+sizeof(Encoding);
char *CurPtr = EndPtr;
llvm::APSInt NibbleMask(Value.getBitWidth(), Value.isUnsigned());
NibbleMask = 0xf;
do {
*--CurPtr = 'A' + Temp.And(NibbleMask).getLimitedValue(0xf);
Temp = Temp.lshr(4);
} while (Temp != 0);
Out.write(CurPtr, EndPtr-CurPtr);
Out << '@';
}
}
static const TemplateDecl *
isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
// Check if we have a function template.
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)){
if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
TemplateArgs = FD->getTemplateSpecializationArgs();
return TD;
}
}
// Check if we have a class template.
if (const ClassTemplateSpecializationDecl *Spec =
dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
TemplateArgs = &Spec->getTemplateArgs();
return Spec->getSpecializedTemplate();
}
return 0;
}
void
MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
DeclarationName Name) {
// <unqualified-name> ::= <operator-name>
// ::= <ctor-dtor-name>
// ::= <source-name>
// ::= <template-name>
// Check if we have a template.
const TemplateArgumentList *TemplateArgs = 0;
if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
// We have a template.
// Here comes the tricky thing: if we need to mangle something like
// void foo(A::X<Y>, B::X<Y>),
// the X<Y> part is aliased. However, if you need to mangle
// void foo(A::X<A::Y>, A::X<B::Y>),
// the A::X<> part is not aliased.
// That said, from the mangler's perspective we have a structure like this:
// namespace[s] -> type[ -> template-parameters]
// but from the Clang perspective we have
// type [ -> template-parameters]
// \-> namespace[s]
// What we do is we create a new mangler, mangle the same type (without
// a namespace suffix) using the extra mangler with back references
// disabled (to avoid infinite recursion) and then use the mangled type
// name as a key to check the mangling of different types for aliasing.
std::string BackReferenceKey;
BackRefMap::iterator Found;
if (UseNameBackReferences) {
llvm::raw_string_ostream Stream(BackReferenceKey);
MicrosoftCXXNameMangler Extra(Context, Stream);
Extra.disableBackReferences();
Extra.mangleUnqualifiedName(ND, Name);
Stream.flush();
Found = NameBackReferences.find(BackReferenceKey);
}
if (!UseNameBackReferences || Found == NameBackReferences.end()) {
mangleTemplateInstantiationName(TD, *TemplateArgs);
if (UseNameBackReferences && NameBackReferences.size() < 10) {
size_t Size = NameBackReferences.size();
NameBackReferences[BackReferenceKey] = Size;
}
} else {
Out << Found->second;
}
return;
}
switch (Name.getNameKind()) {
case DeclarationName::Identifier: {
if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
mangleSourceName(II);
break;
}
// Otherwise, an anonymous entity. We must have a declaration.
assert(ND && "mangling empty name without declaration");
if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
if (NS->isAnonymousNamespace()) {
Out << "?A@";
break;
}
}
// We must have an anonymous struct.
const TagDecl *TD = cast<TagDecl>(ND);
if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
assert(TD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!");
assert(D->getDeclName().getAsIdentifierInfo() &&
"Typedef was not named!");
mangleSourceName(D->getDeclName().getAsIdentifierInfo());
break;
}
// When VC encounters an anonymous type with no tag and no typedef,
// it literally emits '<unnamed-tag>'.
Out << "<unnamed-tag>";
break;
}
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
llvm_unreachable("Can't mangle Objective-C selector names here!");
case DeclarationName::CXXConstructorName:
if (ND == Structor) {
assert(StructorType == Ctor_Complete &&
"Should never be asked to mangle a ctor other than complete");
}
Out << "?0";
break;
case DeclarationName::CXXDestructorName:
if (ND == Structor)
// If the named decl is the C++ destructor we're mangling,
// use the type we were given.
mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
else
// Otherwise, use the complete destructor name. This is relevant if a
// class with a destructor is declared within a destructor.
mangleCXXDtorType(Dtor_Complete);
break;
case DeclarationName::CXXConversionFunctionName:
// <operator-name> ::= ?B # (cast)
// The target type is encoded as the return type.
Out << "?B";
break;
case DeclarationName::CXXOperatorName:
mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
break;
case DeclarationName::CXXLiteralOperatorName: {
// FIXME: Was this added in VS2010? Does MS even know how to mangle this?
DiagnosticsEngine Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this literal operator yet");
Diags.Report(ND->getLocation(), DiagID);
break;
}
case DeclarationName::CXXUsingDirective:
llvm_unreachable("Can't mangle a using directive name!");
}
}
void MicrosoftCXXNameMangler::manglePostfix(const DeclContext *DC,
bool NoFunction) {
// <postfix> ::= <unqualified-name> [<postfix>]
// ::= <substitution> [<postfix>]
if (!DC) return;
while (isa<LinkageSpecDecl>(DC))
DC = DC->getParent();
if (DC->isTranslationUnit())
return;
if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
Context.mangleBlock(BD, Out);
Out << '@';
return manglePostfix(DC->getParent(), NoFunction);
} else if (isa<CapturedDecl>(DC)) {
// Skip CapturedDecl context.
manglePostfix(DC->getParent(), NoFunction);
return;
}
if (NoFunction && (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)))
return;
else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC))
mangleObjCMethodName(Method);
else if (const FunctionDecl *Func = dyn_cast<FunctionDecl>(DC))
mangleLocalName(Func);
else {
mangleUnqualifiedName(cast<NamedDecl>(DC));
manglePostfix(DC->getParent(), NoFunction);
}
}
void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
switch (T) {
case Dtor_Deleting:
Out << "?_G";
return;
case Dtor_Base:
// FIXME: We should be asked to mangle base dtors.
// However, fixing this would require larger changes to the CodeGenModule.
// Please put llvm_unreachable here when CGM is changed.
// For now, just mangle a base dtor the same way as a complete dtor...
case Dtor_Complete:
Out << "?1";
return;
}
llvm_unreachable("Unsupported dtor type?");
}
void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
SourceLocation Loc) {
switch (OO) {
// ?0 # constructor
// ?1 # destructor
// <operator-name> ::= ?2 # new
case OO_New: Out << "?2"; break;
// <operator-name> ::= ?3 # delete
case OO_Delete: Out << "?3"; break;
// <operator-name> ::= ?4 # =
case OO_Equal: Out << "?4"; break;
// <operator-name> ::= ?5 # >>
case OO_GreaterGreater: Out << "?5"; break;
// <operator-name> ::= ?6 # <<
case OO_LessLess: Out << "?6"; break;
// <operator-name> ::= ?7 # !
case OO_Exclaim: Out << "?7"; break;
// <operator-name> ::= ?8 # ==
case OO_EqualEqual: Out << "?8"; break;
// <operator-name> ::= ?9 # !=
case OO_ExclaimEqual: Out << "?9"; break;
// <operator-name> ::= ?A # []
case OO_Subscript: Out << "?A"; break;
// ?B # conversion
// <operator-name> ::= ?C # ->
case OO_Arrow: Out << "?C"; break;
// <operator-name> ::= ?D # *
case OO_Star: Out << "?D"; break;
// <operator-name> ::= ?E # ++
case OO_PlusPlus: Out << "?E"; break;
// <operator-name> ::= ?F # --
case OO_MinusMinus: Out << "?F"; break;
// <operator-name> ::= ?G # -
case OO_Minus: Out << "?G"; break;
// <operator-name> ::= ?H # +
case OO_Plus: Out << "?H"; break;
// <operator-name> ::= ?I # &
case OO_Amp: Out << "?I"; break;
// <operator-name> ::= ?J # ->*
case OO_ArrowStar: Out << "?J"; break;
// <operator-name> ::= ?K # /
case OO_Slash: Out << "?K"; break;
// <operator-name> ::= ?L # %
case OO_Percent: Out << "?L"; break;
// <operator-name> ::= ?M # <
case OO_Less: Out << "?M"; break;
// <operator-name> ::= ?N # <=
case OO_LessEqual: Out << "?N"; break;
// <operator-name> ::= ?O # >
case OO_Greater: Out << "?O"; break;
// <operator-name> ::= ?P # >=
case OO_GreaterEqual: Out << "?P"; break;
// <operator-name> ::= ?Q # ,
case OO_Comma: Out << "?Q"; break;
// <operator-name> ::= ?R # ()
case OO_Call: Out << "?R"; break;
// <operator-name> ::= ?S # ~
case OO_Tilde: Out << "?S"; break;
// <operator-name> ::= ?T # ^
case OO_Caret: Out << "?T"; break;
// <operator-name> ::= ?U # |
case OO_Pipe: Out << "?U"; break;
// <operator-name> ::= ?V # &&
case OO_AmpAmp: Out << "?V"; break;
// <operator-name> ::= ?W # ||
case OO_PipePipe: Out << "?W"; break;
// <operator-name> ::= ?X # *=
case OO_StarEqual: Out << "?X"; break;
// <operator-name> ::= ?Y # +=
case OO_PlusEqual: Out << "?Y"; break;
// <operator-name> ::= ?Z # -=
case OO_MinusEqual: Out << "?Z"; break;
// <operator-name> ::= ?_0 # /=
case OO_SlashEqual: Out << "?_0"; break;
// <operator-name> ::= ?_1 # %=
case OO_PercentEqual: Out << "?_1"; break;
// <operator-name> ::= ?_2 # >>=
case OO_GreaterGreaterEqual: Out << "?_2"; break;
// <operator-name> ::= ?_3 # <<=
case OO_LessLessEqual: Out << "?_3"; break;
// <operator-name> ::= ?_4 # &=
case OO_AmpEqual: Out << "?_4"; break;
// <operator-name> ::= ?_5 # |=
case OO_PipeEqual: Out << "?_5"; break;
// <operator-name> ::= ?_6 # ^=
case OO_CaretEqual: Out << "?_6"; break;
// ?_7 # vftable
// ?_8 # vbtable
// ?_9 # vcall
// ?_A # typeof
// ?_B # local static guard
// ?_C # string
// ?_D # vbase destructor
// ?_E # vector deleting destructor
// ?_F # default constructor closure
// ?_G # scalar deleting destructor
// ?_H # vector constructor iterator
// ?_I # vector destructor iterator
// ?_J # vector vbase constructor iterator
// ?_K # virtual displacement map
// ?_L # eh vector constructor iterator
// ?_M # eh vector destructor iterator
// ?_N # eh vector vbase constructor iterator
// ?_O # copy constructor closure
// ?_P<name> # udt returning <name>
// ?_Q # <unknown>
// ?_R0 # RTTI Type Descriptor
// ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
// ?_R2 # RTTI Base Class Array
// ?_R3 # RTTI Class Hierarchy Descriptor
// ?_R4 # RTTI Complete Object Locator
// ?_S # local vftable
// ?_T # local vftable constructor closure
// <operator-name> ::= ?_U # new[]
case OO_Array_New: Out << "?_U"; break;
// <operator-name> ::= ?_V # delete[]
case OO_Array_Delete: Out << "?_V"; break;
case OO_Conditional: {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this conditional operator yet");
Diags.Report(Loc, DiagID);
break;
}
case OO_None:
case NUM_OVERLOADED_OPERATORS:
llvm_unreachable("Not an overloaded operator");
}
}
void MicrosoftCXXNameMangler::mangleSourceName(const IdentifierInfo *II) {
// <source name> ::= <identifier> @
std::string key = II->getNameStart();
BackRefMap::iterator Found;
if (UseNameBackReferences)
Found = NameBackReferences.find(key);
if (!UseNameBackReferences || Found == NameBackReferences.end()) {
Out << II->getName() << '@';
if (UseNameBackReferences && NameBackReferences.size() < 10) {
size_t Size = NameBackReferences.size();
NameBackReferences[key] = Size;
}
} else {
Out << Found->second;
}
}
void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
Context.mangleObjCMethodName(MD, Out);
}
// Find out how many function decls live above this one and return an integer
// suitable for use as the number in a numbered anonymous scope.
// TODO: Memoize.
static unsigned getLocalNestingLevel(const FunctionDecl *FD) {
const DeclContext *DC = FD->getParent();
int level = 1;
while (DC && !DC->isTranslationUnit()) {
if (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)) level++;
DC = DC->getParent();
}
return 2*level;
}
void MicrosoftCXXNameMangler::mangleLocalName(const FunctionDecl *FD) {
// <nested-name> ::= <numbered-anonymous-scope> ? <mangled-name>
// <numbered-anonymous-scope> ::= ? <number>
// Even though the name is rendered in reverse order (e.g.
// A::B::C is rendered as C@B@A), VC numbers the scopes from outermost to
// innermost. So a method bar in class C local to function foo gets mangled
// as something like:
// ?bar@C@?1??foo@@YAXXZ@QAEXXZ
// This is more apparent when you have a type nested inside a method of a
// type nested inside a function. A method baz in class D local to method
// bar of class C local to function foo gets mangled as:
// ?baz@D@?3??bar@C@?1??foo@@YAXXZ@QAEXXZ@QAEXXZ
// This scheme is general enough to support GCC-style nested
// functions. You could have a method baz of class C inside a function bar
// inside a function foo, like so:
// ?baz@C@?3??bar@?1??foo@@YAXXZ@YAXXZ@QAEXXZ
int NestLevel = getLocalNestingLevel(FD);
Out << '?';
mangleNumber(NestLevel);
Out << '?';
mangle(FD, "?");
}
void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
const TemplateDecl *TD,
const TemplateArgumentList &TemplateArgs) {
// <template-name> ::= <unscoped-template-name> <template-args>
// ::= <substitution>
// Always start with the unqualified name.
// Templates have their own context for back references.
ArgBackRefMap OuterArgsContext;
BackRefMap OuterTemplateContext;
NameBackReferences.swap(OuterTemplateContext);
TypeBackReferences.swap(OuterArgsContext);
mangleUnscopedTemplateName(TD);
mangleTemplateArgs(TD, TemplateArgs);
// Restore the previous back reference contexts.
NameBackReferences.swap(OuterTemplateContext);
TypeBackReferences.swap(OuterArgsContext);
}
void
MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
// <unscoped-template-name> ::= ?$ <unqualified-name>
Out << "?$";
mangleUnqualifiedName(TD);
}
void
MicrosoftCXXNameMangler::mangleIntegerLiteral(const llvm::APSInt &Value,
bool IsBoolean) {
// <integer-literal> ::= $0 <number>
Out << "$0";
// Make sure booleans are encoded as 0/1.
if (IsBoolean && Value.getBoolValue())
mangleNumber(1);
else
mangleNumber(Value);
}
void
MicrosoftCXXNameMangler::mangleExpression(const Expr *E) {
// See if this is a constant expression.
llvm::APSInt Value;
if (E->isIntegerConstantExpr(Value, Context.getASTContext())) {
mangleIntegerLiteral(Value, E->getType()->isBooleanType());
return;
}
// As bad as this diagnostic is, it's better than crashing.
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot yet mangle expression type %0");
Diags.Report(E->getExprLoc(), DiagID)
<< E->getStmtClassName() << E->getSourceRange();
}
void
MicrosoftCXXNameMangler::mangleTemplateArgs(const TemplateDecl *TD,
const TemplateArgumentList &TemplateArgs) {
// <template-args> ::= {<type> | <integer-literal>}+ @
unsigned NumTemplateArgs = TemplateArgs.size();
for (unsigned i = 0; i < NumTemplateArgs; ++i) {
const TemplateArgument &TA = TemplateArgs[i];
switch (TA.getKind()) {
case TemplateArgument::Null:
llvm_unreachable("Can't mangle null template arguments!");
case TemplateArgument::Type: {
QualType T = TA.getAsType();
mangleType(T, SourceRange(), QMM_Escape);
break;
}
case TemplateArgument::Declaration:
mangle(cast<NamedDecl>(TA.getAsDecl()), "$1?");
break;
case TemplateArgument::Integral:
mangleIntegerLiteral(TA.getAsIntegral(),
TA.getIntegralType()->isBooleanType());
break;
case TemplateArgument::Expression:
mangleExpression(TA.getAsExpr());
break;
case TemplateArgument::Template:
case TemplateArgument::TemplateExpansion:
case TemplateArgument::NullPtr:
case TemplateArgument::Pack: {
// Issue a diagnostic.
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle template argument %0 of kind %select{ERROR|ERROR|"
"pointer/reference|nullptr|integral|template|template pack expansion|"
"ERROR|parameter pack}1 yet");
Diags.Report(TD->getLocation(), DiagID)
<< i + 1
<< TA.getKind()
<< TD->getSourceRange();
}
}
}
Out << '@';
}
void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
bool IsMember) {
// <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
// 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
// 'I' means __restrict (32/64-bit).
// Note that the MSVC __restrict keyword isn't the same as the C99 restrict
// keyword!
// <base-cvr-qualifiers> ::= A # near
// ::= B # near const
// ::= C # near volatile
// ::= D # near const volatile
// ::= E # far (16-bit)
// ::= F # far const (16-bit)
// ::= G # far volatile (16-bit)
// ::= H # far const volatile (16-bit)
// ::= I # huge (16-bit)
// ::= J # huge const (16-bit)
// ::= K # huge volatile (16-bit)
// ::= L # huge const volatile (16-bit)
// ::= M <basis> # based
// ::= N <basis> # based const
// ::= O <basis> # based volatile
// ::= P <basis> # based const volatile
// ::= Q # near member
// ::= R # near const member
// ::= S # near volatile member
// ::= T # near const volatile member
// ::= U # far member (16-bit)
// ::= V # far const member (16-bit)
// ::= W # far volatile member (16-bit)
// ::= X # far const volatile member (16-bit)
// ::= Y # huge member (16-bit)
// ::= Z # huge const member (16-bit)
// ::= 0 # huge volatile member (16-bit)
// ::= 1 # huge const volatile member (16-bit)
// ::= 2 <basis> # based member
// ::= 3 <basis> # based const member
// ::= 4 <basis> # based volatile member
// ::= 5 <basis> # based const volatile member
// ::= 6 # near function (pointers only)
// ::= 7 # far function (pointers only)
// ::= 8 # near method (pointers only)
// ::= 9 # far method (pointers only)
// ::= _A <basis> # based function (pointers only)
// ::= _B <basis> # based function (far?) (pointers only)
// ::= _C <basis> # based method (pointers only)
// ::= _D <basis> # based method (far?) (pointers only)
// ::= _E # block (Clang)
// <basis> ::= 0 # __based(void)
// ::= 1 # __based(segment)?
// ::= 2 <name> # __based(name)
// ::= 3 # ?
// ::= 4 # ?
// ::= 5 # not really based
bool HasConst = Quals.hasConst(),
HasVolatile = Quals.hasVolatile();
if (!IsMember) {
if (HasConst && HasVolatile) {
Out << 'D';
} else if (HasVolatile) {
Out << 'C';
} else if (HasConst) {
Out << 'B';
} else {
Out << 'A';
}
} else {
if (HasConst && HasVolatile) {
Out << 'T';
} else if (HasVolatile) {
Out << 'S';
} else if (HasConst) {
Out << 'R';
} else {
Out << 'Q';
}
}
// FIXME: For now, just drop all extension qualifiers on the floor.
}
void MicrosoftCXXNameMangler::manglePointerQualifiers(Qualifiers Quals) {
// <pointer-cvr-qualifiers> ::= P # no qualifiers
// ::= Q # const
// ::= R # volatile
// ::= S # const volatile
bool HasConst = Quals.hasConst(),
HasVolatile = Quals.hasVolatile();
if (HasConst && HasVolatile) {
Out << 'S';
} else if (HasVolatile) {
Out << 'R';
} else if (HasConst) {
Out << 'Q';
} else {
Out << 'P';
}
}
void MicrosoftCXXNameMangler::mangleArgumentType(QualType T,
SourceRange Range) {
void *TypePtr = getASTContext().getCanonicalType(T).getAsOpaquePtr();
ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
if (Found == TypeBackReferences.end()) {
size_t OutSizeBefore = Out.GetNumBytesInBuffer();
if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
mangleDecayedArrayType(AT, false);
} else if (const FunctionType *FT = T->getAs<FunctionType>()) {
Out << "P6";
mangleFunctionType(FT, 0, false, false);
} else {
mangleType(T, Range, QMM_Drop);
}
// See if it's worth creating a back reference.
// Only types longer than 1 character are considered
// and only 10 back references slots are available:
bool LongerThanOneChar = (Out.GetNumBytesInBuffer() - OutSizeBefore > 1);
if (LongerThanOneChar && TypeBackReferences.size() < 10) {
size_t Size = TypeBackReferences.size();
TypeBackReferences[TypePtr] = Size;
}
} else {
Out << Found->second;
}
}
void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
QualifierMangleMode QMM) {
// Only operate on the canonical type!
T = getASTContext().getCanonicalType(T);
Qualifiers Quals = T.getLocalQualifiers();
if (const ArrayType *AT = dyn_cast<ArrayType>(T)) {
if (QMM == QMM_Mangle)
Out << 'A';
else if (QMM == QMM_Escape || QMM == QMM_Result)
Out << "$$B";
mangleArrayType(AT, Quals);
return;
}
bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
T->isBlockPointerType();
switch (QMM) {
case QMM_Drop:
break;
case QMM_Mangle:
if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
Out << '6';
mangleFunctionType(FT, 0, false, false);
return;
}
mangleQualifiers(Quals, false);
break;
case QMM_Escape:
if (!IsPointer && Quals) {
Out << "$$C";
mangleQualifiers(Quals, false);
}
break;
case QMM_Result:
if ((!IsPointer && Quals) || isa<TagType>(T)) {
Out << '?';
mangleQualifiers(Quals, false);
}
break;
}
// We have to mangle these now, while we still have enough information.
if (IsPointer)
manglePointerQualifiers(Quals);
const Type *ty = T.getTypePtr();
switch (ty->getTypeClass()) {
#define ABSTRACT_TYPE(CLASS, PARENT)
#define NON_CANONICAL_TYPE(CLASS, PARENT) \
case Type::CLASS: \
llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
return;
#define TYPE(CLASS, PARENT) \
case Type::CLASS: \
mangleType(cast<CLASS##Type>(ty), Range); \
break;
#include "clang/AST/TypeNodes.def"
#undef ABSTRACT_TYPE
#undef NON_CANONICAL_TYPE
#undef TYPE
}
}
void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T,
SourceRange Range) {
// <type> ::= <builtin-type>
// <builtin-type> ::= X # void
// ::= C # signed char
// ::= D # char
// ::= E # unsigned char
// ::= F # short
// ::= G # unsigned short (or wchar_t if it's not a builtin)
// ::= H # int
// ::= I # unsigned int
// ::= J # long
// ::= K # unsigned long
// L # <none>
// ::= M # float
// ::= N # double
// ::= O # long double (__float80 is mangled differently)
// ::= _J # long long, __int64
// ::= _K # unsigned long long, __int64
// ::= _L # __int128
// ::= _M # unsigned __int128
// ::= _N # bool
// _O # <array in parameter>
// ::= _T # __float80 (Intel)
// ::= _W # wchar_t
// ::= _Z # __float80 (Digital Mars)
switch (T->getKind()) {
case BuiltinType::Void: Out << 'X'; break;
case BuiltinType::SChar: Out << 'C'; break;
case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'D'; break;
case BuiltinType::UChar: Out << 'E'; break;
case BuiltinType::Short: Out << 'F'; break;
case BuiltinType::UShort: Out << 'G'; break;
case BuiltinType::Int: Out << 'H'; break;
case BuiltinType::UInt: Out << 'I'; break;
case BuiltinType::Long: Out << 'J'; break;
case BuiltinType::ULong: Out << 'K'; break;
case BuiltinType::Float: Out << 'M'; break;
case BuiltinType::Double: Out << 'N'; break;
// TODO: Determine size and mangle accordingly
case BuiltinType::LongDouble: Out << 'O'; break;
case BuiltinType::LongLong: Out << "_J"; break;
case BuiltinType::ULongLong: Out << "_K"; break;
case BuiltinType::Int128: Out << "_L"; break;
case BuiltinType::UInt128: Out << "_M"; break;
case BuiltinType::Bool: Out << "_N"; break;
case BuiltinType::WChar_S:
case BuiltinType::WChar_U: Out << "_W"; break;
#define BUILTIN_TYPE(Id, SingletonId)
#define PLACEHOLDER_TYPE(Id, SingletonId) \
case BuiltinType::Id:
#include "clang/AST/BuiltinTypes.def"
case BuiltinType::Dependent:
llvm_unreachable("placeholder types shouldn't get to name mangling");
case BuiltinType::ObjCId: Out << "PAUobjc_object@@"; break;
case BuiltinType::ObjCClass: Out << "PAUobjc_class@@"; break;
case BuiltinType::ObjCSel: Out << "PAUobjc_selector@@"; break;
case BuiltinType::OCLImage1d: Out << "PAUocl_image1d@@"; break;
case BuiltinType::OCLImage1dArray: Out << "PAUocl_image1darray@@"; break;
case BuiltinType::OCLImage1dBuffer: Out << "PAUocl_image1dbuffer@@"; break;
case BuiltinType::OCLImage2d: Out << "PAUocl_image2d@@"; break;
case BuiltinType::OCLImage2dArray: Out << "PAUocl_image2darray@@"; break;
case BuiltinType::OCLImage3d: Out << "PAUocl_image3d@@"; break;
case BuiltinType::OCLSampler: Out << "PAUocl_sampler@@"; break;
case BuiltinType::OCLEvent: Out << "PAUocl_event@@"; break;
case BuiltinType::NullPtr: Out << "$$T"; break;
case BuiltinType::Char16:
case BuiltinType::Char32:
case BuiltinType::Half: {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this built-in %0 type yet");
Diags.Report(Range.getBegin(), DiagID)
<< T->getName(Context.getASTContext().getPrintingPolicy())
<< Range;
break;
}
}
}
// <type> ::= <function-type>
void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T,
SourceRange) {
// Structors only appear in decls, so at this point we know it's not a
// structor type.
// FIXME: This may not be lambda-friendly.
Out << "$$A6";
mangleFunctionType(T, NULL, false, false);
}
void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
SourceRange) {
llvm_unreachable("Can't mangle K&R function prototypes");
}
void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
const FunctionDecl *D,
bool IsStructor,
bool IsInstMethod) {
// <function-type> ::= <this-cvr-qualifiers> <calling-convention>
// <return-type> <argument-list> <throw-spec>
const FunctionProtoType *Proto = cast<FunctionProtoType>(T);
// If this is a C++ instance method, mangle the CVR qualifiers for the
// this pointer.
if (IsInstMethod)
mangleQualifiers(Qualifiers::fromCVRMask(Proto->getTypeQuals()), false);
mangleCallingConvention(T, IsInstMethod);
// <return-type> ::= <type>
// ::= @ # structors (they have no declared return type)
if (IsStructor) {
if (isa<CXXDestructorDecl>(D) && D == Structor &&
StructorType == Dtor_Deleting) {
// The scalar deleting destructor takes an extra int argument.
// However, the FunctionType generated has 0 arguments.
// FIXME: This is a temporary hack.
// Maybe should fix the FunctionType creation instead?
Out << "PAXI@Z";
return;
}
Out << '@';
} else {
mangleType(Proto->getResultType(), SourceRange(), QMM_Result);
}
// <argument-list> ::= X # void
// ::= <type>+ @
// ::= <type>* Z # varargs
if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) {
Out << 'X';
} else {
if (D) {
// If we got a decl, use the type-as-written to make sure arrays
// get mangled right. Note that we can't rely on the TSI
// existing if (for example) the parameter was synthesized.
for (FunctionDecl::param_const_iterator Parm = D->param_begin(),
ParmEnd = D->param_end(); Parm != ParmEnd; ++Parm) {
TypeSourceInfo *TSI = (*Parm)->getTypeSourceInfo();
QualType Type = TSI ? TSI->getType() : (*Parm)->getType();
mangleArgumentType(Type, (*Parm)->getSourceRange());
}
} else {
// Happens for function pointer type arguments for example.
for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(),
ArgEnd = Proto->arg_type_end();
Arg != ArgEnd; ++Arg)
mangleArgumentType(*Arg, SourceRange());
}
// <builtin-type> ::= Z # ellipsis
if (Proto->isVariadic())
Out << 'Z';
else
Out << '@';
}
mangleThrowSpecification(Proto);
}
void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
// <function-class> ::= A # private: near
// ::= B # private: far
// ::= C # private: static near
// ::= D # private: static far
// ::= E # private: virtual near
// ::= F # private: virtual far
// ::= G # private: thunk near
// ::= H # private: thunk far
// ::= I # protected: near
// ::= J # protected: far
// ::= K # protected: static near
// ::= L # protected: static far
// ::= M # protected: virtual near
// ::= N # protected: virtual far
// ::= O # protected: thunk near
// ::= P # protected: thunk far
// ::= Q # public: near
// ::= R # public: far
// ::= S # public: static near
// ::= T # public: static far
// ::= U # public: virtual near
// ::= V # public: virtual far
// ::= W # public: thunk near
// ::= X # public: thunk far
// ::= Y # global near
// ::= Z # global far
if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
switch (MD->getAccess()) {
default:
case AS_private:
if (MD->isStatic())
Out << 'C';
else if (MD->isVirtual())
Out << 'E';
else
Out << 'A';
break;
case AS_protected:
if (MD->isStatic())
Out << 'K';
else if (MD->isVirtual())
Out << 'M';
else
Out << 'I';
break;
case AS_public:
if (MD->isStatic())
Out << 'S';
else if (MD->isVirtual())
Out << 'U';
else
Out << 'Q';
}
} else
Out << 'Y';
}
void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T,
bool IsInstMethod) {
// <calling-convention> ::= A # __cdecl
// ::= B # __export __cdecl
// ::= C # __pascal
// ::= D # __export __pascal
// ::= E # __thiscall
// ::= F # __export __thiscall
// ::= G # __stdcall
// ::= H # __export __stdcall
// ::= I # __fastcall
// ::= J # __export __fastcall
// The 'export' calling conventions are from a bygone era
// (*cough*Win16*cough*) when functions were declared for export with
// that keyword. (It didn't actually export them, it just made them so
// that they could be in a DLL and somebody from another module could call
// them.)
CallingConv CC = T->getCallConv();
if (CC == CC_Default) {
if (IsInstMethod) {
const FunctionProtoType *FPT =
T->getCanonicalTypeUnqualified().castAs<FunctionProtoType>();
bool isVariadic = FPT->isVariadic();
CC = getASTContext().getDefaultCXXMethodCallConv(isVariadic);
} else {
CC = CC_C;
}
}
switch (CC) {
default:
llvm_unreachable("Unsupported CC for mangling");
case CC_Default:
case CC_C: Out << 'A'; break;
case CC_X86Pascal: Out << 'C'; break;
case CC_X86ThisCall: Out << 'E'; break;
case CC_X86StdCall: Out << 'G'; break;
case CC_X86FastCall: Out << 'I'; break;
}
}
void MicrosoftCXXNameMangler::mangleThrowSpecification(
const FunctionProtoType *FT) {
// <throw-spec> ::= Z # throw(...) (default)
// ::= @ # throw() or __declspec/__attribute__((nothrow))
// ::= <type>+
// NOTE: Since the Microsoft compiler ignores throw specifications, they are
// all actually mangled as 'Z'. (They're ignored because their associated
// functionality isn't implemented, and probably never will be.)
Out << 'Z';
}
void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
SourceRange Range) {
// Probably should be mangled as a template instantiation; need to see what
// VC does first.
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this unresolved dependent type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
// <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
// <union-type> ::= T <name>
// <struct-type> ::= U <name>
// <class-type> ::= V <name>
// <enum-type> ::= W <size> <name>
void MicrosoftCXXNameMangler::mangleType(const EnumType *T, SourceRange) {
mangleType(cast<TagType>(T));
}
void MicrosoftCXXNameMangler::mangleType(const RecordType *T, SourceRange) {
mangleType(cast<TagType>(T));
}
void MicrosoftCXXNameMangler::mangleType(const TagType *T) {
switch (T->getDecl()->getTagKind()) {
case TTK_Union:
Out << 'T';
break;
case TTK_Struct:
case TTK_Interface:
Out << 'U';
break;
case TTK_Class:
Out << 'V';
break;
case TTK_Enum:
Out << 'W';
Out << getASTContext().getTypeSizeInChars(
cast<EnumDecl>(T->getDecl())->getIntegerType()).getQuantity();
break;
}
mangleName(T->getDecl());
}
// <type> ::= <array-type>
// <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
// [Y <dimension-count> <dimension>+]
// <element-type> # as global
// ::= Q <cvr-qualifiers> [Y <dimension-count> <dimension>+]
// <element-type> # as param
// It's supposed to be the other way around, but for some strange reason, it
// isn't. Today this behavior is retained for the sole purpose of backwards
// compatibility.
void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T,
bool IsGlobal) {
// This isn't a recursive mangling, so now we have to do it all in this
// one call.
if (IsGlobal) {
manglePointerQualifiers(T->getElementType().getQualifiers());
} else {
Out << 'Q';
}
mangleType(T->getElementType(), SourceRange());
}
void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T,
SourceRange) {
llvm_unreachable("Should have been special cased");
}
void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T,
SourceRange) {
llvm_unreachable("Should have been special cased");
}
void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
SourceRange) {
llvm_unreachable("Should have been special cased");
}
void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
SourceRange) {
llvm_unreachable("Should have been special cased");
}
void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T,
Qualifiers Quals) {
QualType ElementTy(T, 0);
SmallVector<llvm::APInt, 3> Dimensions;
for (;;) {
if (const ConstantArrayType *CAT =
getASTContext().getAsConstantArrayType(ElementTy)) {
Dimensions.push_back(CAT->getSize());
ElementTy = CAT->getElementType();
} else if (ElementTy->isVariableArrayType()) {
const VariableArrayType *VAT =
getASTContext().getAsVariableArrayType(ElementTy);
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this variable-length array yet");
Diags.Report(VAT->getSizeExpr()->getExprLoc(), DiagID)
<< VAT->getBracketsRange();
return;
} else if (ElementTy->isDependentSizedArrayType()) {
// The dependent expression has to be folded into a constant (TODO).
const DependentSizedArrayType *DSAT =
getASTContext().getAsDependentSizedArrayType(ElementTy);
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this dependent-length array yet");
Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
<< DSAT->getBracketsRange();
return;
} else if (const IncompleteArrayType *IAT =
getASTContext().getAsIncompleteArrayType(ElementTy)) {
Dimensions.push_back(llvm::APInt(32, 0));
ElementTy = IAT->getElementType();
}
else break;
}
Out << 'Y';
// <dimension-count> ::= <number> # number of extra dimensions
mangleNumber(Dimensions.size());
for (unsigned Dim = 0; Dim < Dimensions.size(); ++Dim)
mangleNumber(Dimensions[Dim].getLimitedValue());
mangleType(getASTContext().getQualifiedType(ElementTy.getTypePtr(), Quals),
SourceRange(), QMM_Escape);
}
// <type> ::= <pointer-to-member-type>
// <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
// <class name> <type>
void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T,
SourceRange Range) {
QualType PointeeType = T->getPointeeType();
if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
Out << '8';
mangleName(T->getClass()->castAs<RecordType>()->getDecl());
mangleFunctionType(FPT, NULL, false, true);
} else {
mangleQualifiers(PointeeType.getQualifiers(), true);
mangleName(T->getClass()->castAs<RecordType>()->getDecl());
mangleType(PointeeType, Range, QMM_Drop);
}
}
void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this template type parameter type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(
const SubstTemplateTypeParmPackType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this substituted parameter pack yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
// <type> ::= <pointer-type>
// <pointer-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
void MicrosoftCXXNameMangler::mangleType(const PointerType *T,
SourceRange Range) {
QualType PointeeTy = T->getPointeeType();
mangleType(PointeeTy, Range);
}
void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
SourceRange Range) {
// Object pointers never have qualifiers.
Out << 'A';
mangleType(T->getPointeeType(), Range);
}
// <type> ::= <reference-type>
// <reference-type> ::= A <cvr-qualifiers> <type>
void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
SourceRange Range) {
Out << 'A';
mangleType(T->getPointeeType(), Range);
}
// <type> ::= <r-value-reference-type>
// <r-value-reference-type> ::= $$Q <cvr-qualifiers> <type>
void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
SourceRange Range) {
Out << "$$Q";
mangleType(T->getPointeeType(), Range);
}
void MicrosoftCXXNameMangler::mangleType(const ComplexType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this complex number type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const VectorType *T,
SourceRange Range) {
const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
assert(ET && "vectors with non-builtin elements are unsupported");
uint64_t Width = getASTContext().getTypeSize(T);
// Pattern match exactly the typedefs in our intrinsic headers. Anything that
// doesn't match the Intel types uses a custom mangling below.
bool IntelVector = true;
if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
Out << "T__m64";
} else if (Width == 128 || Width == 256) {
if (ET->getKind() == BuiltinType::Float)
Out << "T__m" << Width;
else if (ET->getKind() == BuiltinType::LongLong)
Out << "T__m" << Width << 'i';
else if (ET->getKind() == BuiltinType::Double)
Out << "U__m" << Width << 'd';
else
IntelVector = false;
} else {
IntelVector = false;
}
if (!IntelVector) {
// The MS ABI doesn't have a special mangling for vector types, so we define
// our own mangling to handle uses of __vector_size__ on user-specified
// types, and for extensions like __v4sf.
Out << "T__clang_vec" << T->getNumElements() << '_';
mangleType(ET, Range);
}
Out << "@@";
}
void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this extended vector type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this dependent-sized extended vector type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T,
SourceRange) {
// ObjC interfaces have structs underlying them.
Out << 'U';
mangleName(T->getDecl());
}
void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T,
SourceRange Range) {
// We don't allow overloading by different protocol qualification,
// so mangling them isn't necessary.
mangleType(T->getBaseType(), Range);
}
void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
SourceRange Range) {
Out << "_E";
QualType pointee = T->getPointeeType();
mangleFunctionType(pointee->castAs<FunctionProtoType>(), NULL, false, false);
}
void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this injected class name type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this template specialization type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this dependent name type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(
const DependentTemplateSpecializationType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this dependent template specialization type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this pack expansion yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this typeof(type) yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this typeof(expression) yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this decltype() yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this unary transform type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const AutoType *T, SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this 'auto' type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftCXXNameMangler::mangleType(const AtomicType *T,
SourceRange Range) {
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this C11 atomic type yet");
Diags.Report(Range.getBegin(), DiagID)
<< Range;
}
void MicrosoftMangleContext::mangleName(const NamedDecl *D,
raw_ostream &Out) {
assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
"Invalid mangleName() call, argument is not a variable or function!");
assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
"Invalid mangleName() call on 'structor decl!");
PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
getASTContext().getSourceManager(),
"Mangling declaration");
MicrosoftCXXNameMangler Mangler(*this, Out);
return Mangler.mangle(D);
}
void MicrosoftMangleContext::mangleThunk(const CXXMethodDecl *MD,
const ThunkInfo &Thunk,
raw_ostream &) {
unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle thunk for this method yet");
getDiags().Report(MD->getLocation(), DiagID);
}
void MicrosoftMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD,
CXXDtorType Type,
const ThisAdjustment &,
raw_ostream &) {
unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle thunk for this destructor yet");
getDiags().Report(DD->getLocation(), DiagID);
}
void MicrosoftMangleContext::mangleCXXVTable(const CXXRecordDecl *RD,
raw_ostream &Out) {
// <mangled-name> ::= ? <operator-name> <class-name> <storage-class>
// <cvr-qualifiers> [<name>] @
// <operator-name> ::= _7 # vftable
// ::= _8 # vbtable
// NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
// is always '6' for vftables and '7' for vbtables. (The difference is
// beyond me.)
// TODO: vbtables.
MicrosoftCXXNameMangler Mangler(*this, Out);
Mangler.getStream() << "\01??_7";
Mangler.mangleName(RD);
Mangler.getStream() << "6B";
// TODO: If the class has more than one vtable, mangle in the class it came
// from.
Mangler.getStream() << '@';
}
void MicrosoftMangleContext::mangleCXXVTT(const CXXRecordDecl *RD,
raw_ostream &) {
llvm_unreachable("The MS C++ ABI does not have virtual table tables!");
}
void MicrosoftMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD,
int64_t Offset,
const CXXRecordDecl *Type,
raw_ostream &) {
llvm_unreachable("The MS C++ ABI does not have constructor vtables!");
}
void MicrosoftMangleContext::mangleCXXRTTI(QualType T,
raw_ostream &) {
// FIXME: Give a location...
unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle RTTI descriptors for type %0 yet");
getDiags().Report(DiagID)
<< T.getBaseTypeIdentifier();
}
void MicrosoftMangleContext::mangleCXXRTTIName(QualType T,
raw_ostream &) {
// FIXME: Give a location...
unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle the name of type %0 into RTTI descriptors yet");
getDiags().Report(DiagID)
<< T.getBaseTypeIdentifier();
}
void MicrosoftMangleContext::mangleCXXCtor(const CXXConstructorDecl *D,
CXXCtorType Type,
raw_ostream & Out) {
MicrosoftCXXNameMangler mangler(*this, Out);
mangler.mangle(D);
}
void MicrosoftMangleContext::mangleCXXDtor(const CXXDestructorDecl *D,
CXXDtorType Type,
raw_ostream & Out) {
MicrosoftCXXNameMangler mangler(*this, Out, D, Type);
mangler.mangle(D);
}
void MicrosoftMangleContext::mangleReferenceTemporary(const clang::VarDecl *VD,
raw_ostream &) {
unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this reference temporary yet");
getDiags().Report(VD->getLocation(), DiagID);
}
MangleContext *clang::createMicrosoftMangleContext(ASTContext &Context,
DiagnosticsEngine &Diags) {
return new MicrosoftMangleContext(Context, Diags);
}
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