path: root/lib/CodeGen/Mangle.cpp

//===--- Mangle.cpp - Mangle C++ Names --------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements C++ name mangling according to the Itanium C++ ABI,
// which is used in GCC 3.2 and newer (and many compilers that are
// ABI-compatible with GCC):
//
//   http://www.codesourcery.com/public/cxx-abi/abi.html
//
//===----------------------------------------------------------------------===//
#include "Mangle.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/ErrorHandling.h"
using namespace clang;

namespace {
  class VISIBILITY_HIDDEN CXXNameMangler {
    ASTContext &Context;
    llvm::raw_ostream &Out;

    const CXXMethodDecl *Structor;
    unsigned StructorType;
    CXXCtorType CtorType;

    llvm::DenseMap<uintptr_t, unsigned> Substitutions;
    
  public:
    CXXNameMangler(ASTContext &C, llvm::raw_ostream &os)
      : Context(C), Out(os), Structor(0), StructorType(0) { }

    bool mangle(const NamedDecl *D);
    void mangleCalloffset(int64_t nv, int64_t v);
    void mangleThunk(const FunctionDecl *FD, int64_t nv, int64_t v);
    void mangleCovariantThunk(const FunctionDecl *FD,
                              int64_t nv_t, int64_t v_t,
                              int64_t nv_r, int64_t v_r);
    void mangleGuardVariable(const VarDecl *D);

    void mangleCXXVtable(QualType Type);
    void mangleCXXRtti(QualType Type);
    void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type);
    void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type);

  private:
    bool mangleSubstitution(const NamedDecl *ND);
    bool mangleSubstitution(QualType T);
    bool mangleSubstitution(uintptr_t Ptr);
    
    void addSubstitution(const NamedDecl *ND) {
      addSubstitution(reinterpret_cast<uintptr_t>(ND));
    }
    void addSubstitution(QualType T);
    void addSubstitution(uintptr_t Ptr);
    
    bool mangleFunctionDecl(const FunctionDecl *FD);

    void mangleFunctionEncoding(const FunctionDecl *FD);
    void mangleName(const NamedDecl *ND);
    void mangleName(const TemplateDecl *TD, 
                    const TemplateArgument *TemplateArgs,
                    unsigned NumTemplateArgs);
    void mangleUnqualifiedName(const NamedDecl *ND);
    void mangleUnscopedName(const NamedDecl *ND);
    void mangleUnscopedTemplateName(const TemplateDecl *ND);
    void mangleSourceName(const IdentifierInfo *II);
    void mangleLocalName