C++ TypeStruct::hasPointers方法代码示例

void TypeInfoStructDeclaration::toDt(dt_t **pdt)
{
    //printf("TypeInfoStructDeclaration::toDt() '%s'\n", toChars());
    if (global.params.is64bit)
        verifyStructSize(Type::typeinfostruct, 17 * Target::ptrsize);
    else
        verifyStructSize(Type::typeinfostruct, 15 * Target::ptrsize);

    dtxoff(pdt, Type::typeinfostruct->toVtblSymbol(), 0); // vtbl for TypeInfo_Struct
    dtsize_t(pdt, 0);                        // monitor

    assert(tinfo->ty == Tstruct);

    TypeStruct *tc = (TypeStruct *)tinfo;
    StructDeclaration *sd = tc->sym;

    if (!sd->members)
        return;

    /* Put out:
     *  char[] name;
     *  void[] init;
     *  hash_t function(in void*) xtoHash;
     *  bool function(in void*, in void*) xopEquals;
     *  int function(in void*, in void*) xopCmp;
     *  string function(const(void)*) xtoString;
     *  StructFlags m_flags;
     *  //xgetMembers;
     *  xdtor;
     *  xpostblit;
     *  uint m_align;
     *  version (X86_64)
     *      TypeInfo m_arg1;
     *      TypeInfo m_arg2;
     *  xgetRTInfo
     */

    const char *name = sd->toPrettyChars();
    size_t namelen = strlen(name);
    dtsize_t(pdt, namelen);
    dtabytes(pdt, 0, namelen + 1, name);

    // void[] init;
    dtsize_t(pdt, sd->structsize);       // init.length
    if (sd->zeroInit)
        dtsize_t(pdt, 0);                // NULL for 0 initialization
    else
        dtxoff(pdt, sd->toInitializer(), 0);    // init.ptr

    if (FuncDeclaration *fd = search_toHash(sd))
    {
        dtxoff(pdt, fd->toSymbol(), 0);
        TypeFunction *tf = (TypeFunction *)fd->type;
        assert(tf->ty == Tfunction);
        /* I'm a little unsure this is the right way to do it. Perhaps a better
         * way would to automatically add these attributes to any struct member
         * function with the name "toHash".
         * So I'm leaving this here as an experiment for the moment.
         */
        if (!tf->isnothrow || tf->trust == TRUSTsystem /*|| tf->purity == PUREimpure*/)
            warning(fd->loc, "toHash() must be declared as extern (D) size_t toHash() const nothrow @safe, not %s", tf->toChars());
    }
    else
        dtsize_t(pdt, 0);

    if (sd->xeq)
        dtxoff(pdt, sd->xeq->toSymbol(), 0);
    else
        dtsize_t(pdt, 0);

    if (sd->xcmp)
        dtxoff(pdt, sd->xcmp->toSymbol(), 0);
    else
        dtsize_t(pdt, 0);

    if (FuncDeclaration *fd = search_toString(sd))
    {
        dtxoff(pdt, fd->toSymbol(), 0);
    }
    else
        dtsize_t(pdt, 0);

    // StructFlags m_flags;
    StructFlags::Type m_flags = 0;
    if (tc->hasPointers()) m_flags |= StructFlags::hasPointers;
    dtsize_t(pdt, m_flags);

#if DMDV2
#if 0
    // xgetMembers
    FuncDeclaration *sgetmembers = sd->findGetMembers();
    if (sgetmembers)
        dtxoff(pdt, sgetmembers->toSymbol(), 0);
    else
        dtsize_t(pdt, 0);                        // xgetMembers
#endif

    // xdtor
    FuncDeclaration *sdtor = sd->dtor;
    if (sdtor)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
          Declaration_codegen(sd->xcmp);
        }
        if (FuncDeclaration *ftostr = search_toString(sd)) {
          if (ftostr->semanticRun >= PASSsemantic3)
            Declaration_codegen(ftostr);
        }
        if (sd->xhash && sd->xhash->semanticRun >= PASSsemantic3) {
          Declaration_codegen(sd->xhash);
        }
        if (sd->postblit && sd->postblit->semanticRun >= PASSsemantic3) {
          Declaration_codegen(sd->postblit);
        }
        if (sd->dtor && sd->dtor->semanticRun >= PASSsemantic3) {
          Declaration_codegen(sd->dtor);
        }
        if (sd->tidtor && sd->tidtor->semanticRun >= PASSsemantic3) {
          Declaration_codegen(sd->tidtor);
        }
      }
    }

    IrAggr *iraggr = getIrAggr(sd);

    // string name
    b.push_string(sd->toPrettyChars());

    // void[] m_init
    // The protocol is to write a null pointer for zero-initialized arrays. The
    // length field is always needed for tsize().
    llvm::Constant *initPtr;
    if (tc->isZeroInit(Loc())) {
      initPtr = getNullValue(getVoidPtrType());
    } else {
      initPtr = iraggr->getInitSymbol();
    }
    b.push_void_array(getTypeStoreSize(DtoType(tc)), initPtr);

    // function xtoHash
    FuncDeclaration *fd = sd->xhash;
    b.push_funcptr(fd);

    // function xopEquals
    fd = sd->xeq;
    b.push_funcptr(fd);

    // function xopCmp
    fd = sd->xcmp;
    b.push_funcptr(fd);

    // function xtoString
    fd = search_toString(sd);
    b.push_funcptr(fd);

    // uint m_flags
    unsigned hasptrs = tc->hasPointers() ? 1 : 0;
    b.push_uint(hasptrs);

    // function xdtor/xdtorti
    b.push_funcptr(sd->tidtor);

    // function xpostblit
    FuncDeclaration *xpostblit = sd->postblit;
    if (xpostblit && sd->postblit->storage_class & STCdisable) {
      xpostblit = nullptr;
    }
    b.push_funcptr(xpostblit);

    // uint m_align
    b.push_uint(DtoAlignment(tc));

    if (isX86_64) {
      // TypeInfo m_arg1
      // TypeInfo m_arg2
      Type *t = sd->arg1type;
      for (unsigned i = 0; i < 2; i++) {
        if (t) {
          t = merge(t);
          b.push_typeinfo(t);
        } else {
          b.push_null(getTypeInfoType());
        }

        t = sd->arg2type;
      }
    }

    // immutable(void)* m_RTInfo
    // The cases where getRTInfo is null are not quite here, but the code is
    // modelled after what DMD does.
    if (sd->getRTInfo) {
      b.push(toConstElem(sd->getRTInfo, gIR));
    } else if (!tc->hasPointers()) {
      b.push_size_as_vp(0); // no pointers
    } else {
      b.push_size_as_vp(1); // has pointers
    }

    // finish
    b.finalize(gvar);
  }

//.........这里部分代码省略.........
    }

    s = search_function(sd, Id::tohash);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftohash);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) uint toHash()");
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    if (sd->eq)
        dtxoff(pdt, sd->eq->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);

    s = search_function(sd, Id::cmp);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {
        //printf("test1 %s, %s, %s\n", fdx->toChars(), fdx->type->toChars(), tfeqptr->toChars());
        fd = fdx->overloadExactMatch(tfcmpptr);
        if (fd)
        {   dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
            //printf("test2\n");
        }
        else
            //fdx->error("must be declared as extern (D) int %s(%s*)", fdx->toChars(), sd->toChars());
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    s = search_function(sd, Id::tostring);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftostring);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) char[] toString()");
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    // uint m_flags;
    dtsize_t(pdt, tc->hasPointers());

#if DMDV2
    // xgetMembers
    FuncDeclaration *sgetmembers = sd->findGetMembers();
    if (sgetmembers)
        dtxoff(pdt, sgetmembers->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xgetMembers

    // xdtor
    FuncDeclaration *sdtor = sd->dtor;
    if (sdtor)
        dtxoff(pdt, sdtor->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xdtor

    // xpostblit
    FuncDeclaration *spostblit = sd->postblit;
    if (spostblit && !(spostblit->storage_class & STCdisable))
        dtxoff(pdt, spostblit->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xpostblit
#endif

    // uint m_align;
    dtsize_t(pdt, tc->alignsize());

    if (global.params.is64bit)
    {
        TypeTuple *tup = tc->toArgTypes();
        assert(tup->arguments->dim <= 2);
        for (int i = 0; i < 2; i++)
        {
            if (i < tup->arguments->dim)
            {
                Type *targ = (tup->arguments->tdata()[i])->type;
                targ = targ->merge();
                targ->getTypeInfo(NULL);
                dtxoff(pdt, targ->vtinfo->toSymbol(), 0, TYnptr);       // m_argi
            }
            else
                dtsize_t(pdt, 0);                    // m_argi
        }
    }

    // name[]
    dtnbytes(pdt, namelen + 1, name);
}

//.........这里部分代码省略.........
            //fdx->error("must be declared as extern (D) uint toHash()");
            dtsize_t(pdt, 0);
        }
    }
    else
        dtsize_t(pdt, 0);

    if (sd->xeq)
        dtxoff(pdt, sd->xeq->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);

    s = search_function(sd, Id::cmp);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {
        //printf("test1 %s, %s, %s\n", fdx->toChars(), fdx->type->toChars(), tfeqptr->toChars());
        fd = fdx->overloadExactMatch(tfcmpptr);
        if (fd)
        {   dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
            //printf("test2\n");
        }
        else
            //fdx->error("must be declared as extern (D) int %s(%s*)", fdx->toChars(), sd->toChars());
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    s = search_function(sd, Id::tostring);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftostring);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) char[] toString()");
            dtsize_t(pdt, 0);
    }
    else
        dtsize_t(pdt, 0);

    // uint m_flags;
    size_t m_flags = tc->hasPointers();
    dtsize_t(pdt, m_flags);

#if DMDV2
#if 0
    // xgetMembers
    FuncDeclaration *sgetmembers = sd->findGetMembers();
    if (sgetmembers)
        dtxoff(pdt, sgetmembers->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xgetMembers
#endif

    // xdtor
    FuncDeclaration *sdtor = sd->dtor;
    if (sdtor)
        dtxoff(pdt, sdtor->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xdtor

    // xpostblit
    FuncDeclaration *spostblit = sd->postblit;
    if (spostblit && !(spostblit->storage_class & STCdisable))
        dtxoff(pdt, spostblit->toSymbol(), 0, TYnptr);
    else
        dtsize_t(pdt, 0);                        // xpostblit
#endif

    // uint m_align;
    dtsize_t(pdt, tc->alignsize());

    if (global.params.is64bit)
    {
        Type *t = sd->arg1type;
        for (int i = 0; i < 2; i++)
        {
            // m_argi
            if (t)
            {
                t->getTypeInfo(NULL);
                dtxoff(pdt, t->vtinfo->toSymbol(), 0, TYnptr);
            }
            else
                dtsize_t(pdt, 0);

            t = sd->arg2type;
        }
    }

    // xgetRTInfo
    if (sd->getRTInfo)
        sd->getRTInfo->toDt(pdt);
    else if (m_flags)
        dtsize_t(pdt, 1);       // has pointers
    else
        dtsize_t(pdt, 0);       // no pointers
}

void TypeInfoStructDeclaration::llvmDefine()
{
    Logger::println("TypeInfoStructDeclaration::llvmDefine() %s", toChars());
    LOG_SCOPE;

    // make sure struct is resolved
    assert(tinfo->ty == Tstruct);
    TypeStruct *tc = static_cast<TypeStruct *>(tinfo);
    StructDeclaration *sd = tc->sym;

    // can't emit typeinfo for forward declarations
    if (sd->sizeok != 1)
    {
        sd->error("cannot emit TypeInfo for forward declaration");
        fatal();
    }

    sd->codegen(Type::sir);
    IrStruct* irstruct = sd->ir.irStruct;

    RTTIBuilder b(Type::typeinfostruct);

    // char[] name
    b.push_string(sd->toPrettyChars());

    // void[] init
    // never emit a null array, even for zero initialized typeinfo
    // the size() method uses this array!
    size_t init_size = getTypeStoreSize(tc->irtype->getType());
    b.push_void_array(init_size, irstruct->getInitSymbol());

    // toX functions ground work
    static TypeFunction *tftohash;
    static TypeFunction *tftostring;

    if (!tftohash)
    {
        Scope sc;
        tftohash = new TypeFunction(NULL, Type::thash_t, 0, LINKd);
#if DMDV2
        tftohash ->mod = MODconst;
#endif
        tftohash = static_cast<TypeFunction *>(tftohash->semantic(0, &sc));

#if DMDV2
        Type *retType = Type::tchar->invariantOf()->arrayOf();
#else
        Type *retType = Type::tchar->arrayOf();
#endif
        tftostring = new TypeFunction(NULL, retType, 0, LINKd);
        tftostring = static_cast<TypeFunction *>(tftostring->semantic(0, &sc));
    }

    // this one takes a parameter, so we need to build a new one each time
    // to get the right type. can we avoid this?
    TypeFunction *tfcmpptr;
    {
        Scope sc;
        Parameters *arguments = new Parameters;
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif
        arguments->push(arg);
        tfcmpptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
#if DMDV2
        tfcmpptr->mod = MODconst;
#endif
        tfcmpptr = static_cast<TypeFunction *>(tfcmpptr->semantic(0, &sc));
    }

    // well use this module for all overload lookups
    Module *gm = getModule();

    // toHash
    FuncDeclaration* fd = find_method_overload(sd, Id::tohash, tftohash, gm);
    b.push_funcptr(fd);

    // opEquals
#if DMDV2
    fd = sd->xeq;
#else
    fd = find_method_overload(sd, Id::eq, tfcmpptr, gm);
#endif
    b.push_funcptr(fd);

    // opCmp
    fd = find_method_overload(sd, Id::cmp, tfcmpptr, gm);
    b.push_funcptr(fd);

    // toString
    fd = find_method_overload(sd, Id::tostring, tftostring, gm);
    b.push_funcptr(fd);

    // uint m_flags;
    unsigned hasptrs = tc->hasPointers() ? 1 : 0;
    b.push_uint(hasptrs);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
#if STRUCTTHISREF
        // arg type is ref const T
        Parameter *arg = new Parameter(STCref, tc->constOf(), NULL, NULL);
#else
        // arg type is const T*
        Parameter *arg = new Parameter(STCin, tc->pointerTo(), NULL, NULL);
#endif

        arguments->push(arg);
        tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfeqptr = (TypeFunction *)tfeqptr->semantic(0, &sc);
    }

#if 0
    TypeFunction *tfeq;
    {
        Scope sc;
        Array *arguments = new Array;
        Parameter *arg = new Parameter(In, tc, NULL, NULL);

        arguments->push(arg);
        tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd);
        tfeq = (TypeFunction *)tfeq->semantic(0, &sc);
    }
#endif

    s = search_function(sd, Id::tohash);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftohash);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) uint toHash()");
            dtdword(pdt, 0);
    }
    else
        dtdword(pdt, 0);

    s = search_function(sd, Id::eq);
    fdx = s ? s->isFuncDeclaration() : NULL;
    for (int i = 0; i < 2; i++)
    {
        if (fdx)
        {   fd = fdx->overloadExactMatch(tfeqptr);
            if (fd)
                dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
            else
                //fdx->error("must be declared as extern (D) int %s(%s*)", fdx->toChars(), sd->toChars());
                dtdword(pdt, 0);
        }
        else
            //fdx->error("must be declared as extern (D) int %s(%s*)", fdx->toChars(), sd->toChars());
            dtdword(pdt, 0);

        s = search_function(sd, Id::cmp);
        fdx = s ? s->isFuncDeclaration() : NULL;
    }

    s = search_function(sd, Id::tostring);
    fdx = s ? s->isFuncDeclaration() : NULL;
    if (fdx)
    {   fd = fdx->overloadExactMatch(tftostring);
        if (fd)
            dtxoff(pdt, fd->toSymbol(), 0, TYnptr);
        else
            //fdx->error("must be declared as extern (D) char[] toString()");
            dtdword(pdt, 0);
    }
    else
        dtdword(pdt, 0);

    // uint m_flags;
    dtdword(pdt, tc->hasPointers());

#if DMDV2
    // xgetMembers
    FuncDeclaration *sgetmembers = sd->findGetMembers();
    if (sgetmembers)
        dtxoff(pdt, sgetmembers->toSymbol(), 0, TYnptr);
    else
        dtdword(pdt, 0);                        // xgetMembers

    // xdtor
    FuncDeclaration *sdtor = sd->dtor;
    if (sdtor)
        dtxoff(pdt, sdtor->toSymbol(), 0, TYnptr);
    else
        dtdword(pdt, 0);                        // xdtor

    // xpostblit
    FuncDeclaration *spostblit = sd->postblit;
    if (spostblit)
        dtxoff(pdt, spostblit->toSymbol(), 0, TYnptr);
    else
        dtdword(pdt, 0);                        // xpostblit
#endif
    // name[]
    dtnbytes(pdt, namelen + 1, name);
}

    void visit(TypeInfoStructDeclaration *decl)
    {
        IF_LOG Logger::println("TypeInfoStructDeclaration::llvmDefine() %s", decl->toChars());
        LOG_SCOPE;

        // make sure struct is resolved
        assert(decl->tinfo->ty == Tstruct);
        TypeStruct *tc = static_cast<TypeStruct *>(decl->tinfo);
        StructDeclaration *sd = tc->sym;

        // handle opaque structs
        if (!sd->members) {
            RTTIBuilder b(Type::typeinfostruct);
            b.finalize(getIrGlobal(decl));
            return;
        }

        // can't emit typeinfo for forward declarations
        if (sd->sizeok != SIZEOKdone)
        {
            sd->error("cannot emit TypeInfo for forward declaration");
            fatal();
        }

        DtoResolveStruct(sd);
        IrAggr* iraggr = getIrAggr(sd);

        RTTIBuilder b(Type::typeinfostruct);

        // char[] name
        b.push_string(sd->toPrettyChars());

        // void[] init
        // The protocol is to write a null pointer for zero-initialized arrays. The
        // length field is always needed for tsize().
        llvm::Constant *initPtr;
        if (tc->isZeroInit(Loc()))
            initPtr = getNullValue(getVoidPtrType());
        else
            initPtr = iraggr->getInitSymbol();
        b.push_void_array(getTypeStoreSize(DtoType(tc)), initPtr);

        // well use this module for all overload lookups

        // toHash
        FuncDeclaration* fd = sd->xhash;
        b.push_funcptr(fd);

        // opEquals
        fd = sd->xeq;
        b.push_funcptr(fd);

        // opCmp
        fd = sd->xcmp;
        b.push_funcptr(fd);

        // toString
        fd = search_toString(sd);
        b.push_funcptr(fd);

        // uint m_flags;
        unsigned hasptrs = tc->hasPointers() ? 1 : 0;
        b.push_uint(hasptrs);

        // On x86_64, class TypeInfo_Struct contains 2 additional fields
        // (m_arg1/m_arg2) which are used for the X86_64 System V ABI varargs
        // implementation. They are not present on any other cpu/os.
        assert((global.params.targetTriple.getArch() != llvm::Triple::x86_64 && Type::typeinfostruct->fields.dim == 11) ||
               (global.params.targetTriple.getArch() == llvm::Triple::x86_64 && Type::typeinfostruct->fields.dim == 13));

        //void function(void*)                    xdtor;
        b.push_funcptr(sd->dtor);

        //void function(void*)                    xpostblit;
        FuncDeclaration *xpostblit = sd->postblit;
        if (xpostblit && sd->postblit->storage_class & STCdisable)
            xpostblit = 0;
        b.push_funcptr(xpostblit);

        //uint m_align;
        b.push_uint(tc->alignsize());

        if (global.params.is64bit)
        {
            // TypeInfo m_arg1;
            // TypeInfo m_arg2;
            Type *t = sd->arg1type;
            for (unsigned i = 0; i < 2; i++)
            {
                if (t)
                {
                    t = t->merge();
                    b.push_typeinfo(t);
                }
                else
                    b.push_null(Type::dtypeinfo->type);

                t = sd->arg2type;
            }
        }
//.........这里部分代码省略.........