예제 #1
0
파일: functions.cpp 프로젝트: Axure/ldc
llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl)
{
    // handle for C vararg intrinsics
    if (DtoIsVaIntrinsic(fdecl))
        return DtoVaFunctionType(fdecl);

    Type *dthis=0, *dnest=0;

    if (fdecl->ident == Id::ensure || fdecl->ident == Id::require) {
        FuncDeclaration *p = fdecl->parent->isFuncDeclaration();
        assert(p);
        AggregateDeclaration *ad = p->isMember2();
        assert(ad);
        dnest = Type::tvoid->pointerTo();
    } else
    if (fdecl->needThis()) {
        if (AggregateDeclaration* ad = fdecl->isMember2()) {
            IF_LOG Logger::println("isMember = this is: %s", ad->type->toChars());
            dthis = ad->type;
            LLType* thisty = DtoType(dthis);
            //Logger::cout() << "this llvm type: " << *thisty << '\n';
            if (ad->isStructDeclaration())
                thisty = getPtrToType(thisty);
        }
        else {
            IF_LOG Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind());
            llvm_unreachable("needThis, but invalid parent declaration.");
        }
    }
    else if (fdecl->isNested()) {
        dnest = Type::tvoid->pointerTo();
    }

    LLFunctionType* functype = DtoFunctionType(fdecl->type, getIrFunc(fdecl, true)->irFty, dthis, dnest,
                                               fdecl->isMain(), fdecl->isCtorDeclaration(),
                                               fdecl->llvmInternal == LLVMintrinsic);

    return functype;
}
예제 #2
0
파일: pragma.cpp 프로젝트: mleise/ldc
bool DtoIsIntrinsic(FuncDeclaration *fd)
{
    return (fd->llvmInternal == LLVMintrinsic || DtoIsVaIntrinsic(fd));
}
예제 #3
0
파일: functions.cpp 프로젝트: Axure/ldc
void DtoDeclareFunction(FuncDeclaration* fdecl)
{
    DtoResolveFunction(fdecl);

    if (fdecl->ir.isDeclared()) return;
    fdecl->ir.setDeclared();

    IF_LOG Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars());
    LOG_SCOPE;

    if (fdecl->isUnitTestDeclaration() && !global.params.useUnitTests)
    {
        Logger::println("unit tests not enabled");
        return;
    }

    //printf("declare function: %s\n", fdecl->toPrettyChars());

    // intrinsic sanity check
    if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) {
        error(fdecl->loc, "intrinsics cannot have function bodies");
        fatal();
    }

    // get TypeFunction*
    Type* t = fdecl->type->toBasetype();
    TypeFunction* f = static_cast<TypeFunction*>(t);

    // create IrFunction
    IrFunction *irFunc = getIrFunc(fdecl, true);

    LLFunction* vafunc = 0;
    if (DtoIsVaIntrinsic(fdecl))
        vafunc = DtoDeclareVaFunction(fdecl);

    // calling convention
    LINK link = f->linkage;
    if (vafunc || fdecl->llvmInternal == LLVMintrinsic
        // DMD treats _Dmain as having C calling convention and this has been
        // hardcoded into druntime, even if the frontend type has D linkage.
        // See Bugzilla issue 9028.
        || fdecl->isMain()
    )
    {
        link = LINKc;
    }

    // mangled name
    std::string mangledName(mangleExact(fdecl));
    mangledName = gABI->mangleForLLVM(mangledName, link);

    // construct function
    LLFunctionType* functype = DtoFunctionType(fdecl);
    LLFunction* func = vafunc ? vafunc : gIR->module->getFunction(mangledName);
    if (!func) {
        if(fdecl->llvmInternal == LLVMinline_ir)
        {
            func = DtoInlineIRFunction(fdecl);
        }
        else
        {
            // All function declarations are "external" - any other linkage type
            // is set when actually defining the function.
            func = LLFunction::Create(functype,
                llvm::GlobalValue::ExternalLinkage, mangledName, gIR->module);
        }
    } else if (func->getFunctionType() != functype) {
        error(fdecl->loc, "Function type does not match previously declared function with the same mangled name: %s", mangleExact(fdecl));
        fatal();
    }

    func->setCallingConv(gABI->callingConv(link));

    IF_LOG Logger::cout() << "func = " << *func << std::endl;

    // add func to IRFunc
    irFunc->func = func;

    // parameter attributes
    if (!DtoIsIntrinsic(fdecl)) {
        set_param_attrs(f, func, fdecl);
        if (global.params.disableRedZone) {
            func->addFnAttr(LDC_ATTRIBUTE(NoRedZone));
        }
    }

    // main
    if (fdecl->isMain()) {
        // Detect multiple main functions, which is disallowed. DMD checks this
        // in the glue code, so we need to do it here as well.
        if (gIR->mainFunc) {
            error(fdecl->loc, "only one main function allowed");
        }
        gIR->mainFunc = func;
    }

    if (fdecl->neverInline)
    {
        irFunc->setNeverInline();
    }

    if (fdecl->llvmInternal == LLVMglobal_crt_ctor || fdecl->llvmInternal == LLVMglobal_crt_dtor)
    {
        AppendFunctionToLLVMGlobalCtorsDtors(func, fdecl->priority, fdecl->llvmInternal == LLVMglobal_crt_ctor);
    }

    IrFuncTy &irFty = irFunc->irFty;

    // if (!declareOnly)
    {
        // name parameters
        llvm::Function::arg_iterator iarg = func->arg_begin();

        if (irFty.arg_sret) {
            iarg->setName(".sret_arg");
            irFunc->retArg = iarg;
            ++iarg;
        }

        if (irFty.arg_this) {
            iarg->setName(".this_arg");
            irFunc->thisArg = iarg;

            VarDeclaration* v = fdecl->vthis;
            if (v) {
                // We already build the this argument here if we will need it
                // later for codegen'ing the function, just as normal
                // parameters below, because it can be referred to in nested
                // context types. Will be given storage in DtoDefineFunction.
                assert(!isIrParameterCreated(v));
                IrParameter *irParam = getIrParameter(v, true);
                irParam->value = iarg;
                irParam->arg = irFty.arg_this;
                irParam->isVthis = true;
            }

            ++iarg;
        }
        else if (irFty.arg_nest) {
            iarg->setName(".nest_arg");
            irFunc->nestArg = iarg;
            assert(irFunc->nestArg);
            ++iarg;
        }

        if (irFty.arg_arguments) {
            iarg->setName("._arguments");
            irFunc->_arguments = iarg;
            ++iarg;
        }

        // we never reference parameters of function prototypes
        unsigned int k = 0;
        for (; iarg != func->arg_end(); ++iarg)
        {
            if (fdecl->parameters && fdecl->parameters->dim > k)
            {
                int paramIndex = irFty.reverseParams ? fdecl->parameters->dim-k-1 : k;
                Dsymbol* argsym = static_cast<Dsymbol*>(fdecl->parameters->data[paramIndex]);

                VarDeclaration* argvd = argsym->isVarDeclaration();
                assert(argvd);
                assert(!isIrLocalCreated(argvd));
                std::string str(argvd->ident->toChars());
                str.append("_arg");
                iarg->setName(str);

                IrParameter *irParam = getIrParameter(argvd, true);
                irParam->value = iarg;
                irParam->arg = irFty.args[paramIndex];

                k++;
            }
            else
            {
                iarg->setName("unnamed");
            }
        }
    }
}