LLValue* DtoVirtualFunctionPointer(DValue* inst, FuncDeclaration* fdecl, char* name)
{
// sanity checks
assert(fdecl->isVirtual());
assert(!fdecl->isFinal());
assert(fdecl->vtblIndex > 0); // 0 is always ClassInfo/Interface*
assert(inst->getType()->toBasetype()->ty == Tclass);
// get instance
LLValue* vthis = inst->getRVal();
if (Logger::enabled())
Logger::cout() << "vthis: " << *vthis << '\n';
LLValue* funcval = vthis;
// get the vtbl for objects
funcval = DtoGEPi(funcval, 0, 0, "tmp");
// load vtbl ptr
funcval = DtoLoad(funcval);
// index vtbl
std::string vtblname = name;
vtblname.append("@vtbl");
funcval = DtoGEPi(funcval, 0, fdecl->vtblIndex, vtblname.c_str());
// load funcptr
funcval = DtoAlignedLoad(funcval);
if (Logger::enabled())
Logger::cout() << "funcval: " << *funcval << '\n';
// cast to final funcptr type
funcval = DtoBitCast(funcval, getPtrToType(DtoType(fdecl->type)));
// postpone naming until after casting to get the name in call instructions
funcval->setName(name);
if (Logger::enabled())
Logger::cout() << "funcval casted: " << *funcval << '\n';
return funcval;
}
