Displaying 2 results from an estimated 2 matches for "derived_vtable".
2016 Jan 28
8
Proposal: virtual constant propagation
...compiler, calls to either of these functions can be implemented more
efficiently by loading directly from the vtable (we refer to this as virtual
constant propagation):
struct Base_VTable {
bool isDerived : 1, isOfTypeBase : 1, isOfTypeDerived : 1;
};
Base_VTable base_vtable{false, true, false};
Derived_VTable derived_vtable{true, false, true};
bool f(Base *b) {
return b->vtable->isDerived;
}
bool g(Base *b) {
return b->vtable->isOfTypeDerived;
}
Another advantage of implementing the calls this way is that because there
is no indirect call taking place, no control flow integrity check is...
2016 Jan 28
2
Proposal: virtual constant propagation
...gt;> efficiently by loading directly from the vtable (we refer to this as virtual
>> constant propagation):
>>
>> struct Base_VTable {
>> bool isDerived : 1, isOfTypeBase : 1, isOfTypeDerived : 1;
>> };
>> Base_VTable base_vtable{false, true, false};
>> Derived_VTable derived_vtable{true, false, true};
>> bool f(Base *b) {
>> return b->vtable->isDerived;
>> }
>> bool g(Base *b) {
>> return b->vtable->isOfTypeDerived;
>> }
>>
>> Another advantage of implementing the calls this way is that because there...