https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96717
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
template<typename T>
struct vector
{
using pointer = T*;
pointer begin, end, end_of_storage;
void pop_back()
{
(end--)->~T();
}
};
using size_t = decltype(sizeof(0));
void pop_many(vector<int>& v, size_t n) {
for (size_t i = 0; i < n; ++i) {
v.pop_back();
}
}
With -O2 -fno-lifetime-dse we get the expected code back.
