[Bug c++/96945] optimizations regression when defaulting copy constructor

[federico.kircheis at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96945

--- Comment #1 from Federico Kircheis <federico.kircheis at gmail dot com> ---
I've made a copy-paste error (I cant change the submitted bug), after B) it
should come C):




Adding and defaulting the constructors, except the move constructor produces
the same code as A): https://godbolt.org/z/ch71fb

C)
----
#include <vector>
struct c {
    c() = default;
    c(const c&) =default;
};
void foo(){
    std::vector<c> vi = {c(),c(),c()};
}
----