https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112335
Bug ID: 112335
Summary: missed optimization on reset and assign unique_ptr
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: federico at kircheis dot it
Target Milestone: ---
Given following snippet
----
#include <memory>
struct s{
s();
~s() noexcept;
};
void bar1(std::unique_ptr<s>& ps1, std::unique_ptr<s>& ps2){
ps1.reset();
ps1 = std::move(ps2);
}
void bar2(std::unique_ptr<s>& ps1, std::unique_ptr<s>& ps2){
ps1 = std::move(ps2);
}
----
If I am not mistaken, bar1 and bar2 should have exactly the same behavior, but
on https://godbolt.org/z/q4nKsPq7z it is possible to see that the generated
code differs.
