[Bug libstdc++/101406] poor codegen for shared_ptr copy & destory, compared to boost::shared_ptr and libc++'s implementation

[marc.mutz at kdab dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101406

--- Comment #1 from Marc Mutz <marc.mutz at kdab dot com> ---
Comparison to the other two major standard library implementations:
https://godbolt.org/z/crPo44rxo