[Bug target/96562] Rather poor assembly generated for copy-list-initialization in return statement.

[maxim.yegorushkin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96562

--- Comment #5 from Maxim Egorushkin <maxim.yegorushkin at gmail dot com> ---
(In reply to H.J. Lu from comment #2)
> Add -mavx to -O2 triggers this.

The bug seems to be caused by -msse4.1, -mno-sse4.1 fixes it.

Changing size from `unsigned` to `unsigned long` makes the bug disappear.