[Bug tree-optimization/84824] DCE fails to remove dead code of std::function constructor

[manjian2006 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84824

--- Comment #9 from linzj <manjian2006 at gmail dot com> ---
sra may not relate to this problem. I make sra get involved, because fre fails
to recognise a mem ref and a component ref are the same reference. Maybe we
should work on fre