[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 #17 from linzj <manjian2006 at gmail dot com> ---
After this patch the code still have redundant  calls for the inline pass has
finished. But the indirect function calls has been removed.