[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 #15 from linzj <manjian2006 at gmail dot com> ---
The structalias solve_graph is not resolving the nodes reachable from a source
node, which make my try fail.