[Bug rtl-optimization/104777] [9/10 Regression] gcc crashes while compiling a custom coroutine library sample

[stsp at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104777

--- Comment #14 from Stas Sergeev <stsp at users dot sourceforge.net> ---
(In reply to Uroš Bizjak from comment #13)
> Please backport the patch also to gcc-10 branch.

9.4.0 fails for me on ubuntu-20.
8.5.0 also fails.
Please back-port to all possible
branches.