[Bug target/94611] gccgo hangs (infinite loop) on complex projects, seemingly in simplify-rtx.c/simplify_plus_minus

[gcc at octaforge dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94611

--- Comment #2 from Daniel Kolesa <gcc at octaforge dot org> ---
It reproduces on any GCC 9.x series, and when building *any* version of the
official Go compiler (tested 1.12-1.14), and many other projects (e.g. gitea).
I'm not sure if it reproduces on x86_64, as I don't have any machines to test
that on available right now (I can test that later). If I knew a specific
revision of gcc in which it started happening, I would've patched it myself,
but bisecting several years worth of gcc development is a bit outside of the
free time I have available right now.

Unfortunately I generally don't use Go, so isolating a test case is harder for
me than for other things