[Bug rtl-optimization/121920] ICE (SIGSEGV, NULL-ptr reference) in rtl_ssa::clobber_info::recompute_group() with -O2 -std=gnu11 -fstack-protector-strong on mips64el

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121920

--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
It's appreciated, especially because for some reason, the other bug didn't show
up for ages *and* it only happened with LTO which made reducing it a pain too.
Thank you!

We should probably add the testcase either way.