[Bug target/120870] [16 regression] CPython miscompiled with preserve_none and CFLAGS="-O2 -march=znver2 -ggdb3"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120870

--- Comment #13 from Sam James <sjames at gcc dot gnu.org> ---
It looks like the last commit this machine built python3.14t at was
r16-1594-gb03e0d69b37f6e which predates preserve_none being added
(r16-1692-g9804b23198b39f).

We had a similar problem in PR120840.