[Bug target/120870] [16/17 regression] CPython miscompiled with preserve_none and CFLAGS="-O2 -march=znver2 -ggdb3"

[ubizjak at gmail dot com via Gcc-bugs]

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

--- Comment #49 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #48)

> (insn/f 37 36 38 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [0  S8 A8])
>         (mem/c:DI (plus:DI (reg:DI 41 r13)
>                 (const_int -8 [0xfffffffffffffff8])) [2  S8 A8]))
> "pr120870-1.c":17:1 -1
>      (nil))
Sorry, this one:

(insn/f 40 39 41 2 (set (mem:DI (pre_dec:DI (reg/f:DI 7 sp)) [0  S8 A8])
        (reg:DI 41 r13)) "pr120870-1.c":17:1 -1
     (nil))