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

[hjl.tools at gmail dot com via Gcc-bugs]

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

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #5)
> (In reply to Sam James from comment #0)
> > ```
> > $ git clone https://github.com/python/cpython
> > $ git rev-parse HEAD
> > 698bab5a4031c8f54e04e1dd42bcbe3e4564eba5
> > $ ./configure --with-tail-call-interp --disable-gil --enable-optimizations
> > CFLAGS="-O2 -march=znver2 -ggdb3"
> >
> 
> $ ./configure --with-tail-call-interp CFLAGS="-O2 -march=znver2 -ggdb3"
> 
> also failed to build.

$ ./configure --with-tail-call-interp --disable-gil --enable-optimizations

works.