[Bug target/119628] Need better mechanisms to manage register saves in callee for tail calls (inc. preserve_none for x86_64?)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119628

--- Comment #25 from Sam James <sjames at gcc dot gnu.org> ---
Let's carry on in a new bug: PR120840.