https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96061
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-07-04
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Alexander Popov from comment #0)
> This is an enhancement request.
>
> GCC currently supports 'no_caller_saved_registers' attribute only for x86.
> Clang supports it for all target architectures.
We are working on -fzero-call-used-regs:
https://gitlab.com/x86-gcc/gcc/-/tree/users/qinzhao/caller-saved/master
They are related.