https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96061
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Alexander Popov from comment #4)
> > Incorrect. There is also a zero_call_used_regs attribute.
>
> Thanks, now I've found it in your tree:
>
> ```
> You can control this behavior for a specific function by using the function
> attribute @code{zero_call_used_regs}.
> ```
>
> Could you explain the connection between your attribute for zeroing
> registers and 'no_caller_saved_registers' attribute?
We are porting
https://gitlab.com/x86-gcc/gcc/-/tree/users/hjl/caller-saved/old
from x86 back-end to middle-end. no_caller_saved_registers changes what
registers zero_call_used_regs can do. Move no_caller_saved_registers to
middle-end has a direct impact on zero_call_used_regs implementation in
middle-end.
