[Bug middle-end/128010] aarch64 has no asm clobber syntax for the top bits of sve z regs needed by syscalls

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128010

--- Comment #3 from nsz at gcc dot gnu.org ---
for the record the linux syscall abi:
https://www.kernel.org/doc/html/latest/arch/arm64/sve.html#system-call-behaviour