[Bug target/119628] Need better mechanisms to manage register saves in callee for tail calls

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

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

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
no_caller_saved_registers only works with XMM and ZMM, not YMM, since YMM load
will clear the upper 256 bits of ZMM.