[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 #8 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 61120
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61120&action=edit
A tested patch