[Bug rtl-optimization/96539] Unnecessary no-op copy with Os and tail call with struct argument

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96539

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But it doesn't have to kick everywhere, it depends on lots of target details
whether it will do a noop copy or not.