[Bug middle-end/91459] Tail-Call Optimization is not performed when return value is assumed.

[mike.k at digitalcarbide dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91459

--- Comment #1 from mike.k at digitalcarbide dot com ---
'foo3' in the assembly output should be 'foo2'. I'd changed the function name
in my test code and did not update the assembly. Apologies.