[Bug middle-end/65374] [SH] Tail call optimization not done for libcalls

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65374

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Severity|normal                      |enhancement
   Last reconfirmed|                            |2025-01-07
             Target|sh*-*-*                     |sh*-*-* aarch64*-*

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _1 = __builtin_clz (x_2(D)); [tail call]



For aarch64 we can reproduce it with:
```
unsigned int test (unsigned int x)
{
  return __builtin_popcount (x);
}
```

With -O2  -mgeneral-regs-only .

So confirmed.