[Bug target/118276] memset 88 uses rep stosq while 80 uses SSE

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118276

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Adding empty c'tor to       |memset 88 uses rep stosq
                   |struct of C-array and       |while 80 uses SSE
                   |integer improves codegen    |

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The difference comes down to:

```
void g(void*);
void f11()
{
  long a[11]={}
  g(a);
}
void f10()
{
  long a[10] = {};
  g(a);
}
```