[Bug target/121274] [14/15/16 Regression] xmm extraction from zmm vector emits unnecessary vpextrq/vpinsrq sequence

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121274

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is another related testcase:
```
using V [[gnu::vector_size(16)]] = int;

auto f(__int128 *x)
{
  __int128 t = *x;
  asm("":"+x"(t));
  return (V)t;
}
```

Where GCC 13.4.0 was producing good code while the 14+ does not.
Yes TImode is similar issue for both of them.