https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109605
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-05-17
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Take a simple LP64 testcase (just to make the aliasing happy):
```
int f1(long long *a, long *b, long *c)
{
long a0, a1;
a[0] = b[0] + c[0];
a[1] = b[1] + c[1];
}
```
At `-O2`, SLP vectorizers it.
`-O2 -fno-tree-vectorize` disables the SLP vectorizer
But if you did:
`-O2 -ftree-slp-vectorize -fno-tree-vectorize` the SLP vectorizer is turned on
still. This is what is definitely counter-intuitive really.
