[Bug tree-optimization/121737] vectorizer part of the loop but not all of it

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121737

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> 
> What taget were you testing?

Just aarch64 without SVE enabled. Your dump seems to be without the if part

> 
> What do you mean by "manualy peeling"?

```
        rngx[0] = poly->v[0].x;
        rngx[1] = poly->v[0].x;
        rngy[0] = poly->v[0].y;
        rngy[1] = poly->v[0].y;

        for (int i=1; i<len; ++i)
        {
                if (poly->v[i].x < rngx[0]) rngx[0] = poly->v[i].x;
                if (poly->v[i].x > rngx[1]) rngx[1] = poly->v[i].x;
                if (poly->v[i].y < rngy[0]) rngy[0] = poly->v[i].y;
                if (poly->v[i].y > rngy[1]) rngy[1] = poly->v[i].y;
        }
```