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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/95960] GCC should re-vectorize vector code
 with larger VF
Date: Fri, 26 Jan 2024 05:55:28 +0000
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X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95960

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-01-26
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Even V2SF -> V4SF would be useful for aarch64:
```
typedef float __attribute__((vector_size(8))) v2sf;
float a[4];
float b[4];
void f()
{
  *(v2sf *)&b[0] +=3D *(v2sf *)&a[0];
  *(v2sf *)&b[2] +=3D *(v2sf *)&a[2];
}

```=