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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/35226] Induction with multiplication are not vectorized
Date: Mon, 18 Mar 2024 07:29:39 +0000 [thread overview]
Message-ID: <bug-35226-4-JbNdbFoJBS@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-35226-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35226
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Alan Lawrence from comment #1)
> Multiplication reductions are supported, certainly in gcc 4.9, I think
> longer. However, the following induction does not vectorize on gcc 6
> development branch (x86_64, -O3, with or without -mavx or -msse2):
That in turn was fixed in GCC 13 (or rather it was PR 103144 ).
For reduction:
```
int a[1024];
int
f (void)
{
int p = 1;
for (int i = 0; i < 1024; i++, p*=2)
p *= a[i];
return p;
}
```
That was fixed in GCC 8 (I can't find the patch currectly).
So closing as fixed.
prev parent reply other threads:[~2024-03-18 7:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-35226-4@http.gcc.gnu.org/bugzilla/>
2015-04-30 11:28 ` alalaw01 at gcc dot gnu.org
2024-03-18 7:14 ` pinskia at gcc dot gnu.org
2024-03-18 7:29 ` pinskia at gcc dot gnu.org [this message]
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