From: Jakub Jelinek <jakub@redhat.com>
To: Richard Biener <rguenther@suse.de>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Fix vect-simd-clone testcase dump scanning
Date: Fri, 14 Apr 2023 12:25:05 +0200 [thread overview]
Message-ID: <ZDkqAbHL4o6lNiHG@tucnak> (raw)
In-Reply-To: <nycvar.YFH.7.77.849.2304141012340.4466@jbgna.fhfr.qr>
On Fri, Apr 14, 2023 at 10:15:06AM +0000, Richard Biener wrote:
> Oops. Indeed target_avx checks whether it can compile sth with
> -O2 -mavx rather than verifying avx is present. I've seen scan
> failures with -m32/-march=cascadelake on a zen2 host. I'm not exactly
> sure why.
That is strange. Sure, -march=cascadelake implies -mavx (-mavx512f even),
but it would surprise me if on such a host avx_runtime wasn't true.
But we've been there before, I think cascadelake turns on the vector
epilogues.
In r13-6784 I've added --param vect-epilogues-nomask=0 to some testcases
that were affected at that point, but perhaps something is affected since
then. Will have a look.
Jakub
next prev parent reply other threads:[~2023-04-14 10:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-14 9:42 Richard Biener
2023-04-14 9:50 ` Jakub Jelinek
2023-04-14 10:15 ` Richard Biener
2023-04-14 10:25 ` Jakub Jelinek [this message]
2023-04-14 10:59 ` Andre Vieira (lists)
2023-04-14 11:00 ` Jakub Jelinek
2023-04-14 13:38 ` Andre Vieira (lists)
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