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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/96912] Failure to optimize pblendvb pattern
Date: Thu, 03 Sep 2020 08:03:05 +0000 [thread overview]
Message-ID: <bug-96912-4-suw607uphK@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-96912-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96912
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-09-03
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
On GIMPLE this could be pattern-matched to a VEC_PERM_EXPR <> which is
how to represent blends. Of course matching this on RTL is possible as well.
The difficulty is of course the mismatch in element sizes where the
mask appears to be byte granular while the data to be blended is double-words.
next prev parent reply other threads:[~2020-09-03 8:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 7:31 [Bug tree-optimization/96912] New: Failure to optimize pattern gabravier at gmail dot com
2020-09-03 8:03 ` rguenth at gcc dot gnu.org [this message]
2020-09-03 8:03 ` [Bug tree-optimization/96912] Failure to optimize pblendvb pattern glisse at gcc dot gnu.org
2020-11-24 18:07 ` jakub at gcc dot gnu.org
2021-08-15 0:24 ` pinskia at gcc dot gnu.org
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