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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/22326] promotions (from float to double) are not removed when they should be able to
Date: Wed, 18 Nov 2020 15:22:50 +0000 [thread overview]
Message-ID: <bug-22326-4-TLTIWBoeAP@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-22326-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22326
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The fmadd;frsp sequence is correct for this source code. It does double
rounding of the result (first to DP float, then to SP float), so using
just fmadds is only correct for -ffast-math or similar.
next prev parent reply other threads:[~2020-11-18 15:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-22326-4@http.gcc.gnu.org/bugzilla/>
2020-11-17 7:07 ` luoxhu at gcc dot gnu.org
2020-11-17 7:10 ` luoxhu at gcc dot gnu.org
2020-11-17 10:21 ` pinskia at gcc dot gnu.org
2020-11-17 21:56 ` joseph at codesourcery dot com
2020-11-18 15:22 ` segher at gcc dot gnu.org [this message]
2020-11-23 8:39 ` luoxhu at gcc dot gnu.org
2020-11-23 8:44 ` luoxhu at gcc dot gnu.org
2020-11-23 12:09 ` rguenther at suse dot de
2020-11-24 10:00 ` rsandifo at gcc dot gnu.org
2020-11-27 6:20 ` luoxhu at gcc dot gnu.org
2020-11-27 6:27 ` luoxhu at gcc dot gnu.org
2020-11-27 7:12 ` rguenther at suse dot de
2020-11-27 9:24 ` rsandifo at gcc dot gnu.org
2020-11-30 8:31 ` luoxhu at gcc dot gnu.org
2020-12-11 13:49 ` segher at gcc dot gnu.org
2020-12-11 14:24 ` rguenth at gcc dot gnu.org
2020-12-11 17:51 ` segher at gcc dot gnu.org
2020-12-11 19:24 ` rguenther at suse dot de
2020-12-14 7:21 ` luoxhu at gcc dot gnu.org
[not found] <bug-22326-6528@http.gcc.gnu.org/bugzilla/>
2006-08-21 6:08 ` pinskia at gcc dot gnu dot org
2007-07-09 6:08 ` pinskia at gcc dot gnu dot org
2005-07-06 15:40 [Bug tree-optimization/22326] New: " pinskia at gcc dot gnu dot org
2005-07-12 20:37 ` [Bug tree-optimization/22326] " pinskia at gcc dot gnu dot org
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