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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/24021] VRP does not work with floating points
Date: Wed, 09 Feb 2022 17:29:37 +0000	[thread overview]
Message-ID: <bug-24021-4-RHe0CGRyui@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-24021-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24021

--- Comment #9 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Aldy Hernandez from comment #6)
> As I've mentioned, I'm hoping some floating expert can take this across to
> goal line, as my head will start spinning as soon as we start talking about
> NANs and such.  The range-op work will likely require floating specialized
> knowledge.

Subnormals might also need to be considered as special cases: "Whether and in
what cases subnormal numbers are treated as zeros is implementation defined."
will be added to C23 (some behaviors are dictated by the hardware, e.g. ARM in
some non-IEEE configurations), but I've asked for clarification in the CFP
mailing-list.

  parent reply	other threads:[~2022-02-09 17:29 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-24021-4@http.gcc.gnu.org/bugzilla/>
2021-08-25 20:29 ` amacleod at redhat dot com
2022-02-07 16:07 ` aldyh at gcc dot gnu.org
2022-02-09 16:35 ` aldyh at gcc dot gnu.org
2022-02-09 17:04 ` law at gcc dot gnu.org
2022-02-09 17:27 ` aldyh at gcc dot gnu.org
2022-02-09 17:29 ` vincent-gcc at vinc17 dot net [this message]
2022-02-09 17:31 ` vincent-gcc at vinc17 dot net
2022-02-09 18:30 ` jakub at gcc dot gnu.org
2022-02-09 18:31 ` amacleod at redhat dot com
2022-02-09 18:35 ` amacleod at redhat dot com
2022-02-09 19:05 ` vincent-gcc at vinc17 dot net
2022-02-10  9:33 ` rguenth at gcc dot gnu.org
2022-02-10 12:02 ` jakub at gcc dot gnu.org
2022-02-10 12:21 ` rguenther at suse dot de
2022-02-10 14:17 ` vincent-gcc at vinc17 dot net
2022-04-05 19:34 ` amacleod at redhat dot com
2022-04-06  9:34 ` aldyh at gcc dot gnu.org
2022-04-06  9:46 ` jakub at gcc dot gnu.org
2022-04-06  9:57 ` aldyh at gcc dot gnu.org
2022-04-06 10:30 ` aldyh at gcc dot gnu.org
2022-04-06 10:47 ` jakub at gcc dot gnu.org
2022-08-01 13:27 ` aldyh at gcc dot gnu.org
2022-08-01 14:30 ` aldyh at gcc dot gnu.org
2022-11-08 15:54 ` cvs-commit at gcc dot gnu.org
2022-11-08 15:57 ` aldyh at gcc dot gnu.org
2022-11-28 22:15 ` pinskia at gcc dot gnu.org
     [not found] <bug-24021-6528@http.gcc.gnu.org/bugzilla/>
2005-10-23 23:43 ` pinskia at gcc dot gnu dot org

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