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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/54192] New: -fno-trapping-math by default?
Date: Tue, 07 Aug 2012 12:40:00 -0000	[thread overview]
Message-ID: <bug-54192-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54192

             Bug #: 54192
           Summary: -fno-trapping-math by default?
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: glisse@gcc.gnu.org


Hello,

I am not sure about the "component" (I am actually more interested in the C++
behavior, but I assume C and C++ will remain the same), or about posting this
to bugzilla instead of the mailing-list.

I would like to know people's opinion about making -fno-trapping-math the
default. One strong argument in favor is that -fno-rounding-math is the
default. The 2 options are quite similar. They both affect "special" use of
maths, they both inhibit a number of optimizations, and they both have bugs
(not trying to offend anyone here, it is already great that the options are as
far as they are).

As someone who needs -frounding-math and for whom -fno-trapping-math is safe
and helps performance, you can see why I'd like to change it ;-)


             reply	other threads:[~2012-08-07 12:40 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-07 12:40 glisse at gcc dot gnu.org [this message]
2012-08-07 12:50 ` [Bug c/54192] " rguenth at gcc dot gnu.org
2012-08-07 13:14 ` glisse at gcc dot gnu.org
2021-09-21  0:51 ` gabravier at gmail dot com
2021-09-21  6:36 ` rguenther at suse dot de
2021-09-21  7:48 ` ebotcazou at gcc dot gnu.org
2021-09-21 20:00 ` joseph at codesourcery dot com
2021-09-22  6:20 ` rguenther at suse dot de
2023-08-09 10:45 ` rguenth at gcc dot gnu.org
2023-08-09 10:50 ` rguenth at gcc dot gnu.org

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