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From: "jakub at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/40667] [4.4/4.5 Regression] stack frames are generated even with -fomit-frame-pointer
Date: Thu, 23 Jul 2009 11:36:00 -0000 [thread overview]
Message-ID: <20090723113626.14827.qmail@sourceware.org> (raw)
In-Reply-To: <bug-40667-1600@http.gcc.gnu.org/bugzilla/>
------- Comment #17 from jakub at gcc dot gnu dot org 2009-07-23 11:36 -------
Incorrect? Why do you think so?
double on ix86 has 8 byte alignment, and unlike long long it has also
performance effects when you misalign it (in theory, we could handle double the
same as long long with -Os though). When gcc needs to decide whether to align
the stack or not, it doesn't yet know whether any temporaries of that type will
need to be spilled to stack. -mpreferred-stack-boundary=2 is typically only
used in the kernel anyway and that one doesn't have floating point stuff, as
this option affects the Linux ABI (you can't call libc functions from code
compiled that way among other things).
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40667
next prev parent reply other threads:[~2009-07-23 11:36 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-07 2:25 [Bug regression/40667] New: Performance regression: " mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-07 9:07 ` [Bug regression/40667] " rguenth at gcc dot gnu dot org
2009-07-07 14:41 ` hjl dot tools at gmail dot com
2009-07-07 16:48 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-09 9:05 ` [Bug rtl-optimization/40667] [4.4/4.5 Regression] " ubizjak at gmail dot com
2009-07-09 9:20 ` ubizjak at gmail dot com
2009-07-09 11:45 ` jakub at gcc dot gnu dot org
2009-07-09 12:05 ` jakub at gcc dot gnu dot org
2009-07-09 12:56 ` jakub at gcc dot gnu dot org
2009-07-09 13:25 ` jakub at gcc dot gnu dot org
2009-07-09 13:58 ` hjl dot tools at gmail dot com
2009-07-09 15:49 ` rguenth at gcc dot gnu dot org
2009-07-09 16:24 ` jakub at gcc dot gnu dot org
2009-07-09 16:35 ` hjl dot tools at gmail dot com
2009-07-11 17:40 ` jakub at gcc dot gnu dot org
2009-07-11 19:06 ` jakub at gcc dot gnu dot org
2009-07-11 19:07 ` jakub at gcc dot gnu dot org
2009-07-23 11:13 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 11:18 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 11:36 ` jakub at gcc dot gnu dot org [this message]
2009-07-23 12:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 12:34 ` jakub at gcc dot gnu dot org
2009-07-23 13:28 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-08 10:41 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-08 11:45 ` hjl dot tools at gmail dot com
2009-08-08 14:15 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-11 21:01 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2010-02-15 4:23 ` [Bug target/40667] " pinskia at gcc dot gnu dot org
2010-02-15 10:34 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2010-06-29 21:17 ` [Bug target/40667] [4.4/4.5/4.6 " pinskia at gcc dot gnu dot org
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