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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/37263] [4.3/4.4 Regression] extra code for doloop with unsigned 32bit types on LP64
Date: Fri, 29 Aug 2008 04:38:00 -0000 [thread overview]
Message-ID: <20080829043723.28374.qmail@sourceware.org> (raw)
In-Reply-To: <bug-37263-6528@http.gcc.gnu.org/bugzilla/>
------- Comment #1 from pinskia at gcc dot gnu dot org 2008-08-29 04:37 -------
We can optimize this by doing either of two things:
1) change iv-opts back to produce !=
2) a) have loop-iv.c keep /s/u for the subreg
b) optimize (eq (subreg/s (reg)) (const_int 0) ) to (eq (reg) (const_int
0)).
Both will fix the issue, I can test 2 as that is easy to implement and I
already have it done, I just need to test it fully.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |pinskia at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-08-29 04:37:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37263
next prev parent reply other threads:[~2008-08-29 4:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-28 2:20 [Bug rtl-optimization/37263] New: " pinskia at gcc dot gnu dot org
2008-08-28 2:20 ` [Bug rtl-optimization/37263] " pinskia at gcc dot gnu dot org
2008-08-29 4:38 ` pinskia at gcc dot gnu dot org [this message]
2008-09-03 19:32 ` pinskia at gcc dot gnu dot org
2008-09-09 20:27 ` jsm28 at gcc dot gnu dot org
2008-09-15 21:26 ` pinskia at gcc dot gnu dot org
2008-09-15 21:27 ` pinskia at gcc dot gnu dot org
2008-09-16 16:23 ` [Bug rtl-optimization/37263] [4.3 " pinskia at gcc dot gnu dot org
2008-09-16 16:24 ` pinskia at gcc dot gnu dot org
2008-11-20 1:00 ` cnstar9988 at gmail dot com
2009-01-24 10:27 ` rguenth at gcc dot gnu dot org
2009-04-16 15:43 ` pinskia at gcc dot gnu dot org
2009-08-04 12:42 ` rguenth at gcc dot gnu dot org
2010-05-22 18:26 ` rguenth at gcc dot gnu dot org
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