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From: "froydnj at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/44606] Wrong SPE floating point during computation
Date: Thu, 09 Sep 2010 15:29:00 -0000 [thread overview]
Message-ID: <20100909152846.25746.qmail@sourceware.org> (raw)
In-Reply-To: <bug-44606-14399@http.gcc.gnu.org/bugzilla/>
------- Comment #7 from froydnj at gcc dot gnu dot org 2010-09-09 15:28 -------
The problem is in the register allocator. What happens is that after register
allocation, we have something like:
r27:DF = [r11:SI]
...
r27:SI = 0
...
and then the first def gets deleted because it's obviously dead code. I don't
know why the register allocator chooses r27 for the SImode pseudo.
Scheduling is necessary to trigger the bug, but it's not the problem.
--
froydnj at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |froydnj at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44606
next prev parent reply other threads:[~2010-09-09 15:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-21 9:09 [Bug tree-optimization/44606] New: " gcc at breakpoint dot cc
2010-06-21 9:10 ` [Bug tree-optimization/44606] " gcc at breakpoint dot cc
2010-06-21 9:11 ` gcc at breakpoint dot cc
2010-06-21 9:11 ` gcc at breakpoint dot cc
2010-07-16 18:48 ` [Bug target/44606] " Kyle dot D dot Moffett at boeing dot com
2010-08-31 14:04 ` Kyle dot D dot Moffett at boeing dot com
2010-08-31 14:04 ` Kyle dot D dot Moffett at boeing dot com
2010-09-09 15:29 ` froydnj at gcc dot gnu dot org [this message]
2010-09-11 15:06 ` kyle at moffetthome dot net
2010-09-22 18:50 ` wd at denx dot de
[not found] <bug-44606-4@http.gcc.gnu.org/bugzilla/>
2010-11-02 14:39 ` dvdkhlng at gmx dot de
2010-12-30 15:47 ` froydnj at gcc dot gnu.org
2011-01-21 15:37 ` dvdkhlng at gmx dot de
2011-01-31 22:16 ` froydnj at gcc dot gnu.org
2011-02-01 2:12 ` froydnj at gcc dot gnu.org
2011-02-01 2:12 ` froydnj at gcc dot gnu.org
2011-03-16 22:48 ` bernds at gcc dot gnu.org
2011-03-17 13:13 ` gcc at breakpoint dot cc
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