public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug tree-optimization/39201] [meta-bug] ivopts metabug
[not found] <bug-39201-4@http.gcc.gnu.org/bugzilla/>
@ 2013-11-19 16:37 ` bonzini at gnu dot org
0 siblings, 0 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2013-11-19 16:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39201
Bug 39201 depends on bug 39200, which changed state.
Bug 39200 Summary: ivopts slows down SciMark sparse matrix benchmark
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39200
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/39201] [meta-bug] ivopts metabug
2009-02-16 9:06 [Bug tree-optimization/39201] New: " bonzini at gnu dot org
2009-02-16 9:44 ` [Bug tree-optimization/39201] [meta-bug] " ubizjak at gmail dot com
@ 2009-02-16 9:56 ` bonzini at gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: bonzini at gnu dot org @ 2009-02-16 9:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from bonzini at gnu dot org 2009-02-16 09:56 -------
Subject: Re: [meta-bug] ivopts metabug
> I'm adding PR 34163 in the hope that ivopts pass will someday know how to
> handle x[n] = f (x[n-1]) from "... very tight loops that calculate x[n] from
> the value x[n-1], where x[n-1] is the result of a previous step."
>
> This is especially important for unrolled loops, see PR 34163, comment #8
Isn't what you want simply load PRE? That looks like a pass ordering
problem...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39201
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/39201] [meta-bug] ivopts metabug
2009-02-16 9:06 [Bug tree-optimization/39201] New: " bonzini at gnu dot org
@ 2009-02-16 9:44 ` ubizjak at gmail dot com
2009-02-16 9:56 ` bonzini at gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2009-02-16 9:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from ubizjak at gmail dot com 2009-02-16 09:44 -------
I'm adding PR 34163 in the hope that ivopts pass will someday know how to
handle x[n] = f (x[n-1]) from "... very tight loops that calculate x[n] from
the value x[n-1], where x[n-1] is the result of a previous step."
This is especially important for unrolled loops, see PR 34163, comment #8.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |34163
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39201
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-11-19 16:37 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <bug-39201-4@http.gcc.gnu.org/bugzilla/>
2013-11-19 16:37 ` [Bug tree-optimization/39201] [meta-bug] ivopts metabug bonzini at gnu dot org
2009-02-16 9:06 [Bug tree-optimization/39201] New: " bonzini at gnu dot org
2009-02-16 9:44 ` [Bug tree-optimization/39201] [meta-bug] " ubizjak at gmail dot com
2009-02-16 9:56 ` bonzini at gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).