https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #11 from Uroš Bizjak ---
(In reply to rguent...@suse.de from comment #8)
> Sure. Another option would be to enhance STV even further
> (or add some peephole patterns - combine runs before STV2) to
> transform the
>
> psubd
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
Hongyu Wang changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #9 from liuhongt at gcc dot gnu.org ---
Author: liuhongt
Date: Tue Dec 17 01:50:35 2019
New Revision: 279452
URL: https://gcc.gnu.org/viewcvs?rev=279452&root=gcc&view=rev
Log:
Add abs pattern to handle {si,di} mode abs to avoid pmax/c
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #8 from rguenther at suse dot de ---
On Tue, 26 Nov 2019, wwwhhhyyy333 at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
>
> --- Comment #7 from Hongyu Wang ---
> (In reply to rguent...@suse.de from comme
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #7 from Hongyu Wang ---
(In reply to rguent...@suse.de from comment #6)
> On Tue, 26 Nov 2019, wwwhhhyyy333 at gmail dot com wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
> >
> > --- Comment #4 from Hongyu Wang --
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #6 from rguenther at suse dot de ---
On Tue, 26 Nov 2019, wwwhhhyyy333 at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
>
> --- Comment #4 from Hongyu Wang ---
> (In reply to Richard Biener from comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #5 from Hongyu Wang ---
(In reply to Jakub Jelinek from comment #3)
> Do you mean r274481 rather than r277481, right?
Yes. Thanks for your correction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #4 from Hongyu Wang ---
(In reply to Richard Biener from comment #2)
> Btw, which variant is actually the fastest for you? abs expansion doesn't
> do any cost comparison but just uses direct abs, max and then the xor with
> shift as
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
--- Comment #2 from Richard Biener ---
Btw, which variant is actually the fastest for you? abs expansion doesn't
do any cost comparison but just uses direct abs, max and then the xor with
shift as third option (and after that fall back to compa
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92651
Richard Biener changed:
What|Removed |Added
Keywords||missed-optimization
CC|
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