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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/102793] AArch64: sequential comparisons with equal conditional blocks don't use ccmp
Date: Sat, 26 Aug 2023 07:27:07 +0000 [thread overview]
Message-ID: <bug-102793-4-JaYPqr6Da5@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-102793-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102793
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> basically ccmp expension is just ifcombine really.
> That is:
> cc = bar cmp 0
> cc = cc.eq ? ne : d1 cmp d2
> cset cc.ne
> So this is why doing a late pass ifcombine might be good for aarch64; I
> don't know if how much compile time it would cost though.
Or maybe isel can do this too ...
next prev parent reply other threads:[~2023-08-26 7:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 21:07 [Bug target/102793] New: " christophm30 at gmail dot com
2021-10-15 21:10 ` [Bug tree-optimization/102793] " pinskia at gcc dot gnu.org
2021-10-15 21:19 ` pinskia at gcc dot gnu.org
2021-10-18 6:35 ` rguenth at gcc dot gnu.org
2021-10-18 6:43 ` pinskia at gcc dot gnu.org
2023-08-26 7:27 ` pinskia at gcc dot gnu.org [this message]
2024-04-05 12:35 ` manolis.tsamis at vrull dot eu
2024-04-05 12:41 ` manolis.tsamis at vrull dot eu
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