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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/99620] Subtract with borrow (SBB) missed optimization
Date: Tue, 16 Mar 2021 16:59:52 +0000	[thread overview]
Message-ID: <bug-99620-4-cyX420pbPF@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-99620-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99620

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-linux-gnu

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This works on aarch64:
_Z8sub_good4u128S_:
.LFB0:
        .cfi_startproc
        subs    x0, x0, x2
        sbc     x1, x1, x3
        ret
.....
_Z7sub_bad4u128S_:
.LFB1:
        .cfi_startproc
        subs    x0, x0, x2
        sbc     x1, x1, x3
        ret

  parent reply	other threads:[~2021-03-16 16:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 16:53 [Bug rtl-optimization/99620] New: " chfast at gmail dot com
2021-03-16 16:57 ` [Bug target/99620] " pinskia at gcc dot gnu.org
2021-03-16 16:59 ` pinskia at gcc dot gnu.org [this message]
2021-03-17  8:11 ` rguenth at gcc dot gnu.org
2021-03-17  8:17 ` jakub at gcc dot gnu.org
2021-03-17 20:32 ` chfast at gmail dot com
2021-12-23 21:53 ` [Bug tree-optimization/99620] " pinskia at gcc dot gnu.org

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