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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/99259] aarch64 inline asm: miscompilation depending on function parameters order
Date: Wed, 24 Feb 2021 20:46:57 +0000	[thread overview]
Message-ID: <bug-99259-4-puU4Un9y0D@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-99259-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99259

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
v0 wasn't used for x and y, but for acc and x.  As you said, when acc is both
input and output, you need +w or "=w" (acc) ..... "0" (acc), but even if it was
output only and couldn't clash with x or y, you'd need early-clobber - "=&w"
which would make sure that the input operands get different registers from that
output one.

  parent reply	other threads:[~2021-02-24 20:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-24 19:59 [Bug inline-asm/99259] New: " jacob.benoit.1 at gmail dot com
2021-02-24 20:01 ` [Bug inline-asm/99259] " jacob.benoit.1 at gmail dot com
2021-02-24 20:46 ` jakub at gcc dot gnu.org [this message]
2021-02-25 17:19 ` jacob.benoit.1 at gmail dot com

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