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From: "570070308 at qq dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/104805] [12.0] x86_64 Extended asm may use rbp register to input/output even thougth "rbp" is in the clobber list when "rsp" and "rbp" are both in the in the clobber list
Date: Sun, 06 Mar 2022 12:09:15 +0000	[thread overview]
Message-ID: <bug-104805-4-DyQq3Kkk3r@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-104805-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104805

--- Comment #3 from 。 <570070308 at qq dot com> ---
(In reply to Jakub Jelinek from comment #1)
> Clobber of "rsp" makes no sense, you can't change the value of the stack
> pointer in inline asm without restoring it back before the end of inline asm.

And, this bug is about "rbp" not "rsp". GCC uses "rbp" to represent input
operand even though the "rbp" is in the clobber list.

  parent reply	other threads:[~2022-03-06 12:09 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-06 11:43 [Bug c/104805] New: " 570070308 at qq dot com
2022-03-06 11:46 ` [Bug c/104805] " jakub at gcc dot gnu.org
2022-03-06 11:51 ` 570070308 at qq dot com
2022-03-06 12:09 ` 570070308 at qq dot com [this message]
2022-03-06 13:03 ` jakub at gcc dot gnu.org
2022-03-06 13:22 ` 570070308 at qq dot com
2022-03-06 19:47 ` pinskia at gcc dot gnu.org

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