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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/57908] alignment of arrays allocated stack on amd64/x86_64: 16 bytes ?
Date: Tue, 16 Jul 2013 15:06:00 -0000	[thread overview]
Message-ID: <bug-57908-4-cCg8T4NIeu@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-57908-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57908

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-linux-gnu
             Status|UNCONFIRMED                 |RESOLVED
          Component|c                           |target
         Resolution|---                         |INVALID

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> As I understand the ABI specifications, arrays allocated on stack must be
> aligned on 16 bytes boundaries, whatever its length is

HUH?  I don't read it that way.  I read if the length is less than 16 bytes
then it is same alignment as its elements; otherwise it is 16byte aligned.

It does require VLAs to have 16byte alignment though.


  parent reply	other threads:[~2013-07-16 15:06 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-16 14:35 [Bug c/57908] New: " yann at droneaud dot fr
2013-07-16 14:39 ` [Bug c/57908] " yann at droneaud dot fr
2013-07-16 15:03 ` pinskia at gcc dot gnu.org
2013-07-16 15:06 ` pinskia at gcc dot gnu.org [this message]
2013-07-16 15:11 ` [Bug target/57908] " yann at droneaud dot fr
2013-07-16 15:18 ` yann at droneaud dot fr
2013-07-16 15:20 ` yann at droneaud dot fr
2013-07-16 15:28 ` pinskia at gcc dot gnu.org
2013-07-16 15:32 ` yann at droneaud dot fr
2013-07-16 15:36 ` pinskia at gcc dot gnu.org
2013-07-16 15:56 ` yann at droneaud dot fr

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