This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
Re: [Bug rtl-optimization/49807] Missed byte (subreg) extraction when storing to volatile mem
- From: Andrew Pinski <pinskia at gmail dot com>
- To: "gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 21 Jul 2011 13:38:43 -0700
- Subject: Re: [Bug rtl-optimization/49807] Missed byte (subreg) extraction when storing to volatile mem
- References: <bug-49807-4@http.gcc.gnu.org/bugzilla/> <bug-49807-4-iZ1u2HBiFb@http.gcc.gnu.org/bugzilla/>
On Thu, Jul 21, 2011 at 1:34 PM, gjl at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
> I don't know the exact rationale why volatile_ok is false in combine.
> It' obviously about volatile correctnet, but I don't see what would break here.
It can, when dealing optimizations that reduce the size of load/stores
of volatile memory.
Thanks,
Andrew Pinski