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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/57736] [4.8/4.9 Regression] ICE in emit_move_insn with __builtin_ia32_rdtsc
Date: Thu, 27 Jun 2013 19:22:00 -0000	[thread overview]
Message-ID: <bug-57736-4-pafKWghmOK@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-57736-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57736

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2013-06-27
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 30397
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30397&action=edit
gcc49-pr57736.patch

Untested fix.  If target == NULL and mode == VOIDmode, then this is a return
value ignored call.  Some of the calls like __builtin_nanq etc. are const and
thus will be optimized away even at -O0 when lhs is missing, but as rdtsc{,p}
and rdpmc aren't const/pure, they are kept.


  parent reply	other threads:[~2013-06-27 19:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-27 17:11 [Bug target/57736] New: " amonakov at gcc dot gnu.org
2013-06-27 17:13 ` [Bug target/57736] " amonakov at gcc dot gnu.org
2013-06-27 19:20 ` jakub at gcc dot gnu.org
2013-06-27 19:22 ` jakub at gcc dot gnu.org [this message]
2013-06-28 20:27 ` jakub at gcc dot gnu.org

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