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From: "michael at talamasca dot ocis.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/52734] Incorrect optimization of uClibc sbrk()
Date: Tue, 27 Mar 2012 08:10:00 -0000	[thread overview]
Message-ID: <bug-52734-4-YGmDzb25QC@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52734-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52734

--- Comment #6 from michael at talamasca dot ocis.net <michael at talamasca dot ocis.net> 2012-03-27 08:05:06 UTC ---
Created attachment 27011
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27011
Assembly output of Mikael's testcase, from Michael's computer

Here's the assembly output you requested.  The "-v" data is in the typescript
file added separately.

I've used the modified version of the case submitted by Mikael, rather than my
original file.

Notice that "bbb" appears in the assembly only twice.  The first time is the
increment in Mikael's aaa implementation, and the second is on a code path that
goes straight to the end of the function.  Nowhere in the code is the load of
ddd from bbb.


  parent reply	other threads:[~2012-03-27  8:05 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-27  5:32 [Bug c/52734] New: " michael at talamasca dot ocis.net
2012-03-27  7:43 ` [Bug c/52734] " rguenth at gcc dot gnu.org
2012-03-27  7:44 ` mikpe at it dot uu.se
2012-03-27  7:54 ` mikpe at it dot uu.se
2012-03-27  7:57 ` mikpe at it dot uu.se
2012-03-27  8:01 ` michael at talamasca dot ocis.net
2012-03-27  8:10 ` michael at talamasca dot ocis.net [this message]
2012-03-27  8:38 ` [Bug rtl-optimization/52734] [4.7/4.8 Regression] " rguenth at gcc dot gnu.org
2012-03-27  9:39 ` [Bug tree-optimization/52734] " rguenth at gcc dot gnu.org
2012-03-27 13:08 ` vries at gcc dot gnu.org
2012-03-27 13:29 ` vries at gcc dot gnu.org
2012-03-27 17:10 ` vries at gcc dot gnu.org
2012-04-10 22:42 ` joerg.jungermann at gmx dot de
2012-04-10 22:58 ` sedat.dilek at gmail dot com
2012-04-11 10:13 ` rguenth at gcc dot gnu.org
2012-04-12 16:26 ` vries at gcc dot gnu.org
2012-04-13 13:19 ` rguenth at gcc dot gnu.org
2012-04-13 19:33 ` vries at gcc dot gnu.org
2012-04-13 19:39 ` sedat.dilek at gmail dot com
2014-02-16 13:16 ` jackie.rosen at hushmail dot com

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