From: Steven Rostedt <rostedt@goodmis.org>
To: Arnaud Lacombe <lacombar@gmail.com>
Cc: Ian Lance Taylor <iant@google.com>,
gcc-help@gcc.gnu.org, stufever@gmail.com,
linux-kernel@vger.kernel.org,
Wang Shaoyan <wangshaoyan.pt@taobao.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>
Subject: Re: [PATCH] TRACING: Fix a copmile warning
Date: Mon, 25 Jul 2011 21:12:46 -0400 [thread overview]
Message-ID: <1311642766.3526.60.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <CACqU3MXuMDz46rM9p_7iBeK1G0T-DH=52KHj9ygc42j=qQmP4g@mail.gmail.com>
On Mon, 2011-07-25 at 21:08 -0400, Arnaud Lacombe wrote:
> Hi,
>
> but the code generated seem to test %esi (`b', potentially
> uninitialized) before %ebx (`a'). Am I still missing something ?
But it tests 'a' again afterward. If 'a' is 0, it doesn't matter what
'b' was. So the uninitialized test is a wash. No harm done, except for
some wasted CPU cycles.
-- Steve
next prev parent reply other threads:[~2011-07-26 1:12 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-18 9:40 stufever
2011-07-25 18:32 ` Steven Rostedt
2011-07-25 19:43 ` Arnaud Lacombe
2011-07-25 20:19 ` Steven Rostedt
2011-07-25 20:28 ` Arnaud Lacombe
2011-07-25 22:38 ` Arnaud Lacombe
2011-07-25 23:49 ` Steven Rostedt
2011-07-25 23:52 ` Arnaud Lacombe
2011-07-26 0:14 ` Steven Rostedt
2011-07-25 23:50 ` Arnaud Lacombe
2011-07-25 23:58 ` Arnaud Lacombe
2011-07-26 0:08 ` Steven Rostedt
2011-07-26 0:35 ` Steven Rostedt
2011-07-26 0:44 ` Ian Lance Taylor
2011-07-26 0:41 ` Ian Lance Taylor
2011-07-26 1:08 ` Arnaud Lacombe
2011-07-26 1:12 ` Steven Rostedt [this message]
2011-07-26 1:19 ` Arnaud Lacombe
2011-07-26 20:43 ` Jeff Law
2011-07-26 1:10 ` Steven Rostedt
2011-07-26 5:55 ` Ian Lance Taylor
2011-07-26 12:00 ` Paulo Marques
2011-07-26 13:18 ` Jesper Juhl
2011-07-26 13:32 ` Paulo Marques
2011-07-26 13:55 ` Steven Rostedt
-- strict thread matches above, loose matches on Subject: below --
2011-07-18 9:35 stufever
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