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Subject: Re: [PATCH] TRACING: Fix a copmile warning
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>
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Date: Mon, 25 Jul 2011 21:12:46 -0400
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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