From: Jonathan Nieder <jrnieder@gmail.com>
Date: Tue, 21 Jun 2011 05:00:03 GMT
Subject: Re: [PATCH 2/3] Add a lot of dummy returns to avoid warnings with NO_NORETURN
Message-ID: <20110621050003.GB16763@elie>
In-Reply-To: <20110621002448.GB700@alboin.amr.corp.intel.com>

Andi Kleen wrote:

> For some optimizations (basic block reordering) you could get
> the same benefit with __builtin_expect.
>
> But based on my own experience with __builtin_expect in other projects
> I strongly recommend to not use it manually:
[...]
> In addition there are various optimizations in gcc where I am not
> aware of a manual annotation possibility (like register allocation). 
> The data from profile feedback is used in quite a lot of places all
> over the compiler.

Thanks.  Alas.