linux-kernel - Re: [PATCH 46/74] x86, lto: Disable fancy hweight optimizations for LTO

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Date:	Mon, 20 Aug 2012 13:38:17 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Andi Kleen" <ak@...ux.intel.com>
Cc:	"Andi Kleen" <andi@...stfloor.org>, <x86@...nel.org>,
	<akpm@...ux-foundation.org>, <mmarek@...e.cz>,
	<linux-kbuild@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 46/74] x86, lto: Disable fancy hweight
 optimizations for LTO

>>> On 20.08.12 at 13:18, Andi Kleen <ak@...ux.intel.com> wrote:
>>  That's not the point: The point really is that you could allow the
>> alternative regardless of LTO, and just penalize the LTO case
>> by having even the asm clobber the registers that a function call
>> would not preserve.
> 
> That's just what a normal call does, right?

Exactly.

Jan

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