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Re: [Qemu-devel] [PATCH v5 09/19] tcg-arm: Implement deposit for armv7
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From: |
Aurelien Jarno |
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Subject: |
Re: [Qemu-devel] [PATCH v5 09/19] tcg-arm: Implement deposit for armv7 |
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Date: |
Mon, 22 Apr 2013 11:08:55 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sun, Apr 21, 2013 at 05:58:33PM +0100, Richard Henderson wrote:
> On 2013-04-21 11:35, Aurelien Jarno wrote:
> >Wouldn't it be better to only declare the zero constraint (using bfc in
> >that case), and let the middle-end to load the constant in other cases?
>
> Possibly. I wondered if the work of the extra constraint was worth
> the effort.
I am not sure it would make the patch that much bigger. And it would
prevent a constant to be reloaded twice, provided we fix/improve the
constant propagation to avoid this.
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net