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List:       openjdk-core-libs-dev
Subject:    Re: ByteBuffer.wrap(array).getInt(offset)
From:       Florian Weimer <fweimer () redhat ! com>
Date:       2015-01-30 13:50:38
Message-ID: 54CB8C2E.1070108 () redhat ! com
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On 08/20/2014 06:43 PM, Andrew Haley wrote:
> On 08/20/2014 04:10 PM, Florian Weimer wrote:
>> Is there already a way to compute the expression in the subject without 
>> the ByteBuffer allocation?  I saw quite a few equivalent formulations in 
>> the OpenJDK sources, and perhaps it's time to add a standardized 
>> solution.
> 
> Isn't this really calling for intrinsification of ByteBuffers?  With that,
> C2 would know that the ByteBuffer doesn't escape, and could collapse the
> lot into a load.

It's a lot of heavy machinery for something that should be quite simple.
 I also expect quite a few users during VM startup.

-- 
Florian Weimer / Red Hat Product Security
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