Re: [Qemu-devel] x86 AREG0 patches

[Blue Swirl]

On Mon, May 14, 2012 at 10:10 AM, 陳韋任 <address@hidden> wrote:
> On Sun, May 13, 2012 at 09:04:39PM +0000, Blue Swirl wrote:
>> Hi,
>>
>> A preview of x86 AREG0 patches can be found at the usual place:
>> URL   git://repo.or.cz/qemu/blueswirl.git
>>       http://repo.or.cz/r/qemu/blueswirl.git
>>
>> This is obviously 1.2 material.
>
>  Is this patch will remove AREG0 so that we can use clang to compile QEMU?

That should be possible eventually. I have only used clang analyzer,
not the compiler. Besides AREG0 (register variables), other GCC
extensions like variable length arrays need fixing but that should be
trivial.

> How much the performance lose?

 Probably less than 10%. Repeatable performance tests would be nice.

>
> Regards,
> chenwj
>
> --
> Wei-Ren Chen (陳韋任)
> Computer Systems Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
> Homepage: http://people.cs.nctu.edu.tw/~chenwj