Should we compile x86-64 ld.so with -mno-sse -mno-sse?

[Andreas Jaeger]

On 11/01/2012 12:18 AM, H.J. Lu wrote:
> On Wed, Oct 31, 2012 at 3:59 PM, Richard Henderson <rth@twiddle.net> wrote:
>> On 2012-11-01 03:10, Carlos O'Donell wrote:
>>> What use case is there for not wanting to touch SEE in ld.so?
>>
>> I can only imagine HJL is worried about AVX performance if the
>> dynamic linker uses SSE insns.
>>
>
> That is not the main reason.  We make sure that ld.so string/memory
> functions never touch SSE/AVX registers.  It is not for performance,
> but for correctness.  Otherwise callee will get random values in
> vector registers,

And as you mention elsewhere, we test already for it - so  is that test 
failing now for you? Under which condition?

Andreas
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