On Sun, 16 Jun 2013, Jason Garrett-Glaser wrote:

>> +    movsd   m0, [varq]
>> +    movhpd  m0, [varq+8]
>
> movu isn't faster or at least the same?  I'd think it'd be better on
> Haswell at least, but I'm surprised it hurts on Sandy Bridge (if it
> does?)

movu can store-forwarding stall, since the parent function initializes
that array with scalar ops.

--Loren Merritt
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