SIMD auto-vectorization in hotspot

[Vitaly Davidovich]

Hi guys,

Does the -XX:+UseSuperWord (I see it's set to true on 6u23) optimization
enable auto-vectorization of certain loops? If so, are there any switches
that can be turned on (in product VM) to see if vectorization is being
applied or not? In general, would someone be able to describe the current
state of loop vectorization (i.e. implementation limits, restrictions,
etc)? Which ISAs are supported (i.e. SSE, AVX)? Any other info on this
subject would be greatly appreciated ...

Thanks very much,

Vitaly
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