[vector] binary operations with a scalar

[Paul Sandoz]

> On Feb 21, 2018, at 11:40 AM, Paul Sandoz <Paul.Sandoz at oracle.com> wrote:
>> 
>> Yes, there's only a single Int256Vector::species() (Int256Vector is a leaf class), but IntVector::species() has many overloads. Depending on compilation context (and profile data), it can be hard to devirtualize (and then inline) the call.
>> 
> 
> Ok. thanks, i’ll do this and we can adjust as appropriate if necessary based on performance analysis.
> 

Done.

Paul.