Auto-Vectorization and array/vector operations

[jmh530 via Digitalmars-d]

On Wednesday, 15 July 2015 at 22:42:05 UTC, Steven wrote:
> I was trying to show someone how awesome Dlang was earlier, and 
> how the vector operations are expected to take advantage of the 
> CPU vector instructions, and was dumbstruck when dmd and gdc 
> both failed to auto-vectorize a simple case.  I've stripped it 
> down to the bare minimum and loaded the example on the 
> interactive compiler:

I'm not sure how the compilers handle auto-vectorization, but I 
found
http://dconf.org/2013/talks/evans_2.html
informative. It recommends not casting between float and simd 
types.