Beignet Worksize trial-and-error bug

[sjkelly]

On beignet with HD620 gpu:

Beignet: "unable to find good values for local_work_size[i], please provide\n" " local_work_size[] explicitly, you can find good values with\n" " trial-and-error method."

test/example001.jl will trigger this.

This is not an issue on Beignet on Sandy Bridge, presumably because it uses OpenCL -> SIMD.

[sjkelly]

It seems like the "everything inline" approach is pressuring registers. Separating the primitive distance fields into different kernels might fix this: https://stackoverflow.com/questions/9504828/write-multiple-kernels-or-a-single-kernel

[sjkelly]

no longer using opencl