opencl build program error on Intel 630 graphics

Hi,

Please help on this opencl issue:

I have a kernel program file that runs fine on AMD and NVidia graphics cards, as well as on Intel CPUs. But when trying to build on Intel 630 graphics card, I got the following message:

error: undefined reference to `_Z5clampDv2_ddd()'

error: backend compiler failed build.

I am pretty sure this is related to calls to clamp(double2, double,double).

when I change the above call to clamp(double, double, double) and try to build the kernels again, the program simply clashes (from igc64.dll) and no exception can be caught to investigate the cause of the crash.

Any insight into this issue is welcome and is greatly appreciated.

Thanks,