symbol "cl_intel_subgroups" defined for the plain CPU target device

[allanmac1]

The symbol "cl_intel_subgroups" is defined for the CPU target device.

It shouldn't be.

Drivers:

• CPU: Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz / 7.2.0.10
• GPU: HD 530 / 22.20.16.4729

Kernel attached.

[Jeffrey_M_Intel1]

Thanks for this report.  I agree this does not seem right.  I'm investigating and will get back to you in a day or two.

[allanmac1]

Here is a temporary workaround that will squelch this error on Intel CL 2.0 CPU compilers while supporting a CL1.2 GPU target like Apollo Lake:

#if (__OPENCL_VERSION__ == CL_VERSION_1_2) && defined ( cl_intel_subgroups ) || defined ( cl_khr_subgroups )

[Jeffrey_M_Intel1]

Sorry for the delayed reply.  Glad you've found a workaround.  

I've replicated your report with the 4729 driver, and a bug report is filed.  As I've investigated, I've found some strange (but unrelated) behavior with this driver and Intel(R) SDK for OpenCL(tm) Applications 2016 R3 too.  The 4729 driver build is from the new 15.46 branch.  

Until the next SDK release you may have better results on the 15.45 driver branch.  I tested with the latest 15.45 release, 15.45.19.4678, and was not able to replicate the behavior you've described.  

[allanmac1]

Jeffrey -- thanks for digging into the situation!

I'll revert back to .4678 if it becomes a problem... meanwhile, I'm looking forward to the next SDK. :)