Hi,

I am running beignet-1.3.2-lp151.5.2.x86_64 and
clpeak-1.0+git.20170625-lp151.2.4.x86_64 on openSUSE Leap 15.1 and see the
following issue on Intel(R) HD Graphics IvyBridge GT1 and Intel(R) HD Graphics
Haswell GT2 Desktop hardware.

Beignet always announces the half-precision floating point support in an OpenCL
shader code, so 

#if defined(cl_khr_fp16)

is always evaluated to the true.

However, fp16 is not supported on the some hardware like GT1 or GT2 which leads
to the crashes like the following with clpeak:

Platform: Intel Gen OCL Driver
  Device: Intel(R) HD Graphics IvyBridge GT1
    Driver version  : 1.3 (Linux x64)
    Compute units   : 6
    Clock frequency : 1000 MHz
ASSERTION FAILED: sel.hasHalfType()
  at file
/home/abuild/rpmbuild/BUILD/Beignet-1.3.2-Source/backend/src/backend/gen_insn_selection.cpp,
function void
gbe::ConvertInstructionPattern::convert32bitsToSmall(gbe::Selection::Opaque&,
const gbe::ir::ConvertInstruction&, bool&) const, line 5841
fish: './clpeak' terminated by signal SIGTRAP (Trace or breakpoint trap)


Reference:
https://gitlab.freedesktop.org/beignet/beignet/-/issues/84
https://github.com/krrishnarraj/clpeak/issues/66