Generating a bad OpExecutionModel

[aarongreig]

This kernel:

__kernel __attribute__((vec_type_hint(uchar))) void sample_test(__global int *src, __global int *dst)
{
    int  tid = get_global_id(0);
    dst[tid] = src[tid];
}

generated by the OpenCL CTS produces a SPIR-V module with this instruction: OpExecutionMode %entryPoint VecTypeHint 0 when translated with SPIRV-LLVM/build/bin/clang cc1 -emit-spirv -triple spir64-unknown-unknown -cl-std=CL1.2 -include opencl.h -x cl. Zero in the lower 16 bits of the VecTypeHint literal correctly encodes char, but I think the upper 16 should contain a 1 for the vector width. Other type/width combinations from this test seem to be translated correctly.