question about reqd_sub_group_size

[jinz2014]

When building a SYCL program targeting an AMD GPU that has a sub group size of 64, [[intel::reqd_sub_group_size(32)]] will cause compile error. Will you disable the generation of the attribute ?

[tomflinda]

@jinz2014 Could you try to change "[[intel::reqd_sub_group_size(32)]]" to "[[sycl::reqd_sub_group_size(32)]]", and could it be built pass?

[jinz2014]

The compile time warning is
warning: attribute argument 32 is invalid and will be ignored; amdgcn requires sub_group size 64 [-Wincorrect-sub-group-size]

The runtime error is
terminate called after throwing an instance of 'sycl::_V1::exception'
what(): Sub-group size 32 is not supported on the device