Use the explicit version of the atomic_load/store and atomic_fetch_add
with memory order relaxed and memory scope workgroup to allow devices
that only support the minimum CL_DEVICE_ATOMIC_MEMORY_CAPABILITIES which
are (CL_DEVICE_ATOMIC_ORDER_RELAXED | CL_DEVICE_ATOMIC_SCOPE_WORK_GROUP)
to run the tests.
The test should only require the relaxed ordering and memory scope
workgroup anyway.
From the specificiation:
"The non-explicit atomic_store function requires support for OpenCL C
2.0, or OpenCL C 3.0 or newer and both the
__opencl_c_atomic_order_seq_cst and __opencl_c_atomic_scope_device
features"
"The non-explicit atomic_load function requires support for OpenCL C 2.0
or OpenCL C 3.0 or newer and both the __opencl_c_atomic_order_seq_cst
and __opencl_c_atomic_scope_device features."
"The non-explicit atomic_fetch_key functions require support for OpenCL
C 2.0, or OpenCL C 3.0 or newer and both the
__opencl_c_atomic_order_seq_cst and __opencl_c_atomic_scope_device
features."
The atomic operations are tested with generic pointers but in a way
where the compiler can infer the original pointer address space. This
commit adds tests specifically for the case where the compiler cannot
make inferences.
Test that the correct address is used with atomics when the address is
group variant and invariant.
