Test cases where the index/mask/delta is greater than or equal to the
maximum subgroup size. These are cases that return undefined results
but are not undefined behavior.
The index/mask/delta values now include values less than twice the
subgroup size, and 0xffffffff.
Testing for sub_group_shuffle_xor() already allowed inputs that were
greater or equal to the subgroup size for the last subgroup in a
workgroup, but did not properly account for this in the verification
function, potentially resulting in out of bounds accesses.
Signed-off-by: Stuart Brady <stuart.brady@arm.com>
c42cf518da