This was missed in 0bf6dcb785
There is a loop which iterates over a temp array. NIR optimization
moves the real work out of the loop and what remains are just ALU ops
with undefs. So after converting undefs to zero, the ALU ops are
optimized out and DCE kills the loop. This is a good thing in
general and we don't fail the linking due to the loop presence.
However than we hit the shader constants and ALU limits later :-(
So from dEQP POW we go from NotSupported to Fail.
Fixes: 0bf6dcb785
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24134>
(cherry picked from commit 0a2a7bfd19)
2089ce9ffc