This is not safe when we have conditional spills since we could be
spilling disabled lanes with undefined values that could overwrite
valid data for those lanes from a previous spill of the same temp
that was unconditional (or that condionally enabled those same
lanes).
Fixes some Piglit OpenCL tests as well as the following OpenCL tests:
integer_divideAssign
integer_moduloAssign
integer_mad_sat
integer_ops integer_divideAssign
integer_ops integer_mad_sat
integer_ops integer_moduloAssign
integer_ops quick_char_math
integer_ops quick_short_math
math_brute_force half_powr
math_brute_force pow
math_brute_force pown
math_brute_force powr
math_brute_force rootn
Fixes: 597560e27c ('broadcom/compiler: always enable per-quad on spill operations')
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29909>
(cherry picked from commit d1f8351f3c)
f58569a7c3