broadcom/compiler: move buffer loads to lower register pressure

broadcom/compiler: move buffer loads to lower register pressure

If we are trying to lower register pressure this can make a big
difference in some cases. To avoid adding even more strategies,
merge this with disabling ubo load sorting, since they are basically
trying to do the same.

total instructions in shared programs: 12848024 -> 12844510 (-0.03%)
instructions in affected programs: 236537 -> 233023 (-1.49%)
helped: 195
HURT: 87
Instructions are helped.

total uniforms in shared programs: 3815601 -> 3814932 (-0.02%)
uniforms in affected programs: 31773 -> 31104 (-2.11%)
helped: 67
HURT: 115
Inconclusive result (value mean confidence interval includes 0).

total max-temps in shared programs: 2210803 -> 2210622 (<.01%)
max-temps in affected programs: 9362 -> 9181 (-1.93%)
helped: 114
HURT: 34
Max-temps are helped.

total spills in shared programs: 2556 -> 2330 (-8.84%)
spills in affected programs: 1391 -> 1165 (-16.25%)
helped: 39
HURT: 9

total fills in shared programs: 3840 -> 3317 (-13.62%)
fills in affected programs: 2379 -> 1856 (-21.98%)
helped: 39
HURT: 23

total sfu-stalls in shared programs: 21965 -> 21978 (0.06%)
sfu-stalls in affected programs: 2618 -> 2631 (0.50%)
helped: 45
HURT: 81
Inconclusive result (value mean confidence interval includes 0).

total inst-and-stalls in shared programs: 12869989 -> 12866488 (-0.03%)
inst-and-stalls in affected programs: 238771 -> 235270 (-1.47%)
helped: 193
HURT: 87
Inst-and-stalls are helped.

total nops in shared programs: 303501 -> 303274 (-0.07%)
nops in affected programs: 4159 -> 3932 (-5.46%)
helped: 87
HURT: 105
Inconclusive result (value mean confidence interval includes 0).

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22824>