brw: Use nir_opt_sink and more nir_opt_move

The shader-db results on most platforms are pretty mixed. However, this
seems to be a decent improvement in fossil-db.

shader-db::

Lunar Lake
total instructions in shared programs: 17019147 -> 17023017 (0.02%)
instructions in affected programs: 1200847 -> 1204717 (0.32%)
helped: 814 / HURT: 2458

total cycles in shared programs: 880532116 -> 880406462 (-0.01%)
cycles in affected programs: 798253846 -> 798128192 (-0.02%)
helped: 30064 / HURT: 33008

total spills in shared programs: 3262 -> 3260 (-0.06%)
spills in affected programs: 66 -> 64 (-3.03%)
helped: 1 / HURT: 2

total fills in shared programs: 1616 -> 1637 (1.30%)
fills in affected programs: 89 -> 110 (23.60%)
helped: 1 / HURT: 2

LOST:   241
GAINED: 356

Meteor Lake, DG2, and Tiger Lake had similar results. (Meteor Lake shown)
total instructions in shared programs: 19859724 -> 19865383 (0.03%)
instructions in affected programs: 2166810 -> 2172469 (0.26%)
helped: 942 / HURT: 3563

total cycles in shared programs: 879095859 -> 878616086 (-0.05%)
cycles in affected programs: 753840990 -> 753361217 (-0.06%)
helped: 33442 / HURT: 35053

total spills in shared programs: 4679 -> 4677 (-0.04%)
spills in affected programs: 80 -> 78 (-2.50%)
helped: 1 / HURT: 2

total fills in shared programs: 4113 -> 4175 (1.51%)
fills in affected programs: 87 -> 149 (71.26%)
helped: 1 / HURT: 2

LOST:   706
GAINED: 563

Ice Lake and Skylake had similar results. (Ice Lake shown)
total instructions in shared programs: 20610947 -> 20615741 (0.02%)
instructions in affected programs: 2138334 -> 2143128 (0.22%)
helped: 979 / HURT: 3635

total cycles in shared programs: 863103771 -> 862153697 (-0.11%)
cycles in affected programs: 731626072 -> 730675998 (-0.13%)
helped: 34060 / HURT: 34256

total spills in shared programs: 3992 -> 3949 (-1.08%)
spills in affected programs: 504 -> 461 (-8.53%)
helped: 8 / HURT: 6

total fills in shared programs: 3640 -> 3573 (-1.84%)
fills in affected programs: 1505 -> 1438 (-4.45%)
helped: 8 / HURT: 5

LOST:   622
GAINED: 1018

fossil-db:

All Intel platforms had similar results. (Lunar Lake shown)
Totals:
Instrs: 232649299 -> 232485503 (-0.07%); split: -0.16%, +0.09%
Subgroup size: 15932144 -> 15933056 (+0.01%); split: +0.01%, -0.00%
Loop count: 137431 -> 137430 (-0.00%)
Cycle count: 32619860020 -> 32714539770 (+0.29%); split: -0.80%, +1.09%
Spill count: 540835 -> 519861 (-3.88%); split: -4.79%, +0.91%
Fill count: 700278 -> 663650 (-5.23%); split: -6.46%, +1.23%
Scratch Memory Size: 37258240 -> 35654656 (-4.30%); split: -5.24%, +0.94%
Max live registers: 72561256 -> 71501759 (-1.46%); split: -1.62%, +0.16%
Non SSA regs after NIR: 67682385 -> 67692495 (+0.01%); split: -0.00%, +0.02%

Totals from 617432 (78.20% of 789594) affected shaders:
Instrs: 217754449 -> 217590653 (-0.08%); split: -0.17%, +0.10%
Subgroup size: 12656912 -> 12657824 (+0.01%); split: +0.01%, -0.00%
Loop count: 133283 -> 133282 (-0.00%)
Cycle count: 32367979192 -> 32462658942 (+0.29%); split: -0.81%, +1.10%
Spill count: 540770 -> 519796 (-3.88%); split: -4.79%, +0.91%
Fill count: 700277 -> 663649 (-5.23%); split: -6.46%, +1.23%
Scratch Memory Size: 37182464 -> 35578880 (-4.31%); split: -5.25%, +0.94%
Max live registers: 64912683 -> 63853186 (-1.63%); split: -1.81%, +0.18%
Non SSA regs after NIR: 60158776 -> 60168886 (+0.02%); split: -0.00%, +0.02%

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25463>

src/intel/compiler/brw_nir.c

@@ -2145,7 +2145,14 @@ brw_postprocess_nir(nir_shader *nir, const struct brw_compiler *compiler,
 
    OPT(nir_copy_prop);
    OPT(nir_opt_dce);
-   OPT(nir_opt_move, nir_move_comparisons);
+
+   nir_move_options move_all = nir_move_const_undef | nir_move_load_ubo |
+                               nir_move_load_input | nir_move_comparisons |
+                               nir_move_copies | nir_move_load_ssbo |
+                               nir_move_alu;
+
+   OPT(nir_opt_sink, move_all);
+   OPT(nir_opt_move, move_all);
    OPT(nir_opt_dead_cf);
 
    static const nir_lower_subgroups_options subgroups_options = {