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intel: Switch to new-style registers

Faith Ekstrand requested to merge gfxstrand/mesa:intel/nir-reg into main

Shader-db results on HSW (vec4 only):

total instructions in shared programs: 2978400 -> 2974135 (-0.14%)
instructions in affected programs: 77870 -> 73605 (-5.48%)
helped: 143
HURT: 48
helped stats (abs) min: 1 max: 100 x̄: 30.22 x̃: 9
helped stats (rel) min: 0.03% max: 30.49% x̄: 8.02% x̃: 6.39%
HURT stats (abs)   min: 1 max: 4 x̄: 1.19 x̃: 1
HURT stats (rel)   min: 0.08% max: 16.67% x̄: 3.71% x̃: 3.23%
95% mean confidence interval for instructions value: -26.69 -17.97
95% mean confidence interval for instructions %-change: -6.24% -3.90%
Instructions are helped.

total cycles in shared programs: 45345924 -> 44742666 (-1.33%)
cycles in affected programs: 29083466 -> 28480208 (-2.07%)
helped: 4785
HURT: 3879
helped stats (abs) min: 2 max: 8072 x̄: 276.00 x̃: 24
helped stats (rel) min: 0.02% max: 54.43% x̄: 7.78% x̃: 1.95%
HURT stats (abs)   min: 2 max: 14736 x̄: 184.95 x̃: 20
HURT stats (rel)   min: 0.02% max: 97.00% x̄: 7.69% x̃: 1.53%
95% mean confidence interval for cycles value: -83.49 -55.77
95% mean confidence interval for cycles %-change: -1.16% -0.55%
Cycles are helped.

total spills in shared programs: 1093 -> 539 (-50.69%)
spills in affected programs: 772 -> 218 (-71.76%)
helped: 74
HURT: 0

total fills in shared programs: 760 -> 757 (-0.39%)
fills in affected programs: 66 -> 63 (-4.55%)
helped: 3
HURT: 0

Shader-db results on TGL (all stages):

total instructions in shared programs: 21486982 -> 21488266 (<.01%)
instructions in affected programs: 2245938 -> 2247222 (0.06%)
helped: 1288
HURT: 1385
helped stats (abs) min: 1 max: 93 x̄: 4.05 x̃: 2
helped stats (rel) min: 0.02% max: 3.82% x̄: 0.61% x̃: 0.46%
HURT stats (abs)   min: 1 max: 134 x̄: 4.69 x̃: 2
HURT stats (rel)   min: <.01% max: 5.59% x̄: 0.65% x̃: 0.44%
95% mean confidence interval for instructions value: 0.13 0.83
95% mean confidence interval for instructions %-change: <.01% 0.08%
Instructions are HURT.

total cycles in shared programs: 809326677 -> 809475669 (0.02%)
cycles in affected programs: 447781659 -> 447930651 (0.03%)
helped: 1924
HURT: 1994
helped stats (abs) min: 1 max: 74567 x̄: 1217.49 x̃: 10
helped stats (rel) min: <.01% max: 38.44% x̄: 1.09% x̃: 0.17%
HURT stats (abs)   min: 1 max: 76426 x̄: 1249.47 x̃: 8
HURT stats (rel)   min: <.01% max: 137.11% x̄: 1.64% x̃: 0.17%
95% mean confidence interval for cycles value: -125.61 201.67
95% mean confidence interval for cycles %-change: 0.12% 0.48%
Inconclusive result (value mean confidence interval includes 0).

LOST:   4
GAINED: 4

Cc @alyssa @cmarcelo @kwg

Edited by Faith Ekstrand

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