fa869f45c8
On gen11, the removed the PLN instruction so we have to emit a pile of
MAD to emulate it. We may as well do that in NIR so we can optimize and
later schedule it.
Shader-db results on Ice Lake:
total instructions in shared programs: 17145644 -> 16556440 (-3.44%)
instructions in affected programs: 11507454 -> 10918250 (-5.12%)
helped: 35763
HURT: 42085
helped stats (abs) min: 1 max: 140 x̄: 19.09 x̃: 18
helped stats (rel) min: 0.04% max: 37.93% x̄: 15.40% x̃: 14.49%
HURT stats (abs) min: 1 max: 248 x̄: 2.22 x̃: 2
HURT stats (rel) min: 0.05% max: 50.00% x̄: 5.00% x̃: 2.47%
95% mean confidence interval for instructions value: -7.67 -7.47
95% mean confidence interval for instructions %-change: -4.46% -4.29%
Instructions are helped.
total loops in shared programs: 4370 -> 4370 (0.00%)
loops in affected programs: 0 -> 0
helped: 0
HURT: 0
total cycles in shared programs: 360624645 -> 368220857 (2.11%)
cycles in affected programs: 269631244 -> 277227456 (2.82%)
helped: 15583
HURT: 65874
helped stats (abs) min: 1 max: 28561 x̄: 78.45 x̃: 32
helped stats (rel) min: <.01% max: 67.81% x̄: 5.38% x̃: 2.44%
HURT stats (abs) min: 1 max: 238638 x̄: 133.87 x̃: 20
HURT stats (rel) min: <.01% max: 306.25% x̄: 5.81% x̃: 3.97%
95% mean confidence interval for cycles value: 67.42 119.09
95% mean confidence interval for cycles %-change: 3.61% 3.73%
Cycles are HURT.
total spills in shared programs: 8943 -> 8981 (0.42%)
spills in affected programs: 1925 -> 1963 (1.97%)
helped: 44
HURT: 14
total fills in shared programs: 21815 -> 21925 (0.50%)
fills in affected programs: 3511 -> 3621 (3.13%)
helped: 41
HURT: 18
LOST: 70
GAINED: 14
Reviewed-by: Matt Turner <mattst88@gmail.com>
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