Ian Romanick
d2a9ba03e3
This reverts commit7acc865226. With these optimizations in place, the extra constant folding added in the next commit extends some live ranges of 0.0 and ±1.0 constants, and that causes several hundred shaders to have more spills and fills. I believe this optimization we made basically irrelevant by7725d60938"intel/fs: Emit better code for b2f(inot(a)) and b2i(inot(a))". All Gen7.5+ platforms had similar results. (Ice Lake shown) total instructions in shared programs: 17225303 -> 17224634 (<.01%) instructions in affected programs: 879402 -> 878733 (-0.08%) helped: 679 HURT: 1 helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1 helped stats (rel) min: 0.03% max: 0.93% x̄: 0.24% x̃: 0.05% HURT stats (abs) min: 10 max: 10 x̄: 10.00 x̃: 10 HURT stats (rel) min: 0.45% max: 0.45% x̄: 0.45% x̃: 0.45% 95% mean confidence interval for instructions value: -1.02 -0.95 95% mean confidence interval for instructions %-change: -0.26% -0.22% Instructions are helped. total cycles in shared programs: 360842595 -> 360828542 (<.01%) cycles in affected programs: 110443594 -> 110429541 (-0.01%) helped: 389 HURT: 265 helped stats (abs) min: 1 max: 7525 x̄: 162.81 x̃: 28 helped stats (rel) min: <.01% max: 18.66% x̄: 1.11% x̃: 0.11% HURT stats (abs) min: 1 max: 7614 x̄: 185.96 x̃: 48 HURT stats (rel) min: <.01% max: 25.08% x̄: 0.95% x̃: 0.10% 95% mean confidence interval for cycles value: -75.65 32.67 95% mean confidence interval for cycles %-change: -0.49% -0.06% Inconclusive result (value mean confidence interval includes 0). total spills in shared programs: 12159 -> 12161 (0.02%) spills in affected programs: 13 -> 15 (15.38%) helped: 0 HURT: 1 total fills in shared programs: 25207 -> 25208 (<.01%) fills in affected programs: 25 -> 26 (4.00%) helped: 0 HURT: 1 Ivy Bridge total instructions in shared programs: 12082019 -> 12082013 (<.01%) instructions in affected programs: 1033 -> 1027 (-0.58%) helped: 6 HURT: 0 helped stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1 helped stats (rel) min: 0.41% max: 0.83% x̄: 0.61% x̃: 0.59% 95% mean confidence interval for instructions value: -1.00 -1.00 95% mean confidence interval for instructions %-change: -0.78% -0.45% Instructions are helped. total cycles in shared programs: 179849270 -> 179849157 (<.01%) cycles in affected programs: 4735 -> 4622 (-2.39%) helped: 4 HURT: 0 helped stats (abs) min: 2 max: 74 x̄: 28.25 x̃: 18 helped stats (rel) min: 0.13% max: 6.53% x̄: 2.85% x̃: 2.36% 95% mean confidence interval for cycles value: -82.73 26.23 95% mean confidence interval for cycles %-change: -7.98% 2.28% Inconclusive result (value mean confidence interval includes 0). Sandy Bridge total instructions in shared programs: 10882750 -> 10882748 (<.01%) instructions in affected programs: 266 -> 264 (-0.75%) helped: 2 HURT: 0 Iron Lake total cycles in shared programs: 188609440 -> 188609448 (<.01%) cycles in affected programs: 4320 -> 4328 (0.19%) helped: 0 HURT: 2 GM45 total cycles in shared programs: 129016868 -> 129016872 (<.01%) cycles in affected programs: 2302 -> 2306 (0.17%) helped: 0 HURT: 1 Reviewed-by: Matt Turner <mattst88@gmail.com>
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