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lower_find_live_channel() in particular is used a lot in control flow to find the live channel for the surface/sampler handle. Adding UNDEFs on the temporary registers used for finding the live channels helps reduce the liveness of those temporary registers, especially in loops. Some titles affected : Rise Of The Tomb Raider: Totals from 2780 (22.58% of 12311) affected shaders: Instrs: 1294455 -> 1294592 (+0.01%); split: -0.15%, +0.16% Cycles: 1473136441 -> 1471302617 (-0.12%); split: -1.52%, +1.40% Max live registers: 144282 -> 143595 (-0.48%) Max dispatch width: 22200 -> 22232 (+0.14%) Red Dead Redemption 2: Totals from 435 (7.28% of 5972) affected shaders: Instrs: 488472 -> 487594 (-0.18%); split: -0.31%, +0.14% Cycles: 11354732 -> 11384928 (+0.27%); split: -0.44%, +0.71% Spill count: 1217 -> 1172 (-3.70%) Fill count: 3521 -> 3447 (-2.10%) Scratch Memory Size: 64512 -> 62464 (-3.17%) Max live registers: 35997 -> 35798 (-0.55%) Fallout 4: Totals from 8 (0.49% of 1638) affected shaders: Instrs: 41908 -> 40509 (-3.34%) Cycles: 3638464 -> 3555680 (-2.28%); split: -2.67%, +0.39% Spill count: 717 -> 665 (-7.25%) Fill count: 2542 -> 2438 (-4.09%) Scratch Memory Size: 32768 -> 16384 (-50.00%) Max live registers: 567 -> 534 (-5.82%) Cyberpunk 2077: Totals from 2984 (28.97% of 10301) affected shaders: Instrs: 3888874 -> 3891600 (+0.07%); split: -0.20%, +0.27% Cycles: 67906489 -> 67767721 (-0.20%); split: -0.68%, +0.47% Spill count: 200 -> 98 (-51.00%) Fill count: 237 -> 90 (-62.03%) Scratch Memory Size: 10240 -> 8192 (-20.00%) Max live registers: 215715 -> 212727 (-1.39%) Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Francisco Jerez <currojerez@riseup.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24282> |
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