This required relaxing a core NIR assertion which I don't think is doing
any important validation.
The shader-db effects here are small, but they're important for avoiding a
regression when we start doing per-component DCE in opt_shrink_vectors
(https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12468)
softpipe shader-db:
total instructions in shared programs: 2859777 -> 2859454 (-0.01%)
instructions in affected programs: 18881 -> 18558 (-1.71%)
total temps in shared programs: 293994 -> 293914 (-0.03%)
temps in affected programs: 418 -> 338 (-19.14%)
i915g:
total instructions in shared programs: 407562 -> 407544 (<.01%)
instructions in affected programs: 570 -> 552 (-3.16%)
r300:
total instructions in shared programs: 1414450 -> 1414459 (<.01%)
instructions in affected programs: 44494 -> 44503 (0.02%)
total vinst in shared programs: 473782 -> 473727 (-0.01%)
vinst in affected programs: 1102 -> 1047 (-4.99%)
total sinst in shared programs: 231224 -> 231216 (<.01%)
sinst in affected programs: 432 -> 424 (-1.85%)
total temps in shared programs: 197605 -> 197607 (<.01%)
temps in affected programs: 103 -> 105 (1.94%)
crocus hsw:
total instructions in shared programs: 8158185 -> 8158134 (<.01%)
instructions in affected programs: 10927 -> 10876 (-0.47%)
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15178>
Emma Anholt
b1f349dff4