Rhys Perry
19ca34ed27
aco: don't create phis with undef operands in the boolean phi pass
...
We can create better merge code is we pass on undef.
fossil-db (Navi):
Totals from 1208 (0.89% of 135946) affected shaders:
SGPRs: 66864 -> 66200 (-0.99%); split: -1.04%, +0.05%
SpillSGPRs: 1179 -> 1156 (-1.95%)
CodeSize: 6516672 -> 6469564 (-0.72%); split: -0.76%, +0.04%
Instrs: 1232680 -> 1220859 (-0.96%); split: -0.97%, +0.01%
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3388 >
2020-07-10 22:36:14 +00:00
Rhys Perry
9a089baff1
aco: optimize boolean phis with uniform selections
...
Even though the boolean can be divergent, the control flow can be (at
least partially) uniform. For example, we don't have to create any
s_andn2_b64/s_and_b64/s_or_b64 instructions with this code:
a = ...
loop {
b = bool_phi a, c
if (uniform)
break
c = ...
}
d = phi c
fossil-db (Navi):
Totals from 5506 (4.05% of 135946) affected shaders:
SGPRs: 605720 -> 604024 (-0.28%)
SpillSGPRs: 52025 -> 51733 (-0.56%)
CodeSize: 65221188 -> 64957808 (-0.40%); split: -0.41%, +0.00%
Instrs: 12637881 -> 12584610 (-0.42%); split: -0.42%, +0.00%
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3388 >
2020-07-10 22:36:14 +00:00
Rhys Perry
f622e80494
aco: create better code for boolean phis with constant operands
...
fossil-db (Navi):
Totals from 6394 (4.70% of 135946) affected shaders:
SGPRs: 651408 -> 651344 (-0.01%)
SpillSGPRs: 52102 -> 52019 (-0.16%)
CodeSize: 68369664 -> 68229180 (-0.21%); split: -0.21%, +0.00%
Instrs: 13236611 -> 13202126 (-0.26%); split: -0.26%, +0.00%
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3388 >
2020-07-10 22:36:14 +00:00
Rhys Perry
47b0653d5d
aco: rework boolean phi pass
...
The pass should now create much less linear phis.
Removes piles of phis and lots of sgpr spilling from Detroit: Become
Human and parallel-rdp.
fossil-db (Navi):
Totals from 7654 (5.63% of 135946) affected shaders:
SGPRs: 796224 -> 787616 (-1.08%); split: -1.08%, +0.00%
VGPRs: 576164 -> 572116 (-0.70%); split: -0.70%, +0.00%
SpillSGPRs: 147695 -> 52258 (-64.62%)
SpillVGPRs: 2167 -> 2102 (-3.00%)
CodeSize: 80671680 -> 76240420 (-5.49%); split: -5.50%, +0.01%
Scratch: 137216 -> 135168 (-1.49%)
MaxWaves: 54235 -> 54707 (+0.87%)
Instrs: 15569429 -> 14820569 (-4.81%); split: -4.82%, +0.01%
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Co-authored-by: Daniel Schürmann <daniel@schuermann.dev>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3388 >
2020-07-10 22:36:14 +00:00
Daniel Schürmann
331794495e
aco: rename aco_lower_bool_phis() -> aco_lower_phis()
...
We also lower subdword phis, now.
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4492 >
2020-04-10 07:19:27 +00:00
