diff options
author | Timothy Arceri <[email protected]> | 2018-08-29 10:24:43 -0500 |
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committer | Timothy Arceri <[email protected]> | 2018-09-14 16:07:36 +1000 |
commit | ef4ad7baf176fe1820c7ec771b8c801efcbc4846 (patch) | |
tree | 97e400c074e49fc87c4092313e8d00044bc883c9 /src/mesa/.gitignore | |
parent | fa5e9f1f73f64ac089f8efd5b101a77d06d22fcd (diff) |
nir: evaluate if condition uses inside the if branches
Since we know what side of the branch we ended up on we can just
replace the use with a constant.
All the spill changes in shader-db are from Dolphin uber shaders,
despite some small regressions the change is clearly positive.
V2: insert new constant after any phis in the
use->parent_instr->type == nir_instr_type_phi path.
v3:
- use nir_after_block_before_jump() for inserting const
- check dominance of phi uses correctly
v4:
- create some helpers as suggested by Jason.
v5 (Jason Ekstrand):
- Use LIST_ENTRY to get the phi src
shader-db results IVB:
total instructions in shared programs: 9999201 -> 9993483 (-0.06%)
instructions in affected programs: 163235 -> 157517 (-3.50%)
helped: 132
HURT: 2
total cycles in shared programs: 231670754 -> 219476091 (-5.26%)
cycles in affected programs: 143424120 -> 131229457 (-8.50%)
helped: 115
HURT: 24
total spills in shared programs: 4383 -> 4370 (-0.30%)
spills in affected programs: 1656 -> 1643 (-0.79%)
helped: 9
HURT: 18
total fills in shared programs: 4610 -> 4581 (-0.63%)
fills in affected programs: 374 -> 345 (-7.75%)
helped: 6
HURT: 0
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src/mesa/.gitignore')
0 files changed, 0 insertions, 0 deletions