There are too many algebraic optimizations to be certain that one of them
couldn't create instructions which need lowering. It also creates better
code for some reason.
fossil-db (parallel-rdp, Navi):
Totals from 217 (31.77% of 683) affected shaders:
VGPRs: 7716 -> 7672 (-0.57%)
CodeSize: 1516152 -> 1510688 (-0.36%); split: -0.38%, +0.02%
MaxWaves: 3964 -> 3982 (+0.45%)
Instrs: 269445 -> 268508 (-0.35%); split: -0.36%, +0.02%
Cycles: 37963416 -> 37912592 (-0.13%); split: -0.15%, +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/4791>
Rhys Perry
b2ce7da149