| What | Removed | Added |
|---|---|---|
| CC | kenneth@whitecape.org |
Comment # 3
on bug 89944
from Sami Liedes
I bisected this down to this commit: ------------------------------------------------------------ commit 30f51f1a1a70bc838d5bed449daff0dd9f2e8ef2 Author: Kenneth Graunke <kenneth@whitecape.org> Date: Wed Oct 22 20:48:21 2014 -0700 glsl: Optimize "if (cond) discard;" to a conditional discard. st_glsl_to_tgsi and ir_to_mesa have handled conditional discards for a long time; the previous patch added that capability to i965. i965 (Haswell) shader-db stats: Without NIR: total instructions in shared programs: 5792133 -> 5776360 (-0.27%) instructions in affected programs: 737585 -> 721812 (-2.14%) helped: 6300 HURT: 68 GAINED: 2 With NIR: total instructions in shared programs: 5787538 -> 5769569 (-0.31%) instructions in affected programs: 767843 -> 749874 (-2.34%) helped: 6522 HURT: 35 GAINED: 6 Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Connor Abbott <cwabbott0@gmail.com> Reviewed-by: Matt Turner <mattst88@gmail.com> Reviewed-by: Eric Anholt <eric@anholt.net> ------------------------------------------------------------ I can also confirm that reverting that commit on top of recent HEAD (4deca127) fixes the issue. I can attach R600_DEBUG=ps,gs,vs output from the offending commit and its parent if you think comparing them is of any use.
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