https://bugs.freedesktop.org/show_bug.cgi?id=31830 --- Comment #19 from Marek OlÅÃk <maraeo@xxxxxxxxx> 2011-01-28 10:56:20 PST --- I think I know the reason why it's slow with the rename_regs pass. The statistics of the most complex shader are: ~~~~~~~~ FRAGMENT PROGRAM ~~~~~~~ ~ 108 Instructions ~ 71 Vector Instructions (RGB) ~ 35 Scalar Instructions (Alpha) ~ 0 Flow Control Instructions ~ 36 Texture Instructions ~ 2 Presub Operations ~ 36 Temporary Registers ~~~~~~~~~~~~~~ END ~~~~~~~~~~~~~~ If you disable rename_regs, you will get: ~~~~~~~~ FRAGMENT PROGRAM ~~~~~~~ ~ 143 Instructions ~ 71 Vector Instructions (RGB) ~ 35 Scalar Instructions (Alpha) ~ 0 Flow Control Instructions ~ 36 Texture Instructions ~ 2 Presub Operations ~ 4 Temporary Registers ~~~~~~~~~~~~~~ END ~~~~~~~~~~~~~~ Wow, 4 temps! It definitely appears to be a register allocator issue. Even though the rename_regs pass has helped with instruction scheduling a lot, it made regalloc perform much worse. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
