[Mesa-dev] [PATCH 2/2] prog_optimize: Add reads without writes optimization pass
idr at freedesktop.org
Sat Apr 2 19:36:33 PDT 2011
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On 03/30/2011 09:34 PM, Tom Stellard wrote:
> Ok, this makes sense. It would be pretty easy to modify my original patch
> to do this, but maybe it's better change the way ir_to_mesa.cpp converts
> conditional assignments to Mesa IR. Do you have any suggestions for how
> to determine if the left hand side of an ir_assignment has already been
> written to?
There's not a good way right now. The 2nd thing down on my to-do list
is ud-chains. Once we have that, it will be trivial. A lot of other
things (CSE, anyone?) will also be much easier.
For now, it's probably best to do it the way you're already doing it.
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