[Bug 28606] [r300g]: Compiz focus blur effect does not work. (causes black windows instead)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28606

--- Comment #6 from Marek Olšák <maraeo at gmail.com> 2010-07-05 09:30:15 PDT ---
(In reply to comment #5)
> I think this bug is slightly different from the problem you are seeing with
> etqw.  The problem here is that the compiler is handed several TEX blocks and
> can't combine them into a single block.  It sounds like the problem with etqw
> is the same as https://bugs.freedesktop.org/show_bug.cgi?id=25109 where the
> compiler receives a large TEX block and can't keep all the instructions
> together.
> 
> A possible fix for this bug is to do some kind of register renaming before the
> scheduling.  Even though the TEX instructions are independent of each other,
> the scheduler can't schedule them together because they all write to the same
> register.  If each destination register for these TEX instructions were renamed
> to something unique, I think the scheduler would schedule them correctly.

You're right that the bug I was talking about is different from this one, but
it's also different from 25109. My respond continues here:
https://bugs.freedesktop.org/show_bug.cgi?id=28624#c2

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