[Bug 30007] Regression in r300g

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30007

--- Comment #20 from Marek Olšák <maraeo at gmail.com> 2010-09-12 14:45:29 PDT ---
(In reply to comment #18)
> (In reply to comment #9)
> > Thanks. I am pretty sure the GLSL compiler fails to unroll a loop.
> 
> I think the shader that failed to compile is a different shader that we use for
> scaling textures for the taskbar thumbnails. The blur shader doesn't use loops.
> 
> But I have attached a piglit test that I hope can be used to reproduce the bug.
> 
> I don't have an R300, but the blur shader works for me with R600C and the new
> GLSL compiler. The piglit test fails with R600G, but not with the symptoms
> described in this bug report.

Why would you use relative addressing (= indirect indexing) in the fragment
shader then? If it's not indexing with a loop counter (my assumption), what is
it?

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