https://bugs.freedesktop.org/show_bug.cgi?id=29762

--- Comment #2 from Marek Olšák <mar...@gmail.com> 2010-08-25 18:35:47 PDT ---
The compiler error is valid. Relative addressing (array indexing) is not
implemented for fragment shaders.

The hardware only suppports relative addressing using the loop counter and only
on r500. The loop counter register type has been removed in Gallium so it
cannot be implemented directly. Some non-trivial work is needed in the
compiler.

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