[Bug 84977] r300/compiler: register allocation pass generate invalid swizzle for r300/r400

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84977

--- Comment #7 from Tom Stellard <tstellar at gmail.com> ---
(In reply to David Heidelberger (okias) from comment #6)
> in function r300FPTranslateRGBSwizzle is return value of sd == 0 (for sure)

So it sounds like this might be a bug somewhere in
rc_reg_class_variable_get_class()

At the very bottom of this function, there is a call to find_class(), it would
be good to put a printf to check the value of can_change_writemask and also
class_index.

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