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* glsl: Add a lowering pass to remove reads of shader output variables.Vincent Lejeune2012-01-061-0/+141
This is similar to Gallium's existing glsl_to_tgsi::remove_output_read lowering pass, but done entirely inside the GLSL compiler. Signed-off-by: Vincent Lejeune <[email protected]> Signed-off-by: Kenneth Graunke <[email protected]> Signed-off-by: Dave Airlie <[email protected]>