r300: Remove broken optimization in rc_transform_KILL
The logic was reversed so this was not only not working but it was also removing random instructions around. The special IF-KILP-ENDIF case this optimization was targeting is already transformed to KILL_IF in the TGSI, so just remove this altogether. This fixes piglit glsl-fs-discard-04 v2: Update the comment as well Closes: mesa/mesa#343 Signed-off-by:Pavel Ondračka <pavel.ondracka@gmail.com> Reviewed-by:
Filip Gawin <filip.gawin@zoho.com> Reviewed-by:
Marek Olšák <marek.olsak@amd.com> Reviewed-by:
Emma Anholt <emma@anholt.net> Cc: mesa-stable Part-of: <mesa/mesa!14378>