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glsl: Add a lowering pass to remove reads of shader output variables.

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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 <vljn@ovi.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Vincent Lejeune
2012-01-03 02:08:32 -08:00
committed by Dave Airlie
parent 293a3916bd
commit 6d4b35c036
3 changed files with 143 additions and 0 deletions
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1
src/glsl/ir_optimization.h
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@@ -72,6 +72,7 @@ bool lower_variable_index_to_cond_assign(exec_list *instructions,
bool lower_input, bool lower_output, bool lower_temp, bool lower_uniform);
bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz);
bool lower_clip_distance(exec_list *instructions);
void lower_output_reads(exec_list *instructions);
bool optimize_redundant_jumps(exec_list *instructions);
ir_rvalue *