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glsl: Add a lowering pass to turn complicated UBO references to vector loads.

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v2: Reduce the impenetrable code in emit_ubo_loads() by 23 lines by keeping
    the ir_variable as the variable part of the offset from handle_rvalue(),
    and track the constant offsets from that with a plain old integer value,
    avoiding a bunch of temporary variables in the array and struct handling.
    Also, fix file description doxygen.
v3: Fix a row vs col typo, and fix spelling in a comment.

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt
2012-07-11 08:26:31 -07:00
parent 8c2a983835
commit a75f2681d2
3 changed files with 315 additions and 0 deletions
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src/glsl/ir_optimization.h
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@@ -74,6 +74,7 @@ bool lower_variable_index_to_cond_assign(exec_list *instructions,
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);
void lower_ubo_reference(struct gl_shader *shader, exec_list *instructions);
bool optimize_redundant_jumps(exec_list *instructions);
bool optimize_split_arrays(exec_list *instructions, bool linked);