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glsl: don't generate transform feedback candidate when not required

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If we are not even looking for one don't bother generating a candidate
list.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Timothy Arceri 2016-02-03 09:46:56 +11:00
parent c1bbaff1e8
commit ea7f64f74d
1 changed files with 4 additions and 2 deletions
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6
src/compiler/glsl/link_varyings.cpp
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@ -1643,8 +1643,10 @@ assign_varying_locations(struct gl_context *ctx,
(output_var->data.stream < MAX_VERTEX_STREAMS &&
producer->Stage == MESA_SHADER_GEOMETRY));
tfeedback_candidate_generator g(mem_ctx, tfeedback_candidates);
g.process(output_var);
if (num_tfeedback_decls > 0) {
tfeedback_candidate_generator g(mem_ctx, tfeedback_candidates);
g.process(output_var);
}
ir_variable *const input_var =
linker::get_matching_input(mem_ctx, output_var, consumer_inputs,