+ visit_list_elements(this, shader->ir);
+ }
+
+ void prepare_array(exec_list *ir,
+ ir_variable **new_var,
+ int max_elements, unsigned start_location,
+ const char *var_name, const char *mode_str,
+ unsigned usage, unsigned external_usage)
+ {
+ void *const ctx = ir;
+
+ for (int i = max_elements-1; i >= 0; i--) {
+ if (usage & (1 << i)) {
+ char name[32];
+
+ if (!(external_usage & (1 << i))) {
+ /* This varying is unused in the next stage. Declare
+ * a temporary instead of an output. */
+ snprintf(name, 32, "gl_%s_%s%i_dummy", mode_str, var_name, i);
+ new_var[i] =
+ new (ctx) ir_variable(glsl_type::vec4_type, name,
+ ir_var_temporary);
+ }
+ else {
+ snprintf(name, 32, "gl_%s_%s%i", mode_str, var_name, i);
+ new_var[i] =
+ new(ctx) ir_variable(glsl_type::vec4_type, name,
+ this->info->mode);
+ new_var[i]->data.location = start_location + i;
+ new_var[i]->data.explicit_location = true;
+ new_var[i]->data.explicit_index = 0;
+ }
+
+ ir->head->insert_before(new_var[i]);
+ }
+ }