4 (declare (in) float arg0))
5 ((return (expression float log2 (var_ref arg0)))))
9 (declare (in) vec2 arg0))
10 ((return (expression vec2 log2 (var_ref arg0)))))
14 (declare (in) vec3 arg0))
15 ((return (expression vec3 log2 (var_ref arg0)))))
19 (declare (in) vec4 arg0))
20 ((return (expression vec4 log2 (var_ref arg0)))))