reference/shaders/comp/ssbo-array-length.comp

#version 450
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

layout(binding = 1, std140) buffer SSBO
{
    uint size;
    float v[];
} _11;

void main()
{
    _11.size = uint(int(uint(_11.v.length())));
}