test_shader.comp

#version 450

layout (local_size_x = 1) in;

layout(set = 0, binding = 0) buffer a { float pa[]; };
layout(set = 0, binding = 1) buffer b { float pb[]; };

void main() {
    uint index = gl_GlobalInvocationID.x;
    pb[index] = pa[index];
    pa[index] = index;
}