flowchart TB
    ps["fragment MSL"] --> q{"calls get_sample_position()?"}
    q -->|"no"| icb["pipeline with ICB support<br/>ExecuteIndirect encoded on the GPU"]
    q -->|"yes"| noicb["pipeline without ICB support<br/>ExecuteIndirect drawn one by one"]
    subgraph spike["with ICB support (spike, M1 Max)"]
        direction LR
        w1["+ depth / buffer / atomic write"] --> crash["compiler crashes or hangs"]
        w2["+ texture write"] --> err["clean error"]
        w3["colour only"] --> okc["compiles"]
    end
    q ~~~ spike