impl frag_main {
    block b0:   // preds:
                // succs: b1 b2
    if %6 {
        block b1:   // preds: b0
        32     %7 = load_const (0x00000000 = 0.000000)
                    // succs: b3
    } else {
        block b2:  // preds: b0, succs: b3
    }
    32    %72 = extract_u16 %62, %81
    block b4:
}