-- Copy & constant propagation

type either {
    left : integer -> either;
    right : bool -> either;
}

function main() : * {
    tmp[0] = 7;
    tmp[1] = tmp[0];
    tmp[0] = tmp[1];
    tmp[2] = tmp[0];
    -- tmp[2] = 7

    tmp[1] = tmp[0];
    tmp[0] = add tmp[1] 1;
    tmp[2] = add tmp[2] tmp[1];
    -- tmp[2] = 14

    tmp[0] = 19;
    tmp[1] = tmp[0];
    tmp[0] = add tmp[1] 1;
    tmp[3] = add tmp[0] tmp[1];
    tmp[4] = tmp[3];
    tmp[2] = add tmp[4] tmp[2];
    -- tmp[2] = 53

    tmp[1] = eq tmp[2] 54;
    tmp[0] = 4;
    tmp[3] = 3;
    tmp[4] = tmp[0];
    tmp[5] = 4;
    tmp[6] = tmp[5];
    br tmp[1] {
        true: {
            tmp[4] = 7;
        };
        false: {
            tmp[3] = tmp[6];
        };
    };
    tmp[2] = add tmp[2] tmp[4];
    tmp[2] = add tmp[2] tmp[3];
    -- tmp[2] = 61

    tmp[0] = alloc left (3);
    tmp[1] = 17;
    tmp[3] = tmp[1];
    case[either] tmp[0] {
        left: {
            tmp[4] = tmp[0].left[0];
            tmp[1] = tmp[4];
            tmp[3] = tmp[1];
        };
        right: {
            nop;
        };
    };
    tmp[2] = add tmp[2] tmp[3];
    -- tmp[2] = 64

    tmp[0] = alloc right (true);
    tmp[1] = 17;
    tmp[3] = tmp[1];
    case[either] tmp[0] {
        left: {
            tmp[1] = tmp[0].left[0];
        };
        right: {
            br tmp[0].right[0] {
                true: {
                    tmp[1] = add tmp[3] 1;
                };
                false: {
                    nop;
                };
            };
        };
    };
    tmp[2] = add tmp[2] tmp[1];
    -- tmp[2] = 82

    ret tmp[2];
}