repos / gbc

stack_alloc.b

 1// TODO(2025-06-05 17:45:36): Ken Thompson, Users' Reference to B, 9.3
 2// printf implementation implies that the autovars are layed out in the memory from left to right,
 3// but our IR assumes right to left, due to how the stack works on the majority of modern platforms
 4// Consider making this more historically accurate.
 5
 6variadic(a, b, c) {
 7    auto args, i;
 8    args = &c;
 9    extrn printf;
10    i = 3; while (i > 0) printf("%d\n", args[--i]);
11}
12
13structure(args) {
14    args[0] = 1;
15    args[1] = 2;
16    args[2] = 3;
17}
18
19main() {
20    auto c, b, a;
21    structure(&a);
22    extrn printf;
23    printf("a = %d\n", a);
24    printf("b = %d\n", b);
25    printf("c = %d\n", c);
26    variadic(69, 420, 1337);
27}