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| 1 | - | //*(&x + 8) = the value of x from the previous iteration |
| 1 | + | #define PREVIOUS_FRAME(x) (*(int *)(x + ((int *)__builtin_frame_address(1) - (int *)__builtin_frame_address(0)))) |
| 2 | void f(int x) | |
| 3 | {
| |
| 4 | if (x > 0) | |
| 5 | {
| |
| 6 | x = -x; | |
| 7 | printf("1\n");
| |
| 8 | f(-2); | |
| 9 | } | |
| 10 | else | |
| 11 | {
| |
| 12 | - | if (*(&x + 8) <= x) |
| 12 | + | if (PREVIOUS_FRAME(&x) <= x) |
| 13 | {
| |
| 14 | printf("%i\n", -x);
| |
| 15 | - | if (*(&x + 8) != x) |
| 15 | + | if (PREVIOUS_FRAME(&x) != x) |
| 16 | - | f(*(&x + 8)); |
| 16 | + | f(PREVIOUS_FRAME(&x)); |
| 17 | } | |
| 18 | else | |
| 19 | {
| |
| 20 | - | printf("%i\n", -(*(&x + 8) - 1));
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| 20 | + | printf("%i\n", -(PREVIOUS_FRAME(&x) - 1));
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| 21 | - | if (x != *(&x + 8) - 1) |
| 21 | + | if (x != PREVIOUS_FRAME(&x) - 1) |
| 22 | - | f(*(&x + 8) - 2); |
| 22 | + | f(PREVIOUS_FRAME(&x) - 2); |
| 23 | } | |
| 24 | } | |
| 25 | } |
