1 int check_fa_work (const char *, const char *) __attribute__((noinline));
2 int check_fa_mid (const char *) __attribute__((noinline));
3 int check_fa (char *) __attribute__((noinline));
4 int how_much (void) __attribute__((noinline));
6 int check_fa_work (const char *c, const char *f)
11 return c >= f && f >= &d;
13 return c <= f && f <= &d;
16 int check_fa_mid (const char *c)
18 const char *f = __builtin_frame_address (0);
20 /* Prevent a tail call to check_fa_work, eliding the current stack frame. */
21 return check_fa_work (c, f) != 0;
24 int check_fa (char *unused)
28 return check_fa_mid (&c);
38 char *unused = __builtin_alloca (how_much ());
40 if (!check_fa(unused))