1 2 3 void test(void (*fun)(void)); test(void (* fun)(void))4void test(void (*fun)(void)) 5 { 6 typedef typeof(__builtin_trap) t; // OK 7 void (*f)(void); 8 int i; 9 10 f = __builtin_trap; 11 f = &__builtin_trap; 12 f = *__builtin_trap; // OK for GCC 13 f = __builtin_trap + 0; 14 f = __builtin_trap + 1; 15 f = __builtin_trap - 1; 16 17 // (void) __builtin_trap; 18 f = (void*) __builtin_trap; 19 f = (unsigned long) __builtin_trap; 20 21 i = !__builtin_trap; 22 i = (__builtin_trap > fun); 23 i = (__builtin_trap == fun); 24 i = (fun < __builtin_trap); 25 i = (fun == __builtin_trap); 26 27 __builtin_trap - fun; 28 fun - __builtin_trap; 29 } 30 31 /* 32 * check-name: builtin arithmetic 33 * check-command: sparse -Wno-decl $file 34 * check-known-to-fail 35 * 36 * check-error-start 37 builtin-arith.c:10:xx: error: ... 38 builtin-arith.c:11:xx: error: ... 39 builtin-arith.c:13:xx: error: arithmetics on pointers to functions 40 builtin-arith.c:14:xx: error: arithmetics on pointers to functions 41 builtin-arith.c:15:xx: error: arithmetics on pointers to functions 42 builtin-arith.c:18:xx: error: ... 43 builtin-arith.c:19:xx: error: ... 44 builtin-arith.c:21:xx: error: ... 45 builtin-arith.c:22:xx: error: ... 46 builtin-arith.c:23:xx: error: ... 47 builtin-arith.c:24:xx: error: ... 48 builtin-arith.c:25:xx: error: ... 49 builtin-arith.c:27:24: error: subtraction of functions? Share your drugs 50 builtin-arith.c:28:13: error: subtraction of functions? Share your drugs 51 * check-error-end 52 */ 53