| /* { dg-do run } */ | |
| #define N 23 | |
| #define MAX_LEN 13 | |
| char dst[N + 1]; | |
| void __attribute__((noipa)) | |
| invert(const char *id) | |
| { | |
| char buf[MAX_LEN]; | |
| char *ptr = buf + sizeof(buf); // start from the end of buf | |
| *(--ptr) = '\0'; // terminate string | |
| while (*id && ptr > buf) { | |
| *(--ptr) = *(id++); // copy id backwards | |
| } | |
| __builtin_strncpy(dst, ptr, N); // copy ptr/buf to dst | |
| } | |
| int main() | |
| { | |
| invert("abcde"); | |
| if (__builtin_strcmp(dst, "edcba")) | |
| __builtin_abort(); | |
| return 0; | |
| } |