ref: 09065798bf0445de3ec4a34ef714bdae3502f198
dir: /tests/cc/execute/0057-duff.c/
int main() { int count, n; char *from, *to; char a[39], b[39]; for(n = 0; n < 39; n++) { a[n] = n; b[n] = 0; } from = a; to = b; count = 39; n = (count + 7) / 8; switch (count % 8) { case 0: do { *to++ = *from++; case 7: *to++ = *from++; case 6: *to++ = *from++; case 5: *to++ = *from++; case 4: *to++ = *from++; case 3: *to++ = *from++; case 2: *to++ = *from++; case 1: *to++ = *from++; } while (--n > 0); } for(n = 0; n < 39; n++) if(a[n] != b[n]) return 1; return 0; }