modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr35472.c (about)

     1  extern void abort (void);
     2  extern void *memset (void *s, int c, __SIZE_TYPE__ n);
     3  struct S { int i[16]; };
     4  struct S *p;
     5  void __attribute__((noinline,noclone))
     6  foo(struct S *a, struct S *b) { a->i[0] = -1; p = b; }
     7  void test (void)
     8  {
     9    struct S a, b;
    10    memset (&a.i[0], '\0', sizeof (a.i));
    11    memset (&b.i[0], '\0', sizeof (b.i));
    12    foo (&a, &b);
    13    *p = a;
    14    *p = b;
    15    if (b.i[0] != -1)
    16      abort ();
    17  }
    18  int main()
    19  {
    20    test();
    21    return 0;
    22  }