modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr38236.c (about)

     1  struct X { int i; };
     2  
     3  int __attribute__((noinline))
     4  foo (struct X *p, int *q, int a, int b)
     5  {
     6    struct X x, y;
     7    if (a)
     8      p = &x;
     9    if (b)
    10      q = &x.i;
    11    else
    12      q = &y.i;
    13    *q = 1;
    14    return p->i; 
    15  }
    16  extern void abort (void);
    17  int main()
    18  {
    19    if (foo((void *)0, (void *)0, 1, 1) != 1)
    20      abort ();
    21    return 0;
    22  }