modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20010209-1.c (about)

     1  /* { dg-require-effective-target alloca } */
     2  int b;
     3  int foo (void)
     4  {
     5    int x[b];
     6    int bar (int t[b])
     7    {
     8      int i;
     9      for (i = 0; i < b; i++)
    10        t[i] = i + (i > 0 ? t[i-1] : 0);
    11      return t[b-1];
    12    }
    13    return bar (x);
    14  }
    15  
    16  int main ()
    17  {
    18    b = 6;
    19    if (foo () != 15)
    20      abort ();
    21    exit (0);
    22  }