gcc/testsuite/gcc.dg/torture/pr44913.c

   1 /* { dg-do run } */
   2
   3 void __attribute__((noinline,noclone))
   4 foo (int *a, int n)
   5 {
   6   int *lasta = a + n;
   7   for (; a != lasta; a++)
   8     {
   9       *a *= 2;
  10       a[1] = a[-1] + a[-2];
  11     }
  12 }
  13 extern void abort (void);
  14 int main()
  15 {
  16   int a[16] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
  17   int r[16] = { 1, 2, 6, 6, 16, 24, 44, 80, 136, 248, 432, 768, 1360, 2400, 4256, 3760 };
  18   unsigned i;
  19   foo (&a[2], 13);
  20   for (i = 0; i < 8; ++i)
  21     if (a[i] != r[i])
  22       abort ();
  23   return 0;
  24 }