gcc/testsuite/gcc.dg/pr93820.c

   1 /* PR tree-optimization/93820 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -fno-tree-dse" } */
   4
   5 typedef int v4si __attribute__((vector_size(4 * sizeof (int))));
   6 int a[10];
   7
   8 __attribute__((noipa)) int
   9 foo (int *p)
  10 {
  11   a[6] = *p;
  12   a[4] = 1;
  13   *(((v4si *)&a[0]) + 1) = (v4si) { 0, 0, 0, 0 };
  14   a[3] = 0;
  15 }
  16
  17 int
  18 main ()
  19 {
  20   int i = 0;
  21   foo (&i);
  22   for (i = 0; i < 10; i++)
  23     if (a[i])
  24       __builtin_abort ();
  25   return 0;
  26 }