gcc/testsuite/gcc.c-torture/execute/pr82954.c

   1 /* PR tree-optimization/82954 */
   2
   3 __attribute__((noipa)) void
   4 foo (int *__restrict p, int *__restrict q)
   5 {
   6   p[0] = p[0] ^ 1;
   7   p[1] = p[1] ^ 2;
   8   p[2] = p[2] ^ q[2];
   9   p[3] = p[3] ^ q[3];
  10 }
  11
  12 int
  13 main ()
  14 {
  15   int p[4] = { 16, 32, 64, 128 };
  16   int q[4] = { 8, 4, 2, 1 };
  17   asm volatile ("" : : "g" (p), "g" (q) : "memory");
  18   foo (p, q);
  19   if (p[0] != 17 || p[1] != 34 || p[2] != 66 || p[3] != 129)
  20     __builtin_abort ();
  21   return 0;
  22 }