gcc/testsuite/gcc.dg/pr82703.c

   1 /* PR target/82703 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -fno-tree-sra -ftree-vectorize" } */
   4
   5 __attribute__((noinline, noclone)) void
   6 compare (const double *p, const double *q)
   7 {
   8   for (int i = 0; i < 3; ++i)
   9     if (p[i] != q[i])
  10       __builtin_abort ();
  11 }
  12
  13 double vr[3] = { 4, 4, 4 };
  14
  15 int
  16 main ()
  17 {
  18   double v1[3] = { 1, 2, 3 };
  19   double v2[3] = { 3, 2, 1 };
  20   double v3[3];
  21   __builtin_memcpy (v3, v1, sizeof (v1));
  22   for (int i = 0; i < 3; ++i)
  23     v3[i] += v2[i];
  24   for (int i = 0; i < 3; ++i)
  25     v1[i] += v2[i];
  26   compare (v3, vr);
  27   return 0;
  28 }